CN219626560U - Moving spring structure and electromagnetic relay - Google Patents

Abstract

The utility model discloses a movable spring structure and an electromagnetic relay, wherein the movable spring structure comprises a rigid movable reed and at least one movable contact, and further comprises a conductive flexible deformation structure, the flexible deformation structure is electrically connected to one end of the rigid movable reed, and the movable contact is arranged on the flexible deformation structure. The flexible deformation structure is arranged, so that a single movable contact or a plurality of movable contacts can be designed according to actual needs, under the condition of a plurality of movable contacts, each movable contact can be effectively contacted due to the flexible deformation effect of the flexible deformation structure, contact temperature rise of the contacts is reduced, and the effects of high current carrying and low heating are achieved.

Description

Moving spring structure and electromagnetic relay

Technical Field

The utility model relates to the technical field of relays, in particular to a movable spring structure and an electromagnetic relay.

Background

At present, a movable spring structure of an electromagnetic relay in the prior art adopts a rigid movable spring, namely, a thicker pure copper material is adopted as the movable spring, in order to meet the rotation requirement of the rigid movable spring, the rigid movable spring and a leading-out sheet are generally connected by adopting copper braided wires, and a counter-force spring is designed on the rigid movable spring so as to generate counter-force through the counter-force spring. The structure can improve the current carrying capacity, is approximately U-shaped in whole, and resists the Hall force generated by short-circuit current by utilizing the Lorentz force generated when current flows through a U-shaped loop so as to achieve the capacity of resisting the short-circuit current, but the main problem of the structure is that only a single movable contact can be designed, but a plurality of movable contacts cannot be arranged according to actual needs, so that the current carrying capacity is limited, and the problems that the contact resistance of the contacts is higher and the heating under high load is high exist. This is because the movable contact is directly provided on the rigid movable contact spring, but the rigid movable contact spring does not have deformability, and if a plurality of movable contacts are provided on the rigid movable contact spring, even if the heights of the plurality of movable contacts are made uniform, a phenomenon that some of the movable contacts are in good contact and the remaining movable contacts are in poor contact occurs with a high probability due to component assembly errors, component manufacturing precision errors, and the like.

Disclosure of Invention

Aiming at the technical problems in the prior art, the utility model provides a movable spring structure and an electromagnetic relay, which can not only be provided with a single movable contact, but also be provided with a plurality of movable contacts according to actual needs by improving the structure.

The technical scheme adopted for solving the technical problems is as follows: the movable spring structure comprises a rigid movable reed, at least one movable contact and a conductive flexible deformation structure, wherein the flexible deformation structure is electrically connected to one end of the rigid movable reed, and the movable contact is arranged on the flexible deformation structure.

Further, the flexible deformation structure comprises at least one flexible conductive piece and at least one elastic piece, one end of the flexible conductive piece and one end of the elastic piece are respectively and electrically connected with one end of the rigid movable reed, and the other end of the flexible conductive piece and the other end of the elastic piece are respectively and electrically connected with the movable contact.

Further, the flexible conductive piece is a flexible copper foil, the flexible copper foil and the elastic piece are overlapped together, and the contact surface of the movable contact and the elastic piece are positioned on two sides of the flexible copper foil in the thickness direction.

Further, the elastic sheet is made of stainless steel.

Further, one end of the flexible conductive member, one end of the elastic sheet and one end of the rigid movable reed are riveted and fixed, and the other end of the flexible conductive member, the other end of the elastic sheet and the movable contact are riveted and fixed.

Further, the number of the movable contacts is a plurality, and the movable contacts are arranged in parallel.

Further, the flexible deformation structure is provided with a bifurcation groove between adjacent movable contacts.

Further, two opposite lugs are arranged at the other end of the rigid movable reed, and shaft holes or rotating shafts are respectively arranged on the lugs so as to realize rotary connection of the rigid movable reed.

