Movable spring assembly and electromagnetic relay

Abstract

The utility model discloses a movable spring assembly and an electromagnetic relay, the movable spring assembly comprises a movable spring support and at least one movable spring sheet, the movable spring sheet is movably arranged on the movable spring support, one side of the movable spring sheet in the moving direction is provided with a movable contact, and an elastic member is arranged between the other side of the movable spring sheet in the moving direction and the movable spring support; a plurality of groups of guide limiting structures are arranged between the movable contact spring and the movable contact spring support, are made of non-plastic materials, guide the movement of the movable contact spring relative to the movable contact spring support, and limit the movable contact spring to twist around the axis in the movement direction of the movable contact spring. According to the utility model, the movement of the movable reed relative to the movable reed support can be guided, and the movable reed can be prevented from twisting around the axis in the movement direction of the movable reed, so that the contact stability of contacts can be ensured, and the electrical durability can be improved. In addition, plastic scraps can be effectively prevented from being generated, so that poor contact or other abnormal problems caused by the fact that the plastic scraps are attached to the surfaces of the contacts are reduced.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to a moving spring assembly and an electromagnetic relay. Background Technology

[0002] An electromagnetic relay is an electronic control device widely used in automatic control circuits. It controls a larger current with a smaller current, acting as an "automatic switch" to achieve functions such as automatic adjustment, safety protection, and circuit switching in the circuit.

[0003] In certain power supply applications, increasing the contact gap is necessary to ensure electrical insulation between the input and output terminals. Existing technology typically employs a bridge contact structure, where the input and output contact gaps are the sum of the gaps of the two sets of contacts. Simultaneously, relay magnetic circuits often utilize a direct-acting iron core structure, with a moving spring resting on the moving part to achieve actuation. To ensure synchronous connection and disconnection of the two sets of contacts, the moving spring needs to be limited.

[0004] Another existing technical solution is to guide and limit the moving spring by using the opposite sides of the moving spring bracket where the moving spring is located. However, the moving spring bracket is usually made of plastic, and the friction between the moving spring and the plastic bracket will generate plastic shavings. These plastic shavings can easily adhere to the contact surface, leading to increased contact resistance or contact failure, which in turn causes abnormal temperature rise. At the same time, due to the friction between the moving spring and the plastic, the plastic wears a lot, which weakens the plastic's guiding effect, resulting in decreased contact reliability and poor electrical durability consistency. Utility Model Content

[0005] This utility model addresses the technical problems existing in the prior art by providing a moving spring assembly and an electromagnetic relay. Through structural improvements, it can guide the movement of the moving spring relative to the moving spring support and prevent the moving spring from twisting.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a moving spring assembly, including a moving spring bracket and at least one moving spring piece, the moving spring piece being movably disposed on the moving spring bracket, and the moving spring piece having a moving contact on one side of the moving direction, and an elastic element being disposed between the moving spring piece and the moving spring bracket on the other side of the moving direction; multiple sets of guide limiting structures are provided between the moving spring piece and the moving spring bracket, each set of guide limiting structures being made of non-plastic material, the multiple sets of guide limiting structures guiding the movement of the moving spring piece relative to the moving spring bracket, and restricting the moving spring piece from twisting around an axis located in its moving direction.

[0007] In a preferred embodiment, the multiple sets of guide and limiting structures each include a first guide member and a second guide member that are slidably engaged together along the moving direction of the movable spring. The first guide member and / or the second guide member are elongated and extend along the moving direction of the movable spring. The first guide member is disposed on the movable spring support, and the second guide member is disposed on the movable spring.

[0008] In a preferred embodiment, one of the first guide member and the second guide member is a recessed structure, the recessed structure including one of a guide hole, a guide notch and an elongated guide groove, and the other of the first guide member and the second guide member is a guide protrusion or a guide rod.

[0009] In a preferred embodiment, the first guide member is fixedly connected to the movable spring bracket, and the fixed connection method includes one or more of the following: screw or bolt connection, insert injection molding, plugging, bonding, and snap-fit ​​connection; the second guide member is located at the edge of the movable spring, and the second guide member is integrally formed with the movable spring.

