Large-current wiring terminal for PCB (Printed Circuit Board)

Abstract

The utility model discloses a large-current wiring terminal for a PCB, which comprises a connecting body made of metal, the upper end of the connecting body is provided with an internal thread connecting part used for connecting one end of a cable, and the lower end of the connecting body is provided with a plurality of conductive long terminals which vertically extend downwards and are used for being inserted into the PCB. The length of the conductive long terminals is larger than or equal to the thickness of the connecting body, a plurality of conductive short terminals are arranged on the lower end face of the connecting body in an array mode, the length of the conductive short terminals is smaller than the thickness of the connecting body, and the number of the conductive short terminals is larger than that of the conductive long terminals. The electric connection between the wiring terminal and the PCB is more stable and reliable by arranging the conductive long terminal and the conductive short terminal and increasing the contact area and connection points with the PCB, and the wiring terminal can pass through current up to 300A through the connection body which is made of metal and is matched with the conductive long terminal and the conductive short terminal, so that the current bearing capacity is improved, and the service life of the wiring terminal is prolonged. The service life of the product is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of terminal blocks, specifically relating to a high-current terminal block for PCB boards. Background Technology

[0002] In the field of electronic equipment manufacturing and application, PCB boards, as important carriers of electronic components, directly affect the operational stability and reliability of equipment through the performance of their terminals. Existing terminals generally use injection molding to manufacture the body, and then insert and fix conductive terminals onto the body. Electrical connection is achieved by soldering the ends of the conductive terminals to the circuit board. This conventional terminal can meet basic usage requirements when dealing with low-current transmission scenarios. However, when entering a working environment with high current, its drawbacks become increasingly apparent. Due to its design and structural limitations, the charge throughput is low. Under normal circumstances, the maximum current that existing terminals can withstand is insufficient to meet the needs of high-current paths. When a high current continues to pass through, the terminals are prone to generating a large amount of heat due to excessive load, causing a rapid increase in temperature. Excessive temperature can not only cause the injection-molded plastic body to melt and deform, leading to displacement of the conductive terminals and seriously affecting the electrical connection performance of the product, but also significantly shorten the product's service life and even cause safety hazards. Utility Model Content

[0003] The purpose of this utility model is to address the above-mentioned problems by providing a high-current terminal block for PCB boards, thus solving the problem that existing connection terminals cannot be used continuously with high current.

[0004] This utility model is achieved through the following technical solution: a high-current terminal block for PCB boards, comprising a connecting body made of metal, wherein the upper end of the connecting body is provided with an internally threaded connecting part for connecting one end of a cable, and the lower end of the connecting body is provided with a plurality of downwardly extending conductive long terminals for insertion into the PCB board, wherein the length of the conductive long terminals is greater than or equal to the thickness of the connecting body, and a plurality of conductive short terminals are arrayed on the lower end surface of the connecting body, wherein the length of the conductive short terminals is less than the thickness of the connecting body, and the number of conductive short terminals is greater than the number of conductive long terminals.

[0005] Furthermore, the conductive long terminals are arranged in a rectangular array on the lower end surface of the connecting body and surround the outer side of the conductive short terminals, with the outermost conductive long terminals being set close to the perimeter of the lower end surface of the connecting body.

[0006] Furthermore, the conductive short terminals are also arranged in a rectangular array on the lower end face of the connecting body.

[0007] Furthermore, the distribution density of the conductive short terminals is twice that of the conductive long terminals.

[0008] Furthermore, the internally threaded connection is made of metal.

[0009] Furthermore, the connecting body, the internal threaded connecting part, the conductive long terminal, and the conductive short terminal are integrally formed.

