Relay

Abstract

The utility model discloses a relay, which comprises a base, a magnetic circuit part and a contact part, the magnetic circuit part and the contact part are mounted on the base, the contact part comprises a movable spring part and a static spring part which are matched with each other, and an armature of the magnetic circuit part is matched with the movable spring part through a pushing card; the movable spring part comprises a first movable spring sheet and a movable contact arranged at one end of the first movable spring sheet; the two sides of one end of the first movable contact spring in the width direction of the first movable contact spring are respectively provided with an elastically deformable fin, each fin is provided with a first through groove, and the pushing card is provided with a pushing part corresponding to each fin at the position of one side, far away from the movable contact, of the first through groove, so that the pushing parts are used for pushing the positions. According to the utility model, the fins are good in flexibility and large in deformation, so that the over-travel of the contact can be better realized.

Description

Technical Field

[0001] The utility model relates to the field of relays, in particular to a relay. Background Art

[0002] As an electromechanical component, relays have been widely used. Conventional small relays generally include a base, a magnetic circuit part and a contact part arranged on the base. The contact part includes a movable spring part and a static spring part that cooperate with each other. The armature of the magnetic circuit part cooperates with the movable spring part through a push card. Specifically, a limit slot is provided on the movable spring piece of the movable spring part, and the limit hole is plugged and matched with a push column corresponding to the push card. In order to increase the current carrying capacity, the movable spring part usually adopts a method of superimposing and connecting multiple movable spring pieces. Therefore, when the push card cooperates with the movable spring part, it will push each movable spring piece at the same time. After the movable spring part adopts the stacking form, its flexibility is greatly reduced, resulting in a small deformation when the push card pushes the movable spring piece, which is not conducive to achieving contact overtravel. In order to solve this problem, some existing technologies have a long groove in the head of one of the movable spring pieces, and the head of the movable spring part is divided into a main body part with a movable contact and a split part located on the left and right sides of the main body. The long groove is used to improve the flexibility of the split part, so that the push card drives the movable spring part to move and achieve contact overtravel by pushing the split part. However, since the long slot is covered by another movable spring, the flexibility of the split part is poor and the deformation is small, resulting in a poor contact overtravel effect. Utility Model Content

[0003] The utility model aims at the technical problems existing in the prior art and provides a relay, which improves the structure of the dynamic spring part so that the flexibility of the deformation part is greater, and the contact overtravel can be better achieved.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a relay comprises a base, and a magnetic circuit part and a contact part installed on the base, the contact part comprises a movable spring part and a static spring part which cooperate with each other, the armature of the magnetic circuit part cooperates with the movable spring part through a pushing card; the movable spring part comprises a first movable spring piece and a movable contact arranged at one end of the first movable spring piece; one end of the first movable spring piece is respectively provided with elastically deformable wings on both sides in the width direction thereof, the wing is provided with a first through slot, and the pushing card is respectively provided with a pushing part at a position on a side of the first through slot away from the movable contact corresponding to each wing, so as to push the position.

[0005] Furthermore, the first through slot is in the shape of an elongated strip, and one end of the first through slot faces one side of the first movable spring piece in the length direction, and the other end of the first through slot faces the other side of the first movable spring piece in the length direction; one end of the first through slot is closed, and the other end is open.

[0006] Furthermore, a second through slot is provided between the wing and the first movable spring piece, and the second through slot is in the shape of a long strip with one end closed and the other end open, and one end of the second through slot faces the other side of the first movable spring piece in the length direction, and the other end faces one side of the first movable spring piece in the length direction.

[0007] Further, the other side of the first movable spring piece in the length direction is a side corresponding to the extension direction of one end of the first movable spring piece.

[0008] Furthermore, the movable spring part also includes at least one second movable spring piece, which is superimposed and connected with the first movable spring piece, and one end of the second movable spring piece is relatively fixed to the movable contact; the wing piece protrudes laterally from the second movable spring piece.

[0009] Furthermore, the second movable spring piece is located on a side of the first movable spring piece facing the push card, and the second movable spring piece is provided with an arc-shaped arch.

[0010] Furthermore, the laminated structure formed by the superposition of the first movable spring piece and the second movable spring piece is bent so that the laminated structure is L-shaped, and the other end of the first movable spring piece and the other end of the second movable spring piece are connected to movable spring lead-out pins.

[0011] Furthermore, the push card is rotatably connected to the base, and the rotation axis of the push card is located in the width direction of the first movable spring piece.

[0012] Furthermore, the magnetic circuit part is vertical and inverted on the base, and the push card has two legs distributed along the width direction of the dynamic spring part, the two legs extend downward respectively, and the bottoms of the two legs are rotatably connected to the base respectively.

