CN216120116U

CN216120116U - Relay

Info

Publication number: CN216120116U
Application number: CN202122070363.0U
Authority: CN
Inventors: 唐俊平; 王亚宾; 黄嘉健; 秦祖超
Original assignee: Sanyou Corp Ltd
Current assignee: Sanyou Corp Ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-03-22
Anticipated expiration: 2031-08-30

Abstract

The utility model discloses a relay, which relates to the technical field of electrical switches and comprises a shell, a contact assembly, an electromagnetic assembly, a push rod assembly and a reset assembly, wherein the contact assembly comprises a fixed contact fixed with the shell and a movable contact movably arranged relative to the fixed contact; one of the moving contact and the fixed contact is provided with an arc-shaped first contact bulge, the other one of the moving contact and the fixed contact is provided with an arc-shaped second contact bulge or an arc-shaped contact groove, and the highest point of the first contact bulge and the highest point of the second contact bulge or the projection of the lowest point of the contact groove on the horizontal plane are arranged in a staggered mode. In the relay provided by the utility model, the movable contact and the fixed contact can generate a rubbing effect of mutual sliding, so that the adhesion phenomenon caused by overheating of the contacts can be reduced, and the relay has stable work and long service life.

Description

Relay

Technical Field

The utility model relates to the technical field of electrical switches, in particular to a relay.

Background

The relay (English name: relay) is an electric control device, when the change of input quantity (exciting quantity) is up to the defined requirement, it is an electric appliance capable of making the controlled quantity produce predefined step change in the electric output circuit, and it possesses the interaction relation between control system (also called input circuit) and controlled system (also called output circuit), and is usually used in automatic control circuit, and it is an "automatic switch" which actually uses small current to control large current operation, so that it can implement the functions of automatic regulation, safety protection and switching circuit in the circuit.

At present, the movable contact and the static contact in the common relay adopt the contact mode of a plane contact, and in the actual application of the structure, because the contact surface of the movable contact and the static contact is large and the contact time is long, the electric arc generated when the movable contact and the static contact are conducted is easy to overheat the surfaces of the movable contact and the static contact, so that materials are melted, the adhesion phenomenon of the movable contact and the static contact finally occurs, and the service life of the relay is greatly influenced.

Therefore, it is desirable to provide a relay that optimizes the contact sticking phenomenon.

SUMMERY OF THE UTILITY MODEL

In order to overcome at least one of the defects of the prior art, the utility model provides a relay, which is used for optimizing the defect that the contact adhesion exists in the prior relay.

The technical scheme adopted by the utility model for solving the problems is as follows:

according to one aspect of the present invention, there is provided a relay comprising: a housing; the contact assembly comprises a fixed contact fixed with the shell and a movable contact movably arranged relative to the fixed contact; the electromagnetic assembly comprises a coil, an armature, a yoke and a fixed iron core, wherein the fixed iron core is movably arranged in the shell and can be close to or far away from the fixed iron core; the push rod component is used for connecting the movable contact and the armature, and the movable contact can move on a horizontal plane at least relative to the push rod component; the reset assembly is connected with the armature and the fixed iron core and used for providing a reset force deviating from the direction of the fixed iron core for the armature so as to reset the armature; one of the moving contact and the fixed contact is provided with an arc-shaped first contact bulge, the other one of the moving contact and the fixed contact is provided with an arc-shaped second contact bulge or an arc-shaped contact groove, and the highest point of the first contact bulge and the highest point of the second contact bulge or the projection of the lowest point of the contact groove on the horizontal plane are arranged in a staggered mode.

Furthermore, the first contact bulges are arranged on the moving contact, the second contact bulges are arranged on the fixed contact, one first contact bulge and one second contact bulge are correspondingly arranged in groups to form a contact assembly, and at least two groups of contact assemblies are arranged.

Further, the highest points of the first contact protrusions in different contact assemblies toward the stationary contact side are on the same horizontal plane.

