Magnetic circuit portion of a relay and relay

Abstract

The application relates to a magnetic circuit part of a relay and a relay. The magnetic circuit part of the relay comprises a yoke assembly, a moving iron core, a static iron core, a coil and a magnetic retention assembly. The yoke assembly encloses a receiving space. The magnetic retention assembly is arranged in the receiving space. The moving iron core is movably arranged in the receiving space. The static iron core is opposite to the moving iron core in the movement direction of the moving iron core. The magnetic retention assembly and the coil are stacked along the movement direction of the moving iron core. The magnetic retention assembly is used for providing a magnetic retention force when the moving iron core is located at a first position or a second position. The magnetic retention assembly comprises a soft magnet and at least two permanent magnets. The soft magnet is used for conducting magnetic lines of force between the at least two permanent magnets. The soft magnet and the permanent magnets jointly enclose a moving space around the movement direction of the moving iron core. At least part of the structure of the moving iron core is located in the moving space when the moving iron core moves to the first position. The magnetic circuit part of the relay and the relay can reduce the cost and the assembly difficulty.

Description

Technical Field

[0001] This application relates to the field of electromagnetic switch technology, and in particular to the magnetic circuit part of a relay and the relay itself. Background Technology

[0002] As an electronic control device, a relay has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits and is essentially an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching. Magnetic latching DC relays, as a type of relay, are widely used in data centers, smart meters, new energy sources, and smart homes. Compared to monostable relays, magnetic latching relays have the advantage that the coil only needs a short-term power supply to maintain the relay's desired operating state, saving energy and avoiding the temperature rise problem caused by continuous coil power supply.

[0003] In related technologies, to ensure the performance of the magnetic circuit in a relay, a large number of permanent magnets are configured in the relay to provide magnetic holding force for the moving iron core in conjunction with the permanent magnets and the yoke assembly.

[0004] However, the extensive use of permanent magnets in the magnetic circuit section can lead to high costs and assembly difficulties. Summary of the Invention

[0005] Therefore, it is necessary to provide a magnetic circuit component and a relay to address the issues of high cost and difficult assembly of the magnetic circuit component.

[0006] On one hand, this application provides a magnetic circuit portion of a relay, the magnetic circuit portion comprising:

[0007] A yoke assembly that encloses and forms a receiving space;

[0008] The moving iron core is movably disposed within the aforementioned receiving space;

[0009] A stationary iron core is located within the receiving space, and the stationary iron core is opposite to the moving iron core in the direction of movement of the moving iron core;

[0010] A coil assembly is disposed within the receiving space and surrounds the periphery of the stationary iron core. The coil assembly is used to drive the moving iron core to move to a first position or a second position within the receiving space.

[0011] A magnetic holding assembly is disposed within the receiving space. The magnetic holding assembly and the coil assembly are stacked together along the movement direction of the moving iron core. The magnetic holding assembly is used to provide magnetic holding force when the moving iron core is located in the first position or the second position. The magnetic holding assembly includes a soft magnet and at least two permanent magnets. The soft magnet is used to conduct magnetic lines of force between the at least two permanent magnets. The soft magnet and the permanent magnets together enclose an active space in the movement direction surrounding the moving iron core. When the moving iron core moves to the first position, at least a portion of its structure is located within the active space.

[0012] In one embodiment, the magnetic holding assembly includes two first magnets and four second magnets. In a direction perpendicular to the movement of the moving iron core, the two first magnets are spaced apart from each other, and at least a portion of the structure of at least one second magnet is located between the two first magnets. The first magnet and the second magnet are either soft magnets or permanent magnets. The first magnets and the adjacent second magnets are in contact or have magnetic gaps.

[0013] In one embodiment, the cross-sectional shape of the second magnet in the direction of movement perpendicular to the moving iron core is triangular, and the opposing surfaces of the four second magnets all face the center of the active space.

[0014] In one embodiment, the cross-sectional shape of the four second magnets in the direction of movement perpendicular to the moving iron core is a right triangle, and the inclined surfaces of the four second magnets are arranged in a parallelogram.

[0015] In one embodiment, the magnetic holding assembly includes two first magnets and two second magnets. In a direction perpendicular to the movement of the moving iron core, the two first magnets are spaced apart from each other, and at least a portion of the structure of at least one second magnet is located between the two first magnets. The first magnet and the second magnet are either soft magnets or permanent magnets. The first magnets and the adjacent second magnets are in contact or have magnetic gaps.

[0016] In one embodiment, the two permanent magnets are a first permanent magnet and a second permanent magnet, and the two soft magnets are a first soft magnet and a second soft magnet, respectively. At least one of the first permanent magnet and the second permanent magnet is engaged with at least one of the first soft magnet and the second soft magnet.

[0017] In one embodiment, the magnetic circuit portion further includes at least one of the following technical solutions:

[0018] One of the first permanent magnet and the first soft magnet is provided with a first protrusion, and the other is provided with a first groove, wherein the first protrusion and the first groove are engaged in a locking fit;

[0019] Alternatively, one of the second permanent magnet and the second soft magnet is provided with a second protrusion, and the other is provided with a second groove, wherein the second protrusion and the second groove are engaged in a locking fit;

[0020] Alternatively, one of the first permanent magnet and the second soft magnet may have a third protrusion, and the other may have a third groove, wherein the third protrusion and the third groove are engaged in a locking fit.

[0021] Alternatively, one of the second permanent magnet and the first soft magnet may have a fourth protrusion, and the other may have a fourth groove, with the fourth protrusion engaging with the fourth groove.

[0022] In one embodiment, the outer surface of at least one of the second magnets is flush with the sides of the two first magnets.

[0023] In one embodiment, at least one end of at least one of the second magnets is provided with a stepped surface, the stepped surface abutting against the corner of an adjacent first magnet or having a magnetic gap therebetween.

[0024] In one embodiment, all the permanent magnets in the magnetic holding assembly have the same polarity facing the center of the active space.

[0025] In one embodiment, in the magnetic holding assembly, the total volume of the permanent magnet is greater than the total volume of the soft magnet.

[0026] In one embodiment, the yoke assembly includes a first wall, a second wall, and a side wall. The first wall is connected to the second wall via the side wall. In the direction of movement of the moving iron core, the first wall and the second wall are opposite to each other. The receiving space is formed between the first wall and the second wall. The magnetic holding assembly is located between the first wall and the coil assembly. The permanent magnets are all in contact with the side wall or have magnetic gaps.

[0027] When the moving iron core is located in the first position, the magnetic holding assembly, the side wall, the first wall and the moving iron core form a first closed magnetic circuit, and the moving iron core is magnetized and magnetically attracted to the first wall under the action of the first closed magnetic circuit;

[0028] When the moving iron core is in the second position, the magnetic holding assembly, the side wall, the second wall, the stationary iron core and the moving iron core form a second closed magnetic circuit. Under the action of the second closed magnetic circuit, the moving iron core is magnetized and magnetically attracted to the stationary iron core.

[0029] In one embodiment, the yoke assembly includes a yoke plate and a yoke cylinder, the yoke plate being connected to the inner wall of the yoke cylinder, the yoke plate forming the first wall, and the bottom wall of the yoke cylinder forming the second wall.

[0030] Alternatively, the yoke assembly includes a yoke plate and a U-shaped yoke, the yoke plate being connected to both ends of the U-shaped yoke, the yoke plate forming the first wall, and the bottom wall of the U-shaped yoke forming the second wall;

[0031] Alternatively, the yoke assembly includes a first yoke plate, a second yoke plate, and two side yoke plates. The two side yoke plates are spaced apart from each other and are connected between the first yoke plate and the second yoke plate. The first yoke plate forms the first wall, and the second yoke plate forms the second wall.

