Magnetic latching relay

Abstract

The utility model belongs to the technical field of relays, and discloses a magnetic latching relay. The magnetic latching relay comprises a shell, a static contact assembly, a contact assembly and an electromagnetic structure, the static contact assembly comprises a first static contact and a second static contact, the contact assembly is arranged in the shell and comprises a mounting part, an elastic part and a conductive bridge, the conductive bridge is movably arranged in the mounting part, the elastic part is fixed in the mounting part, and the electromagnetic structure is fixed in the shell. The drive assembly is used for driving the contact assembly to move between the connection position and the disconnection position. When the contact assembly is located at the switch-on position, the elastic member can apply an elastic force which enables the conductive bridge to abut against the first static contact and the second static contact. When the contact assembly is located at the disconnection position, the elastic piece abuts against the shell and can apply elastic force enabling the conductive bridge to move towards the first static contact and the second static contact. According to the utility model, the switching-on speed can be accelerated, the impact between the moving contact and the static contact is buffered, and the moving contact and the static contact are not easy to be separated when a short-circuit current is encountered.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to a magnetic latching relay. Background Technology

[0002] A magnetic latching relay is a new type of relay that, like other electromagnetic relays, automatically connects and disconnects circuits. The normally closed or normally open state of a magnetic latching relay depends entirely on the action of a permanent magnet, and its switching state is triggered by a pulse electrical signal of a certain width.

[0003] Existing magnetic latching relays achieve the switching of moving and stationary contacts through the cooperation of an electromagnetic structure and a bridge-type contact structure. The bridge structure has two sets of contacts; the two moving contacts on the bridge-type contact structure can only achieve current conduction and disconnection when they are simultaneously connected or disconnected with their corresponding two stationary contacts. When the moving contact in the bridge-type contact structure is driven by the electromagnetic structure, magnetic action is used to drive the moving contact, resulting in a slow driving speed and a slow connection speed between the moving and stationary contacts. Furthermore, this contact structure is highly susceptible to repulsion and arcing between the moving and stationary contacts when encountering a short-circuit current, easily causing the magnetic latching relay to burn out, resulting in an extremely high contact failure rate. Utility Model Content

[0004] The purpose of this invention is to provide a magnetic latching relay that can accelerate the connection speed, buffer the impact between the moving contact and the stationary contact, and prevent the moving contact and the stationary contact from being repelled when encountering a short circuit current, thus reducing the risk of burnout of the magnetic latching relay, lowering the failure rate of the contacts, and significantly improving the short circuit current withstand capability.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A magnetic latching relay, comprising:

[0007] case;

[0008] A stationary contact assembly includes a first stationary contact and a second stationary contact, wherein the first stationary contact and the second stationary contact are fixed to the housing at a distance.

[0009] A contact assembly is disposed in the housing. The contact assembly includes a mounting member, an elastic member, and a conductive bridge. The conductive bridge is movably disposed within the mounting member. The elastic member is fixed within the mounting member and located on the side of the conductive bridge away from the first stationary contact and the second stationary contact. The elastic member can abut the conductive bridge against the mounting member.

[0010] An electromagnetic structure is fixed inside the housing and is used to drive the contact assembly to move between the on and off positions;

[0011] The contact assembly is located in the connected position, and both the first stationary contact and the second stationary contact are in contact with the conductive bridge and conducting, and the elastic element can apply an elastic force to make the conductive bridge press against the first stationary contact and the second stationary contact;

[0012] The contact assembly is located in the disconnected position, both the first stationary contact and the second stationary contact are disconnected from the conductive bridge, and the elastic element abuts against the housing and is capable of applying an elastic force that moves the conductive bridge toward the first stationary contact and the second stationary contact.

[0013] In some possible implementations, the elastic element includes a first spring portion and a second spring portion, the second spring portion being disposed back-to-back with the first spring portion; wherein the first spring portion abuts against the conductive bridge; the contact assembly is located at the disconnected position, and the second spring portion abuts against the housing.

[0014] In some possible implementations, the conductive bridge is provided, with the first spring portion and the second spring portion arranged side by side, one first spring portion and two second spring portions, and the first spring portion located between the two second spring portions; or,

[0015] At least two conductive bridges are arranged side by side, the first spring piece and the second spring piece are arranged side by side, at least two first spring pieces are arranged and correspond one-to-one with the conductive bridges, the first spring piece abuts against the corresponding conductive bridge, and at least one second spring piece is provided between each two adjacent first spring pieces.

[0016] In some possible implementations, the first spring portion includes two first lugs arranged at an angle, both of which abut against the conductive bridge; and / or, the second spring portion includes two second lugs arranged at an angle, the contact assembly being located at the disconnect position, both of which abut against the housing.

[0017] In some possible implementations, the mounting component includes a first bracket and a second bracket, the first bracket being connected to the electromagnetic structure, the second bracket being fastened to the first bracket, the second bracket and the first bracket together forming a mounting cavity, the conductive bridge and the elastic element being located within the mounting cavity, and the elastic element being located on the side of the conductive bridge away from the first bracket.

[0018] In some possible implementations, the first support has at least two protrusions arranged side by side, with a conductive bridge sandwiched between each pair of adjacent protrusions, and all the protrusions are located on the same side of the elastic member, and the elastic member is clamped between at least one of the protrusions and the second support.

