A snap-on bistable magnetic circuit structure and magnetic latching relay

Abstract

The present invention discloses a snap-on bistable magnetic circuit structure and a magnetic latching relay. The magnetic circuit structure includes a coil, an L-shaped armature, an L-shaped yoke, and a magnet. The L-shaped armature is rotated 180 degrees and arranged on the side of the L-shaped yoke to form a frame-shaped outline. A preset first gap is provided at the junction of the L-shaped armature and the L-shaped yoke at two opposite corners of the frame. The coil is engaged with one side of the L-shaped yoke, and one end of the magnet is connected to one side of the L-shaped yoke. One side of the L-shaped armature engages with the other end of the magnet to perform a seesaw-like motion, thereby forming a bistable magnetic circuit between the magnet and the asymmetrical L-shaped armature and L-shaped yoke. The coil is excited to achieve switching between two stable states of the bistable magnetic circuit. The present invention reduces the number of parts and the number of processing steps, and has the characteristics of simple product structure and processing technology, low production cost, and convenient assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and in particular to a snap-on bistable magnetic circuit structure and a magnetic latching relay. Background Art

[0002] The bistable magnetic circuit structure adds magnets to the magnetic circuit structure, using the magnets to form a bidirectional magnetic field loop when the dynamic and static contacts of the relay are open and closed. The magnetic field loop exerts a holding force on the movement of the moving component (such as the armature), thereby achieving the holding state of the dynamic and static contacts of the relay being open and closed. The coil is only energized at the moment when the dynamic and static contacts are opened and closed, and the coil does not need to be powered to maintain the state, which has a good energy-saving effect.

[0003] Figure 1 Schematic diagram of a snap-on bistable magnetic circuit structure in the prior art. Figure 1 As shown, this snap-on bistable magnetic circuit structure includes a coil frame 101, an enameled wire 102, an iron core 103, two yokes 104 and an armature part 105; the enameled wire 102 is wound on the coil frame 101, the iron core 103 is installed in the iron core mounting hole of the coil frame 101, one end of the two yokes 104 is fixed to the two ends of the iron core 103 respectively, and the other ends of the two yokes 104 are used to cooperate with the armature part 105 respectively. The armature part 105 is integrally injection molded and includes two armatures. 106 and a magnet, wherein the magnet is located between the two armatures 106 and is enclosed in a plastic part 107, and the two ends of the two armatures 106 extend out of the plastic part 107 to form an I-shaped integral part, and the other ends of the two yokes 104 are respectively fitted into the notches on both sides of the I-shaped integral part, and the middle of the armature part 105 is rotatably arranged. When the armature part 105 rotates, the armatures 106 extending on both sides of the armature part 105 snap together with the yokes 104. This snap-on bistable magnetic circuit structure contains 8 parts in addition to the coil, and during the assembly process, the yoke 104 and the iron core 103 need to be riveted, and the armature part 105 needs to be integrally injection molded. The assembly and molding process of the entire magnetic circuit structure is relatively complicated. In addition, in order to ensure that the action and reset voltages are basically equal, the dynamic and static contacts of the relay have basically the same impact resistance in the open and closed states, and the magnetic circuit structure must be made into a symmetrical structure, that is, the armature part 105 must be made into a symmetrical structure, and the yoke 104 must also be designed into a symmetrical structure. The symmetrical structure ensures that the force arms of the coils on both sides are the same after energization during action and reset, thereby ensuring that the rotational torques on both sides around the fulcrum are the same during action and reset. For this reason, it causes the disadvantages of complex product structure, many parts, complex processing technology, high production cost and complicated assembly. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a snap-on bistable magnetic circuit structure and a magnetic latching relay. Through structural improvements, the number of parts and the number of processing steps are reduced, and the product structure and processing technology are simple, the production cost is low, and the assembly is convenient.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a snap-on bistable magnetic circuit structure, including a coil, an L-shaped armature, an L-shaped yoke and a magnet; the L-shaped armature is rotated 180 degrees and then arranged on the side of the L-shaped yoke and together form a frame-shaped outline, and at the two opposite diagonals of the frame, a preset first gap is provided at the junction of the L-shaped armature and the L-shaped yoke; the coil is fitted on one side of the L-shape of the L-shaped yoke, and one end of the magnet is connected to one side of the L-shape of the L-shaped yoke; one side of the L-shape of the L-shaped armature is fitted on the other end of the magnet to perform a seesaw motion, thereby forming a bistable magnetic circuit between the magnet and the L-shaped armature and L-shaped yoke with asymmetric part structures, and the excitation of the coil is used to realize switching between the two stable states of the bistable magnetic circuit.

[0006] One side of the L-shape of the L-shaped armature and one side of the L-shape of the L-shaped yoke are respectively located on two opposite sides of the frame shape; one end of the magnetic steel is vertically connected to one side of the L-shape of the L-shaped yoke inside the frame shape surrounded by the L-shaped armature and the L-shaped yoke, and the end faces of both ends of the magnetic steel are magnetic pole faces.

[0007] The inner side surface of the end of one side of the L-shape of the L-shaped armature corresponds to the end surface of the other side of the L-shape of the L-shaped yoke, and the inner side surface of the end of one side of the L-shape of the L-shaped yoke corresponds to the end surface of the other side of the L-shape of the L-shaped armature.

[0008] The bistable magnetic circuit is composed of a first magnetic circuit consisting of a magnet, a section of one side of the L-shaped armature, the other side of the L-shaped yoke, and a section of one side of the L-shaped yoke; and a second magnetic circuit consisting of a magnet, the other section of one side of the L-shaped armature, the other side of the L-shaped armature, and the other section of one side of the L-shaped yoke.

