On-off structure of relay and magnetic latching relay

Abstract

The utility model relates to an on-off structure of a relay and a magnetic latching relay, the on-off structure comprises a push sheet, a conductive sheet assembly and a static sheet assembly, the conductive sheet assembly comprises a conductive sheet and a movable contact arranged on the conductive sheet; the static sheet assembly comprises a static sheet and a static contact arranged on the static sheet, the static sheet assembly further comprises a movable bridging piece, the push sheet abuts against the bridging piece, and the bridging piece is synchronously contacted with or separated from the movable contact and the static contact. The magnetic latching relay has the beneficial effects that the contact and the separation of the movable contact and the static contact are realized through the bridging piece to realize the connection and the disconnection of a circuit, so that the arc resistance and the breaking capacity of the magnetic latching relay are enhanced, and the magnetic latching relay can bear high-power load and ultrahigh short-time current impact; the impact current resistance of the relay is improved, the electrical performance is stronger, and the size of the relay product is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to an on-off structure of a relay and a magnetic latching relay. Background Art

[0002] A relay is an electronic control device, mainly used in automatic control circuits. It is actually an automatic switch that uses a smaller current to control a larger current, and automatically connects and disconnects the circuit. Relays used in control circuits need to withstand high-power loads and ultra-high short-term impact currents. The relay load switching mechanism usually connects and disconnects the circuit through the contact and separation of the moving contact and the static contact.

[0003] The existing magnetic latching relay used in electric energy meters is generally composed of an electromagnet assembly, a movable armature assembly, a conductive sheet assembly, an electrostatic sheet assembly, a push sheet, a relay base and a relay cover. When the electromagnetic coil of the electromagnet assembly is excited, the magnetic pole changes, attracting / repelling the movable armature assembly, causing the movable armature assembly to move, and the reciprocating motion of the push sheet drives the conductive sheet assembly to move, thereby realizing the opening / closing of the movable / static contacts.

[0004] The conductive sheet assembly in the original structure adopts the shunt sheet assembly structure, which occupies a large amount of space. The spacing between the moving contact and the static contact of the magnetic latching relay is small, which makes the arc resistance and breaking capacity of the magnetic latching relay weak, and cannot meet the requirements of the existing national power grid.

[0005] When switching between frequent on and off, existing magnetic latching relays are unable to withstand high-power loads and ultra-high short-time current shocks. At the same time, the length of the existing relay load on-off mechanism is relatively long, resulting in a large relay size, which cannot meet the control circuit's requirements for product miniaturization. Utility Model Content

[0006] The purpose of the utility model is to overcome the defects in the prior art and provide a relay on-off structure and a magnetic latching relay.

[0007] To achieve the above-mentioned purpose, the technical solution of the utility model is to design a switching structure of a relay, including a push piece, a conductive piece assembly, and an electrostatic piece assembly, wherein the conductive piece assembly includes a conductive piece and a moving contact arranged on the conductive piece; the electrostatic piece assembly includes an electrostatic piece and a static contact arranged on the electrostatic piece, and also includes a movable bridging piece, wherein the push piece abuts against the bridging piece, and the bridging piece synchronously contacts or separates with the moving contact and the static contact.

[0008] A further preferred technical solution is that the bridge member is provided with a first contact that matches with the moving contact in a one-to-one correspondence, and the bridge member is also provided with a second contact that matches with the static contact in a one-to-one correspondence.

[0009] A further preferred technical solution is that the end faces of the moving contact and the static contact are located in the same plane and on the same side of the bridge member.

[0010] A further preferred technical solution is that a spring sheet is provided between the push sheet and the bridge member, and the spring sheet is connected to the bridge member.

[0011] A further preferred technical solution is that the spring piece and the bridge member are connected by a connecting member, and the spring piece, the connecting member and the bridge member are sequentially stacked together and riveted in the middle by a rivet member.

[0012] A further preferred technical solution is that both ends of the spring sheet are bent toward one side of the push sheet so that the cross section of the spring sheet is an isosceles trapezoidal structure, and the push sheet abuts against both ends of the spring sheet.

