Contactor base structure

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a contactor base structure, which comprises a supporting seat, a wiring unit, at least two coil units, a circuit board and a first cable, and is characterized in that the at least two coil units are arranged on the supporting seat at intervals along a first direction; the at least two circuit boards are arranged on the supporting seat at intervals in the first direction, each circuit board is electrically connected with at least one coil unit, at least part of the circuit board is electrically connected with a wiring unit, and the circuit board is provided with a first plug-in terminal; a first cable is arranged between every two adjacent circuit boards, second plug terminals are arranged at the two ends of each first cable respectively, and the second plug terminals are connected with the corresponding first plug terminals in a plug-in mode so that all the coil units can be connected in series, and the wiring units can be electrically connected with all the coil units. According to the contactor base structure provided by the utility model, the wiring efficiency is effectively improved, and the risk of wrong wiring is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a contactor base structure. Background Art

[0002] The contactor is one of the low-voltage components that controls the motor. Its main function is to frequently connect and disconnect the motor circuit or the power transmission and distribution circuit over a long distance.

[0003] At present, a known contactor includes two coil units connected in series, each coil unit corresponds to a wiring unit for an external power line, and the two coil units and the coil unit and the wiring unit are welded together through multiple wires. The wiring efficiency is low and the wiring is messy, and there is a risk of wrong wiring. Utility Model Content

[0004] The utility model aims to provide a contactor base structure, which is convenient for wiring, effectively improves wiring efficiency and reduces the risk of contact lines.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A contactor base structure is provided, comprising:

[0007] Support seat;

[0008] A wiring unit, the wiring unit being electrically connected to an external power line;

[0009] At least two coil units are arranged on the support base at intervals along a first direction;

[0010] At least two circuit boards are arranged on the support base at intervals along a first direction, each of the circuit boards is electrically connected to at least one of the coil units, at least some of the circuit boards are electrically connected to the wiring unit, and the circuit boards are provided with first plug-in terminals;

[0011] A first cable is provided between two adjacent circuit boards, and second plug-in terminals are respectively provided at both ends of the first cable. The second plug-in terminals are plugged into the corresponding first plug-in terminals to realize the series connection between all the coil units and the electrical connection between the wiring unit and all the coil units.

[0012] Optionally, two surge elements are further included, and the surge elements are arranged on the circuit board in a one-to-one correspondence, and the surge elements are connected in parallel with the coil units on the corresponding side through the copper-clad wires in the circuit board.

[0013] Optionally, two side covers are further included, and the two side covers are respectively arranged on two opposite sides of the support base along the first direction, and the side cover is provided with a receiving groove, and the circuit board on the corresponding side is arranged in the receiving groove.

[0014] Optionally, the wiring unit is fixedly arranged on the corresponding circuit board, and a wiring groove is arranged on the side cover, and the wiring unit is arranged in the wiring groove.

[0015] Optionally, it further includes a wire trough assembly disposed on the support seat, the wire trough assembly is provided with a wiring channel extending along a first direction, and the first cable passes through the wiring channel.

[0016] Optionally, the support base includes two side plates spaced apart along the second direction, the coil unit is located between the two side plates, and the circuit board and the wire slot assembly are arranged on the outer side of one of the two side plates.

[0017] Optionally, it also includes at least two second cables corresponding one to one with the coil units, the first end of the second cable is provided with a third plug-in terminal, the coil unit is provided with a fourth plug-in terminal, the third plug-in terminal is plugged into the corresponding fourth plug-in terminal, and the second end of the second cable is electrically connected to the corresponding circuit board.

[0018] Optionally, a fifth plug-in terminal is provided at the second end of the second cable, a sixth plug-in terminal is provided on the circuit board, and the fifth plug-in terminal is plugged into a corresponding sixth plug-in terminal.

