Normally closed auxiliary contact structure and relay

Abstract

The embodiment of the utility model provides a normally-closed auxiliary contact structure and a relay, and relates to the technical field of relays, the normally-closed auxiliary contact structure comprises a shell, an auxiliary contact piece and an auxiliary contact elastic piece, a first connecting piece and a second connecting piece are arranged on the shell at intervals, a first connecting part is arranged on the first connecting piece, and a second connecting part is arranged on the second connecting piece; the first connecting piece is provided with a first connecting part, the second connecting piece is provided with a second connecting part, the auxiliary contact piece is located in the shell and provided with a third connecting part, the third connecting part is detachably connected with the first connecting part, the auxiliary contact elastic piece is located in the shell and provided with a fourth connecting part, and the fourth connecting part is detachably connected with the second connecting part. Therefore, the auxiliary contact elastic piece is in lap joint with the auxiliary contact piece. According to the normally-closed auxiliary contact structure provided by the embodiment of the invention, the auxiliary contact can be conveniently disassembled or replaced.

Description

TECHNICAL FIELD

[0001] The present application relates to the relay technical field, especially to a normally closed auxiliary contact structure and a relay. BACKGROUND

[0002] The relay is commonly used in the automatic control circuit, uses the smaller current to control the larger current, and can play the roles of automatic adjustment, safety protection and conversion circuit in the circuit. Among them, the high-voltage direct-current relay generally includes a shell, two static contacts, a moving contact and an electromagnetic pushing mechanism. When working, the electromagnetic pushing mechanism pushes the moving contact to move towards the two static contacts, so that the two ends of the moving contact are in contact with the two static contacts and are conducted.

[0003] In order to further monitor the on-off state of the relay, the existing high-voltage direct-current relay further includes an auxiliary contact. The auxiliary contact can be used to monitor the on-off state of the main contact. According to the state of the auxiliary contact, it can be divided into a normally closed auxiliary contact and a normally open auxiliary contact. Among them, the normally closed auxiliary contact refers to the state that the auxiliary contact is in the closed state when the relay is powered off, and the main contact is conducted when the relay is powered on, and the auxiliary contact is switched to the open state. Moreover, the auxiliary contact generally includes an auxiliary static contact spring and an auxiliary moving contact spring, which are respectively welded on two auxiliary terminals of the shell.

[0004] However, the auxiliary static contact spring and the auxiliary moving contact spring on the above-mentioned normally closed auxiliary contact relay are not convenient to disassemble or replace. Invention content

[0005] Therefore, the present application provides a normally closed auxiliary contact structure and a relay to solve the problem that the auxiliary static contact spring and the auxiliary moving contact spring on the existing normally closed auxiliary contact relay are not convenient to disassemble or replace.

[0006] In the first aspect, the present application provides a normally closed auxiliary contact structure, comprising:

[0007] A shell, a first connecting piece and a second connecting piece are arranged on the shell, a first connecting part is arranged on the first connecting piece, and a second connecting part is arranged on the second connecting piece;

[0008] An auxiliary contact piece is arranged in the shell, a third connecting part is arranged on the auxiliary contact piece, and the third connecting part is detachably connected with the first connecting part;

[0009] An auxiliary contact spring is arranged in the shell, a fourth connecting part is arranged on the auxiliary contact spring, and the fourth connecting part is detachably connected with the second connecting part, so that the auxiliary contact spring is lapped on the auxiliary contact piece.

[0010] In a possible implementation, one of the first connecting part and the third connecting part is a first connecting post, and the other is a first connecting hole matched with the first connecting post, and the first connecting post is inserted into the first connecting hole;

[0011] And / or, one of the second connecting part and the fourth connecting part is a second connecting post, and the other is a second connecting hole matched with the second connecting post, and the second connecting post is inserted into the second connecting hole.

[0012] In a possible implementation, a first nut is further provided, which is screwed with the first connecting post, and the first nut and the first connecting post are matched to lock the third connecting part and the first connecting part;

[0013] A second nut is further provided, which is screwed with the second connecting post, and the second nut and the second connecting post are matched to lock the fourth connecting part and the second connecting part.

[0014] In a possible implementation, the auxiliary contact spring is a beryllium copper alloy sheet.

[0015] In a possible implementation, the auxiliary contact spring is elastically pressed on the auxiliary contact piece.

[0016] In a possible implementation, the first connecting piece is provided with a first insertion part, and the shell is provided with a second insertion part, and the first insertion part is inserted into the second insertion part;

[0017] And / or, the second connecting piece is provided with a third insertion part, and the shell is provided with a fourth insertion part, and the third insertion part is inserted into the fourth insertion part.

