A heating unit and its forming process

Abstract

The present invention provides a heating unit, including an inner heat-insulating shell with a cylindrical outer peripheral surface, a heating wire, an outer heat-conducting shell fixedly sleeved on the outside of the inner heat-insulating shell, an electrical connection component fixed to the inner heat-insulating shell, and a power supply component fixed relative to the inner heat-insulating shell, wherein the heating wire is wound on the cylindrical outer peripheral surface of the inner heat-insulating shell to form a cylindrical heating coil, and the cylindrical heating coil is fixed between the inner heat-insulating shell and the outer heat-conducting shell, and the two ends of the heating wire are connected to the electrical connection component, and the electrical connection component is connected to the power supply component. In the present application, the heating surface of the heating unit is a spatial surface rather than a plane, and the heat is uniformly generated. Combined with the thermal insulation performance of the inner heat-insulating shell and the thermal conductivity of the outer heat-conducting shell, it can block the heat from being transferred inward, and then allow the heat to be better transferred outward, so the heat loss is small, the heating effect is good, and the heating power is greatly reduced.

Description

Technical Field

[0001] The invention relates to the field of massage equipment, in particular to a heating unit for foot massage and a molding process of the heating unit. Background Art

[0002] With the accelerated pace of life in modern society, people are prone to various fatigue and soreness due to lack of exercise. Massage can relax tense muscles, eliminate fatigue, promote blood circulation, etc., which has a good effect on health care and strengthening the body. Based on this, there are many massage devices on the market. By massaging the human body, the human body can be relaxed and blood circulation can be promoted. Therefore, massage devices have been accepted and loved by more and more consumers.

[0003] Furthermore, in order to increase the functions of the massage device, some massage devices are equipped with a heating unit for massaging the sole of the foot. The heating unit is rotatably installed in the massage device, and the heating unit is usually provided with a protruding roller and a built-in heating component. However, the heating units currently on the market are basically flat heating units with a basic heating sheet structure. The main material of the heating unit is usually a non-heat-conducting material, so the heating unit has the problem of uneven heating, which leads to poor user experience. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a heating unit that generates heat evenly.

[0005] To achieve the above-mentioned purpose, the present invention provides a heating unit, comprising an inner thermal insulation shell having a cylindrical outer circumferential surface, a heating wire, an outer thermally conductive shell fixedly sleeved on the outside of the inner thermal insulation shell, an electrical connection component fixed to the inner thermal insulation shell, and a power supply component fixed relative to the inner thermal insulation shell, the heating wire is wound around the cylindrical outer circumferential surface of the inner thermal insulation shell to form a cylindrical heating coil, the cylindrical heating coil is fixed between the inner thermal insulation shell and the outer thermally conductive shell, both ends of the heating wire are connected to the electrical connection component, and the electrical connection component is connected to the power supply component.

[0006] Furthermore, the inner heat-insulating shell and the outer heat-conducting shell are both insulating parts.

[0007] Furthermore, the heating unit also includes a plurality of heating massage rollers, each of which includes a supporting protrusion protruding outward from the outer periphery of the inner heat-insulating shell, and a roller protrusion protruding outward from the outer heat-conducting shell, wherein the roller protrusion has a groove for accommodating the supporting protrusion, and a portion of the heating wire is wound around the roller protrusion.

[0008] Furthermore, the plurality of heat-generating massage rollers are staggered in both the axial and circumferential directions of the outer heat-conducting shell.

[0009] Furthermore, the heating wire is a nickel-titanium alloy wire, the electrical connection component includes a first conductive metal sheet connected to one end of the heating wire, and a second conductive metal sheet connected to the other end of the heating wire, the power supply component includes a carbon brush fixing seat fixed relative to the inner insulation shell, a carbon brush control board fixed to the carbon brush fixing seat, a carbon brush installed on the carbon brush fixing seat, a power supply control board fixed to the inner insulation shell, and a conductive slip ring plate fixed on the power supply control board, the first conductive metal sheet and the second conductive metal sheet are both connected to the power supply control board, the carbon brush is in contact with the conductive slip ring plate, and the carbon brush is connected to the carbon brush control board.

