CN112151311A - Relay - Google Patents

Abstract

The invention discloses a relay, which comprises a main body, a rotating assembly, a first movable contact piece, a first static contact piece and a first electromagnetic driving assembly, wherein the rotating assembly is rotatably arranged on the main body, one end of the first movable contact piece is in transmission connection with the rotating assembly, the other end of the first movable contact piece is connected with the main body, the first static contact piece is arranged on the main body, the first electromagnetic driving assembly is arranged on the main body and is linked with the rotating assembly, the first electromagnetic driving assembly can drive the rotating assembly to rotate relative to the main body when being electrified so as to drive the first movable contact piece to move towards the direction close to or far away from the first static contact piece, and further to enable the first movable contact piece to be in contact with or separated from the first static contact piece, when the first movable contact piece is in contact with the first static contact piece, the relay is in an electrified state, and when the first movable contact piece is separated from the first static contact. The relay can control the power-on condition of the relay according to the power-on condition of the first electromagnetic driving assembly, and power consumption is reduced.

Description

Relay

Technical Field

The invention relates to the technical field of electromagnetism, in particular to a relay.

Background

A relay is an electronic control device, and is generally applied to an automatic control circuit. The relay is actually an 'automatic switch' which uses a small current to control a large current, and plays the roles of automatic adjustment, safety protection, circuit conversion and the like in a circuit. In the prior art, the electromagnet always adsorbs the movable contact piece to be contacted with the static contact piece, so that the relay is in a power-on state for a long time, but the power consumption is increased when the electromagnet is powered on for a long time.

Disclosure of Invention

Therefore, a relay is needed to be provided, and the technical problem that the power consumption is increased because the electromagnet is always electrified when the relay in the prior art is in an electrified state for a long time is solved.

The invention discloses a relay, comprising:

a main body;

the rotating assembly is rotatably arranged on the main body;

one end of the first movable contact piece is in transmission connection with the rotating assembly, and the other end of the first movable contact piece is connected with the main body;

the first static contact piece is arranged on the main body; and

the first electromagnetic driving component is arranged on the main body and linked with the rotating component, the first electromagnetic driving component can drive the rotating component to rotate relative to the main body when being electrified so as to drive the first movable contact piece to move towards the direction close to or away from the first static contact piece, and further to enable the first movable contact piece to be in contact with or separated from the first static contact piece, when the first movable contact piece is in contact with the first static contact piece, the relay is in an electrified state, and when the first movable contact piece is separated from the first static contact piece, the relay is in a power-off state.

Further, the first electromagnetic driving assembly comprises a first coil and a first magnetic core, the first coil is arranged on the main body, the first magnetic core is arranged in the first coil in a penetrating mode, and when the first coil is electrified, a magnetic field can be generated to drive the first magnetic core to move towards the direction close to the rotating assembly, so that the first magnetic core is abutted against and drives the rotating assembly to rotate relative to the main body, the first movable contact piece is driven to move towards the direction close to or far away from the first static contact piece, and the first movable contact piece is further contacted with or separated from the first static contact piece.

Further, the relay comprises a first elastic piece, and the first elastic piece is elastically abutted against the first magnetic core.

Furthermore, the rotating assembly comprises a rotating part and a first operating part, the rotating part is rotatably arranged on the main body and is in transmission connection with the first movable contact piece, and the first electromagnetic driving assembly is linked with the first operating part so as to drive the first movable contact piece to move towards the direction close to or far away from the first static contact piece.

Further, the relay comprises a second electromagnetic driving assembly, the second electromagnetic driving assembly is arranged on the main body and is linked with the rotating assembly, and the second electromagnetic driving assembly can drive the rotating assembly to rotate relative to the main body when being electrified so as to drive the first movable contact piece to move towards the direction close to or away from the first static contact piece, and further to enable the first movable contact piece to be in contact with or separated from the first static contact piece.

Further, the second electromagnetic driving assembly comprises a second coil and a second magnetic core, the second coil is arranged on the main body, the second magnetic core is arranged in the second coil in a penetrating mode, a magnetic field can be generated when the second coil is electrified so as to drive the second magnetic core to move towards the direction close to the rotating assembly, the second magnetic core is abutted against and drives the rotating assembly to rotate relative to the main body, the first movable contact piece is driven to move towards the direction close to or far away from the first static contact piece, and the first movable contact piece is further contacted with or separated from the first static contact piece.

