Multi-phase electromagnetic relay

Abstract

To provide an improved connection structure.SOLUTION: There is provided a connection structure of a lead-out piece and a base of an electromagnetic relay. Therein: a base and a lead-out piece are included; a first slot is provided in a side wall of the base; a second slot is provided in the base; a middle stage of the lead-out piece is fitted into the first slot of the base; an outer step of the lead-out piece protrudes outside the base and is used to be electrically connected to an external member; an inner step of the lead-out piece is inside the base; an end of the inner section of the lead-out piece is provided with a Z-shaped insertion piece; and the Z-shaped insertion piece is fitted into the second slot of the base to adjust a positioning position of the lead-out piece on the base by using a height difference between two linear side steps of the Z-shaped insertion piece.SELECTED DRAWING: Figure 13

Description

[Technical Field]

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

[0002] The present disclosure relates to the field of power technology, and more particularly to polyphase electromagnetic relays. [Background technology]

[0003] Multiphase electromagnetic relays are primarily used in power systems, using two or more sets of contacts, each consisting of two or more sets of movable and fixed spring members, to turn on or off power to a load. For example, a three-phase electromagnetic relay has three sets of contacts, each consisting of three sets of movable and fixed spring members, to control the on or off of three-phase electricity in a load. Such multiphase electromagnetic relays typically include a base and multiple lead-out terminals extending from the base to the outside. Each lead-out terminal includes an incoming terminal and an outgoing terminal, and the incoming terminal and outgoing terminal of the same path are connected to the same set of movable and fixed contact structures in the base. When the movable contacts of the same set contact the fixed contacts, the incoming terminal and outgoing terminal of the same path are connected, and when the movable contacts and fixed contacts of the same set separate, the incoming terminal and outgoing terminal of the same path are not connected.

[0004] In such prior art multi-phase electromagnetic relays, the incoming and outgoing terminals of the same path are usually adjacent to each other and drawn out from the base, but due to the need for external wiring, such as the need for 1-input / 8-output wiring in a three-phase electromagnetic relay, some incoming or outgoing terminals must be drawn across the incoming or outgoing terminals of other paths, resulting in some incoming and outgoing terminals being distributed in an interlaced manner. Multi-phase electromagnetic relays with such interlaced and distributed outgoing terminals consume a lot of copper (the outgoing terminals are made of copper), are expensive, require complex copper member molding, require complex assembly and spot welding techniques, and pose a risk to the safety distance between high voltages. Furthermore, in such prior art multi-phase electromagnetic relays, the incoming and outgoing terminals of the same path each use a fixed spring seat and a moving spring lead piece, and the movable and fixed spring members inside the relay form a Z-bend structure, resulting in the disadvantages of 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, avoids the need for intertwined arrangement of copper members (i.e., lead-out terminals), further solves the complicated problems of insulation and spot welding, and reduces copper consumption, while also saving copper consumption in the movable and fixed spring members inside the relay, thereby reducing costs. One aspect of the present disclosure provides a multiphase electromagnetic relay, including a base, lead-out terminals of a plurality of paths extending from within the base to the outside, and a plurality of fixed and movable contact cooperation structures attached within the base, each of the lead-out terminals of the paths including an incoming line terminal and an outgoing line terminal, and a fixed and movable contact cooperation structure provided between the incoming line terminal and the outgoing line terminal of the same path, the base having a rectangular parallelepiped shape, each of the incoming line terminals extending to the outside from a first side wall of the base, and each of the outgoing line terminals extending from the base to the outside. The input and output terminals are drawn out from a second side wall of the base, the second side wall and the first side wall are arranged opposite each other, the input terminals and the output terminals are bent out of a third side wall of the base so as to be spaced apart and not intersected outside the base, the external connection ends of the input terminals and the external connection ends of the output terminals are arranged in a row parallel to the third side wall outside the third side wall, the input terminals and output terminals of the same path are respectively located at corresponding positions on both sides of the same row, and the third side wall is connected between the first side wall and the second side wall.

[0006] According to one embodiment of the present disclosure, the external connection ends of the zero line incoming wires and the external connection ends of the zero line outgoing wires are distributed between the external connection ends of each incoming wire terminal and the external connection ends of each outgoing wire terminal, and the external connection ends of the zero line incoming wires and the external connection ends of the zero line outgoing wires are connected by electrical connecting pieces. According to one embodiment of the present disclosure, an external connection member is provided at each external connection end, the external connection member including 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, 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, and the annular terminal further has a bolt. According to one embodiment of the present disclosure, each of the input terminals and output terminals has a sheet-type structure, and each of the input terminals and output terminals includes a first portion that protrudes outward from within the base perpendicular to the side wall of the base, and a second portion that is bent and connected to the first portion, and the external connection end is located on the second portion.

[0007] According to one embodiment of the present disclosure, the first and second portions are integrally connected at the bend.

[0008] According to one embodiment of the present disclosure, the first and second parts are two independent members, and the first and second parts are welded and fixed at the bending points.

[0009] According to one embodiment of the present disclosure, the second portion of each of the input terminals includes a separator for collecting a current signal.

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

[0011] According to one 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 of the first fixed spring sheets is respectively inserted into the slot on the first side wall of the base, and one end of the first fixed spring sheet is closer to the first side wall than the second side wall, and each of the second fixed spring sheets is respectively inserted into the slot on the second side wall of the base, and one end of the second fixed spring sheet is closer to the second side wall than the first side wall.

[0012] According to one embodiment of the present disclosure, the first movable spring sheet and the second movable spring sheet are distributed approximately parallel, the first movable spring sheet and the second movable spring sheet are each formed by stacking a plurality of spring sheets, the first movable spring sheet has a first bending portion protruding in the direction of the second spring sheet, the second movable spring sheet has a second bending portion protruding in the direction of the first spring sheet, and the first bending portion and the second bending portion are offset from each other. According to one embodiment of the present disclosure, the multi-phase electromagnetic relay further includes a magnetic circuit portion and a push card, the base has a partition plate at a thickness midpoint 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, the fixed and movable contact cooperation structure is attached to the lower layer of the base, the magnetic circuit portion includes an armature assembly, 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 multi-phase electromagnetic relay, comprising: lead-out terminals of a plurality of paths; and a plurality of fixed and movable contact cooperating structures; each lead-out terminal of each path includes an incoming line terminal and an outgoing line terminal; a fixed and movable contact cooperating structure is provided between the incoming line terminal and the outgoing line terminal of the same path; the incoming line terminals are provided on one side of the fixed and movable contact cooperating structure; and the outgoing line terminals are provided on the other side of the fixed and movable contact cooperating structure; the incoming line terminals, the outgoing line terminals, and the incoming line terminals and the outgoing line terminals are spaced apart from each other and do not intersect; external connection ends of the incoming line terminals and the outgoing line terminals all extend in the same direction; and the external connection ends of the incoming line terminals and the outgoing line terminals of the same path are provided on opposite sides of the fixed and movable contact cooperating structure.

