Magnetic circuit structure and relay

Abstract

The application discloses a magnetic circuit structure and a relay. The magnetic circuit structure comprises a coil assembly and a yoke structure surrounding the coil assembly. The coil assembly is configured to move between a first position and a second position along an X-axis direction in response to an input signal. The coil assembly comprises a core and a winding wound around the outer periphery of the core. The winding is fixedly arranged opposite to the core. Permanent magnets fixedly connected with the yoke structure are arranged on both sides of the coil assembly along a Y-axis direction. The magnetic poles of the surfaces of the permanent magnets on both sides of the coil assembly facing each other in the Y-axis direction are the same. The Y-axis direction is perpendicular to the X-axis direction. During movement of the coil assembly between the first position and the second position, the orthographic projection of the winding and each permanent magnet on a first projection plane always has a first overlapping area. The first projection plane is perpendicular to the Y-axis direction.

Description

Technical Field

[0001] This application relates to the field of electrical control device technology, and more specifically, to a magnetic circuit structure and a relay. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is 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 in circuits.

[0003] Magnetic latching relays, as a type of relay, have been widely used in smart grids, high-voltage battery management systems for new energy vehicles, industrial automation control, smart homes, and other fields, becoming a core component for achieving efficient and energy-saving circuit control. However, the switching speed of the moving parts in existing magnetic latching relays is not fast enough, and the overall reliability of the relay needs further improvement. Summary of the Invention

[0004] This application provides a magnetic circuit structure and a relay to improve the overall reliability of the relay.

[0005] The magnetic circuit structure of this application embodiment includes a coil assembly and a yoke structure surrounding the coil assembly. The coil assembly is configured to move between a first position and a second position along the X-axis in response to an input signal. The coil assembly includes a core and a winding wound around the outer periphery of the core. The winding is fixedly disposed relative to the core. The coil assembly has permanent magnets fixedly connected to the yoke structure on both sides along the Y-axis. The magnetic poles of the permanent magnets on both sides of the coil assembly along the Y-axis are the same on the surfaces facing each other in the Y-axis direction. The Y-axis direction is perpendicular to the X-axis direction. During the movement of the coil assembly between the first position and the second position, the winding and the orthographic projection of each permanent magnet on a first projection plane always have a first overlapping area, and the first projection plane is perpendicular to the Y-axis direction.

[0006] According to some embodiments of this application, the yoke structure includes a first yoke and a second yoke arranged opposite to each other along the X-axis direction, the coil assembly is movably located between the first yoke and the second yoke, and the core is provided with a pull-in portion at both ends along the X-axis direction, the pull-in portion at both ends of the core along the X-axis direction is defined as the first pull-in portion and the second pull-in portion respectively. When the coil assembly is in the first position, the first attracting part contacts and magnetically attracts the first yoke, and the second attracting part separates from the second yoke; when the coil assembly is in the second position, the second attracting part contacts and magnetically attracts the second yoke, and the first attracting part separates from the first yoke.

[0007] According to some embodiments of this application, when the coil assembly is in the first position, the second engaging portion and each of the permanent magnets generate a first attractive force for holding the coil assembly in the first position; When the coil assembly is in the second position, a second attraction force is generated between the first attraction portion and each of the permanent magnets to hold the coil assembly in the second position.

[0008] According to some embodiments of this application, when the coil assembly is located in the first position, the second attracting portion and the orthographic projection of each of the permanent magnets on the first projection surface have a second overlapping area; when the coil assembly is located in the second position, the first attracting portion and the orthographic projection of each of the permanent magnets on the first projection surface have a third overlapping area.

[0009] According to some embodiments of this application, when the coil assembly is located in the first position, there is no overlap between the first attracting portion and the orthographic projection of each of the permanent magnets on the first projection surface; when the coil assembly is located in the second position, there is no overlap between the second attracting portion and the orthographic projection of each of the permanent magnets on the first projection surface.

[0010] According to some embodiments of this application, the permanent magnet on one side of the coil assembly along the Y-axis has two first end faces arranged opposite to each other along the X-axis, and the permanent magnet on the other side of the coil assembly along the Y-axis has two second end faces arranged opposite to each other along the X-axis, with the two first end faces aligned with the two second end faces in the Y-axis direction.

[0011] According to some embodiments of this application, the permanent magnets on both sides of the coil assembly along the Y-axis direction are respectively defined as a first permanent magnet and a second permanent magnet. The first permanent magnet has two first end faces arranged opposite to each other along the X-axis direction, and the second permanent magnet has two second end faces arranged opposite to each other along the X-axis direction. When the coil assembly is in the first position, a portion of the second attraction part is located between the first permanent magnet and the second permanent magnet, and a portion of the second attraction part extends from the first end face of the first permanent magnet near the second yoke and the second end face of the second permanent magnet near the second yoke. When the coil assembly is in the second position, a portion of the first attraction part is located between the first permanent magnet and the second permanent magnet, and a portion of the first attraction part extends from the first end face of the first permanent magnet near the first yoke and the second end face of the second permanent magnet near the first yoke.

[0012] According to some embodiments of this application, each of the suction portions has a protruding portion at both ends along the Y-axis direction, and each of the protruding portions extends outward from the outer side of the core along the Y-axis direction.