[0010] In a preferred embodiment, the guide limiting structure is provided in two sets, and the second guide members of the two sets of guide limiting structures are respectively provided at both ends of the width direction of the movable spring, and the movable contact is provided at both ends of the length direction of the movable spring, and the moving direction of the movable spring is the thickness direction of the movable spring.

[0011] In a preferred embodiment, the movable spring support is formed with a frame-shaped portion having a first side and a second side disposed opposite to each other in the moving direction of the movable spring, and a third side and a fourth side disposed opposite to each other between the first side and the second side; the movable spring is disposed within the frame-shaped portion, at least one side of the frame-shaped portion is provided with the first guide member, and the elastic member is disposed between the second side and the movable spring.

[0012] In a preferred embodiment, a first guide member is provided on the first side of the frame-shaped portion; the first guide member is elongated.

[0013] In a preferred embodiment, the third side and the fourth side are respectively disposed adjacent to a first guide member, and a reinforcing portion is provided between the third side and the fourth side and the adjacent first guide member, the reinforcing portion limiting the first guide member on one side of the moving spring in the direction of movement; the moving spring bracket is provided with an extended protruding edge located outside the first side, the extended protruding edge limiting the first guide member on the other side of the moving spring in the direction of movement.

[0014] In a preferred embodiment, the elastic element is a contact spring, and the two ends of the contact spring are respectively fitted onto the first limiting protrusion of the moving spring and the second limiting protrusion of the moving spring bracket.

[0015] This utility model also provides an electromagnetic relay, including a stationary spring assembly and a magnetic circuit part, and further including a moving spring assembly as described above. The moving spring bracket is fixed relative to the moving iron core of the magnetic circuit part. The moving iron core drives the moving spring assembly to move along the moving direction of the moving spring, so that the moving contact on the moving spring assembly and the stationary contact on the stationary spring assembly are closed or opened.

[0016] In a preferred embodiment, the system further includes a base. The stationary spring assembly includes a plurality of stationary springs and stationary contacts disposed on each stationary spring, with each stationary contact corresponding to a moving contact. The plurality of stationary springs are respectively disposed on the base and located between the moving spring assembly and the magnetic circuit portion. The yoke assemblies of the moving spring assembly and the magnetic circuit portion are located on opposite sides of the base. The moving iron core is fixedly connected to the moving spring support. The base is provided with a clearance through hole corresponding to the moving iron core.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Because this invention incorporates multiple sets of guide and limiting structures between the moving spring and the moving spring support, it can guide the movement of the moving spring relative to the moving spring support and restrict the torsion of the moving spring around its axis in the direction of movement. This ensures the stability of the contact and improves electrical durability. Furthermore, the guide and limiting structures are made of non-plastic material, effectively preventing the generation of plastic debris and reducing contact problems or other abnormalities caused by plastic debris adhering to the contact surface. Moreover, the non-plastic material of the guide and limiting structures provides high hardness and strong wear resistance, which helps ensure guiding accuracy, improves the reliability of contact, and further enhances electrical durability.

[0019] 2. The first guide member is located on the moving spring bracket, and the second guide member is located on the moving spring. Only after the contacts make contact will the first guide member and the second guide member have sliding friction. Therefore, the sliding friction distance between the first guide member and the second guide member is short, which can minimize the generation of metal chips and thus further improve the electrical reliability and mechanical durability of the relay.

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the spring assembly and electromagnetic relay of the present invention are not limited to the embodiments. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the moving spring assembly (including the moving iron core) of this utility model. Figure 1 ;

[0022] Figure 2 This is a three-dimensional structural diagram of the moving spring assembly (including the moving iron core) of this utility model. Figure 2;

[0023] Figure 3 This is a three-dimensional structural diagram of the moving spring bracket (including the moving iron core) of this utility model;

[0024] Figure 4 This is a three-dimensional structural schematic diagram of the movable spring of this utility model;

[0025] Figure 5 This is a schematic diagram (partial cross-section) of the structure of the movable spring and guide rod in the mating state of this utility model;

