TWI679386B - Heating device and its heating sheet fixing frame - Google Patents

Abstract

The creation is a fixing frame for fixing a heating plate, which includes a frame, two conductive units, and a plurality of second stoppers. The frame body surrounds to form an internal space for accommodating the heat-generating sheet; two conductive units are arranged on the frame body around the space with elasticity, and push the heat-generating sheet toward the internal space, and are used to conduct the heat-generating sheet to the external power supply; The second stoppers are arranged on the frame body at intervals and protrude toward the inner space, and abut against one side of the heating sheet. In this creation, the heating sheet is electrically connected to an external power supply with two conductive units, so that there is no need to first solder the wires to the heating sheet during assembly, and only the pressing of the heating sheet into the internal space can greatly shorten the assembly. time.

Description

Heating device and its heating sheet fixing frame

The present invention relates to a fixing frame for fixing a heating plate, and a heating device composed of the fixing frame and the heating plate, especially a heating device of a heater or a hair dryer.

The heating device can be used as a source of heat energy for the heater or hair dryer. By setting the heating device in front of the fan, the heater or hair dryer can blow out hot air. The heating device includes a heating plate and a fixing frame; the heating plate includes a plurality of through holes and has a grid shape, which itself can conduct electricity and can convert electrical energy into thermal energy to heat itself; the fixing frame has a frame shape and is used for The heating piece is loaded and erected at a corresponding position on the machine, and a fastener is provided on the fixed frame. The heating piece is set in the frame of the fixed frame and fastened by the fastener.

However, in the prior art heating device, two wires must be welded to the heating sheet during assembly, and then the heating sheet must be installed in a frame-type fixing frame, which makes the heating device labor-intensive and time-consuming in manufacturing; and Due to the tolerance problem, even if there is a fastener on the fixed frame to fasten the heating plate, the heating plate will be detached from the fixing frame because of looseness. Therefore, heat must be applied between the periphery of the heating plate and the fixing frame during assembly. Fixing glue, in this way, will further increase the manufacturing cost. Therefore, in summary, the fixing bracket of the prior art heating plate needs to be improved.

In view of the aforementioned shortcomings and shortcomings of the prior art, the present invention provides a heating device and a heating sheet fixing bracket, which does not need to be welded with wires to the heating sheet during assembly, and does not need to be additionally coated with a heat-resistant fixing adhesive to prevent the heating sheet. Disengage the mounting bracket.

In order to achieve the above-mentioned creative purpose, the technical means used in this creation is to design a heat-generating sheet holder for setting up a heat-generating sheet. The heat-generating sheet includes a first side and a second side opposite to each other. The second surface and the second surface are connected to each other by a ring wall. The heating sheet fixing frame includes a frame which surrounds to form an internal space for receiving the heating sheet. The frame further includes an abutment member, and the abutment member. The top piece projects toward the internal space and is used to push against the ring wall of the heating sheet toward the internal space; two conductive units are arranged on the frame in a surrounding space and protrude toward the internal space, and the two conductive The unit is used to push against the annular wall of the heating sheet toward the internal space, and is used to conduct the heating sheet to an external power supply; the abutting piece and the two conductive units are used to sandwich the heating sheet; a plurality of second The stoppers are arranged on the frame in a surrounding space and protrude toward the internal space, and the second stoppers are used to abut the second surface of the heating sheet.

In order to achieve the above-mentioned creation purpose, the technical means used in this creation is to design a heating device, which includes a heating piece, which includes a plurality of through holes and opposite first and second sides, and the through holes pass through The first surface and the second surface, and the first surface and the second surface are connected to each other by a ring wall; a heating sheet fixing frame for mounting the heating sheet and including a frame body which surrounds to form an interior Space, the heat generating sheet is disposed in the internal space; the frame further includes an abutting member, the abutting member is protruded toward the internal space, and is used to push against the annular wall of the heating sheet toward the internal space; Two conductive units are arranged on the frame in a surrounding space and protrude toward the internal space. The two conductive units push against the annular wall of the heating plate toward the internal space; the heating plate is electrically connected by the two conductive units. To the external power supply; the abutting piece and the two conductive units are used to sandwich the heating sheet; a plurality of second stoppers are arranged on the frame around the space and protrude toward the internal space, and the second The stopper is abutted against the second surface of the heat generating sheet.