[0019] In some possible implementations, the protrusion includes two first protrusions and a second protrusion, the second protrusion being located between the two first protrusions, and the elastic member includes two opposing side tabs, the two side tabs being arranged one-to-one with the two first protrusions, and the side tabs being clamped between the corresponding first protrusion and the second support.

[0020] In some possible implementations, the second bracket is provided with a third protrusion, the elastic element is provided with a first positioning hole, and the third protrusion is inserted into the first positioning hole.

[0021] In some possible implementations, the electromagnetic structure includes a manual switch, an electromagnetic component, and an armature. The armature is connected to the contact assembly. The electromagnetic component is fixed to the housing and is used to drive the armature to move so as to move the contact assembly. The manual switch passes through the inner wall of the housing and is used to actuate the armature to move the armature.

[0022] In some possible implementations, the housing includes a base and an outer shell, the base being disposed within the outer shell, the manual switch passing through the inner wall of the base and slidably connected to the base, the manual switch having a pushing part, the outer shell having a display through hole, the pushing part extending into the display through hole and extending to the outside of the outer shell, the manual switch having an on / off indicator and an off indicator, and when the pushing part is pushed, the on / off indicator and the off indicator can be selectively exposed at the display through hole.

[0023] In some possible implementations, the first stationary contact includes a first plate and a second plate spaced apart, the first plate being arranged parallel to the conductive bridge, and the second plate being able to contact and conduct electricity with the conductive bridge.

[0024] In some possible implementations, the housing has a first enclosure plate located between the first flat plate and the conductive bridge, the contact assembly is located at the disconnect position, and the elastic element abuts against the first enclosure plate.

[0025] The beneficial effects of this utility model are:

[0026] The magnetic latching relay provided by this utility model includes a housing, a stationary contact assembly, a contact assembly, and an electromagnetic structure. When the elastic element is fixed inside the mounting component, it abuts the conductive bridge against the mounting component. At this time, the elastic element undergoes compressive deformation, which provides pressure to the conductive bridge, ensuring that the conductive bridge is firmly abutted against the mounting component. When the contact assembly is in the open position, and both the first and second stationary contacts are disconnected from the conductive bridge, the elastic element abuts against the housing. At this time, the elastic element undergoes compressive deformation. When the electromagnetic structure drives the contact assembly to move towards the closed position, the elastic element can apply an elastic force that moves the conductive bridge toward the first and second stationary contacts, providing some power for the movement of the contact assembly. This can accelerate the connection speed between the moving and stationary contacts, i.e., the connection speed between the conductive bridge and the first and second stationary contacts. In addition, when the contact assembly moves from the closed position to the open position, the elastic element makes elastic contact with the housing, which can act as a buffer. When the contact assembly is moved to the ON position, the elastic element can buffer the impact between the conductive bridge and the first and second stationary contacts, ensuring stable contact. When the contact assembly continues to move, the elastic element can apply an elastic force to press the conductive bridge against the first and second stationary contacts, providing contact pressure between the contacts and ensuring reliable contact. When encountering a short-circuit current, the conductive bridge is not easily repelled from the first and second stationary contacts, which is less likely to cause the magnetic latching relay to burn out, resulting in a lower failure rate of the contacts and significantly improving the short-circuit current withstand capability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the first part of the magnetic latching relay provided in Embodiment 1 of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the first stationary contact, the second stationary contact, and the two conductive bridges involved in Embodiment 1 of this utility model;

[0029] Figure 3 This is a schematic diagram of the contact component according to Embodiment 1 of this utility model;

[0030] Figure 4 This is an exploded view of the contact component involved in Embodiment 1 of this utility model;

[0031] Figure 5 This is a schematic diagram of the elastic element involved in Embodiment 1 of this utility model;

[0032] Figure 6 This is a schematic diagram of the current direction when the first stationary contact, the second stationary contact, and the two conductive bridges are connected according to Embodiment 1 of this utility model;

[0033] Figure 7 This is a schematic diagram of the second part of the magnetic latching relay provided in Embodiment 1 of this utility model;

[0034] Figure 8 This is a first-view structural schematic diagram of the magnetic latching relay provided in Embodiment 1 of this utility model;

[0035] Figure 9 This is an exploded view of the magnetic latching relay provided in Embodiment 1 of this utility model;

[0036] Figure 10 This is a first-view structural schematic diagram of the manual switch involved in Embodiment 1 of this utility model;

[0037] Figure 11 This is a second-view structural schematic diagram of the manual switch involved in Embodiment 1 of this utility model;

[0038] Figure 12 This is a schematic diagram of the structure of the outer shell and arc-extinguishing assembly involved in Embodiment 1 of this utility model;

[0039] Figure 13 This is a second-view structural schematic diagram of the magnetic latching relay provided in Embodiment 1 of this utility model;

[0040] Figure 14 This is a third-view structural schematic diagram of the magnetic latching relay provided in Embodiment 1 of this utility model;

[0041] Figure 15 This is a schematic diagram of the structure of the first stationary contact, the second stationary contact, and a conductive bridge involved in Embodiment 2 of this utility model;

[0042] Figure 16 This is a first-view structural schematic diagram of the contact component involved in Embodiment 2 of this utility model;

[0043] Figure 17 This is a second-view structural schematic diagram of the contact component involved in Embodiment 2 of this utility model;

[0044] Figure 18 This is an exploded view of the contact component involved in Embodiment 2 of this utility model;

[0045] Figure 19 This is a schematic diagram of the elastic element involved in Embodiment 2 of this utility model.

