Polyphase electromagnetic relay

Abstract

The multi-phase electromagnetic relay includes a plurality of lead-out terminals of paths and a plurality of fixed and movable contact cooperation structures (61, 62, 63), the lead-out terminals of each path respectively include an incoming line terminal (21, 22, 23) and an outgoing line terminal (31, 32, 33), the fixed and movable contact cooperation structure is provided between the incoming line terminal and the outgoing line terminal of the same path, the plurality of incoming line terminals are provided on one side of the fixed and movable contact cooperation structure, and the plurality of outgoing line terminals are provided on the other side of the fixed and movable contact cooperation structure. the plurality of incoming terminals, the plurality of outgoing terminals, and the plurality of incoming terminals and the plurality of outgoing terminals are spaced apart from one another without crossing, the external connection ends (211, 221, 231) of the plurality of incoming terminals and the external connection ends (311, 321, 331) of the plurality of outgoing terminals all extend in the same direction, and the external connection ends of the incoming terminals and the external connection ends of the outgoing terminals of the same path are provided corresponding to both sides of the fixed and movable contact cooperation structure. This multiphase electromagnetic relay can avoid the crossing arrangement of the outgoing terminals, and can further solve the complicated problems of insulation and spot welding, and can reduce copper consumption, and can also save copper consumption of the movable and fixed spring members inside the relay, thereby reducing costs.

Description

Technical Field

[0001] [Cross - reference to Related Applications] This disclosure claims the priority of Chinese patent applications with application numbers 202110678844.1, 202110680502.3, and 202121367443.6 filed on June 18, 2021, and all the contents of the Chinese patent applications are incorporated herein by reference.

[0002] This disclosure relates to the field of power technology, and particularly to polyphase electromagnetic relays.

Background Art

[0003] Polyphase electromagnetic relays are mainly applied to power systems, and realize the on - or - off of the power supply to the load through two or more sets of contact parts composed of two or more sets of movable and fixed spring members. For example, a three - phase electromagnetic relay has three sets of contact parts composed of three sets of movable and fixed spring members, and can realize the control of the on - or - off of the three - phase electricity of the load. Such polyphase electromagnetic relays usually include a base and lead - out terminals of a plurality of paths drawn from the inside of the base to the outside. The lead - out terminals of each path include an incoming - line terminal and an outgoing - line terminal respectively. The incoming - line terminal and the outgoing - line terminal of the same path communicate with the same set of movable and fixed contact structures inside the base respectively. When the movable contact of the same set contacts the fixed contact, the incoming - line terminal and the outgoing - line terminal of the same path communicate, and when the movable contact and the fixed contact of the same set are separated, the incoming - line terminal and the outgoing - line terminal of the same path do not communicate.

[0004] In such a conventional multi-phase electromagnetic relay, the incoming and outgoing terminals of the same path are usually drawn out from the base close to each other, but due to the need for external wiring, for example the need for 1-input 8-output wiring in a three-phase electromagnetic relay, some incoming or outgoing terminals must be drawn out across the incoming or outgoing terminals of other paths, which results in some incoming and outgoing terminals being distributed in a crossed manner, and such a multi-phase electromagnetic relay with crossed and distributed outgoing terminals consumes a lot of copper (the outgoing terminals are made of copper material), is expensive, requires complex molding of copper members, requires complex assembly and spot welding techniques, and has problems such as a risk of safety distance between high voltages. In addition, in such a conventional multi-phase electromagnetic relay, the incoming and outgoing terminals of the same path adopt fixed spring seats and moving spring drawers, respectively, and the movable and fixed spring members inside the relay form a Z-bend structure, which also results in high copper consumption and high cost. Summary of the Invention

[0005] The objective of the present disclosure is to overcome the shortcomings of the prior art and provide a multi-phase electromagnetic relay, which, through structural improvements, can avoid the intertwined arrangement of copper members (i.e., lead-out terminals), further solve the complicated problems of insulation and spot welding, and reduce copper consumption, while saving copper consumption of the movable and fixed spring members inside the relay, thus reducing costs. One aspect of the present disclosure provides a polyphase electromagnetic relay, including a base, lead-out terminals of a plurality of paths drawn out from inside the base to the outside, and a plurality of fixed and movable contact cooperation structures mounted inside the base. Each lead-out terminal of each path includes an incoming line terminal and an outgoing line terminal, and a fixed and movable contact cooperation structure is provided between the incoming line terminal and the outgoing line terminal of the same path. The base is in the shape of a rectangular parallelepiped. Each incoming line terminal is drawn out from one of the four side walls of the base, i.e., the first side wall, to the outside, and each outgoing line terminal is drawn out from the second side wall of the base to the outside. The second side wall and the first side wall are provided opposite to each other. Each incoming line terminal and each outgoing line terminal are bent outside the third side wall of the base so as not to intersect and to be spaced apart outside the base. The external connection ends of each incoming line terminal and the external connection ends of each outgoing line terminal are arranged in a row parallel to the third side wall outside the third side wall. The incoming line terminal and the outgoing line terminal of the same path are located at corresponding positions on both sides of the same row. The third side wall is connected between the first side wall and the second side wall.

[0006] According to an embodiment of the present disclosure, the external connection end of the zero-line incoming line and the external connection end of the zero-line outgoing line are distributed between the external connection end of each incoming line terminal and the external connection end of each outgoing line terminal, and the external connection end of the zero-line incoming line and the external connection end of the zero-line outgoing line are connected by an electrical connection piece. According to an embodiment of the present disclosure, an external connection member is provided at each external connection end. The external connection member includes at least one annular terminal and a welding piece. The at least one annular terminal is movably provided at one end of the welding piece, and the other end of the welding piece is welded and fixed to one of the incoming line terminal, the outgoing line terminal, and the electrical connection piece. The annular terminal further has a bolt. According to an embodiment of the present disclosure, each of the incoming line terminals and each of the outgoing line terminals are both in a sheet-type structure. Each of the incoming line terminals and each of the outgoing line terminals includes a first portion that protrudes outside the base perpendicular to the side wall of the base from inside the base, and a second portion that is bent and connected to the first portion. The external connection end is located at the second portion.

[0007] According to an embodiment of the present disclosure, the first part and the second part are integrally connected at the bending location.

[0008] According to an embodiment of the present disclosure, the first part and the second part are two independent members, and the first part and the second part are fixed by welding at the bending location.

[0009] According to an embodiment of the present disclosure, the second part of each incoming line terminal includes a separator for collecting current signals.

[0010] According to an embodiment of the present disclosure, the fixed and movable contact cooperation structure includes a first fixed spring seat, a first fixed contact, a first movable spring seat, a first movable contact, a second fixed spring seat, a second fixed contact, a second movable spring seat, and a second movable contact. The first fixed contact is fixed to one end of the first fixed spring seat and one end of the first movable spring seat. The first movable contact is fixed to the other end of the first movable spring seat. The second fixed contact is fixed to one end of the second fixed spring seat and one end of the second movable spring seat. The second movable contact is fixed to the other end of the second movable spring seat. The first fixed contact cooperates with the second movable contact correspondingly. The second fixed contact cooperates with the first movable contact correspondingly. The first fixed spring seat is an incoming line terminal, and the second fixed spring seat is an outgoing line terminal.

[0011] According to an embodiment of the present disclosure, a plurality of slots are respectively provided on the first side wall and the second side wall of the base. Each first fixed spring seat is respectively inserted into the slot of the first side wall of the base. One end of the first fixed spring seat is closer to the first side wall than the second side wall. Each second fixed spring seat is respectively inserted into the slot of the second side wall of the base. One end of the second fixed spring seat is closer to the second side wall than the first side wall.

[0012] According to an embodiment of the present disclosure, the first movable spring seat and the second movable spring seat are distributed substantially in parallel, and the first movable spring seat and the second movable spring seat are each composed of a plurality of spring seats stacked together. The first movable spring seat is provided with a first bent portion protruding in the direction of the second spring seat, and the second movable spring seat is provided with a second bent portion protruding in the direction of the first spring seat. The first bent portion and the second bent portion are provided offset from each other. According to an embodiment of the present disclosure, the polyphase electromagnetic relay further includes a magnetic circuit portion and a push card. The base is provided with a partition plate at an intermediate position in the thickness direction to divide the base into an upper layer and a lower layer. The magnetic circuit portion is attached to the upper layer of the base, and the fixed and movable contact cooperation structure is attached to the lower layer of the base. The magnetic circuit portion includes an armature assembly, and the armature assembly is provided with a push arm. The push arm reaches the lower layer of the base and cooperates with the movable spring seat in the fixed and movable contact cooperation structure via the push card.