The advantage of this creation is that, by providing two conductive units on the heating plate fixing frame, and allowing the heating plate to be electrically connected to the external power supply, the electric wires need not be soldered to the heating plate before assembly. It only needs to press the heating piece into the internal space, which can greatly shorten the assembly time; and the two conductive units push against the heating piece toward the internal space, and then cooperate with the second stopper on the frame to abut against the second of the heating piece. In this way, the heat-generating sheet can be stably set in the internal space of the frame body without being loosened due to shaking due to tolerances.

Further, in the heat generating sheet fixing frame, each of the conductive units is a reed.

Further, in the heat sink fixing frame, two reed grooves are recessed in the frame, and the two conductive units are respectively embedded in the two reed grooves; and one end of each of the conductive units Embedded in the corresponding reed slot, the other end is bent and extended in the internal space and pushed against the annular wall of the heating piece.

Further, in the heating sheet fixing frame, each of the conductive units includes a compression spring and a conductive sheet, one end of the compression spring is provided on the frame body, and the other end is connected to the conductive sheet; One side is connected to the compression spring and the other side is used to abut against the annular wall of the heating sheet.

Further, in the heat-generating sheet fixing frame, the frame body includes two protruding columns, the two protruding columns are arranged at intervals and protrude toward the internal space, and the two compression springs are respectively sleeved on the two protruding columns.

Further, in the heating sheet fixing frame, the ring wall surface of the frame body is recessed with two spring grooves, and the two compression springs of the two conductive units are respectively disposed in the two spring grooves; One end is located in the corresponding spring groove, and the other end protrudes from the ring wall surface of the frame body and is connected to the conductive sheet.

Further, in the heat generating sheet fixing frame, each of the conductive units includes an adjusting member that penetrates the inner and outer wall surfaces of the frame body and is pushed toward the inner space and pushes against the heat generating sheet.

Further, in the heat generating sheet fixing frame, the frame body is formed with two fitting grooves corresponding to the conductive units, and the two fitting grooves penetrate the inner and outer wall surfaces of the frame body; each of the conductive units further includes A conductive sheet is provided in the corresponding two fitting grooves and pushed against the annular wall of the heating sheet toward the internal space, and the adjusting member is abutted against the conductive sheet and faces through the conductive sheet. The internal space is pushed against the heating sheet.

Further, in the heat generating sheet fixing frame, the abutting member has elasticity, and pushes the heat generating sheet toward the internal space with elasticity.

Further, in the heat-fixing sheet fixing frame, the frame body further includes a plurality of bumps, which are arranged around each other and spaced apart and project toward the internal space and are used to abut the ring wall of the heat-generating sheet. ; The distance that each of the bumps protrudes from the frame decreases from the second surface of the heating sheet toward the first surface.

Further, in the heat-generating sheet fixing frame, the frame further includes at least one hook, the at least one hook having elasticity and protruding toward the internal space, and used to hook the first of the heat-generating sheet. surface.

Further, in the heat generating sheet fixing frame, a plurality of stop abutment portions are formed on a side of each of the second stoppers facing the heat generating sheet, and the stop abutment portions are used to abut against the The second side of the heat generating sheet.

Further, the heating sheet fixing frame further includes a plurality of first stoppers, which are arranged on the frame around the space and protrude toward the internal space, and the first stoppers are used to abut On the first surface of the heating sheet.

10‧‧‧ Fever

11‧‧‧through hole

12‧‧‧ the first side

13‧‧‧ second side

14‧‧‧ ring wall

20‧‧‧Heat film holder

21‧‧‧ floor

22‧‧‧ support wall

221‧‧‧Internal space

222‧‧‧ Reed Slot

23‧‧‧ conductive unit

24‧‧‧First stop

25‧‧‧Second stop

26‧‧‧Top piece

27‧‧‧ bump

28‧‧‧ Hook

22A‧‧‧Frame

221A‧‧‧Internal space

222A‧‧‧ convex post

223A‧‧‧Spring slot

23A‧‧‧Conductive unit

231A‧‧‧Compression spring

232A‧‧‧Conductive sheet

22B‧‧‧Frame

221B‧‧‧Internal space

222B‧‧‧Matching groove

23B‧‧‧Conductive unit

231B‧‧‧Conductive sheet

2311B‧‧‧Abutting Department

2312B‧‧‧Mating part

2313B‧‧‧Extension

232B‧‧‧Adjustment

25B‧‧‧Second stop

251B‧‧‧ Stop abutment

26B‧‧‧Available pieces

FIG. 1 is a three-dimensional appearance view of the first embodiment of this creation.