[0018] In a possible implementation, when the first connecting piece is provided with the first insertion part, and the shell is provided with the second insertion part, the first insertion part is a first plug, the second insertion part is a first insertion hole matched with the first plug, and the first plug is inserted into the first insertion hole;

[0019] When the second connecting piece is provided with the third insertion part, and the shell is provided with the fourth insertion part, the third insertion part is a second plug, the fourth insertion part is a second insertion hole matched with the second plug, and the second plug is inserted into the second insertion hole.

[0020] In a possible implementation, when the first connecting piece is provided with the first insertion part, and the first insertion part is the first plug, the first connecting piece is further provided with a first stop part, and the first stop part abuts against the outer wall of the shell;

[0021] When the second connecting piece is provided with the third insertion part, and the third insertion part is the second plug, the second connecting piece is further provided with a second stop part, and the second stop part abuts against the outer wall of the shell.

[0022] In a possible implementation, when the first connector is provided with the first plug part which is a first plug, the first connector is further provided with a first wiring part which extends out of the shell;

[0023] When the second connector is provided with the third plug part which is a second plug, the second connector is further provided with a second wiring part which extends out of the shell.

[0024] In a possible implementation, the first connector is welded with the shell.

[0025] And / or, the second connector is welded with the shell.

[0026] In a second aspect, the present application further provides a relay, comprising a relay body and any one of the normally closed auxiliary contact structures provided in the first aspect arranged on the relay body.

[0027] In a possible implementation, the relay body comprises:

[0028] a base connected with the shell;

[0029] at least two main terminal posts which are arranged on the shell in a spaced manner;

[0030] a main contact part located in the shell;

[0031] an auxiliary contact support located in the shell, the auxiliary contact support being provided with a protrusion on a side facing the auxiliary contact elastic part;

[0032] a driving mechanism arranged on the base and connected with the main contact part and the auxiliary contact support;

[0033] The driving mechanism is configured to drive the main contact part to move towards the main terminal posts so that the main contact part abuts against the two main terminal posts, and drive the auxiliary contact support to move towards the auxiliary contact elastic part, and push the auxiliary contact elastic part through the protrusion so as to disconnect the auxiliary contact elastic part from the auxiliary contact part.

[0034] In a possible implementation, the protrusion and the auxiliary contact elastic part have a first preset interval, the main contact part and the main terminal post have a second preset interval, and the first preset interval is smaller than the second preset interval.

[0035] The application provides a normally closed auxiliary contact structure and a relay, and the normally closed auxiliary contact structure comprises a shell, an auxiliary contact piece and an auxiliary contact elastic piece. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative labor.

[0037] Figure 1 A schematic view of the relay from the top view is provided in the embodiments of the present application.

[0038] Figure 2 A schematic view of the relay from the top view is provided in the embodiments of the present application. Figure 1 A sectional view of A-A in the embodiments of the present application.

[0039] Figure 3 A schematic view of the relay from the top view is provided in the embodiments of the present application. Figure 1 A schematic view of the relay from the top view is provided in the embodiments of the present application.

[0040] Figure 4 A schematic view of the relay from the top view is provided in the embodiments of the present application. Figure 3 A schematic view of the relay from the top view is provided in the embodiments of the present application.

[0041] Figure 5 A schematic view of the relay from the top view is provided in the embodiments of the present application. Figure 2 A schematic view of the relay from the top view is provided in the embodiments of the present application.

[0042] Reference signs:

[0043] 100: shell; 110: first connecting piece; 111: first connecting part; 112: first nut; 113: first plug-in part; 114: first stop part; 115: first wiring part; 120: second connecting piece; 121: second connecting part; 122: second nut; 123: third plug-in part; 124: second stop part; 125: second wiring part;

[0044] 200: auxiliary contact piece; 210: third connecting part;

[0045] 300: auxiliary contact spring; 310: fourth connecting portion;

[0046] 400: base;

[0047] 500: main terminal post;

[0048] 600: main contact piece;

[0049] 700: auxiliary contact support; 710: protrusion;

[0050] 800: driving mechanism; 810: coil; 820: moving iron core; 830: stationary iron core; 840: push rod; 850: insulating block; 860: support assembly. DETAILED DESCRIPTION

[0051] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The description of the exemplary embodiments is intended to apply to various alternative forms of the exemplary embodiments. The exemplary embodiments described herein are not intended to be exhaustive or to be limited to the forms disclosed. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the exemplary embodiments. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0052] The terms "first", "second", "third", "fourth", and the like in the description and in the claims, where they occur, are used as labels for nouns that they precede, and do not necessarily describe a relationship with, or order of, such terms to other words or objects. It will be understood that the use of such terms is merely used to distinguish one from another. Furthermore, the terms "comprise", "comprising", "include", "including", and the like, are used herein to be able to specify the presence of stated features, integers, steps, operations, elements, and / or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The indefinite articles "a" and "an" are used herein to mean "one or more" unless explicitly indicated to the contrary.