[0013] Another aspect of the present disclosure provides a polyphase electromagnetic relay, including lead-out terminals of a plurality of paths and a plurality of fixed and movable contact cooperation structures. The lead-out terminals of each path each include an incoming line terminal and an outgoing line terminal. A fixed and movable contact cooperation structure is provided between the incoming line terminal and the outgoing line terminal of the same path. The plurality of incoming line terminals are provided on one side of the fixed and movable contact cooperation structure, and the plurality of outgoing line terminals are provided on the other side of the fixed and movable contact cooperation structure. Between the plurality of incoming line terminals, between the plurality of outgoing line terminals, and between the plurality of incoming line terminals and the plurality of outgoing line terminals, they are spaced apart from each other and do not intersect. The external connection ends of the plurality of incoming line terminals and the external connection ends of the plurality of outgoing line terminals all extend in the same direction. The external connection end of the incoming line terminal and the external connection end of the outgoing line terminal of the same path are provided corresponding to both sides of the fixed and movable contact cooperation structure.

[0014] According to an embodiment of the present disclosure, the external connection ends of the plurality of incoming line terminals and the external connection ends of the plurality of outgoing line terminals are arranged in a row. According to an embodiment of the present disclosure, the plurality of incoming line terminals and the plurality of outgoing line terminals are provided opposite to each other, and the plurality of incoming line terminals and the plurality of outgoing line terminals each include an L-shaped body. The L-shaped body includes a first portion and a second portion, and one end of the second portion is the external connection end.

[0015] According to an embodiment of the present disclosure, the body is a sheet-type structure.

[0016] According to an embodiment of the present disclosure, the first portion and the second portion are of an integral structure.

[0017] According to an embodiment of the present disclosure, the first portion and the second portion are two independent members and are fixed to each other by welding.

[0018] According to an embodiment of the present disclosure, the second portion of the plurality of incoming line terminals includes a separator for collecting current signals.

[0019] According to an embodiment of the present disclosure, the external connection ends of the zero-line incoming line and the external connection ends of the zero-line outgoing line are distributed between the external connection ends of the plurality of incoming line terminals and the external connection ends of the plurality of outgoing line terminals, and the external connection ends of the zero-line incoming line and the external connection ends of the zero-line outgoing line are connected by an electrical connection piece.

[0020] According to an embodiment of the present disclosure, the external connection ends of the plurality of incoming line terminals, the external connection ends of the plurality of outgoing line terminals, the external connection ends of the zero-line incoming line, and the external connection ends of the zero-line outgoing line are arranged in a row.

[0021] According to an embodiment of the present disclosure, it further includes a plurality of external connection members, and the plurality of external connection members are respectively provided at the external connection ends of the plurality of incoming line terminals and the external connection ends of the plurality of outgoing line terminals.

[0022] According to an embodiment of the present disclosure, each of the external connection members includes a welding piece, at least one annular terminal, and a bolt corresponding to each of the annular terminals. One end of the welding piece is welded and fixed to the incoming line terminal or the outgoing line terminal, and the at least one annular terminal is movably arranged at the other end of the welding piece.

[0023] According to an embodiment of the present disclosure, each of the external connection members includes at least one annular terminal and a bolt corresponding to each of the annular terminals, and further includes a plurality of external connection members movably arranged on the plurality of external connection ends respectively.

[0024] According to an embodiment of the present disclosure, the fixed and movable contact cooperation structure includes a first fixed spring seat, a first fixed contact, a first movable spring seat, a first movable contact, a second fixed spring seat, a second fixed contact, a second movable spring seat, and a second movable contact. The first fixed contact is fixed to one end of the first fixed spring seat and one end of the first movable spring seat. The first movable contact is fixed to the other end of the first movable spring seat. The second fixed contact is fixed to one end of the second fixed spring seat and one end of the second movable spring seat. The second movable contact is fixed to the other end of the second movable spring seat. The first fixed contact cooperates with the second movable contact correspondingly, and the second fixed contact cooperates with the first movable contact correspondingly. The first fixed spring seat operates as the incoming line terminal, and the second fixed spring seat operates as the outgoing line terminal.

[0025] According to an embodiment of the present disclosure, the first movable spring seat and the second movable spring seat are substantially parallel, and the first movable spring seat and the second movable spring seat are each composed of a plurality of spring seats stacked. The first movable spring seat is provided with a first bending portion protruding in the direction of the second spring seat, and the second movable spring seat is provided with a second bending portion protruding in the direction of the first spring seat. The first bending portion and the second bending portion are arranged offset from each other. According to an embodiment of the present disclosure, it further includes a base, the incoming line terminal and the outgoing line terminal are respectively drawn out from two opposite sides of the base to the outside, and the external connection terminal is located outside the base.

[0026] According to an embodiment of the present disclosure, the polyphase electromagnetic relay further includes a magnetic circuit part and a push card. The base is provided with a partition plate at an intermediate position in the thickness direction to divide the base into an upper layer and a lower layer. The magnetic circuit part is mounted on the upper layer of the base, the fixed and movable contact cooperation structure is mounted on the lower layer of the base, the magnetic circuit part includes an armature assembly, a push arm is provided on the armature assembly, the push arm passes through the partition plate and reaches the lower layer of the base, and cooperates with the movable spring seat in the fixed and movable contact cooperation structure through the push card.

[0027] According to an embodiment of the present disclosure, the base is in the shape of a rectangular parallelepiped and includes a first side wall and a second side wall facing each other, and a third side wall connected to the first side wall and the second side wall. The incoming line terminal is drawn out to the outside perpendicular to the first side wall and extends by bending in the direction of the third side wall. The outgoing line terminal is drawn out to the outside perpendicular to the second side wall and extends by bending in the direction of the third side wall. A plurality of the external connection terminals are arranged in a row parallel to the third side wall.

[0028] According to an embodiment of the present disclosure, a plurality of slots are respectively provided on the first side wall and the second side wall of the base. The fixed and movable contact cooperation structure includes a first fixed spring seat, a first fixed contact, a first movable spring seat, a first movable contact, a second fixed spring seat, a second fixed contact, a second movable spring seat, and a second movable contact. The first fixed contact is fixed to one end of the first fixed spring seat and one end of the first movable spring seat. The first movable contact is fixed to the other end of the first movable spring seat. The second fixed contact is fixed to one end of the second fixed spring seat and one end of the second movable spring seat. The second movable contact is fixed to the other end of the second movable spring seat. The first fixed contact cooperates with the second movable contact correspondingly. The second fixed contact cooperates with the first movable contact correspondingly. The first fixed spring seat operates as the incoming line terminal, and the second fixed spring seat operates as the outgoing line terminal. Each first fixed spring seat is respectively inserted into the slot on the first side wall. One end of the first fixed spring seat is closer to the first side wall than the second side wall. Each second fixed spring seat is respectively inserted into the slot on the second side wall. One end of the second fixed spring seat is closer to the second side wall than the first side wall.

[0029] Compared with the prior art, the beneficial effects of the polyphase electromagnetic relay of the present disclosure are as follows: The polyphase electromagnetic relay of the present disclosure draws each incoming line terminal outwards from one of the four side walls of the base, and each outgoing line terminal is drawn outwards from the second side wall of the base. The second side wall and the first side wall are provided opposite to each other. Each of the incoming line terminals and each of the outgoing line terminals are bent outwards of the third side wall of the base so as not to intersect and be spaced apart outside the base. The external connection ends of each incoming line terminal and each outgoing line terminal are arranged in a row parallel to the third side wall outside the third side wall, and the incoming line terminals and the outgoing line terminals on the same path are located at corresponding positions on both sides of the same row. The third side wall is connected between the first side wall and the second side wall. With such a structure of the present disclosure, the intersecting arrangement between copper members (i.e., lead terminals) is avoided, the consumption of copper (the lead terminals are made of copper material) is reduced, the cost is reduced, the forming of copper members (i.e., lead terminals) is simplified, the assembly is easy, the spot welding technology is simplified, and the safety distance between high voltages can be guaranteed.