[0026] Figure 6 This is a three-dimensional structural diagram (including the moving iron core) of another moving spring bracket of this utility model;

[0027] Figure 7 This is a front view (including the moving iron core) of another type of moving spring bracket of this utility model;

[0028] Figure 8 This is a cross-sectional view of another type of moving spring bracket of this utility model;

[0029] Figure 9 This is an exploded view of the electromagnetic relay of this utility model;

[0030] Figure 10 This is a three-dimensional structural diagram of the electromagnetic relay of this utility model;

[0031] Figure 11 This is a cross-sectional view of the electromagnetic relay of this utility model;

[0032] Figure 12 This is a three-dimensional structural schematic diagram of the yoke plate of this utility model;

[0033] Figure 13 This is a cross-sectional view of the yoke plate of this utility model;

[0034] Figure 14 This is a three-dimensional structural diagram of the base of this utility model;

[0035] Figure 15 This is a three-dimensional structural diagram of the coil frame of this utility model;

[0036] Figure 16 This is a cross-sectional view of the yoke plate, coil frame, and base of this utility model in an assembled state;

[0037] In the diagram, 1. Moving spring bracket; 11. First side; 12. Second side; 13. Third side; 14. Fourth side; 15. Second limiting protrusion; 16. Reinforcing part; 17. Extending protrusion; 2. Moving spring; 21. Guide notch; 22. Extending protrusion; 23. Riveting hole; 3. Moving contact; 4. Contact spring; 5. Guide rod; 6. Magnetic circuit part; 61. Coil frame; 611. Second positioning groove; 62. Coil; 63. 64. Moving iron core; 65. Stationary iron core; 66. First reaction spring; 67. Second reaction spring; 68. Push rod; 69. Yoke frame; 60. Yoke plate; 61. Clearance through hole; 62. First positioning groove; 63. Second positioning protrusion; 64. Flanged edge; 7. Base; 71. Clearance through hole; 72. First positioning protrusion; 8. Wiring terminal; 9. Stationary spring; 91. Stationary contact; 10. Top cover; 20. Bottom cover. Detailed Implementation

[0038] In this utility model, the terms "first," "second," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "inner," "outer," and "top / bottom" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, and is solely for the convenience of describing this utility model, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this utility model. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] Furthermore, in the description of this utility model, unless otherwise stated, "multiple groups / units" refers to two groups / units 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 existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0040] Please see Figures 1-5As shown, this utility model discloses a moving spring assembly for a direct-acting relay, comprising an insulated moving spring support 1 and at least one moving spring 2. The moving spring 2 is movably disposed on the moving spring support 1, and the moving spring 2 has a moving contact 3 on one side of the moving direction. An elastic element is provided between the moving spring 2 and the moving spring support 1 on the other side of the moving direction to achieve contact overtravel. Multiple sets of guide and limiting structures are provided between the moving spring 2 and the moving spring support 1. Each set of guide and limiting structures is made of non-plastic material. The multiple sets of guide and limiting structures guide the movement of the moving spring 2 relative to the moving spring support 1 and restrict the moving spring 2 from twisting around the axis located in its moving direction, thereby ensuring the stability of contact and improving electrical durability.

[0041] The movable spring 2 has three dimensions: length, width, and height. Movable contacts 3 are provided at both ends along the length of the movable spring 2 to form a movable contact bridge structure. The moving direction of the movable spring 2 is along its thickness. Each movable contact 3 on the movable spring 2 has a riveting hole, allowing the movable contacts 3 to be fixed to the movable spring 2 by riveting. However, riveting can also be replaced by welding or other fixing methods, which are equivalent substitutions.

[0042] Each set of guide and limiting structures includes a first guide member and a second guide member that are slidably engaged together along the moving direction of the movable spring 2. The first guide member and / or the second guide member are elongated and extend along the moving direction of the movable spring 2. The first guide member is located on the movable spring support 1, and the second guide member is located on the movable spring 2. In other embodiments, each set of guide and limiting structures includes a guide member that is adapted to slide together with the surface of the movable spring 2 along the moving direction of the movable spring 2.

