JP2020048555A - Heating type smoking tool and heating member therefor - Google Patents

Abstract

To provide a heating type smoking tool which is reduced in resistance in insertion of a heating member, which can suppress such a situation in which a tobacco leaf is integrated to a side of a heating tip, and can improve intensity of a heating member, and to provide the heating member.SOLUTION: A heating member 21 is formed into a sheet shape, and comprises two first end A and second end B facing each other, the first end A is provided to extend outward so as to be inserted into a flue of a heating type smoking tool from the first end A, and a width gradually becomes wider from the first end A to the second B. A heating member 21 is formed into a treasured sword shape and the first end A is narrow, so that resistance in insertion of the heating member 21 is reduced. Therefore, insertion is facilitated, in addition, such a situation in which a tobacco leaf is integrated to a side of a heating tip can be efficiently suppressed. In addition, a bottom of the heating member 21 is wide, so that intensity of the heating tip can be advantageously improved, and breakage of the heating member 21 due to repeated insertion and withdrawal of a heat stick can be prevented.SELECTED DRAWING: Figure 6

Description

  The present invention relates to tobacco substitutes, and more particularly to heated smoking articles and their heating elements.

  When the width of each section along the length of the heating tip is equal, when the heating tip is inserted into the heat stick in the smoke tube, the pressing force on the tobacco leaf at the forefront of the heating tip increases and the heating tip Because tobacco leaves are densely packed on both sides of the width, soot tends to remain.

  When the width of the base of the heating tip is small, the strength of the entire structure is reduced, and thus the breaking may occur during the insertion and removal process.

  The technical problem to be solved by the present invention is to provide an improved heating-type smoking article and its heating member.

  The present invention uses the following technical solutions to solve the technical problems. That is, the heating member of the heating-type smoking article, wherein the heating member is in a sheet shape and includes two opposing first and second ends, and from the first end into the smoke tube of the heating-type smoking article. The first end is provided to extend outward so as to be inserted, and constitutes a heating member whose width is gradually increased from the first end to the second end.

  Preferably, the end of the first end is provided with a sharp end which is advantageous for insertion into a heat stick in the chimney.

  Preferably, an included angle formed by two sides facing each other in the width direction of the acute end is larger than an included angle formed by two sides facing each other in the width direction of the second end of the heating member.

  Preferably, retreating portions are provided on two opposing sides of the width of the heating member so as to gradually reduce the thickness of the heating member toward the edge in the width direction.

  Preferably, the heating member includes two first sides and second sides facing each other in the width direction, and two first sides and second sides facing each other in the thickness direction. A chamfered portion provided on an edge of the first side and / or second side corresponding to a side, and a chamfered portion provided on an edge of the first side and / or second side corresponding to the second side. And the chamfer includes a bevel or a rounded corner.

  Preferably, a chamfered portion is provided on an edge of the first side on the first side and a second side, respectively, and a chamfered portion is provided on an edge of the second side on the first side and the second side, respectively. A rounded side or an acute side is formed on the first side and the second side of the heating member by the retreating portions of the first side and the second side, or the first side is provided. A chamfered portion is provided at an edge of the first side or the second side, and a chamfered portion is provided at an edge of the second side at the first side or the second side; An acute angle side is formed on the second side.

  Preferably, the heating member includes a sheet-shaped substrate, an insulating layer covering the sheet-shaped substrate, and a conductive path provided on the insulating layer, and the conductive path generates heat after energization.

  Preferably, the sheet-shaped substrate is made of a metal material or an alloy, and the retreating portion is formed by stamping.

  Preferably, the heating member further includes an isolation layer covering the outside of the conductive path, wherein the isolation layer is a glaze layer formed by firing glass glaze, and the outer surface of the heating member is Covered by an isolation layer.

  A heating-type smoking article, comprising a smoke tube and the heating member, wherein the heating member is removably insertable into the smoke tube from the first end.