Further, the highest point of the first contact projection toward the stationary contact side in the different contact assemblies is on a different level.

Further, the highest points of the second contact protrusions in different contact assemblies toward the stationary contact side are on the same horizontal plane.

Furthermore, the movable contact is arranged on a movable contact plate, a through hole is formed in the movable contact plate, the push rod assembly comprises a push rod body and a pressing spring, one end of the push rod body is fixed with the armature, the other end of the push rod body penetrates through the through hole in a sliding mode, a limiting part capable of being abutted to the surface of the movable contact plate is arranged at the end, far away from one end of the armature, of the push rod body, one end of the pressing spring is fixed with the push rod body, and the other end of the pressing spring is fixed with the surface of the movable contact plate and exerts elastic force on the movable contact plate to enable the movable contact plate to be abutted to the limiting part.

Furthermore, the inner wall of the through hole is provided with an inclined abutting surface in the direction departing from the limiting part.

Furthermore, the locating part is the jump ring for the axle of joint in this end of body of push rod.

Through setting up like this, be convenient for move the assembly of touch panel on the push pedal body, and dismantle the convenience, the debugging of being convenient for.

Furthermore, the movable contact is integrally formed on the movable contact plate or assembled and fixed with the movable contact plate, the fixed contact is arranged on a fixed connecting terminal, and the fixed contact is integrally formed on the fixed connecting terminal or assembled and fixed with the fixed connecting terminal.

Furthermore, the fixed iron core and the armature are accommodated in a sliding sleeve made of a non-ferromagnetic material, wherein the fixed iron core is fixed relative to the sliding sleeve, the armature is slidably connected with an inner cavity of the sliding sleeve to be close to or far away from the fixed iron core, the yoke comprises a magnetic conduction sleeve and an intermediate magnetic conduction piece, the magnetic conduction sleeve is arranged outside the sliding sleeve and at least partially arranged opposite to the armature at intervals, and the intermediate magnetic conduction piece is respectively connected with the fixed iron core and the magnetic conduction sleeve.

According to the technical scheme, the embodiment of the utility model at least has the following advantages and positive effects:

1) the movable contact and the fixed contact can generate a twisting effect of mutual sliding, so that the adhesion phenomenon caused by overheating of the contacts can be reduced, and the service life of the relay contacts is prolonged;

2) the lifting sliding and the automatic resetting of the movable contact plate along the push rod assembly are realized by arranging the abutting spring;

3) the inclined bottom interface is arranged in the through hole of the movable contact plate, and after the movable contact is pressed by the static contact, the movable contact plate can turn over at a certain angle, so that the inclined pressing surface is pressed against the push rod body, and the sliding and twisting process of the movable contact and the static contact is further facilitated;

4) through setting up the sliding sleeve, avoid armature and flux sleeve's frictional wear, avoid the performance decline between armature and flux sleeve after the contact breaks off and closes many times, prolong relay's life.

Drawings

Fig. 1 is a schematic view of an overall internal structure of a relay according to embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of the relay in FIG. 1 after the structure of a hidden part is hidden;

FIG. 3 is a schematic diagram showing the structure of the moving and stationary contacts of the relay according to embodiment 1 of the present invention;

fig. 4 is a schematic diagram of the moving contact and the fixed contact of the relay in a disengaged state according to embodiment 1 of the present invention;

FIG. 5 is a schematic view of the movable and stationary contacts of FIG. 4 in a closed state;

FIG. 6 is a schematic view of a connection structure and a movement relationship between the movable contact plate and the push rod body in embodiment 1 of the present invention;

FIG. 7 is a schematic diagram showing the structure of the moving and stationary contacts of the relay according to embodiment 2 of the present invention;

fig. 8 is a schematic diagram of the structure of the moving contact and the stationary contact of the relay according to embodiment 3 of the present invention.