[0014] According to one 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 aligned in a row. According to one embodiment of the present disclosure, the plurality of incoming terminals and the plurality of outgoing terminals are arranged opposite each other, and each of the plurality of incoming terminals and the plurality of outgoing terminals includes 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 one embodiment of the present disclosure, the body is a sheet-type structure.

[0016] According to one embodiment of the present disclosure, the first and second portions are of unitary construction.

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

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

[0019] According to one embodiment of the present disclosure, the external connection ends of the zero line incoming wires and the external connection ends of the zero line outgoing wires are distributed between the external connection ends of the plurality of incoming wire terminals and the external connection ends of the plurality of outgoing wire terminals, and the external connection ends of the zero line incoming wires and the external connection ends of the zero line outgoing wires are connected by electrical connecting pieces.

[0020] According to one 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 end of the zero-line incoming line, and the external connection end of the zero-line outgoing line are arranged in a row.

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

[0022] According to one embodiment of the present disclosure, each of the external connection members includes a welding piece, at least one ring terminal, and a bolt that fits to each of the ring 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 ring terminal is movably arranged on the other end of the welding piece.

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

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

[0025] According to one embodiment of the present disclosure, the first movable spring sheet and the second movable spring sheet are approximately parallel, the first movable spring sheet and the second movable spring sheet are each formed by stacking a plurality of spring sheets, the first movable spring sheet has a first bending portion protruding in the direction of the second spring sheet, the second movable spring sheet has a second bending portion protruding in the direction of the first spring sheet, and the first bending portion and the second bending portion are arranged offset from each other. According to an embodiment of the present disclosure, the device further includes a base, the incoming terminal and the outgoing terminal are respectively extended to the outside from two opposite sides of the base, and the external connection end is located outside the base.

[0026] According to one embodiment of the present disclosure, the polyphase electromagnetic relay further includes a magnetic circuit portion and a push card, the base has a partition plate at a thickness midpoint 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, 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, which passes through the partition plate to reach 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.

[0027] According to one embodiment of the present disclosure, the base has a rectangular parallelepiped shape and includes opposing first and second side walls and a third side wall connected to the first and second side walls, the incoming line terminal is drawn outward perpendicular to the first side wall and extends by bending toward the third side wall, the outgoing line terminal is drawn outward perpendicular to the second side wall and extends by bending toward the third side wall, and the plurality of external connection ends are arranged in a row parallel to the third side wall.

[0028] According to one embodiment of the present disclosure, a plurality of slots are respectively provided on a first side wall and a second side wall of the base, and the fixed and movable contact cooperation structure includes a first fixed spring sheet, a first fixed contact, a first movable spring sheet, a first movable contact, a second fixed spring sheet, a second fixed contact, a second movable spring sheet, and a second movable contact, wherein the first fixed contact is fixed to one end of the first fixed spring sheet and one end of the first movable spring sheet, the first movable contact is fixed to the other end of the first movable spring sheet, the second fixed contact is fixed to one end of the second fixed spring sheet and one end of the second movable spring sheet, and the second movable contact is fixed to the second movable spring sheet. a first fixed contact corresponding to and cooperating with a second movable contact, the second fixed contact corresponding to and cooperating with the first movable contact, the first fixed spring sheet acting as the incoming line terminal, the second fixed spring sheet acting as the outgoing line terminal, each first fixed spring sheet being inserted into a slot in the first side wall, one end of the first fixed spring sheet being closer to the first side wall than the second side wall, and each second fixed spring sheet being inserted into a slot in the second side wall, one end of the second fixed spring sheet being 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 has each incoming terminal drawn out from a first side wall, one of four side walls of the base, and each outgoing terminal drawn out from a second side wall of the base, the second side wall and the first side wall being arranged opposite each other, the incoming terminals and outgoing terminals being bent outward to the outside of a third side wall of the base so as to be spaced apart and not intertwined outside the base, the external connection ends of the incoming terminals and outgoing terminals being arranged in a row parallel to the third side wall outside the third side wall, and the incoming terminals and outgoing terminals of the same path being located at corresponding positions on both sides of the same row, and the third side wall being connected between the first side wall and the second side wall. Such a structure of the present disclosure can avoid the arrangement of intertwined copper members (i.e., lead terminals), reduce copper consumption (the lead terminals are made of copper material), reduce costs, simplify the molding of the copper members (i.e., lead terminals), facilitate assembly, simplify spot welding techniques, and ensure a safe distance between high voltages.

[0030] Furthermore, in the multi-phase electromagnetic relay disclosed herein, the fixed and movable contact cooperation structure includes a first fixed spring sheet, a first fixed contact, a first movable spring sheet, a first movable contact, a second fixed spring sheet, a second fixed contact, a second movable spring sheet and a second movable contact, wherein the first fixed contact is fixed to one end of the first fixed spring sheet and one end of the first movable spring sheet, the first movable contact is fixed to the other end of the first movable spring sheet, the second fixed contact is fixed to one end of the second fixed spring sheet and one end of the second movable spring sheet, and the second movable contact is fixed to the other end of the second movable spring sheet, the first fixed contact cooperates with the second movable contact, and the second fixed contact cooperates with the first movable contact, the first fixed spring sheet is an incoming terminal and the second fixed spring sheet is an outgoing terminal. In this configuration of the present disclosure, the fixed and movable contacts are designed to cooperate with each other in a parallel connection structure of a double moving spring assembly, which can reduce copper consumption in the movable and fixed spring members inside the relay and thus reduce costs.

