Pin and integrated power module

Abstract

The utility model discloses a contact pin and an integrated power module, the contact pin comprises a contact pin main body and a sealing structure, and the contact pin main body is of a linear rod-shaped structure; the sealing structure surrounds and is connected to the outer peripheral surface of the pin main body, and the sealing structure is provided with a sealing surface perpendicular to the pin main body; wherein the contact pin main body comprises an inserting part which is used for being connected with a pin seat in a matched manner, and the inserting part is positioned on one side of the sealing surface of the sealing structure. According to the contact pin and the integrated power module, a sealing structure between the contact pin and the pin seat can be formed, foreign matters are prevented from entering, and stable matching between the contact pin and the pin seat is ensured.

Description

Technical Field

[0001] The present application belongs to the technical field of power devices, and in particular relates to a pin and an integrated power module. Background Art

[0002] In the assembly of integrated power modules, pins and pin holders are usually required to cooperate and connect to achieve connection and conduction between the PCB board and the module, and pin technology can greatly improve production efficiency.

[0003] Currently, pin insertion technology typically involves plugging the pin into a socket. However, due to the different shapes of the pin and the socket, a certain gap exists between the pin and the socket. During operation of the integrated power module, foreign matter such as oil can enter this gap, affecting the mating relationship between the pin and the socket, causing the pin to fall off and resulting in unstable operation of the integrated power module. Utility Model Content

[0004] The present application provides a plug pin and an integrated power module, which can form a sealing structure between the plug pin and the pin holder, prevent foreign matter from entering, and ensure stable cooperation between the plug pin and the pin holder.

[0005] The present application provides a plug pin, which includes: a plug pin body, which is a straight rod-shaped structure; a sealing structure, which surrounds and is connected to the outer peripheral surface of the plug pin body, and the sealing structure has a sealing surface perpendicular to the plug pin body; wherein the plug pin body includes a plug-in portion for mating and connecting with the needle seat, and the plug-in portion is located on one side of the sealing surface of the sealing structure.

[0006] As for the above-mentioned pin, the sealing surface is centrally symmetrical and is concentrically arranged with the pin body. The sealing surface has a sealing distance D between two opposite points on the edge of the sealing surface on both sides of the symmetry center, and the sealing distance D satisfies: D ≥ 1.5 mm.

[0007] In the above-mentioned plug pin, the sealing structure is a columnar structure coaxially arranged with the plug pin body, and the cross section of the sealing structure along its own extension direction is centrally symmetrical.

[0008] In the above pin, the outer edge of the sealing surface is circular.

[0009] As for the above plug pin, the plug portion has a plug length L along the extension direction of the plug pin body, and the plug length L satisfies: 2mm≤L≤3mm.

[0010] As shown in the above pin, the sealing structure has a supporting surface, and the supporting surface and the sealing surface are respectively arranged on opposite sides of the sealing structure; the pin body also includes a connecting portion for connecting to the circuit board, and the connecting portion is located on one side of the supporting surface of the sealing structure.

[0011] The pin as above, wherein the pin further includes: a reinforcement structure, the reinforcement structure is connected between the support surface and the outer peripheral surface of the connecting portion, and a plurality of reinforcement structures are evenly spaced along the circumference of the connecting portion.

[0012] The pin as above, wherein the number of the reinforcement structures is 2 to 4.

[0013] In the above pin, the sealing surface is obliquely connected to the edge of the sealing structure and the outer peripheral surface of the connecting portion.

[0014] On the other hand, the present application also provides an integrated power module, which includes the above-mentioned pins, and the integrated power module also includes: a power module body, the power module body has a pin holder, the pin holder is used to plug and mate with the plug-in part of the pin; a circuit board, the circuit board is conductively connected to the connecting part of the pin.