Further, the first movable contact piece is made of elastic materials, the first movable contact piece is provided with a protruding portion, the rotating assembly is provided with a curved surface combined with the protruding portion, the rotating assembly rotates relative to the main body to enable the protruding portion to slide along the curved surface, the curved surface can drive the first movable contact piece to move towards a direction close to or far away from the first static contact piece, the first movable contact piece is further enabled to be in contact with or separated from the first static contact piece under the action of self elastic force, and the curved surface can simultaneously keep the protruding portion to keep the position of the protruding portion at that time without changing.

Further, the relay comprises a second elastic piece, one end of the second elastic piece is connected to the rotating assembly, the other end of the second elastic piece is connected to the first movable contact piece, the rotating assembly rotates relative to the main body to drive the first movable contact piece to move towards the direction close to the first fixed contact piece, so that the first movable contact piece is in contact with the first fixed contact piece and is far away from the first fixed contact piece under the elastic acting force of the second elastic piece, and the second elastic piece is used for providing the elastic acting force towards the first movable contact piece and keeping the position of the first movable contact piece unchanged.

Furthermore, the relay further comprises a wiring terminal, one end of the wiring terminal is fixedly connected with the first movable contact piece, the other end of the wiring terminal is arranged outside the main body and is connected with an external electric appliance, and the first static contact piece is arranged outside the main body and is connected with the external electric appliance at one end far away from the first movable contact piece.

The relay further comprises a support frame, a second static contact piece and a second movable contact piece, wherein the support frame is connected with the main body and can swing relative to the main body, and the second movable contact piece can move towards the direction close to or far away from the second static contact piece under the driving of the rotating assembly so as to contact or separate the second movable contact piece with or from the second static contact piece;

the support frame is connected with the second elastic piece, the first movable contact piece and the second movable contact piece respectively, and the support frame is made of insulating materials so as to insulate the first movable contact piece and the second movable contact piece.

The invention discloses a relay, wherein a rotating component is rotationally arranged on a main body, one end of a first movable contact piece is in transmission connection with the rotating component, the other end of the first movable contact piece is connected with the main body, a first static contact piece is arranged on the main body, a first electromagnetic driving component is arranged on the main body, when the first electromagnetic driving component is electrified, the rotating component can be driven to rotate relative to the main body so as to drive the first movable contact piece to move towards the direction close to or away from the first static contact piece, and further to enable the first movable contact piece to be in contact with or separated from the first static contact piece, when the first movable contact piece is in contact with the first static contact piece, the relay is in an electrified state, and when the first movable contact piece is separated from the first static contact. Compared with the prior art that the relay is in a power-on state for a long time and the power consumption is increased by always adsorbing the movable contact piece and the static contact piece through the electromagnet, the relay protected by the invention can control the power-on state of the relay according to the power-on state of the first electromagnetic driving assembly, and the power consumption is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is an exploded view of a relay in embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1 in accordance with the present invention;

fig. 3 is a schematic structural diagram of a relay in embodiment 1 of the present invention;

FIG. 4 is an enlarged view taken at C of FIG. 3 in accordance with the present invention;

fig. 5 is a schematic structural view of a first elastic member and a first magnetic core in embodiment 1 of the present invention;

fig. 6 is a schematic structural diagram of a relay in embodiment 2 of the present invention;

FIG. 7 is a cross-sectional view taken at B-B of FIG. 6 in accordance with the present invention;

fig. 8 is another schematic structural diagram of a relay according to embodiment 2 of the present invention;

fig. 9 is a schematic structural diagram of a relay according to embodiment 3 of the present invention;

fig. 10 is another schematic structural diagram of a relay according to embodiment 3 of the present invention.

