Circuit board connector assembly and automobile air conditioner actuator using the same

Abstract

The utility model relates to the technical field of automobile motor, especially a kind of line board connector subassembly and the automobile air conditioner executor using it.The line board connector subassembly includes line board, pin and socket, the upper surface of one end edge of line board is equipped with contact, pin includes clamping part, support part and pin foot part, clamping part and the upper surface contact of line board are elastically clamped and fixed on contact, support part is connected to the bottom of clamping part, pin foot part extends from the side of support part;Socket is equipped with insertion slot, limiting slot and through hole, support part is embedded in limiting slot, pin foot part passes through through hole, and the end of line board is inserted into insertion slot.The elastic clamping of pin, the limiting of support part and the through design of pin foot part ensure that the connection of line board and socket is stable and reliable, even in vibration or impact environment, it can also maintain good electrical connection;The clamping part structure of pin can adapt to line board of different thickness, improve the versatility and applicability of assembly.

Description

Technical Field

[0001] This utility model relates to the field of automotive motor technology, and in particular to a circuit board connector assembly and an automotive air conditioning actuator using the same. Background Technology

[0002] In mechatronics products such as modern automotive actuators and industrial automation equipment, the reliability of the connection between the PCB circuit board and external pins directly affects the stable operation of the entire system. Currently, the traditional soldering connection method used in most actuator products on the market has the following technical defects:

[0003] a. Cold solder joint problem: The soldering process requires high technical skills from operators. In actual production, cold solder joints are easily caused by improper temperature control, uneven solder amount, or improper use of flux. In the early stage, cold solder joints may manifest as intermittent poor contact, which will gradually worsen with the action of environmental stress such as vibration and thermal cycling.

[0004] b. Difficulty in small-pitch connection: Modern actuators are developing towards miniaturization, and the pin pitch has been reduced from the traditional 2.54mm to 1.27mm or even 0.8mm. At a pitch of ≤1mm, traditional welding is prone to bridging and short circuits, and miniaturized connection requires expensive precision welding equipment.

[0005] c. Poor environmental adaptability: The temperature of the environment, such as the car engine compartment, changes drastically. Stress cracks may occur at the weld joints due to the mismatch of thermal expansion coefficients. Under vibration conditions, the risk of fatigue failure of the weld joints increases.

[0006] d. Difficult to repair: Welding is a permanent connection, and high temperature desoldering is required during repair, resulting in a low success rate for multilayer boards to be repaired.

[0007] To address the aforementioned issues, existing solutions on the market employ insulated displacement connections or crimp terminals, but these have high contact resistance and are unsuitable for high-current applications. Other solutions utilize anisotropic conductive adhesives for connection, but the conductivity of these adhesives decreases after aging. Still others use elastic contact components such as spring pins, but the single-point contact pressure needs to be maintained at 50–100g, and these components are prone to loosening over long-term use. Utility Model Content

[0008] The technical problem to be solved by this utility model is: in order to solve the problems of poor soldering, difficulty in small-pitch connection, poor environmental adaptability and maintenance difficulties in the above-mentioned background technology, as well as the various defects of existing other methods, a circuit board connector assembly is provided, which sets an S-shaped bend at one end of the pin and makes an interference fit with the PCB circuit board to ensure full contact between the pin and the PCB circuit board and ensure its conductivity. No additional soldering is required, and it is suitable for automotive air conditioning actuators.

[0009] The technical solution adopted by this utility model to solve its technical problem is: a circuit board connector assembly, including a circuit board, pins and a socket, wherein a contact point is provided on the upper surface of one edge of the circuit board.

[0010] The pin includes a clamping part, a supporting part, and a pin foot part. The clamping part is elastically clamped and fixed to the contact on the upper surface of the circuit board. The supporting part is connected to the bottom of the clamping part, and the pin foot part extends out from one side of the supporting part.

[0011] The socket has a plug slot, a limiting slot and a through hole. The support part is embedded in the limiting slot, the pin part passes through the through hole, and the end of the circuit board is inserted into the plug slot.

[0012] By using the elastic clamping of the pins and the contacts on the circuit board, as well as the cooperation between the pin support and the pin foot and the socket, a stable connection between the circuit board and the socket is achieved, ensuring that the circuit board can reliably connect to the socket. At the same time, the elastic clamping of the pins can accommodate certain dimensional errors, improving the stability and reliability of the connection.