[0031] The above and other objects, features, and advantages of the present disclosure will become more apparent from the following description of preferred embodiments of the present disclosure taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0032] These and other features and advantages of the present disclosure will become more apparent from the detailed description of illustrative embodiments thereof, taken in conjunction with the drawings. [Figure 1] FIG. 1 is a perspective structural schematic diagram of an embodiment of a polyphase electromagnetic relay according to the present disclosure. [Figure 2] FIG. 2 is a front view of FIG. [Figure 3] FIG. 2 is a plan view of FIG. [Figure 4] FIG. 2 is a side view of FIG. [Figure 5] FIG. 1 is a schematic diagram of an exploded perspective structure according to an embodiment of the present disclosure. [Figure 6] FIG. 1 is a perspective structural schematic diagram (with the upper case removed) of an embodiment of the present disclosure. [Figure 7] FIG. 1 is a perspective structural schematic diagram of an embodiment of the present disclosure (with the bottom facing up and the lower case removed). [Figure 8] 1 is a schematic diagram of a fixed and movable contact cooperating structure according to an embodiment of the present disclosure; [Figure 9] 1 is a plan view of a fixed and movable contact cooperating structure according to an embodiment of the present disclosure; FIG. [Figure 10] 10 is a schematic diagram of the cooperation of each fixed and movable contact cooperating structure with a magnetic circuit part and a push card in an embodiment of the present disclosure. FIG. [Figure 11] 1 is a schematic diagram (bottom up) of the cooperation of each fixed and movable contact cooperating structure with a magnetic circuit part and a push card in an embodiment of the present disclosure; [Figure 12] 10 is a schematic diagram of the cooperation of a movable spring seat with a push card and an armature assembly in an embodiment of the present disclosure. FIG. [Figure 13] 10 is a diagram illustrating the configuration of another embodiment of an electromagnetic relay using the present disclosure, showing the connection structure between the pull-out piece and the base. FIG. [Figure 14]FIG. 15 is a plan view of FIG. [Figure 15] FIG. 15 is a bottom view of FIG. [Figure 16] FIG. 16 is an enlarged schematic view of part A in FIG. [Figure 17] 14 is a schematic diagram showing the distribution of three sets of fixed and movable contact cooperation structures in the electromagnetic relay shown in FIG. 13. FIG. [Figure 18] 14 is a schematic diagram showing cooperation between a pull-out piece and a movable spring sheet in the electromagnetic relay shown in FIG. 13. FIG. [Figure 19] FIG. 19 is a bottom view of FIG. [Figure 20] FIG. 14 is a configuration diagram of a movable spring sheet in the electromagnetic relay shown in FIG. [Figure 21] FIG. 21 is a plan view of FIG. 20. [Figure 22] FIG. 1 is a perspective exploded view of an embodiment of an electromagnetic relay with a push card of the present disclosure. [Figure 23] FIG. 23 is a perspective exploded view of the cooperation of the armature assembly and push card in the embodiment shown in FIG. 22. [Figure 24] FIG. 23 is a perspective structural schematic diagram of an armature assembly in the embodiment shown in FIG. 22. [Figure 25] FIG. 23 is a schematic diagram of cooperation between the armature assembly, the push card, and the magnetic circuit portion in the embodiment shown in FIG. 22. [Figure 26] FIG. 23 is a perspective structural schematic diagram of the cooperation between the armature and the magnetic steel in the armature assembly in the embodiment shown in FIG. 22. [Figure 27] 23 is a schematic diagram of the cooperation of the armature assembly, the push card, and the contact portion in the embodiment shown in FIG. 22. FIG. [Figure 28] FIG. 28 is a plan view of FIG. 27. [Figure 29] FIG. 28 is a bottom view of FIG. [Figure 30] FIG. 28 is a side view of FIG. 27. [Figure 31] FIG. 1 is a schematic diagram of a contact portion in an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0033] Next, exemplary embodiments will be described in more detail with reference to the drawings. However, the exemplary embodiments may be implemented in various forms and should not be understood as being limited to the embodiments described herein. Although relative terms such as "above" and "below" are used herein to describe the relative relationship of one component of an icon to another, these terms are used herein for convenience only in the direction shown in the drawings. It will be understood that if the icon device is flipped upside down, the component described "above" becomes the component "below." Other relative terms, such as "top" and "bottom," have similar meanings. When a structure is "above" another structure, it can mean that the structure is integrally formed with the other structure, that the structure is "directly" attached to the other structure, or that the structure is "indirectly" attached to the other structure. The terms "a," "one," "the," and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprise" and "have" are used to denote an open inclusion and mean that other elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first," "second," etc. are used as indicative terms only and do not constitute a quantitative limitation on their subject matter.

[0034] 1 to 12, the polyphase electromagnetic relay of the present disclosure includes a base 1, lead-out terminals of a plurality of paths extending from within the base to the outside, and a plurality of fixed and movable contact cooperation structures attached within the base. The lead-out terminals of each path include one incoming terminal and one outgoing terminal, and the fixed and movable contact cooperation structure is fitted between the incoming terminal and outgoing 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 incoming terminals 21, 22, and 23 and three outgoing terminals 31, 32, and 33. Here, incoming terminal 21 and outgoing terminal 31 form one path, incoming terminal 22 and outgoing terminal 32 form one path, and incoming terminal 23 and outgoing terminal 33 form one path.

[0036] 1, 3, and 5, the base 1 has a rectangular parallelepiped shape 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, the four side walls being a first side wall 121, a second side wall 122, a third side wall 123, and a fourth side wall, respectively, with the first side wall 121 and the second side wall 122 facing each other. Three input terminals 21, 22, and 23 are respectively drawn out from the first side wall 121 of the base 1 to the outside and bent to extend to the third side wall 123. The three input terminals 21, 22, and 23 are spaced apart without intersecting each other, and each input terminal is provided with an external connection terminal at its end. The three output terminals 31, 32, 33 are respectively drawn out from the second side wall 122 of the base to the outside and bent and extended toward the third side wall 123, the three output terminals 31, 32, 33 are spaced apart without intersecting each other, and one external connection terminal is provided at the end of each output terminal. The external connection ends 211, 221, 231 of the three incoming terminals 21, 22, 23 and the external connection ends 311, 321, 331 of the three outgoing terminals 31, 32, 33 are arranged in a row outside the third side wall 123 parallel to said third side wall 123, and the incoming terminals and outgoing terminals of the same path are arranged symmetrically, and as shown in Figure 3, the incoming terminal 23 in the first position on the left and the outgoing terminal 33 in the first position on the right belong to the same path, the incoming terminal 22 in the second position inward to the left and the outgoing terminal 32 in the second position inward to the right belong to the same path, and the incoming terminal 21 in the third position inward to the left and the outgoing terminal 31 in the third position inward to the right belong to the same path.

[0037] In this embodiment, an external connection end 411 of the zero line input and an external connection end 412 of the zero line output are provided between 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, and the external connection end 411 of the zero line input and the external connection end 412 of the zero line output are connected via an electrical connection piece 41.

[0038] As shown in Figures 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 input terminals 21, 22, 23, the external connection ends 311, 321, 331 of the three output terminals 31, 32, 33, the external connection end 411 of the input zero line and the external connection end of the output zero 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 being movably mounted on one end of the welding piece 52, and the other end of the welding piece 52 being welded to one of the incoming terminal, outgoing terminal, and electrical connection piece. For example, the other end of the welding piece 52 of the external connection member 5 for the incoming terminal is welded to the incoming terminal, the other end of the welding piece 52 of the external connection member 5 for the outgoing terminal is welded to the outgoing terminal, the other end of the welding piece 52 of the external connection member 5 for the incoming terminal is welded to the incoming terminal, and the other end of the welding piece 52 of the external connection member 5 for the zero incoming line and zero outgoing line is welded to the electrical connection piece 41. The annular terminal 51 further includes a bolt 53, and the annular terminal 51 is fixed by fixing the external wiring to one end of the welding piece 52 with the bolt.