[0013] According to some embodiments of this application, the yoke structure encloses a magnetic circuit space, and the coil assembly and each of the permanent magnets are located within the magnetic circuit space.

[0014] According to some embodiments of this application, the magnetization direction of each permanent magnet is parallel to the Y-axis direction.

[0015] According to some embodiments of this application, the permanent magnets of the coil assembly are symmetrically arranged on both sides along the Y-axis direction.

[0016] According to some embodiments of this application, the yoke structure includes two fifth yokes symmetrically arranged along the Y-axis direction. Each fifth yoke has a yoke body and a bent portion. The two ends of each yoke body along the X-axis direction are respectively connected to the bent portion, and each bent portion of each fifth yoke extends toward the other fifth yoke. The two bent portions corresponding to each other in the Y-axis direction are spaced apart. When the coil assembly is in the first position, one end of the core is magnetically attracted to the bent portion at one end of the two fifth yokes along the X-axis; when the coil assembly is in the second position, the other end of the core is magnetically attracted to the bent portion at the other end of the two fifth yokes along the X-axis.

[0017] According to some embodiments of this application, the core is provided with a suction portion at both ends along the X-axis direction. The suction portion is configured to magnetically attract the corresponding bending portion. Each bending portion and the corresponding suction portion have a fourth overlapping area on the orthographic projection of the second projection plane, and the second projection plane is perpendicular to the X-axis direction.

[0018] According to some embodiments of this application, the magnetic circuit structure further includes a limiting structure, which is in a limiting engagement with the coil assembly in the Y-axis direction.

[0019] The relays in this application include the magnetic circuit structure described in any of the above claims.

[0020] An embodiment of the above application has at least the following advantages or beneficial effects: The magnetic circuit structure and relay of this application embodiment, by designing the coil assembly as a movable part of the magnetic circuit structure, and during the movement of the coil assembly between the first position and the second position, there is always a first overlapping area between the orthographic projection of the winding and each permanent magnet on the first projection plane, so that when the coil assembly switches, the coil assembly is not only affected by the magnetic field lines generated by its own energization to perform the switching action, but is also subjected to the Lorentz force, so as to enhance the switching driving force of the coil assembly, which is beneficial to improve the switching speed of the coil assembly and improve the reliability of the magnetic circuit structure. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0022] Figure 1 This is a three-dimensional schematic diagram of the magnetic circuit structure according to an embodiment of this application.

[0023] Figure 2 yes Figure 1 A front view of the coil assembly in the first position.

[0024] Figure 3 yes Figure 1 The front view, with the coil assembly in the second position.

[0025] Figure 4 This is a schematic diagram of the magnetic circuit when the coil assembly in the magnetic circuit structure of an embodiment of this application is in the first position.

[0026] Figure 5 This is a schematic diagram of the magnetic circuit when the coil assembly in the magnetic circuit structure of an embodiment of this application is located in the second position.

[0027] Figure 6 This is a schematic diagram of the magnetic circuit in an embodiment of the present application, showing the coil assembly located at an intermediate position between the first position and the second position.

[0028] Figure 7 yes Figure 1 A schematic diagram of its breakdown.

[0029] Figure 8 This is an exploded view of the yoke structure according to another embodiment of this application.

[0030] Figure 9 This is an exploded view of the yoke structure of another embodiment of this application.

[0031] Figure 10This is a schematic diagram of the magnetic circuit structure of another embodiment of this application.

[0032] The reference numerals in the attached figures are explained as follows: 100. Coil assembly; 111. Core; 112. Winding; 112a. First winding section; 112b. Second winding section; 113. Engaging part; 113a. First engaging part; 113b. Second engaging part; 1131. Protruding part; 120. Yoke structure; 120a. Magnetic circuit space; 121. First yoke; 122. Second yoke; 123. Third yoke; 124. Fourth yoke; 125. L-shaped yoke; 1251. First part; 1252. Second part; 126. Cylindrical yoke; 127. Fifth yoke; 1271. Yoke body; 1272. Bending section; 130, permanent magnet; 130a, first permanent magnet; 130b, second permanent magnet; 131, first end face; 132, second end face. Detailed Implementation

[0033] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0034] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0035] For ease of explanation, the terms "X-axis direction," "Y-axis direction," and "Z-axis direction" are used in the specific embodiments of this application. These terms simply refer to a feature having one of these directions being perpendicular to a feature having the other direction; they do not require implementation according to the "X-axis direction," "Y-axis direction," and "Z-axis direction" described in the embodiments. In the embodiments, the X-axis direction, Y-axis direction, and Z-axis direction are mutually perpendicular.

[0036] Unless otherwise specified, the terms “first,” “second,” or “third,” etc., in the claims and description are used to distinguish different objects and not to describe a particular order.

[0037] Unless otherwise specified, in the claims and description, the terms “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “rear,” “left,” “right,” etc., indicate the orientation or positional relationship based on the orientation and positional relationship shown in the drawings, and are only for the purpose of simplifying the description, and do not imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation.

