HK1245595B - Flavor inhaler and inside holding member - Google Patents

Description

Fragrance inhaler and inner retaining component

Technical Field

The present invention relates to a fragrance inhaler extending from an ignition end to a non-ignition end, and an inner retaining component suitable for the fragrance inhaler.

Background Art

A flavor inhaler (smoking article) has been proposed as an alternative to cigarettes, allowing users to enjoy flavor without burning a flavor source such as tobacco. Patent Document 1 discloses a flavor inhaler equipped with a combustion-type heat source and an aerosol-generating source. The combustion-type heat source is located at the ignition end of the flavor inhaler. The aerosol-generating source is located closer to the non-ignition end than the combustion-type heat source. The aerosol-generating source generates aerosol based on the heat generated by the combustion-type heat source.

Prior art literature

Patent Literature

Patent Document 1: International Publication No. 2013/120855

Summary of the Invention

The key point of the first feature is to provide a fragrance inhaler, which has: a cylindrical holding member extending from the ignition end to the non-ignition end; a combustion-type heat source, which is arranged at the ignition end; a fragrance source, which is arranged on the non-ignition end side relative to the combustion-type heat source; an inner holding member, which is arranged in the cylindrical holding member and at least holds the fragrance source; an inlet, which introduces air into the fragrance source, the inner holding member having a cylindrical first side wall surrounding at least a part of the fragrance source, and the cylindrical holding member having a A second cylindrical side wall has a through-hole that is fluidically connected to the outside air, and is provided with: a first flow path that connects the through-hole and the inlet and passes between the first side wall and the second side wall; a second flow path that connects the inlet for absorbing the fragrance generated in the fragrance source and the fragrance source, and is provided with a flow path forming member that is formed so that the length of the portion of the first flow path corresponding to the periphery of the fragrance source, i.e., the fragrance source peripheral section, is longer than the shortest path connecting the portion where the fluid flows into the fragrance source peripheral section and the inlet. In addition, a portion of the inner retaining member provided within the cylindrical retaining member may also extend to the outside of the cylindrical retaining member. The "inlet" is not only a hole formed in the cylindrical first side wall, but also includes the concept of an opening at the end of the cylindrical first side wall. Therefore, the "inlet" may also be formed by the gap between the inner retaining member and the combustion-type heat source.

The key point of the second feature is that, in the flavor inhaler of the first feature, when a path connecting the first flow path and the second flow path also exists other than a path passing through the flavor source, the fluid resistance of the path connecting the first flow path and the second flow path that passes through the flavor source is smaller than the fluid resistance of the path that does not pass through the flavor source.

The gist of the third feature is that, in the flavor inhaler of the first or second feature, the opening on the ignition end side of the cylindrical holding member is blocked.

The gist of a fourth feature is that, in the flavor inhaler according to any one of the first to third features, the through-hole is provided closer to the ignition end side than the end portion of the flavor source on the non-ignition end side.

The key point of the fifth feature is that in the flavor inhaler according to any one of the first to fourth features, the inlet is provided closer to the ignition end than the through-port, and the first flow path is provided only closer to the ignition end than the end portion of the flavor source on the non-ignition end side.

The gist of the sixth feature is that, in the flavor inhaler according to any one of the first to fifth features, the second flow path has a cavity for diffusing the flavor.

The gist of the seventh feature is that, in the flavor inhaler according to any one of the first to sixth features, the flow path forming member includes at least one member provided between the first side wall and the second side wall.

The gist of the eighth feature is that, in the flavor inhaler according to any one of the first to seventh features, the flow path forming member includes a spiral member.

The gist of the ninth feature is that, in the flavor inhaler according to any one of the first to eighth features, the flow path forming member includes a spiral member wound around the first side wall.

The essence of the tenth feature is that, in the flavor inhaler according to any one of the first to ninth features, the flow path forming member includes a member having an opening portion opened at at least one location and extending along the circumferential direction of the first side wall, and the at least one opening portion is offset in the circumferential direction relative to at least one of the through-portion and the inlet.

The essence of the eleventh feature is that, in the flavor inhaler according to any one of the first to fourth features, the flow path forming member includes a protrusion or a groove integrally formed on the outer surface of the first side wall or the inner surface of the second side wall. The protrusion or the groove only needs to be formed so as to form a flow path between the first side wall and the second side wall.

The gist of the twelfth feature is that, in the flavor inhaler according to the eleventh feature, the protrusion or the groove is formed in a spiral shape.

The key point of the thirteenth feature is that the fragrance inhaler according to any one of the first to twelfth features includes a separator that separates the first flow path from the inhalation port. The separator may or may not completely separate the first flow path from the second flow path. If the separator does not completely separate the first flow path from the second flow path, the separator only needs to be configured so that the fluid resistance of the path connecting the first and second flow paths that passes through the fragrance source is smaller than the fluid resistance of the path that does not pass through the fragrance source.

The gist of the fourteenth feature is that, in the flavor inhaler of the thirteenth feature, the separator extends between the first side wall and the second side wall along the circumferential direction of the first side wall.

The key point of the fifteenth feature is that in the flavor inhaler of any one of the first to fourteenth features, the inner retaining component is configured to retain the combustion-type heat source and the flavor source, the inner retaining component has a claw portion that protrudes toward the inner side of the first side wall and locks the combustion-type heat source, and the inlet is formed on the non-ignition end side of the first side wall relative to the contact point between the claw portion and the combustion-type heat source.

The gist of the sixteenth feature is that, in the flavor inhaler according to the fifteenth feature, the introduction port is adjacent to the non-ignition end side relative to the contact point between the claw portion and the combustion-type heat source.

The gist of the seventeenth feature is that, in the flavor inhaler according to any one of the first to sixteenth features, the first side wall has a tapered shape that enters the inside of the first side wall from the ignition end side toward the non-ignition end side.

The key point of the eighteenth feature is that in the fragrance inhaler according to any one of the first to seventeenth features, the inner retaining member has a bottom portion that supports the end surface on the non-ignition side of the fragrance source, a vent is formed in the portion of the inner retaining member on the non-ignition side, and the inlet is located closer to the ignition side than the periphery of the fragrance source or the fragrance source. The fragrance source can also be composed of particles. In this case, the end surface on the non-ignition side of the fragrance source refers to the surface formed by the portion of the plurality of particles arranged closest to the non-ignition side, and refers to the surface in contact with the bottom portion of the inner retaining member.

The gist of the nineteenth feature is that, in the flavor inhaler according to any one of the first to eighteenth features, the second side wall has a heat transfer member that covers at least a portion of the first side wall and extends further toward the non-ignition end than the first side wall.

The gist of the twentieth feature is that, in the flavor inhaler according to any one of the first to nineteenth features, the inner holding member is integrally formed with a heat transfer member.

