A moving spring bracket, a moving spring structure, and an electromagnetic relay

Abstract

This utility model discloses a moving spring bracket, a moving spring structure, and an electromagnetic relay. The moving spring bracket includes a fixed part and a support part arranged and opposite to each other along a first direction. The support part supports a bridge-type moving spring. The fixed part has at least one positioning part on each side of a second direction. The positioning parts on both sides of the fixed part correspond one-to-one, forming at least one set of paired positioning parts. The two positioning parts in each set are opposite to at least one bridge-type moving spring supported by the support part in the first direction, so as to provide an elastic element between the positioning part and the bridge-type moving spring. The first direction and the second direction are perpendicular to each other, and the second direction is consistent with the length direction of the bridge-type moving spring supported by the support part. The moving spring bracket of this utility model can replace the traditional contact support, providing a structural basis for realizing multi-point support of the bridge-type moving spring. This structural design helps to optimize the force distribution of the bridge-type moving spring and can significantly reduce the vibration amplitude during the breaking process.

Description

Technical Field

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

[0002] In existing bridge-type contact structures, a bridge-type moving spring is commonly used and mounted on a contact support. Specifically, the contact support adopts a frame-shaped structure design, with the middle part of the bridge-type moving spring housed within this frame structure, and its two ends protruding outwards from the frame structure. This structure limits the elastic interaction between the contact support and the bridge-type moving spring—a spring can only be placed between the contact support and the middle of the back of the bridge-type moving spring, and the force is transmitted to the bridge-type moving spring through a single-point elastic push.

[0003] However, the structural design of this type of contact support has significant flaws, mainly in the following aspects:

[0004] Uneven force distribution is a significant problem: Due to structural limitations, only a single spring can be configured between the contact support and the bridge-type moving spring, resulting in a single-point force application mode. Because the cantilever length of the bridge-type moving spring is relatively long, this single-point force application method easily leads to force imbalance at both ends of the moving contact. Especially after the moving contact undergoes multiple switching operations, the contact morphology will change significantly due to wear and deformation, further exacerbating the uneven force distribution and ultimately severely shortening the switching life of the contact.

[0005] Insufficient support stability: The bridge-type moving spring is supported only at a single point in the middle, resulting in significant sway after the moving contact disconnects. This can cause a noticeable difference in the contact gap between the two moving contacts, affecting the switching accuracy; furthermore, it may interfere with the effective extinguishing of the arc, increasing the risk of arc erosion of the contacts. This instability in the support structure directly leads to a significant decrease in the electrical durability and operational reliability of the relay. Utility Model Content

[0006] This utility model addresses the technical problems existing in the prior art by providing a moving spring bracket, a moving spring structure, and an electromagnetic relay. The moving spring bracket can replace the traditional contact support, providing a structural basis for multi-point support of the bridge-type moving spring. This structural design helps to optimize the force distribution of the bridge-type moving spring and can significantly reduce the vibration amplitude during the breaking process.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: a movable spring bracket, including a fixed part and a support part arranged and opposite to each other along a first direction, the support part being used to support a bridge-type movable spring; the fixed part is provided with at least one positioning part on each side of a second direction, the positioning parts on both sides of the fixed part are one-to-one corresponding to each other to form at least one pair of positioning parts, and the two positioning parts in each pair are arranged opposite to at least one bridge-type movable spring supported by the support part in the first direction, so as to provide an elastic element between the positioning part and the bridge-type movable spring; the first direction and the second direction are perpendicular to each other, and the second direction is consistent with the length direction of the bridge-type movable spring supported by the support part.

[0008] In a preferred embodiment, the device includes a contact support and at least one positioning plate. The contact support includes the fixing portion and the supporting portion. The positioning plate is connected to the fixing portion and extends beyond the fixing portion on both sides of the second direction. The portions of the positioning plate extending beyond the fixing portion on both sides of the second direction respectively form the positioning portions.

[0009] In a preferred embodiment, the fixing part is provided with a receiving groove, which is through in the second direction. The part of the positioning plate that cooperates with the fixing part is housed in the receiving groove, and a positioning structure is provided between the positioning plate and the receiving groove to position the positioning plate.

[0010] In a preferred embodiment, the positioning structure includes a positioning block and a positioning groove that are connected and cooperate with each other, and the connection method between the positioning block and the positioning groove includes at least one of the following: insertion fit, snap-fit ​​connection, interference fit, riveting connection, and welding; one of the positioning block and the positioning groove is disposed in the receiving groove, and the other of the positioning block and the positioning groove is disposed in the positioning plate.

[0011] In a preferred embodiment, the receiving groove has an opening on one side in a third direction, which is perpendicular to the first direction and the second direction; the positioning block is disposed in the receiving groove, the positioning groove is disposed on the positioning plate, and the positioning groove is a through notch along the first direction, with barbs at both ends; the positioning block has slots on both sides in the second direction; the positioning groove enters the receiving groove from the opening and accommodates the positioning block, and the barbs engage with the slots one by one.

[0012] In a preferred embodiment, the fixing part is provided with receiving grooves at both ends of the third direction, and the opening directions of the receiving grooves at both ends of the fixing part are opposite; two positioning plates are provided, and the two positioning plates correspond one-to-one with the receiving grooves at both ends of the fixing part.

[0013] In a preferred embodiment, the receiving groove has an opening on one side in the first direction, the positioning block is disposed in the receiving groove, the positioning groove is disposed on the positioning plate and is through in the first direction; the positioning block is inserted into the positioning groove, and the two are fixed by interference fit, hot riveting or welding.

[0014] In a preferred embodiment, the positioning plate has a first groove on the side facing away from the support portion, and the first groove and the second groove on the side facing away from the support portion of the fixing portion together form a dispensing groove, or the first groove and the receiving groove partially form a dispensing groove; by injecting glue into the dispensing groove, the positioning plate and the fixing portion are bonded and fixed.

