Electromagnetic relay

Abstract

The utility model discloses an electromagnetic relay, which comprises a base, a movable spring part and a pushing card, the movable spring part comprises a movable spring sheet capable of elastically deforming, 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; the lower end of the movable spring is clamped in a clamping groove formed in the pushing clamp, and the lower end of the movable spring leading-out piece penetrates through a receding through groove formed in the pushing clamp, so that the movable spring part and the pushing clamp form a movable spring assembly, and the movable spring assembly is installed in the base from top to bottom. And the lower end of the movable spring lead-out sheet is inserted into a movable spring slot arranged on the base. According to the utility model, the pushing card can be arranged in the base adopting a high enclosure frame type structure from top to bottom, so that a cover plate part does not need to be added, the glue leakage risk can be reduced, and the stability of performance parameters of a product can be better ensured.

Description

Technical Field

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

[0002] An electromagnetic relay is an electronic control device that is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit.

[0003] With the diversification of power system applications, relays are required to have high short-circuit current resistance, high load, and miniaturization. Short-circuit faults are inevitable in applications such as power systems. If the relay does not have the ability to withstand short-circuit currents, once a short circuit occurs, the fault range of the entire circuit will expand, affecting the stability and reliability of the system. At present, the anti-short-circuit structure of the relay contact part is designed to connect the movable spring piece to one end of the movable spring lead-out piece, and the other end of the movable spring piece and the movable spring lead-out piece are in the same direction, that is, the movable spring piece and the movable spring lead-out piece are arranged side by side. When one end of the movable spring lead-out piece partially penetrates the base from top to bottom, the exposed part serves as a terminal connected to the external circuit. At this time, the free end of the movable spring piece is at the bottom of the base. The push card, as a linkage part, is usually also placed at the bottom of the base, which is more conducive to the movement of the movable spring piece. Since the relay controls a large load, in order to reduce the temperature rise, the exposed terminal width of the relay is large. In order to facilitate the installation of the push card, the existing technology usually provides an opening on the bottom plate of the base, and the push card is installed into the base from the opening of the bottom plate. After the push card is assembled, the opening is sealed by the cover part. The problem with this solution is that the base has an irregular shape, injection molding is difficult, and the parts have large warping and deformation, which will cause the cover to be unable to fit tightly with the base. The dimensional accuracy of the slide groove formed by the base and the cover is poor, which will cause the push block to move unsmoothly. At the same time, due to the poor fit between the cover and the base, glue can easily flow into the interior of the relay, gluing the push card to the base, causing the relay to fail to operate.

[0004] The existing technology also uses a side-insertion structure for the movable spring. This structure means that the base has no front side plate. This structure requires the movable spring to be pre-assembled with the push card, magnetic circuit, and armature before being installed into the base. The rear side plate of the base has a slide groove to accommodate the push card. Since there is no front side plate, a cover plate is required. The slide groove formed by the cover plate and the base accommodates the push card. Due to the poor fit of the cover plate, the height of the slide grooves on the front and back sides of the base that accommodate the push card is difficult to align, which also affects the movement of the push card. Utility Model Content

[0005] The utility model aims to solve the technical problems existing in the prior art and provides an electromagnetic relay. Through structural improvement, the push card can be installed into a base with a frame structure from top to bottom along with the spring portion, thereby eliminating the need to provide an opening on the bottom plate of the base.

[0006] The technical solution adopted by the utility model to solve the technical problem is: an electromagnetic relay, including a base, a dynamic spring part and a push card, the dynamic spring part includes a dynamic spring piece that can be elastically deformed, a dynamic spring lead-out piece and a dynamic contact, the upper end of the dynamic spring piece is fixedly connected to the upper end of the dynamic spring lead-out piece, and the dynamic contact is provided on the dynamic spring piece; the lower end of the dynamic spring piece is clamped in a clamping groove provided in the push card, the lower end of the dynamic spring lead-out piece passes through a clearance groove provided in the push card, so that the dynamic spring part and the push card form a dynamic spring assembly, the dynamic spring assembly is installed into the base from top to bottom, and the lower end of the dynamic spring lead-out piece is inserted into the dynamic spring slot provided in the base.

[0007] Furthermore, when the dynamic spring assembly is installed, the push card is in a dislocated state that causes the dynamic spring piece to deform toward the side of the dynamic spring lead-out piece. When the dynamic spring assembly is installed downward into place, the dynamic spring piece elastically restores to the side away from the dynamic spring lead-out piece with the push card.

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

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

[0010] Furthermore, the base and / or the movable spring portion is provided with a guide limiter to perform upper limit positioning and sliding guidance on the push card.

[0011] Furthermore, the base includes a bottom plate and two surrounding walls arranged at the edge of the bottom plate and opposite to each other in the width direction of the dynamic spring lead-out piece, at least one of the two surrounding walls is installed with the guide limiter, and the bottom of the surrounding wall on which the guide limiter is installed is provided with a mounting groove running through its inner and outer side surfaces, the guide limiter is inserted into the mounting groove from the outside of the surrounding wall, and the guide limiter partially passes through the mounting groove and protrudes from the inner side surface of the surrounding wall.

