An electromagnetic relay and an assembling method of a moving spring assembly thereof

Abstract

The application discloses an electromagnetic relay and an assembling method of a moving spring assembly thereof. The electromagnetic relay comprises a base, a moving spring part and a pushing card. The moving spring part comprises an elastically deformable moving spring sheet, a moving spring lead-out sheet and a moving contact. The upper end of the moving spring sheet is fixedly connected with the upper end of the moving spring lead-out sheet, and the moving contact is arranged on the moving spring sheet. The lower end of the moving spring sheet is clamped in a clamping groove arranged on the pushing card, and the lower end of the moving spring lead-out sheet passes through a gap through groove arranged on the pushing card, so that the moving spring part and the pushing card form the moving spring assembly. The moving spring assembly is assembled into the base from top to bottom, and the lower end of the moving spring lead-out foot is inserted into a moving spring insertion groove arranged on the base. The pushing card can be assembled into the base with a high frame structure from top to bottom, so that a cover plate part is not needed, the risk of glue leakage is reduced, and the stability of product performance parameters is ensured.

Description

Technical Field

[0001] This invention relates to the field of relay technology, and in particular to an assembly method for an electromagnetic relay and its moving spring assembly. Background Technology

[0002] An electromagnetic relay is an electronic control device that is commonly used in automatic control circuits. It is essentially an "automatic switch" that uses a smaller current to control a larger current, thus playing roles such as automatic adjustment, safety protection, and circuit switching in circuits.

[0003] With the diversification of power system applications, relays are required to have high short-circuit current withstand capability, high load capacity, and miniaturization. Short-circuit faults are unavoidable in power system applications. If a relay does not have the ability to withstand short-circuit current, a short circuit will lead to an expansion of the fault range of the entire circuit, affecting the stability and reliability of the system. Currently, the short-circuit withstand structure of the relay contact part is designed with one end of the moving spring and the moving spring lead connected, and the other ends of the moving spring and the moving spring lead facing the same direction, that is, the moving spring and the moving spring lead are arranged side by side. When one end of the moving spring lead penetrates the base from top to bottom, the exposed part serves as a terminal for connecting to the external circuit. At this time, the free end of the moving spring is located at the bottom of the base. The push clip, as a linkage component, is also usually located at the bottom of the base, which is more conducive to the operation of the moving spring. Because relays control large loads, the exposed terminals of the relays are relatively wide to reduce temperature rise. To facilitate the installation of the push card, existing technology usually has an opening in the base plate. The push card is inserted into the base through the opening in the base plate. After the push card is assembled, the opening is sealed by a cover plate. The problems with this solution are that the base shape is irregular, making injection molding difficult and causing large warping and deformation of the parts. This can lead to the cover plate not fitting tightly with the base. The poor dimensional accuracy of the groove formed by the base and cover plate can cause the push block to move unevenly. At the same time, due to the poor fit between the cover plate and the base, glue can easily flow into the relay, sticking the push card to the base and causing the relay to malfunction.

[0004] Existing technologies also employ a side-insertion structure with a moving spring. This structure involves a base without a front side plate. In this design, the moving spring, push card, magnetic circuit, and armature are pre-assembled together before being inserted into the base. The rear side plate of the base has a groove to accommodate the push card. Because there is no front side plate, a cover plate is required. The groove formed by the cover plate and the base accommodates the push card. Due to the poor fit of the cover plate, the grooves on the front and rear sides of the base that accommodate the push card are difficult to align in height, which can affect the movement of the push card. Summary of the Invention

[0005] This invention addresses the technical problems existing in the prior art by providing an assembly method for an electromagnetic relay and its moving spring assembly. Through structural improvements, the push card can be installed from top to bottom into a base with a frame structure along with the moving spring, thus eliminating the need to provide an opening on the bottom plate of the base.

[0006] The technical solution adopted by the present invention to solve its technical problem is: an electromagnetic relay, including a base, a moving spring part and a pusher clip. The moving spring part includes a moving spring sheet that can elastically deform, a moving spring lead-out sheet and a moving contact. The upper end of the moving spring sheet is fixedly connected to the upper end of the moving spring lead-out sheet, and the moving contact is disposed on the moving spring sheet. The lower end of the moving spring sheet is engaged in a slot provided by the pusher clip, and the lower end of the moving spring lead-out sheet passes through a clearance slot provided by the pusher clip, so that the moving spring part and the pusher clip form a moving spring assembly. The moving spring assembly is installed into the base from top to bottom, and the lower end of the moving spring lead-out sheet is inserted into a moving spring slot provided by the base.

[0007] Furthermore, when the moving spring assembly is installed, the pusher is in a misaligned state that deforms the moving spring sheet toward the side of the moving spring lead sheet. When the moving spring assembly is installed downwards into place, the moving spring sheet, along with the pusher, elastically returns to its original position away from the moving spring lead sheet.

[0008] Furthermore, the base includes a base plate and two surrounding walls disposed on the edge of the base plate and arranged opposite to each other in the width direction of the moving spring lead-out piece. The inner surfaces of the two surrounding walls are respectively provided with first grooves extending vertically. The upper and lower ends of the first grooves are provided with openings. The push card is provided with protrusions on both sides in the width direction of the moving spring lead-out piece. When the push card is in the misaligned state, the protrusions on both sides of the push card enter the first grooves of the two surrounding walls respectively and move downward along the first grooves.

[0009] Furthermore, the bottom of the inner side of the two walls is provided with a second groove extending along the thickness direction of the spring lead-out piece, and the lower end of the first groove is connected to the second groove; when the spring assembly is installed downwards, the protrusion enters the second groove from the first groove.

[0010] Furthermore, the base and / or the moving spring portion are provided with guide limiting members to limit and guide the push card.

[0011] Furthermore, the base includes a base plate and two surrounding walls disposed on the edge of the base plate and arranged opposite to each other in the width direction of the spring lead-out plate. At least one of the two surrounding walls is equipped with the guide limiting member, and the bottom of the surrounding wall on which the guide limiting member is installed is provided with a mounting groove penetrating its inner and outer sides. The guide limiting member is inserted into the mounting groove from the outside of the surrounding wall, and the guide limiting member partially protrudes from the mounting groove and protrudes from the inner side of the surrounding wall.

