Heating assembly and aroma attractor equipped with the same

Abstract

To provide a cartridge for sucker having a new structure, and a sucker.SOLUTION: A heating assembly includes a first cylindrical member which has at one end a first opening into which a flavor generating article is insertible and there is a second opening forming an air inlet at the other end, a heating member, and a heat insulation material. The heating assembly is further provided with a second cylindrical member arranged by encircling the first cylindrical member. A sealed region is provided between the first cylindrical member and the second cylindrical member, and the heating member and the heat insulation material are stored in the sealed region.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a heating assembly and an aroma attractor including the same.

Background Art

[0002] Conventionally, an aroma attractor for attracting aromas and the like without burning materials is known. As such an aroma attractor, for example, a smoking material heating device that forms an aerosol by heating a smoking material made of tobacco containing a volatile component is known (see Patent Document 1). The smoking material heating device described in Patent Document 1 has a hollow cylindrical heater.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a heating assembly and an aroma attractor having a new structure.

Means for Solving the Problems

[0005] According to one aspect of the present invention, there is provided a heating assembly including: a first cylindrical member having a first opening at one end into which an aroma-generating article can be inserted and a second opening at the other end forming an air inlet; a heating member; and a heat insulating material. The heating assembly further includes a second cylindrical member disposed so as to surround the first cylindrical member, a sealed region is provided between the first cylindrical member and the second cylindrical member, and the heating member and the heat insulating material are accommodated in the sealed region.

[0006] According to another aspect of the present invention, there is provided an aroma attractor including the above heating assembly.

Brief Description of the Drawings

[0007]

Figure 1A

Figure 1B

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings described below, the same or corresponding components are denoted by the same reference numerals, and redundant descriptions are omitted.

[0009] FIG. 1A is an overall perspective view of the flavor attractor according to the present embodiment. FIG. 1B is an overall perspective view of the flavor attractor according to the present embodiment while holding a smoking article. The flavor attractor 10 according to the present embodiment is configured to generate an aerosol containing a flavor by heating, for example, a smoking article 110 (corresponding to an example of a flavor-generating article) having a flavor source (corresponding to an example of a flavor-generating base material) including an aerosol source.

[0010] As shown in FIGS. 1A and 1B, the flavor attractor 10 includes a top housing 11A, a bottom housing 11B, a cover 12, a switch 13, and a lid 14. The top housing 11A and the bottom housing 11B are connected to each other to form the outermost housing 11 of the flavor attractor 10. The housing 11 is sized to fit in the user's hand. When the user uses the flavor attractor 10, the user can hold the flavor attractor 10 by hand and attract the flavor.

[0011] The top housing 11A has an opening (not shown), and the cover 12 is coupled to the top housing 11A so as to close the opening. As shown in FIG. 1B, the cover 12 has an opening 12a into which a smoking article 110 can be inserted. The lid 14 is configured to open and close the opening 12a of the cover 12. Specifically, the lid 14 is attached to the cover 12 and is configured to be movable along the surface of the cover 12 between a first position where the opening 12a is closed and a second position where the opening 12a is open. Thereby, the lid 14 can permit or restrict access of the smoking article 110 to the interior of the flavor attractor 10 (the opening of the outer fin 17 or the opening of the top cap 48 described later).

[0012] The switch 13 is used to switch on and off the operation of the flavor attractor 10. For example, as shown in FIG. 1B, when the user operates the switch 13 with the smoking article 110 inserted into the opening 12a, power is supplied from a power source (not shown) to a heating member (not shown), and the smoking article 110 can be heated without being burned. When the smoking article 110 is heated, aerosol evaporates from the aerosol source contained in the smoking article 110, and the flavor of the flavor source is taken into the aerosol. The user can attract the aerosol containing the flavor by attracting the portion of the smoking article 110 that protrudes from the flavor attractor 10 (the portion shown in FIG. 1B). In this specification, the longitudinal direction of the flavor attractor 10 refers to the direction in which the smoking article 110 is inserted into the opening 12a.

[0013] Next, the configuration of the smoking article 110 used in the flavor attractor 10 according to the present embodiment will be described. FIG. 2 is a cross-sectional view of the smoking article 110. In the embodiment shown in FIG. 2, the smoking article 110 includes a base material portion 110A including a filler 111 (corresponding to an example of a flavor generating base material) and a first rolling paper 112 that wraps the filler 111, and a suction port portion 110B that forms an end portion opposite to the base material portion 110A. The base material portion 110A and the suction port portion 110B are connected by a second rolling paper 113 different from the first rolling paper 112. However, the second rolling paper 113 may be omitted, and the base material portion 110A and the suction port portion 110B may be connected using the first rolling paper 112.

[0014] The suction port portion 110B in FIG. 2 has a paper tube portion 114, a filter portion 115, and a hollow segment portion 116 disposed between the paper tube portion 114 and the filter portion 115. The hollow segment portion 116 is composed of, for example, a filling layer having one or a plurality of hollow channels and a plug wrapper that covers the filling layer. Since the filling density of the fiber in the filling layer is high, during suction, air and aerosol only flow through the hollow channels, and almost no flow occurs inside the filling layer. In the smoking article 110, when it is desired to reduce the reduction of the aerosol component in the filter portion 115, shortening the length of the filter portion 115 and replacing it with the hollow segment portion 116 is effective for increasing the delivery amount of the aerosol.

[0015] The suction port portion 110B in FIG. 2 is composed of three segments. However, in the present embodiment, the suction port portion 110B may be composed of one or two segments, or may be composed of four or more segments. For example, the hollow segment portion 116 may be omitted and the paper tube portion 114 and the filter portion 115 may be arranged adjacent to each other to form the suction port portion 110B.

[0016] In the embodiment shown in FIG. 2, the longitudinal length of the smoking article 110 is preferably 40 mm or more and 90 mm or less, more preferably 50 mm or more and 75 mm or less, and even more preferably 50 mm or more and 60 mm or less. The circumference of the smoking article 110 is preferably 15 mm or more and 25 mm or less, more preferably 17 mm or more and 24 mm or less, and even more preferably 20 mm or more and 23 mm or less. Further, the length of the base material portion 110A in the smoking article 110 may be 20 mm, the length of the first rolling paper 112 may be 20 mm, the length of the hollow segment portion 116 may be 8 mm, and the length of the filter portion 115 may be 7 mm. However, the lengths of these individual segments can be appropriately changed according to manufacturing suitability, required quality, etc.

[0017] In the present embodiment, the filler 111 of the smoking article 110 may contain an aerosol source that is heated at a predetermined temperature to generate an aerosol. The type of the aerosol source is not particularly limited, and extract substances from various natural products and / or their constituent components can be selected according to the use. Examples of the aerosol source include glycerin, propylene glycol, triacetin, 1,3 - butanediol, and mixtures thereof. The content of the aerosol source in the filler 111 is not particularly limited, and is usually 5% by weight or more, preferably 10% by weight or more, and usually 50% by weight or less, preferably 20% by weight or less, from the viewpoints of sufficiently generating an aerosol and imparting a good flavor.

