WO2023112327A1 - Non-combustion-type flavor inhalation device - Google Patents

Abstract

A non-combustion-type flavor inhalation device in which a flavor stick equipped with a rod part is heated by a microwave heating method, the device comprising: a heating chamber having an internal space which the rod part can be housed therein so as to be freely removable therefrom or insertable therein; an antenna that is provided so as to project inside the heating chamber to radiate microwaves and that is to be inserted into the rod part from the leading end-side of the rod part when the rod part is inserted into the heating chamber; a shield member that is disposed along the outer circumference of the internal space and that prevents the microwaves radiated from the antenna from leaking to the outside the device during operation; and a guide member that is disposed between the internal space of the heating chamber and the shield member and that guides the insertion of the rod part by coming into contact with at least a portion of the outer circumferential surface of the rod part during the insertion of the rod part into the heating chamber, wherein the guide member is a dielectric material and has a lower thermal conductivity than the shield member.

Description

Non-combustion flavor suction device

The present invention relates to a non-combustion type flavor inhalation device.

Non-combustion type flavor inhalation devices have been proposed as an alternative to conventional combustible cigarettes that smoke by burning tobacco leaves. For example, a smoking tool has been proposed that heats a tobacco base material by radiating microwaves to the tobacco base material inserted in a heating cavity (eg, Patent Document 3).

WO2020/015223 Chinese Patent Application Publication No. 110279151 Chinese Patent Application Publication No. 110141002 Chinese Patent Application Publication No. 108777893

If a rod-shaped antenna is arranged in the heating chamber, and the antenna is inserted into the tip of the tobacco stick when the tobacco stick is inserted into the heating chamber, the load will be reduced if the tobacco stick is not properly inserted into the heating chamber. may cause damage to the antenna or cigarette stick. For this reason, it is conceivable to provide a guide member in the heating chamber to guide the tobacco stick so that it can be inserted correctly. rice field.

Also, when heating a tobacco stick inserted into the heating chamber with microwaves radiated from an antenna, it is desirable to provide a shield member along the outer circumference of the heating chamber to suppress leakage of microwaves to the outside of the heating chamber. However, many members that can suppress the leakage of microwaves have relatively high thermal conductivity, such as metal, and if the heat of the tobacco stick escapes through this shield member, the heating efficiency of the tobacco stick will decrease. There was a problem.

The purpose of the present invention is to provide technology for efficiently heating tobacco sticks with microwaves.

A non-combustion type flavor inhalation device according to the present invention for solving the above problems,
A non-combustion type flavor suction device that heats a flavor stick having a rod portion by a microwave heating method,
a heating chamber having an internal space capable of accommodating the rod portion in a detachable manner;
an antenna that protrudes inside the heating chamber and radiates microwaves, the antenna being inserted into the rod portion from the tip side of the rod portion when the rod portion is inserted into the heating chamber;
a shield member disposed along the outer periphery of the internal space and suppressing leakage of microwaves radiated from the antenna to the outside of the device during operation;
The shield member is disposed between the inner space of the heating chamber and the shield member, and guides the insertion of the rod portion by contacting at least a portion of the outer peripheral surface of the rod portion when the rod portion is inserted into the heating chamber. a guide member for
with
The guide member is a dielectric and has a lower thermal conductivity than the shield member. The rod part may contain the flavor source and the aerosol base.

The guide member may be made of a material having a dielectric constant of 10 or less and a dielectric loss angle of 0.1 or less.

The guide member may be made of a material having a dielectric constant of 4 or less and a dielectric loss angle of 0.001 or less.

The guide member is quartz glass, polytetrafluoroethylene, polyethylene, polyethylene terephthalate, polylactic acid, syndiotactic polystyrene, polyphenylene ether, polyimide, polyetherimide, soda glass, steatite, paper, epoxy, polycarbonate, ABS resin. (acrylonitrile butadiene styrene copolymer synthetic resin), polyacetal, copolyester, polyether ether ketone, polyamideimide, silicone, ethylene propylene diene rubber (EPDM), ethylene propylene rubber (EPM), acrylic, alumina, borosilicate glass, forsterite , polypropylene, or a combination thereof.

In the non-combustion type flavor inhaling device, the thickness dimension of the guide member in a direction orthogonal to the insertion/extraction direction of the rod portion with respect to the heating chamber may be larger than the thickness dimension of the shield member.

The thickness dimension of the guide member may be 0.5 mm to 2.0 mm.

The antenna is rod-shaped or plate-shaped, protrudes into the heating chamber from the bottom surface of the heating chamber located on the side opposite to the rod insertion opening end, and extends along the central axis of the heating chamber. may exist.

The antenna may be arranged coaxially with the central axis of the heating chamber.

The guide member may have voids or air bubbles inside, or may have an air layer between it and the rod portion or the shield member.

The guide member may have a vacuum layer inside along the insertion/extraction direction of the rod portion with respect to the heating chamber.

The guide member is arranged at a position spaced apart from the bottom surface of the heating chamber located on the opposite side of the rod insertion port end,
A gap may be formed between the rear end surface of the guide member located on the chamber bottom surface side and the chamber bottom surface.

The shield member and the guide member may have a cylindrical shape extending along the insertion/extraction direction of the rod portion with respect to the heating chamber. The shield member and the guide member may have a cylindrical shape, an elliptical cylindrical shape, or a square cylindrical shape.

The shield member has a cylindrical shape extending along the insertion/extraction direction of the rod portion with respect to the heating chamber. good.

It should be noted that the contents described in the means for solving the problems can be combined as much as possible without departing from the problems and technical ideas of the present invention.

According to the present invention, it is possible to provide a technique for efficiently heating tobacco sticks with microwaves.

1 is a schematic configuration diagram of a non-combustion type flavor inhalation system according to an embodiment; FIG. 1 is a perspective view of a tobacco stick according to an embodiment; FIG. FIG. 4 is a diagram illustrating the internal structure of the tobacco stick according to the embodiment; It is a figure which shows roughly the internal structure of the non-combustion type flavor inhalation device which concerns on embodiment. FIG. 5 is a cross-sectional view taken along line AA of FIG. 4; It is a figure which shows an example of the material used for a guide member. It is a figure which shows the structure of a microwave generation part. 2 is a schematic configuration diagram of a non-combustion type flavor inhalation device according to Modification 1. FIG. FIG. 9 is a cross-sectional view of the heating chamber taken along line BB of FIG. 8; FIG. 11 is a schematic configuration diagram of a non-combustion type flavor inhalation device according to Modification 2; 11 is a cross-sectional view of the heating chamber taken along line CC of FIG. 10; FIG. FIG. 10 is a diagram showing an example in which unevenness is provided on the housing cavity side surface of the guide member. It is a figure which shows the example which provided unevenness|corrugation in the shield member side surface of a guide member. FIG. 11 is a schematic configuration diagram of a non-combustion type flavor inhalation device according to Modification 3; FIG. 15 is a cross-sectional view of the heating chamber taken along line DD of FIG. 14;

Here, embodiments of the flavor stick and the non-combustion type flavor suction system according to the present invention will be described based on the drawings. Note that the dimensions, materials, shapes, relative positions, etc. of the components described in this embodiment are examples. For example, in the present embodiment, a flavor stick containing a tobacco filling (hereinafter also referred to as a "tobacco stick") will be described as an example of a flavor stick. may include

<First Embodiment>
FIG. 1 is a schematic configuration diagram of a non-combustion type flavor inhalation system 200 according to an embodiment. FIG. 2 is a perspective view of the tobacco stick 100 according to the embodiment, and FIG. 3 is a diagram explaining the internal structure of the tobacco stick 100 according to the embodiment. 1 to 3, the horizontal direction of the tobacco stick 100 or the non-combustion type flavor suction device 30 into which the tobacco stick 100 is inserted is shown as the X direction, the vertical direction as the Y direction, and the depth direction as the Z direction. The same applies to subsequent figures. These directions are merely examples for convenience of explanation, and do not limit each element of the non-combustion type flavor inhalation system 200 . For example, each element of the non-combustion type flavor inhalation system 200 is not limited to being arranged in the direction shown in the drawing.

The non-combustion type flavor inhalation system 200 includes a tobacco stick 100 and a non-combustion type flavor inhalation device 30 that heats the tobacco rod portion (flavor rod portion) 110 of the tobacco stick 100 . The tobacco stick 100 is removably accommodated in the accommodation cavity 311 of the heating chamber 310 through the insertion port 3A of the non-combustion type flavor suction device 30 .

When the user uses the non-combustion type flavor suction device 30, the tobacco stick 100 is inserted into the accommodation cavity 311, and the tobacco filling in the tobacco stick 100 is heated by a microwave heating method as described later. , to generate an aerosol containing tobacco components for inhalation by the user.

[cigarette stick]
The tobacco stick 100 according to this embodiment is in the form of a substantially cylindrical rod. In the example shown in FIGS. 2 and 3, the tobacco stick 100 includes a tobacco rod portion 110, a mouthpiece portion (mouthpiece portion) 120, and tipping paper 130 connecting them together. Mouthpiece portion 120 is coaxially connected to tobacco rod portion 110 by being wrapped with tip paper 130 together with tobacco rod portion 110 .

