Hinge-type bistable magnetic circuit structure and magnetic latching relay

Abstract

A hinge-type bistable magnetic circuit structure and a magnetic latching relay are provided, which include a coil (1), an L-shaped armature (2), an L-shaped yoke (3), and a permanent magnet (4). [Solution] The L-shaped armature (2) is arranged on the side of the L-shaped yoke (3) after rotating 180 degrees, and together they surround the outline of a frame shape. A predetermined first gap is provided at the connection point between the L-shaped armature (2) and the L-shaped yoke (3) at two opposing diagonals of the frame shape. The L-shaped yoke (3) has a first yoke part (31) and a second yoke part (32) formed in an L shape. The coil (1) is arranged on the first yoke part (31) of the L-shaped yoke (3). One end of the permanent magnet (4) is connected to the L-shaped yoke (3). The L-shaped armature (2) is connected to a first yoke portion (31) of an L-shaped yoke (3), and the L-shaped armature (2) has a first armature portion (21) and a second armature portion (22) formed in an L shape. The first armature portion (21) is disposed at the other end of the permanent magnet (4) and performs a seesaw motion, thereby forming a bistable magnetic circuit between the permanent magnet (4) and the L-shaped armature (2) and the L-shaped yoke (3), whose component structure is asymmetric. The bistable magnetic circuit is switched between two stable states by exciting the coil (4).

Description

[Technical field]

[0001] The present disclosure relates to the field of relay technology, and in particular to a hinge-type bistable magnetic circuit structure and a magnetic latching relay. [Background technology]

[0002] The bistable magnetic circuit structure adds a permanent magnet to the magnetic circuit structure, and uses the permanent magnet to form a bidirectional magnetic field circuit when the movable contact and fixed contact of the relay are in the open and closed states. The magnetic field circuit generates a holding force on the operation of a movable assembly such as an armature, and further realizes the open and closed holding states of the movable contact and fixed contact of the relay. The coil is excited only at the moment when the movable contact and fixed contact are opened and closed, and the coil does not require electrical holding, resulting in excellent energy saving effects.

[0003] FIG. 1 is a schematic diagram of a hinge-type bistable magnetic circuit structure in the prior art. As shown in FIG. 1, the hinge-type bistable magnetic circuit structure includes a coil bobbin 101, an enamel wire 102, an iron core 103, two yokes 104, and an armature portion 105. The enamel wire 102 is wound around the coil bobbin 101. The iron core 103 is attached to an iron core attachment hole of the coil bobbin 101. One end of each of the two yokes 104 is fixed to both ends of the iron core 103. The other end of each of the two yokes 104 is used to fit the armature portion 105. The armature portion 105 is a whole The hinge-type bistable magnetic circuit structure includes two armatures 106 and one permanent magnet, in which the permanent magnet is between the two armatures 106 and is covered in the plastic member 107, both ends of the two armatures 106 extend out of the plastic member 107 to form a U-shaped integral member, the other ends of the two yokes 104 are respectively disposed in the recesses on two sides of the U-shaped integral member, the middle of the armature part 105 is rotatable, and when the armature part 105 rotates, the armatures 106 extending from both sides of the armature part 105 hinge to the yoke 104. Such a hinge-type bistable magnetic circuit structure includes eight members except the coil, and in the assembly process, the yoke 104 and the iron core 103 need to be crimped, and the armature part 105 needs to be fully injected, so that the assembly and molding process of the entire magnetic circuit structure is relatively complicated. In addition, in order to ensure that the operating and resetting voltages are almost equal, the shock resistance capabilities of the movable contacts and fixed contacts of the relay in the open and closed states are almost the same, and the magnetic circuit structure is symmetrical, that is, the armature part 105 must be symmetrical, and the yoke 104 must also be symmetrical, which ensures that the force arms after energization of the coils on both sides during operating and resetting are the same, thereby ensuring that the rotational torque around the fulcrums on both sides during operating and resetting is the same. This resulted in a complex product structure, many parts, a complex processing process, high manufacturing costs, and complex assembly. Summary of the Invention [Problem to be solved by the invention]

[0004] The objective of the present disclosure is to overcome the deficiencies of the related art and provide a hinge-type bistable magnetic circuit structure and a magnetic latching relay, which improves the structure and not only reduces the number of parts but also reduces the processing process, resulting in simple product structure and processing technology, low manufacturing cost, and convenient assembly. [Means for solving the problem]

[0005] According to one aspect of the present disclosure, there is provided a hinge-type bistable magnetic circuit structure including a coil, an L-shaped armature, an L-shaped yoke, and a permanent magnet, the L-shaped armature being disposed on a side of the L-shaped yoke after rotating 180 degrees, and together surrounding a frame-shaped contour, and a predetermined first gap is provided at a connection point between the L-shaped armature and the L-shaped yoke at two opposing diagonals of the frame, the L-shaped yoke including a first yoke portion and a second yoke portion formed in an L shape, the coil being: The permanent magnet is disposed on a first yoke portion of an L-shaped yoke, one end of the permanent magnet is connected to the first yoke portion of the L-shaped yoke, and the L-shaped armature has a first armature portion and a second armature portion formed in an L shape, and the first armature portion is disposed on the other end of the permanent magnet and performs a seesaw-type motion, thereby forming a bistable magnetic circuit between the permanent magnet and the L-shaped armature and L-shaped yoke, which have an asymmetric component structure, and switching between two stable states of the bistable magnetic circuit is realized by exciting a coil.

[0006] According to an exemplary embodiment of the present disclosure, a first armature portion of the L-shaped armature and a first yoke portion of the L-shaped yoke are respectively located on two opposing sides of the frame shape, one end of the permanent magnet is vertically connected to the first yoke portion of the L-shaped yoke inside the frame shape surrounded by the L-shaped armature and the L-shaped yoke, and end faces at both ends of the permanent magnet are magnetic pole faces.

[0007] According to an exemplary embodiment of the present disclosure, an inner surface of an end of a first armature part of the L-shaped armature corresponds to an end face of a second yoke part of the L-shaped yoke, and an inner surface of an end of the first yoke part of the L-shaped yoke corresponds to an end face of the second armature part of the L-shaped armature.

