Vehicle-mounted terminal
By designing a combination of a zigzag-shaped heat dissipation boss and a thermal paste with a zigzag surface in the vehicle terminal, the problem of insufficient contact area between the heat dissipation boss and the thermal paste is solved, efficient heat dissipation in a limited space is achieved, and the safety of heating components is protected.
Patent Information
- Application Number
- CN202421978230.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-15
AI Technical Summary
In the existing heat dissipation structure of vehicle terminals, the contact area between the heat dissipation boss and the thermal conduction patch is limited, resulting in poor heat dissipation effect and it is difficult to further improve the heat dissipation efficiency in a limited space.
A heat dissipation boss with a zigzag surface is designed, and the first surface of the thermally conductive patch is embedded through the teeth to form a tooth-shaped abutment surface, increasing the contact area, and maintaining a safe distance between the thermally conductive patch and the heating components to avoid damage.
In a narrow space, the contact area is effectively increased, the heat dissipation efficiency is improved, and damage to the heating components is avoided, achieving a more efficient heat dissipation effect.
Smart Images
Figure CN223080343U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automotive parts, in particular to an in-vehicle terminal of an automobile. Background Art
[0002] Currently, with the continuous increase in the functional requirements of in-vehicle terminals such as T-BOX, the computing power requirements for chips are also getting higher and higher, and the chip power consumption also increases accordingly.
[0003] In order to achieve the purpose of cooling the chip, on the premise of considering the lightweight requirement, a heat dissipation structure of a heat conduction sticker and a heat dissipation boss is generally adopted. The heat dissipation boss is arranged on the shell, the heat conduction sticker is located between the chip surface and the heat dissipation boss, and the heat dissipation boss compresses the heat conduction sticker to make the three closely contact, so that the heat generated during the operation of the chip is transferred to the heat dissipation boss through the heat conduction sticker, and then the heat is further diffused to the outside by the heat dissipation boss. Since the surface of the heat dissipation boss in contact with the heat conduction sticker is a plane, and the two are in surface-to-surface contact for heat dissipation, the contact area between the heat dissipation boss and the heat conduction sticker of this heat dissipation structure is relatively limited.
[0004] Therefore, how to further improve the heat dissipation effect in a limited space is a technical problem that needs to be solved. Summary of the Utility Model
[0005] The purpose of the utility model is to provide an in-vehicle terminal to solve the above technical problems.
[0006] To achieve the above purpose, an in-vehicle terminal provided by the utility model includes a shell, a circuit board located inside the shell, and a heat-generating component arranged on the circuit board;
[0007] The shell is provided with a heat dissipation boss protruding inward, a heat conduction sticker is arranged between the heat-generating component and the heat dissipation boss, the heat conduction sticker has a first surface and a second surface, the first surface faces the surface of the heat dissipation boss, and the second surface is attached to the surface of the heat-generating component;
[0008] The surface of the heat dissipation boss facing the first surface is provided with teeth, and the teeth are embedded in the first surface of the heat conduction sticker, so that the heat dissipation boss forms a toothed contact surface with the heat conduction sticker through the teeth.
[0009] Optionally, there is a gap between the tooth top of the teeth and the second surface of the heat conduction sticker.
[0010] Optionally, there is a gap between the part of the first surface of the heat conduction sticker that is deformed by extrusion and embedded between the teeth and the tooth root of the teeth.
[0011] Optionally, the tooth top of the teeth is a plane or a curved surface.
[0012] Optionally, the tooth portion is a trapezoidal tooth portion with a flat top; or, the tooth portion is a trapezoidal tooth portion with a curved top; or, the tooth portion is a sinusoidal waveform.
[0013] Optionally, the height of the tooth portion is less than or equal to the distance L between the tooth top of the tooth portion and the second surface of the thermal conductive paste.
[0014] Optionally, the heat dissipation boss is separately connected to the shell, or the heat dissipation boss is integrally connected to the shell.
[0015] Optionally, a concave cavity is provided on a side of the heat dissipation boss facing away from the heat-generating component, a plurality of parallel heat dissipation ribs are provided in the concave cavity, and heat dissipation grooves are formed between the heat dissipation ribs.
[0016] Optionally, the tooth top spacing of the tooth portion is 0.5 mm to 1.5 mm.
[0017] Optionally, the heat-generating component includes a chip.
[0018] The vehicle-mounted terminal provided by the utility model has a surface of a heat dissipation boss that is sawtooth-shaped in cross section. After assembly, the heat-generating components, the thermal conductive paste and the heat dissipation boss are stacked on each other. Since the thermal conductive paste has a certain flexibility, after being squeezed by the teeth of the heat dissipation boss, the teeth of the heat dissipation boss can be embedded in the first surface of the thermal conductive paste, so that the plane for heat dissipation between the two is changed from the original plane to the surface area of several teeth, thereby effectively increasing the contact area in a limited and narrow space and improving the heat dissipation efficiency.