Reference numeral 101 is the mouthpiece end of the tobacco stick 100 (mouthpiece portion 120). Reference numeral 102 is the tip of the tobacco stick 100 opposite to the mouthpiece end 101 . The tobacco rod portion 110 is arranged on the tip 102 side of the tobacco stick 100 . In the example shown in FIGS. 2 and 3, the tobacco stick 100 has a substantially constant diameter along the entire longitudinal direction (hereinafter also referred to as the axial direction or Z direction) from the mouth end 101 to the tip 102. there is

[Tip paper]
The material of the tip paper 130 is not particularly limited, and may be paper made of general plant fibers (pulp), sheets using polymer-based chemical fibers (polypropylene, polyethylene, nylon, etc.), polymer-based A sheet, a metal foil, etc., or a composite material combining these can be used. For example, the tipping paper 130 may be made of a composite material in which a polymer sheet is attached to a paper substrate. Note that the tipping paper 130 here means a sheet-like material that connects a plurality of segments of the tobacco stick 100, such as connecting the tobacco rod portion 110 and the mouthpiece portion 120, for example.

Although the basis weight of the tipping paper 130 is not particularly limited, it is usually 32 gsm or more and 40 gsm or less, preferably 33 gsm or more and 39 gsm or less, and more preferably 34 gsm or more and 38 gsm or less. Although the air permeability of the tipping paper 130 is not particularly limited, it is generally 0 Coresta unit or more and 30000 Coresta unit or less, preferably more than 0 Coresta unit and 10000 Coresta unit or less. Air permeability is a value measured in accordance with ISO 2965:2009, and is expressed as the flow rate (cm ³ ) of gas passing through an area of 1 cm ² per minute when the pressure difference between both sides of the paper is 1 kPa. be done. One Coresta unit (1 Coresta unit, 1 CU) is cm ³ /(min·cm ² ) under 1 kPa.

The tip paper 130 may contain fillers other than the above pulp, such as metal carbonates such as calcium carbonate and magnesium carbonate, metal oxides such as titanium oxide, titanium dioxide and aluminum oxide, barium sulfate, metal sulfates such as calcium sulfate, metal sulfides such as zinc sulfide, quartz, kaolin, talc, diatomaceous earth, gypsum, etc.; preferably contains These fillers may be used singly or in combination of two or more.

The chipping paper 130 may be added with various auxiliary agents in addition to the pulp and filler described above. For example, it may contain a water resistance improver to improve water resistance. Water resistance improvers include wet strength agents (WS agents) and sizing agents. Examples of wet strength agents include urea formaldehyde resin, melamine formaldehyde resin, polyamide epichlorohydrin (PAE), and the like. Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol having a degree of saponification of 90% or more.

A coating agent may be added to at least one of the front and back sides of the tip paper 130 . The coating agent is not particularly limited, but a coating agent capable of forming a film on the paper surface and reducing liquid permeability is preferred.

The manufacturing method of the chip paper 130 is not particularly limited, and a general method can be applied. In the papermaking process using a circular and short-circle multi-purpose paper machine, there is a method of adjusting the texture and making it uniform. If necessary, a wet strength agent may be added to impart water resistance to the wrapping paper, or a sizing agent may be added to adjust the printing quality of the wrapping paper.

<Tobacco rod part>
The configuration of the tobacco rod portion 110 is not particularly limited, and may be a general configuration. For example, tobacco filling 111 wrapped with wrapping paper 112 can be used.

[Tobacco filling]
The tobacco filling 111 includes, as a flavor source, tobacco leaves, tobacco leaf extracts, and processed products thereof, for example. In this embodiment, the tobacco filling 111 is configured to include cut tobacco. The cut tobacco material contained in the tobacco filling 111 is not particularly limited, and known materials such as lamina and backbone can be used. Further, dried tobacco leaves are pulverized to an average particle size of 20 μm or more and 200 μm or less to obtain pulverized tobacco, which is homogenized and processed into a sheet (hereinafter also simply referred to as a homogenized sheet). It can be chopped. Further, it may be a so-called strand type in which a homogenizing sheet having a length approximately equal to the longitudinal direction of the tobacco rod is chopped substantially horizontally to the longitudinal direction of the tobacco rod and filled into the tobacco rod. In addition, the width of the cut tobacco is preferably 0.5 mm or more and 2.0 mm or less for filling tobacco rod portion 110 . The content of dried tobacco leaves contained in the tobacco rod portion 110 is not particularly limited, but may be 200 mg/rod portion or more and 800 mg/rod portion or less, and may be 250 mg/rod portion or more and 600 mg/rod portion or less. is preferred. This range is particularly suitable for a tobacco rod 110 with a circumference of 22 mm and a length of 20 mm.

Various kinds of tobacco can be used for the tobacco leaves used for producing the cut tobacco and the homogenized sheet. Examples include yellow, burley, oriental, landrace, other Nicotiana-tabacum varieties, Nicotiana-Rustica varieties, and mixtures thereof. As for the mixture, the above varieties can be appropriately blended and used so as to obtain the desired taste. Details of the tobacco varieties are disclosed in "Tobacco Encyclopedia, Tobacco Research Center, March 31, 2009". There are a number of conventional methods for producing the homogenized sheet, that is, methods for pulverizing tobacco leaves and processing them into homogenized sheets. The first is a method of producing a papermaking sheet using a papermaking process. The second method is to mix pulverized tobacco leaves with an appropriate solvent such as water to homogenize the mixture, and then thinly cast the homogenized product on a metal plate or metal plate belt and dry it to produce a cast sheet. is. A third method is to prepare a rolled sheet by mixing a suitable solvent such as water with pulverized tobacco leaves, homogenizing the mixture, and extruding the mixture into a sheet. The types of the homogenizing sheet are disclosed in detail in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009".

The water content of the tobacco filling 111 can be 10% by weight or more and 15% by weight or less, preferably 11% by weight or more and 13% by weight or less, relative to the total amount of the tobacco filling 111 . With such a water content, the occurrence of winding stains is suppressed, and the winding aptitude of the tobacco rod portion 110 at the time of manufacture is improved. There are no particular restrictions on the size of the shredded tobacco contained in the tobacco filling 111 and the preparation method thereof. For example, dried tobacco leaves cut into pieces having a width of 0.5 mm or more and 2.0 mm or less may be used. In addition, when using a pulverized product of a homogenized sheet, dry tobacco leaves are pulverized to an average particle size of about 20 μm to 200 μm and homogenized. You may use the thing chopped into 0 mm or less.

The tobacco filling 111 may contain an aerosol base that produces aerosol smoke. The type of the aerosol base is not particularly limited, and substances extracted from various natural products and/or constituents thereof can be selected depending on the application. Aerosol bases can include glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof. The content of the aerosol base material in the tobacco filling 111 is not particularly limited, but from the viewpoint of sufficiently generating an aerosol and imparting a good flavor, it is usually 5% by weight or more with respect to the total amount of the tobacco filling. preferably 10% by weight or more, and usually 50% by weight or less, preferably 15% by weight or more and 25% by weight or less.