[0012] Furthermore, the guide limiter includes a horizontal guide plate and a mounting block arranged at the bottom end of the guide plate, so that the guide limiter is T-shaped; the shape of the mounting groove is adapted to the shape of the guide limiter; the guide plate partially passes through the mounting groove and protrudes from the inner side surface of the surrounding wall.

[0013] Furthermore, the guide limit piece is interference fit with the mounting groove; the guide limit piece is provided with a limit protrusion at one end facing the outer side of the surrounding wall, and the inner wall surface of the mounting groove is provided with a limit step corresponding to the limit protrusion, and the limit protrusion cooperates with the limit step to limit the depth of the guide limit piece installed in the mounting groove.

[0014] Furthermore, the bottom plate is provided with a guide boss, the push card is placed on the guide boss, and the guide limiter cooperates with the guide boss up and down to form a guide slot of the push card.

[0015] Furthermore, a limiting groove is provided on a groove wall on one side of the locking groove away from the giving way groove, and a limiting protrusion is provided at the lower end of the movable spring corresponding to the limiting groove, and the limiting protrusion is snapped into the limiting groove.

[0016] Furthermore, the movable spring piece includes a plurality of sub-spring pieces, which are stacked together, and 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 to form a hook, and the hook constitutes the limiting protrusion; the clamping slot is through-through from top to bottom, and the limiting slot is a blind slot structure with an opening at the lower end.

[0017] Furthermore, the base includes a bottom plate and two surrounding walls arranged at the edge of the bottom plate and opposite to each other in the width direction of the dynamic spring lead-out piece. The upper end of the dynamic spring lead-out piece is provided with positioning blocks on both sides of its width direction, and the top of the inner side surfaces of the two surrounding walls are 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 bottom plate and two surrounding walls arranged at the edge of the bottom plate and opposite to each other in the width direction of the movable spring lead-out piece, and also includes an armature part, which is rotatably connected between the two surrounding walls by a rotating shaft; the armature part includes a driving body and an armature assembly arranged on the driving body, the armature assembly is I-shaped, and its four ends respectively extend out of the driving body, the driving body is rotatably connected between the two surrounding walls by a rotating shaft, and the bottom end of the driving body is inserted into the connecting groove set by the push card; it also includes a coil part installed on the base, the coil part includes two yokes opposite to each other in the upper and lower parts, the armature part is fitted between the two yokes, and the free ends of the two yokes are respectively inserted into the recesses on both sides of the armature part; arc-extinguishing permanent magnets are respectively installed at the positions corresponding to the outer side surfaces of the two surrounding walls and the movable spring part.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Since the movable spring part and the push card of the utility model form a movable spring assembly, the movable spring assembly is installed into the base from top to bottom, so that the utility model does not need to set an opening on the bottom plate of the base to install the push card, and also does not need to adopt a side-mounted installation method to install the push card. The push card can be installed from top to bottom into the base with a high frame structure. Therefore, the utility model does not need to add cover parts, which can reduce the risk of glue leakage. In addition, the deformation of the base parts is small, and the size and structure are stable, which can better ensure the stability of product performance parameters.

[0021] 2. When the movable spring assembly is installed, the push card is in a dislocated state that causes the movable spring piece to be deformed toward the side of the movable spring lead-out piece. When the movable spring assembly is installed downwardly into place, the movable spring piece brings the push card to elastically recover toward the side away from the movable spring lead-out piece. When the movable spring assembly is installed, the push card is pre-dislocated to form a space to avoid the arc-extinguishing magnetic steel mounting portion of the base. There is no need to increase the width of the base to achieve the installation and operation of the push card, and the static contacts of the normally closed relay can be avoided. Therefore, the utility model is suitable for relays of smaller sizes and is also conducive to the miniaturization design of the relay.

[0022] 3. When the push card is in the dislocated state, the protrusions on both sides of the push card respectively enter the first grooves of the two surrounding walls and move downward along the first grooves. When the dynamic spring assembly is installed downward, the push card can automatically maintain the dislocated state by utilizing the cooperation between the protrusions on both sides and the first grooves, thereby avoiding the need to continuously apply force to the push card to maintain the dislocated state, thereby making the installation of the dynamic spring assembly easier and more labor-saving.

[0023] 4. The bottom of the inner side surfaces of the two surrounding walls are respectively provided with a second groove, which can cooperate with the protruding portion of the push card to achieve a certain upper limit and movement guiding effect on the push card.

[0024] 5. The present invention further adopts a guide limiter to provide an upper limit and motion guide for the push card, which can provide a precise upper limit and motion guide for the push card, thereby ensuring smooth movement of the push card, reducing the degree of twisting during the movement of the push card, ensuring that the contact point between the push card and the movable spring remains basically unchanged, and the reaction force of the movable spring is consistent, thereby improving the consistency of the relay action time. At the same time, due to the good consistency of the pressure on the contacts, the electrical life reliability of the relay is higher.

