CN113675043A - Contact structure and relay - Google Patents

Abstract

The invention discloses a contact structure and a relay, and relates to the technical field of relay structures, wherein the contact structure comprises a static contact, a first conductive contact part and a second conductive contact part, wherein the first conductive contact part is arranged on the static contact; the moving contact is movably arranged relative to the fixed contact and is provided with a conductive second contact part; the moving contact can be close to the static contact and enables the second contact part to be abutted against the first contact part, and the normal directions of the abutting surfaces of the first contact part and the second contact part are not collinear with the moving directions of the first contact part and the second contact part which are close to or far away from each other. The contact structure and the relay weaken the influence of electric repulsion on the closing of the moving contact and the static contact, improve the tightness of the electrical connection between the moving contact and the static contact after the moving contact and the static contact are closed, ensure that the closed state of the contact structure is stable, and improve the stability and the reliability of the relay.

Description

Contact structure and relay

Technical Field

The invention relates to the technical field of relay structures, in particular to a contact structure and a relay.

Background

In the prior art, as shown in fig. 1, a contact structure 1 of a relay generally includes a fixed contact 101 and a movable contact 102, and when the movable contact 102 and the fixed contact 101 of the relay are closed, an electric repulsive force is generated, that is, when the movable contact 102 moves toward the fixed contact 101 along a direction G to be closed with the fixed contact 101, an electric repulsive force is generated between the two, where a force acting on the fixed contact 101 is F, and forces acting on the movable contact 102 are F 'and F' cause a closing resistance to the movable contact 102 and the fixed contact 101, so that the movable contact 102 and the fixed contact 101 are not tightly closed, a gap exists between the movable contact 102 and the fixed contact 102 to generate an electric arc, and the generation of the electric arc causes the movable contact 102 and the fixed contact 101 to be fusion-welded and bonded, thereby affecting the contact and separation of the movable contact 102 and the fixed contact 101.

Therefore, a need exists for a tightly closed and easily separable contact design.

Disclosure of Invention

In order to overcome at least one of the above-mentioned drawbacks of the prior art, a first object of the present invention is to provide a contact structure, so as to solve the problem that the closing effect of the prior contact structure is affected by the existence of electric repulsion.

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

a contact structure, comprising: the static contact is provided with a conductive first contact part; the moving contact is movably arranged relative to the fixed contact and is provided with a conductive second contact part; the moving contact can be close to the static contact and enables the second contact part to be abutted against the first contact part, and the normal directions of the abutting surfaces of the first contact part and the second contact part are not collinear with the moving directions of the first contact part and the second contact part which are close to or far away from each other.

Further, the first contact portion and the second contact portion are both rigid and wedge-shaped.

Furthermore, one of the first contact part and the second contact part is provided with a contact groove, the other one of the first contact part and the second contact part is provided with a contact protrusion, the contact protrusion can be inserted into the contact groove and is abutted against the inner wall of the contact groove, so that the movable contact is electrically connected with the fixed contact, and the normal direction of the abutting surface is not collinear with the plugging direction of the movable contact and the fixed contact.

Furthermore, at least one of the inner wall of the contact groove and the surface of the contact protrusion abutted against the inner wall of the contact groove and the direction in which the contact protrusion is inserted into the contact groove are arranged at an inclination angle.

Further, the contact groove is one of a cylinder, a polygonal prism, a cone and a polygonal pyramid, and the contact protrusion is one of a cylinder, a polygonal prism, a cone and a polygonal pyramid.

Further, at least one of the inner wall of the contact groove and the surface of the contact projection abutting against the inner wall of the contact groove is a curved surface.

Further, the contact protrusion and the static contact or the moving contact are integrally formed, or the contact protrusion and the static contact or the moving contact are fixedly connected in one or a combination of a plurality of modes, such as welding, threaded connection and riveting.

Preferably, the contact projection is riveted to the stationary contact or the movable contact.

Further, the contact groove is integrally formed on the static contact or the moving contact, or the contact groove is opened on a mounting component, and the mounting component and the static contact or the moving contact are fixedly connected by adopting one or a combination of a plurality of modes of welding, threaded connection and riveting.

Preferably, the mounting component and the static contact or the moving contact are fixed in a riveting mode.

Furthermore, the contact groove is arranged on a mounting component, the mounting component is fixed with the moving contact or the static contact, a plurality of through grooves are formed in the mounting component along the circumferential direction of the inner wall of the contact groove, and the through grooves extend from the end face of the contact groove to the bottom face.