[0015] The plug pin of the present application includes a plug body and a sealing structure. The plug body is a straight rod-shaped structure. The sealing structure is connected to the outer peripheral surface of the plug body in a circumferential manner. The sealing structure has a sealing surface that is perpendicular to the straight pin body. On one side of the sealing surface of the sealing structure is the plug-in portion of the plug body. After the integrated power module is assembled, the plug-in portion of the plug pin is inserted into the pin socket. The sealing surface, which is perpendicular to the pin body, can be positioned against the top of the pin socket to cover the gap between the plug-in portion and the pin socket, thereby sealing the gap, preventing foreign matter from entering the gap, and ensuring the stable fit between the plug-in portion and the pin socket. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the pin of an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the cooperation between the pin and the pin holder according to an embodiment of the present application;

[0019] Figure 3 A cross-sectional view of the pin and the pin holder in cooperation with each other according to an embodiment of the present application.

[0020] Description of Figure Numbers:

[0021] 10. Pin body; 11. Plug-in portion; 12. Connecting portion; 121. Connecting hole; 20. Sealing structure; 21. Sealing surface; 22. Support surface; 30. Needle seat; 40. Reinforcement structure. DETAILED DESCRIPTION

[0022] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0023] In the assembly of an integrated power module, pins are usually used to connect the PCB board and the power module to achieve a conductive connection between the two and realize the overall function of the integrated power module.

[0024] In the current pin insertion technology, pins are set on the PCB board and pin holders are set on the power module. When the PCB board and the power module are connected, the pins on the PCB board need to be inserted into the pin holders of the power module accordingly to achieve mechanical and conductive connections between the PCB board and the power module.

[0025] Typically, the needle holder is a cylindrical structure with one end fixedly mounted on the power module, and the cross-sectional shape of its internal space is usually circular, while the pin is usually a columnar structure with a square cross-section. After the pin is inserted into the needle holder, its four corners can be snapped into the inner surface of the needle holder, achieving an interference fit with the needle holder. However, this fit will cause gaps to form between the surfaces of the pin and the inner surface of the needle holder.

[0026] When connecting a PCB board and a power module using pin insertion technology, the insertion and withdrawal forces between the pin and the socket must be considered. Factors that primarily influence these forces include the material hardness, surface condition, and insertion depth of the pin and socket. When using existing pin insertion technology, foreign matter such as oil can enter the gap, contaminating the surfaces of the pin and socket, affecting their surface condition and insertion depth. This reduces the withdrawal force and makes it easy for the pin to fall out of the socket, resulting in unstable operation of the integrated power module.

[0027] In order to solve the above problems, the embodiments of the present application provide a plug-in pin and an integrated power module, which can form a sealing structure between the plug-in pin and the pin holder, prevent foreign matter from entering, and ensure stable cooperation between the plug-in pin and the pin holder. Figures 1 to 3 As an example, the pins and integrated power module in the embodiments of the present application are introduced.

[0028] like Figures 1 to 3As shown, an embodiment of the present application provides a plug pin, which includes: a plug pin body 10, which is a straight rod-shaped structure; a sealing structure 20, which surrounds and is connected to the outer peripheral surface of the plug pin body 10, and the sealing structure 20 has a sealing surface 21 perpendicular to the plug pin body 10; wherein, the plug pin body 10 includes a plug-in portion 11 for mating and connecting with the needle seat 30, and the plug-in portion 11 is located on one side of the sealing surface 21 of the sealing structure 20.

[0029] In specific implementation, the pin of the embodiment of the present application includes a pin body 10 and a sealing structure 20. The pin body 10 is a straight rod-shaped structure. The sealing structure 20 is circumferentially connected to the outer peripheral surface of the pin body 10. The sealing structure 20 has a sealing surface 21. The sealing surface 21 is perpendicular to the straight-line structure of the pin body 10. On one side of the sealing surface 21 of the sealing structure 20 is the plug-in portion 11 of the pin body 10.

[0030] After the integrated power module is assembled, the plug-in portion 11 of the pin is inserted into the needle seat 30, and the sealing surface 21 perpendicular to the pin body 10 can be set against the top of the needle seat 30 to completely cover the top of the needle seat 30, thereby covering the gap between the plug-in portion 11 and the needle seat 30 (i.e. Figure 3 The gap is sealed between the surfaces of the middle plug-in part 11 and the inner surface of the needle seat 30, thereby preventing foreign matter from entering the gap and ensuring the matching stability between the plug-in part 11 and the needle seat 30.