[0038] like Figures 1 to 3 As shown, the magnetic circuit structure of this embodiment includes a coil assembly 100 and a yoke structure 120 surrounding the coil assembly 100. The yoke structure 120 forms a magnetic circuit space 120a, and the coil assembly 100 is located within the magnetic circuit space 120a. The coil assembly 100 is configured to move between a first position and a second position along the X-axis in response to an input signal. The coil assembly 100 includes a core 111 and a winding 112 wound around the outer periphery of the core 111. The winding 112 is fixedly disposed relative to the core 111. Permanent magnets 130 fixedly connected to the yoke structure 120 are respectively provided on both sides of the coil assembly 100 along the Y-axis, and each permanent magnet 130 is located within the magnetic circuit space 120a. The permanent magnets 130 on both sides of the coil assembly 100 along the Y-axis have the same magnetic poles on their surfaces facing each other in the Y-axis direction; during the movement of the coil assembly 100 between the first position and the second position, the winding 112 and the orthographic projection of each permanent magnet 130 on a first projection plane always have a first overlapping area, and the first projection plane is perpendicular to the Y-axis direction.

[0039] For ease of explanation, the permanent magnets 130 on both sides of the coil assembly 100 along the Y-axis are defined as the first permanent magnet 130a and the second permanent magnet 130b, respectively. The first permanent magnet 130a is located above the coil assembly 100, and the second permanent magnet 130b is located below the coil assembly 100.

[0040] The yoke structure 120 includes a first yoke 121 and a second yoke 122 arranged opposite to each other along the X-axis direction. The coil assembly 100 is movably located between the first yoke 121 and the second yoke 122. The core 111 is provided with a pull-in portion 113 at both ends along the X-axis direction. The pull-in portions 113 at both ends of the core 111 along the X-axis direction are respectively defined as the first pull-in portion 113a and the second pull-in portion 113b.

[0041] When the coil assembly 100 is in the first position, the first attracting part 113a contacts and magnetically attracts the first yoke 121, and the second attracting part 113b separates from the second yoke 122; when the coil assembly 100 is in the second position, the second attracting part 113b contacts and magnetically attracts the second yoke 122, and the first attracting part 113a separates from the first yoke 121.

[0042] During the movement of the coil assembly 100 between the first position and the second position, the orthographic projections of the winding 112 and the first permanent magnet 130a on the first projection plane always have a first overlapping area, and the orthographic projections of the winding 112 and the second permanent magnet 130b on the first projection plane always have a first overlapping area.

[0043] like Figure 4 As shown, taking the example that the magnetic poles of the surfaces of the first permanent magnet 130a and the second permanent magnet 130b facing each other in the Y-axis direction are both N poles, when the coil assembly 100 is in the first position, the first permanent magnet 130a and the second permanent magnet 130b act as magnetic sources. The magnetic field lines generated by the first permanent magnet 130a and the second permanent magnet 130b can flow back along the core 111 and the yoke structure 120 of the coil assembly 100 to the S poles of the first permanent magnet 130a and the second permanent magnet 130b to form a closed magnetic circuit, so that the first attracting part 113a contacts and magnetically attracts the first yoke 121. The magnetic field lines generated by the first permanent magnet 130a and the second permanent magnet 130b can maintain the coil assembly 100 in the first position.

[0044] like Figure 5 As shown, in order to facilitate the explanation of the energizing direction of the winding 112, the portion of the winding 112 located between the core 111 and the first permanent magnet 130a is defined as the first winding portion 112a, and the portion of the winding 112 located between the core 111 and the second permanent magnet 130b is defined as the second winding portion 112b.

[0045] When the winding 112 of the coil assembly 100 is energized (the energizing direction of the first winding portion 112a is ·, and the energizing direction of the second winding portion 112b is ×), the magnetic field lines generated by the coil assembly 100 are coupled with the magnetic field lines generated by the first permanent magnet 130a and the second permanent magnet 130b. The magnetic field lines generated by the energized coil assembly 100 are opposite to the magnetic field lines of the first attraction portion 113a, and the magnetic field lines generated by the energized coil assembly 100 are the same as the magnetic field lines of the second attraction portion 113b. This causes the attraction force between the first attraction portion 113a and the first yoke 121 to be gradually weakened by the magnetic field lines generated by the coil assembly 100, while the attraction force between the second attraction portion 113b and the second yoke 122 is gradually strengthened by the magnetic field lines generated by the coil assembly 100. As a result, the holding force of the coil assembly 100 in the first position decreases rapidly. As the coil assembly 100 begins to move from the first position to the second position, the gap between the first engaging part 113a and the first yoke 121 gradually increases, and the attractive force between them gradually decreases. Conversely, the gap between the second engaging part 113b and the second yoke 122 gradually decreases, and the attractive force between them gradually increases. With the attractive force on the coil assembly 100 exhibiting a "one increasing, one decreasing" trend, the driving force for the coil assembly 100's movement will rapidly increase, which is beneficial for improving the switching speed of the coil assembly 100.

[0046] Furthermore, the energizing direction of the first winding 112a is perpendicular to the paper and flows outwards from the paper, and the magnetic field lines generated by the first permanent magnet 130a are directed downwards. When the coil assembly 100 moves from the first position to the second position, according to the left-hand rule, the first winding 112a will be subjected to a horizontal rightward Lorentz force F1. The energizing direction of the second winding 112b is perpendicular to the paper and flows inwards from the paper, and the magnetic field lines generated by the second permanent magnet 130b are directed upwards. When the coil assembly 100 moves from the first position to the second position, according to the left-hand rule, the second winding 112b will be subjected to a horizontal rightward Lorentz force F2. It can be seen that under the combined action of the horizontal rightward Lorentz forces F1 and F2, the driving force of the coil assembly 100 can be further strengthened, further improving the switching speed of the coil assembly 100.