[0013] According to one embodiment of the present invention, the clamping part includes two symmetrically arranged elastic metal sheets, each elastic metal sheet having an inwardly protruding S-shaped curved portion, which elastically contacts the contact point.

[0014] The S-shaped bend allows for better contact with the contacts, increasing the contact area and elastic clamping force, thus improving the strength and conductivity of the connection.

[0015] According to one embodiment of the present invention, the minimum distance between the S-shaped bends on the two elastic metal sheets is 0.4 to 0.6 times the thickness of the circuit board.

[0016] This limitation ensures that the pins can adapt to circuit boards of different thicknesses, while also ensuring that the clamping force is moderate, avoiding damage to the circuit board due to excessive clamping force or poor contact due to insufficient clamping force.

[0017] According to one embodiment of the present invention, the support portion is a plate-shaped structure.

[0018] The plate-like support structure provides stable support, ensuring the pins are accurately positioned in the socket, and also facilitates the processing and manufacturing of the pins.

[0019] According to one embodiment of the present invention, the pin is an integrally formed structure.

[0020] The one-piece molded pin structure is more robust, reduces the risk of failure caused by welding or splicing, and improves the reliability and service life of the product.

[0021] According to one embodiment of the present invention, the depth of the limiting groove is not less than the thickness of the support portion.

[0022] This limitation ensures that the support part can be fully embedded in the limiting groove, preventing the pins from becoming loose or displaced in the socket and improving the stability of the connection.

[0023] According to one embodiment of the present invention, the limiting groove is connected to the through hole.

[0024] This design allows the pin to pass smoothly through the through hole, while the limiting slot can limit the support part, further improving the reliability and stability of the connection.

[0025] According to one embodiment of the present invention, a U-shaped positioning notch is provided at one end of the circuit board near the contact point to cooperate with the socket.

[0026] The U-shaped positioning notch can match the structure of the socket, further improving the positioning accuracy of the circuit board and the socket, and ensuring the accuracy and reliability of the connection.

[0027] Another automotive air conditioning actuator is provided, including a housing and a cover. The housing contains a motor assembly, a gear transmission group, and a circuit board connector assembly as described above. The housing is provided with a positioning post that cooperates with the positioning circuit board.

[0028] The electrical connection of the automotive air conditioning actuator is achieved through the circuit board connector assembly, and the positioning post can ensure the accurate positioning of the circuit board in the housing, thereby improving the assembly accuracy and reliability of the entire actuator.

[0029] According to one embodiment of the present invention, the cover is connected to the housing by a snap-fit ​​structure, the snap-fit ​​structure including an elastic snap correspondingly disposed on the cover and a mating protrusion on the housing.

[0030] The snap-fit ​​structure makes it easier and faster to connect the cover to the housing, while the elastic snap-fit ​​provides a certain degree of flexibility to ensure a firm connection and facilitates the assembly and disassembly of the actuator.

[0031] The beneficial effects of this utility model are:

[0032] (1) Through the elastic clamping of the pins, the limiting of the support and the conductive design of the pin, the connection between the circuit board and the socket is ensured to be stable and reliable, and good electrical connection can be maintained even in vibration or shock environment;

[0033] (2) The clamping structure of the pins can adapt to circuit boards of different thicknesses, improving the versatility and applicability of the components;

[0034] (3) The U-shaped positioning notch on the circuit board and the positioning post on the housing, as well as the snap-fit ​​structure between the cover and the housing, make the assembly of the entire automotive air conditioning actuator more convenient and quick, and improve production efficiency.

[0035] (4) The one-piece molding structure and elastic clamping structure of the pin reduce the risk of failure caused by welding or splicing and improve the service life of the product.

[0036] (5) Stable electrical connection and mechanical structure design ensure that the automotive air conditioning actuator will not experience electrical faults or mechanical loosening during operation, thus improving the safety and reliability of the product. Attached Figure Description

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] Figure 1 This is an assembly drawing of Embodiment 1 of this utility model.

[0039] Figure 2 yes Figure 1 A sectional view.

[0040] Figure 3 yes Figure 1 Cross-sectional view after assembly.

[0041] Figure 4 yes Figure 1 Longitudinal section view after assembly.

[0042] Figure 5 This is a schematic diagram of the circuit board structure in Embodiment 1 of this utility model.

