RU2843572C1 - Cartridge for use with aerosol-generating device - Google Patents

Abstract

FIELD: smoking accessories.

SUBSTANCE: inventions group relates to tobacco industry, in particular, to devices simulating the tobacco smoking process. Cartridge for use with the aerosol-generating device is configured to be engaged with and detached from the device. Cartridge comprises a mouthpiece, a body containing a current-collecting material. Body defines a cavity for accommodating an aerosol-forming substrate. Cartridge contains a pusher. Part of the ejector is configured to slide in the cavity to eject an aerosol-forming substrate from the cavity. Disclosed is an aerosol-generating system comprising an aerosol-generating device and a cartridge.

EFFECT: enabling replacement of the aerosol-forming substrate without replacement and removal of the cartridge.

15 cl, 6 dwg

Description

The present invention relates to a cartridge for use with an aerosol generating device. The present invention also relates to an aerosol generating system.

In the technical field to which the present invention pertains, aerosol generating devices are known, which are capable of generating an aerosol from an aerosol-forming substrate, such as a tobacco-containing substrate. Such known devices can generate an aerosol from a substrate by supplying heat to the substrate, rather than by burning the substrate. The aerosol-forming substrate can be present as a component of an aerosol-generating article, wherein the article is physically separated from the aerosol-generating device. In use, a cartridge can hold the aerosol-generating article, and the aerosol-generating device can engage with the cartridge. In use, the device can provide power to ensure heat transfer from the heat source to the aerosol-forming substrate of the aerosol-generating article. During use of such known aerosol generating devices and aerosol generating articles, volatile compounds are released from an aerosol forming substrate by heat transfer from a heat source and are captured by air drawn through the aerosol generating article. As the released compounds cool, they condense to form an aerosol that is inhaled by a consumer. The present invention relates to providing an improved cartridge for use with an aerosol generating device.

During use of some aerosol generating systems, cartridges of these systems may reach temperatures at which they become uncomfortably warm to the touch. The present invention also relates to reducing problems associated with the user's touching a cartridge that may be uncomfortably warm to the touch.

According to the present invention, a cartridge is provided for use with an aerosol generating device. The cartridge may be configured to engage with the device and to detach from it. That is, the cartridge may be configured to reversibly or detachably engage with the device. The cartridge may comprise a mouthpiece. The cartridge may comprise a housing. The housing may comprise a current-receiving (susceptor) material. The housing may define a cavity for receiving an aerosol-forming substrate or a consumable article containing an aerosol-forming substrate. The cartridge may comprise an ejector. A portion of the ejector may be configured to slide in the cavity. A portion of the ejector may be configured to slide in the cavity in order to eject the aerosol-forming substrate or the consumable article from the cavity.

According to the first aspect of the present invention, a cartridge is provided for use with an aerosol-generating device. The cartridge is designed to be engaged with the device and detached from it. The cartridge comprises a mouthpiece and a housing. The housing comprises a current-receiving material and defines a cavity for receiving an aerosol-forming substrate or a consumable product containing an aerosol-forming substrate. The cartridge also comprises an ejector, wherein a part of the ejector is designed to slide in the cavity in order to push the aerosol-forming substrate or the consumable product out of the cavity.

In use, a user may insert a consumable containing an aerosol-forming substrate into a cavity of a cartridge. The user may then engage the cartridge with an aerosol-generating device. The device may then inductively heat the current-receiving material of the housing to form an aerosol from the aerosol-forming substrate. While heating occurs, the user may draw on the mouthpiece of the cartridge to draw the resulting aerosol into their mouth or lungs.

Preferably, a cartridge containing a mouthpiece may mean that the user does not have to puff directly on the aerosol-generating product or the disposable product containing the aerosol-generating substrate. This may be preferable for some users.

Advantageously, the cartridge housing containing the current collecting material may mean that the aerosol forming substrate may be inductively heated. This may be preferable to resistive heating, as in some cases resistive heating is less efficient, as the electrical energy is spent on heating the electrical contacts rather than the resistive heating element.

Advantageously, the ejector may allow a user to eject a consumable article containing an aerosol-forming substrate without having to touch the consumable article.

In the context of this document, the term "aerosol" refers to a dispersion of solid particles or liquid droplets, or a combination of solid particles and liquid droplets, in a gas. An aerosol may be visible or invisible. An aerosol may contain vapors of substances that are normally liquid or solid at room temperature, as well as solid particles or liquid droplets, or a combination of solid particles and liquid droplets.

In the context of this document, the term "aerosol-forming substrate" refers to a substrate capable of releasing volatile compounds that can form an aerosol. The volatile compounds can be released by heating or burning the aerosol-forming substrate.

The aerosol-forming substrate may be a solid aerosol-forming substrate. The solid aerosol-forming substrate may comprise one or more of powder, granules, pellets, grains, thin tubes, strips or sheets containing one or more of grass leaf, tobacco leaf, tobacco ribs, expanded tobacco and homogenized tobacco.

The aerosol-forming substrate may contain solid and liquid components. The aerosol-forming substrate may be a liquid, gel, or paste-like aerosol-forming substrate.

The aerosol-forming substrate may be provided on or embedded in a heat-stable carrier. The carrier may be in the form of a powder, granules, beads, grains, thin tubes, strips or sheets. A solid aerosol-forming substrate may be applied to the surface of the carrier in the form of, for example, a sheet, foam, gel or suspension. The aerosol-forming substrate may be applied to the entire surface of the carrier or, alternatively, may be applied in a pattern to provide non-uniform delivery of the flavouring substance during use.

The aerosol-forming substrate may contain nicotine. The aerosol-forming substrate may contain a plant-based material. The aerosol-forming substrate may contain homogenized plant-based material. The aerosol-forming substrate may contain tobacco. The aerosol-forming substrate may contain a tobacco-containing material. The tobacco-containing material may contain volatile tobacco flavor compounds. These compounds may be released from the aerosol-forming substrate upon heating. The aerosol-forming substrate may contain homogenized tobacco material. The aerosol-forming substrate may contain other additives and ingredients, such as flavoring agents.

The aerosol-forming substrate may comprise homogenized tobacco material. In the context of this document, the term "homogenized tobacco material" refers to a material formed by agglomeration of loose tobacco.

The aerosol-generating substrate may comprise an assembled sheet of homogenized tobacco material. As used herein, the term "sheet" refers to a layered element having a width and length substantially greater than its thickness. As used herein, the term "assembled" is used to describe a sheet that is rolled, folded, or otherwise compressed or narrowed substantially transversely to the longitudinal axis of the aerosol-generating article.

The aerosol-forming substrate may comprise an aerosol forming agent. In the context of the present document, the term "aerosol forming agent" is used to describe any suitable known compound or mixture of compounds that, when used, promote aerosol formation and that are substantially resistant to thermal degradation at the operating temperature of the aerosol-generating article. Suitable aerosol forming agents are known in the art and include, but are not limited to: polyhydric alcohols such as propylene glycol, triethylene glycol, 1,3-butanediol and glycerol; esters of polyhydric alcohols such as glycerol mono-, di- or triacetate; and aliphatic esters of mono-, di- or polycarboxylic acids such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol forming agents are polyhydric alcohols or mixtures thereof, such as propylene glycol, triethylene glycol, 1,3-butanediol and most preferably glycerol.

The aerosol-forming substrate may comprise a single aerosol-forming substance. For example, the aerosol-forming substrate may comprise glycerin as the sole aerosol-forming substance or propylene glycol as the sole aerosol-forming substance. Alternatively, the aerosol-forming substrate may comprise a combination of two or more aerosol-forming substances. For example, the aerosol-forming component of the aerosol-forming substrate may be glycerin and propylene glycol.

In the context of this document, the term "aerosol-generating article" or "consumable article" refers to an article that contains or consists of an aerosol-generating substrate. The aerosol-generating article or consumable article may contain components in addition to the aerosol-generating substrate. The aerosol-generating article or consumable article may be a smoking article. The aerosol-generating article or consumable article may generate an aerosol that is directly inhaled into the lungs of the user through the user's mouth. The aerosol-generating article or consumable article may be a smoking article that generates an aerosol containing nicotine that is directly inhaled into the lungs of the user through the user's mouth. The aerosol-generating article or consumable article may be in the form of a rod.

As used herein, the term "aerosol generating device" refers to a device that interacts with an aerosol-forming substrate to generate an aerosol. The aerosol generating device may interact with an aerosol-generating article that contains an aerosol-forming substrate, or with a cartridge that holds an aerosol-forming substrate or an aerosol-generating article to generate an aerosol. The aerosol generating device may heat the aerosol-forming substrate to promote the release of volatile compounds from the substrate. The aerosol generating device may be an electrical aerosol generating device. The aerosol generating device may comprise a nebulizer, such as an electrical heater, for heating the aerosol-forming substrate to form an aerosol.

In the context of this document, the terms "axial" and "longitudinal" are used to describe the direction between a downstream, near, or mouthpiece end of a component, such as an aerosol generating device, cartridge, or aerosol generating article, and the opposite, upstream, or distal end of the component.

In the context of this document, the terms "radial" and "transverse" are used to describe the direction perpendicular to the longitudinal direction.

In the context of this document, the term "length" is used to describe the maximum longitudinal dimension between the distal or upstream end of a component, such as an aerosol generating device, cartridge, or aerosol generating article, and the opposite downstream or distal end of the component.

In the context of this document, the term "width" is used to describe the transverse dimension of a component such as an aerosol generating device, cartridge, or aerosol generating article.

In the context of this document, the term "diameter" is used to describe the maximum transverse dimension of a component such as an aerosol generating device, cartridge, or aerosol generating article.

In the context of this document, the term "thermally activated locking mechanism" is used to refer to a locking mechanism that is activated automatically in response to a change in temperature, such as an increase in temperature.