[0031] Moreover, when using a plug pin with this sealing structure 20, after the plug-in portion 11 of the plug pin is fully inserted into the needle seat 30, the sealing structure 20 can prevent the plug pin from being further inserted, thereby ensuring a fixed insertion depth of the plug pin, so that there is a stable pressing force between the plug pin and the needle seat 30, and ensuring the plug-in stability of the two.

[0032] Specifically, both ends of the linear rod-shaped pin body 10 are platform structures with gradually decreasing cross-sectional areas. Such a structure facilitates the insertion or connection of the pin body 10 .

[0033] Specifically, the pin body 10 and the sealing structure 20 are an integrally formed structure, and the pin can be manufactured by stamping or forging, thereby ensuring the connection stability between the pin body 10 and the sealing structure 20.

[0034] The material of the pin includes but is not limited to copper alloy material to ensure the pin has structural stability.

[0035] In the embodiment of the present application, the sealing surface 21 is centrally symmetrical and is concentrically arranged with the pin body 10. The sealing surface 21 has a sealing distance D between two opposite points on the edge of the sealing surface 21 on both sides of the symmetry center. The sealing distance D satisfies: D ≥ 1.5 mm.

[0036] It should be noted that the sealing distance D represents the shortest distance between a line passing through the center of symmetry of the sealing surface 21 and connecting two endpoints located on the edge of the sealing surface 21. If the sealing surface 21 is circular, the sealing distance D is expressed as the diameter of the circle; if the sealing surface is square, the sealing distance D is expressed as the side length of the square.

[0037] The sealing distance D needs to meet the minimum requirement of 1.5 mm to ensure that the sealing surface 21 can completely cover the gap between the plug-in part 11 and the needle seat 30, thereby completely preventing foreign matter from entering the gap, ensuring the cleanliness of the surface of the plug-in part 11 and the internal surface of the needle seat 30, and ensuring the matching stability between the two.

[0038] It should be noted that the setting of the sealing distance D here is based on the pin structure and the needle seat structure used in the integrated power module commonly used in the relevant technology, and can meet the use requirements of most conventional integrated power modules.

[0039] In the plug pin of the embodiment of the present application, the sealing structure 20 is a columnar structure coaxially arranged with the plug pin body 10 , and the cross section of the sealing structure 20 along its own extension direction is centrally symmetrical.

[0040] The sealing structure 20 is set as a columnar structure coaxially arranged with the pin body 10, so that the sealing structure 20 can be set around the outer peripheral surface of the pin body 10. Along the extension direction of the columnar structure, the cross-section of the sealing structure 20 is a centrally symmetrical shape, so that the sealing structure 20 can cover any position on the circumference of the pin body 10. When the plug-in part 11 of the pin body 10 is inserted into the needle seat 30, the gap between the plug-in part 11 and the needle seat 30 can be completely covered, avoiding any gap from being exposed, thereby further improving the sealing of the gap.

[0041] like Figure 1 and Figure 2 As shown, the embodiment of the present application provides a plug pin, which includes: a plug body 10, which is a straight rod-shaped plug pin. In the embodiment of the present application, the outer edge of the sealing surface 21 is circular. The sealing surface 21 with a circular outer edge is more symmetrical in its circumference, and can achieve uniform coverage at all positions in the circumference, further improving the sealing performance of the gap.

[0042] Optionally, the outer edge of the sealing surface 21 may be in a square or diamond shape, as long as it can completely cover the gap between the plug-in portion 11 and the needle seat 30 .

[0043] like Figure 1As shown, an embodiment of the present application provides a plug pin, which includes: a plug pin body 10, which is in the shape of a straight rod. The plug pin of the embodiment of the present application, wherein along the extension direction of the plug pin body 10, the plug-in portion 11 has a plug-in length L, and the plug-in length L satisfies: 2mm≤L≤3mm.