[0032] In one embodiment, the coil assembly includes a coil and a mounting bracket, the coil being wound on the mounting bracket having a mounting hole, at least a portion of the stationary core being disposed within the mounting hole; and the moving core being movably disposed within the mounting hole.

[0033] On the other hand, this application provides a relay, including the magnetic circuit portion of the relay as described above.

[0034] In one embodiment, the relay further includes a contact portion and a pushing mechanism. The contact portion includes a stationary contact and a moving contact piece. The pushing mechanism includes an insulating base and a pushing rod. One end of the pushing rod is connected to the insulating base, and the other end is connected to the moving iron core. The moving contact piece is disposed on the insulating base. When the moving iron core is in the first position, the moving contact piece is in contact with the stationary contact. When the moving iron core is in the second position, the moving contact piece is separated from the stationary contact.

[0035] In one embodiment, the relay further includes an elastic element disposed between the stationary iron core and the moving iron core, and when the coil assembly drives the moving iron core to move from the second position to the first position, the elastic element pushes the moving iron core to move towards the first position.

[0036] The magnetic circuit portion of the relay and the relay itself utilize a magnetic holding assembly to provide magnetic holding force when the moving iron core is in a first or second position. This allows the relay to remain in a closed or open state without continuous energization. Since the magnetic holding assembly includes a soft magnet and at least two permanent magnets, the soft magnet and permanent magnets together enclose an active space in the direction of movement around the moving iron core. When the moving iron core moves to the first position, at least a portion of its structure is located within this active space. The soft magnet conducts magnetic field lines between the at least two permanent magnets, thus the permanent magnets can magnetize the soft magnet. Consequently, the soft magnet and permanent magnets together form a stable magnetic field environment around the moving iron core, reducing magnetic flux leakage. Since the magnetic holding assembly uses a combination of soft magnets and permanent magnets to provide magnetic holding force for the moving iron core, compared with using permanent magnets entirely, the soft magnets in this application can reduce the amount of permanent magnet material used, thereby reducing costs; and the soft magnets themselves do not have magnetism, so there will be no difficulties in assembly or low assembly accuracy due to excessive magnetic force during assembly, thereby improving assembly efficiency and installation accuracy. Attached Figure Description

[0037] Figure 1 This is a cross-sectional structural diagram of a relay in the closed state according to one embodiment.

[0038] Figure 2 This is a cross-sectional structural diagram of a relay in the off state according to one embodiment.

[0039] Figure 3 This is a cross-sectional view of a relay along the plane containing the magnetic holding assembly, according to one embodiment.

[0040] Figure 4 In one embodiment of the relay, the magnetic field distribution pattern formed around the moving iron core by the magnetic holding component is shown.

[0041] Figure 5 This is a cross-sectional view of the relay along the plane where the magnetic holding assembly is located, according to another embodiment.

[0042] Figure 6 This is a cross-sectional view of the relay along the plane where the magnetic holding assembly is located, according to another embodiment.

[0043] Figure 7 This is a cross-sectional view of the relay along the plane where the magnetic holding assembly is located, according to another embodiment.

[0044] Figure 8 This is a cross-sectional view along the plane where the magnetic holding assembly is located, in another embodiment of the relay.

[0045] Figure 9 This is a cross-sectional view along the plane where the magnetic holding assembly is located, in another embodiment of the relay.

[0046] Figure 10 This is a cross-sectional view along the plane where the magnetic holding assembly is located, in another embodiment of the relay.

[0047] Figure 11 This is a cross-sectional view of the relay along the plane where the magnetic holding assembly is located, according to another embodiment.

[0048] Figure label:

[0049] 100. Relay; 10. Contact part; 11. Stationary contact; 12. Moving contact; 20. Pushing mechanism; 21. Insulating base; 22. Push rod; 30. Magnetic circuit part; 30a. First closed magnetic circuit; 30b. Second closed magnetic circuit; 31. Yoke assembly; 31a. First wall; 31b. Second wall; 31c. Side wall; 311. Yoke plate; 312. Yoke cylinder; 32. Moving iron core; 33. Stationary iron core; 34. Coil; 36. Mounting bracket; 36a. Mounting hole; 361. First mounting part; 362. Second mounting part; 35. Magnetic holding assembly Components: 351, First permanent magnet; 351a, First groove; 351b, Third groove; 3511, First magnetic pole surface; 352, First soft magnet; 352a, First protrusion; 352b, Fourth protrusion; 352c, Step surface; 353, Second permanent magnet; 353a, Second groove; 353b, Fourth groove; 3531, Second magnetic pole surface; 354, Second soft magnet; 354a, Second protrusion; 354b, Third protrusion; 35a, First magnet; 35b, Second magnet; 35c, Inclined surface; 40, Elastic element; 50, Insulating cover. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] Combination Figure 1 and Figure 2 As shown, this application provides a relay 100 that can be applied in automatic control circuits.

[0057] The relay 100 includes a contact portion 10, an actuation mechanism 20, and a magnetic circuit portion 30.

[0058] The contact portion 10 includes stationary contacts 11 and moving contact pieces 12. There can be two stationary contacts 11, with each end of the moving contact piece 12 corresponding to one of the two stationary contacts 11. The moving contact piece 12 can be moved closer to or further away from the stationary contacts 11 by the pushing mechanism 20, so that when the moving contact piece 12 is in contact with the stationary contacts 11, they are electrically connected, and when they are separated, they are electrically disconnected. Understandably, when the moving contact piece 12 is in contact with the two stationary contacts 11, it establishes the electrical connection between them.

[0059] The pushing mechanism 20 includes an insulating base 21 and a pushing rod 22, which are connected together. A moving contact 12 is disposed on the insulating base 21. The pushing rod 22, when in motion, moves the insulating base 21 closer to or further from the stationary contact 11, causing the moving contact 12 on the insulating base 21 to contact or separate from the stationary contact 11. This achieves electrical connection or disconnection between the moving contact 12 and the stationary contact 11, satisfying the need to connect or disconnect the automatic control circuit connected to the relay 100.

[0060] The magnetic circuit section 30 includes a yoke assembly 31, a moving iron core 32, a stationary iron core 33, a coil 34, and a magnetic holding assembly 35.

[0061] The yoke assembly 31 encloses and forms a receiving space, which is used to house structures such as the moving iron core 32, the stationary iron core 33, the coil 34, and the magnetic holding assembly 35.

[0062] The moving iron core 32 is movably disposed within the receiving space. The stationary iron core 33 is opposite to the moving iron core 32 in the direction of movement of the moving iron core 32. The coil 34 is disposed within the receiving space and surrounds the stationary iron core 33. The coil 34 is used to drive the moving iron core 32 to move to a first position or a second position within the receiving space. Therefore, by controlling the energization of the coil 34, the moving iron core 32 is driven to switch between the first position and the second position, thereby adapting to the control needs of the relay 100 to turn on or off its intervention in the automatic control circuit.