[0010] Furthermore, a first mounting groove extending along the length direction of the first conductive metal sheet and a second mounting groove extending along the length direction of the second conductive metal sheet are provided on the outer periphery of the inner thermal insulation shell. Both the first mounting groove and the second mounting groove are through grooves penetrating the inner thermal insulation shell. The first conductive metal sheet is placed in the first mounting groove and fixed to the inner thermal insulation shell. The second conductive metal sheet is placed in the first mounting groove and fixed to the inner thermal insulation shell.

[0011] Furthermore, buckle parts are integrally formed at the edges of the first conductive metal sheet and the second conductive metal sheet, and fixed slots are provided at the side walls of the first mounting groove and the second mounting groove of the inner heat-insulating shell, and the buckle parts and the fixed slots are engaged with each other.

[0012] Furthermore, one end of the first conductive metal sheet abuts against the first limit bracket, and the other end is passed through the second limit bracket, and the first limit bracket and the second limit bracket are respectively fixed at the two ends of the first mounting groove; one end of the second conductive metal sheet abuts against the third limit bracket, and the other end is passed through the fourth limit bracket, and the third limit bracket and the fourth limit bracket are respectively fixed at the two ends of the second mounting groove.

[0013] Furthermore, a compression spring is fixed between the carbon brush fixing seat and the carbon brush.

[0014] Furthermore, the heating unit also includes a temperature controller fixed on the cylindrical outer peripheral surface of the inner heat-insulating shell, the temperature controller is fitted with the outer heat-conducting shell and is used to detect the heating temperature of the outer heat-conducting shell, and the temperature controller is connected between the first conductive metal sheet and the power supply control board, or between the second conductive metal sheet and the power supply control board.

[0015] Furthermore, a wire groove for accommodating the heating wire is provided on the outer peripheral surface of the inner heat-insulating shell, and the wire groove is in an inverted triangle shape with an opening facing outward.

[0016] Furthermore, the inner surface of the outer heat-conducting shell is in contact with the cylindrical heating coil.

[0017] Furthermore, a plurality of material reduction grooves are provided in the inner heat-insulating shell.

[0018] The present invention also provides a heating unit forming process, comprising the following steps:

[0019] S1, a single injection molding process of the inner heat-insulating shell, after demoulding, the inner heat-insulating shell has a cylindrical outer peripheral surface;

[0020] S2. Fix the electrical connection assembly to the inner heat-insulating housing;

[0021] S3, winding a heating wire on the cylindrical outer circumference of the inner heat-insulating shell, forming a cylindrical heating coil sleeved on the cylindrical outer circumference of the inner heat-insulating shell after the heating wire is wound, and connecting both ends of the heating wire to the electrical connection assembly;

[0022] S4, performing secondary injection molding of an outer heat-conducting shell on the inner heat-insulating shell wrapped with a cylindrical heating coil and fixed with an electrical connection component, after demoulding, the fixing sleeve is arranged on the outside of the inner heat-insulating shell, and the cylindrical heating coil is fixed between the inner heat-insulating shell and the outer heat-conducting shell;

[0023] S5. Install a power supply assembly fixed relative to the inner heat-insulating shell, and connect the power supply assembly to the electrical connection assembly.

[0024] As described above, the heating unit and the molding process thereof according to the present invention have the following beneficial effects:

[0025] In the present application, the heating surface of the heating unit is a spatial surface rather than a plane, and the heat is evenly generated. Combined with the thermal insulation performance of the inner insulation shell and the thermal conductivity performance of the outer heat conductive shell, it can block the heat from transferring inward, thereby allowing the heat to transfer outward better, so there is less heat loss, the heating effect is good, and the heating power is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the thermal motion device in this application.

[0027] Figure 2 It is a structural schematic diagram of the transmission unit in this application.

[0028] Figure 3 and Figure 4 It is a schematic diagram of the structure of the heating unit in this application.

[0029] Figure 5 and Figure 6 It is a schematic diagram of the connection between the inner insulation shell and the electrical connection assembly in this application.

[0030] Figure 7 for Figure 6 Enlarged view of circle A.

[0031] Figure 8 This is a schematic diagram of the structure after the inner insulation shell, electrical connection components, temperature controller and outer heat conduction shell are assembled.

[0032] Fig. 9 for Figure 8 Left view of .

[0033] Fig.10 For Figure 8 Schematic diagram of the structure after the power supply control board is installed on the basis.