FIG. 2 is an exploded view of the first embodiment of the present invention.

Fig. 3 is a front view of the first embodiment of the present invention.

Fig. 4 is a side cross-sectional view of the present creation taken along the line A-A in Fig. 3.

Fig. 5 is a side cross-sectional view taken along the line B-B in Fig. 3 of the present creation.

FIG. 6 is a perspective external view of a second embodiment of the heat generating sheet fixing frame of the present invention.

FIG. 7 is an exploded view of a second embodiment of the heat generating sheet fixing frame of the present invention.

FIG. 8 is a front view of a third embodiment of the heat generating sheet fixing frame of the present invention.

FIG. 9 is a partially enlarged view of the third embodiment of the heat generating sheet fixing frame of the present invention.

FIG. 10 is an exploded view of a third embodiment of the heat generating sheet holder of the present invention.

In the following, with reference to the drawings and the preferred embodiments of this creation, the technical means adopted by this creation to achieve the intended purpose is further explained.

Please refer to FIG. 1 and FIG. 2. The heating device of the present invention includes a heating plate 10 and a heating plate fixing frame 20.

Please refer to FIG. 2, FIG. 3 and FIG. 4. The heating sheet 10 includes a plurality of through holes 11 and an opposite first surface 12 and a second surface 13. The through holes 11 penetrate the first surface 12 and the second surface 13. Surface 13, and the first surface 12 and the second surface 13 are connected to each other by an annular wall 14; Please refer to FIG. 2, FIG. 3, FIG. 4, and FIG. 5. The heating sheet fixing frame 20 includes a support wall 22, two conductive units 23, a plurality of first stoppers 24, a plurality of second stoppers 25, and an abutment. The top member 26, the plurality of bumps 27 and at least one hook 28.

The frame body in this embodiment further includes a bottom plate 21 and a support wall 22 connected to each other. Specifically, the bottom plate 21 has a through hole in the center, and the support wall 22 protrudes from the periphery of the through hole and faces the bottom plate 21. One side extends, that is to say, in the first embodiment, the support wall 22 is formed in the form of a ring wall on the periphery of the through hole and has a height relative to the bottom plate 21, but is not limited thereto. The support wall 22 is coupled to other devices. The support wall 22 surrounds to form an internal space 221. The aforementioned heating sheet 10 is disposed in the internal space 221. The support wall 22 is also used for other components (the conductive unit 23, the first stopper 24, The second stopper 25, the abutment member 26, the projection 27 and the hook 28) are provided thereon, but there may be no support wall 22, and the heating sheet 10 is directly disposed in the through hole of the bottom plate 21, and these components It is directly arranged on the hole wall of the through hole of the bottom plate 21.

The two conductive units 23 are arranged on the support wall 22 at intervals and protrude toward the internal space 221. The two conductive units 23 are elastic and are used to push against the annular wall 14 of the heating sheet 10 toward the internal space 221 and to conduct the heating sheet. 10 to external power supply, and specifically, in the first embodiment, each conductive unit 23 is a reed, but not limited to this; in addition, the support wall 22 of the frame body is recessed in the first embodiment Two reed slots 222 are formed, and two conductive units 23 in the form of reeds are respectively embedded in the two reed slots 222, and specifically one end of the reed is embedded in the reed slot 222, and the other end It is located outside the reed groove 222 and bends and extends into the inner space 221 and pushes the annular wall 14 of the bottom heating sheet 10, but the manner in which the above-mentioned reed is combined with the support wall 22 is not limited thereto, and it may be a reed It is directly adhered to the support wall 22; and the structure of the conductive unit 23 is not limited to the above. For other structural forms, please refer to the following: Please refer to FIG. 6 and FIG. 7. In the second embodiment, each conductive unit 23A includes There is a compression spring 231A and a conductive piece 232A. One end of the compression spring 231A is provided. Support wall 22A, and the other end connected to the conductive plate 232A; 232A conductive sheet is connected to one side of a compression spring 231A and the other contact surface The supporting wall 22A rests on the annular wall 14A of the heating sheet 10A. In addition, in the second embodiment, the supporting wall 22A includes two protruding posts 222A. The two protruding posts 222A are arranged at intervals and protrude toward the internal space 221A. The two compression springs 231A are respectively sleeved. It is set on the two protruding posts 222A, which can prevent the compression spring 231A from springing off due to deflection due to force, and it is more convenient during assembly. It only needs to be set and not fixed in other ways, but it is not limited to this. There is no protruding post 222A. In addition, in the second embodiment, the ring wall surface of the frame (that is, the side of the support wall 22A facing the internal space 221A) is concavely formed with two spring grooves 223A, and two compression springs 231A are respectively provided in the two spring grooves 223A, and specifically For example, one end of the compression spring 231A is located in the spring groove 223A, and the other end protrudes from the ring wall surface of the frame body and is connected to the conductive piece 232A outside the spring groove 223A. In addition, the groove of the spring groove 223A The opening is smaller than the conductive sheet 232A, but is not limited thereto.