[0047] Therefore, in the magnetic circuit structure of this application embodiment, by designing the coil assembly 100 as a movable part of the magnetic circuit structure, and during the movement of the coil assembly 100 between the first position and the second position, the winding 112 and the orthographic projection of each permanent magnet 130 on the first projection plane always have a first overlapping area, so that when the coil assembly 100 switches, the coil assembly 100 is not only affected by the magnetic field lines generated by its own energization to perform the switching action, but is also subjected to the Lorentz force, so that the switching driving force of the coil assembly 100 is enhanced, which is beneficial to improve the switching speed of the coil assembly 100 and improve the reliability of the magnetic circuit structure.

[0048] like Figure 4 As shown, when the coil assembly 100 is in the first position, the second attraction part 113b and each permanent magnet 130 generate a first attraction force to hold the coil assembly 100 in the first position.

[0049] In an exemplary embodiment, the attraction force generated between the first permanent magnet 130a and the second attraction part 113b is defined as F3. Since the first permanent magnet 130a is fixedly connected to the yoke structure 120, the second attraction part 113b is equivalent to being subjected to an attraction force F3 in the upper left direction. The attraction force F3 can be decomposed into a first component force F31 in the vertical direction and a second component force F32 in the horizontal direction to the left. The second component force F32 can increase the holding force when the coil assembly 100 is in the first position.

[0050] The attraction force generated between the second permanent magnet 130b and the second attraction part 113b is defined as F4. Since the second permanent magnet 130b is fixedly connected to the yoke structure 120, the second attraction part 113b is equivalent to being subjected to an attraction force F4 in the lower left direction. The attraction force F4 can be decomposed into a third component force F41 that is vertically downward and a fourth component force F42 that is horizontally to the left. The fourth component force F42 can increase the holding force when the coil assembly 100 is in the first position.

[0051] Therefore, when the coil assembly 100 is in the first position, not only does the attraction between the first engaging portion 113a and the first yoke 121 provide a holding force for the coil assembly 100, but the attraction between the second engaging portion 113b and each permanent magnet 130 also provides a holding force for the coil assembly 100, resulting in a greater holding force on the coil assembly 100 and stronger resistance to impact. In other words, when the coil assembly 100 is in the first position, at least three magnetic pole faces are formed between the coil assembly 100, the yoke structure 120, and each permanent magnet 130. Although there is a gap between the second engaging portion 113b and each permanent magnet 130 when the coil assembly 100 is in the first position, an attraction force can still be generated between the second engaging portion 113b and each permanent magnet 130, further enhancing the holding force.

[0052] It should be added that, as can be seen from the above analysis, for the vertical (Y-axis) component force, the first component force F31 and the third component force F41 are in opposite directions. In this way, F31 and F41 can cancel each other out, thereby reducing the component force in the Y-axis direction that the coil assembly 100 as a whole experiences. This ensures that the coil assembly 100 is only subjected to the force in the X-axis direction and not to the component force in the Y-axis direction, thus ensuring the smoothness of the movement of the coil assembly 100 along the X-axis direction.

[0053] Similarly, such as Figure 5 As shown, when the coil assembly 100 is in the second position, a second attraction force is generated between the first attraction part 113a and each permanent magnet 130 to hold the coil assembly 100 in the second position.

[0054] In an exemplary embodiment, the attraction force generated between the first permanent magnet 130a and the first attraction part 113a is defined as F5. Since the first permanent magnet 130a is fixedly connected to the yoke structure 120, the first attraction part 113a is equivalent to being subjected to an attraction force F5 in the upper right direction. The attraction force F5 can be decomposed into a fifth component force F51 in the vertical direction and a sixth component force F52 in the horizontal direction to the right. The sixth component force F52 can increase the holding force when the coil assembly 100 is in the second position.

[0055] The attraction force generated between the second permanent magnet 130b and the first attraction part 113a is defined as F6. Since the second permanent magnet 130b is fixedly connected to the yoke structure 120, the first attraction part 113a is equivalent to being subjected to an attraction force F6 in the lower right direction. The attraction force F6 can be decomposed into a seventh component force F61 that is vertically downward and an eighth component force F62 that is horizontally to the right. The eighth component force F62 can increase the holding force when the coil assembly 100 is in the second position.

[0056] Therefore, when the coil assembly 100 is in the second position, not only can the attraction between the second engaging portion 113b and the second yoke 122 provide a holding force for the coil assembly 100, but the attraction between the first engaging portion 113a and each permanent magnet 130 can also provide a holding force for the coil assembly 100, resulting in a greater holding force on the coil assembly 100 and stronger resistance to impact. In other words, when the coil assembly 100 is in the second position, at least three magnetic pole faces are formed between the coil assembly 100, the yoke structure 120, and each permanent magnet 130. Although there is a gap between the first engaging portion 113a and each permanent magnet 130 when the coil assembly 100 is in the second position, an attraction can still be generated between the first engaging portion 113a and each permanent magnet 130, further enhancing the holding force.

