Magnetic circuit structure and relay
By installing convex buds on the yoke of the relay magnetic circuit structure and combining the design of permanent magnets and armatures, the problems of high assembly difficulty and low magnetic conductivity in the prior art are solved, and more efficient assembly and magnetic conduction effects are achieved, and the compact design of the relay is promoted.
Patent Information
- Application Number
- CN202510457378.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2025-06-27
AI Technical Summary
The existing relay magnetic circuit structure is difficult to assemble, with a large number of parts, and machining errors can easily lead to reduced magnetic conduction efficiency of the magnetic circuit and misalignment of parts.
A magnetic circuit structure is designed in which at least one piece of yoke is provided with convex buds, and the permanent magnet is in contact with the surface of the yoke without convex buds, and the armature avoids the convex buds and permanent magnets in the second direction to form a magnetic path.
It reduces assembly difficulty and number of parts, improves assembly efficiency and magnetic permeability efficiency, reduces the space occupied by the magnetic circuit, and realizes the compact and miniaturized design of the relay.
Smart Images
Figure CN120221331A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of electronic control devices, and more particularly, to a magnetic circuit structure and a relay. Background Art
[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 usually applied to an automatic control circuit. In fact, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays roles such as automatic regulation, safety protection, and circuit conversion in a circuit.
[0003] Relays in the related art include a magnetic circuit structure and a contact structure. The magnetic circuit structure includes two yokes, one permanent magnet, one magnetic conductive sheet, and one armature. During assembly, it is necessary to first install the two symmetrical yokes into the base, and then install the permanent magnet and the magnetic conductive sheet between the two yokes.
[0004] However, since there are many parts in the magnetic circuit assembly process, when installing the iron parts in the above-mentioned structural parts, they can only be picked up by hand with tweezers and placed into the base. Moreover, the yokes, magnetic conductive sheets, and permanent magnet parts paired for monostable or magnetic latching models are all different, which will cause difficulties in production management. At the same time, due to machining errors of the parts, the machining errors of the yokes, magnetic conductive sheets, and permanent magnets will amplify the preset clearance size between the three or will tighten the interference size between the three. It should be noted that the clearance fit after the clearance size is amplified will affect the magnetic conduction efficiency of the magnetic circuit, and the magnetic conductive sheet and the permanent magnet have no positioning, which easily causes the parts to move out of position; while the interference fit after the interference size is tightened easily causes the permanent magnet to be crushed by force, and it is difficult to rely on manual extrusion to install it in the middle of the base. Summary of the Invention
[0005] An embodiment of the present invention provides a magnetic circuit structure and a relay, and the magnetic circuit structure can reduce the assembly difficulty, simplify the assembly steps, and improve the assembly efficiency and assembly yield.
[0006] An embodiment of the present invention provides a magnetic circuit structure, including: two yokes, an armature, and a permanent magnet, wherein:
[0007] At least one of the yokes is provided with a convex bump on the side facing the other yoke. The convex bump has an end face on the side facing the other yoke, and the end face is disposed opposite to the other yoke to form a magnetic conduction path between the end face and the portion of the other yoke disposed opposite to the end face; the arrangement direction of the two yokes forms a first direction;
[0008] The permanent magnet is located between the two yokes and is in contact with the surface of one of the yokes where the convex bump is not provided, and the permanent magnet is disposed to avoid the convex bump;
[0009] The armature is located between the two yokes; along the length direction of the armature, one end of the armature is rotatably arranged relative to the yoke as a fixed fulcrum, and the other end of the armature is swingably arranged relative to the yoke; the armature avoids the convex burl and the permanent magnet in a second direction, and the second direction is perpendicular to the first direction and the length direction of the armature.
[0010] According to some embodiments of the present invention, both of the two yokes are provided with the convex burls, and the end surfaces of the convex burls in the two yokes are arranged opposite to each other.
[0011] According to some embodiments of the present invention, a gap is provided between the end surface and another piece of the yoke.
[0012] According to some embodiments of the present invention, the two yokes are arranged parallel and side by side along the first direction.
[0013] According to some embodiments of the present invention, the number of the convex burl provided on the yoke is one; the convex burl is located at one end of the yoke in a third direction, and the third direction is perpendicular to the first direction and the second direction.
[0014] According to some embodiments of the present invention, there are multiple bulges provided on the yoke; the multiple bulges are arranged at intervals along a third direction, and the third direction is perpendicular to the first direction and the second direction.