[0008] According to an exemplary embodiment of the present disclosure, the bistable magnetic circuit comprises a first magnetic circuit passing through a permanent magnet, a portion of the first armature portion of the L-shaped armature, the second yoke portion of the L-shaped yoke, and a portion of the first yoke portion of the L-shaped yoke, and a second magnetic circuit passing through a permanent magnet, another portion of the first armature portion of the L-shaped armature, the second armature portion of the L-shaped armature, and another portion of the first yoke portion of the L-shaped yoke.

[0009] According to an exemplary embodiment of the present disclosure, in a bistable magnetic circuit, when an inner surface of an end of a first armature part of the L-shaped armature contacts an end face of a second yoke part of the L-shaped yoke and a first gap of one of two opposing diagonals of a frame shape is smaller than a first gap of the other diagonal, the L-shaped armature is in one stable state, and when an inner surface of an end of the first yoke part of the L-shaped yoke contacts an end face of the second armature part of the L-shaped armature and a first gap of the other of two opposing diagonals of a frame shape is smaller than the first gap of the one diagonal, the L-shaped armature is in another stable state.

[0010] According to an exemplary embodiment of the present disclosure, the permanent magnet is located between a central portion of a first yoke portion of the L-shaped yoke and a central portion of a first armature portion of the L-shaped armature.

[0011] According to an exemplary embodiment of the present disclosure, a length dimension of a first armature portion of the L-shaped armature is greater than a length dimension of a second armature portion of the L-shaped armature, and a length dimension of a first yoke portion of the L-shaped yoke is greater than a length dimension of a second yoke portion of the L-shaped yoke.

[0012] According to an exemplary embodiment of the present disclosure, the coil comprises a coil bobbin and an enameled wire wound around a winding window of the coil bobbin, a first yoke portion of the L-shaped yoke is attached to an iron core mounting hole of the coil bobbin, a permanent magnet mounting hole facing the first armature portion of the L-shaped armature is provided in a central portion of the winding window of the coil bobbin, the permanent magnet mounting hole communicates with the iron core mounting hole, and the permanent magnet is disposed in the permanent magnet mounting hole of the coil bobbin.

[0013] According to an exemplary embodiment of the present disclosure, the first armature portion of the L-shaped armature rockably cooperates with the L-shaped yoke with the other end of the permanent magnet serving as a rotational support point, thereby realizing a seesaw motion.

[0014] According to an exemplary embodiment of the present disclosure, a first convex portion is provided protruding from an end face of the other end of the permanent magnet, the first convex portion being molded integrally with the permanent magnet, and the first convex portion of the permanent magnet abuts against an inner surface of a first armature portion of the L-shaped armature, whereby the first armature portion of the L-shaped armature cooperates with the L-shaped yoke to be able to swing with the other end of the permanent magnet as a rotational support point.

[0015] According to an exemplary embodiment of the present disclosure, a second convex portion is provided protruding from an inner surface of a first armature portion of the L-shaped armature, and the second convex portion is molded integrally with the first armature portion. The second convex portion of the first armature portion of the L-shaped armature abuts against an end face of the other end of the permanent magnet, whereby the first armature portion of the L-shaped armature cooperates with the L-shaped yoke to be able to swing with the other end of the permanent magnet as a rotational support point.

[0016] According to an exemplary embodiment of the present disclosure, a magnetically conductive member is attached between the other end of the permanent magnet and the first armature portion of the L-shaped armature, and a protruding third convex portion is provided at one end of the magnetically conductive member connected to the first armature portion of the L-shaped armature, the third convex portion being molded integrally with the magnetically conductive member, and the first armature portion of the L-shaped armature cooperating with the L-shaped yoke so as to be swingable with the corresponding end of the magnetically conductive member as a rotational support point.

[0017] According to an exemplary embodiment of the present disclosure, a limiting shaft is provided on each of both widthwise sides of a first armature part of an L-shaped armature, a center line of the limiting shaft is perpendicular to a connection line or an extension line that runs from one end of a permanent magnet to the other end and passes through the rotation support point, a fourth protrusion is provided on the coil bobbin extending in the direction of the first armature part of the L-shaped armature, a groove is provided in the fourth protrusion and disposed in the limiting shaft of the first armature part of the L-shaped armature, and the limiting shaft of the L-shaped armature is rotatably and limitably disposed in the groove of the fourth protrusion of the coil bobbin.

[0018] According to an exemplary embodiment of the present disclosure, the centerline of the limiting shaft overlaps with the rotational support point.

[0019] According to an exemplary embodiment of the present disclosure, the groove of the fourth protrusion of the coil bobbin cooperates with the limiting shaft of the L-shaped armature in an arc shape.

[0020] According to an exemplary embodiment of the present disclosure, the limiting shaft of the L-shaped armature is a fifth protrusion integrally formed on both sides in the width direction of the first armature part of the L-shaped armature.

[0021] According to an exemplary embodiment of the present disclosure, a first armature portion of the L-shaped armature is partially covered with a plastic member, and a limiting shaft of the L-shaped armature is a sixth protrusion that is integrally molded with the plastic member and corresponds to both side edges in the width direction of the first armature portion of the L-shaped armature.

[0022] According to an exemplary embodiment of the present disclosure, a pressure spring is further connected to the first armature part of the L-shaped armature, and the first armature part of the L-shaped armature is connected to the coil bobbin via the pressure spring.

[0023] According to an exemplary embodiment of the present disclosure, a pressure spring comprises a main piece and a flap, the flap is folded on both sides of the main piece and protrudes to one side, a surface of the first armature part of the L-shaped armature facing the first yoke part of the L-shaped yoke protrudes outward and is provided with a bump, a first engagement hole is provided in the main piece, and the first engagement hole of the main piece corresponds to and is aligned with the bump of the first armature part of the L-shaped armature, and the flap of the pressure spring extends to and is connected to the coil bobbin.

[0024] According to an exemplary embodiment of the present disclosure, a second engagement hole is provided in the flap of the pressure spring, and a locking block is provided at a corresponding position of the coil bobbin, and the second engagement hole of the flap of the pressure spring engages and cooperates with the locking block of the coil bobbin.