[0012] Furthermore, the guide limiting member includes a horizontal guide plate and a mounting block disposed at the bottom end of the guide plate, making the guide limiting member T-shaped; the shape of the mounting groove is adapted to the shape of the guide limiting member; the guide plate partially extends out of the mounting groove and protrudes from the inner side of the enclosure.

[0013] Furthermore, the guide limiting member is interference-fitted with the mounting groove; the end of the guide limiting member facing the outside of the enclosure is provided with a limiting protrusion, and the inner wall of the mounting groove is provided with a limiting step corresponding to the limiting protrusion. The limiting protrusion and the limiting step cooperate to limit the depth of the guide limiting member inserted into the mounting groove.

[0014] Furthermore, the base plate is provided with a guide boss, the push card is placed on the guide boss, and the guide limiting member cooperates with the guide boss to form the guide groove of the push card.

[0015] Furthermore, a limiting groove is provided on the side wall of the slot away from the clearance groove, and a limiting protrusion is provided at the lower end of the moving spring corresponding to the limiting groove, which is engaged in the limiting groove.

[0016] Furthermore, the movable spring includes multiple sub-springs stacked together, and the lower end of the sub-spring furthest from the movable spring lead-out plate is bent upward at least partially from the side furthest from the movable spring lead-out plate to form a hook, which constitutes the limiting protrusion; the slot is vertically continuous, and the limiting slot is a blind slot structure with an opening at the lower end.

[0017] Furthermore, the base includes a base plate and two surrounding walls disposed on the edge of the base plate and arranged opposite to each other in the width direction of the moving spring lead-out piece. The upper end of the moving spring lead-out piece is provided with positioning blocks on both sides in the width direction. The top of the inner side of the two surrounding walls is provided with positioning grooves corresponding to the positioning blocks. The upper end of the positioning groove is provided with an opening, and each positioning block is respectively inserted into the corresponding positioning groove.

[0018] Furthermore, the base includes a base plate and two surrounding walls disposed on the edge of the base plate and arranged opposite each other in the width direction of the moving spring lead-out plate. It also includes an armature portion, which is rotatably connected between the two surrounding walls via a rotating shaft. The armature portion includes a driving body and an armature assembly disposed on the driving body. The armature assembly is I-shaped, with its four ends extending out of the driving body. The driving body is rotatably connected between the two surrounding walls via a rotating shaft, and the bottom end of the driving body is inserted into the connecting groove provided by the push card. It also includes a coil portion installed on the base, which includes two opposing yokes. The armature portion fits between the two yokes, and the free ends of the two yokes are respectively inserted into the recesses on both sides of the armature portion. Arc-extinguishing permanent magnets are respectively installed on the outer surfaces of the two surrounding walls at positions corresponding to the moving spring portion.

[0019] The present invention further provides a method for assembling a moving spring assembly of an electromagnetic relay. The electromagnetic relay includes a base, a moving spring portion, and a push clip. The moving spring portion includes a moving spring plate, a moving spring lead plate, and a moving contact. The upper end of the moving spring plate is fixedly connected to the upper end of the moving spring lead plate, and the moving contact is disposed on the moving spring plate. The assembly method includes the following steps:

[0020] The lower end of the movable spring is engaged with the push card, and the lower end of the movable spring lead-out piece is passed through the push card, so that the movable spring, the movable spring lead-out piece and the push card form a movable spring assembly;

[0021] Align the lower end of the moving spring lead-out piece with the moving spring slot of the base, and insert the moving spring assembly into the base from top to bottom until the lower end of the moving spring lead-out piece is inserted into the moving spring slot of the base.

[0022] Furthermore, during the installation of the movable spring assembly, the pusher is first pushed along the direction that deforms the movable spring sheet toward the side of the movable spring lead sheet, so that the pusher is in a misaligned state; then, in the misaligned state of the pusher, the movable spring assembly is inserted downward into the base; when the movable spring assembly is installed in the downward position, the movable spring sheet, along with the pusher, elastically returns to its original position away from the movable spring lead sheet.

[0023] The base includes a base plate and two surrounding walls disposed on the edge of the base plate and arranged opposite to each other in the width direction of the spring lead-out plate. The assembly method further includes the following steps: installing a guide limiting member in at least one of the two surrounding walls, and using the guide limiting member to limit the movement and guide the push card.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. Since the moving spring part of the present invention and the push card form a moving spring assembly, and the moving spring assembly is installed into the base from top to bottom, the present invention is free from setting an opening on the bottom plate of the base to install the push card, and is also free from using a side mounting method to install the push card. The push card can be installed into the base with a high frame structure from top to bottom. Therefore, the present invention does not need to add cover plate parts, which can reduce the risk of glue leakage. Moreover, the base parts have small deformation, and the size and structure are stable, which can better ensure the stability of product performance parameters.

[0026] 2. When the moving spring assembly is installed, the push card is in a misaligned state that deforms the moving spring sheet towards the side of the moving spring lead sheet. When the moving spring assembly is installed downwards, the moving spring sheet, along with the push card, elastically returns to the side away from the moving spring lead sheet. This allows the push card to achieve a misaligned state before the moving spring assembly is installed, creating space to avoid the arc-extinguishing magnet mounting part of the base. This eliminates the need to increase the width of the base to install and operate the push card, and also avoids the stationary contacts of normally closed relays. Therefore, this invention is suitable for smaller relays and is also beneficial for miniaturizing relay design.

[0027] 3. When the push card is in a misaligned state, the protruding parts on both sides of the push card enter the first groove of the two surrounding walls respectively, and move downward along the first groove. This allows the push card to automatically remain in a misaligned state by utilizing the cooperation between the protruding parts on both sides and the first groove during the downward installation of the moving spring assembly. This avoids continuously applying a force to the push card to keep it in a misaligned state, thereby making the installation of the moving spring assembly simpler and less strenuous.