[0015] According to some embodiments of the present invention, the convex burl is a protruding structure formed by stamping the yoke;
[0016] Alternatively, the convex bract is a protruding structure provided on the surface of the yoke.
[0017] According to some embodiments of the present invention, in a plane perpendicular to the first direction, a cross-sectional shape of the protrusion structure is rectangular, trapezoidal or circular.
[0018] According to some embodiments of the present invention, the yoke has an upper region and a lower region, and the lower region and the upper region are arranged along the second direction; the convex burl is located in the lower region; the armature corresponds to the upper region, and the permanent magnet corresponds to the lower region.
[0019] According to some embodiments of the present invention, each of the yokes comprises two extending arms arranged opposite to each other and a connecting section connecting the two extending arms, wherein the connecting section cooperates with the two extending arms to form a U-shaped structure;
[0020] One end of the armature contacts an extension arm of the yoke through an arc-shaped contact surface and is rotatably arranged relative to the yoke, and the other end is swingably arranged relative to the other extension arm of the yoke;
[0021] The convex burr is arranged on the connecting section of the yoke iron;
[0022] The permanent magnet is placed between the two yoke irons and is in contact with the surface of the connecting section of one yoke iron where no convex burr is provided.
[0023] According to some embodiments of the present invention, the extension arm is provided with a convex portion, and the arc-shaped contact surface is formed on the surface of the convex portion facing the armature;
[0024] Alternatively, the armature is provided with a convex portion, and the arc-shaped contact surface is formed on the surface of the convex portion facing the yoke iron.
[0025] An embodiment of the present invention provides a relay, and the relay includes a magnetic circuit structure provided by any technical solution in the above first aspect.
[0026] One embodiment of the above invention has at least the following advantages or beneficial effects:
[0027] 1. When assembling the magnetic circuit structure provided in the present application, it is only necessary to attach the permanent magnet to the surface of one yoke iron, and the permanent magnet is arranged with a gap from the other yoke iron to isolate magnetism through the gap. Accordingly, since the permanent magnet is arranged with a gap from the other yoke iron, the assembly of the magnetic circuit structure in the present application does not depend on the forming tolerances of each structural member, and the manufacturing difficulty of parts can be reduced.
[0028] 2. In the magnetic circuit structure provided in the present application, there are two magnetic circuits. One is the magnetic circuit for maintaining or operating the state among the permanent magnet, the yoke iron and the armature, that is, the main circuit; the other is the magnetic circuit between the permanent magnet and the two yoke irons, and this magnetic circuit serves as a strengthening circuit. The convex burr in the present application can strengthen the magnetic flux magnitude from one yoke iron to the other yoke iron and increase the magnetic conduction efficiency. Accordingly, the magnetic circuit structure provided in the present application forms a magnetic conduction circuit by forming convex burrs on at least one yoke iron and cooperating with the permanent magnet to achieve the effect of a magnetic conduction sheet, which can reduce the number of parts in the magnetic circuit structure, simplify the assembly steps, reduce the assembly difficulty, and improve the assembly efficiency and assembly yield.
[0029] 3. The arrangement positions of the convex burr and the permanent magnet in the present application both avoid the armature in the second direction, which can reserve sufficient space for the armature to swing, and the protruding size and arrangement position of the convex burr can be designed independently according to requirements without being restricted by the armature to optimize the magnetic conduction effect. Accordingly, on the premise of meeting the requirements of the swinging space of the armature and the magnetic force of the permanent magnet, the two yoke irons in the present application can be arranged at intervals in the first direction, thereby further reducing the occupied space of the magnetic circuit and realizing the compact and miniaturized design of the relay. Description of the Drawings
[0030] Figure 1Shown is an exploded structural schematic diagram of a relay provided by an embodiment of the present invention;
[0031] Figure 2 Shown is Figure 1 a structural schematic diagram after the structure in
[0032] Figures 3 to 6 Shown is a schematic diagram of the principle of use of a magnetic circuit structure provided by an embodiment of the present invention;
[0033] Figure 7 Shown is a three-dimensional structural schematic diagram of a magnetic circuit structure provided by an embodiment of the present invention;
[0034] Figure 8 Shown is Figure 7 an exploded schematic diagram of the magnetic circuit structure in
[0035] Figure 9 Shown is Figure 7 a three-dimensional schematic diagram of a partial structure in
[0036] Figure 10 Shown is Figure 9 a planar schematic diagram of the structure in
[0037] Figure 11 Shown is Figure 10 a cross-sectional view taken along A-A in
[0038] The description of the reference numerals is as follows:
[0039] 100, yoke; 110, convex bud; 200, armature; 300, permanent magnet; 400, coil holder; 500, coil; 600, mounting base; 700, contact assembly; 710, moving contact member; 711, moving contact support; 712, moving contact piece; 720, stationary contact member. Detailed implementation manners
[0040] Now, example embodiments will be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed descriptions will be omitted.
