WO2024012500A1

WO2024012500A1 - Electric heating assembly of heating film, heating film, and electronic thermal moxibustion instrument

Info

Publication number: WO2024012500A1
Application number: PCT/CN2023/107071
Authority: WO
Inventors: 肖丁齐
Original assignee: 深圳申美也安投资合伙企业(有限合伙)
Priority date: 2022-07-13
Filing date: 2023-07-12
Publication date: 2024-01-18
Also published as: CN218041808U

Abstract

Disclosed in the embodiments of the present application are an electric heating assembly of a heating film, which assembly comprises a flexible electric heating film, and first electrodes and second electrodes which are arranged in pairs, wherein the flexible electric heating film comprises a plurality of spiral electric heating areas, each spiral electric heating area comprises first arm areas and second arm areas which are arranged in pairs, both the first arm areas and the second arm areas extend from the center of the flexible electric heating film along a planar spiral line, the spiral directions of the first arm areas and the second arm areas are the same and have a difference of 180 degrees in a circumferential direction, and inner ends of the first arm areas are connected to inner ends of the second arm areas; the plurality of spiral electric heating areas are filled to form a circular or quasi-circular electric heating area; and each pair of first electrodes and second electrodes are respectively connected to two opposite side edges of the corresponding spiral electric heating area. By means of the electric heating assembly provided by the present application, the proportion of an effective heating area in the electric heating area formed by means of filling is high, the temperature rises quickly when the power is on, and the temperature at all positions is uniform, thereby achieving a good thermal moxibustion effect.

Description

Heating film electric heating components, heating film and electronic thermal moxibustion instrument

Technical field

The present application relates to the technical field of flexible electric heating film heating, and in particular to an electric heating component of a heating film, a heating film and an electronic thermal moxibustion instrument.

Background technique

The electronic thermal moxibustion instrument is a device that uses electronic heating to perform thermal moxibustion therapy on human acupuncture points. During use, the heating part of the electronic thermal moxibustion instrument, that is, the moxibustion head, needs to be placed close to the acupoints on the human body. Therefore, if the fit is not high, the effect of thermal moxibustion therapy will be poor. In order to improve the fit, existing technical solutions usually adopt the method of reducing the fitting area of the moxibustion head; and in order to reduce the size in the direction perpendicular to the human skin, an electric heating film is used for heating.

In order to match the acupuncture points of hot moxibustion, the fitting surface of the moxibustion head is usually round or nearly round, and in order to heat the fitting surface, the existing technology usually uses a simple bent resistance wire as the heating element, but this Although this method can roughly form a circular heating area, it is prone to uneven heating, that is, the temperature in some areas is too high, causing the corresponding acupuncture points to feel overheated, thereby reducing the user experience.

Chinese patent document CN109646811A discloses a graphene infrared moxibustion therapy device and its use method, in which a graphene heating film is used as a heating element, but its electrodes are simply coiled on the graphene heating film, so the effective heating area is The proportion is small, so that it takes more heat diffusion time to heat the global to the target temperature without ensuring that the local temperature is not too high.

Utility model content

The main purpose of this application is to propose an electric heating component of a heating film, a heating film and an electronic thermal moxibustion device, aiming to solve the problem of the existing electric heating components of the heating film, while ensuring that local temperatures are not too high. Technical issues that take too long to reach the target temperature, leading to poor user experience.

In order to achieve the above purpose, the electric heating component of the heating film proposed in this application includes a flexible electric heating film and and a first electrode and a second electrode arranged in pairs;

The flexible electric heating film includes several spiral electric heating areas. Each of the spiral electric heating areas includes a first arm area and a second arm area arranged in pairs. The first arm area and the second arm area are formed from the flexible electric heating film. The center of the electric heating film extends along a plane spiral. The spiral directions of the first arm area and the second arm area are the same and 180 degrees different in the circumferential direction. The inner end of the first arm area and the inner end of the second arm area Connected; a plurality of the spiral electric heating areas are filled to form a circular or quasi-circular electric heating area;

Each pair of first electrodes and second electrodes is provided corresponding to one of the spiral electric heating areas, and each pair of first electrodes and second electrodes are respectively connected to two opposite sides of the corresponding spiral electric heating area.

Preferably, the flexible electric heating film is provided with a pair of first zoning grooves and a second zoning groove, and the first zoning grooves and the second zoning grooves are formed along a plane spiral from the center of the flexible electric heating film. Extending, the spiral directions of the first and second division grooves are the same and differ by 180 degrees in the circumferential direction;

The inner end of the first zoning groove is separated from the inner end of the second zoning groove, and the outer end of the first zoning groove and the outer end of the second zoning groove both run through the The outer edge of the flexible electric heating film;

The outer edge of the flexible electric heating film extends spirally along the adjacent first and second division grooves, and the outer edge of the flexible electric heating film is in contact with the first and second division grooves. forming a spiral electric heating area;

The first electrode and the second electrode are respectively connected to two outer ends of the spiral electric heating area.

Preferably, a pair of first shunt grooves and a second shunt groove are provided in the middle of the spiral electric heating area. The first shunt groove extends along the first dividing groove, and the first shunt groove extends from the first shunt groove to the second shunt groove. The distance between the inner end of the dividing groove is equal to the distance from the first dividing groove to the first dividing groove;

The second branching groove extends along the second dividing groove, and the distance from the second dividing groove to the inner end of the first dividing groove is equal to the distance from the second dividing groove to the second dividing groove. .

Preferably, the electric heating component of the heating film further includes a flexible substrate that is mutually bonded with the flexible electric heating film, and the first electrode and the second electrode are fixedly laid on the flexible substrate;

Both the first electrode and the second electrode include a radially extending portion and a bending portion, wherein,

The radially extending portion extends radially outward from the middle portion of the flexible substrate, the radial extending portion is isolated from the flexible electric heating film by the flexible substrate, and the inner end of the radially extending portion Exposed on the side of the flexible substrate facing away from the flexible electric heating film;

The bending portion extends from the outer end of the radially extending portion along the outer edge of the outer end of the spiral electric heating area. Extending, the bending portion is exposed on a side of the flexible substrate facing the flexible electric heating film, and the bending portion is electrically adhered to the spiral electric heating area.

