Electromagnetic relay
By setting elastically deformable flaps and bending lines in the spring part of the electromagnetic relay, using the push card to push the flaps to achieve contact over-stroke, the problem of insufficient flexibility of the movable reed in the prior art is solved, and the cost and assembly are reduced Complexity improves the durability of the relay.
Patent Information
- Application Number
- CN202323356441.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-08
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2033-12-08
AI Technical Summary
When the existing small electromagnetic relays cooperate with the movable reed, the flexibility of the push card is reduced, making it difficult for contacts to achieve over-stroke, and the introduction of the push reed increases material cost and assembly complexity.
There are elastically deformable flaps on both sides of the width direction of the spring part, and bend lines and notch grooves are provided on one of the spring pieces. The push card realizes contact over-stroke by pushing the flap, avoiding the additional setting of push springs film demand.
The contact over-stroke function is realized, reducing material costs and parts quantity, simplifying the assembly process, and improving the electrical durability of the relay.
Smart Images
Figure CN222233539U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of relays, in particular to an electromagnetic relay. Background Art
[0002] As an electromechanical component, electromagnetic relays have been widely used. Conventional small electromagnetic 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 groove 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, each movable spring piece will be pushed 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 prior arts connect a push spring piece between the push card and the armature of the magnetic circuit part, and use the deformation of the push spring piece to achieve contact overtravel. However, this structure introduces an additional push spring piece, resulting in higher material cost and more troublesome assembly. Utility Model Content
[0003] The utility model aims at the technical problems existing in the prior art and provides an electromagnetic relay which improves the structure of the moving spring part so that the contact overtravel can be achieved without introducing a pushing spring sheet.
[0004] The technical solution adopted by the utility model to solve its technical problems is: an electromagnetic relay, including a base, and a magnetic circuit part and a contact part installed on the base, the contact part includes a movable spring part and a static spring part that cooperate with each other, and the armature of the magnetic circuit part cooperates with the movable spring part through a pushing card; the movable spring part is respectively provided with wings extending outward along its lateral direction and elastically deformable on both sides in its width direction, and the pushing card is respectively provided with a pushing part corresponding to each wing for pushing the wing.
[0005] Furthermore, the movable spring part includes multiple movable spring leaves and movable contacts, the multiple movable spring leaves are superimposed and connected together, and the wing is arranged on one of the movable spring leaves; the movable contact is fixed at one end of the multiple movable spring leaves and is located between the wings on both sides of the movable spring part.
[0006] Furthermore, one of the movable springs is closest to the push card, a bending line is provided between the wing and one of the movable springs, the bending line extends along the length direction of one of the movable springs, and the wing is bent along the bending line toward a side close to the push portion.
[0007] Furthermore, of the two sides of the wing in the length direction of one of the movable spring pieces, one side is flush with an edge of one end of one of the movable spring pieces, and a notch groove is provided between the other side and one of the movable spring pieces.
[0008] Furthermore, among the plurality of movable spring pieces, the movable spring piece closest to the push card is provided with an arc-shaped arch, and the remaining movable spring pieces are flat sheet structures.
[0009] 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 dynamic spring part.
[0010] 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.
[0011] 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.
[0012] Furthermore, it also includes a shell with an opening at the bottom, 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-surface fit or line-surface fit when in contact.
[0013] Furthermore, a force block is provided on a side of the push card facing the armature to receive the push of the armature; and the push portion is columnar.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1. Since the movable spring part is provided with wings extending outward along its lateral direction and elastically deformable on both sides in the width direction, the push card is provided with a push part corresponding to each wing for pushing the wing, so that the push card of the utility model can directly push the wing to deform to achieve contact overtravel. Therefore, the utility model makes it unnecessary to set up additional push springs even if the movable spring part adopts a multi-piece stacking form, thereby reducing material costs, reducing overall parts, and making assembly easier.
[0016] 2. 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.
[0017] 3. 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.
[0018] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the electromagnetic relay of the utility model is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model (excluding the housing);
[0020] Figure 2 It is a cross-sectional view of the utility model (excluding the housing);
[0021] Figure 3 This is a three-dimensional structure diagram of the dynamic spring part of the utility model. Figure 1 ;
[0022] Figure 4 This is a three-dimensional structure diagram of the dynamic spring part of the utility model. Figure 2 ;
[0023] Figure 5 It is a three-dimensional structural schematic diagram of the push card of the utility model;
[0024] Figure 6 It is a three-dimensional structural schematic diagram of the base of the utility model;
[0025] 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, one of the moving springs, 311, wing, 312, bending first, 313, notch groove, 314, arc arch, 32, another 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
[0026] In the description of the present invention, unless otherwise specified, "plurality" means two or more. In the description of the present invention, 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, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] See also Figure 1-Figure 6 As shown, an electromagnetic relay of the utility model includes a base 1, and a magnetic circuit part 2 and a contact part installed on the base 1, the contact part includes a movable spring part 3 and a static spring part 4 that cooperate with each other, and the armature 23 of the magnetic circuit part 2 cooperates with the movable spring part 3 through a pushing card 5. The movable spring part 3 is provided with single-piece wings 311 extending outward along its lateral direction and elastically deformable on both sides in the width direction, and the pushing card 5 is provided with a pushing part 51 corresponding to each wing 311, which is used to push the wing 311, thereby pushing the movable spring part 3 to move. The push card 5 is provided with a force block 52 on the side facing the armature 23, which is used to receive the push of the armature 23. The pushing parts 51 of the pushing card 5 are respectively columnar, but are not limited to this. The width direction of the movable spring part 3 corresponds to Figure 3 The direction of the X-axis of the three-dimensional coordinate system corresponds to the thickness direction of the movable spring part 3 Figure 3 The direction of the Y axis of the three-dimensional coordinate system corresponds to the length direction of the dynamic spring part 3 Figure 3 The direction of the Z axis of the three-dimensional coordinate system.