[0041] An embodiment of the present application provides a relay. The relay provided by the embodiment of the present application can be applied to a starting voltage range of 50% to 70%. Please refer to Figure 1 and Figure 2The structure shown, the relay includes a magnetic circuit structure and a contact structure. Among them, the magnetic circuit structure includes a magnetic circuit component and a coil component. The magnetic circuit component includes a yoke 100, an armature 200, and a permanent magnet 300; the coil component includes a bobbin 400, a coil 500, and coil terminals. The coil 500 can also be called enameled wire, and the coil 500 is wound on the surface of the bobbin 400, and the coil terminals are connected to the coil 500. The armature 200 passes through the bobbin 400 from the through hole of the bobbin 400. Both the magnetic circuit component and the coil component are installed on the mounting base 600. The material of the permanent magnet 300 can be ferrite Y33.
[0042] As an example, such as Figure 1 and Figure 2 shown, the magnetic circuit component includes two yokes 100, and the armature 200 is placed between the two yokes 100. Along the length direction of the armature 200, one end of the armature 200 can rotate relative to the yoke 100 as a fixed fulcrum, and the other end can swing relative to the yoke 100, thereby driving the push card to drive the contact structure to act. When an excitation is applied to the coil 500, the armature 200 swings under the action of the yoke 100. When a monostable relay is used, when the excitation of the coil 500 is removed, the armature 200 swings reversely relying on the reed reaction force, so that it contacts the other yoke 100 and returns to the initial off state.
[0043] As an example, among them, the contact structure includes two groups of contact components 700. The two groups of contact components 700 are located on both sides of the armature 200 along the first direction. Among them, the specific structures of the two groups of contact components 700 can be the same or different. Taking the two groups of contact components 700 being the same as an example, each group of contact components 700 includes a moving contact member 710 and a static contact member 720. The moving contact member 710 includes a moving contact bracket 711 and a moving contact piece 712. The moving contact bracket 711 is inserted into the mounting base 600, and the moving contact piece 712 is installed on the moving contact bracket 711 and follows the movement of the armature 200; the static contact member 720 includes a static contact piece, and the static contact piece is installed on the mounting base 600, and the static contact piece forms a contact point with the moving contact piece 712. As an example, the moving contact piece 712 follows the movement of the armature 200 through a push card.
[0044] During the application process of the relay, such as Figure 3 shown, the two yokes 100 in the relay, one has an N-pole polarity and the other has an S-pole polarity. In the initial off state, the armature 200 has no magnetism, and the armature 200 is held in the off state by the permanent magnet 300. Along the length direction of the armature 200, one end contacts the yoke 100 with N-pole polarity, and the other end contacts the yoke 100 with S-pole polarity. Such as Figure 4As shown, when the coil 500 is energized, the armature 200 generates an N pole and an S pole through excitation. Specifically, when the armature 200 contacts one end of the yoke 100 with an N pole polarity, an N pole is generated, and when the armature 200 contacts one end of the yoke 100 with an S pole polarity, an S pole is generated. Due to the principle of like poles repelling each other, the repulsive force will drive the armature 200 to swing. As Figure 5 shown, the armature 200 continues to move by inertia in the middle state until the N pole end of the armature 200 attracts the opposite pole of the yoke 100 with an S pole polarity, and at the same time, the S pole end of the armature 200 attracts the opposite pole of the yoke 100 with an N pole polarity, accelerating the movement of the armature 200 and making the armature 200 in the position as Figure 6 shown, at this time, the contacts in the contact structure are closed in place.
[0045] It should be noted that the magnetic circuit structure in the relay provided by the embodiment of the present application can be the magnetic circuit structure in any of the following technical solutions.
