Steering wheel switch heat dissipation device

Abstract

The utility model provides a heat dissipation device for a steering wheel switch, which belongs to the technical field of steering wheel switches and comprises a circuit board, a base, a heat dissipation sheet, a first heat conduction silica gel sheet and a second heat conduction silica gel sheet, and one end of the heat dissipation sheet is connected with a heat source area with the highest temperature on the circuit board through the first heat conduction silica gel sheet. The other end is connected to the outside of the steering wheel switch through a second heat-conducting silica gel sheet; according to the utility model, the radiating fin is additionally arranged in the steering wheel switch, the heat-conducting silica gel sheet is attached to the high-current heating component area of the circuit board and is connected with one end of the radiating fin, and the other end of the radiating fin is connected with the steering wheel radiating framework through the heat-conducting silica gel sheet; therefore, internal heat of the steering wheel switch is transmitted to the outside of the steering wheel switch through the cooling fins, the stability of electronic components is improved, the temperature of a manual operation area of the steering wheel switch is reduced, and the user experience result is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to steering wheel switch technical field, concretely relates to a steering wheel switch heat abstractor. BACKGROUND

[0002] With the rapid development of automotive electronics technology, the steering wheel has not only been a simple mechanical component for controlling the direction of the vehicle, but also a complex system integrating various electronic functions. Modern car steering wheels integrate numerous switches and control buttons. These electronic switches and buttons achieve various functions such as audio control, cruise control, and phone answering through circuit boards and various electronic components. These electronic components will generate heat during operation. If the heat cannot be effectively dissipated, it may cause the surface temperature of the steering wheel to rise, affecting the user's operation experience, and even may cause safety hazards.

[0003] Traditional steering wheel switches lack effective heat dissipation design, especially under long-term use or high load conditions. The heat accumulation of internal electronic components can significantly increase the surface temperature of the steering wheel. High temperature not only affects user comfort, but also may cause performance degradation or failure of electronic components. Therefore, how to effectively reduce the surface temperature of the steering wheel switch hand control area and improve user experience has become a problem to be solved. SUMMARY

[0004] The utility model aims at overcoming the shortcomings and deficiencies of prior art, and provides a steering wheel switch heat abstractor.

[0005] The technical scheme adopted by the utility model is as follows: the application provides a steering wheel switch heat abstractor, which comprises a circuit board and a base, and further comprises a heat sink, a first heat-conducting silica gel sheet and a second heat-conducting silica gel sheet. One end of the heat sink is connected to the highest temperature heat source area on the circuit board through the first heat-conducting silica gel sheet, and the other end is connected to the outside of the steering wheel switch through the second heat-conducting silica gel sheet.

[0006] In some embodiments, the heat sink comprises a first connecting plate part, a heat-conducting plate part and a second connecting plate part. The first connecting plate part is used to connect to the highest temperature heat source area on the circuit board. The first heat-conducting silica gel sheet is attached to the end face of the first connecting plate part close to the circuit board. The second heat-conducting silica gel sheet is attached to the end face of the second connecting plate part away from the first heat-conducting silica gel sheet. The heat-conducting plate part is bent towards the direction away from the circuit board.

[0007] In some embodiments, the base is provided with an opening, and the second heat-conducting silica gel sheet at least partially extends out of the base through the opening.

[0008] In some embodiments, two opposite sides of the second connecting plate portion are bent to form fixing ears, and the fixing ears are provided with connecting through holes, which are fixed to the base by screws passing through the connecting through holes.

[0009] In some embodiments, at least one first positioning hole is provided on the first connecting plate portion, at least one second positioning hole is provided on the two fixing ears, and a positioning column adapted to the first positioning hole and the second positioning hole is provided on the base.

[0010] In some embodiments, the opening is arranged at the bottom of the base, and an abutment plate is provided on the second connecting plate portion on the opposite side of the heat conduction plate portion and bent in the same direction as the fixing ear. The bottom inside the base is provided with connecting columns on both sides of the opening, and the abutment plate is L-shaped and abuts against the inner side of the opening. The fixing ear is also L-shaped and connected to the corresponding connecting column.

[0011] In some embodiments, the second connecting plate portion is located in the opening, and the second thermally conductive silicone sheet extends entirely out of the base at the opening.