[0043] One of the first guide member and the second guide member is a recessed structure, which includes one of the following: a guide hole, a guide groove, a guide notch, and a long strip guide groove. The other of the first guide member and the second guide member is a guide protrusion or a guide rod.

[0044] The first guide member is fixedly connected to the movable spring bracket 1, and the fixed connection method between the first guide member and the movable spring bracket 1 includes one or more of the following: screw or bolt connection, insert injection molding, insertion, bonding, and snap-fit ​​connection, preferably insert injection molding. The second guide member is located at the edge of the movable spring 2, and the second guide member is integrally formed with the movable spring 2. In this embodiment, the first guide member is a guide rod 5, and the guide rod 5 can be made of metal, ceramic, stone, etc., preferably metal, such as stainless steel. The second guide member is a guide notch 21. In other embodiments, the first guide member is an elongated guide groove, and the second guide member is a guide protrusion; or, the first guide member is a guide rod, and the second guide member is a guide hole; or, the first guide member is a guide protrusion, and the second guide notch, etc.

[0045] In this embodiment, the guide limiting structure is provided in two sets, and the second guide members of the two sets of guide limiting structures are respectively provided at both ends of the moving spring 2 in the width direction, but are not limited thereto. Specifically, guide notches 21 are respectively provided at approximately the middle position of both ends of the moving spring 2 in the width direction. The guide notches 21 are approximately U-shaped, and the guide notches 21 are formed by the extended protrusions 22 protruding from the side of the moving spring 2. In this way, the setting of the guide notches 21 can avoid reducing the effective cross-sectional area of ​​the moving spring 2 and affecting the electrical conductivity and mechanical properties of the moving spring 2. The guide notches 21 can be replaced by guide holes or guide protrusions, which are equivalent replacements. The moving spring support 1 is formed with a frame-shaped part, which has a first side 11 and a second side 12 arranged opposite to each other in the moving direction of the moving spring 2, and a third side 13 and a fourth side 14 located between the first side 11 and the second side 12 and arranged opposite to each other. Specifically, the frame-shaped part has a square structure. The movable spring 2 is disposed within the frame-shaped portion. At least one side of the frame-shaped portion is provided with a first guide member, and an elastic member is provided between the second side 12 and the movable spring 2. The movable spring 2 being disposed within the frame-shaped portion means that the movable spring 2 is defined within the area of ​​the frame-shaped portion, rather than that the movable spring 2 is entirely located within the area of ​​the frame-shaped portion.

[0046] Specifically, each first guide member is provided on the first side 11 of the frame-shaped portion, that is, each guide rod 5 is fixed on the first side 11 of the frame-shaped portion, and the fixing method is preferably insert injection molding. Since this embodiment takes two sets of guide limiting structures as an example, there are two guide rods 5. The two guide rods 5 are distributed on both sides in the width direction of the moving spring 2 and are respectively adjacent to the third side 13 and the fourth side 14 of the frame-shaped portion. The guide rods 5 can be replaced by guide protrusions, and the guide protrusions are rib-shaped. In other embodiments, each first guide member is provided on the second side of the frame-shaped portion. In this case, the first guide member is preferably a guide rod, or the third side and the fourth side of the frame-shaped portion are respectively provided with first guide members. In this case, the first guide member is preferably a long strip-shaped guide protrusion or a long strip-shaped guide groove.

[0047] To improve the fixing firmness between the guide rod 5 and the moving spring bracket 1, this utility model can also be configured as follows: Figures 6-8As shown, reinforcing portions 16 are provided between the third side 13 and the fourth side 14 of the frame-shaped portion and the adjacent first guide member (i.e., guide rod 5), respectively. The reinforcing portions 16 limit one side of the first guide member in the direction of movement of the moving spring 2. The moving spring bracket 1 is provided with an extended protruding edge 17 located outside the first side 11. The extended protruding edge 17 limits the first guide member in the other side of the direction of movement of the moving spring 2. Specifically, the third side 13 and the fourth side 14 of the frame-shaped portion are integrally formed with reinforcing portions 16, and the reinforcing portions 16 partially cover one end of the guide rod 5. The other end of the guide rod 5 extends out of the frame-shaped portion and is limited between the first side 11 and the extended protruding edge 17. In this way, even if the guide rod 5 moves from one end to the other end, it will be stopped and limited by the extended protruding edge 22.