Further, the through groove is in a straight strip shape or a spiral arc shape.

Through setting up like this, adopt the logical groove of two kinds of forms, the homoenergetic makes the contact recess have certain elastic deformation and from resilience performance, from this for the contact recess can cushion and contact bellied contact, and play the effect of holding tightly to the contact arch.

Further, the height of the contact protrusion is smaller than the depth of the contact groove.

Through setting up like this for the bellied tip of contact keeps the interval with the bottom of contact recess, avoids the bellied tip of contact and the bottom collision of contact recess and causes both sides damage, protects contact arch and contact recess, prolongs contact structure's life.

Further, when the contact protrusion is inserted into the contact groove and abuts against the inner wall of the contact groove, the surface of the movable contact and the surface of the stationary contact maintain a gap.

Through the arrangement, the electric repulsion force generated in the conductive process of the moving contact and the static contact is mainly formed at the connecting position of the contact protrusion and the contact groove, the direct formation of the electric repulsion force on the surfaces of the moving contact and the static contact is avoided, and the connection stability is improved.

Based on the same inventive concept, a second object of the present invention is to provide a relay, which includes any one of the above contact structures.

Through setting up like this, apply to the relay with the contact structure after improving, can make the closure of relay stable, make its reliable operation.

In summary, the contact structure and the relay provided by the invention have the following technical effects:

1) the second contact part on the moving contact is abutted with the first contact part to be electrically connected, and the electric repulsion generated when the moving contact is electrically conducted with the static contact mainly follows the normal direction of the abutting surface of the first contact part and the second contact part, and the normal direction of the abutting surface is not collinear with the moving direction of the first contact part and the second contact part close to or far away from the first contact part and the second contact part, so that the influence of the electric repulsion on the contact of the second contact part and the first contact part is weakened, the second contact part is not easy to be separated from the first contact part due to the bounce of the electric repulsion, the connection of the moving contact and the static contact is stable and reliable, and the closing effect of the contact structure is improved;

2) the second contact part and the first contact part are arranged in a structure form that the contact protrusion is in plug-in contact with the contact groove, and the electric repulsion force generated when the moving contact and the static contact are conductive mainly along the normal direction of the butt surface of the contact protrusion and the contact groove, and the normal direction of the butt surface is not collinear with the plug-in direction of the contact protrusion and the contact groove, so that the effect of the electric repulsion force on the insertion of the contact protrusion into the contact groove is weakened, the contact protrusion is not easy to be separated from the contact groove due to the electric repulsion force after being inserted into the contact groove, the moving contact and the static contact are stably and reliably connected, and the closing effect of the contact structure is improved;

3) the contact protrusion and the contact groove are formed in various modes and can be flexibly selected according to different requirements of actual application and working conditions;

4) the contact groove is arranged on the mounting part, the through groove is formed in the riveting connection, so that when the contact protrusion is inserted into the contact groove, the contact groove can deform and expand, a certain buffering effect is achieved, the contact protrusion is prevented from being in direct abutting contact with the contact groove to cause collision damage, the through groove enables the contact groove to have certain elasticity, the contact protrusion is tightly held, and the stability of abutting and electrical connection of the contact protrusion and the contact protrusion is improved;

5) the improved contact structure is applied to the relay, so that the relay can be closed stably and works reliably.

Drawings

FIG. 1 is a schematic diagram of a contact head structure in the prior art under stress during a closing process;

fig. 2 is a schematic cross-sectional view of a first contact structure according to embodiment 1 of the present invention;

FIG. 3 is a schematic view of the contact structure of FIG. 2 in a closed state;

fig. 4 is a schematic cross-sectional view of a second contact structure according to embodiment 2 of the present invention;

fig. 5 is a schematic cross-sectional view of a first contact structure according to embodiment 2 of the present invention;

FIG. 6 is a schematic view of the contact structure of FIG. 5 in a closed state;

FIG. 7 is a force diagram of an enlarged portion of section A of FIG. 6;

fig. 8 is a schematic sectional view of a second contact structure according to embodiment 2 of the present invention;

fig. 9 is a schematic cross-sectional view of a third contact structure according to embodiment 2 of the present invention;

fig. 10 is a schematic cross-sectional view of a fourth contact structure according to embodiment 2 of the present invention;

fig. 11 is a schematic cross-sectional view of a fifth contact structure according to embodiment 2 of the present invention;

FIG. 12 is a schematic structural view of a mounting member in embodiment 2 of the invention;

fig. 13 is a schematic cross-sectional view of a sixth contact structure according to embodiment 2 of the present invention;

fig. 14 is an internal schematic view of an overall structure of a relay according to embodiment 3 of the present invention.