The key point of the twenty-first feature is to provide an inner retaining component, which is suitable for a fragrance inhaler having a combustion-type heat source and a fragrance source, and at least retains the fragrance source, wherein it has: a cylindrical first side wall, which surrounds at least a portion of the fragrance source; an inlet, which introduces air into the interior of the first side wall; a flow path forming component, which is formed so that when the inner retaining component is arranged in a cylindrical retaining component having a second side wall with a through hole fluidically connected to the external air, the length of the portion of the first flow path connecting the through hole and the inlet and passing through the first side wall and the second side wall corresponding to the outer periphery of the fragrance source, that is, the fragrance source peripheral section, is longer than the shortest path connecting the part where the fluid flows into the fragrance source peripheral section and the inlet.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a side view of a first embodiment of a fragrance inhaler;

FIG2 is a cross-sectional view of the fragrance inhaler taken along line 2A-2A of FIG1 ;

FIG3 is a cross-sectional view of the aroma inhaler taken along line 3A-3A of FIG1 ;

FIG4 is a top view of an inner holding member provided in a cylindrical holding member;

FIG5 is a sectional view of the inner retaining member taken along line 5A-5A of FIG4;

6 is a plan view of the inner retaining member and the flow path forming member of the first modified example;

7 is a plan view of the inner retaining member and the flow path forming member of the first modified example, from the side opposite to that of FIG. 6 ;

8 is a plan view of an inner retaining member and a flow path forming member according to a second modified example;

9 is a plan view of the inner retaining member and the flow path forming member of the third modified example;

10 is a diagram of an inner retaining member and a flow path forming member according to a fourth modified example;

FIG11 is a cross-sectional view of a second embodiment of the fragrance inhaler;

FIG12 is a cross-sectional view of a fragrance inhaler according to a third embodiment;

13 is a cross-sectional view of a fourth embodiment of the flavor inhaler;

FIG14 is a cross-sectional view of a flavor inhaler according to a fifth embodiment.

DETAILED DESCRIPTION

The following describes the embodiment. In addition, in the following description of the drawings, the same or similar parts are given the same or similar reference numerals. However, the drawings are schematic, and it should be noted that the ratio of each dimension and the like may differ from the actual ones.

Therefore, specific dimensions and the like should be determined in consideration of the following description. Furthermore, the drawings naturally include portions where the relationship or ratio of dimensions differ from one another.

[Overview of Embodiments]

The fragrance inhaler of the embodiment comprises: a cylindrical holding member extending from an ignition end to a non-ignition end; a combustion-type heat source provided at the ignition end; a fragrance source provided at the non-ignition end side relative to the combustion-type heat source; an inner holding member provided within the cylindrical holding member and holding at least the fragrance source; an inlet for introducing air into the fragrance source, the inner holding member having a cylindrical first side wall surrounding at least a portion of the fragrance source, and the cylindrical holding member having a cylindrical second side wall surrounding the first side wall. side wall, the second side wall has a through-port fluidically connected to the external air, and is provided with: a first flow path, which connects the through-port and the inlet and passes between the first side wall and the second side wall; a second flow path, which connects the suction port for absorbing the fragrance generated in the fragrance source and the fragrance source, and is provided with a flow path forming component, which is formed so that the length of the portion of the first flow path corresponding to the periphery of the fragrance source, that is, the fragrance source peripheral interval, is longer than the shortest path connecting the part where the fluid flows into the fragrance source peripheral interval and the inlet.

In addition, the inner retaining component of the embodiment is suitable for a fragrance inhaler having a combustion-type heat source and a fragrance source, and at least retains the fragrance source, wherein it has: a cylindrical first side wall that surrounds at least a portion of the fragrance source; an inlet that introduces air into the interior of the first side wall; a flow path forming component that is formed so that when the inner retaining component is arranged in a cylindrical retaining component having a second side wall with a through-port that is fluidically connected to the external air, the length of the portion of the first flow path that connects the through-port and the inlet and passes through the first side wall and the second side wall, that is, the fragrance source peripheral section, corresponding to the periphery of the fragrance source, is longer than the shortest path connecting the part where the fluid flows into the fragrance source peripheral section and the inlet.

In an embodiment, the flow path forming member is formed so that the portion of the first flow path corresponding to the periphery of the fragrance source, i.e., the section surrounding the fragrance source, is longer than the shortest path connecting the portion where the fluid flows into the section surrounding the fragrance source and the inlet. This increases the length of the first flow path, i.e., the length of the flow path from the through-port to the fragrance source. Therefore, when the user is not inhaling, the fragrance from the fragrance source is prevented from flowing through the first flow path and out of the through-port.

[First embodiment]

(Fragrance Inhaler)

The following describes a first embodiment of a fragrance inhaler. Figure 1 is a side view of the fragrance inhaler 10 according to the first embodiment. Figure 2 is a cross-sectional view of the fragrance inhaler 10 taken along line 2A-2A in Figure 1 . Figure 3 is a cross-sectional view of the fragrance inhaler 10 taken along line 3A-3A in Figure 1 . The fragrance inhaler 10 includes a cylindrical retaining member 30, an inner retaining member 50, a combustion-type heat source 70, and a fragrance source 90.

The cylindrical retaining member 30 extends from the ignition end E1 to the non-ignition end E2. The ignition end E1 is the end on which the combustion-type heat source 70 is provided. The non-ignition end E2 is the end on which the suction port 40 is provided. The suction port 40 is located at a place where the user holds the mouth in order to inhale the fragrance. The cylindrical retaining member 30 may also have, for example, a cylindrical shape or a square cylindrical shape. Preferably, the opening on the ignition end E1 side of the cylindrical retaining member 30 is blocked. In this embodiment, at least the inner retaining member 50 and the combustion-type heat source 70 block the opening on the ignition end E1 side of the cylindrical retaining member 30. In this way, the fragrance inhaler 10 is preferably constructed so that gas does not flow into the cylindrical retaining member 30 from the opening on the ignition end E1 side of the cylindrical retaining member 30.

The inner retaining member 50 is provided in the cylindrical retaining member 30. However, a portion of the inner retaining member 50 may also extend to the outside of the cylindrical retaining member 30. The inner retaining member 50 retains at least a portion of the combustion-type heat source 70 and at least a portion of the fragrance source 90. The inner retaining member 50 has a cylindrical first side wall 51 and an inlet 55. The first side wall 51 surrounds at least a portion of the fragrance source 90 and at least a portion of the combustion-type heat source 70. Alternatively, the first side wall 51 surrounds at least a portion of the fragrance source 90 without surrounding the combustion-type heat source 70. The inlet 55 is provided to introduce air into the fragrance source 90 in the first side wall 51. The inlet 55 may also be composed of a hole formed in the first side wall 51.

The combustion type heat source 70 is provided on the ignition end E1 side of the cylindrical retaining member 30. The combustion type heat source 70 is composed of a combustible substance. For example, the combustible substance includes a carbon material, a non-combustible additive, a binder (organic binder or inorganic binder) and a mixture containing water. As the carbon material, it is preferable to use a material from which volatile impurities are removed by heat treatment or the like. When the total weight of the combustion type heat source 70 is set to 100 weight%, the combustion type heat source 70 preferably contains a carbonaceous material in the range of 30 weight % to 70 weight %, and more preferably contains a carbonaceous material in the range of 35 weight % to 45 weight %.

The combustion-type heat source 70 is designed so that the portion on the ignition end E1 side burns, but the end on the non-ignition end E2 side does not burn. In other words, the end on the non-ignition end E2 side of the combustion-type heat source 70 constitutes the non-combustion portion, and the portion other than the non-combustion portion of the combustion-type heat source 70 constitutes the combustion portion.