[0030] Furthermore, in the polyphase electromagnetic relay of the present disclosure, the fixed and movable contact cooperation structure includes a first fixed spring seat, a first fixed contact, a first movable spring seat, a first movable contact, a second fixed spring seat, a second fixed contact, a second movable spring seat and a second movable contact. The first fixed contact is fixed to one end of the first fixed spring seat and one end of the first movable spring seat. The first movable contact is fixed to the other end of the first movable spring seat. The second fixed contact is fixed to one end of the second fixed spring seat and one end of the second movable spring seat. The second movable contact is fixed to the other end of the second movable spring seat. The first fixed contact cooperates with the second movable contact correspondingly, and the second fixed contact cooperates with the first movable contact correspondingly. The first fixed spring seat is an incoming line terminal, and the second fixed spring seat is an outgoing line terminal. Such a configuration of the present disclosure designs the fixed and movable contact cooperation structure into a parallel connection structure of a double movable spring assembly, which can save the copper consumption of the movable and fixed spring members inside the relay, and thus reduce the cost.

[0031] The description of the preferred embodiments in the present disclosure will make the above and other objects, features, and advantages of the present disclosure more apparent by the following description with reference to the accompanying drawings.

Brief Description of the Drawings

[0032] The above and other features and advantages of the present disclosure will become more apparent by describing its exemplary embodiments in detail with reference to the drawings.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Figure 21

Figure 22

Figure 23

Figure 24

Figure 25

Figure 26

Figure 27

Figure 28

Figure 29

Figure 30

Figure 31

Mode for Carrying Out the Invention

[0033] Next, with reference to the drawings, exemplary embodiments will be described in more detail. However, the exemplary embodiments can be implemented in various forms and should not be construed as being limited to the embodiments described herein. In this specification, relative terms such as "upper" and "lower" are used to describe the relative relationship of one component of the icon to other components. However, these terms are used herein for convenience only, for example, only in the directions according to the examples described in the drawings. It can be understood that when the icon device is inverted upside down, the component described as "upper" becomes the component that is "lower". Other relative terms, such as "top" and "bottom", have the same meaning. When a structure is "above" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" installed on the other structure, or that the structure is installed "indirectly" by the other structure. The terms "one", "a", "the", and "said" are used to represent the existence of one or more elements / components / etc. The terms "comprising" and "having" are used to mean open inclusion and mean elements / components / etc. that can exist in addition to the listed elements / components / etc. The terms "first", "second", etc. are used only as marks and are not quantity limitations on the objects.

[0034] As shown in FIGS. 1 to 12, the polyphase electromagnetic relay of the present disclosure includes a base 1, lead terminals of a plurality of paths drawn out from the inside of the base to the outside, and a plurality of fixed and movable contact cooperation structures mounted inside the base. The lead terminal of each path includes one incoming line terminal and one outgoing line terminal, and a fixed and movable contact cooperation structure is combined between the incoming line terminal and the outgoing line terminal of the same path.

[0035] This embodiment is a three-phase electromagnetic relay for controlling a three-phase power supply in a power system, and includes three input terminals 21, 22, 23 and three output terminals 31, 32, 33. Here, the input terminal 21 and the output terminal 31 are one path, the input terminal 22 and the output terminal 32 are one path, and the input terminal 23 and the output terminal 33 are one path.

[0036] As shown in FIGS. 1, 3 and 5, the base 1 is in the shape of a rectangular parallelepiped and includes an upper case 11, a lower case 13, and four side walls connected between the upper case 11 and the lower case 13. Here, the four side walls are the first side wall 121, the second side wall 122, the third side wall 123, and the fourth side wall respectively. Here, the first side wall 121 and the second side wall 122 are provided opposite to each other. The three input terminals 21, 22, 23 are respectively drawn out from the first side wall 121 of the base 1 to the outside, bent and extended to the third side wall 123. The three input terminals 21, 22, 23 have a certain interval without intersecting each other, and one external connection end is provided at the end of each input terminal. The three output terminals 31, 32, 33 are respectively drawn out from the second side wall 122 of the base to the outside, bent and extended toward the third side wall 123. The three output terminals 31, 32, 33 have a certain interval without intersecting each other, and one external connection end is provided at the end of each output terminal. The external connection ends 211, 221, 231 of the three input terminals 21, 22, 23 and the external connection ends 311, 321, 331 of the three output terminals 31, 32, 33 are arranged in a row parallel to the third side wall on the outside of the third side wall 123, and the input terminals and output terminals of the same path are symmetrically arranged. As shown in FIG. 3, the input terminal 23 at the leftmost first position and the output terminal 33 at the rightmost first position belong to the same path, the input terminal 22 at the second position inward on the left and the output terminal 32 at the second position inward on the right belong to the same path, and the input terminal 21 at the third position inward on the left and the output terminal 31 at the third position inward on the right belong to the same path.

[0037] In this embodiment, an external connection end 411 of a ground wire incoming line and an external connection end 412 of a ground wire outgoing line are further provided between the external connection ends 211, 221, 231 of the three incoming line terminals 21, 22, 23 and the external connection ends 311, 321, 331 of the three outgoing line terminals 31, 32, 33. The external connection end 411 of the ground wire incoming line and the external connection end 412 of the ground wire outgoing line are connected via an electrical connection piece 41.

[0038] As shown in FIGS. 2 and 4, in this embodiment, an external connection member is provided at each external connection end, and the same external connection member 5 is used for each external connection end (including the external connection ends 211, 221, 231 of the three incoming line terminals 21, 22, 23, the external connection ends 311, 321, 331 of the three outgoing line terminals 31, 32, 33, the external connection end 411 of the ground wire incoming line, and the external connection end of the ground wire outgoing line).

[0039] In this embodiment, the external connection member 5 includes two annular terminals 51 and a welding piece 52. The two annular terminals 51 are movably provided at one end of the welding piece 52, and the other end of the welding piece 52 is welded and fixed corresponding to one of the incoming line terminal, the outgoing line terminal, and the electrical connection piece. For example, the other end of the welding piece 52 of the external connection member 5 for the incoming line terminal is welded and fixed to the incoming line terminal, the other end of the welding piece 52 of the external connection member 5 for the outgoing line terminal is welded and fixed to the outgoing line terminal, the other end of the welding piece 52 of the external connection member 5 for the incoming line terminal is welded and fixed to the incoming line terminal, and the other end of the welding piece 52 of the external connection member 5 for the ground wire incoming line and the ground wire outgoing line is welded and fixed to the electrical connection piece 41. The annular terminal 51 further has a bottle 53, and by fixing the external wiring to one end of the welding piece 52 with the bottle, the annular terminal 51 is also fixed.

[0040] As shown in FIGS. 5 and 7, the three input terminals 21, 22, 23 and the three output terminals 31, 32, 33 are all of sheet-type structures. Each of the input terminals and each of the output terminals includes a first portion that protrudes outward from within the pace perpendicular to the sidewall of the pace, and a second portion that is bent and connected to the first portion, and the external connection end is located at the second portion. Specifically, the input terminal 21 includes a first portion 212 that protrudes outward from within the pace perpendicular to the first sidewall 121 of the pace, and a second portion 213 that is bent and connected to the first portion 212, and the external connection end 211 is located at the second portion 213. The input terminal 22 includes a first portion 222 that protrudes from within the pace perpendicular to the first sidewall 121 of the pace, and a second portion 223 that is bent and connected to the first portion 222, and the external connection end 221 is located at the second portion 223. The input terminal 23 includes a first portion 232 that protrudes from within the pace perpendicular to the first sidewall 121 of the pace, and a second portion 233 that is bent and connected to the first portion 232, and the external connection end 231 is located at the second portion 233. The output terminal 31 includes a first portion 312 that protrudes from within the pace perpendicular to the second sidewall 122 of the pace, and a second portion 313 that is bent and connected to the first portion 312, and the external connection end 311 is located at the second portion 313. The output terminal 32 includes a first portion 322 that protrudes outward from within the pace perpendicular to the second sidewall 122 of the pace, and a second portion 323 that is bent and connected to the first portion 322, and the external connection end 321 is located at the second portion 323. The output terminal 33 includes a first portion 332 that protrudes outward from within the pace perpendicular to the second sidewall 122 of the pace, and a second portion 333 that is bent and connected to the first portion 332, and the external connection end 331 is located at the second portion 333. In this embodiment, the first part 212 and the second part 213 of the incoming line terminal 21 are of an integral structure, the first part 222 and the second part 223 of the incoming line terminal 22 are of an integral structure, the first part 232 and the second part 233 of the incoming line terminal 23 are two independent members, the first part 232 and the second part 233 are welded and fixed at the bending position, the first part 312 and the second part 313 of the outgoing line terminal 31 are integrally connected at the bending position, the first part 322 and the second part 323 of the outgoing line terminal 32 are integrally connected at the bending position, the first part 332 and the second part 333 of the outgoing line terminal 33 are two independent members, and the first part 332 and the second part 333 are welded and fixed at the bending position.

