JP7464574B2 - Heated tobacco products - Google Patents

Description

The present invention relates to a heated tobacco product.

Heated tobacco products having a tobacco rod formed by filling the inside of a cigarette paper with a tobacco filler material containing tobacco raw materials (e.g., tobacco shreds, tobacco granules, molded tobacco sheets, etc.) and an aerosol-generating base material (glycerin, propylene glycol, etc.) are known (see, for example, Patent Document 1). This type of heated tobacco product is a type of tobacco product in which the tobacco filler is heated by an electric heater in a heating device without being burned, and the aerosol generated in the tobacco filler is delivered to the user. Electric heaters of various shapes, such as blade-shaped and rod-shaped heaters, have been put into practical use, and when in use, the tobacco rod is attached to the heating device by inserting the electric heater from the tip surface of the tobacco rod.

Japanese Patent No. 5920744 Patent No. 5348648

However, in conventional heated tobacco products, there is a large insertion resistance when inserting the electric heater from the tip surface of the tobacco rod, and there is a risk that the electric heater may be damaged, such as broken or bent, when inserted into the tobacco rod (tobacco filler), that the tobacco filler that constitutes the tobacco rod may be pushed into the mouthpiece side, or that the tobacco rod may buckle and deform.

The present invention was made in consideration of the above-mentioned circumstances, and its purpose is to provide a technology for preventing damage such as bending or folding of the electric heater when inserted into the tobacco rod, the tobacco filler that constitutes the tobacco rod being pushed into the mouthpiece, and buckling deformation of the tobacco rod, in a heated tobacco cigarette having a tobacco rod formed by filling the inside of a cigarette paper with a tobacco filler material that includes tobacco raw materials and an aerosol-generating base material.

The heated tobacco according to the present invention, which aims to solve the above problems, is a heated tobacco having a tobacco rod formed by filling the inside of a cigarette paper with a tobacco filler material containing tobacco raw materials and an aerosol-generating base material, and is characterized in that it has a heater insertion cavity that opens on the tip end side of the tobacco rod and extends along the axial direction of the tobacco rod, into which a heater of a heating device is inserted.

Here, the cross-sectional area of the heater insertion cavity perpendicular to the axial direction of the tobacco rod may be smaller than the cross-sectional area of each opposing portion of the heater when inserted into the tobacco rod to a specified depth.

The cross-sectional area of the heater insertion cavity perpendicular to the axial direction of the tobacco rod may be set to be within a range of 70% to 99% of the cross-sectional area of each opposing portion of the heater when inserted into the tobacco rod to a specified depth.

The heater insertion cavity may also have a cylindrical shape with a diameter of 1 mm or more and 4 mm or less.

The heater insertion cavity may have a tapered cone shape along the axial direction of the tobacco rod, a diameter at a first end position located on the tip end side of the tobacco rod of 1 mm or more and 4 mm or less, and a diameter at a second end position located on the opposite side to the tip end of the tobacco rod of 0 mm or more and 0.5 mm or less.

The heater insertion cavity may have a tapered truncated cone shape along the axial direction of the tobacco rod, a diameter of 1 mm or more and 4 mm or less at a first end position located on the tip end side of the tobacco rod, and a diameter of 0.5 mm or more and 3.5 mm or less at a second end position located on the opposite side to the tip end.

The heated tobacco may also have a filter coaxially connected to the base end of the tobacco rod, and the filter may include a cooling section for cooling the volatile substances released from the aerosol-generating substrate contained in the tobacco filler.

In addition, in the heated tobacco product according to the present invention, the filter may be disposed at a connection end connected to the base end side of the tobacco rod, and may include a support portion that supports the tobacco filler to prevent the tobacco filler from being pushed toward the mouth end side of the filter when the heater is inserted into the heater insertion cavity.

In addition, in the heated tobacco product according to the present invention, the filter may include a mouthpiece portion disposed on the mouth end side of the filter.

The heater insertion cavity may be formed as a through hole that passes through the tobacco rod, or as a recess that does not pass through the tobacco rod.

The means for solving the problems in this invention can be combined as much as possible.

The present invention provides a technology for preventing damage such as bending or folding of the electric heater when inserted into the tobacco rod, for example, for preventing the tobacco filler constituting the tobacco rod from being pushed into the mouthpiece, and for preventing the tobacco rod from buckling and deforming, in a heated tobacco cigarette having a tobacco rod formed by filling the inside of a cigarette paper with a tobacco filler material containing tobacco raw materials and an aerosol-generating base material.

