Striking pin structure and magnetic circuit structure of relay and relay

Abstract

The invention relates to a striker structure of a relay, a magnetic circuit structure and the relay. The firing pin structure is provided with a connecting section and an impacting section; the permanent magnet and the yoke of the relay can be connected together by the connecting section; and the impact section is convexly arranged on one side, deviating from the connecting section, of the permanent magnet and can collide with a magnetizer of the relay, so that the magnetizer does not collide with the permanent magnet. The permanent magnet and the yoke are connected together through the firing pin structure, the impact section of the firing pin structure is located outside the permanent magnet, and when the magnetizer reciprocates at a high speed under the action of electromagnetic force, the magnetizer can impact the impact section of the firing pin structure instead of directly impacting the permanent magnet; the striker structure can bear the impact force applied by the magnetizer and can disperse most of the impact force on the yoke, so that the impact influence of the magnetizer on the permanent magnet is greatly reduced, the function failure of the magnetic circuit caused by brittle rupture of the permanent magnet can be avoided, and the working reliability of the magnetic circuit is improved.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a striker structure, magnetic circuit structure, and relay of a relay. Background Technology

[0002] Relays, as control components, are driving devices that use small currents to control large currents, and are widely used in aerospace, automotive, home appliances, and industrial control. In recent years, with the rapid development of the internet, internet data centers, which are crucial for supporting internet services, typically use magnetic latching relays for power switching control in their power supply circuits. To ensure that the relay can quickly switch to backup power upon receiving a control signal in the event of a main power failure, thus minimizing losses, the relay's switching time must be sufficiently short. To achieve rapid switching, its magnetic circuit mechanism (especially the iron core) needs to achieve high-speed movement with a large stroke. However, the high-speed reciprocating motion of the iron core under electromagnetic force can violently impact fixed components such as permanent magnets (magnets), subjecting the permanent magnets to significant mechanical impact forces. Because permanent magnet materials (such as neodymium iron boron) are highly brittle, they are prone to fracture, leading to magnetic circuit failure. Summary of the Invention

[0003] Therefore, it is necessary to provide a relay pin structure, magnetic circuit structure, and relay in response to the above-mentioned technical problems.

[0004] A relay firing pin structure having:

[0005] A connecting section that connects the permanent magnet of the relay to the yoke; and

[0006] The impact section protrudes from the side of the permanent magnet opposite to the connecting section and can collide with the magnetic conductor of the relay, so that the magnetic conductor does not collide with the permanent magnet.

[0007] In one embodiment, the permanent magnet has a first pinhole through which the impact pin passes, and the diameter of the impact segment is larger than the diameter of the first pinhole.

[0008] In one embodiment, the permanent magnet has a first pinhole, and the yoke has a second pinhole opposite to the first pinhole;

[0009] The connecting section includes a first through part, a second through part, and a riveting part connected in sequence. The first through part passes through a first pin hole, the second through part passes through a second pin hole, and the riveting part is located on the side of the yoke away from the permanent magnet and can be deformed to form an upsetting head. The upsetting head cooperates with the impact section to connect the permanent magnet and the yoke together.

[0010] In one embodiment, the first pinhole, the second pinhole, and the firing pin structure are coaxially arranged.

[0011] In one embodiment, the yoke has a plurality of reinforcing grooves on the side opposite to the magnetic conductor, and the plurality of reinforcing grooves are arranged circumferentially along the second pinhole and communicate with the second pinhole.

[0012] In one embodiment, the impact segment has a force buffer on the side facing the magnetic conductor.

[0013] In one embodiment, the force buffer is a rubber layer.

[0014] A magnetic circuit structure for a relay includes a yoke, a magnetic component, a coil component, and several firing pin structures as described in any one of the above.

[0015] The yoke forms a magnetic circuit space, the magnetic component is disposed in the magnetic circuit space and includes two oppositely arranged permanent magnets and a magnetic conductor movably disposed between the two permanent magnets, the striker structure is connected to the yoke and the corresponding permanent magnet, the coil assembly is fixedly disposed relative to the yoke and surrounds the outer periphery of the magnetic component, and the coil assembly can drive the magnetic conductor to move between the two permanent magnets.

[0016] In one embodiment, the magnetic conductor has grooves at both axial ends, the grooves being directly opposite the corresponding striker structure, and the groove depth being less than the impact section of the corresponding striker structure.