[0046] In the picture:

[0047] 1. Housing; 11. Receiving groove; 12. Base; 121. Fixing plate; 13. Outer shell; 131. Display through hole; 14. First enclosure plate; 15. Second enclosure plate;

[0048] 2. Stationary contact assembly; 21. First stationary contact; 211. First stationary contact point; 212. First through hole; 213. First plate; 214. Second plate; 215. Intermediate plate; 22. Second stationary contact; 221. Second stationary contact point; 222. Second through hole;

[0049] 3. Contact assembly; 31. Mounting component; 311. First bracket; 3111. First protrusion; 3112. Second protrusion; 3113. Fastening part; 3114. Insertion part; 3115. Partition; 312. Second bracket; 3121. Third protrusion; 3122. Fastening hole; 32. Elastic element; 321. First spring piece; 3211. First ear piece; 3212. First fixing piece; 322. Second spring piece; 3221. Second ear piece; 3222. Second fixing piece; 323. Bending part; 324. First positioning hole; 325. Side ear piece; 33. Conductive bridge; 331. First moving contact; 332. Second moving contact; 333. Third through hole; 334. First positioning groove; 335. Second positioning groove; 336. Second positioning hole;

[0050] 4. Electromagnetic structure; 41. Manual switch; 411. Pushing part; 412. Indicator plate; 413. First limiting surface; 414. Second limiting surface; 415. Limiting part; 42. Electromagnetic component; 43. Armature; 431. First armature piece; 432. Second armature piece; 44. On indicator; 45. Off indicator;

[0051] 5. Arc extinguishing assembly; 51. Permanent magnet; 52. Metal casing;

[0052] 6. Auxiliary circuit components. Detailed Implementation

[0053] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0054] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0057] Example 1

[0058] like Figures 1 to 14 As shown, this embodiment provides a magnetic latching relay, including a housing 1, a stationary contact assembly 2, a contact assembly 3, and an electromagnetic structure 4. The stationary contact assembly 2 includes a first stationary contact 21 and a second stationary contact 22, which are fixedly spaced and fixed to the housing 1. Specifically, the first stationary contact 21 has a first stationary contact point 211, and the second stationary contact 22 has a second stationary contact point 221. Further, as... Figure 2 As shown, the first stationary contact 21 has a first through hole 212, and the first stationary contact 211 is installed in the first through hole 212; the second stationary contact 22 has a second through hole 222, and the second stationary contact 221 is installed in the second through hole 222. The contact assembly 3 is disposed on the housing 1. The contact assembly 3 includes a mounting member 31, an elastic member 32, and a conductive bridge 33. The conductive bridge 33 is movably disposed within the mounting member 31. Specifically, the conductive bridge 33 has a first moving contact 331 and a second moving contact 332. The first moving contact 331 is correspondingly disposed to the first stationary contact 211, and the second moving contact 332 is correspondingly disposed to the second stationary contact 221. Further, the conductive bridge 33 has two third through holes 333 spaced apart along its length. The two third through holes 333 are respectively used to install the first moving contact 331 and the second moving contact 332. Figure 4 The length direction of the conductive bridge 33 is the length direction of the conductive bridge 33. Optionally, the conductive bridge 33 is a conductive plate. The elastic member 32 is fixed in the mounting member 31 and is located on the side of the conductive bridge 33 away from the first stationary contact 21 and the second stationary contact 22. The elastic member 32 can abut the conductive bridge 33 against the mounting member 31.

[0059] Electromagnetic structure 4 is fixed inside housing 1 and is used to drive contact assembly 3 to move between the ON and OFF positions. When contact assembly 3 is in the ON position, both the first stationary contact 21 and the second stationary contact 22 are in contact with conductive bridge 33 and are conductive. Elastic member 32 abuts against conductive bridge 33 and can apply an elastic force to press conductive bridge 33 against the first stationary contact 21 and the second stationary contact 22. Specifically, the first stationary contact 21 and the second stationary contact 22 are in contact with conductive bridge 33 and are conductive. This can be understood as the first stationary contact 211 contacting the first moving contact 331, and the second stationary contact 221 contacting the second moving contact 332. When contact assembly 3 is in the OFF position, both the first stationary contact 21 and the second stationary contact 22 are disconnected from conductive bridge 33. Elastic member 32 abuts against housing 1 and can apply an elastic force to move conductive bridge 33 toward the first stationary contact 21 and the second stationary contact 22. Specifically, both the first stationary contact 21 and the second stationary contact 22 are disconnected from the conductive bridge 33. This can be understood as the first stationary contact 211 being separated from the first moving contact 331, and the second stationary contact 221 being separated from the second moving contact 332.