The tobacco filling 111 may contain flavoring. The type of flavor is not particularly limited, and from the viewpoint of imparting good flavor, acetoanisole, acetophenone, acetylpyrazine, 2-acetylthiazole, alfalfa extract, amyl alcohol, amyl butyrate, trans-anethole, star anise oil. , apple juice, Peruvian balsam oil, beeswax absolute, benzaldehyde, benzoin resinoids, benzyl alcohol, benzyl benzoate, benzyl phenylacetate, benzyl propionate, 2,3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil. , carob absolute, β-carotene, carrot juice, L-carvone, β-caryophyllene, cassia bark oil, cedarwood oil, celery seed oil, chamomile oil, cinnamaldehyde, cinnamic acid, cinnamyl alcohol, cinnamyl cinnamate, citronella Oil, DL-citronellol, clary sage extract, cocoa, coffee, cognac oil, coriander oil, cumin aldehyde, davana oil, δ-decalactone, γ-decalactone, decanoic acid, dill herb oil, 3,4-dimethyl-1,2 -cyclopentanedione, 4,5-dimethyl-3-hydroxy-2,5-dihydrofuran-2-one, 3,7-dimethyl-6-octenoic acid, 2,3-dimethylpyrazine, 2,5-dimethylpyrazine , 2,6-dimethylpyrazine, ethyl 2-methylbutyrate, ethyl acetate, ethyl butyrate, ethyl hexanoate, ethyl isovalerate, ethyl lactate, ethyl laurate, ethyl levulinate, ethyl maltol, ethyl octanoate, ethyl oleate , ethyl palmitate, ethyl phenylacetate, ethyl propionate, ethyl stearate, ethyl valerate, ethyl vanillin, ethyl vanillin glucoside, 2-ethyl-3, (5 or 6)-dimethylpyrazine, 5-ethyl-3-hydroxy -4-methyl-2(5H)-furanone, 2-ethyl-3-methylpyrazine, eucalyptol, fenugreek absolute, gene absolute, gentian root infusion, geraniol, geranyl acetate, grape juice, guaiacol, guava extract, γ-heptalactone, γ-hexalactone, hexanoic acid, cis-3-hexen-1-ol, hexyl acetate, hexyl alcohol, hexyl phenylacetate, honey, 4-hydroxy-3-pentenoic acid lactone, 4-hydroxy-4 -(3-Hydroxy-1-butenyl)-3,5,5-trimethyl-2-cyclohexen-1-one, 4-(para-hydroxyphenyl)-2-butanone, sodium 4-hydroxyundecanoate, immortel Absolute, beta-ionone, isoamyl acetate, isoamyl butyrate, isoamyl phenylacetate, isobutyl acetate, isobutyl phenylacetate, jasmine absolute, cola nut tincture, labdanum oil, lemon terpeneless oil, licorice extract, linalool, linalyl acetate, lobage root. Oil, maltol, maple syrup, menthol, menthone, L-menthyl acetate, para-methoxybenzaldehyde, methyl-2-pyrrolyl ketone, methyl anthranilate, methyl phenylacetate, methyl salicylate, 4'-methylacetophenone, methylcyclopentenolone, 3- Methylvalerate, mimosa absolute, honey, myristic acid, nerol, nerolidol, γ-nonalactone, nutmeg oil, δ-octalactone, octanal, octanoic acid, orange flower oil, orange oil, orris root oil, palmitic acid, ω- Pentadecalactone, peppermint oil, petitgrain paraguay oil, phenethyl alcohol, phenethyl phenylacetate, phenylacetic acid, piperonal, plum extract, propenylguaethol, propyl acetate, 3-propylidenephthalide, prune juice, pyruvic acid, raisins. Extract, rose oil, rum, sage oil, sandalwood oil, spearmint oil, styrax absolute, marigold oil, tea distillate, α-terpineol, terpinyl acetate, 5,6,7,8-tetrahydroquinoxaline, 1 ,5,5,9-tetramethyl-13-oxacyclo(8.3.0.0(4.9))tridecane, 2,3,5,6-tetramethylpyrazine, thyme oil, tomato extract, 2- tridecanone, triethyl citrate, 4-(2,6,6-trimethyl-1-cyclohexenyl)2-buten-4-one, 2,6,6-trimethyl-2-cyclohexene-1,4-dione, 4- (2,6,6-trimethyl-1,3-cyclohexadienyl)2-buten-4-one, 2,3,5-trimethylpyrazine, γ-undecalactone, γ-valerolactone, vanilla extract, vanillin , veratraldehyde, violet leaf absolute, N-ethyl-p-menthane-3-carboamide (WS-3), ethyl-2-(p-menthane-3-carboxamide) acetate (WS-5), especially Menthol is preferred. Moreover, these fragrance|flavors may be used individually by 1 type, or may use 2 or more types together.

The content of the flavoring agent in the tobacco filling 111 is not particularly limited, and is generally 10,000 ppm or more, preferably 20,000 ppm or more, more preferably 25,000 ppm or more, from the viewpoint of imparting good flavor. It is 70000 ppm or less, preferably 50000 ppm or less, more preferably 40000 ppm or less, still more preferably 33000 ppm or less.

[rolling paper]
The wrapping paper 112 is a sheet material for wrapping the tobacco filler 111, and its structure is not particularly limited, and a general one can be used. For example, the base paper used for the wrapping paper 112 may be cellulose fiber paper, more specifically hemp or wood or a mixture thereof. The basis weight of the base paper in the wrapping paper 112 is, for example, usually 20 gsm or more, preferably 25 gsm or more. On the other hand, the basis weight is usually 65 gsm or less, preferably 50 gsm or less, more preferably 45 gsm or less. The thickness of the wrapping paper 112 having the above properties is not particularly limited, and is usually 10 μm or more, preferably 20 μm or more, and more preferably 30 μm, from the viewpoint of rigidity, air permeability, and ease of adjustment during paper production. In addition, it is usually 100 μm or less, preferably 75 μm or less, and more preferably 50 μm or less.

The shape of the wrapping paper 112 of the tobacco rod portion 110 (tobacco filler 111) can be square or rectangular. When used as the wrapping paper 112 for wrapping the tobacco filling 111 (for producing the tobacco rod portion 110), the length of one side can be about 6 mm to 70 mm, and the length of the other side is about 15 mm to 15 mm. 28 mm, and a preferable length of the other side is 22 mm to 24 mm, and a more preferable length is about 23 mm.

In addition to the above pulp, the wrapping paper 112 may contain a filler. The content of the filler can be 10% by weight or more and less than 60% by weight, preferably 15% by weight or more and 45% by weight or less, based on the total weight of the wrapping paper 112 . In the wrapping paper 112, the filler is preferably 15% by weight or more and 45% by weight or less in a preferable basis weight range (25 gsm or more and 45 gsm or less). Furthermore, when the basis weight is 25 gsm or more and 35 gsm or less, the filler content is preferably 15% or more and 45% or less by weight, and when the basis weight is more than 35 gsm and 45 gsm or less, the filler content is preferably 25% or more and 45% by weight. % or less. As a filler, calcium carbonate, titanium dioxide, kaolin, and the like can be used, but from the viewpoint of enhancing flavor and whiteness, it is preferable to use calcium carbonate.

Various auxiliary agents other than base paper and fillers may be added to the wrapping paper 112. For example, a water resistance improver can be added to improve water resistance. Water resistance improvers include wet strength agents (WS agents) and sizing agents. Examples of wet strength agents include urea formaldehyde resin, melamine formaldehyde resin, polyamide epichlorohydrin (PAE), and the like. Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol having a degree of saponification of 90% or more. As an auxiliary agent, a paper strength agent may be added, and examples thereof include polyacrylamide, cationic starch, oxidized starch, CMC, polyamide epichlorohydrin resin, polyvinyl alcohol, and the like. In particular, it is known that the use of an extremely small amount of oxidized starch improves air permeability (for example, JP-A-2017-218699). Moreover, the wrapping paper 112 may be appropriately coated.

A coating agent may be added to at least one of the front and back sides of the wrapping paper 112 . The coating agent is not particularly limited, but a coating agent capable of forming a film on the paper surface and reducing liquid permeability is preferred. For example, alginic acid and its salts (e.g. sodium salts), polysaccharides such as pectin, cellulose derivatives such as ethyl cellulose, methyl cellulose, carboxymethyl cellulose, nitrocellulose, starch and derivatives thereof (e.g. carboxymethyl starch, hydroxyalkyl starch and cationic starch). and ether derivatives such as starch acetate, starch phosphate and ester derivatives such as starch octenylsuccinate).

The axial length of the tobacco rod portion 110 can be appropriately changed according to the size of the product. is more preferably 70 mm or less, preferably 50 mm or less, more preferably 30 mm or less, and even more preferably 25 mm or less.

<Mouthpiece part>
The configuration of the tobacco stick 100 is not particularly limited, and can be of a general form. In the embodiment shown in FIG. 1, mouthpiece portion 120 includes two segments: cooling segment 121 and filtering segment 122 . The cooling segment 121 is arranged so as to be sandwiched between the tobacco rod portion 110 and the filter segment 122 while being in contact with them. Alternatively, gaps may be formed between the tobacco rod portion 110 and the cooling segment 121 and between the tobacco rod portion 110 and the filter segment 122 . Alternatively, mouthpiece portion 120 may be formed from a single segment.

[Cooling segment]
The structure of the cooling segment 121 is not particularly limited as long as it has a function of cooling mainstream tobacco smoke. In this case, the inside of the cylindrical shape is a cavity, and the vapor containing the aerosol base and the tobacco flavor component is cooled by coming into contact with the air in the cavity.

As one aspect of the cooling segment 121, it may be a paper tube formed by processing a sheet of paper or a sheet of paper laminated with a plurality of sheets into a cylindrical shape. In addition, it is preferable that there are holes for introducing the outside air around the paper tube in order to bring the room temperature outside air into contact with the high temperature steam to increase the cooling effect. The cooling segment 121 is provided with vent holes 103, which are openings for taking in air from the outside. The number of vent holes 103 in cooling segment 121 is not particularly limited. In this embodiment, a plurality of ventilation holes 103 are arranged at regular intervals in the circumferential direction of the cooling segment 121 . Also, the group of vent holes 103 arranged in the circumferential direction of the cooling segment 121 may be formed in multiple stages along the axial direction of the cooling segment 121 . By providing the cooling segment 121 with the ventilation hole 103, low-temperature air flows into the cooling segment 121 from the outside when the tobacco stick 100 is sucked, and the temperature of the volatile components and air flowing in from the tobacco rod portion 110 is lowered. be able to. Also, the vapor containing the aerosol base and the tobacco flavor component is condensed by being cooled by the low-temperature air introduced into the cooling segment 121 through the ventilation holes 103 . This facilitates the generation of aerosol and allows the size of the aerosol particles to be controlled. In addition, by coating the inner surface of the paper tube with a polymer such as polyvinyl alcohol or a polysaccharide coating such as pectin, the cooling effect can be increased by utilizing the heat absorption of the coating and the heat of solution accompanying the phase change. can. The ventilation resistance of this cylindrical cooling segment is zero _mmH2O .