[0013] A further preferred technical solution is that both ends of the connecting piece are bent at 90 degrees, both ends of the connecting piece are hollow connecting frames, a connecting plate is provided on the push piece, and both ends of the connecting plate are respectively inserted into the connecting frames of the connecting piece on the corresponding side.

[0014] A further preferred technical solution is that the push piece is provided with a groove arranged along the moving direction of the push piece, a spring seat is provided at one end of the groove close to the bridging member, a spring is provided on the spring seat in the groove, and a stopper is provided on the relay base corresponding to the end of the spring away from the spring seat, and the stopper is inserted into the groove and elastically abuts against the end of the spring.

[0015] A magnetic latching relay comprises a relay base and a relay upper cover which is snap-fitted thereto, wherein an electromagnet assembly and a movable armature assembly are arranged in the relay base, a toggle member is arranged in the relay base on one side of the movable armature assembly, the toggle member is pivotally connected in the relay base, one end of the toggle member is connected to a driving arm of the movable armature assembly, and a relay on-off structure is also arranged in the relay base, the on-off mechanism is connected to the other end of the toggle member.

[0016] A further preferred technical solution is that the toggle member is provided with a toggle head, the relay base is provided with a micro switch, and the moving armature assembly can drive the moving reed of the micro switch to rotate during the process of rotating the switch, thereby forming contact and disconnection with the static reed of the micro switch.

[0017] The advantages and beneficial effects of the utility model are: 1. The contact and separation of the moving contact and the static contact are realized through the bridge piece to realize the connection and disconnection of the circuit, so that the arc resistance and breaking capacity of the magnetic latching relay are enhanced, and it can withstand high-power loads and ultra-high short-time current impacts.

[0018] 2. Since the conductive sheet assembly is composed of a conductive sheet and a moving contact, the shunt sheet assembly in the original structure is removed, making the structure of the conductive sheet assembly more concise, allowing sufficient space inside the relay, increasing the contact opening distance, and facilitating arc breaking.

[0019] 3. The ability of the relay to resist impact current is improved, the electrical performance is stronger, and the volume of the relay product is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the axonometric drawings of the utility model magnetic latching relay;

[0021] Figure 2 It is a partial axonometric drawing of the utility model;

[0022] Figure 3 This is the axonometric drawing of the utility model;

[0023] Figure 4 This is the axonometric view of the anti-magnetic cover of the utility model;

[0024] Figure 5 This is the second axonometric diagram of the magnetic latching relay of the utility model;

[0025] Figure 6 This is an axonometric drawing of the toggle member of the utility model.

[0026] In the figure: 1. relay base; 2. first heat sink; 3. electrostatic sheet assembly; 31. electrostatic sheet; 32. static contact; 4. second heat sink; 5. bridge piece; 51. first contact; 52. second contact; 6. conductive sheet assembly; 61. conductive sheet; 62. moving contact; 7. toggle piece; 71. toggle head; 72. toggle post; 73. slot; 8. micro switch; 9. moving armature assembly; 10. electromagnet assembly; 11. spring; 12. connecting piece; 13. spring; 14. push sheet; 141. groove; 142. push slot; 143. spring seat; 15. connecting plate; 16. anti-magnetic cover; 17. stopper. DETAILED DESCRIPTION

[0027] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0028] Reference Figure 1-6A relay on-off structure includes a push piece 14, a conductive piece assembly 6, and an electrostatic piece assembly 3. The conductive piece assembly 6 includes a conductive piece 61 and a moving contact 62 arranged on the conductive piece 61; the electrostatic piece assembly 3 includes an electrostatic piece 31 and a static contact 32 arranged on the electrostatic piece 31, and also includes a movable bridge 5. The push piece 14 abuts against the bridge 5. The bridge 5 is provided with a first contact 51 that matches the moving contact 62 in a one-to-one correspondence. The bridge 5 is also provided with a second contact 52 that matches the static contact 32 in a one-to-one correspondence. The push piece 14 is in contact with the external force. Under the action, it reciprocates in a straight line, driving the bridge member 5 to move towards or away from the conductive sheet 61 and the electrostatic sheet 31 to make the first contact 51 and the moving contact 62 and the second contact 52 and the static contact 32 contact or separate, and the circuit is connected and disconnected by the contact and separation of the moving contact 62 and the static contact 32. Since the conductive sheet assembly 6 is composed of the conductive sheet 61 and the moving contact 62, the shunt sheet assembly in the original structure is removed, so that the structure of the conductive sheet assembly 6 is simpler, and there is enough space inside the relay, so that the contact opening distance is increased, and the arc is easily disconnected.