[0019] Optionally, the wiring units are provided with two and are respectively provided on two opposite sides of the support base along the first direction, the coil units are provided with two and are respectively provided on two opposite sides of the support base along the first direction, and the circuit boards are provided with two and are respectively provided on two opposite sides of the support base along the first direction; wherein,

[0020] The circuit board is electrically connected to the coil unit on the corresponding side and the wiring unit on the corresponding side, and the second plug-in terminal is plugged into the first plug-in terminal one by one to achieve series connection between the two coil units and electrical connection between the wiring unit and the coil unit on different sides.

[0021] Optionally, the wiring unit includes a first wiring terminal and a second wiring terminal, the coil unit includes a coil body, the first plug-in terminal includes a first interface, a second interface and a third interface, and the second plug-in terminal includes a first plug-in portion, a second plug-in portion and a third plug-in portion; wherein,

[0022] The first interface is electrically connected to the first end of the coil body on the corresponding side through the copper-clad wire in the circuit board;

[0023] The first connection terminal is electrically connected to the second interface on the corresponding side through the copper-clad wire in the circuit board, and the second interface is electrically connected to the second end of the coil body on the corresponding side through the copper-clad wire in the circuit board;

[0024] The second connection terminal is electrically connected to the third interface on the corresponding side through the copper-clad wire in the circuit board;

[0025] The first plug-in portion is electrically connected to the first interface on the corresponding side; one of the two second plug-in portions is electrically connected to the second interface on the corresponding side, and the other is electrically connected to the third interface on the corresponding side; one of the two third plug-in portions is electrically connected to the remaining second interface, and the other is electrically connected to the remaining third interface.

[0026] Beneficial effects:

[0027] The contactor base structure provided by the utility model realizes the series connection between all coil units and the electrical connection between the wiring unit and all coil units by plugging the second plug-in terminals at both ends of the first cable with the first plug-in terminals of the circuit board on the corresponding side, thereby facilitating wiring, effectively improving wiring efficiency, and reducing the risk of wrong wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the contactor base structure provided by the utility model;

[0029] Figure 2 It is a partial structural schematic diagram of the contactor base structure provided by the utility model;

[0030] Figure 3 It is a wiring diagram of the contactor base structure provided by the utility model;

[0031] Figure 4 It is a structural schematic diagram of the side cover provided by the utility model;

[0032] Figure 5 It is a schematic structural diagram of one side of the circuit board provided by the utility model facing the bottom of the accommodating groove.

[0033] In the figure:

[0034] 100, support seat; 110, side plate; 120, support plate;

[0035] 200, wiring unit; 210, first wiring terminal; 211, support member; 212, pressing plate; 213, fastener; 220, second wiring terminal;

[0036] 300, coil unit;

[0037] 400, circuit board; 410, first plug-in terminal; 411, first interface; 412, second interface; 413, third interface;

[0038] 500, first cable; 510, first cable core; 520, second cable core; 530, third cable core;

[0039] 600, surge components;

[0040] 700, side cover; 701, receiving groove; 702, wiring groove; 710, first step portion; 711, first through hole; 712, second through hole; 720, second step portion;

[0041] 800, wire trough assembly; 801, wiring channel; 810, first wire frame component; 820, second wire frame component. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] Reference Figures 1 to 3 As shown, this embodiment provides a contactor base structure, which includes a support base 100 , a wiring unit 200 , a coil unit 300 , a circuit board 400 and a first cable 500 .

[0047] Specifically, at least two coil units 300 are provided, and at least two coil units 300 are arranged on the support base 100 at intervals along the first direction; at least two circuit boards 400 are provided, and at least two circuit boards 400 are arranged on the support base 100 at intervals along the first direction, each circuit board 400 is electrically connected to at least one coil unit 300, at least some of the circuit boards 400 are electrically connected to the wiring unit 200, and the circuit board 400 is provided with a first plug-in terminal 410; a first cable 500 is provided between two adjacent circuit boards 400, and second plug-in terminals are respectively provided at both ends of the first cable 500, and the second plug-in terminals are plugged into the corresponding first plug-in terminals 410 to realize the series connection between all the coil units 300 and the electrical connection between the wiring unit 200 and all the coil units 300. Among them, the wiring unit 200 can be electrically connected to an external power line (not shown). Among them, Figure 1 The a direction in the figure is the first direction, and the first direction may be the length direction of the support base 100 .