[0028] 4. The bottom of the inner side of the two walls is also provided with a second groove, which can be used to cooperate with the protrusion of the push card to play a certain upper limit and motion guidance effect on the push card.

[0029] 5. The present invention further employs a guide limiting component to provide an upper limit and motion guidance for the push card, which can provide a precise upper limit and motion guidance for the push card, thereby ensuring smooth movement of the push card, reducing the degree of twisting during the push card's operation, ensuring that the contact point between the push card and the moving spring remains basically unchanged, and ensuring good consistency of the moving spring's reaction force, thereby improving the consistency of the relay's operating time. At the same time, due to the good consistency of the pressure on the contact points, the electrical life and reliability of the relay are higher.

[0030] 6. Because the enclosure wall has a mounting groove penetrating its inner and outer surfaces, the guide limiting member is inserted into the mounting groove from the outside of the enclosure wall, and the guide limiting member partially protrudes from the mounting groove and protrudes from the inner surface of the enclosure wall. This makes the installation of the guide limiting member of the present invention convenient and reduces the internal space occupied by the base. In particular, the interference fit between the guide limiting member and the mounting groove can further improve the positional stability of the guide limiting member, thereby further improving the guiding effect of the guide limiting member on the push card.

[0031] 7. The guide limiting component preferably includes the guide plate and the mounting block, which can satisfy the guiding and limiting functions of the guide limiting component, while also improving the installation reliability of the guide limiting component.

[0032] 8. The upper surface of the base plate is further provided with guide bosses, which can reduce the contact area between the push card and the upper surface of the base plate, thereby reducing the sliding friction of the push card and further improving the smoothness of the push card's movement.

[0033] 9. The lower end of the moving spring is bent to form a hook, which cooperates with the limiting groove on the corresponding side of the card slot. This makes the structure of the moving spring and the push card more simple, and the limiting cooperation effect is better. It also makes the overall structure of the moving spring assembly composed of the moving spring and the push card more stable, which facilitates transportation and avoids the loss of parts.

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the assembly method of the electromagnetic relay and its moving spring assembly of the present invention is not limited to the embodiments. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural schematic diagram of the electromagnetic relay of the present invention;

[0036] Figure 2 This is a three-dimensional structural schematic diagram of the movable spring portion of the present invention;

[0037] Figure 3 This is a right view of the movable spring portion of the present invention;

[0038] Figure 4 This is a three-dimensional structural diagram of the push card of the present invention. Figure 1 ;

[0039] Figure 5 This is a top view of the push card of the present invention;

[0040] Figure 6 This is a three-dimensional structural diagram of the push card of the present invention. Figure 2 ;

[0041] Figure 7 This is a cross-sectional view of the push card of the present invention;

[0042] Figure 8 This is a three-dimensional structural diagram of the connection structure between the moving spring and the push card of the present invention;

[0043] Figure 9 This is a cross-sectional view of the connection structure between the moving spring portion and the push card of the present invention;

[0044] Figure 10 This is a three-dimensional structural diagram of the base of the present invention;

[0045] Figure 11 This is a cross-sectional view of the base of the present invention;

[0046] Figure 12 This is a three-dimensional structural schematic diagram of the guide and limiting member of the present invention;

[0047] Figure 13 This is a front view of the guide limiting component of the present invention;

[0048] Figure 14 This is a top view of the guide limiting member of the present invention;

[0049] Figure 15 This is a side view of the guide limiting member of the present invention;

[0050] Figure 16 This is a three-dimensional structural diagram of the base and guide limiting member of the present invention in an assembled state;

[0051] Figure 17 This is a cross-sectional view of the base and guide limiting member of the present invention in an assembled state;

[0052] Figure 18 This is an assembly diagram of the moving spring assembly of the present invention being installed into the base. Figure 1 (Cross-section);

[0053] Figure 19 This is an assembly diagram of the moving spring assembly of the present invention being installed into the base. Figure 2 (Cross-section);

[0054] Figure 20 This is an assembly diagram of the moving spring assembly of the present invention being installed into the base. Figure 3 ;

[0055] Figure 21 yes Figure 20 Top view;

[0056] Figure 22 yes Figure 20 A sectional view;

[0057] Figure 23 This is an assembly diagram of the moving spring assembly of the present invention being installed into the base. Figure 4 (Cutaway view)

[0058] Figure 24This is an assembly diagram of the moving spring assembly of the present invention being installed into the base. Figure 5 (Cross-section);

[0059] Figure 25 This is a three-dimensional schematic diagram of the dynamic spring assembly, guide limiting member and base of the present invention in an assembled state; Figure 26 yes Figure 25 A sectional view;

[0060] Figure 27 This is a three-dimensional structural schematic diagram of the electromagnetic relay of the present invention (excluding the outer casing);

[0061] Figure 28 This is a cross-sectional view of the electromagnetic relay of the present invention;

[0062] In the diagram, 1. Moving spring section; 11. Moving spring lead-out piece; 111. Support platform; 112. Notch; 113. Positioning block; 12. Moving spring piece; 121. Sub-spring piece; 122. U-shaped bend; 123. Hook; 13. Moving contact; 2. Pushing clip; 21. Slot; 211. Limiting slot; 22. Clearance slot; 221. Protrusion; 23. Connecting slot; 24. Protrusion; 3. Base; 31. Base plate; 311. Guide boss; 312. Moving spring slot; 32. Enclosure; 321. Mounting slot; 322. Positioning slot. 323. Receiving groove; 324. First groove; 325. Second groove; 33. Guide slide; 4. Armature part; 41. Drive body; 42. Armature; 43. Permanent magnet; 5. Rotating shaft; 6. Coil part; 61. Coil frame; 62. Enamelled wire; 63. Iron core; 64. Yoke; 7. Stationary spring part; 71. Stationary spring sheet; 72. Stationary contact; 8. Guide limiting part; 81. Guide plate; 82. Mounting block; 811 / 821. Limiting protrusion; 9. Outer shell; 10. Arc extinguishing permanent magnet; 20. Magnetic shielding sheet. Detailed Implementation