[0025] 6. Because the surrounding wall is provided with a mounting slot extending through its inner and outer surfaces, the guide stopper is inserted into the mounting slot from the outer side of the surrounding wall. The guide stopper partially extends through the mounting slot and protrudes from the inner side of the surrounding wall. This makes the guide stopper of the present invention easy to install and reduces the internal space occupied by the base. In particular, the interference fit between the guide stopper and the mounting slot further enhances the stability of the guide stopper's position, thereby further improving the guide stopper's guiding effect on the push card.

[0026] 7. The guide and position-limiting member preferably includes the guide plate and the mounting block, which can satisfy the guiding and position-limiting functions of the guide and position-limiting member while improving the installation reliability of the guide and position-limiting member.

[0027] 8. A guide boss is further provided on the upper surface of the bottom plate, which can reduce the contact area between the push card and the upper surface of the bottom plate, thereby reducing the sliding friction of the push card and further improving the smoothness of the push card movement.

[0028] 9. The lower end of the dynamic spring is bent to form a hook, which cooperates with the limiting groove on the corresponding side of the card slot, so that the matching structure of the dynamic spring and the push card is relatively simple, and the limiting matching effect is better. The overall structural stability of the dynamic spring assembly composed of the dynamic spring part and the push card is better, which is convenient for transportation and avoids the loss of parts.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the electromagnetic relay of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the three-dimensional structure of the electromagnetic relay of the present utility model;

[0031] Figure 2 This is a schematic diagram of the three-dimensional structure of the dynamic spring part of the utility model;

[0032] Figure 3 It is a right side view of the movable spring portion of the utility model;

[0033] Figure 4 This is a schematic diagram of the three-dimensional structure of the push card of the utility model Figure 1 ;

[0034] Figure 5 This is a top view of the push card of the utility model;

[0035] Figure 6 This is a schematic diagram of the three-dimensional structure of the push card of the utility model Figure 2 ;

[0036] Figure 7 It is a cross-sectional view of the push card of the utility model;

[0037] Figure 8 It is a three-dimensional structural diagram of the connecting structure of the movable spring part and the push card of the utility model;

[0038] Figure 9 This is a cross-sectional view of the connection structure between the movable spring portion and the push card of the utility model;

[0039] Figure 10 This is a schematic diagram of the three-dimensional structure of the base of the utility model;

[0040] Figure 11 It is a cross-sectional view of the base of the utility model;

[0041] Figure 12 This is a schematic diagram of the three-dimensional structure of the guide and limiting member of the utility model;

[0042] Figure 13 This is a front view of the guide limiter of the utility model;

[0043] Figure 14 This is a top view of the guide limiter of the present utility model;

[0044] Figure 15 It is a side view of the guide limiter of the utility model;

[0045] Figure 16 This is a schematic diagram of the three-dimensional structure of the base and the guide limiter of the utility model in the assembled state;

[0046] Figure 17 This is a cross-sectional view of the base and the guide limiter of the utility model in the assembled state;

[0047] Figure 18 This is a schematic diagram of the assembly of the dynamic spring assembly of the utility model into the base Figure 1 (Section view);

[0048] Figure 19 This is a schematic diagram of the assembly of the dynamic spring assembly of the utility model into the base Figure 2 (Section view);

[0049] Figure 20This is a schematic diagram of the assembly of the dynamic spring assembly of the utility model into the base Figure 3 ;

[0050] Figure 21 yes Figure 20 A top view of

[0051] Figure 22 yes Figure 20 sectional view of

[0052] Figure 23 This is a schematic diagram of the assembly of the dynamic spring assembly of the utility model into the base Figure 4 (Section)

[0053] Figure 24 This is a schematic diagram of the assembly of the dynamic spring assembly of the utility model into the base Figure 5 (Section view);

[0054] Figure 25 It is a three-dimensional structural diagram of the movable spring assembly, the guide limiter and the base of the utility model in the assembled state;

[0055] Figure 26 yes Figure 25 sectional view of

[0056] Figure 27 This is a schematic diagram of the three-dimensional structure of the electromagnetic relay of the present invention (excluding the housing);

[0057] Figure 28 It is a cross-sectional view of the electromagnetic relay of the present utility model;

[0058] In the figure, 1. the movable spring part, 11. the movable spring lead-out piece, 111. the support platform, 112. the notch, 113. the positioning block, 12. the movable spring piece, 121. the sub-spring piece, 122. the U-shaped bend, 123. the hook, 13. the movable contact, 2. the push card, 21. the card slot, 211. the limit slot, 22. the clearance slot, 221. the protrusion, 23. the connecting slot, 24. the protrusion, 3. the base, 31. the bottom plate, 311. the guide boss, 312. the movable spring slot, 32. the surrounding wall, 321. the mounting slot, 322. the positioning slot , 323, accommodating groove, 324, first groove, 325, second groove, 33, guide slide, 4, armature part, 41, driving body, 42, armature, 43, permanent magnet, 5, rotating shaft, 6, coil part, 61, coil frame, 62, enameled wire, 63, iron core, 64, yoke, 7, static spring part, 71, static spring sheet, 72, static contact, 8, guide limiter, 81, guide plate, 82, mounting block, 811 / 821, limiting protrusion, 9, outer shell, 10, arc-extinguishing permanent magnet, 20, magnetic isolation sheet. DETAILED DESCRIPTION

