Movable spring part and pushing card connecting structure and electromagnetic relay

Abstract

The utility model discloses a movable spring part and push card connection structure and an electromagnetic relay, the movable spring part and push card connection structure comprises a movable spring part and a push card, the movable spring part comprises a movable spring sheet, a movable spring leading-out sheet and a movable contact, the upper end of the movable spring sheet is fixedly connected with the upper end of the movable spring leading-out sheet, and the movable contact is arranged on the movable spring sheet and is opposite to the movable spring leading-out sheet; the pushing clamp is provided with a clamping groove and a receding through groove, the lower end of the movable reed is clamped in the clamping groove, the movable reed leading-out piece is arranged in the receding through groove in a penetrating mode, and a supporting limiting structure is arranged between the movable reed leading-out piece and the pushing clamp in a matched mode so as to limit the pushing clamp to be separated from the movable reed leading-out piece. The movable spring part and the pushing clamp can be assembled into an assembly and are arranged in the base from top to bottom, the assembly is simple and efficient, the base bottom plate does not need to be opened, cover plate parts do not need to be added, the part cost and the glue leakage risk can be reduced, the base structure is more regular, injection molding is easier, deformation is not prone to occurring, and the size stability is better. And stability of performance parameters of the relay can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a connecting structure between a moving contact part and a pushing card and an electromagnetic relay. Background Art

[0002] An electromagnetic relay is an electronic control device, which is usually applied to an automatic control circuit. It is actually an "automatic switch" that uses a smaller current to control a larger current, so it plays roles such as automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] In applications such as power systems, short-circuit faults are not completely avoidable. If the relay does not have the ability to withstand short-circuit current, once a short circuit occurs, the fault range of the entire circuit will be expanded, affecting the stability and reliability of the system. Good short-circuit current resistance helps to ensure the stable operation of the relay in a complex electromagnetic environment without being interfered. At present, the anti-short-circuit structure of the contact part of the relay is designed such that one end of the moving contact piece is connected to one end of the moving contact lead-out piece, and the other ends of the moving contact piece and the moving contact lead-out piece are in the same direction, that is, the moving contact piece and the moving contact lead-out piece are arranged side by side. When one end of the moving contact lead-out piece penetrates the base from top to bottom partially, the exposed part is used as a terminal for connecting to the external circuit. At this time, the free end of the moving contact piece is at the bottom position of the base. The pushing card, as a linkage part, is usually also placed at the bottom position of the base, which is more conducive to the movement of the moving contact piece. When the base is a frame-type structure, in order to facilitate the assembly of the pushing card, the prior art usually opens the bottom plate of the base, and the pushing card is assembled from the opening at the bottom of the base. After the pushing card is assembled, the opening is sealed by a cover plate part. The problems of this solution are that the shape of the base is irregular, it is difficult to injection mold, the parts are warped and deformed greatly, which will affect the assembly of the remaining parts, and at the same time will also affect the mechanical parameters and electrical parameters of the relay, and further affect the performance parameters of the relay; in addition, the cooperation between the cover plate and the base is poor, and the glue is very easy to flow into the relay interior, gluing the pushing card and the base, resulting in the relay not operating.

[0004] The prior art also adopts a structure with a side-insertion method for the moving contact part. In this structure, the base has no front side plate. This structure requires pre-assembly of the moving contact part, the pushing card, the magnetic circuit part, and the armature in combination and linkage, and then they are all installed into the base together. This assembly method has a high positioning accuracy for each part; at the same time, a cover plate part is required to seal the moving contact feet and static contact feet slots of the base to prevent glue leakage. Generally speaking, the disadvantages of this structure are complex assembly, high assembly cost, and more parts are required, and the part cost is also relatively high. Summary of the Utility Model

[0005] In view of the technical problems existing in the prior art, the utility model provides a connecting structure between a moving contact part and a pushing card and an electromagnetic relay, so that the moving contact part and the pushing card are assembled into a component and then installed into the base together.