[0041] As shown in FIG. 6, the second parts 213, 223, 233 of the three incoming line terminals 21, 22, 23 each include separators 214, 224, 234 for collecting current signals. A separator 413 for collecting current signals is also provided on the electrical connection piece 41.

[0042] As shown in FIGS. 7 and 11, the three fixed and movable contact cooperation structures 61, 62, 63 provided corresponding to the three incoming line terminals 21, 22, 23 and the three outgoing line terminals 31, 32, 33 are all structurally the same.

[0043] As shown in FIGS. 8 and 9, the fixed and movable contact cooperation structure will be described by taking the fixed and movable contact cooperation structure 62 provided corresponding to between the incoming line terminal 22 and the outgoing line terminal 32 as an example. The fixed and movable contact cooperation structure 62 includes a first fixed spring seat 621, a first fixed contact 622, a first movable spring seat 623, a first movable contact 624, a second fixed spring seat 625, a second fixed contact 626, a second movable spring seat 627 and a second movable contact 628. The first fixed contact 622 is fixed to one end of the first fixed spring seat 621 and one end of the first movable spring seat 623. The first movable contact 624 is fixed to the other end of the first movable spring seat 623. The second fixed contact 626 is fixed to one end of the second fixed spring seat 625 and one end of the second movable spring seat 627. The second movable contact 628 is fixed to the other end of the second movable spring seat 627. The first fixed contact 622 is provided corresponding to the second movable contact 628. The second fixed contact 626 is provided corresponding to the first movable contact 624. The first fixed spring seat 621 is the incoming line terminal 22, and the second fixed spring seat 625 is the outgoing line terminal 32.

[0044] As shown in FIG. 7, three slots 124 are respectively provided on the first side wall 121 and the second side wall 122 of the base 1. Each first fixed spring seat (corresponding incoming line terminal) is respectively inserted into the slot 124 of the first side wall 121 of the base 1. One end of the first fixed spring seat is closer to the first side wall than the second side wall. Each second fixed spring seat (corresponding outgoing line terminal) is respectively inserted into the slot 124 of the second side wall 122 of the base 1. One end of the second fixed spring seat is closer to the second side wall than the first side wall.

[0045] As shown in FIGS. 9 and 12, taking the fixed and movable contact cooperation structure 62 provided correspondingly between the incoming line terminal 22 and the outgoing line terminal 32 as an example, the first movable spring sheet 623 is substantially parallel to the second movable spring sheet 627. The first movable spring sheet 623 and the second movable spring sheet 727 are each composed of a plurality of spring sheets stacked. The first movable spring sheet 623 is provided with a first bending portion 6231 protruding in the direction of the second spring sheet. The second movable spring sheet 627 is provided with a second bending portion 6271 protruding in the direction of the first spring sheet. The first bending portion 6231 and the second bending portion 6271 are provided offset from each other.

[0046] As shown in FIG. 5, the polyphase electromagnetic relay in this embodiment further includes a magnetic circuit portion 7 and push cards 8. The base 1 is provided with a partition plate 14 at an intermediate position in the thickness direction to divide the base 1 into an upper layer and a lower layer. The magnetic circuit portion 7 is attached to the upper layer of the base 1, and the fixed and movable contact cooperation structure is attached to the lower layer of the base 1. The magnetic circuit portion 7 includes an armature assembly 9. A push arm 72 is provided on the armature assembly 9. The push arm 72 passes through the partition plate 14 and reaches the lower layer of the base 1, and cooperates with the movable spring sheet in the fixed and movable contact cooperation structure via the push card 8. There are two push cards 8 in this embodiment.

[0047] For the polyphase electromagnetic relay of the present disclosure, each of the incoming line terminals 21, 22, 23 is drawn out from the first side wall 121 of the four side walls of the base 1 to the outside, each outgoing line terminal 31, 32, 33 is drawn out from the second side wall 122 of the base 1 to the outside, and the second side wall 122 and the first side wall 121 are provided opposite to each other. Each of the incoming line terminals 21, 22, 23 and each of the outgoing line terminals 31, 32, 33 are bent and extended to the outside of the third side wall 123 of the base so as not to intersect with each other at intervals outside the base, and the external connection ends 211, 221, 231 of each of the incoming line terminals 21, 22, 23 and the external connection ends 311, 321, 331 of each of the outgoing line terminals 31, 32, 33 are arranged in a row parallel to the third side wall outside the third side wall, and the incoming line terminals and the outgoing line terminals on the same path are located at corresponding positions on both sides of the same row. The third side wall 123 is vertically connected between the first side wall 121 and the second side wall 122. Such a structure of the present disclosure avoids the staggered arrangement between the copper members (i.e., the lead terminals), reduces the consumption of copper (the lead terminals are made of copper material), reduces the cost, simplifies the forming of the copper members (i.e., the lead terminals), is easy to assemble, simplifies the spot welding technology, and can guarantee the safety distance between high voltages.

[0048] In the polyphase electromagnetic relay of the present disclosure, the fixed and movable contact cooperation structure includes a first fixed spring seat, a first fixed contact, a first movable spring seat, a first movable contact, a second fixed spring seat, a second fixed contact, a second movable spring seat and a second movable contact. The first fixed contact is fixed to one end of the first fixed spring seat and one end of the first movable spring seat. The first movable contact is fixed to the other end of the first movable spring seat. The second fixed contact is fixed to one end of the second fixed spring seat and one end of the second movable spring seat. The second movable contact is fixed to the other end of the second movable spring seat. The first fixed contact cooperates with the second movable contact correspondingly, and the second fixed contact cooperates with the first movable contact correspondingly. The first fixed spring seat is an incoming line terminal, and the second fixed spring seat is an outgoing line terminal. Such a configuration of the present disclosure designs the fixed and movable contact cooperation structure into a parallel connection structure of a double movable spring assembly, which can save the copper consumption of the movable and fixed spring members inside the relay, and thus reduce the cost.

[0049] In other embodiments, as shown in FIGS. 8, 9, 11 and 12, the polyphase electromagnetic relay of the present disclosure does not include a base. Specifically, the polyphase electromagnetic relay includes lead terminals of a plurality of paths and a plurality of fixed and movable contact cooperation structures. Each lead terminal of each path includes an incoming line terminal and an outgoing line terminal respectively, and a fixed and movable contact cooperation structure is provided between the incoming line terminal and the outgoing line terminal of the same path. Here, the plurality of incoming line terminals are provided on one side of the fixed and movable contact cooperation structure, and the plurality of outgoing line terminals are provided on the other side of the fixed and movable contact cooperation structure. Between the plurality of incoming line terminals, between the plurality of outgoing line terminals, and between the plurality of incoming line terminals and the plurality of outgoing line terminals, they are not staggered with each other at intervals. The plurality of incoming line terminals and the plurality of outgoing line terminals each have an external connection end, and the plurality of external connection ends are arranged in a row. The external connection ends of the incoming line terminal and the outgoing line terminal of the same path are provided corresponding to both sides of the fixed and movable contact cooperation structure.

[0050] Other configurations of the polyphase electromagnetic relay without a base are the same as those of the polyphase electromagnetic relay with a base, and the description is omitted here.

[0051] In addition, the present disclosure proposes a connection structure between the lead-out piece and the base of an electromagnetic relay. The relay is an electronic control device, having a control system (also called an input circuit) and a controlled system (also called an output circuit), and is usually applied to an automatic control circuit. Since it is an automatic switch that actually controls a large current with a small current, it plays roles such as automatic adjustment, safety protection, and conversion circuit in an electrical path. The electromagnetic relay of the prior art includes a base, a magnetic circuit part, a contact part, an armature assembly, and a push card. The magnetic circuit part and the contact part are respectively attached to the base, and the armature assembly cooperates with the magnetic circuit part, and the armature assembly can be operated when the magnetic circuit part operates. The push card is connected between the movable spring seat of the contact part and the armature assembly, and can move the swing of the movable spring seat when the armature assembly operates, and realize the closing or separation of the movable and fixed contacts. The contact part of such an electromagnetic relay usually includes a lead-out piece, including a movable spring lead-out piece and a fixed spring lead-out piece. Here, the fixed spring lead-out piece and the fixed spring seat (that is, the member to which the fixed contact is fixed) are of an integral structure. The connection structure between the lead-out piece and the base of the electromagnetic relay of the prior art usually has a first slot provided on the side wall of the base, a second slot provided in the base, the middle section of the lead-out piece is inserted into the first slot of the base, the outer section of the lead-out piece comes out of the base and is used to be electrically connected to an external member, the inner section of the lead-out piece is inside the base, and the end of the inner section of the lead-out piece is used to position with the second slot in the base. Such a connection structure between the lead-out piece and the base of the prior art usually adopts bevel positioning (that is, the end of the inner section of the lead-out piece is used as the bevel), which is easy to come off during assembly, the bevel dimension is difficult to manage, and it is difficult to adjust.

