CN219497672U - Multi-contact movable reed and electromagnetic relay thereof - Google Patents

Abstract

The utility model discloses a multi-contact movable reed and an electromagnetic relay thereof, wherein the multi-contact movable reed comprises a movable reed body; the movable reed body is provided with at least one slit upwards from the root part, so that the movable reed body forms at least two swinging pieces which can swing freely relative to the root part, and one surface of the free end part of each swinging piece is respectively fixed with a movable contact; one of the swinging pieces is provided with an extending part which is matched with a clamping groove of the pushing card from the connecting part of the movable contact upwards, the movable contact of the one swinging piece is fixedly connected with a connecting sheet, the connecting sheet extends to the side edge and elastically abuts against the adjacent swinging piece, and the gap difference between the contact of the one swinging piece and the adjacent contact is adjusted by adjusting the height difference matched between the connecting sheet and the adjacent swinging piece. The utility model can prevent the gap difference caused by the inclination of the push card, and can adjust the gap difference according to the requirement while keeping the consistency of the contact gap.

Description

Multi-contact movable reed and electromagnetic relay thereof

Technical Field

The utility model relates to the technical field of relays, in particular to a multi-contact movable reed and an electromagnetic relay thereof.

Background

A relay is an electronically controlled device having a control system (also known as an input loop) and a controlled system (also known as an output loop), commonly used in automatic control circuits, which in effect is an "automatic switch" that uses a small current to control a large current. Therefore, the circuit plays roles of automatic regulation, safety protection, circuit switching and the like. The relay belongs to a heat-resistant element, and when the temperature exceeds the tolerable temperature, the ageing of internal plastic and insulating materials of the relay can be accelerated, so that the contacts are oxidized and corroded to cause difficult arc extinguishing, the technical parameters of the electric element decay, the reliability is reduced, and the like.

In order to make the contact resistance rise in low temperature, a relay with a multipath contact structure in the prior art, a movable spring part comprises a movable contact, a movable reed and a movable reed leading-out sheet; one end of the movable reed is connected with one end of the movable reed leading-out sheet, and the other end of the movable reed is fixedly connected with the movable contact. Two strip slits extend from the end head to the connecting position of one end of the movable reed and the movable reed leading-out sheet so as to divide the movable reed into three current-carrying conductors; the movable contacts are three and are respectively fixed on corresponding current-carrying conductors, so that the movable reed is divided into three paths of parallel structures. The structure designs the contact component into a multi-group contact micro-parallel structure, so that the current passing through each current carrying conductor is reduced, and the temperature rise can be reduced. And in order to ensure consistent contact gap during disconnection, the fluctuation of the contact gap difference caused by non-horizontal pushing of the pushing card is reduced. In the movable reed of the prior art, a connecting sheet is also arranged on one surface facing the stationary contact, and the connecting sheet is connected between the movable contacts. The arrangement completely fixes the connecting sheet and the three movable contacts, and although the consistency of the contact gaps can be maintained, the contact gaps can not be adjusted, and the use requirements can not be met under certain specific conditions. Therefore, how to adjust the gap difference according to the requirement while maintaining the consistency of the contact gap becomes a problem to be solved urgently.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a multi-contact movable reed and an electromagnetic relay thereof, wherein the structure is improved to ensure that two sides of a connecting sheet respectively extend to two sides and elastically support against two swinging pieces on two sides, so that the gap consistency of the contacts is maintained, and the gap difference between a middle contact and contacts on two sides can be adjusted by adjusting the height difference matched between two ends of the connecting sheet and the two swinging pieces on two sides.

The technical scheme adopted for solving the technical problems is as follows: a multi-contact movable reed comprises a movable reed body; the movable reed body is provided with at least one slit upwards from the root part, so that the movable reed body forms at least two swinging pieces which can swing freely relative to the root part, and one surface of the free end part of each swinging piece is respectively fixed with a movable contact; one of the swinging pieces is provided with an extending part which is matched with a clamping groove of the pushing card from the connecting part of the movable contact upwards, the movable contact of the one swinging piece is fixedly connected with a connecting sheet, the connecting sheet extends to the side edge and elastically abuts against the adjacent swinging piece, and the gap difference between the contact of the one swinging piece and the adjacent contact is adjusted by adjusting the height difference matched between the connecting sheet and the adjacent swinging piece.