[0060] When the elastic element 32 is fixed inside the mounting member 31, the elastic element 32 abuts the conductive bridge 33 against the mounting member 31. At this time, the elastic element 32 undergoes compressive deformation, which can provide pressure to the conductive bridge 33, making the conductive bridge 33 firmly abut against the mounting member 31. When the contact assembly 3 is in the disconnected position, and both the first stationary contact 21 and the second stationary contact 22 are disconnected from the conductive bridge 33, the elastic element 32 abuts against the housing 1. At this time, the elastic element 32 undergoes compressive deformation. When the electromagnetic structure 4 drives the contact assembly 3 to move towards the connected position, the elastic element 32 can apply an elastic force to move the conductive bridge 33 toward the first stationary contact 21 and the second stationary contact 22, providing some power for the movement of the contact assembly 3, which can accelerate the connection speed between the moving contact and the stationary contact, that is, the connection speed between the conductive bridge 33 and the first stationary contact 21 and the second stationary contact 22. Specifically, the elastic element 32 applies an elastic force to the mounting member 31, thereby causing the conductive bridge 33 to move toward the first stationary contact 21 and the second stationary contact 22. Furthermore, when the contact assembly 3 moves from the ON position to the OFF position, the elastic element 32 makes elastic contact with the housing 1, which can act as a buffer. Afterwards, the elastic element 32 disengages from the housing 1. When the contact assembly 3 is moved to the ON position, the elastic element 32 can buffer the impact between the conductive bridge 33 and the first stationary contact 21 and the second stationary contact 22, ensuring stable contact. As the contact assembly 3 continues to move, the elastic element 32 can apply an elastic force to press the conductive bridge 33 against the first stationary contact 21 and the second stationary contact 22, providing contact pressure between the contacts and ensuring reliable contact. In the event of a short circuit current, the conductive bridge 33 is less likely to be repelled from the first stationary contact 21 and the second stationary contact 22, which is less likely to cause the magnetic latching relay to burn out, resulting in a lower failure rate of the contacts and significantly improving the short circuit current withstand capability.

[0061] Optionally, the elastic element 32 includes a first spring portion 321 and a second spring portion 322, with the second spring portion 322 positioned back-to-back with the first spring portion 321. The first spring portion 321 abuts against the conductive bridge 33; the contact assembly 3 is in the disconnected position, and the second spring portion 322 abuts against the housing 1. This configuration simplifies the structure and facilitates the application of elastic force by the elastic element 32 to the conductive bridge 33. Optionally, to further simplify the structure of the elastic element 32 and facilitate its installation and processing, in this embodiment, the first spring portion 321 and the second spring portion 322 are integrally formed. In other embodiments, the first spring portion 321 and the second spring portion 322 are detachably connected.

[0062] Optionally, such as Figure 5 As shown, the first spring piece 321 includes two first lugs 3211 arranged at an included angle, both of which abut against the conductive bridge 33. The contact between the two angled first lugs 3211 and the conductive bridge 33 ensures a more balanced force distribution on the conductive bridge 33 and achieves reliable contact. Furthermore, the first spring piece 321 also includes a first fixing piece 3212, with the two first lugs 3211 positioned at opposite ends of the first fixing piece 3212. More specifically, the two first lugs 3211 are symmetrically distributed at opposite ends of the first fixing piece 3212.

[0063] Optionally, such as Figure 5 As shown, the second spring piece 322 includes two second lugs 3221 arranged at an included angle. The contact component 3 is in the disconnected position, and both second lugs 3221 abut against the housing 1. The abutment of the two angled second lugs 3221 against the housing 1 ensures a more balanced force on the mounting member 31 and achieves reliable contact. Furthermore, the second spring piece 322 also includes a second fixing piece 3222, with the two second lugs 3221 disposed at opposite ends of the second fixing piece 3222. Further, the two second lugs 3221 are symmetrically distributed at opposite ends of the second fixing piece 3222.

[0064] Optionally, the first fixing piece 3212 and the second fixing piece 3222 are integrally formed; further, the first fixing piece 3212 and the second fixing piece 3222 are integrally formed into a flat plate shape.

[0065] In addition, such as Figure 4 As shown, the abutting ends of the two first lugs 3211 and the two second lugs 3221 are all provided with bent portions 323. This arrangement can prevent damage to the conductive bridge 33 or the housing 1.

[0066] Optionally, such as Figure 3As shown, the mounting component 31 includes a first bracket 311 and a second bracket 312. The first bracket 311 is connected to the electromagnetic structure 4, and the second bracket 312 is fastened to the first bracket 311. The second bracket 312 and the first bracket 311 together form a mounting cavity. The conductive bridge 33 and the elastic element 32 are both located within the mounting cavity, with the elastic element 32 located on the side of the conductive bridge 33 away from the first bracket 311. This arrangement facilitates the assembly and disassembly of the mounting component 31 and ensures a relatively stable connection between the first bracket 311 and the second bracket 312. The electromagnetic structure 4 moves the first bracket 311, thereby moving the entire contact assembly 3.

[0067] Optionally, the first bracket 311 has at least two protrusions arranged side by side, with a conductive bridge 33 sandwiched between each pair of adjacent protrusions. All protrusions are located on the same side of the elastic member 32, and the elastic member 32 is clamped between at least one protrusion and the second bracket 312. By clamping the elastic member 32 between at least one protrusion and the second bracket 312, the elastic member 32 can be fixed without the need for a separate fixing structure, saving costs and facilitating installation.