[0040] As shown in Figures 5 and 7, the three incoming terminals 21, 22, and 23 and the three outgoing terminals 31, 32, and 33 all have a sheet-type structure, and each of the incoming terminals and outgoing terminals includes a first portion that protrudes from within the space perpendicular to the side wall of the space and a second portion that is bent and connected to the first portion, and the external connection end is located on the second portion. Specifically, the incoming terminal 21 includes a first portion 212 that protrudes from within the base to the outside perpendicular to the first side wall 121 of the base, 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 incoming terminal 22 includes a first portion 222 that protrudes from within the base to the first side wall 121 of the base perpendicular to the first portion 222, 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 incoming terminal 23 includes a first portion 232 that protrudes from within the base to the first side wall 121 of the base perpendicular to the first portion 232, 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 extending from within the base perpendicular to the second side wall 122 of the base, and a second portion 313 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 extending from within the base perpendicular to the second side wall 122 of the base, and a second portion 323 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 extending from within the base perpendicular to the second side wall 122 of the base, and a second portion 333 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 portion 212 and the second portion 213 of the incoming terminal 21 have an integral structure, the first portion 222 and the second portion 223 of the incoming terminal 22 have an integral structure, the first portion 232 and the second portion 233 of the incoming terminal 23 are two independent members, and the first portion 232 and the second portion 233 are welded and fixed at the bending point, the first portion 312 and the second portion 313 of the outgoing terminal 31 are integrally connected at the bending point, the first portion 322 and the second portion 323 of the outgoing terminal 32 are integrally connected at the bending point, and the first portion 332 and the second portion 333 of the outgoing terminal 33 are two independent members, and the first portion 332 and the second portion 333 are welded and fixed at the bending point.

[0041] 6, the second portions 213, 223, and 233 of the three input terminals 21, 22, and 23 include separators 214, 224, and 234 for collecting current signals, respectively. The electrical connection piece 41 is also provided with a separator 413 for collecting current signals.

[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 terminals 21, 22, 23 and the three outgoing terminals 31, 32, 33 are all structurally identical.

[0043] 8 and 9, the fixed and movable contacts cooperation structure will be described using a fixed and movable contacts cooperation structure 62 provided correspondingly between the incoming terminal 22 and the outgoing terminal 32 as an example. The fixed and movable contacts cooperation structure 62 includes a first fixed spring sheet 621, a first fixed contact 622, a first movable spring sheet 623, a first movable contact 624, a second fixed spring sheet 625, a second fixed contact 626, a second movable spring sheet 627, and a second movable contact 628. The first fixed contact 622 is fixed to one end of the first fixed spring sheet 621 and one end of the first movable spring sheet 623, and the first movable contact 624 is fixed to the other end of the first movable spring sheet 623. The second fixed contact 626 is fixed to one end of the second fixed spring sheet 625 and one end of the second movable spring sheet 627, the second movable contact 628 is fixed to the other end of the second movable spring sheet 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 sheet 621 is an incoming terminal 22, and the second fixed spring sheet 625 is an outgoing terminal 32.

[0044] As shown in Figure 7, three slots 124 are provided in the first side wall 121 and the second side wall 122 of the base 1, and each first fixed spring sheet (corresponding input terminal) is inserted into the slot 124 in the first side wall 121 of the base 1, with one end of the first fixed spring sheet being closer to the first side wall than to the second side wall, and each second fixed spring sheet (corresponding output terminal) is inserted into the slot 124 in the second side wall 122 of the base 1, with one end of the second fixed spring sheet being closer to the second side wall than to the first side wall.

[0045] As shown in Figures 9 and 12, taking the fixed and movable contact cooperation structure 62 correspondingly arranged between the incoming terminal 22 and the outgoing terminal 32 as an example, the first movable spring sheet 623 is approximately 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 stacked spring sheets, the first movable spring sheet 623 has a first bending portion 6231 protruding toward the second spring sheet, the second movable spring sheet 627 has a second bending portion 6271 protruding toward the first spring sheet, and the first bending portion 6231 and the second bending portion 6271 are arranged 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 a push card 8. A partition plate 14 is provided at the middle of the base 1 in the thickness direction, dividing 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, and a push arm 72 is provided on the armature assembly 9. The push arm 72 passes through the partition plate 14 to reach the lower layer of the base 1 and cooperates with the movable spring seat in the fixed and movable contact cooperation structure via the push card 8. There are two push cards 8 in this embodiment.

[0047] In the polyphase electromagnetic relay of the present disclosure, each of the input terminals 21, 22, 23 is extended to the outside from a first side wall 121 of the four side walls of the base 1, and each of the output terminals 31, 32, 33 is extended to the outside from a second side wall 122 of the base 1, and the second side wall 122 and the first side wall 121 are arranged opposite each other. The incoming terminals 21, 22, 23 and the outgoing terminals 31, 32, 33 are bent and extend outside the third side wall 123 of the base 1 so as to be spaced apart from each other and not intersect with each other outside the base 1, and the external connection ends 211, 221, 231 of the incoming terminals 21, 22, 23 and the external connection ends 311, 321, 331 of the outgoing terminals 31, 32, 33 are arranged in rows parallel to the third side wall 123 outside the third side wall, and the incoming terminals and outgoing terminals of the same path are located at corresponding positions on both sides of the same row, and 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 can avoid the arrangement of intertwined copper members (i.e., lead terminals), reduce copper consumption (the lead terminals are made of copper material), reduce costs, simplify the molding of the copper members (i.e., lead terminals), facilitate assembly, simplify spot welding techniques, and ensure a safe 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 sheet, a first fixed contact, a first movable spring sheet, a first movable contact, a second fixed spring sheet, a second fixed contact, a second movable spring sheet, and a second movable contact, wherein the first fixed contact is fixed to one end of the first fixed spring sheet and one end of the first movable spring sheet, the first movable contact is fixed to the other end of the first movable spring sheet, the second fixed contact is fixed to one end of the second fixed spring sheet and one end of the second movable spring sheet, and the second movable contact is fixed to the other end of the second movable spring sheet, the first fixed contact cooperates with and corresponds to the second movable contact, and the second fixed contact cooperates with and corresponds to the first movable contact, the first fixed spring sheet is an incoming terminal, and the second fixed spring sheet is an outgoing terminal. In this configuration of the present disclosure, the fixed and movable contacts are designed to cooperate with each other in a parallel connection structure of a double moving spring assembly, which can reduce copper consumption in the movable and fixed spring members inside the relay and thus reduce costs.

