Plug terminal structure and high-voltage direct-current relay

Abstract

The utility model relates to the technical field of relays, in particular to a plug terminal structure and a high-voltage direct-current relay, comprising a control panel, an auxiliary contact connecting plate, a first pin and a second pin, the control panel is vertically arranged, and the upper end of the control panel is provided with a first pad; 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

A plug-in terminal structure and a high-voltage DC relay Technical Field

[0001] This utility model relates to the field of high-voltage DC relay technology, specifically to a plug-in terminal structure and a high-voltage DC relay. Background Technology

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

[0003] When no excitation voltage is applied to the electromagnetic drive section of the high-voltage DC relay, no current flows through the coil, and the corresponding electromagnetic drive section does not generate magnetic flux. The armature in the rotating mechanism is in its initial state under the reaction force of the spring. The electrodes in the high-voltage chamber are connected to each other through contact plates to form a circuit. When an excitation voltage is applied to the electromagnetic drive section, current flows through the coil, and the electromagnetic drive section generates magnetic flux. The armature in the rotating mechanism overcomes the reaction force of the spring and is attracted. At this time, the contact plate rotates accordingly, separating from electrode NC and turning towards electrode NO, and finally connecting with electrode NO.

[0004] As shown in Figure 1, the existing high-voltage DC relay's connector terminals have a first circuit board 11 and a second circuit board 12 on the top and side surfaces of the ceramic 1, respectively. The first circuit board 11 and the second circuit board 12 each have two sets of first bent pins 13 and second bent pins 14. A connecting pin seat 15 is provided on the second circuit board 12. The first bent pin 13 passes through the second circuit board 12 and is mounted on the connecting pin seat 15, while the second bent pin 14 passes through the connecting pin seat 15, thus fixing the first bent pin 13 and the second bent pin 14. Furthermore, due to the terminal position requirements of the connection port, the first bent pins 13 and the second bent pins 14 in the same group are diagonally distributed, resulting in four different structures for each pin. During production, four types of bent pins need to be manufactured, and specific bent pins need to be installed in specific positions, leading to poor production and assembly efficiency. Additionally, the connecting pin seat 15 results in a large overall weight of the connection terminal, requiring a large amount of material and increasing production costs. Summary of the Invention

[0005] The purpose of this utility model is to provide a plug-in terminal structure and a high-voltage DC relay, aiming to improve the problems of complex existing plug-in terminal structures and a variety of bent pins.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[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 vertically arranged and has a first pad at its upper end. A first end of the auxiliary contact connection board is electrically connected to an auxiliary contact, and a second end extends above the control board and has a second pad and a via. The via is insulated from the auxiliary contact connection board. The first pin passes through the via and is soldered to the first pad, and the second pin is soldered to the second pad.

[0008] Furthermore, the via is metal-plated, and at least a portion of the insertion section of the first pin in the via is welded to the via.

[0009] Furthermore, the upper end of the control board is provided with a third pad, which is insulated from the control board; the second pad is a plug-in hole, and the second pin has an extension section that extends from the plug-in hole to the third pad and is soldered to the third pad.

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

[0011] Furthermore, the first pin and the second pin are L-shaped, and each is divided into a long pin and a short pin according to the length of the corner segment of the L-shape. The specifications of each long pin are the same, and the specifications of each short pin are the same.

[0012] Furthermore, the top edge of the control board is provided with a support groove to support the second end of the auxiliary contact connection plate.

[0013] Furthermore, the second end of the auxiliary contact connecting plate is provided with a positioning notch adapted to the width of the support groove, so as to achieve its positioning on the support groove.

[0014] Furthermore, the first end of the auxiliary contact connecting plate is smaller than its second end, and the first pad is configured as two corresponding to the auxiliary contact. A first line electrically connected to one of the auxiliary contacts is pulled along the upper side of the auxiliary contact connecting plate to one of the first pads, and a second line electrically connected to the other auxiliary contact is pulled along the lower side of the auxiliary contact connecting plate to the other first pad.