[0009] In the bistable magnetic circuit, when the inner side surface of the end of one side of the L-shape of the L-shaped armature is in contact with the end surface of the other side of the L-shape of the L-shaped yoke, so that the working air gap at one of the two opposite corners of the frame is smaller than the working air gap at the other corner, the L-shaped armature is in a stable state; when the inner side surface of the end of one side of the L-shape of the L-shaped yoke is in contact with the end surface of the other side of the L-shape of the L-shaped armature, so that the working air gap at the other corner of the two opposite corners of the frame is smaller than the working air gap at the one corner, the L-shaped armature is in another stable state.

[0010] The magnetic steel is located between the middle of one side of the L-shape of the L-shaped yoke and the middle of one side of the L-shape of the L-shaped armature.

[0011] The length dimension of one side of the L-shape of the L-shaped armature is greater than the length dimension of the other side of the L-shape of the L-shaped armature; the length dimension of one side of the L-shape of the L-shaped yoke is greater than the length dimension of the other side of the L-shape of the L-shaped yoke.

[0012] The coil includes a coil frame and an enameled wire wound around the winding window of the coil frame. One side of the L-shape of the L-shaped yoke is inserted into the iron core mounting hole of the coil frame. The middle of the winding window of the coil frame is provided with a magnetic steel mounting hole facing one side of the L-shape of the L-shaped armature. The magnetic steel mounting hole is connected to the iron core mounting hole, and the magnet is adapted to be mounted in the magnetic steel mounting hole of the coil frame.

[0013] One side of the L-shaped armature is swingably matched with the L-shaped yoke with the other end of the magnetic steel as a rotation support point, thereby realizing a seesaw motion.

[0014] The end face of the other end of the magnet is integrally formed with a first protrusion, and the first protrusion of the magnet abuts against the inner side surface of one side of the L-shape of the L-shaped armature, so that one side of the L-shape of the L-shaped armature can swingably cooperate with the L-shaped yoke with the other end of the magnet as a rotation support point.

[0015] The inner side surface of one of the L-shaped sides of the L-shaped armature is integrally formed with a second protrusion, and the second protrusion of one of the L-shaped sides of the L-shaped armature abuts against the end surface of the other end of the magnet, so that one of the L-shaped sides of the L-shaped armature can swingably cooperate with the L-shaped yoke with the other end of the magnet as a rotation support point.

[0016] A magnetic conductive part is also installed between the other end of the magnetic steel and one of the L-shaped sides of the L-shaped armature. The end of the magnetic conductive part that is connected to one of the L-shaped sides of the L-shaped armature is integrally formed with a third protrusion, so that one of the L-shaped sides of the L-shaped armature can be swingably matched with the L-shaped yoke with the corresponding end of the magnetic conductive part as the rotation support point.

[0017] A limiting shaft is provided on both sides of the width of one side of the L-shape of the L-shaped armature, and the center line of the limiting shaft intersects perpendicularly with the line from one end of the magnetic steel to the other end and passes through the rotation support point or the extension line; the coil frame is provided with a fourth protrusion extending in the direction of one side of the L-shape of the L-shaped armature, and the fourth protrusion is provided with a groove adapted to the limiting shaft on one side of the L-shape of the L-shaped armature, and the limiting shaft of the L-shaped armature can be rotatably limited and fitted in the groove of the fourth protrusion of the coil frame.

[0018] The center line of the limiting rotating shaft coincides with the rotation support point.

[0019] The groove of the fourth protrusion of the coil frame is matched with the limiting rotating shaft of the L-shaped armature in an arc shape.

[0020] The rotating shaft of the L-shaped armature is a fifth protrusion integrally formed on both sides of the width of one side of the L-shape of the L-shaped armature.

[0021] One side of the L-shape of the L-shaped armature is also partially covered with a plastic part, and the rotating shaft of the L-shaped armature is a sixth protrusion integrally formed on the plastic part on both sides corresponding to the width of one side of the L-shape of the L-shaped armature.

[0022] A compression spring is further connected to one side of the L-shape of the L-shaped armature, and one side of the L-shape of the L-shaped armature is connected to the coil frame through the compression spring.

[0023] The compression spring includes a main plate body and wings bent from both sides of the main plate body and protruding toward one side. One side of the L-shape of the L-shaped armature that is away from one side of the L-shape of the L-shaped yoke is protruding outward and is provided with a convex bud. The main plate body is provided with a first clamping hole. The first clamping hole of the main plate body corresponds to the convex bud on one side of the L-shape of the L-shaped armature. The wings of the compression spring extend toward the coil frame and are connected to the coil frame.

[0024] The wing of the compression spring is provided with a second locking hole, and the corresponding position of the coil frame is provided with a locking block, and the second locking hole of the wing of the compression spring is locked and matched with the locking block of the coil frame.

[0025] The second card hole of the wing of the compression spring is long and narrow, and a card is provided on one side of the second card hole; the side of the card block facing the main plate of the compression spring is provided with an inclined surface, and the side of the card block facing away from the main plate of the compression spring is set as a straight surface; the card of the second card hole cooperates with the straight surface of the card block.

[0026] A recess is provided on one side of the L-shape of the L-shaped armature facing away from one side of the L-shape of the L-shaped yoke, and the compression spring is provided with an elastic tongue corresponding to the recess, and the elastic tongue of the compression spring rests in the recess on one side of the L-shape of the L-shaped armature.