The cartridge housing may define an axial air inlet. The axial air inlet may provide air flow into the housing in the axial direction. The housing may define an air outlet. The air outlet may be located downstream of the axial air inlet. The air outlet may be an axial air outlet. The air outlet may provide the ability to flow air out of the housing in the axial direction. The housing may define a first air flow path from the axial air inlet to the air outlet. Advantageously, the axial air inlet and the axial air outlet may provide the ability to use the cartridge with consumables configured to allow an axial air flow to pass through them, wherein, for example, the consumable has an impermeable barrier around the circumference, but has a permeable barrier or does not have a barrier at its axial ends.

The cartridge housing may have a near or downstream end and a far or upstream end. The housing may be or may comprise a partially or completely hollow tube. The tube may be defined between the near or downstream end and the far or upstream end. The tube may define a cavity for containing an aerosol-forming substrate.

The cavity of the cartridge may be suitable for housing a consumable product. As stated above, the term "consumable product" may refer to an article that contains or consists of an aerosol-forming substrate. The cavity may be suitable for housing multiple consumable products. Advantageously, the ability to hold multiple consumable products may allow the user to personalize their experience by using multiple consumable products with different scents.

Each consumable product may have a length extending in the axial direction between an upstream end and a downstream end. Each consumable product may have a diameter extending in the transverse direction. The cavity may be suitable for accommodating several consumable products, so that the consumable products are located inside the cavity in the axial direction. The cavity may be suitable for accommodating several consumable products, so that the upstream end of the first consumable product located in the cavity is located adjacent to the downstream end of the second consumable product located in the cavity, and optionally abuts against it. In addition, the upstream end of the second consumable product located in the cavity may be located adjacent to the downstream end of the third consumable product located in the cavity, and optionally abuts against it. The cavity may be suitable for accommodating several consumable products, so that the first consumable product located in the cavity is located completely downstream of the second consumable product located in the cavity. In addition, the second consumable placed in the cavity may be located entirely downstream of the third consumable placed in the cavity. The advantage of such a cavity arrangement may allow the user to personalize their experience by using different orders of consumables with different scents in the cavity.

The cavity may be configured to securely hold one or more consumables placed in the cavity. For example, the cavity may be sized to securely hold one or more consumables placed in the cavity using a press fit or a friction fit. Advantageously, this may eliminate the need for a separate mechanism to securely hold the consumables in the cavity.

The cartridge housing may define a first radial air inlet. The first radial air inlet may be located upstream of the air outlet. The first radial air inlet may be located downstream of the axial air inlet. A second air flow path may be defined from the first radial air inlet to the air outlet. The first radial air inlet may provide air entry into the housing in a radial direction.

The cartridge housing may define a second radial air inlet. The second radial air inlet may be located upstream of the air outlet. The second radial air inlet may be located at a distance in the axial direction along the housing from the first radial air inlet. The second radial air inlet may be located further downstream of the first radial air inlet. A third air flow path may be defined from the second radial air inlet to the air outlet. The second radial air inlet may provide air supply to the housing in the radial direction.

The cartridge housing may define a third radial air inlet. The third radial air inlet may be located upstream of the air outlet. The third radial air inlet may be located at a distance in the axial direction along the housing from the first and second radial air inlets. The third radial air inlet may be located further downstream of the second radial air inlet. A fourth air flow path may be defined from the third radial air inlet to the air outlet. The third radial air inlet may provide air supply to the housing in the radial direction.

The first radial air inlet may be arranged so as to be aligned with the first consumable article placed in the cavity. In use, air may pass through the first radial air inlet and then through the first consumable article, for example, through a permeable outer or circumferential portion of the first consumable article. Then the air may pass in the axial direction through the body. When the second consumable article is placed in the cavity, the air may pass in the axial direction through the second consumable article after passing through the first consumable article. When the third consumable article is also placed in the cavity, the air may pass in the axial direction through the third consumable article after passing through the second consumable article.

The second radial air inlet may be arranged to be aligned with the second consumable placed in the cavity. In use, air may pass through the second radial air inlet and then through the second consumable, for example, through a permeable outer or circumferential portion of the second consumable. The air may then pass axially through the housing. When the third consumable is also placed in the cavity, the air may pass axially through the third consumable after passing through the second consumable.

The third radial air inlet may be arranged to be aligned with the third consumable placed in the cavity. In use, air may pass through the third radial air inlet and then through the third consumable, such as through a permeable outer or circumferential portion of the third consumable. The air may then pass axially through the housing.

Preferably, the use of radial air inlets in this way can improve the user experience, since fresh air can pass through each of the consumables. In contrast, with only an axial air inlet, the air passing through the second consumable may not be fresh, since this air has already passed through the first consumable. In this context, the term "fresh air" is used to refer to air that has not yet passed through the consumable.

The cartridge housing may define both an axial air inlet and one or more radial air inlets. For example, the housing may define an axial air inlet and any one, two or all of the first, second and third radial air inlets. Any one, two or all of the first, second and third radial air inlets may be located downstream of the axial air inlet. The air outlet may be located downstream of the axial air inlet and the radial air inlet(s). The air flow path from the axial air inlet to the air outlet may merge with any one, two or all of the air flow paths from the first, second or third air inlet to the air outlet. Advantageously, the inclusion of an axial air inlet and a radial air inlet may reduce the draw resistance of the cartridge by providing a higher air flow rate into the housing. Advantageously, this can also provide the ability to use the cartridge with a wide variety of consumables. This is because the cartridge can be suitable for use with consumables designed for axial air flow through it and consumables designed for radial air flow through it.

Any one, two or all of the first, second and third radial air inlets may be formed by an air-permeable portion of the housing. Thus, the first radial air inlet may be formed by the first air-permeable portion of the housing. The second radial air inlet may be formed by the second air-permeable portion of the housing. The third radial air inlet may be formed by the third air-permeable portion of the housing.

Any one, two, or all of the first, second, and third air-permeable body portions may comprise one or more of a porous material and a plurality of openings, such as a plurality of slits.

Any one, two or all of the first, second and third air-permeable portions of the housing may have a porosity of from 40% to 95%, or from 50% to 90%, or from 60% to 80%. In this context, the term "porosity" may be used as a measure of the free space through the wall of the housing by area. Thus, if the air-permeable portion comprises a plurality of openings surrounded by a solid material, the percentage of the cross-sectional area of the air-permeable portion formed by the openings may be from 40% to 95%, or from 50% to 90%, or from 60% to 80% (with the remaining 60% to 5%, or from 50% to 10%, or from 40% to 20% formed by a solid material). Advantageously, these porosity ranges can provide an optimal combination of a number of factors, including the ability to pass an appropriate amount of air through the cartridge, ensuring an appropriate level of heating of the current-collecting material of the housing near the air-permeable parts, ensuring optimal resistance to tightening of the cartridge and maintaining the structural integrity of the housing.

The first air-permeable part may comprise a first annular or substantially annular air-permeable strip in the body. The first annular air-permeable strip may comprise a first plurality of openings in the body.

The second air-permeable part may comprise a second annular or substantially annular air-permeable strip in the body. The second annular air-permeable strip may comprise a second plurality of openings in the body. The second annular air-permeable strip may be located at a distance in the axial direction along the body from the first annular air-permeable strip.

The third air-permeable part may comprise a third annular or substantially annular air-permeable strip in the body. The third annular air-permeable strip may comprise a third plurality of openings in the body. The third annular air-permeable strip may be located at a distance in the axial direction along the body from the first and second annular air-permeable strips.

The first breathable strip may have a first air flow permeability. The second breathable strip may have a second air flow permeability. The third breathable strip may have a third air flow permeability. The first permeability may differ from the second permeability. The first permeability may differ from the third permeability. The second permeability may differ from the third permeability. The first breathable strip, the second breathable strip, and the third breathable strip may have different permeability.

Advantageously, these different permeabilities can allow the user to customize their experience by deciding where to place the consumables in the cartridge based on the expected air flow rate through the air permeable strips. For example, if the user desires to experience the maximum aroma present in a particular consumable, that consumable can be placed in the cavity in such a way as to align with the air permeable strip having the highest permeability.

Any, one, two or all of the first, second and third annular air-permeable strips of the body may occupy at least 50, 60, 70, 80 or 90% of the circumference of the body. Thus, it should be understood that the annular air-permeable strips may, but do not necessarily, extend around the entire circumference or periphery of the body.

The cartridge can be configured to be used with an aerosol generating device configured to inductively heat the current-receiving material of the cartridge. For example, the cartridge can be configured to be used with an aerosol generating device comprising an inductor, such as an induction coil. The aerosol generating device can comprise a power source. The power source can be configured to pass an alternating current through the inductor so that the inductor generates a fluctuating electromagnetic field. The device can be configured so that the cartridge can be within the fluctuating electromagnetic field. The alternating current can be a high-frequency alternating current. This, in turn, can lead to the occurrence of eddy currents and hysteresis losses in the current-receiving material. This can lead to heating of the current-receiving material. Thus, the power source and the inductor can be configured to inductively heat the current-receiving material.

The current-collecting (suspender) material may be or may comprise any material that can be inductively heated to a temperature sufficient to generate an aerosol from an aerosol-forming substrate. Preferred current-collecting materials may be heated to a temperature above 50, 100, 150, 200, 250, 300, 350 or 400 degrees Celsius. Preferred current-collecting materials may comprise a metal, carbon or both a metal and carbon. A preferred current-collecting material may comprise a ferromagnetic material, such as ferritic cast iron or ferromagnetic steel, or stainless steel. A suitable current-collecting material may be or may comprise one or more of graphite, molybdenum, silicon carbide, stainless steel, niobium and aluminum. Preferred current-collecting materials may comprise or be formed from 400 series stainless steel, such as 410 series stainless steel, or 420 series stainless steel, or 430 series stainless steel. A particularly preferred current-collecting material may be a ferromagnetic alloy, such as a ferromagnetic alloy that is not subject to corrosion under the operating conditions of the cartridge or system. Different materials will dissipate different amounts of energy when they are located in electromagnetic fields having similar values of frequency and field strength. Thus, the parameters of the current-collecting material, such as the type of material and the size, can be varied to provide a desired power dissipation within a known electromagnetic field.