[0017] In one embodiment, the coil assembly includes two coil units, each coil unit having an axially through coil space, each permanent magnet being disposed in the coil space of the corresponding coil unit, and each axial end of the magnetic conductor being movably assembled in the coil space of the corresponding coil unit;

[0018] The outer circumferential surface of the magnetic conductor is fitted with a contact sleeve, which is configured to be connected to the push arm of the relay. The contact sleeve is in point contact or line contact with the coil unit.

[0019] In one embodiment, the outer peripheral surface of the contact sleeve or the inner peripheral surface of the coil unit is provided with a contact protrusion so that the contact sleeve and the coil unit make point contact or line contact.

[0020] A relay includes a magnetic circuit structure as described in any of the above.

[0021] Compared with the existing dual-drive magnetic circuit structure in which the permanent magnet is snapped onto the yoke, the present application uses a striker structure to connect the permanent magnet and the yoke together. The impact section of the striker structure is located outside the permanent magnet. When the magnetic conductor moves back and forth at high speed under the action of electromagnetic force, the magnetic conductor can impact the impact section of the striker structure instead of directly impacting the permanent magnet. The striker structure can absorb the impact force applied by the magnetic conductor and disperse most of the impact force on the yoke, which greatly reduces the impact of the magnetic conductor on the permanent magnet. This can avoid the failure of magnetic circuit function caused by the brittleness of the permanent magnet and improve the reliability of magnetic circuit operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the yoke, magnetic components, and striker structure of a magnetic circuit structure provided in an embodiment of this application.

[0023] Figure 2 for Figure 1 Side view of the yoke, magnetic components, and striker structure of the provided magnetic circuit structure.

[0024] Figure 3 for Figure 2 A cross-sectional view of the yoke, magnetic components, and striker structure of the provided magnetic circuit structure in the AA direction.

[0025] Figure 4 This is a cross-sectional view of the magnetic components and striker structure of a magnetic circuit structure provided in an embodiment of this application.

[0026] Figure 5 This is a schematic diagram of the firing pin structure provided in one embodiment of this application.

[0027] Figure 6 This is a schematic diagram of the permanent magnet structure of the magnetic circuit structure provided in one embodiment of this application.

[0028] Figure 7 This is a schematic diagram of the yoke of a magnetic circuit structure provided in an embodiment of this application.

[0029] Figure 8 A schematic diagram of the yoke of the magnetic circuit structure provided in another embodiment of this application.

[0030] Figure 9 This is a cross-sectional view of a relay provided in an embodiment of this application.

[0031] Figure 10 This is a schematic diagram of the transmission component and magnetic conductor of a relay provided in an embodiment of this application.

[0032] Figure 11 This is a schematic diagram of the structure of the cover plate of a relay provided in one embodiment of this application.

[0033] Figure 12 A schematic diagram of the structure of the moving part and moving contact assembly of a relay provided in one embodiment of this application.

[0034] The labels in the attached diagram are explained as follows:

[0035] 1. Relay; 10. Magnetic circuit structure; 100. Yoke; 100a. Second pinhole; 100b. Reinforcing groove; 110. Separate parts; 200. Magnetic component; 210. Permanent magnet; 210a. First pinhole; 220. Magnetic conductor; 220a. Groove; 230. Contact sleeve; 231. Contact protrusion; 300. Strike pin structure; 310. Impact section; 320. Connecting section; 321. First through-hole; 322. Second through-hole; 323. Riveting part; 400. Coil assembly; 410. Coil unit; 20. Transmission component; 30. Moving component; 301. Limiting protrusion; 40. Moving contact assembly; 50. Base; 501. Separator; 502. Cover plate; 503. Reinforcing part; 504. Limiting track; 50a. Magnetic circuit cavity; 50b. Contact cavity; Q. Gap. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] One embodiment of this application provides a striking pin structure 300 for a relay 1, such as... Figures 1 to 4As shown, the firing pin structure 300 has a connecting section 320 and an impact section 310; the connecting section 320 can connect the permanent magnet 210 of the relay 1 to the yoke 100; the impact section 310 protrudes from the side of the permanent magnet 210 away from the connecting section 320 and can collide with the magnetic conductor 220 of the relay 1, so that the magnetic conductor 220 does not collide with the permanent magnet 210.