[0063] In this invention, the use of terms such as "up," "down," "left," and "right" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings. These terms are used solely for the purpose of describing the invention and do not imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] Furthermore, in the description of this invention, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," etc., should be interpreted broadly. 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 within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0065] Please see Figures 1-28 As shown, an electromagnetic relay of the present invention includes a base 3, a moving spring portion 1, and a pusher 2. The base 3 specifically includes a base plate 31 and two surrounding walls 32 protruding upward from the edge of the base plate 31. The two surrounding walls 32 are arranged opposite to each other in the width direction of the moving spring lead-out piece 11. The moving spring portion 1 includes a movable spring piece 12 capable of elastic deformation, 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 disposed on the moving spring piece 12 and faces away from the moving spring lead-out piece 11. Specifically, the moving contact 13 is riveted approximately to the middle position of the moving spring piece 12. The moving spring piece 12 includes multiple sub-spring pieces 121, which are stacked together. Each sub-spring piece 121 has a U-shaped bend 122 protruding away from the moving spring lead-out piece 11 at its upper end. Figure 2 , Figure 3 As shown.

[0066] like Figures 4-7 As shown, the push card 2 is provided with a slot 21, a clearance slot 22, and a connecting slot 23 from left to right. The clearance slot 22 is located between the slot 21 and the connecting slot 23. The slot 21, clearance slot 22, and connecting slot 23 are all through-slot structures that are vertically connected and closed on all sides. The lower end of the aforementioned movable spring 12 is engaged in the slot 21, thereby limiting the push card 2. The lower end of the movable spring lead-out piece 11 passes through the clearance slot 22 from top to bottom, and a support and limiting structure is provided between the movable spring lead-out piece 11 and the push card 2 to prevent the push card 2 from detaching from the movable spring lead-out piece 11. Therefore, after the movable spring part 1 and the push card 2 are assembled, a stable movable spring assembly is formed, which facilitates the transfer and / or assembly of the movable spring assembly.

[0067] In this embodiment, the aforementioned support and limiting structure includes a support platform 111 disposed on the movable spring lead-out piece 11 and a protrusion 221 disposed on the groove wall of the clearance through groove 22, the protrusion 221 resting on the support platform 111. This makes the support and limiting structure relatively simple, and the present invention does not require the introduction of additional components, which helps to reduce costs and simplify the assembly process. In other embodiments, the support and limiting structure is a limiting member fitted onto the movable spring lead-out piece and located below the push card, so as to support the push card using this limiting member.

[0068] There are two support platforms 111, located on both sides of the moving spring lead-out piece 11 in the width direction. There are also two protrusions 221, located on the side of the clearance groove 22 away from the slot 21. Each protrusion 221 engages with one of the two support platforms 111. Specifically, the moving spring lead-out piece 11 has notches 112 on both sides in the width direction. The lower walls of the two notches 112 constitute the two support platforms 111, and the upper walls of the two notches 112 are located above the push card 2. The notches 112 are preferably square notches, capable of accommodating the push card 2, which can move within the notches 112.

[0069] In this embodiment, after the movable spring 12 is connected to the movable spring lead-out piece 11, the movable spring 12 tilts away from the movable spring lead-out piece 11. 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 12 and the relatively 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 slot 21 away from the clearance slot 22 and the protrusion 221. The lower end of the movable spring 12 is inserted into the slot 21 in the deformed state towards the movable spring lead-out piece 11, and the movable spring 12 drives the push card 2 to move by elastically restoring towards the side away from the movable spring lead-out piece 11, so that the protrusion 221 is moved above the support platform 111, thereby realizing the supporting function of the support platform 111 on the protrusion 221. Therefore, the present invention achieves a special cooperation method between the moving spring 12 and the push card 2, ensuring that the lower end of the moving spring lead-out piece 11 can freely pass through the clearance slot 22 of the push card 2. At the same time, the elasticity of the moving spring 12 itself is used to realize that the moving spring lead-out piece 11 provides stable support for the push card 2, so that the structure of the push card 2 and the moving spring part 1 is more stable and convenient for transportation after being assembled into a moving spring assembly.

[0070] In this embodiment, a limiting groove 211 is provided on the side wall of the slot 21 away from the clearance slot 22. A limiting protrusion is provided at the lower end of the movable spring 12 corresponding to the limiting groove 211, and the limiting protrusion is engaged in the limiting groove 211. Specifically, among the multiple sub-springs of the movable spring 12, the lower end of the sub-spring furthest from the movable spring lead-out piece 11 is at least partially bent upward from the side away from the movable spring lead-out piece 11 to form a hook 123, and this hook 123 constitutes the limiting protrusion. The limiting groove 211 is a blind groove structure with an opening at the lower end to facilitate better entry of the hook 123 into the limiting groove 211.

[0071] The movable spring assembly is installed into the base 3 from top to bottom and is located between the two walls 32 of the base 3, with the lower end of the movable spring lead-out foot 11 inserted into the movable spring slot 312 provided on the base plate 31. In particular, when the movable spring assembly is installed, the push card 2 is in a misaligned state that deforms the movable spring piece 12 toward the side of the movable spring lead-out piece 11. When the movable spring assembly is installed downwards into place, the movable spring piece 12, along with the push card 2, elastically returns to the side away from the movable spring lead-out piece 11.