[0048] In this embodiment, the second plug-in terminals at both ends of the first cable 500 are plugged into the first plug-in terminals 410 of the circuit board 400 on the corresponding side to realize the series connection between all the coil units 300 and the electrical connection between the wiring unit 200 and all the coil units 300, which facilitates wiring, effectively improves wiring efficiency, and reduces the risk of wrong wiring. In addition, the external power line can be electrically connected to the wiring unit 200 at an appropriate position to improve applicability.

[0049] In some embodiments, when at least three circuit boards 400 are provided, that is, at least two first cables 500 are provided, along the first direction, the outermost circuit board 400 is provided with a first plug-in terminal 410, and the remaining circuit boards 400 are provided with two first plug-in terminals 410 to facilitate wiring, wherein a first plug-in terminal 410 is provided on both sides of the remaining circuit boards 400. In other embodiments, when at least three circuit boards 400 are provided, the adjacent ends of two adjacent first cables 500 are connected together through the second plug-in terminal. It can be understood that one first plug-in terminal 410 is provided on the circuit board 400, and along the first direction, the number of interfaces of the first plug-in terminal 410 on the outermost circuit board 400 is half of the number of interfaces of the first plug-in terminals 410 on the remaining circuit boards 400, so as to be suitable for the plug-in between the first plug-in terminal 410 and the corresponding second plug-in terminal.

[0050] In this embodiment, refer to Figure 3 and Figure 4 As shown, the contactor base structure also includes two surge elements 600, which are arranged on the circuit board 400 in a one-to-one correspondence, and the surge element 600 is connected in parallel with the coil unit 300 on the corresponding side through the copper-clad wire in the circuit board 400. Among them, the coil unit 300 includes a coil body (not shown), and the surge element 600 and the coil unit 300 are connected in parallel. It can be understood that the first pin of the surge element 600 is electrically connected to the first end of the coil body, and the second pin of the surge element 600 is electrically connected to the second end of the coil body. In this embodiment, the surge element 600 is integrated on the circuit board 400, and the parallel connection with the coil unit 300 can be achieved without wires, which is convenient for assembly and further reduces the risk of wrong wiring.

[0051] In this embodiment, the contactor base structure further includes at least two second cables (not shown) corresponding to the coil units 300 one by one, and the coil units 300 are electrically connected to the circuit board 400 through the second cables.

[0052] Exemplarily, the first end of the second cable may be provided with a third plug-in terminal (not shown), the coil unit 300 is provided with a fourth plug-in terminal (not shown), the third plug-in terminal is plugged with the corresponding fourth plug-in terminal, and the second end of the second cable is electrically connected to the corresponding circuit board 400, which is convenient for connection and effectively improves the assembly efficiency between the coil unit 300 and the circuit board 400. Specifically, the coil unit 300 is provided with two fourth plug-in terminals corresponding to the two ends of the coil body, and the first end of the corresponding second cable is provided with two third plug-in terminals, and the third plug-in terminal is plugged with the fourth plug-in terminal in a one-to-one correspondence.

[0053] Exemplarily, the second end of the second cable may be provided with a fifth plug-in terminal (not shown), and the circuit board 400 may be provided with a sixth plug-in terminal (not shown). The fifth plug-in terminal is plugged into the corresponding sixth plug-in terminal for convenient connection, thereby effectively improving the assembly efficiency between the coil unit 300 and the circuit board 400.

[0054] In this embodiment, refer to Figure 2 , Figure 4 and Figure 5 As shown, the contactor base structure also includes two side covers 700, which are respectively arranged on two opposite sides of the support base 100 along the first direction, and the side covers 700 are provided with a receiving groove 701, and the circuit board 400 on the corresponding side is arranged in the receiving groove 701. In this embodiment, the side cover 700 is arranged to facilitate the fixing of the circuit board 400, and the side cover 700 can also protect the circuit board 400. Among them, the wiring unit 200 and the surge element 600 are located on the side of the circuit board 400 facing the bottom of the receiving groove 701.

