JP2020048553A - Heating type smoking tool - Google Patents

Abstract

To provide an improved heating type smoking tool capable of reducing a pressure to a tobacco leaf by a heating member when inserting the heating member, and improving atomization efficiency of the tobacco leaf.SOLUTION: A heating member 21 of a heating type smoking tool comprises two first sides and second sides facing each other in a width direction, the first side and the second side comprise respectively, a retreat part for gradually reducing a thickness of the heating member 21 as advancing to a side edge in a width direction and a center line of the heating member 21 is provided on a center of a flue 1, and the two sides facing in the width direction has an equal distance to an inner wall face of the flue 1. Both sides of the heating member 21 are reduced in a thickness gradually, so that, when inserting the heating member 21 into a heat stick 3, a pressure to a tobacco leaf from both sides of the heating member 21 can be reduced. The retreat part may be gently shifted so as to suppress adhesion of the tobacco leaf to a side end face of the heating member 21.SELECTED DRAWING: Figure 1

Description

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

  When a flat heating tip is inserted into a cylindrical smoke tube of a heating-type smoking device, the pressure on the tobacco leaves differs between the central region and both sides of the heating tip, and the tobacco leaves on both sides are pressed by a large force. As a result, both sides of the heating chip come into closer contact with tobacco leaves, and soot tends to remain.

  The technical problem to be solved by the present invention is to provide an improved heated smoking device.

  The present invention uses the following technical solutions to solve the technical problems. That is, it includes a tubular smoke tube and a sheet-like heating member detachably inserted into the smoke tube, wherein the heating member includes two first sides and second sides opposed in the width direction, The first side and the second side are provided with retreating parts for gradually decreasing the thickness of the heating member toward the edge in the width direction, respectively, and the center line of the heating member is located at the center of the smoke tube. The two sides which are located and which oppose each other in the width direction of the heating member constitute a heating type smoking article in which the distance to the inner wall surface of the smoke tube is equal.

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

  Preferably, the chamfered portions are respectively provided on two sides facing each other in the width direction on the first side and the second side, and the retreating portions on the first side and the second side allow the heating member to be heated. A rounded side or an acute side is formed on the first side and the second side.

  Preferably, a chamfer is provided on an edge of the first side on the first side or the second side, and a chamfer is provided on an edge of the second side on the first side or the second side. The first side and the second side have acute angles.

  Preferably, one end of the heating member is provided with a sharp end which is advantageous for insertion into a heat stick.

  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 or an alloy, and the retreating portion is formed by stamping.

  Preferably, the sheet-shaped substrate includes a flat surface located between the retreating portions on two opposite sides of the heating member 21, and the conductive path is formed by printing in a region of the flat surface. .

  Preferably, the heating member further includes an isolation layer covering the outside of the conductive path.

  Preferably, the isolation layer is a glaze layer formed by firing glass glaze, and an outer surface of the heating member is covered with the isolation layer.

  By implementing the heating type smoking article of the present invention, the following beneficial effects can be obtained. That is, since both sides of the heating member are gradually reduced in thickness, the pressure from both sides of the heating member to the tobacco leaves can be reduced when the heating member is inserted into the heat stick. Therefore, the tobacco leaves on both sides corresponding to the retreating portion 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 may be gently shifted so that the tobacco leaves do not adhere to the side end surface of the heating member 21.

  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 21 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 member 21 can be effectively reduced. Further, since the bottom of the heating member is widened, it is advantageous for improving the strength of the heating member 21, 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 cylinder-shaped smoke tube (1), and a sheet-shaped heating member (21) removably inserted into the smoke tube (1);
The heating member (21) includes two first sides (C) and a second side (D) facing each other in the width direction, and the first side (C) and the second side (D) include the heating side. Evacuation portions (211) are provided, each of which gradually reduces the thickness of the 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 of the heating member (21) facing each other in the width direction have a distance to the inner wall surface of the smoke tube (1). A heated smoking article characterized by being equivalent. 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 an edge of the first side (E) and / or the second side (F) corresponding to the first side (C), and the second side (D). 2. The method according to claim 1, further comprising a chamfered portion provided on an edge of the first side (E) and / or the second side (F) corresponding to the edge portion, wherein the chamfered portion includes a bevel or a rounded corner. A heating-type smoking article according to claim 1.   The chamfered portions are provided on two sides facing each other in the width direction of the first side (E) and the second side (F), respectively, and the first side (C) and the second side (D) are provided. The rounded side or the acute side is formed on the first side (C) and the second side (D) of the heating member (21) by the retreating part (211). A heated smoking article as described.   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. Heated smoking gear.   The heated smoking article according to claim 1, characterized in that one end of the heating member (21) is provided with a sharp end (215) which is advantageous for insertion into a heat stick (3).   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-type smoking article according to any one of claims 1 to 5, wherein the conductive path (214) generates heat after energization.   The heating type smoking article according to claim 4, wherein the sheet-like substrate (212) is made of a metal or an alloy, and the retracting portion (211) is formed by stamping.   The sheet-like substrate (212) includes a flat surface (2121) located between the retreating parts (211) on two opposite sides of the heating member (21), and the conductive path (214) includes The smoking device according to claim 6, characterized in that it is formed by printing in the area of the flat surface (2121).   The heated smoking article of claim 6, wherein the heating member (21) further comprises an isolation layer (216) covering the outside of the conductive path (214).   10. The isolation layer (216) is a glaze layer formed by firing glass glaze, and an outer surface of the heating member (21) is covered with the isolation layer (216). A heating-type smoking article according to claim 1.