The main components are as follows:

100. a main body; 200. a rotating assembly; 210. a first operating member; 220. a second operating member; 230. a rotating member; 240. a curved surface; 310. a first movable contact piece; 311. a boss portion; 320. a second movable contact piece; 410. a first static contact; 420. a second static contact; 500. a first electromagnetic drive assembly; 510. a first coil; 520. a second coil; 600. a second electromagnetic drive assembly; 610. a first magnetic core; 620. a second magnetic core; 710. a first elastic member; 720. a second elastic member; 730. a third elastic member; 810. a first coil bobbin; 820: a second coil bobbin; 910. a support frame; 920. and a terminal.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, "and/or" in the whole text includes three schemes, taking a and/or B as an example, including a technical scheme, and a technical scheme that a and B meet simultaneously; in addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Example 1

Referring to fig. 1 to 3, a relay includes a main body 100, a rotating assembly 200, a first movable contact 310, a first fixed contact 410 and a first electromagnetic driving assembly 500, wherein the rotating assembly 200 is rotatably disposed on the main body 100, one end of the first movable contact 310 is in transmission connection with the rotating assembly 200, the other end is connected with the main body 100, the first fixed contact 410 is disposed on the main body 100, the first electromagnetic driving assembly 500 is linked with the rotating assembly 200, when the first electromagnetic driving assembly 500 is energized, the rotating assembly 200 can be driven to rotate relative to the main body 100 to drive the first movable contact 310 to move towards a direction close to or away from the first fixed contact 410, so that the first movable contact 310 is in contact with or separated from the first fixed contact 410, when the first movable contact 310 is in contact with the first fixed contact 410, the relay is in an energized state, when the first movable contact 310 is separated from the first fixed contact 410, the relay is in a de-energized state.

Compared with the prior art, the electromagnet is electrified all the time to adsorb the movable contact piece and the static contact piece to be contacted, so that the relay is in an electrified state for a long time, and the power consumption is increased. When the first electromagnetic driving assembly 500 is powered on, the first movable contact piece 310 contacts with the first static contact piece 410, so that the relay is in a power-on state. When no current passes through the first electromagnetic driving assembly 500, the first movable contact piece 310 is separated from the first stationary contact piece 410, so that the relay is in a power-off state. The power consumption is reduced by controlling the power state of the relay according to the power state of the first electromagnetic driving assembly 500.

Specifically, as shown in fig. 2 and 5, the first electromagnetic driving assembly 500 includes a first coil 510, a first magnetic core 610, a first elastic member 710, and a first coil bobbin 810. The first electromagnetic driving assembly 500 is disposed on the main body 100, the first magnetic core 610 penetrates through the first coil 510, and the first coil 510 can generate a magnetic field when being powered on, so as to drive the first magnetic core 610 to move toward the direction close to the rotating assembly 200, so that the first magnetic core 610 abuts against and drives the rotating assembly 200 to rotate relative to the main body 100, and further drive the first movable contact piece 310 to move toward the direction close to or away from the first stationary contact piece 410, and further enable the first movable contact piece 310 to contact with or separate from the first stationary contact piece 410.

More specifically, as shown in fig. 1, the rotating assembly 200 includes a rotating member 230 and a first operating member 210, the rotating member 230 is rotatably disposed on the main body 100, specifically, the rotating member 230 can rotate relative to the main body 100, the rotating member 230 is in transmission connection with the first movable contact 310, the first operating member 210 is disposed on the rotating member 230, and the first electromagnetic driving assembly 500 is in linkage with the first operating member 210. More specifically, the first magnetic core 610 is configured to abut against the first operation member 210.

In this embodiment, as shown in fig. 1 and 2, the relay includes a second electromagnetic driving assembly 600, the second electromagnetic driving assembly 600 is disposed on the main body 100, the second electromagnetic driving assembly 600 is linked with the rotating assembly 200, and when the second electromagnetic driving assembly 600 is powered on, the rotating assembly 200 can be driven to rotate relative to the main body 100, so as to drive the first movable contact piece 310 to move towards a direction close to or away from the first fixed contact piece 410, and further, the first movable contact piece 310 is in contact with or separated from the first fixed contact piece 410.