Wherein the reference numerals have the following meanings:

1. a contact structure; 101. static contact; 1011. a first contact portion; 102. a moving contact; 1021. a second contact portion; 103. a contact groove; 1031. a mounting member; 10311. a through groove; 104. a contact projection; 2. a housing; 201. a base; 202. an upper cover; 3. an armature; 4. fixing the iron core; 401. abutting against the boss; 5. a coil; 6. a coil holder; 7. a support; 701. a chute; 8. a magnetically conductive panel; 9. a first flux sleeve; 10. a second flux sleeve; 11. a drive rod; 1101. an insulating sleeve; 12. an over travel spring; 13. a return spring; 14. an upper arc chute; 15. a lower arc chute; 16. and (4) arc blowing magnetic steel.

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 invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1

Referring to fig. 2 to 4, the invention discloses a contact structure 1, which comprises a fixed contact 101 and a movable contact 102, wherein the movable contact 102 is movably arranged relative to the fixed contact 101; wherein, a conductive first contact part 1011 is arranged on the static contact 101;

a conductive second contact part 1021 is arranged on the movable contact 102 corresponding to the first contact part 1011;

the movable contact 102 can be close to the stationary contact 101, and the second contact portion 1021 can be abutted against the first contact portion 1011, and the normal direction of the abutting surface of the first contact portion 1011 and the second contact portion 1021 is not collinear with the moving direction of the approaching or separating of the two.

Referring to fig. 2 to 3, when the movable contact 102 is disposed to move in a translational manner relative to the stationary contact 101, that is, a direction in which the first contact portion 1011 and the second contact portion 1021 approach or depart from each other is a moving direction G.

Therefore, through the abutting of the second contact portion 1021 on the movable contact 102 and the first contact portion 1011 on the fixed contact 101 for electrical connection, the electrical repulsion generated when the movable contact 102 and the fixed contact 101 are electrically conducted is mainly along the normal direction of the abutting surface of the first contact portion 1011 and the second contact portion 1021, and because the normal direction of the abutting surface is not collinear with the plugging direction of the first contact portion 1011 and the second contact portion 1021, so that the electrodynamic repulsion force FO generates a component force F1 in the direction perpendicular to the moving direction G, as shown in fig. 3, while the magnitude of the component force F2 in the direction opposite to the moving direction G is reduced, thereby weakening the influence of the electric repulsive force F0 on the contact of the second contact portion 1021 with the first contact portion 1011, so that the second contact portion 1021 is not easy to be opened by the electric repulsion force after contacting with the first contact portion 1011 to separate the two from the contact, the connection between the moving contact 102 and the fixed contact 101 is stable and reliable, and the closing effect of the contact structure 1 is improved.

It should be noted that, in a possible embodiment, referring to fig. 4, when the moving contact is arranged to swing in an arc relative to the stationary contact, a moving direction in which the second contact portion 1021 and the first contact portion 1011 approach or separate from each other is a tangential direction Q of a swing locus P of the moving contact 102 at a contact position of the second contact portion 1021 and the first contact portion 1011, so that a normal direction of an abutting surface of the first contact portion 1011 and the second contact portion 1021 is not collinear with a moving direction in which the first contact portion 1011 and the second contact portion 1021 approach or separate from each other means: the normal direction of the contact surface between the first contact portion 1011 and the second contact portion 1021 is not collinear with the tangential direction Q of the swing locus P of the movable contact 102 at the contact position between the two.

Referring to fig. 2-4, as a possible implementation manner, in the present embodiment, the first contact portion 1011 and the second contact portion 1021 are both rigid and wedge-shaped.

Example 2

Referring to fig. 5 to 13, the present invention discloses another contact structure 1, based on embodiment 1, the present embodiment is different from embodiment 1 in that:

one of the first contact portion 1011 and the second contact portion 1021 is configured as a contact groove 103, the other is configured as a contact protrusion 104, the structures of the contact groove 103 and the contact protrusion 104 are both supported by a conductive material, and the contact protrusion 104 can be inserted into the contact groove 103 and abut against the inner wall of the contact groove 103, so that the movable contact 102 is electrically connected with the stationary contact 101, and the normal direction of the abutting surface is not collinear with the inserting direction G of the two.

