Signal connector fixing structure for power supply module

Abstract

The utility model relates to an electric connector, in particular to a signal connector fixing structure for a power module. A signal connector fixing structure for a power supply module comprises a housing directly or indirectly fixed with a circuit board and a connector assembly body fixed on the circuit board, the housing is provided with a window for a plugging end of the connector assembly body to pass through, and pins of the connector assembly body are electrically connected with the circuit board. The pin is L-shaped and comprises a first extension section extending along the plugging direction and a second extension section forming an included angle with the first extension section, a shielding piece is arranged at the pin end of the connector body, the shielding piece is in a cover shape and is fixed with a shell of the connector body, an opening of the shielding piece faces the circuit board, and the shielding piece is arranged on the circuit board. The extending direction of the second extending section is the same as the opening direction of the shielding piece, and the outer wall of the shielding piece extends outwards to form a contact protrusion. According to the utility model, the influence on the layout of the circuit board is reduced, and the electromagnetic shielding effect is improved.

Description

Technical Field

[0001] This utility model relates to an electrical connector, specifically to a signal connector fixing structure for a power module. Background Technology

[0002] In the design of power supply products, to reduce external electromagnetic interference, the casing is usually made of a magnetically conductive metal material. Power supplies typically connect to external wires via connectors to achieve signal transmission and power control; therefore, shielding is also installed at the connectors.

[0003] For example, the shielded connector disclosed in Chinese Patent Application No. 202020036589.1 achieves electromagnetic shielding by setting a shielding component outside the connector to wrap around the connector's base. However, this solution has the following drawbacks: the shielding component wraps around the entire connector's base, occupying a larger area, requiring changes to the positions of other electrical components on the circuit board, affecting the circuit board layout, and resulting in a larger overall power module; at the same time, the shielding component is placed between the base and the base shell, making it difficult to ground, resulting in a lack of a good discharge path and still having significant electromagnetic interference. Utility Model Content

[0004] The purpose of this invention is to provide a signal connector fixing structure for power modules that has less impact on circuit board layout and better electromagnetic shielding effect.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a signal connector fixing structure for a power module, comprising a housing directly or indirectly fixed to a circuit board and a connector body fixed to the circuit board. The housing has a window for the insertion end of the connector body to pass through. The pins of the connector body are electrically connected to the circuit board. The pins are L-shaped and include a first extension section extending along the insertion direction and a second extension section forming an angle with the first extension section. The pin ends of the connector body are provided with a shield made of magnetically conductive material. The shield is cover-shaped and fixed to the housing of the connector body. The opening of the shield faces the circuit board, and the extension direction of the second extension section is the same as the opening direction of the shield. The outer wall of the shield extends outward with a contact protrusion. When the connector body, the circuit board, and the housing are fixed, the end face of the opening end of the shield is close to or in contact with the circuit board, the second extension section is electrically connected to the circuit board, and the contact protrusion is in contact with the housing.

[0006] The shielding component of this invention can tightly wrap the pin ends of the connector body, reducing electromagnetic interference leakage. Compared with traditional shielding components, the cover-shaped structure occupies less space and has less impact on the circuit board layout, allowing the overall size of the power module to be smaller. The contact protrusion contacts the shell, ensuring a good electrical connection between the shielding component and the shell, providing an effective discharge path for electromagnetic interference and reducing electromagnetic interference. At the same time, the design of the contact protrusion improves the reliability of the overall structure, maintaining a stable electrical connection even under vibration or shock environments.

[0007] The L-shaped pins allow for different insertion and installation directions on the connector body. This enables the use of a window on the side of the housing, freeing up space in the height direction of the connector body for other electrical components. Simultaneously, the shielding component can be made with a non-enclosed cross-section (neither circular nor square), featuring openings on both the side and bottom. This effectively reduces the shielding component's size and space requirements, facilitating assembly between the shielding component and the connector. When using a tight-fitting method, the non-enclosed shielding component fits snugly and securely with the connector body. Furthermore, this structure reduces material usage compared to enclosed structures, lowering material costs. The open design also reduces the complexity of injection molding and other processes, further reducing production costs.