[0063] Specifically, one end of the push rod 22 is connected to the insulating base 21, and the other end is connected to the moving iron core 32. Thus, when the moving iron core 32 moves, it drives the insulating base 21 to move via the push rod 22, causing the moving contact 12 disposed on the insulating base 21 to move relative to the stationary contact 11. In this embodiment, when the moving iron core 32 is in the first position, the moving contact 12 is in contact with the stationary contact 11, thus electrically connecting the moving contact 12 and the stationary contact 11, thereby keeping the relay 100 in a closed state. Correspondingly, when the moving iron core 32 is in the second position, the moving contact 12 is separated from the stationary contact 11, thereby keeping the relay 100 in an open state.

[0064] The magnetic holding assembly 35 and the coil 34 are stacked together along the direction of movement of the moving iron core 32. The magnetic holding assembly 35 provides a magnetic holding force when the moving iron core 32 is in a first position or a second position. In this way, using the magnetic holding force provided by the magnetic holding assembly 35, the moving iron core 32 can be held in the first position or the second position when the coil 34 in the relay 100 is de-energized, thereby keeping the moving contact 12 of the relay 100 in a contact state or an open state relative to the stationary contact 11.

[0065] To facilitate understanding, we will continue with the following... Figure 1 and Figure 2 The working principle of the magnetic latching assembly 35 is explained by the relay 100 shown.

[0066] Continue to combine Figure 1 and Figure 2 As shown, the yoke assembly 31 includes a first wall 31a, a second wall 31b, and a side wall 31c. The first wall 31a is connected to the second wall 31b via the side wall 31c. In the direction of movement of the moving iron core 32, the first wall 31a and the second wall 31b are opposite each other. A receiving space is formed between the first wall 31a and the second wall 31b. It can be understood that, as Figure 2 As shown, taking the direction of movement of the moving iron core 32 as the vertical direction, the first wall 31a can be considered as the top wall of the yoke assembly 31, and the second wall 31b can be considered as the bottom wall of the yoke assembly 31. In some embodiments, the side wall 31c can be integrally formed with the second wall 31b, and the first wall 31a can be connected to the side wall 31c by welding or snap-fitting.

[0067] It should be noted that the structure of the yoke assembly 31 has multiple implementations.

[0068] For example, combining Figure 1 As shown, the yoke assembly 31 includes a yoke plate 311 and a yoke cylinder 312. The yoke plate 311 is connected to the inner wall 31c of the yoke cylinder 312. The yoke plate 311 forms the first wall 31a, and the bottom wall of the yoke cylinder 312 forms the second wall 31b.

[0069] For example, the yoke assembly 31 includes a yoke plate (not shown) and a U-shaped yoke (not shown). The yoke plate is connected to both ends of the U-shaped yoke. The yoke plate forms the first wall 31a, and the bottom wall of the U-shaped yoke forms the second wall 31b.

[0070] In other embodiments, the yoke assembly 31 includes a first yoke plate (not shown), a second yoke plate (not shown), and two side yoke plates (not shown). The two side yoke plates are spaced apart from each other and are connected between the first yoke plate and the second yoke plate. The first yoke plate forms a first wall 31a, and the second yoke plate 311 forms a second wall 31b.

[0071] The push rod 22 is movably inserted through the first wall 31a, so that one end of the push rod 22 can be connected to the movable contact piece 12 on the side of the first wall 31a facing away from the second wall 31b, and the other end can be connected to the movable iron core 32 on the side of the first wall 31a facing the second wall 31b.

[0072] In some embodiments, the magnetic holding assembly 35 is located between the first wall 31a and the coil 34, and the permanent magnets in the magnetic holding assembly 35 are in contact with the side wall 31c or have magnetic gaps.

[0073] Combination Figure 1 As shown, when the moving iron core 32 is in the first position, the magnetic holding assembly 35, the side wall 31c, the first wall 31a, and the moving iron core 32 form a first closed magnetic circuit 30a. Under the action of the first closed magnetic circuit 30a, the moving iron core 32 is magnetized and magnetically attracted to the first wall 31a. In this way, the position of the push rod 22 is maintained by the magnetic attraction of the moving iron core 32 to the first wall 31a, thereby keeping the moving contact 12 on the insulating base 21 in contact with the stationary contact 11.

[0074] Combination Figure 2 As shown, when the moving iron core 32 is in the second position, the magnetic holding assembly 35, side wall 31c, second wall 31b, stationary iron core 33, and moving iron core 32 form a second closed magnetic circuit 30b. Under the action of the second closed magnetic circuit 30b, the moving iron core 32 is magnetized and magnetically attracted to the stationary iron core 33. Thus, the position of the push rod 22 is maintained by the magnetic attraction of the moving iron core 32 to the stationary iron core 33, thereby keeping the moving contact 12 on the insulating base 21 separated from the stationary contact 11 to ensure insulation safety.

[0075] It should be noted that in the first closed magnetic circuit 30a and the second closed magnetic circuit 30b, magnetic lines of force can also be conducted between the two structural components through other structures. For example, in some embodiments, a first magnetic conductor is provided on the first wall 31a, and the first magnetic conductor is in contact with the first wall 31a or there is a magnetic gap between the first magnetic conductor and the first wall 31a to achieve magnetic conduction cooperation between the two. When the moving iron core 32 is in the first position, the moving iron core 32 is in contact with the first magnetic conductor or there is a magnetic gap between the moving iron core 32 and the first wall 31a through the first magnetic conductor, so that the magnetic holding assembly 35, the side wall 31c, the first wall 31a and the moving iron core 32 can still form the first closed magnetic circuit 30a. As another example, in some embodiments, a second magnetic conductor is provided on the second wall 31b, and the second magnetic conductor is in contact with the second wall 31b or there is a magnetic gap between the second magnetic conductor and the second wall 31b to achieve magnetic conduction cooperation between the two. When the moving iron core 32 is in the second position, it is in contact with the second magnetic guide or there is a magnetic gap between them. Thus, the moving iron core 32 engages with the second wall 31b through the second magnetic guide. In this way, the magnetic holding assembly 35, side wall 31c, second wall 31b, stationary iron core 33, and moving iron core 32 can still form the second closed magnetic circuit 30b. The first magnetic guide includes, but is not limited to, the iron core, and the second magnetic guide includes, but is not limited to, the magnetic cylinder.

[0076] In some embodiments, the relay 100 may be a relay including an auxiliary contact group. In this case, the magnetic conduction paths of the first closed magnetic circuit 30a and the second closed magnetic circuit 30b are adjusted, but overall, the first closed magnetic circuit 30a and the second closed magnetic circuit 30b are configured such that the magnetic holding assembly 35 can provide the moving iron core 32 with a magnetic holding force to maintain its current position. The magnetic conduction paths of the first closed magnetic circuit 30a and the second closed magnetic circuit 30b are not limited here, as long as they can satisfy the requirement that the magnetic holding assembly 35 can provide the moving iron core 32 with a magnetic holding force to maintain its current position in both the first and second positions.

[0077] Continue reading Figure 1 and Figure 2 As shown, the magnetic circuit portion 30 also includes a mounting bracket 36, on which the magnetic holding assembly 35 and the coil 34 are spaced apart. For ease of understanding, the portion of the mounting bracket 36 used to mount the coil 34 is referred to as the "first mounting portion 361," and the portion of the mounting bracket 36 used to mount the magnetic holding assembly 35 is referred to as the "second mounting portion 362." Specifically, the coil 34 is wound around the first mounting portion 361, and the magnetic holding assembly 35 is mounted on the second mounting portion 362.