[0068] Optionally, such as Figure 3 and Figure 4 As shown, the protrusion includes two first protrusions 3111 and one second protrusion 3112. The second protrusion 3112 is located between the two first protrusions 3111. The elastic member 32 includes two opposing side ears 325, which are arranged one-to-one with the two first protrusions 3111. The side ears 325 are clamped between the corresponding first protrusion 3111 and the second bracket 312. When the second bracket 312 is fastened to the first bracket 311, the elastic member 32 is clamped between the two first protrusions 3111 and the second bracket 312. In this embodiment, the two first protrusions 3111 are spaced apart along the length direction of the first bracket 311. Figure 3 The length direction of the first bracket 311 is the same as the length direction of the second bracket 312. This arrangement makes the force on the elastic element 32 more balanced and the fixing effect better. Furthermore, each of the two first protrusions 3111 has a fastening part 3113 on its opposite side, and the second bracket 312 has two fastening holes 3122, which correspond one-to-one with the two fastening parts 3113, and the fastening parts 3113 fasten with the fastening holes 3122. This arrangement allows the elastic element 32 to be clamped between the two first protrusions 3111 and the second bracket 312, while simultaneously achieving the fastening of the second bracket 312 with the first bracket 311. Specifically, the second bracket 312 is a U-shaped frame. This arrangement results in a simple structure and facilitates manufacturing.

[0069] Optionally, at least one end of the conductive bridge 33 is recessed with a positioning groove at both ends along the width direction, and the protrusion is inserted into the corresponding positioning groove along the thickness direction of the conductive bridge 33. Figure 4The width direction in the middle is the width direction of the conductive bridge 33. Figure 4 The thickness direction of the conductive bridge 33 is in the same direction as its thickness. This arrangement restricts the position of the conductive bridge 33, preventing it from shifting when the first moving contact 331 and the second moving contact 332 on the conductive bridge 33 come into contact with the first stationary contact 211 and the second stationary contact 221, respectively. Furthermore, a gap is provided between the positioning groove and the protrusion, allowing the conductive bridge 33 a certain amount of tilting space, which facilitates pressing the conductive bridge 33 against the first stationary contact 21 and the second stationary contact 22.

[0070] Specifically, the first support 311 is a T-shaped frame, and the T-shaped frame is provided with a plug-in part 3114, which is used to plug into the electromagnetic structure 4. This arrangement avoids interference with other structures, and the structure is simple and easy to manufacture.

[0071] Optionally, the second bracket 312 is provided with a third protrusion 3121, and the elastic member 32 is provided with a first positioning hole 324, with the third protrusion 3121 inserted into the first positioning hole 324. Inserting the third protrusion 3121 into the first positioning hole 324 allows for positioning of the elastic member 32 during installation. Specifically, the first positioning hole 324 is an oblong hole. Furthermore, the first positioning hole 324 is located at the center of the elastic member 32.

[0072] Optionally, the first spring portion 321 and the second spring portion 322 are arranged side by side, that is, the second spring portion 322 is disposed at one end of the first spring portion 321 along the width direction. Figure 5 The width direction is the width direction of the first spring piece 321; or, the first spring piece 321 and the second spring piece 322 are stacked, that is, the second spring piece 322 and the first spring piece 321 are arranged in sequence along the vertical direction, as long as the first spring piece 321 can apply an elastic force to make the conductive bridge 33 abut against the mounting member 31, and the second spring piece 322 can abut against the housing 1.

[0073] Optionally, at least two conductive bridges 33 are arranged side by side, and first spring parts 321 and second spring parts 322 are arranged side by side. At least two first spring parts 321 are provided, each corresponding to one conductive bridge 33. Each first spring part 321 abuts against its corresponding conductive bridge 33, and at least one second spring part 322 is provided between every two adjacent first spring parts 321. This arrangement allows multiple conductive bridges 33 to serve as backups for each other, reducing overall equipment failure caused by the failure of a single conductive bridge 33, thereby improving the reliability of the magnetic latching relay.

[0074] Specifically, in this embodiment, two conductive bridges 33 are arranged side by side, and first spring tabs 321 and second spring tabs 322 are arranged side by side. There are two first spring tabs 321, and each of the two first spring tabs 321 corresponds to one of the two conductive bridges 33. The first spring tab 321 abuts against the corresponding conductive bridge 33. There is one second spring tab 322, and a second spring tab 322 is provided between the two first spring tabs 321. Specifically, the two first spring tabs 321 are connected to the second fixing pieces 3222 of the second spring tab 322 through two first fixing pieces 3212. Specifically, the two first fixing pieces 3212 and the second fixing piece 3222 are integrally formed into a flat plate shape. In addition, the two first fixing pieces 3212 of the two first spring tabs 321 are respectively provided with side ears 325. The side ears 325 extend along the width direction of the first spring tab 321, and the second bracket 312 can press the side ears 325 against the end face of the first protrusion 3111. Optionally, the second spring portion 322 is provided with a first positioning hole 324, and the third protrusion 3121 is inserted into the first positioning hole 324.

[0075] Specifically, the positioning groove includes a first positioning groove 334 and a second positioning groove 335. The first positioning groove 334 is recessed at one end of the conductive bridge 33 along the width direction, and the first protrusion 3111 is inserted into the first positioning groove 334 along the thickness direction of the conductive bridge 33. Figure 4 The width direction in the middle is the width direction of the conductive bridge 33. Figure 4 The thickness direction of the conductive bridge 33 is the thickness direction of the conductive bridge 33. Furthermore, a second positioning groove 335 is recessed at the other end of the conductive bridge 33 along its width direction. The second protrusion 3112 is inserted into the two corresponding second positioning grooves 335 of the two conductive bridges 33 along the thickness direction of the conductive bridge 33, used to limit the relative position between the two conductive bridges 33. Further, the end face of the second protrusion 3112 abuts against the second fixing piece 3222 of the second elastic piece portion 322 to press the elastic member 32 against the second bracket 312. This arrangement makes the fixation of the elastic member 32 more secure. Further, the second protrusion 3112 has a cylindrical structure. In addition, partition plates 3115 are provided at both opposite ends of the second protrusion 3112, and the partition plates 3115 extend along the width direction of the first bracket 311. Figure 3 The width direction is the same as the width direction of the first support 311. By setting a partition 3115, the two conductive bridges 33 are separated to avoid interference.