When the cooling segment 121 is filled with a sheet or the like for cooling volatile components and air flowing into the cooling segment 121 from the tobacco rod portion 110, the total surface area of the cooling segment 121 is not particularly limited, and is, for example, 300 mm ² /mm. Above, ^1000mm2 /mm or less can be mentioned. This surface area is the surface area per length (mm) of the cooling segment 121 in the ventilation direction. The total surface area of the cooling segment 121 is preferably 400 mm ² /mm or more, more preferably 450 mm ² /mm or more, while preferably 600 mm ² /mm or less, and preferably 550 mm ² /mm or less. It is more preferable to have

The cooling segment 121 desirably has a large total surface area in its internal structure. Thus, in a preferred embodiment, cooling segment 121 may be formed by a thin sheet of material that is crumpled to form channels and then pleated, gathered and folded. The more folds or folds in a given volume of element, the greater the total surface area of cooling segment 121 . The thickness of the constituent material of the cooling segment 121 is not particularly limited, and may be, for example, 5 μm or more and 500 μm or less, or 10 μm or more and 250 μm or less.

It is also desirable to use paper as a material for the cooling sheet member from the viewpoint of reducing the environmental load. Paper as a material for the cooling sheet preferably has a basis weight of 30 to 100 g/m ² and a thickness of 20 to 100 μm. From the viewpoint of reducing the removal of the flavor source component and the aerosol base component in the cooling segment, the air permeability of the paper used as the material for the cooling sheet is desirably low, and the air permeability is preferably 10 Coresta or less. By applying polymer porting such as polyvinyl alcohol or polysaccharide coating such as pectin to paper as a material for the cooling sheet, the cooling effect is increased by utilizing the heat absorption and the heat of dissolution accompanying the phase change of the coating. can also

The vent hole 103 in the cooling segment 121 is preferably arranged at a position separated by 4 mm or more from the boundary between the cooling segment 121 and the filter segment 122 . This not only improves the cooling capacity of the cooling segment 121, but also suppresses the retention of the component generated by heating within the cooling segment 121, thereby improving the delivery amount of the component. It is preferable that the tip paper 130 is provided with an opening at a position directly above (overlapping position) the vent hole 103 provided in the cooling segment 121 . The openings of the cooling segment 121 are the ratio of air inflow from the openings when the automatic smoking machine sucks at 17.5 ml / sec (the ratio of the air sucked from the mouth end is 100% by volume. The volume ratio of the air that has flowed in) is preferably 10 to 90% by volume, preferably 50 to 80% by volume, more preferably 55 to 75% by volume. The number of Vs can be selected from the range of 5 to 50, the diameter of the apertures V can be selected from the range of 0.1 to 0.5 mm, and a combination of these selections can be achieved. The above-mentioned air inflow rate can be measured by a method based on ISO9512 using an automatic smoking machine (for example, a single bottle automatic smoking machine manufactured by Borgwaldt). The length of the cooling segment 121 in the axial direction (ventilation direction) is not particularly limited, but is usually 10 mm or more, preferably 15 mm or more, and usually 40 mm or less, preferably 35 mm or less, and 30 mm. The following are more preferable. A particularly preferred axial length of the cooling segment 121 is 20 mm. By setting the axial length of the cooling segment 121 to the above lower limit or more, a sufficient cooling effect can be ensured and a good flavor can be obtained. Further, by setting the axial length of the cooling segment 121 to the above upper limit or less, it is possible to suppress losses caused by adhesion of steam and aerosol generated during use to the inner wall of the cooling segment 121 .

[Filter segment]
The configuration of the filter segment 122 is not particularly limited as long as it functions as a general filter. The single filament fineness and the total fineness of the cellulose acetate tow are not particularly limited, but when the circumference of the filter segment 122 is 22 mm, the single filament fineness is preferably 5 to 20 g/9000 m, and the total fineness is preferably 12000 to 30000 g/9000 m. The cross-sectional shape of the fibers of the cellulose acetate tow may be a Y cross section or an R cross section. When cellulose acetate tow is filled to form the filter segment 122, 5 to 10% by weight of triacetin may be added to the weight of the cellulose acetate tow in order to improve the hardness of the filter. Although the filter segment 122 is composed of a single segment in the example shown in FIG. 2, the filter segment 122 may be composed of a plurality of segments. When the filter segment 122 is composed of a plurality of segments, for example, a hollow segment such as a center hole is arranged on the upstream side (tobacco rod portion 110 side), and a segment on the downstream side (mouthpiece end 101 side) has a mouthpiece section made of cellulose. Mention may be made of the arrangement of acetate filters filled with acetate tow. According to such an aspect, unnecessary loss of generated aerosol can be prevented, and the appearance of the tobacco stick 100 can be improved. In addition, from the viewpoint of change in sensation of sucking response and comfort in the mouth, an acetate filter is arranged on the upstream side (tobacco rod portion 110 side), and a hollow segment such as a center hole is arranged on the downstream side (mouthpiece end 101 side). A mode of doing so is also acceptable. Also, the filter segment 122 may be configured using other alternative filter materials, such as a paper filter filled with sheet-like pulp paper, instead of the acetate filter.

General functions of the filter in the filter segment 122 include, for example, adjustment of the amount of air mixed when inhaling aerosol, etc., reduction of flavor, reduction of nicotine and tar, etc. All of these functions are provided. It is not necessary to have In addition, compared to cigarette products, electrically heated tobacco products, which tend to produce less components and have a lower filling rate of tobacco filling, suppress the filtration function and prevent the tobacco filling from falling. Prevention is also one of the important functions.

The cross-sectional shape of the filter segment 122 is substantially circular, and the diameter of the circle can be changed as appropriate according to the size of the product. , 8.5 mm or less, and more preferably 5.0 mm or more and 8.0 mm or less. If the cross section is not circular, the diameter of the circle is applied assuming a circle having the same area as the cross section. The peripheral length of the filter segment 122 can be appropriately changed according to the size of the product. It is more preferably 0 mm or more and 25.0 mm or less. The axial length of the filter segment 122 can be appropriately changed according to the size of the product, but is usually 5 mm or more and 35 mm or less, preferably 10.0 mm or more and 30.0 mm or less. The shape and dimensions of the filter medium can be appropriately adjusted so that the shape and dimensions of the filter segment 122 are within the above ranges.

The ventilation resistance per 120 mm of axial length of the filter segment 122 is not particularly limited, but is usually 40 mmH ₂ O or more and 300 mmH ₂ O or less, preferably 70 mmH ₂ O or more and 280 mmH ₂ O or less, and 90 mmH 2 O or more. ₂ O or more and 260 mmH ₂ O or less is more preferable. The above airflow resistance is measured according to the ISO standard method (ISO6565) using, for example, a filter airflow resistance measuring instrument manufactured by Cerulean. The ventilation resistance of the filter segment 122 is such that a predetermined air flow rate (17.5 cc/cm) from one end surface (first end surface) to the other end surface (second end surface) in a state in which air does not permeate the side surfaces of the filter segment 122. min) indicates the air pressure difference between the first end surface and the second end surface when air is flowed. The unit of airflow resistance can generally be expressed in _mmH2O . It is known that the relationship between the ventilation resistance of the filter segment 122 and the length of the filter segment 122 is a proportional relationship in the length range (5 mm to 200 mm in length) that is normally implemented, and the length of the filter segment 122 is If it doubles, the ventilation resistance also doubles.

The density of the filter medium in the filter segment 122 is not particularly limited, but is usually 0.10 g/cm ³ or more and 0.25 g/cm ³ or less, and 0.11 g/cm ³ or more and 0.24 g/cm ³ . It is preferably 0.12 g/cm ³ or more and 0.23 g/cm ³ or less. The filter segment 122 may be provided with a paper roll (filter plug paper roll) around which a filter medium or the like is wound, from the viewpoint of improving strength and structural rigidity. Embodiments of the web are not particularly limited and may include one or more rows of adhesive-containing seams. The adhesive may comprise a hot melt adhesive, and the hot melt adhesive may comprise polyvinyl alcohol. Moreover, when the filter segment 122 consists of two or more segments, it is preferable to wind these two or more segments together. The material of the paper roll in the filter segment 122 is not particularly limited, and known materials can be used, and it may contain a filler such as calcium carbonate.

The thickness of the roll paper is not particularly limited, and is usually 20 µm or more and 140 µm or less, preferably 30 µm or more and 130 µm or less, and more preferably 30 µm or more and 120 µm or less. The basis weight of the web is not particularly limited, and is usually 20 gsm or more and 100 gsm or less, preferably 22 gsm or more and 95 gsm or less, and more preferably 23 gsm or more and 90 gsm or less. Further, the web may or may not be coated, but from the viewpoint of imparting functions other than strength and structural rigidity, it is preferably coated with a desired material.

When the filter segment 122 includes a center hole segment and a filter medium, the center hole segment and the filter medium may be connected by an outer plug wrapper (outer roll paper), for example. The outer plug wrapper can be, for example, a cylinder of paper. Further, the tobacco rod portion 110, the cooling segment 121, and the connected center hole segment and filter media may be connected by, for example, mouthpiece lining paper. These connections are made by, for example, applying paste such as vinyl acetate paste to the inner surface of the mouthpiece lining paper, and then inserting the tobacco rod portion 110, the cooling segment 121, and the already connected center hole segment and filter material and winding them. can do. In addition, these may be divided into multiple times and connected with multiple lining papers.