Specifically, the second electromagnetic driving assembly 600 includes a second coil 520, a second magnetic core 620, a third elastic member 730 and a second coil skeleton 820, the second electromagnetic driving assembly 600 is disposed on the main body 100, the second magnetic core 620 is disposed in the second coil 520 in a penetrating manner, a magnetic field can be generated when the second coil 520 is energized, so as to drive the second magnetic core 620 to move towards a direction close to the rotating assembly 200, so as to enable the second magnetic core 620 to abut against and drive the rotating assembly 200 to rotate relative to the main body 100, and further to drive the first movable contact to move towards a direction close to or far away from the first stationary contact, and further to enable the first movable contact to contact with or separate from the first stationary contact.

Further, the rotating assembly 200 is provided with a second operating element 220, the second operating element 220 is disposed on the opposite side of the first operating element 210, the second electromagnetic driving assembly 600 is disposed on the main body 100, the second magnetic core 620 is disposed in the second coil 520 in a penetrating manner, and when the second coil 520 is energized, a magnetic field can be generated to drive the second magnetic core 620 to move towards the direction close to the second operating element 220, so that the second magnetic core 620 abuts against the second operating element 220, and the second operating element 220 drives the rotating element 230 to rotate relative to the main body 100. When the first magnetic core 610 abuts against the first operating element 210, the second operating element 220 is close to the second magnetic core 620, and the rotating element 230 drives the first movable contact piece 310, and when the second magnetic core 620 abuts against the second operating element 220, the first operating element 210 is close to the first magnetic core 610, and the rotating element 230 drives the first movable contact piece 310 again.

Specifically, the first operating member 210 and the second operating member 220 are symmetrically disposed with respect to the rotational member 230.

In the present embodiment, as shown in fig. 1 and fig. 2, the relay includes a first elastic member 710, and the first elastic member 710 elastically abuts against the first magnetic core 610. Specifically, the first coil framework 810 is connected with the main body 100, a through hole is formed in one end of the first coil framework 810, one end of the first coil 510, which can drive the first magnetic core 610 after being electrified, penetrates out of the through hole, the first magnetic core 610 is sleeved with the first elastic member 710, one end of the first elastic member 710 is abutted to the first coil framework 810, the other end of the first elastic member 710 is abutted to the first magnetic core 610, and the first elastic member 710 is used for providing an elastic acting force for the first magnetic core 610 to move in a direction away from the rotating assembly 200. The first elastic member 710 may be, but is not limited to, a spring. Specifically, the first elastic member 710 serves to provide the first magnetic core 610 with an elastic force toward away from the first operating member 210. More specifically, the first coil 510 is configured to be electrically connected to a circuit board, when the relay is required to be powered on, the first coil 510 is powered on instantly under the control of the circuit board, that is, the power is cut off immediately after the power is powered on, a magnetic field is generated after the first coil 510 is powered on, the first magnetic core 610 is driven to move towards a direction close to the first operating element 210, the first elastic element 710 is in a compressed state, and the first magnetic core 610 is reset to a position where the first coil 510 is located before being powered on instantly after pushing the first operating element 210 away by the first magnetic core 610, that is, under the action of the first elastic element 710.

Further, as shown in fig. 3 and 4, the first movable contact 310 is made of an elastic material, the first movable contact 310 is provided with a protruding portion 311, the rotating assembly 200 is provided with a curved surface 240 matched with the protruding portion 311 and combined with the protruding portion, the rotating assembly 200 rotates relative to the main body 100 to enable the protruding portion 311 to slide along the curved surface 240, the curved surface 240 and a vertical center line of the protruding portion 311 form an included angle, when the protruding portion 311 slides along the surface of the curved surface 240, an acting force towards a direction close to or far away from the first fixed contact 410 is generated to drive the first movable contact 310 to move towards a direction close to or far away from the first fixed contact 410, and further, the first movable contact 310 is made to contact with or separate from the first fixed contact 410 under a self elastic acting force. The protrusion 311 is coupled to the curved surface 240 by its elasticity, so that the position of the first static contact piece 310 is kept unchanged. Specifically, when the curved surface 240 rotates, the protrusion 311 slides along the surface of the curved surface 240, and urges the first movable contact piece 310 to be away from the first fixed contact piece 410, and is elastically deformed, having an elastic force toward being away from the first fixed contact piece 410, to drive the first movable contact piece 310 to be away from the first fixed contact piece 410 and to be separated from the first fixed contact piece 410, so as to power off the relay. At this time, the first movable contact piece 310 is in a deformed state and is separated from the first stationary contact piece 410 by the force of the curved surface 240, so that the relay is de-energized.