[0078] It should be noted that the first mounting portion 361 and the second mounting portion 362 are arranged along the direction of movement of the moving iron core 32, thereby allowing the magnetic holding assembly 35 and the coil 34 to be stacked along the direction of movement of the moving iron core 32. The first mounting portion 361 and the second mounting portion 362 are interconnected. The connection methods between the two include, but are not limited to, snap-fit ​​connection, adhesive bonding, or screw connection. In some embodiments, the first mounting portion 361 and the second mounting portion 362 may also be integrally formed.

[0079] The mounting bracket 36 has a mounting hole 36a that extends through the first mounting portion 361 and the second mounting portion 362. At least a portion of the structure of the stationary iron core 33 is disposed within the mounting hole 36a, and the moving iron core 32 is movably disposed within the mounting hole 36a. With this arrangement, when the coil 34 is energized, the stationary iron core 33 can conduct magnetic lines of force to the moving iron core 32 as much as possible, allowing the moving iron core 32 to move and improving magnetic utilization.

[0080] In some embodiments, when the moving iron core 32 is in the first position, it is located outside the surrounding space of the coil 34. Thus, the moving iron core 32 does not occupy the surrounding space of the coil 34, facilitating the placement of a sufficiently large stationary iron core 33 within the mounting hole 36a corresponding to the surrounding space of the coil 34, and ensuring a sufficiently large gap between the stationary iron core 33 and the moving iron core 32, thereby allowing the moving iron core 32 to achieve a larger stroke. When the moving iron core 32 is in the second position, a portion of its structure is located within the surrounding space of the coil 34. This allows the coil 34 to better magnetize the moving iron core 32 when energized, thereby increasing the power to drive the moving iron core 32.

[0081] It should be noted that when a current in the first direction is applied to coil 34, the moving iron core 32 moves away from the stationary iron core 33 until it reaches the first position. At this point, when power is stopped on coil 34, the moving iron core 32 can be held in the first position by the magnetic holding assembly 35. When a current in the second direction is applied to coil 34, the moving iron core 32 moves away from the stationary iron core 33 until it reaches the second position. Here, the current in the second direction is opposite to the current in the first direction. At this point, when power is stopped on coil 34, the moving iron core 32 can also be held in the second position by the magnetic holding assembly 35.

[0082] Continue to combine Figure 1 and Figure 2As shown, in some embodiments, the relay 100 further includes an elastic element 40 disposed between the stationary iron core 33 and the moving iron core 32. When the coil 34 drives the moving iron core 32 to move from the second position to the first position, the elastic element 40 pushes the moving iron core 32 towards the first position. Since the moving contact 12 and the stationary contact 11 are spaced apart when the moving iron core 32 is in the second position, and the relay 100 is in the open state, and the moving contact 12 and the stationary contact 11 are in contact when the moving iron core 32 is in the first position, and the relay 100 is in the closed state, setting the elastic element 40 to push the moving iron core 32 towards the first position can assist the coil 34 in driving the moving iron core 32 towards the first position, thereby accelerating the movement of the moving iron core 32 to the first position, thus shortening the time for the relay 100 to switch from the open state to the closed state, and thereby improving the response efficiency of the relay 100.

[0083] The inventors discovered that in related technologies, to ensure the performance of the magnetic circuit section 30 in the relay 100, a large number of permanent magnets are configured in the relay 100. These permanent magnets typically use materials such as neodymium iron boron (NdFeB), and high-performance rare-earth permanent magnets especially require rare-earth elements. Therefore, the more permanent magnets used, the higher the cost. Furthermore, the strong magnetic attraction of permanent magnets can lead to assembly difficulties or decreased assembly accuracy when installing a large number of them, due to excessive attractive or repulsive forces between them.

[0084] In response, in one embodiment of this application, at least one of the above-mentioned problems is solved by improving the structure of the magnetic circuit portion 30.

[0085] Specifically, in this embodiment, the magnetic holding assembly 35 includes a soft magnet and at least two permanent magnets. The soft magnet is used to conduct magnetic field lines between the at least two permanent magnets. Understandably, the soft magnet's ability to conduct magnetic field lines between the permanent magnets indicates a magnetically conductive fit between them. This magnetically conductive fit between the soft magnet and the permanent magnet can be achieved in ways including, but not limited to, contact between them or the presence of a magnetic gap. A magnetic gap refers to a very short air gap between two magnetic materials (such as a soft magnet and a permanent magnet) in a magnetic circuit.

[0086] The soft magnet and the permanent magnet together enclose the movable space in the direction of motion around the moving iron core. When the moving iron core moves to the first position, at least part of its structure is located within the movable space.

[0087] In this embodiment, since the soft magnet conducts magnetic field lines between at least two permanent magnets, the permanent magnets can magnetize the soft magnet. Therefore, the permanent magnets can directly conduct magnetic field lines to the moving iron core 32, and also conduct magnetic field lines to the moving iron core 32 via the soft magnets. This creates a stable magnetic field environment around the moving iron core 32, reducing magnetic flux leakage. Because the magnetic holding assembly 35 uses a combination of soft and permanent magnets to provide magnetic holding force to the moving iron core 32, compared to using only permanent magnets, the soft magnets in this application reduce the amount of permanent magnet material used, thus lowering costs. Furthermore, the soft magnets themselves are non-magnetic, preventing assembly difficulties and low assembly accuracy due to excessive magnetic force during assembly, thereby improving assembly efficiency and installation accuracy.

[0088] For ease of understanding, the structure of the magnetic holding assembly 35 will be further described below, but this does not mean that the structure of the magnetic holding assembly 35 of this application is limited to this.

[0089] For example, combining Figure 3 As shown, in one embodiment of this application, the magnetic holding assembly 35 includes a first permanent magnet 351, a first soft magnet 352, a second permanent magnet 353, and a second soft magnet 354. Understandably, the first permanent magnet 351 and the second permanent magnet 353, as permanent magnets, are both made of permanent magnet materials. Specifically, the materials used for the first permanent magnet 351 and the second permanent magnet 353 include, but are not limited to, permanent magnet materials such as AlNiCo and ferrite. The materials used for the first permanent magnet 351 and the second permanent magnet 353 can also be rare earth permanent magnet materials such as Samarium Cobalt and Neodymium Iron Boron. The first soft magnet 352 and the second soft magnet 354, as soft magnets, are both made of soft magnet materials. Specifically, the materials used for the first soft magnet 352 and the second soft magnet 354 include, but are not limited to, electromagnetic pure iron or iron-silicon alloys.

[0090] Continue to combine Figure 3 As shown, the first permanent magnet 351, the first soft magnet 352, the second permanent magnet 353, and the second permanent magnet 353 are arranged sequentially around the direction of movement of the moving iron core 32, so as to jointly enclose and form an active space that can adapt to the movement needs of the moving iron core 32. That is, when the moving iron core 32 moves to the first position, at least part of its structure is located within the active space jointly enclosed by the soft magnet and the permanent magnet of the magnetic holding assembly 35. Figure 4As shown, with this configuration, the first permanent magnet 351 and the second permanent magnet 353 can magnetize the first soft magnet 352 and the second soft magnet 354 to form a stable magnetic field environment around the moving iron core 32. Since soft magnets have low magnetic reluctance, the first soft magnet 352 and the second soft magnet 354 can form a low magnetic reluctance channel between the first permanent magnet 351 and the second permanent magnet 353, converging and guiding the magnetic lines of force of the first permanent magnet 351 and the second permanent magnet 353 into the working air gap where the moving iron core 32 is located, reducing magnetic flux leakage. It should be noted that the working air gap refers to the gap between the moving iron core 32 and the stationary iron core 33, or the gap between the moving iron core 32 and the first wall 31a.