[0029] In one embodiment, the end faces of the moving contact 62 and the static contact 32 are located in the same plane and on the same side of the bridge member 5. The bridge member 5 is a plate member. A first contact 51 is provided at one end of the bridge member 5 close to the moving contact 62, and a second contact 52 is provided at one end of the bridge member 5 close to the static contact 32. Furthermore, a pair of moving contacts 62 are riveted on the conductive sheet 61, and a pair of static contacts 32 are riveted on the electrostatic sheet 31. The corresponding bridge members 5 are arranged in pairs, and a pair of bridge members 5 are connected by a connecting member 12. The paired bridge members 5 can withstand high-power loads and ultra-high short-time impact currents.

[0030] In order to further improve the ability of the bridge member 5 to withstand high-power loads and ultra-high short-time impact currents, the bridge member 5 is connected to the push piece 14 through a spring piece 11, and the spring piece 11 is fixedly connected to the bridge member 5. In one embodiment, the spring piece 11 is located on the side of the bridge member 5 close to the push piece 14, and the middle part of the spring piece 11 is connected to the bridge member 5. The two ends of the spring piece 11 are bent toward the side of the push piece 14, so that the cross-section of the spring piece 11 is an isosceles trapezoidal structure, and the push piece 14 abuts against the two ends of the spring piece 11. The bridge member 5 is driven by the spring piece 11 to move in a direction close to the conductive sheet 61 and the electrostatic sheet 31 so that the first contact 51 and the moving contact 62 and the second contact 52 and the static contact 32 are in contact, thereby realizing the connection and disconnection of the circuit.

[0031] The spring piece 11, the connecting piece 12 and the bridge piece 5 are stacked together in sequence, and the middle parts are riveted together by a rivet.

[0032] In order to achieve that the push piece 14 drives the bridge member 5 to move away from the conductive sheet 61 and the electrostatic sheet 31 to separate the first contact 51 and the moving contact 62 and the second contact 52 and the static contact 32, and to achieve the circuit cut-off effect by separating the moving contact 62 and the static contact 32, the connecting member 12 is plate-shaped, and the two ends of the connecting member 12 are bent toward the push piece 14. In one embodiment, the two ends of the connecting member 12 are staggered at 90 degrees with the two ends of the spring sheet 11, and the two ends of the connecting member 12 are bent at 90 degrees. The two ends of 12 are hollow structures, so that the two ends of the connector 12 form a connecting frame, and the push piece 14 is provided with a connecting plate 15, and the connecting plate 15 is plugged into the push piece 14, and the two ends of the connecting plate 15 are respectively inserted into the connecting frame of the connector 12 on the corresponding side. The push piece 14 drives the connecting plate 15 to abut the connector 12, and moves the bridge member 5 in the direction away from the conductive sheet 61 and the electrostatic sheet 31, so that the first contact 51 and the moving contact 62 and the second contact 52 and the static contact 32 are separated, thereby realizing the circuit cutting effect.

[0033] In this way, when the push piece 14 moves in the direction close to the conductive sheet 61 and the electrostatic sheet 31, the push piece 14 presses the spring sheet 11 to drive the bridge member 5 to move in the direction close to the conductive sheet 61 and the electrostatic sheet 31 to make the first contact 51 and the moving contact 62 as well as the second contact 52 and the static contact 32 contact, thereby realizing the connection and disconnection of the circuit; when the push piece 14 moves in the direction away from the conductive sheet 61 and the electrostatic sheet 31, the push piece 14 presses the connecting frame of the connecting member 12 through the connecting plate 15, thereby driving the bridge member 5 to move in the direction away from the conductive sheet 61 and the electrostatic sheet 31, thereby making the first contact 51 and the moving contact 62 as well as the second contact 52 and the static contact 32 separate, thereby realizing the disconnection of the circuit.