Therefore, the contact protrusion 104 on the moving contact 102 is inserted into the contact groove 103 on the fixed contact 101, the contact protrusion 104 abuts against the inner wall of the contact groove 103 to electrically connect the fixed contact 101 and the moving contact 102, and the electric repulsion generated when the moving contact 102 and the fixed contact 101 are electrically conducted is mainly along the normal direction of the abutting surface of the contact protrusion 104 and the contact groove 103, and the normal direction of the abutting surface is not collinear with the plugging direction of the contact protrusion and the contact groove 103, so that the effect of the electric repulsion on inserting the contact protrusion 104 into the contact groove 103 is weakened, the contact protrusion 104 is not easy to be separated from the contact groove 103 due to the electric repulsion after being inserted into the contact groove 103, the connection between the moving contact 102 and the fixed contact 101 is stable and reliable, and the closing effect of the contact structure 1 is improved.

Referring to fig. 5, 10 and 11, in one possible embodiment, the contact groove 103 may be disposed on the stationary contact 101, and the contact protrusion 104 is disposed on the movable contact 102.

Referring to fig. 8 and 13, alternatively, the contact groove 103 is disposed on the movable contact 102, and the contact groove 103 is disposed on the stationary contact 101.

The contact grooves 103 are provided in one-to-one correspondence with the contact protrusions 104, and one contact groove 103 is provided in a group with one contact protrusion 104.

Referring to fig. 5, 8, 10, 11, and 13, the contact grooves 103 and the contact protrusions 104 may form a plurality of sets, wherein the contact grooves 103 may be disposed on the fixed contact 101 or the movable contact 102, and the contact protrusions 104 are disposed on the movable contact 102 or the fixed contact 101, respectively.

Referring to fig. 9, alternatively, two adjacent groups are arranged in the following manner, wherein one group is upright, and the other group is inverted, and the upright position is defined as: the contact groove 103 is on the fixed contact 101, the contact protrusion 104 is on the movable contact 102, and the reverse position is opposite to the normal position, i.e. the contact protrusion 104 is on the fixed contact 101, and the contact groove 103 is on the movable contact 102.

Referring to fig. 5, 6, 8, 9, 10, 11, and 13, as a possible embodiment, at least one of the inner walls of the contact recess 103 and the surfaces of the contact protrusion 104 abutting against the inner wall of the contact recess 103 is disposed at an inclination angle to the direction in which the contact protrusion 104 is inserted into the contact recess 103.

For example, the inner wall m of the contact groove 103, the abutting surface of the contact protrusion 104 and the contact groove 103 is n, wherein the m plane forms an angle with the direction of the contact protrusion 104 inserted into the contact groove 103, and the n plane is parallel to the direction of the contact protrusion 104 inserted into the contact groove 103;

or the n surface and the direction of the contact protrusion 104 inserted in the contact groove 103 form an included angle, and the m surface is parallel to the direction of the contact protrusion 104 inserted in the contact groove 103;

referring to fig. 7, alternatively, the m-plane and the n-plane form an angle with the direction in which the contact protrusion 104 is inserted into the contact groove 103.

The normal direction of the abutting surfaces of the contact groove 103 and the contact protrusion 104 is not collinear with the plugging direction of the contact groove 103 and the contact protrusion 104, so that the influence of electric repulsion on the plugging of the contact protrusion 104 in the contact groove 103 is weakened, and the effect of contact closing is improved.

In one possible embodiment, the contact groove 103 has one of a cylindrical shape, a polygonal prism shape, a conical shape, and a polygonal pyramid shape, and the contact protrusion 104 has one of a cylindrical shape, a polygonal prism shape, a conical shape, and a polygonal pyramid shape.

Through the arrangement, the structures of the contact protrusion 104 and the contact groove 103 in the shapes can be adopted, so that the normal directions of the abutting surfaces of the contact groove 103 and the contact protrusion 104 are not collinear with the inserting direction of the contact protrusion and the contact protrusion, the influence of electric repulsion on the insertion of the contact protrusion 104 into the contact groove 103 is weakened, and the effect of contact closing is improved.