[0006] The technical solution adopted by the present utility model to solve its technical problems is as follows: A connection structure between a moving spring part and a pushing card, which includes a moving spring part and a pushing card. The moving spring part includes a moving spring piece, a moving spring lead-out piece, and a moving contact. The upper end of the moving spring piece is fixedly connected to the upper end of the moving spring lead-out piece, and the moving contact is arranged on the moving spring piece and faces away from the moving spring lead-out piece. The pushing card is provided with a card slot and a relief through slot. The lower end of the moving spring piece is clamped in the card slot, the moving spring lead-out piece penetrates through the relief through slot, and a support and limit structure is cooperated between the moving spring lead-out piece and the pushing card to limit the pushing card from separating from the moving spring lead-out piece.

[0007] Further, the support and limit structure includes a support platform arranged on the moving spring lead-out piece and a convex block arranged on the groove wall of the relief through slot, and the convex block is placed on the support platform.

[0008] Further, the convex block is located on the side of the relief through slot away from the card slot. Before the moving spring part is connected to the pushing card, the horizontal distance between the relative outer sides of the lower ends of the moving spring piece and the moving spring lead-out piece is greater than the horizontal distance between the side of the card slot away from the relief through slot and the convex block. The lower end of the moving spring piece is clamped into the card slot under the state that the moving spring piece deforms towards the side of the moving spring lead-out piece, and the moving spring piece drives the pushing card to move by elastically restoring towards the side away from the moving spring lead-out piece, so that the convex block moves above the support platform.

[0009] Further, the number of the support platforms is two, the two support platforms are located on both sides of the moving spring lead-out piece in the width direction, the number of the convex blocks is two, and the two convex blocks are cooperated with the two support platforms one by one.

[0010] Further, notches are respectively arranged on both sides of the moving spring lead-out piece in the width direction, the lower wall surface of the notch forms the support platform, and the upper wall surface of the notch is located above the pushing card.

[0011] Further, a limit groove is arranged on the groove wall of the side of the card slot away from the relief through slot, and a limit convex part corresponding to the limit groove is arranged at the lower end of the moving spring piece, and the limit convex part is clamped into the limit groove.

[0012] Further, the moving spring piece includes a plurality of sub-spring pieces, the plurality of sub-spring pieces are stacked together, and at least a part of the lower end of the sub-spring piece farthest from the moving spring lead-out piece is bent upwards from the side away from the moving spring lead-out piece to form a hook, and the hook forms the limit convex part. The card slot penetrates up and down, and the limit groove is a blind groove structure with an opening at the lower end.

[0013] Further, the relief through slot is a relief through slot structure with a closed perimeter, and the lower end of the moving spring lead-out piece passes downwards through the relief through slot. The pushing card is further provided with a connection slot for connecting the armature part of the relay, and the relief through slot is located between the card slot and the connection slot.

[0014] The utility model further provides an electromagnetic relay, including a base, and also including the movable spring part and the push card connecting structure of the utility model as described above, the connecting structure is installed into the base from top to bottom, and the lower end of the movable spring lead-out piece is inserted into the corresponding slot of the base.

[0015] Furthermore, the edge of the base is provided with two surrounding walls arranged opposite to each other; it also includes an armature part, which includes a driving body and an armature assembly arranged on the driving body, the armature assembly is in an I-shape, and its four ends respectively extend out of the driving body, the driving body is rotatably connected to the surrounding walls by a rotating shaft, and the bottom end of the driving body is connected to a push card.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Since the push card of the utility model is provided with a card slot and a clearance slot, the lower end of the movable spring sheet is clamped in the card slot, the movable spring lead-out sheet is inserted in the clearance slot, and a support and limiting structure is provided between the movable spring lead-out sheet and the push card to limit the push card from being separated from the movable spring lead-out sheet, so that the movable spring part and the push card of the utility model can be assembled into a component, and the push card will not fall off after assembly. After the movable spring part and the push card are assembled into a component, they can be loaded into the base from top to bottom together, which is simple and efficient to assemble, and the bottom plate of the base does not need to be opened, and there is no need to add cover plate parts, which can reduce the cost of parts and the risk of glue leakage. At the same time, since the bottom plate of the base has no opening, the base structure is more regular, easier to injection mold and not easy to deform, and the dimensional stability is better, which can better ensure the stability of the performance parameters of the relay.