[0049] In another embodiment, as shown in Figures 8, 9, 11, and 12, the multi-phase electromagnetic relay of the present disclosure does not include a base. Specifically, the multi-phase electromagnetic relay includes a plurality of lead-out terminals and a plurality of fixed and movable contact cooperation structures, each of which includes an incoming terminal and an outgoing terminal. The fixed and movable contact cooperation structure is provided between the incoming terminal and the outgoing terminal of the same path. Here, the incoming terminals are provided on one side of the fixed and movable contact cooperation structure, and the outgoing terminals are provided on the other side of the fixed and movable contact cooperation structure. The incoming terminals, the outgoing terminals, and the incoming and outgoing terminals are spaced apart from each other and do not intersect. Each of the incoming terminals and the outgoing terminals has an external connection end, which is arranged in a row. The external connection ends of the incoming terminals and the outgoing terminals of the same path are provided on opposite sides of the fixed and movable contact cooperation structure.

[0050] The other configurations of the polyphase electromagnetic relay not including the base are the same as those of the polyphase electromagnetic relay including the base, and therefore the description thereof will be omitted here.

[0051] This disclosure also proposes a connection structure between the lead piece and base of an electromagnetic relay. A relay is an electronic control device with a control system (also called an input circuit) and a controlled system (also called an output circuit). It is typically used in automatic control circuits and is essentially an automatic switch that controls large currents with small currents, fulfilling the roles of automatic adjustment, safety protection, and conversion circuitry in the electrical path. Prior art electromagnetic relays include a base, a magnetic circuit portion, a contact portion, an armature assembly, and a push card. The magnetic circuit portion and the contact portion are respectively mounted on the base. The armature assembly cooperates with the magnetic circuit portion, and the armature assembly can be operated when the magnetic circuit portion operates. The push card is connected between the movable spring seat of the contact portion and the armature assembly, and the operation of the armature assembly causes the movable spring seat to swing, thereby closing or separating the movable and fixed contacts. The contact portion of such an electromagnetic relay typically includes a pull-out piece, including a movable spring pull-out piece and a fixed spring pull-out piece, where the fixed spring pull-out piece and the fixed spring seat (i.e., the component to which the fixed contact is fixed) are integrally formed. The connection structure between the pull-out piece and the base of a conventional electromagnetic relay typically includes a first slot on the side wall of the base and a second slot within the base, with the middle section of the pull-out piece inserted into the first slot of the base, the outer section of the pull-out piece extending outside the base for electrical connection with an external component, and the inner section of the pull-out piece located within the base, with the end of the inner section of the pull-out piece being used for positioning with the second slot within the base. Such a conventional connection structure between the pull-out piece and the base typically uses a hypotenuse positioning (i.e., the end of the inner section of the pull-out piece is the hypotenuse), which is prone to coming loose during assembly and makes it difficult to control and adjust the hypotenuse dimension.

[0052] Therefore, the present disclosure provides a connection structure between the drawer piece and the base of an electromagnetic relay, and through structural improvements, can ensure the robustness of the drawer piece assembly and make it less likely to come loose, while also effectively reducing the difficulty of adjusting the positioning of the drawer piece.

[0053] The technical solution adopted in this disclosure to solve the technical problem is a connection structure between the drawer piece and the base of an electromagnetic relay, which includes a base and a drawer piece, a first slot formed on a side wall of the base, a second slot formed within the base, the middle section of the drawer piece inserted into the first slot of the base, the outer section of the drawer piece extending outside the base for electrically connecting with an external component, the inner section of the drawer piece located within the base, a Z-shaped insert piece formed at the end of the inner section of the drawer piece, which is inserted into the second slot of the base, and the position of the drawer piece on the base is adjusted by using the difference in height between the two straight side sections of the Z-shaped insert piece.

[0054] According to one embodiment of the present disclosure, the thickness of the Z-shaped insert piece is less than the thickness of the main body of the pull-out piece.

[0055] According to one embodiment of the present disclosure, the Z-shaped insert piece has a first straight side section integrally connected to the main body of the drawer piece, a second straight side section having a free end, and an oblique side section integrally connected between the first straight side section and the second straight side section, and an interference fit is formed between the second straight side section and a second slot in the base.

[0056] According to one embodiment of the present disclosure, the second straight edge section of the Z-shaped insert piece is offset from the thickness range of the drawer piece body in the thickness direction of the drawer piece body.

[0057] According to one embodiment of the present disclosure, in 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 insert piece onto the outer surface of the second straight side section of the Z-shaped insert piece, and the first protrusion and the second straight side section of the Z-shaped insert piece position the drawer piece in the base.

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

[0059] According to one embodiment of the present disclosure, the area where the first protrusion abuts against the outer surface of the second straight side section of the Z-shaped insert piece is greater than the area where the second protrusion abuts against the inner surface of the second straight side section of the Z-shaped insert piece.

[0060] According to one embodiment of the present disclosure, the pull-out piece is a fixed spring seat, which is fixedly connected to the end of the inner section of the pull-out piece and further to a fixed contact.

[0061] According to one embodiment of the present disclosure, one end of a movable spring sheet is further connected to the end of the inner section of the drawer piece, and a movable contact is fixed to the other end of the movable spring sheet; the two drawer pieces and the movable spring sheets respectively connected to the two drawer pieces form a set of fixed and movable contact cooperation structure, in which the fixed contact connected to one drawer piece corresponds to the movable contact of the movable spring sheet connected to the other drawer piece, and the fixed contact connected to the other drawer piece corresponds to the movable contact of the movable spring sheet connected to the one drawer piece; and first slots are respectively provided on two opposing side walls of the base to respectively correspond to the middle sections of the two drawer pieces.

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

[0063] The present disclosure provides a Z-shaped insert at the end of the inner section of the drawer piece, which is inserted into the second slot of the base. This configuration of the present disclosure allows the position of the drawer piece on the base to be adjusted by utilizing the difference in height between the two straight sides of the Z-shaped insert. This disclosure can ensure the robustness of the drawer piece assembly and make it less likely to come loose, while also effectively reducing the difficulty of adjusting the position of the drawer piece.

[0064] 14 to 22 and examples, the present disclosure will be described in further detail below. However, the connection structure between the pull-out piece and the base of the electromagnetic relay of the present disclosure is not limited to the examples.

[0065] As shown in Figures 13 to 21, the connection structure between the drawer piece and the base of the electromagnetic relay in the present disclosure includes a base 1 and a drawer piece 2, a first slot 120 is provided in the side wall 12 of the base 1, a second slot 130 is provided within the base 1, the middle section of the drawer piece 2 is inserted into the first slot 120 of the base 1, the outer section 210 of the drawer piece 2 extends outside the base 1 and is electrically connected to an external component, the inner section 220 of the drawer piece 2 is within the base 1, a Z-shaped insertion piece 3 is provided at the end of the inner section 220 of the drawer piece 2, and the Z-shaped insertion piece 3 at the end of the inner section of the drawer piece 2 is inserted into the second slot 130 of the base 1 to adjust the position of the drawer piece 2 in the base 1 by utilizing the drop between the two straight side sections of the Z-shaped insertion piece 3.