[0043] The striking pin structure 300 can be made of high-strength and impact-resistant materials such as stainless steel or other metals, and can be applied to relay 1, especially... Figure 9 The relay 1 shown has a dual-drive magnetic circuit structure 10, which can solve the problem of permanent magnet 210 becoming brittle due to the impact of magnetic conductor 220 on permanent magnet 210.

[0044] Among them, the relay 1 with dual-drive magnetic circuit structure 10 can achieve fast switching compared with other relays, which can meet the switching time requirements of high computing power devices such as AI servers.

[0045] like Figure 9 As shown, the dual-drive magnetic circuit structure 10 may include a yoke 100, a magnetic component 200, and a coil component 400; the yoke 100 encloses a magnetic circuit space; the magnetic component 200 is disposed within the magnetic circuit space and includes two opposing permanent magnets 210 and a magnetic conductor 220 movably disposed between the two permanent magnets 210, the two permanent magnets 210 being fixedly disposed relative to the yoke 100; the coil component 400 is fixedly disposed relative to the yoke 100 and surrounds the outer periphery of the magnetic component 200, the coil component 400 being able to drive the magnetic conductor 220 to move between the two permanent magnets 210.

[0046] The permanent magnet 210 has a first magnetic pole surface and a second magnetic pole surface arranged opposite to each other. The two first magnetic pole surfaces abut against the yoke 100, and the two second magnetic pole surfaces are arranged face to face with the same polarity. When a current in a specific direction is applied to the coil assembly 400, the magnetic conductor 220 is magnetized, causing the end of the permanent magnet 210 near the magnetic conductor 220 to have the same polarity as the end of the permanent magnet 210 near the magnetic conductor 220, thus generating an electromagnetic repulsion force; simultaneously, the end of the permanent magnet 210 near the other permanent magnet 210 has the opposite polarity to the end of the permanent magnet 210 near the magnetic conductor 220, thus generating an electromagnetic attraction force. The electromagnetic attraction and electromagnetic repulsion forces are in the same direction and act together on the magnetic conductor 220, causing the magnetic conductor 220 to move under the dual action of the electromagnetic attraction and electromagnetic repulsion forces in the same direction. This enables the rapid movement of the magnetic conductor 220, thereby driving the contacts to complete the switching, with a switching speed as fast as 40ms.

[0047] However, the high-speed reciprocating motion of the magnetic conductor 220 under the action of electromagnetic force will violently impact the permanent magnet 210, subjecting the permanent magnet 210 to a large mechanical impact force. Due to the high brittleness of the permanent magnet 210 material, it is prone to brittle fracture, which will lead to the failure of the magnetic circuit function.

[0048] In response, this application provides a novel striker structure 300. The connecting section 320 of the striker structure 300 can connect the permanent magnet 210 and the yoke 100. Since the impact section 310 of the striker structure 300 protrudes from the outside of the permanent magnet 210, when the magnetic conductor 220 reciprocates at high speed under the action of electromagnetic force, the magnetic conductor 220 can impact the impact section 310 of the striker structure 300 instead of directly impacting the permanent magnet 210. The striker structure 300 can absorb the impact force applied by the magnetic conductor 220 and disperse most of the impact force on the yoke 100, greatly reducing the impact effect of the magnetic conductor 220 on the permanent magnet 210. This can avoid the failure of magnetic circuit function caused by the brittle fracture of the permanent magnet 210 and improve the reliability of magnetic circuit operation.

[0049] like Figure 6 As shown, in some embodiments of this application, the permanent magnet 210 has a first pinhole 210a through which the connecting section 320 passes, and the diameter of the impact section 310 is larger than the diameter of the first pinhole 210a. This arrangement of the diameters of the impact section 310 and the first pinhole 210a prevents the impact section 310 from entering the first pinhole 210a of the permanent magnet 210. The impact section 310 can axially limit the impact pin structure 300, preventing the impact section 310 from entering the first pinhole 210a and causing the impact pin structure 300 to detach from the permanent magnet 210 and the yoke 100, even if the impact force applied by the magnetic conductor 220 to the impact pin structure 300 is too large.

[0050] Regarding the axial thickness of the impact section 310, this application does not impose any limitations, as long as it can effectively withstand the impact force applied by the magnetic conductor 220. The cross-sectional shape of the impact section 310 can be... Figure 6 The circle shown can also be a polygon, or other regular or irregular shapes, and this application does not limit this.