[0027] A preset second gap is provided between one side of the L-shape of the L-shaped armature and the other end of the magnet; a rotating shaft is provided on both sides of the width of the L-shape of the L-shaped armature, corresponding to the extension line of the line connecting one end to the other end of the magnet, so as to realize seesaw-like motion by using the rotating shaft; the coil frame is provided with a support portion for supporting the rotating shaft of the L-shaped armature.

[0028] A magnetic latching relay comprises a base, a static spring portion, a dynamic spring portion, a push card, and the aforementioned snap-fit ​​bistable magnetic circuit structure. The snap-fit ​​bistable magnetic circuit structure, the static spring portion, and the dynamic spring portion are respectively mounted on the base. The push card is connected between one side of the L-shaped armature of the snap-fit ​​bistable magnetic circuit structure and the dynamic spring piece of the dynamic spring portion.

[0029] The base and the coil frame of the coil of the snap-fit ​​bistable magnetic circuit structure are an integral injection-molded unit; the base is also provided with a through hole for facilitating the installation of the L-shaped armature.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] Since the present invention adopts a coil, an L-shaped armature, an L-shaped yoke and a magnet to form a snap-on bistable magnetic circuit structure, there are only three parts except the coil, and the assembly between the three parts is quite convenient. There is no need to rivet the yoke and the iron core as in the prior art, nor is there a need to injection mold the armature part as a whole as in the prior art. In particular, the asymmetry of the part structure of the L-shaped armature and the L-shaped yoke can also form a symmetrical rotational torque, which solves the disadvantages of the symmetrical structure of the traditional bistable magnetic circuit structure, makes part processing simpler, reduces the number of parts, and reduces the processing steps. It has the characteristics of simple product structure and processing technology, low production cost and convenient assembly.

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the snap-on bistable magnetic circuit structure and the magnetic latching relay of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of a snap-on bistable magnetic circuit structure in the prior art;

[0034] Figure 2 is a cross-sectional view of a snap-on bistable magnetic circuit structure according to a first embodiment of the present invention;

[0035] Figure 3 2 is a cross-sectional view of the snap-on bistable magnetic circuit structure (armature, yoke, magnet, and coil are not assembled) according to the first embodiment of the present invention;

[0036] Figure 4 1 is a schematic structural diagram of a coil according to a first embodiment of the present invention;

[0037] Figure 5 1 is a schematic diagram of the design state of the snap-on bistable magnetic circuit structure according to the first embodiment of the present invention;

[0038] Figure 6 1 is a schematic diagram of a magnetic circuit of a snap-on bistable magnetic circuit structure in one state according to the first embodiment of the present invention;

[0039] Figure 7 1 is a schematic diagram of the magnetic circuit of the snap-on bistable magnetic circuit structure in another state according to the first embodiment of the present invention;

[0040] Figure 8 1 is a schematic diagram of the three-dimensional structure of the L-shaped armature according to the first embodiment of the present invention;

[0041] Figure 9 1 is a schematic diagram of the three-dimensional structure of the magnetic latching relay (excluding the housing) according to the first embodiment of the present invention;

[0042] Figure 10 1 is a schematic exploded perspective view of the three-dimensional structure of a magnetic latching relay according to the first embodiment of the present invention;

[0043] Figure 11 is a structural cross-sectional view of a magnetic latching relay according to a first embodiment of the present invention;

[0044] Figure 12 This is a simplified schematic diagram of a snap-on bistable magnetic circuit structure according to a second embodiment of the present invention;

[0045] Figure 13 This is a simplified schematic diagram of a snap-on bistable magnetic circuit structure according to a third embodiment of the present invention;

[0046] Figure 14 1 is a schematic diagram of the three-dimensional structure of an L-shaped armature according to a fourth embodiment of the present invention;

[0047] Figure 15 This is a simplified schematic diagram of a snap-on bistable magnetic circuit structure according to a fifth embodiment of the present invention;

[0048] Figure 16 2 is a schematic diagram of the three-dimensional structure of the snap-on bistable magnetic circuit structure according to the sixth embodiment of the present invention;

[0049] Figure 17 1 is a side view of a snap-on bistable magnetic circuit structure according to a sixth embodiment of the present invention;

[0050] Figure 18 1 is a schematic diagram of the structure of the snap-on bistable magnetic circuit structure according to the sixth embodiment of the present invention;

[0051] Figure 19 Schematic diagram of the cooperation between the compression spring and the L-shaped armature of the snap-on bistable magnetic circuit structure according to the sixth embodiment of the present invention;

[0052] Figure 20 3D schematic diagram of the L-shaped armature of the snap-on bistable magnetic circuit structure according to the sixth embodiment of the present invention;

[0053] Figure 21 It is a schematic diagram of the three-dimensional structure of the compression spring of the snap-on bistable magnetic circuit structure according to the sixth embodiment of the present invention. DETAILED DESCRIPTION