[0053] As mentioned in the background section, the auxiliary static contact spring and the auxiliary moving contact spring are generally welded or riveted on the auxiliary terminal post. In this way, on the one hand, it is inconvenient to disassemble or replace, and on the other hand, it is inconvenient to adjust the position and height. In addition, the mechanical auxiliary contact in the above form generally uses iron as the moving material, the material deformation is small, the service life is poor, and metal fatigue is easy to cause monitoring failure. Moreover, the material has poor resilience, and the movement mode of the iron sheet being lifted up by the push rod driven by the main contact movement will have the problems of monitoring asynchrony, slow iron sheet resilience, and poor synchronicity, thereby causing the relay main contact energized state to be not timely reacted. Especially for vehicles used for a long time, the above auxiliary contact structure using iron sheet will have a large wear, resulting in the monitoring value deviating from the actual value.

[0054] In view of the above problems existing in the prior art, the application provides a normally closed auxiliary contact structure and a relay. The normally closed auxiliary contact structure provided by the application comprises a shell, an auxiliary contact piece and an auxiliary contact elastic piece. The first connecting piece and the second connecting piece are arranged on the shell in a spaced manner, the first connecting part is arranged on the first connecting piece, and the second connecting part is arranged on the second connecting piece. The auxiliary contact piece is arranged in the shell, and a third connecting part is arranged on the auxiliary contact piece. The third connecting part is detachably connected with the first connecting part. The auxiliary contact elastic piece is arranged in the shell, and a fourth connecting part is arranged on the auxiliary contact elastic piece. The fourth connecting part is detachably connected with the second connecting part. The auxiliary contact elastic piece is lapped on the auxiliary contact piece, so that the disassembly or replacement of the auxiliary contact is facilitated.

[0055] The technical solutions of the application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0056] In the first aspect, referring to Figures 1-5 The application provides a normally closed auxiliary contact structure, which comprises a shell 100, an auxiliary contact piece 200 and an auxiliary contact elastic piece 300.

[0057] The first connecting piece 110 and the second connecting piece 120 are arranged on the shell 100 in a spaced manner. The first connecting part 111 is arranged on the first connecting piece 110, and the second connecting part 121 is arranged on the second connecting piece 120.

[0058] The auxiliary contact piece 200 is located in the shell 100, and a third connecting part 210 is arranged on the auxiliary contact piece 200. The third connecting part 210 is detachably connected with the first connecting part 111.

[0059] The auxiliary contact spring 300 is located in the shell 100, and a fourth connecting part 310 is arranged on the auxiliary contact spring 300, and the fourth connecting part 310 is detachably connected with the second connecting part 121, so that the auxiliary contact spring 300 is overlapped on the auxiliary contact part 200.

[0060] The shell 100 in the embodiment can be used as a mounting base and can play a protective role, and the shell 100 can be made of a ceramic material and is substantially cuboid-shaped, and the shell 100 is open at a lower end. The first connecting part 110 and the second connecting part 120 are arranged at intervals on the shell 100, and on one hand, the first connecting part 110 and the second connecting part 120 are used for fixing the auxiliary contact part 200 and the auxiliary contact spring 300, and on the other hand, the first connecting part 110 and the second connecting part 120 can be used as terminal posts and are electrically connected with the auxiliary contact part 200 and the auxiliary contact spring 300.

[0061] The first connecting part 110 and the second connecting part 120 can be a column, a strip, a bracket or the like, and a part of the first connecting part 110 and a part of the second connecting part 120 are located in the shell 100. Moreover, an end of the first connecting part 110 located in the shell 100 has a first connecting part 111 for fixedly connecting the auxiliary contact part 200. An end of the second connecting part 120 located in the shell 100 has a second connecting part 121 for fixedly connecting the auxiliary contact spring 300.