[0057] It should be added that, as can be seen from the above analysis, for the vertical (Y-axis) component force, the fifth component force F51 and the seventh component force F61 are in opposite directions. In this way, F51 and F61 can cancel each other out, thereby reducing the component force in the Y-axis direction that the coil assembly 100 as a whole experiences. This ensures that the coil assembly 100 is only subjected to the force in the X-axis direction and not to the component force in the Y-axis direction, thus ensuring the smoothness of the movement of the coil assembly 100 along the X-axis direction.

[0058] In addition, it should be noted that, such as Figure 4 and Figure 5 As shown, when the coil assembly 100 moves from the first position to the second position, the gap between the first attracting part 113a and each permanent magnet 130 gradually decreases, while the gap between the second attracting part 113b and each permanent magnet 130 gradually increases. This causes the attraction force between the first attracting part 113a and each permanent magnet 130 to gradually increase, while the gap between the second attracting part 113b and each permanent magnet 130 gradually decreases. Therefore, the attraction force of each permanent magnet 130 on the coil assembly 100 as a whole shows a "one increases and one decreases" trend, which further enhances the driving force on the coil assembly 100 and further improves the switching speed of the coil assembly 100.

[0059] Therefore, when the coil assembly 100 of this embodiment switches, the attraction between the attraction part 113 and the yoke structure 120 provides a first driving force, the attraction between the attraction part 113 and the permanent magnet 130 provides a second driving force, and the Lorentz force on the winding 112 provides a third driving force. Under the combined action of the three driving forces, the switching speed of the coil assembly 100 is significantly improved.

[0060] like Figure 6 As shown, when the winding 112 of the coil assembly 100 is negatively energized, the coil assembly 100 moves from the first position to the second position. An attractive force is formed between the first engaging portion 113a and each permanent magnet 130, and the component of this attractive force along the X-axis helps drive the coil assembly 100 to move to the right. Simultaneously, a repulsive force is formed between the second engaging portion 113b and each permanent magnet 130, and the separation of this repulsive force along the X-axis helps drive the coil assembly 100 to move to the right. Therefore, during the switching of the coil assembly 100, the coil assembly 100 is simultaneously subjected to both repulsive and attractive forces in the same direction, further accelerating the switching speed of the coil assembly 100.

[0061] In one embodiment, the permanent magnets 130 on both sides of the coil assembly 100 are arranged symmetrically along the Y-axis.

[0062] In this embodiment, by symmetrically arranging the permanent magnets 130 on both sides of the coil assembly 100 along the Y-axis direction, the attractive forces generated by the first permanent magnet 130a and the second permanent magnet 130b on the coil assembly 100 in the Y-axis direction are equal. This makes the upward vertical force exerted by the first permanent magnet 130a on the coil assembly 100 cancel each other out with the downward vertical force exerted by the second permanent magnet 130b on the coil assembly 100, ensuring that the coil assembly 100 is only subjected to the force in the X-axis direction during movement, and not to the force in the Y-axis direction.

[0063] In one example, the magnetic circuit structure also includes a limiting structure (not shown in the figure), which engages with the coil assembly 100 in the Y-axis direction. By setting the limiting structure, the coil assembly 100 is prevented from wobbling along the Y-axis, ensuring that the coil assembly 100 can move smoothly along the X-axis without biasing.

[0064] like Figure 2 and Figure 3 As shown, when the coil assembly 100 is in the first position, the second attracting part 113b and the orthographic projection of each permanent magnet 130 on a first projection plane have a second overlapping area; when the coil assembly 100 is in the second position, the first attracting part 113a and the orthographic projection of each permanent magnet 130 on the first projection plane have a third overlapping area, and the first projection plane is perpendicular to the Y-axis direction.

[0065] In this embodiment, when the coil assembly 100 is in the first position, by designing the orthographic projections of the second attracting portion 113b and each permanent magnet 130 on the first projection plane to have a second overlapping region, the gap between the second attracting portion 113b and each permanent magnet 130 can be minimized, increasing the attraction between the second attracting portion 113b and the permanent magnet 130, improving the holding force of the coil assembly 100 when it is in the first position, and enhancing the impact resistance of the magnetic circuit structure. Similarly, when the coil assembly 100 is in the second position, by designing the orthographic projections of the first attracting portion 113a and each permanent magnet 130 on the first projection plane to have a third overlapping region, the gap between the first attracting portion 113a and each permanent magnet 130 can be minimized, increasing the attraction between the first attracting portion 113a and the permanent magnet 130, improving the holding force of the coil assembly 100 when it is in the second position, and enhancing the impact resistance of the magnetic circuit structure.

[0066] Please continue reading. Figure 2 and Figure 3 When the coil assembly 100 is in the first position, there is no overlap between the first attraction part 113a and the orthographic projection of each permanent magnet 130 on the first projection plane; when the coil assembly 100 is in the second position, there is no overlap between the second attraction part 113b and the orthographic projection of each permanent magnet 130 on the first projection plane.

