CN216957910U - Movable contact spring and relay comprising same - Google Patents

Abstract

The utility model discloses a movable reed and a relay comprising the same, and relates to the technical field of relay structures, wherein the movable reed comprises a fixed end which is used for being connected with a yoke; the movable end at least comprises a first mounting part connected with the first deformation part and a movable part which is connected with the first mounting part and can elastically deform, the first mounting part is used for mounting a movable contact, and the movable part is used for connecting an armature; the elastic coefficient of the first deformation part is smaller than that of the movable part, and the elastic coefficient of the movable part is increased along with the reduction of the distance between the armature and the polar surface of the electromagnetic iron core. The movable spring and the relay adopting the movable spring have the advantages of strong short circuit resistance and stable and reliable use.

Description

Movable contact spring and relay comprising same

Technical Field

The utility model relates to the technical field of relay structures, in particular to a movable spring and a relay comprising the movable spring.

Background

At present, in the relay field, a clapper relay is a more commonly used one, and a common clapper relay generally includes an electromagnetic core, a yoke, an armature, a movable reed, a moving contact and a stationary contact, wherein the movable reed is an important component of the clapper relay, the movable reed is mainly used for connecting the yoke and the armature, and when the armature acts under the electromagnetic attraction effect of the electromagnetic core, the movable reed elastically deforms under the driving of the armature, and the movable contact arranged on the movable reed swings to close with the stationary contact, thereby realizing the contact closing action of the clapper relay.

Because the process of closing the movable contact and the fixed contact is mainly realized by attracting the iron core through the electromagnetic iron core, and before the movable contact and the fixed contact are closed, the armature and the electromagnetic iron core are far away from each other, so the electromagnetic attraction between the armature and the electromagnetic iron core is weak, and the design rigidity of the movable spring is required to be small, otherwise, the armature cannot be attracted due to the fact that the electromagnetic iron core cannot provide enough electromagnetic attraction, namely, the relay cannot realize the contact closing action.

However, if the design rigidity of the movable contact is low, an electric repulsive force is generated between the movable contact and the stationary contact when a fault short-circuit current occurs, and the movable spring is easily elastically deformed by the electric repulsive force to separate the movable contact and the stationary contact, thereby affecting the stability of the contact between the movable contact and the stationary contact.

Along with the rapid development of the automobile industry, the requirements of various automobile factories and battery pack factories on fault short-circuit current are higher and higher, and on the basis of keeping the characteristics of small volume and small coil power, the direct-current relay is required to have a short-circuit resistance function and resist the electric repulsion force applied to a movable spring when a system has a fault large current; however, the dc relay in the prior art cannot provide enough contact pressure under the characteristics of small volume and small coil power, that is, the contact pressure is not enough to resist the electric repulsion force applied to the moving contact, so that it is difficult to meet the market requirement.

Therefore, the present application aims to provide a movable spring to improve the stability of the closing of the movable contact and the stationary contact in the relay in the prior art.

SUMMERY OF THE UTILITY MODEL

In order to overcome at least one of the defects of the prior art, the utility model provides the movable spring to optimize the defect that the rigidity design of the existing movable spring is not reasonable enough to cause unstable contact closing.

Another object of the present invention is to provide a relay to optimize the disadvantage of unstable contact closure caused by the unreasonable design of the stiffness of the movable spring in the existing 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 movable spring plate, comprising a fixed end for coupling with a yoke; the movable end at least comprises a first installation part connected with the first deformation part and a movable part which is connected with the first installation part and can generate elastic deformation, the first installation part is used for installing a movable contact, and the movable part is used for connecting an armature; the elastic coefficient of the first deformation part is smaller than that of the movable part, and the elastic coefficient of the movable part is increased along with the reduction of the distance between the armature and the polar surface of the electromagnetic iron core.