[0025] According to an exemplary embodiment of the present disclosure, the second engagement hole of the flap of the pressure spring is elongated, a locking piece is provided on one side of the second engagement hole, a slope is provided on the side of the locking block facing the main piece of the pressure spring, and the side of the locking block facing away from the main piece of the pressure spring is a face, and the locking piece of the second engagement hole is aligned with the face of the locking block.

[0026] According to an exemplary embodiment of the present disclosure, a recess is provided on a surface of the first armature part of the L-shaped armature facing away from the first yoke part of the L-shaped yoke, and the pressure spring is provided with an elastic tongue corresponding to the recess, and the elastic tongue of the pressure spring abuts against the recess of the first armature part of the L-shaped armature.

[0027] According to an exemplary embodiment of the present disclosure, a predetermined second gap is provided between the first armature portion of the L-shaped armature and the other end of the permanent magnet, and a rotation shaft is provided on each of both widthwise sides of the L-shaped armature on an extension line corresponding to a connection line from one end to the other end of the permanent magnet, the rotation shaft realizing a seesaw motion, and a support portion supporting the rotation shaft of the L-shaped armature is provided on the coil bobbin.

[0028] According to another aspect of the present disclosure, there is provided a magnetic latching relay comprising a base, a static spring portion, a dynamic spring portion, a push card, and the above-mentioned hinge-type bistable magnetic circuit structure, wherein the hinge-type bistable magnetic circuit structure, the static spring portion, and the dynamic spring portion are each attached to the base, and the push card is connected between a first armature portion of an L-shaped armature of the hinge-type bistable magnetic circuit structure and a dynamic spring piece of the dynamic spring portion.

[0029] According to an exemplary embodiment of the present disclosure, the base and the coil bobbin of the coil of the hinge-type bistable magnetic circuit structure are a one-piece integrally injection molded member, and the base is provided with a through hole that is convenient for mounting the L-shaped armature.

[0030] Compared with the related art, the beneficial effects of the present disclosure are as follows:

[0031] The present disclosure employs one coil, one L-shaped armature, one L-shaped yoke and one permanent magnet to form a hinge-type bistable magnetic circuit structure, so that there are only three components excluding the coil, and the assembly of the three components is very convenient. Unlike the related art, there is no need to crimp the yoke and the iron core, and there is no need to injection mold the entire armature part. In particular, by adopting the asymmetry of the component structure of the L-shaped armature and the L-shaped yoke, a symmetrical rotation moment can be formed, which solves the disadvantages caused by the symmetrical structure of the conventional bistable magnetic circuit structure, simplifies the processing of components, and not only reduces the number of components, but also reduces the processing process, resulting in simple product structure and processing technology, low manufacturing costs and convenient assembly.

[0032] The present disclosure will be described in more detail below with reference to the accompanying drawings and examples. However, the hinge-type bistable magnetic circuit structure and magnetic latching relay of the present disclosure are not limited to the examples. [Brief description of the drawings]