The utility model further provides an electromagnetic relay which comprises a magnetic circuit part and a pushing clamp, and further comprises at least one movable spring structure, wherein the movable spring structure is characterized in that the other end of the rigid movable spring is arranged in a rotating mode, and an armature part of the magnetic circuit part is connected with the movable spring structure through the pushing clamp.

Further, the pushing clamp is provided with a first clamping groove, the movable spring structure is provided with a second clamping groove, and the first clamping groove and the second clamping groove are mutually meshed together; the second clamping groove is positioned at one end of the rigid movable reed; the number of the movable contacts is multiple, and the movable contacts are arranged at intervals along the width direction of the rigid movable reed; the pushing card is provided with a pushing rib for pushing the movable spring structure to act, and the pushing rib and the movable contacts are positioned on the back side and the opposite side and extend along the arrangement direction of the plurality of movable contacts.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model further comprises a flexible deformation structure which is electrically connected with one end of the rigid movable reed, and the movable contacts are arranged on the flexible deformation structure, so that a single movable contact or a plurality of movable contacts can be designed according to actual needs. The flexible deformation structure can also realize the overtravel of the contact, improve the contact pressure and ensure that the movable contact is contacted with the static contact more reliably.

2. The flexible deformation structure preferably comprises the flexible conductive part and the elastic sheet, so that high current carrying can be realized, and heating is reduced, and the problem that the flexible deformation structure is easy to cause stress relaxation and lose elasticity when heating is high can be avoided.

3. The flexible conductive piece is preferably a flexible copper foil, so that the flexible copper foil and the elastic piece can be fixedly connected with the rigid movable reed and the movable contact by adopting a riveting process, and a welding process is not required, thereby greatly simplifying the connection process of the flexible conductive piece with the rigid movable reed and the movable contact.

4. The elastic sheet is preferably made of stainless steel and has the characteristics of good elasticity, low heat productivity, good thermal stability and the like.

5. The arrangement of the pushing ribs can ensure that a plurality of movable contacts on the flexible deformation structure are stressed and balanced, so that synchronous action is realized.

The utility model is described in further detail below with reference to the drawings and examples; the movable spring structure and the electromagnetic relay of the present utility model are not limited to the embodiments.

Drawings

FIG. 1 is a schematic perspective view of a moving spring structure of the present utility model;

FIG. 2 is a schematic perspective view of a flexible copper foil of the present utility model;

FIG. 3 is a schematic perspective view of the elastic sheet of the present utility model;

FIG. 4 is an enlarged schematic view of portion A of FIG. 3;

fig. 5 is a schematic perspective view (without a housing) of the electromagnetic relay of the present utility model;

FIG. 6 is a schematic diagram of a combination of the moving spring structure and the rigid moving spring pin and U-shaped copper foil of the present utility model;

FIG. 7 is a schematic diagram showing a combination of a movable spring structure and a rigid movable spring pin according to the present utility model;

fig. 8 is a schematic perspective view of an armature portion of the present utility model;

FIG. 9 is a schematic perspective view of a pusher card of the present utility model;

fig. 10 is a schematic perspective view of the armature portion and the pusher card of the present utility model in a combined state;

FIG. 11 is a top view of the push card and moving spring structure of the present utility model in a combined state (the moving spring structure is partially shown);

the spring comprises a rigid movable spring, 11/21, lugs, 2, a rigid movable spring leading-out pin, 3, a movable contact, 4, a U-shaped copper foil, 41, a strip hole, 5, a flexible copper foil, 51, a first bifurcation groove, 6, an elastic piece, 61, a second bifurcation groove, 62, a second clamping groove, 63, a flanging, 7, a rotating shaft, 8, an armature part, 81, an armature, 82, a plastic part, 83, a metal part, 831, a clamping arm, 832, a pushing block, 833, a limiting groove, 834, a third bifurcation groove, 9, a pushing clamp, 91, a clamping hole, 911, a yielding groove, 92, a first clamping groove, 93, a long rod, 931, a pushing rib, 10, a base, 20 and a static spring part.