[0054] Example 1

[0055] See also Figures 2 to 8 As shown, a snap-fit ​​bistable magnetic circuit structure of the present invention includes a coil 1, an L-shaped armature 2, an L-shaped yoke 3 and a magnet 4; one side 31 of the L-shaped yoke 3 is arranged vertically, the other side 32 of the L-shaped yoke 3 is arranged horizontally, and the other side 32 of the L-shaped yoke 3 is at the top; the L-shaped armature 2 is rotated 180 degrees and is arranged on the side of the L-shaped yoke 3 and together form a frame-shaped outline, that is, one side 21 of the L-shaped armature 2 is arranged vertically, the other side 22 of the L-shaped armature 2 is arranged horizontally, and the other side 22 of the L-shaped armature 2 is at the bottom; at the two opposite diagonals of the frame, a preset first gap, namely an upper gap H1 and a lower gap H2 (as shown in FIG. Figure 5 As shown); the coil 1 is fitted on one of the L-shaped sides of the L-shaped yoke 3, i.e., the vertically arranged side 31, and one end of the magnetic steel 4 is connected to one of the L-shaped sides 31 of the L-shaped yoke 3; one of the vertically arranged sides 21 of the L-shaped armature 2 is fitted on the other end of the magnetic steel 4 to perform a seesaw motion, thereby forming a bistable magnetic circuit between the magnetic steel 4 and the asymmetric L-shaped armature 2 and the L-shaped yoke 3, and utilizing the excitation of the coil to realize switching between the two stable states of the bistable magnetic circuit, i.e., the two ends of the L-shaped armature 2 realize a snapping action under the excitation of the coil 1. In the design state (such as Figure 5As shown in FIG, the L-shaped armature 2 and the L-shaped yoke 3 form a frame-shaped outline, and an upper gap H1 and a lower gap H2 must be provided at two opposite diagonals of the frame, so that the L-shaped armature 2 can perform a seesaw-like motion. Under ideal conditions, since the upper gap H1 and the lower gap H2 are the same, the L-shaped armature 2 is in a balanced state, and there are two gaps between the L-shaped armature 2 and the L-shaped yoke 3. However, during assembly, it is difficult to make the upper gap H1 and the lower gap H2 the same. Therefore, after the L-shaped armature 2 is installed, due to the difference between the upper gap H1 and the lower gap H2 caused by the assembly, under the action of the magnetic steel, there will be only one larger gap (i.e., the sum of the upper gap H1 and the lower gap H2) between the L-shaped armature 2 and the L-shaped yoke 3, and the other gap originally designed will disappear, so that there is only one large gap between the L-shaped armature 2 and the L-shaped yoke 3.

[0056] In this embodiment, one side 21 of the L-shaped armature 2 and one side 31 of the L-shaped yoke 3 are located at two opposite sides of the frame shape; one end of the magnetic steel 4 is perpendicularly connected to one side 31 of the L-shaped yoke 3 inside the frame shape formed by the L-shaped armature and the L-shaped yoke. Figure 5 As shown), the magnet 4 is perpendicular to one side 21 of the L-shaped armature 2 and one side 31 of the L-shaped yoke 3, and the end faces of the magnet 4 are magnetic pole faces. The side of the magnet 4 that is close to one side 31 of the L-shaped yoke 3 is the N pole, and the side of the magnet 4 that is close to one side 21 of the L-shaped armature 2 is the S pole (as shown). Figure 6 、 Figure 7 shown).

[0057] In this embodiment, the inner side surface of the end of one of the L-shaped sides 21 of the L-shaped armature 2 corresponds to the end surface of the other L-shaped side 32 of the L-shaped yoke 3, and the inner side surface of the end of one of the L-shaped sides 31 of the L-shaped yoke 3 corresponds to the end surface of the other L-shaped side 22 of the L-shaped armature 2.

[0058] In this embodiment, the bistable magnetic circuit is composed of a first magnetic circuit consisting of the magnet 4, a section of one side 21 of the L-shaped armature 2, the other side 32 of the L-shaped yoke 3, and a section of one side 31 of the L-shaped yoke 3; and a second magnetic circuit consisting of the magnet 4, the other section of one side 21 of the L-shaped armature 2, the other side 22 of the L-shaped armature 2, and the other section of one side 31 of the L-shaped yoke 3.

[0059] In this embodiment, in the bistable magnetic circuit, when the inner side surface of the end of one side 21 of the L-shaped armature 2 is in contact with the end surface of the other side 32 of the L-shaped yoke 3, the working air gap at one of the two opposite corners of the frame is smaller than the working air gap at the other corner (e.g. Figure 6 The upper working air gap is smaller than the lower working air gap as shown in the figure), the L-shaped armature 2 is in a stable state; when the inner side surface of the end of one side 31 of the L-shaped yoke 3 is in contact with the end surface of the other side 22 of the L-shaped armature 2, so that the working air gap at the other corner of the frame is smaller than the working air gap at the one corner (as ... Figure 7 The lower working air gap shown is smaller than the upper working air gap), and the L-shaped armature 2 is in another stable state. The inner side surface of the end of one of the L-shaped sides 21 of the L-shaped armature 2 and the end surface of the other L-shaped side 32 of the L-shaped yoke 3 are mutually matched working pole surfaces. In this embodiment, the inner side surface of the end of one of the L-shaped sides 21 of the L-shaped armature 2 is set to a certain inclined surface to achieve a fit with the end surface of the other L-shaped side 32 of the L-shaped yoke 3. Of course, the end surface of the other L-shaped side 32 of the L-shaped yoke 3 can also be set to an inclined surface; similarly, the inner side surface of the end of one of the L-shaped sides 31 of the L-shaped yoke 3 and the end surface of the other L-shaped side 22 of the L-shaped armature 2 are also mutually matched working pole surfaces, and one of them is set to an inclined surface for easy fit.

[0060] In this embodiment, the magnetic steel 4 is located between the middle of one side 31 of the L-shaped yoke 3 and the middle of one side 21 of the L-shaped armature 2 .