Wherein the reference numerals have the following meanings:

1. a housing; 101. an upper cover; 102. a base; 2. a contact assembly; 201. a stationary contact; 2011. a stationary connection terminal; 202. a movable contact; 2021. a movable touch plate; 20211. a through hole; 20212. an inclined abutting surface; 3. an electromagnetic assembly; 301. a coil; 302. an armature; 303. a yoke; 3031. a flux sleeve; 3032. an intermediate magnetically conductive member; 30321. a first portion; 30322. a second portion; 304. fixing the iron core; 4. a push rod assembly; 401. a push rod body; 4011. a limiting member; 402. pressing the spring; 5. a reset assembly; 6. arc blowing magnetic steel; 7. a first contact bump; 8. a second contact bump; 9. a contact groove; 10. and (4) a sliding sleeve.

Detailed Description

For better understanding and implementation, 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.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Example 1

Referring to fig. 1 to 6, the present invention discloses a relay, including: the contact mechanism comprises a shell 1, a contact assembly 2, an electromagnetic assembly 3, a push rod assembly 4 and a reset assembly 5, wherein the shell 1 further comprises an upper cover 101 and a base 102, and the contact assembly 2, the electromagnetic assembly 3, the push rod assembly 4 and the reset assembly 5 are arranged in the space of the base 102 and the upper cover 101.

The relay further comprises arc-blowing magnetic steel 6 arranged on the inner side of the upper cover 101 and used for blowing the arc generated when the contact is contacted to the inner wall of the upper cover 101 to realize arc extinction.

The contact assembly 2 comprises a fixed contact 201 fixed with the shell 1 and a movable contact 202 movably arranged relative to the fixed contact 201, wherein one of the movable contact 202 and the fixed contact 201 is provided with an arc-shaped first contact bulge 7, the other one is provided with an arc-shaped second contact bulge 8 or an arc-shaped contact groove 9, the highest point of the first contact bulge 7 and the highest point of the second contact bulge 8 or the lowest point of the contact groove 9 are arranged in a staggered mode on the horizontal plane, namely, the projections do not coincide;

the highest point of the first contact protrusion 7 means that, when the first contact protrusion 7 is disposed on the movable contact 202, the highest point of the first contact protrusion 7 is the closest point of the surface of the first contact protrusion 7 toward the side of the fixed contact 201; similarly, if the first contact projection 7 is provided on the fixed contact 201, the highest point of the first contact projection 7 is the closest point of the surface of the first contact projection 7 toward the side of the movable contact 202.

Similarly, the highest point of the second contact protrusion 8 means that, if the second contact protrusion 8 is disposed on the moving contact 202, the highest point of the second contact protrusion 8 is the closest point of the surface of the second contact protrusion 8 toward the fixed contact 201 side; if the second contact protrusion 8 is provided on the stationary contact 201, the highest point of the second contact protrusion 8 is the closest point of the surface of the second contact protrusion 8 toward the movable contact 202 side.

The lowest point of the contact groove 9 means that if the contact groove 9 is provided on the movable contact 202, the lowest point of the contact groove 9 is the farthest point of the surface of the contact groove 9 away from the fixed contact 201; similarly, if the contact recess 9 is provided on the stationary contact 201, the lowest point of the contact recess 9 is the point farthest from the side of the surface of the contact recess 9 facing away from the movable contact 202.

The electromagnetic assembly 3 comprises a coil 301, an armature 302, a yoke 303 and a fixed iron core 304, wherein the fixed iron core 304 is movably arranged in the housing 1 and can be close to or far away from the fixed iron core 304, the coil 301 is wound on the periphery of the fixed iron core 304, the yoke 303 is connected with the fixed iron core 304, the coil 301 magnetizes the fixed iron core 304 when electrified so as to attract the armature 302 to move towards the direction close to the fixed iron core 304, and the armature 302, the yoke 303 and the fixed iron core 304 form a closed magnetic loop;

the push rod assembly 4 is used for connecting the movable contact 202 with the armature 302, and the movable contact 202 can move at least in a horizontal plane relative to the push rod assembly 4;

the reset assembly 5 is coupled to the armature 302 and the stationary core 304 and is configured to provide a reset force to the armature 302 in a direction away from the stationary core 304 to reset the armature 302.