[0066] As shown in Figures 13 to 15, in this embodiment, the electromagnetic relay using this connection structure further includes a magnetic circuit portion 7, an armature assembly 9, and a push card 8, the base 1 has a two-layer structure, the magnetic circuit portion 7 and the armature assembly 9 are attached to one layer, and the contact portion including the push card 8 and the pull-out piece 2 is attached to another layer, and 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 portion.

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

[0068] In this embodiment, the Z-shaped insert piece 3 includes a first straight side section 310 integrally connected to the main body of the drawer piece 2, a second straight side section 320 having a free end, and a hypotenuse side section 330 integrally connected between the first straight side section and the second straight side section, and a tight 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 edge section 320 of the Z-shaped insert piece 3 is offset from the thickness range of the drawer piece body in the thickness direction of the drawer piece body.

[0070] In this embodiment, in the slot wall of the second slot 130 of the base 1, a first protrusion 140 protrudes from one slot wall 131 toward the outer surface of the second straight side section 320 of the Z-shaped insert piece 3, and the positioning of the drawer piece 2 in the base 1 is achieved by utilizing the cooperation between the first protrusion 140 and the second straight side section 320 of the Z-shaped insert piece 3.

[0071] In this embodiment, a second protrusion 150 protrudes from another slot wall 132 of the second slot 130 of the base 1 toward the inner surface of the second straight edge section 320 of the Z-shaped insert piece 3 on the slot wall of the second slot 130 of the base 1, and the cooperation between the second protrusion 150 and the second straight edge section 320 of the Z-shaped insert piece 3 realizes an interference fit between the drawer piece 2 and the base 1.

[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 insert 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 insert piece 3.

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

[0074] As shown in FIG. 17, in this embodiment, the contact portion adopts a parallel connection structure of a double moving spring assembly, and one end of a movable spring sheet 720 is further connected to the end of the inner section 220 of the drawer piece 2 (i.e., the end of the inner section 220 of the drawer 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 drawer pieces 2 and the movable spring sheets 720 to which the two drawer pieces are respectively connected constitute a set of fixed and movable contact cooperation structure, in which the fixed contact 710 to which one drawer piece 2 is connected corresponds to the movable contact 730 of the movable spring sheet 72 to which the other drawer piece 2 is connected, and the fixed contact 710 to which the other drawer piece 2 is connected corresponds to the movable contact 730 of the movable spring sheet 720 to which the one drawer piece 2 is connected, and the two opposing side walls 12 of the base 1 are respectively provided with first slots 120 for cooperation with the middle stages of the two drawer pieces 2.

[0075] As shown in Figures 13 to 15 and 17, in this embodiment, the electromagnetic relay is a three-phase electromagnetic holding relay, and there are three sets of fixed and movable contact cooperation structures, three first slots 120 are arranged in sequence on two opposing side walls of the base 1, and six second slots are correspondingly arranged in the base, and the middle stages of the two pull-out pieces 2 of the three sets of fixed and movable contact cooperation structures are respectively arranged in the first slots 120 on the two opposing side walls 12 of the base.

[0076] The connection structure between the drawer piece and the base of the electromagnetic relay of the present disclosure employs a Z-shaped insert piece 3 at the end of the inner section 220 of the drawer piece 2, and the Z-shaped insert piece 3 at the end of the inner section of the drawer piece 2 is inserted into the second slot 130 of the base 1. This configuration of the present disclosure can adjust the position of the drawer piece 2 on the base 1 by utilizing the difference in height between the two straight side sections of the Z-shaped insert piece 3. This disclosure can ensure the robustness of the assembly of the drawer piece 2 and make it difficult for it to come loose, while also effectively reducing the difficulty of adjusting the position of the drawer piece 2.

[0077] The present disclosure also proposes an electromagnetic relay with a push card.

[0078] A relay is an electronic control device with a control system (also called an input circuit) and a controlled system (also called an output circuit). It is usually used in automatic control circuits. It is an automatic switch that controls large currents with small currents, and therefore plays roles such as automatic adjustment, safety protection, and conversion circuitry in the electrical path. The armature is a key component of an electromagnetic relay. The armature and the magnetic circuit of the electromagnetic relay work together to operate the movable spring in the contact part of the electromagnetic relay, thereby closing or separating the movable and fixed contacts. In prior art electromagnetic relays, the armature assembly is formed by injection molding plastic and the armature, and the push arm is also formed by plastic injection molding. The push arm of the armature assembly reciprocates the push card, and the push card works together with the movable spring seat in the contact part to operate the movable spring seat, thereby closing or separating the movable and fixed contacts. In such an electromagnetic relay with a push card, the plastic push arm of the armature assembly can withstand the reaction force transmitted by the push card through the movable spring seat. Particularly when multiple sets of movable spring seats are applied, the reaction force experienced by the plastic push arm of the armature assembly will be greater. In a high-temperature and high-humidity environment, the plastic push arm made of pure plastic is very prone to deformation due to heat and water absorption, which will cause the product's adsorption state to become unstable and affect the normal use of the electromagnetic relay.

[0079] The objective of the present disclosure is to overcome the shortcomings of the prior art and provide an electromagnetic relay with a push card. Through structural improvements, the push-pull strength of the plastic push arm of the armature assembly can be increased, and when applied to multiple sets of movable spring seats, the push card can accommodate a greater reaction force transmitted from the movable spring seats. In high temperature and high humidity environments, the relay is less likely to deform due to heat or water absorption, ensuring the stability of the suction state of the product.

[0080] The technical solution adopted by the present disclosure to solve the technical problem provides an electromagnetic relay with a push card, including a base, a magnetic circuit part, an armature assembly, a push card and a contact part, wherein the magnetic circuit part, the armature assembly and the contact part are respectively attached to predetermined positions on the base, so that the magnetic circuit part and the armature assembly can correspond to each other, the push card is disposed between the armature assembly and the contact part, the armature assembly includes an armature and a plastic member covering a part of the armature, and the plastic member is attached to the push card. a plastic push arm extending in a direction perpendicular to the push card, the push card having a first engagement groove, the plastic push arm of the armature assembly being disposed in the first engagement groove of the push card, the armature further having a metal insert extending integrally with the plastic push arm, the plastic push arm completely covering the metal insert, the metal insert being used to increase the push-pull strength of the plastic push arm of the armature assembly, and resolving the problem that the plastic push arm is easily deformed due to heat or water absorption in a high-temperature and high-humidity environment.