[0018] 2. As a preferred embodiment, the support and limiting structure includes a support platform provided on the movable spring lead-out piece and a protrusion provided on the groove wall of the clearance groove. The protrusion is placed on the support platform, so that the support and limiting structure is relatively simple. In addition, the utility model does not require the introduction of additional parts, which helps to reduce costs and simplify the assembly process.

[0019] 3. The lower end of the movable spring piece is inserted into the card slot when the movable spring piece is deformed toward the side of the movable spring lead-out piece, and the movable spring piece drives the push card to move by elastically recovering toward the side away from the movable spring lead-out piece, so that the protrusion moves above the support platform. Therefore, the utility model realizes a special matching mode between the movable spring piece and the push card, ensuring that the lower end of the movable spring lead-out piece can freely pass through the clearance slot of the push card, and at the same time, the elastic effect of the movable spring piece itself is used to realize that the movable spring lead-out piece provides stable support for the push card, so that the structure of the push card and the movable spring part is more stable after being assembled into an assembly.

[0020] 4. The lower end of the movable spring piece is bent to form a hook, and cooperates with the limiting groove on the corresponding side of the card slot, so that the matching structure of the movable spring piece and the push card is relatively simple, and the limiting matching effect is better.

[0021] 5. The moving spring part and the pushing card of the present utility model are pre-assembled into a component, which not only facilitates automated production but also forms an integral whole, thus facilitating transfer.

[0022] The following further elaborates on the present utility model in conjunction with the attached drawings and embodiments; however, a connection structure between the moving spring part and the pushing card of the present utility model and an electromagnetic relay are not limited to the embodiments. Description of the Drawings

[0023] Figure 1 is a schematic three-dimensional structure diagram of the moving spring part of the present utility model;

[0024] Figure 2 is a right view of the moving spring part of the present utility model;

[0025] Figure 3 is a schematic three-dimensional structure illustration of the pushing card of the present utility model Figure 1 ;

[0026] Figure 4 is a top view of the pushing card of the present utility model;

[0027] Figure 5 is a schematic three-dimensional structure illustration of the pushing card of the present utility model Figure 2 ;

[0028] Figure 6 is a cross-sectional view of the pushing card of the present utility model;

[0029] Figure 7 is an assembly schematic of the moving spring part and the pushing card of the present utility model Figure 1 ;

[0030] Figure 8 is Figure 7 the corresponding cross-sectional view;

[0031] Figure 9 is an assembly schematic of the moving spring part and the pushing card of the present utility model Figure 2 ;

[0032] Figure 10 is Figure 9 the corresponding cross-sectional view;

[0033] Figure 11 is an assembly schematic of the moving spring part and the pushing card of the present utility model Figure 3 ;

[0034] Figure 12 is Figure 11 the corresponding cross-sectional view;

[0035] Figure 13 is a schematic three-dimensional structure diagram of the connection structure between the moving spring part and the pushing card of the present utility model;

[0036] Figure 14 is a cross-sectional view of the moving spring part and the pushing card connection structure of the present utility model;

[0037] Figure 15 is a three-dimensional structure diagram of the electromagnetic relay of the present utility model (excluding the outer shell);

[0038] Figure 16 is a cross-sectional view of the electromagnetic relay of the present utility model (excluding the outer shell);