[0018] The filling 111 of the smoking article 110 in this embodiment may contain tobacco flakes as a flavor source. The material of the tobacco flakes is not particularly limited, and known materials such as laminas and midribs can be used. The content range of the filling 111 in the smoking article 110, when the circumference is 22 mm and the length is 20 mm, is, for example, 200 mg or more and 400 mg or less, and preferably 250 mg or more and 320 mg or less. The water content of the filling 111 is, for example, 8% by weight or more and 18% by weight or less, and preferably 10% by weight or more and 16% by weight or less. With such a water content, the occurrence of bleeding is suppressed, and the winding-up suitability during the manufacture of the base material portion 110A is improved. There are no particular restrictions on the size of the tobacco flakes used as the filling 111 and its preparation method. For example, dried tobacco leaves cut to a width of 0.8 mm or more and 1.2 mm or less may be used. Also, dried tobacco leaves may be pulverized and homogenized so that the average particle size is about 20 μm or more and 200 μm or less, sheet-processed, and then cut to a width of 0.8 mm or more and 1.2 mm or less. Further, the sheet-processed material may be gathered without cutting and used as the filling 111. Also, the filling 111 may contain one or more kinds of fragrances. The type of the fragrance is not particularly limited, but from the viewpoint of imparting a good taste, it is preferably menthol.

[0019] In this embodiment, the first wrapper 112 and the second wrapper 113 of the smoking article 110 can be made from a base paper having a basis weight of, for example, 20 gsm or more and 65 gsm or less, and preferably 25 gsm or more and 45 gsm or less. The thickness of the first wrapper 112 and the second wrapper 113 is not particularly limited, but from the viewpoints of rigidity, air permeability, and ease of adjustment during papermaking, it is 10 μm or more and 100 μm or less, preferably 20 μm or more and 75 μm or less, and more preferably 30 μm or more and 50 μm or less.

[0020] In the present embodiment, the first wrapper 112 and the second wrapper 113 of the smoking article 110 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 first wrapper 112 and the second wrapper 113. In the present embodiment, with respect to the preferred basis weight range (25 gsm or more and 45 gsm or less), it is preferable that the filler is 15% by weight or more and 45% by weight or less. As the filler, for example, calcium carbonate, titanium dioxide, kaolin, etc. can be used Thereby. The paper containing such a filler exhibits a bright white color, which is preferable from the viewpoint of appearance for use as the wrapper of the smoking article 110, and can maintain whiteness permanently. By containing a large amount of such a filler, for example, the ISO whiteness of the wrapper can be made 83% or more. Further, from the practical viewpoint of using it as the wrapper of the smoking article 110, the first wrapper 112 and the second wrapper 113 preferably have a tensile strength of 8 N / 15 mm or more. This tensile strength can be increased by reducing the content of the filler. Specifically, it can be increased by reducing the content of the filler below the upper limit of the content of the filler shown in the range of each basis weight exemplified above.

[0021] Next, the internal structure of the flavor attractor 10 shown in FIGS. 1A and 1B will be described. FIG. 3 is a cross-sectional view taken along the arrow 3-3 shown in FIG. 1A. As shown in FIG. 3, the flavor attractor 10 has a power supply unit 20, a circuit unit 30, and a heating unit 40 in the internal space of the housing 11. The circuit unit 30 has a first circuit board 31 and a second circuit board 32 electrically connected to the first circuit board 31. The first circuit board 31 extends in the longitudinal direction as shown in the drawing, for example. Thereby, the power supply unit 20 and the heating unit 40 are partitioned by the first circuit board 31. As a result, the heat generated in the heating unit 40 is suppressed from being transmitted to the power supply unit 20.

[0022] The second circuit board 32 is disposed between the power supply unit 20 and the switch 13 and extends in a direction orthogonal to the extending direction of the first circuit board 31. The switch 13 is disposed adjacent to the second circuit board 32. When the user presses the switch 13, a part of the switch 13 may come into contact with the second circuit board 32.

[0023] The first circuit board 31 and the second circuit board 32 include, for example, a microprocessor or the like and can control the supply of power from the power supply unit 20 to the heating unit 40. Thereby, the first circuit board 31 and the second circuit board 32 can control the heating of the smoking article 110 by the heating unit 40.

[0024] The power supply unit 20 has a power supply 21 that is electrically connected to the first circuit board 31 and the second circuit board 32. The power supply 21 can be, for example, a rechargeable battery or a non-rechargeable battery. The power supply 21 is electrically connected to the heating unit 40 via at least one of the first circuit board 31 and the second circuit board 32. Thereby, the power supply 21 can supply power to the heating unit 40 so as to appropriately heat the smoking article 110. Also, as shown in the figure, the power supply 21 is disposed adjacent to the heating assembly 41 in a direction orthogonal to the longitudinal direction of the heating unit 40. Thereby, even if the size of the power supply 21 is increased, it is possible to suppress an increase in the longitudinal length of the flavor attractor 10.

[0025] The flavor attractor 10 also has a terminal 22 that can be connected to an external power supply. The terminal 22 can be connected to a cable such as a micro USB. When the power supply 21 is a rechargeable battery, by connecting an external power supply to the terminal 22, a current can be passed from the external power supply to the power supply 21 to charge the power supply 21. Also, by connecting a data communication cable such as a micro USB to the terminal 22, data related to the operation of the flavor attractor 10 or the like may be transmitted to an external device.

[0026] As shown in the figure, the heating unit 40 has a heating assembly 41 extending in the longitudinal direction. The heating assembly 41 is composed of a plurality of cylindrical members and forms a cylindrical body as a whole. The heating assembly 41 is configured to be able to accommodate a part of the smoking article 110 therein, and has a function of defining a flow path of air supplied to the smoking article 110 and a function of heating the smoking article 110 from the outer periphery.

[0027] In the bottom housing 11B, a vent hole 15 (corresponding to an example of an air inlet) for allowing air to flow into the inside of the heating assembly 41 is formed. Specifically, the vent hole 15 is in fluid communication with one end of the heating assembly 41 (the left end in FIG. 3). Further, the flavor absorber 10 has a detachable cap 16 for the vent hole 15. The cap 16 is configured such that air can flow from the vent hole 15 into the inside of the heating assembly 41 even when the cap 16 is attached to the vent hole 15, and may have, for example, a through hole or a notch (not shown). By attaching the cap 16 to the vent hole 15, it is possible to suppress substances generated from the smoking article 110 inserted into the heating assembly 41 from falling outside the housing 11 through the vent hole 15.