The swinging pieces are odd-numbered, the extension part is arranged in the middle swinging piece in the swinging pieces, two sides of the connecting piece extend towards two sides respectively and elastically support against the swinging pieces on two sides, and the gap difference between the middle contact and the contacts on two sides is adjusted by adjusting the height difference between the two ends of the connecting piece and the swinging pieces on two sides.

And the two sides of the extending part of one swinging piece are respectively provided with a flanging structure, so that friction between the movable reed and the pushing card is reduced by bending of the flanging structure to generate scraping.

The connecting piece is fixed on one surface of one swinging piece.

The connecting piece extends upwards to be flush with the extending part, and the tail end of the connecting piece is provided with a bending.

And a U-shaped bend is arranged between the connecting part of the connecting piece and the middle movable contact and the tail end of the connecting piece.

At least one double-V-shaped bending is arranged on the matching section of the connecting piece and the adjacent swinging piece, and two V-shaped bending in each double-V-shaped bending of the at least one double-V-shaped bending are reversely arranged and are elastically abutted to the corresponding swinging piece close to the swinging piece; the unfolding plane of the double V-shaped bending is in a trapezoid-like arrangement.

The movable reed body is formed by stacking a plurality of reeds together; the flanging structure is arranged on one first reed which is close to the outer side of one surface of the free end part of the swinging piece, the flanging structures on two sides are respectively bent towards the second reed, and the two sides of the second reed are respectively provided with a abdication structure.

The movable contact of one of the swinging pieces and the movable contact of the adjacent swinging piece are distributed in a dislocation mode, the movable contact of one of the swinging pieces is larger than the movable contact of the adjacent swinging piece, and the reed width of one of the swinging pieces is larger than the reed width of the adjacent swinging piece.

An electromagnetic relay comprising the multi-contact movable reed according to any one of the above.

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

1. because the utility model adopts the structure that one of the swinging pieces is upwards provided with the extension part which is used for being matched with the clamping groove of the pushing card from the connecting part of the movable contact, the movable contact of one of the swinging pieces is fixedly connected with a connecting sheet, and the connecting sheet extends to the side and elastically props against the adjacent swinging piece. According to the structure, when the connecting sheet pushes one swinging piece, the other swinging pieces are driven to move by pushing the card, so that the gap difference caused by the skew of the pushing card is avoided; and the gap difference between the contact of one swinging piece and the adjacent contact can be adjusted by adjusting the height difference matched between the connecting piece and the adjacent swinging piece, so that the contact gap consistency can be maintained, and the gap difference can be adjusted according to actual requirements.

2. According to the utility model, as the flanging structures are respectively arranged on the two sides of the extension part of one swinging piece. According to the structure, the bending of the flanging structure of the movable reed is utilized to contact with the pushing card, so that friction between the movable reed and the pushing card during swinging is reduced, and generation of scraping scraps is reduced.

3. Because the connecting sheet is adopted to extend upwards to be level with the extending part, the tail end of the connecting sheet is provided with a bending.

The structure of the utility model can limit the pushing card so as to prevent the pushing card from being separated.

4. Because the U-shaped bending is arranged between the connecting part and the tail end of the middle movable contact in the connecting piece. The structure of the utility model reduces the rigidity of the connecting sheet, can prevent permanent deformation after long-time movement and ensures the maintenance of gap difference.

5. Because the connecting piece is adopted, at least one double-V-shaped bending is arranged on the matching section of the connecting piece and the adjacent swinging piece, and two V-shaped bending in each double-V-shaped bending of the at least one double-V-shaped bending are reversely arranged and elastically abutted against the corresponding swinging piece in the V-shaped bending close to the swinging piece; the unfolding plane of the double V-shaped bending is in a trapezoid-like arrangement. The structure of the utility model ensures that the contact points are in cambered surface line contact, reduces friction force between the contact points and ensures that the contact points are more stable. And because the unfolding plane of the V-shaped bending is in a trapezoid-like shape, the deformation position is ensured to be at the contact position, the root deformation is small, and the displacement of the middle contact can be transmitted more reliably.