[0091] Since the first soft magnet 352 and the second soft magnet 354 are made of soft magnetic materials, their cost is lower than that of permanent magnet materials. Furthermore, the first soft magnet 352 and the second soft magnet 354 themselves do not possess magnetism, thus avoiding assembly difficulties and low assembly accuracy due to excessive magnetic force during assembly. Moreover, compared to related technologies that use a large number of permanent magnets to provide magnetic holding force for the moving iron core 32, the embodiment of this application uses the first soft magnet 352 and the second soft magnet 354 to gather and guide the magnetic lines of force of the first permanent magnet 351 and the second permanent magnet 353 into the working air gap where the moving iron core 32 is located. This reduces the number of permanent magnets required while maintaining magnetic flux density, thereby reducing costs, simplifying installation, and improving assembly efficiency and accuracy.

[0092] It should be noted that all permanent magnets in the magnetic holding assembly 35 can be located on the same plane perpendicular to the direction of movement of the moving iron core 32. In other words, the centers of gravity of all permanent magnets in the magnetic holding assembly 35 are located on the same plane, and this plane is perpendicular to the direction of movement of the moving iron core 32. This arrangement improves the uniformity of the magnetic field generated by the magnetic holding assembly 35 around the moving iron core 32 and also improves space utilization. Furthermore, all soft magnets in the magnetic holding assembly 35 can be configured to be located on the same plane as all permanent magnets. This structural arrangement not only has high space utilization but also improves magnetic field uniformity.

[0093] In some embodiments, the permanent magnets of the magnetic holding assembly 35 may not be disposed on the same plane. For example, some of the permanent magnets in the magnetic holding assembly 35 are arranged offset from other permanent magnets in the direction of movement of the moving iron core 32. In this way, the positions of the corresponding permanent magnets can be reasonably configured according to the internal space of the relay 100, so as to reduce assembly interference between structural components. Correspondingly, the soft magnets of the magnetic holding assembly 35 may also not be disposed on the same plane. In some embodiments, some of the soft magnets in the magnetic holding assembly 35 are arranged offset from other soft magnets in the direction of movement of the moving iron core 32. In some embodiments, at least one soft magnet of the magnetic holding assembly 35 is arranged offset from at least one permanent magnet in the direction of movement of the moving iron core 32. The placement of the permanent magnet and soft magnet in the magnetic holding assembly 35 in the direction of movement of the moving iron core 32 is not limited here, as long as the soft magnet and permanent magnet in the magnetic holding assembly 35 together enclose the moving iron core 32 in the direction of movement, and satisfy the requirement that when the moving iron core 32 is in the first position or the second position, the magnetic field environment jointly formed by the soft magnet and permanent magnet can provide magnetic holding force for the moving iron core 32.

[0094] In some embodiments, both the first permanent magnet 351 and the second permanent magnet 353 are in contact with the sidewall 31c or have a magnetic gap, so that in the first closed magnetic circuit 30a and the second closed magnetic circuit 30b, the first permanent magnet 351 and the second permanent magnet 353 can conduct magnetic lines of force to the moving iron core 32 through the sidewall 31c.

[0095] The above embodiments illustrate some embodiments of this application by taking the magnetic holding assembly 35, which includes two permanent magnets, a first permanent magnet 351 and a second permanent magnet 353, and two soft magnets, a first soft magnet 352 and a second soft magnet 354.

[0096] In the embodiments of this application, the positions of the permanent magnets and soft magnets can be varied. For example, in some embodiments, the magnetic holding assembly 35 includes two first magnets and two second magnets. In the direction perpendicular to the movement of the moving iron core 32, the two first magnets are spaced apart from each other, and at least a portion of the structure of at least one second magnet is located between the two first magnets. In the embodiments of this application, one of the first magnets and the second magnet is a soft magnet, and the other is a permanent magnet. That is, if the first magnet is a soft magnet, then the second magnet is a permanent magnet. In this case, the magnetic holding assembly 35 includes two soft magnets and two permanent magnets, and at least a portion of at least one permanent magnet is located between the two soft magnets. If the first magnet is a permanent magnet, then the second magnet is a soft magnet. In this case, the magnetic holding assembly 35 includes two soft magnets and two permanent magnets, and at least a portion of at least one soft magnet is located between the two permanent magnets. It is understood that, based on the need for the magnetic holding assembly 35 to form an integral magnetic circuit, the first magnets and the adjacent second magnets are in contact or have a magnetic gap.

[0097] For ease of understanding, the following explanation will be based on two examples: two first magnets, namely the first permanent magnet 351 and the second permanent magnet 353, and two second magnets, namely the first soft magnet 352 and the second soft magnet 354.

[0098] All permanent magnets in the magnetic holding assembly 35 have the same polarity facing the magnetic pole face at the center of the active space. For example, combined with Figure 3 As shown, the first permanent magnet 351 includes a first magnetic pole surface 3511, and the second permanent magnet 353 includes a second magnetic pole surface 3531. The first magnetic pole surface 3511 and the second magnetic pole surface 3531 are opposite to each other and have the same polarity, so that the direction of the magnetic field can be controlled, and the electromagnetic field generated by the coil 34 can be effectively superimposed or canceled.

[0099] The first permanent magnet 351 and the second permanent magnet 353 can be rectangular block structures, while the first soft magnet 352 and the second soft magnet 354 can be strip-shaped sheet structures. The shapes of the first permanent magnet 351, the second permanent magnet 353, the first soft magnet 352, and the second soft magnet 354 are not limited here, as long as they can meet the needs of the magnetic holding assembly 35 in providing magnetic holding force when the moving iron core 32 is in the first or second position.

[0100] There are several possibilities regarding the placement of the first permanent magnet 351, the second permanent magnet 353, the first soft magnet 352, and the second soft magnet 354.

[0101] For example, combining Figure 3 As shown, in some embodiments, at least one of the first soft magnet 352 and the second soft magnet 354 is located between the first magnetic pole surface 3511 and the second magnetic pole surface 3531. This improves the space utilization provided by the first magnetic pole surface 3511 and the second magnetic pole surface 3531, and the soft magnet positioned between them can better concentrate magnetic lines of force, reducing magnetic leakage.

[0102] The first soft magnet 352 is located between the first magnetic pole surface 3511 and the second magnetic pole surface 3531. One end of the first soft magnet 352 is in contact with the first magnetic pole surface 3511 or there is a magnetic gap there. The other end of the first soft magnet 352 is in contact with the second magnetic pole surface 3531 or there is a magnetic gap there.

[0103] It should be noted that when the first soft magnet 352 is in contact with the first magnetic pole surface 3511, there is no gap between them to reduce magnetic reluctance. Although the presence of a magnetic gap between the first soft magnet 352 and the first magnetic pole surface 3511 increases magnetic reluctance, this structural arrangement is beneficial for providing assembly allowance between the first soft magnet 352 and the first permanent magnet 351, thereby further reducing assembly difficulty and improving assembly efficiency.

[0104] Accordingly, when the first soft magnet 352 and the second magnetic pole surface 3531 are in contact, there is no gap between them to reduce magnetic reluctance. Although the presence of a magnetic gap between the first soft magnet 352 and the second magnetic pole surface 3531 increases magnetic reluctance, this structural arrangement is beneficial for providing assembly allowance between the first soft magnet 352 and the second permanent magnet 353 by utilizing the magnetic gap, thereby further reducing assembly difficulty and improving assembly efficiency.

