A driving mechanism for magnetic latching relay, magnetic latching relay and assembly process

Abstract

The present invention discloses a driving mechanism applied to a magnetic holding relay, comprising an insulating seat, an armature assembly and a push card for pushing a movable spring to move, the armature assembly is provided with a pivot shaft, the armature assembly is rotatably pivoted to the insulating seat through the pivot shaft, the armature assembly is also provided with a driving shaft, the driving shaft is parallel to the pivot shaft, a matching hole is provided on the push card, the driving shaft is inserted into the matching hole on the push card along the axial direction of the pivot shaft; when the armature assembly rotates, the outer surface of the driving shaft cooperates with the inner surface of the matching hole to drive the push card to move back and forth. The driving mechanism of the present invention has good assembly performance, can realize automatic assembly, so as to improve assembly efficiency and reduce production costs, and the operation is also relatively reliable. The present invention also provides a magnetic holding relay using the above-mentioned driving mechanism and an assembly process thereof.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic latching relay manufacturing, in particular to a driving mechanism applied to the magnetic latching relay, the magnetic latching relay and an assembly process. Background Art

[0002] The magnetic latching relay is a new type of relay developed in recent years, and is also an automatic switch. Like other electromagnetic relays, it automatically connects and disconnects the circuit. The difference is that the normally closed or normally open state of the magnetic latching relay is completely dependent on the action of the permanent magnet, and the switching state conversion is completed by triggering a pulse electrical signal of a certain width.

[0003] Existing magnetic latching relays usually include an insulating seat, multiple conductive lead pins, a magnetic circuit system, a contact system, and a driving mechanism. Multiple conductive lead pins, a magnetic circuit system, a contact system, and a driving mechanism are all mounted on the insulating seat. The contact system includes a moving spring and a static spring. The moving spring is provided with a moving contact, and the static spring is provided with a static contact. The driving mechanism includes an armature assembly and a push card. The armature assembly is connected to the push card, and the push card is connected to the moving spring. One end of the conductive lead pin in the insulating seat is fixedly connected to the moving spring or the static spring. The armature assembly drives the push card to move back and forth, and the push card drives the moving spring to shift so that the moving contact engages or disengages with the static contact, which automatically connects and disconnects the circuit.

[0004] On May 23, 2017, an invention patent with the patent number ZL201510211983.8 and the name of "A driving mechanism of a multi-channel magnetic latching relay with simple installation and reliable limit" was disclosed, which includes a driving block, an armature part and at least two groups of movable spring parts; the armature part and the movable spring part are respectively matched with the driving block; the driving block is provided with a first clamping groove matched with the armature part and at least two second clamping grooves matched with the movable spring part; the first clamping groove of the driving block is provided with a first limiting part to prevent the driving block from moving in both directions in the thickness direction with the cooperation of the armature part; only one of the at least two second clamping grooves of the driving block is provided with a second limiting part, and the movable spring part is provided with a third clamping groove, and the second limiting part of the driving block and the third clamping groove of the movable spring part cooperate to prevent the driving block from moving in both directions in the width direction. The present invention realizes a stable limit function by improving the structure of the driving block and its movable spring part, and utilizing the mutual cooperation between the driving block, the movable spring part and the armature part. However, it can be seen from the specific implementation method and the drawings in the specification that this pushing mechanism still has the following problems: 1. Figure 5 and attached Figure 7It can be seen that when the push arm 11 of the armature part is to be installed into the first slot 31 of the push block 3, since the direction in which the armature part is installed on the base is inconsistent with the direction in which the push arm 11 is installed into the first slot 31, and the first slot 31 is also provided with two first limit parts 311, it is necessary to manually tilt the armature part and install the push arm 11 into the first slot 31 of the push block 3 from the side of the push block 3 before the armature part can be installed on the base. In this way, automated operation cannot be achieved, resulting in low assembly efficiency. 2. Combined with its attachment Figure 3 , Attachment Figure 7 It can be seen that there is a position difference between the push-pull point of the push arm 11 driving the push block 3 and the push-pull point of the push block 3 and the moving spring 2, and they are not on the same plane. During the movement of the push block 3, a downward rotation torque is generated, which increases the resistance of the movement of the push block 3, resulting in the risk of the armature part being in an intermediate state, that is, there is a risk of the relay not operating. Figure 7 It can be seen that the push arm 11 of the armature part is larger in the middle and smaller at the top and bottom. The contact area between the push arm 11 of the armature part and the inner wall of the first slot 31 of the push block 3 is small. The push block 3 is easy to rotate around the push arm 11 of the armature part, which is easy to generate movement resistance and the limit is also relatively unreliable. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a driving mechanism applied to a magnetic latching relay, which has good assembly performance and can realize automatic assembly to improve assembly efficiency and reduce production costs, and the operation is also relatively reliable.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present invention is: a driving mechanism applied to a magnetic latching relay, comprising an insulating seat, an armature assembly and a push card for pushing a moving spring to move, the armature assembly is provided with a pivot shaft, the armature assembly is rotatably pivoted to the insulating seat through the pivot shaft, the armature assembly is also provided with a driving shaft, the driving shaft is parallel to the pivot shaft, a matching hole is provided on the push card, the driving shaft is inserted into the matching hole on the push card along the axial direction of the pivot shaft; when the armature assembly rotates, the outer surface of the driving shaft cooperates with the inner surface of the matching hole to drive the push card to move back and forth;