Preferably, the flexible electric heating film is provided with a pair of first zoning grooves and a second zoning groove, the first zoning grooves and the second zoning grooves are arranged symmetrically about the center of the flexible electric heating film, and the third zoning grooves are arranged symmetrically about the center of the flexible electric heating film. The spiral electric heating area is formed between the edge of the first division groove and the second division groove close to the center;

The edges of the first zoning groove and the second zoning groove away from the center are arc-shaped, and the edges of the first zoning groove and the second zoning groove away from the center are in contact with the flexible electric heater. An annular electric heating area is formed between the outer edges of the film; the inner edge of the annular electric heating area is connected to both outer ends of the spiral electric heating area;

The first electrode and the second electrode are respectively connected at the combined positions of the two outer ends of the spiral electric heating area and the annular electric heating area.

Preferably, the spiral electric heating area is provided with a central shunt groove extending along the midline of its width direction, and the outer end of the central shunt groove is spaced apart from the inner edge of the annular electric heating area.

Preferably, the flexible electric heating film is a continuous sheet on the inside;

The first electrode and the second electrode both extend along a plane spiral from the center of the flexible electric heating film. The spiral direction of the first electrode is the same as the spiral direction of the second electrode and differs by 180 degrees in the circumferential direction. A spacing of uniform width is formed between the first electrode and the second electrode;

The flexible electric heating film covers the distance between the first electrode and the second electrode, and the flexible electric heating film is electrically connected to both the first electrode and the second electrode; the spiral electric heating area is formed on the first electrode. between one electrode and the second electrode.

Preferably, the flexible electric heating film is provided with multiple pieces, and the electric heating component of the heating film further includes a plurality of flexible substrates corresponding to the plurality of flexible electric heating films, and the plurality of flexible electric heating films are connected to a plurality of flexible electric heating films. The flexible substrates are alternately attached one to one;

A pair of first electrodes and second electrodes are fixedly laid on each flexible substrate, and each pair of first electrodes and second electrodes are exposed on the corresponding side of the flexible electric heating film facing the corresponding side of the flexible substrate. On one side; in the projection along the thickness direction, each of the first electrodes is staggered in the circumferential direction, and each of the second electrodes is staggered in the circumferential direction.

Preferably, the outer ends of the first electrode and the second electrode are provided with wiring rings, and the flexible substrate is provided with via holes corresponding to the inner holes of the wiring rings located on each layer.

Preferably, it also includes a flexible substrate that is mutually bonded with the flexible electrothermal film. The flexible substrate is provided with a plurality of pairs of first electrodes and second electrodes, and each pair of first electrodes and second electrodes is exposed. Place On the side of the flexible substrate facing the flexible electric heating film, each of the first electrodes is staggered in the circumferential direction, and each of the second electrodes is staggered in the circumferential direction.

This application also proposes a heating film, which includes a cover body, an inner lining sheet, an electrical connector and an electric heating component of the heating film as described above. The cover body is made of flexible material, and the middle part of the cover body is provided with An installation groove, the lining sheet is provided on the inside of the cover body, the electrical connector is fixedly installed in the installation groove, and the electric heating component is provided between the lining sheet and the cover body, The first electrode and the second electrode are electrically connected to the positive terminal and the negative terminal of the electrical connector respectively.

Preferably, the electric heating component is an electric heating component provided with a heating film with multiple pairs of first electrodes and second electrodes as described above. The heating film also includes a temperature sensor and a programmable current limiting switch, wherein,

The two connection ends of the temperature sensor are electrically connected to the two signal terminals of the electrical connector respectively;

The programmable current-limiting switch has a power interface and a plurality of current-limiting interfaces. The power-connecting interface of the programmable current-limiting switch is electrically connected to the power connector. The plurality of limiting interfaces of the programmable current-limiting switch The flow interface is electrically connected to a plurality of first electrodes and/or a plurality of second electrodes respectively.

This application also proposes an electronic thermal moxibustion instrument, which includes a host machine and a heating film as described above. The host machine is provided with a power supply connector that is detachably and electrically connected to the power connector.

Preferably, the electrical connection terminals of the power connector are all pins, and the power supply connector is provided with a jack adapted to the electrical connection terminals of the power connector.

Preferably, the cover body includes a cover plate and a boss provided in the middle of the cover plate. The boss is provided on a side of the cover plate away from the electric heating component. Pinholes corresponding to the electrical connection terminals of the electrical connector;

The top surface of the boss is provided with a limiting cylinder surrounding each of the pinholes, and the top surface of the boss is provided with a limiting groove on the periphery of the limiting cylinder; the electrical connection The electrical connection terminal of the device is located in the inner cavity of the limiting cylinder; the host also includes a shell, and the shell is provided with a limiting circular groove that is adapted to be plugged into the limiting cylinder, and is connected to the limiting cylinder. The limit protrusion adapted to the limit groove; or,

The top surface of the boss is provided with a plurality of limiting grooves; the main machine includes a housing, and the housing is provided with limiting protrusions adapted to the limiting grooves.

Preferably, the heating film further includes an annular first magnetic piece. The inner side of the cover is provided with an annular groove around the periphery of the installation groove. The first magnetic piece is fixedly embedded in the annular groove. slot; the host also includes a second magnetic piece that magnetically cooperates with the first magnetic piece.

Preferably, the cover body includes a cover plate and a clip edge bent inward from the edge of the cover plate, and the The electric heating component is located between the cover plate and the lining sheet, the clamping edge is located on a side of the lining sheet away from the electric heating component, and the clamping edge and the lining sheet are separable; When the clamping edge is separated from the lining sheet, a clamping space is formed between the clamping edge and the lining sheet.