Therefore, in the action process of closing the relay contact, the armature is close to the polar surface of the electromagnetic core under the action of the electromagnetic attraction of the polar surface of the electromagnetic core, so that the distance between the armature and the polar surface is gradually reduced, and because the elastic coefficient of the first deformation part is smaller than that of the movable part, the first deformation part preferentially elastically deforms before the movable part at the initial stage of attracting the armature to move by the electromagnetic core, the rigid design of the first deformation part is smaller, so that the armature can move under the smaller electromagnetic attraction, the magnetic attraction between the armature and the electromagnetic core is continuously increased along with the continuous reduction of the distance between the armature and the electromagnetic core, after the contact is closed, the movement of the armature drives the movable part to elastically deform in the process of overtravel movement of the armature, and in the process of the elastic deformation of the movable part, because the elastic coefficient of the movable part is increased along with the reduction of the distance between the armature and the electromagnetic core, therefore, along with the continuous reduction of the distance between the armature and the polar surface of the electromagnetic core, the driving force required by the elastic deformation of the movable part is driven to be continuously increased, namely the rigidity of the movable part is continuously increased, and because the electromagnetic attraction between the armature and the electromagnetic core is continuously increased in the overtravel process, the elastic deformation resistance of the movable part can be overcome, so that the movable part can be elastically deformed in the overtravel process of the armature until the armature is contacted with the polar surface of the electromagnetic core, at the moment, compared with the structure in the prior art, the movable spring plate adopting the application has the advantages that the rigidity after the contact is closed is obviously increased, the electric repulsion generated by short circuit can be resisted, the stability of the contact closure is improved, in addition, because the rigidity of the gradual increase of the movable spring plate, the armature closure is smooth, and after the armature is contacted with the electromagnetic core, the abutting pressure force provided by the movable spring plate to the contact is close to the electromagnetic attraction between the armature and the electromagnetic core, the improvement greatly improves the contact pressure, thereby improving the short-circuit resistance of the relay and meeting the requirement of practical application.

Further, the sectional area of the movable portion is gradually reduced or gradually increased in a direction approaching the first mounting portion.

Furthermore, the movable part is in a trapezoid shape or an inverted trapezoid shape.

Further, the two sides of the movable part are transited through circular arcs.

Furthermore, the movable part is provided with a through groove at one end close to the first mounting part, and one end of the through groove close to the armature is smaller than or larger than one end close to the first mounting part.

Further, the through groove is an inverted trapezoidal groove or a trapezoidal groove.

Furthermore, the movable part comprises a second installation part and a movable deformation part, the armature is installed on the second installation part, a second deformation part is arranged between the second installation part and the first installation part, the movable deformation part is connected with the second installation part, and in the process that the distance between the armature and the polar surface of the electromagnetic iron core is reduced, the movable deformation part can abut against the first installation part and/or the movable contact and elastically deform.

According to another aspect of the present invention, there is provided a relay including: the electromagnetic iron core is externally wound with a coil; any one of the above movable spring pieces; the movable contact is arranged on the movable spring piece; the fixed contact is arranged corresponding to the movable contact; one end of the yoke is connected with the polar surface at one end of the electromagnetic iron core, and the other end of the yoke is connected with a movable reed; and the armature is connected with the movable spring, and when the armature is attracted by the polar surface at the other end of the electromagnet core, the armature can drive the movable spring to elastically deform so as to close the movable contact and the fixed contact.

Therefore, the improved movable spring is adopted, in the closing process of the relay, the rigidity of the movable spring is smaller at the initial stage of closing the armature and the electromagnetic iron core, and in the process that the armature is gradually close to the polar surface of the electromagnetic iron core, the rigidity of the movable spring is gradually increased, and finally the elastic counter force applied by the movable spring to the static contact can approach the electromagnetic attraction between the armature and the electromagnetic iron core, so that the smooth closing of the relay contact is realized, and the short circuit resistance of the relay contact is improved.

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

1) the movable spring is set to be multi-section deformed, the rigidity of the movable spring is adjusted along with the reduction of the distance between the armature and the polar surface of the electromagnetic iron core, specifically, the rigidity is gradually increased or increased in sections, therefore, on the basis of the characteristics of small holding volume and small coil power, the contact can be smoothly closed, and the short circuit resistance of the contact after the contact can be improved;

2) the utility model provides a relay, adopt the movable contact spring after the improvement, can realize that the contact closure is smooth and easy to can effectively improve relay's anti short circuit ability.

