Heat dissipation device with fixing function

Abstract

The utility model provides a heat dissipation device with a fixing function, which is composed of a heat dissipation sheet body and a clamping elastic sheet which are integrally formed, and the heat dissipation sheet body comprises a body part and a contact part; one surface, facing the clamping elastic sheet, of the contact part is a contact surface; the heating body is tightly attached to the contact face of the contact part through the clamping elastic piece. An additional auxiliary structure is not needed, assembling procedures are reduced, the number of parts is reduced, assembling efficiency is improved, and therefore cost is reduced.

Description

Technical Field

[0001] The utility model relates to the fields of in - vehicle or household inverters and chargers, and heat dissipation technology, and particularly relates to a heat dissipation device with a fixing function. Background Art

[0002] During the operation of the field - effect transistors integrated in the inverter and charger, a large amount of heat will be generated. Therefore, effective heat dissipation measures are required to ensure the normal operation of the device and extend its service life. Currently, as the main heat dissipation component, the connection and fixing method between the heat sink and the field - effect transistor plays a crucial role in the design of electronic products. However, the existing fixing methods have certain limitations.

[0003] Screw fixing method: As Figure 1 shown, by using the pre - set holes on the upper part of the field - effect transistor, passing through the screws and cooperating with nuts, the field - effect transistor is pressed tightly on the heat sink. Although this method can effectively fix the field - effect transistor, the installation process is relatively complex, requiring the cooperation of multiple components, which increases the assembly difficulty and cost.

[0004] Press - block fixing method: As Figure 2 shown, a press - block is used to press the field - effect transistor, and then it is fastened to the heat sink through screws and nuts. This method also achieves the fixing effect. However, due to the need for additional press - blocks and corresponding fasteners, the entire installation process becomes more cumbersome, and the increase in the number of components leads to an increase in cost.

[0005] In addition, the existing technology also uses elastic - piece fixing methods for power - transistor chips, etc.

[0006] For example, in Patent 1 (CN201520946114.5, aluminum - alloy buckle - clamped heat sink), the clamping plate is located below the edge of the transverse plate away from the card slot, and its upper end is connected to the edge of this side of the transverse plate through an elastic piece. The lower section of the clamping plate is an arc - shaped plate. The elastic clamp is composed of a horizontal elastic piece and a vertical elastic piece, and the whole is in the shape of a "7". The edge of the horizontal elastic piece is provided with a bent edge clamped in the card slot, and the lower edge of the vertical elastic piece is provided with a hook clamped on the reverse teeth. Since the clamping force of the arc - shaped plate is not strong, an additional elastic clamp is required to cooperate to complete the clamping of the device, and the elastic clamp increases the complexity and cost.

[0007] For another example, Patent 2 (CN201510801903.4, elastic clip clamped aluminum alloy heat sink) includes an aluminum alloy main body and an elastic clip. The clamping plate is located below the horizontal plate, and its upper end is connected to the side of the horizontal plate away from the back plate through a corrugated elastic sheet. The lower section of the clamping plate is an arc-shaped plate. Limiting grooves parallel to the arc center axis of the arc-shaped plate are respectively provided on one side of the arc center of the arc-shaped plate and the back of the back plate. The elastic clip is a U-shaped clip, and the two clamping ends of the U-shaped clip are respectively fitted into the two limiting grooves. The clamping force of the clamping plate of the heat sink in Patent 2 is not strong, and it is still necessary to cooperate with an additional elastic clip to complete the clamping of the device, which increases the complexity and cost.

[0008] For another example, Patent 3 (CN201610858900.9, heat dissipation device, power processing device and manufacturing method thereof). The clamping device includes an elastic sheet and a plug pin. The heat dissipation block includes a contact block and a heat dissipation substrate connected perpendicular to each other. The elastic sheet and the plug pin are both inserted into the insertion through holes from top to bottom. The clamping elastic sheet in Patent 3 needs to be fixed through the plug pin and the heat dissipation substrate, which increases the complexity and the manufacturing cost of the device.

[0009] For another example, Patent 4 (CN201520917481.2, self-tapping clamped aluminum alloy heat sink) includes an aluminum alloy main body and a fastening screw. The aluminum alloy main body is provided with a back plate, a horizontal plate, and an upper wing plate. The upper end of the clamping plate is connected to the edge of the horizontal plate on this side through an elastic sheet with a folded cross-section. The lower section of the clamping plate is an arc-shaped plate. The screw is screwed into the groove between the two parallel plates, and the thread engages with the rib to pull the clamping plate towards the back plate. In Patent 4, an additional screw is required, which also increases the complexity and the manufacturing cost of the device.

[0010] For another example, Patent 5 (CN201520932255.1, expansion type clamped aluminum alloy heat sink) includes an aluminum alloy main body, an expansion strip, and an expansion screw. The clamping plate is located on the front of the back plate and is placed parallel to the back plate. The lower part of the clamping plate is connected with an arc-shaped plate. In Patent 5, an additional screw is also required, which also increases the complexity and the manufacturing cost of the device.