Referring to fig. 7, for example, in the present embodiment, the contact groove 103 is formed along a direction forming an included angle b with a direction in which the contact protrusion 104 is inserted into the contact groove 103;

the contact protrusion 104 is conical, and an angle b is formed between the outer peripheral surface of the contact protrusion 104 and the insertion direction of the contact protrusion 104 into the contact groove 103, so that an angle a is formed between the normal direction of the surface where the contact protrusion 104 abuts against the insertion groove and the insertion direction of the contact protrusion 104 into the contact groove 103, and a and b are complementary.

Therefore, when the movable contact 102 and the movable contact 102 are closed, the movable contact 102 moves or swings towards the movable contact 102 under the driving of an external force, so that the contact protrusion 104 is inserted into the contact groove 103, in the process that the contact protrusion 104 is inserted into the contact groove 103, the contact protrusion 104 and the contact groove 103 generate an electric repulsive force due to contact, the direction of the electric repulsive force acting on the contact protrusion 104 forms an included angle a with the direction of the contact protrusion 104 inserted into the contact groove 103, namely, F0 shown in fig. 7, the F0 is orthogonally decomposed into a component force F1 perpendicular to the insertion direction and a component force F2 parallel to the insertion direction, due to the component force F1, the effect of the electric repulsive force opposite to the insertion direction is weakened, namely, the component force F2 is reduced, the included angle a is larger, the component force F2 is weakened more obviously, and therefore, the direct front contact of the movable contact and the stationary contact in the prior art is different, the scheme of the invention changes the direction of the electric repulsion force, weakens the reverse action of the electric repulsion force on the insertion process of the contact protrusion 104, reduces the possibility that the contact protrusion 104 is ejected out of the contact groove 103 due to the generation of the electric repulsion force, improves the contact stability, and is beneficial to reducing the generation of electric arcs and limiting the outward propagation of the electric arcs, because the electric repulsion force generates electric arcs in the contact groove 103 and the contact protrusion 104 and the elastic contact piece generate electric arcs.

Referring to fig. 10, in another possible embodiment, at least one of the inner wall of contact groove 103 and the surface of contact projection 104 abutting the inner wall of contact groove 103 is a curved surface.

For example, the inner wall m of the contact groove 103 and the surface n of the contact protrusion 104 abutting the inner wall of the contact groove 103 are all provided as circular arc surfaces.

Through setting up like this, also make contact recess 103 and contact protrusion 104 butt surface's normal direction not easily realize with both grafting direction collineation, and then reach the purpose that weakens the influence of electric repulsion to contact protrusion 104 grafting in contact recess 103, improve the closed effect of contact.

Referring to fig. 5, 6, 8, 9, and 10, in one possible embodiment, the contact protrusion 104 is integrally formed with the fixed contact 101 or the movable contact 102, or, referring to fig. 11, the contact protrusion 104 is fixedly connected with the fixed contact 101 or the movable contact 102 by one or a combination of welding, screwing, and riveting.

Through the arrangement, the contact protrusion 104 and the movable contact 102 can be integrally formed in a punch forming mode, or the contact protrusion 104 is connected with the fixed contact 101 or the movable contact 102 through a welding or riveting mode, so that the contact protrusion 104 is formed on the fixed contact 101 or the movable contact 102.

Preferably, the contact protrusion 104 is riveted to the stationary contact 101 or the movable contact 102.

Further, specifically, a connecting through hole (not labeled in the figure) is formed in the moving contact 102 or the fixed contact 101, and the contact protrusion 104 is connected in the connecting through hole and is riveted and fixed with the moving contact 102 or the moving contact 102; the contact protrusion 104 is fixed in a riveting manner, so that on one hand, the fixation is stable, and the shaking between the contact protrusion 104 and the static contact 101 is reduced in the repeated contact process; on the other hand, the processing is convenient, and the shape of the contact bump 104 is convenient to be processed independently; on the other hand, due to the riveting connection, the material of the contact protrusion 104 can be selected differently from that of the static contact 101 or the moving contact 102, the material of the contact protrusion 104 can be selected according to the use requirements of impact resistance, high temperature resistance and low resistance, and the riveting connection is convenient and stable.

Preferably, the connection may be implemented by a threaded connection, that is, an internal threaded hole is formed in the fixed contact 101 or the movable contact 102, and an external threaded connector is formed on the contact protrusion 104, and is in threaded connection with the internal threaded hole through the external threaded connector.