[0039] In the figure, 1 is the moving spring part, 11 is the moving spring lead piece, 111 is the support platform, 112 is the notch, 12 is the moving spring piece, 121 is the sub-spring piece, 122 is the U-shaped bend, 123 is the hook, 13 is the moving contact, 2 is the pushing card, 21 is the card slot, 211 is the limit slot, 22 is the relief through slot, 221 is the convex block, 23 is the connection slot, 3 is the base, 31 is the surrounding wall, 4 is the armature part, 41 is the driving body, 42 is the armature, 43 is the permanent magnet, 5 is the rotating shaft, 6 is the winding unit, 61 is the coil bobbin, 62 is the enameled wire, 63 is the iron core, 64 is the yoke, 7 is the static spring part, 71 is the static spring piece, 72 is the static contact. Specific embodiments

[0040] In the present utility model, in the description, the orientation or positional relationship indicated by "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In addition, in the description of the present utility model, unless otherwise specified, "a plurality of" means two or more. In the description of the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection, can be a mechanical connection, can be an electrical connection, can be directly connected, or can be indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] Please refer to Figures 1 - 14As shown in the figure, a connection structure between a moving spring part and a pushing card of the present utility model includes a moving spring part 1 and a pushing card 2. The moving spring part 1 includes a moving spring piece 12, a moving spring lead-out piece 11, and a moving contact 13. The upper end of the moving spring piece 12 is fixedly connected to the upper end of the moving spring lead-out piece 11 by riveting. The moving contact 13 is arranged on the moving spring piece 12 and faces away from the moving spring lead-out piece 11. Specifically, the moving contact 13 is roughly riveted at the middle position of the moving spring piece 12. The moving spring piece 12 includes a plurality of sub-spring pieces 121, and these plurality of sub-spring pieces 121 are stacked together, and at the upper ends of each of the sub-spring pieces 121, there are respectively provided U-shaped bends 122 protruding toward the side away from the moving spring lead-out piece 11, as Figure 1 , Figure 2 shown.

[0043] As Figures 3 - 6 shown, the pushing card 2 is provided with a card slot 21, a relief through slot 22, and a connection slot 23 for connecting the armature part of the relay in sequence from left to right. The relief through slot 22 is located between the card slot 21 and the connection slot 23. The card slot 21, the relief through slot 22, and the connection slot 23 are respectively through slot structures that are vertically through and closed around. The lower end of the above-mentioned moving spring piece 12 is clamped in the card slot 21, so that the moving spring piece 12 forms a limit on the pushing card 2; the moving spring lead-out piece 11 penetrates through the relief through slot 22 of the pushing card 2, that is, the lower end of the moving spring lead-out piece 11 passes through the relief through slot 22 from top to bottom, and a support and limit structure is provided between the moving spring lead-out piece 11 and the pushing card 2 to limit the pushing card 2 from separating from the moving spring lead-out piece 11. Therefore, after the moving spring part 1 and the pushing card 2 are assembled, a stable component is formed.

[0044] In this embodiment, the support and limit structure includes a support platform 111 provided on the moving spring lead-out piece 11 and a convex block 221 provided on the groove wall of the relief through slot 22. The convex block 221 is placed on the support platform 111. In this way, the support and limit structure is relatively simple, and the present utility model does not need to introduce additional parts, which helps to reduce costs and simplify the assembly process. In other embodiments, the support and limit structure is a limiting member sleeved on the moving spring lead-out piece and located below the pushing card to support the pushing card by using this limiting member.

[0045] The number of the above-mentioned support platforms 111 is two, and the two support platforms 111 are located on both sides of the moving spring lead-out piece 11 in the width direction. The number of the convex blocks 221 is also two, and the two convex blocks 221 are respectively located on the side of the relief through slot 22 away from the card slot 21. The two convex blocks 221 are in one-to-one cooperation with the two support platforms 111. Specifically, on both sides of the moving spring lead-out piece 11 in the width direction, there are respectively provided notches 112. The lower wall surfaces of the two notches 112 respectively constitute the two support platforms 111, and the upper wall surfaces of the two notches 112 are respectively located above the pushing card 2. The notches 112 are preferably square notches, which can accommodate the pushing card 2, and the pushing card 2 can move in the notches 112.