[0076] Optionally, such as Figure 1 and Figure 6 As shown, the first stationary contact 21 includes a first plate 213 and a second plate 214 spaced apart. The first plate 213 is arranged parallel to the conductive bridge 33, and the second plate 214 can contact the conductive bridge 33 to conduct electricity. This arrangement, as shown... Figure 6As shown, when the contact assembly 3 is in the ON position, current I flows through the first stationary contact 21. The direction of the current flowing through the conductive bridge 33 is opposite to the direction of the current flowing through the first plate 213. The current flowing through the first plate 213 causes the conductive bridge 33 to be subjected to a force F in the pressing direction towards the first stationary contact 211 and the second stationary contact 221, providing greater contact pressure to the contacts. When the contacts encounter a short-circuit current, it can prevent the conductive bridge 33 from being repelled, thus achieving stable contact between the contacts and improving the short-circuit current resistance. Furthermore, the first stationary contact 21 also includes an intermediate plate 215, and the first plate 213, the intermediate plate 215, and the second plate 214 are connected in sequence.

[0077] Optionally, the housing 1 includes a first surrounding plate 14 located between the first flat plate 213 and the conductive bridge 33. The contact assembly 3 is in the disconnected position, and the elastic element 32 abuts against the first surrounding plate 14. It is understood that the first surrounding plate 14 can separate the elastic element 32 and the first flat plate 213, effectively preventing the elastic element 32 from conducting with the first flat plate 213. Further, the housing 1 includes a second surrounding plate 15 connected to the first surrounding plate 14, located between the intermediate plate 215 and the conductive bridge 33. By providing the second surrounding plate 15, it is convenient to position or support the first stationary contact 21 during installation, and the second surrounding plate 15 separates the elastic element 32 and the intermediate plate 215, effectively preventing the elastic element 32 from conducting with the intermediate plate 215.

[0078] Optionally, such as Figure 7 and Figure 8 As shown, the electromagnetic structure 4 includes a manual switch 41, an electromagnetic component 42, and an armature 43. The armature 43 is connected to the contact assembly 3. The electromagnetic component 42 is fixed to the housing 1 and is used to drive the armature 43 to move, thereby moving the contact assembly 3. The manual switch 41 passes through the inner wall of the housing 1 and is used to actuate the armature 43 to move it. The electromagnetic component 42 enables automatic movement of the armature 43, while the manual switch 41 enables manual movement of the armature 43. When the electromagnetic component 42 malfunctions, the armature 43 can be moved using the manual switch 41 to switch the circuit on and off, preventing disruption to the normal operation of the magnetic latching relay.

[0079] like Figure 7 As shown, when the electromagnetic component 42 receives a working electrical signal, it drives the armature 43 to move to the right, causing the first moving contact 331 to contact the first stationary contact 211 and the second moving contact 332 to contact the second stationary contact 221. When the electromagnetic component 42 receives a reset electrical signal, it drives the armature 43 to move to the left, causing the first moving contact 331 to separate from the first stationary contact 211 and the second moving contact 332 to separate from the second stationary contact 221, thus realizing the switching of the magnetic latching relay's on state.

[0080] Furthermore, the housing 1 includes a base 12 and an outer shell 13. The base 12 is disposed within the outer shell 13. The manual switch 41 passes through the inner wall of the base 12 and is slidably connected to the base 12. The manual switch 41 is provided with a pushing part 411. The outer shell 13 is provided with a display through hole 131. The pushing part 411 extends into the display through hole 131 and extends to the outside of the outer shell 13. Figure 9 As shown, the manual switch 41 is equipped with an ON indicator 44 and an OFF indicator 45. When the push part 411 is pushed, the ON indicator 44 and the OFF indicator 45 can be selectively exposed at the display through-hole 131. Furthermore, the ON indicator 44 is "ON" and the OFF indicator 45 is "OFF". This arrangement facilitates guidance for the operator to connect or disconnect the circuit. In addition, when the electromagnetic component 42 drives the armature 43 to move, switching the ON state of the magnetically latched relay, the ON state of the electromagnetic component 42 on the circuit can be determined by observing the ON indicator 44 and the OFF indicator 45 at the display through-hole 131. Specifically, as... Figure 10 As shown, the manual switch 41 is provided with an indicator plate 412, which has an "ON" shaped slot and an "OFF" shaped slot.

[0081] Furthermore, such as Figure 7 As shown, the armature 43 has a first armature piece 431 and a second armature piece 432, and a manual switch 41 is located between the first armature piece 431 and the second armature piece 432. When the manual switch 41 slides to the left, it moves the first armature piece 431 and the contact component 3 to the left, thus disconnecting the circuit. At this time, the disconnection indicator 45 is displayed at the display through hole 131. When the manual switch 41 slides to the right, it moves the second armature piece 432 and the contact component 3 to the right, thus connecting the circuit. At this time, the connection indicator 44 is displayed at the display through hole 131.