[0028] The other end (the right end in FIG. 3) of the heating assembly 41 is in fluid communication with the opening 12a (corresponding to an example of an air outlet) shown in FIG. 1B. A substantially cylindrical outer fin 17 is provided between the cover 12 having the opening 12a and the other end of the heating assembly 41. The outer fin 17 engages with the downstream end of a top cap 48 described later. When the smoking article 110 is inserted into the interior of the flavor attractor 10 from the opening 12a of the cover 12 as shown in FIG. 1B, it passes through the outer fin 17, and at least the filling 111 (see FIG. 2) of the smoking article 110 is disposed inside the heating assembly 41. That is, the outer fin 17 forms part of an opening for accommodating the smoking article 110. The outer fin 17 is preferably formed such that the opening on the cover 12 side (the right side in FIG. 3) is larger than the opening on the heating assembly 41 side (the left side in FIG. 3). This makes it easier to insert the smoking article 110 from the opening 12a into the interior of the outer fin 17. Further, when the smoking article 110 is not inserted into the heating assembly 41, the user can clean the interior of the heating assembly 41 by inserting an instrument such as a brush from the opening 12a. The cleaning instrument can also be inserted from one end (the left end in FIG. 3) of the heating assembly 41. In that case, the cap 16 is removed from the air vent 15 of the flavor attractor 10.

[0029] As shown in FIG. 1B, with the smoking article 110 inserted into the flavor attractor 10 from the opening 12a, when the user sucks on the portion of the smoking article 110 that protrudes from the flavor attractor 10, i.e., the filter portion 115 shown in FIG. 2, air flows into the interior of the heating assembly 41 from the air vent 15. The inflowing air passes through the interior of the heating assembly 41 and reaches the user's mouth together with the aerosol generated from the smoking article 110. Therefore, the side closer to the air vent 15 of the heating assembly 41 is the upstream side, and the side closer to the opening 12a of the heating assembly 41 (the side closer to the outer fin 17) is the downstream side.

[0030] Next, the configuration of the heating assembly 41 shown in FIG. 3 will be described in detail. FIG. 4 shows a cross-sectional view of the heating assembly 41. Further, FIG. 5 shows a side view of the heating assembly 41. The heating assembly 41 includes an inner tube 42 (corresponding to an example of a first cylindrical member), a heating member 43, an aerogel 44 (corresponding to an example of a heat insulating material), and an outer tube 45 (corresponding to an example of a second cylindrical member). The inner tube 42 has a first opening 42a at one end into which the smoking article 110 can be inserted, and a second opening 42b at the other end that forms an air inlet. In the present embodiment, the inner tube 42 has a cylindrical shape and is configured to contact at least a part of the smoking article 110 inserted through the first opening 42a. The second opening 42b is located on the upstream side of the air flow, and the first opening 42a is located on the downstream side.

[0031] The outer tube 45 is arranged to surround the inner tube 42, and a predetermined gap is formed between the inner tube 42 and the outer tube 45. The heating member 43 can be a flexible film heater configured by sandwiching a heating resistor between, for example, two films such as PI (polyimide). The heating member 43 is arranged to abut against the inner tube 42. Specifically, in the illustrated example, the heating member 43 is arranged on the outer peripheral side of the inner tube 42, and the inner surface of the heating member 43 contacts the outer surface of the inner tube 42. Since the heating member 43 is arranged along the outer peripheral surface of the inner tube 42, it is deformed into a substantially cylindrical shape as a whole. deformed.

[0032] The heating assembly 41 further has a first annular member 46 extending in the circumferential direction between the downstream end of the inner tube 42 (the end on the side of the first opening 42a) and the downstream end of the outer tube 45 (the end close to the first opening 42a of the inner tube 42). The heating assembly 41 also has a second annular member 47 extending in the circumferential direction between the upstream end of the inner tube 42 (the end on the side of the second opening 42b) and the upstream end of the outer tube 45 (the end close to the second opening 42b of the inner tube 42). The first annular member 46 is closely connected to the downstream end of the inner tube 42 via a top cap 48 and a heat shrinkable tube 52, which will be described later. The second annular member 47 is closely connected to the upstream end of the inner tube 42 via a bottom cap 50 and a heat shrinkable tube 52, which will be described later. The first annular member 46 and the second annular member are closely connected to the outer tube 45. Thereby, a sealed region 54 is provided between the inner tube 42 and the outer tube 45. The sealed region 54 houses a heating member 43 and an aerogel 44.

[0033] A heat shrinkable tube 52 is disposed between the heating member 43 and the aerogel 44. The heat shrinkable tube 52 is tubular and maintains the state where the heating member 43 is in contact with the inner tube 42. Specifically, the heat shrinkable tube 52 is heat-shrunk by applying heat while being disposed on the outer peripheral side of the heating member 43, thereby applying stress to the heating member 43 so as to press the heating member 43 against the inner tube 42. The heat shrinkable tube 52 can be formed of a thermoplastic resin such as perfluoroalkoxy fluororesin (PFA), for example. In the present embodiment, the heat shrinkable tube 52 is employed for the purpose of maintaining the state where the heating member 43 is in contact with the inner tube 42, but the present invention is not limited thereto, and any member that can achieve the same purpose can be employed. For example, instead of the heat shrinkable tube 52, an elastic tube or the like can be employed.

[0034] The inner tube 42 is preferably formed of a metal material such as SUS with high thermal conductivity. Thereby, the heat of the heating member 43 is easily conducted to the entire inner tube 42, and as a result, the inner tube 42 itself can exhibit the function of the heating means. The outer tube 45 can be formed of, for example, the same metal material as the inner tube 42. Since the aerogel 44 is disposed between the heating member 43 and the outer tube 45, the heat generated from the heating member 43 is less likely to be transmitted to the outer tube 45. In the present embodiment, the aerogel 44 is employed to insulate the heat generated from the heating member 43, and this can be formed of various aerogel materials such as silica aerogel, carbon aerogel, and alumina aerogel. However, other heat insulating materials may be used instead of the aerogel, for example, fibrous heat insulating materials such as glass wool and rock wool, foamed heat insulating materials such as urethane foam and phenol foam, etc. may be used. Alternatively, the sealed region 54 may be evacuated to form a vacuum heat insulating space. When the aerogel 44 is used as the heat insulating material, the ratio of the volume of the aerogel 44 to the volume of the sealed region 54 is preferably 85% or more and 100% or less. Thereby, it is possible to suppress the mixing of air bubbles into the sealed space 54, and thus prevent the heat of the heating member 43, the inner tube 42, etc. from being transmitted to the outer tube 45 through the air bubbles. If air bubbles are mixed into the sealed space 54, the air bubbles can move freely according to the posture of the heating assembly 41 and transfer heat.

[0035] The heating assembly 41 further has a top cap 48 and a bottom cap 50. The top cap 48 and the bottom cap 50 can be formed of, for example, a resin material. The top cap 48 is a cylindrical member having an internal space communicating with the first opening 42a of the inner tube 42, and is configured to be able to insert the smoking article 110. Also, as shown in FIGS. 4 and 5, the top cap 48 is connected to the downstream end of the inner tube 42 (the end on the side of the first opening 42a). One or more convex portions 48a equally spaced in the circumferential direction are provided on the inner peripheral surface of the top cap 48. In the present embodiment, four convex portions 48a are provided on the inner peripheral surface of the top cap 48. Thereby, by applying frictional resistance to the smoking article 110 inserted into the top cap 48, it is locked, and the smoking article 110 is prevented from accidentally coming out of the flavor attractor 10.