[0012] In some embodiments, the heat conducting plate portion includes a straight plate portion and an inclined plate portion, and the second connecting plate portion, two fixing ears, the straight plate portion and the abutting plate constitute a positioning frame extending into the opening.

[0013] In some embodiments, the heat sink is formed by integrally bending a metal plate.

[0014] The beneficial effects of the present invention are as follows: In the present invention, a heat sink is added to the steering wheel switch, and at the same time, a thermally conductive silicone sheet is attached to the high-current heating component area of ​​the circuit board and connected to one end of the heat sink. The other end of the heat sink is also connected to the steering wheel heat dissipation frame through the thermally conductive silicone sheet, so that the heat inside the steering wheel switch is transferred to the outside of the steering wheel switch through the heat sink, thereby improving the stability of the electronic components, reducing the temperature of the hand-operated area of ​​the steering wheel switch, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still fall within the scope of the present invention.

[0016] Figure 1 This is an exploded view of a steering wheel switch in the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of a steering wheel switch in the present invention;

[0018] Figure 3 It is the schematic view of the heat dissipation fin in the utility model;

[0019] Figure 4 It is the schematic view of the base in the utility model;

[0020] Figure 5 It is the schematic view of the heat dissipation fin, the first heat-conducting silica gel sheet and the second heat-conducting silica gel sheet in the utility model;

[0021] Figure 6 It is the schematic view of the base, the heat dissipation fin, the first heat-conducting silica gel sheet and the second heat-conducting silica gel sheet in the utility model;

[0022] Figure 7 It is the schematic view of the steering wheel switch heat transfer in the utility model. DETAILED DESCRIPTION

[0023] The following description provides specific application scenarios and requirements of the present specification, so as to enable those skilled in the art to manufacture and use the contents of the present specification. Various local modifications of the disclosed embodiments are obvious to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of the present specification. Therefore, the present specification is not limited to the shown embodiments, but is consistent with the widest range of claims.

[0024] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0025] Secondly, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components and should not be understood as a limitation on the embodiments of the present application.

[0026] In addition, the terms "mounting", "setting", "provided with", "connection", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two devices, elements or components.

[0027] For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] Regarding the drawings of this application, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0029] Example 1:

[0030] In the prior art, a steering wheel switch includes a circuit board 1, a base 2, an upper cover 7, a button assembly 8 and a waterproof rubber ring. The base 2 and the upper cover are combined to form a shell. The circuit board 1 is arranged in the shell, and the waterproof rubber ring is arranged on the outer periphery of the circuit board 1. A manual operation area is provided on the upper cover 7, and the button assembly 8 is arranged in the manual operation area. Since the components arranged on the circuit board 1 generate heat, the heat will be transferred to the button assembly 8 in the manual operation area, generally reaching above 35°C, so that the user will obviously feel the button assembly 8 is hot during use. Current steering wheels are generally provided with a heat dissipation frame.

[0031] like Figures 1 to 7 As shown, this embodiment provides a steering wheel switch heat dissipation device, which also includes a heat sink 3, a first thermally conductive silicone sheet 4 and a second thermally conductive silicone sheet 5. One end of the heat sink 3 is connected to the heat source area with the highest temperature on the circuit board 1 through the first thermally conductive silicone sheet 4, generally selecting the area where high-current components are placed, and the other end is connected to the outside of the steering wheel switch through the second thermally conductive silicone sheet 5. Preferably, an opening 21 is provided on the base 2, and the second thermally conductive silicone sheet 5 at least partially extends out of the base 1 through the opening 21. Specifically, the opening 21 is provided at the bottom of the base 2, and the second connecting plate portion 32 is located at the opening 21. 1, and the second thermally conductive silicone sheet 5 all extends out of the base 2 at the opening 21, so as to be connected to the heat dissipation frame of the steering wheel, so that heat is transferred outward along the heat dissipation frame. Through this arrangement, a heat sink 3 is added to the steering wheel switch, and at the same time, a thermally conductive silicone sheet is attached to the high-current heating component area of ​​the circuit board 1 and connected to one end of the heat sink. The other end of the heat sink is also connected to the steering wheel heat dissipation frame through the thermally conductive silicone sheet, so that the heat inside the steering wheel switch is transferred to the outside of the steering wheel switch through the heat sink, thereby improving the stability of the electronic components, reducing the temperature of the hand-operated area of ​​the steering wheel switch, and improving the user experience.