[0062] The auxiliary contact part 200 in the embodiment is an auxiliary static contact spring, and is located in the shell 100. The auxiliary contact part 200 can be in a sheet shape, a plate shape or the like, and the auxiliary contact part 200 is provided with a third connecting part 210 for connecting with the first connecting part 111.

[0063] The auxiliary contact spring 300 in the embodiment is an auxiliary dynamic contact spring, and is located in the shell 100. The auxiliary contact spring 300 can be in a sheet shape, a plate shape or the like, and has a certain elastic deformation capacity. The auxiliary contact spring 300 is provided with a fourth connecting part 310 for connecting with the second connecting part 121.

[0064] Specifically, the third connecting part 210 is detachably connected with the first connecting part 111, such as plug-in connection, screw connection, clamping connection or the like, and the fourth connecting part 310 is detachably connected with the second connecting part 121, such as plug-in connection, screw connection, clamping connection or the like, and the auxiliary contact spring 300 is overlapped on the auxiliary contact part 200, and a normally closed state is maintained.

[0065] Compared with the welding and riveting between the auxiliary static contact spring and the auxiliary dynamic contact spring and the auxiliary terminal post in the prior art, the application of the normally closed auxiliary contact structure in the embodiment can facilitate the disassembly and replacement of the auxiliary contact, and the assembly process is simple and the cost is low.

[0066] It should be noted that a pushing mechanism for opening the auxiliary contact elastic element 300 and the auxiliary contact element 200 may also be provided inside the housing 100.

[0067] Therefore, the normally closed auxiliary contact structure provided in this application embodiment includes a housing 100, an auxiliary contact member 200, and an auxiliary contact elastic member 300. By providing a first connecting member 110 and a second connecting member 120 at intervals on the housing 100, and providing a first connecting portion 111 on the first connecting member 110 and a second connecting portion 121 on the second connecting member 120, by providing the auxiliary contact member 200 inside the housing 100 and providing a third connecting portion 210 thereon, and providing a detachable connection between the third connecting portion 210 and the first connecting portion 111, and by providing the auxiliary contact elastic member 300 inside the housing 100 and providing a fourth connecting portion 310 thereon, and providing a detachable connection between the fourth connecting portion 310 and the second connecting portion 121, the auxiliary contact elastic member 300 overlaps the auxiliary contact member 200, which facilitates the disassembly, assembly, or replacement of the auxiliary contact.

[0068] In one possible design, one of the first connecting part 111 and the third connecting part 210 is a first connecting post, and the other is a first connecting hole that matches the first connecting post, with the first connecting post being inserted into the first connecting hole.

[0069] And / or, one of the second connecting part 121 and the fourth connecting part 310 is a second connecting post, and the other is a second connecting hole that matches the second connecting post, and the second connecting post is inserted into the second connecting hole.

[0070] In one example, such as Figure 4 As shown, the first connecting part 111 is a first connecting post, and the third connecting part 210 is a first connecting hole. The first connecting hole matches the first connecting post, and the first connecting post and the first connecting hole are tightly fitted together, thus facilitating disassembly or replacement. In another example, not shown in the figure, the first connecting part 111 is a first connecting hole, and the third connecting part 210 is a first connecting post. The first connecting hole matches the first connecting post, and the first connecting post and the first connecting hole are also tightly fitted together, thus facilitating disassembly or replacement.

[0071] Similarly, such as Figure 4 As shown, the second connecting part 121 is a second connecting post, and the fourth connecting part 310 is a second connecting hole. The second connecting hole matches the second connecting post, and the second connecting post and the second connecting hole are tightly fitted together, thus facilitating disassembly or replacement. In another example, not shown in the figure, the second connecting part 121 is a second connecting hole, and the fourth connecting part 310 is a second connecting post. The second connecting hole matches the second connecting post, and the second connecting post and the second connecting hole are also tightly fitted together, thus facilitating disassembly or replacement.

[0072] Furthermore, in this embodiment, a first nut 112 is threadedly connected to the first connecting post, and the first nut 112 cooperates with the first connecting post to lock the third connecting part 210 and the first connecting part 111.

[0073] It also includes a second nut 122 that is threadedly connected to the second connecting post. The second nut 122 cooperates with the second connecting post to lock the fourth connecting part 310 and the second connecting part 121.

[0074] Specifically, continue as Figure 4 As shown, the first connecting part 111 is a first connecting post, which is a first stud. Its outer diameter is smaller than that of the first connecting member 110. The first nut 112 is connected to the first stud by a threaded engagement. At this time, when the first connecting post is inserted into the first connecting hole, one side of the auxiliary contact member 200 abuts against the end of the first connecting member 110, and the other side abuts against the first nut 112, thereby locking the auxiliary contact member 200 and preventing loosening.