The reset assembly 5 may be a spring having one end abutting the stationary core 304 and the other end abutting the armature 302.

The spring can be replaced by other elastic components, such as rubber and silica gel, or a device with linear driving capability, such as an electric push rod.

By such arrangement, since the highest point of the first contact protrusion 7 and the highest point of the second contact protrusion 8 or the projection of the lowest point of the contact groove 9 on the horizontal plane are staggered, and the movable contact 202 can move on the horizontal plane relative to the rod assembly, when the movable contact 202 and the fixed contact 201 are closed, the coil 301 is electrified to magnetize the fixed iron core 304, so as to attract the armature 302 to move towards the fixed iron core 304, and the armature 302 is connected with the movable contact 202 through the push rod assembly 4, thereby driving the contact 202 to move towards the fixed contact 201, when the movable contact 202 is abutted to the fixed contact 201, the movable contact 202 and the fixed contact 201 can avoid the point position (i.e. the highest point of the first contact protrusion 7, the lowest point of the second contact protrusion 8 or the contact groove 9) to contact and generate relative sliding, that is, the surface of the first contact protrusion 7 is abutted to the surface of the second contact protrusion 8 or the contact groove 9 and generates sliding along the arc-shaped surface Therefore, the movable contact 202 and the fixed contact 201 can generate a twisting effect of mutual sliding, so that the adhesion phenomenon of the contacts due to overheating can be reduced, and the service life of the relay contacts is prolonged.

Referring to fig. 1 to 5, in the present embodiment, the first contact protrusion 7 is disposed on the moving contact 202, the second contact protrusion 8 is disposed on the stationary contact 201, and a first contact protrusion 7 and a second contact protrusion 8 are correspondingly disposed in a group to form a contact assembly (not labeled in the figures), and the contact assemblies are disposed in at least two groups.

Through the arrangement, the first contact point can be arranged on the movable contact point 202, the second contact protrusion 8 is arranged on the fixed contact point 201 corresponding to the first contact protrusion 7, at least two groups of contact assemblies consisting of the first contact protrusion 7 and the second contact protrusion 8 are arranged, and the contact assemblies can be applied to a series circuit, namely, after the movable contact point 202 and the fixed contact point 201 are closed, current can flow in from the contact assembly 2 on one side and flow out from the contact assembly 2 on the other group in sequence, and the contact assemblies can be applied as a switch and have high conductive stability.

Of course, the contact elements may be provided in only one set, and may be used in applications requiring single-point opening or closing.

It should be noted that, in another scheme, the second contact protrusion 8 is disposed on the movable contact 202, and the first contact protrusion 7 is disposed on the fixed contact 201, which is consistent with the implementation process of the above scheme and is not described herein again.

In a first possible embodiment, the highest points of the first contact protrusions 7 of the different contact assemblies towards the side of the stationary contact 201 are on the same horizontal plane.

In a second possible embodiment, the highest point of the first contact protrusion 7 towards the stationary contact 201 side in different contact assemblies is at different levels.

In a third possible embodiment, the highest points of the second contact protrusions 8 in different contact assemblies towards the side of the stationary contact 201 are on the same horizontal plane.

In a fourth possible embodiment, the highest points of the first contact protrusions 7 in different contact assemblies towards the side of the stationary contact 201 are at different levels.

Referring to fig. 1, 2, 4, 5, and 6, in a possible embodiment, the movable contact 202 is disposed on a movable contact plate 2021, a through hole 20211 is disposed on the movable contact plate 2021, the push rod assembly 4 includes a push rod body 401 and a pressing spring 402, one end of the push rod body 401 is fixed to the armature 302, the other end of the push rod body is disposed to slide through the through hole 20211, a stopper 4011 capable of abutting against a surface of the movable contact plate 2021 is disposed at an end of the push rod body 401 far from the armature 302, one end of the pressing spring 402 is fixed to the push rod body 401, and the other end of the pressing spring is fixed to the surface of the movable contact plate 2021 and applies an elastic force to the movable contact plate 2021 to abut against the stopper 4011.

