On-off structure of large-opening-distance relay and magnetic latching relay

Abstract

The invention relates to an on-off structure of a large-open-distance relay and a magnetic latching relay, the on-off structure comprises a push sheet, a conductive sheet assembly and a static sheet assembly, and 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 is elastically connected with the bridging piece through a plurality of elastic pieces, 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 invention relates to the technical field of relays, and in particular to an on-off structure of a large-opening-distance 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, a static 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. 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. 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. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects in the prior art and provide a switching structure of a large-opening distance relay and a magnetic latching relay.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is to design an on-off structure of a large-opening distance relay, including a push piece, a conductive piece assembly, and a static piece assembly, wherein the conductive piece assembly includes a conductive piece and a moving contact arranged on the conductive piece; the static piece assembly includes an electrostatic piece and a static contact arranged on the electrostatic piece, and also includes a movable bridge member, wherein the push piece and the bridge member are elastically connected through a plurality of elastic members, and the bridge member synchronously contacts or separates with the moving contact and the static contact.

[0006] 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.

[0007] A further preferred technical solution is that the bridging member is elastically connected to the push plate via a plurality of first springs, a plurality of first spring rectangular arrays are arranged between the push plate and the bridging member, one end of each of the first springs abuts against the push plate, and the other end of each of the first springs abuts against the bridging member.

[0008] A further preferred technical solution is that the push piece is provided with a plurality of guide rods, the bridge piece is provided with a matching guide hole corresponding to each guide rod, and the bridge piece is slidably mounted on the guide rod of the push piece through the guide hole.

[0009] A further preferred technical solution is that one end of each guide rod is fixed on the push plate, the other end of the guide rod has a circular boss abutting against the end surface of the bridge member, and the bridge member is correspondingly provided with a countersunk hole.

[0010] A further preferred technical solution is that the push piece is a T-shaped push piece, one end of the push piece is a planar end portion cooperating with the bridging piece, the planar end portion is provided with cross-arranged reinforcing ribs, the other end of the push piece is provided with a cylindrical spring seat, and the cylindrical spring seat is provided with a second spring.

[0011] A further preferred technical solution is that a long guide hole penetrating the push piece body is provided in the middle of the push piece near the plane end, and reinforcing ribs are provided on the push piece on both sides of the guide hole; and a push hole penetrating the push piece is provided at one end of the push piece away from the bridging piece.

[0012] 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 the movable armature assembly, and an on-off structure of a large-opening-distance relay is also arranged in the relay base, the on-off structure is connected to the other end of the toggle member.

[0013] A further preferred technical solution is that the electromagnet assembly, the movable armature assembly, and the push piece are placed in parallel in the relay base, the toggle member is arranged on the side of the push piece away from the movable armature assembly, the movable armature assembly is formed by a slot formed by a groove of a protrusion, the protrusion passes through the push piece from one side of the push piece and approaches the toggle member, the toggle member is provided with a first driving arm connected with the slot of the movable armature assembly, and the toggle member is also provided with a second driving arm inserted into the push hole of the push piece and rotatably connected through a hinge rod.

[0014] A further preferred technical solution is that the length of a first lever arm from the first driving arm of the toggle member to the pivot center is smaller than the length of a second lever arm from the second driving arm of the toggle member to the pivot center.

[0015] A further preferred technical solution is that a block is provided on the toggle member, and a micro switch is provided on the relay base. 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.

[0016] The advantages and beneficial effects of the present invention are: 1. The push piece is connected to the bridge member through a plurality of elastic members, so as to realize the contact and separation of the moving contact and the static contact to realize the connection and disconnection of the circuit, thereby enhancing the arc resistance and breaking capacity of the magnetic latching relay, and being able to withstand high-power loads and ultra-high short-time current shocks.

[0017] 2. Since the push piece is connected to the bridge piece through a plurality of elastic parts, the structure of the push piece assembly is more concise, and sufficient space can be provided inside the relay, so that the contact opening distance is increased and the arc is easily broken.

[0018] 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

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a magnetic latching relay proposed by the present invention; Figure 2 A schematic diagram of a three-dimensional structure of a magnetic latching relay proposed by the present invention without a clamping plate; Figure 3 A schematic diagram of the three-dimensional structure of the on-off structure of a large-opening distance relay proposed by the present invention; Figure 4 A schematic diagram of a split three-dimensional structure of the on-off structure of a large-opening distance relay proposed by the present invention; In the figure: 10, electrical base; 20, electromagnet assembly; 30, clamping plate; 40, arc extinguishing chamber; 50, conductive sheet assembly; 51, conductive sheet; 52, moving contact; 60, static sheet assembly; 61, electrostatic sheet; 62, static contact; 63, second magnetic conductive sheet; 70, push sheet; 71, plane end; 72, guide hole; 73, reinforcing rib; 74, push hole; 75, cylindrical spring seat; 76, second spring; 80, toggle member; 81, first drive arm; 82, second drive arm; 90, movable armature assembly; 91, protrusion; 100, bridge member; 101, guide hole; 102, first contact; 103, first magnetic conductive sheet; 104, second contact; 110, guide rod; 111, circular boss; 120, first spring. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention is further described below 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.