[0043] Figure 6 This is a schematic diagram of the pin structure in Embodiment 1 of this utility model.

[0044] Figure 7 This is a schematic diagram of the socket structure in Embodiment 1 of this utility model.

[0045] Figure 8 yes Figure 7 Sectional view along the AA direction.

[0046] Figure 9 This is a structural schematic diagram of Embodiment 2 of this utility model.

[0047] Figure 10 This is an assembly drawing of Embodiment 2 of this utility model.

[0048] Figure 11 yes Figure 10 Longitudinal section view after assembly.

[0049] In the diagram: 1. Circuit board; 11. Contact; 12. Positioning notch; 2. Pin; 21. Clamping part; 211. Elastic metal sheet; 2111. S-shaped bend; 22. Support part; 23. Pin part; 3. Socket; 31. Insertion slot; 32. Limiting slot; 33. Through hole; 4. Housing; 41. Positioning post; 42. Mating protrusion; 5. Cover; 51. Elastic buckle; 6. Motor assembly; 7. Gear transmission group. Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0051] Example 1

[0052] like Figures 1-4 As shown, a circuit board connector assembly includes a circuit board 1, pins 2, and a socket 3. The upper surface of one edge of the circuit board 1 is provided with a contact 11. The pin 2 includes a clamping part 21, a supporting part 22, and a pin 23. The clamping part 21 is elastically clamped and fixed to the contact 11 on the upper surface of the circuit board 1. The supporting part 22 is connected to the bottom of the clamping part 21, and the pin 23 extends out from one side of the supporting part 22. The socket 3 is provided with a plug groove 31, a limiting groove 32, and a through hole 33. The plug groove 31 is used to accommodate the end of the circuit board 1. The limiting groove 32 is used to fit the supporting part 22 of the pin 2. The through hole 33 is used for the pin 23 to pass through. During assembly, the supporting part 22 is inserted into the limiting groove 32, the pin 23 passes through the through hole 33, and the end of the circuit board 1 is inserted into the plug groove 31.

[0053] The elastic contact of the clamping part 21 replaces traditional welding, avoiding the risk of poor welding and improving connection reliability; the mating structure of the pin 2 and the socket 3 supports quick insertion and removal, which is convenient for maintenance and replacement; the support part 22 is embedded in the limiting slot 32 to ensure the precise alignment of the pin 2 and the socket 3 and prevent misinsertion.

[0054] like Figure 5 As shown, a U-shaped positioning notch 12 is provided on the circuit board 1 near the contact 11 to cooperate with the socket 3, ensuring that the circuit board 1 is inserted in one direction and shortening the assembly time.

[0055] like Figure 6 As shown, the clamping part 21 of the pin 2 includes two symmetrically arranged elastic metal sheets 211. Each elastic metal sheet 211 has an inwardly protruding S-shaped bend 2111, which elastically contacts the contact 11. This arrangement provides symmetrical contact pressure, ensuring stable conductivity of the contact 11. Figure 2As shown, the minimum distance between the S-shaped bends 2111 on the two elastic metal sheets 211 is 0.4 to 0.6 times the thickness of the circuit board 1. If it is less than 0.4 times, the clamping force will be too large, damaging the circuit board 1. If it is greater than 0.6 times, the clamping force will be insufficient, and it will easily loosen. Therefore, 0.4 to 0.6 times balances the contact pressure and durability. Pressing the circuit board 1 into the S-shaped bends 2111 of the two elastic metal sheets 211 causes the pin 2 to undergo elastic deformation, such as... Figure 4 As shown, at this time, the S-shaped bend 2111 contacts the contact 11 on the circuit board 1 to achieve the function of conduction.

[0056] Preferably, the support portion 22 of the pin 2 is a plate-like structure, providing rigid support to prevent the pin 2 from swaying during vibration, while also facilitating precise engagement with the limiting slot 32. The pin 2 is preferably a one-piece molded structure, eliminating the contact resistance of a split structure, improving current carrying capacity, enhancing mechanical strength, and avoiding stress concentration points caused by welding or riveting.

[0057] like Figure 7 and Figure 8 As shown, the depth of the limiting groove 32 of the socket 3 is not less than the thickness of the support part 22, ensuring that the support part 22 is fully embedded and preventing axial movement caused by vibration. In addition, the limiting groove 32 is also connected to the through hole 33. In this way, the limiting groove 32 and the through hole 33 can be formed in one step, reducing mold costs and avoiding friction damage between the pin part 23 and the hole wall during insertion.