Through the arrangement, the horizontal movement of the movable contact 202 on the movable contact plate 2021 relative to the push rod assembly 4 can be realized to match the sliding and twisting process of the movable contact 202 and the fixed contact 201, and the abutting spring 402 can provide abutting elastic force for the movable contact plate 2021, so that the movable contact plate 2021 can not only slide up and down relative to the push rod body 401 in the sliding and twisting process, but also provide elastic force for the movable contact plate 2021 to enable the movable contact plate 2021 to slide along the rod body direction and automatically reset in the horizontal direction.

Referring to fig. 2, it should be noted that when the contact assemblies 2 are arranged in at least two groups, the contact assemblies 2 should be arranged on two sides of the through hole 20211, so that the connection line of the highest point of the first contact protrusion 7 in different groups of the contact assemblies 2 is different from the connection line of the second contact protrusion 8, and when different contact assemblies are closed, the movable contact 2021 can horizontally rotate around the push rod body 401 in the direction Q shown in the figure, so as to achieve the sliding and twisting process between the contacts.

Referring to fig. 3 and 6, further, an inclined abutting surface 20212 is disposed on the inner wall of the through hole 20211 in a direction away from the limiting element 4011.

Through the arrangement, after the movable contact 202 is pressed by the fixed contact 201, as shown in the direction M in the figure, the movable contact plate 2021 can be turned over at a certain angle, so that the inclined contact surface 20212 is contacted with the push rod body 401, thereby further facilitating the sliding and twisting process of the movable contact 202 and the fixed contact 201.

Referring to fig. 1 and fig. 2, in a possible embodiment, the limiting member 4011 is a shaft snap spring clamped at an end of the push rod body 401.

Through setting up like this, be convenient for move the assembly of touch pad 2021 on the push pedal body, and dismantle the convenience, be convenient for the debugging.

In a possible embodiment, the movable contact 202 is integrally formed on the movable contact plate 2021, or the movable contact 202 and the movable contact plate 2021 are separately formed and then assembled and fixed with the movable contact plate 2021, and the fixing manner may be welding, riveting, gluing, screwing, or connecting by a screw fastener, and only the movable contact 202 needs to be stably fixed on the movable contact plate 2021.

In a possible embodiment, the fixed contact 201 is disposed on a fixed connection terminal 2011, and the fixed contact 201 is integrally formed on the fixed connection terminal 2011, or the fixed contact 201 and the fixed connection terminal 2011 are respectively and independently processed and then assembled into a whole, and the fixing mode can refer to the fixing of the movable contact 202 and the movable contact plate 2021.

Referring to fig. 1, in one possible embodiment, the fixed iron core 304 and the armature 302 are accommodated in a sliding sleeve 10 made of a non-ferromagnetic material, the sliding sleeve 10 may be a copper sleeve, wherein the fixed iron core 304 is fixed relative to the sliding sleeve 10, the armature 302 is slidably connected to an inner cavity of the sliding sleeve 10 so as to be close to or far from the fixed iron core 304, the yoke 303 includes a magnetic sleeve 3031 and an intermediate magnetic member 3032, the magnetic sleeve 3031 is disposed outside the sliding sleeve 10 and at least partially faces the armature 302 in a spaced manner, and the intermediate magnetic member 3032 connects the fixed iron core 304 and the magnetic sleeve 3031, respectively.

More specifically, intermediate magnetically permeable member 3032 includes a first portion 30321 and a second portion 30322 that are coupled.