[0021] Reference Figure 1-4 A switch structure of a large-opening distance relay includes a push piece 70, a conductive piece assembly 50, and a static piece assembly 60. The conductive piece assembly 50 includes a conductive piece 51 and a moving contact 52 arranged on the conductive piece 51; the static piece assembly 60 includes an electrostatic piece 61 and a static contact 62 arranged on the electrostatic piece 61, and also includes a movable bridge 100. The push piece 70 elastically abuts against the bridge 100. The bridge 100 is provided with a first contact 102 which is connected to the moving contact 52 one by one. Correspondingly, the bridge member 100 is also provided with a second contact 104 which corresponds to the static contact 62 one by one. The push piece 70 reciprocates in a straight line under the action of external force, driving the bridge member 100 to move toward or away from the moving contact 52 and the static contact 62 to make the first contact 102 and the moving contact 52 and the second contact 104 and the static contact 62 contact or separate, and the circuit is connected and disconnected by the contact and separation of the moving contact 52 and the static contact 62.

[0022] In one embodiment, the end faces of the moving contact 52 and the static contact 62 are located in the same plane and on the same side of the bridge member 100. The bridge member 100 is a plate member, and a first contact 102 is provided at one end of the plate member close to the moving contact 52, and a second contact 104 is provided at one end of the plate member close to the static contact 62. Furthermore, a pair of moving contacts 52 are riveted on the conductive sheet 51, and a pair of static contacts 62 are riveted on the electrostatic sheet 61. The corresponding bridge members 100 are arranged in pairs, and the paired bridge members 100 can withstand high-power loads and ultra-high short-time impact currents.

[0023] In order to further improve the ability of the bridge member 100 to withstand high-power loads and ultra-high short-time impact currents, the bridge member 100 is elastically connected to the push piece 70 through a group of first springs 120. A rectangular array of a group of first springs 120 is arranged between the push piece 70 and the bridge member 100. One end of each first spring 120 abuts against the push piece 70, and the other end of each first spring 120 abuts against the bridge member 100. In one embodiment, four first springs 120 are arranged between the push piece 70 and the bridge member 70. One bridge member 100 in a pair of bridge members 100 is connected to two first springs 120. The push piece 70 and the bridge member 100 are correspondingly provided with spring seats. The first springs 120 drive the bridge member 100 to move in a direction close to the moving contact 52 and the static contact 62 so that the first contact 102 and the moving contact 52 and the second contact 104 and the static contact 62 are in contact, thereby realizing the connection and disconnection of the circuit.

[0024] In order to realize that the push piece 70 drives the bridge member 100 to move away from the moving contact 52 and the static contact 62 so as to separate the first contact 102 from the moving contact 52 and the second contact 104 from the static contact 62, and to realize the circuit cutting effect by separating the moving contact 52 from the static contact 62, a group of guide rods 110 are provided on the push piece 70, and the bridge member 100 is provided with a matching guide hole 101 corresponding to each guide rod 110, and the bridge member 100 is slidably mounted on the guide rod 110 of the push piece 70 through the guide hole 101. At the same time, in order to stably enable the bridge member 100 to drive the first contact 102 and the second contact 104 to contact the moving contact 52 and the static contact 62 Disconnection, one end of each guide rod 110 is fixed on the push piece 70, and the other end of the guide rod 110 has a circular boss 111 that can abut against the end face of the bridge member 100. The bridge member 100 is correspondingly provided with a countersunk hole. Under the action of the push piece 70, the circular boss 111 presses the bridge member 100, so that the push piece 70 is rigidly connected to the bridge member 100, driving the first contact 102 and the second contact 104 of the bridge member 100 to disconnect from the moving contact 52 and the static contact 62, which helps to overcome the gravitational force generated by the arc, ensure that the first contact 102 and the second contact 104 are disconnected from the moving contact 52 and the static contact 62, and realize the circuit cutting effect.

[0025] In one embodiment, four guide rods 110 are disposed on the push piece 70 , and the four guide rods 110 are arranged in a circular array on the push piece 70 . Preferably, each guide rod 110 is arranged on a side of a corresponding spring 120 close to an edge.

