阅读说明：本技术 一种电磁继电器 (Electromagnetic relay ) 是由 代文广 何仲波 黄庆阳 吴意文 于 2021-08-11 设计创作，主要内容包括：本发明公开了一种电磁继电器,包括推动卡和动簧片；动簧片包括固定有动触点的主簧片和从动触点的周围位置相对于主簧片呈斜向伸出的动压簧片；推动卡设有卡槽；主簧片的一部分和动压簧片的一部分配合在推动卡的卡槽中；在主簧片与动压簧片的相交处至主簧片或动压簧片的末端的位置处,主簧片和动压簧片中的至少其中一个设有向对应的另一个的方向凸伸的突出部。本发明利用突出部对动压簧片的支点作用,增加对触点的压力力值,以抑制触点回跳,同时分摊动簧片在不减小动合压力情况下的应力,从而解决机械疲劳引起的压力损失导致的闭合触点回跳大的问题,确保了动作回跳时间能够控制在要求的范围以内。(The invention discloses an electromagnetic relay, which comprises a push card and a movable reed, wherein the push card is connected with the movable reed through a connecting rod; the movable reed comprises a main reed fixed with a movable contact and a dynamic pressure reed, wherein the peripheral position of the driven contact obliquely extends relative to the main reed; the pushing clamp is provided with a clamping groove; a part of the main reed and a part of the dynamic pressure reed are matched in a clamping groove of the push card; at a position from an intersection of the main reed and the dynamic pressure reed to a tip of the main reed or the dynamic pressure reed, at least one of the main reed and the dynamic pressure reed is provided with a protrusion protruding in a direction of the corresponding other. The invention utilizes the fulcrum action of the protrusion part on the dynamic pressure reed to increase the pressure value to the contact to inhibit the rebound of the contact, and simultaneously distributes the stress of the dynamic pressure reed under the condition of not reducing the dynamic closing pressure, thereby solving the problem of large rebound of the closed contact caused by pressure loss caused by mechanical fatigue and ensuring that the action rebound time can be controlled within the required range.)

1. An electromagnetic relay includes a push card and a movable reed; the movable reed comprises a main reed fixed with a movable contact and a dynamic pressure reed, wherein the peripheral position of the driven contact extends out in an inclined mode relative to the main reed; the pushing clamp is provided with a clamping groove; a part of the main reed and a part of the dynamic pressure reed are matched in a clamping groove of the push card; the method is characterized in that: at the position from the intersection of the main reed and the dynamic pressure reed to the tail end of the main reed or the dynamic pressure reed, at least one of the main reed and the dynamic pressure reed is provided with a protruding part protruding towards the corresponding other direction, so that in an overtravel stage and a contact closing stage after the overtravel stage, the pressure value of the contact is increased by utilizing the fulcrum action of the protruding part on the dynamic pressure reed, the contact rebound is inhibited, and meanwhile, the stress of the dynamic pressure reed under the condition of not reducing the dynamic closing pressure is distributed, so that the problem of large closed contact rebound caused by pressure loss caused by mechanical fatigue is solved, and the action rebound time can be controlled within a required range.

2. An electromagnetic relay according to claim 1, characterized in that: when a part of the main reed and a part of the dynamic pressure reed are matched with a clamping groove of the push card, a certain gap is arranged between a protruding part arranged on at least one of the main reed and the dynamic pressure reed and the corresponding other of the main reed and the dynamic pressure reed, so that more than two times of pressurization is formed by utilizing the fulcrum action of the protruding part to increase the pressure value of the contact so as to inhibit the contact from rebounding in the rear-stage stroke of the overtravel stage after the protruding part is contacted with the corresponding other of the main reed and the dynamic pressure reed and the contact closing stage after the overtravel stage.

3. An electromagnetic relay according to claim 2, characterized in that: at least one of the main spring plate and the dynamic pressure spring plate is provided with a plurality of protruding parts, and the plurality of protruding parts are distributed between positions corresponding to the moving contact to the tail end of the main spring plate or the dynamic pressure spring plate so as to form a plurality of sections of K values to pressurize the contact for a plurality of times by utilizing the fulcrum action of the plurality of protruding parts and inhibit the contact from rebounding; and K is the elastic coefficient of the spring.

4. An electromagnetic relay according to claim 1, characterized in that: when a part of the main reed and a part of the dynamic pressure reed are matched with a clamping groove of the push card, a protruding part arranged on at least one of the main reed and the dynamic pressure reed is abutted against the other corresponding one of the main reed and the dynamic pressure reed, so that the pressure value of the contact is increased by utilizing the fulcrum action of the protruding part in the full-stroke stage and the contact closing stage after the overtravel stage, and the contact rebound is inhibited.

5. An electromagnetic relay according to claim 1, 2 or 4, characterized in that: the movable spring plate comprises at least two overlapped spring plates, and the movable contact is fixed at the corresponding position of the at least two overlapped spring plates; and a first U-shaped strip groove is arranged in one of the spring leaves at the outermost side back to the movable contact along the corresponding periphery of the movable contact, a first crease line extends from the first U-shaped strip groove to two sides of the width of the spring leaf, and the dynamic pressure spring leaf is formed by bending the tail end of one of the spring leaves at the outermost side back to the movable contact along the first crease line to form a preset included angle relative to the spring leaf.

6. An electromagnetic relay according to claim 5, characterized in that: and the connecting line of the first crease line passes through the central point of the movable contact.

7. An electromagnetic relay according to claim 5, characterized in that: the protrusion is a protrusion formed on the dynamic pressure reed, and the protrusion protrudes from the dynamic pressure reed toward the main reed.

8. An electromagnetic relay according to claim 5, characterized in that: the protrusion is a protrusion formed in the other reed of the at least two overlapped reeds adjacent to the outermost reed facing away from the movable contact, and the protrusion protrudes from the other reed in the direction of the dynamic pressure reed.

