Electromagnetic relay

Abstract

The utility model discloses an electromagnetic relay, comprising a pedestal which is provided with a first shaft pin seat; the first shaft pin seat is in shaft pin connection with a seesaw, one end of the seesaw abuts against a movable contact piece arranged on the base, and a bottom shaft pin of the movable contact piece is installed on a second shaft pin seat arranged on the base; a static contact piece is also arranged on the base; and after the electromagnetic coil arranged on the base is electrified, the rocker is adsorbed to rotate on the first shaft pin seat, so that the other end of the rocker drives the contact on the movable contact piece to be in contact with the contact on the static contact piece, and the conduction of a circuit is completed. The movable contact piece can rotate on the second shaft pin seat, so that the movable contact piece does not need to have elasticity in material, the thickness of the movable contact piece can be increased, the movable contact piece does not generate heat and deform when large current passes through, and the relay can allow the large current to pass through under the condition of the same size. On the basis, the device is worthy of popularization and application.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an electromagnetic relay. Background Art

[0002] For example, in the patent with application number: CN201511027236.5, a small electromagnetic relay is disclosed, including a magnetic circuit system, a contact system, a push block, a cover, and a base. The magnetic circuit system includes an electromagnetic system and an armature, the electromagnetic system includes an iron core and a yoke, the contact system includes a static contact group and a moving contact group, the base includes a magnetic circuit system mounting part and a contact system mounting part of the relay, a first isolation wall is arranged between the electromagnetic system and the contact system, a first push block slide groove for installing the push block is arranged on the first isolation wall, and the characteristic is that the push block includes a main body, a first flange part and a second flange part arranged at both ends of the main body, a first boss for connecting to the armature is arranged on the outer end surface of the first flange part, and a second boss for connecting to the moving contact group is arranged on the outer end surface of the second flange part; the advantages are that the relay is simple and quick to assemble, easy to realize automated production, low manufacturing cost, small size and good insulation performance, wide application range and more reliable operation. However, the contact group mainly relies on the elasticity of the dynamic contact group itself to achieve separation from the close contact group. Therefore, there are high requirements for the thickness of the bottom of the dynamic contact group. If the thickness is thin, it may be deformed due to excessive current during use, resulting in its inability to separate normally from the static contact group. Utility Model Content

[0003] The purpose of the utility model is to provide an electromagnetic relay to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electromagnetic relay, comprising a base, on which a first axle pin seat is provided; the first axle pin seat is connected to a seesaw axle pin provided, and one end of the seesaw abuts against a moving contact piece provided on the base; the bottom axle pin of the moving contact piece is installed on a second axle pin seat provided on the base, and the base is also provided with a stationary contact piece; when the electromagnetic coil provided on the base is energized, the seesaw is caused to rotate on the first axle pin seat, so that the other end of the seesaw causes the contact point on the moving contact piece to contact the contact point on the stationary contact piece, thereby completing the conduction of the circuit.

[0005] As a preferred technical solution of the utility model: a contact plate is provided at one end of the seesaw, and a cylindrical contact portion is also provided at the other end of the seesaw.

[0006] As a preferred technical solution of the utility model: an axle pin hole is also provided in the middle of the seesaw, and the seesaw is assembled to the first axle pin seat after an axle pin rod is passed through the first axle pin seat and the axle pin hole.

[0007] As a preferred technical solution of the utility model: a torsion spring is further provided inside the second shaft pin seat, and the torsion spring causes the moving contact piece to separate from the stationary contact piece after the external force disappears.

[0008] As a preferred technical solution of the utility model: the base is also provided with a socket, and the static contact piece is adaptively connected to the socket through a provided plug.

[0009] As a preferred technical solution of the utility model: both the moving contact piece and the stationary contact piece are provided with mounting holes.

[0010] By adopting the above technical scheme, the beneficial effect of the utility model is: since the moving contact piece can rotate on the second shaft pin seat, the moving contact piece does not need to be elastic in material, and the thickness of the moving contact piece can be increased, so that when a large current passes through, the moving contact piece will not heat up and deform, so that the relay can allow a large current to pass under the condition of the same volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an exploded schematic diagram of the main structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the exploded structure of the base of the utility model;

[0013] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0014] Figure 4 It is a schematic diagram of the main structure of the seesaw of the utility model.