[0026] In this way, when the push piece 70 moves in the direction close to the conductive sheet 51 and the electrostatic sheet 61, the push piece 70 presses against the spring 120 to drive the bridge member 100 to move in the direction close to the moving contact 52 and the static contact 62 to make the first contact 102 and the moving contact 52 as well as the second contact 104 and the static contact 62 contact, thereby achieving the circuit connection effect; when the push piece 70 moves in the direction away from the conductive sheet 51 and the electrostatic sheet 61, the push piece 70 presses against the countersunk hole of the bridge member 100 through the circular boss 111 on the guide rod 110, driving the bridge member 100 to move in the direction away from the moving contact 52 and the static contact 62, thereby making the first contact 102 and the moving contact 52 as well as the second contact 104 and the static contact 62 separate, thereby achieving the circuit disconnection effect.

[0027] In order to prevent the first contact 102 and the second contact 104 from being affected by the Lorentz magnetic force when power is turned on, a first magnetic conductive sheet 103 is provided on the bridge 100 between the first contact 102 and the second contact 104 .

[0028] Similarly, a second magnetic conductive sheet 63 is provided on the electrostatic sheet 61 between the moving contact 52 and the static contact 62 to prevent the repulsive force generated by the Lorentz magnetic force when power is turned on.

[0029] In one embodiment, the push piece 70 is a T-shaped push piece, one end of the push piece 70 is a plane end portion 71 that cooperates with the bridge piece 100, and the plane end portion 71 is provided with cross-arranged reinforcing ribs 73, and the other end of the push piece 70 is provided with a cylindrical spring seat 75, and the cylindrical spring seat 75 is provided with a second spring 76, and the second spring 76 elastically abuts against the relay base 10 at one end away from the cylindrical spring seat 75, when the first contact 102 and the moving contact 52 and the second contact 104 and the static contact 62 are separated, the second spring 76 stores energy; when the first contact 102 and the moving contact 52 and the second contact 104 and the static contact 62 are in contact, the second spring 76 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 102 and the moving contact 52 and the second contact 104 and the static contact 62 becomes larger, the contact is more stable, and the ability of the load mechanism to resist impact current is enhanced.

[0030] A long guide hole 72 penetrating the body of the push piece 70 is provided in the middle of the push piece 70 near the plane end 71 . The guide hole 72 is arranged along the moving direction of the push piece 70 . Reinforcing ribs 73 are provided on the push piece 70 on both sides of the guide hole 72 .

[0031] A push hole 74 penetrating the push piece 70 is provided at one end of the push piece 70 away from the bridge piece 100 , and the toggle rod 80 of the relay is connected to the push hole 74 . In one embodiment, the guide hole 72 and the push hole 74 are cross-staggered on the push piece 70 .

[0032] A magnetic latching relay comprises a relay base 10 and a relay upper cover which is snap-fitted thereto, wherein the relay base 10 is provided with an electromagnet assembly 20, a movable armature assembly 90, an electrostatic sheet assembly 60, and a conductive sheet assembly 50; a static contact 62 in the electrostatic sheet 60 assembly and a movable contact 52 in the conductive sheet assembly 50 are arranged in parallel on one side of the relay base 10, a toggle member 80 is provided in the relay base 10 on one side of the movable armature assembly 90, the toggle member 80 is pivotally connected to the relay base 10, the toggle member 80 is provided with a first driving arm 81 which is connected to a slot of the movable armature assembly 90, and the toggle member 80 is provided with a second driving arm 82 which is inserted into a push hole 74 of the push sheet 70 and is rotatably connected thereto through a hinge rod.

[0033] In one embodiment, the electromagnet assembly 20, the movable armature assembly 90, and the push piece 70 are placed in parallel in the relay base 10, and the toggle member 80 is arranged on a side away from the movable armature assembly 90. The slot of the movable armature assembly 90 is formed by slotting a protrusion 91. The protrusion 91 passes through the push piece 70 from one side of the push piece 70 and approaches the toggle member 80, so that the first driving arm 81 of the toggle member 80 is inserted into the slot, and the second driving arm 82 of the toggle member 80 is stacked above the first driving arm 82 and inserted into the push hole 74.

[0034] The length of the first force arm from the first driving arm 81 of the toggle member 80 to the pivot center is smaller than the length of the second force arm from the second driving arm 82 of the toggle member 80 to the pivot center. By making the first force arm length of the toggle member 80 smaller than the second force arm length, the translation component of the first force arm along the opening / closing movement direction of the moving / static contact becomes larger, thereby increasing the distance between the moving contact 52 and the static contact 62.