The electric heating area of the electric heating component of the utility model is a roughly centrally symmetrical spiral electric heating area. The first arm area and the second arm area have a phase angle difference of 180 degrees. They are arranged parallel to each other in each sector area. There is no heat generation between the two in the radial direction. The area is smaller, so the effective heating area accounts for a higher proportion in the electric heating area formed by filling a circle or a quasi-circle, so the temperature rises quickly when the electricity is turned on, and the temperature is uniform everywhere, which can improve the effect of thermal moxibustion.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic top view of the electric heating component of the heating film according to the first embodiment of the present invention;

Figure 2 is a schematic diagram of the exploded structure of the electric heating component in Figure 1;

Figure 3 is a schematic structural diagram of the electric heating component in Figure 1, viewed from above;

Figure 4 is a schematic diagram of the exploded structure of the electric heating component in Figure 1 from another angle;

Figure 5 is a schematic top structural view of the electric heating component in Figure 1, in which dotted lines are used to express hidden components;

Figure 6 is a schematic top view of the electric heating component of the heating film according to the second embodiment of the present invention;

Figure 7 is a schematic structural diagram of the electric heating component in Figure 6, viewed from above;

Figure 8 is a schematic diagram of the exploded structure of the electric heating component in Figure 6;

Figure 9 is a schematic diagram of the front three-dimensional structure of the electric heating component of the heating film according to the third embodiment of the present invention;

Figure 10 is a schematic three-dimensional structural diagram of the back side of the electric heating component in Figure 9;

Figure 11 is a schematic diagram of the exploded structure of the electric heating component in Figure 9;

Figure 12 is a schematic structural diagram of the electric heating component in Figure 9 from below, in which dotted lines are used to express hidden components;

Figure 13 is a schematic three-dimensional structural view of the front of the electric heating component of the heating film of the present utility model according to the fourth embodiment;

Figure 14 is a schematic diagram of the exploded structure of the electric heating component in Figure 13;

Figure 15 is a schematic three-dimensional structural diagram of the back side of the electric heating component in Figure 13;

Figure 16 is a schematic diagram of the exploded structure of the electric heating component in Figure 13 from another angle;

Figure 17 is a top structural schematic diagram of the electric heating assembly in Figure 13, in which dotted lines are used to express hidden components;

Figure 18 is a schematic three-dimensional structural diagram of the front of the electric heating component of the heating film according to the fifth embodiment of the present invention;

Figure 19 is a schematic three-dimensional structural diagram of the back side of the electric heating component in Figure 18;

Figure 20 is a schematic diagram of the exploded structure of the electric heating component in Figure 18;

Figure 21 is a top structural schematic diagram of the electric heating assembly in Figure 18, in which dotted lines are used to express hidden components;

Figure 22 is a schematic three-dimensional structural diagram of the first embodiment of the heating film of the present invention, in which the first embodiment of the electric heating component using the heating film of the present invention is applied;

Figure 23 is a schematic diagram of the explosion structure of the heating film in Figure 22;

Figure 24 is a schematic three-dimensional structural diagram of the second embodiment of the heating film of the present invention, in which the fourth embodiment of the electric heating component using the heating film of the present invention is applied;

Figure 25 is a schematic diagram of the explosion structure of the heating film in Figure 24;

Figure 26 is a schematic diagram of the explosion structure of the heating film in Figure 24 from another angle;

Figure 27 is a schematic top view of the structure of the heating film in Figure 24;

Figure 28 is a schematic cross-sectional structural diagram along line XXVIII-XXVIII in Figure 27;

Figure 29 is a partial enlarged structural diagram of position A in Figure 28;

Figure 30 is a schematic top view of the partial structure of the third embodiment of the heating film of the present invention, in which the fifth embodiment of the electric heating component using the heating film of the present invention is used;

Figure 31 is a schematic cross-sectional structural diagram along line XXXI-XXXI in Figure 30;

Figure 32 is a schematic diagram of the explosion structure of the heating film in Figure 30;

Figure 33 is a schematic diagram of the explosion structure of the heating film in Figure 30 from another angle;

Figure 34 is a schematic exploded structural diagram of an embodiment of the electronic thermal moxibustion instrument of the present invention, in which the first embodiment of the heating film of the present utility model is applied;

Figure 35 is a schematic diagram of the explosion structure of the electronic thermal moxibustion instrument in Figure 34 from another angle;

Figure 36 is a schematic side view of the structure of the electronic thermal moxibustion instrument in Figure 34 after the host computer and the heating film cooperate with each other;

Figure 37 is a schematic side view of the cross-sectional structure of the electronic thermal moxibustion instrument in Figure 34 after the main body and the heating film cooperate with each other.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

Referring to FIGS. 1 to 21 , for example, FIGS. 5 , 7 , 12 , 17 and 21 , in the first to fifth embodiments of the heating film electric heating components proposed in this application, the heating film electric heating components 30 a and 30 b , 30c, 30d, and 30e include flexible electric heating films 31, 40, 50, 55, and first electrodes 35, 44, 52 and second electrodes 36, 45, 53 arranged in pairs;

The flexible electric heating film 31, 40, 50, 55 includes several spiral electric heating areas 32, 41, 51, 56. Each spiral electric heating area 32, 41, 51, 56 includes a pair of first arm areas 321, 411, 511. And the second arm areas 322, 412, 512, the first arm areas 321, 411, 511 and the second arm areas 322, 412, 512 all extend from the center of the flexible electric heating film 31, 40, 50, 55 along the plane spiral line, The first arm areas 321, 411, 511 and the second arm areas 322, 412, 512 have the same spiral direction and are 180 degrees different in the circumferential direction. The inner ends of the first arm areas 321, 411, 511 and the second arm areas 322, 412, The inner ends of 512 are connected; several spiral electric heating areas 32, 41, 51, 56 are filled to form a circular or quasi-circular electric heating area;

Each pair of first electrodes 35, 44, 52 and second electrodes 36, 45, 53 is arranged corresponding to a spiral electrothermal area 32, 41, 51, 56. , 53 are respectively connected to the two opposite sides of the corresponding spiral electric heating areas 32, 41, 51, 56.

In this embodiment, the flexible electric heating films 31, 40, 50, 55 can be bent, so when applied to the thermal moxibustion instrument, they can better adapt to uneven skin surfaces. In addition to being used in electronic thermal moxibustion instruments, the electric heating components 30a, 30b, 30c, 30d, and 30e of this utility model can also be used in kettles, aroma diffusers, heating hats, heating clothes, heating gloves, seat cushions, etc. The spiral electric heating film can be defined by the vacancies of the flexible electric heating film 31, 40, 50, 55 itself, or the vacancies combined with electrodes (such as the first electrodes 35, 44, 52 and the second electrodes 36, 45, 53). The specific materials of the flexible electric heating films 31, 40, 50 and 55 can be carbon nanofilms, graphene heating films, etc. The first electrodes 35, 44, 52 and the second electrodes 36, 45, 53 are made of materials with low resistivity, such as copper foil or silver foil. When connecting to direct current, the first electrode 35, One of 44, 52 and the second electrode 36, 45, 53 is connected to the positive electrode, and the other is connected to the negative electrode.