[0055] Exemplarily, the wiring unit 200 is fixedly disposed on the corresponding circuit board 400 to facilitate the connection between the wiring unit 200 and the circuit board 400, thereby effectively reducing the risk of wrong wiring.

[0056] Exemplarily, a wiring groove 702 may also be provided on the side cover 700, and a wiring unit 200 is provided in the wiring groove 702. The wiring unit 200 is limited by the wiring groove 702, which effectively prevents the wiring unit 200 from exerting excessive force on the circuit board 400 during wiring and destroying the connection between the wiring unit 200 and the circuit board 400.

[0057] Specifically, the wiring unit 200 includes a first wiring terminal 210 and a second wiring terminal 220, and two wiring slots 702 are provided. One of the two wiring slots 702 accommodates the first wiring terminal 210, and the other accommodates the second wiring terminal 220. The first wiring terminal 210 and the second wiring terminal 220 are separated by the two wiring slots 702, effectively preventing a phase-to-phase short circuit between the first wiring terminal 210 and the second wiring terminal 220.

[0058] Specifically, the wiring slot 702 is disposed on one side of the side cover 700 along the second direction, and two wiring slots 702 are staggered along the third direction to facilitate wiring. Figure 1 The b direction is the second direction, which may be the width direction of the support base 100, and the c direction is the third direction, which may be the height direction of the support base 100. Exemplarily, the side cover 700 is provided with the wiring slot 702 on one side in a stepped shape, including a first step portion 710 and a second step portion 720, one of the two wiring slots 702 is located at the first step portion 710, and the other is located at the second step portion 720, so as to facilitate wiring.

[0059] Specifically, the first terminal 210 includes a support member 211, a pressure plate 212 and a fastener 213, wherein the support member 211 is fixed on the circuit board 400, the fastener 213 passes through the pressure plate 212 and is threadedly connected to the support member 211, and the support member 211 and the pressure plate 212 are used to clamp and fix the external power line. In this embodiment, the first terminal 210 is located in the wiring groove 702 of the first step portion 710, wherein the top surface of the first step portion 710 is provided with a first through hole 711 connected to the corresponding wiring groove 702, and the side surface of the first step portion 710 is provided with a second through hole 712 connected to the corresponding wiring groove 702, the external power source passes through the second through hole 712 to between the pressure plate 212 and the support member 211, and the fastener 213 is screwed through the first through hole 711 by a fastening tool, so as to facilitate the disassembly and assembly of the external power line. Among them, the structure of the second terminal 220 is the same as that of the first terminal 210, and the structure of the second step portion 720 at the corresponding wiring slot 702 is the same as that of the first step portion 710 at the corresponding wiring slot 702, which will not be described in detail in this application.

[0060] By way of example, the fastener 213 may be a bolt.

[0061] In this embodiment, refer to Figure 1 As shown, the contactor base structure also includes a wire trough assembly 800 arranged on the support base 100. The wire trough assembly 800 is provided with a wiring channel 801 extending along a first direction. The first cable 500 passes through the wiring channel 801 to protect the first cable 500 and prevent the first cable 500 from being entangled with other components.

[0062] Specifically, the support base 100 includes two side plates 110 spaced apart along the second direction, the coil unit 300 is located between the two side plates 110, and the circuit board 400 and the wire slot assembly 800 are arranged on the outer side of one of the two side plates 110, that is, the accommodating slot 701 and the wiring slot 702 are both located on the outer side of the side plate 110, and the structure is simple and easy to assemble. Among them, the side plate 110 is extended along the first direction, and the side cover 700 and the coil unit 300 are located at the corresponding ends of the side plate 110 along the first direction. Further, the support base 100 also includes a plurality of support plates 120 spaced apart along the first direction, for example, two support plates 120, the support plates 120 are extended along the second direction, and the side plates 110 are fixed on the support plates 120.