[0010] The lower end of the terminal block of this invention is vertically extended downwards and fixed to the PCB board via a conductive long terminal, while a conductive short terminal is soldered to the surface of the PCB board. The upper end is secured to the copper lug terminal of one end of the cable via a bolt structure, thus achieving electrical connection between the cable and the PCB board. By setting the length of the conductive long terminal at the lower end of the terminal block to be greater than or equal to the thickness of the connecting body, and simultaneously having an array of conductive short terminals on the lower end face, this multi-terminal design increases the contact area and connection points with the PCB board, making the electrical connection between the terminal block and the PCB board more stable and reliable. This reduces problems such as overheating and increased resistance caused by poor contact. By using a metal connecting body, combined with the conductive long and short terminals, the terminal block can handle currents up to 300A, greatly improving its high-current carrying capacity and better meeting the needs of high-current circuits. Furthermore, the metal connecting body has better heat resistance, effectively preventing displacement and deformation of the conductive terminals, ensuring long-term stable operation of the product under high-current working conditions, and extending the product's service life. Attached Figure Description

[0011] Figure 1 This utility model has a three-dimensional structure with its bottom surface facing upwards. Figure 1 ;

[0012] Figure 2 This utility model has a three-dimensional structure with its bottom surface facing down. Figure 2 .

[0013] The attached figures are labeled as follows:

[0014] 1. Connecting body; 2. Internal threaded connection part; 3. Conductive long terminal; 4. Conductive short terminal. Detailed Implementation

[0015] The present invention will be further illustrated below with reference to specific examples and accompanying drawings.

[0016] like Figures 1-2As shown, this utility model describes a high-current terminal block for PCB boards, comprising a metal connecting body 1. The upper end of the connecting body 1 is provided with an internally threaded connecting part 2 for connecting one end of a cable. The lower end of the connecting body 1 is provided with a plurality of conductive long terminals 3 extending vertically downward and inserted into the PCB board. The length of the conductive long terminals 3 is greater than or equal to the thickness of the connecting body 1. A plurality of conductive short terminals 4 are also arrayed on the lower end surface of the connecting body 1. The length of the conductive short terminals 4 is less than the thickness of the connecting body 1, and the number of conductive short terminals 4 is greater than the number of conductive long terminals 3.

[0017] During installation, the lower end of the terminal block of this utility model is vertically extended downwards by conductive long terminal 3 and inserted and fixed inside the PCB board. Conductive short terminal 4 is soldered to the surface of the PCB board. The upper end is fixed to the copper lug terminal block of one end of the cable on the internal threaded connection part 2 by a bolt structure, thereby realizing the electrical connection between the cable and the PCB board. By setting the length of the conductive long terminal 3 at the lower end of the terminal block to be greater than or equal to the thickness of the connecting body 1, and at the same time having an array of conductive short terminals 4 on the lower end face, this multi-terminal design increases the contact area and connection points with the PCB board, making the electrical connection between the terminal block and the PCB board more stable and reliable, reducing problems such as heat generation and increased resistance caused by poor contact. By using a metal connecting body 1, in conjunction with conductive long terminal 3 and conductive short terminal 4, the terminal block can carry currents up to 300A, greatly improving the high current carrying capacity and better meeting the usage requirements of high current paths. Moreover, the metal connecting body 1 has better heat resistance, which can effectively prevent the conductive terminals from shifting and deforming, ensuring the long-term stable operation of the product under high current working environment and extending the service life of the product.

[0018] In this embodiment of the invention, the conductive long terminals 3 are arranged in a rectangular array on the lower end face of the connecting body 1, with the outermost conductive long terminals 3 closely attached to the perimeter of the lower end face of the connecting body 1. This rectangular array arrangement of the conductive long terminals 3 ensures that the external force received by the terminals is evenly distributed when connected to the PCB board. When the PCB board is subjected to external forces such as vibration or impact, each conductive long terminal 3 shares the force, avoiding excessive localized stress and effectively reducing the risk of loosening or breakage at the connection point. The outermost conductive long terminals 3, arranged close to the edge, enhance the connection strength between the terminals and the edge of the PCB board, making the entire connection structure more stable and maintaining a reliable connection even in harsh working environments.