[0081] According to one embodiment of the present disclosure, the base is divided into two layers, an upper layer and an lower layer, the magnetic circuit portion and the armature assembly are attached to the upper layer of the base, the contact portion is attached to the lower layer of the base, the push card cooperates with the contact portion on the lower layer of the base, 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 and cooperates with the push card.

[0082] According to one embodiment of the present disclosure, the armature assembly has two armatures, the armature assembly further includes magnetic steel, the magnetic steel is sandwiched between the two armatures, the plastic member is coated on the middle portions of the two armatures and the magnetic steel, and the metal insert is provided on the end edge of one of the two armatures along its length.

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

[0084] According to one embodiment of the present disclosure, the metal insert includes a first portion that is within a portion of the width range of the body of the one armature, and a second portion that continues to extend beyond the width range of the body of the one armature by the first portion. According to one embodiment of the present disclosure, the plastic member has a rotation axis that can be mounted within a base, and the rotation axis is offset from the centerline of the member made of the two armatures and one magnetic steel member.

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

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

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

[0088] According to one embodiment of the present disclosure, the contact portion includes a plurality of sets of fixed and movable contact cooperating structures, each set of fixed and movable contact cooperating structures including a first fixed spring sheet, a first fixed contact, a first movable spring sheet, a first movable contact, a second fixed spring sheet, a second fixed contact, a second movable spring sheet and a second movable contact, the first fixed contact being fixed to one end of the first fixed spring sheet and one end of the first movable spring sheet, the first movable contact being fixed to one end of the first movable spring sheet and the second movable contact, The first fixed contact is fixed to one end of the second fixed spring sheet and one end of the second movable spring sheet, the second movable contact is fixed to the other end of the second movable spring sheet, the first fixed contact corresponds to and cooperates with the second movable contact, and the second fixed contact corresponds to and cooperates with the first movable contact, and the corresponding second engagement grooves of the two push cards respectively cooperate with the other end of the first movable spring sheet and the other end of the second movable spring sheet.

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

[0090] 1. In the present disclosure, the armature further includes a metal insert extending integrally with the plastic push arm, which completely covers the metal insert. This structure of the present disclosure utilizes the metal insert to increase the push-pull strength of the plastic push arm of the armature assembly, thereby resolving the problems of the prior art pure plastic swing arm, which is prone to deformation due to heat and water absorption in high-temperature, high-humidity environments, resulting in unstable product adhesion and improving deformation. The present disclosure also solves the problems of the unstable deformation dimensions of pure iron swing arms due to heat treatment and the large variation in thickness between different batches of iron strip material. When dimensions need to be adjusted, the armature assembly of the present disclosure only requires adjusting the injection mold, without the need to adjust the iron component, which is advantageous for dimensional control.

[0091] 2. In this disclosure, the base is divided into two layers, upper and lower, and the armature assembly's plastic push arm with a metal insert 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, with the swing arm (i.e., the plastic push arm) extending downward, and the swing arm and the movable spring located on the same layer. In this configuration of the disclosure, the armature assembly can synchronize the movement of the two push cards, and the push-pull contact points and movement directions can be aligned on the same line.

[0092] 3. In this disclosure, the contact part is designed as a structure with multiple sets of fixed and movable contacts, and each set of fixed and movable contacts is configured with a parallel connection structure of double moving spring assemblies. This structure in this disclosure can increase the strength of the plastic push arm of the armature assembly by using a metal insert, and multiple sets of moving spring seats can bear the reaction force transmitted through the push card, ensuring the stability of the product's adsorption state.

[0093] The present disclosure will be described in further detail below with reference to Figures 22 to 31 and examples, but one of the electromagnetic relays with push cards of the present disclosure is not limited to the examples.

[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 each attached to a predetermined position on the base 1, so that the magnetic circuit portion 7 and the armature assembly 9 can 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 has a plastic plate extending in the direction of the push card. The armature assembly 9 has a plastic push arm 921, a first engagement groove 81 formed in the push card 8, and the plastic push arm 921 of the armature assembly 9 is disposed in the first engagement groove 81 of the push card 8. The armature 91 has a metal insert 60 extending integrally therewith, the plastic push arm 921 completely covering the metal insert 60. 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 easily deformed due to heat or water absorption in a high-temperature and high-humidity environment.

[0095] In this embodiment, the base 1 is divided into two layers, an upper layer and an lower layer, and includes an upper case 11, a surrounding side wall 12, a lower case 13, and a partition plate 14. The upper case 11 and the lower case 13 are fixed to the upper and lower ends of the side wall 12, respectively, and the partition plate 14 is attached within the side wall 12. The upper layer of the base 1 is enclosed by the upper case 11, the side wall 12, and the partition plate 14, and the lower layer of the base 1 is enclosed by the lower case 13, the side wall 12, and the partition plate 14. The magnetic circuit portion 7 and the armature assembly 9 are attached to the upper layer of the base 1, the contact portion 6 is attached to 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 a 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 is made up of 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 is coated on the middle portions of the two armatures 911 and 912 and the magnetic steel 93, the armature assembly 9 forms a U-shaped structure, and the metal insert 60 is provided on the end edge of the length of the armature 911 of one of the two armatures 911 and 912.

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

[0098] In this embodiment, the metal insert 60 includes a first portion 601 that is partly within the width range of the body of the one armature 911, and a second portion 603 that continues to extend beyond the width range of the first portion 601 and is outside the width range of the body of the one armature 911.

[0099] In this embodiment, the plastic member 92 is provided with a rotation shaft 922 that can be installed within the base, thereby allowing the armature assembly 9 to swing around the rotation shaft 922 and the plastic push arm 921 to swing. The magnetic circuit portion 7 includes a coil 210 and a yoke 220, and one end of each of the two yokes 220 of the magnetic circuit portion 7 extends to both side openings of the U-shaped structure of the armature assembly 9. The rotation shaft 922 is offset from the center line of the member consisting of the two armatures 911, 912 and one magnetic steel piece 93.

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

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

[0102] In this embodiment, the two push cards 8 are each provided with three second engagement grooves 82 that align with the contact portions 6, the three second engagement grooves 82 being distributed along the longitudinal direction of the push card 8, and the first engagement groove 8 is provided between a pair of adjacent second engagement grooves 82.