[0036] The bottom cap 50 is an elongated cylindrical member having a downstream end 50a connected to the upstream end of the inner tube 42 (the end on the side of the second opening 42b) and an upstream end 50b on the opposite side of the downstream end 50a. The bottom cap 50 forms an internal flow path for introducing air toward the second opening 42b of the inner tube 42. Also, the upstream end 50b of the bottom cap 50 (the lower end in the figure) is arranged close to or adjacent to the vent 15 shown in FIG. 3. The air from this vent 15 flows from the upstream end 50b to the downstream end 50a of the bottom cap 50, passes through the inner tube 42 and the top cap 48, and can reach the user's mouth. That is, the bottom cap 50, the inner tube 42, and the top cap 48 form an air flow path 70 that air-communicates the vent 15 and the opening 12a of the cover 12.

[0037] Next, the details of the connection portion between the heating assembly 41 and the outer fin 17 will be described. FIG. 6 is an enlarged cross-sectional view of the connection portion between the heating assembly 41 and the outer fin 17. As shown in FIG. 6, a hollow rubber material 24 is provided at the connection portion between the outer fin 17 and the top cap 48. Specifically, the upstream end of the outer fin 17 (the end on the side of the first opening 42a) surrounds at least a part of the outer periphery of the top cap 48, specifically, the outer periphery of the downstream end of the top cap 48. That is, the upstream end of the outer fin 17 has an inner diameter larger than the outer diameter of the downstream end of the inner tube 42 that can accommodate the downstream end of the top cap 48. The outer fin 17 has a housing portion 17a for housing the rubber material 24. Specifically, the housing portion 17a of the outer fin 17 forms a predetermined gap with the outer surface of the top cap 48. The rubber material 24 is annular and extends in the circumferential direction between the outer peripheral surface of the top cap 48 and the inner peripheral surface of the outer fin 17. Thereby, the gap between the top cap 48 and the outer fin 17 is sealed. The rubber material 24 may not be limited to a hollow structure and may be a solid structure.

[0038] Next, the relative positional relationship among the inner tube 42, the heating member 43, the aerogel 44, the outer tube 45, the top cap 48, the bottom cap 50, and the heat shrinkable tube 52 will be described. FIG. 7 is a schematic enlarged cross-sectional view of the heating assembly 41. In FIG. 7, it is for explaining the relative positional relationship of the components of the heating assembly 41, and the specific shape and dimensions thereof may be different from the actual ones. Note that in FIG. 7, the upstream side (the lower side in the figure) of the bottom cap 50 is not shown.

[0039] As shown in the figure, the upstream end of the top cap 48 (the end closer to the first opening 42a) surrounds the outer periphery of the downstream end of the inner tube 42 (the end on the side of the first opening 42a). That is, the upstream end of the top cap 48 has an inner diameter larger than the outer diameter of the downstream end of the inner tube 42, which can accommodate the downstream end of the inner tube 42. The connection portion between the inner surface of the top cap 48 and the outer surface of the inner tube 42 is sealed, for example, by an adhesive or the like, so that gas or aerosol does not pass through the gap between the top cap 48 and the inner tube 42. Further, the downstream end of the heat shrinkable tube 52 (the end on the side of the first opening 42a) surrounds the outer periphery of the upstream end of the top cap 48. The heat shrinkable tube 52 is in close contact with the upstream end of the top cap 48. Thus, the heating assembly 41 has an axially overlapping region between the top cap 48 and the inner tube 42, and between the top cap 48 and the heat shrinkable tube 52. Also, these overlapping regions are in close contact with or sealed from each other. Thereby, the sealing performance between the top cap 48, the inner tube 42, and the heat shrinkable tube 52 can be improved.

[0040] Also, the downstream end 50a of the bottom cap 50 (the end closer to the second opening 42b) surrounds the outer periphery of the upstream end of the inner tube 42 (the end on the side of the second opening 42b). That is, the downstream end 50a of the bottom cap 50 has an inner diameter larger than the outer diameter of the upstream end of the inner tube 42, which can accommodate the upstream end of the inner tube 42. The connection portion between the inner surface of the bottom cap 50 and the outer surface of the inner tube 42 is adhered, for example, by an adhesive or the like, so that gas or aerosol does not pass through the gap between the bottom cap 50 and the inner tube 42. Further, the upstream end of the heat shrinkable tube 52 (the end on the side of the second opening 42b) surrounds the outer periphery of the downstream end 50a of the bottom cap 50. The heat shrinkable tube 52 is in close contact with the downstream end 50a of the bottom cap 50. Thus, the heating assembly 41 has an axially overlapping region between the bottom cap 50 and the inner tube 42, and between the bottom cap 50 and the heat shrinkable tube 52. Also, these overlapping regions are in close contact with or sealed from each other. Thereby, the sealing performance between the bottom cap 50, the inner tube 42, and the heat shrinkable tube 52 can be improved.

[0041] As shown in the figure, the top cap 48, the inner tube 42, and the bottom cap 50 are arranged axially in line, and adjacent ones are hermetically connected to each other to form a tubular assembly with a sealed structure. In this tubular assembly, the joints between the top cap 48 and the inner tube cap, and between the inner tube 42 and the bottom cap 50 can both have a sealed structure that can withstand a negative pressure of 40 kPa or more and 60 kPa or less based on atmospheric pressure. In particular, each joint preferably has a sealed structure that can withstand a negative pressure of 45 kPa or more and 55 kPa or less, and typically preferably has a sealed structure that can withstand a negative pressure of 50 kPa.

[0042] Whether each joint has a desired sealed structure can be tested, for example, by the method shown below. First, with one opening of the top cap 48 and the bottom cap 50 blocked, a negative pressure is formed inside the tubular assembly by suction from the other opening using a vacuum pump or the like. When the negative pressure inside the tubular assembly reaches a desired value (for example, 50 kPa), the suction is stopped, and the pressure change inside the tubular assembly when left in that state for a certain period of time is measured. When the pressure change at this time is smaller than a predetermined threshold value, it is determined that each joint has the desired sealing performance. The standing time after the suction stop described above is, for example, 3 seconds, and the threshold value of the pressure change is 2.3 kPa.

[0043] The bottom cap 50 has a small-diameter portion 50c having an inner diameter smaller than the inner diameter of the inner tube 42. A stepped locking portion 50d is formed by the portion of the bottom cap 50 surrounding the outer periphery of the upstream end of the inner tube 42 and the small-diameter portion 50c. In other words, the locking portion 50d is a surface substantially orthogonal to the axial direction of the inner tube 42. As shown in the figure, the upstream end of the inner tube 42 is arranged to abut against the locking portion 50d. Also, when the smoking article 110 is inserted from the first opening 42a, the size of the diameter of the small-diameter portion 50c is designed so that the tip of the smoking article 110 abuts against the locking portion 50d. Thereby, the positioning of the smoking article 110 can be performed.