[0046] The embodiment of the present application provides a magnetic circuit structure. Please refer to Figures 7 to 9 the structure shown. The magnetic circuit structure includes: two yokes 100, an armature 200, and a permanent magnet 300, where: at least one yoke 100 is provided with a convex bud 110 on the side facing the other yoke 100, the convex bud 110 has an end face on the side facing the other yoke 100, and the end face is disposed opposite to the other yoke 100 to form a magnetic conduction path between the end face and the part of the other yoke 100 disposed opposite to the end face; the arrangement direction of the two yokes 100 forms a first direction.
[0047] It can be understood that the structure opposite to the end face of the convex bud 110 can be the surface of the yoke 100 without the convex bud 110, or the structure opposite to the end face of the convex bud 110 can be the end face of the convex bud 110 on the other yoke 100.
[0048] Please refer to Figures 7 to 9 the structure shown. The armature 200 is located between the two yokes 100; along the length direction of the armature 200, one end of the armature 200 is rotatably arranged relative to the yoke 100 as a fixed fulcrum, and the other end of the armature 200 is swingably arranged relative to the yoke 100. Exemplarily, only one armature 200 is included in the embodiment of the present application, and the armature 200 is generally a flat plate structure, which is not only light in weight but also can save parts and reduce costs.
[0049] Please continue to refer to Figure 7In the structure shown, the permanent magnet 300 is located between two yokes 100 and contacts the surface of one yoke 100 without the raised bumps 110, and the permanent magnet 300 is arranged to avoid the raised bumps 100. It can be understood that the contact between the permanent magnet 300 and the yoke 100 is a surface-to-surface contact. The yoke 100 in contact with the permanent magnet 300 may or may not be provided with raised bumps 110, as long as it is ensured that the position where the yoke 100 contacts the permanent magnet 300 is the part without the raised bumps 110.
[0050] It should be noted that, as Figure 7 shown, the armature 200 avoids the raised bumps 110 and the permanent magnet 300 in the second direction, and this second direction is perpendicular to the first direction and the length direction of the armature 200.
[0051] It can be understood that, in order to more clearly understand the magnetic circuit structure provided by the embodiments of the present application, the first direction in each drawing is now marked as Y, and the second direction is marked as Z. When assembling the magnetic circuit structure provided by the embodiments of the present application, it is only necessary to attach the permanent magnet 300 to the surface of one yoke 100, and the permanent magnet 300 is arranged with a gap from the other yoke 100 to isolate the magnetic field through the gap. Accordingly, since the permanent magnet 300 is arranged with a gap from the other yoke 100, the assembly of the magnetic circuit structure in the embodiments of the present application does not depend on the forming tolerances of each structural member, and the manufacturing difficulty of the parts can be reduced.
[0052] Moreover, please refer to Figure 10 the structure shown. In the magnetic circuit structure provided by the embodiments of the present application, there are two magnetic circuits. One is the magnetic circuit for maintaining or operating states among the permanent magnet 300, the yoke 100, and the armature 200, that is, the main circuit; the other is the magnetic circuit between the permanent magnet 300 and the two yokes 100, and this magnetic circuit serves as a strengthening circuit. The raised bumps 110 in the embodiments of the present application can strengthen the magnetic flux magnitude from one yoke 100 to the other yoke 100 and increase the magnetic conduction efficiency.
[0053] It can be understood that the magnetic conduction path formed between the end face and the part of the other yoke 100 that is directly opposite to the end face serves as a part of the strengthening circuit.
[0054] It should be noted that the magnetic circuit structure provided by the embodiments of the present application forms a magnetic conduction circuit by forming raised bumps 110 on at least one yoke 100 and cooperating with the permanent magnet 300 to achieve the effect of a magnetic conduction sheet, which can reduce the number of parts in the magnetic circuit structure, simplify the assembly steps, reduce the assembly difficulty, and improve the assembly efficiency and assembly yield.
[0055] In addition, the convex bud 110 and the permanent magnet 300 in the embodiment of the present application are arranged in a position to avoid the armature 200 in the second direction Z, and sufficient space can be reserved for the armature 200 to swing, and the protruding size and the arrangement position of the convex bud 110 can be designed separately according to the needs without being restricted by the armature 200, so as to optimize the magnetic conductivity effect. Accordingly, under the premise of meeting the swing space of the armature 200 and the magnetic force requirements of the permanent magnet 300, compared with the magnetic circuit structure in the related art, the two yokes 100 in the embodiment of the present application can be arranged at a distance along the first direction Y, thereby further reducing the space occupied by the magnetic circuit and realizing a compact and miniaturized design of the relay.