[0034] The push piece 14 is provided with a groove 141 arranged along the moving direction of the push piece 14. In one embodiment, the grooves 141 are arranged in pairs, and a spring seat 143 is provided at one end of each groove 141 close to the bridge member. A spring 13 is provided on the spring seat 143 in each groove 141, and a pair of stoppers 17 are provided on the relay base 1 corresponding to the end of the spring 13 away from the spring seat 143. The pair of stoppers 17 are respectively inserted into a corresponding one of the grooves 141 and a corresponding one of the springs 13. The ends of the springs 13 are elastically abutted, and when the first contact 51 and the moving contact 62 and the second contact 52 and the static contact 32 are separated, the spring 13 stores energy; when the first contact 51 and the moving contact 62 and the second contact 52 and the static contact 32 are in contact, the spring 13 releases energy, which can overcome the repulsive force generated by the Lorentz magnetic force when power is turned on, so that the contact pressure between the first contact 51 and the moving contact 62 and the second contact 52 and the static contact 32 becomes larger, the contact is more stable, and the ability of the load mechanism to resist impact current is enhanced.

[0035] An insertion hole that passes through the push piece 14 is provided at one end of the push piece 14 close to the bridge piece 5, and the connecting plate 15 is fixed in the insertion hole. Both ends of the connecting plate 15 extend outward into the connecting frame of the connecting member 12; a push groove 142 is provided at one end of the push piece 14 away from the bridge member 5, and the toggle member 7 of the relay is connected to the push groove 142.

[0036] A magnetic latching relay comprises a relay base 1 and a relay upper cover connected in a snap-fit ​​manner, wherein an electromagnet assembly 10, a moving armature assembly 9, an electrostatic sheet assembly 3, and a conductive sheet assembly 6 are arranged in the relay base 1; a static contact 32 in the electrostatic sheet assembly 3 and a moving contact 62 in the conductive sheet assembly 6 are arranged in parallel on one side of the relay base 1, a toggle member 7 is arranged in the relay base 1 on one side of the moving armature assembly 9, the toggle member 7 is pivotally connected in the relay base 1, one end of the toggle member 7 is connected with a driving arm of the moving armature assembly 9, a slot 73 is provided on the toggle member 7 to cooperate with the driving arm, a toggle head 71 is provided on the other end of the toggle member 7 to connect with the push sheet 14, and a push groove 142 is provided on the push sheet 14 to cooperate with the toggle head 71; a socket is provided at one end of the push sheet 14 close to the static contact 32 and the moving contact 62, and a connecting plate 15 is provided in the socket.

[0037] A movable bridge member 5 is provided at one end of the push piece 14 away from the toggle member 7, a first contact 51 is provided on the bridge member 5, which corresponds to the moving contact 62 in a one-to-one manner, a second contact 52 is also provided on the bridge member 5, which corresponds to the static contact 32 in a one-to-one manner, the bridge member 5 is connected to the push piece 14 through a spring sheet 11, the spring sheet 11 and the bridge member 5 are connected through a connecting member 12, the spring sheet 11, the connecting member 12 and the bridge member 5 are stacked together in sequence, and the middle part is riveted by a rivet.

[0038] The push piece 14 reciprocates in a straight line under the action of external force, driving the bridge member 5 to move toward or away from the conductive sheet 61 and the electrostatic sheet 31 to make the first contact 51 and the moving contact 62 and the second contact 52 and the static contact 32 contact or separate, and the circuit is connected and disconnected through the contact and separation of the moving contact 62 and the static contact 32.

[0039] like Figure 5 As shown, after the electromagnetic coil of the electromagnet assembly 10 is excited, the magnetic pole changes, and it attracts / repulses the movable armature assembly 9, causing the movable armature assembly 9 to move. The driving arm of the movable armature assembly 9 drives the toggle member 7 to rotate around the pivot center, and the toggle member 7 drives the push piece 14 to move linearly, driving the bridge member 5 to move toward or away from the conductive sheet 61 and the electrostatic sheet 31 to make the first contact 51 and the movable contact 62 and the second contact 52 and the static contact 32 contact or separate, and the circuit is connected and disconnected by the contact and separation of the movable contact 62 and the static contact 32.