[0019] Furthermore, the conductive short terminals 4 are also arranged in a rectangular array on the lower end face of the connecting body 1. The rectangular array arrangement of the conductive short terminals 4 significantly increases the number of contact points between the conductive short terminals 4 and the PCB board. When a large current passes through, the numerous contact points can evenly distribute the current, avoiding excessive current concentration, thereby improving the charge throughput of the terminals and allowing the product to operate stably in high-current scenarios. For example, in the PCB board connection of car charging piles, it can effectively cope with the high current transmission requirements.

[0020] In this embodiment of the invention, the distribution density of the conductive short terminals 4 is twice that of the conductive long terminals 3. The increased number of conductive short terminals 4 increases the contact area with the PCB board. Based on the inverse relationship between resistance and contact area, this effectively reduces contact resistance, improves energy efficiency, and lowers equipment energy consumption. Furthermore, when a large current flows through the terminal block, the higher distribution density of the conductive short terminals 4 provides more current conduction paths. This not only reduces the current load on a single terminal but also efficiently conducts current, ensuring a uniform distribution of current between the terminal block and the PCB board, thus preventing localized overheating due to excessive current concentration.

[0021] In this embodiment of the utility model, the internal threaded connection part 2 is made of metal material. The metal material ensures a stable electrical connection between the internal threaded connection part 2 and the cable, effectively preventing current fluctuations caused by poor contact. Furthermore, due to the high strength and hardness of the metal material, the internal threaded connection part 2 can withstand greater tension and torque when tightening the cable, avoiding loosening or detachment of the connection due to external force.

[0022] In this embodiment of the utility model, the connecting body 1, the internal threaded connecting part 2, the conductive long terminal 3, and the conductive short terminal 4 are integrally formed, and the entire terminal forms a continuous conductive path. During the current transmission process, there is no need to cross multiple contact points, which reduces resistance and reduces power loss. It can transmit large currents more efficiently and ensure the stable operation of the equipment under high current working conditions. At the same time, the overall structure is more stable, avoiding connection failures caused by loose or separated parts, and effectively extending the service life of the product.

[0023] The above embodiments are merely preferred embodiments of the present utility model and are only used to explain the present utility model, not to limit the present utility model. Any changes, substitutions, combinations, simplifications, modifications, etc., made by those skilled in the art without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A large current terminal for PCB boards, characterized by: The application relates to a connecting body (1) made of metal, the upper end of the connecting body (1) is provided with an inner threaded connecting part (2) for connecting one end of a cable, the lower end of the connecting body (1) is provided with a plurality of downward vertically-extended conductive long terminals (3) for being inserted into a PCB, the length of the conductive long terminal (3) is greater than or equal to the thickness of the connecting body (1), a plurality of conductive short terminals (4) are also arranged on the lower end surface of the connecting body (1), the length of the conductive short terminal (4) is less than the thickness of the connecting body (1), and the number of the conductive short terminals (4) is more than that of the conductive long terminals (3).

2. A high current terminal for a PCB board according to claim 1, characterized in that: The conductive long terminals (3) are arranged in a rectangular array on the lower end surface of the connecting body (1) and surround the outer side of the conductive short terminals (4), and the outermost conductive long terminals (3) are arranged close to the four peripheral edges of the lower end surface of the connecting body (1).

3. A high current terminal for a PCB board according to claim 2, characterized in that: The conductive short terminals (4) are also arranged in a rectangular array on the lower end surface of the connecting body (1).

4. The high current terminal for a PCB board of claim 2, wherein: The distribution density of the conductive short terminals (4) is twice that of the conductive long terminals (3).

5. The high current terminal for a PCB board of claim 1, wherein: The inner threaded connecting part (2) is made of metal.

6. A high current terminal for a PCB board according to claim 1, characterized in that: The connecting body (1), the inner threaded connecting part (2), the conductive long terminals (3) and the conductive short terminals (4) are integrally formed.

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