The aroma source 90 is located inside the cylindrical retaining member 30, closer to the non-ignition end E2 than the combustion-type heat source 70. The aroma source 90 may also be adjacent to the combustion-type heat source 70. The aroma source 90 is configured to generate aroma without combustion. Specifically, the aroma source 90 generates aroma when heated by the combustion-type heat source 70.

Flavor source 90 can be, for example, tobacco raw material. In this case, flavor source 90 may include ordinary shredded tobacco used in cigarettes or granulated tobacco used in snuff. Flavor source 90 may also contain glycerin and/or propylene glycol in addition to tobacco raw material. Flavor source 90 may also include fragrances.

The cylindrical retaining member 30 includes a cylindrical second side wall 32 surrounding the first side wall 51 of the inner retaining member 50. The second side wall 32 may extend long from the ignition end E1 side toward the non-ignition end E2 side. The second side wall 32 may also include, for example, a paper tube formed by deforming a rectangular thick paper into a cylindrical shape.

At least the first side wall 51 of the inner retaining member 50 may also be formed of a heat transfer component. Furthermore, the inner retaining member 50 is preferably formed integrally with the heat transfer component. The thermal conductivity of the heat transfer component at room temperature is preferably 10 W/(m·K) or greater in the direction from the ignition end E1 toward the non-ignition end E2. The heat transfer component can be made of, for example, stainless steel. For example, SUS430 can be used. When the inner retaining member 50 is made of stainless steel, the thickness of the first side wall 51 of the inner retaining member 50 is preferably 0.1 mm or less.

The second side wall 32 of the cylindrical retaining member 30 may include a first heat transfer member 33 facing the inner retaining member 50. The first heat transfer member 33 is arranged so as to cover at least a portion of the first side wall 51 of the inner retaining member 50. The first heat transfer member 33 does not need to be in direct contact with the combustion-type heat source 70.

The first heat transfer member 33 facilitates heat transfer from the combustion-type heat source 70 to the fragrance source 90. The first heat transfer member 33 preferably extends closer to the non-ignition end E2 than the end surface of the inner retaining member 50 on the non-ignition end E2 side. The first heat transfer member 33 is preferably formed of a metal material with excellent thermal conductivity. The thermal conductivity of the first heat transfer member 33 is preferably higher than that of the first side wall 51. For example, the first heat transfer member 33 is formed of aluminum.

The second side wall 32 of the cylindrical holding member 30 has a through-hole 34 that is fluidly connected to the outside air. The through-hole 34 may be provided closer to the ignition end E1 than the end of the flavor source 90 on the non-ignition end E2 side.

A flow path forming member 60 is provided at least between the first side wall 51 and the second side wall 32. The flow path forming member 60 forms a first flow path 36 for allowing external air to flow to the fragrance source 90 within the cylindrical retaining member 30. Alternatively, the flow path forming member 60 may be formed by a member different from the first side wall 51 or the second side wall 32. Alternatively, the flow path forming member 60 may be formed by a member integrally formed with the first side wall 51 or the first side wall 32. The first flow path 36 connects the through-opening 34 of the second side wall 32 and the inlet 55 of the inner retaining member 50, and passes between the first side wall 51 and the second side wall 32.

The inner retaining member 50 may also have a heat transfer member (not shown) provided on the outer surface of the first side wall 51. The heat transfer member may also be configured in a manner that covers at least a portion of the first side wall 51 of the inner retaining member 50, as in the case of the first heat transfer member 33. The heat transfer member promotes heat transfer from the combustion-type heat source 70 to the fragrance source 90. The heat transfer member is preferably formed of a metal material with excellent heat conductivity, such as aluminum. In the case where the inner retaining member 50 has a heat transfer member adjacent to the outer surface of the first side wall 51, the first heat transfer member 33 may not be provided. In this case, the flow path forming member 60 may also be provided between the heat transfer member on the outer surface of the first side wall 51 and the second side wall 32.

A second flow path 38 is provided within the cylindrical retaining member 30 for directing the fragrance generated by the fragrance source 90 toward the inhalation port 40. The second flow path 38 connects the inhalation port 40, which absorbs the fragrance generated by the fragrance source 90, with the fragrance source 90. The inlet 55 of the inner retaining member 50 may also be located closer to the ignition end E1 than the through-opening 34 of the cylindrical retaining member 30. Furthermore, the first flow path 36 is preferably provided only at the end of the fragrance source 90 on the non-ignition end E2 side, closer to the ignition end E1.

During the inhalation action performed by the user, external air flows into the first flow path 36 from the through-hole 34 (arrow F1 in Figure 2). Then, the external air reaches the fragrance source 90 via the inlet 55 (arrow F2 in Figure 2). The external air passing through the first flow path 36 does not contact the combustion part of the combustion-type heat source 70, but reaches the fragrance source 90. The air reaching the fragrance source 90 passes through the second flow path 38 together with the fragrance and reaches the suction port 40 (arrows F3 and F5 in Figure 2). The fragrance source 90 is heated by the combustion-type heat source 70, and therefore, the gas flowing into the second flow path 38 through the fragrance source 90 becomes high temperature.

The cylindrical holding member 30 has a hole 39 (hereinafter referred to as a “vent”) for allowing external air to flow directly into the second flow path 38. Here, “directly flow” means that external air flows into the second flow path 38 without passing through the fragrance source 90.

The vent 39 may also be formed in such a manner that gas flows in a direction intersecting the direction in which the second flow path 38 extends (arrow F4 in FIG2 ). For example, the vent 39 allows gas to flow in toward the central axis of the second flow path 38 in a direction approximately perpendicular to the direction in which the second flow path 38 extends. A plurality of vents 39 are preferably provided at intervals along the circumference of the tubular retaining member 30. In this case, the intervals between the vents 39 may also be constant. The vent 39 may also be provided at the center CL of the tubular retaining member 30 relative to the direction in which the second flow path 38 extends, on the side opposite to the suction port 40. The vent 39 is preferably provided between the first heat transfer member 33 and the cooling layer 80.

Each of the plurality of vent holes 39 is preferably arranged at a position that is not opposed to another of the plurality of vent holes 39, and more preferably, is arranged at a position offset from a straight line connecting the other of the plurality of vent holes 39 and the central axis CA of the cylindrical retaining member 30 (see FIG3 ). In this case, no vent hole 39 is arranged on the opposite side of the vent hole 39 from the central axis CA of the cylindrical retaining member 30. Furthermore, the plurality of vent holes 39 are preferably arranged at the same position along the central axis CA of the cylindrical retaining member 30. However, the plurality of vent holes 39 may be arranged offset from one another along the central axis CA of the cylindrical retaining member 30.

The cooling layer 80 is a layer that cools the aroma generated by the aroma source 90. The cooling layer 80 is provided on the inner surface of the cylindrical retaining member 30 and faces the second flow path 38. The cooling layer 80 is preferably located in at least a portion of the second flow path 38, surrounding the second flow path 38. The cooling layer 80 is preferably located only downstream of the aroma source 90. The thickness of the cooling layer 80 is preferably such that the fluid resistance of the second flow path 38 is not significantly increased. Although it depends on the diameter of the second flow path 38, the thickness of the cooling layer 80 is preferably not less than 5 μm and not more than 500 μm, for example. In addition, in the cross section of the cylindrical retaining member 30 perpendicular to the central axis CA, the ratio of the cross-sectional area of the cooling layer 80 to the cross-sectional area of the inner side of the inner wall of the cylindrical retaining member 30 is preferably not less than 0.2% and not more than 45%, and more preferably not less than 0.5% and not more than 5%. For example, in a cross section of the cylindrical retaining member 30 perpendicular to the central axis CA, the outer diameter of the cylindrical retaining member 30 may be 5 mm to 8 mm, the thickness of the cylindrical retaining member 30 may be 0.15 mm to 0.5 mm, and the thickness of the cooling layer 80 may be 0.05 mm to 0.5 mm.