[0034] Component number description

[0035] 1 Drive shaft

[0036] 2 Transmission unit

[0037] 3 Heating Unit

[0038] 4 Inner insulation shell

[0039] 41 support convex part

[0040] 42 Wire Slots

[0041] 43 First installation slot

[0042] 44 Fixed card slot

[0043] 45 Third mounting slot

[0044] 46 Reduction tank

[0045] 47 Connection slot

[0046] 5 Heating wire

[0047] 6 External heat conduction shell

[0048] 61 Roller convex part

[0049] 7. First conductive metal sheet

[0050] 8 Second conductive metal sheet

[0051] 81 Buckle

[0052] 9 Carbon brush holder

[0053] 10 Carbon brush control board

[0054] 11 Carbon brush

[0055] 12 Power supply control board

[0056] 13 Slip ring plate

[0057] 14 Compression spring

[0058] 15 Thermostat

[0059] 16 First limit bracket

[0060] 17 Second limit bracket

[0061] 18 Fourth limit bracket

[0062] 19 Fifth limit bracket

[0063] 20 Drive Motor

[0064] 21 Drive worm

[0065] 22 Drive worm gear

[0066] 23 Gearbox

[0067] 231 Upper cover

[0068] 232 lower cover

[0069] 24 Bearings

[0070] 25 Limiting spring DETAILED DESCRIPTION

[0071] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0072] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0073] The present application relates to a massage device in the home appliance industry, such as a massage chair, a foot massager, etc., and more particularly to a thermal motion device in a massage device for performing a heating massage on a human foot. Figure 1As shown, the thermal motion device comprises a rotatable transmission shaft 1, a transmission unit 2 driving the transmission shaft 1 to rotate, and a heating unit 3 installed at both ends of the transmission shaft 1, and the two sets of heating units 3 are arranged in left and right mirror images. For the convenience of description, the axial direction of the transmission shaft 1 is defined as the left and right direction, and the heating unit 3 installed at the left end of the transmission shaft 1 is taken as an example to describe the preferred structure of the heating unit 3.

[0074] like Figure 3 and Figure 4 As shown, the heating unit 3 includes an inner insulation shell 4 with a cylindrical outer circumferential surface, a heating wire 5, an outer heat-conducting shell 6 fixedly sleeved on the outside of the inner insulation shell 4, an electrical connection component fixed to the inner insulation shell 4, and a power supply component fixed relative to the inner insulation shell 4, the inner insulation shell 4 is fixed to the transmission shaft 1, the heating wire 5 is wound on the cylindrical outer circumferential surface of the inner insulation shell 4 to form a cylindrical heating coil, the cylindrical heating coil is fixed between the inner insulation shell 4 and the outer heat-conducting shell 6, both ends of the heating wire 5 are connected to the electrical connection component, the electrical connection component is connected to the power supply component, and the materials of the inner insulation shell 4 and the outer heat-conducting shell 6 are different and both are insulated.

[0075] When the thermal motion device is working, the transmission unit 2 drives the transmission shaft 1 to rotate, thereby driving the heating units 3 fixed at the left and right ends of the transmission shaft 1 to rotate together, and the human foot contacts the outer heat-conducting shell 6, thereby massaging the human foot. In addition, the power supply component supplies power to the heating wire 5 through the electrical connection component, and the cylindrical heating coil heats up, and the heat is transferred to the human foot through the outer heat-conducting shell 6, achieving the effect of heating and massaging, which can effectively promote blood circulation in the human foot and has a certain health care effect. In particular, in the present application, heat is provided by a cylindrical heating coil, and the cylindrical heating coil is a spatial curved surface formed by the heating wire 5 in a spatial winding manner, so that the heating surface of the heating unit 3 is a spatial surface rather than a plane; in addition, the inner heat-insulating shell 4 is made of non-heat-conducting material and has heat-insulating properties, which can block heat from being transferred inward and reduce heat loss. While playing a role in heat preservation, it can also protect the internal transmission shaft 1 and other components; and the outer heat-conducting shell 6 is made of a material with high thermal conductivity and has thermal conductivity, which ultimately enables the heating unit 3 to better transfer heat to the outside, generate heat evenly, and have a good heating effect, greatly reducing the heating power.