Detailed Description

In the present disclosure, the terms "first," "second," and the like are used merely to distinguish between similar objects and not necessarily to describe a particular sequence or order, nor are they to be construed as indicating or implying a relative importance. In the description of the present utility model, unless otherwise indicated, "a plurality" means two or more, and "at least one" means one or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Referring to fig. 1-4, the movable spring structure of the present utility model includes a rigid movable spring 1, at least one movable contact 3, and a flexible deformation structure, wherein the flexible deformation structure is electrically connected to one end of the rigid movable spring 1, and the movable contact 3 is disposed on the flexible deformation structure.

The flexible deformation structure comprises at least one flexible conductive piece and at least one elastic piece 6, one end of the flexible conductive piece and one end of the elastic piece 6 are respectively and electrically connected with one end of the rigid movable reed 1, and the other end of the flexible conductive piece and the other end of the elastic piece 6 are respectively and electrically connected with the movable contact 3.

The flexible conductive member is a flexible copper foil 5, the flexible copper foil 5 and the elastic sheet 6 are stacked together, and the number of the flexible copper foils 5 is multiple, but not limited to this. The contact surface of the movable contact 3 and the elastic piece 6 are located on both sides of the flexible copper foil 5 in the thickness direction. One end of the flexible copper foil 5, one end of the elastic piece 6 and one end of the rigid movable reed 1 are riveted and fixed, and the other end of the flexible copper foil 5, the other end of the elastic piece 6 and the movable contact 3 are riveted and fixed, so that riveting holes are respectively formed at two ends of the flexible copper foil 5, two ends of the elastic piece 6 and the other end of the rigid movable reed 1. In other embodiments, the flexible conductive member is a copper wire or an aluminum wire or a braided wire, or the like. The elastic sheet 6 is made of stainless steel and has the characteristics of good elasticity, low heat productivity, good thermal stability and the like.

The number of the movable contacts 3 is plural, and the plurality of movable contacts 3 are arranged in parallel, specifically, the plurality of movable contacts 3 are arranged in parallel along the width direction of the rigid movable reed 1. In other embodiments, the number of movable contacts is one. In the present embodiment, the number of the movable contacts 3 is specifically two, but is not limited thereto.

The flexible deformation structure is provided with bifurcation grooves between adjacent movable contacts 3, so that the flexible deformation structure is bifurcated to form a plurality of branch parts which are distributed in parallel, and each branch part is provided with one movable contact 3. Since the number of the movable contacts 3 is two, the number of the branch portions is also two, but not limited thereto. The bifurcated groove is composed of a first bifurcated groove 51 provided on the flexible copper foil 5 and extending in a direction from the other end to one end thereof, and a second bifurcated groove 61 provided on the elastic sheet 6 and extending in a direction from the other end to one end thereof. The bifurcation grooves can ensure that each movable contact 3 is effectively contacted with the corresponding stationary contact when the heights of the movable contacts 3 are not consistent.

The other end of the rigid movable reed 1 is provided with two opposite lugs 11, and each lug 11 is respectively provided with a shaft hole or a rotating shaft for realizing the rotary connection of the rigid movable reed.

According to the movable spring structure, the flexible deformation structure is arranged, so that not only can one movable contact be arranged, but also a plurality of movable contacts can be arranged according to actual needs, under the condition of the plurality of movable contacts, each movable contact can be effectively contacted with a corresponding fixed contact due to the flexible deformation effect of the flexible deformation structure, and the plurality of movable contacts can realize a multi-group contact parallel connection mode, so that contact temperature rise is reduced, and the effects of high current carrying and low heating are realized. The flexible deformation structure can also realize the overtravel of the contact, improve the contact pressure, make the movable contact with the stationary contact more reliably, and when the movable contact and the stationary contact generate larger electrodynamic force due to short-circuit current, even if the rigid movable reed is repelled, the flexible deformation structure can ensure the reliable contact of the contact through flexible deformation. This is because the flexible deformation structure generates a larger deformation in the contact overstroke state, and can provide a larger contact pressure, thereby being capable of counteracting the electric repulsive force.