The electric heating areas of the electric heating components 30a, 30b, 30c, 30d, and 30e of the present utility model are generally centrally symmetrical spiral electric heating areas 32, 41, 51, 56, the first arm areas 321, 411, 511 and the second arm areas 322, 412. , 512 phase angles differ by 180 degrees, and are arranged parallel to each other in each fan-shaped area. The non-heating area between the two in the radial direction is smaller, so that the proportion of effective heating area in the electric heating area formed by filling a circle or a quasi-circle is larger. High, so the temperature rises quickly when electricity is turned on, and the temperature is uniform everywhere, which can improve the effect of thermal moxibustion.

Further, referring to FIGS. 1 to 5 , in the first embodiment of the electric heating component, a pair of first and second division grooves 33 and 34 are provided on the flexible electric heating film 31 . The two division grooves 34 both extend from the center of the flexible electric heating film 31 along a plane spiral. The spiral directions of the first division groove 33 and the second division groove 34 are the same and differ by 180 degrees in the circumferential direction;

The inner end of the first zoning groove 33 is spaced apart from the inner end of the second zoning groove 34 . The outer end of the first zoning groove 33 and the outer end of the second zoning groove 34 both penetrate the outer surface of the flexible electric heating film 31 . edge;

The outer edge of the flexible electric heating film 31 extends spirally along the adjacent first and second division grooves 33 and 34 , and is formed between the outer edge of the flexible electric heating film 31 and the first and second division grooves 33 and 34 . A spiral electric heating area 32;

The first electrode 35 and the second electrode 36 are respectively connected to the two outer ends of the spiral electric heating area 32 .

In this embodiment, the spiral electric heating film is obtained by cutting the flexible electric heating film 31 itself. In this way, on the one hand, the overall material consumption of the flexible electric heating film 31 is less, and the remaining material obtained by cutting can be recycled. On the other hand, the first electrode 35 and the second electrode 36 only need to be connected to the outer ends of the spiral electric heating area 32, so that the materials used for the first electrode 35 and the second electrode 36 can also be saved.

Further, a pair of first shunt grooves 323 and second shunt grooves 324 are provided in the middle of the spiral electric heating area 32. The first shunt grooves 323 extend along the first division groove 33, and the first shunt groove 323 to the second division groove 34 The distance between the inner ends is equal to the distance from the first diverting groove 323 to the first dividing groove 33;

The second branching groove 324 extends along the second dividing groove 34 , and the distance from the second dividing groove 324 to the inner end of the first dividing groove 33 is equal to the distance from the second dividing groove 324 to the second dividing groove 34 .

In this embodiment, since the path of the current has a tendency of minimizing resistivity, that is, the current only flows through the path with the smallest resistivity. The local width of the portion where the inner end of the first arm region 321 is connected to the inner end of the second arm region 322 may be larger than the width of the other portions. Therefore, no current passes through the partial area of the portion, and the portion cannot effectively participate in heat generation. The first shunt groove 323 is provided at the location where the inner end of the first arm area 321 and the inner end of the second arm area 322 are connected, that is, in the middle of the spiral electric heating area 32 and the second shunt groove 324, so that the entire spiral electric heating area 32 can effectively participate in heating, thereby improving the overall heating uniformity of the flexible electric heating film 31.

Further, the electric heating component 30a of the heating film also includes a flexible substrate 37 that is mutually bonded with the flexible electric heating film 31, and the first electrode 35 and the second electrode 36 are fixedly laid on the flexible substrate 37;

Both the first electrode 35 and the second electrode 36 include a radially extending portion 351 and a bent portion 352, wherein,

The radial extension part 351 extends radially outward from the middle part of the flexible substrate 37 . The radial extension part 351 is isolated from the flexible electric heating film 31 by the flexible substrate 37 . The inner end of the radial extension part 351 is exposed on the flexible substrate 37 The side facing away from the flexible electric heating film 31;

The bending portion 352 extends from the outer end of the radially extending portion 351 along the outer edge of the outer end of the spiral electric heating area 32 . The bending portion 352 is exposed on the side of the flexible substrate 37 facing the flexible electric heating film 31 , and the bending portion 352 is in contact with the spiral electric heating area 32 Electrical fit.

In this embodiment, the flexible substrate 37 is usually made of insulating plastic. The first electrode 35 and the second electrode 36 are fixed on the flexible substrate 37 to increase the convenience of assembly. That is, the first electrode 35 and the second electrode 36 are fixed on the flexible substrate 37 . Before the electrode 36 is electrically connected to the flexible electric heating film 31, the first electrode 35 and the second electrode 36 are first fixed to the flexible substrate 37. The component thus obtained, that is, the flexible circuit board, is larger in size and can be more conveniently connected to the flexible circuit board. The heating film fits together. The radially extending portion 351 can conveniently form a connection point for an external power supply in the middle of the flexible substrate 37 , and by being isolated from the flexible electric heating film 31 , the radially extending portion 351 can be prevented from spanning the first arm area 321 and the second arm area 322 The gap between them (i.e., the first division groove 33 or the second division groove 34) prevents the formation of an undesigned electrical circuit. During specific manufacturing, after the flexible substrate 37 and the flexible electric heating film 31 are bonded and subjected to high temperature and high pressure processing, the first electrode 35 and the second electrode 36 exposed on the side of the flexible substrate 37 facing the flexible electric heating film 31 can be connected with the flexible electric heating film. The film 31 is fully adhered to the spiral electric heating area 32 thus formed.

Further, referring to FIGS. 6 to 8 , in the second embodiment of the electric heating component, a pair of first and second division grooves 42 and 43 are provided on the flexible electric heating film 40 . The two division grooves 43 are arranged symmetrically about the center of the flexible electric heating film 40, and a spiral electric heating area 41 is formed between the edges of the first division groove 42 and the second division groove 43 near the center;

The edges of the first zoning groove 42 and the second zoning groove 43 away from the center are arc-shaped, and the edges of the first zoning groove 42 and the second zoning groove 43 away from the center are in contact with the flexible electric heating film 40 An annular electric heating area 46 is formed between the outer edges of the annular electric heating area 46; the inner edge of the annular electric heating area 46 is connected to the two outer ends of the spiral electric heating area 41;

The first electrode 44 and the second electrode 45 are respectively connected to the two outer ends of the spiral electric heating area 41 and At the combined position of the annular electric heating area 46.