[0105] In some embodiments, the first soft magnet 352 and the second soft magnet 354 are both located between the first magnetic pole surface 3511 and the second magnetic pole surface 3531. Therefore, the first soft magnet 352 and the second soft magnet 354 can fully utilize the space between the first magnetic pole surface 3511 and the second magnetic pole surface 3531, improving space utilization.

[0106] In this embodiment, one end of the second soft magnet 354 is in contact with or has a magnetic gap with the first magnetic pole surface 3511, and the other end of the second soft magnet 354 is in contact with or has a magnetic gap with the second magnetic pole surface 3531.

[0107] When the second soft magnet 354 contacts the first magnetic pole surface 3511, there is no gap between them to reduce magnetic reluctance. While a magnetic gap between the second soft magnet 354 and the first magnetic pole surface 3511 increases magnetic reluctance, this structural arrangement allows for assembly allowance between the second soft magnet 354 and the first permanent magnet 351, further reducing assembly difficulty and improving assembly efficiency.

[0108] Accordingly, when the second soft magnet 354 contacts the second magnetic pole surface 3531, there is no gap between them to reduce magnetic reluctance. While a magnetic gap between the second soft magnet 354 and the second magnetic pole surface 3531 increases magnetic reluctance, this structural arrangement allows for assembly allowance between the second soft magnet 354 and the second permanent magnet 353, further reducing assembly difficulty and improving assembly efficiency.

[0109] In some embodiments, the first soft magnet 352 or the second soft magnet 354 is not limited to being disposed between the first magnetic pole surface 3511 and the second magnetic pole surface 3531, but may also be disposed outside the region between the first magnetic pole surface 3511 and the second magnetic pole surface 3531.

[0110] For example, combining Figure 5As shown, the lengths of the first soft magnet 352 and the second soft magnet 354 are both greater than the distance between the first magnetic pole surface 3511 and the second magnetic pole surface 3531. Both the first magnetic pole surface 3511 and the second magnetic pole surface 3531 are located between the first soft magnet 352 and the second soft magnet 354. Thus, the first magnetic pole surface 3511 and the second magnetic pole surface 3531 can still be arranged around the periphery of the moving iron core 32, along with the first soft magnet 352 and the second soft magnet 354, to meet the requirement that the magnetic holding assembly 35 can hold the moving iron core 32 in either the first or second position.

[0111] The side of at least one of the first permanent magnet 351 and the second permanent magnet 353 is in contact with or has a magnetic gap with the first soft magnet 352, and the side of at least one of the first permanent magnet 351 and the second permanent magnet 353 is in contact with or has a magnetic gap with the second soft magnet 354.

[0112] Understandably, when two objects that can conduct magnetic field lines are in contact, magnetic resistance can be reduced; or when magnetic field lines are conducted through a magnetic gap between two objects, the magnetic gap can be used to provide assembly allowance, thereby reducing assembly difficulty.

[0113] To facilitate understanding, taking the first permanent magnet 351 and the first soft magnet 352 as an example, when the side of the first permanent magnet 351 is in contact with the first soft magnet 352, the magnetic resistance between them can be reduced. When a magnetic gap exists between the side of the first permanent magnet 351 and the first soft magnet 352, the magnetic gap can provide assembly allowance between them to avoid interference and thus reduce assembly difficulty.

[0114] It should be noted that the permanent magnets and soft magnets do not have to be regular rectangular strip structures, but can also be other irregular structures with protruding structures, thereby using such structures to improve the assembly stability between adjacent permanent magnets and soft magnets.

[0115] For example, combining Figure 6 As shown, in an embodiment where the magnetic holding assembly 35 includes a first permanent magnet 351, a first soft magnet 352, a second permanent magnet 353, and a second soft magnet 354, at least one of the first permanent magnet 351 and the second permanent magnet 353 is engaged with at least one of the first soft magnet 352 and the second soft magnet 354 to improve the connection stability between them.

[0116] For the magnetic holding assembly 35 in which the first permanent magnet 351, the first soft magnet 352, the second permanent magnet 353, and the second soft magnet 354 are arranged sequentially around the moving iron core 32 in the direction of movement, the ends of any two adjacent objects can be engaged in the manner described above to improve the connection stability between them; and this engagement arrangement can increase the magnetic conduction area between the two magnets, thereby improving the magnetic conduction efficiency and enhancing the electromagnetic power that drives the moving iron core 32 to move.

[0117] Combination Figure 6 As shown, the magnetic circuit portion 30 in this embodiment may include at least one of the following technical solutions:

[0118] In the first scenario, one of the first permanent magnet 351 and the first soft magnet 352 is provided with a first protrusion 352a, and the other is provided with a first groove 351a, with the first protrusion 352a and the first groove 351a engaging with each other.

[0119] In the second scenario, one of the second permanent magnet 353 and the second soft magnet 354 is provided with a second protrusion 354a, and the other is provided with a second groove 353a, with the second protrusion 354a and the second groove 353a engaging with each other.

[0120] In the third scenario, one of the first permanent magnet 351 and the second soft magnet 354 is provided with a third protrusion 354b, and the other is provided with a third groove 351b, with the third protrusion 354b and the third groove 351b engaging with each other.

[0121] In the fourth scenario, one of the second permanent magnet 353 and the first soft magnet 352 is provided with a fourth protrusion 352b, and the other is provided with a fourth groove 353b, with the fourth protrusion 352b and the fourth groove 353b engaging with each other.

[0122] In the above embodiments, whether it is between the first permanent magnet 351 and the first soft magnet 352, or between the first permanent magnet 351 and the second soft magnet 354, the aforementioned interlocking arrangement can improve the connection stability between them and increase the magnetic conductive area to improve magnetic conductivity. Correspondingly, whether it is between the second permanent magnet 353 and the first soft magnet 352, or between the second permanent magnet 353 and the second soft magnet 354, the aforementioned interlocking arrangement can improve the connection stability between them and increase the magnetic conductive area to improve magnetic conductivity.

[0123] It should be noted that the positions of the corresponding protrusions and grooves in the above embodiments are not limited. As long as the interlocking action between the corresponding protrusions and grooves can be used, the connection stability between the two magnets can be enhanced.

[0124] Understandably, for an interlocking structure, the reference object for the protrusion and groove is the reference plane of the structural component. A protrusion is the portion that extends beyond the reference plane, while a groove is the portion that is recessed relative to the reference plane. Therefore, a groove can be formed adjacent to the protrusion in the structural component; that is, a magnet may have both a groove and a protrusion simultaneously. Based on this, the interlocking of two magnets includes, but is not limited to, the protrusion of one magnet engaging with the groove of another magnet, and also includes the formation of a groove adjacent to the protrusion of one magnet to engage with the protrusion of the other magnet.

[0125] For ease of understanding, this example illustrates the situation where the first permanent magnet 351 and the second permanent magnet 353 have protrusions on their opposite sides, and grooves are formed at adjacent positions of the protrusions.

[0126] Combination Figure 7 As shown, the surface of the first permanent magnet 351 facing the second permanent magnet 353 has two protrusions. A first groove 351a and a third groove 351b are formed adjacent to the two protrusions, respectively. The first groove 351a engages with the first protrusion 352a, and the third groove 351b engages with the third protrusion 354b. At this time, one of the two protrusions of the first permanent magnet 351 is located in the recess adjacent to the first protrusion 352a, and the other is located in the recess adjacent to the third protrusion 354b. Thus, the first permanent magnet 351 engages with the first soft magnet 352, and the first permanent magnet 351 engages with the second soft magnet 354.

