Relay anti-repulsion contact assembly

Abstract

A relay anti-repulsive contact assembly includes a static contact unit and a moving contact unit; the static contact unit includes an adjacent portion and a static contact fixed on a side of the adjacent portion; the moving contact unit includes a short spring, a mounting portion connected to one end of the short spring, and a moving contact arranged at the end of the mounting portion; the first end of the mounting portion facing the second terminal is located on the side of the adjacent portion away from the static contact, the second end is bent to the side of the adjacent portion with the static contact, and the moving contact is arranged on the side of the second end of the mounting portion facing the static contact. When the moving contact is connected to the static contact, the current direction i1 in the short spring is opposite to the current direction i2 in the adjacent portion, thereby generating a mutual repulsive force f between the adjacent portion and the short spring, thereby making the moving contact more tightly pressed against the static contact, and at the same time having the advantages of simple structure, low processing cost, and long service life.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to a relay anti-repulsion contact assembly. Background Art

[0002] When the moving contact of the electromagnetic relay contacts the static contact, a large short-circuit current will be generated. The short-circuit current forms a repulsive force, which acts on the moving contact and the static contact, so that a mutually repulsive force is generated between the moving contact and the static contact. In order to increase the contact force to offset the repulsive force, the existing relay usually sets the moving spring and the moving contact terminal at least partially in parallel, and the fixed end of the moving spring is connected to one end of the moving contact terminal. When the power is turned on, the electromagnetic component drives the lever to move, and the lever drives the free end of the moving spring to move toward the static contact. After the moving contact on the moving spring is in contact with the static contact, currents in opposite directions are generated in the moving contact terminal and the moving spring, and the corresponding electromagnetic force drives the moving spring to move away from the moving contact terminal, thereby offsetting the repulsive force. In addition, in order to increase the anti-repulsive force, a reinforcing plate is also required to be set on the back of the moving spring, and the middle part of the reinforcing plate has an arc-shaped protrusion to increase the elastic force.

[0003] However, this contact assembly has the following problems:

[0004] 1. The structure is complex. The structure of the moving spring and the reinforcing plate is relatively complex, the processing is difficult and the processing cost is high.

[0005] 2. Since the dynamic spring and the reinforcing sheet have a fixed end and a free end, and are relatively long, they are easily deformed after long-term use, especially during installation and disassembly, they are easily deformed by external forces, which reduces the elastic force and further reduces the repulsion force, resulting in a shorter service life. Summary of the invention

[0006] In view of this, the present invention provides a relay anti-repulsion contact assembly with simple structure, low processing cost and long service life to solve the above problems.

[0007] A relay anti-repulsion contact assembly comprises a static contact unit and a moving contact unit arranged adjacent to each other; the static contact unit comprises a first terminal, an adjacent portion connected to the first terminal, and a static contact fixed on a side surface of the adjacent portion; the moving contact unit comprises a second terminal, a short spring connected to the second terminal, a mounting portion connected to an end of the short spring away from the second terminal, and a moving contact arranged at the end of the mounting portion; the first end of the mounting portion facing the second terminal is located on a side of the adjacent portion away from the static contact, the second end is bent to a side of the adjacent portion having the static contact, and the moving contact is arranged on a side of the second end of the mounting portion facing the static contact.

[0008] Furthermore, the mounting portion includes a connecting block connected to the short spring sheet, a transition block connected at an angle to one end of the connecting block away from the short spring sheet, and a mounting block connected at an angle to one end of the transition block away from the connecting block; the moving contact is arranged on the side of the mounting block facing the connecting block, and the end of the adjacent portion and the static contact are both located between the mounting block and the connecting block.

[0009] Furthermore, the length of the connecting block is greater than the length of the mounting block.

[0010] Furthermore, the transition block is vertically connected to the connection block, and the installation block is vertically connected to the transition block.

[0011] Furthermore, the first wiring terminal and the second wiring terminal are on the same horizontal plane.

[0012] Furthermore, a first bending portion is provided on one end of the first terminal extending downward toward the adjacent portion, and the adjacent portion is L-shaped, with a first end connected to the first bending portion and a second end located between the mounting block and the connecting block.