[0056] For example, please continue to refer to the structure shown in 7, the two yokes 100 are arranged parallel and side by side along the first direction Y to increase the positive facing area of the two yokes 100, so as to reasonably arrange the convex 110. At this time, the first direction Y in the embodiment of the present application is roughly parallel to the thickness direction of the yoke 100, and the two yokes 100 can be spaced apart along the thickness direction thereof.
[0057] It is understandable that the second direction Z is substantially parallel to the height direction of the yoke 100. The opposite side of the two yokes 100 can be called the inner side. Accordingly, the armature 200 and the permanent magnet 300 are both placed on the inner side of the two yokes 100, and the convex bulge 110 is also arranged on the inner side of the two yokes 100.
[0058] It is worth noting that in the magnetic circuit structure provided in the embodiment of the present application, both yokes 100 may be provided with a convex 110, or only one yoke 100 may be provided with a convex 110. It is understandable that since the two yokes 100 are arranged side by side in the first direction Y, there is a certain distance between the two yokes 100 to place the armature 200 and the permanent magnet 300. At the position of the convex 110, the distance between the two adjacent yokes 100 is reduced or even eliminated. In other words, the end face is in contact with the other yoke 100; or, the end face is set with a gap between the other yoke 100.
[0059] When only one yoke 100 is selected to set the convex 110, the protruding size of the convex 110 in the first direction Y needs to be set larger to effectively reduce or eliminate the distance between the two yokes 100, and the details are not repeated here.
[0060] In one embodiment, please refer to Figures 9 to 10 In the structure shown, both yokes 100 are provided with a convex bulge 110 , and the end surfaces of the convex bulge 110 in the two yokes 100 are arranged opposite to each other.
[0061] It is worth noting that the end surface gap between the two convex bulges 110 is set as follows Figure 11There is a gap d greater than 0 between the end faces of the two convex protrusions 110 shown, so as to adjust the magnitude of the magnetic flux according to actual requirements. When the gap d between the end faces of the two convex protrusions 110 is small enough, the two convex protrusions 110 may be just in contact, and there is no contact force between them at this time. In addition, the gap d between the end faces of the two convex protrusions 110 cannot be too large to avoid the inability to form an effective magnetic conduction path and affect the magnetic conduction effect.
[0062] In the embodiment of the present application, there are various possible settings for the position of the convex protrusion 110, as long as the permanent magnet 300 can be effectively avoided. Among them, the "avoidance of the permanent magnet 300" means that the convex protrusion 110 and the permanent magnet 300 are not opposite in the first direction Y, and they do not affect each other in the second direction Z.
[0063] It should be noted that there is also a third direction as a direction reference standard in the relay provided by the embodiment of the present application, and this third direction is perpendicular to the first direction Y and the second direction Z. Now, the third direction in each drawing is marked with X. It can be understood that the third direction X is generally parallel to the length direction of the yoke 100.
[0064] As an example, as Figure 9 shown, the number of convex protrusions 110 provided on the yoke 100 is one; the convex protrusion 110 is located at one end of the yoke 100 in the third direction X. That is, the convex protrusion 110 and the permanent magnet 300 are arranged in a staggered manner in the third direction X to achieve avoidance. It should be noted that this structural setting is convenient for preparation and can reduce the preparation difficulty and cost. Further, the convex protrusion 110 is provided at one end of the yoke 100 away from the swinging side of the armature 200 in the third direction X to effectively avoid the armature 200.
[0065] Of course, compared with Figure 9 the position of the convex protrusion 110 shown, the setting position of the convex protrusion 110 can also be moved inward from the end of the yoke 100 along the third direction X to shorten the magnetic conduction distance and improve the magnetic conduction effect.
[0066] It should be understood that only one convex protrusion 110 is provided on each yoke 100 in the above example, and the convex protrusions 110 on the two yokes 100 are arranged opposite to each other. Of course, multiple convex protrusions 110 can also be provided on each yoke 100 according to requirements. For example, the number of convex protrusions 110 provided on each yoke 100 is multiple, and the multiple convex protrusions 110 are arranged at intervals along the third direction X. Among them, the convex protrusions 110 on each yoke 100 can be arranged opposite to the convex protrusions 110 on the other yoke 100 or arranged in a staggered manner with the convex protrusions 110 on the other yoke 100 in the third direction X.