[0072] In this embodiment, the inner sides of the two walls 32 of the base 3 are respectively provided with vertically extending first grooves 324. The upper and lower ends of the first grooves 324 are respectively provided with openings. The first grooves 324 of the two walls 32 are arranged opposite to each other. The push card 2 is provided with protrusions 24 on both sides of the moving spring lead-out piece 11 in the width direction. When the push card 2 is in the misaligned state, the protrusions 24 on both sides of the push card 2 enter the first grooves 324 of the two walls 32 respectively and move downward along the grooves. After the moving spring assembly is installed downward, the protrusions 24 on both sides of the push card 2 exit the corresponding first grooves 324 respectively. In this way, during the downward installation of the moving spring assembly, the push card 2 can automatically maintain the misaligned state by utilizing the cooperation of the protrusions 24 on both sides with the grooves, thereby avoiding the need to continuously provide a force to keep the push card 2 in the misaligned state, thus making the installation of the moving spring assembly simpler and less labor-intensive. The inner sides of the two enclosure walls 32 are each provided with a second groove 325 extending in the thickness direction of the spring lead-out piece 11. The lower end of the first groove 324 is connected to the second groove 325. When the spring assembly is installed in the base 3, the lower end of the spring lead-out piece 11 is aligned with the spring slot 312. The pusher 2 moves in a direction that deforms the spring piece 12 toward one side of the spring lead-out piece 11, so that the protrusion 24 is aligned with the first groove 324. When the spring assembly moves downward into place, the protrusion 24 enters the second groove 325 from the first groove 324, and the spring piece 12, along with the pusher 2, elastically returns to its original position away from the spring lead-out piece 11.

[0073] The base 3 and / or the movable spring portion 1 are provided with guide limiting members to limit and guide the movement of the push card 2. In this embodiment, the base 3 is provided with guide limiting member 8, but it is not limited to this. In other embodiments, the movable spring portion is provided with guide limiting member, or both the movable spring portion and the base are provided with guide limiting member; when the guide limiting member is provided on the movable spring portion, the guide limiting member can be connected to or integrally formed on the movable spring sheet or movable spring lead-out sheet of the movable spring portion. In this embodiment, at least one of the two surrounding walls 32 of the base 3 is equipped with the guide limiting member 8. Specifically, the guide limiting member 8 is respectively installed at the bottom of the two surrounding walls 32 of the base 3. The second groove 325 communicates with the mounting groove 321.

[0074] As a preferred embodiment, the bottom of the two walls 32 of the base 3 are respectively provided with mounting grooves 321 that penetrate their inner and outer walls. The guide limiter 8 is inserted into the mounting groove 321 from the outside of the wall 32, and the guide limiter 8 partially protrudes from the mounting groove 321 and protrudes from the inner side of the wall 32 to provide upper limit and motion guidance for the push card 2.

[0075] In this embodiment, as Figures 12-15 As shown, the guide limiting member 8 includes a horizontal guide plate 81 and a mounting block 82 located at the bottom of the guide plate 81, making the guide limiting member 8 T-shaped in both front and rear views. The shape of the mounting groove 321 on each enclosure 32 is adapted to the shape of the guide limiting member 8. Thus, while fulfilling the guiding and limiting functions of the guide limiting member 8, it also improves the installation reliability of the guide limiting member 8. In particular, the guide limiting member 8 and the mounting groove 321 have an interference fit, which further improves the fixation and reliability of the guide limiting member 8 after installation. After the guide limiting member 8 is inserted into the mounting groove 321, the guide plate 81 partially protrudes from the mounting groove 321 and protrudes from the inner side of the enclosure 32, as shown. Figure 17 As shown, this implements the upper limit position and motion guidance of the push card 2.

[0076] The guide limiting member 8 has a limiting protrusion at one end facing the outer side of the enclosure 32, and a limiting step is provided on the inner wall of the mounting groove 321 corresponding to the limiting protrusion. The limiting protrusion and the limiting step cooperate to limit the depth of the guide limiting member 8 inserted into the mounting groove 321. Specifically, as shown... Figure 12 , Figure 14 , Figure 15 As shown, the guide plate 81 has limiting protrusions 811 on the left and right sides of the end facing the outer side of the enclosure 32, and the mounting block 82 has limiting protrusions 821 at the bottom of the end facing the outer side of the enclosure 32. Each limiting protrusion cooperates with the corresponding limiting step to limit the depth of the guide limiting member 8 into the mounting groove 321, thereby further improving the installation reliability of the guide limiting member 8.

[0077] like Figure 10 , Figure 11 As shown, the upper surface of the base plate 31 is provided with a guide boss 311, which provides support and movement guidance for the push card 2. Specifically, guide bosses 311 are respectively provided at the positions where the upper surface of the base plate 31 meets the two surrounding walls 32. The guide bosses 311 are elongated and extend along the movement direction of the push card 2. The guide limiting member 8 on the same side cooperates with the guide bosses 311 to form the guide groove 33 of the push card 2, as shown. Figure 17 As shown.

[0078] In this embodiment, the upper end of the moving spring lead-out piece 11 is provided with positioning blocks 113 on both sides in the width direction. The top of the inner side of the two surrounding walls 32 of the base is provided with positioning grooves 322 corresponding to the positioning blocks 113. The upper end of the positioning groove 322 is provided with an opening. When the moving spring assembly is installed from top to bottom, each positioning block 113 is inserted into the corresponding positioning groove 322 from top to bottom.

[0079] The invention also includes an armature portion 4, which is rotatably connected between the two walls 32 of the base 3 via a rotating shaft 5, and the bottom of the armature portion 4 is inserted into the corresponding connecting slot 23 of the push card 2. Specifically, the armature portion 4 includes an insulated drive body 41 and an armature assembly disposed on the drive body 41. The armature assembly is I-shaped, with its four ends extending out of the drive body 41. The drive body 41 is rotatably connected to the frame structure 31 of the base 3 via a rotating shaft 5, and the bottom end of the drive body 41 is connected to the push card 2. The armature assembly specifically consists of two parallel armatures 42 and a permanent magnet 43 clamped between the two armatures 41. The invention also includes a coil portion 6, which includes a coil frame 61, enameled wire 62 wound around the coil frame 61, two yokes 64, and an iron core 63. The iron core 63 passes through a through hole in the coil frame, and the two yokes 64 are L-shaped, with one side of each yoke 64 riveted to both ends of the iron core 63. The free ends of the two yokes 64 are respectively inserted into the recesses on both sides of the armature portion 4, that is, the other side of one yoke 64 fits between the upper ends of the two armatures 42, and the other side of the other yoke 64 fits between the lower ends of the two armatures 42, as shown. Figure 28 As shown. Therefore, the present invention constitutes a magnetic latching relay, but is not limited thereto.