[0103] In this embodiment, the contact portion 6 includes three sets of fixed and movable contact cooperating structures, each set of fixed and movable contact cooperating structures includes a first fixed spring sheet 621, a first fixed contact 622, a first movable spring sheet 623, a first movable contact 624, a second fixed spring sheet 625, a second fixed contact 626, a second movable spring sheet 627 and a second movable contact 628, the first fixed contact 622 is fixed to one end of the first fixed spring sheet 621 and one end of the first movable spring sheet 623, the first movable contact 624 is fixed to the second movable spring sheet 628, the second movable contact 625 is fixed to one end of the first fixed spring sheet 621 and one end of the first movable spring sheet 623, the second movable contact 624 is fixed to the second movable spring sheet 628, the third movable contact 625 is fixed to the first movable spring sheet 623, the fourth movable contact 625 is fixed to the second movable spring sheet 627 and the fourth movable contact 628. 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 engagement grooves 82 of the two push cards 8 correspond to the other end of the first movable spring sheet 621 and the other end of the second movable spring sheet 625. The second fixed contact 626 is fixed to one end of the second fixed spring sheet 625 and one end of the second movable spring sheet 627. The second 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 engagement grooves 82 of the two push cards 8 correspond to the other end of the first movable spring sheet 621 and the other end of the second movable spring sheet 625.

[0104] In the electromagnetic relay with push card of the present disclosure, the armature 911 further includes a metal insert 60 extending integrally with the plastic push arm 921, which completely covers the metal insert 60. This structure of the present disclosure increases the push-pull strength of the plastic push arm 921 of the armature assembly 9 by utilizing the metal insert 60. This structure solves the problem of the prior art pure plastic swing arm being prone to thermal deformation due to water absorption in high-temperature, high-humidity environments, resulting in unstable product adhesion, and improves deformation. The present disclosure also solves the problems of the unstable deformation dimensions of pure iron swing arms during heat treatment and the large variation in thickness between different lots of iron strip material. When dimensions need to be adjusted, the armature assembly of the present disclosure only requires adjusting the injection mold, without the need to adjust the iron member, which is advantageous for dimensional control.

[0105] In the electromagnetic relay with push card of the present disclosure, the base 1 is divided into two layers, an upper layer and an lower layer, 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 to cooperate with the push card 8. The armature assembly 9 employs an eccentric double swing arm structure, with the swing arm (i.e., the plastic push arm) extending downwards, and the swing arm and movable spring located on the same layer. With this configuration of the present disclosure, the armature assembly 9 can synchronize the operation of the two push cards 8, and the push-pull contact points and movement directions can be aligned on the same straight line.

[0106] The electromagnetic relay with push card of the present disclosure has a contact part 6 designed with three sets of fixed and movable contacts cooperating structure, and each set of fixed and movable contacts cooperating structure adopts a parallel connection structure of double moving spring assemblies. This structure of the present disclosure utilizes a metal insert 60 to increase the strength of the plastic push arm 921 of the armature assembly 9, and can withstand the reaction force transmitted by the three sets of movable spring seats through the push card 8, ensuring the stability of the product's suction state.

[0107] It should be understood that the present disclosure is not limited in application to the detailed construction and arrangement of components proposed herein. The present disclosure may have other embodiments and may be realized and carried out in various ways. Such variations and modifications are within the scope of the present disclosure. The present disclosure as disclosed and limited herein should be understood to extend to all alternative combinations of two or more distinct features described or apparent in the text and / or drawings. All these different combinations constitute multiple alternative aspects of the present disclosure. The examples described herein illustrate the best ways known for implementing the present disclosure and enable those skilled in the art to utilize the present disclosure.

Claims

1. A connection structure between a lead piece and a base of an electromagnetic relay, The device includes a base and a drawer piece, a first slot provided on a side wall of the base, a second slot provided in the base, a middle section of the drawer piece inserted into the first slot of the base, an outer section of the drawer piece protruding from the base for electrical connection with an external component, an inner section of the drawer piece located within the base, and a Z-shaped insert piece provided at an end of the inner section of the drawer piece, which is inserted into the second slot of the base and uses the difference in height between the two straight side sections of the Z-shaped insert piece to adjust the position of the drawer piece in the base.

1. A connection structure between a lead piece and a base of an electromagnetic relay.

2. The thickness of the Z-shaped insert is less than the thickness of the main body of the drawer.

2. The connection structure of the lead piece and the base of an electromagnetic relay according to claim 1.

3. The Z-shaped insert piece has a first straight-side section integrally connected to the body of the drawer piece, a second straight-side section having a free end, and an oblique-side section integrally connected between the first straight-side section and the second straight-side section, and an interference fit is formed between the second straight-side section and the second slot of the base.

3. The connection structure of the lead piece and the base of an electromagnetic relay according to claim 2.

4. The second straight edge of the Z-shaped insert is offset from the thickness of the body of the drawer in the thickness direction of the body of the drawer.

4. The connection structure of the lead piece and the base of an electromagnetic relay according to claim 3.

5. A first protrusion protrudes from one slot wall of the second slot of the base toward the outer surface of the second straight side section of the Z-shaped insert piece, and the first protrusion and the second straight side section of the Z-shaped insert piece position the drawer piece in the base.

5. The connection structure of the lead piece and the base of an electromagnetic relay according to claim 4.

6. A second protrusion protrudes from the slot wall of the second slot of the base toward the inner surface of the second straight-side section of the Z-shaped insert piece from another slot wall toward the inner surface of the second straight-side section of the Z-shaped insert piece, and the second protrusion and the second straight-side section of the Z-shaped insert piece realize an interference fit between the drawer piece and the base.

6. The connection structure of the lead piece and the base of an electromagnetic relay according to claim 5.

7. The area where the first protrusion abuts against the outer surface of the second straight side section of the Z-shaped insert piece is larger than the area where the second protrusion abuts against the inner surface of the second straight side section of the Z-shaped insert piece.

7. The connection structure of the lead piece and the base of an electromagnetic relay according to claim 6.

8. The pull-out piece is a fixed spring sheet, and is fixedly connected to the end of the inner section of the pull-out piece and to a fixed contact.

2. The connection structure of the lead piece and the base of an electromagnetic relay according to claim 1.

9. One end of a movable spring sheet is further connected to the end of the inner section of the drawer piece, and a movable contact is fixed to the other end of the movable spring sheet. The two drawer pieces and the movable spring sheets connected to the two drawer pieces respectively constitute a set of fixed and movable contact cooperation structure, where the fixed contact connected to one drawer piece corresponds to the movable contact of the movable spring sheet connected to the other drawer piece, and the fixed contact connected to the other drawer piece corresponds to the movable contact of the movable spring sheet connected to the one drawer piece. Two opposing side walls of the base are respectively provided with first slots to respectively correspond to the middle sections of the two drawer pieces.

9. The connection structure of the lead piece and the base of an electromagnetic relay according to claim 8.

10. The fixed and movable contact cooperating structures are in a plurality of sets, and 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, and the intermediate sections of the two pull-out pieces of the fixed and movable contact cooperating structures of the plurality of sets are respectively disposed in the first slots of the base.

10. The connection structure of the lead piece and the base of an electromagnetic relay according to claim 9.

Images