In the first embodiment, the cooling layer 80 is provided only downstream of the vent hole 39. That is, the cooling layer 80 does not reach the upstream side of the vent hole 39. Alternatively, a portion of the cooling layer 80 may reach the upstream side of the vent hole 39. In other words, at least a portion of the cooling layer 80 only needs to be provided downstream of the vent hole 39.

The cooling layer 80 preferably has a length equal to or greater than half the length of the second flow path 38 in the direction in which the first flow path 38 extends. The cooling layer 80 is preferably separated from the first heat transfer member 33 constituting the cylindrical holding member 30.

Preferably, the cooling layer 80 defines a single passage within the cylindrical retaining member 30 for passage of the fragrance. More preferably, the interior of the cooling layer 80 is hollow. Here, "the interior of the cooling layer 80 is hollow" means that, apart from the filter 42 provided at the inlet 40, no other components exist within the cooling layer 80. In this case, the volume of the hollow portion within the second flow path 38 can be increased. In this embodiment, the cooling layer 80 defines a single passage within the cylindrical retaining member 30, and the interior of the cooling layer 80 is hollow.

In the first embodiment, the interior of the cooling layer 80 is hollow. Alternatively, any component may be disposed within the cooling layer 80 to a degree that does not significantly increase the flow resistance of the second flow path 38. For example, a cylindrical component may be disposed along the central axis of the second flow path. Another cooling layer may also be disposed on the outer circumference of the cylindrical component.

The cooling layer 80 may also include a second heat transfer component. The second heat transfer component may also be a metal. As an example, the cooling layer 80 may be composed of a metal tube. Alternatively, the cooling layer 80 may also be composed of a metal-laminated paper including paper and a metal layer laminated to the paper. As the above-mentioned metal, aluminum, for example, may be used. In addition, instead of these metals, the cooling layer 80 may also be a layer containing polylactic acid (PLA). In addition, the cooling layer 80 may also be formed of the same material as the first heat transfer component 33 constituting the cylindrical retaining member 30.

To increase the surface area of the cooling layer 80, the cooling layer 80 may also have a plurality of concave and convex portions. Such concave and convex portions can be formed, for example, by corrugating the surface of the cooling layer 80. These concave and convex portions can increase the heat exchange surface area of the cooling layer 80 without reducing the cross-sectional area of the second flow path 38.

(Detailed Structure of Inner Holding Member and Flow Path Forming Member)

The detailed structures of the inner retaining member 50 and the flow path forming member 60 are described below using Figures 2, 4, and 5. In addition, in Figure 4, for convenience, the position of the through-opening 34 formed in the second side wall 32 is indicated by a dotted line. The inner retaining member 50 includes a first side wall 51 and a claw portion 54. The first side wall 51 has a cylindrical shape. The first side wall 51 may also have a tapered shape that extends into the interior of the first side wall 51 from the ignition end E1 side toward the non-ignition end E2 side.

The claw portion 54 has a shape that protrudes from the inner surface of the first side wall 51 to the inner side of the inner retaining member 50. The claw portion 54 engages the combustion-type heat source 70. In the first embodiment, the claw portion 54 engages the end surface of the combustion-type heat source 70. However, the position where the claw portion 54 engages is not limited to the end surface of the combustion-type heat source 70.

The claw portion 54 is not particularly limited, but is preferably composed of a pair of claw portions 54 facing each other. The embodiment is not limited thereto, and the claw portion 54 may be composed of three or more claw portions.

The inner retaining member 50 includes an inlet 55 for introducing air into the fragrance source 90 disposed within the first side wall 51. The inlet 55 may be formed on the non-ignition end E2 side relative to the contact point between the claw 54 and the combustion-type heat source 70. Preferably, the inlet 55 is adjacent to the non-ignition end E2 side relative to the contact point between the claw 54 and the combustion-type heat source 70. More specifically, the claw 54 may protrude inwardly from the edge of the first wall 51 defining the inlet 55.

The inner retaining component 50 may also have a bottom 52. The bottom 52 blocks one of the pair of openings formed by the first side wall 51. The inner retaining component 50 may also have a cup shape formed by the first side wall 51 and the bottom 52. In this case, the inner retaining component 50 can accommodate the fragrance source 90. More specifically, the bottom 52 of the inner retaining component 50 can support the end face on the non-ignition end side of the fragrance source 90. The fragrance source 90 may also be composed of a plurality of particles. In this case, the end face on the non-ignition end E2 side of the fragrance source 90 is a surface composed of the portion closest to the non-ignition end E2 side of the plurality of particles, and refers to the surface in contact with the bottom 52 of the inner retaining component.

The inner retaining member 50 is inserted into the cylindrical retaining member 30 with its bottom 52 positioned on the non-ignition end E2 side and open toward the ignition end E1 side. One or more vents 52A may be provided in the bottom 52. Alternatively, the vents 52A may be formed in the first side wall 51. The vents 52A may also be formed in the portion of the inner retaining member 50 on the non-ignition end side E2. Gas from the fragrance source 90 flowing into the first side wall 51 flows into the second flow path 38 through the vents 52A.

The inner holding member 50 may also include a flange portion 53. The flange portion 53 has a shape that protrudes from the outer periphery of the opening of the inner holding member 50 toward the outside of the inner holding member 50. When the inner holding member 50 is inserted into the cylindrical holding member 30, the flange portion 53 is locked to the outer periphery of the opening of the holding member 30. Alternatively, the inner holding member 50 may not include the flange portion 53.

In the embodiment shown in Figures 4 and 5 , the flow path forming member 60 includes a spiral member 61. The spiral member 61 is wound around the first side wall 51. Alternatively, the spiral member 61 may be attached to the inner surface of the second side wall 32. For example, the flow path forming member 60 may be formed of a spirally formed metal wire.

The flow path forming component 60 is formed so that when the inner retaining component 50 is arranged in the cylindrical retaining component 30 having the second side wall 32, the through port 34 and the inlet port 55 are connected and the length of the portion corresponding to the periphery of the fragrance source 90 in the first flow path 36 between the first side wall 51 and the second side wall 32, that is, the fragrance source peripheral interval L1 is longer than the shortest path L2 connecting the portion where the fluid flows into the fragrance source peripheral interval L1 and the inlet port 55.

In Figures 4 and 5 , at least a portion of the spiral member 61 is located in the area between the through-port 34 and the inlet 55. Thus, the spiral member 61 forms a spiral fragrance source peripheral section L1 between the first side wall 51 and the second side wall 32. Consequently, the first flow path 36 is longer than the shortest path L2 between the through-port 34 and the inlet 55 when the flow path-forming member 60 is absent.