FIG. 1 is a diagram illustrating a schematic internal structure of a heated tobacco product according to a first embodiment. FIG. 2 is a diagram showing details of a tobacco rod in a heat-not-burn tobacco product. FIG. 3 is a schematic diagram of a heating device to which a heated tobacco product is applied. FIG. 4 is a diagram showing a state in which an electric heater is inserted into a tobacco rod to a specified depth when the tobacco rod is attached to a receiving cavity in a heating device. FIG. 5 is a diagram illustrating a tobacco rod according to a first modified example. FIG. 6 is a diagram showing a state in which a tobacco rod according to a first modified example is attached to an accommodating cavity in a heating device. FIG. 7 is a diagram illustrating a tobacco rod according to a second modified example. FIG. 8 is a diagram showing a state in which a tobacco rod according to a second modified example is attached to an accommodating cavity in a heating device. FIG. 9A is a diagram illustrating a heater insertion cavity according to a third modified example. FIG. 9B is a diagram illustrating a heater insertion cavity according to the fourth modified example. FIG. 9C is a diagram illustrating a heater insertion cavity according to a fifth modified example.

Here, an embodiment of the heated tobacco product according to the present invention will be described with reference to the drawings. Note that the dimensions, materials, shapes, relative positions, etc. of the components described in this embodiment are not intended to limit the technical scope of the invention to those alone, unless otherwise specified.

<Embodiment 1>
[Heated tobacco products]
1 is a diagram showing a schematic internal structure of a heated tobacco product 1 according to embodiment 1. The heated tobacco product 1 is a type of tobacco product that heats a tobacco filler without burning it, and delivers an aerosol generated in the tobacco filler to a user.

The heated tobacco 1 comprises a tobacco rod 2 and a filter 3 aligned coaxially. The heated tobacco 1 has a mouth end 1a that the user inserts into the mouth during use, and a tip 1b at the end opposite the mouth end 1a. The filter 3 has a support section 4, a cooling section 5, and a mouthpiece section 6 aligned coaxially, and these components are arranged in order from the tip side of the filter 3. The support section 4, cooling section 5, and mouthpiece section 6 of the filter 3 are wound together with wrapping paper 7. Furthermore, the tobacco rod 2 and the filter 3 are connected together by being wound with tipping paper 8.

When the heated tobacco 1 is in use, air is drawn by the user through the heated tobacco 1 from the tip 1b to the mouth end 1a. The tip 1b of the heated tobacco 1 can be considered as the tip or upstream end of the tobacco rod 2, and the mouth end 1a of the heated tobacco 1 can be considered as the rear end or downstream end of the mouthpiece portion 6.

The tobacco rod 2 is disposed at the tip 1b of the heated tobacco 1. The tobacco rod 2 is a rod-shaped member wrapped in cigarette paper 22 so as to cover the sides of the tobacco filler 21 containing the tobacco raw material and the aerosol generating base material. In this embodiment, the tobacco raw material contained in the tobacco filler 21 may include one or more of tobacco shreds, tobacco granules, and reconstituted tobacco material. In this embodiment, the tobacco filler 21 is a reconstituted tobacco material. The reconstituted tobacco material may be a granular or powdered form obtained by cutting or grinding a reconstituted tobacco sheet into small pieces, or a reconstituted tobacco sheet that is folded without being cut. The reconstituted tobacco sheet is, for example, a homogenized tobacco that is mixed with a binder, a gelling agent, a crosslinking agent, a flavoring, a viscosity modifier, etc., and formed into a sheet by an appropriate method. The homogenized tobacco is a tobacco material obtained by grinding, grinding, and mixing leaf tobacco, dried tobacco leaves, shredded tobacco, expanded tobacco, reconstituted tobacco, etc. The reconstituted tobacco sheet may be a reconstituted tobacco slurry sheet (reconstituted tobacco cast sheet), a reconstituted tobacco paper sheet, or a reconstituted tobacco rolled sheet formed using an appropriate method such as a slurry method, a paper-making method, or a rolling method. For example, a reconstituted tobacco slurry sheet is a reconstituted tobacco sheet produced by drying and dehydrating a reconstituted tobacco slurry spread on a flat plate. A reconstituted tobacco paper sheet is a reconstituted tobacco sheet produced by blending pulp (cellulose fiber) with a reconstituted tobacco slurry and making paper from the mixture. A reconstituted tobacco rolled sheet is a reconstituted tobacco sheet produced by rolling a reconstituted tobacco slurry into a sheet shape using a roller or the like, and drying the sheet.