[0058] Example 2

[0059] like Figure 9 As shown, the difference from Embodiment 1 is that the S-shaped bend 2111 is changed into two V-shaped structures, which make contact and limit from both ends of the contact point 11, further improving the contact and connection stability.

[0060] Example 3

[0061] like Figure 10 and Figure 11 As shown, an automotive air conditioning actuator includes a housing 4 and a cover 5. The housing 4 houses a motor assembly 6, a gear transmission group 7, and a circuit board connector assembly as described in Embodiment 1. The housing 4 has a positioning post 41 that mates with the positioning circuit board 1. Applying a highly reliable connector assembly to the automotive air conditioning actuator solves the connection failure problem caused by vibration and temperature changes in the vehicle environment. The positioning post 41 precisely fixes the circuit board 1, preventing the mechanical stress generated by the motor assembly 6 during operation from being transmitted to the connector. The cover 5 is connected to the housing 4 via a snap-fit ​​structure. The snap-fit ​​structure includes an elastic snap 51 correspondingly disposed on the cover 5 and a mating protrusion 42 on the housing 4. The interference fit between the elastic snap 51 and the mating protrusion 42 enables tool-less assembly and disassembly, improving maintenance efficiency. The elastic buffer of the elastic snap 51 reduces the impact of resonance of the housing 4 on internal components.

[0062] Flexible clamping replaces welding, significantly reducing the probability of incomplete welds, shortening assembly time, eliminating the need for welding equipment, supporting rapid on-site replacement, and reducing after-sales costs. The pin spacing can be compressed to 1.0mm, making it suitable for compact automotive air conditioning actuators.

[0063] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A circuit board connector assembly, comprising a circuit board (1), pins (2) and a socket (3), wherein a contact (11) is provided on the upper surface of one edge of the circuit board (1), characterized in that: The pin (2) includes a clamping part (21), a supporting part (22) and a pin part (23). The clamping part (21) is elastically clamped and fixed to the contact (11) on the upper surface of the circuit board (1). The supporting part (22) is connected to the bottom of the clamping part (21). The pin part (23) extends out from one side of the supporting part (22). The socket (3) is provided with a plug groove (31), a limiting groove (32) and a through hole (33). The support part (22) is embedded in the limiting groove (32), the pin part (23) passes through the through hole (33), and the end of the circuit board (1) is inserted into the plug groove (31).

2. The circuit board connector assembly according to claim 1, characterized in that: The clamping part (21) includes two symmetrically arranged elastic metal sheets (211), and the elastic metal sheets (211) are provided with an S-shaped curved part (2111) protruding inward, and the S-shaped curved part (2111) is in elastic contact with the contact point (11).

3. The circuit board connector assembly according to claim 2, characterized in that: The minimum distance between the S-shaped bends (2111) on the two elastic metal sheets (211) is 0.4 to 0.6 times the thickness of the circuit board (1).

4. The circuit board connector assembly according to claim 1, characterized in that: The support part (22) is a plate-shaped structure.

5. The circuit board connector assembly according to claim 1, characterized in that: The pin (2) is a one-piece molded structure.

6. The circuit board connector assembly according to claim 1, characterized in that: The depth of the limiting groove (32) is not less than the thickness of the support part (22).

7. The circuit board connector assembly according to claim 6, characterized in that: The limiting slot (32) is connected to the through hole (33).

8. The circuit board connector assembly according to claim 1, characterized in that: The circuit board (1) has a U-shaped positioning notch (12) that matches the socket (3) at one end near the contact (11).

9. An automotive air conditioning actuator, comprising a housing (4) and a housing cover (5), characterized in that: The housing (4) is provided with a motor assembly (6), a gear transmission group (7) and a circuit board connector assembly as described in any one of claims 1 to 8, and the housing (4) is provided with a positioning post (41) that cooperates with the positioning circuit board (1).

10. The automotive air conditioning actuator according to claim 9, characterized in that: The cover (5) is connected to the housing (4) by a snap-fit ​​structure, which includes an elastic snap (51) correspondingly provided on the cover (5) and a mating protrusion (42) on the housing (4).

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