[0015] In a preferred embodiment, the positioning plate is elongated and extends along the second direction, with its center connected to the fixing part; the number of positioning plates is the same as the number of bridge-type moving springs supported by the supporting part, and the positioning plates correspond one-to-one with the bridge-type moving springs; the contact support also includes two oppositely arranged sidewalls, which together with the fixing part and the supporting part form a frame structure.

[0016] This utility model also provides a moving spring structure, including at least one bridge-type moving spring, with moving contacts at both ends of the bridge-type moving spring; it also includes a moving spring bracket as described above, the bridge-type moving spring being disposed between the fixed part and the support part, and the two ends of the bridge-type moving spring extending beyond the support part on both sides in the second direction; a first elastic element is provided between the two positioning parts of each group and the corresponding bridge-type moving spring, each first elastic element abutting against the back of the bridge-type moving spring and elastically pushing the front of the bridge-type moving spring against the support part.

[0017] In a preferred embodiment, the corresponding positioning parts and the first elastic elements between each pair of corresponding bridge-type moving springs are symmetrically distributed on both sides of the middle portion of the bridge-type moving spring, and two of the first elastic elements respectively abut against the portions of the bridge-type moving springs where moving contacts are provided at both ends.

[0018] In a preferred embodiment, the back of the bridge-type moving spring is provided with a first positioning protrusion corresponding to each of the first elastic elements, and the side of the positioning part facing the bridge-type moving spring is provided with a second positioning protrusion. The first elastic element is a first spring, one end of the first spring is sleeved on the first positioning protrusion, and the other end of the first spring is sleeved on the second positioning protrusion.

[0019] The moving contact includes an integrally formed contact portion and a connecting portion. The connecting portion is riveted to the bridge-type moving spring, and the tail end of the connecting portion protrudes from the back of the moving spring and forms the first positioning protrusion. The contact portion is located on the front side of the bridge-type moving spring.

[0020] In a preferred embodiment, a second elastic element is provided between the fixing part and the bridge-type moving spring. The second elastic element abuts against the back of the bridge-type moving spring and elastically pushes the front of the bridge-type moving spring against the supporting part. The second elastic element is a second spring. One end of the second spring is sleeved on the third positioning protrusion provided in the middle of the back of the bridge-type moving spring, and the other end of the second spring is sleeved on the fourth positioning protrusion provided in the fixing part.

[0021] In a preferred embodiment, there are multiple bridge-type moving springs, which are arranged side by side along the width direction of the bridge-type moving springs. The paired positioning parts are arranged in multiple groups, and the multiple groups of positioning parts are arranged in a one-to-one correspondence with the multiple bridge-type moving springs.

[0022] The bridge-type moving spring and the support are equipped with a limiting structure for restricting the displacement of the bridge-type moving spring along its width direction and / or length direction. The limiting structure includes a limiting protrusion and a limiting groove that fit together along the thickness direction of the bridge-type moving spring. The limiting protrusion is provided in one of the bridge-type moving spring and the support, and the limiting groove is provided in the other of the bridge-type moving spring and the support.

[0023] This utility model also provides an electromagnetic relay, including two sets of stationary spring parts and a magnetic circuit part, and also includes a moving spring structure as described in this utility model above. The moving spring support is driven by the moving iron core of the magnetic circuit part and moves along the first direction, so that the moving contacts at both ends of the bridge-type moving spring are respectively closed or opened with the corresponding stationary contacts on the two sets of stationary spring parts.

[0024] In a preferred embodiment, the moving iron core is fixedly connected to the support portion by insert injection molding; it also includes a base, the two sets of stationary springs are mounted on the base, the magnetic circuit is mounted on the base, and the stationary springs and the magnetic circuit are located on opposite sides of the base. The base is provided with a guide groove corresponding to the moving spring bracket, and the moving spring bracket is slidably engaged with the guide groove.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. Because the fixing part of this utility model has at least one positioning part on each side in the second direction, and the positioning parts on both sides of the fixing part correspond one-to-one to form at least one set of paired positioning parts, each set of corresponding positioning parts is arranged opposite to at least one bridge-type moving spring supported by the support part, so that an elastic element can be set between the positioning part and the bridge-type moving spring. Therefore, this utility model can use paired positioning parts to replace the fixing part to set an elastic element between the positioning part and the bridge-type moving spring, so as to achieve multi-point support for the bridge-type moving spring. Therefore, the moving spring bracket of this utility model can replace the traditional contact support, providing a structural basis for achieving multi-point support for the bridge-type moving spring. This structural design helps to optimize the force distribution of the bridge-type moving spring, and can significantly reduce the vibration amplitude during the breaking process, reduce the arc extinguishing time between contacts, reduce the degree of contact ablation, and help to effectively extinguish the arc between contacts, thereby improving the application reliability of the relay.

[0027] 2. As a preferred embodiment, the moving spring bracket includes a contact support and a positioning plate. The positioning plate forms a pair of mating positioning parts. On the one hand, this allows the contact support and the positioning plate to be processed and formed independently, greatly improving processing flexibility and efficiency, and helping to reduce production costs. On the other hand, by integrating the pair of positioning parts using the positioning plate as a single component, the number of independent positioning parts and assembly steps can be reduced, thus lowering production and assembly costs. Furthermore, the positioning plate can serve as a standardized component, facilitating mass production and interchangeability.

[0028] 3. As a preferred embodiment, the fixing part is provided with a receiving groove, and the portion of the positioning plate that mates with the fixing part is housed within this receiving groove. Furthermore, a positioning structure is provided between the positioning plate and the receiving groove to ensure a precise fit. This design simplifies the connection between the positioning plate and the fixing part, making the assembly process more convenient and efficient. On the other hand, the enveloping fit of the receiving groove allows the positioning plate and the fixing part to form a tightly fitting overall structure, effectively reducing the abruptness of the component connection and improving the overall integrity and aesthetics of the structure.

[0029] 4. As a preferred embodiment, the side of the positioning plate facing away from the support portion has a first groove. This first groove, together with a second groove on the side of the fixing portion facing away from the support portion, forms an adhesive dispensing groove. Alternatively, the first groove and the receiving groove partially form an adhesive dispensing groove. By injecting adhesive into the dispensing groove, the positioning plate and the fixing portion can be firmly bonded and fixed. This design, through the supplementary fixing effect of adhesive bonding, further enhances the connection strength between the positioning plate and the fixing portion, ensuring that they maintain a stable fit during long-term use.