[0061] In this embodiment, the length dimension of one side 21 of the L-shape of the L-shaped armature 2 is greater than the length dimension of the other side 22 of the L-shape of the L-shaped armature 2; the length dimension of one side 31 of the L-shape of the L-shaped yoke 3 is greater than the length dimension of the other side 32 of the L-shape of the L-shaped yoke 3.

[0062] In this embodiment, the coil 1 includes a coil frame 12 and an enameled wire 11 wound on the winding window of the coil frame. One of the L-shaped sides 31 of the L-shaped yoke 3 is inserted into the iron core mounting hole 121 of the coil frame 12. The middle part of the winding window of the coil frame 12 is provided with a magnetic steel mounting hole 123 facing one of the L-shaped sides 21 of the L-shaped armature 2. The magnetic steel mounting hole 123 is connected to the iron core mounting hole 121, and the magnet 4 is adapted to be installed in the magnetic steel mounting hole 123 of the coil frame.

[0063] In this embodiment, one side 21 of the L-shaped armature 2 is swingably matched with the L-shaped yoke 3 with the other end of the magnet 4 as a rotation support point, thereby realizing a seesaw motion.

[0064] In this embodiment, the inner side surface of one of the L-shaped sides 21 of the L-shaped armature 2 is integrally formed with a second protrusion 23, and the second protrusion 23 of one of the L-shaped sides 21 of the L-shaped armature 2 abuts against the end surface of the other end of the magnet 4, so that one of the L-shaped sides 21 of the L-shaped armature 2 can swingably cooperate with the L-shaped yoke 3 with the other end of the magnet 4 as the rotation support point.

[0065] In this embodiment, a limiting shaft 24 is provided on each side of the width of one side 21 of the L-shaped armature 2. The limiting shaft 24 is used to limit the position of the L-shaped armature 2, and the centerline of the limiting shaft 24 perpendicularly intersects a line or an extension line from one end of the magnet 4 to the other and passing through the rotation support point. The coil bobbin 12 is provided with a fourth protrusion 122 extending toward one side of the L-shaped armature. The fourth protrusion 122 is provided with a groove 124 adapted to fit within the limiting shaft 24 on one side 21 of the L-shaped armature. The limiting shaft 24 of the L-shaped armature 2 is rotatably engaged with the groove 124 of the fourth protrusion 122 of the coil bobbin 12. For optimal performance, the centerline of the limiting shaft is aligned with the rotation support point.

[0066] In this embodiment, the groove 124 of the fourth protrusion 122 of the coil frame 12 is matched with the limiting rotation shaft 24 of the L-shaped armature in an arc shape.

[0067] In this embodiment, the rotating shaft 24 of the L-shaped armature 2 is a fifth protrusion integrally formed on both sides of the width of one side 21 of the L-shape of the L-shaped armature 2 .

[0068] See also Figure 6 As shown, the magnetic circuit structure is in a state where, when the coil is not energized, the magnet 4 forms two parallel magnetic circuits through the magnet magnetic circuit S1 and the magnet magnetic circuit S2. The upper working air gap of the magnet magnetic circuit S1 is smaller than the lower working air gap of the magnet magnetic circuit S2. The magnetic resistance of the magnet magnetic circuit S1 is the smallest and the magnetic flux is the largest, so the armature 2 is kept at Figure 6 state; when it is necessary to switch to another state, the coil is excited in one direction, and the magnetic flux of the coil magnetic circuit S3 is superimposed with the magnetic flux of the magnetic steel magnetic circuit S2 in the lower working air gap, and weakened by the magnetic steel magnetic circuit S1; when the magnetic flux in the lower working air gap is greater than that in the upper working air gap, the armature 2 switches Figure 7 State, after the coil excitation is removed, the magnetic resistance of the magnetic steel magnetic circuit S2 is the smallest, the magnetic flux is the largest, and the armature 2 remains in Figure 7 state; when you need to switch back Figure 6In the state shown, an excitation in the opposite direction is applied to the coil, and the magnetic flux of the coil magnetic circuit S3 is superimposed with the magnetic flux of the magnetic steel magnetic circuit S1 in the upper working air gap, and weakened by the magnetic steel magnetic circuit S2; when the magnetic flux in the upper working air gap is greater than that in the lower working air gap, the armature 2 switches back to Figure 6 State, after the coil excitation is removed, the magnetic resistance of the magnetic steel magnetic circuit S1 is the smallest, the magnetic flux is the largest, and the armature 2 remains in Figure 6 state.

[0069] See also Figures 2 to 11 As shown, a magnetic latching relay of the present invention includes a base 5, a static spring part 6, a dynamic spring part 7, a push card 8 and the above-mentioned snap-fit ​​bistable magnetic circuit structure. The snap-fit ​​bistable magnetic circuit structure and the static spring part 6 and the dynamic spring part 7 are respectively installed on the base 5. The push card 8 is connected between one of the L-shaped sides 21 of the L-shaped armature 2 of the snap-fit ​​bistable magnetic circuit structure and the dynamic spring piece of the dynamic spring part; wherein, the base 5 and the coil frame 12 are an integral part formed by integral injection molding, and a through hole 51 is provided on the base 5 for facilitating the installation of the L-shaped armature; the push card 8 is connected between one of the L-shaped sides 21 of the L-shaped armature 2 and the dynamic spring piece 71 of the dynamic spring part 7, and a seventh protrusion 25 is provided on both sides of the width of one of the L-shaped sides 21 of the L-shaped armature 2. The seventh protrusion 25 is provided above the limit rotation shaft 24. The seventh protrusion 25 of the L-shaped armature 2 is used to cooperate with the push card 8, thereby driving the push card 8 to move. During assembly, the L-shaped yoke 3 uses one side 21 of the L shape to be directly inserted from top to bottom into the iron core mounting hole 121 of the coil frame, and the magnet 4 can also be directly inserted into the magnet mounting hole 123 of the coil frame, and the L-shaped armature 2 can be directly installed into the base and the coil frame from top to bottom. There is no need to rivet the yoke and the iron core, and the armature part does not need to be integrally injection molded as in the prior art.

