Plug terminal structure and high-voltage direct-current relay

Abstract

The invention relates to the technical field of relays, in particular to a plug terminal structure and a high-voltage direct-current relay, the plug terminal structure comprises a control panel, an auxiliary contact connecting plate, a first pin and a second pin, the control panel is vertically arranged, and a first bonding pad is arranged at the upper end of the control panel; the first end of the auxiliary contact connecting plate is electrically connected with an auxiliary contact, the second end of the auxiliary contact connecting plate extends to the position above the control panel and is provided with a second bonding pad and a via hole, and the via hole is insulated from the auxiliary contact connecting plate; the first contact pin penetrates through the via hole and then is welded with the first bonding pad, the second contact pin is welded with the second bonding pad, the first bonding pad is used for electrically connecting the first contact pin with the control panel, and the second bonding pad is used for electrically connecting the second contact pin with the auxiliary contact connecting plate; and the end part of the auxiliary contact connecting plate extends to the upper part of the control panel, so that a conventional connecting curved needle seat is replaced, the number of parts of the plugging terminal is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage DC relays, and particularly relates to a plug-in terminal structure and a high-voltage DC relay. Background Art

[0002] A high-voltage DC relay is an electrical device used to control a high-voltage circuit. Its function is to switch or protect various devices or components in the high-voltage circuit by controlling the closing or opening of the circuit, ensuring the stable operation of the system.

[0003] When no excitation voltage is applied to the electromagnetic drive part of the high-voltage DC relay, no current flows through the coil, and the corresponding electromagnetic drive part does not generate magnetic flux. The armature in the rotating mechanism is in the initial state under the reaction force of the spring. The electrodes in the high-voltage cavity are connected through the contact piece to form a circuit. When an excitation voltage is applied to the electromagnetic drive part, current flows through the coil, the electromagnetic drive part generates magnetic flux, the armature in the rotating mechanism overcomes the reaction force of the spring, and the armature is attracted. At this time, the contact piece rotates accordingly, separates from the electrode NC, turns to the electrode NO, and finally connects to the NO electrode.

[0004] Among them, the plug-in terminals of the existing high-voltage DC relays are as shown in the attached Figure 1 As described, the top surface and the side surface of the ceramic 1 are respectively provided with a first circuit board 11 and a second circuit board 12. The first circuit board 11 and the second circuit board 12 are respectively provided with two groups of first bent pins 13 and second bent pins 14. A connecting bent pin seat 15 is arranged on the second circuit board 12. The first bent pins 13 pass through the second circuit board 12 and are arranged on the connecting bent pin seat 15. The second bent pins 14 are arranged on the connecting bent pin seat 15 to fix the first bent pins 13 and the second bent pins 14. And due to the terminal position requirements of the connection port, the same-group first bent pins 13 and the same-group second bent pins 14 are diagonally distributed, so that the structures of the four bent pins are different. During the production process, four types of bent pins need to be produced, and specific bent pins need to be installed at specific positions, resulting in poor production and assembly efficiency. And the connecting bent pin seat 15 causes the overall weight of the connecting terminal to be relatively large, the material consumption to be relatively large, and the production cost to be relatively large. Summary of the Invention

[0005] The purpose of the present invention is to provide a plug-in terminal structure and a high-voltage DC relay, aiming to improve the problems of the existing complex plug-in terminal structure and many types of bent pins.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A plug-in terminal structure includes a control board, an auxiliary contact connection board, a first pin and a second pin. The control board is arranged vertically, and a first pad is provided at its upper end. The first end of the auxiliary contact connection board is electrically connected to the auxiliary contact, and its second end extends above the control board and is provided with a second pad and a via hole, and the via hole is insulated from the auxiliary contact connection board. The first pin passes through the via hole and is welded to the first pad, and the second pin is welded to the second pad.

[0008] Further, the via hole is plated with metal, and at least part of the insertion section of the first pin in the via hole is welded to the via hole.