[0033] [Figure 1] FIG. 1 is a schematic diagram of a hinge-type bistable magnetic circuit structure in the prior art. [Diagram 2] FIG. 2 is a cross-sectional view of a hinge-type bistable magnetic circuit structure in a first embodiment of the present disclosure. [Diagram 3] FIG. 2 is a cross-sectional view of a hinge-type bistable magnetic circuit structure (without an armature, a yoke, a permanent magnet, and a coil attached) in a first embodiment of the present disclosure. [Figure 4] FIG. 2 is a schematic diagram of a coil structure in the first embodiment of the present disclosure. [Diagram 5] FIG. 2 is a schematic diagram of a design state of a hinge-type bistable magnetic circuit structure in the first embodiment of the present disclosure. [Figure 6] FIG. 2 is a schematic diagram of a magnetic circuit in one state of a hinge-type bistable magnetic circuit structure in the first embodiment of the present disclosure. [Figure 7] FIG. 13 is a schematic diagram of a magnetic circuit in another state of the hinge-type bistable magnetic circuit structure in the first embodiment of the present disclosure. [Figure 8]FIG. 2 is a schematic diagram of a perspective structure of an L-shaped armature in the first embodiment of the present disclosure. [Figure 9] FIG. 1 is a schematic diagram of a perspective structure of a magnetic latching relay (without a case) according to a first embodiment of the present disclosure. [Figure 10] FIG. 1 is an exploded schematic diagram of a perspective view of a magnetic latching relay according to a first embodiment of the present disclosure. [Figure 11] FIG. 1 is a cross-sectional view of a structure of a magnetic latching relay according to a first embodiment of the present disclosure. [Figure 12] FIG. 13 is a simplified schematic diagram of a hinge-type bistable magnetic circuit structure in a second embodiment of the present disclosure. [Figure 13] FIG. 13 is a simplified schematic diagram of a hinge-type bistable magnetic circuit structure in a third embodiment of the present disclosure. [Figure 14] FIG. 13 is a schematic diagram of a perspective structure of an L-shaped armature in the fourth embodiment of the present disclosure. [Figure 15] FIG. 13 is a simplified schematic diagram of a hinge-type bistable magnetic circuit structure in Example 5 of the present disclosure. [Figure 16] FIG. 13 is a schematic diagram of a perspective view of a hinge-type bistable magnetic circuit structure in a sixth embodiment of the present disclosure. [Figure 17] FIG. 13 is a side view of a hinge-type bistable magnetic circuit structure in the sixth embodiment of the present disclosure. [Figure 18] FIG. 13 is an exploded schematic diagram of a hinge-type bistable magnetic circuit structure in the sixth embodiment of the present disclosure. [Figure 19] FIG. 13 is a schematic diagram of the cooperation of a pressure spring and an L-shaped armature in a hinge-type bistable magnetic circuit structure in the sixth embodiment of the present disclosure. [Figure 20] FIG. 13 is a schematic diagram of a perspective structure of an L-shaped armature of a hinge-type bistable magnetic circuit structure in a sixth embodiment of the present disclosure. [Figure 21] FIG. 13 is a schematic diagram of a perspective view of a pressure spring of a hinge-type bistable magnetic circuit structure in a sixth embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] In the embodiments of the invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood to indicate or imply any relative importance. Terms such as "attach", "contact", "connect", "fix" and the like are to be understood broadly. Books The specific meanings of the above terms in the embodiments of the invention can be understood by those skilled in the art according to the specific circumstances. In describing the embodiments of the present invention, the orientations or positional relationships indicated by the terms "upper," "lower," "left," "right," "front," "rear," etc. are based on the orientations or positional relationships shown in the drawings, and are merely intended to facilitate the explanation and simplification of the description of the embodiments of the present invention, and do not indicate or imply that the designated devices or units must be configured and operated in a particular orientation, and should not be understood as limitations on the embodiments of the invention. Example 1 2 to 8, the hinge-type bistable magnetic circuit structure of the present disclosure includes one coil 1, one L-shaped armature 2, one L-shaped yoke 3, and one permanent magnet 4, and the L-shaped yoke 3 includes a first yoke portion 31 and a second yoke portion 32 formed in an L shape. Here, the first yoke portion 31 is provided vertically, the second yoke portion 32 of the L-shaped yoke 3 is provided horizontally, and the second yoke portion 32 of the L-shaped yoke 3 is located at the top, and the L-shaped armature 2 is rotated 180 degrees and provided on the side of the L-shaped yoke 3, i.e., the L-shaped armature 2 is disposed in a state rotated 180 degrees around the vertical side of the L shape as an axis, and surrounds the outline of a frame shape together with the L-shaped yoke 3, i.e., the L-shaped armature 2 includes a first armature portion 21 and a second armature portion 22, and the first armature The first armature part 21 of the L-shaped armature 2 is arranged in a vertical direction, and the second armature part 22 of the L-shaped armature 2 is arranged in a horizontal direction. The second armature part 22 of the L-shaped armature 2 is located at the bottom, and at two opposing diagonal corners of the frame shape, a predetermined first gap, i.e., an upper gap H1 and a lower gap H2 (as shown in FIG. 5), is provided at the connection point between the L-shaped armature 2 and the L-shaped yoke 3. During operation, the first gap can change, and the first gap in the operating state can also be called an operating air gap. The coil 1 is disposed on one side of the L-shape of the L-shaped yoke 3, i.e., on the first yoke part 31 disposed vertically, one end of the permanent magnet 4 is connected to the first yoke part 31 of the L-shaped yoke 3, and the first armature part 21 disposed vertically of the L-shape of the L-shaped armature 2 is disposed on the other end of the permanent magnet 4 to perform a seesaw motion, forming a bistable magnetic circuit between the permanent magnet 4 and the L-shaped armature 2 and the L-shaped yoke 3, whose member structures are asymmetric, and switching between two stable states of the bistable magnetic circuit is realized by exciting the coil, i.e., both ends of the L-shaped armature 2 realize a hinge operation by exciting the coil 1. In the designed state (as shown in FIG. 5), the L-shaped armature 2 and the L-shaped yoke 3 form the outline of a frame shape, and an upper gap H1 and a lower gap H2 must be provided at two opposing diagonals of the frame shape.In this way, the L-shaped armature 2 can perform a seesaw motion. In an ideal state, the upper gap H1 and the lower gap H2 are the same, so that the L-shaped armature 2 is in a balanced state with two gaps between the L-shaped armature 2 and the L-shaped yoke 3. However, since it is difficult to make the upper gap H1 and the lower gap H2 the same during assembly, after the L-shaped armature 2 is assembled, due to the difference between the upper gap H1 and the lower gap H2 that occurs during assembly, a larger gap (i.e., the sum of the upper gap H1 and the lower gap H2) exists at one location between the L-shaped armature 2 and the L-shaped yoke 3 under the action of the permanent magnet, and other gaps as conventionally designed disappear, so that there is only one large gap between the L-shaped armature 2 and the L-shaped yoke 3.

[0035] In this embodiment, the first armature portion 21 of the L-shaped armature 2 and the first yoke portion 31 of the L-shaped yoke 3 are located on two opposing sides of the frame shape, respectively, and one end of the permanent magnet 4 is vertically connected to the first yoke portion 31 of the L-shaped yoke 3 inside the frame shape surrounded by the L-shaped armature and the L-shaped yoke. In the designed state (as shown in FIG. 5), the permanent magnet 4 is perpendicular to the first armature portion 21 of the L-shaped armature 2 and the first yoke portion 31 of the L-shaped yoke 3, respectively, and the end faces at both ends of the permanent magnet 4 are magnetic pole faces, with the surface of the permanent magnet 4 close to the first yoke portion 31 of the L-shaped yoke 3 being the N pole and the surface of the permanent magnet 4 close to the first armature portion 21 of the L-shaped armature 2 being the S pole (as shown in FIGS. 6 and 7).

[0036] In this embodiment, the inner surface of the end of the first armature part 21 of the L-shaped armature 2 corresponds to the end face of the second yoke part 32 of the L-shaped yoke 3, and the inner surface of the end of the first yoke part 31 of the L-shaped yoke 3 corresponds to the end face of the second armature part 22 of the L-shaped armature 2.

[0037] In this embodiment, the bistable magnetic circuit comprises a first magnetic circuit passing through the permanent magnet 4, a part of the first armature part 21 of the L-shaped armature 2, the second yoke part 32 of the L-shaped yoke 3, and a part of the first yoke part 31 of the L-shaped yoke 3, and a second magnetic circuit passing through the permanent magnet 4, another part of the first armature part 21 of the L-shaped armature 2, the second armature part 22 of the L-shaped armature 2, and another part of the first yoke part 31 of the L-shaped yoke 3.