[0032] Among them, after thermal analysis, the temperature of the area where high-current components are placed on circuit board 1 is as high as 42.9°C. When there is no heat dissipation device, the temperature of the hand-operated area is as high as 35°C-38°C. However, through the heat dissipation device, the temperature of the hand-operated area will be reduced to no more than 29.5°C, and the overall heat dissipation effect is significant.

[0033] In the embodiment of the present disclosure, the heat sink 3 includes a first connecting plate portion 30, a heat conducting plate portion 31 and a second connecting plate portion 32. The first connecting plate portion 30 is used to connect to the heat source area with the highest temperature on the circuit board 1. The first thermally conductive silicone sheet 4 is attached to the end surface of the first connecting plate portion 30 close to the circuit board 1, and the second thermally conductive silicone sheet 5 is attached to the end surface of the second connecting plate portion 32 away from the first thermally conductive silicone sheet 4. The heat conducting plate portion 31 is bent in a direction away from the circuit board 1, so that the heat is away from the circuit board 1, ensuring the stability of the components on the circuit board 1 and reducing the temperature of the steering wheel switch manual operation area. Secondly, the use of thermally conductive silicone sheet not only effectively improves the heat transfer efficiency, but also plays the role of insulation and shock absorption. In addition, the thermally conductive silicone sheet has natural stickiness on both sides, and has strong operability and maintainability, and can avoid the problem of air gap hindering heat transfer when the circuit board 1 is directly connected to the first connecting plate portion 30.

[0034] In the embodiment of the present disclosure, two opposite sides of the second connecting plate portion 32 are bent to form fixing ears 33, and a connecting through hole 330 is provided on the fixing ear 33. The fixing ear 33 is fixed to the base 2 by screws passing through the connecting through hole 330, so that the heat sink 3 and the base 2 are firmly and reliably fixed.

[0035] Optionally, at least one first positioning hole 300 is provided on the first connecting plate portion 30, at least one second positioning hole 331 is provided on the two fixing ears 33, and a positioning column 20 is provided on the base 2, which is adapted to the first positioning hole 300 and the second positioning hole 331, so as to facilitate the rapid installation of the heat sink 3 and improve the stability of the heat sink 3 in the steering wheel switch.

[0036] In the embodiment of the present disclosure, an abutment plate 34 is provided on the second connecting plate portion 32 on the opposite side of the heat conducting plate portion 31 and bent in the same direction as the fixing ear 33. The bottom of the base 2 is located on both sides of the opening 21 and is provided with connecting columns 22. The abutment plate 34 is L-shaped and abuts the inner side of the opening 21. The fixing ear 33 is also L-shaped and connected to the corresponding connecting column 22 to facilitate connection with the steering wheel heat dissipation frame. The heat conducting plate portion 31 includes a straight plate portion 310 and an inclined plate portion 311. The second connecting plate portion 32, the two fixing ears 33, the straight plate portion 310 and the abutment plate 34 constitute a positioning frame 6 extending into the opening 21. Through this arrangement, the abutment plate 34 can be deformed in the opening 21, which not only ensures the stability of the heat sink 3 in the steering wheel switch, but also improves the shock resistance and installation convenience of the heat sink 3.

[0037] Preferably, the heat sink 3 is formed by integrally bending a metal plate, which improves processing efficiency. The metal plate is made of copper, copper alloy, silver, silver alloy or other materials with excellent thermal conductivity, and generally has a thickness of 0.5 mm to 1.2 mm.

[0038] In view of the foregoing, it will be seen that the foregoing detailed description of the application is only illustrative in nature and not limiting. Although specific reference can be made to the examples contained herein, this has been done for illustrative purposes only, and is not intended to limit the application of the application in any way. Other ways of implementing the application will be apparent to those skilled in the art in view of the foregoing detailed description of the application. Accordingly, the true spirit and scope of the application is indicated by the appended claims, rather than by the foregoing description; and changes can be made to the details of the application without departing from the application as defined by the claims. Although there has been described above what are considered to be preferred embodiments of the present application, various modifications, alterations, and improvements will readily occur to those skilled in the art. It is the intention, therefore, to include all such modifications, alterations, and improvements within the scope of the present application. Accordingly, the application is not to be restricted, except in the spirit or scope of the appended claims.