Of course, the threaded connection between the contact protrusion 104 and the fixed contact 101 or the movable contact 102 can also be achieved by disposing the internal threaded hole on the contact protrusion 104 and disposing the external threaded connector on the fixed contact 101 or the fixed contact 101.

When the connection mode of the threaded connection member is adopted, the threaded connection member may be a screw or a bolt-nut assembly, and the contact protrusion 104 is connected with the movable contact 102 or the stationary contact 101 through the screw or the bolt-nut assembly.

Referring to fig. 5, 6, 8, 9, and 10, in one possible embodiment, the contact recess 103 is integrally formed on the static contact 101 or the moving contact 102, or, referring to fig. 13, the contact recess 103 is opened on a mounting component 1031, and the mounting component 1031 is fixedly connected to the static contact 101 or the moving contact 102 by one or a combination of welding, screwing, and riveting.

By such arrangement, the contact groove 103 may also be formed on the static contact 101 or the moving contact 102 by stamping, casting or machining, or the mounting component 1031 is provided, the contact groove 103 is formed on the mounting component 1031, and then is connected with the static contact 101 or the moving contact 102 by welding, screwing or riveting, so that the processing difficulty of the contact groove 103 can be reduced, for example, the mounting component 1031 can be processed in batch and then is connected with the static contact 101 or the moving contact 102 as required, in addition, the contact groove 103 can be designed in shape, and the material of the contact groove 103 can be adaptively selected, so that the contact groove 103 can be different from the static contact 101 or the moving contact 102, and the material of the contact groove 103 can be selected according to the use requirements of impact resistance, high temperature resistance and low resistance.

Preferably, the mounting component 1031 is riveted to the fixed contact 101 or the movable contact 102.

Through setting up like this, adopt riveted mode to connect convenient, firm, still be convenient for overhaul and maintain.

The mounting component 1031 is in threaded connection with the fixed contact 101 or the movable contact 102, which can refer to the arrangement manner of the threaded connection of the contact protrusion 104 with the fixed contact 101 or the movable contact 102.

The manner in which the mounting component 1031 is connected to the fixed contact 101 or the movable contact 102 by a threaded connection may also refer to the manner in which the contact protrusion 104 is connected to the fixed contact 101 or the movable contact 102 by a threaded connection.

Referring to fig. 11 to 13, in a possible embodiment, the contact recess 103 is disposed on an installation component 1031, the installation component 1031 is welded, riveted, screwed or fixed by a threaded connector with the movable contact 102 or the fixed contact 101, a plurality of through grooves 10311 are disposed on the installation component 1031 along the circumferential direction of the inner wall of the contact recess 103, and the through grooves 10311 extend from the end surface of the contact recess 103 to the bottom surface.

Through setting up like this for when contact protrusion 104 inserts contact recess 103, contact recess 103 can warp and expand, play certain buffering effect, avoid contact protrusion 104 and the direct butt contact of contact recess 103 and collision damage, and lead to groove 10311 and make contact recess 103 have certain elasticity, have the effect of holding tightly to contact protrusion 104, improve both butts and electric connection's stability, when contact protrusion 104 breaks away from contact recess 103, contact recess 103 inner wall kick-backs and resets.

In one possible embodiment, the through slots 10311 are straight or spiral arcs.

Through setting up like this, adopt two kinds of forms to lead to groove 10311, the homoenergetic makes contact recess 103 have certain elastic deformation and from resilience performance, from this for contact recess 103 can cushion and contact protrusion 104's contact, and play the effect of hugging closely to contact protrusion 104.

Referring to fig. 12, in the present embodiment, the mounting component 1031 is cylindrical, and the through groove 10311 is formed on the inner wall of the contact recess 103 along the bus bar direction of the mounting component 1031.

Referring to fig. 5 to 7, in a possible embodiment, the contact recess 103 is a cylindrical blind groove or through groove 10311, after the contact protrusion 104 is inserted into the contact recess 103, a gap exists between an end surface of the contact protrusion 104 and a bottom of the contact recess 103, and the elastic contact is abutted against an outer circumferential surface of the contact protrusion 104.