[0008] Preferably, the housing of the connector body is injection molded onto the shielding member, and the contact protrusion passes through the housing with its end located outside the housing.

[0009] By using injection molding to tightly bond the shell and the shielding component, the stability of the overall structure is enhanced, and gaps caused by loosening between the shielding component and the shell are avoided, thereby improving the reliability of electromagnetic shielding.

[0010] The contact protrusion passes through the housing and extends to the outside of the housing. Part of the contact protrusion is fixed to the connector body, which can avoid the problem of the contact protrusion not making a hard contact due to excessive displacement caused by the contact pressure of the housing. It can ensure that a good electrical connection is formed between the shield and the housing, thereby providing an effective discharge path for electromagnetic interference and reducing electromagnetic interference.

[0011] Preferably, the circuit board is provided with a plurality of positioning holes, and the shielding component has positioning protrusions corresponding to the positioning holes.

[0012] The engagement of the positioning protrusions and positioning holes ensures the accurate placement of the shielding component on the circuit board, preventing a decrease in electromagnetic shielding effectiveness or interference with other components due to positional deviations. The positioning protrusions can also be used for grounding.

[0013] Preferably, the contact protrusion is inclined relative to the mounting direction of the housing. This arrangement facilitates contact between the contact protrusion and the housing.

[0014] Preferably, the contact protrusion includes a plurality of protruding units arranged side by side, the thickness of each protruding unit gradually decreasing from the root to the end.

[0015] By incorporating multiple raised units, the contact area between the contact protrusions and the housing is increased, improving contact stability. Simultaneously, the gradually decreasing thickness of the raised units allows them to better adapt to the shape of the housing, reducing the impact of contact pressure on the contact protrusions and further ensuring a good electrical connection between the shielding component and the housing.

[0016] Preferably, the connector body has a plurality of housing extensions on its housing, the extension direction of which is parallel to the extension direction of the second extension segment, and the circuit board and the end of the housing extension are provided with a snap-fit ​​structure and a positioning structure that cooperate with each other.

[0017] The extended housing section enhances the stability of the connection between the housing and the circuit board. The snap-fit ​​and positioning mechanisms ensure accurate placement of the housing on the circuit board, preventing reduced electromagnetic shielding effectiveness or interference with other components due to misalignment. This design further improves the overall reliability and stability of the structure.

[0018] This invention optimizes the structure and installation method of the shielding component, reduces the impact on the circuit board layout, and improves the electromagnetic shielding effect. It also enhances the stability and reliability of the overall structure, provides an effective discharge path for electromagnetic interference, and thus achieves superior electromagnetic shielding performance. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the connector body of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the connector body and the circuit board of this utility model.

[0021] Figure 3 This is a schematic diagram of another structure when the connector body of this utility model is fixed to the circuit board.

[0022] Figure 4 This is a diagram showing the usage status of the LCD screen of the controller of this utility model. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0024] Depend on Figures 1 to 3As shown, this embodiment discloses a signal connector fixing structure for a power module, including a cast aluminum shell 2 fixed to a circuit board 1 to form a receiving cavity, a connector body 3 disposed within the receiving cavity, pins at one end of the connector body being fixed to the circuit board 1, and a window provided in the shell 2 for the insertion end 30 of the connector body 3 to pass through. Figure 1 As shown, the pin 31 in this embodiment is L-shaped, including a first extension 311 extending along the insertion direction and a second extension 312 perpendicular to the first extension 311. The pin end of the connector body 3 is provided with a shield 4 made of tinplate. The shield 4 is cover-shaped and fixed to the housing 39 of the connector body 3. The opening of the shield 4 faces the circuit board 1, and the extension direction of the second extension 312 is the same as the opening direction of the shield 4.