The aerosol-generating base material contained in the tobacco filler 21 is a substance that generates an aerosol when the volatile substance that is evaporated and released is cooled. The type of aerosol-generating base material is not particularly limited, and various extracts from natural products can be appropriately selected depending on the application. Examples of aerosol-generating base materials include glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof. The tobacco filler 21 may also contain a flavoring. The type of flavoring is not particularly limited.

The support part 4 is a segment located on the front end side of the filter 3. The support part 4 is located immediately downstream of the tobacco rod 2 and is arranged in contact with the rear end of the tobacco rod 2. The support part 4 may be, for example, a hollow cellulose acetate tube. In other words, the support part 4 may be a cylindrical cellulose acetate fiber bundle with a center hole formed through the center of the cross section. The support part 4 may also be in other forms such as a paper filter filled with cellulose fibers or a paper tube. Any paper tube with a certain thickness can effectively function as the support part 4. The support part 4 is a segment for preventing the tobacco filler 21 from being pushed downstream toward the cooling part 5 in the heated tobacco 1 when the electric heater of the heating device to which the heated tobacco 1 is applied is inserted into the tobacco rod 2. The support part 4 also functions as a spacer for separating the cooling part 5 of the heated tobacco 1 from the tobacco rod 2.

The cooling section 5 is located immediately downstream of the support section 4 and is disposed in contact with the rear end of the support section 4. When the heated tobacco 1 is used, the volatile substances released from the tobacco rod 2 (tobacco filler 21) flow downstream along the cooling section 5. The volatile substances released from the tobacco rod 2 (tobacco filler 21) are cooled by the cooling section 5 to form an aerosol that is inhaled by the user. In the embodiment shown in FIG. 1, the cooling section 5 is formed of a hollow paper tube having an air hole 5a that can introduce outside air. However, the cooling section 5 does not have to have the air hole 5a. The cooling section 5 may also have a heat absorbing agent arranged so as not to interfere with the flow of the volatile substances and aerosol. For example, the cooling section 5 may be formed of a filter material in which a large number of flow paths (through holes) are formed along the longitudinal direction (axial direction) of the filter 3.

The mouthpiece section 6 is a segment located at the rear end of the filter 3, i.e., on the mouth end 1a side. The mouthpiece section 6 may be located immediately downstream of the cooling section 5 and may be disposed in contact with the rear end of the cooling section 5. In the embodiment shown in FIG. 1, the mouthpiece section 6 may be provided with a filter material formed of cellulose acetate fibers formed into a cylindrical shape, for example. The mouthpiece section 6 may also be a center hole filter, a paper filter filled with cellulose fibers, or a paper tube without a filter material. The mouthpiece section 6 may be formed of any of a solid filter material with a filter material, a center hole filter, a paper filter, and a paper tube without a filter material, or may be formed by selectively combining a plurality of these.

FIG. 2 is a diagram showing details of the tobacco rod 2 in the heated tobacco product 1. As shown in FIG. 2, a heater insertion cavity 23 for inserting a heater of a heating device is opened in the front end surface 2a of the tobacco rod 2 (tobacco filler 21). In the example shown in FIG. 2, the heater insertion cavity 23 is formed as a non-penetrating recess (hollow portion) along the axial direction of the tobacco rod 2 (tobacco filler 21). However, the heater insertion cavity 23 may be formed as a hollow portion penetrating along the axial direction of the tobacco rod 2 (tobacco filler 21). In the embodiment shown in FIG. 2, the heater insertion cavity 23 has a tapered conical shape that decreases in diameter from the front end surface 2a of the tobacco rod 2 (tobacco filler 21) toward the rear end, but may also have a tapered truncated conical shape that decreases in diameter from the front end surface 2a toward the rear end. The shape of the heater insertion cavity 23 is not particularly limited, and may have a shape other than a conical shape or a truncated conical shape, for example, a cylindrical shape. The reference symbol CL1 shown in FIG. 2 is the central axis of the tobacco rod 2. The heater insertion cavity 23 may be formed coaxially with the central axis CL1 of the tobacco rod 2.