[0127] The interlocking structure between the two magnets is not limited to this. Furthermore, the structural shapes of the two permanent magnets and two soft magnets are not limited here. The structures of the first permanent magnet 351 and the second permanent magnet 353 can be the same or different. The structures of the first soft magnet 352 and the second soft magnet 354 can be the same or different. See here. Figure 6 and Figure 7 As shown, in some embodiments, the first permanent magnet 351 and the second permanent magnet 353 are arranged in a mirror image. In some embodiments, the first soft magnet 352 and the second soft magnet 354 are arranged in a mirror image. This mirror image arrangement can further improve the uniformity of the magnetic field, allowing the moving iron core 32 to move in a more uniform magnetic field, thus improving the stability of the moving iron core 32's movement.

[0128] In some embodiments, the first soft magnet 352 and the second soft magnet 354 may not be arranged in a mirror image. For example, combined with Figure 8 As shown, the first soft magnet 352 and the second soft magnet 354 have the same structure, and their outlines are asymmetrically arranged. Therefore, the first soft magnet 352 and the second soft magnet 354 are not mirror images of each other. For example, combined with... Figure 9As shown, the first soft magnet 352 and the second soft magnet 354 have different structures. These structural differences include, but are not limited to, differences in shape or size. Therefore, the first soft magnet 352 and the second soft magnet are not arranged in a mirror image.

[0129] Combination Figures 6 to 9 As shown, in some embodiments, the outer surface of at least one of the first permanent magnet 351 and the second permanent magnet 353 is flush with the side surfaces of the first soft magnet 352 and the second soft magnet 354. This arrangement avoids the formation of a convex structure, resulting in a regular overall shape, which facilitates the sliding assembly 35 to the second mounting portion 362.

[0130] Combination Figure 10 As shown, in some embodiments, at least one end of at least one second magnet 35b (e.g., at least one of a first soft magnet 352 and a second soft magnet 354) is provided with a stepped surface 352c, and the stepped surface 352c abuts against or has a magnetic gap with the corner of an adjacent first magnet 35a (e.g., at least one of a first permanent magnet 351 and a second permanent magnet 353). In this way, the cooperation between the stepped surface 352c and the corner can satisfy the magnetic conduction requirements between them, and at the same time enhance the assembly compactness and stability between them.

[0131] It should be noted that in some embodiments, a portion of the surface of the second magnet 35b is recessed to form a stepped surface 352c. Alternatively, it may be partially convex to form the stepped surface 352c. For example, in combination with... Figure 10 As shown, taking the first soft magnet 352 as an example, the first soft magnet 352 is provided with a first protrusion 352a. A stepped surface 352c is formed on the side of the first protrusion 352a facing the first permanent magnet 351, so that the stepped surface 352c abuts against the corner of the first permanent magnet 351. Alternatively, a magnetic gap is provided between the stepped surface 352c and the corner of the first permanent magnet 351.

[0132] In some embodiments, the magnetic holding assembly 35 is not limited to including two first magnets 35a and two second magnets 35b. For example, combined with Figure 11As shown, the magnetic holding assembly 35 includes two first magnets 35a and four second magnets 35b. In a direction perpendicular to the movement of the moving iron core 32, the two first magnets 35a are spaced apart from each other, and at least a portion of the structure of at least one second magnet 35b is located between the two first magnets 35a. One of the first magnets 35a and the second magnet 35b is a soft magnet, and the other is a permanent magnet. The first magnets 35a and the adjacent second magnets 35b are in contact or have magnetic gaps. This structural arrangement allows the magnetic holding assembly 35 to form a stable magnetic field environment around the moving iron core 32, reducing magnetic flux leakage. Furthermore, the use of soft magnets reduces the amount of permanent magnets required, thereby lowering material costs and improving assembly efficiency and installation accuracy.

[0133] In some embodiments, the cross-sectional shape of the second magnet 35b in the direction perpendicular to the movement of the moving iron core 32 is triangular, and the facing surfaces of the four second magnets 35b all face the center of the active space. In this embodiment, for the moving iron core 32 with a cylindrical outer peripheral surface, setting the cross-sectional shape of the second magnets 35b in the direction perpendicular to the movement of the moving iron core 32 to a triangular shape, and having the facing surfaces of the four second magnets 35b all face the center of the active space, helps the magnetic holding assembly 35 to form a uniform magnetic field environment around the moving iron core 32 in the direction of movement, thereby improving the movement stability of the moving iron core 32.

[0134] The cross-sectional shape of the four second magnets 35b in the direction perpendicular to the movement of the moving iron core 32 is a right triangle, and the inclined planes 35c of the four second magnets 35b are arranged in a parallelogram, thereby improving the utilization rate of the space around the moving iron core 32 and improving the uniformity of the magnetic field environment around the moving iron core 32, which is conducive to improving the movement stability of the moving iron core 32.

[0135] It should be noted that the inclined surfaces 35c of the four second magnets 35b are arranged in a parallelogram, which only indicates that the inclined surfaces 35c of the oppositely arranged second magnets 35b are parallel to each other, and is not limited to the four inclined surfaces 35c being adjacent to each other.

[0136] When the second magnet 35b is a permanent magnet, the inclined surface 35c of the four second magnets 35b constitutes one of the magnetic pole faces of the permanent magnet. In this embodiment, the four permanent magnets can also be configured such that the polarity of the magnetic pole faces of all permanent magnets in the magnetic holding assembly 35 facing the center of the active space is the same. In this case, the magnetic pole faces corresponding to the inclined surface 35c of the four second magnets 35b are all N poles, or all S poles. This structural arrangement allows the direction of the magnetic field generated by the magnetic holding assembly 35 to be controllable, achieving effective superposition or cancellation with the electromagnetic field generated by the coil 34.

[0137] It should be noted that the volume of each magnet in this application is not limited. In some embodiments of this application, while maintaining a suitable overall space occupied by the magnetic holding assembly 35, the dimensions of the permanent magnets and soft magnets are configured to meet the magnetic holding requirements. For example, in the magnetic holding assembly 35, the total volume of the permanent magnets is larger than the total volume of the soft magnets. By configuring the permanent magnets to be larger than the soft magnets, a larger magnetic flux can be obtained, thereby increasing the driving force acting on the moving iron core 32.

[0138] It should be noted that the parts of relay 100 not covered may be the same as or may be implemented using existing technology, and are not limited here.

[0139] For example, such as Figure 1 and Figure 2 As shown, in some embodiments, the relay 100 further includes an insulating cover 50, which is sealed to the yoke assembly 31. The insulating cover 50 may be made of ceramic and may be connected to the yoke assembly 31 by welding.

[0140] The insulating cover 50 is connected to the yoke assembly 31 to form an installation space. In some embodiments, two stationary contacts 11 are respectively disposed through the top wall of the insulating cover 50 and extend into the installation space. The moving contact 12 is connected to the insulating base 21, and both are located within the installation space. It should be noted that the installation space and the receiving space are separated by the first wall 31a. Since the push rod 22 is movably disposed through the first wall 31a, and both ends of the push rod 22 are connected to the insulating base 21 and the moving iron core 32, the movement of the moving iron core 32 within the receiving space can drive the insulating base 21 located within the installation space to move via the push rod 22, so that the insulating base 21, carrying the moving contact 12, contacts or separates from the two stationary contacts 11.

[0141] 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.