  The following advantageous effects can be obtained by implementing the heating type smoking article and the heating member of the present invention. That is, since the heating member has a treasure sword shape and the first end is narrowed, the resistance when the heating member is inserted is reduced. Therefore, it is easy to insert, and the situation where tobacco leaves concentrate on the side of the heating chip can be effectively reduced. Further, since the bottom of the heating member is widened, it is advantageous for improving the strength of the heating chip, and the breaking of the heating member caused by repeatedly inserting and removing the heat stick is prevented.

  Hereinafter, the present invention will be further described with reference to the drawings and embodiments.

FIG. 1 is a diagram showing a cross-sectional structure when a heating member of a heating type smoking article according to an embodiment of the present invention is inserted into a smoke tube provided with a heat stick. FIG. 2 is a diagram showing the structure of the heating unit of the present invention. FIG. 3 is a diagram showing a cross-sectional structure of the heating member of FIG. FIG. 4 is an exploded view of each layer of the heating unit in the present invention. FIG. 5 is a distribution diagram of a temperature field when the heat stick is heated when the sheet-shaped substrate is metal. FIG. 6 is a diagram showing a case where the width of the heating member of FIG. 2 changes gradually. FIG. 7 is a distribution diagram of a temperature field when the heat stick is heated when the heating member is zirconia.

  Specific embodiments of the present invention will be described in detail with reference to the drawings in order to more clearly understand the technical features, objects, and effects of the present invention.

  As shown in FIGS. 1 and 2, the heating type smoking apparatus according to the preferred embodiment of the present invention includes a cylindrical smoke tube 1 and a heating unit 2. The heating unit 2 includes a heating member 21, a lead wire 22, and a mounting seat 23.

  As shown in FIGS. 1 to 3, the heating member 21 has a sheet shape, and is inserted into the smoke tube 1 so as to be removable. The heating member 21 includes two first ends A and second ends B facing each other in the length direction, and is provided so that the first ends A extend outward. The heating member 21 can be inserted into the smoke tube 1 of the heating type smoking article from the first end A.

  Heating member 21 includes two first sides C and second sides D that face each other in the width direction. The first side C and the second side D are provided with retreating parts 211 for gradually reducing the thickness of the heating member 21 toward the edge in the width direction. The center line of the heating member 21 is located at the center of the smoke tube 1, and two sides facing each other in the width direction of the heating member 21 have the same distance to the inner wall surface of the smoke tube 1.

  Since both sides of the heating member 21 are gradually reduced in thickness, the pressure from both sides of the heating member 21 to the tobacco leaves can be reduced when the heating member 21 is inserted into the heat stick 3. Therefore, the tobacco leaves on both sides corresponding to the retreating portion 211 are not compressed by a large pressing force, and the pressure of the tobacco leaves at the side ends is reduced, so that the atomization efficiency of the tobacco leaves is improved. The evacuation unit 211 may be gently moved so that the tobacco leaves do not adhere to the side end surface of the heating member 21.

  The heating member 21 includes two first sides E and second sides F that face each other in the thickness direction. The retreating part 211 includes a chamfered part provided on the first side E and the second side F corresponding to the first side C, and a first side E and a second side F corresponding to the second side D. And a chamfered portion provided on the surface.

  The chamfer includes a bevel or a rounded corner. A chamfered portion is provided on each of the edges of the first side E and the second side F of the first side C, and a chamfered portion is provided on each of the edges of the first side E and the second side F of the second side D. I have. Due to the retreating portion 211 of the first side C and the second side D, a rounded corner or an acute side is formed on the first side C and the second side D of the heating member 21.

  In another embodiment, the retreating portion 211 is provided with a chamfered portion only on the edge of the first side E or the second side F corresponding to the first side C so as to be easily formed by one stamping, and the second side is provided. A chamfer may be provided only on the edge of the first side E or the second side F corresponding to D, and the first side C and the second side may be formed with acute angles.

  The evacuation portions 211 on the two opposing sides can be gently shifted, polished smoothly, or provided with a glaze layer to effectively prevent tobacco leaves from adhering to the sides, thereby reducing the pressure on the tobacco leaves. Be relaxed.

  Further, in combination with FIG. 4, the heating member 21 includes a sheet-shaped base member 212 made of a metal material, an insulating layer 213 covering the sheet-shaped base member 212, and a conductive path 214 provided outside the insulating layer 213. Lead 22 is connected to conductive path 214. Further, the lead wire 22 is drawn out. When the lead 22 receives power and the conductive path 214 is energized, the conductive path 214 generates heat and atomizes tobacco leaves.