[0052] Therefore, the present disclosure provides a connection structure between the lead-out piece and the base of an electromagnetic relay. Through the improvement of the structure, the firmness of the assembly of the lead-out piece can be guaranteed, making it difficult to escape, while the difficulty of positioning and adjusting the lead-out piece can be well reduced.

[0053] The technical solution adopted by the present disclosure to solve its technical problems is the connection structure between the lead-out piece of the electromagnetic relay and the base, including the base and the lead-out piece. A first slot is provided on the side wall of the base, and a second slot is provided in the base. The middle section of the lead-out piece is inserted into the first slot of the base. The outer section of the lead-out piece extends out of the base and is used to be electrically connected to an external member. The inner section of the lead-out piece is inside the base. A Z-shaped insertion piece is provided at the end of the inner section of the lead-out piece. The Z-shaped insertion piece is inserted into the second slot of the base, and the position of the lead-out piece on the base is adjusted by utilizing the height difference between the two straight-side sections of the Z-shaped insertion piece.

[0054] According to an embodiment of the present disclosure, the thickness of the Z-shaped insertion piece is smaller than the thickness of the main body of the lead-out piece.

[0055] According to an embodiment of the present disclosure, the Z-shaped insertion piece has a first straight-side section integrally connected to the main body of the lead-out piece, a second straight-side section with a free end, and an inclined-side section integrally connected between the first straight-side section and the second straight-side section. A press-fit is formed between the second straight-side section and the second slot of the base.

[0056] According to an embodiment of the present disclosure, the second straight-side section of the Z-shaped insertion piece is offset from the range of the thickness of the main body of the lead-out piece in the direction of the thickness of the main body of the lead-out piece.

[0057] According to an embodiment of the present disclosure, on the slot wall of the second slot of the base, a first protrusion protrudes from one slot wall facing the outer surface of the second straight-side section of the Z-shaped insertion piece to the outer surface of the second straight-side section of the Z-shaped insertion piece. The positioning of the lead-out piece on the base is realized by the first protrusion and the second straight-side section of the Z-shaped insertion piece.

[0058] According to an embodiment of the present disclosure, on the slot wall of the second slot of the base, from another slot wall facing the inner surface of the second straight-side segment of the Z-shaped insertion piece, a second protrusion protrudes toward the inner surface of the second straight-side segment of the Z-shaped insertion piece, and the second protrusion and the second straight-side segment of the Z-shaped insertion piece realize an interference fit between the lead-out piece and the base.

[0059] According to an embodiment of the present disclosure, the area where the first protrusion abuts against the outer surface of the second straight-side segment of the Z-shaped insertion piece is larger than the area where the second protrusion abuts against the inner surface of the second straight-side segment of the Z-shaped insertion piece.

[0060] According to an embodiment of the present disclosure, the lead-out piece is a fixed spring sheet, and at the end of the inner step of the lead-out piece, it is further fixed and connected to a fixed contact.

[0061] According to an embodiment of the present disclosure, one end of a movable spring sheet is further connected to the end of the inner step of the lead-out piece, a movable contact is fixed to the other end of the movable spring sheet, and two lead-out pieces and the movable spring sheets to which the two lead-out pieces are respectively connected constitute a set of fixed and movable contact cooperation structures. Here, the fixed contact to which one lead-out piece is connected corresponds to the movable contact of the movable spring sheet to which the other lead-out piece is connected, and the fixed contact to which the other lead-out piece is connected corresponds to the movable contact of the movable spring sheet to which the one lead-out piece is connected. On two opposite side walls of the base, first slots corresponding to the middle steps of the two lead-out pieces are respectively provided.

[0062] According to an embodiment of the present disclosure, the fixed and movable contact cooperation structures are multiple sets. A plurality of first slots are sequentially provided on the side wall of the base, and a plurality of second slots are correspondingly provided in the base. The middle steps of the two lead-out pieces of the multiple sets of fixed and movable contact cooperation structures are respectively arranged in the first slots of the base. Compared with the prior art, the beneficial effects of the connection structure between the lead-out piece and the base of the electromagnetic relay of the present disclosure are as follows:

[0063] In the present disclosure, a Z-shaped insertion piece is provided at the end of the inner step of the lead-out piece, and the Z-shaped insertion piece at the end of the inner step of the lead-out piece is inserted into the second slot of the base. Such a configuration of the present disclosure can utilize the drop between the two straight-side segments of the Z-shaped insertion piece to adjust the positioning position of the lead-out piece on the base. The present disclosure can ensure the firmness of the assembly of the lead-out piece, make it difficult to escape, and at the same time can well reduce the difficulty of positioning and adjusting the lead-out piece.

[0064] Hereinafter, the present disclosure will be described in more detail with reference to FIGS. 14 to 22 and embodiments. However, the connection structure between the lead-out piece and the base of the electromagnetic relay of the present disclosure is not limited to the embodiments.

[0065] As shown in FIGS. 13 to 21, the connection structure between the lead-out piece and the base of the electromagnetic relay in the present disclosure includes a base 1 and a lead-out piece 2. A first slot 120 is provided on the side wall 12 of the base 1, and a second slot 130 is provided inside the base 1. The middle step of the lead-out piece 2 is inserted into the first slot 120 of the base 1. The outer step 210 of the lead-out piece 2 extends out of the base 1 and is electrically connected to an external member. The inner step 220 of the lead-out piece 2 is inside the base 1. A Z-shaped insertion piece 3 is provided at the end of the inner step 220 of the lead-out piece 2. The Z-shaped insertion piece 3 at the end of the inner step of the lead-out piece 2 is inserted into the second slot 130 of the base 1 to adjust the positioning position of the lead-out piece 2 on the base 1 by utilizing the drop between the two straight-side segments of the Z-shaped insertion piece 3.

[0066] As shown in FIGS. 13 to 15, in this embodiment, the electromagnetic relay using this connection structure further includes a magnetic circuit part 7, an armature assembly 9, and a push card 8. The base 1 has a two-layer structure. The magnetic circuit part 7 and the armature assembly 9 are attached to one of its layers, and the contact part including the push card 8 and the lead-out piece 2 is attached to another layer. The push arm of the armature assembly 9 extends from one layer of the base 1 to the other layer of the base 1 and cooperates with the movable spring seat of the contact part.

[0067] As shown in FIG. 16, in this embodiment, the thickness of the Z-shaped insertion piece 3 is smaller than the thickness of the main body of the extraction piece 2.

[0068] In this embodiment, the Z-shaped insertion piece 3 includes a first straight side section 310 integrally connected to the main body of the extraction piece 2, a second straight side section 320 having a free end, and a hypotenuse section 330 integrally connected between the first straight side section and the second straight side section. A press fit is formed between the second straight side section 320 and the second slot 130 of the base 1.

[0069] In this embodiment, the second straight side section 320 of the Z-shaped insertion piece 3 is offset from the range of the thickness of the main body of the extraction piece 2 in the direction of the thickness of the main body of the extraction piece 2.

[0070] In this embodiment, on the slot wall of the second slot 130 of the base 1, a first protrusion 140 protrudes from one slot wall 131 facing the outer surface of the second straight side section 320 of the Z-shaped insertion piece 3 to the outer surface of the second straight side section 320 of the Z-shaped insertion piece 3. By utilizing the cooperation between the first protrusion 140 and the second straight side section 320 of the Z-shaped insertion piece 3, the positioning of the extraction piece 2 on the base 1 is realized.

[0071] In this embodiment, on the slot wall of the second slot 130 of the base 1, a second protrusion 150 protrudes from the other slot wall 132 facing the inner surface of the second straight side section 320 of the Z-shaped insertion piece 3 to the inner surface of the second straight side section 320 of the Z-shaped insertion piece 3. By utilizing the cooperation between the second protrusion 150 and the second straight side section 320 of the Z-shaped insertion piece 3, the press fit between the extraction piece 2 and the base 1 is realized.