9. An electromagnetic relay according to claim 5, characterized in that: the protrusion part is a protrusion formed on the dynamic pressure reed and a protrusion formed on the other reed of the at least two overlapped reeds close to the outermost reed back to the moving contact, and the protrusion on the dynamic pressure reed and the protrusion in the other reed protrude in opposite directions.

10. An electromagnetic relay according to claim 7, 8 or 9, characterized in that: the convex bracts are long-strip convex bracts or round convex bracts or oval convex bracts or special-shaped convex bracts which are integrally formed in the dynamic pressure reed and/or the other reed.

11. An electromagnetic relay according to claim 7, 8 or 9, characterized in that: the convex bracts are formed by being fixed in the dynamic pressure reed and/or the other reed by rivets.

12. An electromagnetic relay according to claim 7, 8 or 9, characterized in that: one or more convex bracts; when the number of the protrusions is plural, the plural protrusions are distributed along the width direction of the dynamic pressure reed.

13. An electromagnetic relay according to claim 7, 8 or 9, characterized in that: the number of the convex bracts is one or more, and when the number of the convex bracts is multiple, the multiple convex bracts are distributed along the length direction of the dynamic pressure reed.

14. An electromagnetic relay according to claim 5, characterized in that: the protruding part is a small tongue piece integrally connected to the dynamic pressure reed, and the small tongue piece protrudes from the dynamic pressure reed to the main reed direction.

15. An electromagnetic relay according to claim 12, characterized in that: a second U-shaped strip groove is formed in the dynamic pressure reed; in the dynamic pressure reed, a second crease line is arranged at a position close to the U-shaped bottom of the solid part in the U-shaped opening of the second U-shaped groove, and the small tongue piece is formed by bending the solid part in the U-shaped opening of the second U-shaped groove along the second crease line to form a preset included angle relative to the dynamic pressure reed.

16. An electromagnetic relay according to claim 5, characterized in that: a small spring leaf is fixed between the movable contact and the spring leaf overlapped with the at least two spring leaves, one end of the small spring leaf penetrates through the main spring leaf from one surface of the main spring leaf corresponding to the movable contact, and the protrusion part is formed on one surface of the main spring leaf back to the movable contact.

17. An electromagnetic relay according to claim 16, characterized in that: the small spring plate comprises a main body part used for being fixed with the movable contact and a peripheral part separated by the third U-shaped strip groove, third crease lines are respectively arranged on two sides of the peripheral part corresponding to the third U-shaped strip groove, a small tongue spring is arranged at one end of the peripheral part corresponding to the small spring plate, the small tongue spring penetrates through the main spring plate from one side of the main spring plate corresponding to the movable contact, and the protrusion part is formed on one side of the main spring plate opposite to the movable contact.

18. An electromagnetic relay according to claim 17, characterized in that: and the connecting line of the third crease line passes through the central point of the movable contact.

19. An electromagnetic relay according to claim 17, characterized in that: and in the main body part of the small reed, a small pressure spring matched with a base of the relay is arranged at the other end corresponding to the small reed in a bending mode outwards.

Technical Field

The invention relates to the technical field of relays, in particular to an electromagnetic relay.

Background

A relay is an electronic control device having a control system (also called an input loop) and a controlled system (also called an output loop), which is commonly used in automatic control circuits, and which is actually an "automatic switch" that uses a small current to control a large current. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like. One type of relay in the prior art uses a push card to drive a movable spring of a contact portion to move, so that a movable contact on the movable spring is in contact with or separated from a fixed contact on a fixed spring. Fig. 1 shows an electromagnetic relay of the prior art, which includes a movable reed 100 and a push clamp 200, wherein the movable reed 100 includes a main reed 102 to which a movable contact 101 is fixed and a dynamic pressure reed 103, the dynamic pressure reed 103 is formed by an extension piece formed by tearing one side of one reed in the main reed 102, in the relay of this structure, if a large dynamic pressure is to be generated, the stress of the dynamic pressure reed 103 is concentrated on a bending line 104, the dynamic pressure reed 103 is easily fatigued and broken, the push clamp 200 is provided with a clamping groove 201, in an initial state, the main reed 102 and the dynamic pressure reed 103 are tensioned in the clamping groove 201 of the push clamp 200, the dynamic pressure reed and the push clamp have a certain clamping force, at the moment when the contacts are closed, the push clamp 200 then pushes the dynamic pressure reed 103, the angle of the dynamic pressure reed 103 relative to the main reed 102 becomes small, the push clamp finishes over-stroke, the angular compression of the dynamic pressure reed 103 relative to the main reed 102 is minimized, in the electromagnetic relay having such a configuration, the dynamic pressure reed 103 generates dynamic pressure in the dynamic pressure reed 100, and when the dynamic pressure is large, stress of the dynamic pressure reed 103 concentrates on the position of the bending line 104 of the dynamic pressure reed 103, which causes stress concentration in the dynamic pressure reed 103, that is, the dynamic pressure reed has a problem of stress concentration. In the prior art, in order to control the action rebound time within the range of 0.2ms, the bounce of the moving contact needs to be restrained by making the moving contact pressure large (more than a typical value of 6N), and at this time, the moving contact pressure is generated by bending and deforming a bending line 104 of a dynamic pressure spring 103 of the moving spring, so that the stress is concentrated at the position of the bending line 104. When the relay is in a closed state for a long time, the bending line position can generate mechanical fatigue under a deformation state for a long time, pressure loss is brought, when dynamic pressure is reduced to a certain extent, the problem that the action rebound time is increased can occur to a product, namely, the bounce of the movable contact can not be effectively inhibited after the action closing pressure is reduced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides an electromagnetic relay which can solve the problem of large rebound of a closed contact in the prior art through structural improvement, avoid the phenomenon that dynamic pressure is reduced due to the fact that a dynamic pressure reed is easy to be subjected to mechanical fatigue in a long-term closed stress state, and ensure that the action rebound time can be controlled within a required range.