Through the arrangement, the intermediate magnetic conduction member 3032 is respectively connected with the fixed iron core 304 and the magnetic conduction sleeve 3031, the magnetic conduction sleeve 3031 is arranged outside the sliding sleeve 10 and is at least partially opposite to the armature 302 at intervals, so that when the armature 302 and the fixed iron core 304 are closed, a closed magnetic loop is formed, and in the process that the armature 302 slides relative to the fixed iron core 304, the armature 302 slides in the sliding sleeve 10 without being directly contacted with the magnetic conduction sleeve 3031 of the yoke 303, so that the abrasion of the armature 302 and the magnetic conduction sleeve 3031 caused by the friction between the magnetic conduction sleeve 3031 and the armature 302 can be avoided, therefore, after repeated closing and opening actions of the movable contact 202 and the fixed contact 201, the service performance reduction of the armature 302 and the magnetic conduction sleeve 3031 can be avoided, and the service life of the relay is prolonged.

The working process and principle of the embodiment of the utility model are as follows:

referring to fig. 1 and 5, when the moving contact 202 and the fixed contact 201 are closed, the coil 301 is energized to magnetize the fixed iron core 304, so as to attract the armature 302 to move in a direction approaching the fixed iron core 304, and the armature 302 is connected with the moving contact 202 through the push rod assembly 4, thereby driving the contact 202 to move in a direction approaching the fixed contact 201, when the moving contact 202 approaches the fixed contact 201 to abut, the moving contact 202 applies an abutting force F0 to the fixed contact 201, the moving contact 202 and the fixed contact 201 can avoid the extreme position, so that the F0 can be decomposed into a component force F1 parallel to the axial direction of the push rod body 401, i.e. the moving direction of the moving contact plate 2021, and a component force F2 in the horizontal direction, and the first contact protrusion 7 and the second contact protrusion 8 slide along the arc surfaces of each other, thereby the component force F2 drives the moving contact 202 to move in the horizontal direction, thereby generating a rubbing effect of mutual sliding between the moving contact 202 and the fixed contact 201, therefore, the adhesion phenomenon of the contacts caused by overheating can be reduced, and the service life of the relay contacts is prolonged.

Example 2

Referring to fig. 7, the present embodiment is different from embodiment 1 only in that in the present embodiment, the first contact protrusion 7 is provided on the fixed contact 201, and the contact recess 9 is provided on the movable contact 202.

similar to embodiment 1, when the moving contact 202 and the fixed contact 201 are closed, the coil 301 is energized to magnetize the fixed iron core 304, so as to attract the armature 302 to move towards the fixed iron core 304, and the armature 302 is connected with the moving contact 202 through the push rod assembly 4, so as to drive the contact 202 to move towards the fixed contact 201, when the moving contact 202 is abutted against the fixed contact 201, the moving contact 202 and the fixed contact 201 can avoid the pole position, and the first contact bulge 7 and the contact groove 9 mutually slide along the arc-shaped surfaces of the other side, so that a twisting effect of mutual sliding can be generated between the moving contact 202 and the fixed contact 201, thereby reducing the adhesion phenomenon generated by overheating of the contacts, and prolonging the service life of the relay contacts.

Example 3

Referring to fig. 8, the present embodiment is different from embodiment 2 only in that in the present embodiment, the first contact protrusion 7 is provided on the movable contact 202, and the contact recess 9 is provided on the stationary contact 201.

The working process and principle of this embodiment are the same as those of embodiment 2, and are not described herein again.

In summary, in the relay provided by the present invention, the moving contact 202 and the stationary contact 201 can generate a rubbing effect of mutual sliding, so that the adhesion phenomenon caused by overheating of the contacts can be reduced, the relay is stable in operation, and has a long service life.

The technical means disclosed in the utility model scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.