[0082] Optionally, such as Figures 9 to 11 As shown, the manual switch 41 is disposed between the armature 43 and the inner wall of the base 12, and is used to limit the extreme positions of the manual switch 41 along the width direction of the base 12. Figure 9 The width direction of the manual switch 41 is the width direction of the base 12. Specifically, the manual switch 41 is provided with a first limiting surface 413 and two second limiting surfaces 414. The first limiting surface 413 can abut against the inner wall of the base 12, one of the second limiting surfaces 414 can abut against the first armature piece 431, and the other second limiting surface 414 can abut against the second armature piece 432. Optionally, the base 12 includes a base body and a fixing plate 121. The fixing plate 121 is fixed to the base body, and the first limiting surface 413 can abut against the fixing plate 121. In addition, the limiting of the manual switch 41 along the length direction of the base 12 is achieved by the electromagnetic component 42. Figure 9 The length direction in the middle is the length direction of the base 12.

[0083] Optionally, such as Figure 7 As shown, the indicator plate 412 can abut against the outer surface of the base 12, and the manual switch 41 is provided with a limiting part 415, which is located inside the base 12 and can abut against the inner surface of the base 12. This arrangement limits the extreme positions of the manual switch 41 along the height direction of the base 12. Figure 9 The height direction in the middle is the height direction of the base 12.

[0084] Optionally, such as Figure 12 and Figure 13 As shown, the housing 1 has a receiving groove 11, which is located near the conductive bridge 33. Each receiving groove 11 contains an arc-extinguishing component 5, improving safety. Further, the arc-extinguishing component 5 includes a permanent magnet 51 and a metal shell 52, with the permanent magnet 51 located on the side of the metal shell 52 away from the conductive bridge 33. Optionally, two receiving grooves 11 are provided, each containing an arc-extinguishing component 5, with each of the two arc-extinguishing components 5 corresponding to one of the two conductive bridges 33. Optionally, the receiving groove 11 is a square hole. Specifically, as shown... Figure 9 As shown, the housing 1 includes a base 12, and two receiving slots 11 are located on opposite sides of the base 12 along its width direction. Figure 9 The width direction in the middle is the width direction of the base 12. Optionally, such as Figure 14 As shown, the magnetic latching relay also includes an auxiliary circuit assembly 6, which is used to detect the movement state of the contact assembly 3.

[0085] Example 2

[0086] This embodiment provides a magnetic latching relay, including a housing 1, a stationary contact assembly 2, a contact assembly 3, and an electromagnetic structure 4. The main difference between the magnetic latching relay provided in this embodiment and that in Embodiment 1 is that the number of conductive bridges 33, the number of first spring parts 321, and the number of second spring parts 322 in the contact assembly 3 are different. This embodiment will not describe the same structure as that in Embodiment 1.

[0087] like Figures 15 to 19 As shown, optionally, in this embodiment, the conductive bridge 33 is provided, and the first spring portion 321 and the second spring portion 322 are arranged side by side. There is one first spring portion 321 and two second spring portions 322, with the first spring portion 321 located between the two second spring portions 322. The contact assembly 3 is in the disconnected position, and both second spring portions 322 abut against the housing 1. This arrangement simplifies the structure of the contact assembly 3 and reduces manufacturing costs.

[0088] Optionally, the first spring piece 321 is provided with a first positioning hole 324, and the third protrusion 3121 is inserted into the first positioning hole 324. Specifically, the two second spring pieces 322 are connected to the first fixing piece 3212 of the first spring piece 321 through two second fixing pieces 3222. Specifically, the two second fixing pieces 3222 and the first fixing piece 3212 are integrally formed into a flat plate. In addition, the second bracket 312 can press the two second fixing pieces 3222 of the two second spring pieces 322 against the end face of the corresponding first protrusion 3111. Optionally, side ears 325 can also be provided on the two second fixing pieces 3222 of the two second spring pieces 322, the side ears 325 extending along the width direction of the first spring piece 321, and the second bracket 312 can press the side ears 325 against the end face of the first protrusion 3111.

[0089] Specifically, the positioning groove includes a first positioning groove 334. The conductive bridge 33 has first positioning grooves 334 recessed at both ends along its width direction. A first protrusion 3111 is inserted into the first positioning groove 334 along the thickness direction of the conductive bridge 33. Furthermore, the conductive bridge 33 has a second positioning hole 336 along its thickness direction. A second protrusion 3112 is inserted into the second positioning hole 336 along the thickness direction of the conductive bridge 33 to limit the position of the conductive bridge 33. Further, the end face of the second protrusion 3112 abuts against the first fixing piece 3212 of the first elastic piece portion 321 to press the elastic member 32 against the second bracket 312. This arrangement provides a more secure fixation of the elastic member 32. Further, the second protrusion 3112 has a cylindrical structure.