[0048] The aforementioned elastic element is a contact spring 4, with its two ends respectively fitted onto a first limiting protrusion 24 provided on the movable spring 2 and a second limiting protrusion 15 provided on the movable spring bracket 1. Specifically, the first limiting protrusion 24 is located at the center of the side of the movable spring 2 facing away from the movable contact 3, and the second limiting protrusion 15 is located on the second side 12 of the frame-shaped portion, with the first limiting protrusion 24 and the second limiting protrusion 15 arranged opposite to each other.

[0049] This utility model discloses a movable spring assembly, which includes at least two sets of guide and limiting structures between the movable spring 2 and the movable spring support 1. These structures guide the movement of the movable spring 2 relative to the movable spring support 1 and restrict the torsion of the movable spring 2 around an axis located in its direction of movement, thereby ensuring the stability of the contact and improving electrical durability. The guide and limiting structures are made of non-plastic material, which effectively avoids the generation of plastic debris, thus reducing poor contact or other abnormal problems caused by plastic debris adhering to the contact surface.

[0050] Since the moving spring 2 only moves relative to the moving spring support 1 after the contact point makes contact, thus achieving contact overtravel, each set of guide and limit structures only plays a guiding and limiting role after the contact point makes contact. That is, only after the moving contact 3 makes contact with the stationary contact will the first guide and the second guide have sliding friction. Since the first guide is located on the moving spring support 1, the sliding friction distance between the first guide and the second guide is relatively short, which can minimize the generation of metal chips and thus further improve the electrical reliability and mechanical durability of the relay.

[0051] Please see Figures 1-11 As shown, an electromagnetic relay of the present invention includes a stationary spring assembly and a magnetic circuit part 6, and also includes a moving spring assembly as described above. The moving spring bracket 1 is fixed relative to the moving iron core 63 of the magnetic circuit part 6. The moving iron core 63 drives the moving spring assembly to move along the moving direction of the moving spring 2, so that the moving contact 3 on the moving spring assembly and the stationary contact 91 on the stationary spring assembly are closed or opened.

[0052] This utility model also includes a base 7. The stationary spring assembly includes multiple stationary springs 9 and stationary contacts 91 disposed on each stationary spring 9, with each stationary contact 91 corresponding to a moving contact 3. The multiple stationary springs 9 are respectively disposed on the base 7 and located between the moving spring assembly and the magnetic circuit part 6. The base is provided with terminals 8 for each stationary spring 9, which are electrically connected to the stationary spring 9. The moving spring assembly and the yoke assembly of the magnetic circuit part 6 are located on opposite sides of the base 7. Specifically, the moving spring assembly is located above the base 7, and the yoke assembly of the magnetic circuit part 6 is located below the base 7. The moving iron core 63 is fixedly connected to the moving spring bracket 1, and the fixed connection method is preferably insert injection molding. The base 7 is provided with clearance through holes 71 corresponding to the moving iron core 63.

[0053] The magnetic circuit section 6, in addition to the aforementioned yoke assembly and moving iron core 63, also includes a coil frame 61 with coil 62 wound around it, a stationary iron core 64, a push rod 67, a first reaction spring 65, and a second reaction spring 66. The moving iron core 63 and the stationary iron core 64 are respectively disposed in the shaft holes of the coil frame, with the stationary iron core 64 located on the side of the moving iron core 63 away from the moving spring assembly. The yoke assembly includes a U-shaped yoke frame 68 and a yoke plate 69, which together form another frame-like portion. The coil frame 61 is disposed within the frame-like portion formed by the yoke frame 68 and the yoke plate 69. The stationary iron core 64 is connected to the yoke frame 68, and the yoke plate 69 also has a clearance through hole 691 corresponding to the moving iron core 63. In other embodiments, the U-shaped yoke frame is replaced by a yoke barrel, which is an equivalent substitution.