[0046] In this embodiment, after the movable spring piece 12 is connected to the movable spring lead-out piece 11, the movable spring piece 12 is inclined toward the side away from the movable spring lead-out piece 11, and before the movable spring part 1 is connected to the push card 2, the horizontal distance A between the lower end of the movable spring piece 12 and the relative outer side of the lower end of the movable spring lead-out piece 11 is greater than the horizontal distance B between the side of the card slot 21 away from the clearance slot 22 and the protrusion 221. The lower end of the movable spring piece 12 is inserted into the card slot 21 when the movable spring piece 12 is deformed toward the side of the movable spring lead-out piece 11, and the movable spring piece 12 elastically recovers toward the side away from the movable spring lead-out piece 11 to drive the push card 2 to move, so that the protrusion 221 moves to the top of the support platform 111, thereby realizing the support of the support platform 111 on the protrusion 221. Therefore, the utility model realizes a special matching mode between the movable spring piece 12 and the push card 2, ensuring that the lower end of the movable spring lead-out piece 11 can freely pass through the clearance groove 22 of the push card 2, and at the same time utilizes the elastic effect of the movable spring piece 12 itself to realize that the movable spring lead-out piece 11 provides stable support for the push card 2, so that the structure of the push card 2 and the movable spring part 1 is more stable after being assembled into an assembly.

[0047] In this embodiment, a limiting groove 211 is provided on the groove wall of the clamping groove 21 away from the clearance groove 22, and a limiting convex portion is provided at the lower end of the movable spring piece 12 corresponding to the limiting groove 211, and the limiting convex portion is inserted into the limiting groove 211. Specifically, among the multiple sub-springs of the movable spring piece 12, the lower end of the sub-spring piece farthest from the movable spring lead-out piece is at least partially bent upward from the side away from the movable spring lead-out piece 11 to form a hook 123, and the hook 123 constitutes the limiting convex portion. The limiting groove 211 is a blind groove structure with an opening at the lower end, so that the hook 123 can better enter the limiting groove 211. In other embodiments, the lower end of the movable spring piece is interference fit with the clamping groove.

[0048] The utility model is a structure for connecting a movable spring part and a push card, wherein the assembly sequence of the movable spring part 1 and the push card 2 is as follows: first, align the lower end of the movable spring lead-out piece 11 with the wider part of the make way slot 22 of the push card 2, and insert the movable spring lead-out piece 11 downward into the make way slot 22 of the push card 2, such as Figure 7 , Figure 8 As shown, at this time, the lower end of the movable spring piece 12 is located above the push card 2; then, the movable spring piece 12 is pushed to one side of the movable spring lead-out piece 11 by a certain distance, so that the lower end of the movable spring piece 12 is aligned with the card slot 21 of the push card 2, as shown in FIG. Figure 9 , Figure 10 As shown in the figure, the arrow indicates the movement direction of the dynamic spring piece 12; then, keep pressing the dynamic spring piece 12, and move the entire dynamic spring part 1 downward, or move the push card 2 upward, so that the lower end of the dynamic spring piece 12 is inserted into the card slot 21 of the push card 2, and the two support platforms 111 on the dynamic spring lead-out piece 11 are respectively located below the push card 2, such as Figure 11 , Figure 12As shown in the figure; finally, release the moving reed 12, then the moving reed 12 elastically restores to the side away from the moving reed lead piece 11, drives the pushing card 2 to move in the same direction, and at the same time, the hook 123 at the lower end of the moving reed 12 is caught in the limiting groove 211 on one side of the card slot 21, and the two bumps 221 in the relief through groove 22 of the pushing card 2 respectively move above the two support platforms 111 of the moving reed lead piece 11, thereby realizing the support for the pushing block. At the same time, the hook 123 of the moving reed 12 and the limiting groove 211 of the pushing card 2 are in limiting cooperation, which can ensure that the pushing card 2 will not break away from the moving reed part 1.