[0019] Furthermore, since there is a gap between the top of the tooth portion and the second surface of the thermal paste, the tooth portion of the heat dissipation boss will not penetrate the thermal paste, thereby preventing the tooth portion from directly contacting the heat-generating components and damaging the heat-generating components. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A cross-sectional view of a vehicle-mounted terminal provided in an embodiment of the utility model;
[0021] Figure 2 for Figure 1 An exploded schematic diagram of the cooperation between the heat dissipation boss, the thermal conductive pad and the chip shown in FIG.
[0022] Figure 3 for Figure 1 Schematic diagram showing the comparison of the areas of the heat dissipation ribs and the thermal conductive pad;
[0023] Figure 4 It is a schematic diagram of the structure of the heat dissipation boss in an "L" shape;
[0024] Figure 5 for Figure 4Schematic diagram of the area comparison between the heat dissipation boss and the thermal conductive sticker shown in
[0025] Figure 6 Schematic diagram of the structure where the tooth part with a trapezoidal cross-section is embedded in the thermal conductive sticker;
[0026] Figure 7 Schematic diagram of the structure where the tooth part with a sinusoidal waveform cross-section is embedded in the thermal conductive sticker;
[0027] Figure 8 Schematic diagram of the structure where the tooth part with a trapezoidal cross-section with a smooth transition at the top is embedded in the thermal conductive sticker.
[0028] In the figure:
[0029] 10. Housing 20. Circuit board 30. Heat-generating component 40. Heat dissipation boss 41. Tooth part 42. Heat dissipation rib 43. Heat dissipation groove 50. Thermal conductive sticker;
[0030] a. First surface b. Second surface S1. Area of the thermal conductive sticker S2. Area of the heat dissipation boss. Detailed implementation manners
[0031] To enable those skilled in the art to better understand the solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners.
[0032] In this article, terms such as "upper, lower, inner, outer" are established based on the positional relationship shown in the accompanying drawings. Depending on the different accompanying drawings, the corresponding positional relationship may also change accordingly. Therefore, it cannot be understood as an absolute limitation of the protection scope; moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.
[0033] Please refer to Figure 1 、 Figure 2 、 Figure 3 , Figure 1 A cross-sectional view of a vehicle-mounted terminal provided by an embodiment of the present utility model; Figure 2 For Figure 1 Schematic exploded view of the cooperation between the heat dissipation boss, the thermal conductive sticker and the chip shown in Figure 3 For Figure 1 Schematic diagram of the area comparison between the heat dissipation rib and the thermal conductive sticker shown in
[0034] As shown in the figure, in a specific embodiment, the in-vehicle terminal provided by the present utility model can be an in-vehicle multimedia host, an intelligent driving controller, an in-vehicle T-BOX, etc. It has a housing 10 and a circuit board 20 located inside the housing 10. A heat-generating component 30 that dissipates heat during operation, such as a chip, etc., is provided on the circuit board 20.
[0035] In order to dissipate heat from the heat-generating components 30 such as chips, the housing 10 is provided with a heat dissipation boss 40 protruding inward. A heat-conducting paste 50 is provided between the heat-generating component 30 and the heat dissipation boss 40. The heat-conducting paste 50 is used to transfer the heat of the heat-generating component 30 to the heat dissipation boss 40. The heat-conducting paste 50 has a first surface a and a second surface b. Among them, the first surface a is the upper surface shown in the figure, and the second surface b is the lower surface shown in the figure. During assembly, the heat-generating component 30, the heat-conducting paste 50, and the heat dissipation boss 40 are stacked on top of each other. The heat-conducting paste 50 is attached to the lower surface of the heat dissipation boss 40 through the first surface a and is attached to the upper surface of the heat-generating component 30 through the second surface b.
[0036] The lower surface of the heat dissipation boss 40 is serrated in cross-section, and its tooth part 41 is embedded in the first surface a of the heat-conducting paste 50. There is a spacing L between the tooth top of the tooth part 41 and the second surface b of the heat-conducting paste. After the first surface a of the heat-conducting paste 50 is squeezed by the tooth part 41, it deforms and is embedded between the tooth parts 41.