[0030] 5. As a preferred embodiment, the first elastic elements between each pair of positioning parts and the bridge-type moving spring are symmetrically distributed on both sides of the middle part of the bridge-type moving spring. This further ensures that the moving contacts at both ends of the bridge-type moving spring are subjected to more uniform force and that the contact gap is more consistent after breakage. Preferably, the two first elastic elements abut against the portions of the bridge-type moving spring at both ends where the moving contacts are located, so that the moving contacts can maintain a stable pressure distribution during contact, thereby improving the contact reliability and durability of the contacts.

[0031] 6. Multiple bridge-type moving springs are provided, and the multiple bridge-type moving springs are arranged side by side along the width direction of the bridge-type moving springs, so that the moving spring structure of this utility model constitutes multiple sets of bridge-type contact structures, which can reduce circuit impedance, reduce temperature rise, and the multiple bridge-type moving springs increase the heat dissipation area, which can further reduce the product temperature rise.

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the spring support and spring structure and electromagnetic relay of the present invention are not limited to the embodiments. Attached Figure Description

[0033] Figure 1 This is an exploded view (including the moving iron core) of the moving spring structure of this utility model, as described in Embodiment 1.

[0034] Figure 2-1 This is a three-dimensional structural diagram of a bridge-type moving spring according to an embodiment of a utility model. Figure 1 ;

[0035] Figure 2-2 This is a schematic diagram of the three-dimensional structure of the bridge-type moving spring of this utility model, which is significant for the implementation of the embodiment.

[0036] Figure 3 This is a front view of the bridge-type moving spring of the present invention, as described in Embodiment 1.

[0037] Figure 4 This is a three-dimensional structural diagram of the positioning plate of this utility model, as shown in the embodiment. Figure 1 ;

[0038] Figure 5 This is a three-dimensional structural schematic diagram of the positioning plate of the utility model in embodiment two;

[0039] Figure 6 This is a top view of the positioning plate of the utility model in embodiment 1;

[0040] Figure 7 This is a three-dimensional structural diagram (including the moving iron core) of the contact support of a utility model according to an embodiment;

[0041] Figure 8 This is a front view (including the moving iron core) of the contact support of a utility model according to an embodiment;

[0042] Figure 9 This is a transverse sectional view (including the moving iron core) of the contact support of a utility model according to an embodiment;

[0043] Figure 10 This is a three-dimensional structural schematic diagram of the moving spring structure of this utility model, as shown in the embodiment.

[0044] Figure 11 This is an exploded view of an electromagnetic relay of this utility model, as described in Embodiment 1.

[0045] Figure 12 This is a three-dimensional structural schematic diagram (excluding the top cover) of an electromagnetic relay of this utility model, as described in the embodiment.

[0046] Figure 13 This is a front view (excluding the top cover) of an electromagnetic relay of a utility model according to an embodiment;

[0047] Figure 14 This is a top view (excluding the top cover) of an electromagnetic relay of the present invention, according to an embodiment.

[0048] Figure 15 This is a left view (excluding the top cover) of an electromagnetic relay of a utility model according to an embodiment;

[0049] Figure 16 This is a cross-sectional view of an electromagnetic relay according to an embodiment of the present invention;

[0050] Figure 17 This is a three-dimensional structural diagram (including the moving iron core) of the moving spring structure of this utility model in Embodiment 2;

[0051] Figure 18 This is a three-dimensional structural diagram (including the moving iron core) of the contact support of this utility model in Embodiment 2;

[0052] Figure 19 This is a three-dimensional structural schematic diagram of the positioning plate of this utility model in Embodiment 2;

[0053] Figure 20 This is a three-dimensional structural diagram (including the moving iron core) of the moving spring bracket of this utility model in Embodiment 2;

[0054] Figure 21 This is a cross-sectional view (including the moving iron core) of the moving spring bracket of this utility model in Embodiment 2;

[0055] Figure 22 This is a three-dimensional structural schematic diagram of the electromagnetic relay of this utility model in Embodiment 2;

[0056] In the diagram, 1. Bridge-type moving spring; 11. Limiting groove; 12. Third positioning protrusion; 13. Relief groove; 2. Contact support; 21. Fixing part; 211. Fourth positioning protrusion; 212. Receiving groove; 213. Positioning block; 214. Slot; 215. Second groove; 22. Support part; 221. Limiting protrusion; 23. Side wall part; 24. Glue dispensing groove; 3. Moving contact; 31. Contact part; 32. Connecting part; 321. First positioning protrusion; 4. Positioning plate; 41. Second positioning protrusion 42. Positioning groove; 421. Barb; 43. First groove; 44. Positioning part; 5. First spring; 6. Second spring; 7. Static spring part; 71. Static spring plate; 72. Static contact; 8. Magnetic circuit part; 81. Yoke plate; 82. U-shaped yoke; 83. Coil frame; 84. Coil; 85. Moving iron core; 86. Static iron core; 87. Reaction spring; 88. Push rod; 9. Base; 91. Guide groove; 10. Terminal block; 20. Screw; 30. Top cover; 40. Bottom cover. Detailed Implementation

[0057] In this utility model, the terms "first," "second," and "third," 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 only 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.