[0051] Further, see Figure 7 In some embodiments of this application, the yoke 100 has a second pinhole 100a opposite to the first pinhole 210a; such as Figure 4 and Figure 5As shown, the connecting section 320 includes a first through-hole 321, a second through-hole 322, and a riveting part 323 connected in sequence. The first through-hole 321 passes through the first pin hole 210a, and the second through-hole 322 passes through the second pin hole 100a. The riveting part 323 is located on the side of the yoke 100 away from the permanent magnet 210 and can be deformed to form an upsetting head. The upsetting head cooperates with the impact section 310 to connect the permanent magnet 210 and the yoke 100 together. With this configuration, the permanent magnet 210 and the yoke 100 can be firmly connected together by the clamping of the riveting part 323 and the impact section 310. Figure 5 This is the structure before the riveted end deforms. Figure 4 This is the structure after the riveted end has deformed. It should be noted that... Figure 4 Although the impact section 310 and the permanent magnet 210 are shown to have a gap, the gap is very small and negligible, and will not cause the impact pin structure 300 to wobble axially.

[0052] The radial dimensions of the first through-hole 321, the second through-hole 322, and the riveting part 323 can be designed to match the dimensions of the first pinhole 210a and the second pinhole 100a. In one embodiment, the diameter of the first through-hole 321 is larger than the diameter of the second through-hole 322, and the diameter of the second through-hole 322 is equal to the diameter of the riveting part 323.

[0053] In one embodiment, such as Figure 8 As shown, the yoke 100 has multiple reinforcing grooves 100b on the side opposite to the magnetic conductor 220. These grooves are arranged circumferentially along the second pin hole 100a and communicate with it. When pressure is applied to the riveting part 323 to deform it into an upsetting head, the edge of the riveting part 323 is flattened and embedded into the reinforcing groove 100b, thus achieving a connection with the yoke 100 and improving the connection strength between the yoke 100 and the permanent magnet 210.

[0054] The reinforcement groove 100b can be a regular-shaped groove such as a circular groove or a square groove, or an irregular-shaped groove. The number of grooves can be set according to the requirements, such as 2, 3, 4, or 5 grooves evenly arranged along the axial direction.

[0055] In one embodiment, the first pinhole 210a, the second pinhole 100a, and the impact pin structure 300 are coaxially arranged. This arrangement allows the impact pin structure 300 to evenly distribute the impact force received to the area around the second pinhole 100a of the yoke 100, preventing the area around the second pinhole 100a from cracking due to stress concentration.

[0056] In some embodiments of this application, a force buffer section (not shown in the figures) is provided on the side of the impact section 310 facing the magnetic conductor 220. The force buffer section can buffer the impact of the magnetic conductor 220, prevent the yoke 100 from deforming due to excessive impact force, and ensure that the position of the permanent magnet 210 relative to the magnetic conductor 220 remains unchanged.

[0057] The force buffer can be a rubber layer. In one embodiment, the side of the impact section 310 facing the guide magnet 220 has a groove, and the rubber layer is embedded in the groove. In another embodiment, a fixing rod protrudes from the side of the impact section 310 facing the guide magnet 220, and a blind hole is provided on the side of the rubber layer facing the impact section 310, and the fixing rod is embedded in the blind hole.

[0058] On the other hand, one embodiment of this application also provides a magnetic circuit structure 10 for a relay 1, such as... Figure 9 As shown, the magnetic circuit structure 10 includes a yoke 100, a magnetic component 200, a coil component 400, and several striking pin structures 300 as described in any of the above. The yoke 100 forms a magnetic circuit space. The magnetic component 200 is disposed in the magnetic circuit space and includes two opposing permanent magnets 210 and a magnetic conductor 220 movably disposed between the two permanent magnets 210. The striking pin structure 300 is connected to the yoke 100 and the corresponding permanent magnets 210. The coil component 400 is fixedly disposed relative to the yoke 100 and surrounds the outer periphery of the magnetic component 200. The coil component 400 can drive the magnetic conductor 220 to move between the two permanent magnets 210.

[0059] This application connects the permanent magnet 210 and the yoke 100 together through a striker structure 300. The connecting section 320 of the striker structure 300 connects the permanent magnet 210 and the yoke 100. Since the impact section 310 of the striker structure 300 protrudes from the outside of the permanent magnet 210, when the magnetic conductor 220 reciprocates at high speed under the action of electromagnetic force, the magnetic conductor 220 can impact the impact section 310 of the striker structure 300 instead of directly impacting the permanent magnet 210. The striker structure 300 can absorb the impact force applied by the magnetic conductor 220 and disperse most of the impact force on the yoke 100, which greatly reduces the impact effect of the magnetic conductor 220 on the permanent magnet 210. This can avoid the failure of magnetic circuit function caused by the brittleness of the permanent magnet 210 and improve the reliability of magnetic circuit operation.