  Preferably, the base material of the heating member 21 is made of metal or alloy. A general-purpose metal such as stainless steel or a titanium alloy may be used as the material for the sheet-like base member 212, and preferably stainless steel such as SUS430 or SUS304 is used. Usually, the thickness of the sheet-like base material 212 is 0.2 to 0.8 mm, and is formed by stamping or wire cutting, so that the cost is low. The evacuation portion 211 in the sheet-shaped base member 212 made of a metal material can be formed by stamping, so that the cost can be further reduced. The size such as the length and width of the heating member 21 corresponds to the diameter and length of the tobacco heat stick used in combination therewith, which is advantageous for sufficient heating of tobacco leaves.

  By using the sheet-like base material 212 made of a metal material as the main body of the heating member 21, high toughness is provided, so that it is possible to effectively prevent the heating member 21 from being broken by a mechanical shock such as a high temperature or a cigarette loading for a long time. . In addition, since the sheet-like base material 212 made of a metal material has excellent thermal conductivity, the uniformity of the surface temperature of the heating member 21 is ensured, and it is advantageous for the non-burning and heating type tobacco to obtain a good mouthfeel.

  As shown in FIGS. 5 and 7, from the simulation experiment in the steady state, in the case of the same temperature field, the peripheral region of the stainless steel made more than 215 degrees is wider than that of the ceramic heating member 21 such as zirconia. Therefore, the atomization efficiency is further improved and the mouthfeel becomes better.

  Preferably, the first end A of the sheet-like base member 212 is provided with a sharp end 215 that is advantageous for insertion into the heat stick 3. Since the sharp end 215 can guide the insertion of the heating member 21, the resistance at the time of insertion is reduced.

  In order to satisfy the technical requirements when printing the conductive path 214 on the sheet-like base member 212, the sheet-like base member 212 has a flat surface 2121 located between the retreating parts 211 on two opposite sides of the heating member 21. In addition, a conductive path 214 is formed by printing in the area of the flat surface 2121. The retreating parts 211 are provided outward from two opposing sides in the width direction of the flat surface 2121.

  The insulating layer 213 is formed by coating the surface of the sheet-like base member 212 with a glass paste containing silicon oxide, calcium oxide, and aluminum oxide, and then sintering the substrate at 400 to 1000 ° C. Since the sheet-like base material 212 made of metal or alloy is conductive, the insulating layer 213 can prevent a short circuit between the sheet-like base material 212 and the conductive path 214.

  The insulating layer 213 covers the sheet-like substrate 212 by spraying or printing. The thickness of the insulating layer 213 may be designed based on the pressure resistance requirement between the conductive path 214 and the sheet-shaped base material 212, and the thickness of the insulating layer 213 is usually less than 0.1 mm.

  Preferably, both sides of the sheet-like base material 212 are covered with the insulating layers 213 so that the metal-like sheet-like base material 212 does not oxidize during use at high temperatures. The conductive path 214 is located on the insulating layer 213 on one side. The insulating layer 213 may be provided only on one side of the sheet-like base member 212 to provide the conductive path 214. When the base material of the heating member 21 is a non-metallic or non-conductive material, the insulating layer 213 may be removed.

  The conductive path 214 is used as an electric resistance heater, and is a conductive layer that can be formed on the insulating layer 213 by a method such as physical vapor deposition, electroplating, or printing.

  Preferably, the conductive path 214 includes a heating resistor 2141 and an electrical connection electrically connected to the heating resistor 2141. The heating resistor 2141 and the electrical connection part are arranged along the length direction of the sheet-like base member 212. In addition, the conductive electrode 2142 is connected to an external circuit. Preferably, the electrical connection includes two conductive electrodes 2142 that are electrically connected to the heating resistor 2141.

  The lead wire 22 is connected to the conductive electrode 2142 and has one end extending away from the heating resistor 2141 in the length direction of the heating member 21. That is, the heating resistor 2141 and the conductive electrode 2142 are arranged in a direction from the first end A to the second end B, and the lead wire 22 is drawn out from the second end B.