[0040] Furthermore, a shifting column 72 is provided on the shifting member 7, and a micro switch 8 is provided on the relay base 1. The moving armature assembly 9 can drive the moving reed of the micro switch 8 to rotate during the process of rotating the switch, thereby forming contact and disconnection with the static reed of the micro switch 8.

[0041] Furthermore, since the electrostatic sheet 31 of the electrostatic sheet assembly 3 also generates a large amount of heat, a first heat sink 2 and a second heat sink 4 are provided on the electrostatic sheet 31. The first heat sink 2 and the second heat sink 4 are riveted or bonded to the electrostatic sheet 31 to enhance the heat dissipation effect, and the static contact 32 is riveted to the electrostatic sheet 31.

[0042] An anti-magnetic cover 16 is provided on the periphery between the bridge member 5 and the conductive sheet 61 to prevent the repulsive force generated by the Lorentz magnetic force when power is turned on, thereby increasing the contact pressure between the moving contact 62 and the static contact 32, making the contact more stable and enhancing the load mechanism's ability to resist impact current.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A relay switch structure, comprising a push piece, a conductive piece assembly, and a static piece assembly, wherein the conductive piece assembly comprises a conductive piece and a moving contact arranged on the conductive piece; the static piece assembly comprises an electrostatic piece and a static contact arranged on the electrostatic piece, characterized in that: It also includes a movable bridge member, the push piece abuts against the bridge member, and the bridge member is in synchronous contact or separation with the moving contact and the static contact.

2. A switching structure of a relay according to claim 1, characterized in that: The bridge member is provided with a first contact which is matched with the moving contact in a one-to-one correspondence, and the bridge member is also provided with a second contact which is matched with the static contact in a one-to-one correspondence.

3. The on-off structure of a relay according to claim 1, characterized in that: The end faces of the moving contact and the stationary contact are located in the same plane and on the same side of the bridge member.

4. The on-off structure of a relay according to claim 1, characterized in that: A spring sheet is provided between the push sheet and the bridge member, and the spring sheet is connected to the bridge member.

5. A switching structure of a relay according to claim 4, characterized in that: The spring piece and the bridge piece are connected by a connecting piece, and the spring piece, the connecting piece and the bridge piece are sequentially stacked together, and the middle part is riveted by a rivet piece.

6. A switching structure of a relay according to claim 5, characterized in that: The two ends of the spring sheet are bent toward one side of the push sheet, so that the cross section of the spring sheet is an isosceles trapezoidal structure, and the push sheet abuts against the two ends of the spring sheet.

7. The on-off structure of a relay according to claim 5, characterized in that: The two ends of the connecting piece are bent at 90 degrees, and the two ends of the connecting piece are hollow connecting frames. A connecting plate is provided on the push piece, and the two ends of the connecting plate are respectively inserted into the connecting frame of the connecting piece on the corresponding side.

8. The on-off structure of a relay according to claim 1, characterized in that: The push piece is provided with a groove arranged along the moving direction of the push piece, a spring seat is provided in the groove at one end close to the bridge piece, a spring is provided on the spring seat in the groove, a stopper is provided on the relay base corresponding to the end of the spring away from the spring seat, and the stopper is inserted into the groove and elastically abuts against the end of the spring.

9. A magnetic latching relay, comprising a relay base and a relay cover connected in a snap-fit ​​manner, wherein an electromagnet assembly and a movable armature assembly are arranged in the relay base, a toggle member is arranged in the relay base on one side of the movable armature assembly, the toggle member is pivotally connected in the relay base, one end of the toggle member is connected to a driving arm of the movable armature assembly, and characterized in that: The relay base is also provided with a switching structure of a relay as described in any one of claims 1 to 7, and the switching structure is connected to the other end of the toggle member.

10. A magnetic latching relay according to claim 9, characterized in that: The toggle member is provided with a block, and the relay base is provided with a micro switch. The movable armature assembly can drive the movable reed of the micro switch to rotate during the process of rotating the switch, thereby forming contact and disconnection with the static reed of the micro switch.

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