[0009] Further, a third pad is also provided at the upper end of the control board, and the third pad is insulated from the control board. The second pad is a plug-in hole, and the second pin has an extension section that extends out of the plug-in hole and extends to the third pad and is welded to the third pad.

[0010] Further, the first pad and the third pad are arranged in a horizontal straight line.

[0011] Further, the first pin and the second pin are in an L shape, and are both divided into long pins and short pins according to the length of the corner section of the L shape. The specifications of each long pin are the same, and the specifications of each short pin are the same.

[0012] Further, a supporting groove is provided at the top edge of the control board to support the second end of the auxiliary contact connection board.

[0013] Further, a positioning notch adapted to the width of the supporting groove is provided at the second end of the auxiliary contact connection board to realize its positioning on the supporting groove.

[0014] Further, the first end of the auxiliary contact connection board is smaller than its second end, and two first pads corresponding to the auxiliary contact are provided. The first line electrically connecting one of the auxiliary contacts is drawn along the upper side of the auxiliary contact connection board to one of the first pads, and the second line electrically connecting the other of the auxiliary contacts is drawn along the lower side of the auxiliary contact connection board to the other of the first pads.

[0015] Further, an avoidance groove corresponding to the second line is provided at the top end of the control board.

[0016] To achieve the above object, the present invention also adopts the following technical solution:

[0017] A high-voltage DC relay includes a plug-in terminal structure, and the plug-in terminal structure is the above plug-in terminal structure.

[0018] After adopting the above technical solution, compared with the background technology, the present invention has the following advantages:

[0019] 1. The first pad is used for the electrical connection between the first pin and the control board, and the second pad is used for the electrical connection between the second pin and the auxiliary contact connection board. Vias are provided on the auxiliary contact connection board for the first pin to turn and weld with the first pad, so that there is only a passing-through relationship between the first pin and the auxiliary contact connection board, and there is no electrical connection relationship. The end of the auxiliary contact connection board extends above the control board, replacing the conventional connection bent pin base, reducing the number of components of the plug-in terminal and the production cost.

[0020] 2. The first pad and the third pad are arranged in a horizontal straight line, so that the vertical heights of the first pin and the second pin below the auxiliary contact connection board are the same, reducing the dimensional difference between the first pin and the second pin, making the sizes of the first pin and the second pin the same, and facilitating production. Further, the first pin and the second pin are in an L shape, and are divided into long pins and short pins according to the lengths of the corner segments of the L shape. The specifications of all the long pins are the same, and the specifications of all the short pins are the same. This makes there be only two sizes for the first pin and the second pin, reducing the production difficulty. At the same time, during assembly, only the positions between the long pins and the short pins need to be correspondingly distinguished, effectively reducing the assembly difficulty and improving the production and assembly efficiency. Description of the Drawings

[0021] Figure 1 Schematic diagram of the prior art structure of the plug-in terminal structure described in the present invention;

[0022] Figure 2 First schematic diagram of the plug-in terminal structure described in the present invention;

[0023] Figure 3 Second schematic diagram of the plug-in terminal structure described in the present invention.

[0024] Description of the reference numerals:

[0025] 1. Ceramic; 11. First circuit board; 12. Second circuit board; 13. First bent pin; 14. Second bent pin; 15. Connection bent pin base; 16. Auxiliary contact;

[0026] 2. Control board; 21. First pad; 22. Third pad; 23. Supporting groove; 24. Avoidance groove;

[0027] 3. Auxiliary contact connection board; 31. Second pad; 32. Via; 33. Positioning notch; 34. First circuit;

[0028] 4. First pin; 41. Long pin; 42. Short pin;

[0029] 5. Second pin. Detailed Embodiments

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] In addition, it should be noted that: the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0032] When an element is referred to as "fixed to" or "disposed on" or "provided on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] Unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0034] Embodiment

[0035] Please refer to Figure 2 and Figure 3 As shown, this embodiment provides a plug-in terminal structure including a control board 2, an auxiliary contact connection board 3, a first pin 4 and a second pin 5. The control board 2 is vertically arranged, and a first pad 21 is provided at its upper end; the first end of the auxiliary contact connection board 3 is electrically connected to the auxiliary contact 16, and its second end extends above the control board 2 and is provided with a second pad 31 and a via 32, and the via 32 is insulated from the auxiliary contact connection board 3. The first pin 4 passes through the via 32 and is welded to the first pad 21, and the second pin 5 is welded to the second pad 31.