[0011] In summary, the existing fixing methods between the field effect transistor and the heat sink generally have problems such as complicated installation procedures, many required parts, and high costs. There is an urgent need for a new fixing solution to solve these problems. Utility Model Content

[0012] Based on the above problems, the present utility model provides a heat dissipation device with a fixing function to solve the technical problems such as complex heat dissipation and high cost in the prior art.

[0013] A heat dissipation device with a fixing function is composed of an integrally formed heat sink body and a clamping elastic sheet. The heat sink body includes a main body part and a contact part;

[0014] The surface of the contact part facing the clamping elastic sheet is the contact surface;

[0015] The clamping spring piece presses the heating element tightly against the contact surface of the contact part.

[0016] Furthermore, the clamping spring piece is in a zigzag shape.

[0017] Furthermore, the main body part is bent into a first horizontal part and a first vertical part, and the first horizontal part and the first vertical part are arc-connected.

[0018] Furthermore, a first block is dug out from the main body part and bent to form a second horizontal part and a second vertical part. The second vertical part forms the contact part. The upper end of the contact part is integrally connected to the first horizontal part, the lower end of the contact part is integrally connected to one end of the second horizontal part, and the other end of the second horizontal part is integrally connected to the first vertical part.

[0019] Furthermore, the clamping spring piece is formed by digging out a second block from the first horizontal part and bending it downward.

[0020] Furthermore, the starting section of the clamping spring piece connected to the first horizontal part is a guiding inclined surface.

[0021] Furthermore, the distance between the connection point of the clamping spring piece connected to the first horizontal part and the contact surface of the contact part is less than the thickness of the clamped part of the heating element.

[0022] Furthermore, at least one of the first horizontal part and the first vertical part has heat dissipation holes.

[0023] Furthermore, a third block is dug out from the side of the second horizontal part and vertically extended to form a first support leg, and the first support leg is integrally connected to the lower end of the contact part.

[0024] Furthermore, two second support legs are integrally connected to the lower end of the first vertical part, and the lower ends of the second support legs are horizontally flush with the lower end of the first support leg.

[0025] The beneficial technical effect of the present utility model lies in that: through appropriate design, the present utility model integrally designs the heat dissipation body and the clamping spring piece to dissipate heat from the heating element while clamping the heating element with elastic force. Due to the integral design, no additional auxiliary structure is required. The structure of the heat dissipation device itself is simple and not complex, and the elastic clamping operation of the heating element is also more simplified, reducing the cost. Description of the Drawings

[0026] Figure 1-2 It is the way of clamping a field effect transistor by a heat sink in the prior art;

[0027] Figure 3 It is an exploded schematic view of a heat dissipation device with a fixing function of the present utility model;

[0028] Figure 4Schematic diagram of a heat dissipation device with a fixing function for clamping a heating element according to the present utility model.

[0029] Among them,

[0030] 1'-Heat sink; 2'-Screw; 3'-Field effect transistor; 4'-Nut; 5'-Pressing block;

[0031] 1-Clamping spring piece; 2-Body part; 3-Contact part; 4-Heating element; 21-First horizontal part; 22-Second horizontal part; 23-Second horizontal part; 24-Radiating holes; 25-Second support leg; 31-First support leg; 11-Starting section; 12-Joint point. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0033] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0034] Next, the present utility model will be further described in conjunction with the accompanying drawings and specific embodiments, but it is not a limitation of the present utility model.

[0035] See Figure 3 and Figure 4 , the present utility model provides a heat dissipation device with a fixing function, which is composed of an integrally formed heat sink body and a clamping spring piece (1). The heat sink body includes a body part (2) and a contact part (3);

[0036] The surface of the contact part (3) facing the clamping spring piece (1) is the contact surface;

[0037] The clamping spring piece (1) presses the heating element (4) tightly against the contact surface of the contact part (3).

[0038] The clamping spring piece (1) and the heat sink body are integrally formed directly. By reasonably designing the clamping spring piece (1), the heating element can be clamped on the contact part (3) only by using the clamping spring piece (1), without additional auxiliary structures, reducing the assembly process, reducing the number of parts, improving the assembly efficiency and thus reducing the cost.

[0039] The specific heating element is a field effect transistor.

[0040] Furthermore, the clamping spring piece (1) is in a zigzag shape.

[0041] Further, the body part (2) is bent into a first horizontal part (21) and a first vertical part (22), and the first horizontal part (21) and the first vertical part (22) are arc-connected.

[0042] Further, a first block is dug out from the body part (2) and bent to form a second horizontal part (23) and a second vertical part. The second vertical part forms a contact part (3). The upper end of the contact part (3) is integrally connected to the first horizontal part (21), the lower end of the contact part (3) is integrally connected to one end of the second horizontal part (23), and the other end of the second horizontal part (23) is integrally connected to the first vertical part (22).