[0067] When the coil assembly 100 is in the first position, the attraction between the first attracting part 113a and each permanent magnet 130 is not conducive to increasing the holding force of the coil assembly 100. Therefore, in this embodiment, by designing the orthographic projections of the first attracting part 113a and each permanent magnet 130 on the first projection plane to have no overlapping area, the gap between the first attracting part 113a and each permanent magnet 130 is increased when the coil assembly 100 is in the first position, the attraction between the first attracting part 113a and each permanent magnet 130 is reduced, and the influence of the attraction between the first attracting part 113a and each permanent magnet 130 on the holding force of the coil assembly 100 is reduced. Similarly, by designing the orthographic projections of the second attraction part 113b and each permanent magnet 130 on the first projection plane to have no overlapping area, when the coil assembly 100 is in the second position, the gap between the second attraction part 113b and each permanent magnet 130 is increased, the attraction force between the second attraction part 113b and each permanent magnet 130 is reduced, and the influence of the attraction force between the second attraction part 113b and each permanent magnet 130 on the holding force of the coil assembly 100 is reduced.

[0068] like Figure 2 and Figure 3 As shown, the permanent magnet 130 on one side of the coil assembly 100 along the Y-axis has two first end faces 131 arranged opposite to each other along the X-axis, and the permanent magnet 130 on the other side of the coil assembly 100 along the Y-axis has two second end faces 132 arranged opposite to each other along the X-axis. The two first end faces 131 are aligned with the two second end faces 132 respectively in the Y-axis direction.

[0069] The first permanent magnet 130a has two first end faces 131 arranged opposite to each other along the X-axis, and the second permanent magnet 130b has two second end faces 132 arranged opposite to each other along the X-axis.

[0070] When the coil assembly 100 is in the first position, a portion of the second attraction part 113b is located between the first permanent magnet 130a and the second permanent magnet 130b, and a portion of the second attraction part 113b extends from the first end face 131 of the first permanent magnet 130a near the second yoke 122 and the second end face 132 of the second permanent magnet 130b near the second yoke 122. When the coil assembly 100 is in the second position, a portion of the first attraction part 113a is located between the first permanent magnet 130a and the second permanent magnet 130b, and a portion of the first attraction part 113a extends from the first end face 131 of the first permanent magnet 130a near the first yoke 121 and the second end face 132 of the second permanent magnet 130b near the first yoke 121.

[0071] It should be noted that, taking the attraction force F3 generated between the first permanent magnet 130a and the second attraction part 113b when the coil assembly 100 is in the first position as an example, since the magnetic field lines generated by the first permanent magnet 130a return to the S pole of the first permanent magnet 130a along a curved path after exiting from the N pole, the diffusion path of the magnetic field lines on both sides of the first permanent magnet 130a along the X-axis direction is arc-shaped. If the second attraction part 113b is to receive the attraction force F3 in the upper left direction provided by the first permanent magnet 130a, the second attraction part 113b needs to be arranged on the right edge of the first permanent magnet 130a. In this way, the arc-shaped magnetic field lines generated by the first permanent magnet 130a can pass through the second attraction part 113b, so that the direction of the attraction force F3 received by the second attraction part 113b is upper left.

[0072] Therefore, in this embodiment, when the coil assembly 100 is in the first position, by placing a portion of the second attraction portion 113b between the first permanent magnet 130a and the second permanent magnet 130b, and by having a portion of the second attraction portion 113b extend from the first end face 131 of the first permanent magnet 130a near the second yoke 122 and the second end face 132 of the second permanent magnet 130b near the second yoke 122, the second attraction portion 113b is located at the right edge of each permanent magnet, thereby causing the second attraction portion 113b to be subjected to an oblique attraction force.

[0073] Similarly, when the coil assembly 100 is in the second position, by placing a portion of the first attraction part 113a between the first permanent magnet 130a and the second permanent magnet 130b, and by having a portion of the first attraction part 113a extend from the first end face 131 of the first permanent magnet 130a near the first yoke 121 and the second end face 132 of the second permanent magnet 130b near the first yoke 121, the first attraction part 113a is located at the left edge of each permanent magnet 130, thereby causing the first attraction part 113a to be subjected to an oblique attraction force.

[0074] like Figure 2 and Figure 3 As shown, each suction part 113 has a protruding part 1131 at both ends along the Y-axis direction, and each protruding part 1131 extends out of the outer side of the core part 111 along the Y-axis direction. In other words, the shape of the two ends of the core part 111 along the X-axis direction forms a T-shaped structure.

[0075] In this embodiment, by providing protrusions 1131 at both ends of the attracting portion 113 along the Y-axis, the protrusions 1131 can be brought closer to the corresponding permanent magnets 130. Thus, when the coil assembly 100 is in the first or second position, the attraction between the attracting portion 113 and each permanent magnet 130 is greater, further increasing the overall holding force of the coil assembly 100. Furthermore, the protrusions 1131 extend along the Y-axis, forming a groove on the outer periphery of the core 111 to increase the winding space of the winding. In addition, a larger winding volume can increase the Lorentz force received, further improving the switching speed of the coil assembly 100.

[0076] In one embodiment, the magnetization direction of each permanent magnet 130 is parallel to the Y-axis direction.

[0077] like Figure 7 As shown, in one embodiment, the yoke structure 120 includes four yoke plates connected end-to-end to form a magnetic circuit space 120a. The four yoke plates are a first yoke 121, a second yoke 122, a third yoke 123, and a fourth yoke 124. The first yoke 121 and the second yoke 122 are spaced apart along the X-axis, and the third yoke 123 and the fourth yoke 124 are spaced apart along the Y-axis. A first permanent magnet 130a is fixedly connected to the surface of the third yoke 123 facing the magnetic circuit space 120a, and a second permanent magnet 130b is fixedly connected to the surface of the fourth yoke 124 facing the magnetic circuit space 120a.