Drawings

FIG. 1 is a schematic three-dimensional structure diagram of a movable spring according to an embodiment of the present invention;

FIG. 2 is a schematic plan view of a movable spring according to an embodiment of the present invention;

FIG. 3 is a schematic three-dimensional structure of a movable spring according to another embodiment of the present invention;

FIG. 4 is a schematic plan view of a movable spring plate according to another embodiment of the present invention;

fig. 5 is a schematic diagram of the situation that the movable spring according to one embodiment of the present invention and the movable spring according to the prior art generate an elastic reaction force during the action of the armature and the situation that the magnetic force between the armature and the electromagnetic core is generated;

FIG. 6 is a schematic three-dimensional structure of a movable spring according to still another embodiment of the present invention;

FIG. 7 is a schematic three-dimensional structure of a movable spring according to another embodiment of the present invention;

fig. 8 is a schematic diagram of the situation that the movable spring according to another embodiment of the present invention and the movable spring according to the prior art generate an elastic reaction force during the armature action and the situation that the magnetic force between the armature and the electromagnetic core is generated;

FIG. 9 is a schematic three-dimensional structure diagram of a relay according to an embodiment of the utility model;

FIG. 10 is a first diagram illustrating a state of a relay according to an embodiment of the present invention;

FIG. 11 is a second schematic diagram of a state of a relay according to an embodiment of the present invention;

FIG. 12 is a third schematic diagram of a state of a relay according to an embodiment of the utility model;

fig. 13 is a fourth schematic diagram of a state of a relay according to an embodiment of the utility model.

Wherein the reference numerals have the following meanings:

1. a movable reed; 11. a fixed end; 12. a movable end; 121. a first mounting portion; 122. a movable portion; 1221. a second mounting portion; 12211. a process tank; 1222. a movable deformation portion; 1223. a second deformation portion; 13. a first deformation portion; 14. a through groove; 2. an electromagnetic core; 21. a coil; 3. a movable contact; 31. a movable touch plate; 4. a stationary contact; 5. a yoke; 6. an armature.

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 4, 6 to 7, and 9, the present invention discloses a movable spring plate 1, which includes a fixed end 11 and a movable end 12, wherein the fixed end is used for connecting with a yoke 5;

a first deformation part 13 is arranged between the fixed end 11 and the movable end 12, the movable end 12 at least comprises a first mounting part 121 connected with the first deformation part 13 and a movable part 122 connected with the first mounting part 121 and capable of elastic deformation, the first mounting part 121 is used for mounting the movable contact 3, and the movable part 122 is used for connecting the armature 6.

The elastic coefficient of the first deformation portion 13 is smaller than that of the movable portion 122, and the elastic coefficient of the movable portion 122 increases as the distance between the armature 6 and the polar surface of the electromagnetic core 2 decreases.

Therefore, during the action of closing the relay contact, the armature 6 is close to the polar surface of the electromagnetic core 2 under the action of the electromagnetic attraction force of the polar surface of the electromagnetic core 2, so that the distance between the two is gradually reduced, and because the elastic coefficient of the first deformation part 13 is smaller than that of the movable part 122, at the initial stage of the movement of attracting the armature 6 by the electromagnetic core 2, the first deformation part 13 is elastically deformed in preference to the movable part 122, the rigid design of the first deformation part 13 is smaller, so that the armature 6 can move under the smaller electromagnetic attraction force, the magnetic attraction force between the armature 6 and the electromagnetic core 2 is continuously increased along with the continuous reduction of the distance between the armature 6 and the electromagnetic core 2, after the contact is closed, the movement of the armature 6 drives the movable part 122 to elastically deform during the overtravel movement of the armature 6, and during the elastic deformation of the movable part 122, because the elastic coefficient of the movable part 122 increases with the decrease of the distance between the armature 6 and the electromagnetic core 2, the driving force required by the elastic deformation of the movable part 122 is driven to increase continuously with the decrease of the distance between the armature 6 and the polar surface of the electromagnetic core 2, that is, the rigidity of the movable part 122 increases continuously, and because the electromagnetic attraction between the armature 6 and the electromagnetic core 2 increases continuously during the overtravel process, the elastic deformation resistance of the movable part 122 can be overcome, therefore, the movable part 122 can elastically deform during the overtravel process of the armature 6 until the armature 6 contacts with the polar surface of the electromagnetic core 2, at this time, compared with the structure in the prior art, by adopting the movable spring 1 of the present application, the rigidity after the contact is closed is obviously increased, the electric repulsion generated by the short circuit can be resisted, the stability of the contact closure is improved, and in addition, because the rigidity of the movable spring 1 is gradually increased, make armature 6 closed smooth and easy and make armature 6 and electromagnetic core 2 contact the back, the pressure that supports that movable spring 1 provided to the contact approaches to armature 6 and electromagnetic core 2 electromagnetic attraction each other, improves and greatly improves contact pressure to make the anti short circuit ability of relay promote, in order to satisfy practical application's needs.