The fragrance inhaler 10 may also include a first separator 68 that separates the first flow path 36 from the inhalation port 40 (or the second flow path 38). In Figures 2, 4, and 5, the first separator 68 is formed by one end of a spiral member 61. Specifically, the one end of the spiral member 61 is located between the first side wall 51 and the second side wall 32, closer to the ignition end E2 than the through-opening 34 of the second side wall 32. The one end of the spiral member 61 preferably extends along the circumference of the first side wall 51. Thus, the one end of the spiral member 61, serving as the first separator 68, prevents gas from flowing directly from the first flow path 36 into the second flow path 38.

Alternatively, the first separator 68 may not completely separate the first flow path 36 and the second flow path 38. In this case, the fluid resistance of the path connecting the first flow path 36 and the second flow path 38, which passes through the fragrance source 90, is preferably lower than the fluid resistance of the path directly from the first flow path 36 to the second flow path 38. Alternatively, the fragrance inhaler may include multiple paths connecting the first flow path 36 and the second flow path 38. In this case, the fluid resistance of the path connecting the first flow path 36 and the second flow path 38, which passes through the fragrance source 90, is preferably lower than the fluid resistance of the other paths connecting the first flow path 36 to the second flow path 38.

The flavor inhaler 10 may also include a second separator 69 to prevent gas leakage from the first flow path 36. The second separator 69, together with the inner retaining member 50 and the combustion-type heat source 70, blocks the opening on the ignition end E1 side of the cylindrical retaining member 30. In Figures 2, 4, and 5, the second separator 69 is formed by the other end of the spiral member 61. Specifically, the other end of the spiral member 61 is located between the first side wall 51 and the second side wall 32, closer to the ignition end E1 than the inlet 55 of the first side wall 51. The other end of the spiral member 61 preferably extends circumferentially along the first side wall 51. Thus, the other end of the spiral member 61, serving as the second separator 69, prevents gas leakage from the ignition end E1 side of the first flow path 36. Furthermore, the second separator 69 may not completely block gas leakage from the ignition end E1 side of the first flow path 36.

In the above embodiment, the separators 68 and 69 are formed by a portion of the spiral member 61. Alternatively, the separators 68 and 69 may be formed by a member different from the spiral member 61. Furthermore, the separators 68 and 69 may be formed by a member integrally formed with the first side wall 51 or the second side wall 32.

(Function and Effect)

In one embodiment of the inner retaining member 50 and the flavor inhaler 10, the flow path forming member 60 is formed so that the portion of the first flow path 36 corresponding to the outer periphery of the flavor source 90, namely, the fragrance source peripheral section L1, is longer than the shortest path L2 connecting the portion where the fluid flows into the fragrance source peripheral section L1 and the inlet 55. This increases the length of the first flow path 36, namely, the length of the flow path from the through-port 34 to the flavor source 90. Therefore, when the user is not taking a puff, the flow of flavor from the flavor source 90 through the first flow path 36 and out of the through-port 34 is suppressed. This also suppresses the generation of sidestream smoke that does not pass through the filter 42 provided in the inhalation port 40.

In addition, the external air moves around the heated fragrance source 90 for a long time until it reaches the fragrance source 90 from the through-hole 34. As a result, heat is conducted from the heated inner retaining component 50 to the external air, etc., and the heated external air can flow into the fragrance source 90. On the other hand, the external air can also play a role in slightly lowering the temperature of the first side wall 51 in the fragrance source peripheral section L1. In this way, excessive heating of the fragrance source 90 in contact with the first side wall 51 can be suppressed. In addition, from the perspective of heating the fragrance source 90 more evenly, the temperature of the external air introduced into the fragrance source 90 can also be increased by increasing the fragrance source peripheral section L1.

According to one embodiment, the fluid resistance of the path connecting the first flow path 36 and the second flow path 38, which passes through the fragrance source 90, is smaller than the fluid resistance of the path not passing through the fragrance source 90. Therefore, during a puff taken by the user, most of the external air flowing in through the through-port 34 flows from the first flow path 36 through the inlet 55 to the fragrance source 90, and then flows into the second flow path 38 together with the fragrance generated by the fragrance source 90.

According to one embodiment, the opening on the ignition end E1 side of the cylindrical holding member 30 is blocked. Thus, during a puff by the user, external air is introduced into the flavor source 90 mainly from the through-hole 34 via the first flow path 36 .

According to one embodiment, the through-hole 34 is provided closer to the ignition end E1 than the non-ignition end E2 of the flavor source 90. This prevents the user from blocking the through-hole 34 with their fingers during the puffing action.

According to one embodiment, the inlet 55 is provided closer to the ignition end E1 than the through-port 34, and the first flow path 36 is provided only closer to the ignition end E1 than the end portion of the flavor source 90 on the non-ignition end E2 side. This reduces the possibility of the user crushing the first flow path 36 with their fingers during a puff.

According to one embodiment, the second flow path 38 includes a cavity for diffusion of fragrance. This allows for the diffusion of fragrance passing through the fragrance source 90 while efficiently cooling the air. Furthermore, in this embodiment, the first flow path 36 is preferably positioned closer to the ignition end E1 than the end on the non-ignition end E2 side of the fragrance source 90. This maximizes the volume of the second flow path (cavity) 38 downstream of the fragrance source 90, further improving the cooling efficiency of the gas within the second flow path 38 without significantly increasing the outer diameter of the fragrance inhaler.

According to one embodiment, a first separator 68 is provided to separate the first flow path 36 from the suction port 40. The first separator 68 may also extend along the circumference of the first side wall 51, between the first side wall 51 and the second side wall 32. Due to the first separator 68, during a user's inhalation, most or all of the external air flowing in from the through-port 34 flows from the first flow path 36 through the inlet 55 to the fragrance source 90, and then flows into the second flow path 38 together with the fragrance generated by the fragrance source 90.

According to one embodiment, the inner retaining member 50 includes a claw portion 54 that protrudes inwardly from the first side wall 51 and engages the combustion-type heat source 70. An inlet 55 is formed on the non-ignition end of the first side wall 51, relative to the contact point between the claw portion 54 and the combustion-type heat source 70. The claw portion 54 allows for appropriate control of the insertion length of the combustion-type heat source 70 and, consequently, the length of the fragrance source 90.

According to one embodiment, the introduction port 55 is adjacent to the non-ignition end of the contact point between the claw portion 54 and the combustion-type heat source 70. Since the claw portion 54 and the introduction port 55 are adjacent to each other, the claw portion 54 and the introduction port 55 can be formed using the same process. Specifically, by making a portion of the first side wall 51 protrude from the first side wall 51, the claw portion 54 that can lock the combustion-type heat source 70 and the introduction port 55 adjacent to the claw portion 54 can be formed simultaneously.

According to one embodiment, the first side wall 51 has a tapered shape that extends from the ignition end E1 toward the non-ignition end E2. Thus, the tapered first side wall 51 can support the side surfaces of the combustion heat source 70 and/or the flavor source 90.

According to one embodiment, the inner retaining member 50 has a bottom 52 that supports the end surface of the non-ignition end E2 side of the fragrance source 90. A vent 52A is formed in the portion of the inner retaining member 50 on the non-ignition end E2 side. Furthermore, an inlet 55 is provided around the fragrance source 90 or closer to the ignition end E1 side than the fragrance source 90. The inner retaining member 50 is formed into a cup shape having a first sidewall 51 and a bottom 52. This allows the inner retaining member 50 to more reliably retain the fragrance source 90. In particular, when the fragrance source 90 is formed from a plurality of fragrance sheets, such as granular sheets, the inner retaining member 50 can still retain the fragrance source 90.