[0044] As shown in the figure, the downstream end (the end on the side of the first opening 42a) and the upstream end (the end on the side of the second opening 42b) of the inner tube 42 are configured to protrude outside the outer tube 45. Also, as shown in the figure, the heating member 43 is arranged so as to fit between the upstream end and the downstream end of the outer tube 45 in the axial direction. In other words, the heating member 43 is configured not to contact the upstream end of the inner tube 42 that protrudes outside the outer tube 45. As a result, the temperature of the upstream end of the inner tube 42 becomes lower than the temperature at the axial center of the inner tube 42. Consequently, when the smoking article 110 is inserted from the first opening 42a and the smoking article 110 abuts against the locking portion 50d, heating of the tip of the smoking article 110 can be suppressed, so that unintentional aerosol generation from the tip of the smoking article can be prevented. Further, since the tip of the smoking article 110 is relatively low in temperature, condensation and collection of aerosol there are promoted, so that it is possible to prevent the aerosol generated on the downstream side from flowing back through the air flow path 70.

[0045] The length of the heat shrinkable tube 52 in the axial direction is substantially the same as the length of the inner tube 42 in the axial direction. Also, the heat shrinkable tube 52 is longer than the heating member 43 in the axial direction, and the heating member 43 is positioned between the upstream end and the downstream end of the heat shrinkable tube 52. Thereby, the heat shrinkable tube 52 can cover the entire heating member 43, and the heating member 43 can be brought into uniform contact with the inner tube 42. The aerogel 44 extends in the axial direction at least between the upstream end and the downstream end of the heating member 4 3. Thereby, heat generated from the heating member 43 can be efficiently blocked.

[0046] The upstream end (the end close to the first opening 42a) of the top cap 48 is located upstream (lower side in the figure) of the downstream end (the end close to the first opening 42a) of the outer tube 45. The downstream end 50a of the bottom cap 50 is located outside the outer tube 45. Also, the upstream end (the end on the side close to the second opening 42b) of the heat shrinkable tube 52 protrudes outside the outer tube 45 and surrounds the outer periphery of the bottom cap 50 as described above.

[0047] Since the first annular member 46 and the second annular member 47 are in substantial contact with the inner tube 42 and the outer tube 45, if they are formed of a material with high thermal conductivity, much of the heat of the inner tube 42 can be transferred to the outer tube 45 through the first annular member 46 and the second annular member 47. Therefore, in the present embodiment, the first annular member 46 and the second annular member 47 can be formed of a material with lower thermal conductivity than the inner tube 42 and the outer tube 45. Specifically, for example, they can be formed of a resin such as a UV curable resin or an ultraviolet curable resin. Thereby, heat transfer from the inner tube 42 to the outer tube 45 can be suppressed.

[0048] The heating assembly 41 has a heater tail portion 56 that electrically connects the heating member 43 to the circuit portion 30 (corresponding to an example of a control portion) shown in FIG. 3. As shown in FIG. 7, at least a part of the heater tail portion 56 extends along the outer surface of the inner tube 42 and the outer surface of the bottom cap 50 and protrudes outside the sealed region 54.

[0049] The inner diameter of the bottom cap 50 can be constant from the downstream end 50a to the upstream end 50b. Further, the inner surface of the bottom cap 50 may be formed in a tapered shape, whereby the inner diameter of the bottom cap 50 may increase from the downstream end 50a toward the upstream end 50b. When the maximum inner diameter of the bottom cap 50 is Dmax and the inner diameter of the inner tube 42 is Dc, the ratio of Dc to Dmax (Dc / Dmax) is, for example, 1.4 or more and 2.34 or less, preferably 1.56 or more and 2.01 or less, and typically 1.75. Therefore, when the inner diameter Dc of the inner tube 42 is 7.00 mm, the maximum diameter Dmax of the bottom cap 50 is, for example, 2.99 mm or more and 4.99 mm or less, preferably 3.49 mm or more and 4.49 mm or less, and typically 3.99 mm. When the diameter of the smoking article 110 is close to the inner diameter of the inner tube 42, if the maximum diameter of the bottom cap 50 and the maximum inner diameter of the inner tube 42 are within the above range, a sufficient air flow path 70 can be ensured while securely holding the tip of the smoking article 110 by the locking portion 50d of the bottom cap 50. Here, the diameter of the bottom cap 50 includes the inner diameter of the small diameter portion 50c, excluding the inner diameter of the portion surrounding the inner tube 42.

[0050] Next, the positional relationship between the smoking article 110 and the heating assembly 41 when the smoking article 110 is inserted into the flavor attractor 10 will be described. FIG. 8 is a diagram schematically showing the axial positional relationship between the base portion 110A of the smoking article 110 and the heating member 43 and the inner tube 42 of the flavor attractor 10 in the present embodiment. The axis referred to here means the central axis of the first opening 42a in the flavor attractor 10. When the smoking article 110 is inserted into the first opening 42a, its axis partially overlaps with the central axis of the smoking article 110.

[0051] When the axial length of the heating member 43 is D0 and the axial length of the base portion 110A of the smoking article 110 is L0, the length D0 can be made smaller than the length L0 (D0 < L0). Further, the ratio of the length D0 to the length L0 (D0 / L0) is 0.70 or more and 0.90 or less, preferably 0.75 or more and 0.85 or less, and typically may be 0.80. Therefore, when the length L0 of the base portion 110A is 20 mm, the length D0 of the heating member 43 is 14 mm or more and 18 mm or less, preferably 15 mm or more and 17 mm or less, and typically may be 16 mm. By setting the ratio of the length D0 to the length L0 (D0 / L0) within the above range, the heating member 43 can be miniaturized in the longitudinal direction while achieving a desired aerosol generation amount.

[0052] Referring to Fig. 8, the upstream end of the base member 110A may protrude by a length D1 upstream of the upstream end of the heating member 43. Here, the upstream and downstream refer to the upstream and downstream of the air flow passing through the air flow path 70 by the user's suction operation, respectively (see Fig. 4). Since the protruding portion of the base member 110A from the heating member 43 does not have the heating member 43 on its radially outer side, its internal temperature can be somewhat lower compared to other portions of the base member 110A. Thereby, aerosol generation at the upstream end of the base member 110A and in its vicinity can be suppressed, so that the aerosol generated there can be prevented from condensing in the air flow path or flowing back through the air flow path and leaking to the outside of the apparatus. The ratio (D1 / L0) of the protruding length D1 to the overall length L0 of the base member 110A is 0.25 or more and 0.40 or less, preferably 0.30 or more and 0.35 or less, and typically may be 0.325. Thus, when the overall length L0 of the base member 110A is 20 mm, the protruding length D1 may be 5 mm or more and 8 mm or less, preferably 6 mm or more and 7 mm or less, and typically may be 6.5 mm. Note that the protruding length D1 here can also be said to be the distance in the axial direction between the upstream end of the heating member 43 and the upstream end of the inner tube 42. By setting the ratio (D1 / L0) of the protruding length D1 to the length L0 within the above range, sufficient aerosol generation in other portions of the base member 110A can be realized while suppressing aerosol generation at the upstream end of the base member 110A and in its vicinity.