The current-collecting material may comprise more than 50, 60, 70 or 80% of the body by weight. The body may consist of or be formed from the current-collecting material. A predominantly larger proportion of the body formed from the current-collecting material may result in greater induction heating of the body in an induction-heated aerosol-generating system.

The housing may comprise a housing component. The current-collecting material may be located on the surface of the housing component, for example, on the inner surface of the housing component. The current-collecting material may be a coating applied to the surface of the housing component, for example, on the inner surface of the housing component. The current-collecting material may define at least a portion of the cavity. Advantageously, the current-collecting material located on the inner surface of the housing component may result in greater heating of the consumable placed in the cavity during use.

The current-receiving material may contact the consumable or aerosol-forming substrate in the cavity during use. This may advantageously result in more efficient heat transfer from the current-receiving material to the consumable or aerosol-forming substrate during use.

The cavity may have a length of 20 mm to 100 mm. The cavity may have a length of at least 20, 30, 40 or 50 millimeters. The cavity may have a length of less than 100, 80 or 60 millimeters. The cavity may have a width of 3 mm to 30 mm. The cavity may have a width of at least 3, 5 or 10 millimeters. The cavity may have a width of less than 30, 20 or 15 millimeters. The cavity may have a substantially cylindrical shape, such as a substantially regular cylindrical shape. The cavity may have a circular cross-section, or an oval cross-section, or a polygonal cross-section.

The mouthpiece may be reusable. The mouthpiece may contain or be formed from a polymeric material. The cartridge may be disposable. Advantageously, a reusable cartridge may be more environmentally friendly than a disposable cartridge.

The air flow path can be determined through the mouthpiece. When in use, the air can flow through the body and then through the mouthpiece.

The mouthpiece may comprise a restrictive zone, wherein the restrictive zone restricts the flow of air through the mouthpiece during use.

The mouthpiece may comprise an expansion zone located downstream of the constriction zone, wherein the expansion zone provides for expansion of the air flow in the mouthpiece during use.

The mouthpiece may comprise a second constriction zone downstream of the expansion zone, wherein the second constriction zone restricts the flow of air through the mouthpiece during use.

The mouthpiece may comprise a second expansion zone downstream of the second constriction zone, wherein the second expansion zone provides for expansion of the air flow in the mouthpiece upon use.

Advantageously, the use of one or more constriction zones, or one or more expansion zones, or one or more constriction zones and one or more expansion zones in the mouthpiece can be used to improve mixing of the aerosol before delivery to the user. In addition, the use of one or more constriction or expansion zones in the mouthpiece can be used to cool the aerosol before delivery to the user.

The ejector may be connected to the cartridge housing. The ejector may be configured to slide in the axial direction relative to the housing. The ejector may be configured to slide axially relative to the housing from a first axial position on the housing to a second axial position on the housing. The first axial position may be closer to the mouthpiece than the second axial position. The ejector may be configured to slide from the first axial position to the second axial position to eject the aerosol-forming substrate from the cavity.

The ejector may be configured to be temporarily fixed in one or each of the first axial position and the second axial position. For example, a projection on the ejector may snap into a corresponding first recess on the housing in the first axial position. Similarly, a projection on the ejector may snap into a corresponding second recess on the housing in the second axial position. Advantageously, this may prevent the ejector from sliding freely under the action of gravity.

The ejector may be biased toward one of the first axial position and the second axial position by means of a biasing means, such as a spring.

The second part of the ejector may be located outside the housing. The ejector may comprise a button-shaped part. The button-shaped part may be located outside the housing. When used, the user may operate the button-shaped part to move the ejector relative to the housing. This may advantageously simplify the use of the ejector.

In use, the consumable product inserted into the cavity may be adjacent to the ejector. For example, the downstream end of the consumable product inserted into the cavity may be adjacent to the ejector. The ejector may serve as a stop for the consumable product inserted into the cavity. The ejector may serve as a stop in the first axial position. In this sense, the ejector may be advantageously used for positioning the consumable product placed in the cavity. For example, the ejector may be used for positioning the consumable product so that the consumable product is aligned with a radial air inlet, such as a first radial air inlet in the housing, or an air-permeable strip, such as a first annular air-permeable strip in the housing.

The housing may comprise a groove that extends axially along the housing. The groove may have a width of at least 0.5, 1 or 1.5 millimeters. The groove may have a length of at least 20, 30 or 40 millimeters. The groove may extend along at least 30, 50 or 70% of the length of the housing. The groove may allow the user to determine whether the aerosol-forming substrate can be located within the cavity of the housing. Advantageously, this may allow the user to determine how many consumables, if any, are placed in the cavity without the need for an ejector.

The ejector may be connected to the groove. The ejector may be designed to slide in the axial direction along the groove, for example, between the first axial position and the second axial position, in order to eject the consumable placed in the cavity from the housing.

The cartridge may contain a mechanical locking component of a heat-activated mechanical locking mechanism. The locking mechanism may not require any electronics to operate. The mechanical locking component may be activated and deactivated based on the temperature of a portion of the cartridge. This may advantageously provide a reliable locking mechanism.

When the cartridge is engaged with the aerosol generating device, the locking mechanism may be configured to prevent the cartridge from being detached from the aerosol generating device if the temperature of a portion of the locking mechanism exceeds a predetermined temperature. Advantageously, this may prevent the user from detaching the cartridge from the aerosol generating device while a portion of the cartridge is hot.

The blocking component may comprise a thermal expansion component, wherein the thermal expansion component is configured to expand or bend when heated. When the cartridge is engaged with the aerosol generating device, the thermal expansion component may be configured to expand or bend when heated to engage with the engaging component of the aerosol generating device to prevent the cartridge from being detached from the aerosol generating device. Advantageously, this may prevent the user from detaching the cartridge from the aerosol generating device while a portion of the cartridge is hot.

When the cartridge is engaged with the aerosol generating device, the thermal expansion component may be configured to expand or flex during use of the aerosol generating device to generate an aerosol.

According to a second aspect of the present invention, there is provided a system generating an aerosol. The system comprises an aerosol generating device and a cartridge. The cartridge may be a cartridge as described above in connection with the first aspect of the present invention. Thus, any features described above with respect to the cartridge according to the first aspect may be applicable to the cartridge of the system according to the second aspect. Likewise, any features described below with respect to the cartridge of the system according to the second aspect may be applicable to the cartridge according to the first aspect.

The aerosol generating device may comprise an air inlet. When the cartridge is engaged with the aerosol generating device, an air flow path may be formed between the air inlet of the device and any one, two, three or all of the air inlets of the cartridge. Thus, in use, air may pass through the air inlet of the device and then through one or more air inlets of the cartridge.

The aerosol generating device may be configured to inductively heat the current-receiving material of the cartridge.

The aerosol generating device may comprise an inductor, such as an induction coil. The aerosol generating device may comprise a power source. The power source may be configured to pass an alternating current through the inductor such that the inductor generates a fluctuating or oscillating electromagnetic field.

Alternating current may have any suitable frequency. Alternating current may be high frequency alternating current. Alternating current may have a frequency of 100 kilohertz (kHz) to 30 megahertz (MHz). When the inductor is a tubular induction coil, the alternating current may have a frequency of 500 kilohertz (kHz) to 30 megahertz (MHz). If the induction coil is a flat induction coil, the alternating current may have a frequency of 100 kilohertz (kHz) to 1 megahertz (MHz).

During use, the current-receiving material of the cartridge may be located within the electromagnetic field generated by the inductor or otherwise affected by it. This may result in eddy currents and hysteresis losses in the current-receiving material. This may result in heating of the current-receiving material. Thus, the power source and the inductor may be designed to inductively heat the current-receiving material. This may result in heating of the consumable located in the cavity during use, which may result in the formation of an aerosol.

The current collecting material may be or may comprise any material that can be inductively heated to a temperature sufficient to generate an aerosol from an aerosol-forming substrate. Preferred current collecting materials may be heated to a temperature above 50, 100, 150, 200, 250, 300, 350 or 400 degrees Celsius. Preferred current collecting materials may comprise a metal, carbon or both a metal and carbon. A preferred current collecting material may comprise a ferromagnetic material, such as ferritic cast iron or ferromagnetic steel, or stainless steel. A suitable current collecting element may comprise or may be one or more of graphite, molybdenum, silicon carbide, stainless steel, niobium and aluminum. Preferred current-collecting materials may comprise or be formed from 400 series stainless steel, such as 410 series stainless steel, or 420 series stainless steel, or 430 series stainless steel. Different materials will dissipate different amounts of energy when they are located in electromagnetic fields having similar frequency and field strength values. Thus, the parameters of the current-collecting material, such as the type of material and the size, can be varied to provide a desired power dissipation within a known electromagnetic field.

Advantageously, in an aerosol generating system using induction heating, there is no need to form electrical contacts between the electrically resistive heating element and the aerosol generating device. In addition, induction heating can provide improved energy conversion compared to resistive heating. This is due to the fact that induction heating may not have power losses associated with electrical resistance in the connections between the electrically resistive heating element and the power source.

The aerosol generating device may comprise a chamber for accommodating a cartridge. The chamber may extend axially so as to accommodate at least a portion of the length of the cartridge body.

The device may comprise a first induction coil. The first induction coil may be located around the first part of the chamber or adjacent to it. The aerosol generating device may comprise a second induction coil. The second induction coil may be located around or adjacent to the second part of the chamber. The second part of the chamber may be located at a distance from the first part in the axial direction along the chamber. Advantageously, the use of two induction coils located at a distance from each other in the axial direction along the chamber may provide uneven heating of the current-receiving material(s) of the cartridge. For example, the first and second induction coils may have different coil thickness, coil cross-sectional shape, coil cross-sectional area, or different radius of curvature forming the coil, or different alternating currents may be supplied to the first and second induction coils. Adjustment of these variables may advantageously provide adjustment of the heating of different parts of the cartridge.