[0054] A push rod 67 is mounted on the moving iron core 63 and movably passes through the stationary iron core 64. A first reaction spring 65 and a second spring are respectively sleeved on the push rod 67, with the first reaction spring 65 abutting against the push rod 67 and the stationary iron core 64. The second reaction spring 66 is engaged between the moving iron core 63 and / or the push rod 67 and the stationary iron core 64, and the second reaction spring 66 is not in contact with the push rod 67 and the moving iron core 63 before being compressed. Specifically, the first reaction spring 65 is compressed in the initial stage of the moving iron core 63 moving in the direction that closes the contact point, and both the first reaction spring 65 and the second reaction spring 66 are compressed in the subsequent stage of the moving iron core 63 moving in the direction that closes the contact point. The initial stage refers to the earliest time period during which the moving iron core 63 begins to move in the direction that closes the contact point, and the subsequent stage refers to the process after the initial stage where the moving iron core 63 continues to move in the direction that closes the contact point until the action is completed. In this way, when the distance between the moving iron core 63 and the stationary iron core 64 is large, only the first reaction spring 65 provides a small reaction force, which can promote the rapid movement of the moving iron core 63 and ensure the rapid action in the initial state, thereby shortening the contact closing time. As the distance between the moving iron core 63 and the stationary iron core 64 decreases, the first reaction spring 65 and the second reaction spring 66 together provide a larger reaction force to ensure the speed when the contact is opened in the future.

[0055] A first positioning structure is provided between the yoke plate 69 and the base 7, and a second positioning structure is provided between the yoke plate 69 and the coil frame 61 to ensure the coaxiality of the yoke plate 69, the base 7, and the coil frame 61. The first positioning structure specifically includes a plurality of first positioning protrusions 72 and a first positioning groove 692 respectively provided for each first positioning protrusion 72. One of the yoke plate 69 and the base 7 is provided with a first positioning protrusion 72, and the other of the yoke plate 69 and the base 7 is provided with a first positioning groove 692. Specifically, in this embodiment, the first positioning protrusion 72 is provided on the base 7, and the first positioning groove 692 is provided on the yoke plate 69, but it is not limited thereto. The second positioning structure specifically includes multiple second positioning protrusions 693 and second positioning grooves 611 respectively provided for each second positioning protrusion 693. One of the yoke plate 69 and the coil frame 61 is provided with a second positioning protrusion 693, and the other of the yoke plate 69 and the coil frame 61 is provided with a second positioning groove 611. Specifically, in this embodiment, the second positioning protrusion 693 is provided on the yoke plate 69, and the second positioning groove 611 is provided on the coil frame 61, but it is not limited to this. The second positioning protrusions 693 and the first positioning grooves 692 are vertically aligned, and the yoke plate 69 is formed by stamping to create the second positioning protrusions 693 and the first positioning grooves 692.

[0056] The yoke plate 69 has a flange 694 extending away from the coil frame 61 around the periphery of the clearance through hole 71. The flange 694 is embedded in the clearance through hole 71 of the base 7. The flange 694 increases the magnetic conductive area of ​​the yoke plate 69, thereby improving the electromagnetic attraction.

[0057] The present invention also includes an upper cover 10 and a lower cover 20. The lower cover 20 is located at the bottom of the base 7 and encloses the yoke assembly therein; the upper cover 10 is located at the top of the base 7 and encloses the moving spring assembly therein.

[0058] For details on the structure and working principle of the moving spring assembly, please refer to the previous description; it will not be repeated here.

[0059] The present invention relates to a moving spring assembly and an electromagnetic relay. The parts not described herein are the same as or can be implemented using existing technologies.

[0060] The above embodiments are only used to further illustrate a moving spring assembly and an electromagnetic relay of 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. A moving spring assembly comprising a moving spring holder and at least one moving spring blade, the moving spring blade being movably arranged in the moving spring holder, and the moving spring blade being provided with a moving contact on one side in the direction of movement, and a spring element being arranged between the moving spring blade and the moving spring holder on the other side in the direction of movement; characterized in that: A plurality of groups of guiding and limiting structures are arranged between the moving spring sheet and the moving spring support, each group of guiding and limiting structures is made of non-plastic material, the plurality of groups of guiding and limiting structures guide the movement of the moving spring sheet relative to the moving spring support and limit the torsion of the moving spring sheet around the axis in the moving direction of the moving spring sheet.