[0059] In the description of this utility model, the use of terms such as "upper," "lower," "left," and "right" to indicate directions or positional relationships is based on the directions or positional relationships shown in the accompanying drawings and is intended solely to facilitate the description of this utility model. They are not intended to indicate or imply that the device referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limiting the scope of protection of this utility model. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0060] In addition, in the description of the present invention, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. 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 the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] See Figure 1-Figure 28 As shown, an electromagnetic relay of the present invention includes a base 3, a dynamic spring portion 1 and a push card 2. The base 3 specifically includes a bottom plate 31 and two surrounding walls 32 protruding upward from the edges of the bottom plate 31. The two surrounding walls 32 are arranged opposite to each other in the width direction of the dynamic spring lead-out piece 11 described below. The dynamic spring portion 1 includes an elastically deformable dynamic spring piece 12, a dynamic spring lead-out piece 11 and a dynamic contact 13. The upper end of the dynamic spring piece 12 is fixedly connected to the upper end of the dynamic spring lead-out piece 11 by riveting. The dynamic contact 13 is arranged on the dynamic spring piece 12 and faces away from the dynamic spring lead-out piece 11. Specifically, the dynamic contact 13 is riveted roughly in the middle position of the dynamic spring piece 12. The dynamic spring piece 12 includes a plurality of sub-spring pieces 121. The plurality of sub-spring pieces 121 are stacked together, and the upper end of each sub-spring piece 121 is respectively provided with a U-shaped bend 122 protruding toward the side away from the dynamic spring lead-out piece 11, as shown in FIG. Figure 2 、 Figure 3 shown.

[0062] like Figure 4-Figure 7As shown, the push card 2 is provided with, from left to right, a latching slot 21, a clearance slot 22, and a connecting slot 23. The clearance slot 22 is located between the latching slot 21 and the connecting slot 23. The latching slot 21, the clearance slot 22, and the connecting slot 23 are each through-hole structures that are vertically continuous and enclosed on all sides. The lower end of the movable spring 12 is engaged with the latching slot 21, limiting the position of the movable spring 12 on 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 separating from the movable spring lead-out piece 11. Therefore, when assembled, the movable spring portion 1 and the push card 2 form a stable movable spring assembly, facilitating transportation and / or assembly of the movable spring assembly.

[0063] In this embodiment, the support and limiting structure comprises a support platform 111 provided on the dynamic spring lead-out piece 11 and a protrusion 221 provided on the wall of the clearance slot 22, with the protrusion 221 resting on the support platform 111. This makes the support and limiting structure relatively simple, and the present invention eliminates the need for additional components, helping to reduce costs and simplify the assembly process. In other embodiments, the support and limiting structure is a limiting member that fits over the dynamic spring lead-out piece and is located below the push card, thereby supporting the push card.

[0064] There are two support platforms 111, located on either side of the dynamic spring lead-out piece 11 in the width direction. There are also two protrusions 221, each located on the side of the clearance slot 22 away from the latch slot 21. The two protrusions 221 mate with the two support platforms 111. Specifically, the dynamic spring lead-out piece 11 has notches 112 on either side of 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 that accommodate the push card 2, which can move within the notches 112.

[0065] In this embodiment, after the movable spring 12 is connected to the movable spring lead-out piece 11, the movable spring 12 tilts toward the side away from the movable spring lead-out piece 11. Before the movable spring portion 1 connects to the push card 2, the horizontal distance A between the lower end of the movable spring 12 and the opposite 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 engaged with the slot 21 while the movable spring 12 is deformed toward the movable spring lead-out piece 11. The movable spring 12 elastically recovers toward the side away from the movable spring lead-out piece 11, thereby driving the push card 2 to move, causing the protrusion 221 to move above the support platform 111, thereby achieving the support function of the support platform 111 for the protrusion 221. Therefore, the utility model realizes a special cooperation mode between the dynamic spring piece 12 and the push card 2, ensuring that the lower end of the dynamic 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 dynamic spring piece 12 itself to realize that the dynamic spring lead-out piece 11 provides stable support for the push card 2, so that the structure of the push card 2 and the dynamic spring part 1 after being assembled into a dynamic spring assembly is more stable and convenient for transportation.

[0066] In this embodiment, a retaining groove 211 is provided on the side of the retaining groove 21 facing away from the clearance groove 22. A retaining protrusion is provided at the lower end of the movable spring 12, corresponding to the retaining groove 211. This retaining protrusion engages within the retaining groove 211. Specifically, the lower end of the movable spring 12's multiple sub-springs, the one 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. This hook 123 constitutes the retaining protrusion. The retaining groove 211 is a blind groove structure with an opening at the lower end, allowing the hook 123 to better enter the retaining groove 211.