[0043] The contact part is formed by digging out an area from a single heat dissipation plate. The process is simple, and the structure of the heat dissipation device itself is simple and not complex, reducing the manufacturing cost. The first horizontal part (21), the first vertical part (22), the second horizontal part (23), and the contact part (3) enclose a rectangular shape. The second horizontal part (23) provides a horizontal supporting force for the contact part (3), maintaining the firm stability of the contact part (3), and preventing the contact part (3) from swaying backward when clamping the heating element, which affects the clamping effect.

[0044] Further, the clamping elastic piece (1) is formed by digging out a second block from the first horizontal part (21) and bending it downward.

[0045] The downward bending makes the clamping elastic piece (1) have a zigzag bending structure from top to bottom, which is exactly opposite to the contact surface of the vertical contact part.

[0046] Further, the starting section (11) where the clamping elastic piece (1) is connected to the first horizontal part (21) is a guiding inclined surface.

[0047] After passing through the guiding inclined surface, a zigzag elastic section is formed, improving the clamping force of the clamping elastic piece. There is no need for additional auxiliary structures to improve the clamping force. During the process of sleeving the heat dissipation fin from top to bottom onto the heating element, the guiding inclined surface also prevents the two from being stuck together. During the process of sleeving down onto the field effect transistor, the "zigzag" structure will be pushed outwards, and correspondingly, there will be a reaction force on the heating element, tightly pressing it against the heat dissipation fin. This installation method does not require other parts such as screws, and the assembly is simple. Further, the distance between the connection point (12) where the clamping elastic piece (1) is connected to the first horizontal part (21) and the contact surface of the contact part (3) is less than the thickness of the clamped part of the heating element.

[0048] The distance between the connection point (12) where the clamping elastic piece (1) is connected to the first horizontal part (21) and the contact surface of the contact part (3) is slightly less than the thickness of the clamped part of the heating element, which helps to improve the clamping force of the clamping elastic piece and clamp the heating element on the contact part. Further, at least one of the first horizontal part (21) and the first vertical part (22) has a heat dissipation hole (24).

[0049] A number of heat dissipation hole arrays are arranged.

[0050] Further, a first support leg (31) is formed after vertically extending from the side of the second horizontal portion (23), and the first support leg (31) is integrally connected to the lower end of the contact portion (3).

[0051] Further, two second support legs (25) are integrally connected to the lower end of the first vertical portion (22), and the lower ends of the second support legs (25) are horizontally flush with the lower end of the first support leg (31).

[0052] The design of the support legs can keep a certain distance space between the heat dissipation device and the devices or other platforms below during application, which is convenient for operation.

[0053] Through appropriate design, the present utility model integrally designs the heat dissipation body and the clamping spring piece to dissipate heat from the heating body and at the same time clamp the heating body with elastic force. Because of the integral design, no additional auxiliary structure is required. The structure of the heat dissipation device itself is simple and not complex, and the elastic clamping operation of the heating body is also more simplified, reducing the cost.

[0054] The above are only the preferred embodiments of the present utility model, and do not limit the implementation manners and protection scope of the present utility model. For those skilled in the art, it should be realized that all equivalent replacements and obvious changes made by using the description and illustrations of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A heat dissipation device with a fixed function, characterized in that, It is composed of an integrally formed heat sink body and a clamping spring piece. The heat sink body includes a main body part and a contact part; One side of the contact part facing the clamping spring piece is a contact surface; The clamping spring piece tightly attaches the heating element to the contact surface of the contact part.

2. The heat dissipation device with a fixing function according to claim 1, wherein, The clamping spring piece is in a zigzag shape.

3. The heat dissipation device with a fixed function according to claim 1, characterized in that, The main body part is bent into a first horizontal part and a first vertical part, and the first horizontal part and the first vertical part are arc-connected.

4. The heat dissipation device with a fixed function according to claim 3, characterized in that, A first block is dug out from the main body part and bent to form a second horizontal part and a second vertical part. The second vertical part forms the contact part. The upper end of the contact part is integrally connected to the first horizontal part, the lower end of the contact part is integrally connected to one end of the second horizontal part, and the other end of the second horizontal part is integrally connected to the first vertical part.

5. A heat dissipation device with a fixing function as described in claim 4, characterized in that, The clamping spring piece is formed by digging out a second block from the first horizontal part and bending it downward.

6. The heat dissipation device with a fixing function according to claim 5, characterized in that, The starting section of the clamping spring piece connecting the first horizontal part is a guiding inclined surface.

7. The heat dissipation device with a fixing function according to claim 5, characterized in that, The distance between the connection point of the clamping spring piece connecting the first horizontal part and the contact surface of the contact part is less than the thickness of the clamped part of the heating element.

8. The heat dissipation device with a fixing function according to claim 3, characterized in that, There are heat dissipation holes on at least one of the first horizontal part and the first vertical part.

9. The heat dissipation device with a fixing function as described in claim 4, characterized in that, A third block is dug out from the side of the second horizontal part and vertically extended to form a first support leg, and the first support leg is integrally connected to the lower end of the contact part.

10. A heat dissipation device with a fixed function as described in claim 9, characterized in that, Two second support legs are integrally connected to the lower end of the first vertical part, and the lower ends of the second support legs are horizontally flush with the lower end of the first support leg.

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