[0039] Furthermore, it is to be understood that the application can be carried out by specifically designed apparatus, equipment and / or software operating in system software and / or on a data processing apparatus to perform the various processes and steps described herein. The application can be implemented by computer software stored in computer readable media and executable by the data processing apparatus. The application can also be implemented as a computer program product comprising a computer usable medium having a computer readable program coding therein.

[0040] Finally, it should be understood that the application as described herein is susceptible to numerous modifications, adaptations and variations. Specific examples of embodiments of the application have been described herein in an illustrative sense and it will be recognized that the application described herein can be adapted for various applications and carried out in a variety of embodiments. Accordingly, the application is intended to embrace all such alterations, modifications and variations that fall within the scope of this application. More generally, the application embraces all alternatives, modifications, and variations of the application that are within the scope of the appended claims.

Claims

1. A steering wheel switch heat dissipation device, comprising a circuit board (1) and a base (2), characterized in that: It also includes a heat sink (3), a first heat-conducting silicone sheet (4) and a second heat-conducting silicone sheet (5), one end of the heat sink (3) is connected to the heat source area with the highest temperature on the circuit board (1) through the first heat-conducting silicone sheet (4), and the other end is connected to the outside of the steering wheel switch through the second heat-conducting silicone sheet (5).

2. A steering wheel switch heat dissipation device according to claim 1, characterized in that: The heat sink (3) comprises a first connecting plate portion (30), a heat conducting plate portion (31) and a second connecting plate portion (32); the first connecting plate portion (30) is used to connect to the heat source area with the highest temperature on the circuit board (1); the first heat conducting silicone sheet (4) is attached to the end surface of the first connecting plate portion (30) close to the circuit board (1); the second heat conducting silicone sheet (5) is attached to the end surface of the second connecting plate portion (32) away from the first heat conducting silicone sheet (4); and the heat conducting plate portion (31) is bent in a direction away from the circuit board (1).

3. The steering wheel switch heat dissipation device according to claim 2, characterized in that: An opening (21) is provided on the base (2), and the second heat-conducting silicone sheet (5) at least partially extends out of the base (2) through the opening (21).

4. The steering wheel switch heat dissipation device according to claim 3, characterized in that: Two opposite sides of the second connecting plate portion (32) are bent to form fixing ears (33), and the fixing ears (33) are provided with connecting through holes (330) and are fixed to the base (2) by screws passing through the connecting through holes (330).

5. The steering wheel switch heat dissipation device according to claim 4, characterized in that: At least one first positioning hole (300) is provided on the first connecting plate portion (30), at least one second positioning hole (331) is provided on the two fixing ears (33), and a positioning column (20) adapted to the first positioning hole (300) and the second positioning hole (331) is provided on the base (2).

6. The steering wheel switch heat dissipation device according to claim 4, characterized in that: The opening (21) is provided at the bottom of the base (2); an abutment plate (34) is provided on the second connecting plate portion (32) on the opposite side of the heat conducting plate portion (31) and is bent in the same direction as the fixing ear (33); a connecting column (22) is provided at the bottom of the base (2) on both sides of the opening (21); the abutment plate (34) is L-shaped and abuts against the inner side of the opening (21); and the fixing ear (33) is also L-shaped and is connected to the corresponding connecting column (22).

7. The steering wheel switch heat dissipation device according to claim 6, characterized in that: The second connecting plate portion (32) is located in the opening (21), and the second thermally conductive silicone sheet (5) extends entirely out of the base (2) at the opening (21).

8. The steering wheel switch heat dissipation device according to claim 6, characterized in that: The heat conducting plate portion (31) comprises a straight plate portion (310) and an inclined plate portion (311), and the second connecting plate portion (32), two fixing ears (33), the straight plate portion (310) and the abutting plate (34) form a positioning frame (6) extending into the opening (21).

9. A steering wheel switch heat dissipation device according to any one of claims 1 to 8, characterized in that: The heat sink (3) is formed by integrally bending a metal plate.

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