The technical scheme adopted by the invention for solving the technical problems is as follows: an electromagnetic relay includes a push card and a movable reed; the movable reed comprises a main reed fixed with a movable contact and a dynamic pressure reed, wherein the peripheral position of the driven contact extends out in an inclined mode relative to the main reed; the pushing clamp is provided with a clamping groove; a part of the main reed and a part of the dynamic pressure reed are matched in a clamping groove of the push card; at the position from the intersection of the main reed and the dynamic pressure reed to the tail end of the main reed or the dynamic pressure reed, at least one of the main reed and the dynamic pressure reed is provided with a protruding part protruding towards the corresponding other direction, so that in an overtravel stage and a contact closing stage after the overtravel stage, the pressure value of the contact is increased by utilizing the fulcrum action of the protruding part on the dynamic pressure reed, the contact rebound is inhibited, and meanwhile, the stress of the dynamic pressure reed under the condition of not reducing the dynamic closing pressure is distributed, so that the problem of large closed contact rebound caused by pressure loss caused by mechanical fatigue is solved, and the action rebound time can be controlled within a required range.

When a part of the main reed and a part of the dynamic pressure reed are matched with a clamping groove of the push card, a certain gap is arranged between a protruding part arranged on at least one of the main reed and the dynamic pressure reed and the corresponding other of the main reed and the dynamic pressure reed, so that more than two times of pressurization is formed by utilizing the fulcrum action of the protruding part to increase the pressure value of the contact so as to inhibit the contact from rebounding in the rear-stage stroke of the overtravel stage after the protruding part is contacted with the corresponding other of the main reed and the dynamic pressure reed and the contact closing stage after the overtravel stage.

At least one of the main spring plate and the dynamic pressure spring plate is provided with a plurality of protruding parts, and the plurality of protruding parts are distributed between positions corresponding to the moving contact to the tail end of the main spring plate or the dynamic pressure spring plate so as to form a plurality of sections of K values to pressurize the contact for a plurality of times by utilizing the fulcrum action of the plurality of protruding parts and inhibit the contact from rebounding; and K is the elastic coefficient of the spring.

When a part of the main reed and a part of the dynamic pressure reed are matched with a clamping groove of the push card, a protruding part arranged on at least one of the main reed and the dynamic pressure reed is abutted against the other corresponding one of the main reed and the dynamic pressure reed, so that the pressure value of the contact is increased by utilizing the fulcrum action of the protruding part in the full-stroke stage and the contact closing stage after the overtravel stage, and the contact rebound is inhibited.

The movable spring plate comprises at least two overlapped spring plates, and the movable contact is fixed at the corresponding position of the at least two overlapped spring plates; and a first U-shaped strip groove is arranged in one of the spring leaves at the outermost side back to the movable contact along the corresponding periphery of the movable contact, a first crease line extends from the first U-shaped strip groove to two sides of the width of the spring leaf, and the dynamic pressure spring leaf is formed by bending the tail end of one of the spring leaves at the outermost side back to the movable contact along the first crease line to form a preset included angle relative to the spring leaf.

And the connecting line of the first crease line passes through the central point of the movable contact.

The protrusion is a protrusion formed on the dynamic pressure reed, and the protrusion protrudes from the dynamic pressure reed toward the main reed.

The protrusion is a protrusion formed in the other reed of the at least two overlapped reeds adjacent to the outermost reed facing away from the movable contact, and the protrusion protrudes from the other reed in the direction of the dynamic pressure reed.

The protrusion part is a protrusion formed on the dynamic pressure reed and a protrusion formed on the other reed of the at least two overlapped reeds close to the outermost reed back to the moving contact, and the protrusion on the dynamic pressure reed and the protrusion in the other reed protrude in opposite directions.

The convex bracts are long-strip convex bracts or round convex bracts or oval convex bracts or special-shaped convex bracts which are integrally formed in the dynamic pressure reed and/or the other reed.

The convex bracts are formed by being fixed in the dynamic pressure reed and/or the other reed by rivets.

One or more convex bracts; when the number of the protrusions is plural, the plural protrusions are distributed along the width direction of the dynamic pressure reed.

The number of the convex bracts is one or more, and when the number of the convex bracts is multiple, the multiple convex bracts are distributed along the length direction of the dynamic pressure reed.

The protruding part is a small tongue piece integrally connected to the dynamic pressure reed, and the small tongue piece protrudes from the dynamic pressure reed to the main reed direction.

A second U-shaped strip groove is formed in the dynamic pressure reed; in the dynamic pressure reed, a second crease line is arranged at a position close to the U-shaped bottom of the solid part in the U-shaped opening of the second U-shaped groove, and the small tongue piece is formed by bending the solid part in the U-shaped opening of the second U-shaped groove along the second crease line to form a preset included angle relative to the dynamic pressure reed.

A small spring leaf is fixed between the movable contact and the spring leaf overlapped with the at least two spring leaves, one end of the small spring leaf penetrates through the main spring leaf from one surface of the main spring leaf corresponding to the movable contact, and the protrusion part is formed on one surface of the main spring leaf back to the movable contact.

The small spring plate comprises a main body part used for being fixed with the movable contact and a peripheral part separated by the third U-shaped strip groove, third crease lines are respectively arranged on two sides of the peripheral part corresponding to the third U-shaped strip groove, a small tongue spring is arranged at one end of the peripheral part corresponding to the small spring plate, the small tongue spring penetrates through the main spring plate from one side of the main spring plate corresponding to the movable contact, and the protrusion part is formed on one side of the main spring plate opposite to the movable contact.

And the connecting line of the third crease line passes through the central point of the movable contact.

And in the main body part of the small reed, a small pressure spring matched with a base of the relay is arranged at the other end corresponding to the small reed in a bending mode outwards.