[0037] Since the heat-conducting paste 50 has a certain flexibility, after being squeezed by the tooth part 41 of the heat dissipation boss 40, the tooth part 41 of the heat dissipation boss 40 can be embedded in the first surface a of the heat-conducting paste 50, so that the contact heat dissipation plane between the two changes from the original plane to a tooth-shaped abutting surface, thereby effectively increasing the contact area and improving the heat dissipation efficiency in a limited and narrow space; at the same time, since there is a spacing between the tooth top of the tooth part 41 and the second surface b of the heat-conducting paste 50, the tooth part of the heat dissipation boss will not penetrate the heat-conducting paste 50, thus avoiding the tooth part 41 directly contacting the heat-generating component 30 and not causing damage to the heat-generating component 30.
[0038] There is a spacing between the part of the first surface a of the heat-conducting paste 50 that is embedded between the tooth parts 41 after being squeezed by the tooth part 41 and the tooth root of the tooth part 41, so as to avoid the risk of the heat-conducting paste 50 being over-deformed after being squeezed and causing the heat-conducting paste 50 to fail while increasing the contact area and improving the heat dissipation efficiency.
[0039] The heat dissipation boss 40 can be made of a metal material to facilitate better heat dissipation by utilizing excellent heat conduction characteristics. Specifically, the heat dissipation boss 40 can be separately processed and formed, and then installed in the frame opening area reserved on the housing 10, thus becoming a part of the housing 10. If such a structure is adopted, the housing 10 can be made of a metal material or other materials such as plastic.
[0040] Alternatively, the heat dissipation boss 40 can also be integrally formed with the housing 10. If such a structure is adopted, the housing 10 can be made of a metal material. In this way, not only can the heat dissipation boss 40 dissipate heat by itself, but the heat dissipation boss 40 can also transfer heat to the housing 10, and the metal housing 10 is used to dissipate heat together, further improving the heat dissipation effect.
[0041] In this embodiment, a concave cavity is provided on the back surface of the heat dissipation boss 40, and a plurality of parallel heat dissipation ribs 42 are provided in the inner cavity. Heat dissipation grooves 43 are formed between adjacent heat dissipation ribs 42, thereby effectively increasing the heat dissipation area. During use, the chip generates a large amount of heat due to high-speed operation. The heat generated is first transferred to the thermal paste 50, then transferred from the thermal paste 50 to the heat dissipation boss 40, and then transferred from the heat dissipation boss 40 to the outside through the external surface, heat dissipation ribs 42, heat dissipation grooves 43 and other parts, thereby realizing the heat dissipation and cooling effect of the chip and ensuring that the chip can operate stably at a safe temperature.
[0042] In the above embodiment, the chip as the heat generating component 30 is rectangular in shape, and the heat dissipation boss 40 and the thermal paste 50 are also rectangular in shape. The area S1 of the thermal paste 50 is equal to the area of the heat generating component 30. Moreover, the area S1 of the thermal paste 50 is greater than (or equal to) the area S2 of the lower surface of the heat dissipation boss 40. When observed from the top view, the edge contour of the heat dissipation boss 40 is located at a position offset inward from the edge contour of the thermal paste 50, so that the thermal paste 50 can fully cover the heat generating component 30, avoiding heat dissipation dead spots, and at the same time ensuring that all the tooth parts 41 of the heat dissipation boss 40 can be embedded in the first surface a of the thermal paste 50, thereby better conducting the heat dissipated from the upper surface of the heat generating component 30 to the heat dissipation boss 40.
[0043] It can be understood that according to the different shapes of the heat generating component 30, the shape of the thermal paste 50 can also be different. For example, in another embodiment, the chip is in an "L" shape, then the shape of the thermal paste 50 can also be "L" shape (see Figure 4 、 Figure 5 ). The area S1 of the "L" - shaped thermal paste 50 is equal to the area of the heat generating component 30. Moreover, the area S1 of the "L" - shaped thermal paste 50 is greater than (or equal to) the area S2 of the lower surface of the "L" - shaped heat dissipation boss 40. When observed from the top view, the edge contour of the "L" - shaped heat dissipation boss 40 is located at a position offset inward from the edge contour of the "L" - shaped thermal paste 50.
[0044] Please refer to Figures 6 to 8 , Figure 6 for the structural schematic diagram of the tooth part with a trapezoidal cross - section embedded in the thermal paste; Figure 7 for the structural schematic diagram of the tooth part with a sinusoidal cross - section embedded in the thermal paste;Figure 8 It is a schematic structural view of a tooth part with a trapezoidal cross-section having a smoothly transitioned top being embedded in a heat-conducting sticker.
[0045] As shown in the figure, the cross-sectional width of the tooth part 41 of the heat dissipation boss 40 gradually increases from the top to the root, and the top of the tooth part 41 is a plane or a curved surface, avoiding sharp corners from damaging the heat-conducting sticker 50 and the heat-generating component 30. On the basis of increasing the heat dissipation area, the heat-conducting sticker 50 and the heat-generating component 30 are protected.
