PCB fast charging terminal

Abstract

The utility model relates to a PCB fast charging terminal, a welding pin is led out from the lower end of a pedestal, two opposite side edges of the upper end of the pedestal extend upwards in the same direction to form support arms, the support arms are bent inwards to obtain a first elastic sheet part and a second elastic sheet part, and the bent tail end of the second elastic sheet part is close to the corresponding inner side fixing wall of the pedestal; a butt joint space is formed between the supporting arms on the two side edges of the upper end of the base, and when the butt joint space receives the inserted external terminal, the bent tail end of the second elastic piece part abuts against the corresponding inner side fixing wall of the base, so that the second elastic piece part assists the first elastic piece part to clamp the external terminal. According to the utility model, the insertion resistance of the external terminal is small, the insertion force is reduced, and the male and female terminals are prevented from being scratched during insertion; and the bent tail end of the second elastic sheet part is supported on the corresponding inner side fixing wall of the base, so that positioning support is added, the contact part and the contact impedance after the external terminal is inserted are more stable, the influence caused by vibration of a finished product is reduced, and the electrical transmission efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connectors, in particular to a terminal installed on a PCB circuit board. Background Art

[0002] As the application fields of electrical connectors continue to expand, electrical connectors are also used in some high-power occasions that need to transmit large currents to achieve the connection and disconnection of electrical circuits, which has prompted the emergence of high-current electrical connectors.

[0003] High-current connectors are widely used in electric vehicles, electric forklifts, UPS, general power supplies, medical equipment, solar energy and new energy. In order to meet the fast charging requirements of high-current transmission, the high-current connectors in the prior art usually increase the contact surface of the terminal, which increases the insertion and extraction force, increases the friction between the male and female terminals, and has a relatively short service life; if the insertion and extraction force is reduced, it will affect the plugging stability between the male and female terminals, so further improvement is needed. Summary of the invention

[0004] The purpose of the utility model is to provide a PCB fast charging terminal with a simple and compact structure, which reduces the insertion force, avoids scratches on the male and female terminals when they are plugged in, and can make the contact position and contact impedance of the external terminal more stable after insertion.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A PCB fast charging terminal comprises a base, a welding foot is led out from the lower end of the base, and arms are extended upward in the same direction on the two opposite sides of the upper end of the base, and the arms are bent inward to obtain a first spring sheet portion and a second spring sheet portion, and the bent end of the second spring sheet portion is close to the corresponding inner fixed wall of the base; a docking space is formed between the arms on the two side edges of the upper end of the base, and when the docking space receives an inserted external terminal, the bent end of the second spring sheet portion is supported on the corresponding inner fixed wall of the base, so that the second spring sheet portion assists the first spring sheet portion in clamping the external terminal.

[0007] The above scheme is further that the base is a hollow body enclosed by a plate material, and two or more arms are arranged on both sides of the upper end of the base at intervals according to the contour lines of the corresponding sides, and the arms are stamped together with the base.

[0008] The above solution is further characterized in that the width of the first elastic sheet portion is greater than the width of the second elastic sheet portion in the same direction.

[0009] The above solution is further characterized in that a nickel-plated layer is provided on the surface of at least the first elastic sheet portion and the second elastic sheet portion of the support arm.

[0010] The above scheme is further that the docking space leaves a docking seam width with a certain starting gap value, and the ratio of the starting gap value to the thickness of the external terminal in the same direction is 1:4.

