Connecting mechanism of circuit board and terminal

Abstract

The utility model discloses a connecting mechanism of a circuit board and a terminal, so as to improve the reliability and conductivity of connection. Comprising a circuit board and terminals, the circuit board is provided with a plurality of mounting holes, sleeves are embedded and fixed in the mounting holes, the sleeves axially extend outwards along the hole walls of the mounting holes and protrude to the outer surface of the circuit board, and the sleeves and the mounting holes are welded and fixed; and the terminal is inserted into the cylinder sleeve along the axial direction of the cylinder sleeve. As the sleeve axially extends outwards and protrudes out of the surface of the circuit board, physical contact points are added to the extension part, which means that a larger contact area can be formed between the terminal and the sleeve, the current transmission efficiency and the conductivity are improved, and data transmission errors caused by poor contact can be reduced; and moreover, better support is provided on the structure, a good contact state can be kept even in a vibration environment, and fixation on connection is enhanced, so that the reliability of the whole connection structure is improved.

Description

Technical Field

[0001] This utility model relates to a connection mechanism between a circuit board and terminals. Background Technology

[0002] Nowadays, with the miniaturization and multifunctionality of electronic devices, the integration of components on circuit boards is increasing, leading to higher requirements for manufacturing precision and reliability. Currently, a common practice for power and signal terminals on circuit boards such as charging docks and connectors is to embed cylindrical rings into the power and signal terminal holes of the circuit board, and then insert the terminals into these cylindrical rings and solder them to achieve a fixed connection between the circuit board and the terminals. However, the existing cylindrical ring connection method has the following limitations:

[0003] 1. Insufficient electrical contact area: Since the length of the cylinder ring is basically the same as the thickness of the circuit board, the contact area between the terminal and the cylinder ring is small, which limits the efficiency of current transmission.

[0004] 2. Limited connection strength: The design of the cylinder ring is prone to loosening during frequent insertion and removal, especially in vibrating environments. The cylinder ring may not be able to provide sufficient contact support, resulting in poor contact or an insufficiently firm connection, which will affect the reliability of this connection method. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies, such as insufficient electrical contact area and limited connection strength. This invention provides a connection mechanism between a circuit board and a terminal to improve the reliability and conductivity of the connection.

[0006] The technical solution of this utility model: The connection mechanism between the circuit board and the terminal includes a circuit board and a terminal. The circuit board has a plurality of mounting holes. A sleeve is embedded and fixed in the mounting holes. The sleeve extends outward along the wall of the mounting hole and protrudes to the outer surface of the circuit board. The sleeve is welded and fixed to the mounting hole. The terminal is inserted into the sleeve along the axial direction of the sleeve.

[0007] By adopting the above technical solution, since the sleeve extends outward axially and protrudes from the circuit board surface, the extended part increases the physical contact points. This means that the terminal can form a larger contact area with the sleeve, thereby improving the efficiency of current transmission and conductivity, and also helping to reduce data transmission errors caused by poor contact. In addition, it provides better structural support, and can maintain a good contact state even in a vibration environment, strengthening the fixation of the connection. Therefore, the reliability of the overall connection structure is improved.

[0008] In one possible design, a retaining ring is protruding from the outer surface of the sleeve, and the retaining ring abuts against the opening of the mounting hole to form a limiting fit.

[0009] With the above design, the presence of the retaining ring can prevent the terminal from going too deep into the sleeve during insertion, ensuring the accuracy of terminal insertion. In addition, the contact between the retaining ring and the mounting hole opening can prevent the sleeve from tilting and provide effective guiding support for the sleeve.

[0010] In one possible design, the outer circumference of the terminal is integrally ring-shaped with several protrusions, the surface of the protrusions is arc-shaped, and the protrusions are in contact with the inner wall of the sleeve.

[0011] With the above design, the contact between the protrusion and the inner wall of the sleeve provides multiple contact points. Compared with smooth surface contact, this method can increase the reliability of contact, ensure more stable current or signal transmission, and the protrusion can increase the friction between the terminal and the sleeve, making the terminal less likely to loosen after insertion, which is especially suitable for vibration environments.

[0012] In one possible design, a lantern spring is mounted on the outer peripheral surface of the terminal, and the outer surface of the lantern spring is in elastic contact with the inner wall of the sleeve.

[0013] With the above design, the lantern spring can provide continuous elastic pressure, ensuring that the terminal and the sleeve always maintain a tight contact, reducing contact resistance, thereby improving conductivity and enhancing connection stability, and reducing poor contact caused by loosening.

[0014] In one possible design, a cone is integrally formed on the outer peripheral surface of the terminal, and the cone abuts against the opening on one side of the sleeve.