6. The movable contact of one of the swinging pieces and the movable contact of the adjacent swinging piece are distributed in a dislocation way, the movable contact of one of the swinging pieces is larger than the movable contact of the adjacent swinging piece, and the reed width of one of the swinging pieces is larger than the reed width of the adjacent swinging piece. In this structure of the present utility model, the movable contact of one swinging member is the largest, and the corresponding slot width is the largest, so as to ensure that the current flowing through the swinging member is the largest. And because the deformation of the large width is difficult, the deformation of one reed of the swinging piece is small, the contact gap is indirectly minimized, the arcing during the service life is generated on the large contact with the minimum gap, and the service life reliability is ensured.

The utility model is described in further detail below with reference to the drawings and examples; the multi-contact movable reed and the electromagnetic relay thereof of the present utility model are not limited to the embodiments.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of a three-contact movable contact spring according to a first embodiment of the present utility model;

fig. 2 is a front view of an embodiment of a three-contact movable contact spring according to a first embodiment of the present utility model;

fig. 3 is a side view of an embodiment of a three-contact movable contact spring according to a first embodiment of the present utility model;

FIG. 4 is an enlarged schematic view at A in FIG. 3;

fig. 5 is a schematic current-carrying diagram of an embodiment of a three-contact movable contact spring according to a first embodiment of the present utility model;

fig. 6 is a partially schematic construction view of an embodiment of an electromagnetic relay of the present utility model;

fig. 7 is a schematic perspective view of a two-contact movable contact spring according to a second embodiment of the present utility model;

fig. 8 is a plan view of an embodiment of a two-contact movable contact spring according to a second embodiment of the present utility model;

fig. 9 is a side view of an embodiment of a two-contact movable contact spring of a second embodiment of the present utility model;

fig. 10 is a schematic perspective view of a five-contact movable contact spring according to a third embodiment of the present utility model;

fig. 11 is a top view of an embodiment of a five-contact movable contact spring of a third embodiment of the present utility model;

fig. 12 is a side view of an embodiment of a five-contact movable contact spring of a third embodiment of the present utility model.

Detailed Description

Example 1

Referring to fig. 1 to 5, in the embodiment of the present utility model, the swing member is an odd number of moving springs, and the moving springs are three-contact moving springs, including a moving spring body 1; the movable reed body 1 is provided with two slits upwards from the root part, so that the movable reed body 1 forms three swinging pieces 11, 12 and 13 which can swing freely relative to the root part, and one surface of the free end parts of the three swinging pieces is respectively fixed with a movable contact 3, namely movable contacts 31, 32 and 33; the middle swinging piece 12 of the three swinging pieces is upwards provided with an extension part 121 which is used for being matched with a clamping groove of the push card 2 by the connecting part of the movable contact 32, the movable contact 32 of the middle swinging piece 12 is fixedly connected with a connecting piece 4, two sides of the connecting piece 4 respectively extend to two sides and elastically support against the two swinging pieces 11 and 13 on two sides, and the gap difference between the middle contact and the contacts on two sides is adjusted by adjusting the height difference of the two ends of the connecting piece 4 matched with the two swinging pieces 11 and 13 on two sides.

In this embodiment, the two sides of the extension portion 121 of the middle swinging member 12 are respectively provided with a flanging structure 122, so that the friction between the movable reed 1 and the pushing card 2 is reduced by bending the flanging structure 122 to generate scraping.