[0053] Referring to FIG. 8, the downstream end of the heating member 43 may protrude by a length D2 downstream of the downstream end of the base material portion 110A. Thereby, since the downstream end of the base material portion 110A and the vicinity thereof can be sufficiently heated, it is possible to prevent a shortage of the aerosol generation amount or aerosol condensation from occurring there. The ratio (D2 / L0) of the protruding length D2 of the heating member 43 to the length L0 of the base material portion 110A is 0.075 or more and 0.175 or less, preferably 0.1 or more and 0.15 or less, and typically may be 0.125. Therefore, when the length L0 of the base material portion 110A is 20 mm, the protruding length D2 of the heating member 43 may be 1.5 mm or more and 3.5 mm or less, preferably 2 mm or more and 3 mm or less, and typically 2.5 mm. By setting the ratio (D2 / L0) of the protruding length D2 to the length L0 within the above range, while realizing sufficient aerosol generation at the downstream end of the base material portion 110A and the vicinity thereof, it is possible to suppress the increase in size in the longitudinal direction of the heating member 43.

[0054] The axial positions of the upstream end of the inner tube 42 and the upstream end of the base material portion 110A may generally coincide. On the other hand, the downstream end of the inner tube 42 may protrude by a length D3 downstream of the downstream end of the base material portion 110A, similarly to the downstream end of the heating member 43. Thereby, in addition to the downstream end of the base material portion 110A and the vicinity thereof, the upstream end of the paper tube portion 114 and the vicinity thereof can be heated, so that it is possible to prevent the aerosol generated from the base material portion 110A from being excessively cooled and condensed at the upstream end of the paper tube portion 114 and the vicinity thereof. The ratio (D3 / D2) of the protruding length D3 of the inner tube 42 to the protruding length D2 of the heating member 43 is 2.6 or more and 3.4 or less, preferably 2.8 or more and 3.2 or less, and typically may be 3.0. Therefore, when the protruding length D2 of the heating member 43 is 2.5 mm, the protruding length D3 of the inner tube 42 may be 6.5 mm or more and 8.5 mm or less, preferably 7.0 mm or more and 8.0 mm or less, and typically 7.5 mm. By setting the ratio (D3 / D2) of the protruding length D3 to the protruding length D2 within the above range, while preventing aerosol condensation at the upstream end of the paper tube portion 114 and the vicinity thereof, it is possible to suppress the increase in size in the longitudinal direction of the heating member 43.

[0055] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications are possible within the scope of the technical idea described in the claims, the specification, and the drawings. Note that any shape or material not directly described in the specification and the drawings is within the scope of the technical idea of the present invention as long as it exhibits the functions and effects of the present invention.

[0056] Some of the forms disclosed in this specification are described below.

[0057] According to the first form, a heating assembly is provided that includes a first cylindrical member having a first opening at one end into which a flavor-generating article can be inserted and a second opening at the other end that forms an air inlet, a heating member, and a heat insulating material. This heating assembly further includes a second cylindrical member disposed surrounding the first cylindrical member, a sealed region is provided between the first cylindrical member and the second cylindrical member, and the heating member and the heat insulating material are accommodated in the sealed region.

[0058] According to the second form, in the heating assembly of the first form, the heating member abuts against the first cylindrical member, and the first cylindrical member is formed of a metal material.

[0059] According to the third form, in the heating assembly of the first form or the second form, the heating member is provided on the outer peripheral side of the first cylindrical member, a first resin material is provided between the heating member and the heat insulating material, and the first resin material applies stress to the heating member so as to press the heating member against the first cylindrical member.

[0060] According to the fourth form, in the heating assembly of the third form, the first resin material applies stress to the heating member so as to press the heating member against the first cylindrical member by heat shrinkage.

[0061] According to the fifth aspect, in the heating assembly of the third or fourth aspect, the upstream end of the first resin material close to the second opening protrudes outside the second cylindrical member.

[0062] According to the sixth aspect, in the heating assembly of the fifth aspect, the flavor generating article can be inserted, and it has a third cylindrical member having an internal space communicating with the first opening of the first cylindrical member. The third cylindrical member is connected to the downstream end on the first opening side of the first cylindrical member, and the downstream end of the first resin material close to the first opening surrounds the outer periphery of the upstream end connected to the first opening of the third cylindrical member.

[0063] According to the seventh aspect, in the heating assembly of the sixth aspect, the upstream end of the third cylindrical member surrounds the outer periphery of the downstream end of the first cylindrical member.

[0064] According to the eighth aspect, in the heating assembly of any one of the third to seventh aspects, the length of the first resin material in the axial direction is substantially the same as the length of the first cylindrical member in the axial direction.

[0065] According to the ninth aspect, in the heating assembly of any one of the third to eighth aspects, the first resin material is longer than the heating member in the axial direction, and the heating member is located between the upstream end close to the second opening and the downstream end close to the first opening of the first resin material.

[0066] According to the tenth aspect, in the heating assembly of any one of the third to ninth aspects, it has a fourth cylindrical member that is connected to the upstream end on the second opening side of the first cylindrical member and forms an internal flow path for introducing air toward the second opening of the first cylindrical member. The upstream end of the first resin material close to the second opening surrounds the outer periphery of the fourth cylindrical member.

[0067] According to the eleventh aspect, in the heating assembly of the tenth aspect, the downstream end of the fourth cylindrical member close to the second opening surrounds the outer periphery of the upstream end of the first cylindrical member.

[0068] According to the 12th aspect, in any of the heating assemblies of the 1st to 11th aspects, the upstream end on the second opening side and the downstream end on the first opening side of the first cylindrical member project outside the second cylindrical member, and the heating member is accommodated in the axial direction between the upstream end close to the second opening and the downstream end close to the first opening of the second cylindrical member.

[0069] According to the 13th aspect, in any of the heating assemblies of the 1st to 12th aspects, the heat insulating material extends in the axial direction at least between the upstream end close to the second opening and the downstream end close to the first opening of the heating member.

[0070] According to the 14th aspect, in any of the heating assemblies of the 1st to 13th aspects, an annular member extending in the circumferential direction is provided between the end on the first opening side of the first cylindrical member and the end close to the first opening of the second cylindrical member, and between the end on the second opening side of the first cylindrical member and the end close to the second opening of the second cylindrical member, respectively.