Claims

1. A relay, comprising:

a housing (1);

a contact assembly (2) comprising a stationary contact (201) fixed with the housing (1) and a movable contact (202) movably arranged with respect to the stationary contact (201);

the electromagnetic assembly (3) comprises a coil (301), an armature (302), a yoke (303) and a fixed iron core (304), wherein the fixed iron core (304) is movably arranged in the shell (1) and can be close to or far away from the fixed iron core (304), the coil (301) is wound on the periphery of the fixed iron core (304), the yoke (303) is connected with the fixed iron core (304), and the coil (301) magnetizes the fixed iron core (304) when electrified so as to attract the armature (302) to move towards the direction close to the fixed iron core (304), so that the armature (302), the yoke (303) and the fixed iron core (304) form a closed magnetic loop;

a push rod assembly (4) for connecting the movable contact (202) with the armature (302), the movable contact (202) being movable at least in a horizontal plane with respect to the push rod assembly (4); and

the reset assembly (5) is connected with the armature (302) and the fixed iron core (304) and is used for providing a reset force to the armature (302) in a direction away from the fixed iron core (304) so as to reset the armature (302);

one of the movable contact (202) and the fixed contact (201) is provided with an arc-shaped first contact protrusion (7), the other one of the movable contact and the fixed contact is provided with an arc-shaped second contact protrusion (8) or an arc-shaped contact groove (9), and the highest point of the first contact protrusion (7) and the highest point of the second contact protrusion (8) or the projection of the lowest point of the contact groove (9) on the horizontal plane are arranged in a staggered manner.

2. The relay according to claim 1, wherein said first contact protrusion (7) is provided on said movable contact (202), said second contact protrusion (8) is provided on said stationary contact (201), a corresponding set of said first contact protrusion (7) and a corresponding set of said second contact protrusion (8) is provided, forming a contact assembly, said contact assembly being provided in at least two sets.

3. The relay according to claim 2, characterized in that the highest points of the first contact protrusions (7) in different contact assemblies towards the side of the stationary contact (201) are on the same horizontal plane.

4. The relay according to claim 2, characterized in that the highest points of the first contact protrusions (7) in different contact assemblies towards the stationary contact (201) side are on different levels.

5. The relay according to any of claims 2-4, characterized in that the highest points of the second contact protrusions (8) in different contact assemblies towards the side of the stationary contact (201) are in the same horizontal plane.

6. The relay according to claim 1, wherein the movable contact (202) is disposed on a movable contact plate (2021), a through hole (20211) is disposed on the movable contact plate (2021), the push rod assembly (4) includes a push rod body (401) and a pressing spring (402), one end of the push rod body (401) is fixed to the armature (302), and the other end of the push rod body is disposed to slide through the through hole (20211), a limiting member (4011) capable of abutting against a surface of the movable contact plate (2021) is disposed at an end of the push rod body (401) far away from one end of the armature (302), one end of the pressing spring (402) is fixed to the push rod body (401), and the other end of the pressing spring is fixed to the surface of the movable contact plate (2021) and applies an elastic force to the movable contact plate (2021) to cause the movable contact plate (2021) to abut against the limiting member (4011).

7. The relay according to claim 6, characterized in that the inner wall of the through hole (20211) is provided with an inclined abutment surface (20212) in a direction away from the stopper (4011).

8. The relay according to claim 6, wherein the limiting member (4011) is a shaft clamp spring clamped at the end of the push rod body (401).

9. The relay according to claim 1, wherein the fixed iron core (304) and the armature (302) are accommodated in a sliding sleeve (10) made of a non-ferromagnetic material, wherein the fixed iron core (304) is fixed relative to the sliding sleeve (10), the armature (302) is slidably connected with an inner cavity of the sliding sleeve (10) to be close to or far away from the fixed iron core (304), the yoke (303) comprises a magnetic sleeve (3031) and an intermediate magnetic conduction member (3032), the magnetic sleeve (3031) is arranged outside the sliding sleeve (10) and at least partially arranged opposite to the armature (302) in a spaced manner, and the intermediate magnetic conduction member (3032) is respectively connected with the fixed iron core (304) and the magnetic sleeve (3031).