In this embodiment, the connecting piece 4 is fixed to the one face of the intermediate swinging member 12. The connecting piece 4 extends upwards to be flush with the extension 121, and is provided with a bend 41 at its end. In the connecting piece 4, a U-shaped bend 42 is provided between the connecting part with the middle movable contact 3 and the tail end. In the connecting piece 4, double V-shaped bends 43 and 44 are arranged at the matching sections of the two swinging pieces 11 and 13 at the two sides, the two V-shaped bends 43 and 44 are reversely arranged, and the V-shaped bends 44 close to the swinging pieces elastically abut against the corresponding swinging pieces; the unfolding planes of the double V-shaped bends 43 and 44 are arranged like a trapezoid.

In this embodiment, a compression spring 5 is further connected to one side of the three swinging members facing away from the movable contacts 31, 32 and 33, the root of the compression spring 5 is fixed to the fixing positions of the three movable contacts 31, 32 and 33 of the swinging members respectively, and the tail ends of the compression springs 5 are three bifurcated sheets and extend to corresponding clamping grooves of the push card 2 respectively.

In this embodiment, the movable reed body 1 is formed by stacking a plurality of reeds together; the flanging structure 122 is disposed on a first reed 14 corresponding to the free end of the swinging member 12, wherein one side of the first reed is located outside, the flanging structures 122 on two sides are respectively bent towards the second reed 15, and the two sides of the second reed 15 are respectively provided with a yielding structure 151.

In the embodiment, the movable reed body 1 is formed by stacking four leaf spring sheets together; wherein the first reed 14, the second reed 15 and the third reed 16 are respectively provided with corresponding extending parts, and the fourth reed 17 is not provided with extending parts. Among the first reed 14, the second reed 15 and the third reed 16 of the three swinging members, the connection part of the movable contacts 31, 32 and 33 and the root part are bent into a U-shaped shape 18, and the U-shaped opening is connected with one surface facing away from the movable contacts 31, 32 and 33.

In this embodiment, the movable contact 32 of the middle one of the three swinging members 12 and the movable contacts 31 and 33 of the swinging members 11 and 13 on the two sides are distributed in a staggered manner, the movable contact 32 of the middle one of the three swinging members 12 is larger than the movable contacts 31 and 33 of the adjacent swinging members 11 and 13, and the reed width of the middle one of the three swinging members 12 is larger than the reed width of the adjacent swinging members 11 and 13.

Referring to fig. 6, an electromagnetic relay of the present utility model includes a three-contact movable reed 1 as described in any one of the above. The relay is characterized by further comprising a fixed spring 61, a fixed contact 62, a magnetic circuit part 7, an armature assembly 8 and a movable spring leading-out sheet 9, wherein a first armature, a second armature and magnetic steel of the armature assembly 8 are combined into an integral piece with an I-shaped structure through plastic pieces, yokes of the magnetic circuit part 7 are matched with openings on two sides of the I-shaped structure of the armature assembly 8, the fixed contact 62 is fixed at one end of the fixed spring 61, the other end of the fixed spring 61 is usually used as a leading-out part and extends out of a shell of the relay, one end of a movable contact 31, 32 and 33 of a movable contact spring 1 is fixed, the other end of the movable contact spring leading-out sheet 9 is fixed at one end of the movable contact spring leading-out sheet 9 and extends out of the shell of the relay, the movable contacts 31, 32 and 33 are positioned at matched positions with the fixed contact 62 through plastic pushing arms 81, and the armature assembly 8 is matched with one end of a pushing card 2, and the other end of the pushing card 2 is matched with the movable contact spring 1.

The utility model relates to a multi-contact movable reed and an electromagnetic relay thereof, wherein an extending part 121 which is used for being matched with a clamping groove of a push card is upwards arranged at the connecting position of one swinging piece of each swinging piece, a connecting piece 4 is fixedly connected at the movable contact of one swinging piece, and the connecting piece 4 extends to the side edge and elastically abuts against the adjacent swinging piece. According to the structure, when the connecting sheet pushes one swinging piece, the other swinging pieces are driven to move by pushing the card, so that the gap difference caused by the skew of the pushing card is avoided; and the gap difference between the contact of one swinging piece and the adjacent contact can be adjusted by adjusting the height difference matched between the connecting piece and the adjacent swinging piece, so that the contact gap consistency can be maintained, and the gap difference can be adjusted according to actual requirements.