[0078] like Figure 8 As shown, in a modified embodiment, the yoke structure 120 includes two L-shaped yokes 125, which are connected end-to-end to form a magnetic circuit space 120a. Each L-shaped yoke 125 includes a first part 1251 and a second part 1252, both of which are flat plate structures, and the first part 1251 and the second part 1252 are perpendicularly connected. The first parts 1251 of the two L-shaped yokes 125 are spaced apart along the X-axis and serve as the first yoke 121 and the second yoke 122, respectively. The second parts 1252 of the two L-shaped yokes 125 are spaced apart along the Y-axis, and the first permanent magnet 130a and the second permanent magnet 130b are fixedly connected to the surfaces of the two second parts 1252 facing each other.

[0079] Of course, the yoke structure 120 can also include a U-shaped yoke and a yoke plate. The U-shaped yoke includes a bottom and two sides, one end of which is connected to the bottom, and the other end of which is connected to the yoke plate, so that the U-shaped yoke and the yoke plate form a magnetic circuit space 120a. The yoke plate serves as one of the first yoke 121 and the second yoke 122, and the bottom of the U-shaped yoke serves as the other of the first yoke 121 and the second yoke 122. The first permanent magnet 130a and the second permanent magnet 130b are respectively fixedly connected to the surfaces of the two sides facing each other.

[0080] like Figure 9 As shown, in another modified embodiment, the yoke structure 120 includes a first yoke 121, a second yoke 122, and a cylindrical yoke 126. The cylindrical yoke 126 has openings at both ends, and the first yoke 121 and the second yoke 122 are respectively connected to the openings at both ends of the cylindrical yoke 126. A first permanent magnet 130a and a second permanent magnet 130b are fixedly connected to the inner wall surface of the cylindrical yoke 126 and are arranged opposite to each other along the Y-axis.

[0081] Among them, the cylindrical yoke 126 can be cylindrical, rectangular, etc.

[0082] like Figure 10 As shown, in another modified embodiment, the yoke structure 120 includes two fifth yokes 127 symmetrically arranged along the Y-axis, the two fifth yokes 127 forming a magnetic circuit space, and the coil assembly 100 is movably located between the two fifth yokes 127 along the X-axis.

[0083] Each fifth yoke 127 has a yoke body 1271 and a bent portion 1272. The bent portions 1272 are connected to both ends of each yoke body 1271 along the X-axis. Each bent portion 1272 of each fifth yoke 127 extends towards the other fifth yoke 127. Corresponding bent portions 1272 are spaced apart along the Y-axis; that is, the two bent portions 1272 on the left side of the two fifth yokes 127 are spaced apart along the Y-axis, and the two bent portions 1272 on the right side of the two fifth yokes 127 are spaced apart along the Y-axis. A permanent magnet 130 is provided on the side of each yoke body 1271 facing the other yoke body 1271.

[0084] When the coil assembly 100 is in the first position, the first attracting part 113a at one end of the core 111 magnetically attracts the bent part 1272 at one end of the two fifth yokes 127 along the X-axis direction; when the coil assembly 100 is in the second position, the second attracting part 113b at the other end of the core 111 magnetically attracts the bent part 1272 at the other end of the two fifth yokes 127 along the X-axis direction.

[0085] In one embodiment, each bent portion 1272 and its corresponding attracting portion have a fourth overlapping region on the orthographic projection of the second projection plane, which is perpendicular to the X-axis direction. Each attracting portion is configured to contact and magnetically attract the corresponding bent portion 1272.

[0086] In detail, when the coil assembly 100 is in the first position, the first attracting part 113a contacts and magnetically attracts the bent parts 1272 on the left side of the two fifth yokes 127; when the coil assembly 100 is in the second position, the second attracting part 113b contacts and magnetically attracts the bent parts 1272 on the right side of the two fifth yokes 127.

[0087] In another aspect, this application provides a relay that includes the magnetic circuit structure of any of the above embodiments.

[0088] In one embodiment, the relay is a magnetic latching relay.

[0089] In summary, the magnetic circuit structure and relay of the embodiments of this application have at least the following advantages and beneficial effects: The magnetic circuit structure and relay of this application embodiment, by designing the coil assembly 100 as a movable part of the magnetic circuit structure, and during the movement of the coil assembly 100 between the first position and the second position, the winding 112 and the orthographic projection of each permanent magnet 130 on the first projection plane always have a first overlapping area, so that when the coil assembly 100 switches, the coil assembly 100 is not only affected by the magnetic field lines generated by its own energization to perform the switching action, but is also subjected to the Lorentz force, so as to enhance the switching driving force of the coil assembly 100, which is beneficial to improve the switching speed of the coil assembly 100 and improve the reliability of the magnetic circuit structure.