[0038] In this embodiment, the L-shaped armature 2 is in one stable state when the inner surface of the end of the first armature portion 21 of the L-shaped armature 2 contacts the end face of the second yoke portion 32 of the L-shaped yoke 3, and the operating air gap of one of the two opposing diagonals of the frame shape is smaller than the operating air gap of the other diagonal (the upper gap H1 shown in FIG. 6 is smaller than the lower gap H2). When the inner surface of the end of the first yoke portion 31 of the L-shaped yoke 3 contacts the end face of the second armature portion 22 of the L-shaped armature 2, and the operating air gap of the other of the two opposing diagonals of the frame shape is smaller than the operating air gap of the one diagonal (the lower gap H2 shown in FIG. 7 is smaller than the upper gap H1), the L-shaped armature 2 is in another stable state. The inner surface of the end of the first armature portion 21 of the L-shaped armature 2 and the end face of the second yoke portion 32 of the L-shaped yoke 3 are operating pole surfaces which cooperate with each other, and as shown in Figures 5 and 6, in this embodiment, the inner surface of the end of the first armature portion 21 of the L-shaped armature 2 is made to have a certain inclination to realize matching and joining with the end face of the second yoke portion 32 of the L-shaped yoke 3, and of course, the end face of the second yoke portion 32 of the L-shaped yoke 3 may be made to have an inclination. Similarly, the inner surface of the end of the first yoke portion 31 of the L-shaped yoke 3 and the end face of the second armature portion 22 of the L-shaped armature 2 are also operating pole surfaces which cooperate with each other, and one of them is provided as an inclined surface to facilitate cooperation.

[0039] In this embodiment, the permanent magnet 4 is located between the center of the first yoke portion 31 of the L-shaped yoke 3 and the center of the first armature portion 21 of the L-shaped armature 2 .

[0040] In this embodiment, the length dimension of one side of the L-shape of the L-shaped armature 2 (first armature portion 21) is greater than the length dimension of the other side of the L-shape of the L-shaped armature 2 (second armature portion 22); that is, as shown in FIG. 5, the vertical length dimension of the first armature portion 21 is greater than the horizontal length dimension of the second armature portion 22, and the length dimension of one side of the L-shape of the L-shaped yoke 3 (first yoke portion 31) is greater than the length dimension of the other side of the L-shape of the L-shaped yoke 3 (second yoke portion 32); that is, as shown in FIG. 5, the vertical length dimension of the first yoke portion 31 is greater than the horizontal length dimension of the second yoke portion 32.

[0041] In this embodiment, the coil 1 includes a coil bobbin 12 and an enamel wire 11 wound in a winding window of the coil bobbin, the first yoke portion 31 of the L-shaped yoke 3 is inserted into the core mounting hole 121 of the coil bobbin 12, a permanent magnet mounting hole 123 facing the first armature portion 21 of the L-shaped armature 2 is provided in the center of the winding window of the coil bobbin 12, the permanent magnet mounting hole 123 is connected to the core mounting hole 121, and the permanent magnet 4 is provided in the permanent magnet mounting hole 123 of the coil bobbin.

[0042] In this embodiment, the first armature portion 21 of the L-shaped armature 2 rockably cooperates with the L-shaped yoke 3 with the other end of the permanent magnet 4 serving as a rotation support point, thereby achieving a seesaw motion.

[0043] In this embodiment, as shown in FIG. 5 , a second protrusion 23 is provided protruding from an inner surface of the first armature portion 21 of the L-shaped armature 2, and the second protrusion 23 is molded integrally with the first armature portion 21. The second protrusion 23 of the first armature portion 21 of the L-shaped armature 2 abuts against an end face of the other end of the permanent magnet 4, and the first armature portion 21 of the L-shaped armature 2 cooperates with the L-shaped yoke 3 to be able to swing, with the other end of the permanent magnet 4 serving as a rotational support point.

[0044] In this embodiment, as shown in FIG. 8, limiting shafts 24 for limiting the L-shaped armature 2 are provided on both sides in the width direction W of the first armature part 21 of the L-shaped armature 2, and a center line L of the limiting shaft 24 is a connection line or an extension line that perpendicularly intersects from one end to the other end of the permanent magnet 4 and passes through the rotation support point. As shown in FIG. 4, the coil bobbin 12 is provided with a fourth convex part 122 extending in the direction of the first armature part 21 of the L-shaped armature 2, and the fourth convex part 122 is provided with a groove 124 disposed in the limiting shaft 24 of the first armature part 21 of the L-shaped armature 2, and the limiting shaft 24 of the L-shaped armature 2 is rotatably disposed in the groove 124 of the fourth convex part 122 of the coil bobbin 12. The desired effect is to align the centerline L of the limiting shaft with the rotational support point.

[0045] In this embodiment, the groove 124 of the fourth protrusion 122 of the coil bobbin 12 is in contact with and cooperates with the limiting shaft 24 of the L-shaped armature 2 in an arc shape.

[0046] In this embodiment, the limiting shaft 24 of the L-shaped armature 2 is a fifth protrusion integrally formed on both sides in the width direction W of the first armature portion 21 of the L-shaped armature 2 .

[0047] As shown in FIG. 6, the magnetic circuit structure is in one state, and when there is no current excitation to the coil, the permanent magnet 4 forms two parallel magnetic circuits through the permanent magnet magnetic circuit S1 and the permanent magnet magnetic circuit S2, where the upper working air gap of the permanent magnet magnetic circuit S1 is smaller than the lower working air gap of the permanent magnet magnetic circuit S2, and the magnetic resistance of the permanent magnet magnetic circuit S1 is the smallest and the magnetic flux is the largest, so the armature 2 maintains the state of FIG. 6. When it is necessary to switch to another state, a unidirectional excitation is applied to the coil, and the magnetic flux of the coil magnetic circuit S3 is superimposed with the magnetic flux of the permanent magnet magnetic circuit S2 in the lower working air gap, and is mutually weakened with the permanent magnet magnetic circuit S1. When the magnetic flux of the lower working air gap is larger than the magnetic flux in the upper working air gap, the armature 2 switches to the state of FIG. 7, and after the coil excitation is removed, at this time the magnetic resistance of the permanent magnet magnetic circuit S2 is the smallest and the magnetic flux is the largest, so the armature 2 maintains the state of FIG. 7. When it is necessary to switch to the state shown in FIG. 6, a reverse excitation is applied to the coil, and the magnetic flux of the coil magnetic circuit S3 is superimposed with the magnetic flux of the permanent magnet magnetic circuit S1 in the upper working air gap and mutually weakened by the permanent magnet magnetic circuit S2, when the magnetic flux of the upper working air gap is greater than that of the lower working air gap, the armature 2 switches to the state of FIG. 6, and after the coil excitation is removed, at this time the magnetic reluctance of the permanent magnet magnetic circuit S1 is minimum and the magnetic flux is maximum, and the armature 2 remains in the state of FIG. 6.