As mentioned above in connection with the cartridge according to the first aspect, the cavity of the cartridge may be suitable for accommodating and receiving the first consumable and the second consumable. The cartridge body may comprise a first portion. The cartridge body may comprise a second portion. The first consumable may be configured to be located in the first portion of the cartridge body. The second consumable may be configured to be located in the second portion of the cartridge body. The first portion of the cartridge body may comprise a first radial air inlet or a first airtight strip. The second portion of the cartridge body may comprise a second radial air inlet or a second airtight strip.

When the cartridge is placed in the chamber, the first part of the cartridge body may be aligned with the first part of the chamber. When the cartridge is placed in the chamber of the device or when the cartridge is otherwise engaged with the device, the first induction coil may be aligned with the first part of the cartridge body and/or the first consumable article placed in the cavity.

When the cartridge is placed in the chamber, the second part of the cartridge body may be aligned with the second part of the chamber. When the cartridge is placed in the chamber of the device or when the cartridge is otherwise engaged with the device, the second coil may be aligned with the second part of the cartridge body and/or the second consumable article placed in the cavity.

Advantageously, this may allow the heating of the first and second consumables to be controlled separately. For example, this may allow one of the first and second consumables to be heated to a higher temperature than the other consumable by heating the current-receiving material(s) around this consumable to a higher temperature than the current-receiving material(s) around the other consumable.

The second induction coil may be located around or adjacent to the first part of the chamber. The second induction coil may be located at a distance in the radial direction from the first induction coil. The second induction coil may at least partially surround or at least partially be surrounded by the first induction coil.

The first induction coil and the second induction coil can operate independently of each other. In use, the device can pass the first alternating current through the first induction coil simultaneously with passing the second alternating current, different from the first alternating current, through the second induction coil. The first induction coil can be electrically connected to the first power source. The second induction coil can be electrically connected to the second power source. The second power source can differ from the first power source. This can advantageously ensure independent operation of the first and second induction coils.

According to the present invention, there is provided a system comprising a cartridge and a consumable product or a set of consumable products, such as any one, two or all of the first, second and third consumable products described above in connection with the first aspect. The cartridge may comprise any of the features of the cartridge according to the first aspect. The cartridge may be a cartridge according to the first aspect.

The cartridge may be configured to hold at least two consumables, for example, by arranging said consumables in a cavity of the cartridge. The cartridge may be configured to hold the first consumable, for example, by friction fit, such that the first consumable is aligned with the first radial air inlet, as described above. The cartridge may be configured to hold the second consumable, for example, by friction fit, such that the second consumable is aligned with the second radial air inlet, as described above. The cartridge may be configured to hold the third consumable, for example, by friction fit, such that the third consumable is aligned with the third radial air inlet, as described above.

According to the present invention, there is provided an aerosol generating system. The aerosol generating system may comprise any of the features described above with respect to the aerosol generating system. For example, this system may comprise any of the features of the system according to the second aspect. The system may comprise an aerosol generating device. The aerosol generating device may comprise any of the features described above with respect to the aerosol generating device. The system may comprise a cartridge configured to engage with the aerosol generating device and to detach from it. The cartridge may comprise any of the features described above with respect to the cartridge. For example, this cartridge comprises any of the features of the cartridge according to the first aspect. The system may comprise a locking mechanism. The locking mechanism may be a heat-activated locking mechanism. The locking mechanism may be a mechanical locking mechanism. The locking mechanism may be a heat-activated mechanical locking mechanism. When the cartridge is engaged with the device, the locking mechanism may be configured to prevent the cartridge from being disconnected from the aerosol generating device. When the cartridge is engaged with the device, the locking mechanism may be configured to prevent the cartridge from being disconnected from the aerosol generating device if the temperature of a portion of the locking mechanism exceeds a predetermined temperature.

According to the third aspect of the present invention, an aerosol generating system is provided. The system comprises an aerosol generating device and a cartridge configured to engage with the aerosol generating device and to detach from it. The system comprises a heat-activated mechanical locking mechanism. When the cartridge is engaged with the device, the locking mechanism is configured to prevent the cartridge from detaching from the aerosol generating device if the temperature of a part of the locking mechanism exceeds a predetermined temperature.

Advantageously, the locking mechanism may prevent or at least hinder the user from detaching the cartridge from the aerosol generating device while a portion of the cartridge is still hot. This may reduce the likelihood of the user touching a portion of the cartridge that may be uncomfortably hot to the touch.

Predominantly, a locking mechanism that is a heat-activated locking mechanism may mean that the locking mechanism is activated automatically in response to heat.

All the features described above with respect to the aerosol generating system may be applicable to the aerosol generating system according to the third aspect. For example, the system according to the third aspect may comprise any of the features of the system according to the second aspect. All the features described above with respect to the aerosol generating device may be applicable to the aerosol generating device according to the third aspect. All the features described above with respect to the cartridge may be applicable to the cartridge according to the third aspect. For example, the cartridge according to the third aspect may comprise any of the features of the cartridge according to the first aspect.

The locking mechanism may not require electricity to operate. The locking mechanism may not contain any electrical components. The locking mechanism may consist of non-electrical components. This may advantageously result in a more reliable locking mechanism.

The locking mechanism may comprise a thermal expansion component. The thermal expansion component may be configured to expand or bend when heated. When the cartridge is engaged with the aerosol generating device, the thermal expansion component may be heated during use of the aerosol generating device. The thermal expansion component may be configured to expand or bend when heated to engage with the engaging component. When the cartridge is engaged with the aerosol generating device, the thermal expansion component may be configured to expand or bend when heated to engage with the engaging component in such a way as to prevent the cartridge from being detached from the aerosol generating device. When the cartridge is engaged with the aerosol generating device, the thermal expansion component may be configured to be heated during use of the aerosol generating device in such a way as to expand or bend to engage with the engaging component and prevent the cartridge from being detached from the aerosol generating device.

When the cartridge is engaged with the aerosol generating device, the thermal expansion component may be configured to expand or bend at least 0.1, 0.5, 1, 2 or 3 mm in a given direction when heated during use of the aerosol generating device to generate an aerosol. Advantageously, this level of expansion can provide sufficient engagement between the thermal expansion component and the engaging component to prevent or greatly complicate the removal of the cartridge from the device by the user during or shortly after use of the device.

The engaging component may be a recess. The recess may be configured to accommodate at least a portion of the thermal expansion component when the thermal expansion component expands. When the cartridge is engaged with the aerosol generating device, the thermal expansion component may be configured to expand or bend when heated to protrude into or be accommodated in the recess. Advantageously, the interaction between the thermal expansion component and the recess may provide a simple and reliable way to prevent the cartridge from being detached from the aerosol generating device.

The cartridge may contain a thermal expansion component. The aerosol generating device may contain a thermal expansion component. The cartridge may contain an engaging component. The aerosol generating device may contain an engaging component.

One of the cartridge and the aerosol generating device may comprise a thermal expansion component, and the other of the cartridge and the aerosol generating device may comprise an engaging component. Thus, the cartridge may comprise a thermal expansion component, and the aerosol generating device may comprise an engaging component. Alternatively, the aerosol generating device may comprise a thermal expansion component, and the cartridge may comprise an engaging component.

If the cartridge comprises an engaging component, such as a recess, the engaging component may extend along the entire periphery of the cartridge. If the device comprises an engaging component, such as a recess, the engaging component may extend along the entire periphery of the cartridge. Advantageously, this may mean that the locking mechanism is capable of functioning when the cartridge is engaged with the device, regardless of the orientation of the cartridge relative to the device.

For example, the device may comprise a chamber for accommodating at least a portion of a cartridge. The engaging component may be a recess and may extend along the outer periphery of the cartridge or the inner periphery of the chamber. The thermal expansion component may be located on the other of the outer periphery of the cartridge or the inner periphery of the chamber. Thus, regardless of the orientation of the cartridge relative to the device, when the cartridge is placed in the chamber and the thermal expansion component is heated, the thermal expansion component may engage with the engaging component in such a way as to prevent the cartridge from being detached from the device.

The cartridge and device may be configured such that the cartridge engages with the device in only one specific orientation or in one of a plurality of specific orientations. For example, the cartridge and the chamber of the device may be shaped or "fixed" such that the cartridge can be placed in the chamber in only one specific orientation or in one of a plurality of specific orientations.

When the cartridge is engaged with the aerosol generating device, the thermal expansion component may be configured to expand during use of the aerosol generating system to generate an aerosol. Advantageously, this may result in the locking mechanism preventing the cartridge from being detached from the device during or shortly after use of the device, when the cartridge is still hot after use.

When the cartridge is engaged with the aerosol generating device, the locking mechanism may be configured to prevent the cartridge from being disconnected from the aerosol generating device if the temperature of a portion of the locking mechanism exceeds a predetermined temperature. The predetermined temperature may be at least 50, 60 or 65 degrees Celsius. The predetermined temperature may be less than 90, 80 or 70 degrees Celsius. The predetermined temperature may be from 60 to 90 degrees Celsius, or from 60 to 70 degrees Celsius, or from 65 to 70 degrees Celsius. Advantageously, this may mean that the locking mechanism is activated during use of the aerosol generating system to generate an aerosol.

As described with reference to the cartridge according to the first aspect, the cartridge may be configured to inductively heat. The cartridge body may comprise a current-receiving material. The thermal expansion component may comprise a current-receiving material. The thermal expansion component may be configured to inductively heat. Advantageously, this may ensure that when the system is used to generate an aerosol, the thermal expansion component is heated to a temperature sufficient to activate the locking mechanism.

The cartridge may comprise a thermal expansion component. The cartridge housing may comprise a thermal expansion component. The thermal expansion component may be located on or in contact with the cartridge housing. The thermal expansion component may be in thermal contact with the cartridge housing. The cartridge may be designed in such a way that, when used, heat from the cartridge, such as the cartridge housing or the current-collecting material of the cartridge, is conducted to the thermal expansion component to heat the thermal expansion component. Advantageously, this may provide a reliable way to ensure that the thermal expansion component is heated each time the cartridge housing is heated. This may reduce the likelihood that the locking mechanism will not be activated when the cartridge is heated.