[0060] In some embodiments of this application, the number of striking pin structures 300 is set to two, with each striking pin structure 300 disposed at the center of the corresponding permanent magnet 210.

[0061] In some embodiments of this application, the yoke 100 can be an integral structure or a split structure. As an example, the yoke 100 may include four split parts 110 connected end to end, each of which is a yoke plate. It should be noted that... Figures 1 to 3 Only the yoke plates 100 on both sides of the magnetic conductor 220 are shown; the other two yoke plates are not shown. Two adjacent components 110 can be joined together by snap-fit.

[0062] As another example, the yoke 100 may include three parts 110 connected end to end, one of which is an L-shaped yoke 100, and the other two are yoke 100 plates. Adjacent parts 110 can be joined together by snap-fit.

[0063] As another example, the yoke 100 may include two separate parts 110 connected end to end, one of which is a U-shaped yoke and the other is a yoke plate. Adjacent parts 110 can be joined together by snap-fit.

[0064] In some embodiments of this application, the permanent magnet 210 is a magnetic steel and the magnetic conductor 220 is an iron core.

[0065] In some embodiments of this application, such as Figure 9 As shown, both axial ends of the magnetic conductor 220 are provided with grooves 220a, which are directly opposite the corresponding striker structure 300. The groove depth of the groove 220a is less than the impact section 310 of the corresponding striker structure 300. When the magnetic conductor 220 is attracted by one of the permanent magnets 210 and strikes the striker structure 300 on the permanent magnet 210, part of the impact section 310 of the striker structure 300 will extend into the groove 220a at the end of the magnetic conductor 220, thereby reducing the gap Q between the magnetic conductor 220 and the permanent magnet 210 and improving the working efficiency of the magnetic circuit. In addition, by setting the groove depth of the groove 220a to be less than the axial length of the impact section 310, the magnetic conductor 220 can be prevented from striking the permanent magnet 210.

[0066] In some embodiments of this application, such as Figure 9 As shown, the coil assembly 400 includes two coil units 410, each coil unit 410 having an axially penetrating coil space. A permanent magnet 210 is disposed in the coil space of the corresponding coil unit 410, and each axial end of a magnetic conductor 220 is movably assembled in the coil space of the corresponding coil unit 410; wherein, as... Figure 9 and Figure 10 As shown, a contact sleeve 230 is fitted on the outer peripheral surface of the magnetic conductor 220. The contact sleeve 230 is configured to be connected to the transmission component 20 of the relay 1. The contact sleeve 230 is in point contact or line contact with the coil unit 410.

[0067] By engaging the contact sleeve 230 with the coil unit 410 through point or line contact, the magnetic conductor 220 can be radially limited, allowing it to move along a preset trajectory and strike the striking pin structure 300 on the permanent magnet 210 without deviating from its intended path. Furthermore, by changing the contact method between the contact sleeve 230 and the coil assembly 400 from surface contact to point or line contact, the contact area between the contact sleeve 230 and the coil assembly 400 can be reduced, decreasing the frictional resistance during the movement of the magnetic conductor 220. This, in turn, increases the operating speed of the magnetic circuit mechanism under large strokes, meeting the requirements for rapid response.

[0068] Optionally, at least one of the outer peripheral surface of the contact sleeve 230 and the inner peripheral surface of the coil assembly 400 is provided with a plurality of contact protrusions, so that the contact sleeve 230 and the coil unit 410 are in point contact or line contact engagement. For example, a plurality of contact protrusions may be provided on the inner peripheral surface of the coil assembly 400, so that the plurality of contact protrusions on the inner peripheral surface of the coil assembly 400 form a point contact or line contact engagement with the outer peripheral surface of the contact sleeve 230; or, as... Figure 10 As shown, a plurality of contact protrusions 231 may be provided on the outer peripheral surface of the contact sleeve 230, so that the plurality of contact protrusions 231 on the outer peripheral surface of the contact sleeve 230 form a point contact engagement or a line contact engagement with the inner peripheral surface of the coil assembly 400; or, a plurality of contact protrusions may be provided on both the outer peripheral surface of the contact sleeve 230 and the inner peripheral surface of the coil assembly 400, and they may be staggered relative to each other, thereby allowing the outer peripheral surface of the contact sleeve 230 and the inner peripheral surface of the coil assembly 400 to have a point contact engagement or a line contact engagement with each other through the plurality of contact protrusions.