[0007] The armature on the armature assembly is located at the upper part of the insulating seat body, and the part of the driving shaft that contacts the push card matching hole is located at the lower part of the insulating seat body.

[0008] Preferably, the armature assembly includes a square bracket and two armatures, the two armatures are fixed in parallel on the square bracket, the two ends of each armature extend from the left and right sides of the square bracket respectively, the upper end of the pivot shaft extends from the upper end surface of the square bracket, a permanent magnet is also installed in the middle of the square bracket, the lower end of the pivot shaft extends from the lower end surface of the square bracket, a support plate extends outward from the lower part of the front side surface of the square bracket, and the drive shaft is fixedly connected to the support plate.

[0009] As a further improvement, a reinforcement protrusion extends outwards from both sides of the upper part of the drive shaft, and the upper side of each reinforcement protrusion is fixedly connected to the support plate. In this way, the two reinforcement protrusions can not only enhance the rigidity of the drive shaft, but also form shoulders on the lower sides of the two reinforcement protrusions to play a role in limiting the mutual position of the push card.

[0010] As a further improvement, the inner surface of the matching hole near one end of the armature assembly is expanded outward, and the inner surface of the matching hole expanded outward does not contact the drive shaft. The outward expanded portion that does not contact the drive shaft facilitates the insertion of the drive shaft into the matching hole, and the contact portion between the drive shaft and the inner surface of the matching hole can be better controlled, so that the push-pull point between the drive shaft and the push card can be better controlled to obtain a better force position and improve the push reliability.

[0011] As a further improvement, the cross-section of the contact portion between the mating hole and the drive shaft is generally rectangular, the short side of the rectangular cross-section is parallel to the moving direction of the push card, the long side of the rectangular cross-section is perpendicular to the moving direction of the push card, and the cross-section of the contact portion between the drive shaft and the mating hole is circular.

[0012] Furthermore, the diameter of the circular cross section is 0.1mm-0.2mm smaller than the distance between the two long sides of the rectangular cross section, and the four corners of the rectangular cross section are arc-shaped, so as to facilitate assembly and ensure the reliability of the drive shaft driving the push card to move back and forth, and reduce the vibration amplitude of the push card.

[0013] As a further improvement, the symmetry plane of the contact portion between the drive shaft and the inner surface of the matching hole is in the same plane as the symmetry plane of the push card driving spring, so that the push card will not generate downward rotation torque during movement, effectively reducing the movement resistance of the push card and improving the reliability of the movement.

[0014] Preferably, the push card is provided with at least two H-shaped movable spring clamping parts, and the matching hole is located between the two movable spring clamping parts; when there are more than two H-shaped movable spring clamping parts on the push card, after each H-shaped movable spring clamping part is clamped with a clamping end of a movable spring, only the two H-shaped movable spring clamping parts on the outermost side of the push card cooperate with the movable spring to limit the push card. In this way, when the push card is clamped with more movable springs, it can prevent the difficulty of assembling in place due to multiple limit points, improve assembly efficiency, reduce stress influence, and make the push card move more smoothly in the moving direction.

[0015] Preferably, the matching hole is a blind hole to ensure the strength of the push card.

[0016] The drive mechanism of the present invention has a drive shaft on the armature assembly, the drive shaft is parallel to the pivot axis on the armature assembly, a matching hole is provided on the push card, the drive shaft is inserted into the matching hole on the push card along the axial direction of the pivot axis, and when the armature assembly rotates, the outer surface of the drive shaft matches the inner surface of the matching hole to drive the push card to move back and forth. In this way, when assembling the armature assembly, the armature assembly can be installed into the insulating seat body and the push card in one direction, which is convenient for assembly by machine, realizing automated operation, improving assembly efficiency, and reducing production costs.