[0067] The dynamic spring assembly is installed from top to bottom into the base 3 and is positioned between the two surrounding walls 32 of the base 3. The lower end of the dynamic spring lead-out piece 11 is inserted into the dynamic spring slot 312 provided on the bottom plate 31. Specifically, when the dynamic spring assembly is installed, the push card 2 is in a dislocated state such that the dynamic spring piece 12 is deformed toward the dynamic spring lead-out piece 11. When the dynamic spring assembly is lowered into place, the dynamic spring piece 12 elastically recovers, carrying the push card 2 with it, toward the side away from the dynamic spring lead-out piece 11.

[0068] In this embodiment, the inner side surfaces of the two surrounding walls 32 of the base 3 are respectively provided with first grooves 324 extending vertically. The first grooves 324 are respectively provided with openings at the upper and lower ends. The first grooves 324 of the two surrounding walls 32 are arranged opposite each other. The push card 2 is respectively provided with protrusions 24 on both sides of the width direction of the dynamic spring lead-out piece 11. 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 surrounding walls 32 and move downward along the grooves. After the dynamic spring assembly is lowered into place, the protrusions 24 on both sides of the push card 2 exit the corresponding first grooves 324. In this way, during the downward installation of the dynamic spring assembly, the push card 2 can automatically maintain the misaligned state by the cooperation between its protrusions 24 and the grooves, thereby avoiding the need for continuous force on the push card 2 to maintain the misaligned state, thereby making installation of the dynamic spring assembly easier and more labor-saving. The bottom of the inner side surfaces of the two surrounding walls 32 are each provided with a second groove 325 extending in the thickness direction of the dynamic spring lead-out piece 11. The lower end of the first groove 324 is connected to the second groove 325. When the dynamic spring assembly is installed in the base 3, the lower end of the dynamic spring lead-out piece 11 is aligned with the dynamic spring slot 312. The push card 2 moves in a direction that deforms the dynamic spring piece 12 toward the dynamic spring lead-out piece 11, so that the protrusion 24 is aligned with the first groove 324. When the dynamic spring assembly moves downward to its full position, the protrusion 24 enters the second groove 325 from the first groove 324, and the dynamic spring piece 12 elastically recovers with the push card 2 away from the dynamic spring lead-out piece 11.

[0069] The base 3 and / or the movable spring portion 1 are provided with guide stoppers to limit the position and guide the movement of the push card 2. In this embodiment, the base 3 is provided with a guide stopper 8, but this is not limiting. In other embodiments, the movable spring portion is provided with a guide stopper, or both the movable spring portion and the base are provided with guide stoppers. When the guide stopper is provided on the movable spring portion, the guide stopper can be connected to or integrally formed with the movable spring leaf or the movable spring lead-out leaf of the movable spring portion. In this embodiment, the guide stopper 8 is mounted on at least one of the two surrounding walls 32 of the base 3. Specifically, the guide stopper 8 is mounted on the bottom of each of the two surrounding walls 32 of the base 3. The second groove 325 is connected to the mounting slot 321.

[0070] As a preferred embodiment, the bottom of the two surrounding walls 32 of the base 3 are respectively provided with installation grooves 321 that pass through the inner and outer wall surfaces thereof. The guide limit member 8 is inserted into the installation groove 321 from the outer side of the surrounding wall 32, and the guide limit member 8 partially passes through the installation groove 321 and protrudes from the inner side surface of the surrounding wall 32 to provide an upper limit and movement guide for the push card 2.

[0071] In this embodiment, if Figure 12-15As shown, the guide limiter 8 includes a horizontal guide plate 81 and a mounting block 82 provided at the bottom end of the guide plate 81, so that the guide limiter 8 is T-shaped in the front view and rear view. The shape of the mounting groove 321 on each surrounding wall 32 is adapted to the shape of the guide limiter 8. In this way, while satisfying the guiding and limiting functions of the guide limiter 8, it is also beneficial to improve the installation reliability of the guide limiter 8. In particular, the guide limiter 8 and the mounting groove 321 are in an interference fit, which can further improve the fixation and reliability of the position of the guide limiter 8 after installation. After the guide limiter 8 is installed in the mounting groove 321, the guide plate 81 partially passes through the mounting groove 321 and protrudes from the inner side surface of the surrounding wall 32, as shown in FIG. Figure 17 As shown, the upper limit and movement guidance of the push card 2 are achieved.