Compared with the first embodiment of the electric heating component, the first partition groove 42 and the second partition groove 43 of the second embodiment of the electric heating component have no obvious extension direction, and the resulting spiral electric heating area 41 is more stretched; By connecting the annular electric heating area 46 at the periphery of the spiral electric heating area 41 and setting electrodes at the combined positions of the spiral electric heating area 41 and the annular electric heating area 46, three parallel electric heating areas can be formed after energization. The spiral electric heating area 41 and the annular electric heating area 46 are The heat generated by the annular electric heating area 46 can be diffused to the first zoning groove 42 and the second zoning groove 43, forming a heat diffusion situation of "internal and external attack" on the first zoning groove 42 and the second zoning groove 43, and thus Get an even heating area quickly. In addition, since the flexible electric heating film 40 does not have a long and narrow cantilever, any part of the flexible electric heating film 40 is not prone to accidental folding when the flexible electric heating film 40 is transferred for assembly, which improves the convenience of assembly.

Furthermore, the spiral electric heating area 41 is provided with a central shunt groove 413 extending along the center line of its width direction. The outer end of the central shunt groove 413 is spaced apart from the inner edge of the annular electric heating area 46 .

In this embodiment, similarly to the first shunt groove 323 and the second shunt groove 324 provided in the first embodiment of the electric heating component, by setting the central shunt groove 413, the current can flow according to a preset path, thereby maximizing the The spiral electric heating area 41 is used to reduce the area of the ineffective electric heating area.

Further, referring to Figures 9 to 21, such as Figures 12, 17 and 21, in the third to fifth embodiments of the electric heating assembly:

The flexible electric heating films 50 and 55 are continuous sheets on the inside;

The first electrode 52 and the second electrode 53 both extend from the center of the flexible electric heating films 50 and 55 along a plane spiral. The spiral direction of the first electrode 52 and the spiral direction of the second electrode 53 are the same and 180 degrees different in the circumferential direction. A spacing of uniform width is formed between the electrode 52 and the second electrode 53;

The flexible electric heating films 50 and 55 cover the distance between the first electrode 52 and the second electrode 53, and the flexible electric heating films 50 and 55 are electrically connected to both the first electrode 52 and the second electrode 53; the spiral electric heating areas 51 and 56 are formed on between the first electrode 52 and the second electrode 53 .

In this embodiment, there is no need to trim the inner sides of the flexible electric heating films 50 and 55. The spiral electric heating areas 51 and 56 are directly formed between the first electrode 52 and the second electrode 53. Since the flexible electric heating films 50 and 55 do not have long and narrow Therefore, when the flexible electric heating films 50 and 55 are transferred for assembly, any part of the flexible electric heating films 50 and 55 is not prone to accidental folding, thereby improving the convenience of assembly. Uniform widths include uniformly equal widths, or uniformly larger or smaller widths.

Further, referring to Figures 13 to 17, in the fourth embodiment of the electric heating assembly, the flexible electric heating There are multiple films 50 and 55. The electric heating component 30d of the heating film also includes multiple flexible substrates 54 corresponding to the multiple flexible electrical heating films 50 and 55. The multiple flexible electrical heating films 50 and 55 are connected to multiple flexible substrates. The pieces 54 are alternately attached one to one;

A pair of first electrodes 52 and second electrodes 53 are fixedly laid on each flexible substrate 54 . Each pair of first electrodes 52 and second electrodes 53 are exposed on the corresponding side of the flexible substrate 54 toward the corresponding side of the flexible electric heating film 50 , 55 . On one side; in the projection along the thickness direction, each first electrode 52 is staggered in the circumferential direction, and each second electrode 53 is staggered in the circumferential direction.

In this embodiment, the flexible substrate 54 is usually made of insulating plastic. The first electrode 52 and the second electrode 53 are fixedly connected to the flexible substrate 54 in advance, so that the first electrode 52 and the second electrode 53 can be more accurately ensured. the distance between them; and then the obtained component (flexible circuit board) is attached to the flexible electric heating film 50, 55 to achieve electrical connection. Since two larger components are replaced by being attached together, it can bring Ease of assembly. By arranging multiple pairs of first electrodes 52 and second electrodes 53 , spiral electric heating areas 51 can be formed on different layers. These spiral electric heating areas 51 can be superimposed to a certain extent in the thickness direction, thereby reducing the overall area of the ineffective heating area. further reduction. And by controlling the power on and off of each pair of first electrodes 52 and second electrodes 53 respectively in time, for example, switching a pair of electrodes for power on every few seconds, forming a rotating effect similar to a marquee, switching different pairs of electrodes , and the combination of different electrode pairs per unit time can change the operating voltage and power, as well as the heating area, calorific value and switching frequency, so that the heating level control can be achieved. Referring to Figures 16 and 17, preferably, the electric heating component 30d of the heating film includes three pieces of flexible electric heating films 50, 55 and three pieces of flexible substrates 54. Each first electrode 52 is staggered by 120 degrees in the circumferential direction, and each second electrode 53 Staggered by 120 degrees in the circumferential direction; energizing any pair of first electrodes 52 and second electrodes 53 can achieve the first level of heating intensity, and energizing two pairs of the first electrodes 52 and second electrodes 53 can achieve the second level of heating intensity. Heating intensity, if all three pairs of first electrodes 52 and second electrodes 53 are energized, three levels of heating intensity can be achieved. It can be understood that in addition to being on and off, the current magnitude of the first electrode 52 and the second electrode 53 can also be controlled, thus achieving more precise control.

Further, the outer ends of the first electrode 52 and the second electrode 53 are both provided with wiring rings 521, and the flexible substrate 54 is provided with via holes 541 corresponding to the inner holes of the wiring rings 521 located on each layer.

In this embodiment, by providing electrical connection terminals at the outer ends of the first electrode 52 and the second electrode 53, there is no need to provide perforations in the middle of the flexible substrate 54 and the flexible electric heating films 50, 55 to connect the plurality of third electrodes 52 and 53. One electrode 52 and a plurality of second electrodes 53 are connected. Specifically, referring to Figure 25, it can be reset A flexible circuit board is placed with multiple jumpers on it. The jumpers are electrically connected to the wiring ring 521 through the solder provided at the via hole 541 of the flexible substrate 54, so that a connector can be set in the middle to connect to the external power supply.