According to one embodiment, the second side wall 32 covers at least a portion of the first side wall 51 and has a heat transfer component 33 that extends toward the non-ignition end E2 side than the first side wall 51. The heat transfer component 33 can efficiently transfer the heat generated by the combustion-type heat source 70 to the flavor source 90. In addition, since the heat transfer component 33 extends toward the non-ignition end E2 side than the first side wall 51, the heat of the heat transfer component 33 is dissipated at the front end portion protruding from the first side wall 51. Thus, excessive heating of the first side wall 51 is suppressed. The heat transfer component 33 is preferably formed of a material having a higher thermal conductivity than that of the first side wall 51. The first side wall 51 is preferably formed of a material having a higher corrosion resistance to carbon materials than that of the heat transfer component 33.

According to one embodiment, the inner holding member 50 is integrally formed with a heat transfer member. Thus, the inner holding member 50 can perform the function of transferring heat generated by the combustion-type heat source 70 to the flavor source 90.

[First Modification]

The following describes the inner retaining member and flow path forming member of a first modified example with reference to Figures 6 and 7. Figure 6 is a top view of the inner retaining member 50A and flow path forming member 60A of the first modified example. Figure 7 is a top view of the inner retaining member 50A and flow path forming member 60A of the first modified example, viewed from the side opposite to Figure 6. In addition, for convenience, the position of the through-opening 34 formed in the second side wall 32 is indicated by a dotted line in Figures 6 and 7.

The structure of the inner holding member 50A is the same as that shown in FIG4 and FIG5 . The flow path forming member 60A includes at least one member provided between the first side wall 51 and the second side wall 32 .

In the first modified example, the flow path forming member 60A includes a plurality of C-ring-shaped members 62. The C-ring-shaped members 62 are wound around the first side wall 51. Alternatively, the C-ring-shaped members 62 may be attached to the inner surface of the second side wall 32. The C-ring-shaped members 62 can be formed of, for example, metal or rubber.

The flow path forming component 60A is formed so that when the inner retaining component 50A is arranged in the cylindrical retaining component 30 having the second side wall 32, the length of the portion corresponding to the periphery of the fragrance source 90 in the first flow path 36 connecting the through port 34 and the inlet port 55 and passing through the first side wall 51 and the second side wall 32, that is, the fragrance source peripheral interval L1 is longer than the shortest path L2 connecting the portion where the fluid flows into the fragrance source peripheral interval L1 and the inlet port 55.

In Figures 6 and 7, a plurality of C-annular components 62 are located in the area between the through-port 34 and the inlet 55. Alternatively, one C-annular component 62 may be located in the area between the through-port 34 and the inlet 55. The C-annular component 62 has an opening portion 63 that is open at one point and extends circumferentially along the first side wall 51. The opening portion 63 is arranged to be offset circumferentially relative to at least one of the through-port 34 and the inlet 55. Thus, the C-annular component 62 forms a circumferential fragrance source peripheral interval L1 between the first side wall 51 and the second side wall 32, as shown in Figures 6 and 7. Therefore, the first flow path 36 is longer than the shortest path L2 between the through-port 34 and the inlet 55 when the flow path forming component 60A is not provided.

In the first modified example, a C-shaped ring-shaped member 62 having an opening 63 opened at one location is employed. Alternatively, the flow path-forming member 60A may include a member having openings 63 opened at two or more locations. Even in this case, the openings 63 may be offset circumferentially relative to at least one of the through-port 34 and the inlet 55. Furthermore, the size of the openings 63 is not particularly limited; depending on the circumstances, the openings 63 may extend over at least half the circumference of the first side wall 51.

The fragrance inhaler 10 may also include a first separator 68A that separates the first flow path 36 from the inhalation port 40 (or the second flow path 38). In the first modified embodiment, the first separator 68A may also be formed by an O-ring-shaped component. The first separator 68A is disposed between the first side wall 51 and the second side wall 32, closer to the non-ignition end E2 than the through-opening 34 of the second side wall 32. The O-ring-shaped component serving as the first separator 68A completely or partially prevents gas from directly flowing from the first flow path 36 into the second flow path 38. The O-ring-shaped component can be formed, for example, from metal or rubber.

The fragrance inhaler 10 may also include a second separator 69A to prevent gas leakage from the first flow path 36. The second separator 69A, together with the inner retaining member 50A and the combustion-type heat source 70, blocks the opening of the cylindrical retaining member 30 on the ignition end E1 side. In the first modified example, the second separator 69A may also be formed by an O-ring-shaped member. The second separator 69A is located between the first side wall 51 and the second side wall 32, closer to the ignition end E1 than the inlet 55 of the first side wall 51. Thus, the O-ring-shaped member serving as the second separator 69A completely or partially prevents gas leakage from the ignition end E1 side of the first flow path 36.

In the above embodiment, the separators 68A and 69A are formed of O-ring-shaped members. Alternatively, the separators 68A and 69A may be formed of members integrally formed on the first side wall 51 or the second side wall 32 .

[Second Modification]

The following describes an inner retaining member and a flow path forming member according to a second modified example with reference to FIG8 . FIG8 is a top view of an inner retaining member 50D and a flow path forming member 60 according to the second modified example. In FIG8 , for convenience, the position of the through-opening 34 formed in the second side wall 32 is indicated by a dotted line.

In the second modification, the flow path forming member 60 includes a spiral member 61, similar to the structure shown in FIG4 . The spiral member 61 is wound around the first side wall 51. Alternatively, the spiral member 61 may be attached to the inner surface of the second side wall 32.

A first separator 68A is provided to separate the first flow path 36 from the suction port 40 (or the second flow path 38). As in the first modified example, the first separator 68A can also be formed by an O-ring-shaped member. The first separator 68A is provided between the first side wall 51 and the second side wall 32, closer to the non-ignition end E2 than the through-opening 34 of the second side wall 32.

In addition, a second separator 69A may be provided to prevent gas leakage from the first flow path 36. As in the first modified example, the second separator 69A may be formed of an O-ring-shaped member. The second separator 69A is provided between the first side wall 51 and the second side wall 32, closer to the ignition end E1 than the inlet 55 of the first side wall 51.

[Third Modification]

The following describes the inner retaining member and flow path forming member of a third modified example with reference to FIG9 . FIG9 is a top view of the inner retaining member 50B and flow path forming member 60B of the third modified example. In FIG9 , for convenience, the position of the through-opening 34 formed in the second side wall 32 is indicated by a dotted line.

The inner retaining member 50B has a first side wall 51. An inlet 55 for introducing external air into the fragrance source 90 within the first side wall 51 is formed in the first side wall 51. The flow path forming member 60B is formed by a protrusion and/or groove 65 integrally formed on the first side wall 51. More specifically, the flow path forming member 60A is formed by a spiral protrusion and/or groove 65 integrally formed on the first side wall 51.

The flow path forming component 60B is formed so that when the inner retaining component 50B is arranged in the cylindrical retaining component 30 having the second side wall 32, the through port 34 and the inlet port 55 are connected and the length of the portion corresponding to the periphery of the fragrance source 90 in the first flow path 36 between the first side wall 51 and the second side wall 32, that is, the fragrance source peripheral interval L1 is longer than the shortest path L2 connecting the portion where the fluid flows into the fragrance source peripheral interval L1 and the inlet port 55.