Further, as a preferable aspect, the height H of the contact protrusion 104 is smaller than the depth H of the contact groove 103; the purpose of the arrangement is to keep the distance between the end of the contact protrusion 104 and the bottom of the contact groove 103, avoid the damage of both sides caused by the collision between the end of the contact protrusion 104 and the bottom of the contact groove 103, protect the contact protrusion 104 and the contact groove 103, prolong the service life of the contact structure 1, and avoid the influence on the connection tightness between the moving contact 102 and the static contact 101 caused by the electric repulsion generated by the contact between the contact protrusion 104 and the bottom of the contact groove 103.

Referring to fig. 7, further, when the contact protrusion 104 is inserted into the contact groove 103 and abuts against the inner wall of the contact groove 103, the surface of the movable contact 102 maintains a gap s with the surface of the stationary contact 101.

Through the arrangement, the electric repulsion generated in the conductive process of the moving contact 102 and the static contact 101 is mainly formed at the connecting position of the contact protrusion 104 and the contact groove 103, so that the direct formation of the electric repulsion on the surfaces of the moving contact 102 and the static contact 101 is avoided, and the connection stability is improved.

Example 3

Referring to fig. 14, the present embodiment discloses a relay, which includes a housing 2, and a contact structure 1 in any one of the above embodiments 1 and 2 is disposed in the housing 2.

Further, in this embodiment, the housing 2 includes a base 201 and an upper cover 202, the upper cover 202 is connected to the base 201, and a containing cavity (not labeled in the figure) is formed in the upper cover 202 and the base 201, the relay further includes an armature 3 disposed in the containing cavity, a fixed iron core 4, and a coil 5, wherein the coil 5 is wound on a coil 5 seat, a non-magnetic bracket 7 is disposed at the center of the coil 5 seat, a sliding slot 701 for the armature 3 to slide is disposed in the bracket 7, an opening (not labeled in the figure) communicated with the sliding slot 701 is disposed at one end of the bracket 7, the opening is disposed vertically upward, the fixed iron core 4 is columnar and fixed at the opening of the bracket 7, and is fixed with the upper end of the coil 5 seat through a magnetic conductive panel 8.

The bracket 7 is externally sleeved with a first magnetic conductive sleeve 9 which is magnetic conductive, the bottom of the coil 5 seat is connected with a second magnetic conductive sleeve 10, one end of the second magnetic conductive sleeve 10 extends from the edge to the center from the horizontal direction to be connected with the first magnetic conductive sleeve 9, and the other end extends upwards from the bottom to the top to be connected with the magnetic conductive panel 8, so that the first magnetic conductive sleeve 9, the second magnetic conductive sleeve 10 and the magnetic conductive panel 8 form a continuous magnetic loop.

A through hole (not labeled in the figure) is formed in the center of the fixed iron core 4, a driving rod 11 is slidably inserted in the through hole, the armature 3 is also cylindrical and fixed with one end of the driving rod 11, and the other end of the driving rod 11 is provided with a movable contact 102 in the contact head structure 1.

An overtravel spring 12 and a return spring 13 are further sleeved on the driving rod 11, wherein the moving contact 102 is slidably disposed on the driving rod 11, an insulating sleeve 1101 is fixed on the driving rod 11, the insulating sleeve 1101 slides along a through hole, one end of the overtravel spring 12 abuts against the end of the insulating sleeve 1101, and the other end of the overtravel spring abuts against the moving contact 102 in the contact structure 1.

The inner wall of the fixed iron core 4 is further provided with an abutting boss 401, one end of the return spring 13 abuts against the abutting boss 401, and the other end abuts against the armature 3.

The fixed contact 101 is fixed with the upper cover 202, wherein an upper arc-extinguishing chamber 14 is further embedded and sleeved on the inner side of the upper cover 202, a lower arc-extinguishing chamber 15 is further arranged between the lower end of the upper arc-extinguishing chamber 14 and the magnetic conductive panel 8, and a sealed arc-extinguishing chamber (not marked in the figure) is formed by butt joint between the upper arc-extinguishing chamber 14 and the lower arc-extinguishing chamber 15.

The upper arc-extinguishing cover 14 is provided with a clamping hole (not labeled in the figure) for connecting the static contact 101, the static contact 101 is fixed by the top of the upper cover 202 through the clamping hole and extends into the arc-extinguishing chamber, and the slot structure and the plug structure are arranged oppositely.

And arc-blowing magnetic steels 16 are also arranged on two sides of the arc-extinguishing chamber, and the arc-blowing magnetic steels 16 are fixed on the upper cover 202.