Further, referring to Figures 18 to 21, in the fifth embodiment of the electric heating component, the electric heating component 30e of the heating film also includes a flexible substrate 57 that is mutually bonded with the flexible electric heating film 55. The flexible substrate 57 is provided with a plurality of For the first electrode 52 and the second electrode 53, each pair of the first electrode 52 and the second electrode 53 is exposed on the side of the flexible substrate 57 facing the flexible electric heating film 55; each first electrode 52 is staggered in the circumferential direction, and each pair of the first electrode 52 and the second electrode 53 is staggered in the circumferential direction. The second electrodes 53 are arranged staggered in the circumferential direction.

In this embodiment, similarly to the fourth embodiment of the electric heating component 30e, the flexible substrate 57 is usually made of insulating plastic. By adding the flexible substrate 57 for fixed connection, it can more accurately ensure that the first electrode 52 is connected to the second electrode 52 . The distance between the electrodes 53 improves assembly convenience. By arranging multiple pairs of first electrodes 52 and second electrodes 53 on the same flexible substrate 57, spiral electric heating areas 56 can be formed on the same layer, and these spiral electric heating areas 56 can be superimposed on each other on the flexible electric heating film 55, so that in Overall, the area of the non-effective heating area is further reduced. Referring to Figures 20 and 21, the electric heating component 30e of the heating film includes three flexible electric heating films 55 and a flexible substrate 57. Each first electrode 52 is staggered by 120 degrees in the circumferential direction, and each second electrode 53 is staggered by 120 degrees in the circumferential direction. ; By energizing any pair of the first electrode 52 and the second electrode 53, a level of heating intensity can be achieved, and any spiral electric heating area 56 can be replaced by another spiral electric heating area 56. Therefore, when one of the spiral electric heating areas 56 is damaged, At this time, another spiral electric heating area 56 can be activated, thus improving the reliability of the electric heating component 30e. In addition, by matching the first electrode 52 with another second electrode 53 whose phase angle is different from 180 degrees, new electric heating areas with different widths can be formed, so that more levels of electric heating intensity control can be achieved.

This application also proposes a heating film. Refer to Figures 22 to 33, such as Figures 22, 26, and 33. In the first to third embodiments of the heating film, the heating films 20a, 20d, and 20e include a cover 21a. , 21d, 21e, inner lining sheet 26, electrical connectors 27a, 27d and the electric heating components 30a, 30d, 30e of the heating films 20a, 20d, 20e mentioned above. The specific structures of the electric heating components 30a, 30d, 30e refer to the above. Embodiment: Since the heating films 20a, 20d, and 20e of the present invention adopt all the technical solutions of all the above-mentioned embodiments, they also have all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be repeated here.

The cover bodies 21a, 21d, and 21e are made of flexible material. The middle portions of the cover bodies 21a, 21d, and 21e are provided with a mounting groove 22. The lining sheet 26 is provided on the inside of the cover bodies 21a, 21d, and 21e, and is connected to the electrical connector 27a. 27d is fixedly installed in the installation groove 22, the electric heating components 30a, 30d, and 30e are provided between the inner lining sheet 26 and the cover 21a, 21d, and 21e. The first electrodes 35, 52 and the second electrodes 36, 53 are respectively connected to the electrical connection. The positive terminals and negative terminals of the devices 27a and 27d are electrically connected.

In this embodiment, the covers 21a, 21d, and 21e are made of flexible material so that they can be bent together with the electric heating components 30a, 30d, and 30e to fit the curved surface. Preferably, the covers 21a, 21d, and 21e are made of silicone material. The inner lining sheet 26 is a component used to contact the target surface, which can protect the target surface and the electric heating components 30a, 30d, 30e. Components to improve thermal efficiency can also be added between the cover 21a, 21d, 21e and the electric heating components 30a, 30d, 30e, and between the electric heating components 30a, 30d, 30e and the lining sheet 26, such as the cover 21a, 21d, 21e. A heat-insulating sheet and a thermal radiation emitting sheet can be disposed between them; and a thermally conductive adhesive layer can be disposed between the heating component and the lining sheet 26 .

Further, referring to Figures 24 to 33, in the second and third embodiments of the heating films 20a, 20d, 20e, the electric heating components 30a, 30d, 30e are provided with multiple pairs of first electrodes 35, 44 as described above. , 52 and the electric heating components 30a, 30d, 30e of the heating films 20a, 20d, 20e of the second electrodes 36, 45, 53. The heating films 20a, 20d, 20e also include a temperature sensor 60 and a programmable current limit switch 61, wherein,

The two connection ends of the temperature sensor 60 are electrically connected to the two signal terminals of the electrical connectors 27a and 27d respectively;

The programmable current-limiting switch 61 has a power connection interface and multiple current-limiting interfaces. The power-connection interface of the programmable current-limiting switch 61 is electrically connected to the power-connecting connectors 27a and 27d. The programmable current-limiting switch 61 has multiple current-limiting interfaces. are electrically connected to a plurality of first electrodes 35, 52 and/or a plurality of second electrodes 36, 53 respectively.

In this embodiment, by setting the temperature sensor 60, a feedback signal can be provided for circuit control, thereby achieving more precise control. By setting the programmable current limiting switch 61, the current size of each pair of electrodes can be better controlled, so that Better adjust the heat generation and heating area of the electric heating film.

This application also proposes an electronic thermal moxibustion instrument. Refer to Figures 34 to 37. In one embodiment, the electronic thermal moxibustion instrument 100 includes a host 10 and the heating film 20a as described above. The host 10 is provided with an electrical connection. The power supply connector 11 is detachably electrically connected by the device 27a. The specific structure of the heating film 20a refers to the above-mentioned embodiments. Since this electronic thermal moxibustion instrument adopts all the technical solutions of all the above-mentioned embodiments, it also has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. A further explanation.

In this embodiment, the host 10 and the heating film 20a are detachably connected, so that the heating film 20a and the host 10 can be quickly disconnected in the event of an accident; in addition, since the heating film 20a is separated from the host 10, the host 10 can maintain the form of a rigid body, and the heating film 20a can pass through itself to better fit the uneven surface; in addition, this structure is also conducive to replacing the heating film 20a when the heating film 20a is damaged.

Furthermore, the electrical connection terminals of the power connector 27a are all pins 271, and the power supply connector 11 is provided with a jack 121 adapted to the electrical connection terminals of the power connector 27a.

In this embodiment, by setting the pin 271, it is convenient to penetrate silk scarves and other fabrics, making it convenient for users to choose thin objects around them as straps, meeting individual needs and enhancing the practicality of the product.