[0058] Furthermore, in the description of this utility model, unless otherwise stated, "at least one" means one or more, and "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0059] Example 1

[0060] Please see Figures 1-10As shown, a movable spring structure of this utility model includes at least one bridge-type movable spring 1 and a movable spring support. Movable contacts 3 are respectively provided at both ends of the bridge-type movable spring 1, and the bridge-type movable spring 1 is disposed on the movable spring support. The movable spring support includes a fixing part 21 and a supporting part 22 arranged and opposite to each other along a first direction. The supporting part 22 is used to support the bridge-type movable spring 1. At least one positioning part 44 is provided on each side of the fixing part 21 in a second direction. The positioning parts 44 on both sides of the fixing part 21 correspond one-to-one, forming at least one set of paired positioning parts 44. That is, the number of positioning parts 44 on one side of the fixing part 21 in the second direction is equal to the number of positioning parts 44 on the other side of the fixing part 21 in the second direction, and they correspond one-to-one. The two positioning parts 44 in each set are arranged along the second direction. The two positioning parts 44 in each set are opposite to the at least one bridge-type movable spring 1 supported by the supporting part 22 in the first direction, so that an elastic element (i.e., the first elastic element described below) is provided between the positioning part 44 and the bridge-type movable spring 1. The first direction and the second direction are perpendicular to each other, and the second direction is consistent with the length direction of the bridge-type moving spring 1 supported by the support part 22, while the first direction is consistent with the thickness direction of the bridge-type moving spring 1.

[0061] In a preferred embodiment, the moving spring support specifically includes a contact support 2 and at least one positioning plate 4. The contact support 1 includes a fixing part 21 and a supporting part 22. The positioning plate 4 is connected to the fixing part 21, and the two ends of the positioning plate 4 extend beyond the sides of the fixing part 21 in a second direction. The portions of the positioning plate 4 extending beyond the sides of the fixing part 21 respectively form the aforementioned positioning portions 44, and the portions of the positioning plate 4 extending beyond the sides of the fixing part 21 form two positioning portions 44 in the same group. The contact support 2 also includes two sidewall portions 23 arranged and opposite to each other along a third direction. The two sidewall portions 23, together with the fixing part 21 and the supporting part 22, form a frame structure, within which the bridge-type moving spring 1 is defined. The third direction is perpendicular to the first and second directions. Both the positioning plate 4 and the contact support 2 are made of insulating material, preferably plastic. In other embodiments, the two positioning portions 44 in each group are integrally formed with the fixing part, or the two positioning portions 44 in each group are independent parts and fixedly connected to the fixing part.

[0062] The movable spring bracket of this utility model can replace the traditional contact support, providing a structural basis for multi-point support of the bridge movable spring: This utility model can use the positioning plate 4 to replace the fixing part 21 of the contact support 2 to set an elastic element between it and the bridge movable spring 1, so as to achieve multi-point support for the bridge movable spring 1. Specifically, the bridge movable spring 1 is located between the fixing part 21 and the support part 22, and the two ends of the bridge movable spring 1 extend beyond the two side edges of the support part 22 in the second direction; the part of the positioning plate 4 that extends beyond the two sides of the fixing part 21 in the second direction (i.e., the two positioning parts 44 in each pair) is respectively provided with a first elastic element between it and the bridge movable spring 1, and each first elastic element abuts against the back of the bridge movable spring 1 and elastically pushes the front of the bridge movable spring 1 against the support part 22.

[0063] In this embodiment, multiple bridge-type moving springs 1 and positioning plates 4 are provided. The multiple bridge-type moving springs 1 are arranged side-by-side along the width direction of the bridge-type moving springs 1, and each bridge-type moving spring 1 corresponds one-to-one with a positioning plate 4. The positioning plate 4 is elongated and extends along the length direction of the bridge-type moving springs 1. This design enables the moving spring structure of this utility model to form multiple sets of bridge-type contact structures. In this embodiment, two bridge-type moving springs 1 and two positioning plates 4 are used as examples for illustration, but this utility model is not limited to this quantity configuration. In other embodiments, the number of bridge-type moving springs 1 and positioning plates 4 can be flexibly set according to actual needs and design requirements. For example, one or more (more than two) bridge-type moving springs 1 and a corresponding number of positioning plates 4 can be provided to achieve different functional and performance requirements; or, for example, multiple bridge-type moving springs 1 and one positioning plate 4 can be provided, so that one positioning plate 4 can simultaneously correspond to multiple bridge-type moving springs 1.

[0064] like Figure 10 As shown, in the three-dimensional coordinate system, the spatial orientation of the bridge-type moving spring 1 corresponds to each coordinate axis: the length direction (i.e., the second direction) of the bridge-type moving spring 1 is consistent with the X-axis direction, the width direction (i.e., the third direction) is consistent with the Y-axis direction, and the thickness direction (i.e., the first direction) is consistent with the Z-axis direction.

[0065] Furthermore, the first elastic elements between the bridge-type moving spring 1 and the positioning plate 4 are symmetrically distributed on both sides of the middle portion of the bridge-type moving spring 1, which can further ensure that the moving contacts 3 at both ends of the bridge-type moving spring 1 are subjected to more uniform force and that the contact gap is more consistent after breakage. Preferably, two of the first elastic elements abut against the portions of the bridge-type moving spring 1 where the moving contacts 3 are located, so that the moving contacts 3 can maintain a stable pressure distribution during contact, thereby improving the contact reliability and durability of the contacts. In this embodiment, the number of first elastic elements between the bridge-type moving spring 1 and the positioning plate 4 is illustrated by example as two, but it is not limited to this. Therefore, the two first elastic elements are respectively fitted at both ends of the back side of the bridge-type moving spring 1. Each first elastic element is composed of the same type of elastic element, and its material, structure, and size are completely or substantially the same, so that each first elastic element can apply a uniform and consistent elastic force to the bridge-type moving spring 1, thereby ensuring the stability and reliability of the bridge-type moving spring 1 during movement.

[0066] As shown in Figure 2- Figure 4 As shown, the back of the bridge-type moving spring 1 is provided with a first positioning protrusion 321 corresponding to each of the first elastic elements, and the side of the positioning plate 4 facing the bridge-type moving spring 1 is provided with a second positioning protrusion 41 corresponding to each of the first elastic elements. The first elastic element is a first spring 5, one end of the first spring 5 is sleeved on the first positioning protrusion 321, and the other end of the first spring 5 is sleeved on the second positioning protrusion 41. In this embodiment, the moving contact 3 is fixed to the bridge-type moving spring 1 by riveting. Specifically, the moving contact 3 includes an integrally formed contact part 31 and a connecting part 32. The connecting part 32 is riveted to the bridge-type moving spring 1, and the tail end of the connecting part 32 protrudes from the back of the moving spring 1, forming the first positioning protrusion 321; the contact part 31 is located on the front side of the bridge-type moving spring 1. The setting of the first positioning protrusion 321 and the second positioning protrusion 41 can accurately position the position of the first spring 5, ensuring that the first spring 5 always maintains a stable and accurate assembly state during its operation. In other embodiments, the moving contact 3 is welded to the bridge-type moving spring 1, and the first positioning protrusion 321 is integrally formed or welded to the corresponding position on the back of the bridge-type moving spring 1.