Compared with the prior art, the invention has the beneficial effects that:

1. the present invention is advantageous in that at least one of the main spring and the dynamic pressure spring is provided with a protrusion protruding in the direction of the corresponding other at a position corresponding to the movable contact to the tip of the main spring or the dynamic pressure spring. The structure of the invention can utilize the fulcrum action of the protrusion part on the dynamic pressure reed in the overtravel stage and the contact closing stage after the overtravel to increase the pressure value on the contact to inhibit the contact rebound, and simultaneously share the stress of the dynamic pressure reed under the condition of not reducing the dynamic closing pressure, thereby solving the problem of large rebound of the closed contact caused by pressure loss caused by mechanical fatigue, ensuring that the action rebound time can be controlled within the required range, such as controlling the action rebound time within 0.2 ms.

2. In the present invention, the protrusion provided on at least one of the main reed and the dynamic pressure reed is designed to have a certain gap with the corresponding other of the main reed and the dynamic pressure reed. In the above configuration of the present invention, the pressure value applied to the contact is increased by the pressure applied to the contact twice or more by the projecting portion at the post-overtravel stage after the projecting portion comes into contact with the corresponding other one of the main spring and the dynamic pressure spring and at the contact closing stage after the overtravel thereof, so that the contact bounce can be suppressed. And when the number of the protruding parts is plural, and the plural protruding parts are distributed between positions corresponding to the moving contact to the end of the main spring or the dynamic pressure spring, the contact can be pressurized a plurality of times by forming a plurality of stages of K values by utilizing the fulcrum action of the plural protruding parts, so as to restrain the contact from bouncing back.

3. In the present invention, the protrusion provided in at least one of the main reed and the dynamic pressure reed is designed to abut against the corresponding other of the main reed and the dynamic pressure reed. The structure of the invention can utilize the projection to increase the pressure value to the contact in the whole overtravel stage and the contact closing stage after the overtravel stage so as to inhibit the contact from rebounding.

4. The invention adopts the design that the protruding part is a convex bud formed on the dynamic pressure reed or the convex bud formed on the other reed of the at least two overlapped reeds which is close to the outermost reed back to the moving contact. According to the structure, after the convex bract props against the reed, the convex bract serves as a fulcrum, the force arm is shortened, the pressurizing speed is obviously increased, the effects of instantly pressurizing and increasing the force value by changing the fulcrum and dispersing the stress of the reed by changing the fulcrum are achieved, and the spring leaf pressurizing structure has the characteristics of simple structure and low manufacturing cost.

5. The invention adopts a small tongue piece which is integrally connected with the dynamic pressure reed, or a small tongue piece which is fixed at one end of a small spring piece of the movable contact penetrates through the main spring piece from one surface of the main spring piece corresponding to the movable contact, and the protruding part is formed outside one surface of the main spring piece back to the movable contact. According to the structure, the small tongue piece or the small tongue spring is matched with the dynamic pressure reed, so that the total dynamic pressure is shared by two pressure spring structures (namely the dynamic pressure reed, the small tongue piece or the small tongue spring), the pressure value to the contact can be increased, the contact rebound is inhibited, the stress applied to the dynamic pressure reed is small, the mechanical fatigue is not easy to generate, and the dynamic pressure loss can be improved.

6. The structure of the invention also has the effect of short circuit resistance, during the short circuit process, the moving contact is repelled by larger repulsion force generated between the contacts, the prior art needs longer overtravel and time to reach the force value for inhibiting the repulsion force, the invention can increase the contact pressure in a short time through the fulcrum action of the protruding part, reach the force value for inhibiting the repulsion force and prevent the contact from repelling.

The invention is further explained in detail with the accompanying drawings and the embodiments; an electromagnetic relay of the present invention is not limited to the embodiment.

Drawings

Fig. 1 is a schematic diagram of a partial structure of an electromagnetic relay of the prior art;

FIG. 2 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 3 is a schematic diagram of the cooperation of the movable spring, the fixed spring and the pushing card (the movable contact and the fixed contact are just contacted) in the first embodiment of the invention;

FIG. 4 is a schematic diagram of the cooperation of the movable spring, the stationary spring and the push card according to the first embodiment of the present invention (over-travel stage);

FIG. 5 is a schematic structural diagram of a movable spring plate according to a first embodiment of the present invention;

fig. 6 is a front view of one of the movable springs according to the first embodiment of the present invention;

figure 7 is a side view of one of the leaves of the moveable spring in accordance with the first embodiment of the invention;

fig. 8 is a rear view of one of the movable springs according to the first embodiment of the present invention;

fig. 9 is a schematic structural view of a movable spring according to a second embodiment of the present invention;

fig. 10 is a front view of another spring plate of the movable spring plate according to the second embodiment of the present invention;

figure 11 is a side view of another spring in the movable spring of the second embodiment of the present invention;

fig. 12 is a rear view of another spring of the movable spring according to the second embodiment of the present invention;

FIG. 13 is a schematic diagram of the mating of the movable spring, the stationary spring and the push card of the third embodiment of the present invention (the movable contact and the stationary contact are just in contact);

FIG. 14 is a schematic diagram of the engagement of the dynamic spring, static spring and push card of the third embodiment of the present invention (over-travel stage);

FIG. 15 is a schematic view of the engagement of the dynamic spring, static spring and push card of the third embodiment of the present invention (over-travel end);

fig. 16 is a schematic structural view of one reed of the movable reed according to the third embodiment of the present invention;

fig. 17 is a top view of one of the springs of the movable spring according to the third embodiment of the present invention;

fig. 18 is a schematic structural view (back side facing forward) of one of the movable springs according to the third embodiment of the present invention;

FIG. 19 is a schematic diagram of the mating of the movable spring, the stationary spring and the push card of the fourth embodiment of the present invention (the movable contact and the stationary contact are just in contact);

FIG. 20 is a schematic illustration of the engagement of the dynamic, static and push clips of the fourth embodiment of the present invention (over-travel end);

FIG. 21 is a schematic diagram of the mating of the dynamic, static and push cards of the fifth embodiment of the invention (the dynamic and static contacts are just touching);