[0067] Alternatively, only one yoke 100 can be selected to be provided with the protrusions 110. When only one yoke 100 is provided with the protrusions 110, the number of the protrusions 110 thereon can be one or more.
[0068] When preparing to form the protrusions 110, the protrusions 110 can be realized by various processes. In one embodiment, the protrusions 110 are raised structures formed by stamping the yoke 100, that is, the protrusions 110 and the yoke 100 are of an integral stamping structure. Exemplarily, the material of the yoke 100 can be selected as DT4E (electromagnetic pure iron) to facilitate stamping the protrusions 110 on the surface of the yoke 100.
[0069] Alternatively, the protrusions 110 are raised structures provided on the surface of the yoke 100. At this time, the protrusions 110 can be prepared on the surface of the yoke 100 by casting or cutting.
[0070] In the embodiment of the present application, the shape of the raised structure can be a convex platform or a raised column. Exemplarily, when forming the protrusions 110 by a stamping process, the protrusions 110 can be convex platforms to ensure the overall structural strength after stamping and avoid the yoke 100 from breaking at the stamping position. Alternatively, when forming the protrusions 110 by a cutting process, the protrusions 110 can be raised columns to facilitate reducing the cutting difficulty.
[0071] It can be understood that the shape of the protrusions 110 can be adjusted according to requirements to optimize the magnetic conduction area and improve the magnetic conduction effect. Exemplarily, in a plane perpendicular to the first direction Y, the cross-sectional shape of the raised structure is a rectangle, a trapezoid or a circle.
[0072] Taking the yoke 100 arranged relative to the ground as an example, the yoke 100 has an upper region and a lower region, and the lower region and the upper region are arranged along the second direction Z. In one embodiment, the armature 200 corresponds to the upper region of the yoke 100 along the second direction Z, the permanent magnet 300 corresponds to the lower region of the yoke 100 along the second direction Z; the protrusions 110 are located in the lower region of the yoke 100.
[0073] It can be understood that the upper region and the lower region refer to a certain range rather than a specific position. In the embodiment of the present application, the assembly position of the armature 200 corresponds to the upper region of the yoke 100, the assembly position of the permanent magnet 300 corresponds to the lower region of the yoke 100, and the protrusions 110 are provided in the lower region of the yoke 100.
[0074] It should be noted that in the embodiments of the present application, the convex bracts 110 are only provided in the lower region inside the yoke 100. This not only reserves the upper region for the swing of the armature 200, but also allows the protruding size and the setting position of the convex bracts 110 to be designed independently according to requirements without being restricted by the armature 200, so as to optimize the magnetic conduction effect. Accordingly, on the premise of meeting the swing space of the armature 200 and the magnetic force requirements of the permanent magnet 300, compared with the magnetic circuit structure in the related art, the two yokes 100 in the embodiments of the present application can be spaced along the thickness direction, thereby further reducing the occupied space of the magnetic circuit and realizing the compact and miniaturized design of the relay.
[0075] In one embodiment, each yoke 100 includes two opposite extending arms and a connecting section connecting the two extending arms. The connecting section and the two extending arms cooperate to form a U-shaped structure to reduce the weight of the yoke 100, thereby facilitating the lightweight design of the relay.
[0076] In the embodiments of the present application, one end of the armature 200 is in contact with one extending arm of the yoke 100 through an arc-shaped contact surface and is rotatably arranged relative to the yoke 100, and the other end is swingably arranged relative to the other extending arm of the yoke 100; the convex bracts 110 are arranged on the connecting section of the yoke 100; the permanent magnet 300 is placed between the two yokes 100 and is in contact with the surface of the connecting section of one yoke 100 without the convex bracts 110.
[0077] In one embodiment, the extending arm is provided with a convex portion, and the surface of the convex portion facing the armature 200 forms an arc-shaped contact surface; alternatively, the armature 200 is provided with a convex portion, and the surface of the convex portion facing the yoke 100 forms an arc-shaped contact surface.
[0078] Generally speaking, the magnetic circuit structure provided by the embodiments of the present application controls the size and presence or absence of the gap between the two yokes 100 to change the magnetic flux of the two yokes 100 respectively.