[0067] In a preferred embodiment, a second elastic member is provided between the fixing part 21 and the bridge-type moving spring 1. One end of the second elastic member abuts against the fixing part 21, and the other end of the second elastic member elastically pushes the center of the front of the contact support 2 against the support part 22. The provision of the second elastic member can assist in supporting the bridge-type moving spring 1 and further improve the stability of the bridge-type moving spring 1 during operation.

[0068] The second elastic element is specifically a second spring 6. One end of the second spring 6 is sleeved on the third positioning protrusion 12 located in the middle of the back of the bridge-type moving spring 1, and the other end of the second spring 6 is sleeved on the fourth positioning protrusion 211 located in the fixing part 21. The third positioning protrusion 12 and the fourth positioning protrusion 211 can accurately position the second spring 6, ensuring that the second spring 6 always maintains a stable and accurate assembly state during its operation.

[0069] In this embodiment, the positioning plate 4 and the fixing part 21 of the contact support 2 can be connected by one or more of the following methods: insertion, interference fit, snap-fit ​​connection, adhesive connection, screw connection, welding (e.g., ultrasonic welding).

[0070] In a preferred embodiment, the fixing part 2121 is provided with a receiving groove 212, which is through-type along the second direction and has an opening on one side in the third direction. The part of the positioning plate 4 that mates with the fixing part 21 (i.e., the middle part of the positioning plate 4) is housed in the receiving groove 212, and a positioning structure is provided between the positioning plate 4 and the receiving groove 212 to position the positioning plate 4. In this embodiment, by providing a positioning structure, the positioning plate 4 can be limited simultaneously in the second direction and the opening direction of the receiving groove 212: it can constrain the displacement of the positioning plate 4 in the second direction to prevent it from moving along that direction; and it can limit the movement of the positioning plate 4 along the opening direction of the receiving groove 212 to prevent it from detaching from the receiving groove 212 from the opening, thereby ensuring the stability of the fit between the positioning plate 4 and the fixing part 21.

[0071] The positioning structure includes a positioning block 213 and a positioning groove 42 that are connected and cooperate with each other. The connection method between the positioning block 213 and the positioning groove 42 includes at least one of the following: insert fitting, snap-fit ​​connection, interference fit, and riveting connection. One of the positioning block 213 and the positioning groove 42 is disposed in the receiving groove 212, and the other of the positioning block 213 and the positioning groove 42 is disposed in the positioning plate 4. In this embodiment, the positioning block 213 is disposed in the receiving groove 212 and the positioning groove 42 is disposed in the positioning plate 4 as an example for explanation, but it is not limited to this. In other embodiments, the positioning structure is an adhesive structure, that is, the positioning plate 4 and the fixing part 21 are fixed by adhesive application.

[0072] In this embodiment, the positioning plate 4 enters the opening of the receiving groove 212, and the positioning block 213 is disposed in the receiving groove 212. The receiving groove 212 is fixed to the positioning block 213 on both sides and the bottom of the groove in the first direction. The positioning groove 42 is disposed on the positioning plate 4, and the positioning groove 42 is a through notch groove in the first direction. The two ends of the notch are respectively provided with barbs 421. The positioning block 213 is provided with slots 214 on both sides in the second direction. The positioning groove 42 enters the receiving groove 212 from the opening of the receiving groove 212 and accommodates the positioning block 213. The barbs 421 and the slots 214 engage with each other.

[0073] Since there are two bridge-type moving springs 1 and two positioning plates 4, the fixing part 21 of this utility model is specifically provided with receiving grooves 212 at both ends in a third direction, and the opening directions of the receiving grooves 212 at both ends of the fixing part 21 are opposite. The two positioning plates 4 are correspondingly matched with the receiving grooves 212 at both ends of the fixing part 21. Therefore, the two positioning plates 4 are respectively laterally clamped at both ends of the fixing part 21.

[0074] In a preferred embodiment, the positioning plate 4 has a first groove 43 on the side facing away from the support part 22. This first groove 43 and a second groove 215 on the side of the fixing part 21 facing away from the support part 22 together form an adhesive groove 24. By injecting adhesive into the adhesive groove 24, the positioning plate 4 and the fixing part 21 are bonded and fixed, thereby increasing the connection strength between the positioning plate 4 and the fixing part 21. Specifically, the first groove 43 is a blind groove (i.e., the first groove 43 does not penetrate the side of the positioning plate 4 facing the support part 22), which is roughly U-shaped and surrounds the positioning groove 42. The groove wall of the first groove 43 is formed by ribs protruding from the side of the positioning plate 4 facing away from the support part 22, and these ribs are roughly U-shaped. In other embodiments, the first groove 43 is a recessed groove structure. The second groove 215 is located at the end of the fixing part 21, and the second groove 215 is also a blind groove and a recessed groove structure. The second groove 215 is through in the second direction and through on the outward side in the third direction. The bottom of the first groove 43 overlaps with the side of the receiving groove 212 away from the bridge-type moving spring 1, and the groove wall of the first groove 43 and the second groove 215 of the fixing part 21 together form the glue dispensing groove 24.