FIG. 22 is a schematic illustration of the engagement of the dynamic, static and push springs of example five of the present invention (over-travel stage);

FIG. 23 is a schematic view of the engagement of the dynamic, static and push clips of the fifth embodiment of the invention (over-travel end);

FIG. 24 is a schematic perspective view of a small spring plate according to the fifth embodiment of the present invention;

FIG. 25 is a schematic diagram of the mating of the dynamic, static and push cards of the sixth embodiment of the invention (the dynamic and static contacts are just touching);

FIG. 26 is a schematic illustration of the engagement of the dynamic, static and push clips of a sixth embodiment of the invention (over-travel end);

FIG. 27 is a schematic view of the fitting of the dynamic spring and the push card according to the seventh embodiment of the present invention (the dynamic spring is fitted into the push card);

fig. 28 is a schematic view showing the engagement of the movable spring and the push card (over-stroke end) according to the seventh embodiment of the present invention.

Detailed Description

Example one

Referring to fig. 2 to 8, an electromagnetic relay according to the present invention includes a push card 1 and a movable spring piece 2; the movable contact spring 2 comprises a main spring 22 fixed with a movable contact 21 and a dynamic pressure spring extending obliquely relative to the main spring from the peripheral position of the driven contact, the dynamic pressure spring 23 of the embodiment extends obliquely from the peripheral position of the main spring 22 corresponding to the movable contact, the peripheral position of the movable contact refers to the whole peripheral position of the movable contact, and can be corresponding to the width direction of the movable spring or the length direction of the movable spring, and the oblique position of the dynamic pressure spring of the embodiment corresponds to the peripheral position of the movable contact corresponding to the width direction of the movable spring; the push card 1 is provided with a clamping groove 11; the slot 11 of this embodiment is provided with an opening, and certainly, the slot may not be provided with an opening, and the slot 11 is in a through hole shape; a part of the main reed and a part of the dynamic pressure reed are matched in a clamping groove of the push card, in this embodiment, the main reed 22 and the dynamic pressure reed 23 are matched in the clamping groove 11 of the push card 1 according to a preset clamping force; at the position from the intersection of the main spring and the dynamic pressure reed to the end of the main spring or the dynamic pressure reed, in this embodiment, at the position corresponding to the moving contact 21 of the main spring 22 to the card slot 11 of the push card 1, one of the main spring 22 and the dynamic pressure reed 23 is provided with a protruding part protruding in the other direction, so that in the overtravel stage and the contact closing stage after the overtravel, the pressure value to the contact is increased by the fulcrum action of the protruding part to the dynamic pressure reed, so as to inhibit the contact bounce, and the stress of the dynamic pressure reed under the condition of not reducing the dynamic pressure is distributed, thereby solving the problem of large bounce of the closed contact caused by pressure loss caused by mechanical fatigue, and ensuring that the bounce time can be controlled within the required range.

In the present embodiment, the protrusion is a protrusion 31 integrally formed on the dynamic pressure reed 23, and the protrusion 31 protrudes from the dynamic pressure reed 23 in the direction of the main reed 22.

In this embodiment, the movable spring plate 22 is composed of three overlapped spring plates 241, 242, 243, and the movable contact 21 is fixed at the corresponding position of the three overlapped spring plates 241, 242, 243; in the outermost spring leaf 241 facing away from the movable contact 21, a first U-shaped groove 2411 is formed along the corresponding circumference of the movable contact 21, a first crease line 2412 is formed by extending the first U-shaped groove 2411 to two sides of the width of the spring leaf 241, and the dynamic pressure spring leaf 23 is formed by bending the end of the outermost spring leaf 241 facing away from the movable contact along the first crease line 2412 to form a preset included angle relative to the spring leaf 241; the dynamic pressure reed may be a separate reed.

The main spring 22 of the present embodiment is composed of a part of the spring plate 241 (i.e., the remaining part excluding the dynamic pressure spring plate 23), the entirety of the spring plate 242, and the entirety of the spring plate 243.

In this embodiment, a line connecting the first folding line 2412 passes through a center point of the movable contact 21, i.e., a center point of the movable contact fitting hole 2413 of the spring plate 241. This is the best arrangement, and of course, the line connecting the first folding line 2412 may not pass through the center point of the movable contact 21.

In this embodiment, the bud 31 is a long bud, but the shape of the bud 31 may be circular, elliptical, irregular, or the like. The protrusions may also be formed by being fixed in the dynamic pressure reed by rivets.

In this embodiment, there is one protrusion 31.

Of course, the number of the bracts can be multiple, such as two, three or more, etc.; when the number of the convex bracts is multiple, two distribution situations can be provided, one situation is that the multiple convex bracts are distributed along the width direction of the dynamic pressure reed, the situation is the same as the embodiment and is a fulcrum, the other situation is that the multiple convex bracts are distributed along the length direction of the dynamic pressure reed, the situation can form multiple fulcrums, of course, each fulcrum can be one or more convex bracts, and in the situation, the fulcrum action of the multiple convex bracts can be utilized to pressurize the contact for multiple times so as to inhibit the contact from rebounding.

In this embodiment, when a part of the main spring and a part of the dynamic pressure spring are fitted in the engaging groove of the push card, in this embodiment, the main spring 22 and the dynamic pressure spring 23 are fitted in the engaging groove 11 of the push card 1 with a preset clamping force, a certain gap is provided between the protrusion 31 protruding in the direction of the main spring 22, which is provided in the dynamic pressure spring 23, and the main spring 22, and actually, a certain gap is provided between the protrusion 31 and the spring 242 on the dynamic pressure spring 23 (as shown in fig. 3), so that in the rear stage of the overtravel stage after the protrusion 31 of the dynamic pressure spring 23 contacts the main spring 22 and the contact closing stage after the overtravel stage, the fulcrum action of the protrusion 31 on the dynamic pressure spring 23 is utilized to increase the pressure value to the contact to suppress the contact bounce, and meanwhile, the stress of the movable spring plate under the condition of not reducing the moving closing pressure is shared, so that the problem of large rebound of the closed contact is solved, and the action rebound time can be controlled within the required range.