It should be noted that the movable contact 3 may be directly disposed on the first mounting portion 121, or the movable contact 3 may be disposed on a movable contact plate 31, and then the movable contact plate 31 is mounted on the first mounting portion 121.

Further, in the process of continuously decreasing the distance between the armature 6 and the polar surface of the electromagnetic core 2, the elastic coefficient of the movable portion 122 may be uniformly or non-uniformly increased, or may be increased and maintained at a constant value, and then increased and maintained at another constant value, or may be uniformly or non-uniformly increased and then maintained at a constant value.

Referring to fig. 1 to 2, in some possible embodiments, the cross-sectional area of the movable portion 122 is gradually reduced in a direction approaching the first mounting portion 121.

That is, the sectional area of the end of the movable portion 122 fixed to the armature 6 is larger than the sectional area of the end of the movable portion 122 connected to the first mounting portion 121.

The sectional area is a longitudinal sectional area perpendicular to the plate surface of the movable end 12, and the width of the end fixed to the armature 6 is larger than the width of the end of the movable portion 122 connected to the first mounting portion 121, as viewed in the direction perpendicular to the plate surface of the movable portion 122.

In the present application, the movable portion 122 has a trapezoidal shape as a whole, in which a sectional area of the movable portion 122 on the first mounting portion 121 side is smaller than a sectional area on the side fixed to the armature 6.

In this way, by gradually changing the cross-sectional area of the movable portion 122, the elastic coefficient of the movable portion 122 gradually increases during the process of being deformed by the tensile force of the armature 6, so as to achieve the effect of gradually increasing the rigidity of the movable portion 122, that is, the effect of gradually increasing the rigidity of the movable spring 1.

Further, since the sectional area of the end of the movable portion 122 remote from the first mounting portion 121 is gradually increased, a sufficient mounting space for the armature 6 can be provided.

For example, the armature 6 and the movable spring 1 are commonly connected in a riveting manner, and a riveting hole (not labeled in the drawing) can be formed in the movable portion 122 due to a large area, so that when at least two riveting holes are used, a sufficient distance can be formed between the riveting holes for subsequent riveting installation, and the situation that the riveting position of the armature 6 is subjected to a large stress to cause damage after installation is avoided.

In some possible embodiments, the movable portion 122 has a trapezoidal shape.

Of course, the movable portion 122 may also be triangular-like.

Of course, in other possible embodiments, the sectional area of the movable portion 122 gradually increases in a direction approaching the first mounting portion 121.

That is, the sectional area of the end of the movable portion 122 fixed to the armature 6 is smaller than the sectional area of the end of the movable portion 122 connected to the first mounting portion 121.

In some possible embodiments, the movable portion 122 has an inverted trapezoidal shape.

Of course, the movable portion 122 may also be shaped like an inverted triangle.

Further, both sides of the movable portion 122 are transited by a circular arc.

With such a structural arrangement, the movable portion 122 has better smoothness in the process of elastic deformation, is less prone to breakage, and can more easily achieve uneven change in rigidity of the movable portion 122.

Referring to fig. 3 and 4, in some possible embodiments, the movable portion 122 has a through slot 14 formed at an end close to the first mounting portion 121, and an end of the through slot 14 close to the armature 6 is smaller than an end close to the first mounting portion 121.

With such a structural arrangement, the sectional area of the movable portion 122 is made to gradually decrease in a direction approaching the first mounting portion 121, that is, the sectional area of the end of the movable portion 122 fixed to the armature 6 is larger than the sectional area of the movable portion 122 connected to the first mounting portion 121.

Further, in some possible embodiments, the through slot 14 is an inverted trapezoidal slot.

Of course, the through slots 14 may also be inverted triangular slots.

In some possible embodiments, in other possible embodiments, the end of the through slot 14 closer to the armature 6 is greater than the end closer to the first mounting portion 121.

Further, in some possible embodiments, the through slot 14 is a trapezoidal slot.

Of course, the through slots 14 may also be triangular slots.

As shown in the test result graph of fig. 5, a line a indicates a variation of the electromagnetic attraction force between the armature 6 and the iron core according to a change of the moving stroke of the armature 6, a line b indicates a variation of the elastic reaction force generated by the conventional movable spring 1 according to the related art according to a change of the moving stroke of the armature 6, and a line c indicates a variation of the elastic reaction force generated by the above two movable springs 1 according to the embodiment of the present invention according to a change of the moving stroke of the armature 6.