[0075] In a preferred embodiment, the middle portion of the bridge-type moving spring 1 is fitted with a limiting structure to restrict displacement of the bridge-type moving spring 1 relative to the support portion 22 in its width and length directions. This limiting structure includes a limiting protrusion 221 and a limiting groove 11 that fit together along the thickness direction of the bridge-type moving spring 1. The limiting protrusion 221 is located in one of the bridge-type moving spring 1 and the support portion 22, and the limiting groove 11 is located in the other. In this embodiment, the limiting protrusion 221 is located on the support portion 22, and the limiting groove 11 is located in the center of the front surface of the bridge-type moving spring 1, precisely corresponding to the position of the aforementioned third positioning protrusion 12. Specifically, the bridge-type moving spring 1 is processed by a stamping process, so that the center of its front surface is recessed to form the limiting groove 11, while its back surface protrudes to form the third positioning protrusion 12. This design achieves a clever structural fit and facilitates processing and forming.

[0076] Furthermore, the two bridge-type moving springs 1 are respectively provided with relief grooves 13 extending through their thickness direction on the opposite outer sides of their middle parts, and the two side wall portions 23 of the contact support 2 are respectively fitted into the relief grooves 13 of the two bridge-type moving springs 1.

[0077] This invention discloses a moving spring structure. By providing a pair of positioning portions 44 (i.e., positioning plates 4) on the fixing portion 21 of the contact support 2, a positioning base is provided for one end of multiple first springs 5, thereby enabling multi-point support for the bridge-type moving spring 1. This multi-point support significantly improves the force distribution at both ends of the bridge-type moving spring 1 and greatly reduces the vibration amplitude of the bridge-type moving spring 1 during contact breaking. It ensures the synchronicity of the movement of the moving contacts 3 at both ends, making the pressure of the moving contacts 3 at both ends of the bridge-type moving spring 1 consistent or substantially consistent with that of the stationary contacts, and maintaining a consistent contact gap at both ends when the contacts break. This facilitates rapid arc extinguishing and improves breaking reliability. Therefore, this invention improves the stability of the bridge-type moving spring 1's movement, thereby enhancing the electrical durability and reliability of the product.

[0078] This invention also realizes the transformation of a single bridge contact structure into multiple bridge contact structures, which can shunt the load current, reduce circuit impedance, reduce temperature rise, and increase the heat dissipation area of ​​multiple bridge moving springs 1, which can further reduce the product temperature rise.

[0079] This utility model discloses a movable spring structure that can be widely used in various electrical devices such as relays and contactors, providing strong support for the stable operation and high-efficiency performance of these devices, and effectively improving the overall quality and reliability of related products. The following will provide a detailed description using the application of this utility model's movable spring structure to a relay as an example.

[0080] Please see Figures 1-16 As shown, an electromagnetic relay of this utility model includes two sets of stationary spring parts 7, a magnetic circuit part 8, and a moving spring structure as described above. The moving spring support is driven by the moving iron core 85 of the magnetic circuit part 8 and moves along the thickness direction (i.e., the first direction) of the bridge-type moving spring 1, so that the moving contacts 3 at both ends of the bridge-type moving spring 1 are closed or opened with the corresponding stationary contacts 72 on the two sets of stationary spring parts 7.

[0081] Multiple bridge-type moving springs 1 and positioning plates 4 are provided. The two sets of stationary spring sections 7 each include a stationary spring 71 and multiple stationary contacts 72 disposed on the stationary spring 71. The multiple stationary contacts 72 are arranged side-by-side along the width direction (i.e., the third direction) of the bridge-type moving spring 1 and correspond one-to-one with the moving contacts 3 at the corresponding ends of the multiple bridge-type moving springs 1. In this embodiment, two bridge-type moving springs 1 and positioning plates 4 are used as an example; therefore, each set of stationary spring sections 7 includes two stationary contacts 72.

[0082] The moving iron core 85 is fixedly connected to the middle of the support part 22 of the contact support 2 by insert injection molding. This connection method not only makes the moving iron core 85 and the moving spring bracket form a stable integral structure, eliminating additional assembly process, but also ensures the high synchronization of the two during the movement.

[0083] The electromagnetic relay of this utility model also includes a base 9, two sets of stationary spring portions 7 are installed on the base 9, and a magnetic circuit portion 8 is also installed on the base 9, with the stationary spring portions 7 and the magnetic circuit portion 8 located on opposite sides of the base 9. Specifically, the stationary spring plates 71 of the two sets of stationary spring portions 7 are respectively connected to the top of the base 9 by multiple screws 20, and the two sets of stationary spring portions 7 are respectively connected to terminals 10; the magnetic circuit portion 8 is also fixed to the bottom of the base 9 by screws. The magnetic circuit portion 8 specifically includes a yoke plate 81, a U-shaped yoke 82, a coil frame 83, a coil 84 wound around the coil frame 83, the aforementioned moving iron core 85, and a stationary iron core 86 fixed in the shaft hole of the coil frame 83. The two ends of the U-shaped yoke 82 face upwards, and the yoke plate 81 is connected to the two ends of the U-shaped yoke 82; the coil frame 83 is fixed between the yoke plate 81 and the bottom wall of the U-shaped yoke 82, and the stationary iron core 86 is riveted to the bottom wall of the U-shaped yoke 82. The base 9 is provided with a guide groove 91 corresponding to the contact support 2, and the contact support 2 is slidably fitted in the guide groove 91. The moving iron core 85 enters the shaft hole of the coil frame 83 through the through hole provided in the middle of the yoke plate 81, and a reaction spring 87 is fitted between the moving iron core 85 and the stationary iron core 86. The reaction spring 87 is sleeved on the outside of a push rod 88. The upper end of the push rod 88 is fixed relative to the moving iron core 85, and the lower end of the push rod 88 is movably inserted through the stationary iron core 86.

[0084] The electromagnetic relay of this utility model also includes an upper cover 30 and a lower cover 40. The upper cover 30 is connected to the top of the base 9 and wraps the moving spring structure; the lower cover 40 is connected to the bottom of the base 9 and wraps the magnetic circuit part 8.