[0080] The invention also includes a stationary spring portion 7, which includes a stationary spring sheet 71 inserted into the base 3 and a stationary contact 72 disposed on the stationary spring sheet 71. The stationary contact 72 cooperates with a moving contact 13 on the moving spring portion 1. In the closed state, the stationary spring portion 7 pushes the moving spring sheet 12, causing the moving spring sheet 12 to deform toward the side of the moving spring lead-out piece 11. Therefore, the size of the protrusion 221 is designed to be small, so that after the moving spring portion 1 is assembled with the push card 2, the moving spring lead-out piece 11 will basically contact the side wall of the clearance groove 22 where the protrusion 221 is located. In other embodiments, the size of the protrusion 221 in the sliding direction of the push card 2 can be increased so that after the moving spring portion 1 is assembled with the push card 2, there is a suitable gap between the moving spring lead-out piece 11 and the side wall of the clearance groove 22 where the protrusion 221 is located, leaving room for the push card 2 to drive the moving spring sheet 12 to move away from the moving spring lead-out piece 11.

[0081] In this embodiment, arc-extinguishing permanent magnets 10 are respectively installed on the outer surfaces of the two walls 32 of the base at positions corresponding to the moving spring portion, which can improve the arc-extinguishing function of the present invention. Specifically, the outer surfaces of the two walls 32 are respectively provided with receiving grooves 323, the arc-extinguishing permanent magnets 10 are installed in the receiving grooves 323, and are covered and externally shielded by magnetic shielding sheets 20. The present invention also includes a shell 9, the bottom end of which is connected to the base 3, and the stationary spring portion 7, the moving spring portion 1, the push card 2, the armature portion 4, the coil portion 6, etc. are contained in its shell cavity. The present invention also includes an auxiliary moving spring 30 and an auxiliary stationary spring 40 inserted into the base 1. The auxiliary moving spring 30 and the auxiliary stationary spring 40 cooperate with each other, and the auxiliary moving spring 30 is driven by the armature portion 4. The closed state of the auxiliary moving spring 30 and the auxiliary stationary spring 40 is the same as the closed state of the moving spring portion 1 and the stationary spring portion 7.

[0082] The assembly process of the moving spring assembly of the electromagnetic relay of the present invention is as follows:

[0083] Move the moving spring assembly above the base 3, and align the lower end of the moving spring lead-out piece 11 with the moving spring slot 312 of the base, as follows. Figure 18 As shown;

[0084] Along the direction that deforms the movable spring 12 toward the side of the movable spring lead-out piece 11 (i.e. Figure 19 Push the pusher card 2 a certain distance in the rightward direction (as shown), such as Figure 19 As shown, the protrusions 24 on both sides of the push card 2 are respectively aligned with the upper openings of the first grooves 324 of the two surrounding walls 32;

[0085] Move the spring assembly downwards so that the protrusions 24 on both sides of the push card 2 enter the first grooves 324 of the two surrounding walls 32, as follows. Figures 20-22As shown, the push card 2 is released. Since the protrusions 24 on both sides of the push card 2 have entered the first grooves 324 of the two walls 32, the two form a limit. Therefore, releasing the push card 2 at this time will not cause the push card 2 to reset to the left.

[0086] Continue moving the spring assembly downwards until it reaches its final position. At this point, the protrusion 24 enters the second groove 325 from the first groove 324, the lower end of the spring lead-out piece 11 is inserted into the spring slot 312 of the base, the push card 2 is located on the guide boss 311 of the base plate 31, and the spring piece 12, along with the push card 2, elastically returns to the side away from the spring lead-out piece 11. Figure 23 , Figure 24 As shown, where Figure 23 This illustrates the state in which the push card 2 reaches the bottom position of the first groove 324;

[0087] Two guide limiting members 8 are respectively inserted into the mounting grooves 321 at the bottom of the enclosure 32 from the outside of the enclosure 32, and the guide plates 81 of the guide limiting members 8 partially protrude from the mounting grooves 321 and protrude from the inner side of the enclosure 32, thereby achieving upper limit positioning and motion guidance for the push card 2. Figure 25 , Figure 26 As shown.

[0088] Therefore, this invention allows the push card 2 to be installed from top to bottom into the frame-type base 3, eliminating the need for an opening in the base plate 31 of the base 3 to install the push card 2, and also eliminating the need for a side-mounted installation method. This eliminates the need for additional cover parts, reducing the risk of adhesive leakage. Furthermore, the base parts exhibit minimal deformation, and their dimensions and structure are stable, ensuring stable product performance parameters. In addition, this invention uses a guide limiter 8 to provide upper limit and motion guidance for the push card 2. The fixed position and size of the guide limiter 8 ensure smooth movement of the push card 2, reducing the degree of twisting during its operation. This ensures that the contact point between the push card 2 and the moving spring 12 remains essentially unchanged, resulting in good consistency of the reaction force of the moving spring 12. This improves the consistency of the relay's operating time. Simultaneously, due to the good consistency of the pressure on the contacts, the electrical life and reliability of the relay are higher.