[0048] 2 to 11, the magnetic latching relay of the present disclosure includes a base 5, a static spring portion 6, a dynamic spring portion 7, a push card 8, and the hinge-type bistable magnetic circuit structure, and the hinge-type bistable magnetic circuit structure, the static spring portion 6, and the dynamic spring portion 7 are each attached to the base 5, and the push card 8 is connected between the first armature portion 21 of the L-shaped armature 2 of the hinge-type bistable magnetic circuit structure and the dynamic spring piece of the dynamic spring portion. Here, as shown in Fig. 10, the base 5 and the coil bobbin 12 are an integral member integrally injection molded, and the base 5 is provided with a through hole 51 that is convenient for mounting the L-shaped armature. As shown in Fig. 9, the push card 8 is connected between the first armature part 21 of the L-shaped armature 2 and the dynamic spring piece 71 of the dynamic spring part 7, and the first armature part 21 of the L-shaped armature 2 has a seventh protrusion 25 on both sides in the width direction W thereof, and the seventh protrusion 25 is provided above the limiting shaft 24. The seventh protrusion 25 of the L-shaped armature 2 is used to operate the push card 8 by cooperating with the push card 8. During assembly, the L-shaped yoke 3 can be directly inserted from top to bottom into the core mounting hole 121 of the coil bobbin using the first yoke part 31, the permanent magnet 4 can also be directly inserted into the permanent magnet mounting hole 123 of the coil bobbin, and the L-shaped armature 2 can be directly attached to the base and the coil bobbin from top to bottom, which is different from the conventional technology in that the yoke and the core do not require caulking, and the armature part does not require the entire injection molding.

[0049] The hinge-type bistable magnetic circuit structure and magnetic latching relay disclosed herein use a coil 1, one L-shaped armature 2, one L-shaped yoke 3 and one permanent magnet 4 to form a hinge-type bistable magnetic circuit structure, and there are only three components except for the coil, and the assembly of the three components is very convenient. Unlike the conventional technology, there is no need to crimp the yoke and the iron core, and there is no need to injection mold the entire armature part. In particular, by adopting an asymmetric component structure, the processing of the components is further simplified, the number of components is reduced, and the processing process is also reduced, resulting in the advantages of a simple product structure and processing technology, low manufacturing costs, and convenient assembly.

[0050] Example 2 As shown in FIG. 12 , this is a hinge-type bistable magnetic circuit structure and a magnetic latching relay according to the present disclosure. The difference from the first embodiment is that instead of a second protrusion being provided on the inner surface of the first armature portion 21 of the L-shaped armature 2, a first protrusion 41 is provided protruding from the end surface of the other end of the permanent magnet 4, the first protrusion 41 being molded integrally with the permanent magnet 4, and the first protrusion 41 of the permanent magnet 4 abuts against the inner surface of the first armature portion 21 of the L-shaped armature 2, so that the first armature portion 21 of the L-shaped armature 2 cooperates with the L-shaped yoke 3 to be able to swing, with the other end of the permanent magnet 4 serving as a rotation support point.

[0051] Example 3 As shown in FIG. 13 , this is a hinge-type bistable magnetic circuit structure and a magnetic latching relay according to the present disclosure. The difference from the first embodiment is that a second protrusion is not provided on the inner surface of the first armature part 21 of the L-shaped armature 2, a magnetic conductive member 42 is attached between the other end of the permanent magnet 4 and the first armature part 21 of the L-shaped armature 2, and a third protrusion 421 is provided at one end of the magnetic conductive member 42 connected to the first armature part 21 of the L-shaped armature. The third protrusion 421 is molded integrally with the magnetic conductive member 42, so that the first armature part 21 of the L-shaped armature 2 cooperates with the L-shaped yoke 3 to be able to swing, with the corresponding end of the magnetic conductive member 42 serving as a rotation support point.

[0052] Example 4 As shown in FIG. 14 , this is a hinge-type bistable magnetic circuit structure and a magnetic latching relay according to the present disclosure. The difference from the first embodiment is that a part of the first armature portion 21 of the L-shaped armature 2 is covered with a plastic member 26, and the limiting shaft of the L-shaped armature 2 is a sixth protrusion 27 that is integrally formed with the plastic member 26 and corresponds to both side edges in the width direction W of the first armature portion 21 of the L-shaped armature 2.

[0053] Example 5 As shown in FIG. 15 , this is a hinge-type bistable magnetic circuit structure and a magnetic latching relay according to the present disclosure. The difference from the first embodiment is that a predetermined second gap H3 is provided between the first armature portion 21 of the L-shaped armature 2 and the other end of the permanent magnet 4, that a rotating shaft 28 is provided on each of both sides in the width direction of the L-shaped armature 2 on an extension line corresponding to a connection line from one end to the other end of the permanent magnet 4, that the rotating shaft 28 is used to realize a seesaw motion of the L-shaped armature 2, that a support portion 125 for supporting the rotating shaft 28 of the L-shaped armature 2 is provided on the coil bobbin 12, and that the support portion 125 in this embodiment is a semi-sealed bushing.

[0054] In this embodiment, the rotating shaft 28 may be provided directly on the L-shaped armature 2, or a part of the first armature portion 21 of the L-shaped armature 2 may be covered with a plastic member and the rotating shaft 28 may be integrally injection molded from the plastic member.

[0055] Example 6 16 to 21, the present disclosure provides a hinge-type bistable magnetic circuit structure and a magnetic latching relay, which differs from the first embodiment in that a pressure spring 9 is further connected to the first armature portion 21 of the L-shaped armature 2, and the first armature portion 21 of the L-shaped armature 2 is connected to the coil bobbin 12 via the pressure spring 9. That is, in this embodiment, the pressure spring 9 is used instead of a limiting shaft to realize a limit for the L-shaped armature 2.