[0015] Furthermore, the top of the control board is provided with a clearance groove corresponding to the second line.

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

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

[0018] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0019] 1. The first pad is used for electrical connection between the first pin and the control board, and the second pad is used for electrical connection between the second pin and the auxiliary contact connection board. The auxiliary contact connection board is provided with a through hole for the first pin to rotate and solder to the first pad, so that the first pin and the auxiliary contact connection board only have a through-hole relationship and no electrical connection relationship. The end of the auxiliary contact connection board extends to the top of the control board, replacing the conventional connecting bent pin seat, reducing the number of components of the plug terminal and reducing production costs.

[0020] 2. The first and third pads are arranged in a horizontal straight line, ensuring that the first and second pins are at the same vertical height below the auxiliary contact connection plate. This reduces the dimensional difference between the first and second pins, making them identical in size and facilitating production. Furthermore, both the first and second pins are L-shaped, with each divided into long and short pins based on the length of the L-shaped corner segment. All long pins and short pins have the same specifications. This results in only two sizes for the first and second pins, reducing production difficulty. During assembly, only the positions of the long and short pins need to be differentiated, effectively reducing assembly difficulty and improving production efficiency. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the prior art structure of the plug-in terminal structure of this utility model;

[0022] Figure 2 is a first structural schematic diagram of the plug-in terminal structure of the present invention;

[0023] Figure 3 is a schematic diagram of the second structure of the plug-in terminal structure of this utility model.

[0024] Explanation of reference numerals in the attached figures:

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

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

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

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

[0029] 5. Second pin. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 this utility model and are not intended to limit this utility model.

[0031] Additionally, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are all based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element of this utility model must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] When an element is referred to as being "fixed to," "set on," or "contained on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to," it can be directly connected to or indirectly connected to that other element.

[0033] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Example

[0035] Referring to Figures 2 and 3, 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, with a first solder pad 21 at its upper end. The first end of the auxiliary contact connection board 3 is electrically connected to an auxiliary contact 16, and its second end extends above the control board 2 and has a second solder pad 31 and a via 32. The via 32 is insulated from the auxiliary contact connection board 3. The first pin 4 passes through the via 32 and is soldered to the first solder pad 21, and the second pin 5 is soldered to the second solder pad 31.

[0036] The first pad 21 is used for the electrical connection between the first pin 4 and the control board 2, and the second pad 31 is used for the electrical connection between the second pin 5 and the auxiliary contact connection plate 3. The auxiliary contact connection plate 3 is provided with a through hole 32 for the first pin 4 to rotate and solder to the first pad 21, so that the first pin 4 and the auxiliary contact connection plate 3 only have a through-hole relationship and no electrical connection relationship. The end of the auxiliary contact connection plate 3 extends to the top of the control board 2, replacing the conventional connecting bent pin seat 15, reducing the number of components of the plug terminal and reducing production costs.

[0037] In this embodiment, the via 32 is plated with metal, and at least a portion of the insertion section of the first pin 4 in the via 32 is welded to the via 32. By welding the insertion section of the first pin 4 in the via 32 to the via 32 with metal, the connection stability between the first pin 4 and the auxiliary contact connection plate 3 and the control plate 2 is improved, and the anti-plugging and plugging capability of the plug terminal is improved.

[0038] Furthermore, the upper end of the control board 2 is provided with a third pad 22, which 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 from the plug-in hole to the third pad 22 and is soldered to it. The second pin 5 is soldered to the second pad 31 through the extension section, realizing the mechanical connection between the second pin 5 and the control board 2. A multi-point connection limiting structure is formed on the second pin 5, which improves the connection stability between the second pin 5 and the auxiliary contact connection plate 3 and the control board 2, and further improves the anti-plugging and unplugging capability of the plug-in terminal.