The filter media of filter segment 122 may include a crushable additive release container (eg, capsule) with a crushable outer shell such as gelatin. The embodiment of the capsule (also called "excipient release container" in the technical field) is not particularly limited, and any known embodiment may be adopted. It can be a container. The shape of the capsule is not particularly limited, and may be, for example, an easily breakable capsule, and the shape is preferably spherical. The additive contained in the capsule may contain any of the additives described above, but it is particularly preferable to contain a flavoring agent and activated carbon. Additives may also include one or more materials to help filter smoke. Although the form of the additive is not particularly limited, it is usually liquid or solid. It should be noted that the use of capsules containing excipients is well known in the art. Destructible capsules and methods of making them are well known in the art.

Flavoring agents may be, for example, menthol, spearmint, peppermint, fenugreek, cloves, medium chain triglycerides (MCT), etc., or a combination thereof. The flavoring agent of this embodiment is menthol.

A perfume may be added to the filter material of the filter segment 122 . By adding flavor to the filter media, the amount of flavor delivered during use is increased compared to the prior art that adds flavor to the tobacco filling that constitutes the tobacco rod portion 110 . The degree of increase in perfume delivery is further increased depending on the position of the apertures provided in the cooling segment 121 . The method of adding the flavor to the filter medium is not particularly limited, and the flavor may be added so as to be dispersed substantially uniformly in the filter medium to which the flavor is to be added. As for the amount of perfume to be added, there is an embodiment in which the perfume is added to a portion of 10 to 100% by volume of the filter medium. As for the method of addition, it may be added to the filter material in advance before the formation of the filter segment, or may be added after the formation of the filter segment. The type of flavor is not particularly limited, but the same flavor as that contained in the above-described tobacco filling 111 may be used.

Filter segment 122 includes a filter media, at least a portion of which may be loaded with activated carbon. The amount of activated carbon added to the filter material is 15.0 m ² /cm 2 or ^more as a value of specific surface area of activated carbon×weight of activated carbon/cross-sectional area of filter material in a direction perpendicular to the ventilation direction in one tobacco stick 100. , 80.0 m ² /cm ² or less. For the sake of convenience, the above "specific surface area of activated carbon x weight of activated carbon/cross-sectional area of filter material perpendicular to ventilation direction" may be expressed as "surface area of activated carbon per unit cross-sectional area". The surface area of activated carbon per unit cross-sectional area can be calculated based on the specific surface area of activated carbon added to the filter medium of one tobacco stick 100, the weight of the added activated carbon, and the cross-sectional area of the filter medium. Since activated carbon is not uniformly dispersed in the filter medium to which it is added, it is necessary to satisfy the above range in all cross sections of the filter medium (cross sections perpendicular to the ventilation direction). not a requirement.

The surface area of the activated carbon per unit cross-sectional area is more preferably 17.0 m ² /cm ² or more, more preferably 35.0 m ² /cm ² or more. On the other hand, it is more preferably 77.0 m ² /cm ² or less, even more preferably 73.0 m ² /cm ² or less. The surface area of activated carbon per unit cross-sectional area can be adjusted, for example, by adjusting the specific surface area of activated carbon, the amount thereof added, and the cross-sectional area of the filter medium in the direction perpendicular to the airflow direction. The above calculation of the surface area of activated carbon per unit cross-sectional area is based on the filter medium to which activated carbon is added. When the filter segment 122 is composed of a plurality of filter media, the cross-sectional area and length of only the filter media to which activated carbon is added are used as references.

Examples of activated carbon include those made from wood, bamboo, coconut shells, walnut shells, coal, and the like. As the activated carbon, one having a BET specific surface area of 1100 m ² /g or more and 1600 m ^{2 /g or less can be used, preferably 1200 m 2 /} g or more and 1500 m ² /g or less. more preferably 1250 m ² /g or more and 1380 m ² /g or less. The BET specific surface area can be determined by a nitrogen gas adsorption method (BET multipoint method). Further, as the activated carbon, those having a pore volume of 400 μL/g or more and 800 μL/g or less, more preferably 500 μL/g or more and 750 μL/g or less can be used, More preferably, one with a concentration of 600 μL/g or more and 700 μL/g or less can be used. The pore volume can be calculated from the maximum adsorption amount obtained using the nitrogen gas adsorption method. The amount of activated carbon added per unit length in the ventilation direction of the filter medium to which activated carbon is added is preferably 5 mg/cm or more and 50 mg/cm or less, and is preferably 8 mg/cm or more and 40 mg/cm or less. It is more preferably 10 mg/cm or more and 35 mg/cm or less. By setting the specific surface area of the activated carbon and the amount of the activated carbon to be added within the above ranges, the surface area of the activated carbon per unit cross-sectional area can be adjusted to a desired value.

Further, the activated carbon preferably has a cumulative 10 volume % particle diameter (particle diameter D10) of 250 μm or more and 1200 μm or less. In addition, the cumulative 50% by volume particle diameter (particle diameter D50) of the activated carbon particles is preferably 350 μm or more and 1500 μm or less. In addition, the particle diameters D10 and D50 can be measured by a laser diffraction scattering method. As an apparatus suitable for this measurement, there is a laser diffraction/scattering particle size distribution measuring apparatus "LA-950" manufactured by Horiba. Powder is poured into the cell of this device together with pure water, and the particle size is detected based on the light scattering information of the particles.
The measurement conditions for the above measuring device are as follows.
Measurement mode: Manual flow mode cell measurement Dispersion medium: Ion-exchanged water Dispersion method: Measured after 1 minute of ultrasonic irradiation Refractive index: 1.92-0.00i (sample refraction) / 1.33-0.00i (dispersion medium refractive index)
Number of measurements: 2 measurements with different samples

Also, the method of adding activated carbon to the filter media of the filter segments 122 is not particularly limited, and the activated carbon may be added so as to be dispersed substantially uniformly in the filter media to which the activated carbon is added.

Also, in the tobacco stick 100 configured as described above, part of the outer surface of the tipping paper 130 may be covered with a lip release material. The lip release material assists the user in holding the mouthpiece portion 120 of the tobacco stick 100 in the mouth so that the contact between the lips and the tipping paper 130 can be easily released without substantially sticking. means a material composed of Lip release materials may include, for example, ethyl cellulose, methyl cellulose, and the like. For example, the outer surface of the tipping paper 130 may be coated with a rip release material by applying an ethylcellulose-based or methylcellulose-based ink to the outer surface of the tipping paper 130 .

In this embodiment, the lip release material of the tipping paper 130 is arranged at least in a predetermined mouthpiece region that contacts the user's lips when the user holds the mouthpiece portion 120 in his/her mouth. More specifically, of the outer surface of the tipping paper 130, the lip release material placement region R1 (see FIG. 2) covered with the lip release material extends from the mouthpiece end 101 of the mouthpiece portion 120 to the vent hole 103. defined as the region located in between.

In addition, although the ventilation resistance in the long axis direction per tobacco stick 100 configured as described above is not particularly limited, it is usually 8 mmH ₂ O or more, and 10 mmH ₂ O or more from the viewpoint of ease of sucking. It is preferably 12 mmH ₂ O or more, more preferably 100 mmH ₂ O or less, preferably 80 mmH ₂ O or less, and more preferably 60 mmH ₂ O or less. The airflow resistance is measured according to the ISO standard method (ISO6565:2015) using, for example, a filter airflow resistance meter manufactured by Cerulean. The airflow resistance is defined as air flow rate (17.5 cc/min) from one end face (first end face) to the other end face (second end face) in a state in which air does not permeate the side surfaces of tobacco stick 100. refers to the pressure difference between the first end surface and the second end surface when Units are generally expressed in _mmH2O . It is known that the relationship between the airflow resistance and the tobacco stick 100 is proportional in the length range (5 mm to 200 mm in length) that is normally implemented, and if the length of the tobacco stick 100 is doubled, The ventilation resistance is also doubled.