Please refer to FIGS. 8, 9 and 10. In the third embodiment, two fitting grooves 222B are formed on the frame body 22B corresponding to the conductive units 23B, and the two fitting grooves 222B penetrate the inner and outer wall surfaces of the frame body 22B. ; And each conductive unit 23B includes a conductive sheet 231B and an adjusting member 232B. The conductive sheet 231B is disposed in the corresponding two fitting grooves 222B and pushes against the annular wall of the heating sheet toward the internal space 221B. The conductive sheet 231B includes an abutting portion 2311B, two fitting portions 2312B, and two extending portions 2313B. The abutting portion 2311B is located in the internal space 221B of the frame 22B and abuts against the heat generating sheet. Two fitting portions 2312B are respectively formed at both ends of the abutting portion 2311B and are respectively located in two fitting grooves 222B of the frame 22B. The portions 2313B are respectively formed at the ends of the two fitting portions 2312B and are located outside the internal space 221B of the 22B frame; the adjusting member 232B penetrates the inner and outer wall surfaces of the screw-fit frame 22B and pushes the heating piece toward the internal space 221B, specifically, the resisting pieces The abutting portion 2311B leans against the conductive piece 231B and pushes the heating piece toward the internal space 221B through the abutting portion 2311B. The adjusting piece 232B is used to adjust the length of each conductive unit 23B protruding toward the internal space 221B, but the adjusting piece 232B does not It is limited to penetrate the screw frame 22B, and the frame 22B may be penetrated in other ways which can adjust the convex elongation. In addition, the conductive unit 23B may not have the conductive sheet 231B, thereby the frame 22B does not need to be provided with a fitting groove 222B corresponding to each conductive unit 23B. The element 23B can be conductive only by using the adjusting piece 232B directly against the heating piece, that is, the adjusting piece 232B itself is a conductive material and is connected to an external power source.

The foregoing second and third embodiments are other preferred embodiments of the conductive unit 23, and the conductive unit 23 has elasticity in the first and second embodiments. In the third embodiment, the conductive unit 23 is provided by screws. Stable fixing force, but its structure and form are not limited to the above.

Please refer to FIG. 2, FIG. 3, FIG. 4 and FIG. 5. The first stoppers 24 are arranged on the support wall 22 at intervals and protrude toward the internal space 221. A stopper 24 is an elongated sheet body extending in a ring shape, but is not limited thereto. The first stoppers 24 abut against the first surface 12 of the heating sheet 10; Alternatively, the first stopper 24 may not be provided, as shown in the third embodiment in FIG. 10.

The second stoppers 25 are arranged on the support wall 22 at intervals and protrude toward the inner space 221. In this embodiment, each of the second stoppers 25 is an elongated sheet body extending in a ring shape. , But not limited to this; the second stoppers 25 abut against the second surface 13 of the heat generating sheet 10, so that the heat generating sheet 10 can be sandwiched with the first stopper 24 to form a limit position. The effect is to prevent the heat generating sheet 10 from detaching from the support wall 22.

In addition, in the third embodiment, referring to FIG. 8 and FIG. 10, a plurality of stop abutment portions 251B are formed on a side of each of the second stoppers 25B facing the heat generating sheet, and such stop abutment portions It is used to abut the second surface of the heat-generating sheet, thereby avoiding the large area of the second stopper 25B coming into contact with the heat-generating sheet to cause melting, but it is not limited thereto, and there may be no stop-abutting part 251B. .

