Small-size electromagnetic relay

Abstract

The utility model relates to a small volume electromagnetic relay, which comprises a base plate, a shell arranged on the base plate, an electromagnetic assembly and a contact system, the electromagnetic assembly comprises a coil framework, a coil, an iron core and an armature which are arranged on the base plate, the contact system comprises a static contact, a movable terminal and a movable contact spring, and a pushing piece is arranged between the movable contact spring and the armature. One end of the pushing piece is provided with a pushing plate which is separated between the armature and the movable contact spring, the pushing plate is connected to the armature and forms linkage matching of the pushing plate and the armature, a partition plate is arranged at the position, corresponding to the position between the pushing piece and the movable contact spring, in the shell, and the partition plate is provided with an open groove for the pushing piece to penetrate through. And the other end of the pushing piece passes through the open slot and is connected to the movable contact spring. The utility model has the advantages of simple structure, stable and reliable performance, good insulating property, convenient assembly and small volume.

Description

Technical Field

[0001] The utility model specifically relates to an electromagnetic relay, and more specifically to a small-sized electromagnetic relay. Background Art

[0002] An electromagnetic relay is an electronic control device. It has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually applied to an automatic control circuit. It is actually an "automatic switch" that uses a smaller current and a lower voltage to control a larger current and a higher voltage. Therefore, it plays roles such as automatic regulation, safety protection, and circuit conversion in the circuit. With the development of low-voltage electrical appliances, the application of electromagnetic relays is becoming more and more extensive, and the requirements for electromagnetic relays are also getting higher and higher. In the existing electromagnetic relay, the distance between the armature and the moving contact is small, the insulation performance is not ideal, and the electromagnetic relay also has defects such as complex structure, unreliable performance, inconvenient assembly, and large volume. Summary of the Invention

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a small-sized electromagnetic relay with a simple structure, stable and reliable performance, good insulation performance, and convenient assembly.

[0004] To achieve the above purpose, the utility model adopts a small-sized electromagnetic relay, which includes a bottom plate, a housing arranged on the bottom plate, an electromagnetic assembly, and a contact system. The electromagnetic assembly includes a coil bobbin arranged on the bottom plate, a coil arranged on the coil bobbin, an iron core arranged inside the coil bobbin, and an armature rotatably arranged on the bottom plate and cooperating with the iron core. The contact system includes a static contact arranged on the bottom plate, a moving terminal arranged on the bottom plate, and a moving reed arranged on the moving terminal. A pushing member is arranged between the moving reed and the armature. One end of the pushing member has a pushing plate separated between the armature and the moving reed. The pushing plate is connected to the armature and forms a linkage cooperation between the pushing plate and the armature. A partition is arranged in the housing corresponding to the position between the pushing member and the moving reed. An opening slot through which the pushing member can pass is arranged on the partition. The other end of the pushing member passes through the opening slot and is connected to the moving reed.

[0005] The beneficial effects of the above structure are as follows: The pushing plate of the pushing member is separated between the armature and the moving reed, so as to increase the insulation distance between the armature and the moving reed. And the partition of the housing can separate the moving reed and the armature, with better insulation performance. The electromagnetic assembly adopts a modular structure design, with a smaller volume, and is conducive to realizing the modular assembly of the electromagnetic assembly and the bottom plate. And the armature drives the moving reed to act through the pushing member, which can ensure more reliable transmission between the electromagnetic assembly and the moving reed. Thus, the electromagnetic relay has the advantages of simple structure, stable and reliable performance, good insulation performance, convenient assembly, and small volume.

[0006] Specifically, a clamping block is provided on the pushing plate, and a clamping hole matching with the clamping block is provided on the armature. The clamping block is clamped in the clamping hole, forming a clamping fit between the clamping block and the armature. The pushing plate is clamped to the armature through the clamping block, facilitating the assembly of the pushing plate and the armature, and making the assembly more convenient.

[0007] Specifically, arc-shaped convex contact surfaces are respectively provided on both sides of the clamping block on the pushing plate, and the arc-shaped convex contact surfaces are in contact with the armature. The arc-shaped convex contact surfaces of the pushing plate are in contact with the armature, which can ensure more reliable transmission between the armature and the pushing plate.

[0008] Specifically, the other end of the pushing member has a clamping boss matching with the moving reed, and a clamping hole matching with the clamping boss is provided on the moving reed. The clamping boss is clamped in the clamping hole, forming a clamping fit between the clamping boss and the moving reed. The pushing member is clamped in the clamping hole of the moving reed through the clamping boss, facilitating the assembly of the pushing member and the moving reed, and ensuring more reliable transmission between the moving reed and the pushing member.

[0009] Specifically, one end of the moving reed is riveted to the moving terminal, and a strip-shaped opening is provided in the middle of the moving reed. The strip-shaped opening is distributed along the length direction of the moving reed. The strip-shaped opening can reduce the stress concentration of the moving reed, ensure the elasticity of the moving reed, and is beneficial to improving the working reliability of the electromagnetic relay. Description of the Drawings

[0010] Figure 1 It is a perspective view of an embodiment of the present utility model.

[0011] Figure 2 It is a cross-sectional view of an embodiment of the present utility model.