The rod-shaped tobacco stick 100 preferably has a columnar shape that satisfies a shape with an aspect ratio of 1 or more defined below.
Aspect ratio = h/w

w is the width of the tip 102 of the tobacco stick 100, h is the length in the axial direction, and h≧w is preferred. The cross-sectional shape of the tobacco stick 100 is not particularly limited, and may be polygonal, polygonal with rounded corners, circular, elliptical, or the like. The width w of the tobacco stick 100 is the diameter when the cross-sectional shape of the tobacco stick 100 is circular, the major axis when the cross-sectional shape is elliptical, and the diameter of the circumscribed circle or the major axis of the circumscribed ellipse when the tobacco stick 100 is polygonal or polygonal with rounded corners. be. The axial length h of the tobacco stick 100 is not particularly limited, and is, for example, usually 40 mm or more, preferably 45 mm or more, and more preferably 50 mm or more. Moreover, it is usually 100 mm or less, preferably 90 mm or less, and more preferably 80 mm or less. The width w of the tip 102 of the tobacco stick 100 is not particularly limited, and is usually 5 mm or more, preferably 5.5 mm or more. Moreover, it is usually 10 mm or less, preferably 9 mm or less, and more preferably 8 mm or less. The ratio of the length of the cooling segment 121 and the filter segment 122 to the length of the tobacco stick 100 (cooling segment:filter segment) is not particularly limited, but it is usually 0.00 from the viewpoint of the delivery amount of fragrance and appropriate aerosol temperature. 60-1.40: 0.60-1.40, 0.80-1.20: preferably 0.80-1.20, 0.85-1.15: 0.85-1 0.15, more preferably 0.90-1.10: 0.90-1.10, more preferably 0.95-1.05: 0.95-1.05 Especially preferred. By setting the length ratio of the cooling segment 121 and the filter segment 122 within the above range, the cooling effect, the effect of suppressing the loss due to the generated vapor and aerosol adhering to the inner wall of the cooling segment 121, and the filter air Good flavor and flavor intensity can be achieved by balancing the amount and flavor control functions.

<Non-combustion type flavor suction device>
FIG. 4 is a diagram schematically showing the internal structure of the non-combustion type flavor inhaling device 30 according to the first embodiment, and FIG. 5 is a cross-sectional view taken along line AA in FIG. The non-combustion type flavor inhalation device 30 has a housing 31 that is a housing for accommodating various components. The housing 31 accommodates a shield member 32, a guide member 33, a microwave generator 34, an antenna 35, a power supply 38, and the like.

[Heating chamber]
The housing 31 has a heating chamber 310 that removably accommodates the tobacco stick 100 from the front end to the rear end. The heating chamber 310 has a cylindrical peripheral wall 312 extending in the insertion/extraction direction (Z direction) of the tobacco stick 100 and having an internal space (hereinafter also referred to as an accommodation cavity) 311 in which the tobacco stick 100 can be inserted/extracted. A disk-shaped rear wall 313 closing the rear end of the peripheral wall 312 is provided so as to define the rear end of the space. A peripheral wall 312 and a rear wall 313 of the heating chamber 310 may be formed integrally with the housing 31 or may be formed separately from the housing 31 and assembled with the housing 31 . An air flow path 36 penetrating from the heating chamber 310 to the outer peripheral surface of the housing 31 is provided in a part of the rear end side of the peripheral wall 312 . The air flow path 36 is a flow path that takes in air from the outside of the non-burning flavor suction device 30 when the tobacco stick 100 is sucked.

The open end of the peripheral wall 312 in the heating chamber 310 is open toward the outside of the housing 31 and serves as an insertion opening 3A for inserting the tobacco stick 100. The tip side of the tobacco stick 100 is inserted into the housing cavity 311 in the heating chamber 310 through the insertion port 3A. In FIG. 4, reference CL indicates the central axis of the accommodation cavity 311 in the insertion/extraction direction of the tobacco stick 100 . Hereinafter, the direction along the central axis CL will also be referred to as the axial direction.

The tobacco stick 100 inserted into the accommodation cavity 311 is heated by microwaves as described later. A peripheral wall 312 and a rear wall 313 of the heating chamber 310 are made of a material having heat insulation and heat resistance properties so as to withstand this heating and prevent the heat in the housing cavity 311 from diffusing. Materials used for such a heating chamber 310 include, for example, alumina/silica ceramics, and highly heat-resistant resins such as PEEK (polyetheretherketone), PPS (polyphenylene sulfide), and PTFE (polytetrafluoroethylene). can be mentioned.

[Shield member]
A cylindrical shield member 32 is arranged inside the peripheral wall 312 . The outer peripheral surface of the shield member 32 is provided along the inner peripheral surface 361 of the peripheral wall 312 . That is, the shield member 32 is provided along the outer periphery of the accommodation cavity 311 so as to surround the accommodation cavity 311 . The shield member 32 of this embodiment is formed in a cylindrical shape extending along the inserting/extracting direction of the tobacco rod portion 110 with respect to the heating chamber 310 , and is arranged such that the central axis along the inserting/extracting direction coincides with the central axis CL of the accommodation cavity 311 . It is That is, the shield member 32 is provided coaxially with the accommodation cavity 311 and the peripheral wall 312 .

The shield member 32 is connected to the ground within the circuit provided in the non-combustion type flavor inhaling device 30 . The shield member 32 absorbs or reflects microwaves radiated from the antenna 35 and suppresses leakage of the microwaves to the outside of the non-combustion type flavor inhalation device 30 . The shield member 32 absorbs only a small portion of the microwaves radiated from the antenna 35 and reflects most of the microwaves toward the housing cavity 311 . Therefore, the shield member 32 is made of metal such as iron, stainless steel, aluminum, copper, and brass. Also, the shield member 32 may be made of a composite material containing these metals.

[Guide member]
A guide member 33 is disposed inside the shield member 32 and outside the accommodation cavity 311 , that is, between the accommodation cavity 311 and the shield member 32 . The guide member 33 of this embodiment has a tubular shape, and its outer peripheral surface is provided along the inner peripheral surface 321 of the shield member 32 . Further, the guide member 33 is provided so that the center axis along the insertion/removal direction coincides with the center axis CL of the accommodation cavity 311 . That is, the guide member 33 is provided coaxially with the shield member 32 , the accommodation cavity 311 and the peripheral wall 312 .

The guide member 33 of the present embodiment is cylindrical, and has an internal space 340 inside in a cross section perpendicular to the axial direction. The shape of this internal space 340 is formed substantially the same as that of the tobacco stick 100 and forms part of the accommodation cavity 311 . That is, the inner diameter of the guide member 33 is formed substantially the same as the outer diameter of the tobacco stick 100 . Note that the guide member 33 does not have to have a strictly circular cross section perpendicular to the axial direction, but may have a substantially circular shape that allows the tobacco stick 100 to be inserted thereinto. Further, when the shape of the cross section perpendicular to the inserting/removing direction of the tobacco stick 100 is elliptical or rectangular, the guide member 33 has an elliptical cylinder shape or an angular shape so that the internal space 340 has the same shape as the tobacco stick 100 . It may be formed in a columnar shape. In this case, the shield member 32 may similarly be formed in an elliptical columnar shape or a prismatic shape. Accordingly, when the tobacco stick 100 is inserted into the accommodation cavity 311 , the inner peripheral surface 331 of the guide member 33 contacts the outer peripheral surface of the tobacco stick 100 to guide the insertion of the tobacco stick 100 . In addition, since the guide member 33 is formed of a material having a lower thermal conductivity than the shield member 32, the guide member 33 is arranged at a position in contact with the tobacco stick 100 as described above, so that the tobacco stick 100 and the shield are separated from each other. By separating it from the member 32 , the escape of heat to the shield member 32 when the tobacco stick 100 is heated is suppressed.

The guide member 33 has an axial length shorter than that of the housing cavity 311 and is arranged near the insertion port 3A of the heating chamber 310 . That is, the guide member 33 is arranged such that the rear end face 333 is separated from the rear wall (chamber bottom face) 313 located on the side opposite to the insertion port 3A in the inserting/removing direction of the heating chamber 310 . For this reason, in the axial direction of the heating chamber 310 , the guide member 33 is not provided in a portion deeper than the rear end surface 333 of the guide member 33 , and a gap 314 is formed. Although the guide member 33 is made of a material with sufficiently low thermal conductivity, heat diffusion can be suppressed more effectively if the gap 314 is used instead of providing a member that conducts heat. For this reason, in this embodiment, the guide member 33 is provided only in a portion that requires a guide, and is formed so as to minimize the contact area with the tobacco stick 100 . The arrangement of the guide member 33 may be determined in consideration of strength, weight balance, coefficient of thermal expansion, etc., in addition to the heat insulating effect.

In the example of FIG. 4, the guide member 33 has a tubular shape with the same diameter from the side of the insertion opening 3A to the side of the rear wall 313. In addition, the opening on the side of the insertion port 3A may be tapered. As a result, the tobacco stick 100 can be easily inserted, and the inner peripheral surface 331 of the guide member 33 is in contact with the outer peripheral surface of the tobacco stick 100 to properly guide the insertion of the tobacco stick 100 .

In addition, the guide member 33 has a thickness dimension in a direction (radial direction) orthogonal to the insertion/removal direction (axial direction) of the tobacco stick 100 larger than the thickness dimension of the shield member 32. 2.0 mm. In this manner, the guide member 33 is formed thicker than the shield member 32 , thereby suppressing heat escaping to the guide member 33 .

The guide member 33 is a dielectric, and if it excessively absorbs microwaves radiated from the antenna 35, it is conceivable that heating of the tobacco stick 100 by the microwaves is inhibited. For example, the dielectric loss P1 is obtained by the following formula.
P1=K·ε _r ·tan δ·f·E ² [W/m ³ ]
K: 0.556×10 ^-10
ε _r : Relative permittivity of dielectric tanδ: Dielectric loss angle of dielectric f: Frequency [Hz]
E: Electrolytic strength [V/m]

For this reason, the guide member 33 in this embodiment is made of a material having a dielectric constant of 10 or less and a dielectric loss angle of 0.1 or less. FIG. 6 is a diagram showing an example of the material of such a guide member 33. As shown in FIG. Among these, substances having a dielectric constant of 4 or less and a dielectric loss angle of 0.001 or less are particularly preferable. , syndiotactic polystyrene, polyphenylene ether, polyimide, and polyetherimide.