[0071] According to the 15th aspect, in the heating assembly of the 14th aspect, the annular member is formed of a material having a lower thermal conductivity than the first cylindrical member and the second cylindrical member.

[0072] According to the 16th aspect, in any of the heating assemblies of the 1st to 15th aspects, the heat insulating material contains an aerogel.

[0073] According to the 17th aspect, in the heating assembly of the 16th aspect, the ratio of the volume of the heat insulating material to the volume of the sealed region is 85% or more and 100% or less.

[0074] According to the 18th aspect, in any of the heating assemblies of the 1st to 17th aspects, it has a heater tail portion that electrically connects the heating member to a control unit, and at least a part of the heater tail portion extends along the outer surface of the first cylindrical member and projects outside the sealed region.

[0075] According to the 19th aspect, in any of the heating assemblies of the 1st to 18th aspects, the heating member is configured to heat the flavor-generating article. When the length in the axial direction of the flavor-generating base material of the flavor-generating article is L0 and the length in the axial direction of the heating member is D0, D0 / L0 is 0.7 or more and 0.9 or less.

[0076] According to the 20th aspect, in the heating assembly of the 19th aspect, D0 / L0 is 0.75 or more and 0.85 or less.

[0077] According to the 21st aspect, in any of the heating assemblies of the 1st to 20th aspects, the heating member is configured to heat the flavor-generating article. When the length in the axial direction of the flavor-generating base material of the flavor-generating article is L0 and the distance in the axial direction between the upstream end of the heating member and the upstream end of the first cylindrical member is D1, D1 / L0 is 0.25 or more and 0.40 or less.

[0078] According to the 22nd aspect, in the heating assembly of the 21st aspect, D1 / L0 is 0.30 or more and 0.35 or less.

[0079] According to the 23rd aspect, in any of the heating assemblies of the 1st to 22nd aspects, in a state where the flavor-generating article is housed inside the first cylindrical member such that the upstream end of the flavor-generating article and the upstream end of the first cylindrical member coincide in the axial direction, the downstream end of the heating member is located on the downstream side of the downstream end of the flavor-generating base material of the flavor-generating article. When the distance in the axial direction between the downstream end of the heating member and the downstream end of the flavor-generating base material of the flavor-generating article is D2 and the length in the axial direction of the flavor-generating base material of the flavor-generating article is L1, D2 / L1 is 0.075 or more and 0.175 or less. The heating member is configured to heat the flavor-generating article. When the length in the axial direction of the flavor-generating base material of the flavor-generating article is L0 and the distance in the axial direction between the upstream end of the heating member and the upstream end of the first cylindrical member is D1, D1 / L0 is 0.25 or more and 0.40 or less.

[0080] According to the 24th aspect, in the heating assembly of the 23rd aspect, D2 / L1 is 0.1 or more and 0.15 or less.

[0081] According to the 25th aspect, in any of the heating assemblies of the 1st to 23rd aspects, in a state where the fragrance - generating article is accommodated inside the first cylindrical member such that the upstream end of the fragrance - generating article coincides with the upstream end of the first cylindrical member in the axial direction, the downstream end of the heating member and the downstream end of the first cylindrical member are located downstream of the downstream end of the fragrance - generating base material of the fragrance - generating article, and the downstream end of the first cylindrical member is located downstream of the downstream end of the heating member. When the axial distance between the downstream end of the heating member and the downstream end of the fragrance - generating base material of the fragrance - generating article is D2, and the axial distance between the downstream end of the first cylindrical member and the downstream end of the fragrance - generating base material of the fragrance - generating article is D3, D3 / D2 is 2.6 or more and 3.4 or less.

[0082] According to the 26th aspect, in the heating assembly of the 25th aspect, D3 / D2 is 2.8 or more and 3.2 or less.

[0083] According to the 27th aspect, there is provided a fragrance attractor including any of the heating assemblies of the 1st to 26th aspects.

[0084] According to the 28th aspect, there is provided a fragrance attractor including an air flow path for air - communicating an air inlet and an air outlet. The air flow path includes a first hollow tube forming part of an opening for accommodating a fragrance source from the outside, a second hollow tube forming part of a heating assembly, and a third hollow tube having a locking part for positioning the fragrance source. In the direction from the air inlet toward the air outlet, the third hollow tube, the second hollow tube, and the first hollow tube are arranged in this order. The first hollow tube and the second hollow tube, and the second hollow tube and the third hollow tube each have an overlapping region in the longitudinal direction, and all of the overlapping regions are sealed.

[0085] According to the 29th aspect, in the fragrance attractor of the 28th aspect, the second hollow tube has a cylindrical shape.

[0086] According to the 30th embodiment, in the fragrance attractor of the 28th or 29th embodiment, the second hollow tube is configured to accommodate the fragrance source therein and come into contact with at least a part of the fragrance source.

[0087] According to the 31st embodiment, in the fragrance attractor of any one of the 28th to 30th embodiments, the first hollow tube has a receiving portion in the overlapping region, the inner diameter of which is larger than the outer diameter of the downstream end of the second hollow tube and which is capable of accommodating the downstream end of the second hollow tube.

[0088] According to the 32nd embodiment, in the fragrance attractor of any one of the 28th to 31st embodiments, the third hollow tube has a receiving portion in the overlapping region, the inner diameter of which is larger than the outer diameter of the upstream end of the second hollow tube and which is capable of accommodating the upstream end of the second hollow tube.

[0089] According to the 33rd embodiment, in the fragrance attractor of any one of the 28th to 32nd embodiments, the third hollow tube has a first fragrance source locking portion in a region different from the overlapping region, the inner diameter of which is smaller than the inner diameter of the second hollow tube.

[0090] According to the 34th embodiment, in the fragrance attractor of any one of the 28th to 33rd embodiments, it has a fourth hollow tube disposed surrounding the second hollow tube, and the upstream end of the fourth hollow tube surrounds the downstream end of the third hollow tube and / or the downstream end of the fourth hollow tube surrounds the upstream end of the first hollow tube.

[0091] According to the 35th embodiment, in the fragrance attractor of any one of the 28th to 34th embodiments, the contact portion between the inner surface of the first hollow tube and the outer surface of the second hollow tube in the overlapping region is engaged by an adhesive.

[0092] According to the 36th embodiment, in the fragrance attractor of any one of the 28th to 35th embodiments, the contact portion between the outer surface of the second hollow tube and the inner surface of the third hollow tube in the overlapping region is engaged by an adhesive.

[0093] According to the 37th aspect, in any of the fragrance attractors of the 28th to 36th aspects, there is a housing that houses at least a part of each of the first hollow tube, the second hollow tube, and the third hollow tube. The housing has an inlet that communicates with the inside of the third hollow tube, and an end of the third hollow tube that is different from the end having the overlapping region with the second hollow tube is disposed adjacent to the inlet of the housing.

[0094] According to the 38th aspect, in any of the fragrance attractors of the 28th to 37th aspects, the first hollow tube has a second fragrance source locking portion on its inner surface for locking the fragrance source.