[0056] In this embodiment, as shown in FIG. 18 , the pressure spring 9 includes a main piece 91 and a flap 92 folded at two sides of the main piece 91 and protruding toward one side, a bump 291 protruding outward is provided on the surface of the first armature part 21 of the L-shaped armature 2 facing away from the first yoke part 31 of the L-shaped yoke 3, a first locking hole 911 is provided in the main piece 91, and the first locking hole 911 in the main piece 91 corresponds to and cooperates with the bump 291 of the first armature part 21 of the L-shaped armature 2, and the flap 92 of the pressure spring 9 extends to the coil bobbin 12 and is connected to the coil bobbin 12. The main piece 91 of the pressure spring 9 is flexible, which ensures that after the pressure spring 9 is connected to the first armature part 21 of the L-shaped armature 2, the first armature part 21 of the L-shaped armature 2 can perform a seesaw-type movement.

[0057] In this embodiment, as shown in FIG. 18, a second engagement hole 921 is provided in the flap 92 of the pressure spring 9, and a locking block 126 is provided at a corresponding position on the coil bobbin 12, and the second engagement hole 921 of the flap 92 of the pressure spring 9 engages with and cooperates with the locking block 126 of the coil bobbin 12.

[0058] In this embodiment, the second engagement hole 921 of the flap 92 of the pressure spring 9 is elongated, and a locking piece 922 is provided on one side of the second engagement hole 921. As shown in Figures 16 to 17, a slope 1261 is provided on the side of the locking block 126 facing the main piece 91 of the pressure spring 9, and the side of the locking block 126 facing away from the main piece 91 of the pressure spring 9 is a face 1262, and the locking piece 922 of the second engagement hole 921 cooperates with the face 1262 of the locking block 126.

[0059] In this embodiment, as shown in FIG. 18 , a recess 292 is provided on a surface of the first armature portion 21 of the L-shaped armature 2 facing away from the first yoke portion 31 of the L-shaped yoke 3, and the pressure spring 9 is provided with an elastic tongue piece 93 corresponding to the recess 292, and the elastic tongue piece 93 of the pressure spring 9 abuts against the recess 292 of the first armature portion 21 of the L-shaped armature 2.

[0060] The above is only a preferred embodiment of the present disclosure, and is not a limitation of the present disclosure in any form. The present disclosure is disclosed in a preferred embodiment as described above, but is not used to limit the present disclosure. Any technician familiar with the art can make many possible variations and modifications to the technical scope of the present disclosure using the above disclosed technical content without departing from the technical scope of the present disclosure, or modify it into an equivalent embodiment. Therefore, any simple modifications, equivalent changes and modifications substantially made to the above embodiments based on the technology of the present disclosure that do not deviate from the technical proposal of the present disclosure should be within the scope of protection of the technical proposal of the present disclosure.

[0061] This disclosure claims priority to a Chinese patent application bearing application number 202110054313.5, filed on January 15, 2021, and entitled "Hinge-Type Bistable Magnetic Circuit Structure and Magnetic Latching Relay," the entire contents of which are incorporated herein by reference.

Claims

1. A magnetic latching relay comprising a base, a static spring portion, a dynamic spring portion, a push card, and a hinge-type bistable magnetic circuit structure, The hinge-type bistable magnetic circuit structure includes a coil, an L-shaped armature, an L-shaped yoke, and a permanent magnet; the L-shaped armature is disposed on a side of the L-shaped yoke after being rotated 180 degrees, and together they surround the outline of a frame shape, and a predetermined first gap is provided at a connection point between the L-shaped armature and the L-shaped yoke at two opposing diagonals of the frame shape, the L-shaped yoke has a first yoke part and a second yoke part formed in an L shape, the coil is disposed on the first yoke part of the L-shaped yoke, one end of the permanent magnet is connected to the first yoke part of the L-shaped yoke, the L-shaped armature has a first armature part and a second armature part formed in an L shape, and the first armature part is disposed on the other end of the permanent magnet and performs a seesaw type motion, thereby forming a bistable magnetic circuit between the permanent magnet and the L-shaped armature and the L-shaped yoke, which have asymmetrical component structures, and switching between two stable states of the bistable magnetic circuit is realized by exciting a coil; the hinge-type bistable magnetic circuit structure, the static spring portion, and the dynamic spring portion are each attached to a base, and the push card is connected between a first armature portion of an L-shaped armature of the hinge-type bistable magnetic circuit structure and a dynamic spring piece of the dynamic spring portion.

2. 2. The magnetic latching relay according to claim 1, wherein a first armature portion of the L-shaped armature and a first yoke portion of the L-shaped yoke are located on two opposing sides of the frame shape, respectively, one end of the permanent magnet is connected perpendicularly to the first yoke portion of the L-shaped yoke inside the frame shape surrounded by the L-shaped armature and the L-shaped yoke, and end faces on both ends of the permanent magnet are magnetic pole faces.

3. 3. The magnetic latching relay according to claim 2, wherein an inner surface of an end of a first armature portion of the L-shaped armature corresponds to an end face of a second yoke portion of the L-shaped yoke, and an inner surface of an end of the first yoke portion of the L-shaped yoke corresponds to the end face of the second armature portion of the L-shaped armature.

4. 4. The magnetic latching relay according to claim 3, wherein the bistable magnetic circuit comprises a first magnetic circuit passing through a permanent magnet, a portion of the first armature portion of the L-shaped armature, a second yoke portion of the L-shaped yoke, and a portion of the first yoke portion of the L-shaped yoke, and a second magnetic circuit passing through a permanent magnet, another portion of the first armature portion of the L-shaped armature, the second armature portion of the L-shaped armature, and another portion of the first yoke portion of the L-shaped yoke.

5. 5. The magnetic latching relay according to claim 4, wherein in the bistable magnetic circuit, when an inner surface of an end of a first armature part of the L-shaped armature contacts an end face of a second yoke part of the L-shaped yoke and a first gap of one of two opposing diagonals of the frame shape is smaller than a first gap of the other diagonal, the L-shaped armature is in one stable state, and when an inner surface of an end of a first yoke part of the L-shaped yoke contacts an end face of the second armature part of the L-shaped armature and a first gap of the other of two opposing diagonals of the frame shape is smaller than the first gap of the one diagonal, the L-shaped armature is in another stable state.

6. 6. The magnetic latching relay according to claim 2, wherein the permanent magnet is located between a central portion of a first yoke portion of the L-shaped yoke and a central portion of a first armature portion of the L-shaped armature.