Here, it is preferable that the heater insertion cavity 23 of the tobacco rod 2 (tobacco filler 21) has a diameter of 1 mm or more and 4 mm or less at the position of the first end 23a located on the tip surface 2a side of the tobacco rod 2, and a diameter of more than 0 mm and 0.5 mm or less at the position of the second end 23b located on the opposite side to the tip surface 2a. It is preferable that the heater insertion cavity 23 has a diameter of 10% or more and 80% or less of the diameter of the tobacco rod 2 at the position of the first end 23a located on the tip surface 2a side of the tobacco rod 2, and a diameter of more than 0% and 10% or less of the diameter of the tobacco rod 2 at the position of the second end 23b.

Figure 3 is a schematic diagram of a heating device 100 to which the heated tobacco product 1 of the first embodiment is applied. The heating device 100 has a housing 102, which is a case for accommodating various components. An electric heater 103, a controller (control unit) 104, a power source 105, etc. are accommodated in the housing 102. The housing 102 has a storage cavity 107 including an opening 106 into which the tobacco rod 2 of the heated tobacco product 1 is inserted. The storage cavity 107 is a hollow portion having a cylindrical shape, and can accommodate the tobacco rod 2.

As shown in FIG. 3, an electric heater 103 is provided in the storage cavity 107. The electric heater 103 has a conical shape and protrudes vertically from the center of the bottom 107a of the storage cavity 107 toward the opening 106, gradually tapering from the base end 103a toward the tip end 103b. The central axis of the electric heater 103 is coaxial with the central axis of the storage cavity 107. The type of electric heater 103 is not particularly limited, but may be, for example, a steel material with heating wires (e.g., nichrome, iron chrome, iron nickel, etc.) strung around it, or a ceramic heater, etc.

The heated tobacco 1 configured as above has a heater insertion cavity 23 formed in the tobacco rod 2 (tobacco filler 21). When the tobacco rod 2 is attached to the storage cavity 107 of the heating device 100, the electric heater 103 is inserted into the heater insertion cavity 23 of the tobacco rod 2 (tobacco filler 21), thereby reducing the insertion resistance when inserting the electric heater 103 into the tobacco filler 21. This improves usability when the tobacco rod 2 is attached to the heating device 100 (when the electric heater 103 is inserted into the tobacco rod 2). In addition, when the electric heater 103 is inserted into the tobacco rod 2, damage such as bending or buckling of the electric heater 103 can be suppressed. In addition, when the tobacco rod 2 is attached to the storage cavity 107 of the heating device 100, the tobacco filler 21 of the tobacco rod 2 can be suppressed from being pushed into the mouthpiece side.

In addition, in this embodiment, since the heater insertion hollow portion 23 of the tobacco rod 2 (tobacco filler 21) has a conical shape, when the electric heater 103 is inserted into the heater insertion hollow portion 23, the tobacco filler 21 surrounding the lateral periphery of the heater insertion hollow portion 23 and the electric heater 103 can be suitably brought into close contact with each other, and the heat conduction from the electric heater 103 to the tobacco filler 21 can be improved. Furthermore, even when the tobacco rod 2 of the heated tobacco 1 is pulled out from the storage cavity 107 of the heating device 100 after use, the frictional force generated between the electric heater 103 and the tobacco filler 21 is small, so that the tobacco filler 21 is unlikely to fall off. In addition, since the tobacco filler 21 is unlikely to burn out during use, the tobacco filler 21 is unlikely to fall off when the tobacco rod 2 is pulled out from the storage cavity 107 of the heating device 100 after use.

Here, the heater insertion cavity 23 of the tobacco rod 2 (tobacco filler 21) in this embodiment may have a cross-sectional area perpendicular to the central axis CL1 direction of the tobacco rod 2 smaller than the cross-sectional area of each opposing portion of the electric heater 103 when inserted into the tobacco rod 2 to a specified depth. FIG. 4 is a diagram showing a state in which the electric heater 103 is inserted into the tobacco rod 2 to a specified depth when the tobacco rod 2 is attached to the accommodation cavity 107 in the heating device 100. In this embodiment, the diameter (cross-sectional area) of the heater insertion cavity 23 is set to be within a range of 70% to 99% of the diameter (cross-sectional area) of each opposing portion of the electric heater 103 when inserted into the tobacco rod 2 to a specified depth. The opposing portions here refer to the portions of the electric heater 103 and the heater insertion cavity 23 that face each other when the electric heater 103 is inserted into the tobacco rod 2 to a specified depth.