[0063] Specifically, the wire trough assembly 800 includes a first wire frame member 810 and a second wire frame member 820 , which enclose a wiring channel 801 . The first wire frame member 810 is fixed to the corresponding side panel 110 , and the second wire frame cover is disposed on the second wire frame member 820 .

[0064] In this embodiment, refer to Figure 1 and Figure 3 As shown, two circuit boards 400 are provided and are respectively arranged on two opposite sides of the support base 100 along the first direction. At least one of the two circuit boards 400 is electrically connected to the wiring unit 200, and one of the two circuit boards 400 is electrically connected to part of the coil units 300, and the other is electrically connected to the remaining coil units 300, which facilitates wiring, effectively improves wiring efficiency, and reduces the risk of wrong wiring.

[0065] In a feasible embodiment, two wiring units 200 are provided and are respectively arranged on two sides of the support base 100 opposite to each other along the first direction, and two coil units 300 are provided and are respectively arranged on two sides of the support base 100 opposite to each other along the first direction; wherein, the circuit board 400 is electrically connected to the coil unit 300 on the corresponding side and the wiring unit 200 on the corresponding side, and the second plug-in terminal is plugged into the first plug-in terminal 410 one by one to realize the series connection between the two coil units 300 and the electrical connection between the wiring unit 200 and the coil unit 300 on different sides, which is convenient for wiring, effectively improves wiring efficiency, and reduces the risk of wrong wiring. In addition, each wiring unit 200 is electrically connected to two coil units 300, and the external power line can be selected to be electrically connected to one of the two wiring units 200 to improve applicability.

[0066] In this embodiment, refer to Figure 3As shown, the wiring unit 200 includes a first wiring terminal 210 and a second wiring terminal 220, the first plug-in terminal 410 includes a first interface 411, a second interface 412 and a third interface 413, and the second plug-in terminal includes a first plug-in portion, a second plug-in portion and a third plug-in portion, that is, the first cable 500 includes a first cable core 510, a second cable core 520 and a third cable core 530, the first plug-in portion is connected to the first cable core 510, the second plug-in portion is connected to the second cable core 520, and the third plug-in portion is connected to the third cable core 530. Among them, the first interface 411 is electrically connected to the first end of the coil body on the corresponding side through the copper-clad wire in the circuit board 400; the first terminal 210 is electrically connected to the second interface 412 on the corresponding side through the copper-clad wire in the circuit board 400, and the second interface 412 is electrically connected to the second end of the coil body on the corresponding side through the copper-clad wire in the circuit board 400; the second terminal 220 is electrically connected to the third interface 413 on the corresponding side through the copper-clad wire in the circuit board 400; the first plug-in portion is electrically connected to the first interface 411 on the corresponding side; one of the two second plug-in portions is electrically connected to the second interface 412 on the corresponding side, and the other is electrically connected to the third interface 413 on the corresponding side; one of the two third plug-in portions is electrically connected to the remaining second interface 412, and the other is electrically connected to the remaining third interface 413. In this embodiment, through the use of the circuit board 400 and the first cable 500, one of the two wiring units 200 can be selected to be electrically connected to the external power line, which improves applicability and effectively reduces the risk of connecting the wrong line.

[0067] It is understandable that for connection methods not explicitly described in the text, common connection methods such as threaded connection, welding or bonding can be selected according to needs.

[0068] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A contactor base structure, characterized in that: include: Support seat (100); A wiring unit (200), wherein the wiring unit (200) can be electrically connected to an external power line; At least two coil units (300) are arranged on the support seat (100) at intervals along a first direction; At least two circuit boards (400) are arranged on the support seat (100) at intervals along a first direction, each circuit board (400) is electrically connected to at least one coil unit (300), at least some of the circuit boards (400) are electrically connected to the wiring unit (200), and the circuit boards (400) are provided with first plug-in terminals (410); A first cable (500) is provided between two adjacent circuit boards (400), and second plug-in terminals are provided at both ends of the first cable (500), and the second plug-in terminals are plugged into the corresponding first plug-in terminals (410) to achieve series connection between all the coil units (300) and electrical connection between the wiring unit (200) and all the coil units (300).