The thermal expansion component may comprise a current-collecting material, such as any material or combination of materials listed above with reference to the cartridge housing.

The thermal expansion component may comprise a strip of material. The strip of material may be located on the outer surface of the cartridge. The strip of material may be located on the inner surface of the chamber of the device. The strip of material may be attached to the cartridge or device at both ends. The strip of material may not be attached to the cartridge or device between the two ends. When heated, the strip of material may be configured to expand and bend or curve outward from the outer surface of the cartridge or from the inner surface of the chamber of the device. When heated, the central portion of the strip of material between the two ends may be configured to bend outward from the outer surface of the cartridge or from the inner surface of the chamber of the device. When heated, the strip of material may be configured to expand in such a way that the radius of curvature of the strip of material decreases. Advantageously, such an arrangement can maximize the expansion of the thermal expansion component in the radial direction at a given temperature increase. This can more reliably "lock" the cartridge in engagement with the device.

The strip of material may comprise a current-collecting material, such as any material or combination of materials listed above with reference to the cartridge housing. Advantageously, this may provide induction heating of the strip of material, such as during use of the system for generating an aerosol.

The thermal expansion component may comprise a material having a linear coefficient of thermal expansion at room temperature greater than 1, 2, 4, 6, 8, 10, 15, or 20 micrometers per meter per degree Kelvin.

The thermal expansion component may comprise a bimetallic portion. The bimetallic portion may comprise a first metal strip located on top of a second metal strip. The first metal strip may comprise any of the features of the material strip described above or may be it. When heated, the first metal strip may be configured to expand so as to protrude beyond the second metal strip. Advantageously, such an arrangement may maximize the expansion of the thermal expansion component at a given temperature increase.

The second metal strip may be part of the housing of the cartridge of the system. The second metal strip may comprise a current-collecting material. The second metal strip may be inductively heated during use of the aerosol generating system to generate an aerosol. The first metal strip may comprise a current-collecting material. The first metal strip may be inductively heated during use of the aerosol generating system to generate an aerosol. Advantageously, this may mean that the locking mechanism is activated during use of the aerosol generating system to generate an aerosol.

The first metal strip may be attached to the second metal strip at two ends of the first metal strip. The first metal strip may not be attached to the second metal strip between the two ends of the first metal strip. When heated, the first metal strip may be configured to expand and bend outward from the second metal strip. When heated, the central portion of the first metal strip (the portion between its two ends) may be configured to bend outward from the second metal strip. When heated, the first metal strip may be configured to expand in such a way that the radius of curvature of the central portion of the first metal strip decreases. Advantageously, such an arrangement may maximize the expansion of the thermal expansion component in the radial direction at a given temperature increase. This may more reliably "lock" the cartridge in engagement with the device.

According to the present invention, a cartridge is provided for use with an aerosol generating device. The cartridge may be configured to engage with and detach from the aerosol generating device. The cartridge may comprise a mechanical locking component of a heat-activated mechanical locking mechanism. When the cartridge is engaged with the device, the locking mechanism may be configured to prevent the cartridge from detaching from the aerosol generating device if the temperature of the locking mechanism portion exceeds a predetermined temperature.

According to a fourth aspect of the present invention, a cartridge is provided for use with an aerosol generating device, wherein the cartridge is configured to engage with the aerosol generating device and to detach from it. The cartridge comprises a mechanical locking component of a heat-activated mechanical locking mechanism, wherein, when the cartridge is engaged with the device, the locking mechanism can be configured to prevent detachment of the cartridge from the aerosol generating device if the temperature of the part of the locking mechanism exceeds a predetermined temperature.

Advantageously, the locking mechanism may prevent or at least hinder the user from detaching the cartridge from the aerosol generating device while a portion of the cartridge is still hot. This may reduce the likelihood of the user touching a portion of the cartridge that may be uncomfortably hot to the touch.

Predominantly, a locking mechanism that is a heat-activated locking mechanism may mean that the locking mechanism is activated automatically in response to heat.

All the features described above with respect to the aerosol generating device may be applicable to the aerosol generating device according to the fourth aspect. For example, the cartridge according to the fourth aspect may comprise any of the features of the cartridge according to the first aspect and any of the features of the cartridge of the system according to the third aspect. The cartridge may be a cartridge of the system according to the third aspect.

The locking mechanism may not require electricity to operate. The locking mechanism may not contain any electrical components. The locking mechanism may consist of non-electrical components. This may advantageously result in a more reliable locking mechanism.

The mechanical locking component may comprise or be a thermal expansion component. The mechanical locking component may comprise or be a catch component.

If the mechanical locking component comprises or is a thermal expansion component, the locking component may be configured to engage with the engaging component of the device, for example, as described with reference to the third aspect. If the mechanical locking component comprises or is an engaging component, the locking component may be configured to engage with the thermal expansion component of the device, for example, as described with reference to the third aspect.

According to the present invention, an aerosol generating device is provided. The device may be configured to engage with a cartridge, for example, a cartridge according to the fourth aspect, and to be detached therefrom. The device may comprise a mechanical locking component of a heat-activated mechanical locking mechanism. When the cartridge is engaged with the device, the locking mechanism may be configured to prevent the cartridge from being detached from the aerosol generating device if the temperature of the part of the locking mechanism exceeds a predetermined temperature.

According to the fifth aspect of the present invention, an aerosol generating device is provided. The device is configured to engage with a cartridge, for example, a cartridge according to the fourth aspect, and to detach from it. The device comprises a mechanical locking component of a heat-activated mechanical locking mechanism. When the cartridge is engaged with the device, the locking mechanism is configured to prevent the cartridge from detaching from the aerosol generating device if the temperature of the part of the locking mechanism exceeds a predetermined temperature.

Advantageously, the locking mechanism may prevent or at least hinder the user from detaching the cartridge from the aerosol generating device while a portion of the cartridge is still hot. This may reduce the likelihood of the user touching a portion of the cartridge that may be uncomfortably hot to the touch.

Predominantly, a locking mechanism that is a heat-activated locking mechanism may mean that the locking mechanism is activated automatically in response to heat.

All the features described above with respect to the aerosol generating device may be applicable to the aerosol generating device according to the fifth aspect. For example, the aerosol generating device according to the fifth aspect may comprise any of the features of the aerosol generating device, the system according to the third aspect. The aerosol generating device according to the fifth aspect may be the aerosol generating device, the system according to the third aspect.

The locking mechanism may not require electricity to operate. The locking mechanism may not contain any electrical components. The locking mechanism may consist of non-electrical components. This may advantageously result in a more reliable locking mechanism.

The mechanical locking component may comprise or be a thermal expansion component. The mechanical locking component may comprise or be a catch component.

If the mechanical locking component comprises or is a thermal expansion component, the locking component may be configured to engage with the engaging component of the cartridge, for example, as described with reference to the third aspect. If the mechanical locking component comprises or is an engaging component, the locking component may be configured to engage with the thermal expansion component of the cartridge, for example, as described with reference to the third aspect.

The present invention is defined in the claims. However, a non-exhaustive list of non-limiting examples is provided below. Any one or more of the features of these examples may be combined with any one or more features of another example, embodiment or aspect described herein.

Example Ex1. A cartridge for use with an aerosol generating device, wherein the cartridge is designed to be engaged with and detached from the device, wherein the cartridge comprises:

mouthpiece;

a housing containing a current-collecting material, wherein the housing defines a cavity for accommodating an aerosol-forming substrate; and

an ejector, wherein a portion of the ejector is configured to slide in the cavity to eject the aerosol-forming substrate from the cavity.

Example Ex2. A cartridge according to example Ex1, wherein the housing defines an axial air inlet and an air outlet located downstream of the axial air inlet, and wherein the first air flow path is defined from the axial air inlet to the air outlet.

Example Ex3. A cartridge according to example Ex1, wherein the housing defines a first radial air inlet and an air outlet located downstream of the radial air inlet, and wherein the second air flow path is defined from the radial air inlet to the air outlet.

Example Ex4. A cartridge according to example Ex1, wherein the housing defines an axial air inlet, a first radial air inlet and an air outlet located downstream of the axial air inlet and the first radial air inlet, wherein the first air flow path is defined from the axial air inlet to the air outlet and the second air flow path is defined from the first radial air inlet to the air outlet.

Example Ex5. A cartridge according to example Ex4, wherein the first radial air inlet is located further downstream of the axial air inlet.

Example Ex6. A cartridge according to any of examples Ex3, Ex4 or Ex5, wherein the first radial air inlet is formed by a first air-permeable portion of the housing.

Example Ex7. A cartridge according to example Ex6, wherein the first air-permeable portion of the housing comprises one or more of a porous material, a plurality of slits and a plurality of openings.

Example Ex8. A cartridge according to example Ex7, wherein the first air-permeable part of the housing has a porosity of 40% to 95%.

Example Ex9. A cartridge according to any of examples Ex3-Ex8, wherein the housing defines a second radial air inlet, wherein the second radial air inlet is located at a distance from the first radial air inlet in the axial direction along the housing.

Example Ex10. A cartridge according to any of examples Ex3-Ex9, wherein the first radial air inlet provides a first plurality of openings that form a first annular air-permeable strip in the housing.

Example Ex11. A cartridge according to example Ex9, wherein the first radial air inlet provides a first plurality of openings forming a first annular air-permeable strip in the housing, and the second radial air inlet provides a second plurality of openings forming a second annular air-permeable strip in the housing, wherein the second annular air-permeable strip is located at a distance in the axial direction along the housing from the first air-permeable strip.

Example Ex12. A cartridge according to example Ex11, wherein the first air-permeable strip has a first permeability for the air flow passing through it, and the second air-permeable strip has a second permeability for the air flow passing through it, wherein the first permeability differs from the second permeability.

Example Ex13. A cartridge according to any previous example, wherein the housing is formed from a current-collecting material.

Example Ex14. A cartridge according to any preceding example, wherein the housing comprises a housing component and the current-collecting material is a coating applied to a surface of the housing component.