[0012] Figure 3 It is an exploded view of an embodiment of the present utility model. Detailed Embodiment

[0013] As Figures 1 to 3As shown in the figure, an embodiment of the utility model is a small-volume electromagnetic relay, which includes a bottom plate 10, a housing 11 arranged on the bottom plate 10, an electromagnetic component 20, and a contact system 30. The electromagnetic component 20 includes a coil bobbin 21 arranged on the bottom plate 10, a coil 22 arranged on the coil bobbin 21, an iron core 23 arranged inside the coil bobbin 21, and an armature 24 rotatably arranged on the bottom plate 10 and cooperating with the iron core 23. The contact system 30 includes a stationary contact 31 arranged on the bottom plate 10, a moving terminal 32 arranged on the bottom plate 10, and a moving reed 33 arranged on the moving terminal 32. A pushing member 25 is arranged between the moving reed 33 and the armature 24. One end of the pushing member 25 has a pushing plate 251 separated between the armature 24 and the moving reed 33. The pushing plate 251 is connected to the armature 24 and forms a linkage cooperation between the pushing plate 251 and the armature 24. A partition plate 111 is arranged inside the housing 11 corresponding to the position between the pushing member 25 and the moving reed 33. An opening slot 112 through which the pushing member 25 can pass is arranged on the partition plate 111. The other end of the pushing member 25 passes through the opening slot 112 and is connected to the moving reed 33. A clamping block 252 is arranged on the pushing plate 251, and a clamping hole 241 cooperating with the clamping block 252 is arranged on the armature 24. The clamping block 252 is clamped in the clamping hole 241 and forms a clamping cooperation between the clamping block 252 and the armature 24. The pushing plate is clamped with the armature through the clamping block, which is convenient for the assembly of the pushing plate and the armature, and the assembly is more convenient.

[0014] As Figure 2 and 3 shown in the figure, arc-shaped convex contact surfaces 253 are respectively arranged on both sides of the clamping block 252 on the pushing plate 251. The arc-shaped convex contact surfaces 253 are in contact with the armature 24. The arc-shaped convex contact surfaces of the pushing plate are in contact with the armature, which can ensure more reliable transmission between the armature and the pushing plate. The other end of the pushing member 25 has a clamping boss 254 cooperating with the moving reed 33. A clamping hole 331 cooperating with the clamping boss 254 is arranged on the moving reed 33. The clamping boss 254 is clamped in the clamping hole 33, and forms a clamping cooperation between the clamping boss 354 and the moving reed 33. The pushing member is clamped in the clamping hole of the moving reed through the clamping boss, which is convenient for the assembly of the pushing member and the moving reed, and can ensure more reliable transmission between the moving reed and the pushing member. One end of the moving reed 33 is riveted to the moving terminal 32, and a strip-shaped opening 332 is arranged in the middle of the moving reed 33. The strip-shaped opening 332 is distributed along the length direction of the moving reed 33. The strip-shaped opening can reduce the stress concentration of the moving reed, ensure the elasticity of the moving reed, and is beneficial to improving the working reliability of the electromagnetic relay.

[0015] The push plate of the pusher is separated between the armature and the moving reed, thereby increasing the insulation distance between the armature and the moving reed. Moreover, the partition of the housing can separate the moving reed from the armature, with better insulation performance. The electromagnetic component adopts a modular structure design, with a smaller volume, which is conducive to realizing the modular assembly of the electromagnetic component and the base plate. The armature drives the moving reed to act through the pusher, ensuring more reliable transmission between the electromagnetic component and the moving reed. Therefore, this electromagnetic relay has the advantages of simple structure, stable and reliable performance, good insulation performance, convenient assembly, and small volume.

Claims

1. A small-volume electromagnetic relay, comprising a base plate, a housing arranged on the base plate, an electromagnetic assembly, and a contact system, wherein the electromagnetic assembly comprises a coil frame arranged on the base plate, a coil arranged on the coil frame, an iron core arranged in the coil frame, and an armature rotatably arranged on the base plate and matched with the iron core, characterized in that: The contact system includes a static contact arranged on the base plate, a moving terminal arranged on the base plate, and a moving spring arranged on the moving terminal. A pusher is arranged between the moving spring and the armature. One end of the pusher has a pusher plate separated between the armature and the moving spring. The pusher plate is connected to the armature and forms a linkage between the pusher plate and the armature. A partition is arranged in the shell corresponding to the pusher and the moving spring. The partition is provided with a slot for the pusher to pass through. The other end of the pusher passes through the slot and is connected to the moving spring.

2. The small-volume electromagnetic relay according to claim 1, characterized in that: The push plate is provided with a clamping block, the armature is provided with a clamping hole matched with the clamping block, the clamping block is clamped in the clamping hole, and the clamping match between the clamping block and the armature is formed.

3. The small-volume electromagnetic relay according to claim 2, characterized in that: The push plate is provided with arc-surface raised contact surfaces at both sides of the corresponding clamping block, and the arc-surface raised contact surfaces contact the armature.

4. The small-volume electromagnetic relay according to claim 1 or 2, characterized in that: The other end of the pusher has a clamping boss matched with the moving spring piece, and the moving spring piece is provided with a clamping hole matched with the clamping boss. The clamping boss is clamped in the clamping hole to form a clamping fit between the clamping boss and the moving spring piece.

5. The small-volume electromagnetic relay according to claim 1 or 2, characterized in that: One end of the movable spring piece is riveted on the movable terminal, and a strip opening is arranged on the middle part of the movable spring piece, and the strip opening is distributed along the length direction of the movable spring piece.

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