7. 7. The magnetic latching relay according to claim 6, wherein a length dimension of the first armature portion of the L-shaped armature is greater than a length dimension of the second armature portion of the L-shaped armature, and a length dimension of the first yoke portion of the L-shaped yoke is greater than a length dimension of the second yoke portion of the L-shaped yoke.

8. 3. The magnetic latching relay according to claim 2, wherein the coil comprises a coil bobbin and an enamel wire wound around a winding window of the coil bobbin, the first yoke portion of the L-shaped yoke is inserted into an iron core mounting hole of the coil bobbin, a permanent magnet mounting hole is provided in a center portion of the winding window of the coil bobbin facing the first armature portion of the L-shaped armature, the permanent magnet mounting hole communicates with the iron core mounting hole, and the permanent magnet is disposed in the permanent magnet mounting hole of the coil bobbin.

9. 9. The magnetic latching relay according to claim 8, wherein the first armature portion of the L-shaped armature rockably cooperates with the L-shaped yoke with the other end of the permanent magnet as a rotation support point to realize a seesaw type motion.

10. 10. The magnetic latching relay according to claim 9, wherein a first convex portion is provided protruding from an end face of the other end of the permanent magnet, the first convex portion being molded integrally with the permanent magnet, and the first convex portion of the permanent magnet abuts against an inner surface of the first armature portion of the L-shaped armature, such that the first armature portion of the L-shaped armature cooperates with an L-shaped yoke to be able to swing about the other end of the permanent magnet as a rotation support point.

11. 10. The magnetic latching relay according to claim 9, wherein a second protrusion is provided on an inner surface of the first armature portion of the L-shaped armature, the second protrusion being integrally molded with the first armature portion, and the second protrusion of the first armature portion of the L-shaped armature abuts against an end face of the other end of the permanent magnet, such that the first armature portion of the L-shaped armature cooperates with an L-shaped yoke to be able to swing about the other end of the permanent magnet as a rotation support point.

12. 10. The magnetic latching relay according to claim 9, further comprising: a magnetically conductive member attached between the other end of the permanent magnet and the first armature portion of the L-shaped armature; and a protruding third convex portion is provided at one end of the magnetically conductive member connected to the first armature portion of the L-shaped armature, the third convex portion being molded integrally with the magnetically conductive member, such that the first armature portion of the L-shaped armature cooperates with the L-shaped yoke to be able to swing about the corresponding end of the magnetically conductive member as a rotation support point.

13. 13. The magnetic latching relay according to claim 9, wherein a limiting shaft is provided on each of both sides in a width direction of a first armature part of the L-shaped armature, a center line of the limiting shaft is perpendicular to a connection line or an extension line that runs from one end of the permanent magnet to the other end and passes through the rotation support point, a fourth convex part is provided on the coil bobbin and extends in a direction of the first armature part of the L-shaped armature, a groove is provided in the fourth convex part and disposed in the limiting shaft of the first armature part of the L-shaped armature, and the limiting shaft of the L-shaped armature is rotatably and limitably disposed in the groove of the fourth convex part of the coil bobbin.

14. The magnetic latching relay according to claim 13 , wherein a center line of the limiting shaft overlaps with the rotation support point.

15. 14. The magnetic latching relay according to claim 13, wherein the groove of the fourth protrusion of the coil bobbin cooperates with the limiting shaft of the L-shaped armature in an arc shape.

16. 14. The magnetic latching relay according to claim 13, wherein the limiting shaft of the L-shaped armature is a fifth protrusion integrally formed on both sides in a width direction of the first armature portion of the L-shaped armature.

17. 14. The magnetic latching relay according to claim 13, wherein a part of the first armature portion of the L-shaped armature is covered with a plastic member, and a limiting shaft of the L-shaped armature is a sixth protrusion that is integrally molded with the plastic member and corresponds to both side edges in a width direction of the first armature portion of the L-shaped armature.

18. 13. The magnetic latching relay according to claim 9, wherein a pressure spring is connected to the first armature portion of the L-shaped armature, and the first armature portion of the L-shaped armature is connected to the coil bobbin via the pressure spring.

19. 19. The magnetic latching relay according to claim 18, wherein the pressure spring comprises a main piece and a flap, the flap is folded at both sides of the main piece and protrudes to one surface, a surface of the first armature part of the L-shaped armature facing the first yoke part of the L-shaped yoke protrudes outward and is provided with a bump, a first engagement hole is provided in the main piece, the first engagement hole of the main piece corresponds to and is aligned with the bump of the first armature part of the L-shaped armature, and the flap of the pressure spring extends to and is connected to the coil bobbin.

20. 20. The magnetic latching relay according to claim 19, wherein a second engagement hole is provided on the flap of the pressure spring, and a locking block is provided at a corresponding position of the coil bobbin, and the second engagement hole of the flap of the pressure spring is engaged with and aligned with the locking block of the coil bobbin.

21. 21. The magnetic latching relay according to claim 20, wherein the second engagement hole of the flap of the pressure spring is elongated, a locking piece is provided on one side of the second engagement hole, a slope is provided on a side of the locking block facing a main piece of the pressure spring, a side of the locking block facing away from the main piece of the pressure spring is a facing surface, and the locking piece of the second engagement hole is aligned with the facing surface of the locking block.

22. 20. The magnetic latching relay according to claim 19, wherein a recess is provided on a surface of the first armature part of the L-shaped armature facing away from the first yoke part of the L-shaped yoke, the pressure spring is provided with an elastic tongue piece corresponding to the recess, and the elastic tongue piece of the pressure spring abuts against the recess of the first armature part of the L-shaped armature.

23. 9. The magnetic latching relay according to claim 8, wherein a predetermined second gap is provided between the first armature portion of the L-shaped armature and the other end of the permanent magnet, a rotation shaft is provided on both sides in the width direction of the L-shaped armature on an extension line corresponding to a connection line from one end to the other end of the permanent magnet, the rotation shaft realizes a seesaw motion, and a support portion for supporting the rotation shaft of the L-shaped armature is provided on the coil bobbin.

24. 2. The magnetic latching relay according to claim 1, wherein the base and a coil bobbin of the coil of the hinge-type bistable magnetic circuit structure are an integral member integrally injection molded, and the base is provided with a through hole which is convenient for mounting an L-shaped armature.

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