Wherein, the node M is a contact closing position, the section of 0-M before the node M is at the initial closing stage of the armature 6, the node M is a process of overtravel movement of the armature 6 after the contact is closed, and the node N is the position of the armature 6 when the armature 6 contacts with the polar surface of the electromagnetic iron core 2; f1 is the electromagnetic attraction between the armature 6 and the electromagnetic core 2 after the contact between the two polar surfaces, F2 is the final elastic reaction force that can be provided by the movable spring plate 1 in the prior art, and F3 is the final elastic reaction force that can be provided by the movable spring plate 1 in the present application.

As can be seen, F1 > F3 > F2, and the slope of line c gradually increases and eventually maintains a substantially constant value in the interval M N.

Through the above gradual change setting of the cross section of the movable part 122, thereby in the process that the polar surface distance between the armature 6 and the electromagnet core 2 is reduced, the elastic coefficient (the slope of the line c) of the movable part 122 can be a trend of increasing change, that is, the overall rigidity of the movable spring leaf 1 is changed in an increasing way, and further the elastic counterforce generated by the movable spring leaf 1 can finally approach to the mutual attraction between the armature 6 and the electromagnet core 2, thereby improving the pressure resistance after the contact is closed, and because the rigidity of the movable spring leaf 1 is increased, elastic deformation is not easy to occur under the action of electric repulsion, and the short-circuit resistance of the relay using the movable spring leaf 1 is also improved.

Example 2

Referring to fig. 6 to 7 and fig. 9 to 13, the present invention discloses another movable spring 1, which is based on embodiment 1 and is different from embodiment 1 in that:

the movable portion 122 includes a second mounting portion 1221 and a movable deformation portion 1222, the armature 6 is mounted on the second mounting portion 1221, a second deformation portion 1223 is disposed between the second mounting portion 1221 and the first mounting portion 121, the movable deformation portion 1222 is connected to the second mounting portion 1221, and in the process of reducing the distance between the armature 6 and the polar surface of the electromagnetic core 2, the movable deformation portion 1222 can abut against the first mounting portion 121 and/or the movable contact 3 and elastically deform.

Thus, in the process in which the armature 6 is gradually brought close to the polar surface of the electromagnetic core 2 by the electromagnetic attraction of the electromagnetic core 2, the first deformation portion 13 is first deformed; after the contacts are closed, the second deforming part 1223 in the movable part 122 is preferentially elastically deformed and drives the movable deforming part 1222 to approach the first mounting part 121 or the movable contact 3 until the movable deforming part 1222 abuts against the first mounting part 121 and/or the movable contact 3, and in the process that the armature 6 continues to approach the polar surface of the electromagnetic core 2, the movable deforming part 1222 is elastically deformed along with the second mounting part 1221, so that the elastic coefficient of the movable part 122 is increased until the armature 6 contacts with the polar surface of the electromagnetic core 2.

By adopting the structure, the elastic coefficient of the movable part 122 is increased in a sectional manner, namely, the second deformation part 1223 deforms first, and then the movable deformation part 1222 deforms along with the second deformation part 1223, similarly, in the process that the distance between the armature 6 and the polar surface of the electromagnetic core 2 is continuously reduced, the elastic coefficient of the movable part 122 can be increased, namely, the rigidity of the movable spring piece 1 is increased, so that the elastic counterforce of the movable spring piece 1 in the final state is increased, and the movable spring piece can approach to the mutual attraction between the armature 6 and the electromagnetic core 2, thereby improving the resisting force after the contact is closed, and because the rigidity of the movable spring piece 1 is increased, the movable spring piece is not easy to elastically deform under the action of electric repulsion, and the short-circuit resistance performance of the relay using the movable spring piece 1 is also improved.

Further specifically, referring to fig. 6, in some possible embodiments, the movable deformation portion 1222 is formed on the second mounting portion 1221 by stamping or laser cutting, a stamped or cut process groove 12211 is formed on the second mounting portion 1221, the process groove 12211 extends from the end of the first mounting portion 121 to the direction of the second mounting portion 1221, and in a normal state, one end of the movable deformation portion 1222 is located in the process groove 12211, and the other end is in a movable state and is located outside the process groove 12211.

Of course, the movable deformation portion 1222 may be fixed to the second mounting portion 1221 by, but not limited to, welding or riveting.