[0075] Similarly, continue as follows Figure 4 As shown, the second connecting part 121 is a second connecting post, which is a second stud. Its outer diameter is smaller than that of the second connecting member 120. The second nut 122 is connected to the second stud by a threaded engagement. At this time, when the second connecting post is inserted into the second connecting hole, one side of the auxiliary contact elastic member 300 abuts against the end of the second connecting member 120, and the other side abuts against the second nut 122, thereby locking the auxiliary contact elastic member 300 and preventing loosening.

[0076] It should be noted that a shim can be added between the first connector 110 and the auxiliary contact 200 to adjust the height of the auxiliary contact 200, or a shim can be added between the second connector 120 and the auxiliary contact elastic member 300 to adjust the height of the auxiliary contact elastic member 300.

[0077] In some embodiments, the auxiliary contact elastic element 300 is a beryllium copper alloy sheet.

[0078] Specifically, the auxiliary contact elastic element 300 is a one-piece sheet structure made of beryllium copper alloy, i.e., a beryllium copper alloy sheet. This material possesses excellent mechanical and physical properties, including high strength, high conductivity, high toughness, high fatigue limit, high wear resistance, seawater corrosion resistance, non-magnetic properties, thermal shock resistance, and no sparking upon impact. This allows it to quickly return to its original shape after significant deformation, making it suitable for scenarios with small deformation amounts and frequent deformation cycles. Furthermore, it can withstand repeated friction and contact with excellent fatigue resistance, can withstand alternating current for extended periods, and can quickly recover its original shape after the relay malfunctions or is lifted, reducing the false alarm rate of external monitoring.

[0079] Of course, the auxiliary contact element 200 can also be a beryllium copper alloy sheet, with a thickness greater than that of the auxiliary contact elastic element 300, to ensure the mechanical and physical properties of the auxiliary contact element 200. In addition, a raised contact point can be provided on the side of the auxiliary contact elastic element 300 facing the auxiliary contact element 200. This can be determined according to actual needs, and no excessive restrictions are imposed in this embodiment.

[0080] Furthermore, in this embodiment, the auxiliary contact elastic element 300 is elastically pressed onto the auxiliary contact element 200.

[0081] That is, in the normally closed state, the auxiliary contact elastic element 300 forms a pre-tightening force on the auxiliary contact element 200, elastically pressing it. The first connecting part 111 and the second connecting part 121 can be arranged on the same plane to minimize the possibility of the auxiliary contact elastic element 300 failing to return to its original position after prolonged use.

[0082] In some embodiments, the first connector 110 is provided with a first plug-in portion 113, and the housing 100 is provided with a second plug-in portion, wherein the first plug-in portion 113 is plugged into the second plug-in portion.

[0083] And / or, the second connector 120 is provided with a third insertion part 123, and the housing 100 is provided with a fourth insertion part, and the third insertion part 123 is inserted into the fourth insertion part.

[0084] In this way, the first connector 110 and the housing 100 can be quickly installed by the insertion and fixing between the first connector 113 and the second connector.

[0085] Similarly, by inserting and fixing the third connector 123 and the fourth connector, the second connector 120 and the housing 100 can be quickly installed.

[0086] Specifically, in this embodiment, when the first connector 110 is provided with a first plug-in portion 113 and the housing 100 is provided with a second plug-in portion, the first plug-in portion 113 is a first plug and the second plug-in portion is a first socket that matches the first plug, and the first plug is plugged into the first socket.

[0087] When the second connector 120 is provided with a third plug-in portion 123 and the housing 100 is provided with a fourth plug-in portion, the third plug-in portion 123 is a second plug and the fourth plug-in portion is a second socket that matches the second plug, and the second plug is plugged into the second socket.

[0088] In one example, such as Figure 2 , Figure 4As shown, the first plug may be a part of the first connector 110. The first plug is away from the first connector 111. The housing 100 is provided with a first socket through it. The first socket matches the first plug, so that the first plug and the first socket can be connected by tight fit to achieve quick installation.

[0089] In another example, continue as Figure 2 , Figure 4 As shown, the second plug can be a part of the second connector 120. The second plug is opposite to the second connector 121. The housing 100 is provided with a second socket through it. The second socket matches the second plug, so that the second plug and the second socket can be connected by tight fit to achieve quick installation.