2. The contactor base structure according to claim 1, characterized in that: It also includes two surge elements (600), which are arranged on the circuit board (400) in a one-to-one correspondence, and the surge elements (600) are connected in parallel with the coil units (300) on the corresponding side through the copper-clad wires in the circuit board (400).

3. The contactor base structure according to claim 1, characterized in that: It also includes two side covers (700), which are respectively arranged on two opposite sides of the support base (100) along the first direction, and the side cover (700) is provided with a receiving groove (701), and the circuit board (400) on the corresponding side is arranged in the receiving groove (701).

4. The contactor base structure according to claim 3, characterized in that: The wiring unit (200) is fixedly arranged on the corresponding circuit board (400), and a wiring groove (702) is arranged on the side cover (700), and the wiring unit (200) is arranged in the wiring groove (702).

5. The contactor base structure according to claim 1, characterized in that: It also includes a wire trough assembly (800) arranged on the support seat (100), the wire trough assembly (800) being provided with a wiring channel (801) extending along a first direction, and the first cable (500) passing through the wiring channel (801).

6. The contactor base structure according to claim 5, characterized in that: The support base (100) comprises two side plates (110) arranged at intervals along a second direction, the coil unit (300) is located between the two side plates (110), and the circuit board (400) and the wire slot assembly (800) are arranged on the outer side of one of the two side plates (110).

7. The contactor base structure according to claim 1, characterized in that: It also includes at least two second cables corresponding one to the coil units (300), the first ends of the second cables being provided with third plug-in terminals, the coil units (300) being provided with fourth plug-in terminals, the third plug-in terminals being plugged into the corresponding fourth plug-in terminals, and the second ends of the second cables being electrically connected to the corresponding circuit boards (400).

8. The contactor base structure according to claim 7, characterized in that: The second end of the second cable is provided with a fifth plug-in terminal, the circuit board (400) is provided with a sixth plug-in terminal, and the fifth plug-in terminal is plugged into the corresponding sixth plug-in terminal.

9. The contactor base structure according to claim 1, characterized in that: The wiring units (200) are provided in two pieces and are respectively provided on two opposite sides of the support base (100) along the first direction; the coil units (300) are provided in two pieces and are respectively provided on two opposite sides of the support base (100) along the first direction; and the circuit boards (400) are provided in two pieces and are respectively provided on two opposite sides of the support base (100) along the first direction; wherein, The circuit board (400) is electrically connected to the coil unit (300) on the corresponding side and the wiring unit (200) on the corresponding side, and the second plug-in terminal is plugged into the first plug-in terminal (410) in a one-to-one correspondence to achieve series connection between the two coil units (300) and electrical connection between the wiring unit (200) and the coil unit (300) on different sides.

10. The contactor base structure according to claim 9, characterized in that: The wiring unit (200) comprises a first wiring terminal (210) and a second wiring terminal (220); the coil unit (300) comprises a coil body; the first plug-in terminal (410) comprises a first interface (411), a second interface (412) and a third interface (413); the second plug-in terminal comprises a first plug-in portion, a second plug-in portion and a third plug-in portion; wherein: The first interface (411) is electrically connected to the first end of the coil body on the corresponding side through a copper-clad wire in the circuit board (400); The first connection terminal (210) is electrically connected to the second interface (412) on the corresponding side through the copper-clad wire in the circuit board (400), and the second interface (412) is electrically connected to the second end of the coil body on the corresponding side through the copper-clad wire in the circuit board (400); The second connection terminal (220) is electrically connected to the third interface (413) on the corresponding side via a copper-clad wire in the circuit board (400); The first plug-in portion is electrically connected to the first interface (411) on the corresponding side; one of the two second plug-in portions is electrically connected to the second interface (412) on the corresponding side, and the other is electrically connected to the third interface (413) on the corresponding side; one of the two third plug-in portions is electrically connected to the remaining second interface (412), and the other is electrically connected to the remaining third interface (413).

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