[0049] Therefore, through the special cooperation between the moving reed 12 and the pushing card 2 of the present utility model, it can be realized that the pushing card 2 will not come out after assembly. After the moving reed part 1 and the pushing card 2 are assembled into a component, they can be loaded into the base from top to bottom together. The assembly is simple and efficient; at the same time, the base can adopt a high surrounding frame structure, and the bottom plate of the base does not need to be opened, without adding a cover plate part, which can reduce the part cost and the risk of glue leakage. Moreover, the base part has small deformation, stable size and structure, and can better ensure the stability of product performance parameters.

[0050] Please refer to Figures 1 - 16 As shown in the figure, an electromagnetic relay of the present utility model includes a base 3, and also includes the connection structure between the moving reed part and the pushing card of the present utility model as described above. This connection structure is loaded into the base 3 from top to bottom, and the lower end of the moving reed lead piece 11 is inserted into the corresponding slot of the base 3.

[0051] In this embodiment, two opposite side walls 31 are provided at the edge of the base 3. The present utility model further includes an armature part 4, which includes an insulating driving body 41 and an armature assembly arranged on the driving body 41. The armature assembly is in an I shape, and its four ends respectively extend out of the driving body 41. The driving body 41 is rotatably connected to the two side walls 31 of the base 3 by a rotating shaft 5, and the bottom end of the driving body 41 is connected to the pushing card 2. The armature assembly is specifically composed of two parallel armatures 42 and a permanent magnet 43 clamped between the two armatures 41. The present utility model further includes a winding unit 6, which includes a coil bobbin 61, an enameled wire 62 wound around the coil bobbin 61, two yokes 64 and an iron core 63. The iron core 63 passes through the through hole of the coil bobbin. The two yokes 64 are respectively in an L shape, and one side of each of the two yokes 64 is riveted and fixed to the two ends of the iron core 63 respectively. The other side of one of the yokes 64 is fitted between the upper ends of the two armatures 42, and the other side of the other yoke 64 is fitted between the lower ends of the two armatures 42, as Figure 16 shown in the figure. Therefore, the present utility model constitutes a magnetic latching relay, but is not limited thereto.

[0052] The utility model further comprises a static spring part 7, which comprises a static spring piece 71 inserted into the base 3 and a static contact 72 arranged on the static spring piece 71, and the static contact 72 cooperates with the dynamic contact 13 on the dynamic spring part 1. In the utility model, when the contact is closed, the static spring part 7 pushes the dynamic spring piece 12, so that the dynamic spring piece 12 is deformed toward one side of the dynamic spring lead-out piece 11. Therefore, the size of the above-mentioned protrusion 221 is designed to be small, so that after the dynamic spring part 1 is assembled with the push card 2, the dynamic spring lead-out piece 11 basically contacts the side groove wall of the clearance groove 22 provided with the protrusion 221. In other embodiments, by increasing the size of the protrusion 221 in the moving direction of the push card 2, after the dynamic spring part 1 is assembled with the push card 2, there is a suitable spacing between the dynamic spring lead-out piece 11 and the side groove wall of the clearance groove 22 provided with the protrusion 221, so as to reserve a margin for the push card 2 to drive the dynamic spring piece 12 to move away from the dynamic spring lead-out piece 11.

[0053] The utility model also includes a shell (not shown in the figure), the bottom end of which is connected to the base 3, and contains the static spring part 7, the dynamic spring part 1, the push card 2, the armature part 4, the winding unit 6, etc. in its shell cavity.

[0054] The utility model provides a movable spring part and a push card connection structure and an electromagnetic relay, and the uninvolved parts are the same as the prior art or can be implemented by using the prior art.