[0076] In addition, the materials of the inner heat insulating shell 4 and the outer heat conducting shell 6 are different. Based on this, the present application provides another molding process of the heating unit 3, including the following steps:

[0077] S1, one-time injection molding of the inner heat-insulating shell 4, after demoulding, the inner heat-insulating shell 4 has a cylindrical outer peripheral surface;

[0078] S2, fixing the electrical connection assembly to the inner heat-insulating housing 4;

[0079] S3, winding the heating wire 5 on the cylindrical outer circumference of the inner heat-insulating shell 4, after the heating wire 5 is wound, a cylindrical heating coil is formed on the cylindrical outer circumference of the inner heat-insulating shell 4, and the two ends of the heating wire 5 are connected to the electrical connection assembly;

[0080] S4, the outer heat-conducting shell 6 is processed by secondary injection molding on the inner heat-insulating shell 4 wrapped with the cylindrical heating coil and fixed with the electrical connection component. After demoulding, the fixing sleeve is arranged on the outside of the inner heat-insulating shell 4, and the cylindrical heating coil is fixed between the inner heat-insulating shell 4 and the outer heat-conducting shell 6;

[0081] S5. Install a power supply assembly fixed relative to the inner heat-insulating shell 4, and connect the power supply assembly to the electrical connection assembly.

[0082] The present application uses composite injection molding of two materials to fix the outer heat-conducting shell 6 to the inner heat-insulating shell 4, and to fix the cylindrical heating coil and the electrical connection component between the inner heat-insulating shell 4 and the outer heat-conducting shell 6. The processing technology is simplified, easy to implement, and low in cost. After the secondary injection molding is completed, the power supply component is connected and the device can be used.

[0083] In the above-mentioned heating unit 3, the inner heat-insulating shell 4 and the outer heat-conducting shell 6 are both insulating parts; the inner heat-insulating shell 4 is made of a heat-insulating material resistant to high temperatures, and the outer heat-conducting shell 6 is made of a heat-conducting material resistant to high temperatures, so the inner heat-insulating shell 4 and the outer heat-conducting shell 6 both have the advantages of good insulation properties, wear resistance, high hardness, etc. In addition, the cylindrical outer peripheral surface of the inner heat-insulating shell 4 is cylindrical, so the cylindrical heating coil is also cylindrical, and the main body of the inner heat-insulating shell 4 and the main body of the outer heat-conducting shell 6 are both cylindrical.

[0084] like Figures 4 to 6As shown, the heating unit 3 also includes a plurality of heating massage rollers, each of which includes a support protrusion 41 protruding outward from the outer periphery of the inner heat-insulating shell 4, and a roller protrusion 61 protruding outward from the outer heat-conducting shell 6, wherein the roller protrusion 61 has a groove for accommodating the support protrusion 41, and a part of the heating wire 5 is wound around the roller protrusion 61, that is, the heating wire 5 will be wound around the roller protrusion 61 when it is wound. When massaging the human foot, the protruding heating massage roller contacts the human foot, performs rolling massage on the human foot, and improves the massage effect; and, the heating wire 5 is also wound around the support protrusion 41, so the roller protrusion 61 will heat up, so that the heating massage roller generates heat quickly and evenly, and the first thing that the human foot contacts during massage is the heating massage roller, thereby improving the heating massage effect of the heating unit 3. In addition, the plurality of heating massage rollers are staggered in the axial and circumferential directions of the outer heat-conducting shell 6, so that the plurality of heating massage rollers are reasonably distributed, so that the heating is more uniform and the massage effect is better; in the present application, there are six heating massage rollers. At least two turns of heating wire 5 are wound around each supporting protrusion 41 to ensure that the heating massage roller has a better heating effect. Therefore, when the heating wire 5 is wound around the inner heat-insulating shell 4, an unequal spacing winding method is adopted to ensure that at least two turns of heating wire 5 are wound around each supporting protrusion 41.

[0085] like Figure 6 and Figure 7 As shown, a wire groove 42 for accommodating the heating wire 5 is provided on the outer circumferential surface of the inner heat-insulating shell 4, so each supporting protrusion 41 is also provided with at least two wire grooves 42, and the wire groove 42 is in the shape of an inverted triangle with the opening facing outward; when adopting the wire groove 42 of this shape, the heating wire 5 can be firmly wound into the wire groove 42 during winding, but it can ensure that the heating wire 5 and the bottom of the wire groove 42 are not completely in contact, so that a space is formed between the heating wire 5 and the bottom of the wire groove 42, that is, a space is reserved for subsequent secondary injection molding, so that when the outer heat-conducting shell 6 is subsequently processed by secondary injection molding, the secondary injection-molded thermally conductive plastic can be filled between the heating wire 5 and the bottom of the wire groove 42, completely wrapping the heating wire 5, so that the inner surface of the outer heat-conducting shell 6 is in close contact with the cylindrical heating coil, effectively increasing the contact area between the outer heat-conducting shell 6 and the heating wire 5, so that the heat can be better dissipated and transferred to the outside. In addition, the inner insulation shell 4 and the heating wire 5 are quickly connected by interference fit through the inverted triangle-shaped wire groove 42. It only needs to process the wire groove 42 on the inner insulation shell 4, and there is no need to clamp, weld, etc. the heating wire 5, thereby reducing the processing steps.