In the present embodiment, if the cross-sectional area of the heater insertion cavity 23 of the tobacco rod 2 (tobacco filler 21) is made smaller than the corresponding portions of the electric heater 103 of the heating device 100 to which the heated tobacco 1 is applied, when the electric heater 103 is inserted into the heater insertion cavity 23, the electric heater 103 is inserted while pushing the heater insertion cavity 23 open. In this case, the tobacco filler 21 surrounding the lateral periphery of the heater insertion cavity 23 and the electric heater 103 can be brought into even closer contact, improving the efficiency of heat conduction from the electric heater 103 to the tobacco filler 21.

<First Modification>
Fig. 5 is a diagram illustrating a tobacco rod 2 (tobacco filler 21) according to a first modified example. The heater insertion hollow portion 23A of the tobacco rod 2 according to the first modified example has a cylindrical shape with a constant diameter along the central axis CL1 direction of the tobacco rod 2. Fig. 6 is a diagram showing a state in which the tobacco rod 2 according to the first modified example is attached to the accommodation cavity 107 of the heating device 100. Fig. 6 shows a state in which the electric heater 103A is inserted into the tobacco rod 2 to a specified depth. In this modified example, the electric heater 103A has a cylindrical shape similar to the heater insertion hollow portion 23A according to the first modified example.

The heater insertion cavity 23A according to the first modified example may also have a diameter (cross-sectional area) set to a relatively small value compared to the electric heater 103A. In this case, when the electric heater 103A is inserted into the heater insertion cavity 23A, the electric heater 103A is inserted while pushing the heater insertion cavity 23A open. This allows the tobacco filler 21 surrounding the lateral periphery of the heater insertion cavity 23A to be tightly attached to the electric heater 103A. As a result, the efficiency of heat conduction from the electric heater 103A to the tobacco filler 21 can be improved.

Here, if the heater insertion cavity 23A is made too small, the insertion resistance when inserting the electric heater 103A tends to increase, and if the heater insertion cavity 23A is made too large, the contact when inserting the electric heater 103A tends to deteriorate. Therefore, in the heater insertion cavity 23A of the first modified example, its diameter (cross-sectional area) is set to be within the range of 70% to 99% of the diameter (cross-sectional area) of the electric heater 103A. This makes it possible to achieve both the insertion resistance when inserting the electric heater 103A and the contact after insertion. As a result, it is possible to improve both the usability when the tobacco rod 2 is attached to the heating device 100 (when the electric heater 103A is inserted into the tobacco rod 2) and the heating efficiency when the tobacco filler 21 is heated by the electric heater 103A.

Furthermore, since the heater insertion cavity 23A in the first modified example has a cylindrical shape with a constant diameter, the tobacco filler 21 around the heater insertion cavity 23A can be sufficiently heated even on the second end 23b side when heated by the heater. This makes it difficult for a temperature distribution to occur in the tobacco filler 21 along the central axis CL1 direction when heated by the heater, improving the amount of aerosol delivered and the stability of the delivery.

In addition, in the first modified example, the heater insertion cavity 23A is preferably cylindrical with a diameter of 1 mm to 4 mm. In addition, the diameter of the heater insertion cavity 23A is preferably 10% to 80% of the diameter of the tobacco rod 2. For example, if the diameter of the tobacco rod 2 is 7 mm, the diameter of the heater insertion cavity 23A is preferably about 2.5 mm.

<Second Modification>
Fig. 7 is a diagram illustrating a tobacco rod 2 (tobacco filler 21) according to a second modified example. The heater insertion hollow portion 23B of the tobacco rod 2 according to the second modified example has a tapered truncated cone shape (frustum cone shape) along the central axis CL1 direction of the tobacco rod 2. Fig. 8 is a diagram showing a state in which the tobacco rod 2 according to the second modified example is attached to the accommodation cavity 107 of the heating device 100. Fig. 8 shows a state in which the electric heater 103B is inserted into the tobacco rod 2 to a specified depth. In this modified example, the electric heater 103B has a truncated cone shape (frustum cone shape) like the heater insertion hollow portion 23B according to the second modified example.