[0013] Furthermore, the bottoms of the two legs are respectively provided with a rotating shaft portion, and the rotating shaft portions of the two legs extend in the same direction; the base is respectively provided with an axis hole corresponding to each rotating shaft portion, and the rotating shaft portion is movably inserted into the corresponding axis hole.

[0014] Furthermore, it also includes a shell with an opening at the bottom end, the bottom end of the shell is connected to the base, and the magnetic circuit part, the contact part, and the push card are contained in its shell cavity; the push card is provided with one or more protrusions on the side opposite to the inner side of the shell, and the protrusion is hemispherical or arc-shaped, so that the protrusion and the shell are in point-to-surface cooperation or line-to-surface cooperation when in contact; the push card is provided with a force block on the side facing the armature to receive the push of the armature; the pushing portion is columnar.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. Since one end of the first moving spring piece is provided with elastically deformable wings on both sides in the width direction thereof, and the wings are provided with a first through slot, the push card is provided with a push portion at the position of each wing on the side of the second through slot away from the moving contact, so as to push the position, so that the push card of the utility model can directly push the wing to deform to achieve contact overtravel, and the wing is provided with the first through slot, so that the wing is more flexible and deformed, and can better achieve contact overtravel, thereby providing the relay with breaking force and dynamic closing pressure to meet the electrical durability requirements. Moreover, the utility model enables the moving spring part to achieve contact overtravel by utilizing the deformation of the wing even if it adopts a multi-piece stacking form.

[0017] 2. The first through slot is in the shape of a long strip with one end closed and the other end open, and one end of the first through slot faces one side of the first movable spring piece in the length direction, and the other end faces the other side of the first movable spring piece in the length direction, so that the wing piece has better flexibility at the side of the second through slot away from the moving contact, and its deformation amount is larger.

[0018] 3. Since a second through slot is provided between the wing and the first movable spring piece, the second through slot is in the shape of a long strip with one end closed and the other end open, and one end of the second through slot is toward the other side of the first movable spring piece in the length direction, and the other end is toward one side of the first movable spring piece in the length direction, the utility model can utilize the second through slot to further improve the flexibility of the wing piece and make its deformation greater.

[0019] 4. The utility model rotatably connects the push card to the base, which can limit the position of the push card and prevent the push card from shifting when the product is impacted or vibrated. In particular, the two legs of the push card extend in the same direction, so that the push card adopts an asymmetric side-mounted shaft structure, thereby avoiding the problem of plastic chips caused by interference insertion or assembly with metal, and simplifying assembly.

[0020] 5. The convex part added on the side of the push card realizes line-surface contact or point-surface contact with the inner side of the shell, which can reduce the friction between the push card and the shell and make the push card rotate more smoothly.

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments; however, a relay of the utility model is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model (excluding the housing);

[0023] Figure 2 It is a cross-sectional view of the utility model (excluding the housing);

[0024] Figure 3This is a three-dimensional structure diagram of the dynamic spring part of the utility model. Figure 1 ;

[0025] Figure 4 This is a three-dimensional structure diagram of the dynamic spring part of the utility model. Figure 2 ;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the push card of the utility model. Figure 1 ;

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the push card of the utility model. Figure 2 ;

[0028] Figure 7 It is a three-dimensional structural schematic diagram of the base of the utility model;

[0029] In the figure, 1, base, 11, shaft hole, 2, magnetic circuit part, 21, coil frame, 22, coil, 23, armature, 24, yoke, 25, iron core, 26, restoring spring, 3, moving spring part, 31, first moving spring, 311, wing, 312, bending first, 313, notch groove, 314, arc arch, 32, second moving spring, 33, moving contact, 34, moving spring lead-out foot, 4, static spring part, 41, static contact, 5, push card, 51, push part, 52, force block, 53, support foot, 54, shaft part, 55, convex part. DETAILED DESCRIPTION

[0030] In the present utility model, the terms "first", "second", "third", etc. are only used to distinguish similar objects, not to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "plurality" means two or more. In the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] See also Figure 1-Figure 7As shown, a relay of the utility model comprises a base 1, and a magnetic circuit part 2 and a contact part mounted on the base 1, wherein the contact part comprises a movable spring part 3 and a static spring part 4 which cooperate with each other, and the armature 23 of the magnetic circuit part 2 cooperates with the movable spring part 3 through a push card 5. The movable spring part 3 comprises a first movable spring piece 31 and a movable contact 33 arranged at one end of the first movable spring piece 31. One end of the first movable spring piece 31 is respectively provided with elastically deformable single-piece wing pieces 311 on both sides of the first movable spring piece 31 in the width direction, and the wing piece 311 is provided with a first through slot 312, which is in the shape of a long strip with one end closed and the other end open, and one end of the first through slot 312 faces one side of the first movable spring piece 31 in the length direction, and the other end faces the other side of the first movable spring piece 31 in the length direction. The push card is respectively provided with a pushing portion 51 at the position outside the first through slot 312 corresponding to each wing piece 311, so as to push the position. A force block 52 is provided on the side of the push card 5 facing the armature 23 to receive the push of the armature 23. The push parts 51 of the push card 5 are respectively in a columnar shape, but are not limited thereto. Figure 3 The direction of the Y axis of the three-dimensional coordinate system corresponds to the thickness direction of the first movable spring 31. Figure 3 The direction of the X-axis of the three-dimensional coordinate system is the length direction of the first movable spring 31 corresponding to Figure 3 The direction of the Z axis of the three-dimensional coordinate system.