[0090] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A magnetic latching relay, characterized in that, include: Shell (1); The stationary contact assembly (2) includes a first stationary contact (21) and a second stationary contact (22), wherein the first stationary contact (21) and the second stationary contact (22) are fixed to the housing (1) at a distance. A contact assembly (3) is disposed in the housing (1). The contact assembly (3) includes a mounting member (31), an elastic member (32), and a conductive bridge (33). The conductive bridge (33) is movably disposed in the mounting member (31). The elastic member (32) is fixed in the mounting member (31) and is located on the side of the conductive bridge (33) away from the first stationary contact (21) and the second stationary contact (22). The elastic member (32) can abut the conductive bridge (33) against the mounting member (31). An electromagnetic structure (4) is fixed inside the housing (1) and is used to drive the contact assembly (3) to move between the on and off positions; The contact assembly (3) is located in the connected position, and the first stationary contact (21) and the second stationary contact (22) are both in contact with the conductive bridge (33) and conducting, and the elastic member (32) can apply an elastic force to make the conductive bridge (33) press against the first stationary contact (21) and the second stationary contact (22); The contact assembly (3) is located in the disconnected position, the first stationary contact (21) and the second stationary contact (22) are disconnected from the conductive bridge (33), and the elastic element (32) abuts against the housing (1) and is able to apply an elastic force to move the conductive bridge (33) toward the first stationary contact (21) and the second stationary contact (22).

2. The magnetic latching relay according to claim 1, characterized in that, The elastic element (32) includes a first spring plate portion (321) and a second spring plate portion (322), the second spring plate portion (322) and the first spring plate portion (321) being arranged back to back; wherein, the first spring plate portion (321) abuts against the conductive bridge (33); the contact assembly (3) is located at the disconnected position, and the second spring plate portion (322) abuts against the housing (1).

3. The magnetic latching relay according to claim 2, characterized in that, The conductive bridge (33) is provided, and the first spring piece (321) and the second spring piece (322) are arranged side by side. There is one first spring piece (321) and two second spring pieces (322), and the first spring piece (321) is located between the two second spring pieces (322); or, At least two conductive bridges (33) are arranged side by side. The first spring piece (321) and the second spring piece (322) are arranged side by side. At least two first spring pieces (321) are arranged in a one-to-one correspondence with the conductive bridges (33). The first spring piece (321) abuts against the corresponding conductive bridge (33). At least one second spring piece (322) is provided between each two adjacent first spring pieces (321).

4. The magnetic latching relay according to claim 2, characterized in that, The first spring portion (321) includes two first ear pieces (3211) arranged at an angle, both of which abut against the conductive bridge (33); and / or, the second spring portion (322) includes two second ear pieces (3221) arranged at an angle, the contact assembly (3) is located in the disconnected position, and both of the second ear pieces (3221) abut against the housing (1).

5. The magnetic latching relay according to claim 1, characterized in that, The mounting component (31) includes a first bracket (311) and a second bracket (312). The first bracket (311) is connected to the electromagnetic structure (4), and the second bracket (312) is fastened to the first bracket (311). The second bracket (312) and the first bracket (311) together form a mounting cavity. The conductive bridge (33) and the elastic member (32) are both located in the mounting cavity, and the elastic member (32) is located on the side of the conductive bridge (33) away from the first bracket (311).

6. The magnetic latching relay according to claim 5, characterized in that, The first bracket (311) has at least two protrusions arranged side by side, and a conductive bridge (33) is sandwiched between each pair of adjacent protrusions. All the protrusions are located on the same side of the elastic member (32), and the elastic member (32) is clamped between at least one of the protrusions and the second bracket (312).

7. The magnetic latching relay according to claim 6, characterized in that, The protrusion includes two first protrusions (3111) and one second protrusion (3112). The second protrusion (3112) is located between the two first protrusions (3111). The elastic member (32) includes two oppositely arranged side ears (325). The two side ears (325) are arranged in a one-to-one correspondence with the two first protrusions (3111). The side ears (325) are clamped between the corresponding first protrusion (3111) and the second bracket (312).

8. The magnetic latching relay according to claim 5, characterized in that, The second bracket (312) is provided with a third protrusion (3121), and the elastic element (32) is provided with a first positioning hole (324). The third protrusion (3121) is inserted into the first positioning hole (324).

9. The magnetic latching relay according to claim 1, characterized in that, The electromagnetic structure (4) includes a manual switch (41), an electromagnetic component (42), and an armature (43). The armature (43) is connected to the contact assembly (3). The electromagnetic component (42) is fixed to the housing (1) and is used to drive the armature (43) to move so as to drive the contact assembly (3) to move. The manual switch (41) passes through the inner wall of the housing (1) and is used to move the armature (43) to move the armature (43).

10. The magnetic latching relay according to claim 9, characterized in that, The housing (1) includes a base (12) and an outer shell (13). The base (12) is disposed inside the outer shell (13). The manual switch (41) passes through the inner wall of the base (12) and is slidably connected to the base (12). The manual switch (41) is provided with a push part (411). The outer shell (13) is provided with a display through hole (131). The push part (411) extends into the display through hole (131) and extends to the outside of the outer shell (13). The manual switch (41) is provided with an on mark (44) and an off mark (45). When the push part (411) is pushed, the on mark (44) and the off mark (45) can be selectively exposed at the display through hole (131).

11. The magnetic latching relay according to any one of claims 1-10, characterized in that, The first stationary contact (21) includes a first plate (213) and a second plate (214) spaced apart. The first plate (213) is arranged parallel to the conductive bridge (33), and the second plate (214) can make contact with the conductive bridge (33) to conduct electricity.

12. The magnetic latching relay according to claim 11, characterized in that, The housing (1) is provided with a first enclosure (14), which is located between the first flat plate (213) and the conductive bridge (33). The contact assembly (3) is located at the disconnection position, and the elastic element (32) abuts against the first enclosure (14).

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