Substances having a relative permittivity of more than 4 and a relative permittivity of 6 or less and a dielectric loss angle of 0.1 or less are next preferred. Materials belonging to Group II include soda glass, steatite, paper, epoxy, polycarbonate, ABS resin (acrylonitrile-butadiene-styrene copolymer synthetic resin), polyacetal, copolyester, polyetheretherketone, polyamideimide, silicone, ethylene propylene diene rubber (EPDM), ethylene propylene rubber (EPM) .

Furthermore, a substance having a dielectric constant of 10 or less and a dielectric loss angle of more than 0.001 and less than or equal to 0.002 may be used. stellite or polypropylene.

In the present embodiment, the guide member 33 is formed using at least one of the materials belonging to Groups I to III, thereby reducing the amount of microwaves absorbed by the guide member 33 and suppressing a decrease in heating efficiency. ing.

The guide member 33 may be made of a single material or may be made of a composite material. For example, the guide member 33 may be formed using a composite material in which a main material such as resin containing glass fiber contains filler or fiber as an additive material. In this case, it is desirable that both the main material and the additive material are selected from Groups I to III, but if the main material is selected from Groups I to III, other materials may be used as the additive material. good. Further, the guide member 33 may be a structural combination of different materials, such as a quartz glass surface coated with a resin, or a quartz glass and resin mesh pasted together. As a result, even if the guide member 33 should break, it is possible to prevent fragments from scattering. When the guide member 33 is arranged inside the shield member 32, the outer peripheral surface of the guide member 33 and the inner peripheral surface 321 of the shield member 32 are adhered so that the shield member 32 functions as a reinforcing material for the guide member 33. can be made As a result, even if the guide member 33 is cracked, the fragment is supported by the shield member 32 and is prevented from dropping into the accommodation cavity 311 . In this case, even a fragile material can be selected as the material for forming the guide member 33 .

Also, the surfaces of the guide member 33, the shield member 32, and the antenna 35 may be subjected to surface treatment. The surface processing includes surface polishing, application of a coating agent, resin coating, and the like. For example, the surface treatment may be coating with silicone oil or coating with polytetrafluoroethylene. This suppresses the adhesion of dirt to the inner surface of the heating chamber 310 and facilitates cleaning. Further, the guide function of the guide member 33 is improved by improving the slippage of the surface of the guide member 33 by this surface processing. Further, by making the surface of the antenna 35 slippery, the load on the antenna 35 when inserting the tobacco stick 100 can be suppressed, and the insertion of the tobacco stick 100 can be facilitated.

[Microwave generator]
FIG. 7 is a diagram showing the configuration of the microwave generator 34. As shown in FIG. The microwave generator 34 is mounted on a circuit board, for example, and includes an oscillator 341 , an isolator 342 , a power monitor 343 and a power controller 344 . The oscillator 341 is, for example, a semiconductor type or magnetron type microwave oscillator, and generates microwaves of a predetermined frequency. The microwave frequency is not particularly limited, but may be, for example, 2.40 to 2.50 GHz. The microwave generator 34 of this embodiment generates microwaves of 2.45 GHz. The isolator 342 absorbs microwaves reflected within the main body 3 and suppresses backflow to the oscillator. The power monitor 343 measures applied power and reflected power to the microwave generator 34 . The power control unit 344 controls the power supplied to the microwave generation unit 34 according to the user's suction action (puff) or the like. The power supply 38 is, for example, a rechargeable secondary battery, and supplies power to the circuits provided in the main body 3 .

[antenna]
The antenna 35 receives power from the microwave generation section 34 and emits microwaves when the non-combustion type flavor inhalation device 30 is in operation (during heating). The antenna 35 is a rod-shaped member extending along the central axis CL of the accommodation cavity 311 . The antenna 35 protrudes axially from the central portion of the rear wall (chamber bottom surface) 313 of the heating chamber 310 toward the insertion port 3A. Reference numeral 351 denotes the base end portion of the antenna 35 and reference numeral 352 denotes the distal end portion of the antenna 35 . Antenna 35 is arranged coaxially with central axis CL of heating chamber 310 .

The antenna 35 is connected to the microwave generator 34 by, for example, a coaxial cable, and radiates microwaves around it. Since the antenna 35 of this embodiment is rod-shaped, it mainly radiates microwaves radially outward. The antenna length can be appropriately set according to the frequency of the microwaves to be radiated. For example, the antenna length L is preferably a value (L=nλ/4 (n=1, 2, 3, . . . )) obtained by dividing the wavelength λ determined based on the frequency by the natural number n and 1/4. Also, by performing impedance matching according to the antenna length, efficient heating can be achieved. The antenna length L may be 5 mm, for example. Also, the antenna diameter is, for example, 1 mm.

[motion]
When the user inhales using the non-combustion type flavor inhaling device 30 , the tobacco stick 100 is first inserted from the insertion opening 3A of the heating chamber 310 . At this time, the outer peripheral surface of the tobacco stick 100 contacts the inner peripheral surface 331 of the guide member 33 in the heating chamber 310 , and the tip portion of the tobacco stick 100 is inserted along the inner peripheral surface 331 of the guide member 33 . When the tobacco stick 100 is inserted until the tip 102 of the tobacco stick 100 abuts against the rear wall 313 , the antenna 35 projecting from the rear wall 313 is inserted into the tobacco rod portion 110 from the tip 102 of the tobacco stick 100 . be In the present embodiment, since the guide member 33 extends in the same direction as the housing cavity 311 and the antenna 35 , the tobacco rod portion 110 extends along the inner peripheral surface 331 of the guide member 33 along the axial direction of the antenna 35 . It is inserted in a direction and is inserted without receiving excessive load when sticking into the antenna 35. - 特許庁Further, since the guide member 33 is provided coaxially with the accommodation cavity 311 and the antenna 35 , the antenna 35 is accurately inserted into the center of the tobacco stick 100 inserted along the guide member 33 .

Then, when a heating start operation is performed, such as by pressing an operation button (not shown) for starting heating, the microwave generator 34 supplies an alternating current of a predetermined frequency generated by the oscillator 341 to the antenna 35. and radiate microwaves from the antenna 35 . The radiated microwaves generate heat due to the dielectric loss of the moisture, flavor source, and aerosol source in the tobacco rod portion 110, generating aerosol smoke containing tobacco flavor components. Here, when the user sucks the mouthpiece end 101 side of the mouthpiece part 120 in his/her mouth, the inside of the tobacco stick 100 becomes negative pressure, which is introduced into the heating chamber 310 through the air flow path 36 of the heating chamber 310 . The heated air is sucked from the tip 101 of the tobacco rod portion 110 and is sucked by the user together with the aerosol smoke generated by heating.

[effect]
The non-combustion type flavor inhaling device 30 of the present embodiment has an antenna 35 projecting inside a heating chamber 310 that radiates microwaves, and a shield member 32 that surrounds the outer periphery of an internal space (accommodating cavity) 311 of the heating chamber 310. A guide member 33 is provided between the housing cavity 311 and the shield member 32 to guide the insertion of the tobacco stick 100 . The guide member 33 is made of a material having a thermal conductivity lower than that of the shield member 32 . As a result, the non-combustion type flavor sucking device 30 of the present embodiment can suppress the heat diffusing from the tobacco stick 100 through the guide member 33 and efficiently heat the tobacco stick 100 .

In the non-combustion type flavor inhaling device 30 of this embodiment, the guide member 33 is formed using at least one of the materials belonging to Groups I to III described above. As a result, the non-combustion type flavor inhaling device 30 of the present embodiment suppresses the absorption of microwaves by the guide member 33 so that the tobacco stick 100 can be efficiently heated.

The guide member 33 of this embodiment is formed so that the thickness dimension in the direction (radial direction) orthogonal to the insertion/removal direction (axial direction) of the tobacco stick 100 is larger than the thickness dimension of the shield member 32 . As a result, the guide member 33 suppresses heat escaping to the guide member 33 when the tobacco stick 100 is heated, so that the tobacco stick 100 can be efficiently heated.

The guide member 33 of the present embodiment is provided near the insertion port 3A of the heating chamber 310, and a gap 314 is formed behind the rear end surface 333 of the guide member 33 in the axial direction of the accommodation cavity 311. As described above, the non-combustion type flavor inhaling device 30 of the present embodiment is provided with the guide member 33 only in a portion where a guide is required, and by minimizing the contact area between the guide member 33 and the tobacco stick 100, the tobacco can be Heat dissipation is suppressed when the stick 100 is heated, and the tobacco stick 100 can be efficiently heated.

<Modification 1>
FIG. 8 is a schematic configuration diagram of a non-combustion type flavor inhaling device 30A according to Modification 1, and FIG. 9 is a sectional view of the heating chamber 310 along line BB in FIG. This modification differs from the above-described embodiment in that the antenna 35A is plate-shaped (blade-shaped). Since the rest of the configuration is the same, the same elements are given the same reference numerals, and the repetitive description is omitted.