The utility model relates to a multi-contact movable reed and an electromagnetic relay thereof, wherein flanging structures 122 are respectively arranged on two sides of an extension part 121 of one swinging piece. According to the structure, the bending of the flanging structure 122 of the movable reed is utilized to contact with the pushing card 2, so that friction between the movable reed and the pushing card during swinging is reduced, and generation of scraping scraps is reduced.

The multi-contact movable reed and the electromagnetic relay thereof adopt the connecting piece 4 to extend upwards to be level with the extending part 121, and the tail end of the connecting piece is provided with a bending 41. The structure of the utility model can limit the pushing card 2 to prevent the pushing card 2 from being separated.

The utility model relates to a multi-contact movable reed and an electromagnetic relay thereof, wherein a U-shaped bending 42 is arranged between the connecting part of the connecting piece 4 and a middle movable contact 3 and the tail end. The structure of the utility model reduces the rigidity of the connecting sheet, can prevent permanent deformation after long-time movement and ensures the maintenance of gap difference.

In the connecting sheet 4, double V-shaped bends 43 and 44 are arranged at the matching sections of the two swinging pieces 11 and 13 at two sides, the two V-shaped bends 43 and 44 in each double V-shaped bend of the at least one double V-shaped bend are reversely arranged, and the V-shaped bends 44 close to the swinging pieces elastically support against the corresponding swinging pieces; the unfolding planes of the double V-shaped bends 43 and 44 are arranged like a trapezoid. The structure of the utility model ensures that the contact points are in cambered surface line contact, reduces friction force between the contact points and ensures that the contact points are more stable; and because the unfolding plane of the V-shaped bending is in a trapezoid-like shape, the deformation position is ensured to be at the contact position, the root deformation is small, and the displacement of the middle contact can be transmitted more reliably.

The utility model relates to a multi-contact movable reed and an electromagnetic relay thereof, wherein movable contacts of one swinging piece and movable contacts of adjacent swinging pieces are distributed in a dislocation way, the movable contact of one swinging piece is larger than the movable contact of the adjacent swinging piece, and the reed width of one swinging piece is larger than the reed width of the adjacent swinging piece. The structure of the utility model, wherein the movable contact of one swinging piece is the largest, and the corresponding grooving width is the largest, so as to ensure that the current flowing through the swinging piece is the largest. And because the deformation of the large width is difficult, the deformation of the reed of one swinging piece is small, the contact gap is indirectly minimized, the arcing during the service life is generated on the large contact with the minimum gap, and the service life reliability is ensured.

Example two

Referring to fig. 7-9, the difference between the multi-contact movable reed and the electromagnetic relay of the present utility model and the first embodiment is that the movable reed is a two-contact movable reed, the movable reed body 1 is provided with a slit from the root portion to the top, so that the movable reed body forms two swinging members 11, 12 capable of swinging freely relative to the root portion, one of the free end portions of each swinging member is fixed with a movable contact, namely movable contacts 31, 32, respectively, an extension portion 121 for matching with a clamping groove of the push card 2 is provided upwards at the connection portion of the swinging member 12 by the movable contact 32, and a connecting piece 4 is also fixedly connected at the movable contact 32 of the swinging member 12. The movable contact 32 of the swinging member 12 and the movable contact 31 of the swinging member 11 are distributed in a dislocation manner, the movable contact 32 of the swinging member 12 is larger than the movable contact 3 of the swinging member 11, and the reed width of the swinging member 12 is larger than the reed width of the swinging member 11.