The heater insertion cavity 23B according to the second modified example may also have a diameter (cross-sectional area) set to a value smaller than the diameter (cross-sectional area) of each opposing portion of the electric heater 103B when inserted to a specified depth into the tobacco rod 2. In this case, when the electric heater 103B is inserted into the heater insertion cavity 23B, the electric heater 103B is inserted while pushing and widening the heater insertion cavity 23B. This allows the tobacco filler 21 surrounding the lateral periphery of the heater insertion cavity 23B to be in close contact with the electric heater 103B. As a result, the efficiency of heat conduction from the electric heater 103B to the tobacco filler 21 can be improved.

Here, if the heater insertion cavity 23B is made too small, the insertion resistance when inserting the electric heater 103B tends to increase, and if the heater insertion cavity 23B is made too large, the contact when inserting the electric heater 103B tends to deteriorate. Therefore, the diameter (cross-sectional area) of the heater insertion cavity 23B of the second modified example is set to be within the range of 70% to 99% of the diameter (cross-sectional area) of each opposing portion of the electric heater 103B when inserted to a specified depth into the tobacco rod 2. This makes it possible to achieve both the insertion resistance when inserting the electric heater 103B into the tobacco rod 2 and the contact after insertion. As a result, it is possible to improve both the usability when the tobacco rod 2 is attached to the heating device 100 (when the electric heater 103B is inserted into the tobacco rod 2) and the heating efficiency when the tobacco filler 21 is heated by the electric heater 103B.

In addition, the heater insertion cavity 23B in the second modified example has a truncated cone shape (truncated cone shape), so it is possible to achieve both the advantages of the heater insertion cavity 23 that has a cone shape and the heater insertion cavity 23 that has a cylindrical shape.

That is, the heater insertion cavity 23B according to the second modification is easily ensured to have a larger diameter at the second end 23b located on the mouthpiece side than the heater insertion cavity 23 adopting a conical shape, so that the central axis CL of the tobacco filler 21 is aligned with the center axis CL of the tobacco filler 21 during heating by the heater.
In addition, the heater insertion cavity 23B according to the second modification has a tapered diameter (cross-sectional area) along the central axis CL1 of the tobacco rod 2, which reduces the insertion resistance when inserting the electric heater 103B into the tobacco rod 2 and improves the contact after insertion.

Here, it is preferable that the heater insertion cavity 23B according to the second modified example has a diameter of 1 mm to 4 mm at the position of the first end 23a located on the tip surface 2a side of the tobacco rod 2, and a diameter of 0.5 mm to 3.5 mm at the position of the second end 23b located on the opposite side to the tip surface 2a. It is preferable that the heater insertion cavity 23B has a diameter of 10% to 80% of the diameter of the tobacco rod 2 at the position of the first end 23a located on the tip surface 2a side of the tobacco rod 2, and a diameter of 5% to 70% of the diameter of the tobacco rod 2 at the position of the second end 23b.

In this embodiment, the heater insertion hollow portions 23, 23A, 23B of the tobacco rod 2 (tobacco filler 21) are not limited to the cone, cylinder, and truncated cone shapes described above, and various shapes can be adopted. In addition, the number of heater insertion hollow portions 23, 23A, 23B formed in the tobacco rod 2 (tobacco filler 21) is not particularly limited. For example, the tobacco rod 2 (tobacco filler 21) may have multiple heater insertion hollow portions 23, 23A, 23B formed therein.

In addition, the heater insertion cavity 23, 23A, 23B described above are formed as non-penetrating recesses that do not penetrate the tobacco rod 2 along the central axis CL1 direction of the tobacco rod 2, but they may be formed as through holes that penetrate the tobacco rod 2. FIG. 9A is a diagram illustrating a heater insertion cavity 23C according to a third modified example. The heater insertion cavity 23C according to the third modified example has a conical shape and is the same as the heater insertion cavity 23 shown in FIG. 2 except that it is formed as a through hole that penetrates the tobacco rod 2. FIG. 9B is a diagram illustrating a heater insertion cavity 23D according to a fourth modified example. The heater insertion cavity 23D according to the fourth modified example has a cylindrical shape and is the same as the heater insertion cavity 23A shown in FIG. 5 except that it is formed as a through hole that penetrates the tobacco rod 2. FIG. 9C is a diagram illustrating a heater insertion cavity 23E according to a fifth modified example. The heater insertion cavity 23E of the fifth modified example has a truncated cone shape and is the same as the heater insertion cavity 23B shown in FIG. 7, except that it is formed as a through hole that passes through the tobacco rod 2.