[0142] 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 magnetic circuit portion of a relay, characterized in that, The magnetic circuit portion includes: A yoke assembly that encloses and forms a receiving space; The moving iron core is movably disposed within the aforementioned receiving space; A stationary iron core is located within the receiving space, and the stationary iron core is opposite to the moving iron core in the direction of movement of the moving iron core; A coil is disposed within the receiving space and surrounds the periphery of the stationary iron core. The coil is used to drive the moving iron core to move to a first position or a second position within the receiving space. A magnetic holding assembly is disposed within the receiving space. The magnetic holding assembly and the coil are stacked together along the movement direction of the moving iron core. The magnetic holding assembly is used to provide magnetic holding force when the moving iron core is located in the first position or the second position. The magnetic holding assembly includes a soft magnet and at least two permanent magnets. The soft magnet is used to conduct magnetic lines of force between the at least two permanent magnets. The soft magnet and the permanent magnets together enclose an active space in the movement direction surrounding the moving iron core. When the moving iron core moves to the first position, at least a portion of its structure is located within the active space.

2. The magnetic circuit portion of the relay according to claim 1, characterized in that, The magnetic holding assembly includes two first magnets and four second magnets. In the direction of movement perpendicular to the moving iron core, the two first magnets are spaced apart from each other. At least a portion of the structure of at least one second magnet is located between the two first magnets. The first magnet and the second magnet are either soft magnets or permanent magnets. The first magnets and the adjacent second magnets are in contact or have magnetic gaps.

3. The magnetic circuit portion of the relay according to claim 2, characterized in that, The cross-sectional shape of the second magnet in the direction perpendicular to the movement of the moving iron core is triangular, and the opposing surfaces of the four second magnets all face the center of the active space.

4. The magnetic circuit portion of the relay according to claim 3, characterized in that, The cross-sectional shape of each of the four second magnets in the direction of movement perpendicular to the moving iron core is a right triangle, and the inclined surfaces of the four second magnets are arranged in a parallelogram.

5. The magnetic circuit portion of the relay according to claim 1, characterized in that, The magnetic holding assembly includes two first magnets and two second magnets. In the direction of movement perpendicular to the moving iron core, the two first magnets are spaced apart from each other. At least a portion of the structure of at least one second magnet is located between the two first magnets. The first magnet and the second magnet are respectively a soft magnet and a permanent magnet. The first magnet and the adjacent second magnet are in contact or have a magnetic gap.

6. The magnetic circuit portion of the relay according to claim 5, characterized in that, The two permanent magnets are a first permanent magnet and a second permanent magnet, and the two soft magnets are a first soft magnet and a second soft magnet. At least one of the first permanent magnet and the second permanent magnet is engaged with at least one of the first soft magnet and the second soft magnet.

7. The magnetic circuit portion of the relay according to claim 6, characterized in that, The magnetic circuit portion also includes at least one of the following technical solutions: One of the first permanent magnet and the first soft magnet is provided with a first protrusion, and the other is provided with a first groove, wherein the first protrusion and the first groove are engaged in a locking fit; Alternatively, one of the second permanent magnet and the second soft magnet is provided with a second protrusion, and the other is provided with a second groove, wherein the second protrusion and the second groove are engaged in a locking fit; Alternatively, one of the first permanent magnet and the second soft magnet may have a third protrusion, and the other may have a third groove, wherein the third protrusion and the third groove are engaged in a locking fit. Alternatively, one of the second permanent magnet and the first soft magnet may have a fourth protrusion, and the other may have a fourth groove, with the fourth protrusion engaging with the fourth groove.

8. The magnetic circuit portion of the relay according to claim 5, characterized in that, At least one of the outer surfaces of the second magnet is flush with the sides of the two first magnets.

9. The magnetic circuit portion of the relay according to claim 5, characterized in that, At least one end of the second magnet is provided with a stepped surface, and the stepped surface abuts against the corner of the adjacent first magnet or there is a magnetic gap therebetween.

10. The magnetic circuit portion of the relay according to claim 1, characterized in that, All the permanent magnets in the magnetic holding assembly have the same polarity facing the center of the active space.

11. The magnetic circuit portion of the relay according to any one of claims 1-10, characterized in that, In the magnetic holding assembly, the total volume of the permanent magnet is greater than the total volume of the soft magnet.

12. The magnetic circuit portion of the relay according to any one of claims 1-10, characterized in that, The yoke assembly includes a first wall, a second wall, and a side wall. The first wall is connected to the second wall through the side wall. In the direction of movement of the moving iron core, the first wall and the second wall are opposite each other. The receiving space is formed between the first wall and the second wall. The magnetic holding assembly is located between the first wall and the coil. The permanent magnets are all in contact with the side wall or have magnetic gaps. When the moving iron core is located in the first position, the magnetic holding assembly, the side wall, the first wall and the moving iron core form a first closed magnetic circuit, and the moving iron core is magnetized and magnetically attracted to the first wall under the action of the first closed magnetic circuit; When the moving iron core is in the second position, the magnetic holding assembly, the side wall, the second wall, the stationary iron core and the moving iron core form a second closed magnetic circuit. Under the action of the second closed magnetic circuit, the moving iron core is magnetized and magnetically attracted to the stationary iron core.

13. The magnetic circuit portion of the relay according to claim 12, characterized in that, The yoke assembly includes a yoke plate and a yoke cylinder. The yoke plate is connected to the inner wall of the yoke cylinder, the yoke plate forms the first wall, and the bottom wall of the yoke cylinder forms the second wall. Alternatively, the yoke assembly includes a yoke plate and a U-shaped yoke, the yoke plate being connected to both ends of the U-shaped yoke, the yoke plate forming the first wall, and the bottom wall of the U-shaped yoke forming the second wall; Alternatively, the yoke assembly includes a first yoke plate, a second yoke plate, and two side yoke plates. The two side yoke plates are spaced apart from each other and are connected between the first yoke plate and the second yoke plate. The first yoke plate forms the first wall, and the second yoke plate forms the second wall.

14. The magnetic circuit portion of the relay according to claim 12, characterized in that, The magnetic circuit section further includes a mounting frame, on which the magnetic holding assembly and the coil are spaced apart; wherein, the mounting frame includes a first mounting part and a second mounting part connected to each other, the first mounting part and the second mounting part being arranged along the movement direction of the moving iron core, the coil being wound on the first mounting part, and the magnetic holding assembly being mounted on the second mounting part; the mounting frame has a mounting hole that penetrates the first mounting part and the second mounting part, and at least a portion of the structure of the stationary iron core is disposed within the mounting hole; the moving iron core is movably disposed within the mounting hole.

15. A relay, characterized in that, Includes the magnetic circuit portion of the relay as described in any one of claims 1 to 14.

16. The relay according to claim 15, characterized in that, The relay further includes a contact portion and a pushing mechanism. The contact portion includes a stationary contact and a moving contact piece. The pushing mechanism includes an insulating base and a pushing rod. One end of the pushing rod is connected to the insulating base, and the other end is connected to the moving iron core. The moving contact piece is disposed on the insulating base. When the moving iron core is in the first position, the moving contact piece is in contact with the stationary contact. When the moving iron core is in the second position, the moving contact piece is separated from the stationary contact.

17. The relay according to claim 16, characterized in that, The relay also includes an elastic element disposed between the stationary iron core and the moving iron core. When the coil drives the moving iron core to move from the second position to the first position, the elastic element pushes the moving iron core to move towards the first position.

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