[0090] Furthermore, in this embodiment, when the first connector 110 is provided with a first plug portion 113 and the first plug portion 113 is a first plug, the first connector 110 is also provided with a first stop portion 114, and the first stop portion 114 abuts against the outer wall of the housing 100.

[0091] When the second connector 120 is provided with a third plug portion 123, and the third plug portion 123 is a second plug, the second connector 120 is also provided with a second stop portion 124, and the second stop portion 124 abuts against the outer wall of the housing 100.

[0092] In one example, the first stop 114 can be a flange, a stop block, or the like, which is adjacent to the first insertion part 113. In this way, when the first insertion part 113 is inserted into place, the first stop 114 abuts against the outer wall of the housing 100, which can serve a positioning function, allowing for one-step installation without adjustment, and can also enhance the stability of the first connector 110 during installation.

[0093] In another example, the second stop 124 can be a flange, a stop block, etc., which is adjacent to the third insertion part 123. In this way, when the third insertion part 123 is inserted into place, the second stop 124 abuts against the outer wall of the housing 100, which can play a positioning role, allowing for one-step installation without adjustment, and can also enhance the stability of the second connector 120 installation.

[0094] Furthermore, in this embodiment, when the first connector 110 is provided with a first plug portion 113 and the first plug portion 113 is a first plug, the first connector 110 is also provided with a first wiring portion 115, which extends to the outside of the housing 100.

[0095] When the second connector 120 is provided with a third plug portion 123, and the third plug portion 123 is a second plug, the second connector 120 is also provided with a second wiring portion 125, which extends to the outside of the housing 100.

[0096] The first wiring portion 115 is used to connect to the controller. It can be an auxiliary terminal or wiring terminal, which facilitates wiring outside the housing 100. The first wiring portion 115 is adjacent to the first stop portion 114. Similarly, the second wiring portion 125 is used to connect to the controller. It can be an auxiliary terminal or wiring terminal, which facilitates wiring outside the housing 100. The second wiring portion 125 is adjacent to the second stop portion 124.

[0097] Furthermore, in this embodiment, the first connector 110 is welded to the housing 100.

[0098] And / or, the second connector 120 is welded to the housing 100.

[0099] Specifically, when the first connector 110 is provided with a first plug portion 113, and the first plug portion 113 is a first plug, the first plug and the housing 100 can be connected by brazing, such as welding at the intersection of the first stop portion 114 and the housing 100 on the same side. This ensures the airtightness between the two while reducing the processing difficulty. Similarly, when the second connector 120 is provided with a third plug portion 123, and the third plug portion 123 is a second plug, the second plug and the housing 100 can also be connected by brazing.

[0100] Secondly, embodiments of this application also provide a relay, including a relay body and a normally closed auxiliary contact structure provided in any of the above embodiments disposed on the relay body.

[0101] The structure of the normally closed auxiliary contact has been described in detail in the above embodiments, and will not be repeated here.

[0102] The relay provided in this application embodiment, by configuring a normally closed auxiliary contact structure, includes a housing 100, an auxiliary contact member 200, and an auxiliary contact elastic member 300. A first connecting member 110 and a second connecting member 120 are spaced apart on the housing 100, with a first connecting portion 111 on the first connecting member 110 and a second connecting portion 121 on the second connecting member 120. The auxiliary contact member 200 is disposed within the housing 100, with a third connecting portion 210 disposed thereon, and the third connecting portion 210 is detachably connected to the first connecting portion 111. The auxiliary contact elastic member 300 is disposed within the housing 100, with a fourth connecting portion 310 disposed thereon, and the fourth connecting portion 310 is detachably connected to the second connecting portion 121. This allows the auxiliary contact elastic member 300 to overlap the auxiliary contact member 200, facilitating the disassembly, assembly, or replacement of the auxiliary contact.

[0103] In some embodiments, the relay body includes a base 400, at least two main terminals 500, a main contact member 600, an auxiliary contact bracket 700, and a drive mechanism 800.

[0104] The base 400 is connected to the housing 100.

[0105] Two main terminals 500 are spaced apart on the housing 100.

[0106] The main contact element 600 is located inside the housing 100.

[0107] The auxiliary contact support 700 is located inside the housing 100 and has a protrusion 710 on the side facing the auxiliary contact elastic member 300.

[0108] The drive mechanism 800 is mounted on the base 400 and is connected to both the main contact component 600 and the auxiliary contact bracket 700.