In the third modified example, the spiral protrusion and/or groove 65 is located in the region between the through-port 34 and the inlet 55. A spiral gap (flow path) is formed between the spiral protrusion and/or groove 65 and the second side wall 32. Therefore, the length L1 of the first flow path 36 is longer than the shortest path L2 between the through-port 34 and the inlet 55 when the flow path forming member 60B is not provided.

[Fourth Modification]

The following describes the inner retaining member and flow path forming member of a fourth modified example with reference to FIG10 . FIG10 is a top view of an inner retaining member 50E and a flow path forming member 60E of the fourth modified example. In FIG10 , for convenience, the position of the through-opening 34 formed in the second side wall 32 is indicated by a dotted line.

The inner retaining member 50E is inserted into the second side wall 32 of the cylindrical retaining member 30. FIG. 10 shows a cross-sectional view of the second side wall 32. The inner retaining member 50E includes a first side wall 51 formed with spiral protrusions and/or grooves. An inlet 55 is formed in the first side wall 51 to guide external air into the fragrance source 90 within the first side wall 51. The flow path forming member 60E is formed by a groove 67 integrally formed in the second side wall 32.

Specifically, a spiral groove 67 is formed in the second side wall 32. In addition, a spiral protrusion is formed on the first side wall 51 of the inner retaining member 50E to match the position of the spiral groove 67. Except near the two ends of the first side wall 51, the front end of the spiral protrusion formed on the first side wall 51 is cut off. The first flow path 36 is formed between the front end 65B of the cut-off protrusion and the spiral groove 67 formed in the second side wall 32. The first flow path 36 extends in a spiral shape. Therefore, the length L1 of the first flow path 36 is longer than the shortest path L2 between the through-port 34 and the inlet 55 when the flow path forming member 60B is not provided.

The inner retaining member 50E is provided with a first separator 68E that separates the first flow path 36 from the suction port 40 (or the second flow path 38). The first separator 68E may also be formed by a spiral protrusion formed on the first side wall 51. The first separator 68E may also be located closer to the non-ignition end E2 than the through-port 34. The front end of the spiral protrusion serving as the first separator 68E may not be cut off, but may be closely attached to the groove of the second side wall 32.

A second separator 69E is provided on the inner retaining member 50E to prevent gas leakage from the first flow path 36. The second separator 69E, together with the inner retaining member 50E and the combustion-type heat source 70, blocks the opening on the ignition end E1 side of the cylindrical retaining member 30. The second separator 69E can also be formed by a spiral protrusion formed on the first side wall 51. The second separator 69E can also be located closer to the ignition end E1 side than the inlet 55. The tip of the spiral protrusion serving as the second separator 69E can also be left intact and tightly adhered to the groove 67 of the second side wall 32.

According to the fourth modification, by screwing the inner retaining member 50E into the cylindrical retaining member 30, the spiral first flow path 36 and the separators 68E and 69E can be simultaneously formed between the inner retaining member 50E and the cylindrical retaining member 30. In addition, since the spiral protrusions and grooves engage with each other, the inner retaining member 50E is firmly retained.

[Second embodiment]

Hereinafter, a flavor inhaler 10A according to a second embodiment will be described with reference to Fig. 11. The same reference numerals are used to denote the same components as those in the first embodiment. Hereinafter, differences from the first embodiment will be mainly described.

In the second embodiment, the through-hole 34 formed in the cylindrical retaining member 30 is located closer to the non-ignition end side E2 than the end portion of the fragrance source 90 on the non-ignition end E2 side. The first flow path 36 extends from the through-hole 34 to the ignition end E1 side. A pipe member 84 is provided inside the cylindrical retaining member 30. The pipe member 84 can also separate the first flow path 36 and the second flow path 38, and extends from the position of the through-hole 34 to the first side wall 51. The first flow path 36 passes between the first side wall 51 of the inner retaining member 50 and the second side wall 32 of the cylindrical retaining member 30, and reaches the inlet 55.

The section near the through-opening 34 may also be adjacent to the second flow path 38 via the separator 68. The first flow path 36 of the separator 68 includes a resistance member 82 that fills the gap directly connecting the first flow path 36 and the second flow path 38. The resistance member 82 does not completely fluidically isolate the first flow path 36 from the second flow path 38, but rather increases the fluid resistance of the path directly from the first flow path 36 to the second flow path 38.

The fluid resistance of the path from the first flow path 36 directly into the second flow path 38 via the resistance member 82 (see arrow F6 in FIG. 11 ) is preferably greater than the fluid resistance of the path from the first flow path 36 to the second flow path via the fragrance source 90. In other words, the separator 68 only needs to be configured so that the fluid resistance of the path connecting the first flow path 36 and the second flow path 38, which passes through the fragrance source 90, is lower than the fluid resistance of the path that does not pass through the fragrance source 90. This allows a large amount of air flowing into the first flow path 36 to be directed to the fragrance source 90.

In addition, if the separator 68 is constructed so that the fluid resistance of the path passing through the fragrance source 90 in the path connecting the first flow path 36 and the second flow path 38 is smaller than the fluid resistance of the path not passing through the fragrance source 90, it can also reach a portion of the first flow path 36 and/or the through-port 34.

As described in the second embodiment, a plurality of paths may be provided connecting the first flow path 36 and the second flow path 38. In this case, the path passing through the flavor source 90 among the paths connecting the first flow path 36 and the second flow path 38 preferably has the smallest fluid resistance.

In the second embodiment, the first flow path 36 and the second flow path 38 are not completely fluidically cut off from each other. Instead, the separator 68 preferably completely fluidically cuts off the first flow path 36 and the second flow path 38.

[Third embodiment]

Hereinafter, a flavor inhaler according to a third embodiment will be described with reference to Fig. 12. The same reference numerals are used for the same components as those in the first embodiment. Hereinafter, differences from the first embodiment will be mainly described.

In the third embodiment, the flow path forming member 60 between the first side wall 51 of the inner retaining member 50 and the second side wall 32 of the cylindrical retaining member 30 is formed by a protrusion or groove 66 integrally formed on the inner surface of the second side wall 32. The protrusion or groove 66 integrally formed on the inner surface of the second side wall 32 may also have a spiral shape, for example. Even in this case, the portion of the first flow path 36 corresponding to the outer circumference of the fragrance source 90, namely, the fragrance source peripheral section, can be made longer than the shortest path connecting the portion where the fluid flows into the fragrance source peripheral section and the inlet 55.

Furthermore, when the cylindrical holding member 30 includes a heat transfer member facing the first flow path 36 , projections or grooves serving as flow path forming members may be formed on the inner surface of the heat transfer member.

[Fourth embodiment]

Hereinafter, a flavor inhaler according to a fourth embodiment will be described with reference to Fig. 13. The same reference numerals are used for the same components as those in the first embodiment. Hereinafter, differences from the first embodiment will be mainly described.

In the fourth embodiment, the inner retaining member 50C has a different shape than the inner retaining member shown in Figures 4 and 5 . Specifically, the inner retaining member 50C does not have the bottom portion shown in Figures 4 and 5 . The first sidewall 51 of the inner retaining member 50C may also have a tapered shape that faces the non-ignition end E2 and tilts toward the center. The fragrance source 90 also faces the non-ignition end E2 and tilts toward the center. Thus, even without a bottom portion, the inner retaining member 50C can still retain the fragrance source 90.