[0090] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0091] In the embodiments of this application, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0092] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A magnetic circuit structure, characterized in that, The device includes a coil assembly and a yoke structure surrounding the coil assembly. The coil assembly is configured to move between a first position and a second position along the X-axis in response to an input signal. The coil assembly includes a core and a winding wound around the outer periphery of the core, the winding being fixed relative to the core. The coil assembly has permanent magnets fixedly connected to the yoke structure on both sides along the Y-axis. The magnetic poles of the permanent magnets on both sides of the coil assembly along the Y-axis are the same on the surfaces facing each other in the Y-axis direction. The Y-axis direction is perpendicular to the X-axis direction. During the movement of the coil assembly between the first position and the second position, the winding and the orthographic projection of each permanent magnet on a first projection plane always have a first overlapping area, and the first projection plane is perpendicular to the Y-axis direction.

2. The magnetic circuit structure according to claim 1, characterized in that, The yoke structure includes a first yoke and a second yoke arranged opposite to each other along the X-axis direction. The coil assembly is movably located between the first yoke and the second yoke. The core is provided with a pull-in portion at both ends along the X-axis direction. The pull-in portions at both ends of the core along the X-axis direction are respectively defined as the first pull-in portion and the second pull-in portion. When the coil assembly is in the first position, the first attracting part contacts and magnetically attracts the first yoke, and the second attracting part separates from the second yoke; when the coil assembly is in the second position, the second attracting part contacts and magnetically attracts the second yoke, and the first attracting part separates from the first yoke.

3. The magnetic circuit structure according to claim 2, characterized in that, When the coil assembly is in the first position, the second attraction portion and each of the permanent magnets generate a first attraction force to hold the coil assembly in the first position. When the coil assembly is in the second position, a second attraction force is generated between the first attraction portion and each of the permanent magnets to hold the coil assembly in the second position.

4. The magnetic circuit structure according to claim 3, characterized in that, When the coil assembly is located in the first position, the second attracting part and the orthographic projection of each of the permanent magnets on the first projection surface have a second overlapping area; when the coil assembly is located in the second position, the first attracting part and the orthographic projection of each of the permanent magnets on the first projection surface have a third overlapping area.

5. The magnetic circuit structure according to claim 4, characterized in that, When the coil assembly is located in the first position, there is no overlap between the first attraction portion and the orthographic projection of each permanent magnet on the first projection surface; when the coil assembly is located in the second position, there is no overlap between the second attraction portion and the orthographic projection of each permanent magnet on the first projection surface.

6. The magnetic circuit structure according to claim 2, characterized in that, The permanent magnet on one side of the coil assembly along the Y-axis has two first end faces arranged opposite to each other along the X-axis, and the permanent magnet on the other side of the coil assembly along the Y-axis has two second end faces arranged opposite to each other along the X-axis. The two first end faces are respectively aligned with the two second end faces in the Y-axis direction.

7. The magnetic circuit structure according to claim 6, characterized in that, The permanent magnets on both sides of the coil assembly along the Y-axis are defined as a first permanent magnet and a second permanent magnet, respectively. The first permanent magnet has two first end faces arranged opposite to each other along the X-axis, and the second permanent magnet has two second end faces arranged opposite to each other along the X-axis. When the coil assembly is in the first position, a portion of the second attraction part is located between the first permanent magnet and the second permanent magnet, and a portion of the second attraction part extends from the first end face of the first permanent magnet near the second yoke and the second end face of the second permanent magnet near the second yoke. When the coil assembly is in the second position, a portion of the first attraction part is located between the first permanent magnet and the second permanent magnet, and a portion of the first attraction part extends from the first end face of the first permanent magnet near the first yoke and the second end face of the second permanent magnet near the first yoke.

8. The magnetic circuit structure according to claim 2, characterized in that, Each of the suction parts has a protruding part at both ends along the Y-axis direction, and each of the protruding parts extends out of the outer side of the core along the Y-axis direction.

9. The magnetic circuit structure according to claim 1, characterized in that, The yoke structure encloses a magnetic circuit space, and the coil assembly and each of the permanent magnets are located within the magnetic circuit space.

10. The magnetic circuit structure according to claim 1, characterized in that, The magnetization direction of each permanent magnet is parallel to the Y-axis direction.

11. The magnetic circuit structure according to claim 1, characterized in that, The permanent magnets of the coil assembly are symmetrically arranged on both sides along the Y-axis.

12. The magnetic circuit structure according to claim 1, characterized in that, The yoke structure includes two fifth yokes symmetrically arranged along the Y-axis direction. Each fifth yoke has a yoke body and a bent portion. The two ends of each yoke body along the X-axis direction are respectively connected to the bent portion, and each bent portion of each fifth yoke extends towards the other fifth yoke. The two corresponding bent portions are spaced apart in the Y-axis direction. When the coil assembly is in the first position, one end of the core is magnetically attracted to the bent portion at one end of the two fifth yokes along the X-axis; when the coil assembly is in the second position, the other end of the core is magnetically attracted to the bent portion at the other end of the two fifth yokes along the X-axis.

13. The magnetic circuit structure according to claim 12, characterized in that, The core is provided with a suction part at each end along the X-axis direction. The suction part is configured to magnetically attract the corresponding bending part. Each bending part and the corresponding suction part have a fourth overlapping area in the orthographic projection on the second projection plane. The second projection plane is perpendicular to the X-axis direction.

14. The magnetic circuit structure according to claim 1, characterized in that, The magnetic circuit structure also includes a limiting structure, which is in a limiting engagement with the coil assembly in the Y-axis direction.

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

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