At the initial stage, the movable reed 2 and the push card 1 have a certain clamping force, and at the moment, the long force arm is used, at the moment when the movable and static contacts are just closed, the push card 1 starts to push the dynamic pressure reed 23 (if no clamping force exists, the push card can move a section of idle stroke more and then push the dynamic pressure reed), so that the dynamic pressure reed 23 is compressed and deformed to generate dynamic pressure, at the moment, the convex bud 31 on the dynamic pressure reed 23 is not in contact with the reed 242, the long force arm functions (the same as the prior art), and the stress of the dynamic pressure reed is mainly concentrated on the first crease line 2412 of the dynamic pressure reed 23; when the push card 1 is pushed to a certain distance (namely, the gap is completely removed), the convex bract 31 on the dynamic pressure reed 23 is contacted with the reed 242, the compression fulcrum of the dynamic pressure reed 23 is transferred to the convex bract 31 through the first crease line 2412, the convex bract 31 is contacted with the reed 242 and then becomes the fulcrum, the moment arm becomes a short moment arm (different from the prior art), the K value is increased, the pressurizing speed is higher, and therefore the bounce of the movable contact caused by contact collision can be inhibited. The fulcrum of the compression of the dynamic pressure reed 23 is transferred from the first crease line 2412 to the bud 31, and simultaneously, the stress of the dynamic pressure reed 23 is transferred from the first crease line 2412 to the bud 31, and the pushing card 1 continues to push the dynamic pressure reed 2 to make the bud 31 push against the reed 242 to complete the overtravel. In the rear-stage stroke of the overtravel stage and the contact closing stage after the overtravel stage, the stress of the dynamic pressure reed is mainly concentrated at the position of the convex bract 31, the convex bract 31 bears most of the stress, and the first crease line 2412 bears less of the stress, so that the stress of the dynamic pressure reed under the condition of not reducing the dynamic joint pressure is shared; the dynamic pressure reed 23 is less stressed, mechanical fatigue is less likely to occur, and dynamic pressure loss can be improved. Therefore, the problem of large rebound of the closed contact caused by pressure loss caused by mechanical fatigue is solved.

The electromagnetic relay of the present invention adopts a dynamic pressure reed 23 having a protrusion 31 protruding in the other direction at a position corresponding to the moving contact of the main reed to the notch of the push card. According to the structure, in the overtravel stage and the contact closing stage after the overtravel, the fulcrum action of the convex bracts 31 on the dynamic pressure reed 23 is utilized to increase the pressure value on the contact to inhibit the contact rebound, and the stress of the dynamic pressure reed under the condition of not reducing the dynamic closing pressure is simultaneously distributed, so that the problem of large closed contact rebound caused by pressure loss caused by mechanical fatigue is solved, and the action rebound time can be controlled within a required range, such as the action rebound time is controlled within 0.2 ms.

The invention relates to an electromagnetic relay, which designs a certain gap between a convex bud 31 of a dynamic pressure reed 23 and a main reed (namely a reed 242). With this configuration of the present invention, the contact bounce can be suppressed by increasing the pressure value to the contact by the bud 31 at the post-overtravel stage of the overtravel stage after the bud 31 comes into contact with the main reed 22 and at the contact closing stage after the overtravel. When the plurality of the convex bracts 31 can be designed, and the plurality of the convex bracts 31 are distributed at the positions corresponding to the moving contact and the clamping grooves of the pushing card, a plurality of sections of K values can be formed to pressurize the contact for a plurality of times by utilizing the fulcrum action of the plurality of the convex bracts 31 so as to inhibit the contact from rebounding; and K is the elastic coefficient of the spring.

An electromagnetic relay of the present invention employs a projection 31 in which a projection is integrally formed on a dynamic pressure reed. According to the structure, after the convex bract 31 props against the reed 242, the convex bract 31 serves as a fulcrum, the force arm is shortened, the pressurizing speed is obviously increased, the effects of instantly pressurizing with the variable fulcrum and dispersing the stress of the reed with the variable fulcrum are achieved, and the structure is simple and the manufacturing cost is low.

In this embodiment, when the main spring plate 22 and the dynamic pressure spring plate 23 are fitted in the slot 11 of the push card 1 according to a preset clamping force, the protrusions 31 of the dynamic pressure spring plate 23 are designed to have a certain gap with the spring plates 242 of the main spring plate 22, and the size of the gap can be adjusted according to actual needs. As another implementation, when the main spring 22 and the dynamic pressure spring 23 are fitted into the notch 11 of the push card 1 with a predetermined clamping force, the bracts 31 of the dynamic pressure reed 23 are designed so that there is no gap from the reed 242 of the main reed 22, that is, the protrusions 31 of the dynamic pressure spring 23 are directly abutted on the spring pieces 242, and this structure, when the dynamic pressure spring 2 and the push card 1 have a certain clamping force in the initial stage, at the moment, the pressure to the contact is provided by a short force arm (different from the prior art), and during the overtravel process, dynamic pressure is generated by the deformation of the short force arm, so that the pressure is quickly increased to inhibit the contact from rebounding, when the push card 1 is not pushed, the stress of the dynamic pressure reed 23 is at the first crease line 2412, when the push card 1 starts to push the dynamic pressure reed 23 for overtravel, the main stress of the dynamic pressure reed 23 is transferred to the position of the bract 31.

The structure of the invention can increase the pressure value of the contact to inhibit the rebound of the contact, solve the problem of the concentration of the reed, and also has the effect of short circuit resistance, in the short circuit process, the larger repulsion generated between the contacts needs to repel the moving contact, the prior art needs longer overtravel and time to reach the value of the repulsion, the invention can increase the pressure of the contact in a short time through the fulcrum action of the convex bract 31, reach the value of the repulsion, and prevent the contact from being repelled.