[0015] In the figure: 1, base; 2, first axle pin seat; 3, moving contact piece; 4, stationary contact piece; 5, rocker; 50, contact plate; 51, axle pin hole; 52, contact part; 6, plug; 7, axle pin rod; 8, socket; 9, electromagnetic coil; 10, torsion spring; 11, second axle pin seat; 12, mounting hole. DETAILED DESCRIPTION

[0016] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present utility model, and should not be construed as limitations on the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0017] See also Figure 1-4 The utility model provides an embodiment: an electromagnetic relay, comprising a base 1, on which a first shaft pin seat 2 is provided; the first shaft pin seat 2 is connected to a seesaw 5 shaft pin, and one end of the seesaw 5 is in conflict with a moving contact piece 3 provided on the base 1; the bottom shaft pin of the moving contact piece 3 is installed on a second shaft pin seat 11 provided on the base 1, and the base 1 is also provided with a static contact piece 4; when the electromagnetic coil 9 provided on the base 1 is energized, the seesaw 5 is caused to rotate on the first shaft pin seat 2, so that the other end of the seesaw 5 causes the contact point on the moving contact piece 3 to contact the contact point on the static contact piece 4, completing the conduction of the circuit.

[0018] In summary, since the movable contact piece 3 can rotate on the second shaft pin seat 11, the movable contact piece 3 does not need to be elastic in material, and the thickness of the movable contact piece 3 can be increased, so that when a large current passes through, the movable contact piece 3 will not heat up and deform, so that the relay can allow a large current to pass through under the same volume. In addition, when the thickness of the movable contact piece 3 is increased, the heat generation can be reduced.

[0019] Furthermore, since a contact plate 50 is provided at one end of the seesaw 5, the contact plate 50 is used to contact the armature of the electromagnetic coil 9. At the same time, the contact plate 50 is in the shape of a disc, so the contact area with the armature can be expanded. At the same time, a cylindrical contact portion 52 is also provided at the other end of the seesaw 5, so that the seesaw 5 can smoothly and steadily cause the moving contact piece 3 to rotate on the second shaft pin seat 11. The specific contact portion 52 is also set to be cylindrical.

[0020] Furthermore, the middle of the seesaw 5 is provided with an axle pin hole 51, and the seesaw 5 is assembled to the first axle pin seat 2 after the axle pin rod 7 passes through the first axle pin seat 2 and the axle pin hole 51. Therefore, the assembly of the seesaw 5 is simple and convenient, and the installation and replacement of the seesaw 5 are also convenient.

[0021] On the basis of the above solution, since the second shaft pin seat 11 is further provided with a torsion spring 10, the torsion spring 10 is used to urge the movable contact piece 3 to separate from the stationary contact piece 4 after the external force disappears. Therefore, the movable contact piece 3 can be smoothly separated from the stationary contact piece 4 without any elastic force, thereby effectively solving the problem of deformation of the contact piece due to heat and difficulty in separation after deformation in the prior art.

[0022] Furthermore, since the base 1 is provided with a socket 8, and the stationary contact piece 4 is adapted and connected to the socket 8 via the provided plug 6, the installation of the stationary contact piece 4 is simple and convenient, and the replacement and maintenance are also simple and convenient.

[0023] In addition, since the movable contact piece 3 and the stationary contact piece 4 are both provided with mounting holes 12, bolts can be used to connect with the mounting holes 12 to fix the wires on the pins on the corresponding contacts.

[0024] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. An electromagnetic relay, characterized in that: It comprises a base (1), wherein a first shaft pin seat (2) is provided on the base (1); The first axle pin seat (2) is connected to the axle pin of the seesaw (5), and one end of the seesaw (5) is in contact with the moving contact piece (3) provided on the base (1); The bottom shaft pin of the moving contact piece (3) is mounted on a second shaft pin seat (11) provided on the base (1), and a stationary contact piece (4) is also provided on the base (1); When the electromagnetic coil (9) provided on the base (1) is energized, the seesaw (5) is caused to rotate on the first shaft pin seat (2), so that the other end of the seesaw (5) causes the contact point on the moving contact piece (3) to contact the contact point on the stationary contact piece (4), thereby completing the conduction of the circuit.

2. An electromagnetic relay according to claim 1, characterized in that: A contact plate (50) is provided at one end of the seesaw (5), and a cylindrical contact portion (52) is also provided at the other end of the seesaw (5).

3. An electromagnetic relay according to claim 2, characterized in that: The middle of the seesaw (5) is also provided with an axle pin hole (51), and the seesaw (5) is assembled onto the first axle pin seat (2) after the axle pin rod (7) passes through the first axle pin seat (2) and the axle pin hole (51).

4. An electromagnetic relay according to claim 1, 2 or 3, characterized in that: A torsion spring (10) is also provided inside the second shaft pin seat (11), and the torsion spring (10) causes the moving contact piece (3) to separate from the stationary contact piece (4) after the external force disappears.

5. An electromagnetic relay according to claim 4, characterized in that: The base (1) is also provided with a socket (8), and the static contact piece (4) is adaptively connected to the socket (8) via a plug (6).

6. An electromagnetic relay according to claim 5, characterized in that: The movable contact piece (3) and the stationary contact piece (4) are both provided with mounting holes (12).

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