[0011] The PCB fast charging terminal provided by the utility model is designed with a support arm, and the first spring piece part and the second spring piece part are obtained by extending and bending the support arm, and a docking space is formed between the support arms on both side edges of the upper end of the base; the bent end of the second spring piece part is close to the corresponding inner fixed wall of the base to form a cantilever shape, so that the resistance encountered in the process of inserting the external terminal into the docking space is small, the insertion force is reduced, and scratches on the male and female terminals are avoided when plugging; and when the external terminal is inserted into place, the bent end of the second spring piece part is supported on the corresponding inner fixed wall of the base to increase the positioning support, so that the second spring piece part assists the first spring piece part in clamping the external terminal, so that the contact position and contact impedance after the external terminal is inserted are more stable, the influence caused by the vibration of the finished product is reduced, and the electrical transmission efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the utility model;

[0013] Attached Figure 2 for Figure 1 A partial structural cross-sectional view of an embodiment;

[0014] Attached Figure 3 for Figure 1 A schematic diagram of plug-in use of an embodiment;

[0015] Attached Figure 4 for Figure 3 Schematic diagram after plugging in;

[0016] Attached Figure 5 for Figure 4 Enlarged view of the local structure. DETAILED DESCRIPTION

[0017] The concept, specific structure and technical effects of the utility model will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the utility model.

[0018] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] See also Figures 1 to 5 The figure shows a schematic diagram of a preferred embodiment of the utility model. The utility model is related to a PCB fast charging terminal, which has a base 1. The base 1 is made by stamping a plate and has corresponding conductivity. Preferably, the base 1 is a hollow body enclosed by a plate, and has a spatial structure with better stability, which is convenient for plugging and use. The lower end of the base 1 leads to a welding foot 11, which is used for upper plate welding, so that the utility model can be installed on a corresponding circuit board (PCB board) for transmission of electric energy, signals, data, etc. The upper end of the base 1 has an arm 12 extending upward in the same direction on both sides of the opposite sides, and the arm 12 is bent inward to obtain a first spring piece part 121 and a second spring piece part 122. The bent end 1221 of the second spring piece part 122 is close to the corresponding inner fixed wall of the base 1, so that the first spring piece part 121 and the second spring piece part 122 become a cantilevered body. A docking space 3 is formed between the support arms 12 on both side edges of the upper end of the base. When the docking space 3 receives the inserted external terminal 2, the bent end 1221 of the second spring piece portion 122 is supported on the corresponding inner fixed wall of the base 1, so that the second spring piece portion 122 assists the first spring piece portion 121 in clamping the external terminal 2 to obtain a contact and conductive connection.

[0020] Specifically, in this embodiment, the external terminal 2 is a male terminal, and the contact terminal of the utility model is a female terminal; since the bent end 1221 of the second spring piece part is close to the corresponding inner fixed wall of the base, it forms a cantilever shape, and thus in the process of inserting the external terminal 2 into the docking space 3, the docking space 3 is gradually opened by utilizing the elasticity of the first spring piece part 121 to match the size of the external terminal 2. At this time, the resistance to the insertion of the external terminal 2 is small, the insertion force is reduced, and the male and female terminals are prevented from being scratched during the insertion, thereby extending the service life; and when the external terminal 2 is inserted into place, the bent end 1221 of the second spring piece part is supported on the corresponding inner fixed wall of the base, increasing the positioning support, so that the second spring piece 122 part assists the first spring piece 121 part in clamping the external terminal 2, so that the contact position and contact impedance of the external terminal after insertion are more stable, reducing the influence caused by the vibration of the finished product, and improving the electrical transmission efficiency. This structural design can increase the contact surface between the terminals while obtaining a smaller insertion force, thereby improving the usability.

[0021] Figure 1 , 2As shown, in this embodiment, two or more arms 12 are arranged at intervals on both sides of the upper end of the base according to the contour lines of the corresponding sides, thereby extending in the corresponding direction to increase the contact surface of the terminal, improve the conductivity, and meet the actual needs of transmitting large currents. In this embodiment, the welding foot 11, the arm 12 and the base 1 are stamped together, and the one-piece structure has good structural properties, stability and durability. Furthermore, the arm 12 is provided with a nickel plating layer on the surface of at least the first spring piece part 121 and the second spring piece part 122, and the thickness of the nickel plating layer is 2~4μm, thereby increasing the surface hardness of the first spring piece part 121 and the second spring piece part 122, and improving the plug-in resistance.