[0072] The guide limiter 8 is provided with a limit convex portion at one end facing the outer side of the surrounding wall 32, and a limit step is provided on the inner wall surface of the installation groove 321 corresponding to the limit convex portion. The limit convex portion cooperates with the limit step to limit the depth of the guide limiter 8 inserted into the installation groove 321. Specifically, Figure 12 、 Figure 14 、 Figure 15 As shown, the guide plate 81 is provided with limiting protrusions 811 on the left and right sides of one end facing the outer side of the surrounding wall 32, and the mounting block 82 is provided with a limiting protrusion 821 on the bottom of one end facing the outer side of the surrounding wall 32. Each limiting protrusion cooperates with the corresponding limiting step to limit the depth of the guide limiting member 8 inserted into the mounting groove 321, thereby further improving the installation reliability of the guide limiting member 8.

[0073] 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, the guide boss 311 is provided at the position where the upper surface of the base plate 31 meets the two surrounding walls 32. The guide boss 311 is long and extends along the movement direction of the push card 2. The guide limiter 8 on the same side cooperates with the guide boss 311 to form a guide slot 33 for the push card 2, as shown in FIG. Figure 17 shown.

[0074] In this embodiment, positioning blocks 113 are provided on both sides of the upper end of the dynamic spring lead-out piece 11 in its width direction, and positioning grooves 322 are provided on the top of the inner side surfaces of the two surrounding walls 32 of the base corresponding to the positioning blocks 113. The upper ends of the positioning grooves 322 are provided with openings. When the dynamic spring assembly is installed from top to bottom, each positioning block 113 is respectively snapped into the corresponding positioning groove 322 from top to bottom.

[0075] The present invention also includes an armature portion 4, which is rotatably connected between the two surrounding walls 32 of the base 3 via a rotating shaft 5. The bottom of the armature portion 4 is inserted into the corresponding connection slot 23 of the push clamp 2. The armature portion 4 specifically comprises an insulated driving body 41 and an armature assembly disposed within the driving body 41. The armature assembly is I-shaped, with its four ends extending outside the driving body 41. The driving body 41 is rotatably connected to the surrounding frame 31 of the base 3 via a rotating shaft 5, and the bottom end of the driving body 41 is connected to the push clamp 2. The armature assembly specifically comprises two parallel armatures 42 and a permanent magnet 43 clamped between the two armatures 41. The present invention also includes a coil portion 6, which comprises a coil frame 61, an enameled wire 62 wound around the coil frame 61, two yokes 64, and an iron core 63. The iron core 63 is inserted into a through hole of the coil frame. The two yokes 64 are L-shaped, with one side of each yoke 64 riveted to the opposite 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 part 4, that is, the other side of one yoke 64 is fitted between the upper ends of the two armature pieces 42, and the other side of the other yoke 64 is fitted between the lower ends of the two armature pieces 42. Figure 28 Therefore, the present invention constitutes a magnetic latching relay, but is not limited thereto.

[0076] The present invention also includes a static spring portion 7, which comprises a static spring piece 71 inserted into the base 3 and a static contact 72 disposed on the static spring piece 71. The static contact 72 engages with the dynamic contact 13 on the dynamic spring portion 1. When the present invention is closed, the static spring portion 7 pushes against the dynamic spring piece 12, causing it to deform toward the dynamic spring lead-out piece 11. Therefore, the size of the aforementioned protrusion 221 is designed to be small, so that after the dynamic spring portion 1 is assembled with the push card 2, the dynamic spring lead-out piece 11 substantially contacts the side of the clearance slot 22 where the protrusion 221 is located. In other embodiments, by increasing the size of the protrusion 221 in the sliding direction of the push card 2, after the dynamic spring portion 1 is assembled with the push card 2, a suitable spacing can be created between the dynamic spring lead-out piece 11 and the side of the clearance slot 22 where the protrusion 221 is located. This allows for the push card 2 to drive the dynamic spring piece 12 away from the dynamic spring lead-out piece 11.

[0077] In this embodiment, arc-extinguishing permanent magnets 10 are installed on the outer side surfaces of the two surrounding walls 32 of the base at positions corresponding to the movable spring portion, which can improve the arc-extinguishing function of the present invention. Specifically, the outer side surfaces of the two surrounding walls 32 are respectively provided with accommodating grooves 323, into which the arc-extinguishing permanent magnets 10 are installed, and are covered and magnetically isolated from the outside by a magnetic isolation sheet 20. The present invention also includes a shell 9, the bottom end of which is connected to the base 3 and contains the static spring portion 7, the movable spring portion 1, the push card 2, the armature portion 4, the coil portion 6, etc. in its shell cavity. The present invention also includes an auxiliary movable spring piece 30 and an auxiliary static spring piece 40 inserted into the base 1. The auxiliary movable spring piece 30 and the auxiliary static spring piece 40 cooperate with each other, and the auxiliary movable spring piece 30 is driven by the armature portion 4. The closed state of the auxiliary movable spring piece 30 and the auxiliary static spring piece 40 is the same as the closed state of the movable spring portion 1 and the static spring portion 7.