[0089] Specifically, during the installation of the moving spring assembly, the push card 2 is pre-installed with a staggered position to create space avoidance, making the invention applicable to smaller relays and facilitating the miniaturization of the relay design. This is because, on the one hand, the present invention is a miniaturized relay; if the push card 2 is installed directly downwards without staggering, it will cause interference between the push card 2 and the stationary contact 72 of the stationary spring portion 7. Therefore, the present invention staggers the installation of the push card 2 to avoid the stationary contact 72 of the stationary spring portion 7. On the other hand, the two walls 32 of the base 3 are usually equipped with arc-extinguishing permanent magnets 10. The width between the two walls 32 is small, and the parts of the two walls 32 equipped with arc-extinguishing permanent magnets 10 are not suitable for slotting to avoid the push card 2. However, the moving spring lead-out piece 11 needs to pass through the push card 2. Therefore, the width at the position corresponding to the push card 2 and the moving spring lead-out piece 11 is very large, greater than the width at the position of the base 3 where the arc-extinguishing permanent magnet 10 is installed. Therefore, if the push card 2 is installed directly downwards, it will be impossible to install the push card 2 into the base 3. Therefore, this invention employs a staggered installation method for the push card 2, allowing its wider portion to avoid the areas where the arc-extinguishing permanent magnet 10 is installed on the two surrounding walls 32 during downward installation. Only after installation is complete does the wider portion (i.e., the protrusion 24) of the push card 2 pass through the second groove, allowing the push card 2 to slide normally. Thus, this invention allows the push card 2 to be staggered into the base 3, reaching the bottom of the base 3 before resetting with the follower spring 12. This solves the problem of inconvenient direct downward installation of the push card 2 in small spaces, making this invention suitable for relays with smaller length and width dimensions, thus facilitating the miniaturization of relay designs.

[0090] The present invention provides a method for assembling a moving spring assembly of an electromagnetic relay, comprising the following steps:

[0091] 1) Insert the lower end of the movable spring into the slot provided by the push card, and pass the lower end of the movable spring lead-out piece through the clearance slot provided by the push card, so that the movable spring, the movable spring lead-out piece and the push card form a movable spring assembly;

[0092] 2) Align the lower end of the moving spring lead-out piece with the moving spring slot of the base, and insert the moving spring assembly into the base from top to bottom until the lower end of the moving spring lead-out piece is inserted into the moving spring slot of the base.

[0093] Furthermore, step 2) includes the following steps:

[0094] 21) Move the moving spring assembly above the base and align the lower end of the moving spring lead-out piece with the moving spring slot of the base;

[0095] 22) Push the pusher in the direction that deforms the movable spring sheet toward one side of the movable spring lead-out sheet, so that the pusher is in a misaligned state;

[0096] 23) In the state of the misaligned push card, move the moving spring assembly downward until the moving spring assembly moves downward into place, and the moving spring plate, carrying the push card, elastically returns to the side away from the moving spring lead plate.

[0097] Furthermore, the base includes a base plate and two surrounding walls disposed on the edge of the base plate and arranged opposite to each other in the width direction of the spring lead-out plate. The assembly method further includes step 3: installing a guide limiting member in at least one of the two surrounding walls, thereby limiting and guiding the push card.

[0098] The present invention discloses an assembly method for a moving spring assembly of an electromagnetic relay. Taking an electromagnetic relay of the present invention as an example, the installation method of its moving spring assembly is described in detail:

[0099] 1) Insert the lower end of the movable spring 12 into the slot 21 of the push card 2, and pass the lower end of the movable spring lead-out piece 11 through the clearance slot 22 of the push card 2, so that the movable spring 12, the movable spring lead-out piece 11 and the push card 2 form a movable spring assembly;

[0100] 2) Align the lower end of the moving spring lead-out piece 11 with the moving spring slot 312 of the base, and insert the moving spring assembly into the base from top to bottom until the lower end of the moving spring lead-out piece 11 is inserted into the moving spring slot 312 of the base.

[0101] 3) Install guide limiting components 8 at the bottom of the two enclosures respectively, use the guide limiting components 8 to limit the push card 2, and provide guidance for the movement of the push card 2.

[0102] Furthermore, step 2) includes the following steps:

[0103] 21) Move the moving spring assembly above the base and align the lower end of the moving spring lead-out piece 11 with the moving spring slot 312 of the base;

[0104] 22) Push the push card 2 in the direction that deforms the movable spring 12 toward one side of the movable spring lead-out piece 11 until the protrusions 24 on both sides of the push card 2 are respectively aligned with the upper opening of the first groove 324 of the two surrounding walls;

[0105] 23) Move the spring assembly downward so that the protrusions 24 on both sides of the push card 2 enter the first grooves 324 of the two walls respectively, and release the push card 2;

[0106] 24) Move the spring assembly downwards into place, the protrusion 24 enters the second groove 325 from the first groove 324, the lower end of the spring lead-out piece 11 is inserted into the spring slot 312 of the base, and the spring piece 12, along with the push card 2, elastically returns to the side away from the spring lead-out piece 11.

[0107] In step 3), the guide limiting member 8 is inserted from the outside of the enclosure into the mounting groove 321 provided at the bottom of the enclosure 32, and the guide limiting member 8 partially protrudes from the mounting groove 321 and protrudes from the inner side of the enclosure 32.

[0108] The assembly method of the electromagnetic relay and its moving spring assembly of the present invention, the parts not described herein are the same as or can be implemented using the prior art.

[0109] The above embodiments are only used to further illustrate the assembly method of an electromagnetic relay and its moving spring assembly according to the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An electromagnetic relay, comprising a base, a movable spring portion, and a pusher, wherein the movable spring portion includes a movable spring sheet capable of elastic deformation, a movable spring lead-out sheet, and a movable contact, the upper end of the movable spring sheet being fixedly connected to the upper end of the movable spring lead-out sheet, and the movable contact being disposed on the movable spring sheet; characterized in that: The lower end of the movable spring is engaged in the slot provided by the push card, and the lower end of the movable spring lead-out piece passes through the clearance slot provided by the push card, so that the movable spring part and the push card form a movable spring assembly. The movable spring assembly is installed into the base from top to bottom, and the lower end of the movable spring lead-out piece is inserted into the movable spring slot provided by the base. When the moving spring assembly is not installed in place, the pusher is in a misaligned state that deforms the moving spring sheet toward the side of the moving spring lead sheet. When the moving spring assembly is installed in place downwards, the moving spring sheet, along with the pusher, elastically returns to the side away from the moving spring lead sheet.