[0086] In addition, the heating wire 5 is a metal heating wire 5, preferably a nickel-titanium alloy wire; based on this, the electrical connection component preferably adopts the following structure: Figures 3 to 6 ,as well as Figures 8 to 10As shown, the electrical connection assembly includes a first conductive metal sheet 7 connected to one end of the heating wire 5, and a second conductive metal sheet 8 connected to the other end of the heating wire 5. The power supply assembly includes a carbon brush fixing seat 9 fixed to the transmission shaft 1, a carbon brush control board 10 fixed on the left end surface of the carbon brush fixing seat 9, a carbon brush 11 installed on the right end surface of the carbon brush fixing seat 9, a power supply control board 12 fixed to the left end surface of the inner heat-insulating shell 4, and a conductive slip ring plate 13 fixed on the left end surface of the power supply control board 12. The carbon brush fixing seat 9 is relatively fixed to the inner heat-insulating shell 4. The first conductive metal sheet 7 and the second conductive metal sheet 8 are both connected to the power supply control board 12. The carbon brush 11 is in contact with the conductive slip ring plate 13, and the carbon brush 11 is connected to the carbon brush control board 10. The first conductive metal sheet 7 and the second conductive metal sheet 8 conduct the ends of the heating wire 5 to form a loop, and are electrically connected to the power supply control board 12. It is resistive heating, and the resistance value remains unchanged when the temperature changes, which is convenient for control. The external voltage is electrically connected to the power supply control board 12 through the carbon brush control board 10, the carbon brush 11 and the conductive slip ring board 13, thereby supplying power to the heating wire 5 and causing the heating wire 5 to heat up. The carbon brush fixing seat 9 and the carbon brush control board 10, as well as the power supply control board 12 and the inner heat insulation shell 4 are fixedly connected by fasteners such as screws. In addition, a compression spring 14 is fixed between the carbon brush fixing seat 9 and the carbon brush 11, and the compression spring 14 always applies a pre-tightening force to the carbon brush 11, so that the carbon brush 11 is always in close contact with the conductive slip ring board 13, thereby ensuring the reliability of power supply.

[0087] like Figure 3 , Figure 5 and Figure 6 , Figure 8 and Fig. 9As shown, the outer periphery of the inner heat-insulating shell 4 is provided with a first mounting groove 43 extending left and right along the length direction of the first conductive metal sheet 7, and a second mounting groove extending left and right along the length direction of the second conductive metal sheet 8; in order to facilitate mold opening and injection molding of the inner heat-insulating shell 4, the first mounting groove 43 and the second mounting groove are both through grooves that pass through the inner heat-insulating shell 4 from left to right, the first conductive metal sheet 7 is placed in the first mounting groove 43 and fixed to the inner heat-insulating shell 4, and the second conductive metal sheet 8 is placed in the first mounting groove 43 and fixed to the inner heat-insulating shell 4. Preferably, the first conductive metal sheet 7 and the inner heat-insulating shell 4, and the second conductive metal sheet 8 and the inner heat-insulating shell 4 are both fixed by snap-fitting; that is, the edges of the first conductive metal sheet 7 and the second conductive metal sheet 8 are integrally formed with snap-fitting portions 81, and the inner heat-insulating shell 4 is provided with fixing snap-fitting portions 44 at the side walls of the first mounting groove 43 and the second mounting groove, and the snap-fitting portions 81 and the fixing snap-fitting portions 44 are engaged with each other, thereby fixing the first conductive metal sheet 7 to the inner heat-insulating shell 4, and fixing the second conductive metal sheet 8 to the inner heat-insulating shell 4. At the same time, the right end of the first conductive metal sheet 7 abuts against the first limiting bracket 16, and the left end is inserted into the second limiting bracket 17 and connected to the power supply circuit board after emerging from the second limiting bracket 17, and the first limiting bracket 16 and the second limiting bracket 17 are respectively fixed at the two ends of the first mounting groove 43, and are both tightly fitted and fixed with the first mounting groove 43, and the two ends of the first conductive metal sheet 7 are limited by the first limiting bracket 16 and the second limiting bracket 17. Similarly, the right end of the second conductive metal sheet 8 is abutted against the third limit bracket, and the left end is passed through the fourth limit bracket 18 and connected to the power supply circuit board after emerging from the fourth limit bracket 18. The third limit bracket and the fourth limit bracket 18 are respectively fixed at the two ends of the second mounting groove, and are both tightly fixed to the second mounting groove. The third limit bracket and the fourth limit bracket 18 are used to limit the two ends of the second conductive metal sheet 8.