Example Ex15. A cartridge according to example Ex14, wherein the coating is applied to the inner surface of the housing component, and the coating defines at least a portion of the cavity.

Example Ex16. A cartridge according to any preceding example, wherein the current collecting material contacts the aerosol-forming substrate in the cavity during use.

Example Ex17. A cartridge according to any preceding example, wherein the current collecting material is or comprises one or more of iron, steel and aluminium.

Example Ex18. A cartridge according to any preceding example, wherein the cavity has a length of at least 20, 30, 40 or 50 millimetres.

Example Ex19. A cartridge according to any previous example, wherein the cavity has a length of less than 100, 80 or 60 millimetres.

Example Ex20. A cartridge according to any preceding example, wherein the cavity has a width of at least 3, 5 or 10 millimetres.

Example Ex21. A cartridge according to any previous example, wherein the cavity has a width of less than 30, 20 or 15 millimetres.

Example Ex22. A cartridge according to any preceding example, wherein the cavity has the shape of a substantially regular cylinder.

Example Ex23. A cartridge according to any preceding example, wherein the air flow path is defined through the mouthpiece such that in use the air passes through the body and then through the mouthpiece.

Example Ex24. A cartridge according to example Ex23, wherein the mouthpiece comprises a constriction zone, wherein the constriction zone restricts the air flow through the mouthpiece during use.

Example Ex25. A cartridge according to example Ex24, wherein the mouthpiece comprises an expansion zone located further downstream of the constriction zone, wherein the expansion zone ensures expansion of the air flow in the mouthpiece during use.

Example Ex26. A cartridge according to example Ex25, wherein the mouthpiece comprises a second constriction zone located further downstream of the expansion zone, wherein the second constriction zone restricts the air flow through the mouthpiece during use.

Example Ex27. A cartridge according to example Ex26, wherein the mouthpiece comprises a second expansion zone located further downstream of the second constriction zone, wherein the second expansion zone provides for expansion of the air flow in the mouthpiece during use.

Example Ex28. A cartridge as in any previous example, with the ejector connected to the housing.

Example Ex29. A cartridge according to any previous example, wherein the ejector is configured to slide axially from a first axial position on the housing to a second axial position on the housing.

Example Ex30. A cartridge according to example Ex29, wherein the ejector is designed with the possibility of sliding from a first axial position to a second axial position for ejecting an aerosol-forming substrate from the cavity.

Example Ex31. A cartridge according to any preceding example, wherein in use the ejector acts as a stop for the aerosol-forming substrate inserted into the cavity.

Example Ex32. A cartridge according to examples Ex29 or Ex30, wherein, in use, the ejector acts as a stop in the first axial position for the aerosol-forming substrate inserted into the cavity.

Example Ex33. Cartridge according to any previous example, with the second part of the ejector located outside the housing.

Example Ex34. A cartridge according to any preceding example, wherein the housing comprises a groove which extends axially along the housing.

Example Ex35. A cartridge according to example Ex34, wherein the groove has a width of at least 0.5 millimetres.

Example Ex36. A cartridge according to examples Ex34 or Ex35, wherein the groove has a length of at least 20 millimetres.

Example Ex37. A cartridge according to any of examples Ex34-Ex36, wherein the groove extends over at least 50% of the length of the housing.

Example Ex38. A cartridge according to any of examples Ex34-Ex37, wherein the groove is designed to allow the user to determine whether the aerosol-forming substrate is located within the cavity of the housing.

Example Ex39. A cartridge according to any of the examples Ex34-Ex38, wherein the ejector is connected to the groove.

Example Ex40. A cartridge according to example Ex39, wherein the ejector is designed to slide in the axial direction along the groove.

Example Ex41. A cartridge according to any preceding example, wherein the cartridge comprises a locking component of a heat-activated mechanical locking mechanism.

Example Ex42. A cartridge according to example Ex41, wherein, when the cartridge is connected to an aerosol generating device, the locking mechanism is configured to prevent the cartridge from being disconnected from the aerosol generating device if the temperature of a part of the locking mechanism exceeds a predetermined temperature.

Example Ex43. A cartridge according to examples Ex41 or Ex42, wherein the blocking component comprises a thermal expansion component, wherein the thermal expansion component is designed to expand when heated.

Example Ex44. A cartridge according to example Ex43, wherein, when the cartridge is engaged with an aerosol generating device, the thermal expansion component is configured to expand upon heating to engage with the engaging component of the aerosol generating device to prevent the cartridge from being detached from the aerosol generating device.

Example Ex45. A cartridge according to examples Ex43 or Ex44, wherein, when the cartridge is connected to an aerosol generating device, the thermal expansion component is designed to expand during use of the aerosol generating device to generate an aerosol.

Example Ex46. An aerosol generating system comprising an aerosol generating device and a cartridge according to any preceding example.

Example Ex47. An aerosol generating system according to example Ex46, wherein the aerosol generating device is designed with the possibility of inductively heating the current-receiving material of the cartridge.

Example Ex48. An aerosol generating system according to example Ex47, wherein the aerosol generating device comprises a chamber for accommodating a cartridge and a first induction coil arranged around a first part of the chamber.

Example Ex49. An aerosol generating system according to example Ex48, wherein the aerosol generating device comprises a second induction coil.

Example Ex50. An aerosol generating system according to example Ex49, wherein the second induction coil is arranged around the second part of the chamber, wherein the second part of the chamber is at a distance from the first part in the axial direction along the chamber.

Example Ex51. An aerosol generating system according to example Ex50, wherein the cavity of the cartridge is intended for receiving and positioning a first aerosol-forming substrate and a second aerosol-forming substrate in such a way that when the cartridge is placed in the chamber of the device, the first induction coil is substantially aligned with the first aerosol-forming substrate, and the second coil is substantially aligned with the second aerosol-forming substrate.

Example Ex52. An aerosol generating system according to example Ex51, wherein the cartridge housing defines a first radial air inlet and a second radial air inlet, wherein the second radial air inlet is spaced from the radial air inlet in the axial direction along the housing in such a way that, when the cartridge is placed in the chamber of the device, the first induction coil is substantially aligned with the first radial air inlet and the second coil is substantially aligned with the second radial air inlet.

Example Ex53. An aerosol generating system according to example Ex49, wherein the second induction coil is arranged around the first part of the chamber.

Example Ex54. An aerosol generating system according to example Ex53, wherein the second induction coil is located radially at a distance from the first induction coil.

Example Ex55. An aerosol generating system according to any of the examples Ex49-Ex54, wherein the first induction coil and the second induction coil are designed to operate independently of each other, for example, the first induction coil is electrically connected to a first power source, and the second induction coil is electrically connected to a second power source, different from the first power source.

Example Ex56. An aerosol generating system comprising an aerosol generating device and a cartridge capable of being engaged with and detached from the aerosol generating device, wherein the system comprises:

heat activated mechanical locking mechanism,

wherein, when the cartridge is engaged with the device, the locking mechanism is configured to prevent the cartridge from being disconnected from the aerosol generating device if the temperature of the part of the locking mechanism exceeds a predetermined temperature.

Example Ex57. An aerosol generating system according to example Ex56, wherein the locking mechanism comprises a thermal expansion component, wherein the thermal expansion component is designed to expand upon heating.

Example Ex58. An aerosol generating system according to example Ex57, wherein, when the cartridge is engaged with the aerosol generating device, the thermal expansion component is configured to expand upon heating to engage with the engaging component to prevent the cartridge from being detached from the aerosol generating device.

Example Ex59. An aerosol generating system according to example Ex58, wherein the engaging component is a recess, and when the cartridge is engaged with the aerosol generating device, the recess is configured to accommodate a portion of the thermal expansion component therein when the thermal expansion component has expanded.

Example Ex60. An aerosol generating system according to examples Ex58 or Ex59, wherein the thermal expansion component is located on one of the cartridge and the aerosol generating device, and the engaging component is located on the other of the cartridge and the aerosol generating device.

Example Ex61. An aerosol generating system according to any of examples Ex57-Ex60, wherein, when the cartridge is engaged with the aerosol generating device, the thermal expansion component is configured to expand during use of the aerosol generating system for generating an aerosol.

Example Ex62. An aerosol generating system according to any of the examples Ex56-Ex61, wherein, when the cartridge is engaged with the aerosol generating device, the locking mechanism is configured to prevent the cartridge from being disconnected from the aerosol generating device if the temperature of a part of the locking mechanism exceeds 50, 60, 65 or 70 degrees Celsius.

Example Ex63. An aerosol generating system according to any of the examples Ex57-Ex62, wherein the thermal expansion component comprises a metal.

Example Ex64. An aerosol generating system according to example Ex63, wherein the thermal expansion component comprises a bimetallic part.

Example Ex65. An aerosol generating system according to example Ex64, wherein the bimetallic part comprises a first metal strip located on top of a second metal strip.

Example Ex66. An aerosol generating system according to example Ex65, wherein when heated the first metal strip is designed to expand so as to protrude beyond the second metal strip, and, optionally, to form or increase the size of a space between a portion of the first metal strip and the second metal strip.

Example Ex67. An aerosol generating system according to examples Ex65 or Ex66, wherein the second metal strip is part of the housing of the cartridge of the system.

Example Ex68. An aerosol generating system according to example Ex67, wherein one or both of the first metal strip and the second metal strip comprises a current-collecting material.

Example Ex69. An aerosol generating system according to example Ex68, wherein one or both of the first metal strip and the second metal strip are subjected to induction heating during use of the aerosol generating system for generating an aerosol.

Example Ex70. A cartridge for use with an aerosol generating device, wherein the cartridge is capable of being engaged with and detached from the aerosol generating device, wherein the cartridge comprises:

mechanical locking component of a heat-activated mechanical locking mechanism,

wherein, when the cartridge is engaged with the device, the locking mechanism is configured to prevent the cartridge from being disconnected from the aerosol generating device if the temperature of the part of the locking mechanism exceeds a predetermined temperature, such as 50, 60, 65 or 70 degrees Celsius.