As shown in FIGS. 8 and 9, the antenna 35A of this modification has a planar outer shape, and in a cross section (FIG. 9) orthogonal to the axial direction, the width dimension W1 of the first plane 323 is It is formed larger than the thickness dimension T1 of the antenna 35A in the direction orthogonal to the plane 323 of one. The width dimension W1 and thickness dimension T1 of the antenna 35A can be appropriately set according to the diameter of the tobacco stick 100, the wavelength of the microwave, and the like. For example, the thickness T1 may be 0.5 to 1.0 mm and the width W1 may be 1.0 to 10.0 mm. The configurations of the shield member 32 and the guide member 33 are the same as those of the above-described embodiment.

Even when the antenna 35A is shaped like a plate in this way, the guide member 33 suppresses heat dissipation, so that the tobacco stick 100 can be efficiently heated, as in the above-described embodiment.

<Modification 2>
FIG. 10 is a schematic configuration diagram of a non-combustion type flavor inhaling device 30B according to Modification 2, and FIG. 11 is a cross-sectional view of a heating chamber 310 taken along line CC of FIG. This modification differs from the above-described embodiment in that the guide member 33 has a heat insulating region such as a void or air bubble inside. Since the rest of the configuration is the same, the same elements are given the same reference numerals, and the repetitive description is omitted.

As shown in FIG. 10, the guide member 33B of this modified example has a vacuum layer 335 inside along the insertion/extraction direction of the tobacco rod portion 110 with respect to the heating chamber 310 . The vacuum layer 335 is one form of insulation region in this variation. The heat insulating region is not limited to a vacuum layer, and may be an air layer or a layer of a substance having a lower thermal conductivity than the material of the guide member 33 . Also, the heat insulating region may be a bubble. For example, the heat insulation area may be ensured by forming the guide member 33B with a material having air bubbles. Furthermore, in the examples of FIGS. 10 and 11, the heat insulating region is provided inside the guide member 33B, but the present invention is not limited to this, and a slit may be provided on the surface of the guide member 33B, or unevenness may be provided on the surface of the guide member 33B. Alternatively, the heat-insulating region may be ensured by making the guide member 33 mesh-like or by forming the guide member 33 from a porous material.

FIG. 12 is a diagram showing an example in which unevenness is provided on the housing cavity side surface of the guide member 33B. In the example shown in FIG. 12, the guide member 33B has a convex portion B1 and a concave portion B2 formed on the surface on the accommodation cavity 311 side. This recessed portion B2 serves as a heat insulating region (air layer) between the guide member 33B and the tobacco rod portion 110, and can suppress heat transferred to the guide member 33B.

FIG. 13 is a diagram showing an example in which unevenness is provided on the shield member side surface of the guide member 33B. In the example of FIG. 13, the guide member 33B has a convex portion B1 and a concave portion B2 formed on the surface on the shield member 32 side. This recessed portion B2 serves as a heat insulating region between the guide member 33B and the shield member 32, and can suppress heat escaping from the guide member 33B.

As described above, in the non-combustion type flavor sucking device 30B of this modified example, the guide member 33B has a heat insulating region inside, so that heat can be effectively blocked and the tobacco stick 100 can be efficiently heated.

<Modification 3>
14 is a schematic configuration diagram of a non-combustion type flavor inhaling device 30C according to Modification 3, and FIG. 15 is a cross-sectional view of the heating chamber 310 along line DD in FIG. This modification differs from the above-described embodiment in the configuration of the guide member 33C. Since the rest of the configuration is the same, the same elements are given the same reference numerals, and the repetitive description is omitted.

In the above-described embodiment, the guide member 33 has a cylindrical shape, but in this modified example, as shown in FIG. It is formed in an arc shape, and each guide member 33C is arranged at intervals 336 in the circumferential direction. Each guide member 33C extends in the insertion/removal direction.

In FIG. 15, the space in which the tobacco stick 100 is housed, that is, the outer periphery of the housing cavity 311 is indicated by a chain double-dashed line. As shown in FIG. 15, the inner peripheral surface 331 of each guide member 33C is formed along the outer periphery of the accommodation cavity 311 in a cross section perpendicular to the insertion/removal direction. Therefore, when the tobacco stick 100 is inserted into the accommodation cavity 311, the inner peripheral surface 331 of each guide member 33C contacts the outer peripheral surface of the tobacco stick 100 to guide the insertion of the tobacco stick 100. As shown in FIG. At this time, in the circumferential direction of the accommodation cavity 311, at the intervals 336 between the guide members 33C, the outer peripheral surface of the tobacco stick 100 does not contact the guide members 33C, and an air layer is formed around it. Therefore, the non-combustion type flavor inhaling device 30C of this modified example can further suppress heat dissipation during heating of the tobacco stick 100 and efficiently heat the tobacco stick 100 .

<Others>
The configurations described in the above-described embodiments and modified examples can be combined as much as possible without departing from the subject and technical idea of the present invention.

30, 30A, 30B, 30C: non-combustible flavor suction device 31: housing 32: shield members 33, 33B, 33C: guide member 34: microwave generators 35, 35A: antenna 38: power source 100: tobacco stick 110: tobacco Rod Part 120: Mouthpiece Part 200: Non-combustion Flavor Inhalation System 310: Heating Chamber 311: Receiving Cavity 312: Peripheral Wall 313: Back Wall 314: Air Gap

Claims (13)

A non-combustion type flavor suction device that heats a flavor stick having a rod portion by a microwave heating method,
a heating chamber having an internal space capable of accommodating the rod portion in a detachable manner;
an antenna that protrudes inside the heating chamber and radiates microwaves, the antenna being inserted into the rod portion from the tip side of the rod portion when the rod portion is inserted into the heating chamber;
a shield member disposed along the outer periphery of the internal space and suppressing leakage of microwaves radiated from the antenna to the outside of the device during operation;
The shield member is disposed between the inner space of the heating chamber and the shield member, and guides the insertion of the rod portion by contacting at least a portion of the outer peripheral surface of the rod portion when the rod portion is inserted into the heating chamber. a guide member for
with
The guide member is a dielectric, and the thermal conductivity of the guide member is lower than that of the shield member.
Non-combustion flavor suction device. The non-combustion type flavor inhalation device according to claim 1, wherein the guide member is made of a material having a dielectric constant of 10 or less and a dielectric loss angle of 0.1 or less. The non-combustion type flavor inhalation device according to claim 1, wherein the guide member is made of a material having a dielectric constant of 4 or less and a dielectric loss angle of 0.001 or less. The guide member is quartz glass, polytetrafluoroethylene, polyethylene, polyethylene terephthalate, polylactic acid, syndiotactic polystyrene, polyphenylene ether, polyimide, polyetherimide, soda glass, steatite, paper, epoxy, polycarbonate, ABS resin. (acrylonitrile butadiene styrene copolymer synthetic resin), polyacetal, copolyester, polyether ether ketone, polyamideimide, silicone, ethylene propylene diene rubber (EPDM), ethylene propylene rubber (EPM), alumina, borosilicate glass, forsterite, polypropylene 3. The non-combustion type flavor inhalation device according to claim 1 or 2, which is formed by either one of or a combination of these. 5. The non-combustion type according to any one of claims 1 to 4, wherein the thickness dimension of the guide member in a direction orthogonal to the insertion/extraction direction of the rod portion with respect to the heating chamber is larger than the thickness dimension of the shield member. Flavor suction device. The thickness dimension of the guide member is 0.5 mm to 2.0 mm,
The non-combustion type flavor inhalation device according to claim 5. The antenna is rod-shaped or plate-shaped, protrudes into the heating chamber from the bottom surface of the heating chamber opposite to the rod insertion opening end, and extends along the central axis of the heating chamber. The non-combustion type flavor inhalation device according to any one of claims 1 to 6. The antenna is arranged coaxially with the central axis of the heating chamber,
The non-combustion type flavor inhalation device according to claim 7. The guide member has voids or air bubbles inside, or has an air layer between the rod portion or the shield member,
The non-combustion type flavor inhalation device according to any one of claims 1 to 8. The guide member has a vacuum layer inside along the insertion/extraction direction of the rod portion with respect to the heating chamber,
The non-combustion type flavor inhalation device according to any one of claims 1 to 9. The guide member is arranged at a position spaced apart from the bottom surface of the heating chamber located on the opposite side of the rod insertion port end,
A gap is formed between the rear end surface of the guide member located on the chamber bottom surface side and the chamber bottom surface,
The non-combustion type flavor inhalation device according to any one of claims 1 to 10. The non-combustion type flavor inhalation device according to any one of claims 1 to 11, wherein the shield member and the guide member have a tubular shape extending along the insertion/extraction direction of the rod portion with respect to the heating chamber. . the shield member has a cylindrical shape extending along the insertion/extraction direction of the rod portion with respect to the heating chamber;
A plurality of the guide members are provided at intervals in the circumferential direction of the inner peripheral surface of the shield member,
The non-combustion type flavor inhalation device according to any one of claims 1 to 12.

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