[0088] like Figure 3 , Figure 5 and Figure 6 , Figure 8 and Fig. 9As shown, the heating unit 3 also includes a thermostat 15, and a third mounting groove 45 for accommodating the thermostat 15 is provided on the cylindrical outer peripheral surface of the inner heat-insulating shell 4. The thermostat 15 is tightly fitted with the third mounting groove 45 and fixed to the cylindrical outer peripheral surface of the inner heat-insulating shell 4; the thermostat 15 is fitted with the outer heat-conducting shell 6 and is used to detect the heating temperature of the outer heat-conducting shell 6. The thermostat 15 is connected between the first conductive metal sheet 7 and the power supply control board 12, or between the second conductive metal sheet 8 and the power supply control board 12. When the thermostat 15 detects that the heating temperature of the outer heat-conducting shell 6 is too high, the thermostat 15 is automatically disconnected, thereby blocking the power supply of the heating wire 5, playing a control and protection role; after the heating temperature of the outer heat-conducting shell 6 is reduced, the thermostat 15 is automatically connected again, so that the heating wire 5 resumes heating. In addition, a fifth limiting bracket 19 tightly fitted and fixed to the third mounting groove 45 is provided at the left end of the thermostat 15 , and the contacts on the thermostat 15 extend from the fifth limiting bracket 19 and are connected to the power supply circuit board.

[0089] like Fig. 9 The inner heat-insulating shell 4 is provided with several material reduction grooves 46 to reduce material consumption and thus reduce costs. The inner heat-insulating shell 4 is also provided with a connection groove 47 that matches the transmission shaft 1. In this embodiment, the inner heat-insulating shell 4 and the transmission shaft 1 are connected by a flat key.

[0090] The processing technology of the heating unit 3 with the above structure is as follows: 1. Injection molding the inner heat-insulating shell 4 in one step; 2. Install the first conductive metal sheet 7, the second conductive metal sheet 8, the first limit bracket 16, the third limit bracket, and the temperature controller 15 on the inner heat-insulating shell 4; 3. Wind the heating wire 5 on the inner heat-insulating shell 4, and connect the two ends of the heating wire 5 to the first conductive metal sheet 7 and the second conductive metal sheet 8 respectively; 4. Install the second limit bracket 17 on the left end of the first conductive metal sheet 7, and install the fourth limit bracket 18 on the left end of the second conductive metal sheet 8, and install the fourth limit bracket 18 on the temperature controller 15. The left end of the device 15 is assembled with a fifth limit bracket 19; 5. The inner insulation shell 4 assembled with the first conductive metal sheet 7, the second conductive metal sheet 8, the first limit bracket 16, the second limit bracket 17, the third limit bracket, the fourth limit bracket 18, the temperature controller 15 and the fifth limit bracket 19 is subjected to an overall secondary injection molding shell to form an outer heat-conducting shell 6 fixed to the outside of the inner insulation shell 4; 6. The power supply circuit board is assembled; 7. The carbon brush fixing seat 9, the carbon brush control board 10 and the carbon brush 11 are installed, and the carbon brush 11 is contacted and connected with the conductive slip ring plate 13 on the power supply circuit board.