[0013] Furthermore, the second terminal is provided with a second bent portion extending downward toward one end of the short spring piece; the first end of the short spring piece is connected to the second bent portion via a plurality of first rivets, and the second end is connected to the mounting portion via a plurality of second rivets.

[0014] Compared with the prior art, the relay repulsive contact assembly of the present invention includes a static contact unit and a moving contact unit arranged adjacent to each other; the static contact unit includes a first terminal, an adjacent portion connected to the first terminal, and a static contact fixed on a side of the adjacent portion; the moving contact unit includes a second terminal, a short spring connected to the second terminal, a mounting portion connected to an end of the short spring away from the second terminal, and a moving contact arranged at the end of the mounting portion; the first end of the mounting portion facing the second terminal is located on the side of the adjacent portion away from the static contact, the second end is bent to the side of the adjacent portion with the static contact, and the moving contact is arranged on the side of the second end of the mounting portion facing the static contact. When the moving contact is connected to the static contact, the current direction i1 in the short spring is opposite to the current direction i2 in the adjacent portion, thereby generating a repulsive force f that moves away from each other between the adjacent portion and the short spring, thereby making the moving contact more tightly pressed against the static contact, so that the structure is simple, the processing cost is low, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The embodiments of the present invention are described below in conjunction with the accompanying drawings, wherein:

[0016] Figure 1 A three-dimensional schematic diagram of the relay anti-repulsion contact assembly provided by the present invention.

[0017] Figure 2 A schematic diagram of the disassembly of the relay anti-repulsion contact assembly provided by the present invention. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are further described in detail below based on the accompanying drawings. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0019] Please refer to Figure 1 and Figure 2 The relay anti-repulsion contact assembly provided by the present invention includes a static contact unit 10 and a moving contact unit 20 which are adjacently arranged.

[0020] The stationary contact unit 10 includes a first terminal 11 , an adjacent portion 12 connected to the first terminal 11 , and a stationary contact point 13 fixed on one side of the adjacent portion 12 .

[0021] The moving contact unit 20 includes a second terminal 21 , a short spring piece 22 connected to the second terminal 21 , a mounting portion 23 connected to an end of the short spring piece 22 away from the second terminal 21 , and a moving contact point 24 disposed at the end of the mounting portion 23 .

[0022] The first end of the mounting portion 23 is located on a side of the adjacent portion 12 away from the static contact 13 , and the second end is bent to a side of the adjacent portion 12 having the static contact 13 . The moving contact 24 is disposed on a side of the second end of the mounting portion 23 facing the static contact 13 .

[0023] The mounting portion 23 may be a single-layer metal sheet or a multi-layer metal sheet, such as a copper sheet.

[0024] The mounting portion 23 is in a J-shape, and includes a connecting block 231 connected to the short spring piece 22, a transition block 232 connected at an angle to one end of the connecting block 231 away from the short spring piece 22, and a mounting block 233 connected at an angle to one end of the transition block 232 away from the connecting block 231. The length of the connecting block 231 is greater than the length of the mounting block 233. The moving contact 24 is arranged on the side of the mounting block 233 facing the connecting block 231. The end of the adjacent portion 12 and the static contact 13 are both located between the mounting block 233 and the connecting block 231. In the initial state, there is a first gap between the static contact 13 and the moving contact 24.

[0025] In this embodiment, the transition block 232 is vertically connected to the connection block 231 , and the installation block 233 is vertically connected to the transition block 232 .

[0026] Furthermore, the first terminal 11 and the second terminal 21 are on the same horizontal plane; the first terminal 11 is provided with a first bent portion 111 extending downwardly from one end thereof toward the adjacent portion 12. The adjacent portion 12 is L-shaped, with a first end connected to the first bent portion 111 and a second end located between the mounting block 233 and the connecting block 231.

[0027] The second terminal 21 extends downward toward one end of the short spring 22 to form a second bent portion 211 ; the first end of the short spring 22 is connected to the second bent portion 211 via a plurality of first rivets, and the second end is connected to the mounting portion 23 via a plurality of second rivets.