Referring to fig. 1 to 11, an electromagnetic relay of the present utility model includes a base 10, a magnetic circuit portion, a stationary spring portion 20, a housing (not shown) and a push card 9, wherein the magnetic circuit portion and the stationary spring portion 20 are respectively disposed on the base 10. The utility model further comprises at least one movable spring structure, wherein the other end of the rigid movable spring plate 1 is rotatably arranged, the armature part 8 of the magnetic circuit part is connected with the movable spring structure through a pushing clamp 9, specifically, one end of the pushing clamp 9 is connected with the armature part 8 of the magnetic circuit part, and the other end of the pushing clamp 9 is connected with the rigid movable spring plate 1 and/or the flexible deformation structure.

The other end of the rigid movable reed is rotatably connected with a rigid movable reed leading-out pin 2, and the rigid movable reed leading-out pin 2 is inserted into the base 10. Specifically, as shown in fig. 7, two lugs 21 are also disposed at one end of the rigid movable spring pin 2, and two lugs 11 of the rigid movable spring 1 are located between two lugs 21 of the rigid movable spring pin 2 and are connected together by a shaft 7. A U-shaped copper foil 4 is electrically connected between one end of the rigid movable spring pin 2 and the other end of the rigid movable spring 1, and the U-shaped copper foil 4 has a certain flexibility and can be replaced by copper wires, aluminum wires, braided wires or the like. Specifically, two ends of the U-shaped copper foil 4 are respectively riveted and fixed with the rigid movable reed 1 and the rigid movable reed pin 2. The U-shaped copper foil 4 is provided with at least one strip hole 41, and the strip hole 41 extends along the length direction of the U-shaped copper foil 4. The number of the elongated holes 41 is specifically, but not limited to, one, and the elongated holes 41 extend toward both ends of the U-shaped copper foil 4, respectively. The provision of the elongated holes 41 can improve the flexibility of the U-shaped copper foil 4. In other embodiments, the other end of the rigid movable spring is rotatably connected to the base, and is electrically connected with a rigid movable spring pin inserted into the base by adopting a flexible conductive member.

The bottom end of the shell is connected with the base 10, and the magnetic circuit part, the static spring part 20, the pushing clamp 9 and the moving spring structure are contained in the shell. The number of the static spring parts 20 and the moving spring structures is two, but not limited to this, and the two moving spring structures are arranged in parallel and are respectively matched with the two static spring parts 20 one by one.

The push card 9 is made of thermosetting materials, the armature part 8 is provided with an elastic clamping structure which deforms under force and passes through the push card 9 in a non-blocking manner in a deformed state, and the elastic clamping structure is released and then is clamped and combined with the push card 9 through restoration. The elastic clamping structure specifically comprises two clamping arms 831 which are distributed in parallel, the two clamping arms 831 are folded inwards relatively by the stress and pass through the pushing card 9 in a folded state, and the two clamping arms 831 are released and then are clamped and assembled with the pushing card 9 by being spread outwards relatively. As shown in fig. 8, the armature portion 8 specifically includes an armature 81, a plastic member 82, and a metal member 83, but is not limited thereto, and in other embodiments, the armature portion is integrally an armature. The armature 81 and the metal piece 83 are insert-molded together by the plastic piece 82, and the armature 81 and the metal piece 83 are separated by the plastic piece 82. The armature portion 8 has an L-shape, but is not limited thereto. The armature portion 8 is provided with a pushing block 832 located between the two clamping arms 831, and the armature portion 8 is provided with a third bifurcation slot 834 between the two clamping arms 831 and the pushing block 832, respectively. Specifically, the pushing block 832 and the clamping arm 831 are respectively disposed on the metal member 83, and the metal member 83 forms the two clamping arms 831 and the pushing block 832 by providing two third bifurcation slots 834. And a limiting groove 833 is respectively arranged at the opposite outer sides of the tail ends of the two clamping arms 831, and the limiting groove 833 penetrates through the two sides of the metal piece 83 in the thickness direction.