Referring to fig. 6, 11, and 12, after the second deformation portion 1223 deforms, the movable deformation portion 1222 is driven to move toward the second mounting portion 1221 until the movable deformation portion 1222 is embedded in the process groove 12211, and as the armature 6 moves down, the movable deformation portion 1222 presses against the movable contact plate 31 or the movable contact 3, and as the second deformation portion 1223 continues to elastically deform.

As shown in the test result graph of fig. 8, line a indicates a variation in electromagnetic attraction force between the armature 6 and the iron core as the moving stroke of the armature 6 changes, line b indicates a variation in elastic reaction force generated by the movable spring 1 in the conventional art as the moving stroke of the armature 6 changes, and line c indicates a variation in elastic reaction force generated by the movable spring 1 in the embodiment of the present invention as the moving stroke of the armature 6 changes.

The node M is a contact closing position, the section of 0 to M before the node M is at an initial closing stage of the armature 6, the section after the node M is a process of performing over travel movement on the armature 6 after the contact is closed, the node N is a polar surface contact of the armature 6 and the electromagnetic core 2, F1 is an electromagnetic attraction between the armature 6 and the electromagnetic core 2 after the armature 6 is in the polar surface contact, F2 is an elastic counterforce that can be finally provided by the movable spring 1 in the prior art, and F3 is an elastic counterforce that can be finally provided by the movable spring 1 in the application.

As can be seen from the figure, F1 > F3 > F2, and the slope of the line c increases stepwise in the interval from M to N, that is, in the interval from M to P, the second deformation portion 1223 elastically deforms, the curvature of the line increases to substantially one constant value, in the interval from P to N, the third deformation portion elastically deforms, the curvature of the line increases to substantially another constant value, and finally, the line is maintained stable until the polar surfaces of the armature 6 and the electromagnet core 2 close.

Through the structural arrangement of the movable portion 122, in the process of reducing the polar surface distance between the armature 6 and the electromagnet core 2, the elastic coefficient (the slope of the line c) of the movable portion 122 can have a changing trend of increasing in a sectional manner, that is, the rigidity of the movable spring 1 as a whole changes in a sectional manner.

Through the embodiment of the utility model, the elastic counter force generated by the movable spring piece 1 can finally approach the mutual attraction between the armature 6 and the electromagnetic iron core 2, so that the resisting pressure after the contact is closed is improved, and the movable spring piece 1 is not easy to elastically deform under the action of electric repulsion because the rigidity of the movable spring piece 1 is increased, namely the short-circuit resistance of the relay using the movable spring piece 1 is improved.

Referring to fig. 7, in other possible embodiments, the process groove 12211 is formed at least one of left and right sides of the second mounting portion 1221 such that the movable deformation portion 1222 is located between the second mounting portion 1221 and the second mounting portion 1221, and at least one of left and right sides of the second mounting portion 1221.

The left and right sides are sides perpendicular to the surface of the second mounting portion 1221.

This is another implementation manner in which the rigidity change of the movable portion 122 is segmented, and the action process and principle thereof are consistent with the segmented scheme in the above embodiment, and therefore, the detailed description thereof is omitted.

Example 3

Referring to fig. 9 to 13, the present invention discloses a relay, including: the electromagnetic contactor comprises an electromagnetic iron core 2, a movable spring piece 1, a movable contact 3, a fixed contact 4, a yoke iron 5 and an armature 6.

Wherein, the electromagnetic iron core 2 is externally wound with a coil 21; the movable spring piece 1 adopts any one movable spring piece 1 in the embodiments 1-2; the movable contact 3 is arranged on the movable spring piece 1, and further specifically, in the application, the movable contact 3 is arranged on a movable contact plate 31 and is fixedly connected with the movable spring piece 1 through the movable contact plate 31; the fixed contact 4 is arranged corresponding to the movable contact 3 and can be closed with the movable contact 3 or disconnected with the movable contact 3; one end of the yoke iron 5 is connected with the polar surface at one end of the electromagnetic iron core 2, and the other end of the yoke iron 5 is connected with the movable spring leaf 1; the armature 6 is connected with the movable contact spring 1, and when the armature 6 is attracted by the polar surface at the other end of the electromagnet core 2, the armature 6 can drive the movable contact spring 1 to elastically deform so as to close the movable contact 3 and the fixed contact 4.