[0039] Referring to Figure 3, in this embodiment, the first pad 21 and the third pad 22 are arranged in a horizontal straight line, so that the first pin 4 and the second pin 5 are at the same vertical height below the auxiliary contact connecting plate 3. This reduces the dimensional difference between the first pin 4 and the second pin 5, making them the same size and facilitating production. Furthermore, the first pin 4 and the second pin 5 are L-shaped, each divided into a long pin 41 and a short pin 42 based on the length of the L-shaped corner segment. All long pins 41 and short pins 42 have the same specifications. This ensures that the first pin 4 and the second pin 5 have only two sizes, reducing production difficulty. During assembly, only the positions of the long pins 41 and the short pins 42 need to be distinguished, effectively reducing assembly difficulty and improving production assembly efficiency.

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

[0041] In this embodiment, the first end of the auxiliary contact connecting plate 3 is smaller than its second end, reducing the material used in the auxiliary contact connecting plate 3, reducing the weight of the plug-in terminal, and simultaneously reducing production costs. Two first pads 21 are configured corresponding to the auxiliary contacts 16. A first line 34 electrically connecting one of the auxiliary contacts 16 is pulled along the upper side of the auxiliary contact connecting plate 3 to one of the first pads 21, and a second line (not shown in the accompanying drawings) electrically connecting the other auxiliary contact 16 is pulled along the lower side of the auxiliary contact connecting plate 3 to the other first pad 21. The first limiting line and the second line are respectively distributed on the upper and lower sides of the auxiliary contact connecting plate 3, fully utilizing the surface space of the auxiliary contact connecting plate 3 and further reducing the width dimension of the auxiliary contact connecting plate 3 at the first end.

[0042] Furthermore, the top of the control board 2 is provided with a clearance groove 24 corresponding to the second line. The clearance groove 24 makes way for the second line, ensuring that the bottom surface of the auxiliary contact connection plate 3 can stably fit against the bottom of the support groove 23, so that the auxiliary contact connection plate 3 and the control board 2 have a large contact area, thereby improving the stability of the auxiliary contact connection plate 3.

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

[0044] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the 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 its upper end is provided with a first solder pad; the first end of the auxiliary contact connecting plate is electrically connected to the auxiliary contact, and its second end extends to the top of the control board and is provided with a second solder pad and a via, the via being insulated from the auxiliary contact connecting plate; the first pin passes through the via and is soldered to the first solder pad, and the second pin is soldered to the second solder pad.

2. The plug-in terminal structure as described in claim 1, characterized in that: The via is plated with metal, and at least a portion of the insertion section of the first pin in the via is welded to the via.

3. The plug-in terminal structure as described in claim 1, characterized in that: The upper end of the control board is also provided with a third pad, which is insulated from the control board; the second pad is a plug-in hole, and the second pin has an extension section that extends from the plug-in hole to the third pad and is soldered to the third pad.

4. The plug-in terminal structure as described in 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 as described in claim 3, characterized in that: The first pin and the second pin are L-shaped, and are divided into long pins and short pins according to the length of the corner segment of the L-shape. All long pins have the same specifications, and all short pins have the same specifications.

6. The plug-in terminal structure as described in claim 1, characterized in that: The top edge of the control board is provided with a support groove to support the second end of the auxiliary contact connection plate.

7. The plug-in terminal structure as described in claim 6, characterized in that: The second end of the auxiliary contact connecting plate is provided with a positioning notch adapted to the width of the support groove, so as to achieve its positioning on the support groove.

8. The plug-in terminal structure as described in claim 1, characterized in that: The first end of the auxiliary contact connecting plate is smaller than its second end. The first pad is configured as two corresponding to the auxiliary contact. A first line electrically connected to one of the auxiliary contacts is pulled along the upper side of the auxiliary contact connecting plate to one of the first pads. A second line electrically connected to the other auxiliary contact is pulled along the lower side of the auxiliary contact connecting plate to the other first pad.

9. The plug-in terminal structure as described in claim 8, characterized in that: The top of the control board is provided with a clearance groove corresponding to the second line.

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

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