[0046] For example, the cross-section of the tooth part 41 is a trapezoid with a flat top (see Figure 6 ); or, the cross-section of the tooth part 41 is a trapezoid with a curved surface at the top (see Figure 7 ); or, the cross-section of the tooth part 41 is a sine wave shape (see Figure 8 ).
[0047] The tooth top pitch of the tooth part 41 is 0.5 mm to 1.5 mm, and the height of the tooth part 41 is less than or equal to the distance L between the tooth top of the tooth part 41 and the second surface b of the heat-conducting sticker 50. In this way, while the heat-conducting sticker 50 has a large deformation amount, it can maintain a certain supporting performance, so that it is not easy to affect other components.
[0048] The above embodiments are only the preferred solutions of the present utility model, and are not specifically limited thereto. On this basis, targeted adjustments can be made according to actual needs to obtain different implementation manners. For example, if the shape of the heat-generating component 30 changes, the shape of the heat-conducting sticker 50 can be adaptively adjusted accordingly, and so on. Since there are many possible implementation manners, they will not be exemplified one by one here.
[0049] The present utility model solves the problem of insufficient heat dissipation due to the flat contact between the heat-conducting sticker 50 and the heat dissipation boss 40. Due to the re-design of the structure of the heat dissipation boss 40, the traditional flat heat dissipation boss 40 is designed into a heat dissipation boss 40 with a serrated surface. After the first surface a of the heat-conducting sticker 50 is squeezed by the tooth part 41 of the heat dissipation boss 40, the tooth part 41 can be embedded in the first surface a of the heat-conducting sticker 50, so that the plane for contact heat dissipation between the two changes from the original plane to the surface areas of several tooth parts, thereby effectively increasing the contact area and improving the heat dissipation effect in a limited and narrow space; at the same time, since there is a distance L between the tooth top of the tooth part 41 and the second surface b of the heat-conducting sticker 50, the tooth part of the heat dissipation boss will not penetrate the heat-conducting sticker 50, thus avoiding the tooth part 41 directly contacting the heat-generating component 30 and not damaging the heat-generating component 30.
[0050] The above has introduced the vehicle-mounted terminal provided by the present utility model in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the core idea of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.
Claims
1. A vehicle-mounted terminal, characterized in that, It includes a housing (10), a circuit board (20) located inside the housing (10), and a heating component (30) provided on the circuit board (20); The housing (10) is provided with a heat dissipation boss (40) protruding inward. A heat conduction sticker (50) is provided between the heating component (30) and the heat dissipation boss (40). The heat conduction sticker (50) has a first surface (a) and a second surface (b). The first surface (a) faces the surface of the heat dissipation boss (40), and the second surface (b) is attached to the surface of the heating component (30); The surface of the heat dissipation boss (40) facing the first surface (a) is provided with teeth. The teeth (41) are embedded in the first surface (a) of the heat conduction sticker (50), so that the heat dissipation boss (40) forms a toothed contact surface with the heat conduction sticker (50) through the teeth (41).
2. The vehicle-mounted terminal according to claim 1, wherein There is a gap between the tooth tip of the teeth (41) and the second surface (b) of the heat conduction sticker (50).
3. The vehicle-mounted terminal according to claim 1, characterized in that, There is a gap between the part of the first surface (a) of the heat conduction sticker (50) that is deformed by extrusion and embedded between the teeth (41) and the tooth root of the teeth (41).
4. The vehicle-mounted terminal according to claim 1, characterized in that, The tooth tip of the teeth (41) is a plane or a curved surface.
5. The vehicle-mounted terminal according to claim 4, characterized in that, The teeth (41) are trapezoidal teeth with a flat tooth tip; or, the teeth (41) are trapezoidal teeth with a curved tooth tip; or, the teeth (41) are in a sine wave shape.
6. The vehicle-mounted terminal according to claim 1, characterized in that, The height of the teeth (41) is less than or equal to the gap L between the tooth tip of the teeth (41) and the second surface (b) of the heat conduction sticker (50).
7. The vehicle-mounted terminal according to claim 6, characterized in that, The heat dissipation boss (40) is detachably connected to the housing (10), or the heat dissipation boss (40) is integrally formed and connected to the housing (10).
8. The vehicle-mounted terminal according to claim 7, wherein A concave cavity is provided on the side of the heat dissipation boss (40) facing away from the heating component (30). A plurality of parallel heat dissipation ribs (42) are provided in the concave cavity, and heat dissipation grooves (43) are formed between the heat dissipation ribs (42).
9. The vehicle-mounted terminal according to any one of claims 1 to 8, characterized in that, The tooth tip pitch of the teeth (41) is 0.5 mm to 1.5 mm.
10. The vehicle-mounted terminal according to claim 9, wherein The heating component (30) includes a chip.