[0072] In this embodiment, the area where the first protrusion 140 abuts against the outer surface of the second straight side section 320 of the Z-shaped insertion piece 3 is larger than the area where the second protrusion 150 abuts against the inner surface of the second straight side section 320 of the Z-shaped insertion piece 3.

[0073] In this embodiment, the extraction piece 2 is a fixed spring sheet, and is further fixed to the fixed contact 71 at the end of the inner step of the extraction piece 2.

[0074] As shown in FIG. 17, in this embodiment, the contact part adopts a parallel connection structure of a double-acting spring assembly. One end of a movable spring sheet 720 is further connected to the end of the inner step 220 of the extraction piece 2 (that is, the end of the inner step 220 of the extraction piece 2 and one end of the movable spring sheet 720 are fixed by a fixed contact 710), and a movable contact 730 is fixed to the other end of the movable spring sheet 720. The two extraction pieces 2 and the movable spring sheets 720 to which the two extraction pieces are respectively connected constitute a set of fixed and movable contact cooperation structures. Here, the fixed contact 710 to which one extraction piece 2 is connected corresponds to the movable contact 730 of the movable spring sheet 72 to which the other extraction piece 2 is connected, and the fixed contact 710 to which the other extraction piece 2 is connected corresponds to the movable contact 730 of the movable spring sheet 720 to which the one extraction piece 2 is connected. First slots 120 for cooperation are respectively provided on two opposite side walls 12 of the base 1 at the intermediate steps of the two extraction pieces 2.

[0075] As shown in FIGS. 13 to 15 and FIG. 17, in this embodiment, the electromagnetic relay is a three-phase electromagnetic holding relay, there are three sets of the fixed and movable contact cooperation structures, three first slots 120 are sequentially provided on two opposite side walls of the base 1, six second slots are correspondingly provided in the base, and the intermediate steps of the two extraction pieces 2 of the three sets of fixed and movable contact cooperation structures are respectively arranged in the first slots 120 on two opposite side walls 12 of the base.

[0076] The connection structure between the lead-out piece and the base of the electromagnetic relay of the present disclosure is such that a Z-shaped insertion piece 3 is provided at the end of the inner step 220 of the lead-out piece 2, and the Z-shaped insertion piece 3 at the end of the inner step of the lead-out piece 2 is inserted into the second slot 130 of the base 1. With such a configuration of the present disclosure, by utilizing the drop between the two straight-side segments of the Z-shaped insertion piece 3, the positioning position of the lead-out piece 2 on the base 1 can be adjusted. The present disclosure can ensure the firmness of the assembly of the lead-out piece 2 and make it difficult to escape, while being able to well reduce the difficulty of positioning and adjusting the lead-out piece 2.

[0077] In addition, the present disclosure proposes an electromagnetic relay with a push card.

[0078] A relay is an electronic control device that has a control system (also called an input circuit) and a controlled system (also called an output circuit). It is usually applied to an automatic control circuit and is actually an automatic switch that controls a large current with a small current. Therefore, it plays roles such as automatic adjustment, safety protection, and conversion circuit in an electrical circuit. The armature is an important member in an electromagnetic relay. Through the cooperation of the armature and the magnetic circuit part of the electromagnetic relay, the movable spring of the contact part of the electromagnetic relay can be operated, and the closing or separation of the movable and fixed contacts can be realized. In the electromagnetic relay of the prior art, plastic and the armature are injection-molded to form an armature assembly, and a push arm is formed by plastic injection molding. The push card is reciprocated by the push arm of the armature assembly, and further, through the cooperation of the push card and the movable spring seat of the contact part, the movable spring seat is operated, and the closing or separation of the movable and fixed contacts is realized. In such an electromagnetic relay with a push card, the plastic push arm of the armature assembly can receive the reaction force transmitted by the push card by the movable spring seat. Especially when applied to a plurality of sets of movable spring seats, the reaction force received by the plastic push arm of the armature assembly becomes larger. The pure plastic push arm is extremely easy to deform due to heat and water absorption in a high-temperature and high-humidity environment, the adsorption state of the product becomes unstable, and it affects the normal use of the electromagnetic relay.

[0079] The object of the present disclosure is to overcome the deficiencies of the prior art and provide an electromagnetic relay with a push card. Through the improvement of the structure, the push-pull strength of the plastic push arm of the armature assembly can be increased, and when applied to a plurality of sets of movable spring seats, it can adapt to the larger reaction force transmitted from the movable spring seat through the push card, and in a high-temperature and high-humidity environment, it is not easy to deform due to heat and water absorption, and the stability of the suction state of the product can be guaranteed.

[0080] The technical solution adopted by the present disclosure to solve its technical problems is to provide an electromagnetic relay with a push card including a base, a magnetic circuit part, an armature assembly, and a part in contact with the push card. The magnetic circuit part, the armature assembly, and the contact part are respectively attached to pre-arranged positions of the base. The magnetic circuit part and the armature assembly can be made to correspond to each other. The push card is arranged between the armature assembly and the contact part. The armature assembly includes an armature and a plastic member covering a part of the armature. A plastic push arm extending in the direction of the push card is provided on the plastic member. A first engagement groove is provided on the push card. The plastic push arm of the armature assembly is arranged in the first engagement groove of the push card. A metal insert integrally extending from the plastic push arm is further provided on the armature. The plastic push arm completely covers the metal insert, and the metal insert is used to increase the push-pull strength of the plastic push arm of the armature assembly, and solve the problem that the plastic push arm is easily deformed by heat and water absorption in a high-temperature and high-humidity environment.

[0081] According to an embodiment of the present disclosure, the base is divided into upper and lower two layers. The magnetic circuit part and the armature assembly are attached to the upper layer of the base. The contact part is attached to the lower layer of the base. The push card cooperates with the contact part in the lower layer of the base. The plastic push arm with a metal insert of the armature assembly extends from the upper layer of the base to the lower layer of the base and cooperates with the push card.

[0082] According to an embodiment of the present disclosure, there are two armatures in the armature assembly. The armature assembly further includes magnetic steel, which is sandwiched between the two armatures. The plastic member covers the middle portions of the two armatures and the magnetic steel. The metal insert is provided at the edge of the length of one of the two armatures.

[0083] According to an embodiment of the present disclosure, the metal insert is bent at an angle with respect to the body surface of one armature, and the metal insert is biased outward with respect to the one armature. The thickness of the metal insert is smaller than the thickness of one body of the one armature.

[0084] According to an embodiment of the present disclosure, the metal insert includes a first portion that is part of the width range of the body of the one armature, and a second portion that extends outside the width by the first portion that is outside the width range of the body of the one armature. According to an embodiment of the present disclosure, the plastic member is provided with a rotating shaft that can be mounted in the base, and the rotating shaft is offset from the center line position of the member composed of the two armatures and one magnetic steel.

[0085] According to an embodiment of the present disclosure, there are two push cards. The plastic member is provided with two plastic push arms for fitting corresponding to the two push cards. The metal inserts are respectively provided at both ends of the length of the one armature, and the two plastic push arms are respectively covered by the metal inserts at both ends of the length of the one armature.

[0086] According to an embodiment of the present disclosure, the axes of the two plastic push arms and the axis of the rotating shaft are in the same plane.

[0087] According to an embodiment of the present disclosure, the two push cards are each provided with a plurality of second engaging grooves for matching the contact portions, the plurality of second engaging grooves are distributed along the longitudinal direction of the push card, and the first engaging groove is provided between a pair of adjacent second engaging grooves.

[0088] According to an embodiment of the present disclosure, the contact portion includes a plurality of sets of fixed and movable contact cooperation structures. Each set of fixed and movable contact cooperation structures includes a first fixed spring seat, a first fixed contact, a first movable spring seat, a first movable contact, a second fixed spring seat, a second fixed contact, a second movable spring seat, and a second movable contact. The first fixed contact is fixed to one end of the first fixed spring seat and one end of the first movable spring seat. The first movable contact is fixed to the other end of the first movable spring seat. The second fixed contact is fixed to one end of the second fixed spring seat and one end of the second movable spring seat. The second movable contact is fixed to the other end of the second movable spring seat. The first fixed contact cooperates with the second movable contact correspondingly, and the second fixed contact cooperates with the first movable contact correspondingly. The corresponding second engaging grooves of the two push cards cooperate with the other end of the first movable spring seat and the other end of the second movable spring seat respectively.