[0044] Setting the insertion length L of the plug portion 11 between 2mm and 3mm can meet the requirements for the fit between the pin and the needle hub 30. A length L greater than 2mm ensures sufficient extrusion force between the plug portion 11 and the needle hub 30, preventing it from easily falling out of the needle hub 30. A length L less than 3mm prevents interference between the plug portion 11 and the soldering surface of the needle hub 30 on the power module body after insertion, ensuring that the plug portion 11 is fully inserted into the needle hub 30 and the sealing effect of the sealing surface 21.

[0045] like Figure 2 As shown, an embodiment of the present application provides a pin, which includes: a pin body 10, which is in the shape of a straight rod. The pin of the embodiment of the present application, wherein the sealing structure 20 has a supporting surface 22, and the supporting surface 22 and the sealing surface 21 are respectively arranged on opposite sides of the sealing structure 20; the pin body 10 also includes a connecting portion 12 for connecting to a circuit board, and the connecting portion 12 is located on one side of the supporting surface 22 of the sealing structure 20.

[0046] The pin further includes a reinforcement structure 40 , which is connected between the support surface 22 and the outer circumferential surface of the connecting portion 12 . A plurality of reinforcement structures 40 are evenly spaced along the circumference of the connecting portion 12 .

[0047] In a specific implementation, the other side of the sealing structure 20 is the support surface 22, and on one side of the support surface 22 is the connecting portion 12 of the pin body 10. Therefore, the connecting portion 12 and the plug-in portion 11 are respectively arranged on both sides of the sealing structure 20, and are respectively used to connect the circuit board of the integrated power module and the needle seat 30.

[0048] Specifically, the connecting portion 12 has a connecting hole 121 for connecting to a circuit board. The connecting hole 121 can be shaped like a fisheye or an ellipse. The shape of the connecting hole 121 facilitates the connection between the connecting portion 12 and the circuit board, reduces the overall process difficulty, and improves production efficiency.

[0049] On one side of the support surface 22, a plurality of reinforcing structures 40 are provided. The reinforcing structures 40 are connected between the support surface 22 and the outer peripheral surface of the connecting portion 12. Since the sealing structure 20 is a structure protruding from the outer peripheral surface of the pin body 10, the provision of the reinforcing structures 40 provides the sealing structure 20 with a support base. When the plug-in portion 11 is plugged in, the reinforcing structures 40 can provide a supporting effect on the sealing structure 20, thereby preventing the sealing structure 20 from breaking when it is against the needle seat 30, thereby improving the overall strength of the sealing structure 20.

[0050] Multiple reinforcement structures 40 are evenly spaced along the circumference of the connecting portion 12, which can provide uniform support to the sealing structure 20 in the circumferential direction, so that the risk of fracture of the sealing structure 20 at any position in the circumferential direction is low, thereby ensuring the plug-in stability of the pin.

[0051] In the plug pin of the embodiment of the present application, the number of the reinforcement structures 40 is 2 to 4.

[0052] In practice, the number of reinforcement structures 40 is set to 2 to 4. This avoids the complexity of the manufacturing process caused by too many reinforcement structures 40, while also avoiding the uneven support or insufficient support strength caused by too few reinforcement structures 40. Therefore, a number of 2 to 4 is a relatively balanced number, balancing the difficulty of inserting the pins with the structural strength.

[0053] Specifically, if Figure 2 As shown, there are two reinforcement structures 40 , and the two reinforcement structures 40 are symmetrically arranged.

[0054] In another optional embodiment of the present application, the sealing surface 21 is obliquely connected to the edge of the sealing structure 20 and the outer peripheral surface of the connecting portion 12 .

[0055] In practice, in this embodiment, the sealing surface 21 can be inclined, so that the sealing structure 20 forms a tapered structure facing the connecting portion 12. This tapered structure surrounds the outer circumference of the connecting portion 12, providing stable support for the entire sealing structure 20. Furthermore, the inclined sealing surface 21 reduces the overall process complexity when using an integrated molding process, thereby improving production efficiency.