Further, the first movable contact 310 may be, but not limited to, beryllium copper, which has good elasticity and fatigue resistance and good conductivity.

Example 2

As shown in fig. 6 to 8, in the present embodiment, the relay includes a second elastic member 720, one end of the second elastic member 720 is connected to the rotating assembly 200, the other end of the second elastic member 720 is connected to the first movable contact piece 310, the rotating assembly 200 rotates relative to the main body 100, the second elastic member 720 is elastically deformed to drive the first movable contact piece 310 to move towards the first fixed contact piece 410, so that the first movable contact piece 310 contacts with the first fixed contact piece 410 and is far away from the first fixed contact piece 410 under the elastic force of the second elastic member 720, and the second elastic member 720 is used to provide the elastic force towards the first movable contact piece 310 and is far away from the first fixed contact piece 410, and can keep the position of the first movable contact piece unchanged. The second elastic member 720 may be, but is not limited to, a spring. The first movable contact spring 310 in this embodiment is connected to the rotating assembly 200 through the second elastic member 720, and the first movable contact spring 310 is reset by the elastic force of the second elastic member 720, but not by the elastic force of the first movable contact spring 310 itself, and the reset is performed by the elastic force of the first movable contact spring 310 itself, and the first movable contact spring 310 with a low thickness needs to be used, and the amount of current passing through the first movable contact spring 310 with a low thickness is limited. The thickness of the first movable contact piece 310 in this embodiment is not limited, and thus, the amount of current of the first movable contact piece 310 is increased by increasing the thickness of the first movable contact piece 310.

In this embodiment, the relay further includes a supporting frame 910, a second fixed contact 420 and a second movable contact 320, the supporting frame 910 is in transmission connection with the main body 100 and can swing relative to the main body 100, the rotating assembly 200 rotates relative to the main body 100 to drive the second elastic member 720 to elastically deform so as to drive the second movable contact 320 to move towards a direction close to or away from the second fixed contact 420, and further to make the second movable contact 320 contact with or separate from the second fixed contact 420, the supporting frame 910 is connected with the second elastic member 720, the first movable contact and the second movable contact respectively, and the supporting frame 910 is made of an insulating material to insulate the first movable contact 310 and the second movable contact 320. Specifically, the rotating assembly 200 drives the first and second movable contact pieces 310 and 320 to contact the first and second fixed contact pieces 410 and 420, respectively, to form two closed circuits, and the support frame 910 is an insulating material to insulate the first and second movable contact pieces 310 and 320, so that the two closed circuits do not affect each other.

More specifically, the supporting frame 910 may be, but is not limited to, a plastic material. Further, the first movable contact piece 310, the second movable contact piece 320, the first stationary contact piece 410, and the second stationary contact piece 420 are provided with silver contacts. The silver contact increases the contact effect between the first movable contact piece 310 and the first stationary contact piece 410 and between the second movable contact piece 320 and the second stationary contact piece 420, enhancing the conductivity.

Example 3

As shown in fig. 9 and 10, the relay further includes a connection terminal 920, one end of the connection terminal 920 is connected to the first movable contact piece 310, the other end of the connection terminal 920 is disposed outside the main body 100 and connected to an external electrical appliance, and the first fixed contact piece 410 is disposed outside the main body 100 and connected to the external electrical appliance at an end away from the first movable contact piece 310. In the small household appliance industry, the relay in the prior art realizes electrification by stacking very thick soldering tin on a circuit board and welding a wire, so that the assembly and repair cost is increased. In this embodiment, binding post 920 and first static contact 410 all set up outside main part 100 to make the direct and binding post 920 of electric wire and first static contact 410 high-speed joint of outside electrical apparatus, thereby greatly reduced circuit board processing cost, and the cost of reduction equipment and rework maintenance.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A relay, comprising:

a main body;

the rotating assembly is rotatably arranged on the main body;

one end of the first movable contact piece is in transmission connection with the rotating assembly, and the other end of the first movable contact piece is connected with the main body;

the first static contact piece is arranged on the main body; and

the first electromagnetic driving component is arranged on the main body and linked with the rotating component, the first electromagnetic driving component can drive the rotating component to rotate relative to the main body when being electrified so as to drive the first movable contact piece to move towards the direction close to or away from the first static contact piece, and further to enable the first movable contact piece to be in contact with or separated from the first static contact piece, when the first movable contact piece is in contact with the first static contact piece, the relay is in an electrified state, and when the first movable contact piece is separated from the first static contact piece, the relay is in a power-off state.