[0085] The working principle of the electromagnetic relay of this utility model is as follows:

[0086] When coil 84 is energized, magnetic circuit section 8 generates a magnetic field. The moving iron core 85 is attracted by the stationary iron core 86, causing the moving spring support to move downwards until the moving iron core 85 and stationary iron core 86 are attracted together. As the moving spring support moves downwards, each bridge-type moving spring 1 also moves downwards until each moving contact 3 closes with its corresponding stationary contact 72. During this process, each first spring 5 and second spring 6 is gradually compressed, providing contact overtravel and contact engagement pressure. The reaction spring 87 is also gradually compressed.

[0087] When the coil 84 is de-energized, the magnetic field generated by the magnetic circuit part 8 disappears, and the moving iron core 85 moves upward under the reaction force of the reaction spring 87, causing the moving spring bracket to move upward along with each bridge-type moving spring 1 until each moving contact 3 is disconnected from the corresponding stationary contact 72, and each first spring 5 and second spring 6 returns to the initial pre-compression state.

[0088] Because the bridge-type moving spring 1 is pressed by multiple first springs 5, the bridge-type moving spring 1 can move smoothly during the contact and breakage process, thereby ensuring the synchronicity of the movement of the moving contacts 3 at both ends of the bridge-type moving spring 1. This makes the contact pressure of the moving contacts 3 at both ends of the bridge-type moving spring 1 consistent with that of the stationary contacts 72, and the contact gap between the moving contacts 3 at both ends of the bridge-type moving spring 1 and the stationary contacts 72 remains consistent when the contacts are broken.

[0089] Example 2

[0090] Please see Figures 17-21 As shown, the present invention provides a movable spring bracket and movable spring structure, which differs from the first embodiment described above in that: the bridge-type movable spring 1 is provided as a single unit, and the paired positioning parts 44 on the fixing part 21 are provided as a set. Similarly, the paired positioning parts 44 on the fixing part 21 are formed by the portion of the positioning plate 4 connected to the fixing part 21 extending beyond both sides of the fixing part 21. However, this is not a limitation. In other embodiments, each positioning part is integrally formed with the fixing part, or each positioning part is an independent component and is fixedly connected to the fixing part. Therefore, in this embodiment, the positioning plate 4 is also provided as a single unit, which is connected to the middle of the fixing part 21. The bridge-type movable spring 1 is pushed against the middle position of the support part 22 by a plurality of (two for example) first elastic members (for example, first spring 5) provided between it and the positioning plate 4.

[0091] In this embodiment, the middle part of the fixing part 21 is also provided with a receiving groove 212, and the middle part of the positioning plate 4 is accommodated in the receiving groove 212. Both are also fitted with a positioning structure, which includes a positioning block 213 and a positioning groove 43 that cooperate with each other. Specifically, the opening direction of the receiving groove 212 is located on one side of the first direction (taking the side of the first direction facing away from the bridge-type moving spring 1 as an example; this is a preferred embodiment). The positioning block 213 is disposed in the receiving groove 212, specifically at the bottom of the receiving groove 212. The positioning groove 43 is disposed on the positioning plate 4 and extends through the first direction. The positioning block 213 is inserted into the positioning groove 43, and the two are fixed by interference fit, hot riveting, or welding. Specifically, a portion of the positioning block 213 protrudes from the positioning groove 43, and this protruding portion can be fixedly fitted with the positioning groove 43 by hot riveting or welding (e.g., ultrasonic welding).

[0092] In a preferred embodiment, the positioning plate 4 also has a first groove 43 on the side facing away from the support part 22. This first groove 43 is a blind groove that runs through the third direction and forms a dispensing groove 24 with a portion of the receiving groove 212 (specifically, the two ends of the opening of the receiving groove 212). By injecting glue into the dispensing groove 24, the positioning plate 4 is bonded and fixed to the fixing plate. The groove walls on both sides of the first groove 43 are formed by two protruding ribs on the side of the positioning plate 4 facing away from the support part 22, but it is not limited to this. In other embodiments, the first groove 43 is a recessed groove structure. The positioning groove 43 penetrates the bottom of the first groove 43 and is centrally located at the bottom of the first groove 43.

[0093] The present invention provides a moving spring bracket and moving spring structure, the moving spring bracket of which can also replace the traditional contact support, providing a structural basis for realizing multi-point support of the bridge moving spring 1, thereby optimizing the force distribution of the bridge moving spring 1 and significantly reducing the vibration amplitude of the bridge moving spring 1 during the contact breaking process.

[0094] Please see Figures 17-22 As shown, an electromagnetic relay of this utility model includes two sets of stationary spring parts 7, a magnetic circuit part (not shown in the figure), and a moving spring structure as described above. The moving spring support is driven by the moving iron core 85 of the magnetic circuit part and moves along the thickness direction (i.e., the first direction) of the bridge-type moving spring 11, so that the moving contacts 3 at both ends of the bridge-type moving spring 11 are closed or opened with the corresponding stationary contacts 72 on the two sets of stationary spring parts 7.

[0095] Since there is only one bridge-type moving spring 1, only one stationary contact 72 is provided on the stationary spring 71 of each of the two sets of stationary spring sections 7.

[0096] In this embodiment, the structure and connection relationship of the magnetic circuit part, the base 9, etc., as well as the working principle of this utility model, are the same as or basically the same as those in the first embodiment above, and will not be repeated here.

[0097] The electromagnetic relay of this utility model is identical to or can be implemented using existing technology for the parts not described herein.

[0098] The above embodiments are only used to further illustrate a moving spring bracket and moving spring structure 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 movable spring bracket, comprising a fixing part and a supporting part arranged along a first direction and opposite to each other, the supporting part being used to support a bridge-type movable spring sheet; characterized in that: The fixing part is provided with at least one positioning part on each side of the second direction. The positioning parts on both sides of the fixing part correspond one-to-one to form at least one pair of positioning parts. The two positioning parts in each pair are arranged opposite to at least one bridge-type moving spring supported by the support part in the first direction, so as to provide an elastic element between the positioning part and the bridge-type moving spring. The first direction and the second direction are perpendicular to each other, and the second direction is consistent with the length direction of the bridge-type moving spring supported by the support part.