Example Ex71. An aerosol generating device capable of being engaged with and detached from a cartridge, the device comprising:

mechanical locking component of a heat-activated mechanical locking mechanism,

wherein, when the cartridge is engaged with the device, the locking mechanism is configured to prevent the cartridge from being disconnected from the aerosol generating device if the temperature of the part of the locking mechanism exceeds a predetermined temperature, such as 50, 60, 65 or 70 degrees Celsius.

The examples will now be further described with reference to figures, where:

Fig. 1 shows a perspective view of a cartridge for use with an aerosol generating device;

Fig. 2 shows a sectional view of the cartridge according to Fig. 1.

Fig. 3 is a perspective view of an aerosol generating device for use with the cartridge of Fig. 1, the view showing the internal components of the device;

Fig. 4 is a perspective view of an aerosol generating system comprising a cartridge according to Figs. 1 and 2 and a device according to Fig. 3, the view showing the internal components of the system;

Fig. 5 shows a perspective view of the cartridge according to Fig. 1 and a cross-sectional view of a portion of the cartridge when engaged with the device according to Fig. 3 before use; and

Fig. 6 shows a perspective view of the cartridge according to Fig. 1 and a cross-sectional view of a portion of the cartridge when engaged with the device according to Fig. 3 during use.

Fig. 1 and 2 show a perspective view and a cross-sectional view, respectively, of a cartridge 100 for use with an aerosol-generating device. The cartridge 100 is configured to be engaged with and detached from the aerosol-generating device. The cartridge 100 comprises a reusable mouthpiece 102 formed from a polymeric material. The cartridge 100 also comprises a housing 104 formed from a current-receiving material. In a particular embodiment, the current-receiving material may be stainless steel. The housing 104 defines a cavity 106 for receiving a consumable article or an aerosol-forming substrate. The cartridge 100 also comprises an ejector 108. A portion of the ejector 108 is configured to slide in the cavity 106 for ejecting the aerosol-forming substrate from the cavity 106.

The cavity 106 may accommodate more than one consumable. Fig. 2 shows a cartridge 100 with a first consumable 110, a second consumable 112, and a third consumable 114 positioned in the cavity 106. Each consumable contains an aerosol-forming substrate. One or more consumables may also contain flavorings and the like.

The housing 104 is made in the form of a tube with an open end. The housing 104 contains an axial air inlet 116, a first radial air inlet 118, a second radial air inlet 120 and a third radial air inlet 122. The housing 104 also defines an axial air outlet 124, which is in fluid communication with the mouthpiece 102.

In use, the user inserts the desired consumables into the cavity 106. These consumables are held in the cavity 106 by a friction fit or a press fit. The cartridge then engages with the aerosol generating device. In particular, the cartridge 100 is placed in the chamber of the aerosol generating device, and the current-receiving material of the housing is inductively heated by the aerosol generating device when the user inhales through the mouthpiece 102. Heating the current-receiving material leads to heating of the consumables 110, 112, 114, thereby producing an aerosol. Air flows through the air inlet of the aerosol generating device, then through the axial air inlet 116 and each of the first, second and third radial air inlets 118, 120, 122 of the cartridge 100. This air passes through the consumables and carries the aerosol formed as a result of heating the consumables into the air outlet 124 of the housing 104, and then through the mouthpiece 102 for delivery to the user.

The first radial air inlet 118 is formed by the first air-permeable part of the housing. The first air-permeable part of the housing contains a plurality of openings. This plurality of openings forms the first, annular, air-permeable strip in the housing. The first air-permeable part of the housing has a porosity of approximately 50%. That is, approximately 50% of the cross-section of the first, annular, air-permeable strip is solid material of the housing, and approximately 50% are openings.

The second radial air inlet 120 is located at a distance in the axial direction along the housing 104 from the first radial air inlet 118. The second radial air inlet 120 is effectively located further downstream of the first radial air inlet 118. That is, when considering the axial path of the air flow through the housing from the axial air inlet 116 to the axial air outlet 124, the air flow through the second radial air inlet 120 joins this axial path of the air flow further downstream from the place where the air flow through the first radial air inlet 118 joins this axial path of the air flow. The second radial air opening 120 is formed by a second air-permeable portion of the housing. The second air-permeable portion of the housing comprises a plurality of slits. This plurality of slits forms a second, annular, air-permeable strip in the housing. The second breathable part of the body has a porosity of approximately 65%.

The third radial air inlet 122 is located at a distance in the axial direction along the housing 104 from the second radial air inlet 120. The third radial air inlet 122 is effectively located further downstream of the second radial air inlet 120. The third radial air inlet 122 is formed by a third air-permeable portion of the housing. The third air-permeable portion of the housing contains a plurality of slits. This plurality of slits forms a third, annular, air-permeable strip in the housing. The third air-permeable portion of the housing has a porosity of approximately 80%.

The different porosity of the first, second and third annular air-permeable strips gives the first, second and third annular air-permeable strips different permeability to the air flow passing through them during use. In this embodiment, the different permeabilities are created by means of holes and slits of different shapes, although different permeabilities can equally be created by changing the number and distance between the holes or slits in the air-permeable strips.

The housing 104 is formed from a current-collecting material. In this embodiment, the housing is formed from stainless steel, although any suitable current-collecting material may be used.

Cavity 106 has the shape of a substantially regular circular cylinder and has a length of approximately 50 millimeters and a diameter, or width, of approximately 15 millimeters.

The air flow path is defined through the mouthpiece 102 in such a way that, in use, air flows through the housing 104 and then through the mouthpiece 102. The mouthpiece comprises a first constriction zone 126, a first expansion zone 128 downstream of the first constriction zone 126, a second constriction zone 130 downstream of the first expansion zone 128 and a second expansion zone 132 downstream of the second constriction zone 130. In use, the constriction zone 126, 130 restricts the air flow through the mouthpiece 102, and the expansion zones 128, 132 provide for the expansion of the air flow in the mouthpiece 102. The constriction and expansion zones help to mix and cool the aerosol before it is delivered to the user.

The ejector 108 is connected to the housing 104. In particular, the ejector 108 is connected to a groove 134 that extends in the axial direction along the housing 104. The ejector 108 is configured to slide axially from a first axial position 136 on the housing 104, where it is shown in Figs. 1 and 2, to a second axial position 138 on the housing 104 so as to eject any consumable product(s) placed in the cavity 106 from the cavity 106 without requiring the user to touch the consumable product(s). A portion of the ejector 108 is located outside the housing 104 so that the user can easily move the ejector 108 between these positions.

As shown in Fig. 2, the ejector 108 acts as a stop in the first axial position 136 for the consumable article, first placed in the cavity 106. In this case, the consumable article, first placed in the cavity 106, is the third consumable article 114. Thus, the ejector 108 aligns the third consumable article 114 with the third radial air inlet opening 122. As seen in Fig. 2, the ejector 108 can be temporarily fixed in the first axial position 136 by means of a latching mechanism 139.

The groove 134 has a width of 1 millimeter and a length of approximately 20 millimeters. The groove 134 not only provides a path for the sliding of the ejector 108, but also allows the user to see how many consumables are inside the cavity 106 of the housing 104.

The cartridge 100 also contains a locking component 140 of a heat-activated mechanical locking mechanism.

The blocking component 140 is a thermal expansion component designed to expand when heated. In this embodiment of the invention, the blocking component 140 is a bimetallic part comprising a first steel strip located on top of a second steel strip. In this context, "on top" means that the first steel strip is located radially outside of the second steel strip. In this embodiment, the second steel strip is simply part of the housing 104 of the cartridge 100. The first steel strip is attached to the second steel strip (attached to the housing 104) only at its radial ends (the left and right sides of the strip, as shown in Fig. 1). Thus, when heated, the first steel strip is designed to expand so as to protrude or bend outward from the second steel strip so that a space is formed between the central portion of the first steel strip and the second steel strip. Since the first and second strips are formed from a current-collecting material - steel, both of these strips are capable of inductively heating, for example, during use of an aerosol generating device designed with the possibility of inductively heating the body of the cartridge 100.

The operation of the heat-activated blocking mechanism of the aerosol generating system is explained in more detail with reference to Figs. 4, 5 and 6.

Fig. 3 shows a perspective view of an aerosol generating device 200, wherein the view shows the internal components of the device 200.

The aerosol generating device 200 is configured to inductively heat the current-receiving material of the cartridge 100. The device 200 comprises a chamber 202 for accommodating the cartridge 100. The device 200 also comprises an air inlet 203 of the device, which is in fluid communication with the chamber 202.

The device 200 comprises a first induction coil 204 connected to a first power source 206 and located around a first part of the chamber 202. When the cartridge 100 is placed in the chamber 202, the first induction coil 204, the first consumable article 110 and the first radial air inlet 118 are aligned. Therefore, the first induction coil 204 is advantageously configured to heat the current-receiving material of the body 104 of the cartridge 100 around or near the first consumable article 110.

The device 200 comprises a second induction coil 208 connected to a second power source 210 and located around the second part of the chamber 202 at a distance in the axial direction along the chamber 202 from the first part of the chamber 202. When the cartridge 100 is placed in the chamber 202, the second induction coil 208, the second consumable product 112 and the second radial air inlet 120 are aligned. Therefore, the second induction coil 208 is advantageously configured to heat the current-receiving material of the body 104 of the cartridge 100 around or near the second consumable product 112.

The device 200 comprises a third induction coil 212 connected to a third power source 214 and located around a third part of the chamber 202 at a distance in the axial direction along the chamber 202 from the first and second parts of the chamber 202. When the cartridge 100 is placed in the chamber 202, the third induction coil 210, the third consumable article 114 and the third radial air inlet 122 are aligned. Therefore, the third induction coil 212 is advantageously configured to heat the current-receiving material of the body 104 of the cartridge 100 around or near the third consumable article 114.