[0036] The first pad 21 is used for the electrical connection between the first pin 4 and the control board 2. The second pad 31 is used for the electrical connection between the second pin 5 and the auxiliary contact connection board 3. A via hole 32 is provided on the auxiliary contact connection board 3 for the first pin 4 to turn and weld with the first pad 21, so that there is only a penetrating relationship between the first pin 4 and the auxiliary contact connection board 3, and there is no electrical connection relationship. The end of the auxiliary contact connection board 3 extends above the control board 2, replacing the conventional connection bent pin base 15, reducing the number of components of the plug-in terminal and the production cost.

[0037] In this embodiment, the via hole 32 is plated with metal, and at least part of the insertion section of the first pin 4 in the via hole 32 is welded to the via hole 32. By welding the insertion section of the first pin 4 in the via hole 32 with the via hole 32 through metal, the connection stability between the first pin 4 and the auxiliary contact connection board 3 and the control board 2 is improved, and the anti-plugging and unplugging ability of the plug-in terminal is enhanced.

[0038] Furthermore, a third pad 22 is also provided at the upper end of the control board 2, and the third pad 22 is insulated from the control board 2. The second pad 31 is a plug-in hole, and the second pin 5 has an extension section that extends out of the plug-in hole and extends to the third pad 22 to be welded to the third pad 22. The second pin 5 is welded to the second pad 31 through the extension section to achieve the mechanical connection between the second pin 5 and the control board 2, forming a multi-point connection limit structure on the second pin 5, improving the connection stability between the second pin 5 and the auxiliary contact connection board 3 and the control board 2, and further enhancing the anti-plugging and unplugging ability of the plug-in terminal.

[0039] Please refer to Figure 3 As shown, in this embodiment, the first pad 21 and the third pad 22 are arranged in a horizontal straight line, so that the vertical heights of the first pin 4 and the second pin 5 below the auxiliary contact connection board 3 are the same, reducing the dimensional difference between the first pin 4 and the second pin 5, making the sizes of the first pin 4 and the second pin 5 the same, which is convenient for production. Furthermore, the first pin 4 and the second pin 5 are in an L shape, and are respectively divided into long pins 41 and short pins 42 according to the lengths of the corner sections of the L shape. The specifications of each long pin 41 are the same, and the specifications of each short pin 42 are the same. This makes there be only two sizes for the first pin 4 and the second pin 5, reducing the production difficulty. At the same time, during assembly, only the positions between the long pins 41 and the short pins 42 need to be correspondingly distinguished, effectively reducing the assembly difficulty and improving the production and assembly efficiency.

[0040] In this embodiment, a supporting groove 23 is provided at the top edge of the control board 2 to support the second end of the auxiliary contact connection board 3. The supporting groove 23 accommodates and supports the second end of the auxiliary contact connection board 3, and at the same time limits the end of the auxiliary contact connection board 3 to prevent the end of the auxiliary contact connection board 3 from deflecting in the horizontal direction. Further, a positioning notch 33 adapted to the width of the supporting groove 23 is provided at the second end of the auxiliary contact connection board 3 to achieve its positioning on the supporting groove 23. The positioning notch 33 extends to both sides of the supporting groove to form a clamping and limiting structure, improving the accuracy of the installation position of the auxiliary contact connection board 3 and further limiting the auxiliary contact connection board 3 in the horizontal direction to improve the stability of the auxiliary contact connection board 3.