2. The electromagnetic relay according to claim 1, characterized in that: The base includes a base plate and two surrounding walls disposed on the edge of the base plate and arranged opposite each other in the width direction of the spring lead-out piece. The inner sides of the two surrounding walls are respectively provided with first grooves extending vertically. The upper and lower ends of the first grooves are respectively provided with openings. The push card is provided with protrusions on both sides of the spring lead-out piece in the width direction. When the push card is in the misaligned state, the protrusions on both sides of the push card enter the first grooves of the two surrounding walls respectively and move downward along the first grooves.

3. The electromagnetic relay according to claim 2, characterized in that: The bottom inner sides of the two walls are respectively provided with a second groove extending along the thickness direction of the spring lead-out piece, and the lower end of the first groove is connected to the second groove; when the spring assembly is installed downwards, the protrusion enters the second groove from the first groove.

4. The electromagnetic relay according to claim 1, characterized in that: The base and / or the moving spring portion are provided with guide limiting members to limit and guide the push card.

5. The electromagnetic relay according to claim 4, characterized in that: The base includes a base plate and two surrounding walls disposed on the edge of the base plate and arranged opposite to each other in the width direction of the spring lead-out plate. At least one of the two surrounding walls is equipped with the guide limiting member, and the bottom of the surrounding wall on which the guide limiting member is installed is provided with a mounting groove penetrating its inner and outer sides. The guide limiting member is inserted into the mounting groove from the outside of the surrounding wall, and the guide limiting member partially protrudes from the mounting groove and protrudes from the inner side of the surrounding wall.

6. The electromagnetic relay according to claim 5, characterized in that: The guide limiting component includes a horizontal guide plate and a mounting block located at the bottom of the guide plate, making the guide limiting component T-shaped; the shape of the mounting groove is adapted to the shape of the guide limiting component; the guide plate partially extends out of the mounting groove and protrudes from the inner side of the enclosure.

7. The electromagnetic relay according to claim 5 or 6, characterized in that: The guide limiting member is interference-fitted with the mounting groove; the end of the guide limiting member facing the outside of the enclosure is provided with a limiting protrusion, and the inner wall of the mounting groove is provided with a limiting step corresponding to the limiting protrusion. The limiting protrusion and the limiting step cooperate to limit the depth of the guide limiting member inserted into the mounting groove.

8. The electromagnetic relay according to claim 5, characterized in that: The base plate is provided with a guide boss, the push card is placed on the guide boss, and the guide limiting member cooperates with the guide boss to form the guide groove of the push card.

9. The electromagnetic relay according to claim 1, characterized in that: The side wall of the slot away from the clearance slot is provided with a limiting groove, and the lower end of the moving spring is provided with a limiting protrusion corresponding to the limiting groove. The limiting protrusion is engaged in the limiting groove.

10. The electromagnetic relay according to claim 9, characterized in that: The movable spring includes multiple sub-springs stacked together. The lower end of the sub-spring furthest from the movable spring lead-out plate is bent upward at least partially from the side furthest from the movable spring lead-out plate to form a hook, which constitutes the limiting protrusion. The slot is vertically continuous, and the limiting slot is a blind slot structure with an opening at the lower end.

11. The electromagnetic relay according to claim 1, characterized in that: The base includes a base plate and two surrounding walls disposed on the edge of the base plate and arranged opposite each other in the width direction of the moving spring lead-out piece. The upper end of the moving spring lead-out piece is provided with positioning blocks on both sides in the width direction. The top of the inner side of the two surrounding walls is provided with positioning grooves corresponding to the positioning blocks. The upper end of the positioning groove is provided with an opening, and each positioning block is respectively inserted into the corresponding positioning groove.

12. The electromagnetic relay according to claim 1, characterized in that: The base includes a base plate and two surrounding walls disposed on the edge of the base plate and arranged opposite each other in the width direction of the moving spring lead-out plate. It also includes an armature portion, which is rotatably connected between the two surrounding walls via a rotating shaft. The armature portion includes a drive body and an armature assembly disposed on the drive body. The armature assembly is I-shaped, with its four ends extending out of the drive body. The drive body is rotatably connected between the two surrounding walls via a rotating shaft, and the bottom end of the drive body is inserted into the connecting groove provided by the push card. It also includes a coil portion installed on the base, which includes two opposing yokes. The armature portion fits between the two yokes, and the free ends of the two yokes are respectively inserted into the recesses on both sides of the armature portion. Arc-extinguishing permanent magnets are respectively installed on the outer surfaces of the two surrounding walls at positions corresponding to the moving spring portion.

13. A method for assembling a moving spring assembly of an electromagnetic relay, the electromagnetic relay comprising a base, a moving spring portion, and a pusher clip, the moving spring portion comprising a moving spring plate, a moving spring lead plate, and a moving contact, the upper end of the moving spring plate being fixedly connected to the upper end of the moving spring lead plate, and the moving contact being disposed on the moving spring plate; characterized in that: The assembly method includes the following steps: The lower end of the movable spring is engaged with the push card, and the lower end of the movable spring lead-out piece is passed through the push card, so that the movable spring, the movable spring lead-out piece and the push card form a movable spring assembly; Align the lower end of the moving spring lead-out piece with the moving spring slot of the base, and insert the moving spring assembly into the base from top to bottom until the lower end of the moving spring lead-out piece is inserted into the moving spring slot of the base. When installing the moving spring assembly, first push the pusher in the direction that deforms the moving spring sheet toward one side of the moving spring lead sheet, so that the pusher is in a misaligned state; then, in the misaligned state of the pusher, insert the moving spring assembly downward into the base; when the moving spring assembly is installed in the downward position, the moving spring sheet, along with the pusher, elastically returns to its original position away from the moving spring lead sheet.

14. The assembly method of the moving spring assembly of the electromagnetic relay according to claim 13, characterized in that: The base includes a base plate and two surrounding walls disposed on the edge of the base plate and arranged opposite to each other in the width direction of the spring lead-out plate. The assembly method further includes the following steps: installing a guide limiting member in at least one of the two surrounding walls, and using the guide limiting member to limit the movement and guide the push card.

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