[0070] The present invention provides a snap-on bistable magnetic circuit structure and a magnetic latching relay, which use a coil 1, an L-shaped armature 2, an L-shaped yoke 3 and a magnet 4 to form a snap-on bistable magnetic circuit structure. In addition to the coil, there are only three parts, and the assembly of the three parts is quite convenient. There is no need to rivet the yoke and the iron core as in the prior art, nor is there a need to injection mold the armature part as a whole as in the prior art. In particular, the asymmetry of the part structure makes part processing simpler, which not only reduces the number of parts but also reduces the processing steps. The product has the characteristics of simple structure and processing technology, low production cost and convenient assembly.

[0071] Example 2

[0072] See also Figure 12As shown, a snap-on bistable magnetic circuit structure and a magnetic latching relay of the present invention differ from those of the first embodiment in that no second protrusion is provided on the inner side surface of one of the L-shaped sides 21 of the L-shaped armature 2, but a first protrusion 41 is integrally formed and protruded from the end surface of the other end of the magnet 4. The first protrusion 41 of the magnet 4 abuts against the inner side surface of one of the L-shaped sides 21 of the L-shaped armature 2, so that one of the L-shaped sides 21 of the L-shaped armature 2 can swingably cooperate with the L-shaped yoke 3 with the other end of the magnet 4 as a rotation support point.

[0073] Example 3

[0074] See also Figure 13 As shown, a snap-on bistable magnetic circuit structure and a magnetic latching relay of the present invention are different from those of the first embodiment in that no second protrusion is provided on the inner side surface of one of the L-shaped sides 21 of the L-shaped armature 2, and a magnetic conductive member 42 is further installed between the other end of the magnetic steel 4 and one of the L-shaped sides 21 of the L-shaped armature 2. The end of the magnetic conductive member 42 that is connected to one of the L-shaped sides 21 of the L-shaped armature is integrally formed with a third protrusion 421, so that one of the L-shaped sides 21 of the L-shaped armature 2 can be swingably matched with the L-shaped yoke 3 with the corresponding end of the magnetic conductive member 42 as the rotation support point.

[0075] Example 4

[0076] See also Figure 14 As shown, a snap-on bistable magnetic circuit structure and a magnetic latching relay of the present invention are different from those of the first embodiment in that one of the L-shaped sides of the L-shaped armature 2 is also partially covered with a plastic part 26, and the rotating shaft of the L-shaped armature is a sixth protrusion 27 integrally formed on the plastic part 26 on both sides corresponding to the width of one of the L-shaped sides 21 of the L-shaped armature.

[0077] Example 5

[0078] See also Figure 15 As shown, a snap-on bistable magnetic circuit structure and a magnetic latching relay of the present invention differ from those of the first embodiment in that a preset second gap H3 is provided between one side 21 of the L-shape of the L-shaped armature 2 and the other end of the magnet 4; a rotating shaft 28 is provided on both sides of the width of the L-shape of the L-shaped armature 2, corresponding to the extension line of the line connecting one end of the magnet to the other end, so as to achieve a seesaw-like motion by using the rotating shaft 28; and the coil frame 12 is provided with a support portion 125 for supporting the rotating shaft 28 of the L-shaped armature 2. The support portion 125 of this embodiment is a semi-enclosed sleeve.

[0079] In this embodiment, the rotating shaft is directly provided on the L-shaped armature 2. Alternatively, a portion of one side of the L-shaped armature 2 is covered with a plastic part, and the rotating shaft is integrally formed from the plastic part.

[0080] Example 6

[0081] See also Figures 16 to 21 As shown, the snap-on bistable magnetic circuit structure and magnetic latching relay of the present invention differ from the first embodiment in that a compression spring 9 is further connected to one of the L-shaped sides 21 of the L-shaped armature 2, and the L-shaped side 21 of the L-shaped armature 2 is connected to the coil bobbin 12 via the compression spring 9. In other words, this embodiment uses the compression spring 9 instead of the limit shaft to limit the position of the L-shaped armature 2.

[0082] In this embodiment, the compression spring 9 includes a main plate 91 and wings 92 that are bent from both sides of the main plate and protrude toward one side. A convex bulge 291 is protruded outward from one side of the L-shaped armature 2, facing away from one side of the L-shaped yoke. The main plate 91 is provided with a first latching hole 911, which corresponds to the bulge 291 on one side 21 of the L-shaped armature 2. The wings 92 of the compression spring 9 extend toward the coil frame 12 and are connected to the coil frame 12. The main plate 91 of the compression spring 9 is flexible, ensuring that after the compression spring 9 is connected to one side 21 of the L-shaped armature 2, the L-shaped armature 2 can perform a seesaw motion.

[0083] In this embodiment, the wing 92 of the compression spring 9 is provided with a second clamping hole 921, and the corresponding position of the coil frame 12 is provided with a clamping block 126. The second clamping hole 921 of the wing 92 of the compression spring 9 is clamped and matched with the clamping block 126 of the coil frame 12.