The abutment member 26 projects toward the internal space 221 and pushes against the annular wall 14 of the heating sheet 10 toward the internal space 221. The abutment member 26 and the two conductive units 23 are used to sandwich the heating sheet 10, specifically, two conductive members. The unit 23 is located on one side of the centerline of the heat generating sheet 10 and the abutment member 26 is on the other side, so that the force of the three pushing the ring wall 14 of the heat generating sheet 10 reaches a balance, so that the heat generating sheet 10 is on the supporting wall. The inner space of 22 is centered, but it is not limited to this, there may be no abutment piece 26, so it can be two conductive units 23 The heating sheet 10 is sandwiched between two sides of the heating sheet 10. In addition, in the first and second embodiments, please refer to FIG. 2 and correspondingly refer to FIG. 6. In the two embodiments, the abutment member 26 is an elastic sheet body and faces on the frame body 22. The inner space 221 extends to push the bottom to fix the heating sheet 10 with elastic force, but is not limited to this; for example, in the third embodiment, please refer to FIG. 8, the abutting member 26B is a screw threaded through The frame 22B can adjust the protruding distance of the abutting member 26B toward the internal space 221B and provide a stable supporting force to firmly fix the heating piece; the structure of the abutting member 26 is not limited thereto.

The projections 27 are spaced from each other and project toward the inner space 221 and are used to abut against the annular wall 14 of the heating sheet 10; and the distances of each projection 27 protruding from the support wall 22 are directed from the second surface 13 of the heating sheet 10 The direction of the first surface 12 decreases, but is not limited to this. The structure with decreasing projection distance is used to facilitate the installation of the heating sheet 10, and each of the bumps 27 can maintain the same projection distance. In addition, the bump 27 is The ring wall 14 used to prevent the heating sheet 10 from abutting against the support wall 22 to prevent the support wall 22 from melting due to long-term contact in a large area, but it is not limited to this, and the bump 27 may not be provided.

The hook 28 has elasticity and protrudes toward the internal space 221, and is used for hooking the first surface 12 of the heating sheet 10. Specifically, the hook 28 has an inclined surface, and the heating sheet 10 can be abutted when the heating sheet 10 is assembled. On the inclined surface and using the elasticity of the hook 28 to push it away to press the heating sheet 10 into the inner space 221 of the support wall 22 smoothly, but not limited to this, the hook 28 itself may be pivotally provided on the support wall 22, when it is assembled, it is pulled open until the heating plate 10 is positioned; then, in the first embodiment, two hooks 28 and one of the first stoppers 24 are located on the heating plate 10, respectively. On both sides of the center line, the heat-generating sheet 10 is fixed firmly, but not limited to this, the two hooks 28 may be located on both sides, or there may be no hooks 28.

In this creation, the heat generating sheet 10 can be electrically connected to the external power supply by the two conductive units 23, so that there is no need to first solder the wires to the heat generating sheet during assembly, and only the heat generating sheet 10 needs to be pressed into the internal space 221. Can greatly shorten the assembly time; and the two conductive units 23 series have a spring And push the heating sheet 10 toward the internal space 221, and then cooperate with the first stopper 23 and the second stopper 24 on the frame body to abut the first surface 12 and the second surface 13 of the heating sheet, respectively. The heat generating sheet 10 can be stably disposed in the inner space 221 of the support wall 22.

The above description is only the preferred embodiment of the creation, and does not limit the creation in any form. Although the creation has been disclosed as above with the preferred embodiment, it is not intended to limit the creation. Generally, a knowledgeable person can use the technical content disclosed above to make some changes or modifications to equivalent equivalent embodiments without departing from the scope of the technical solution of the creation. Any content that does not depart from the technical solution of the creation according to this The technical essence of the creation Any simple modifications, equivalent changes, and modifications made to the above embodiments still fall within the scope of this creative technical solution.