  The heating resistor 2141 is formed by printing with one of a silver-palladium resistor paste, a ruthenium-palladium resistor paste, a platinum paste, and a nickel-based paste and then sintering. The pattern of the heating resistor 2141 can be flexibly set, and an appropriate resistance value required by the heating member 21 is acquired in consideration of the characteristics of the paste and the thickness of the heating resistor 2141. Generally, the resistance value of the heating member 21 is between 0.3 and 2.0Ω. Typically, the thickness of the heating resistor 2141 is less than 0.1 mm, preferably less than 20 um. The conductive electrode 2142 is formed by printing a silver-based paste having a relatively low resistivity and then sintering it.

  When the lead wire 22 is energized with an external power supply, the heating resistor 2141 is energized to generate heat. The lead wire 22 can be connected to the conductive electrode 2142 by high-temperature brazing under a protective atmosphere at 600 to 1100 ° C. using a silver / copper welding material, a pure silver welding material, or a nickel welding material. The lead wire 22 is connected to the conductive electrode 2142 by soldering with a high-temperature solder paste. The application temperature at this time is higher than 300 ° C.

  Since the sheet-shaped base member 212 made of a metal material has excellent thermal conductivity, a through-hole 2122 is provided in a longitudinal section of the sheet-shaped base member 212 where the conductive electrode 2142 is located in order to prevent heat loss. Since heat can be shut off by the through hole 2122, the heat transmitted to the second end B decreases.

  Since the temperature of the section corresponding to the conductive electrode 2142 is low and sufficient atomization of tobacco leaves is not possible, the chopped tobacco at the location can store and absorb a certain amount of liquid. Therefore, it is possible to prevent or reduce leakage of the liquid from the location.

  A large temperature gradient exists between a section corresponding to the heating resistor 2141 inserted into the tobacco leaf and a section corresponding to the conductive electrode 2142 in the heating member 21. The section corresponding to the conductive electrode 2142 has a relatively low temperature and little heat dissipation, which is advantageous for effective use of energy.

  The heating member 21 further includes an isolation layer 216 covering the outside of the conductive path 214 in order to isolate the heating resistor 2141 from the outside air and further enhance the service life and stability.

  The isolation layer 216 is a glaze layer formed by firing glass glaze, and generally has a thickness of less than 0.1 mm. Both sides of the sheet-like substrate 212 are covered with the isolation layer 216. The glaze layer smoothes the surface of the heating member and reduces the roughness, so that the adhesion of tar and liquid after burning the tobacco leaves is reduced, and cleaning is facilitated. In another embodiment, only the side where the conductive path 214 exists may be covered with the isolation layer 216.

  Preferably, as shown in FIG. 6, the width of the heating member 21 is gradually increased from the first end A to the second end B so that the heating member 21 can be easily inserted into the heat stick 3, and has a treasure sword shape. ing. Since the first end A is narrowed, the resistance at the time of inserting the heating member 21 is reduced by combining the first end A with the reduced thickness structure of the retreating part 211. Therefore, it is easy to insert, and the situation where tobacco leaves concentrate on the side of the heating chip can be effectively reduced. Further, since the bottom of the heating member is widened, it is advantageous for improving the strength of the heating chip, and the breaking of the heating member caused by repeatedly inserting and removing the heat stick is prevented.

  Normally, the included angle formed by the two sides of the acute end 215 facing each other in the width direction is larger than the included angle formed by the two sides of the second end B of the heating member 21 opposed in the width direction. In another embodiment, the heating member 21 may have a triangular shape.

  As shown in FIG. 2, the mounting seat 23 is covered on the second end B of the heating member 21. That is, the heating member 21 is covered at one end on the side from which the lead wire 22 is led out, and is covered at the electrical connection portion. In another embodiment, the mounting seat 23 may be independently mounted on the heating member 21 as an independent member.