[0079] For example, in the monostable relay solution, when it is necessary to weaken the holding force of the permanent magnet 300 in the closed state, the magnetic isolation can be increased by adding a gap between the permanent magnet 300 and the yoke 100 to achieve the purpose of weakening the holding force on the yoke 100, and then adjust the release voltage of the monostable product. When the excitation voltage of the coil 500 is removed, the holding force on the yoke 100 is less than the reed reaction force, that is, the reed force is relied on to disconnect the contact. It can be understood that the greater the closing holding force, the smaller the release voltage.
[0080] Finally, it should be noted that: it can be understood that the various embodiments / embodiments provided by the present invention can be combined with each other without contradiction, and no further examples will be given here.
[0081] In the embodiments of the invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "plural" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the invention can be understood according to specific circumstances.
[0082] In the description of the embodiments of the invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the invention.
[0083] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0084] The above are only the preferred embodiments of the embodiments of the invention and are not used to limit the embodiments of the invention. For those skilled in the art, the embodiments of the invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the embodiments of the invention shall be included within the protection scope of the embodiments of the invention.
Claims
1. A magnetic circuit structure, characterized in that: include: Two yokes, an armature and a permanent magnet, of which: At least one of the yokes is provided with a convex burl on the side facing the other yoke, and the convex burl has an end face on the side facing the other yoke, and the end face is arranged opposite to the other yoke, so as to form a magnetic conductive path between the end face and a portion of the other yoke arranged opposite to the end face; the arrangement direction of the two yokes forms a first direction; The permanent magnet is located between the two yokes and contacts the surface of one yoke where the convex bulge is not provided, and the permanent magnet is provided to avoid the convex bulge; The armature is located between the two yokes; along the length direction of the armature, one end of the armature is rotatably arranged relative to the yoke as a fixed fulcrum, and the other end of the armature is swingably arranged relative to the yoke; the armature avoids the convex burl and the permanent magnet in a second direction, and the second direction is perpendicular to the first direction and the length direction of the armature.
2. The magnetic circuit structure according to claim 1, characterized in that: The two yokes are both provided with the convex blisters, and the end surfaces of the convex blisters in the two yokes are arranged opposite to each other.
3. The magnetic circuit structure according to claim 1 or 2, characterized in that: The end surface is spaced apart from another piece of the yoke.
4. The magnetic circuit structure according to claim 1 or 2, characterized in that: The two yokes are arranged parallel and side by side along the first direction.
5. The magnetic circuit structure according to claim 1 or 2, characterized in that: The number of the convex burl provided on the yoke is one; the convex burl is located at one end of the yoke in a third direction, and the third direction is perpendicular to the first direction and the second direction.
6. The magnetic circuit structure according to claim 1 or 2, characterized in that: There are multiple convex buds arranged on the yoke; the multiple convex buds are arranged at intervals along a third direction, and the third direction is perpendicular to the first direction and the second direction.
7. The magnetic circuit structure according to claim 1 or 2, characterized in that: The convex burl is a protruding structure formed by stamping the yoke iron; Alternatively, the convex bract is a protruding structure provided on the surface of the yoke.
8. The magnetic circuit structure according to claim 7, characterized in that: In a plane perpendicular to the first direction, a cross-sectional shape of the protrusion structure is rectangular, trapezoidal or circular.
9. The magnetic circuit structure according to claim 1 or 2, characterized in that: The yoke has an upper region and a lower region, and the lower region and the upper region are arranged along the second direction; the convex burl is located in the lower region; the armature corresponds to the upper region, and the permanent magnet corresponds to the lower region.
10. The magnetic circuit structure according to claim 9, characterized in that: Each of the yokes comprises two extending arms arranged opposite to each other and a connecting section connecting the two extending arms, wherein the connecting section cooperates with the two extending arms to form a U-shaped structure; One end of the armature contacts an extension arm of the yoke through an arc-shaped contact surface and is rotatably arranged relative to the yoke, and the other end is swingably arranged relative to the other extension arm of the yoke; The convex burl is arranged on the connecting section of the yoke; The permanent magnet is placed between the two yokes and is arranged in contact with the surface of the connecting section of one yoke where the convex burl is not arranged.
11. The magnetic circuit structure according to claim 10, characterized in that: The extension arm is provided with a convex portion, and a surface of the convex portion on one side facing the armature forms the arc-shaped contact surface; Alternatively, the armature is provided with a convex portion, and a surface of the convex portion on one side facing the yoke forms the arc-shaped contact surface.
12. A relay, characterized in that: Comprising the magnetic circuit structure as described in any one of claims 1-11.