[0078] The assembly process of the dynamic spring assembly of the electromagnetic relay of the utility model is as follows:

[0079] Move the dynamic spring assembly to the top of the base 3 and align the lower end of the dynamic spring lead-out piece 11 with the dynamic spring slot 312 of the base. Figure 18 As shown;

[0080] Along the direction of deforming the movable spring piece 12 toward one side of the movable spring lead-out piece 11 (i.e. Figure 19 Push the push card 2 a certain distance, as shown in the right direction Figure 19 As shown, the protrusions 24 on both sides of the push card 2 are aligned with the upper openings of the first grooves 324 of the two surrounding walls 32 respectively;

[0081] 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, respectively. Figure 20-22 As 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 surrounding walls 32, the two form a limit. Therefore, releasing the push card 2 at this time will not cause the push card 2 to return to the left.

[0082] Continue to move the dynamic spring assembly downward until it moves downward to its proper position. At this time, the protrusion 24 enters the second groove 325 from the first groove 324. The lower end of the dynamic spring lead-out piece 11 is inserted into the dynamic spring slot 312 of the base. The push card 2 is located on the guide boss 311 of the bottom plate 31. The dynamic spring piece 12 brings the push card 2 to elastically recover to the side away from the dynamic spring lead-out piece 11. Figure 23 、 Figure 24 As shown, Figure 23 This shows the state where the card 2 is pushed to the bottom position of the first groove 324;

[0083] The two guide limiters 8 are respectively inserted into the mounting grooves 321 at the bottom of the surrounding wall from the outside of the surrounding wall 32, and the guide plates 81 of the guide limiters 8 partially pass through the mounting grooves 321 and protrude from the inner side of the surrounding wall 32 to achieve the upper limit and movement guidance of the push card 2. Figure 25 、 Figure 26 shown.

[0084] Therefore, the present invention allows the push card 2 to be installed from top to bottom into the base 3 with a frame structure, and eliminates the need to set an opening on the bottom plate 31 of the base 3 to install the push card 2. It also eliminates the need to install the push card 2 in a side-mounted manner, thereby eliminating the need for additional cover parts, reducing the risk of glue leakage, and minimizing deformation of the base parts. The size and structure are stable, which can better ensure the stability of product performance parameters. In addition, the present invention uses a guide limiter 8 to provide an upper limit and motion guide for the push card 2. The position and size of the guide limiter 8 are fixed, which can ensure smooth movement of the push card 2, reduce the degree of twisting during the operation of the push card 2, ensure that the contact point between the push card 2 and the dynamic spring 12 remains basically unchanged, and the reaction force of the dynamic spring 12 is consistent, thereby improving the consistency of the relay operation time. At the same time, due to the consistent pressure on the contacts, the electrical life and reliability of the relay are higher.

[0085] In particular, when the movable spring assembly is installed, the push card 2 is pre-installed in an offset manner to create a space for avoidance, making the present invention suitable for smaller relays and also 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 downward without being offset, it will cause interference between the push card 2 and the static contact 72 of the static spring portion 7. Therefore, the present invention installs the push card 2 in an offset manner to avoid the static contact 72 of the static spring portion 7. On the other hand, the two surrounding walls 32 of the base 3 are usually equipped with arc-extinguishing permanent magnets 10. The width between the two surrounding walls 32 is relatively small. The area of ​​the two surrounding walls 32 equipped with the arc-extinguishing permanent magnets 10 is not suitable for slotting to avoid the push card 2. Since the movable spring lead-out piece 11 needs to be inserted into the push card 2, the width of the push card 2 at the position corresponding to the movable spring lead-out piece 11 is very large, which is larger than the width of the base 3 at the position where the arc-extinguishing permanent magnet 10 is installed. Therefore, if the push card 2 is installed directly downward, it will not be able to be installed in the base 3. Therefore, the present invention adopts a staggered installation method for the push card 2, so that during the downward installation process of the push card 2, its wider portion can avoid the portion where the arc-extinguishing permanent magnet 10 is installed on the two surrounding walls 32. Only after the push card 2 is fully installed, the wider portion of the push card 2 (i.e., the protrusion 24) will avoid it through the second groove, allowing the push card 2 to slide normally. Therefore, the present invention allows the push card 2 to enter the base 3 in a staggered manner, and the follower spring 12 is reset after reaching the bottom of the base 3. This can solve the problem that small spaces are not convenient for directly downward installation of the push card 2. Therefore, the present invention is suitable for relays with smaller length and width dimensions, and is conducive to the miniaturization of relay design.

[0086] The electromagnetic relay of the present invention is the same as that of the prior art, and the parts not involved are the same as those of the prior art or can be implemented by using the prior art.

[0087] The above embodiments are only used to further illustrate an electromagnetic relay of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the technical solution of the present invention.

Claims

1. An electromagnetic relay comprising a base, a movable spring portion, and a push card, wherein the movable spring portion comprises an elastically deformable movable spring piece, a movable spring lead piece, and a movable contact, wherein the upper end of the movable spring piece is fixedly connected to the upper end of the movable spring lead piece, and the movable contact is disposed on the movable spring piece; characterized in that: The lower end of the dynamic spring piece is clamped in the clamping slot provided on the push card, and the lower end of the dynamic spring lead-out piece passes through the clearance slot provided on the push card, so that the dynamic spring part and the push card form a dynamic spring assembly. The dynamic spring assembly is installed into the base from top to bottom, and the lower end of the dynamic spring lead-out piece is inserted into the dynamic spring slot provided on the base.