Furthermore, the first side wall 51 of the inner holding member 50C has a tapered shape that is inclined toward the non-ignition end E2 and toward the center, thereby facilitating the insertion of the inner holding member 50C into the cylindrical holding member 30 .

Furthermore, the first side walls 51 of the inner holding members 50 , 50A, and 50D shown in FIGS. 4 to 8 may have the tapered shape described in this embodiment.

[Fifth embodiment]

Hereinafter, a flavor inhaler according to a fifth embodiment will be described with reference to Fig. 14. The same reference numerals are used for the same components as those in the first embodiment. Hereinafter, differences from the first embodiment will be mainly described.

In the fifth embodiment, an inlet 55 for allowing fluid to flow from the first flow path into the fragrance source 90 is formed through an opening on one end side of the first side wall 51 of the inner retaining member. More specifically, the fluid in the first flow path flows from the gap between the inner retaining member and the combustion-type heat source 70 into the space inside the first side wall 51 where the fragrance source 90 is located. In this way, the "inlet 55" is not only a hole formed in the cylindrical first side wall 51, but also includes the concept of an opening at the end of the cylindrical first side wall 51. In this case, it is not necessary to form a hole in the first side wall 51.

In the fifth embodiment, the inner holding member holds the flavor source 90 but does not hold the combustion type heat source 70. In this way, the inner holding member may not hold the combustion type heat source 70. In this case, there is no need to form a claw portion that engages with the combustion type heat source 70 on the first side wall.

[Other embodiments]

The present invention has been described with reference to the above embodiments, but the description and drawings forming part of this disclosure should not be construed as limiting the present invention. Based on this disclosure, various alternative embodiments, examples, and operational techniques will become apparent to those skilled in the art.

The features described in the above-mentioned embodiments and modifications can be combined as much as possible. For example, various combinations of the above-mentioned flow path forming members 60, 60A, 60B or separators 68, 68A, 69, 69A can be adopted.

Industrial applicability

According to the embodiment, it is possible to provide a flavor inhaler and an inner holding member that can suppress the outflow of flavor from the flavor source through the first flow path and out of the through-port.

Claims (21)

1. A fragrance extractor, comprising: A cylindrical retaining component that extends from the ignition end to the non-ignition end; A combustion-type heat source is located at the ignition end; The aroma source is located on the non-ignition end side relative to the combustion-type heat source; An inner retaining member is disposed within the cylindrical retaining member and retains at least the fragrance source; An inlet, located on the inner retaining member, introduces air into the fragrance source. The inner retaining member has a cylindrical first sidewall surrounding at least a portion of the fragrance source. The cylindrical retaining member has a cylindrical second sidewall that surrounds the first sidewall. The second sidewall has a through-hole that fluidly communicates with the external air. The system comprises: a first flow path connecting the through-port and the inlet, and extending between the first sidewall and the second sidewall; and a second flow path connecting the extraction port for absorbing the fragrance generated in the fragrance source to the fragrance source. Furthermore, a flow path forming component is provided, which is formed such that the length of the portion of the first flow path corresponding to the outer periphery of the fragrance source, i.e., the fragrance source outer periphery interval, is longer than the shortest path connecting the part that allows external air to flow into the fragrance source outer periphery interval and the inlet. 2. The fragrance extractor as described in claim 1, wherein, The fluid resistance of the path that connects the first flow path and the second flow path through the fragrance source is less than the fluid resistance of the path that does not pass through the fragrance source. 3. The fragrance extractor as described in claim 1, wherein, The opening on the ignition end side of the cylindrical retaining member is blocked. 4. The fragrance extractor as described in claim 1, wherein, The through-hole is located at the end of the fragrance source that is closer to the ignition end than the non-ignition end. 5. The fragrance extractor as claimed in claim 1, wherein, The inlet is located closer to the ignition end than the through-hole. The first flow path is located only at the end of the fragrance source that is closer to the ignition end than the non-ignition end side. 6. The fragrance extractor as claimed in claim 1, wherein, The second flow path has cavities that diffuse the aroma. 7. The fragrance extractor as claimed in claim 1, wherein, The flow path forming component has at least one component disposed between the first sidewall and the second sidewall. 8. The fragrance extractor as claimed in claim 1, wherein, The flow path forming component includes a spiral-shaped component. 9. The fragrance extractor as claimed in claim 1, wherein, The flow path forming component includes a spiral component wound around the first sidewall. 10. The fragrance extractor as claimed in claim 1, wherein, The flow path forming component includes a component having an opening at at least one location and extending circumferentially along the first sidewall. The at least one open portion is offset circumferentially relative to at least one of the through-hole and the inlet. 11. The fragrance extractor as claimed in claim 1, wherein, The flow path forming component has a protrusion or groove integrally formed on the outer surface of the first sidewall or the inner surface of the second sidewall. 12. The fragrance extractor as claimed in claim 11, wherein, The protrusions or grooves are formed in a spiral shape. 13. The fragrance extractor as claimed in claim 1, wherein, A separator is provided to separate the first flow path and the suction port. 14. The fragrance extractor as claimed in claim 13, wherein, The separator extends circumferentially along the first sidewall between the first sidewall and the second sidewall. 15. The fragrance extractor as claimed in claim 1, wherein, The inner retaining member is configured to retain the combustion-type heat source and the aroma source. The inner retaining member has a claw that protrudes into the inner side of the first sidewall and engages with the combustion-type heat source. The inlet is formed on the non-ignition end side of the first sidewall relative to the contact point between the claw and the combustion-type heat source. 16. The fragrance extractor as claimed in claim 15, wherein, The inlet is adjacent to the non-ignition end side of the contact point between the claw and the combustion-type heat source. 17. The fragrance extractor as claimed in claim 1, wherein, The first sidewall has a conical shape extending from the ignition end side to the non-ignition end side into the inner side of the first sidewall. 18. The fragrance extractor as claimed in claim 1, wherein, The inner retaining member has a bottom end face that supports the non-ignition end side of the fragrance source. A vent hole is formed on the non-ignition end side of the inner retaining component. The inlet is located around the fragrance source or closer to the ignition end than the fragrance source. 19. The fragrance extractor as claimed in claim 1, wherein, The second sidewall has a heat transfer component that covers at least a portion of the first sidewall and extends toward the non-ignition end side beyond the first sidewall. 20. The fragrance extractor as claimed in claim 1, wherein, The inner retaining component is integrally formed from the heat transfer component. 21. An inner retaining member suitable for a fragrance extractor having a combustion-type heat source and a fragrance source, and for retaining at least the fragrance source, wherein it comprises: A cylindrical first sidewall surrounds at least a portion of the fragrance source. An inlet that introduces air into the interior of the first sidewall; The flow path forming component is formed such that, when the inner retaining component is disposed within a cylindrical retaining component having a second sidewall having a through-hole that fluidly communicates with external air, the length of the portion of the first flow path connecting the through-hole and the inlet, corresponding to the outer periphery of the fragrance source (i.e., the fragrance source outer periphery interval), is longer than the shortest path connecting the portion into the fragrance source outer periphery interval and the inlet.