[0028] Further, the movable spring part 3 includes a plurality of movable springs and a movable contact 33, and the plurality of movable springs are superimposed and connected together. 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. The wing 311 is arranged on one of the movable springs 31, that is, the wing 311 is integrally formed with one of the movable springs 31, and the wing 311 will not contact with other movable springs when pushed by the pushing part 51. The movable contact 33 is fixed at one end of the plurality of movable springs and is located between the wing 311 on both sides of the movable spring part 3. The other end of the plurality of movable springs is connected with a movable spring lead-out pin 34. Specifically, the number of movable springs is two, and among the two movable springs, one of the movable springs 31 is closest to the push card 5 and is provided with an arc-shaped arch 314, and the other movable spring 32 is a flat sheet structure. In other embodiments, the movable spring part includes a movable spring and a movable contact arranged at one end of the movable spring, and the wing is arranged on the movable spring.
[0029] In this embodiment, one of the two sides of the wing 311 in the length direction of one of the movable springs 31 is flush with one end edge of one of the movable springs 31, and a notch groove 313 is provided between the other side and one of the movable springs 31, which is conducive to improving the flexibility of the wing 311. A bending line 312 is provided between the wing 311 and one of the movable springs 31, and the bending line 312 extends along the length direction of one of the movable springs 31, and the wing 311 is bent along the bending line 312 to the side close to the push portion 51. In this way, it can be avoided that when one end of the other movable spring 32 is larger in width, it interferes with the wing 311 and affects the elastic deformation of the wing 311. In other embodiments, the wing is provided on the movable spring farthest from the push card, that is, on the other movable spring.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] 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 5As 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.
[0034] The electromagnetic 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 corresponding 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.
[0035] Therefore, the utility model eliminates the need for an additional push spring in the movable spring part 3, thereby reducing material costs, reducing overall parts count, and making assembly easier. In addition, the wing 311 of the utility model has a small deformation, which can better transmit mechanical energy to the contact, effectively improving the electrical durability of the relay.
[0036] The utility model provides an electromagnetic relay, and the unrelated parts are the same as those in the prior art or can be implemented by using the prior art.
[0037] The above embodiments are only used to further illustrate an electromagnetic relay of the utility model, but the utility model 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 utility model fall within the protection scope of the technical solution of the utility model.
Claims
1. An electromagnetic 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; characterized in that: The movable spring part is provided with wings extending outwardly along its lateral direction and elastically deformable on both sides in its width direction, and the push card is provided with a pushing part corresponding to each wing for pushing the wing.
2. The electromagnetic relay according to claim 1, characterized in that: The movable spring part includes a plurality of movable spring pieces and a movable contact point. The plurality of movable spring pieces are superimposed and connected together, and the wing piece is arranged on one of the movable spring pieces. The movable contact point is fixed at one end of the plurality of movable spring pieces and is located between the wings on both sides of the movable spring part.
3. The electromagnetic relay according to claim 2, characterized in that: One of the movable springs is closest to the push card, a bending line is provided between the wing and one of the movable springs, the bending line extends along the length direction of one of the movable springs, and the wing is bent along the bending line toward a side close to the push portion.
4. The electromagnetic relay according to claim 2, characterized in that: Of the two sides of the wing piece in the length direction of one of the movable spring pieces, one side is flush with an edge of one end of the one of the movable spring pieces, and a notch groove is provided between the other side and the one of the movable spring pieces.
5. The electromagnetic relay according to claim 2, characterized in that: Among the plurality of movable springs, the movable spring closest to the push card is provided with an arc-shaped arch, and the remaining movable springs are flat structures.
6. The electromagnetic 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 dynamic spring part.
7. The electromagnetic relay according to claim 6, 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.
8. The electromagnetic relay according to claim 7, 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.
9. The electromagnetic 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 protrusions are hemispherical or arc-shaped, so that the protrusions are in point-surface cooperation or line-surface cooperation when in contact with the shell.
10. The electromagnetic relay according to claim 1, characterized in that: A force block is provided on one side of the push card facing the armature for receiving the push of the armature; and the push portion is columnar.