[0055] The above embodiments are only used to further illustrate a movable spring part and push card connection structure and 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. A connecting structure between a moving spring part and a pushing card, comprising a moving spring part and a pushing card. The moving spring part includes a moving spring piece, a moving spring lead-out piece, and a moving contact. The upper end of the moving spring piece is fixedly connected to the upper end of the moving spring lead-out piece. The moving contact is arranged on the moving spring piece and faces away from the moving spring lead-out piece; it is characterized in that: The push card is provided with a card slot and a clearance slot extending vertically therethrough. The lower end of the movable spring sheet is clamped in the card slot, the movable spring lead-out sheet is inserted in the clearance slot, and a supporting and limiting structure is provided between the movable spring lead-out sheet and the push card to limit the push card from separating from the movable spring lead-out sheet.

2. The connecting structure between the moving spring part and the pushing card according to claim 1, characterized in that: The support and limiting structure comprises a support platform arranged on the movable spring lead-out piece and a convex block arranged on the groove wall of the displacement through groove, and the convex block rests on the support platform.

3. The moving spring part and the pushing card connection structure according to claim 2, characterized in that: The protrusion is located on the side of the displacement slot away from the card slot, and before the movable spring part is connected to the push card, the horizontal distance between the lower end of the movable spring piece and the relatively outer side of the lower end of the movable spring lead-out piece is greater than the horizontal distance between the side of the card slot away from the displacement slot and the protrusion; the lower end of the movable spring piece is inserted into the card slot when the movable spring piece is deformed toward the side of the movable spring lead-out piece, and the movable spring piece drives the push card to move by elastically recovering to the side away from the movable spring lead-out piece, so that the protrusion moves above the support platform.

4. The connection structure between the moving spring part and the pushing card according to claim 2, characterized in that: There are two support platforms, which are located on both sides of the movable spring lead-out piece in the width direction. There are two protrusions, which match the two support platforms one by one.

5. The moving spring part and the pushing card connection structure according to any one of claims 2-4, characterized in that: The movable spring lead-out piece is provided with notches on both sides in the width direction, the lower wall surface of the notch constitutes the support platform, and the upper wall surface of the notch is located above the push card.

6. The moving spring part and the pushing card connection structure according to any one of claims 1-4, characterized in that: A limiting groove is provided on a groove wall on one side of the clamping groove away from the displacement through groove, and a limiting convex portion is provided at the lower end of the movable spring sheet corresponding to the limiting groove, and the limiting convex portion is clamped into the limiting groove.

7. The moving spring part and the pushing card connection structure according to claim 6, characterized in that: The movable spring sheet includes a plurality of sub-spring sheets, which are stacked together. The lower end of the sub-spring sheet farthest from the movable spring lead-out sheet is at least partially bent upward from a side farthest from the movable spring lead-out sheet to form a hook, and the hook constitutes the limiting protrusion; the clamping groove is through-through from top to bottom, and the limiting groove is a blind groove structure with an opening at the lower end.

8. The moving spring part and the pushing card connection structure according to any one of claims 1-4, characterized in that: The clearance slot is a clearance slot structure that is closed on all sides, and the lower end of the movable spring lead-out piece passes downward through the clearance slot; the push card is also provided with a connecting slot for connecting the armature part of the relay, and the clearance slot is located between the card slot and the connecting slot.

9. An electromagnetic relay, comprising a base, characterized in that: It also includes a movable spring portion and a push card connection structure as described in any one of claims 1 to 7, the connection structure is installed into the base from top to bottom, and the lower end of the movable spring lead-out piece is inserted into a corresponding slot of the base.

10. The electromagnetic relay according to claim 9, characterized in that: The edge of the base is provided with two surrounding walls arranged opposite to each other; it also includes an armature part, which includes a driving body and an armature assembly arranged on the driving body. The armature assembly is in an I-shape, and its four ends extend out of the driving body respectively. The driving body is rotatably connected to the two surrounding walls by a rotating shaft, and the bottom end of the driving body is connected to the pushing card.

Images