[0109] The drive mechanism 800 is configured to drive the main contact 600 to move toward the main terminal 500 so that the main contact 600 abuts against the two main terminals 500, and at the same time drive the auxiliary contact bracket 700 to move toward the auxiliary contact elastic member 300, and push the auxiliary contact elastic member 300 with the protrusion 710 to disconnect the auxiliary contact elastic member 300 from the auxiliary contact 200.

[0110] Specifically, the base 400 serves as the mounting foundation and can be a shell-like structure with an internal mounting cavity. The shell 100 can be connected to the base 400 by welding, screwing, snap-fitting, or other methods. The main terminals 500 are used to connect two high-voltage terminals, and the two main terminals 500 can be spaced apart on the shell 100. The main contact element 600, also known as the moving contact plate, is used to abut against the two main terminals 500 to establish conductivity; it is located inside the shell 100. The auxiliary contact bracket 700 is used to push the auxiliary contact elastic element 300. It can be made of insulating material, such as plastic or ceramic. The auxiliary contact bracket 700 is located inside the shell 100 and also has a protrusion 710 facing the auxiliary contact elastic element 300.

[0111] The driving mechanism 800 is used to simultaneously drive the main contact 600 and the auxiliary contact bracket 700 to move. It includes a coil 810, a moving iron core 820, a stationary iron core 830, a push rod 840, an insulating block 850, and a bracket assembly 860. The coil 810 is mounted on the base 400. The moving iron core 820 and the stationary iron core 830 are mounted in the coil 810. One end of the moving iron core 820 is connected to the push rod 840. The other end of the push rod 840 passes through the stationary iron core 830 and is connected to the insulating block 850. The insulating block 850 is connected to the bracket assembly 860. The main contact 600 and the auxiliary contact bracket 700 are mounted on the bracket assembly 860, and the auxiliary contact bracket 700 is located between the main contact 600 and the auxiliary contact 200 or the auxiliary contact elastic member 300.

[0112] In this way, such as Figure 2 As shown, after voltage is applied to coil 810, the magnetic effect of the current generates a magnetic field inside the coil, magnetizing the moving iron core 820 and the stationary iron core 830. The top of the moving iron core 820 and the bottom of the stationary iron core 830 are attracted to each other by the magnetic field, causing the moving iron core 820 to move upwards. The moving iron core 820 then pushes the insulating block 850 and the support assembly 860 upwards via the push rod 840, causing the main contact component 600 and the auxiliary contact support 700 to move upwards. During this movement, as... Figure 5 As shown, the auxiliary contact bracket 700 lifts the auxiliary contact elastic element 300, causing the auxiliary contact element 200 to disconnect from the auxiliary contact elastic element 300, and the main contact element 600 abuts against the two main terminals 500 respectively to conduct the high voltage circuit.

[0113] Furthermore, in this embodiment, there is a first preset distance L1 between the protrusion 710 and the auxiliary contact elastic member 300, and a second preset distance L2 between the main contact member 600 and the main terminal 500. The first preset distance L1 is smaller than the second preset distance L2.

[0114] In other words, when the drive mechanism 800 drives the main contact 600 and the auxiliary contact bracket 700 to move upward, the auxiliary contact bracket 700 first pushes open the auxiliary contact elastic element 300, and then causes the main contact 600 to abut against the main terminal 500. When the drive mechanism 800 is not working, the main contact 600 is first disconnected from the main terminal 500, and then the auxiliary contact elastic element 300 and the auxiliary contact 200 are connected to form a conductive circuit.

[0115] This improves the accuracy of relay status monitoring and reduces the possibility of false alarms. The specific sizes of the first preset distance L1 and the second preset distance L2 can be determined according to actual needs; this embodiment does not impose specific limitations.

[0116] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0117] It should be understood that this application is not limited to the precise structures described above and shown in the appendix, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A normally closed auxiliary contact structure, characterized in that, include: A housing (100) is provided with a first connector (110) and a second connector (120) spaced apart thereon. The first connector (110) is provided with a first connecting portion (111), and the second connector (120) is provided with a second connecting portion (121). An auxiliary contact element (200) is located inside the housing (100). The auxiliary contact element (200) is provided with a third connecting part (210), which is detachably connected to the first connecting part (111). An auxiliary contact elastic element (300) is located inside the housing (100). The auxiliary contact elastic element (300) is provided with a fourth connecting part (310). The fourth connecting part (310) is detachably connected to the second connecting part (121) so that the auxiliary contact elastic element (300) overlaps the auxiliary contact element (200).