2. The moving spring assembly of claim 1, wherein: Each group of guiding and limiting structures comprises a first guiding member and a second guiding member which are slidably fitted together along the moving direction of the moving spring sheet, the first guiding member and / or the second guiding member is in the shape of a long strip and extends along the moving direction of the moving spring sheet; the first guiding member is arranged on the moving spring support and the second guiding member is arranged on the moving spring sheet.

3. The moving spring assembly of claim 2, wherein: One of the first guiding member and the second guiding member is in the shape of a recess structure, the recess structure comprises one of a guiding hole, a guiding groove, a guiding notch and a long-strip-shaped guiding rail groove, and the other of the first guiding member and the second guiding member is in the shape of a guiding protrusion or a guiding rod.

4. The moving spring assembly of claim 2, wherein: The first guiding member is fixedly connected to the moving spring support, and the fixed connection mode comprises one or more of screw or bolt connection, insert injection molding, plug-in connection, adhesive connection and buckle connection; the second guiding member is arranged at the edge position of the moving spring sheet, and the second guiding member is integrally formed with the moving spring sheet.

5. The moving spring assembly of claim 2, wherein: The guiding and limiting structures are arranged in two groups, the second guiding members of the two groups of guiding and limiting structures are arranged at the two ends in the width direction of the moving spring sheet, the two ends in the length direction of the moving spring sheet are respectively provided with the moving contact, and the moving direction of the moving spring sheet is the thickness direction of the moving spring sheet.

6. The moving spring assembly of any one of claims 2-5, wherein: The moving spring support is formed with a frame-shaped portion, the frame-shaped portion has a first side and a second side which are oppositely arranged in the moving direction of the moving spring sheet, and a third side and a fourth side which are oppositely arranged between the first side and the second side; the moving spring sheet is arranged in the frame-shaped portion, at least one side of the frame-shaped portion is provided with the first guiding member, and the second side is provided with the elastic member relative to the moving spring sheet.

7. The moving spring assembly of claim 6, wherein: The first side of the frame-shaped portion is provided with each first guiding member; the first guiding member is in the shape of a long strip.

8. The moving spring assembly of claim 7, wherein: The third side and the fourth side are respectively arranged adjacent to a first guiding member, and a reinforcing portion is arranged between the third side and the fourth side and the adjacent first guiding member, the reinforcing portion limits one side of the first guiding member in the moving direction of the moving spring sheet; the moving spring support is provided with an extended protruding edge located outside the first side, the extended protruding edge limits the other side of the first guiding member in the moving direction of the moving spring sheet.

9. The moving spring assembly of claim 1, wherein: The elastic member is a contact spring, and the two ends of the contact spring are respectively sleeved with a first limiting protrusion arranged on the moving spring sheet and a second limiting protrusion arranged on the moving spring support.

10. An electromagnetic relay comprising a static spring assembly and a magnetic circuit portion, characterized by: Further comprising the moving spring assembly according to any one of claims 1-9, the moving spring support is fixed relative to the moving iron core of the magnetic circuit portion, the moving iron core drives the moving spring assembly to move along the moving direction of the moving spring sheet, so that the moving contact on the moving spring assembly is closed or disconnected with the stationary contact on the stationary spring assembly.

11. The electromagnetic relay according to claim 10, characterized in that: The base is further included, the static spring assembly comprises a plurality of static spring sheets and static contacts arranged on each static spring sheet, the static contacts correspond to the dynamic contacts one by one; the plurality of static spring sheets are arranged on the base respectively and located between the dynamic spring assembly and the magnetic circuit part, the yoke assembly of the dynamic spring assembly and the magnetic circuit part is located on two sides of the base opposite to each other, the dynamic iron core is fixedly connected with the dynamic spring support, and the base is provided with a clearance through hole corresponding to the dynamic iron core.

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