[0028] The side of the mounting block 233 away from the connecting block 231 abuts against a sliding block. The sliding of the sliding block is driven by an electromagnetic component, thereby driving the mounting portion 23 and the moving contact 24 to move closer to or farther from the static contact 13 .

[0029] When the moving contact 24 is connected to the static contact 13, the current direction i1 in the connecting block 231 and the short spring piece 22 is opposite to the current direction i2 in the mounting block 233 and the adjacent portion 12, thereby generating a repulsive force f between the adjacent portion 12 and the connecting block 231 or the short spring piece 22, thereby making the moving contact 24 more tightly pressed against the static contact 13. Figure 1 shown.

[0030] Since the length of the short spring piece 22 is designed to be short, its elastic force can be guaranteed. At the same time, since the left and right movement of the mounting portion 23 is limited by the adjacent portion 12, the deformation degree of the short spring piece 22 is controlled, and the elastic force of the short spring piece 22 will not decrease significantly after long-term use.

[0031] Compared with the prior art, the relay repulsion contact assembly of the present invention comprises a static contact unit 10 and a moving contact unit 20 arranged adjacent to each other; the static contact unit 10 comprises a first terminal 11, an adjacent portion 12 connected to the first terminal 11, and a static contact 13 fixed on one side of the adjacent portion 12; the moving contact unit 20 comprises a second terminal 21, a short spring piece 22 connected to the second terminal 21, a mounting portion 23 connected to one end of the short spring piece 22 away from the second terminal 21, and a moving contact 24 arranged at the end of the mounting portion 23; the first end of the mounting portion 23 facing the second terminal 21 is located on the side of the adjacent portion 12 away from the static contact 13, the second end is bent to the side of the adjacent portion 12 with the static contact 13, and the moving contact 24 is arranged on the side of the second end of the mounting portion 23 facing the static contact 13. Such a structure is simple, the processing cost is low, and the service life is long.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A relay anti-repulsion contact assembly, characterized in that: It comprises a static contact unit and a moving contact unit arranged adjacently; the static contact unit comprises a first terminal, an adjacent portion connected to the first terminal, and a static contact point fixed on a side surface of the adjacent portion; the moving contact unit comprises a second terminal, a short spring connected to the second terminal, a mounting portion connected to an end of the short spring away from the second terminal, and a moving contact point arranged at the end of the mounting portion; The first end of the mounting portion facing the second terminal is located on the side of the adjacent portion away from the static contact, and the second end is bent to the side of the adjacent portion with the static contact. The moving contact is arranged on the side of the second end of the mounting portion facing the static contact.

2. The relay anti-repulsion contact assembly according to claim 1, characterized in that: The mounting portion includes a connecting block connected to the short spring sheet, a transition block connected at an angle to one end of the connecting block away from the short spring sheet, and a mounting block connected at an angle to one end of the transition block away from the connecting block; the moving contact is arranged on the side of the mounting block facing the connecting block, and the end of the adjacent portion and the static contact are both located between the mounting block and the connecting block.

3. The relay anti-repulsion contact assembly according to claim 2, characterized in that: The length of the connecting block is greater than the length of the mounting block.

4. The relay anti-repulsion contact assembly according to claim 2, characterized in that: The transition block is vertically connected to the connection block, and the installation block is vertically connected to the transition block.

5. The relay anti-repulsion contact assembly according to claim 2, characterized in that: The first wiring terminal and the second wiring terminal are on the same horizontal plane.

6. The relay anti-repulsion contact assembly according to claim 5, characterized in that: The first terminal is provided with a first bending portion extending downwardly from one end of the adjacent portion. The adjacent portion is L-shaped, with a first end connected to the first bending portion and a second end located between the mounting block and the connecting block.

7. The relay anti-repulsion contact assembly according to claim 5, characterized in that: The second terminal is extended downward toward one end of the short spring piece and is provided with a second bending portion; the first end of the short spring piece is connected to the second bending portion by a plurality of first rivets, and the second end is connected to the mounting portion by a plurality of second rivets.

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