[0056] An embodiment of the present application also provides an integrated power module, which includes the above-mentioned pins, and the integrated power module also includes: a power module body, the power module body has a needle seat 30, the needle seat 30 is used to plug and mate with the plug-in portion 11 of the pin; a circuit board, the circuit board is conductively connected to the connecting portion 12 of the pin.

[0057] In specific implementation, the integrated power module of the embodiment of the present application includes a power module body, a circuit board, and a pin. The pin includes a pin body 10 and a sealing structure 20. The pin body 10 is a straight rod-shaped structure. The sealing structure 20 is connected to the outer circumference of the pin body 10 in a circumferential manner. The sealing structure 20 has a sealing surface 21, which is perpendicular to the straight pin body 10. On one side of the sealing surface 21 of the sealing structure 20 is the plug-in portion 11 of the pin body 10. After the integrated power module is assembled, the plug-in portion 11 of the pin is inserted into the pin hub 30. The sealing surface 21, which is perpendicular to the pin body 10, can abut against the top of the pin hub 30 to cover the gap between the plug-in portion 11 and the pin hub 30, thereby sealing the gap, preventing foreign matter from entering the gap, and ensuring the stable fit between the plug-in portion 11 and the pin hub 30.

[0058] Specifically, the circuit board is a PCB (Printed Circuit Board), which, when connected to the power module body through pins, can form an integrated power module and implement different control functions.

[0059] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0060] The above description is only a specific embodiment of the present application. Those skilled in the art will clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the scope of protection of the present application.

Claims

1. A pin, characterized in that: include: The pin body (10) is a straight rod-shaped structure; A sealing structure (20) surrounds and is connected to the outer peripheral surface of the pin body (10), and the sealing structure (20) has a sealing surface (21) perpendicular to the pin body (10); The pin body (10) includes a plug-in portion (11) for mating with the needle seat (30), and the plug-in portion (11) is located on one side of the sealing surface (21) of the sealing structure (20).

2. The pin according to claim 1, wherein: The sealing surface (21) is centrally symmetrical and is concentrically arranged with the pin body (10). The sealing surface (21) has a sealing distance D between two opposite points on the edge of the sealing surface (21) on both sides of the symmetrical center. The sealing distance D satisfies the following conditions: D≥1.5 mm.

3. The pin according to claim 1 or 2, characterized in that: The sealing structure (20) is a columnar structure coaxially arranged with the pin body (10), and the cross section of the sealing structure (20) along its own extension direction is centrally symmetrical.

4. The pin according to claim 3, wherein: The outer edge of the sealing surface (21) is circular in shape.

5. The pin according to claim 1, wherein: Along the extension direction of the pin body (10), the plug-in portion (11) has a plug-in length L, and the plug-in length L satisfies: 2mm≤L≤3mm.

6. The pin according to claim 1, wherein: The sealing structure (20) has a supporting surface (22), and the supporting surface (22) and the sealing surface (21) are respectively arranged on opposite sides of the sealing structure (20); the pin body (10) also includes a connecting portion (12) for connecting to a circuit board, and the connecting portion (12) is located on one side of the supporting surface (22) of the sealing structure (20).

7. The pin according to claim 6, characterized in that The pin also includes: A reinforcing structure (40) is connected between the supporting surface (22) and the outer peripheral surface of the connecting portion (12), and a plurality of the reinforcing structures (40) are evenly spaced along the circumference of the connecting portion (12).

8. The pin according to claim 7, wherein: The number of the reinforcement structures (40) is 2 to 4.

9. The pin according to claim 6, wherein: The sealing surface (21) is obliquely connected to the edge of the sealing structure (20) and the outer peripheral surface of the connecting portion (12).

10. An integrated power module, characterized in that: The integrated power module comprises the pin according to any one of claims 1 to 9, and further comprises: A power module body, the power module body having a needle seat (30), the needle seat (30) being used for plugging and matching with the plug-in portion (11) of the plug-in pin; A circuit board is conductively connected to the connecting portion (12) of the pin.

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