[0089] Compared with the prior art, the beneficial effects of the electromagnetic relay with push cards of the present disclosure are as follows:

[0090] 1. In the present disclosure, the armature is further provided with a metal insert that extends integrally with the plastic push arm, and the plastic push arm completely covers the metal insert. Such a structure of the present disclosure can increase the push-pull strength of the plastic push arm of the armature assembly by utilizing the metal insert, solving the problem that the pure plastic swing arm in the prior art is prone to deformation due to heat and water absorption in a high-temperature and high-humidity environment, resulting in an unstable adsorption state of the product, and can improve the deformation. The present disclosure can also solve the problem that the deformation dimensions of the pure iron swing arm due to heat treatment are unstable and the dispersion between lots with different thicknesses of the iron strip material is large. Such an armature assembly of the present disclosure, when it is necessary to adjust the dimensions, only needs to adjust the injection mold and does not need to adjust the iron member, which is advantageous for dimension management and control.

[0091] 2. In the present disclosure, the base is divided into upper and lower two layers, and the plastic push arm with a metal insert of the armature assembly extends from the upper layer of the base to the lower layer of the base to cooperate with the push card. The armature assembly adopts an eccentric double swing arm structure, and the swing arm (i.e., the plastic push arm) extends downward, and the swing arm and the movable spring are located in the same layer. With such a configuration of the present disclosure, the armature assembly can synchronously drive the operations of the two push cards, and the push-pull contact point and the movement direction can be on the same straight line.

[0092] 3. In the present disclosure, the contact part is designed with a plurality of sets of fixed and movable contact cooperation structures, and each set of fixed and movable contact cooperation structures adopts a parallel connection structure of a double moving spring assembly. Such a structure of the present disclosure can increase the strength of the plastic push arm of the armature assembly by utilizing the metal insert. A plurality of sets of movable spring sheets receive the reaction force transmitted through the push card, and the stability of the adsorption state of the product can be guaranteed.

[0093] The present disclosure will be described in more detail below based on FIGS. 22 to 31 and the embodiments. However, one of the electromagnetic relays with a push card of the present disclosure is not limited to the embodiments.

[0094] As shown in FIGS. 22 to 31, the electromagnetic relay with a push card of the present disclosure includes a base 1, a magnetic circuit portion 7, an armature assembly 9, a push card 8, and a contact portion 6. The magnetic circuit portion 7, the armature assembly 9, and the contact portion 6 are respectively attached to predetermined positions of the base 1, and the magnetic circuit portion 7 and the armature assembly 9 can be made to correspond to each other. The push card 8 is disposed between the armature assembly 9 and the contact portion 6. The armature assembly 9 includes an armature 91 and a plastic member 92 that covers a part of the armature. The plastic member 92 is provided with a plastic push arm 921 that extends in the direction of the push card. The push card 8 is provided with a first engagement groove 81. The plastic push arm 921 of the armature assembly 9 is disposed in the first engagement groove 81 of the push card 8. A metal insert 60 extends integrally from the plastic push arm 921 to the armature 91. The plastic push arm 921 completely covers the metal insert 60, and the metal insert 60 is used to increase the push-pull strength of the plastic push arm 921 of the armature assembly 9, thereby solving the problem that the plastic push arm 921 is prone to deformation due to heat and water absorption in a high-temperature and high-humidity environment.

[0095] In this embodiment, the base 1 is divided into upper and lower two layers. The base 1 includes an upper case 11, a side wall 12 surrounded in a circle, a lower case 13, and a partition plate 14. The upper case 11 and the lower case 13 are respectively fixed to the upper end and the lower end of the side wall 12, and the partition plate 14 is installed inside the side wall 12. The upper case 11, the side wall 12, and the partition plate 14 surround the upper layer of the base 1, and the lower case 13, the side wall 12, and the partition plate 14 surround the lower layer of the base 1. The magnetic circuit portion 7 and the armature assembly 9 are installed on the upper layer of the base 1, the contact portion 6 is installed on the lower layer of the base 1, the push card 8 cooperates with the contact portion 6 in the lower layer of the base 1, and the plastic push arm 921 with a metal insert of the armature assembly 9 extends from the upper layer of the base to the lower layer of the base and cooperates with the push card 8.

[0096] In this embodiment, the armature 91 in the armature assembly 9 includes two armatures 911 and 912. The armature assembly 9 further includes a magnetic steel 93. The magnetic steel 93 is sandwiched between the two armatures 911 and 912. The plastic member 92 covers the intermediate portions of the two armatures 911 and 912 and the magnetic steel 93. The armature assembly 9 has an I-shaped structure. The metal insert 60 is provided at the edge of the length of one of the two armatures 911 and 912, i.e., armature 911.

[0097] In this embodiment, the metal insert 60 is bent at an angle with respect to the main body surface of the one armature 911, the metal insert 60 is biased outward with respect to the one armature 911, and the thickness of the metal insert 60 is smaller than the thickness of the main body of the one armature 911.

[0098] In this embodiment, the metal insert 60 includes a first portion 601 that is part of the width range of the main body of the one armature 911, and a second portion 603 that extends beyond the width by the first portion 601 outside the width range of the main body of the one armature 911.

[0099] In this embodiment, the plastic member 92 is provided with a rotating shaft 922 that can be mounted within the pace, whereby the armature assembly 9 can swing about the rotating shaft 922, and the plastic push arm 921 can swing. The magnetic circuit portion 7 includes a coil 201 and a yoke 202 and one end of each of the two yokes 220 of the magnetic circuit portion 7 extends to the openings on both sides of the I-shaped structure of the armature assembly 9. The rotating shaft 922 is offset from the center line position of the member composed of the two armatures 911, 912 and one magnetic steel 93.

[0100] In this embodiment, there are two push cards 8, and the plastic member 92 is provided with two plastic push arms 921 for fitting corresponding to the two push cards 8. The metal inserts 60 are respectively provided at both ends of the length of the one armature 911, and the two plastic push arms 921 are respectively covered by the metal inserts 60 at both ends of the length of the one armature 911.

[0101] In this embodiment, the axes of the two plastic push arms 921 and the axis of the rotating shaft 922 are in the same plane.

[0102] In this embodiment, each of the two push cards 8 is provided with three second engaging grooves 82 for matching with the contact portion 6. The three second engaging grooves 82 are distributed along the longitudinal direction of the push card 8, and the first engaging groove 8 is provided between a pair of adjacent second engaging grooves 82.

[0103] In this embodiment, the contact portion 6 includes three sets of fixed and movable contact cooperation structures. Each set of fixed and movable contact cooperation structures includes a first fixed spring seat 621, a first fixed contact 622, a first movable spring seat 623, a first movable contact 624, a second fixed spring seat 625, a second fixed contact 626, a second movable spring seat 627, and a second movable contact 628. The first fixed contact 622 is fixed to one end of the first fixed spring seat 621 and one end of the first movable spring seat 623. The first movable contact 624 is fixed to the other end of the first movable spring seat 623. The second fixed contact 626 is fixed to one end of the second fixed spring seat 625 and one end of the second movable spring seat 627. The second movable contact 628 is fixed to the other end of the second movable spring seat 627. The first fixed contact 622 corresponds to the second movable contact 628, and the second fixed contact 626 corresponds to the first movable contact 624. The corresponding second engaging grooves 82 of the two push cards 8 correspond to the other ends of the first movable spring seat 621 and the second movable spring seat 625.

[0104] In the electromagnetic relay with a push card according to the present disclosure, the armature 911 is further provided with a metal insert 60 integrally extending from the plastic push arm 921, and the plastic push arm 921 completely covers the metal insert 60. Such a structure of the present disclosure can increase the push-pull strength of the plastic push arm 921 of the armature assembly 9 by using the metal insert 60, solve the problem that the pure plastic swing arm in the prior art is prone to thermal water absorption deformation in a high-temperature and high-humidity environment, resulting in an unstable adsorption state of the product, and can improve the deformation. The present disclosure can also solve the problem that the heat treatment deformation dimensions of the pure iron swing arm are unstable and the dispersion between lots with different thicknesses of the iron strip material is large. Such an armature assembly of the present disclosure only needs to adjust the injection mold when the dimensions need to be adjusted, without the need to adjust the iron member, which is advantageous for dimension management and control.