[0035] The push piece 70 reciprocates in a straight line under the action of external force, driving the bridge member 100 to move toward or away from the moving contact 52 and the static contact 62 to make the first contact 102 and the moving contact 52 and the second contact 104 and the static contact 62 contact or separate, and the circuit is connected and disconnected through the contact and separation of the moving contact 52 and the static contact 62.

[0036] A guide rod is further provided on the relay base 10 corresponding to the guide hole 72 of the push piece 70 , and the guide rod is inserted into the guide hole 72 and slidably matched with the guide hole 72 .

[0037] A clamping plate 30 is provided on one side of the relay base 10 close to the relay upper cover, and the guide rod, the toggle member 80 and the movable armature assembly 90 are mounted on the clamping plate 30 .

[0038] The relay base 10 is provided with an anti-magnetic cover to prevent the Lorentz magnetic force generated by the electromagnet assembly when power is supplied.

[0039] Arc extinguishing chambers 40 are respectively provided on the electrostatic sheet assembly 60 and the conductive sheet assembly 50 on one side close to the relay base 10 .

[0040] After the electromagnetic coil of the electromagnet assembly 20 is energized, the magnetic pole changes, attracting / repelling the movable armature assembly 90, causing the movable armature assembly 90 to move, and the driving toggle member 80 of the movable armature assembly 90 rotates around the pivot center, and the toggle member 80 drives the push piece 70 to move linearly, driving the bridge member 100 to move toward or away from the movable contact 52 and the static contact 62 to make the first contact 102 and the movable contact 52 and the second contact 104 and the static contact 62 contact or separate, and the circuit is connected and disconnected by the contact and separation of the movable contact 52 and the static contact 62.

[0041] 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 principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A switch structure of a large-opening distance relay, 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 and the bridge member are elastically connected through a plurality of elastic members, and the bridge member is in synchronous contact or separation with the moving contact and the static contact.

2. The on-off structure of a large-opening distance 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 large-opening distance relay according to claim 1, characterized in that: The bridging member is elastically connected to the push piece via a plurality of first springs, a rectangular array of the plurality of first springs is arranged between the push piece and the bridging member, one end of each of the first springs abuts against the push piece, and the other end of each of the first springs abuts against the bridging member.

4. The on-off structure of a large-opening distance relay according to claim 3, characterized in that: The push piece is provided with a plurality of guide rods, and the bridge piece is provided with a matching guide hole corresponding to each guide rod, and the bridge piece is slidably sleeved on the guide rod of the push piece through the guide hole.

5. The on-off structure of a large-opening distance relay according to claim 4, characterized in that: One end of each guide rod is fixed on the push plate, and the other end of the guide rod has a circular boss abutting against the end surface of the bridge member, and the bridge member is correspondingly provided with a countersunk hole.

6. The on-off structure of a large-opening distance relay according to claim 1, characterized in that: The push piece is a T-shaped push piece, one end of which is a planar end that cooperates with the bridging piece, and the planar end is provided with cross-arranged reinforcing ribs. The other end of the push piece is provided with a cylindrical spring seat, and a second spring is provided on the cylindrical spring seat.

7. The on-off structure of a large-opening distance relay according to claim 6, characterized in that: A long strip guide hole penetrating the push piece body is provided in the middle of the push piece near the plane end, and reinforcing ribs are provided on the push piece on both sides of the guide hole; a push hole penetrating the push piece is provided at one end of the push piece away from the bridging piece.

8. A magnetic latching relay, comprising a relay base and a relay upper cover connected by snapping, wherein the relay base is provided with an electromagnet assembly and a movable armature assembly, and a toggle member is provided in the relay base on one side of the movable armature assembly, the toggle member is pivotally connected in the relay base, and one end of the toggle member is connected to the movable armature assembly, characterized in that: The relay base is also provided with an on-off structure of a large-opening distance relay as described in claims 1-7, and the on-off structure is connected to the other end of the toggle member.

9. A magnetic protection relay according to claim 8, characterized in that: The electromagnet assembly, the movable armature assembly, and the push piece are placed in parallel in the relay base, the toggle member is arranged on the side of the push piece away from the movable armature assembly, the movable armature assembly is formed by a slot formed by a protrusion, the protrusion passes through the push piece from one side of the push piece and approaches the toggle member, the toggle member is provided with a first driving arm connected with the slot of the movable armature assembly, and the toggle member is also provided with a second driving arm inserted into the push hole of the push piece and rotatably connected through a hinge rod.

10. A magnetic protection relay according to claim 9, characterized in that: A first lever arm length from the first driving arm of the toggle member to the pivot center is smaller than a second lever arm length from the second driving arm of the toggle member to the pivot center.

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