Example III

Referring to fig. 10-12, the first difference between the multi-contact movable reed and the electromagnetic relay thereof of the present utility model is that the movable reed is a five-contact movable reed, four slits are opened upwards from the root of the movable reed body 1, so that the movable reed body forms five swinging members 11, 12, 13, 19, 20 capable of swinging freely relative to the root, one surface of the free end of each swinging member is fixed with a movable contact, namely movable contacts 31, 32, 33, 34, 35, respectively, an extension 121 for matching with a clamping slot of the push card 2 is provided upwards at the joint of the swinging member 12 with the movable contact 32, and a connecting piece 4 is also fixedly connected at the movable contact 32 of the swinging member 12; in the connecting sheet 4, two double-V-shaped bends are arranged at the matching sections of the four swinging pieces on two sides, and the V-shaped bends are respectively 43, 44, 45 and 46. The movable contact 32 of the swinging member 12 and the other four movable contacts 31, 33, 34 and 35 are distributed in a dislocation manner, the movable contact 32 of the swinging member 12 is larger than the movable contacts 31, 33, 34 and 35, and the reed width of the middle swinging member 12 is larger than the reed widths of the swinging members 11, 13, 19 and 20.

The foregoing is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or be modified to equivalent embodiments, without departing from the scope of the technology. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims (10)

1. A multi-contact movable reed comprises a movable reed body; the movable reed body is provided with at least one slit upwards from the root part, so that the movable reed body forms at least two swinging pieces which can swing freely relative to the root part, and one surface of the free end part of each swinging piece is respectively fixed with a movable contact; the method is characterized in that: one of the swinging pieces is provided with an extending part which is matched with a clamping groove of the pushing card from the connecting part of the movable contact upwards, the movable contact of the one swinging piece is fixedly connected with a connecting sheet, the connecting sheet extends to the side edge and elastically abuts against the adjacent swinging piece, and the gap difference between the contact of the one swinging piece and the adjacent contact is adjusted by adjusting the height difference matched between the connecting sheet and the adjacent swinging piece.

2. The multi-contact movable contact spring according to claim 1, wherein: the swinging pieces are odd-numbered, the extension part is arranged in the middle swinging piece in the swinging pieces, two sides of the connecting piece extend towards two sides respectively and elastically support against the swinging pieces on two sides, and the gap difference between the middle contact and the contacts on two sides is adjusted by adjusting the height difference between the two ends of the connecting piece and the swinging pieces on two sides.

3. The multi-contact movable reed according to claim 1 or 2, characterized in that: and the two sides of the extending part of one swinging piece are respectively provided with a flanging structure, so that friction between the movable reed and the pushing card is reduced by bending of the flanging structure to generate scraping.

4. The multi-contact movable contact spring according to claim 1, wherein: the connecting piece is fixed on one surface of one swinging piece.

5. The multiple-contact movable contact spring according to claim 4, wherein: the connecting piece extends upwards to be flush with the extending part, and the tail end of the connecting piece is provided with a bending.

6. The multiple-contact movable contact spring according to claim 5, wherein: and a U-shaped bend is arranged between the connecting part of the connecting piece and the middle movable contact and the tail end of the connecting piece.

7. The multi-contact movable contact spring according to claim 1, wherein: at least one double-V-shaped bending is arranged on the matching section of the connecting piece and the adjacent swinging piece, and two V-shaped bending in each double-V-shaped bending of the at least one double-V-shaped bending are reversely arranged and are elastically abutted to the corresponding swinging piece close to the swinging piece; the unfolding plane of the double V-shaped bending is in a trapezoid-like arrangement.

8. A multiple-contact movable contact spring according to claim 3, wherein: the movable reed body is formed by stacking a plurality of reeds together; the flanging structure is arranged on one first reed which is close to the outer side of one surface of the free end part of the swinging piece, the flanging structures on two sides are respectively bent towards the second reed, and the two sides of the second reed are respectively provided with a abdication structure.

9. The multi-contact movable contact spring according to claim 1, wherein: the movable contact of one of the swinging pieces and the movable contact of the adjacent swinging piece are distributed in a dislocation mode, the movable contact of one of the swinging pieces is larger than the movable contact of the adjacent swinging piece, and the reed width of one of the swinging pieces is larger than the reed width of the adjacent swinging piece.

10. An electromagnetic relay, characterized in that: comprising a multi-contact movable reed as claimed in any one of claims 1 to 9.