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

when the coil 5 is powered on, the coil 5 generates magnetic force to magnetize the fixed iron core 4, and since the magnetic circuit tends to be in a closed state, the fixed iron core 4 attracts the armature 3 to move upwards until the magnetic circuit is closed, that is, the armature 3, the fixed iron core 4, the first flux sleeve 9, the second flux sleeve 10 and the flux-conducting panel 8 form a closed magnetic circuit, so that the movable contact 102 moves towards the direction close to the fixed contact 101, by using the contact head structure 1 of the above embodiment 1 or 2, the movable contact 102 and the fixed contact 101 are stably connected, and the generated electric arc is less and is mainly located in the slot structure, and the external current flows out from the fixed contact 101 on one side through the movable contact 102 and then flows out from the fixed contact 101 on the other side.

After the moving contact 102 is connected with the fixed contact 101, the driving rod 11 continues to move forward for a certain distance, so that the over travel spring 12 is pressed, and the over travel spring 12 generates elastic force to press the moving contact 102, so that the moving contact 102 and the fixed contact 101 are kept stably closed.

After the coil 5 loses power, the return spring 13 applies a return elastic force to the armature 3, so that the armature 3 moves towards a direction away from the fixed iron core 4 until the movable contact 102 is separated from the fixed contact 101.

In summary, the contact structure 1 and the relay provided by the invention weaken the influence of the electric repulsion on the closing of the moving contact 101 and the static contact 101, improve the tightness of the electrical connection between the moving contact 102 and the static contact 101 after the closing, stabilize the closing state of the contact structure 1, and improve the stability and reliability of the relay.

The technical means disclosed in the invention 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 (10)

1. A contact structure, comprising:

a fixed contact (101) on which a conductive first contact part (1011) is arranged; and

a movable contact (102) which is movably arranged relative to the fixed contact (101) and is provided with a conductive second contact part (1021);

the movable contact (102) can be close to the fixed contact (101), the second contact part (1021) can be abutted against the first contact part (1011), and the normal direction of the abutting surface of the first contact part (1011) and the second contact part (1021) is not collinear with the moving direction of the contact parts.

2. The contact structure according to claim 1, characterized in that the first contact portion (1011) and the second contact portion (1021) are both rigid and wedge-shaped.

3. The contact structure according to claim 1, wherein one of the first contact portion (1011) and the second contact portion (1021) is configured as a contact groove (103), and the other one is configured as a contact protrusion (104), the contact protrusion (104) can be inserted into the contact groove (103) and abut against an inner wall of the contact groove (103), so that the movable contact (102) and the fixed contact (101) are electrically connected, and a normal direction of an abutting surface is not collinear with an inserting direction of the two.

4. A contact structure according to claim 3, characterized in that at least one of the inner wall of the contact recess (103), the surface of the contact projection (104) abutting the inner wall of the contact recess (103) is arranged at an angle to the direction in which the contact projection (104) is inserted into the contact recess (103).

5. The contact structure according to claim 4, wherein the contact groove (103) is one of cylindrical, polygonal prismatic, conical, and polygonal pyramidal, and the contact protrusion (104) is one of cylindrical, polygonal prismatic, conical, and polygonal pyramidal.

6. A contact structure according to claim 3 or 4, characterized in that at least one of the inner wall of the contact groove (103) and the surface of the contact projection (104) abutting the inner wall of the contact groove (103) is a cambered surface.

7. The contact structure according to claim 3 or 4, wherein the contact protrusion (104) is integrally formed with the stationary contact (101) or the movable contact (102), or the contact protrusion (104) is fixedly connected with the stationary contact (101) or the movable contact (102) by one or more of welding, screwing and riveting.

8. The contact structure according to claim 3 or 4, wherein the contact groove (103) is integrally formed on the stationary contact (101) or the movable contact (102), or the contact groove (103) is opened on a mounting component (1031), and the mounting component (1031) is fixedly connected with the stationary contact (101) or the movable contact (102) by one or a combination of welding, screwing and riveting.

9. The contact structure according to claim 8, wherein the contact recess (103) is opened on a mounting member (1031), the mounting member (1031) is fixed to the movable contact (102) or the stationary contact (101), a plurality of through grooves (10311) are formed in the mounting member (1031) along a circumferential direction of an inner wall of the contact recess (103), and the through grooves (10311) extend from an end surface of the contact recess (103) to a bottom surface.

10. A relay, characterized in that it comprises a contact arrangement according to any one of claims 1-9.

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