[0032] Furthermore, a second through slot 313 is respectively provided between each wing 311 and the first movable spring piece 31. The second through slot 313 is in the shape of a strip with one end closed and the other end open, and one end of the second through slot 313 faces the other side of the first movable spring piece 31 in the length direction, and the other end faces one side of the first movable spring piece 31 in the length direction. The other side of the first movable spring piece 31 in the length direction is specifically a side corresponding to the extension direction of one end of the first movable spring piece 31, but is not limited thereto.

[0033] As a preferred structure, the movable spring part also includes at least one second movable spring piece 32, which is superimposed and connected with the first movable spring piece 31, and one end of the second movable spring piece 32 is relatively fixed to the movable contact 33. Therefore, the movable spring part 3 of the utility model adopts a laminated structure, which can effectively increase the current carrying capacity and save space. Each wing protrudes laterally from the second movable spring piece 32 to avoid the second movable spring piece 32 interfering with the deformation of the wing. The second movable spring piece 32 is located on the side of the first movable spring piece 31 facing the push card, and the second movable spring piece 32 is provided with an arc-shaped arch.

[0034] In this embodiment, the laminated structure formed by the superposition of the first movable spring piece 31 and the second movable spring piece 32 is bent so that the laminated structure is L-shaped, and the other end of the first movable spring piece 31 and the other end of the second movable spring piece 32 are connected to the movable spring lead-out pin 34. In this way, it is beneficial to reduce the height of the first movable spring piece 31, thereby facilitating the miniaturization design of the product. Since the first movable spring piece 31 is superimposed and connected with the second movable spring piece 32, the other end of the second movable spring piece 32 is also bent.

[0035] As a preferred structure, the push card 5 is rotatably connected to the base 1, and the rotation axis of the push card 5 is located in the width direction of the dynamic spring part. In this way, the push card 5 can play a certain limiting role to prevent the push card 5 from shifting when the product is impacted or vibrated.

[0036] In this embodiment, the magnetic circuit part 2 is vertical and inverted on the base 1. Specifically, in addition to the armature 23, the magnetic circuit part 2 also includes a coil frame 21, a coil 22 wound on the coil frame 21, a yoke 24, an iron core 25, and a restoring spring. The coil frame 21 is vertically placed on the base 1, and the iron core 25 is inserted into a through hole in the middle of the coil frame 21. The yoke 24 is L-shaped, and one side of it is connected to the upper end of the iron core 25, and the other side is located outside the coil frame 21 and extends downward; the armature 23 is limited at the edge of the other side of the yoke 24 by the restoring spring 26, and the armature 23 is L-shaped, one side of the armature 23 is located below the coil frame 21, and corresponds to the lower end of the iron core 25, and the other side of the armature 23 is located outside the other side of the yoke 24, and cooperates with the force block 52 of the push card 5.

[0037] The push card 5 has two legs 53 distributed along the width direction of the movable spring part 3, the two legs 53 extend downward respectively, and the bottoms of the two legs 53 are rotatably connected to the base 1 respectively. Specifically, the bottoms of the two legs 53 are respectively provided with a shaft portion 54, and the shaft portions 54 of the two legs 53 extend in the same direction; the base 1 is respectively provided with an axis hole 11 corresponding to each shaft portion 54, and the shaft portion 54 is movably inserted into the corresponding shaft hole 11. Therefore, the push card 5 of the utility model adopts an asymmetric side-mounted shaft structure, so as to avoid the problem of plastic chips generated by interference insertion or assembly with metal of the push card 5, and realize simple assembly.

[0038] The utility model also includes a shell with an opening at the bottom (not shown in the figure), the bottom of which is connected to the base 1 and contains the magnetic circuit part 2, the contact part and the push card 5 in its shell cavity. Figure 5 , Figure 6As shown, the side of the push card 5 opposite to the inner side of the shell is provided with one or more convex parts 55, and the convex parts 55 are hemispherical or arc-shaped, so that the convex parts 55 and the shell are in point-surface matching or line-surface matching when in contact, thereby reducing the friction between the push card 5 and the shell, and making the push card 5 rotate more smoothly. Specifically, the two legs 53 of the push card 5 are provided with upper and lower convex parts 55 on the opposite outer sides respectively.