[0084] In this embodiment, the second card hole 921 of the wing 92 of the compression spring 9 is long and narrow, and a card 922 is provided on one side of the second card hole 921; the side of the card block 126 facing the main plate of the compression spring is provided with a slope 1261, and the side of the card block 126 facing away from the main plate of the compression spring is set as a straight surface 1262; the card 922 of the second card hole 921 cooperates with the straight surface 1262 of the card block 126.

[0085] In this embodiment, a recess 292 is provided on one side 21 of the L-shape of the L-shaped armature 2 facing away from one side of the L-shape of the L-shaped yoke, and the compression spring 9 is provided with an elastic tongue 93 corresponding to the recess 292, and the elastic tongue 93 of the compression spring 9 rests in the recess 292 of one side of the L-shape of the L-shaped armature.

[0086] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent equivalent embodiment. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A snap-on bistable magnetic circuit structure, characterized in that: The invention comprises a coil, an L-shaped armature, an L-shaped yoke and a magnet; the L-shaped armature is rotated 180 degrees and arranged on the side of the L-shaped yoke to form a frame-shaped outline together; at two opposite diagonals of the frame, a preset first gap is provided at the junction of the L-shaped armature and the L-shaped yoke; the coil is fitted on one side of the L-shaped yoke, and one end of the magnet is connected to one side of the L-shaped yoke; one side of the L-shaped armature is fitted on the other end of the magnet to perform a seesaw motion, thereby A bistable magnetic circuit is formed between the L-shaped armature and the L-shaped yoke, which have an asymmetric structure, and switching between the two stable states of the bistable magnetic circuit is achieved by using the excitation of the coil; the bistable magnetic circuit is composed of a first magnetic circuit consisting of a magnetic steel, a section of one side of the L-shaped portion of the L-shaped armature, the other side of the L-shaped portion of the L-shaped yoke, and a section of one side of the L-shaped portion of the L-shaped yoke; and a second magnetic circuit consisting of a magnetic steel, the other section of one side of the L-shaped portion of the L-shaped armature, the other side of the L-shaped portion of the L-shaped armature, and the other section of one side of the L-shaped portion of the L-shaped yoke.

2. The snap-on bistable magnetic circuit structure according to claim 1, characterized in that: One side of the L-shape of the L-shaped armature and one side of the L-shape of the L-shaped yoke are respectively located on two opposite sides of the frame shape; one end of the magnetic steel is vertically connected to one side of the L-shape of the L-shaped yoke inside the frame shape surrounded by the L-shaped armature and the L-shaped yoke, and the end faces of both ends of the magnetic steel are magnetic pole faces.

3. The snap-on bistable magnetic circuit structure according to claim 2, characterized in that: The inner side surface of the end of one side of the L-shape of the L-shaped armature corresponds to the end surface of the other side of the L-shape of the L-shaped yoke, and the inner side surface of the end of one side of the L-shape of the L-shaped yoke corresponds to the end surface of the other side of the L-shape of the L-shaped armature.

4. The snap-on bistable magnetic circuit structure according to claim 3, characterized in that: In the bistable magnetic circuit, when the inner side surface of the end of one side of the L-shape of the L-shaped armature is in contact with the end surface of the other side of the L-shape of the L-shaped yoke, so that the working air gap at one of the two opposite corners of the frame is smaller than the working air gap at the other corner, the L-shaped armature is in a stable state; when the inner side surface of the end of one side of the L-shape of the L-shaped yoke is in contact with the end surface of the other side of the L-shape of the L-shaped armature, so that the working air gap at the other corner of the two opposite corners of the frame is smaller than the working air gap at the one corner, the L-shaped armature is in another stable state.

5. The snap-on bistable magnetic circuit structure according to any one of claims 2 to 4, characterized in that: The magnetic steel is located between the middle of one side of the L-shape of the L-shaped yoke and the middle of one side of the L-shape of the L-shaped armature.

6. The snap-on bistable magnetic circuit structure according to claim 5, characterized in that: The length dimension of one side of the L-shape of the L-shaped armature is greater than the length dimension of the other side of the L-shape of the L-shaped armature; the length dimension of one side of the L-shape of the L-shaped yoke is greater than the length dimension of the other side of the L-shape of the L-shaped yoke.

7. The snap-on bistable magnetic circuit structure according to claim 2, wherein: The coil includes a coil frame and an enameled wire wound around the winding window of the coil frame. One side of the L-shape of the L-shaped yoke is inserted into the iron core mounting hole of the coil frame. The middle of the winding window of the coil frame is provided with a magnetic steel mounting hole facing one side of the L-shape of the L-shaped armature. The magnetic steel mounting hole is connected to the iron core mounting hole, and the magnet is adapted to be mounted in the magnetic steel mounting hole of the coil frame.

8. The snap-on bistable magnetic circuit structure according to claim 7, characterized in that: One side of the L-shaped armature is swingably matched with the L-shaped yoke with the other end of the magnetic steel as a rotation support point, thereby realizing a seesaw motion.

9. The snap-on bistable magnetic circuit structure according to claim 8, characterized in that: The end face of the other end of the magnet is integrally formed with a first protrusion, and the first protrusion of the magnet abuts against the inner side surface of one side of the L-shape of the L-shaped armature, so that one side of the L-shape of the L-shaped armature can swingably cooperate with the L-shaped yoke with the other end of the magnet as a rotation support point.