Each of the first, second and third induction coils 204, 208, 212, connected to their own, corresponding first, second and third power sources 206, 210, 214, means that different alternating currents can be independently passed through each of these induction coils. This can provide the ability to regulate the heating of the first, second and third consumables 110, 112, 114 independently of each other.

The device 200 also comprises an engaging component 216. The engaging element 216 is an annular recess formed on the inner side of the chamber 202. The engaging component 216 is part of the heat-activated locking mechanism and is configured to engage with the locking component 140 of the cartridge 100 during use. In particular, the engaging component 216, or recess, is configured to accommodate the locking component 140 when the locking component 140 is heated to a temperature sufficient for expansion. In particular, the first steel strip of the locking component 140 is placed in the recess when heated so as to expand and bend outward from the second steel strip of the locking component 140.

Fig. 4 shows a perspective view of an aerosol generating system 300, wherein the view shows the internal components of the system 300. The system 300 shows the cartridge 100 of Figs. 1 and 2 engaged with the device 200 of Fig. 3. For clarity, the radial air inlets 118, 120, 122 and the groove 134 of the cartridge 100 are not shown in Fig. 4.

The heat-activated locking mechanism of the system 300 comprises a locking component 140 of the cartridge 100 and an engaging component 216 of the device 200. When the cartridge 100 is engaged with the device 200, as shown in Fig. 4, the locking component 140 is aligned with the engaging component 216.

In use, after the cartridge 100 is engaged with the device 200, a user interface (not shown), such as a button or a touch screen on the device, is used to activate the device 200. This causes the controller (not shown) to send a signal to each of the first, second and third power sources 206, 210, 214 to supply a high-frequency alternating current to the corresponding first, second and third induction coils 204, 208, 212. This causes a fluctuating electromagnetic field to be generated in each induction coil. This, in turn, generates eddy currents and hysteresis losses in the current-receiving material of the housing 104 of the cartridge 100. This leads to heating of the current-receiving material. Thus, the housing 104 is inductively heated. This heat is transferred to the first, second and third consumables 110, 112, 114 located in the cavity 106 of the cartridge 100, as a result of which the aerosol-forming substrate of each consumable releases volatile compounds.

While the body 104 of the cartridge is inductively heated, the user places his lips on the mouthpiece 102 of the cartridge 100 and inhales. As a result, a pressure difference is created, which causes air to flow through the air inlet 203 of the device and into the chamber 202 of the device. This air then flows through the axial air inlet 116 and the first, second and third radial air inlets 118, 120, 122 of the cartridge 100. Some of the air will also pass through the groove 134 of the cartridge 100. This air flows through the consumables and entrains the volatile compounds released by the consumables, forming an aerosol. The aerosol flows generally in an axial direction through the housing 104 of the cartridge 100 until it reaches the air outlet 124 in the housing 104 and enters the mouthpiece 102.

The aerosol then flows through the first and second constriction and expansion zones 126, 128, 130, 132 in the mouthpiece 102. Due to this, the aerosol is mixed and cooled. The aerosol is then delivered to the user, who inhales the aerosol into his mouth and lungs.

While the housing 104 of the cartridge 100 is inductively heated (to generate the aerosol), the blocking component 140, or thermal expansion component, is also heated. This occurs partly due to thermal conductivity from the housing 104 to the blocking component 140, and partly due to inductive heating of the blocking component 140 itself. This is due to the fact that in this embodiment, the blocking component 140 comprises a current-collecting material - steel. This heating of the blocking component 140 causes the blocking component 140 to expand. In particular, the first strip of steel of the blocking component 140, which is attached to the second strip of steel of the blocking component 140 at its radial ends, expands so as to bend outward from the second strip of steel of the blocking component 140. This expansion is best shown in Figs. 5 and 6.

Fig. 5 shows the cartridge 100, including the locking component 140, before heating. In the cross-section A-A, a part of the cartridge 100 and the chamber 202 of the device of Fig. 3 is shown. In this cross-section, the cartridge 100 is engaged with the device, so that a part of the cartridge 100 is received in the chamber 202 of the device. As can be seen from Fig. 5, in this position, the cartridge 100 can be easily removed from the chamber 202, since the locking component 140 is not engaged with the engaging component 216 or the annular recess of the device to prevent the cartridge 100 from being detached from the device.

Fig. 6 shows the cartridge 100, including the locking component 140, after heating as described above. In the cross-section B-B, a part of the cartridge 100 and the chamber 202 of the device of Fig. 3 is shown. In this cross-section, the cartridge 100 is engaged with the device, so that a part of the cartridge 100 is received in the chamber 202 of the device. As can be seen from Fig. 6, the locking component 140 was heated to expand and engage with the engaging component 216. In particular, the first strip of steel of the locking component 140 was bent outwardly relative to the second strip of steel or the body 104 of the cartridge 100 and was received in an annular recess in the chamber 202 of the device. The recess is annular, so that, regardless of the orientation of the cartridge 100 relative to the chamber 202, the locking component 140 engages with the engaging component 216 when the locking component 140 expands. Such engagement between the locking component 140 and the engaging component 216 prevents the cartridge 100 from being detached from the device, since the user can no longer easily pull the cartridge 100 upwards, out of the chamber 202. When the locking component 140 cools down again, it contracts so as to detach from the engaging component 216 and allow the user to easily remove the cartridge 100 from the chamber 202 again. Thus, the heat-activated locking mechanism provides a reliable way to prevent the user from touching the body 104 of the cartridge 100, while it may be uncomfortably warm to the touch.

In the embodiment described herein, the locking component 140 expands sufficiently to engage the engaging component 216 and prevent the cartridge 100 from being detached from the device at a temperature above approximately 65 degrees Celsius.

In this embodiment, the cartridge 100 comprises a locking component 140, and the device comprises an engaging component 216. However, one skilled in the art will understand that the cartridge 100 may comprise an engaging component 216, and the device may comprise a locking component 140. In this case, the locking component 140 of the device may expand to engage with a recess or opening in the cartridge 100.

For the purpose of the present description and the appended claims, except where otherwise indicated, all numbers expressing quantities, amounts, percentages, etc., are to be understood as modified in all instances by the term "about". Also, all ranges include the maximum and minimum points disclosed and include any intermediate ranges therebetween that may or may not be specifically recited herein. Therefore, in this context, the number A is to be understood as A ± 10% of A. In this context, the number A may be considered to include numerical values that are within the normal standard error for measuring the property that the number A modifies. The number A, in some instances, when used in the appended claims, may vary by the percentages listed above, provided that the amount by which A varies does not materially affect the essential and novel characteristic(s) of the claimed invention. Also, all ranges include the disclosed high and low points and include any intermediate ranges therebetween that may or may not be specifically listed herein.

Claims (18)

1. A cartridge for use with an aerosol generating device, wherein the cartridge is configured to be engaged with and detached from the device, wherein the cartridge comprises: mouthpiece; a housing containing a current-collecting material, wherein the housing defines a cavity for accommodating an aerosol-forming substrate; and an ejector, wherein a portion of the ejector is configured to slide in the cavity to eject the aerosol-forming substrate from the cavity. 2. The cartridge according to claim 1, characterized in that the housing defines an axial air inlet, a first radial air inlet, and an air outlet located further downstream of the axial air inlet and the first radial air inlet. 3. The cartridge according to claim 2, characterized in that the housing defines a second radial air inlet, wherein the second radial air inlet is located at a distance from the first radial air inlet in an axial direction along the housing. 4. The cartridge according to claim 3, characterized in that the first radial air inlet comprises a first plurality of openings forming a first annular air-permeable strip in the housing, and the second radial air inlet comprises a second plurality of openings forming a second annular air-permeable strip in the housing, wherein the second annular air-permeable strip is located at a distance in the axial direction along the housing from the first air-permeable strip. 5. The cartridge according to claim 4, characterized in that the first air-permeable strip has a first permeability for the air flow passing through it, and the second air-permeable strip has a second permeability for the air flow passing through it, wherein the first permeability differs from the second permeability. 6. A cartridge according to any of the preceding claims, characterized in that the air flow path is defined through the mouthpiece in such a way that, in use, air flows through the housing and then through the mouthpiece, wherein the mouthpiece comprises a constriction zone and an expansion zone, wherein the constriction zone constricts the air flow through the mouthpiece, and the expansion zone provides for the expansion of the air flow in the mouthpiece. 7. A cartridge according to any of the preceding claims, characterized in that, in use, the ejector acts as a stop for the aerosol-forming substrate inserted into the cavity. 8. A cartridge according to any of the preceding claims, characterized in that the housing comprises a groove that extends axially along the housing, wherein the groove is designed to allow the user to determine whether an aerosol-forming substrate is located within the cavity of the housing. 9. The cartridge according to item 8, characterized in that the ejector is connected to the groove. 10. A cartridge according to any of the preceding claims, characterized in that the cartridge comprises a locking component of a heat-activated mechanical locking mechanism, and wherein, when the cartridge is engaged with the aerosol generating device, the locking mechanism is capable of preventing the cartridge from being detached from the aerosol generating device if the temperature of the part of the locking mechanism exceeds a predetermined temperature. 11. The cartridge according to claim 10, characterized in that the blocking component comprises a thermal expansion component, wherein the thermal expansion component is configured to expand upon heating to engage with the engaging component of the aerosol generating device to prevent the cartridge from being detached from the aerosol generating device. 12. An aerosol generating system comprising an aerosol generating device and a cartridge according to any of the preceding claims. 13. An aerosol generating system according to claim 12, characterized in that the aerosol generating device is designed with the possibility of inductively heating the current-receiving material of the cartridge. 14. An aerosol generating system according to claim 12 or 13, characterized in that the aerosol generating device comprises a chamber for accommodating a cartridge, a first induction coil located around a first part of the chamber, and a second induction coil located around a second part of the chamber, wherein the second part of the chamber is at a distance in the axial direction along the chamber from the first part of the chamber. 15. An aerosol generating system according to claim 14, characterized in that the first induction coil is electrically connected to a first power source, and the second induction coil is electrically connected to a second power source different from the first power source.