Example two

Referring to fig. 9 to 12, an electromagnetic relay according to the present invention is different from the first embodiment in that the protrusion is a protrusion 32 formed in the other leaf spring piece 242 of the three overlapped leaf springs 241, 242, 243 immediately adjacent to the outermost leaf spring piece 241 facing away from the movable contact, and the protrusion 32 protrudes from the other leaf spring piece 242 in the direction of the dynamic pressure spring 23.

EXAMPLE III

Referring to fig. 13 to 18, an electromagnetic relay according to the present invention is different from the first embodiment in that the protrusion is a small tongue 33 integrally connected to the dynamic pressure reed 23, and the small tongue 33 protrudes from the dynamic pressure reed 23 in the direction of the main reed 22.

In this embodiment, the dynamic pressure reed 23 is provided with a second U-shaped groove 2414; in the dynamic pressure reed 23, a second crease line 2415 is formed at a position close to the U-shaped bottom of the solid portion in the U-shaped opening of the second U-shaped groove 2414, and the small tongue piece 33 is formed by bending the solid portion in the U-shaped opening of the second U-shaped groove 2414 at a preset angle with respect to the dynamic pressure reed 23 along the second crease line 2415.

In this embodiment, when the main reed 22 and the dynamic pressure reed 23 are fitted in the slot 11 of the push card 1 according to a preset clamping force, a certain gap is provided between the small tongue piece 33, which is a protrusion protruding toward the main reed 22, provided in the dynamic pressure reed 23 and the main reed 22, and actually, a certain gap is provided between the small tongue piece 33 on the dynamic pressure reed 23 and the reed 242 (as shown in fig. 13), so that, in the rear stroke and the suction stage of the over-stroke stage, a large force arm and a small force arm are deformed together to generate pressure by using the fulcrum action of the small tongue piece 33 acting between the main reed 22 and the dynamic pressure reed 23, and the pressure value to the contact is increased, thereby suppressing the contact bounce, and simultaneously distributing the stress of the dynamic pressure reed under the condition of not reducing the closing pressure, thereby solving the problem of large closed bounce caused by the pressure loss due to mechanical fatigue, the action rebound time can be controlled within a required range, for example, the action rebound time is controlled within 0.2 ms.

In this embodiment, the initial movable reed 2 and the push card 1 have a certain clamping force (as shown in fig. 13), at the moment when the movable and stationary contacts are just closed, the push card 1 starts to push the dynamic pressure reed 23 to be compressively deformed to generate dynamic pressure, and when the push card 1 is pushed to a certain distance, the small tongue piece 33 starts to contact with the reed 242 of the main reed 22 to be compressively deformed to also generate dynamic pressure (as shown in fig. 14), and the dynamic pressure reed 23 and the small tongue piece 33 are compressively deformed together to generate dynamic pressure, so that the pressure value to the contacts is increased until the push card 1 has finished over-stroke (as shown in fig. 15). According to the structure, the dynamic pressure reed 23 has a longer force arm, the speed of generating dynamic pressure is lower, the force arm of the small tongue piece 33 is shorter, the speed of generating dynamic pressure is higher than that of the large pressure spring, and when the dynamic pressure reed 23 and the small tongue piece 33 generate dynamic pressure simultaneously, the speed of generating dynamic pressure is higher than that of the dynamic pressure reed 23. The initial dynamic pressure reed 23 is compressed and deformed, the dynamic pressure generated by the initial dynamic pressure reed is slow, the armature part can be continuously attracted, and the stress of the dynamic pressure reed 23 is small. In the later period, the small tongue piece 33 participates in generating dynamic pressure, so that the dynamic pressure can be increased rapidly and effectively, and the small tongue piece 33 bears certain dynamic pressure and stress. Finally, the whole body reaches large dynamic pressure and small stress. In the initial stage of the overtravel, stress concentrates on the first crease line 2412 of the dynamic pressure reed 23, and in the later stage of the overtravel, dynamic pressure is simultaneously generated in the dynamic pressure reed 23 and the small tongue piece 33, and the stress is divided by the first crease line 2412 of the dynamic pressure reed 23 and the second crease line 2415 of the small tongue piece 33, thereby solving the problem of stress concentration of the dynamic pressure reed.

In an electromagnetic relay, a small tongue piece 33 is provided in which a protruding portion is integrally connected to a dynamic pressure reed 23. According to the structure, the small tongue piece 33 is matched with the dynamic pressure reed 23, so that the total dynamic pressure is shared by two pressure spring structures (namely the dynamic pressure reed 23 and the small tongue piece 33), the pressure value to the contact is increased, the contact rebound can be inhibited, the stress on the dynamic pressure reed 23 is small, the mechanical fatigue is not easy to generate, and the dynamic pressure loss can be improved; therefore, the problem of large rebound of the closed contact caused by pressure loss caused by mechanical fatigue is solved.

Example four

Referring to fig. 19 to 20, an electromagnetic relay according to the present invention is different from the third embodiment in that, when the main spring 22 and the dynamic pressure spring 23 are fitted into the notch 11 of the push card 1 with a predetermined clamping force, the small tongue piece 33, which is a protrusion provided in the dynamic pressure spring 23 and protrudes in the direction of the main spring 22, does not have a gap from the main spring 22, and actually, the small tongue piece 33 on the dynamic pressure spring 23 directly abuts against the spring 242 (as shown in fig. 19). According to the structure of the invention, when the movable reed 2 is loaded into the push card 1, the small tongue piece 33 is already contacted with the front reed 242, and a certain clamping force is provided between the movable reed 2 and the push card 1; at the moment when the dynamic and static contacts are closed, the dynamic pressure reed 23 and the small tongue piece 33 are compressed together to generate dynamic pressure; the closing process is that the dynamic pressure reed 23 and the small tongue piece 33 are compressed together to generate dynamic pressure until the push card 1 finishes over travel; in the whole overtravel process, the dynamic pressure reed 23 and the small tongue piece 33 generate dynamic pressure at the same time, so that the pressure value of the contact is increased, the contact rebound can be inhibited, and the stress of the reed can be shared.