10. The snap-on bistable magnetic circuit structure according to claim 8, characterized in that: The inner side surface of one of the L-shaped sides of the L-shaped armature is integrally formed with a second protrusion, and the second protrusion of one of the L-shaped sides of the L-shaped armature abuts against the end surface of the other end of the magnet, so that one of the L-shaped sides of the L-shaped armature can swingably cooperate with the L-shaped yoke with the other end of the magnet as a rotation support point.

11. The snap-on bistable magnetic circuit structure according to claim 8, characterized in that: A magnetic conductive part is also installed between the other end of the magnetic steel and one of the L-shaped sides of the L-shaped armature. The end of the magnetic conductive part that is connected to one of the L-shaped sides of the L-shaped armature is integrally formed with a third protrusion, so that one of the L-shaped sides of the L-shaped armature can be swingably matched with the L-shaped yoke with the corresponding end of the magnetic conductive part as the rotation support point.

12. The snap-on bistable magnetic circuit structure according to claim 8, 9, 10 or 11, characterized in that: A limiting shaft is provided on both sides of the width of one side of the L-shape of the L-shaped armature, and the center line of the limiting shaft intersects perpendicularly with the line from one end of the magnetic steel to the other end and passes through the rotation support point or the extension line; the coil frame is provided with a fourth protrusion extending in the direction of one side of the L-shape of the L-shaped armature, and the fourth protrusion is provided with a groove adapted to the limiting shaft on one side of the L-shape of the L-shaped armature, and the limiting shaft of the L-shaped armature can be rotatably limited and fitted in the groove of the fourth protrusion of the coil frame.

13. The snap-on bistable magnetic circuit structure according to claim 12, characterized in that: The center line of the limiting rotating shaft coincides with the rotation support point.

14. The snap-on bistable magnetic circuit structure according to claim 12, wherein: The groove of the fourth protrusion of the coil frame is matched with the limiting rotating shaft of the L-shaped armature in an arc shape.

15. The snap-on bistable magnetic circuit structure according to claim 12, wherein: The rotating shaft of the L-shaped armature is a fifth protrusion integrally formed on both sides of the width of one side of the L-shape of the L-shaped armature.

16. The snap-on bistable magnetic circuit structure according to claim 12, wherein: One side of the L-shape of the L-shaped armature is also partially covered with a plastic part, and the rotating shaft of the L-shaped armature is a sixth protrusion integrally formed on the plastic part on both sides corresponding to the width of one side of the L-shape of the L-shaped armature.

17. The snap-on bistable magnetic circuit structure according to claim 8, 9, 10 or 11, characterized in that: A compression spring is further connected to one side of the L-shape of the L-shaped armature, and one side of the L-shape of the L-shaped armature is connected to the coil frame through the compression spring.

18. The snap-on bistable magnetic circuit structure according to claim 17, characterized in that: The compression spring includes a main plate body and wings bent from both sides of the main plate body and protruding toward one side. One side of the L-shape of the L-shaped armature that is away from one side of the L-shape of the L-shaped yoke is protruding outward and is provided with a convex bud. The main plate body is provided with a first clamping hole. The first clamping hole of the main plate body corresponds to the convex bud on one side of the L-shape of the L-shaped armature. The wings of the compression spring extend toward the coil frame and are connected to the coil frame.

19. The snap-on bistable magnetic circuit structure according to claim 18, characterized in that: The wing of the compression spring is provided with a second clamping hole, and a clamping block is provided at a corresponding position of the coil frame. The second clamping hole of the wing of the compression spring is clamped and matched with the clamping block of the coil frame.

20. The snap-on bistable magnetic circuit structure according to claim 19, characterized in that: The second card hole of the wing of the compression spring is long and narrow, and a card is provided on one side of the second card hole; the side of the card block facing the main plate of the compression spring is provided with an inclined surface, and the side of the card block facing away from the main plate of the compression spring is set as a straight surface; the card of the second card hole cooperates with the straight surface of the card block.

21. The snap-on bistable magnetic circuit structure according to claim 18, wherein: A recess is provided on one side of the L-shape of the L-shaped armature facing away from one side of the L-shape of the L-shaped yoke, and the compression spring is provided with an elastic tongue corresponding to the recess, and the elastic tongue of the compression spring rests in the recess on one side of the L-shape of the L-shaped armature.

22. The snap-on bistable magnetic circuit structure according to claim 7, characterized in that: A preset second gap is provided between one side of the L-shape of the L-shaped armature and the other end of the magnet; a rotating shaft is provided on both sides of the width of the L-shape of the L-shaped armature, corresponding to the extension line of the line connecting one end to the other end of the magnet, so as to realize seesaw-like motion by using the rotating shaft; the coil frame is provided with a support portion for supporting the rotating shaft of the L-shaped armature.

23. A magnetic latching relay, characterized in that: It includes a base, a static spring part, a dynamic spring part, a push card and a snap-fit ​​bistable magnetic circuit structure as described in any one of claims 1 to 22, wherein the snap-fit ​​bistable magnetic circuit structure and the static spring part and the dynamic spring part are respectively installed on the base, and the push card is connected between one side of the L-shape of the L-shaped armature of the snap-fit ​​bistable magnetic circuit structure and the dynamic spring piece of the dynamic spring part.

24. The magnetic latching relay according to claim 23, wherein: The base and the coil frame of the coil of the snap-fit ​​bistable magnetic circuit structure are an integral injection-molded unit; the base is also provided with a through hole for facilitating the installation of the L-shaped armature.

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