[0095] According to the 39th aspect, in any of the fragrance attractors of the 28th to 38th aspects, the second hollow tube is formed of a metal material, and the first hollow tube and the third hollow tube are formed of a resin material.

[0096] According to the 40th aspect, in any of the fragrance attractors of the 28th to 39th aspects, there is a sleeve member having an opening, and the sleeve member forms a part of the opening.

[0097] According to the 41st aspect, in the fragrance attractor of the 40th aspect, an end of the first hollow tube that is different from the end having the overlapping region with the second hollow tube engages with the sleeve member.

[0098] According to the 42nd aspect, in the fragrance attractor of the 41st aspect, a hollow rubber material is provided at the engaging end of the sleeve member and the first hollow tube.

[0099] According to the 43rd aspect, in the fragrance attractor of the 42nd aspect, the sleeve member has a housing portion for housing the rubber material.

[0100] According to the 44th aspect, in any of the fragrance attractors of the 40th to 43rd aspects, the inner diameter of the sleeve member is larger than the outer diameter of the first hollow tube, and the sleeve member surrounds at least a part of the first hollow tube.

[0101] According to the 45th aspect, in any of the fragrance attractors of the 40th to 44th aspects, there is a movable lid member for permitting or restricting access of the fragrance source to the opening of the sleeve member or the inner wall portion of the first hollow tube.

[0102] According to the 46th aspect, in any of the fragrance attractors of the 28th to 45th aspects, the second hollow tube defines a part of a space for accommodating a heating member for heating the fragrance source. to be.

[0103] According to the 47th aspect, in any of the fragrance attractors of the 28th to 46th aspects, when the maximum inner diameter of the third hollow tube is Smax and the maximum outer diameter of the fragrance source is Sc, Sc / Smax is 1.4 or more and 2.34 or less.

[0104] According to the 48th aspect, in the fragrance attractor of the 47th aspect, Sc / Smax is 1.56 or more and 2.01 or less.

Explanation of Reference Numerals

[0105] 10... Fragrance attractor 11... Housing 12... Cover 12a... Opening 14... Lid part 15... Vent 16... Cap 17... Outer fin 17a... Accommodating part 21... Power supply 24... Rubber material 30... Circuit part 41... Heating assembly 42... Inner tube 43... Heating member 44... Aerogel 45... Outer tube 46... First annular member 47... Second annular member 48... Top cap 50... Bottom cap 50c…Small diameter part 50d…Engaging part 52…Heat shrinkable tube 54…Sealed area 56…Heater tail part 70…Air flow path 110…Smoking article 111…Filling

Claims

1. A first cylindrical member having a first opening at one end into which a fragrance-generating article can be inserted and a second opening at the other end forming an air inlet; A second cylindrical member disposed surrounding the first cylindrical member; A third cylindrical member connected to the upstream end of the first cylindrical member on the second opening side and having an internal flow path for introducing air into the second opening, and having: The downstream end of the third cylindrical member surrounds the outer periphery of the upstream end of the first cylindrical member, A fragrance suction device configured such that the inner surface of the third cylindrical member and the outer surface of the first cylindrical member are in contact and the connection portion between the inner surface and the outer surface is configured so that gas or aerosol does not pass through.

2. In the fragrance suction device according to Claim 1, The third cylindrical member has a small-diameter portion having an inner diameter smaller than the inner diameter of the first cylindrical member. A fragrance suction device.

3. In the fragrance suction device according to Claim 2, The third cylindrical member has a stepped locking portion formed by a portion surrounding the outer periphery of the upstream end of the first cylindrical member and the small-diameter portion. A fragrance suction device.

4. In the fragrance suction device according to Claim 3, The upstream end of the first cylindrical member is disposed so as to abut against the locking portion. A fragrance suction device.

5. In the fragrance suction device according to any one of Claims 1 to 4, It has a fourth cylindrical member into which the fragrance-generating article can be inserted and having an internal space communicating with the first opening of the first cylindrical member, The upstream end of the fourth cylindrical member is connected to the downstream end of the first cylindrical member on the first opening side. A fragrance suction device.

6. In the fragrance suction device according to Claim 5, The upstream end of the fourth cylindrical member surrounds the outer periphery of the downstream end of the first cylindrical member. A fragrance suction device.

7. In the fragrance suction device according to Claim 5 or 6, It has a fifth cylindrical member forming a part of an opening for accommodating the fragrance-generating article and engaging with the downstream end of the fourth cylindrical member. A fragrance suction device.

8. In the fragrance suction device according to Claim 7, The upstream end of the fifth cylindrical member surrounds the outer periphery of the downstream end of the fourth cylindrical member. A fragrance suction device.

9. In the fragrance suction device according to Claim 7 or 8, The connection portion between the fifth cylindrical member and the fourth cylindrical member is sealed with a rubber material. A fragrance suction device.

10. In the fragrance suction device according to Claim 9, The rubber material is annular and extends circumferentially between the outer peripheral surface of the fourth cylindrical member and the inner peripheral surface of the fifth cylindrical member, the fragrance suction device.

11. In the fragrance suction device according to claim 9 or 10, The fifth cylindrical member has a housing portion for housing the rubber material, the fragrance suction device.

12. In the fragrance suction device according to any one of claims 1 to 11, The fragrance suction device having a heat insulating material between the first cylindrical member and the second cylindrical member.

13. In the fragrance suction device according to claim 12, The heat insulating material includes an aerogel, the fragrance suction device.

14. In the fragrance suction device according to any one of claims 1 to 13, The fragrance suction device having a heat shrinkable tube between the first cylindrical member and the second cylindrical member.

15. In the fragrance suction device according to any one of claims 1 to 14, A sealed region is provided between the first cylindrical member and the second cylindrical member, the fragrance suction device.

16. A fragrance suction system having the fragrance suction device according to any one of claims 1 to 15, And the fragrance generating article.

17. In the fragrance suction system according to claim 16, The fragrance suction device has a heating member, The fragrance generating article has a base material portion and a paper tube portion adjacent to the downstream side of the base material portion, In a state where the fragrance generating article is housed in the first cylindrical member, a downstream end of the heating member protrudes to a downstream side of a downstream end of the base material portion, the fragrance suction system.

18. In the fragrance suction system according to claim 17, A ratio (D2 / L0) of the protruding length D2 of the heating member to the length L0 of the base material portion is 0.075 or more and 0.175 or less, the fragrance suction system.

19. In the fragrance suction system according to claim 17 or 18, The protruding length D2 of the heating member is 1.5 mm or more and 3.5 mm or less, the fragrance suction system.

20. In the fragrance suction system according to claim 16, The fragrance generating article has a base material portion and a paper tube portion adjacent to the downstream side of the base material portion, In a state where the fragrance generating article is housed in the first cylindrical member, the downstream end of the first cylindrical member protrudes to a downstream side of a downstream end of the base material portion, the fragrance suction system.

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