As shown in Figures 9A to 9C, when the heater insertion cavities 23C, 23D, and 23E are through holes that penetrate along the central axis CL1 of the tobacco rod 2, the tobacco rod 2 after the heater insertion cavities 23C, 23D, and 23E are formed can be connected to the filter 3 by a filter tip attachment device. As a result, even if the tobacco filler 21 is pushed out toward the mouthpiece by the needle when forming the heater insertion cavities 23C, 23D, and 23E by inserting a needle into the tip surface 2a of the tobacco rod 2, no particular inconvenience will occur if the tobacco rod 2 is then connected to the filter 3.

In addition, as shown in Figures 9A to 9C, by forming the heater insertion cavities 23C, 23D, and 23E as through holes penetrating the tobacco rod 2, the tobacco filler 21 is not present downstream of the tip of the electric heater 103, so that the thermal conductivity does not decrease when the heater is heated. This makes it possible to prevent the aerosol generated when the heater is heated from being cooled and condensed in the tobacco filler 21 near the tip of the electric heater 103. As a result, the amount of aerosol delivered during use can be increased.

On the other hand, as shown in Figures 2, 5, and 7, by forming the heater insertion cavities 23, 23A, and 23B as non-through holes that do not penetrate the tobacco rod 2, for example, when forming the heater insertion cavities 23, 23A, and 23B by inserting a needle into the tip surface 2a of the tobacco rod 2, the tobacco filler 21 of the tobacco rod 2 is not pushed out toward the mouthpiece by the needle. This allows the heater insertion cavities 23, 23A, and 23B to be drilled in the filter tip attachment device after the filter 3 is connected to the tobacco rod 2, and provides excellent manufacturing suitability.

Although the embodiments of the present invention have been described above, the heated tobacco product of the present invention is not limited to these.

1... Heat-not-burn tobacco 2... Tobacco rod 3... Filter 4... Support part 5... Cooling part 6... Mouthpiece part 21... Tobacco filler 23... Cavity for inserting heater

Claims (7)

A heat-not-burn tobacco product comprising a tobacco rod formed by filling a tobacco filler material containing a tobacco raw material and an aerosol-forming base material inside a cigarette paper, the tobacco rod being inserted into a heater of a heating device from a tip end surface side of the tobacco rod when the tobacco rod is attached to the heating device ,
a heater insertion cavity portion for inserting a heater of a heating device, the heater insertion cavity portion opening on the tip end surface side of the tobacco rod and extending along the axial direction of the tobacco rod;
Preparation ,
The heater insertion cavity is formed as a recess that does not penetrate the tobacco rod.
Heated tobacco. The heater insertion cavity has a cylindrical shape with a diameter of 1 mm or more and 4 mm or less.
The heated tobacco product according to claim 1 . the heater insertion cavity has a tapered conical shape along the axial direction of the tobacco rod, a diameter at a first end position located on the tip end surface side of the tobacco rod being 1 mm or more and 4 mm or less, and a diameter at a second end position located on the opposite side to the tip end surface being greater than 0 mm and less than 0.5 mm;
The heated tobacco product according to claim 1 . the heater insertion cavity has a tapered truncated cone shape along the axial direction of the tobacco rod, a diameter at a first end position located on the tip end surface side of the tobacco rod being 1 mm or more and 4 mm or less, and a diameter at a second end position located on the opposite side to the tip end surface being 0.5 mm or more and 3.5 mm or less;
The heated tobacco product according to claim 1 . The heated tobacco has a filter coaxially connected to a base end side of the tobacco rod,
The filter includes a cooling section for cooling a volatile substance released from an aerosol-generating substrate included in the tobacco filler.
The heated tobacco product according to claim 1 . the filter is disposed at a connection end connected to a base end side of the tobacco rod, and includes a support portion that supports the tobacco filler to prevent the tobacco filler from being pushed toward the mouth end side of the filter when the heater is inserted into the heater insertion cavity.
The heated tobacco product according to claim 5. The heated tobacco product according to claim 6, wherein the filter includes a mouthpiece portion disposed on the mouth end side of the filter.

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