[0015] With the above design, the tapered auxiliary terminal automatically aligns with the center position when inserted into the sleeve. Even if the insertion angle is slightly off, the tapered body can guide the terminal into the correct track. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model;

[0017] Figure 2 This is an exploded view of a specific embodiment of the present utility model;

[0018] Figure 3 This is a perspective sectional view of another embodiment of the present invention;

[0019] Figure 4 This utility model Figure 3 A magnified view of a section at point A in the middle;

[0020] Figure 5 This is an exploded view of another embodiment of the present invention;

[0021] Among them, 1 is the circuit board; 11 is the mounting hole;

[0022] 2. Terminal; 21. Protrusion; 22. Lantern spring; 23. Cone;

[0023] 3. Sleeve; 31. Retaining ring. Detailed Implementation

[0024] like Figure 1 , Figure 2 The circuit board and terminal connection mechanism shown includes a circuit board 1 and terminals 2. Several mounting holes 11 are pre-drilled on the circuit board 1. The size and position of the mounting holes 11 are designed according to actual needs to ensure that the sleeve 3 can be accurately embedded within them. A hollow sleeve 3 is embedded and fixed within the mounting holes 11. The sleeve 3 is placed inside the mounting holes 11 and fixed to the circuit board 1 by welding, ensuring that the sleeve 3 will not detach from the circuit board 1 due to external force. The sleeve 3 also extends axially outward along the wall of the mounting holes 11 and protrudes to the outer surface of the circuit board 1, with an extension length of at least 3 mm. The fixing between the sleeve 3 and the mounting holes 11 is achieved by welding. This connection method not only ensures a tight fit between the sleeve 3 and the circuit board 1 but also improves the mechanical strength of the entire connection structure. Terminals 2 are inserted axially along the sleeve 3 and contact the inner wall of the sleeve 3 to form an electrical connection. The extended portion of the sleeve 3 is designed to increase the contact area with the terminal 2, improving current transmission efficiency and conductivity, and providing better mechanical support. It maintains good contact even in vibrating environments, strengthening the connection's stability. The extended sleeve 3 makes alignment easier during assembly, especially for automated assembly lines. The longer sleeve 3 provides clear visual cues, facilitating machine vision system recognition and operation.

[0025] A retaining ring 31 is protruding from the outer surface of the sleeve 3. The retaining ring 31 is integrally formed with the sleeve 3. The retaining ring 31 can limit the insertion depth of the terminal 2 to ensure that the terminal 2 is correctly inserted. The retaining ring 31 abuts against the mounting hole 11 on the front side of the circuit board 1 to prevent the sleeve 3 from tilting and to provide guiding support.

[0026] At least eight protrusions 21 are integrally formed on the outer circumference of terminal 2. The surfaces of the protrusions 21 are arc-shaped or bracket-shaped, and the surfaces of the protrusions 21 are in close contact with the inner wall of the sleeve 3. The shape of the protrusions 21 guides the insertion of terminal 2 and provides multiple contact points to increase the reliability of the contact. The protrusions 21 can increase the friction between terminal 2 and sleeve 3, making terminal 2 less prone to loosening after insertion, which is especially suitable for vibration environments.

[0027] A cone 23 is integrally formed on the outer circumferential surface of terminal 2. The diameter of cone 23 gradually decreases towards the insertion direction of terminal 2, and cone 23 abuts against the opening on the insertion side of sleeve 3. When cone 23 abuts against the opening on one side of sleeve 3, it can provide a stable support point, making terminal 2 less prone to shaking inside sleeve 3, helping terminal 2 to automatically align with the center position, thereby improving the stability of the connection.

[0028] Another embodiment: Unlike the embodiments described above, as follows... Figures 3-5 As shown, a lantern spring 22 is mounted on the outer circumferential surface of terminal 2, and the outer surface of the lantern spring 22 is in elastic contact with the inner wall of the sleeve 3. The lantern spring 22 has a lantern-shaped spring body with several outwardly protruding arched spring plates on its periphery, so that the lantern spring 22 can always maintain a certain elastic tightness with the inner wall of the sleeve 3, ensuring that the terminal 2 and the sleeve 3 always maintain a tight contact. The elastic contact can compensate for manufacturing tolerances and absorb minor displacements caused by mechanical stress or thermal expansion, thereby enhancing the stability of the connection and reducing poor contact caused by loosening. When terminal 2 is inserted or removed from the sleeve 3, a certain resistance is generated, providing clear feedback to the user, letting the user know that terminal 2 has been correctly installed.

Claims

1. A connecting mechanism of a circuit board and a terminal, comprising a circuit board and a terminal, a plurality of mounting holes are formed on the circuit board, characterized in that: The mounting hole is embedded with a sleeve, the sleeve extends outward along the hole wall of the mounting hole and protrudes to the outer surface of the circuit board, and the sleeve is welded with the mounting hole; the terminal is inserted into the sleeve along the axial direction of the sleeve. ​ 2. The connection mechanism of a circuit board and a terminal according to claim 1, characterized by: The outer surface of the sleeve is provided with a stop ring, and the stop ring abuts against the hole of the mounting hole to form a limiting fit.

3. The connection mechanism of a circuit board and a terminal according to claim 1, characterized by: The outer periphery of the terminal is integrally provided with a plurality of protrusions, the surface of the protrusion is arc-shaped, and the protrusion is in contact with the inner wall of the sleeve.

4. The connection mechanism of a circuit board and a terminal according to claim 1, characterized by: A lamp spring is mounted on the outer periphery of the terminal, and the outer surface of the lamp spring is in elastic contact with the inner wall of the sleeve.

5. The connection mechanism of a circuit board and a terminal according to claim 3 or 4, characterized in that: A cone is further integrally arranged on the outer periphery of the terminal, and the cone abuts against the side opening of the sleeve.

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