2. The normally closed auxiliary contact structure according to claim 1, characterized in that, One of the first connecting part (111) and the third connecting part (210) is a first connecting post, and the other is a first connecting hole that matches the first connecting post. The first connecting post is inserted into the first connecting hole. And / or, one of the second connecting part (121) and the fourth connecting part (310) is a second connecting post, and the other is a second connecting hole that matches the second connecting post, and the second connecting post is inserted into the second connecting hole.

3. The normally closed auxiliary contact structure according to claim 2, characterized in that, It also includes a first nut (112) that is threadedly connected to the first connecting post, the first nut (112) cooperating with the first connecting post to lock the third connecting part (210) and the first connecting part (111); It also includes a second nut (122) that is threadedly connected to the second connecting post, the second nut (122) cooperating with the second connecting post to lock the fourth connecting part (310) and the second connecting part (121).

4. The normally closed auxiliary contact structure according to claim 1, characterized in that, The auxiliary contact elastic element (300) is a beryllium copper alloy sheet.

5. The normally closed auxiliary contact structure according to claim 4, characterized in that, The auxiliary contact elastic element (300) is elastically pressed against the auxiliary contact element (200).

6. The normally closed auxiliary contact structure according to any one of claims 1 to 5, characterized in that, The first connector (110) is provided with a first plug-in portion (113), and the housing (100) is provided with a second plug-in portion, wherein the first plug-in portion (113) is plugged into the second plug-in portion; And / or, the second connector (120) is provided with a third plug-in portion (123), and the housing (100) is provided with a fourth plug-in portion, wherein the third plug-in portion (123) is plugged into the fourth plug-in portion.

7. The normally closed auxiliary contact structure according to claim 6, characterized in that, When the first connector (110) is provided with the first plug-in part (113) and the housing (100) is provided with the second plug-in part, the first plug-in part (113) is a first plug and the second plug-in part is a first socket that matches the first plug, and the first plug is plugged into the first socket. When the second connector (120) is provided with the third plug-in portion (123) and the housing (100) is provided with the fourth plug-in portion, the third plug-in portion (123) is a second plug and the fourth plug-in portion is a second socket that matches the second plug, and the second plug is plugged into the second socket.

8. The normally closed auxiliary contact structure according to claim 7, characterized in that, When the first connector (110) is provided with the first plug-in portion (113) and the first plug-in portion (113) is the first plug, the first connector (110) is also provided with the first stop portion (114), and the first stop portion (114) abuts against the outer wall of the housing (100); When the second connector (120) is provided with the third plug (123) and the third plug (123) is the second plug, the second connector (120) is also provided with a second stop (124), and the second stop (124) abuts against the outer wall of the housing (100).

9. The normally closed auxiliary contact structure according to claim 7, characterized in that, When the first connector (110) is provided with the first plug-in portion (113), and the first plug-in portion (113) is the first plug, the first connector (110) is also provided with the first wiring portion (115), and the first wiring portion (115) extends to the outside of the housing (100); When the second connector (120) is provided with the third plug portion (123), and the third plug portion (123) is the second plug, the second connector (120) is also provided with a second wiring portion (125), and the second wiring portion (125) extends to the outside of the housing (100).

10. The normally closed auxiliary contact structure according to claim 7, characterized in that, The first connector (110) is welded to the housing (100); And / or, the second connector (120) is welded to the housing (100).

11. A relay, characterized in that, It includes a relay body and a normally closed auxiliary contact structure as described in any one of claims 1 to 10 disposed on the relay body.

12. The relay according to claim 11, characterized in that, The relay body includes: A base (400) is connected to the housing (100); At least two main terminals (500) are provided on the housing (100) at intervals; The main contact element (600) is located within the housing (100); An auxiliary contact bracket (700) is located inside the housing (100), and the auxiliary contact bracket (700) has a protrusion (710) on the side facing the auxiliary contact elastic member (300). A drive mechanism (800) is disposed on the base (400) and is connected to both the main contact member (600) and the auxiliary contact support (700); The drive mechanism (800) is configured to drive the main contact member (600) to move toward the main terminal (500) so that the main contact member (600) abuts against the two main terminals (500), and at the same time drive the auxiliary contact support (700) to move toward the auxiliary contact elastic member (300), and push the auxiliary contact elastic member (300) with the protrusion (710) to disconnect the auxiliary contact elastic member (300) from the auxiliary contact member (200).

13. The relay according to claim 12, characterized in that, The protrusion (710) and the auxiliary contact elastic element (300) have a first preset distance, and the main contact element (600) and the main terminal (500) have a second preset distance, wherein the first preset distance is smaller than the second preset distance.

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