Claims (14)

A heating sheet fixing frame for mounting a heating sheet, the heating sheet includes a first surface and a second surface opposite to each other, the first surface and the second surface are connected to each other by a ring wall, and the heating plate is fixed The frame includes a frame, which surrounds to form an internal space for receiving the heating sheet; the frame further includes an abutment member, which protrudes toward the internal space, and is used to face the internal space. The conductive wall is pushed against the ring wall of the heating plate; two conductive units are arranged on the frame in a surrounding space and protrude toward the internal space; the two conductive units are used to push against the ring of the heating plate toward the internal space; Wall, and is used to conduct the heating sheet to external power supply; the abutting member and the two conductive units are used to sandwich the heating sheet; a plurality of second stoppers are arranged on the frame and spaced around the enclosure; The inner space is convex, and the second stoppers are used to abut against the second surface of the heating sheet. The heating sheet fixing frame according to claim 1, wherein each of the conductive units is a reed. The heating sheet fixing frame according to claim 2, wherein two reed slots are recessed in the frame, and the two conductive units are respectively embedded in the two reed slots; and one end of each conductive unit Embedded in the corresponding reed slot, the other end is bent and extended in the internal space and pushed against the annular wall of the heating piece. The heating sheet fixing frame according to claim 1, wherein each of the conductive units includes a compression spring and a conductive sheet, one end of the compression spring is provided on the frame, and the other end is connected to the conductive sheet; One side is connected to the compression spring and the other side is used to abut against the annular wall of the heating sheet. The heating sheet fixing frame according to claim 4, wherein the frame body includes two protruding columns, the two protruding columns are arranged at intervals and protrude toward the internal space, and the two compression springs are respectively sleeved on the two protruding columns. The heating sheet fixing frame according to claim 4, wherein the ring wall surface of the frame body is concavely formed with two spring grooves, and the two compression springs of the two conductive units are respectively disposed in the two spring grooves; One end is located in the corresponding spring groove, and the other end protrudes from the ring wall surface of the frame body and is connected to the conductive sheet. The heat generating sheet fixing frame according to claim 1, wherein each of the conductive units includes an adjusting member that penetrates the inner and outer wall surfaces of the frame body and is pushed toward the inner space to the heat generating sheet. The heating sheet fixing frame according to claim 7, wherein the frame body is formed with two fitting grooves corresponding to each of the conductive units, and the two fitting grooves penetrate the inner and outer wall surfaces of the frame body; each of the conductive units further includes A conductive sheet is provided in the corresponding two fitting grooves and pushed against the annular wall of the heating sheet toward the internal space, and the adjusting member is abutted against the conductive sheet and faces through the conductive sheet. The internal space is pushed against the heating sheet. The heating sheet fixing frame according to any one of claims 1 to 8, wherein the abutting member has elasticity, and pushes the heating sheet toward the internal space with elasticity. The heating sheet fixing frame according to any one of claims 1 to 8, wherein the frame body further includes a plurality of projections, which are arranged around each other and spaced apart and project toward the internal space and are used to abut against the The ring wall of the heat generating sheet; the distance that each of the bumps protrudes from the frame decreases from the second surface of the heat generating sheet toward the first surface. The heating sheet fixing frame according to any one of claims 1 to 8, wherein the frame further includes at least one hook, the at least one hook has elasticity and protrudes toward the internal space, and is used for setting the The first side of the heating sheet. The heat generating sheet fixing frame according to any one of claims 1 to 8, wherein a plurality of stop abutment portions are formed on a side of each of the second stoppers facing the heat generating sheet, and the stop abutment portions It is used to abut the second surface of the heating sheet. The heating sheet fixing frame according to any one of claims 1 to 8, further comprising a plurality of first stoppers, which are arranged on the frame in a surrounding interval and protrude toward the internal space. The blocking member is used to abut against the first surface of the heating sheet. A heating device includes a heating sheet including a plurality of through holes and a first surface and a second surface opposite to each other, the through holes penetrating the first surface and the second surface, and the first surface and The second surface is connected to each other by an annular wall; a heating sheet fixing frame for mounting the heating sheet and including a frame, which surrounds to form an internal space, and the heating sheet is disposed in the internal space; the frame is further It includes an abutment piece, the abutment piece protrudes toward the internal space and is used to push against the annular wall of the heating sheet toward the internal space; two conductive units are arranged on the frame and spaced apart from each other around the space. The internal space protrudes, and the two conductive units push against the annular wall of the heating plate toward the internal space; the heating plate is electrically connected to an external power supply through the two conductive units; the abutting piece and the two conductive units are used for The heat generating sheet is sandwiched; a plurality of second stoppers are arranged on the frame in a surrounding space and protrude toward the internal space, and the second stoppers abut against the second surface of the heat generating sheet.