Therefore, the improved movable spring piece 1 is adopted, in the closing process of the relay, the rigidity of the movable spring piece 1 at the initial stage of closing the armature 6 and the electromagnetic iron core 2 is smaller, and in the process that the armature 6 is gradually close to the polar surface of the electromagnetic iron core 2, the rigidity of the movable spring piece 1 is gradually increased, and finally the elastic counter force applied to the static contact 4 by the movable spring piece 1 can approach the electromagnetic attraction between the armature 6 and the electromagnetic iron core 2, so that the smooth closing of the relay contact is realized, and the short circuit resistance of the relay contact is improved.

This embodiment takes the first movable spring piece 1 in embodiment 2 as an example, and explains the improved action process and principle:

when the relay receives the electric signal for triggering, the coil 21 is electrified, the electromagnetic iron core 2 generates electromagnetic attraction force on the armature 6, so that the armature 6 is displaced, as shown in fig. 8 and 10, before the contact is closed, namely in the interval of 0-M, the electromagnetic action force generated by the electromagnetic iron core 2 on the armature 6 is smaller and the increasing speed is slower, therefore, in the process, only the first deformation part 13 of the movable spring piece 1 is elastically deformed;

as shown in fig. 11, at point M, the moving contact 3 contacts with the fixed contact 4 to achieve contact closing, at this time, there is still a gap between the armature 6 and the polar surface of the electromagnetic core 2, and the electromagnetic core 2 continues to attract the armature 6 to drive the armature 6 to move to achieve over travel;

as shown in fig. 12, in the interval M to P, only the second deforming part 1223 is elastically deformed, and the movable deforming part 1222 gradually approaches to the movable contact plate 31 until being embedded in the process groove 12211 and abutting against the movable contact plate 31;

as shown in fig. 13, in the interval P to M, the third deformation portion is elastically deformed to generate an elastic reaction force until the armature 6 comes into contact with the polar surface of the electromagnetic core 2, and the final holding operation of closing the relay contact is completed.

Therefore, the rigidity change of the movable spring piece 1 is adaptively increased along with the displacement of the armature 6, the abutting force between the contacts is improved, the contact is enhanced to resist larger electric repulsion force generated by short-circuit current, and the integral short-circuit resistance of the relay is also improved.

In summary, the movable spring plate 1 and the relay using the movable spring plate 1 provided by the utility model have the advantages of strong short circuit resistance and stable and reliable use.

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 modifications and adaptations can be made by those skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims (8)

1. A movable spring, comprising:

the fixed end is used for being connected with the yoke iron; and

the movable end at least comprises a first installation part connected with the first deformation part and a movable part which is connected with the first installation part and can elastically deform, the first installation part is used for installing a movable contact, and the movable part is used for connecting an armature;

the elastic coefficient of the first deformation part is smaller than that of the movable part, and the elastic coefficient of the movable part is increased along with the reduction of the distance between the armature and the polar surface of the electromagnetic iron core.

2. The movable spring of claim 1 wherein the cross-sectional area of the movable portion decreases or increases in a direction approaching the first mounting portion.

3. The movable spring of claim 2, wherein the movable portion has a trapezoidal or inverted trapezoidal shape.

4. A movable spring according to claim 3, wherein both sides of the movable portion transition through a circular arc.

5. The movable spring according to claim 2, wherein the movable portion has a through-slot formed at an end thereof closer to the first mounting portion, and the end of the through-slot closer to the armature is smaller or larger than the end closer to the first mounting portion.

6. A movable spring blade according to claim 5 wherein the through slot is an inverted trapezoidal or trapezoidal slot.

7. The movable spring according to claim 1, wherein the movable portion comprises a second mounting portion and a movable deformation portion, the armature is mounted on the second mounting portion, a second deformation portion is disposed between the second mounting portion and the first mounting portion, the movable deformation portion is connected to the second mounting portion, and the movable deformation portion can abut against the first mounting portion and/or the movable contact and elastically deform during a process of reducing a distance between the armature and the polar surface of the electromagnetic core.

8. A relay, comprising:

the electromagnetic iron core is externally wound with a coil;

the movable spring of any one of claims 1-7;

the movable contact is arranged on the movable spring piece;

the fixed contact is arranged corresponding to the movable contact;

one end of the yoke is connected with the polar surface at one end of the electromagnetic iron core, and the other end of the yoke is connected with the movable spring piece; and

the armature is connected with the movable spring, and when the armature is attracted by the polar surface at the other end of the electromagnet core, the armature can drive the movable spring to elastically deform so as to close the movable contact and the static contact.

Images