[0041] In this embodiment, the first end of the auxiliary contact connection board 3 is smaller than its second end, reducing the material used for the auxiliary contact connection board 3, reducing the weight of the plug-in terminal, and at the same time reducing the production cost. The first pads 21 are provided in two corresponding to the auxiliary contacts 16. The first circuit 34 electrically connecting one of the auxiliary contacts 16 is drawn along the upper side of the auxiliary contact connection board 3 to one of the first pads 21, and the second circuit (not shown in the drawing) electrically connecting the other of the auxiliary contacts 16 is drawn along the lower side of the auxiliary contact connection board 3 to the other of the first pads 21. The first limiting circuit and the second circuit are respectively distributed on the upper and lower sides of the auxiliary contact connection board 3, making full use of the surface space of the auxiliary contact connection board 3 and further reducing the width dimension of the auxiliary contact connection board 3 at the first end.

[0042] Further, an avoidance groove 24 corresponding to the second circuit is provided at the top of the control board 2. The avoidance groove 24 provides a space for the second circuit, ensuring that the bottom surface of the auxiliary contact connection board 3 can stably fit on the bottom of the supporting groove 23, so that there is a large fitting area between the auxiliary contact connection board 3 and the control board 2, improving the stability of the auxiliary contact connection board 3.

[0043] This embodiment also discloses a high-voltage DC relay, including a plug-in terminal structure, where the plug-in terminal structure is the above-mentioned plug-in terminal structure.

[0044] As mentioned above, the above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A plug-in terminal structure, comprising a control board, an auxiliary contact connection board, a first pin and a second pin, characterized in that: The control board is arranged vertically, and a first pad is provided at its upper end; the first end of the auxiliary contact connecting plate is electrically connected to the auxiliary contact, and its second end extends above the control board and is provided with a second pad and a via hole, and the via hole is insulated from the auxiliary contact connecting plate; the first pin passes through the via hole and is welded to the first pad, and the second pin is welded to the second pad.

2. The plug-in terminal structure according to claim 1, wherein: The via hole is plated with metal, and at least a part of the insertion section of the first pin in the via hole is welded to the via hole.

3. The plug-in terminal structure according to claim 1, characterized in that: A third pad is further provided at the upper end of the control board, and the third pad is insulated from the control board; the second pad is a plug hole, and the second pin has an extended section that extends out of the plug hole and is welded to the third pad.

4. The plug-in terminal structure according to claim 3, characterized in that: The first pad and the third pad are arranged in a horizontal straight line.

5. The plug-in terminal structure according to claim 3, wherein: The first pin and the second pin are in an L shape, and are each divided into a long pin and a short pin according to the length of the corner section of the L shape, and the specifications of each long pin are the same, and the specifications of each short pin are the same.

6. The plug-in terminal structure according to claim 1, wherein: A supporting groove is provided at the top edge of the control board to support the second end of the auxiliary contact connecting plate.

7. The plug-in terminal structure according to claim 6, wherein: A positioning notch adapted to the width of the supporting groove is provided at the second end of the auxiliary contact connecting plate to realize its positioning on the supporting groove.

8. The plug-in terminal structure according to claim 1, wherein: The first end of the auxiliary contact connecting plate is smaller than its second end, two first pads are provided corresponding to the auxiliary contact, and a first circuit electrically connecting one of the auxiliary contacts is drawn along the upper side of the auxiliary contact connecting plate to one of the first pads, and a second circuit electrically connecting the other of the auxiliary contacts is drawn along the lower side of the auxiliary contact connecting plate to the other of the first pads.

9. The plug-in terminal structure according to claim 8, wherein: An avoidance groove corresponding to the second circuit is provided at the top of the control board.

10. A high-voltage DC relay includes a plug-in terminal structure, characterized in that: The plug-in terminal structure is the plug-in terminal structure according to any one of claims 1-9.

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