Further, the cover body 21a, 21d, 21e includes a cover plate 23 and a boss 24 provided in the middle of the cover plate 23. The boss 24 is provided on the side of the cover plate 23 away from the electric heating components 30a, 30d, 30e. Pinholes 241 corresponding to the electrical connection terminals of the power connector 27a are provided;

Referring to Figures 30 to 33, in the third embodiment of the heating film, the top surface of the boss 24 is provided with a limiting cylinder 242 surrounding each pinhole 241. There is a limit slot 243a on the periphery; the electrical connection terminal of the power connector 27a is located in the inner cavity of the limit cylinder 242; the host 10 also includes a shell 12, which is provided with a plug-in connector that is adapted to the limit cylinder 242. The limiting circular groove (not shown), and the limiting protrusion (not shown) adapted to the limiting grooves 243a, 243b; or,

Referring to Figures 24 to 29, in the second embodiment of the heating film 20a, the top surface of the boss 24 is provided with a number of limiting grooves 243b; the host 10 includes a housing 12, and the housing is provided with a plurality of limiting grooves 243b. Limiting protrusion (not shown).

In this embodiment, by providing the boss 24, a gap for disassembly can be formed between the cover body 21a, 21d, 21e and the strap; and the installation groove 22 and the limiting groove 243a, 243b are provided in the boss 24 to avoid The structural strength of the covers 21a, 21d, 21e is excessively weakened. By arranging the limiting cylinder 242 and the limiting grooves 243a and 243b to cooperate with the corresponding limiting circular grooves and limiting protrusions on the casing of the host 10, the slender pins can be prevented from being bent laterally, that is, the slender pins can be prevented from being bent sideways. The pins of the host 10 are damaged during the plug-in process.

Further, the heating film 20a also includes an annular first magnetic component 62. The inner surfaces of the covers 21a, 21d, and 21e are provided with an annular groove 244 on the periphery of the mounting groove 22. The first magnetic component 62 is fixedly embedded in the annular groove 244. slot 244; the host 10 also includes a second magnetic component 13 that magnetically cooperates with the first magnetic component 62.

In this embodiment, by arranging the first magnetic member 62 and the second magnetic member 13 for magnetic cooperation, the reliability of the electrical connection between the power connector 27a and the power supply connector 11 can be increased to prevent accidental separation of the two. It can be understood that at least one of the first magnetic attraction component 62 and the second magnetic attraction component 13 is a magnet. In order to increase the magnetic attraction force, preferably, both the first magnetic attraction component 62 and the second magnetic attraction component 13 are magnets.

Further, referring to Figures 29 and 31, the covers 21d and 21e include a cover plate 23 and a self-covering plate The clamping edge 25 with the edge of 23 bent inward, the electric heating components 30d and 30e are located between the cover plate 23 and the lining sheet 26. The clamping edge 25 is located on the side of the lining sheet 26 away from the electric heating components 30d and 30e. The clamping edge 25 It can be separated from the lining sheet 26; when the clamping edge 25 and the lining sheet 26 are separated, a clamping space 70 is formed between the clamping edge 25 and the lining sheet 26.

In this embodiment, by setting the clamping edge 25, sheet-like accessories can be added to the heating film 20a, such as moxa velvet sheets or essential oil soaked sheets, etc. into the clamping space 70, so that these accessories can be attached to the inner lining sheet 26 The side facing the human skin. After being heated with electricity, the medicinal ingredients of these accessories can volatilize and penetrate into human skin, thus improving the effect of thermal moxibustion therapy.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: it can still Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims

An electric heating component of a heating film, including a flexible electric heating film and a first electrode and a second electrode arranged in pairs, characterized by:

The flexible electric heating film includes several spiral electric heating areas. Each of the spiral electric heating areas includes a first arm area and a second arm area arranged in pairs. The first arm area and the second arm area are formed from the flexible electric heating film. The center of the electric heating film extends along a plane spiral. The spiral directions of the first arm area and the second arm area are the same and 180 degrees different in the circumferential direction. The inner end of the first arm area and the inner end of the second arm area Connected; a plurality of the spiral electric heating areas are filled to form a circular or quasi-circular electric heating area;

Each pair of first electrodes and second electrodes is provided corresponding to one of the spiral electric heating areas, and each pair of first electrodes and second electrodes are respectively connected to two opposite sides of the corresponding spiral electric heating area.
The electric heating component of the heating film according to claim 1, characterized in that:

The flexible electric heating film is provided with a pair of first zoning grooves and a second zoning groove. The first zoning grooves and the second zoning grooves extend from the center of the flexible electric heating film along a plane spiral, so The spiral directions of the first dividing groove and the second dividing groove are the same and differ by 180 degrees in the circumferential direction;

The inner end of the first zoning groove is separated from the inner end of the second zoning groove, and the outer end of the first zoning groove and the outer end of the second zoning groove both run through the The outer edge of the flexible electric heating film;

The outer edge of the flexible electric heating film extends spirally along the adjacent first and second division grooves, and the outer edge of the flexible electric heating film is in contact with the first and second division grooves. forming a spiral electric heating area;

The first electrode and the second electrode are respectively connected to two outer ends of the spiral electric heating area.
The electric heating component of the heating film according to claim 2, characterized in that:

A pair of first shunt grooves and a second shunt groove are provided in the middle of the spiral electric heating area. The first shunt groove extends along the first dividing groove, and the first shunt groove extends from the first dividing groove to the second dividing groove. The distance between the inner end is equal to the distance from the first shunt groove to the first division groove;

The second branching groove extends along the second dividing groove, and the distance from the second dividing groove to the inner end of the first dividing groove is equal to the distance from the second dividing groove to the second dividing groove. .
The electric heating component of the heating film according to claim 2 or 3, further comprising a flexible substrate bonded to the flexible electric heating film, and the first electrode and the second electrode are fixedly laid on the flexible electric heating film. substrate;

Both the first electrode and the second electrode include a radially extending portion and a bending portion, wherein,

The radially extending portion extends radially outward from the middle portion of the flexible substrate, the radial extending portion is isolated from the flexible electric heating film by the flexible substrate, and the inner end of the radially extending portion Exposed on the side of the flexible substrate facing away from the flexible electric heating film;