[0039] A relay of the utility model has the following working principle: when the coil is excited, under the action of electromagnetic attraction, one side of the armature 23 is attracted to the pole surface of the lower end of the iron core 25, and at the same time, the other side of the armature 23 swings toward one side of the push card 5, thereby pushing the push card 5 to swing toward the contact closing direction, so that the two push parts 51 on the push card 5 push the wing 311 respectively, thereby pushing the movable spring part 3 to swing, until the movable contact 33 of the movable spring part 3 contacts the static contact 41 of the static spring part 4. After the movable contact 33 contacts the static contact 41, the push part 51 of the push card 5 continues to push the wing 311, causing it to undergo elastic deformation, thereby achieving contact overtravel.

[0040] Therefore, the push card of the utility model can directly push the wing to deform to achieve contact overtravel, and the design of the first through groove 312 and the second through groove 313 makes the wing 311 more flexible and more deformable, which can better achieve contact overtravel. When the movable spring part adopts a multi-piece stacking form, the utility model can also use the deformation of the wing 311 to achieve contact overtravel.

[0041] The utility model provides a relay, and the unrelated parts are the same as those in the prior art or can be implemented by using the prior art.

[0042] The above embodiments are only used to further illustrate a relay of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the technical solution of the present invention.

Claims

1. A relay, comprising a base, and a magnetic circuit part and a contact part mounted on the base, wherein the contact part comprises a movable spring part and a static spring part that cooperate with each other, and an armature of the magnetic circuit part cooperates with the movable spring part through a push card; the movable spring part comprises a first movable spring piece and a movable contact point arranged at one end of the first movable spring piece; characterized in that: One end of the first movable spring piece is provided with elastically deformable wings on both sides in its width direction, and the wings are provided with a first through slot. The push card is provided with a pushing part at a position on the side of the first through slot away from the movable contact corresponding to each wing, for pushing the position.

2. The relay according to claim 1, characterized in that: The first through slot is in the shape of an elongated strip, and one end of the first through slot faces one side of the first movable spring piece in the length direction, and the other end of the first through slot faces the other side of the first movable spring piece in the length direction; one end of the first through slot is closed, and the other end is open.

3. The relay according to claim 1, characterized in that: A second through slot is provided between the wing and the first movable spring piece. The second through slot is in the shape of a long strip with one end closed and the other end open, and one end of the second through slot faces the other side of the first movable spring piece in the length direction, and the other end of the second through slot faces one side of the first movable spring piece in the length direction.

4. The relay according to claim 2 or 3, characterized in that: The other side of the first movable spring piece in the length direction is a side corresponding to the extending direction of one end of the first movable spring piece.

5. The relay according to claim 1, 2 or 3, characterized in that: The movable spring part also includes at least one second movable spring piece, which is superimposed and connected with the first movable spring piece, and one end of the second movable spring piece is relatively fixed to the movable contact; the wing piece protrudes laterally from the second movable spring piece; the second movable spring piece is located on the side of the first movable spring piece facing the push card, and the second movable spring piece is provided with an arc-shaped arch.

6. The relay according to claim 5, characterized in that: The laminated structure formed by the superposition of the first movable spring piece and the second movable spring piece is bent so that the laminated structure is L-shaped, and the other end of the first movable spring piece and the other end of the second movable spring piece are connected to movable spring lead-out pins.

7. The relay according to claim 1, characterized in that: The push card is rotatably connected to the base, and the rotation axis of the push card is located in the width direction of the first movable spring piece.

8. The relay according to claim 7, characterized in that: The magnetic circuit part is vertical and inverted on the base. The push card has two legs distributed along the width direction of the dynamic spring part. The two legs extend downward respectively, and the bottoms of the two legs are rotatably connected to the base respectively.

9. The relay according to claim 8, characterized in that: The bottoms of the two legs are respectively provided with rotating shafts, and the rotating shafts of the two legs extend in the same direction; the base is respectively provided with shaft holes corresponding to the rotating shafts, and the rotating shafts are movably inserted into the corresponding shaft holes.

10. The relay according to claim 1, characterized in that: It also includes a shell with an opening at the bottom end, the bottom end of the shell is connected to the base, and the magnetic circuit part, the contact part, and the push card are contained in its shell cavity; the push card is provided with one or more protrusions on the side opposite to the inner side of the shell, and the protrusion is hemispherical or arc-shaped, so that the protrusion and the shell are in point-to-surface cooperation or line-to-surface cooperation when in contact; the push card is provided with a force block on the side facing the armature to receive the push of the armature; the push part is columnar.

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