EXAMPLE five

Referring to fig. 21 to 24, an electromagnetic relay according to the present invention is different from the first embodiment in that the protrusion is not a protrusion, a small spring 5 is fixed between the movable contact 21 and the three stacked springs, one end of the small spring 5 passes through the main spring 22 from a surface of the main spring 22 corresponding to the movable contact 21, and the protrusion is formed on a surface of the main spring 22 opposite to the movable contact 21.

In this embodiment, when the main spring 22 and the dynamic pressure spring 23 are engaged with the engaging groove 11 of the push card 1 with a predetermined holding force, a certain gap is provided between a protrusion provided in the small reed 5 and protruding in the direction of the dynamic pressure reed 23, and the dynamic pressure reed 23, so that, it is possible to perform the operation of the valve by utilizing the fulcrum action of the protruding portion of the small reed 5 acting between the main reed 22 and the dynamic pressure reed 23 at the rear stroke of the overtravel stage and the suction stage thereof, the large force arm and the small force arm are deformed together to generate pressure, the pressure value to the contact is increased, thereby restraining the rebound of the contact, simultaneously distributing the stress of the movable spring plate under the condition of not reducing the dynamic pressure, therefore, the problem of large rebound of the closed contact is solved, and the action rebound time can be controlled within a required range, such as within 0.2 ms.

In this embodiment, the small spring 5 includes a main body 51 fixed to the movable contact 21 and a peripheral portion 53 separated by the third U-shaped groove 52, two sides of the peripheral portion 53 corresponding to the third U-shaped groove 52 are respectively provided with a third crease line 54, one end of the peripheral portion 53 corresponding to the small spring is provided with a small tongue 34, the small tongue 34 penetrates the main spring 22 from a surface of the main spring 22 corresponding to the movable contact 21, and the protrusion is formed on a surface of the main spring 22 opposite to the movable contact 21.

In this embodiment, the connection line of the third crease line 54 passes through the central point of the movable contact 21.

In this embodiment, the main body 51 of the small spring 5 is provided with a small compression spring 55, which is bent outward corresponding to the other end of the small spring 5 and is used for matching with a base of a relay. The small compression spring 55 is compressed and deformed in the contact closing process to form buffering, so that the movable contact is decelerated, and rebound is further reduced.

When the movable reed 2 is installed in the push card 1, the dynamic pressure reed 23 is compressed, the small reed 34 is not deformed, and a certain clamping force is formed between the movable reed 2 and the push card 1; when the contacts are closed, the dynamic pressure reed 23 can start to compress to generate pressure, and the dynamic pressure reed 23 is compressed by a certain angle and then contacts with the small reed 34, so that the small reed 34 deforms to generate dynamic pressure. At the later stage of the overtravel, the dynamic pressure reed 23 and the small reed 34 generate dynamic pressure simultaneously, the pressure value to the contact is increased, so that the contact rebound can be inhibited, the stress is shared by the first crease line 2412 of the dynamic pressure reed 23 and the three crease line 54 of the small reed 34, and the problem of stress concentration of the dynamic reed is solved.

EXAMPLE six

Referring to fig. 25 to 26, an electromagnetic relay according to the present invention is different from the fifth embodiment in that, when the main spring 22 and the dynamic pressure spring 23 are fitted into the notch 11 of the push card 1 with a preset clamping force, a protrusion provided in the small spring 5 and protruding in the direction of the dynamic pressure spring 23 does not have a gap with the dynamic pressure spring 23, that is, the small spring 34 of the small spring 5 directly abuts against the dynamic pressure spring 23. According to the structure, when the movable reed 2 is installed in the push card 1, the small reed 34 is already contacted with the dynamic pressure reed 23, and a certain clamping force is formed between the movable reed 2 and the push card 1; at the moment when the dynamic and static contacts are closed, the dynamic pressure reed 23 and the small reed 34 are compressed together to generate dynamic pressure; the closing process is that the dynamic pressure reed 23 and the small reed 34 are compressed together to generate dynamic pressure until the push card 1 finishes over-travel; in the whole overtravel process, dynamic pressure is generated by the dynamic pressure reed 23 and the small reed 34 at the same time, so that the pressure value of the contact is increased, the contact rebound can be inhibited, and the stress of the reeds can be shared.

EXAMPLE seven

Referring to fig. 27 to 28, an electromagnetic relay according to the present invention is different from the second embodiment in that the protrusions 32 are not provided at positions corresponding to the movable contact 21 of the main spring 22 to the card slot 11 of the push card 1, but are provided on an extension of a line connecting the movable contact 21 to the card slot 11 of the push card 1.

In the initial stage, the movable reed 2 and the push card 1 have a certain clamping force, and at this time, a long force arm is provided, a certain gap exists between the convex bud 32 of the other reed 242 and the dynamic pressure reed 23, within 0.2ms, the gap is removed, the convex bud 32 of the other reed 242 starts to contact the dynamic pressure reed 23, a fulcrum is added after the convex bud 32 of the other reed 242 contacts the dynamic pressure reed 23, the added force arm is a short force arm, the K value is increased, and the pressure applying speed is higher. At the moment, the long force arm and the short force arm act together to deform simultaneously to generate dynamic pressure, so that the pressure value to the contact is increased, and the bounce of the movable contact caused by contact collision can be inhibited. When the main reed 22 and the dynamic pressure reed 23 are matched with the clamping groove 11 of the push card 1 according to a preset clamping force and the convex bract 32 of the other reed 242 has no gap with the dynamic pressure reed 23, the long force arm and the short force arm deform to generate dynamic pressure in the overtravel process, and the pressure can be rapidly increased to inhibit contact bounce.

The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the scope of the disclosed embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.