[0105] The electromagnetic relay with a push card according to the present disclosure divides the base 1 into upper and lower two layers, and the plastic push arm 921 with a metal insert of the armature assembly 9 extends from the upper layer of the base 1 to the lower layer of the base 1 and cooperates with the push card 8. The armature assembly 9 adopts an eccentric double swing arm structure, the swing arm (i.e., the plastic push arm) extends long downward, and the swing arm and the movable spring are located in the same layer. With such a configuration of the present disclosure, the armature assembly 9 can synchronously drive the operations of the two push cards 8, and the push-pull contact point and the movement direction can be on the same straight line.

[0106] The electromagnetic relay with a push card according to the present disclosure designs the contact part 6 into a structure of three sets of fixed and movable contact cooperation. And each set of fixed and movable contact cooperation structure adopts a parallel connection structure of a double movable spring assembly. Such a structure of the present disclosure utilizes the metal insert 60 to increase the strength of the plastic push arm 921 of the armature assembly 9, receives the reaction force transmitted through the push card 8 by the three sets of movable spring sheets, and can guarantee the stability of the attracted state of the product.

[0107] It should be understood that the present disclosure is not limited to the detailed structures and arrangement methods of the components proposed in this specification. The present disclosure can have other embodiments and can be realized and executed in various ways. The foregoing deformations and variations are within the scope of the present disclosure. It should be understood that the present disclosure disclosed and limited in this specification extends to all alternative combinations of all the distinct features described in the text and / or drawings or that are apparent. All these different combinations constitute a plurality of alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best methods for realizing the present disclosure and explain how those skilled in the art can utilize the present disclosure.

Claims

1. A polyphase electromagnetic relay including extraction terminals of a plurality of paths and a plurality of fixed and movable contact cooperation structures, wherein the extraction terminals of each path include an incoming line terminal and an outgoing line terminal respectively, and a fixed and movable contact cooperation structure is provided between the incoming line terminal and the outgoing line terminal of the same path, wherein the plurality of incoming line terminals are provided on one side of the fixed and movable contact cooperation structure, the plurality of outgoing line terminals are provided on the other side of the fixed and movable contact cooperation structure, and there is no interleaving with a space between the plurality of incoming line terminals, between the plurality of outgoing line terminals, and between the plurality of incoming line terminals and the plurality of outgoing line terminals. The external connection ends of the plurality of incoming line terminals and the plurality of outgoing line terminals all extend in the same direction, and the external connection end of the incoming line terminal and the external connection end of the outgoing line terminal of the same path are provided corresponding to both sides of the fixed and movable contact cooperation structure, wherein an external connection end of a zero line incoming line and an external connection end of a zero line outgoing line are distributed between the external connection ends of the plurality of incoming line terminals and the external connection ends of the plurality of outgoing line terminals, and the external connection end of the zero line incoming line and the external connection end of the zero line outgoing line are connected by an electrical connection piece A polyphase electromagnetic relay characterized by the above.

2. The external connection ends of the plurality of incoming line terminals and the external connection ends of the plurality of outgoing line terminals are arranged in a row The polyphase electromagnetic relay according to Claim 1, characterized by the above.

3. The plurality of incoming line terminals and the plurality of outgoing line terminals are provided opposite to each other, and the plurality of incoming line terminals and the plurality of outgoing line terminals each include an L-shaped main body. The L-shaped main body includes a first part and a second part, and one end of the second part is the external connection end The polyphase electromagnetic relay according to Claim 1, characterized by the above.

4. The main body has a sheet-like structure The polyphase electromagnetic relay according to Claim 3, characterized by the above.

5. The first part and the second part are of an integral structure The polyphase electromagnetic relay according to Claim 3, characterized by the above.

6. The first part and the second part are two independent members fixed to each other by welding The polyphase electromagnetic relay according to Claim 3, characterized by the above.

7. The second part of the plurality of incoming line terminals includes a separator for collecting current signals The polyphase electromagnetic relay according to Claim 3, characterized by the above.

8. The external connection ends of the plurality of input terminals, the external connection ends of the plurality of output terminals, the external connection end of the zero wire input, and the external connection end of the zero wire output are arranged in a row. The polyphase electromagnetic relay according to claim 1, characterized in that.

9. Further comprising a plurality of external connection members, wherein the plurality of external connection members are respectively provided at the external connection ends of the plurality of input terminals and the external connection ends of the plurality of output terminals. The polyphase electromagnetic relay according to claim 1, characterized in that.

10. Each of the external connection members includes a welding piece, at least one annular terminal, and a bolt adapted to each of the annular terminals. One end of the welding piece is welded and fixed to the input terminal or the output terminal, and the at least one annular terminal is movably arranged at the other end of the welding piece. The polyphase electromagnetic relay according to claim 9, characterized in that.

11. Each of the external connection members includes at least one annular terminal and at least one bolt adapted to the at least one annular terminal, and the plurality of external connection ends are movably arranged at the plurality of external connection ends respectively. The polyphase electromagnetic relay according to claim 9, characterized in that.

12. The fixed and movable contact cooperation structure includes a first fixed spring seat, a first fixed contact, a first movable spring seat, a first movable contact, a second fixed spring seat, a second fixed contact, a second movable spring seat, and a second movable contact. The first fixed contact is fixed to one end of the first fixed spring seat and one end of the first movable spring seat. The first movable contact is fixed to the other end of the first movable spring seat. The second fixed contact is fixed to one end of the second fixed spring seat and one end of the second movable spring seat. The second movable contact is fixed to the other end of the second movable spring seat. The first fixed contact cooperates with the second movable contact correspondingly, and the second fixed contact cooperates with the first movable contact correspondingly. The first fixed spring seat operates as the input terminal, and the second fixed spring seat operates as the output terminal. The polyphase electromagnetic relay according to claim 1, characterized in that.

13. The first movable spring seat and the second movable spring seat are substantially parallel to each other, and the first movable spring seat and the second movable spring seat are each composed of a plurality of spring seats laminated together. The first movable spring seat is provided with a first bent portion protruding in the direction of the second spring seat, and the second movable spring seat is provided with a second bent portion protruding in the direction of the first spring seat. The first bent portion and the second bent portion are arranged offset from each other. The polyphase electromagnetic relay according to claim 12, characterized in that.

14. Further including a base, the input terminal and the output terminal are respectively drawn out to the outside from two opposite sides of the base, and the external connection terminal is located outside the base. The polyphase electromagnetic relay according to any one of claims 1 to 13, characterized in that.

15. The polyphase electromagnetic relay further includes a magnetic circuit portion and a push card. The base is provided with a partition plate at an intermediate position in the thickness direction to divide the base into an upper layer and a lower layer. The magnetic circuit portion is attached to the upper layer of the base, and the fixed and movable contact cooperation structure is attached to the lower layer of the base. The magnetic circuit portion includes an armature assembly, and a push arm is provided on the armature assembly. The push arm passes through the partition plate and reaches the lower layer of the base, and cooperates with the movable spring seat in the fixed and movable contact cooperation structure through the push card. The polyphase electromagnetic relay according to claim 14, characterized in that.

16. The base has a rectangular parallelepiped shape and includes a first side wall and a second side wall facing each other, and a third side wall connected to the first side wall and the second side wall. The input terminal is drawn out to the outside perpendicular to the first side wall and extends by bending in the direction of the third side wall. The output terminal is drawn out to the outside perpendicular to the second side wall and extends by bending in the direction of the third side wall. A plurality of the external connection terminals are arranged in a row parallel to the third side wall. The polyphase electromagnetic relay according to claim 14, characterized in that.

17. A plurality of slots are respectively provided on the first side wall and the second side wall of the base. The fixed and movable contact cooperation structure includes a first fixed spring seat, a first fixed contact, a first movable spring seat, a first movable contact, a second fixed spring seat, a second fixed contact, a second movable spring seat, and a second movable contact. The first fixed contact is fixed to one end of the first fixed spring seat and one end of the first movable spring seat. The first movable contact is fixed to the other end of the first movable spring seat. The second fixed contact is fixed to one end of the second fixed spring seat and one end of the second movable spring seat. The second movable contact is fixed to the other end of the second movable spring seat. The first fixed contact cooperates with the second movable contact correspondingly, and the second fixed contact cooperates with the first movable contact correspondingly. The first fixed spring seat operates as the incoming line terminal, and the second fixed spring seat operates as the outgoing line terminal. Each first fixed spring seat is respectively inserted into the slot of the first side wall. One end of the first fixed spring seat is closer to the first side wall than the second side wall. Each second fixed spring seat is respectively inserted into the slot of the second side wall. One end of the second fixed spring seat is closer to the second side wall than the first side wall. The polyphase electromagnetic relay according to claim 16, characterized in that.

Images