[0091] Furthermore, the transmission unit 2 preferably adopts the following structure: Figure 2As shown, the transmission unit 2 includes a driving motor 20, a driving worm 21 fixed to the output end of the driving motor 20, a driving worm wheel 22 fixed on the transmission shaft 1, and a gear box 23. The gear box 23 has an upper cover 231 and a lower cover 232 fixedly connected by screws. The transmission shaft 1 is rotatably supported in the gear box 23 through two bearings 24. The driving worm 21 and the driving worm wheel 22 are matched in transmission. The driving worm 21 and the driving worm wheel 22 are both accommodated in the gear box 23. The driving motor 20 rotates, driving the driving worm 21 to rotate together. The driving worm wheel 22 rotates through the transmission cooperation between the driving worm 21 and the driving worm wheel 22, thereby driving the transmission shaft 1 and the heating unit 3 fixed at the left and right ends of the transmission shaft 1 to rotate together, thereby realizing a rolling massage of the human foot. The driving motor 20 can be a servo motor. In addition, the transmission shaft 1 is provided with a limit spring 25 on the outside of each bearing 24 to play the role of axial limit. During assembly, first install the driving worm gear 22 on the transmission shaft 1, install a bearing 24 on the left and right sides of the driving worm gear 22, and then install the limit spring 25 on the outside of the bearing 24; then, fix the driving motor 20, install the driving worm 21, assemble and connect the driving worm 21 and the driving worm gear 22, and finally install the gear box 23.

[0092] The present application also provides a massage chair, in which the thermal motion device as described above is configured.

[0093] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0094] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A heating unit, characterized in that: The invention comprises a plurality of heating massage rollers, an inner heat-insulating shell (4) having a cylindrical outer peripheral surface, a heating wire (5), an outer heat-conducting shell (6) fixedly sleeved on the outside of the inner heat-insulating shell (4), an electrical connection component fixed to the inner heat-insulating shell (4), and a power supply component fixed relative to the inner heat-insulating shell (4), wherein the heating wire (5) is wound on the cylindrical outer peripheral surface of the inner heat-insulating shell (4) to form a cylindrical heating coil, and the cylindrical heating coil is fixed between the inner heat-insulating shell (4) and the outer heat-conducting shell (6), and both ends of the heating wire (5) are connected to the electrical connection component, and the electrical connection component is connected to the power supply component; Each heating massage roller comprises a supporting protrusion (41) protruding outward from the outer periphery of the inner heat-insulating shell (4), and a roller protrusion (61) protruding outward from the outer heat-conducting shell (6), wherein the roller protrusion (61) has a groove for accommodating the supporting protrusion (41), and a portion of the heating wire (5) is wound around the roller protrusion (61); The heating wire (5) is a nickel-titanium alloy wire, the electrical connection component comprises a first conductive metal sheet (7) connected to one end of the heating wire (5), and a second conductive metal sheet (8) connected to the other end of the heating wire (5), the power supply component comprises a carbon brush fixing seat (9) fixed relative to the inner heat-insulating shell (4), a carbon brush control board (10) fixed to the carbon brush fixing seat (9), a carbon brush (11) mounted on the carbon brush fixing seat (9), a power supply control board (12) fixed to the inner heat-insulating shell (4), and a conductive slip ring plate (13) fixed on the power supply control board (12), the first conductive metal sheet (7) and the second conductive metal sheet (8) are both connected to the power supply control board (12), the carbon brush (11) is in contact with the conductive slip ring plate (13), and the carbon brush (11) is connected to the carbon brush control board (10).

2. The heating unit according to claim 1, characterized in that: The inner heat-insulating shell (4) and the outer heat-conducting shell (6) are both insulating parts.

3. The heating unit according to claim 1, characterized in that: The plurality of heat-generating massage rollers are staggeredly distributed in the axial direction and the circumferential direction of the outer heat-conducting housing (6).

4. The heating unit according to claim 1, characterized in that: The outer periphery of the inner heat-insulating shell (4) is provided with a first mounting groove (43) extending along the length direction of the first conductive metal sheet (7), and a second mounting groove extending along the length direction of the second conductive metal sheet (8); the first mounting groove (43) and the second mounting groove are both through grooves penetrating the inner heat-insulating shell (4); the first conductive metal sheet (7) is arranged in the first mounting groove (43) and fixed to the inner heat-insulating shell (4); and the second conductive metal sheet (8) is arranged in the first mounting groove (43) and fixed to the inner heat-insulating shell (4).