As shown in fig. 9, one end of the push card 9 is provided with a card hole 91 adapted to be engaged with the two card arms 831, and the card hole 91 is elongated and extends along the arrangement direction of the two card arms 831. The distance between the two opposite inner side surfaces of the limiting groove 833 is slightly larger than the depth of the clamping hole 91, so that after the two clamping arms 831 are relatively and outwards opened, the two limiting grooves 833 are respectively engaged with the two ends of the clamping hole 91, and the effects of limiting and preventing separation are achieved. The pushing block 832 is also disposed through the card hole 91, and the armature portion 8 drives the pushing card 9 to move through the pushing block 832. The inner side of the clamping hole 91 near the other end of the pushing card 9 is provided with a yielding groove 911 corresponding to the two clamping arms 831, so as to avoid the clamping arms 831, and thus, when the flatness of the two clamping arms 831 and the flatness of the pushing block 832 are inconsistent, the pushing block 832 and the pushing card 9 are prevented from being effectively contacted.

The other end of the rigid movable reed 1 is connected with the pushing card 9, specifically, the rigid movable reed 1 and the flexible deformation structure are connected with each other at a position which is not less than that of the pushing card, so that the rotating power arm of the rigid movable reed 1 and the force arm of the overtravel of the contact are both longer, and the pushing card 9 is pushed more labor-saving. The other end of the pushing card 9 is provided with a first clamping groove 92, the corresponding part of the movable spring structure is provided with a second clamping groove 62, and the first clamping groove 92 and the second clamping groove 62 are mutually meshed together. Because the number of the moving spring structures is two, the number of the first clamping grooves 92 is also two, and the two first clamping grooves 92 are respectively U-shaped and are arranged opposite to each other.

The second clamping groove 62 is specifically formed in the elastic piece 6 and penetrates through the rigid movable reed 1 and the flexible copper foil 5. The three sides of the second clamping groove 62 are respectively provided with a turned-over edge 63 bent towards one side of the thickness direction of the elastic sheet 6, as shown in fig. 3 and 4, the root parts of the turned-over edges 63 are respectively in rounded transition, so that the movable spring structure can be prevented from wiping plastic scraps on the pushing card 9.

The other end of the push card 9 is provided with a push rib 931 for pushing the movable spring structure to act, the push rib 931 and the movable contact 3 are located on the opposite side and extend along the arrangement direction of the plurality of movable contacts 3, so that the utility model can ensure the stress balance of the plurality of movable contacts 3 on the flexible deformation structure and realize synchronous action. The pushing ribs 931 are disposed in parallel with the first clamping grooves 92. Specifically, the other end of the push card 9 is provided with a long rod 93 extending outwards from the notch of the first clamping groove 92 on the side of the first clamping groove 92 near the clamping hole 91, the side of the long rod 93 facing the moving spring structure is provided with the push rib 931 extending along the length direction of the long rod, and after the push card 9 and the moving spring structure are assembled, the push rib 931 is in contact fit with the middle position of the flexible deformation structure in the width direction, as shown in fig. 11.

The utility model relates to an electromagnetic relay, which comprises an armature part 8 and a push card 9, wherein the assembly method comprises the following steps: the two clamping arms 831 of the armature part 8 are clamped by a tool, so that the two clamping arms 831 are folded inwards in opposite directions to form an inner eight shape, the tail ends of the two clamping arms 831 and the tail ends of the pushing blocks 832 pass through the clamping holes 91 of the pushing clamps 9, and then the two clamping arms 831 of the armature part 8 are released, so that the two clamping arms 831 are restored outwards in opposite directions to be opened, and the limiting grooves 833 on the two clamping arms 831 are respectively meshed with the two ends of the clamping holes 91, so that the pushing clamps 9 are stably and firmly connected with the armature part 8, and plastic scraps cannot be scraped in the installation process.