2. The movable spring bracket according to claim 1, characterized in that: It includes a contact support and at least one positioning plate. The contact support includes the fixing part and the supporting part. The positioning plate is connected to the fixing part and extends beyond the fixing part on both sides of the second direction. The portions of the positioning plate extending beyond the fixing part on both sides of the second direction respectively form the positioning parts.

3. The movable spring bracket according to claim 2, characterized in that: The fixing part is provided with a receiving groove, which is through in the second direction, and the part of the positioning plate that cooperates with the fixing part is housed in the receiving groove; a positioning structure is provided between the positioning plate and the receiving groove to position the positioning plate.

4. The movable spring bracket according to claim 3, characterized in that: The positioning structure includes a positioning block and a positioning groove that are connected and cooperate with each other, and the connection method between the positioning block and the positioning groove includes at least one of the following: insertion fit, snap-fit ​​connection, interference fit, riveting connection, and welding; one of the positioning block and the positioning groove is located in the receiving groove, and the other of the positioning block and the positioning groove is located in the positioning plate.

5. The movable spring bracket according to claim 4, characterized in that: The receiving groove has an opening on one side in a third direction, which is perpendicular to the first direction and the second direction. The positioning block is disposed in the receiving groove, and the positioning groove is disposed on the positioning plate. The positioning groove is a through notch along the first direction, with barbs at both ends. The positioning block has slots on both sides in the second direction. The positioning groove enters the receiving groove from the opening and accommodates the positioning block. The barbs and slots engage with each other.

6. The movable spring bracket according to claim 5, characterized in that: The fixing part is provided with receiving grooves at both ends of the third direction, and the opening directions of the receiving grooves at both ends of the fixing part are opposite; there are two positioning plates, and the two positioning plates correspond one-to-one with the receiving grooves at both ends of the fixing part.

7. The movable spring bracket according to claim 4, characterized in that: The receiving groove has an opening on one side in the first direction, the positioning block is disposed in the receiving groove, and the positioning groove is disposed on the positioning plate and is through along the first direction.

8. The movable spring bracket according to any one of claims 3-7, characterized in that: The positioning plate has a first groove on the side facing away from the support. The first groove and the second groove on the side facing away from the support of the fixing part together form a dispensing groove. Alternatively, the first groove and a portion of the receiving groove together form a dispensing groove. By injecting glue into the dispensing groove, the positioning plate and the fixing part are bonded and fixed.

9. The movable spring bracket according to claim 2, characterized in that: The positioning plate is long and extends along the second direction, with its middle part connected to the fixing part; the number of positioning plates is the same as the number of bridge-type moving springs supported by the supporting part, and the positioning plates correspond one-to-one with the bridge-type moving springs; the contact support also includes two side wall portions arranged opposite to each other, which together with the fixing part and the supporting part form a frame structure.

10. A movable spring structure, comprising at least one bridge-type movable spring, wherein movable contacts are respectively provided at both ends of the bridge-type movable spring; characterized in that: It also includes a movable spring bracket as described in any one of claims 1-9, wherein the bridge-type movable spring is disposed between the fixed part and the support part; a first elastic element is disposed between the two positioning parts of each group and the corresponding bridge-type movable spring, and each first elastic element abuts against the back of the bridge-type movable spring and elastically pushes the front of the bridge-type movable spring against the support part.

11. The movable spring structure according to claim 10, characterized in that: The corresponding positioning part and the first elastic element between each group and the bridge moving spring are symmetrically distributed on both sides of the middle part of the bridge moving spring, and two of the first elastic elements respectively abut against the parts where the bridge moving spring has moving contacts at both ends.

12. The movable spring structure according to claim 10 or 11, characterized in that: The back of the bridge-type moving spring is provided with a first positioning protrusion corresponding to each of the first elastic elements. The side of the positioning part facing the bridge-type moving spring is provided with a second positioning protrusion. The first elastic element is a first spring. One end of the first spring is sleeved on the first positioning protrusion, and the other end of the first spring is sleeved on the second positioning protrusion.

13. The movable spring structure according to claim 10, characterized in that: A second elastic element is provided between the fixing part and the bridge-type moving spring. The second elastic element abuts against the back of the bridge-type moving spring and elastically pushes the front of the bridge-type moving spring against the support part. The second elastic element is a second spring. One end of the second spring is sleeved on the third positioning protrusion provided in the middle of the back of the bridge-type moving spring, and the other end of the second spring is sleeved on the fourth positioning protrusion provided in the fixing part.

14. The movable spring structure according to claim 10, characterized in that: The bridge-type moving spring is provided in multiple ways, and the multiple bridge-type moving springs are arranged side by side along the width direction of the bridge-type moving springs. The paired positioning parts are provided in multiple sets, and the multiple sets of positioning parts are arranged in one-to-one correspondence with the multiple bridge-type moving springs.

15. The movable spring structure according to claim 10, characterized in that: The bridge-type moving spring and the support are equipped with a limiting structure for restricting the displacement of the bridge-type moving spring along its width direction and / or length direction. The limiting structure includes a limiting protrusion and a limiting groove that fit together along the thickness direction of the bridge-type moving spring. The limiting protrusion is provided in one of the bridge-type moving spring and the support, and the limiting groove is provided in the other of the bridge-type moving spring and the support.

16. An electromagnetic relay, comprising two sets of stationary spring sections and a magnetic circuit section, characterized in that: It also includes a moving spring structure as described in any one of claims 1-15, wherein the moving spring support is driven by the moving iron core of the magnetic circuit portion and moves along the first direction, so that the moving contacts at both ends of the bridge-type moving spring plate are respectively closed or opened with the corresponding stationary contacts on the two sets of stationary spring portions.

17. The electromagnetic relay according to claim 16, characterized in that: The moving iron core is fixedly connected to the support part by insert injection molding; it also includes a base, the two sets of stationary springs are installed on the base, the magnetic circuit is installed on the base, and the stationary springs and the magnetic circuit are located on opposite sides of the base. The base is provided with a guide groove corresponding to the moving spring bracket, and the moving spring bracket is slidably engaged with the guide groove.

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