5. The heating unit according to claim 4, characterized in that: A snap-fit ​​portion (81) is integrally formed at the edges of the first conductive metal sheet (7) and the second conductive metal sheet (8); a fixed snap-fitting groove (44) is provided at the side walls of the first mounting groove (43) and the second mounting groove; the snap-fitting portion (81) and the fixed snap-fitting groove (44) are snap-fitted with each other.

6. The heating unit according to claim 4, characterized in that: One end of the first conductive metal sheet (7) abuts against a first limit bracket (16), and the other end is inserted into a second limit bracket (17); the first limit bracket (16) and the second limit bracket (17) are respectively fixed at two ends of a first mounting groove (43); one end of the second conductive metal sheet (8) abuts against a third limit bracket, and the other end is inserted into a fourth limit bracket (18); the third limit bracket and the fourth limit bracket (18) are respectively fixed at two ends of the second mounting groove.

7. The heating unit according to claim 1, characterized in that: A compression spring (14) is fixedly arranged between the carbon brush fixing seat (9) and the carbon brush (11).

8. The heating unit according to claim 1, characterized in that: The invention also comprises a temperature controller (15) fixed on the cylindrical outer peripheral surface of the inner heat-insulating shell (4), wherein the temperature controller (15) is in contact with the outer heat-conducting shell (6) and is used to detect the heating temperature of the outer heat-conducting shell (6), and the temperature controller (15) is connected between the first conductive metal sheet (7) and the power supply control board (12), or between the second conductive metal sheet (8) and the power supply control board (12).

9. The heating unit according to claim 1, characterized in that: A wire groove (42) for accommodating a heating wire (5) is provided on the outer peripheral surface of the inner heat-insulating shell (4), and the wire groove (42) is in the shape of an inverted triangle with its opening facing outward.

10. The heating unit according to claim 1, characterized in that: The inner surface of the outer heat-conducting shell (6) is in contact with the cylindrical heating coil.

11. The heating unit according to claim 1, characterized in that: A plurality of material reduction grooves (46) are provided in the inner heat-insulating shell (4).

12. A heating unit molding process, characterized in that: The following steps are involved: S1, a single injection molding process of the inner heat-insulating shell (4), after demoulding, the inner heat-insulating shell (4) has a cylindrical outer peripheral surface; S2, fixing the electrical connection assembly to the inner heat-insulating housing (4); S3, winding a heating wire (5) on the cylindrical outer peripheral surface of the inner heat-insulating shell (4), and after the heating wire (5) is wound, a cylindrical heating coil is formed which is sleeved on the cylindrical outer peripheral surface of the inner heat-insulating shell (4), and the two ends of the heating wire (5) are connected to the electrical connection component; S4, performing secondary injection molding on the inner heat-insulating shell (4) wrapped with a cylindrical heating coil and fixed with an electrical connection component to form an outer heat-conducting shell (6); after demoulding, the outer heat-conducting shell (6) is fixedly sleeved on the outside of the inner heat-insulating shell (4), and the cylindrical heating coil is fixed between the inner heat-insulating shell (4) and the outer heat-conducting shell (6); S5, installing a power supply component fixed relative to the inner heat-insulating shell (4), and connecting the power supply component to the electrical connection component; the heating unit further comprises a plurality of heating massage rollers, each heating massage roller comprising a supporting protrusion (41) protruding outward from the outer periphery of the inner heat-insulating shell (4), and a roller protrusion (61) protruding outward from the outer heat-conducting shell (6), the roller protrusion (61) having a groove for accommodating the supporting protrusion (41), and a portion of the heating wire (5) being wound around the roller protrusion (61); The heating wire (5) is a nickel-titanium alloy wire, the electrical connection component comprises a first conductive metal sheet (7) connected to one end of the heating wire (5), and a second conductive metal sheet (8) connected to the other end of the heating wire (5), the power supply component comprises a carbon brush fixing seat (9) fixed relative to the inner heat-insulating shell (4), a carbon brush control board (10) fixed to the carbon brush fixing seat (9), a carbon brush (11) mounted on the carbon brush fixing seat (9), a power supply control board (12) fixed to the inner heat-insulating shell (4), and a conductive slip ring plate (13) fixed on the power supply control board (12), the first conductive metal sheet (7) and the second conductive metal sheet (8) are both connected to the power supply control board (12), the carbon brush (11) is in contact with the conductive slip ring plate (13), and the carbon brush (11) is connected to the carbon brush control board (10).

Images