[0022] Figure 2 As shown, in this embodiment, the width of the first spring piece portion 121 is greater than the width of the second spring piece portion 122 in the same direction, thereby obtaining sufficient support without changing the holding force, reducing the plugging and unplugging force, and reducing the impact caused by the vibration of the finished product, thereby ensuring the stability of the contact position and contact impedance after the external terminal is inserted. In this embodiment, when the external terminal 2 is inserted into place, the bent end 1221 of the second spring piece portion just supports the corresponding inner fixed wall of the base, achieving support while reducing the plugging and unplugging force. At the same time, the elasticity of the second spring piece portion can increase the buffer and reduce the scratches on the male and female terminals when plugging.

[0023] Figures 1 to 4 As shown, in this embodiment, the docking space 3 is reserved with a certain starting gap value in advance to improve the plug-in effect; preferably, the ratio of the starting gap value to the thickness of the external terminal 2 in the same direction is 1:4. Figure 3 As shown, the thickness of the external terminal 2 of this embodiment in the same direction is 0.8 mm. At this time, the starting gap value of the joint width is 0.2 mm, which can further reduce the insertion force while meeting the plug-in conduction requirements of the male and female terminals.

[0024] The PCB fast charging terminal provided by the utility model is designed with a support arm, and the first spring piece part and the second spring piece part are obtained by extending and bending the support arm, and a docking space is formed between the support arms on both side edges of the upper end of the base; the bent end of the second spring piece part is close to the corresponding inner fixed wall of the base to form a cantilever shape, so that the resistance encountered in the process of inserting the external terminal into the docking space is small, the insertion force is reduced, and scratches on the male and female terminals are avoided when plugging; and when the external terminal is inserted into place, the bent end of the second spring piece part is supported on the corresponding inner fixed wall of the base to increase the positioning support, so that the second spring piece part assists the first spring piece part in clamping the external terminal, so that the contact position and contact impedance after the external terminal is inserted are more stable, the influence caused by the vibration of the finished product is reduced, and the electrical transmission efficiency is improved.

[0025] Although the preferred specific embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention should not be limited to the structures and operations that are exactly the same as the above description and the accompanying drawings. For those skilled in the art, many equivalent improvements and changes can be made to the above embodiments through logical analysis, reasoning or limited experiments without exceeding the concept and scope of the present invention, but these improvements and changes should all fall within the scope of protection required by the present invention.

Claims

1. PCB fast charging terminal, characterized in that: A base (1) is provided, the lower end of the base (1) leading out a welding foot (11), and arms (12) extending upward in the same direction on opposite sides of the upper end of the base (1), and the arms (12) are bent inwardly to obtain a first spring sheet portion (121) and a second spring sheet portion (122), and the bent end (1221) of the second spring sheet portion (122) is close to a corresponding inner fixed wall of the base (1); a docking space (3) is formed between the arms (12) on the two sides of the upper end of the base, and when the docking space (3) receives an inserted external terminal (2), the bent end (1221) of the second spring sheet portion (122) is supported on the corresponding inner fixed wall of the base (1), so that the second spring sheet portion (122) assists the first spring sheet portion (121) in clamping the external terminal (2).

2. The PCB fast charging terminal according to claim 1, characterized in that: The base (1) is a hollow body enclosed by a plate material, and two or more supporting arms (12) are arranged at intervals on both sides of the upper end of the base according to the contour lines of the corresponding side edges, and the supporting arms (12) are stamped together with the base (1).

3. The PCB fast charging terminal according to claim 1, characterized in that: The width of the first elastic sheet portion (121) is greater than the width of the second elastic sheet portion (122) in the same direction.

4. The PCB fast charging terminal according to claim 1 or 2, characterized in that: A nickel-plated layer is provided on the support arm (12) at least on the surface of the first elastic sheet portion (121) and the second elastic sheet portion (122).

5. The PCB fast charging terminal according to claim 1, characterized in that: The butt joint space (3) has a butt joint width with a certain starting gap value, and the ratio of the starting gap value to the thickness of the external terminal (2) in the same direction is 1:4.

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