The bent portion extends from the outer end of the radially extending portion along the outer edge of the outer end of the spiral electric heating area, the bent portion is exposed on a side of the flexible substrate facing the flexible electric heating film, and the The bending part is electrically connected to the spiral electric heating area.
The electric heating component of the heating film according to claim 1, characterized in that:

A pair of first zoning grooves and a second zoning groove are provided on the flexible electric heating film. The first zoning groove and the second zoning groove are arranged symmetrically about the center of the flexible electric heating film. The first zoning groove The spiral electric heating area is formed between the groove and the edge of the second division groove close to the center;

The edges of the first zoning groove and the second zoning groove away from the center are arc-shaped, and the edges of the first zoning groove and the second zoning groove away from the center are in contact with the flexible electric heater. An annular electric heating area is formed between the outer edges of the film; the inner edge of the annular electric heating area is connected to both outer ends of the spiral electric heating area;

The first electrode and the second electrode are respectively connected at the combined positions of the two outer ends of the spiral electric heating area and the annular electric heating area.
The electric heating component of the heating film according to claim 5, characterized in that the spiral electric heating area is provided with a central shunt extending along the center line of the width direction, and the outer end of the central shunt is in contact with the said central shunt. The inner edges of the annular electric heating areas are spaced apart.
The electric heating component of the heating film according to claim 1, characterized in that:

The flexible electric heating film is a continuous sheet on the inside;

The first electrode and the second electrode both extend along a plane spiral from the center of the flexible electric heating film. The spiral direction of the first electrode is the same as the spiral direction of the second electrode and differs by 180 degrees in the circumferential direction. A spacing of uniform width is formed between the first electrode and the second electrode;

The flexible electric heating film covers the distance between the first electrode and the second electrode, and the flexible electric heating film is electrically connected to both the first electrode and the second electrode; the spiral electric heating area is formed on the first electrode. between one electrode and the second electrode.
The electric heating component of the heating film according to claim 7, characterized in that:

The flexible electric heating film is provided with multiple pieces. The electric heating component of the heating film also includes a plurality of flexible substrates corresponding to the plurality of flexible electric heating films. The plurality of flexible electric heating films and the plurality of flexible substrates are Alternate fit settings on a one-to-one basis;

A pair of first electrodes and second electrodes are fixedly laid on each flexible substrate, and each pair of first electrodes and second electrodes are exposed on the corresponding side of the flexible electric heating film facing the corresponding side of the flexible substrate. On one side; in the projection along the thickness direction, each of the first electrodes is staggered in the circumferential direction, and each of the second electrodes is staggered in the circumferential direction.
The electric heating component of the heating film according to claim 8, wherein the outer ends of the first electrode and the second electrode are each provided with wiring rings, and the wiring rings located on each layer of the flexible substrate correspond to The inner hole of the ring is provided with via holes.
The electric heating component of the heating film according to claim 7, further comprising a flexible substrate bonded to the flexible electric heating film, and a plurality of pairs of first electrodes and second electrodes are provided on the flexible substrate, Each pair of the first electrode and the second electrode is exposed on the side of the flexible substrate facing the flexible electric heating film; each of the first electrodes is staggered in the circumferential direction, and each of the second electrodes is arranged in a circumferential direction. Stagger settings.
A heating film, characterized in that it includes a cover body, an inner lining sheet, an electrical connector and an electric heating component of the heating film according to any one of claims 1 to 10, and the cover body is made of flexible material. The middle part of the cover body is provided with an installation groove, the lining sheet is provided on the inside of the cover body, the electrical connector is fixedly installed on the installation groove, and the electric heating component is provided on the lining sheet. Between the cover body and the first electrode and the second electrode, the first electrode and the second electrode are electrically connected to the positive terminal and the negative terminal of the electrical connector respectively.
The heating film according to claim 11, characterized in that:

The electric heating component is an electric heating component of the heating film according to any one of claims 7 to 10, and the heating film further includes a temperature sensor and a programmable current limiting switch, wherein,

The two connection ends of the temperature sensor are electrically connected to the two signal terminals of the electrical connector respectively;

The programmable current-limiting switch has a power interface and a plurality of current-limiting interfaces. The power-connecting interface of the programmable current-limiting switch is electrically connected to the power connector. The plurality of limiting interfaces of the programmable current-limiting switch The flow interface is electrically connected to a plurality of first electrodes and/or a plurality of second electrodes respectively.
An electronic thermal moxibustion instrument, characterized in that it includes a host and the heating film according to claim 11 or 12, the host is provided with a power supply connector that is detachably electrically connected to the power connector.
The electronic thermal moxibustion instrument according to claim 13, characterized in that the electrical connection terminals of the power connector are all pins, and the power supply connector is provided with an electrical connection with the power connector. Connect the jack to which the terminals are adapted.
The electronic thermal moxibustion instrument as claimed in claim 14, characterized in that:

The cover body includes a cover plate and a boss located in the middle of the cover plate. The boss is located on a side of the cover plate away from the electric heating component. The boss is provided with the electrical connector. The pinholes corresponding to the electrical connection terminals;

The top surface of the boss is provided with a limiting cylinder surrounding each of the pinholes, and the top surface of the boss is provided with a limiting groove on the periphery of the limiting cylinder; the electrical connection The electrical connection terminal of the device is located in the inner cavity of the limiting cylinder; the host also includes a shell, and the shell is provided with a limiting circular groove that is adapted to be plugged into the limiting cylinder, and is connected to the limiting cylinder. The limit protrusion adapted to the limit groove; or,

The top surface of the boss is provided with a plurality of limiting grooves; the main machine includes a housing, and the housing is provided with limiting protrusions adapted to the limiting grooves.
The electronic thermal moxibustion instrument according to any one of claims 13 to 15, characterized in that the heating film further includes an annular first magnetic attraction piece, and the inner surface of the cover is provided on the periphery of the installation groove. There is an annular groove, and the first magnetic piece is fixedly embedded in the annular groove; the main machine also includes a second magnetic piece that magnetically cooperates with the first magnetic piece.
The electronic thermal moxibustion instrument according to claim 13, wherein the cover body includes a cover plate and a clip edge bent inward from the edge of the cover plate, and the electric heating component is located between the cover plate and the Between the lining sheets, the clamping edge is located on the side of the lining sheet away from the electric heating component, and the clamping edge and the lining sheet are separable; between the clamping edge and the lining sheet When the sheets are separated, a clamping space is formed between the clamping edge and the lining sheet.