According to the electromagnetic relay, the push card 9 is made of the thermosetting material, so that the high-temperature resistance of the push card 9 can be improved by utilizing the characteristics of high chemical resistance, heat resistance and difficult deformation of the thermosetting material, and the push card 9 is prevented from being heated and melted under the condition of large current carrying to influence the normal operation of the relay. The armature part 8 and the pushing card 9 are assembled in the mode, so that the convenience of connection of the armature part 8 and the pushing card 9 made of thermosetting materials can be improved, and plastic scraps generated by friction between the armature part 8 and the pushing card 9 due to assembly can be avoided. Meanwhile, the push card 9 can synchronously move with the armature part 8, so that the consistency of product parameters is prevented from being influenced by the change of push points of the push card 9.

The electromagnetic relay provided by the utility model can realize the current carrying capacity of 180A of 2 independent contact sets respectively, and can meet the short-circuit current resistance capacity of more than 5 kA.

The utility model relates to an electromagnetic relay, and more particularly, to a structure and a principle of a moving spring structure, and the like, and the description thereof is omitted herein.

The moving spring structure and the electromagnetic relay of the utility model have no related parts (such as other structures of the magnetic circuit part and the like) which are the same as or can be realized by adopting the prior art.

The above embodiment is only used for further illustrating a moving spring structure and an electromagnetic relay of the present utility model, but the present utility model is not limited to the embodiment, and any simple modification, equivalent variation and modification of the above embodiment according to the technical substance of the present utility model falls within the protection scope of the technical solution of the present utility model.

Claims (10)

1. The utility model provides a movable spring structure, includes rigidity movable reed and at least one movable contact, its characterized in that: the flexible deformation structure is electrically connected to one end of the rigid movable reed, and the movable contact is arranged on the flexible deformation structure.

2. The moving spring structure according to claim 1, wherein: the flexible deformation structure comprises at least one flexible conductive piece and at least one elastic piece, one end of the flexible conductive piece and one end of the elastic piece are respectively and electrically connected with one end of the rigid movable reed, and the other end of the flexible conductive piece and the other end of the elastic piece are respectively and electrically connected with the movable contact.

3. The moving spring structure according to claim 2, wherein: the flexible conductive piece is a flexible copper foil, the flexible copper foil and the elastic piece are overlapped together, and the contact surface of the movable contact and the elastic piece are positioned on two sides of the flexible copper foil in the thickness direction.

4. The moving spring structure according to claim 2, wherein: the elastic sheet is made of stainless steel.

5. The moving spring structure according to claim 2, wherein: one end of the flexible conductive piece, one end of the elastic piece and one end of the rigid movable reed are riveted and fixed, and the other end of the flexible conductive piece, the other end of the elastic piece and the movable contact are riveted and fixed.

6. The moving spring structure according to any one of claims 1-5, characterized in that: the number of the movable contacts is multiple, and the movable contacts are arranged in parallel.

7. The moving spring structure according to claim 6, wherein: the flexible deformation structure is provided with a bifurcation groove between adjacent movable contacts.

8. The moving spring structure according to claim 1, wherein: the other end of the rigid movable reed is provided with two opposite lugs, and each lug is respectively provided with a shaft hole or a rotating shaft for realizing the rotary connection of the rigid movable reed.

9. An electromagnetic relay comprising a magnetic circuit portion and a pusher card, characterized in that: the spring structure of any one of claims 1-8, wherein the other end of the rigid movable spring is rotatably arranged, and the armature part of the magnetic circuit part is connected with the movable spring structure through a pushing clamp.

10. The electromagnetic relay according to claim 9, wherein: the pushing clamp is provided with a first clamping groove, the movable spring structure is provided with a second clamping groove, and the first clamping groove and the second clamping groove are mutually meshed together; the second clamping groove is positioned at one end of the rigid movable reed; the number of the movable contacts is multiple, and the movable contacts are arranged at intervals along the width direction of the rigid movable reed; the pushing card is provided with a pushing rib for pushing the movable spring structure to act, and the pushing rib and the movable contacts are positioned on the back side and the opposite side and extend along the arrangement direction of the plurality of movable contacts.