  The sharp end 215 is located at one end of the heating member 21 on the side away from the mounting seat 23. The mounting seat 23 and the sharp end 215 are respectively located at opposite ends of the heating member 21. When one end of the heating member 21 on the acute end 215 side is inserted into the smoke tube 1, the mounting seat 23 contacts the outer end of the smoke tube 1, thereby regulating the insertion depth of the heating member 21.

  A through hole 2122 is provided in a section in the length direction of the sheet-like base material 212 where the conductive electrode 2142 is located, and the heat transmitted to the second end B is reduced, so that the temperature of the mounting seat 23 is high. The situation of becoming too much is prevented.

  Since no heating area is provided between the end of the second end B where the mounting seat 23 is located and the conductive electrode 2142, the possibility of generating harmful gas is reduced. In addition, the range of material selection for the mounting seat 23 is further expanded, and the cost is reduced. Usually, the mounting seat is injection molded from a high-molecular polymer, and commonly used materials include polyetheretherketone, high-temperature nylon and the like.

  The above technical features can be used in any combination without limitation.

  The above is only the embodiment of the present invention, and the scope of the present invention is not limited thereby. Modifications of equivalent structures or equivalent flows implemented using the contents of the specification and drawings of the present invention, or direct and indirect operations in other related technical fields, are not limited to the present invention for the same reason. Included in the scope of protection.

Claims (10)

A heating member (21) for a heating-type smoking article,
The heating member (21) is sheet-shaped and includes two opposing first ends (A) and second ends (B),
The first end (A) is provided so as to extend outward from the first end (A) so as to be inserted into the smoke tube (1) of the heating type smoking article from the first end (A). A heating member having a width gradually increasing to the second end (B).   The end of the first end (A) is provided with a sharp end (215) which is advantageous for insertion into a heat stick (3) in the chimney (1). The heating member (21) as described.   The included angle formed by the two sides of the sharp end (215) opposed in the width direction is larger than the included angle of the two sides opposed by the width of the second end (B) of the heating member (21). Heating member (21) according to claim 2, characterized in that it is also large.   On two opposite sides of the width of the heating member (21), retreating parts (211) are provided, each of which gradually reduces the thickness of the heating member (21) toward the edge in the width direction. Heating member (21) according to any of the preceding claims, characterized in that: The heating member (21) has two first sides (C) and second sides (D) opposed in the width direction, and two first sides (E) and second sides (F) opposed in the thickness direction. ),
The retreating part (211) includes a chamfered part provided on an edge of the first side (E) and / or the second side (F) corresponding to the first side (C), and the second side (D). 5. The method according to claim 4, further comprising a chamfer provided on an edge of the first side (E) and / or the second side (F), the chamfer including a bevel or a rounded corner. (21). A chamfered portion is provided at an edge of the first side (C) on the first side (E) and a second side (F), respectively, and the first side (E) of the second side (D) is provided. And the second side (F) are provided with chamfered portions, respectively, and the retreating portions (211) of the first side (C) and the second side (D) are used to control the heating member (21). The first side (C) and the second side (D) have rounded corners or acute angles, or
A chamfer is provided on an edge of the first side (C) on the first side (E) or the second side (F), and the first side (E) or the second side (D) is provided with a chamfer. The chamfered part is provided in the edge of the 2nd side (F), The acute angle side is formed in the said 1st side (C) and the 2nd side (D), The characterized by the above-mentioned. Heating member (21).   The heating member (21) includes a sheet-shaped substrate (212), an insulating layer (213) covering the sheet-shaped substrate (212), and a conductive path (214) provided in the insulating layer (213). The heating member (21) according to claim 4, wherein the conductive path (214) generates heat after energization.   The heating member (21) according to claim 7, wherein the sheet-shaped substrate (212) is made of a metal material or an alloy, and the retracting portion (211) is formed by stamping.   The heating member (21) further includes an isolation layer (216) covering the outside of the conductive path (214), and the isolation layer (216) is a glaze layer formed by firing glass glaze. The heating element (21) according to claim 7, wherein the outer surface of the heating element (21) is covered by the isolation layer (216).   A smoke tube (1) and a heating member (21) according to any of the preceding claims, wherein said heating member (21) is removable from said first end (A) into said smoke tube (1). A heating-type smoking article, which can be inserted into a smoking article.