[0069] The surface of the contact protrusion 231 can be configured as a curved surface. The curved surface design can make the contact protrusion 231 smoother, which helps to reduce friction.

[0070] On the other hand, such as Figure 9 As shown, one embodiment of this application also provides a relay 1, which includes the magnetic circuit structure 10 described above.

[0071] The relay 1 can be a DC relay or a converter relay.

[0072] The relay 1 connects the permanent magnet 210 and the yoke 100 together through the striker structure 300. The connecting section 320 of the striker structure 300 connects the permanent magnet 210 and the yoke 100. Since the impact section 310 of the striker structure 300 protrudes from the outside of the permanent magnet 210, when the magnetic conductor 220 reciprocates at high speed under the action of electromagnetic force, the magnetic conductor 220 can impact the impact section 310 of the striker structure 300 instead of directly impacting the permanent magnet 210. The striker structure 300 can absorb the impact force applied by the magnetic conductor 220 and disperse most of the impact force on the yoke 100, which greatly reduces the impact effect of the magnetic conductor 220 on the permanent magnet 210. This can avoid the failure of magnetic circuit function caused by the brittleness of the permanent magnet 210 and improve the reliability of magnetic circuit operation.

[0073] See also Figure 9 In some embodiments of this application, the relay 1 further includes a base 50, a transmission member 20, a moving member 30, and a contact system. The base 50 has a partition 501 that divides the inner cavity of the base 50 into a magnetic circuit cavity 50a and a contact cavity 50b. A cover plate 502 is provided at the bottom of the base 50, which closes the contact cavity 50b. The magnetic circuit structure 10 is disposed in the magnetic circuit cavity 50a. The transmission member 20 passes between the magnetic circuit cavity 50a and the contact cavity 50b and is connected to the contact sleeve 230 and the moving member 30. Both the contact system and the moving member 30 are disposed within the contact system. The contact system includes a moving contact assembly 40 and a stationary contact assembly. The moving member 30 is connected to the moving contact assembly 40 and can drive the contact system to switch between a closed state and an open state.

[0074] In one embodiment, such as Figure 11 As shown, a limiting track 504 is provided on the side of the cover plate 502 facing the moving member 30, and the moving member 30 is slidably assembled along the limiting track 504. This arrangement allows the moving member 30 to drive the moving contact assembly 40 to move relative to the stationary contact assembly within the base 50 along a predetermined trajectory. It can also indirectly cooperate with the contact sleeve 230 and / or the contact protrusion 231 on the coil unit 410, jointly causing the magnetic conductor 220 to move along a predetermined trajectory and strike the striking pin structure 300 on the permanent magnet 210. Simultaneously, as... Figure 9 and Figure 12 As shown, a limiting protrusion 301 may also be provided on the side of the movable part 30 facing the cover plate 502, so that the movable part 30 can be slidably assembled with the limiting rail 504 through the limiting protrusion 301.

[0075] Of course, a limiting rail 504 may also be provided on the side of the partition 501 of the base 50 facing the moving member 30, and the moving member 30 may slide along the limiting rail 504.

[0076] In one embodiment, such as Figure 9As shown, the base 50 also includes a reinforcing section 503, which divides the magnetic circuit cavity 50a into a first sub-magnetic circuit cavity 50a and a second sub-magnetic circuit cavity 50a. The axial dimension of the first sub-magnetic circuit cavity 50a is larger than that of the second sub-magnetic circuit cavity 50a. The first sub-magnetic circuit cavity 50a is used to mount the magnetic circuit structure 10. The axial dimension of the moving member 30 is usually larger than that of the magnetic circuit structure 10, which means that a portion of the space in the magnetic circuit cavity 50a is not occupied by the magnetic circuit structure 10. To address this, this application provides a reinforcing section 503 in the unoccupied space, which can improve the internal support strength of the base 50.