2. The electromagnetic relay according to claim 1, wherein: When the dynamic spring assembly is installed, the push card is in a dislocated state that causes the dynamic spring piece to be deformed toward the side of the dynamic spring lead-out piece. When the dynamic spring assembly is installed downward into place, the dynamic spring piece elastically restores to the side away from the dynamic spring lead-out piece with the push card.

3. The electromagnetic relay according to claim 2, wherein: The base includes a bottom plate and two surrounding walls arranged at the edge of the bottom plate and opposite to each other in the width direction of the dynamic spring lead-out piece. The inner side surfaces of the two surrounding walls are respectively provided with first grooves extending up and down, and the upper and lower ends of the first grooves are respectively provided with openings. The push card is respectively provided with protrusions on both sides in the width direction of the dynamic spring lead-out piece. When the push card is in the dislocated state, the protrusions on both sides of the push card respectively enter the first grooves of the two surrounding walls and move downward along the first grooves.

4. The electromagnetic relay according to claim 3, wherein: The bottom of the inner side surfaces of the two surrounding walls are respectively provided with a second groove extending along the thickness direction of the dynamic spring lead-out piece, and the lower end of the first groove is connected to the second groove; when the dynamic spring assembly is installed downward into place, the protrusion enters the second groove from the first groove.

5. The electromagnetic relay according to claim 1, wherein: The base and / or the movable spring portion are provided with a guide limiter to perform upper limit positioning and sliding guidance on the push card.

6. The electromagnetic relay according to claim 5, characterized in that: The base includes a bottom plate and two surrounding walls arranged at the edge of the bottom plate and opposite to each other in the width direction of the dynamic spring lead-out piece. At least one of the two surrounding walls is installed with the guide limiter, and the bottom of the surrounding wall on which the guide limiter is installed is provided with a mounting groove running through its inner and outer side surfaces. The guide limiter is inserted into the mounting groove from the outer side of the surrounding wall, and the guide limiter partially passes through the mounting groove and protrudes from the inner side surface of the surrounding wall.

7. The electromagnetic relay according to claim 6, wherein: The guide limiter includes a horizontal guide plate and a mounting block arranged at the bottom end of the guide plate, so that the guide limiter is T-shaped; the shape of the mounting groove is adapted to the shape of the guide limiter; the guide plate partially passes through the mounting groove and protrudes from the inner side surface of the surrounding wall.

8. The electromagnetic relay according to claim 6 or 7, characterized in that: The guide limit piece is interference fit with the mounting groove; the guide limit piece is provided with a limit protrusion at one end facing the outer side of the surrounding wall, and the inner wall surface of the mounting groove is provided with a limit step corresponding to the limit protrusion, and the limit protrusion cooperates with the limit step to limit the depth of the guide limit piece installed in the mounting groove.

9. The electromagnetic relay according to claim 6, wherein: The bottom plate is provided with a guide boss, the push card is placed on the guide boss, and the guide limiter cooperates with the guide boss up and down to form a guide slot of the push card.

10. The electromagnetic relay according to claim 1, wherein: A limiting groove is provided on a groove wall on one side of the clamping groove away from the giving way 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.

11. The electromagnetic relay according to claim 10, wherein: The movable spring piece includes a plurality of sub-spring pieces, which are stacked together. 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 to form a hook, and the hook constitutes the limiting protrusion; the clamping slot is through-through from top to bottom, and the limiting slot is a blind slot structure with an opening at the lower end.

12. The electromagnetic relay according to claim 1, wherein: The base includes a bottom plate and two surrounding walls arranged at the edge of the bottom plate and opposite to each other in the width direction of the dynamic spring lead-out piece. The upper end of the dynamic spring lead-out piece is provided with positioning blocks on both sides of its width direction. The top of the inner side surfaces of the two surrounding walls are 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.

13. The electromagnetic relay according to claim 1, wherein: The base includes a bottom plate and two surrounding walls arranged at the edge of the bottom plate and opposite to each other in the width direction of the movable spring lead-out piece, and also includes an armature part, which is rotatably connected between the two surrounding walls by a rotating shaft; the armature part includes a driving body and an armature assembly arranged on the driving body, the armature assembly is I-shaped, and its four ends respectively extend out of the driving body, the driving body is rotatably connected between the two surrounding walls by a rotating shaft, and the bottom end of the driving body is inserted into the connecting groove set by the push card; it also includes a coil part installed on the base, the coil part includes two yokes opposite to each other in the upper and lower parts, the armature part is fitted between the two yokes, and the free ends of the two yokes are respectively inserted into the recesses on both sides of the armature part; arc-extinguishing permanent magnets are respectively installed at the positions corresponding to the outer sides of the two surrounding walls and the movable spring part.

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