[0025] The top outer wall of the shield 4 has a contact protrusion 41 extending upward. When the connector body 3, the circuit board 1 and the housing 2 are fixed, the end face (lower end face) of the opening end of the shield 4 is close to or in contact with the circuit board 1, the second extension 312 is electrically connected to the circuit board 1, and the contact protrusion 41 is in contact with the housing 2.

[0026] In this embodiment, the connector body 3's housing 39 is injection molded onto the shielding member 4. A contact protrusion 41 passes through the housing 39, with its end positioned on the upper side of the housing 39. The contact protrusion 41 is inclined relative to the mounting direction of the outer casing 2. In this embodiment, the outer casing 2 is fixed to the circuit board 1 with its downward mounting. Figure 2 and Figure 4 As shown, the contact protrusion 41 includes several protrusion units arranged side by side, and the thickness of each protrusion unit gradually decreases from the root to the end. The circuit board 1 has several positioning holes, and the shielding member 4 has positioning protrusions 42 that correspond to the positioning holes and extend downwards. The positioning protrusions 42 are grounded.

[0027] Depend on Figures 1 to 3 As shown, the housing 39 of the connector body 3 is provided with a plurality of housing extensions 38 extending vertically. The extension direction of the housing extensions 38 is parallel to the extension direction of the second extension section 312. The circuit board 1 and the ends of the housing extensions 38 are provided with a buckle structure and a positioning structure that cooperate with each other. Two housing extensions are cylindrical and have positioning ends 381. The positioning structure includes a round hole provided on the circuit board 1 and connected to the positioning end 381. The lower ends of the two housing extensions are provided with buckles 382. The buckle structure also includes two square holes provided on the circuit board 1 for cooperating with the buckles.

[0028] This embodiment improves electromagnetic shielding effectiveness, reduces electromagnetic interference, and ensures signal integrity; it enhances anti-interference capabilities and reduces interference from power supply noise and environmental noise; in complex electronic systems, shielding low-voltage signals can reduce signal fluctuations and improve system stability and reliability; power supply products need to comply with electromagnetic compatibility (EMC) standards, and shielding low-voltage signals can help products pass relevant tests, avoid electromagnetic interference problems, comply with project regulations, and improve product quality.

Claims

1. A signal connector fixing structure for a power module, comprising a housing directly or indirectly fixed to a circuit board and a connector body fixed to the circuit board, wherein the housing has a window for the insertion end of the connector body to pass through, and the pins of the connector body are electrically connected to the circuit board, characterized in that: The pin is L-shaped, including a first extension section extending along the insertion direction and a second extension section forming an angle with the first extension section. The pin end of the connector body is provided with a shield made of magnetic material. The shield is cover-shaped and fixed to the housing of the connector body. The opening of the shield faces the circuit board, and the extension direction of the second extension section is the same as the opening direction of the shield. The outer wall of the shield extends outward with a contact protrusion. When the connector body, circuit board and housing are fixed, the end face of the opening end of the shield is close to or in contact with the circuit board, the second extension section is electrically connected to the circuit board, and the contact protrusion is in contact with the housing.

2. The signal connector fixing structure for a power module according to claim 1, characterized in that: The housing of the connector body is injection molded onto the shielding component, and the contact protrusion passes through the housing with its end located outside the housing.

3. The signal connector fixing structure for a power module according to claim 1, characterized in that: The circuit board has a plurality of positioning holes, and the shielding component has positioning protrusions corresponding to the positioning holes.

4. The signal connector fixing structure for a power module according to claim 1, 2, or 3, characterized in that: The contact protrusion is inclined relative to the mounting direction of the housing.

5. The signal connector fixing structure for a power module according to claim 1, 2, or 3, characterized in that: The contact protrusion includes several protruding units arranged side by side, and the thickness of each protruding unit gradually decreases from the root to the end.

6. The signal connector fixing structure for a power module according to claim 1, characterized in that: The connector body has a plurality of housing extensions on its housing. The extension direction of the housing extensions is parallel to the extension direction of the second extension segment. The circuit board and the end of the housing extensions are provided with a snap-fit ​​structure and a positioning structure that cooperate with each other.

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