[0077] Optionally, the riveting portion 323 of the firing pin structure 300 is spaced apart from the side wall or reinforcing portion 503 of the base 50 by a gap Q. The base 50 is usually made of plastic, and its hardness and strength are lower than those of the yoke 100. If the firing pin structure 300 comes into contact with the side wall or reinforcing portion 503 of the base 50, the impact force borne by the firing pin structure 300 will act on the side wall or reinforcing portion 503 of the base 50, thereby damaging the base 50. To address this, this application provides a gap Q between the riveting portion 323 of the firing pin structure 300 and the side wall or reinforcing portion 503 of the base 50, so that the impact force borne by the firing pin structure 300 cannot act on the side wall or reinforcing portion 503 of the base 50.

[0078] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A striking pin structure for a relay, characterized in that, have: The connecting section (320) is capable of connecting the permanent magnet (210) of the relay (1) to the yoke (100); and The impact section (310) protrudes from the side of the permanent magnet (210) away from the connecting section (320) and can collide with the magnetic conductor (220) of the relay (1) so that the magnetic conductor (220) does not collide with the permanent magnet (210).

2. The firing pin structure according to claim 1, characterized in that, The permanent magnet (210) has a first pinhole through which the connecting section (320) passes, and the diameter of the impact section (310) is larger than the diameter of the first pinhole (210a).

3. The firing pin structure according to claim 2, characterized in that, The yoke (100) has a second pinhole (100a) opposite to the first pinhole (210a). The connecting section (320) includes a first through part (321), a second through part (322), and a riveting part (323) connected in sequence. The first through part (321) passes through the first pin hole (210a), and the second through part (322) passes through the second pin hole (100a). The riveting part (323) is located on the side of the yoke (100) away from the permanent magnet (210) and can be deformed to form an upsetting head. The upsetting head cooperates with the impact section (310) to connect the permanent magnet (210) and the yoke (100) together.

4. The firing pin structure according to claim 3, characterized in that, The first pinhole (210a), the second pinhole (100a), and the impact pin structure (300) are coaxially arranged.

5. The firing pin structure according to claim 3, characterized in that, The yoke (100) has a plurality of reinforcing grooves (100b) on the side opposite to the magnetic conductor (220), and the plurality of reinforcing grooves (100b) are arranged along the circumference of the second pin hole and communicate with the second pin hole.

6. The firing pin structure according to any one of claims 1 to 5, characterized in that, The impact section (310) has a force buffer on the side facing the magnetic conductor (220).

7. The firing pin structure according to claim 6, characterized in that, The force buffer is a rubber layer.

8. A magnetic circuit structure for a relay, characterized in that, It includes a yoke (100), a magnetic assembly (200), a coil assembly (400), and several firing pin structures (300) as described in any one of claims 1 to 7. The yoke (100) forms a magnetic circuit space. The magnetic component (200) is disposed in the magnetic circuit space and includes two oppositely arranged permanent magnets (210) and a magnetic conductor (220) movably disposed between the two permanent magnets (210). The striker structure (300) is connected to the yoke (100) and the corresponding permanent magnet (210). The coil assembly (400) is fixed relative to the yoke (100) and surrounds the outer periphery of the magnetic component (200). The coil assembly (400) can drive the magnetic conductor (220) to move between the two permanent magnets (210).

9. The magnetic circuit structure according to claim 8, characterized in that, The magnetic conductor (220) has grooves (220a) at both axial ends. The grooves (220a) are directly opposite the corresponding striker structure (300), and the groove depth of the grooves (220a) is less than the axial length of the impact section (310) of the corresponding striker structure (300).

10. The magnetic circuit structure according to claim 8, characterized in that, The coil assembly (400) includes two coil units (410), each coil unit (410) having an axially penetrating coil space, the permanent magnet (210) being disposed in the coil space of the corresponding coil unit (410), and each axial end of the magnetic conductor (220) being movably assembled in the coil space of the corresponding coil unit (410). The outer peripheral surface of the magnetic conductor (220) is fitted with a contact sleeve (230), which is configured to be connected to the push arm of the relay (1). The contact sleeve (230) is in point contact or line contact with the coil unit (410).

11. The magnetic circuit structure according to claim 10, characterized in that, At least one of the outer peripheral surface of the contact sleeve (230) and the inner peripheral surface of the coil unit (410) is provided with a contact protrusion (231) so that the contact sleeve (230) and the coil unit (410) are in point contact or line contact engagement.

12. A relay, characterized in that, Includes the magnetic circuit structure (10) as described in any one of claims 8 to 11.

Images