2. The relay according to claim 1, wherein the first electromagnetic driving assembly includes a first coil and a first magnetic core, the first coil is disposed on the main body, the first magnetic core is disposed in the first coil, and when the first coil is energized, a magnetic field is generated to drive the first magnetic core to move toward a direction close to the rotating assembly, so that the first magnetic core abuts against and drives the rotating assembly to rotate relative to the main body, and further the first movable contact is driven to move toward a direction close to or away from the first stationary contact, and further the first movable contact is contacted with or separated from the first stationary contact.

3. The relay according to claim 2, wherein the relay comprises a first elastic member elastically abutting against the first magnetic core.

4. The relay according to claim 1, wherein the rotating assembly includes a rotating member and a first operating member, the rotating member is rotatably disposed on the main body, the rotating member is in transmission connection with the first movable contact, and the first electromagnetic driving assembly is linked with the first operating member to drive the first movable contact to move toward or away from the first fixed contact.

5. The relay according to claim 1, wherein the relay includes a second electromagnetic driving assembly, the second electromagnetic driving assembly is disposed on the main body, the second electromagnetic driving assembly is linked with the rotating assembly, and when the second electromagnetic driving assembly is powered on, the rotating assembly can be driven to rotate relative to the main body so as to drive the first movable contact piece to move towards a direction close to or away from the first stationary contact piece, so that the first movable contact piece is in contact with or separated from the first stationary contact piece.

6. The relay according to claim 5, wherein the second electromagnetic driving assembly includes a second coil and a second magnetic core, the second coil is disposed on the main body, the second magnetic core is disposed in the second coil, and the second coil generates a magnetic field when being energized to drive the second magnetic core to move toward a direction close to the rotating assembly, so that the second magnetic core abuts against the rotating assembly and drives the rotating assembly to rotate relative to the main body, and further drives the first movable contact to move toward a direction close to or away from the first stationary contact, and further causes the first movable contact to contact with or separate from the first stationary contact.

7. The relay according to claim 1, wherein said first movable contact is made of an elastic material, said first movable contact is provided with a protrusion, said rotating member has a curved surface engaged with said protrusion, said rotating member rotates relative to said main body to slide said protrusion along said curved surface, said curved surface can drive said first movable contact to move toward or away from said first stationary contact, so that said first movable contact is brought into contact with or separated from said first stationary contact under its own elastic force, and said curved surface can simultaneously hold said protrusion at a current position without being changed.

8. The relay according to claim 1, wherein said relay includes a second elastic member, one end of said second elastic member is connected to said rotating member, the other end of said second elastic member is connected to said first movable contact piece, said rotating member rotates relative to said main body to drive said first movable contact piece to move in a direction approaching to said first fixed contact piece so as to make said first movable contact piece contact with said first fixed contact piece and move away from said first fixed contact piece under the elastic force of said second elastic member, said second elastic member is used for providing the elastic force of said first movable contact piece away from said first fixed contact piece, and can keep the position of said first movable contact piece from being changed.

9. The relay according to claim 8, further comprising a terminal having one end connected to the first movable contact, the other end of the terminal being disposed outside the main body and connected to an external electrical appliance, the first stationary contact being disposed outside the main body and connected to the external electrical appliance at an end remote from the first movable contact.

10. The relay according to claim 8, further comprising a support frame, a second fixed contact piece and a second movable contact piece, wherein the support frame is connected with the main body and can swing relative to the main body, and the second movable contact piece can move towards or away from the second fixed contact piece under the driving of the rotating assembly, so that the second movable contact piece is contacted with or separated from the second fixed contact piece;

the support frame is connected with the second elastic piece, the first movable contact piece and the second movable contact piece respectively, and the support frame is made of insulating materials so as to insulate the first movable contact piece and the second movable contact piece.

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