[0017] On the other hand, since the push card is driven to move by the cooperation between the outer surface of the drive shaft and the inner surface of the matching hole, the contact area between the outer surface of the drive shaft and the inner surface of the matching hole is larger. During the movement, the push card is not easy to rotate with the drive shaft, which can reduce the movement resistance generated by the push card and make the action more reliable.

[0018] The present invention also provides a magnetic holding relay, comprising a plurality of moving springs, a plurality of static springs and a plurality of conductive lead-out pins, each moving spring being provided with a moving contact, one end of each moving spring being fixedly connected to one end of a conductive lead-out pin, each static spring being provided with a static contact, each static spring being fixedly connected to one end of a conductive lead-out pin, and also comprising the above-mentioned driving mechanism, the other end of each conductive lead-out pin extending out of the insulating seat body, the other end of each moving spring being clamped on a pushing card, a coil being mounted on the insulating seat body, an iron core being mounted in the middle of the coil, two yokes being fixedly connected on both sides of the coil, the yoke, the iron core and the armature and permanent magnet on the armature assembly forming a magnetic conductive circuit, the driving shaft on the armature assembly driving the pushing card to move back and forth so that each of the moving contacts engages with or separates from a corresponding static contact.

[0019] Further improvement, there are three moving springs, three static springs, six conductive lead pins, the coil is fixedly connected to the upper part of the insulating seat body, the upper part of the insulating seat body is provided with a lower pivot hole, the armature assembly uses the lower end of the pivot shaft to insert into the lower pivot hole of the upper part of the insulating seat body, the upper part of the insulating seat body is also fixedly connected to a pressure block with two connecting pins, the upper part of the insulating seat body is provided with two connecting pin mounting holes, each connecting pin is inserted into one connecting pin mounting hole, the pressure block is provided with an upper pivot hole, the upper pivot hole matches with the upper end of the pivot shaft, the upper end of the insulating seat body is fixedly connected to an upper cover, all the moving springs, static springs, conductive lead pins and the push card are installed at the lower part of the insulating seat body, the lower end of the insulating seat body is fixedly connected to a lower cover, and the other ends of all the conductive lead pins extend out of the insulating seat body from the front side of the insulating seat body. Such an arrangement structure can make the length and width dimensions of the entire magnetic latching relay smaller and form a three-phase structure, which is conducive to the use with a three-phase smart meter.

[0020] As a further improvement, a micro switch is also installed on the upper part of the insulating seat, and a touch portion is extended upward from the push card, and when the push card moves back and forth, the touch portion presses or releases the micro switch touch reed. In this way, the working state of the magnetic latching relay is easily monitored through the output signal of the micro switch.

[0021] The magnetic latching relay of the present invention adopts the above-mentioned driving mechanism, so the assembly performance is effectively improved, which facilitates the realization of automatic assembly and reduces the manufacturing cost; and the moving resistance of the push card is small, thereby improving the reliability of the operation of the magnetic latching relay.

[0022] The present invention also provides an assembly process of the magnetic latching relay, comprising the following steps:

[0023] Step 1: Position one end of three movable springs fixedly connected with conductive lead pins in a parallel state, position three static springs fixedly connected with conductive lead pins corresponding to the positions of the three movable springs respectively, and then push the push card toward the movable springs so that the other ends of the three movable springs are clamped on the push card to form an assembly;

[0024] Step 2, pressing the insulating seat body from top to bottom, so that the assembly formed in step 1 and three static springs connected with the conductive lead pins are simultaneously inserted into the preset position at the lower part of the insulating seat body and the other ends of all the conductive lead pins are extended out of the insulating seat body from the front side of the insulating seat body;

[0025] Step 3: Insert the coil connected with the yoke into the preset position on the upper part of the insulating seat, and lead the power lead of the coil from the rear side of the insulating seat;

[0026] Step 4: Install the armature assembly into the upper part of the insulating seat from top to bottom, so that the pivot shaft on the armature assembly is inserted into the preset position on the insulating seat, and at the same time, the drive shaft is inserted into the matching hole on the push card along the axial direction of the pivot shaft;

[0027] Step 5: Use the two connecting pins on the pressing block to insert into the preset positions on the insulating seat body so that the upper pivot hole on the pressing block matches with the upper end of the pivot shaft;

[0028] Step 6: Install the micro switch on the upper part of the insulating seat body and make the micro switch trigger the reed to correspond to the touch part on the push card;

[0029] Step 7: Fix the upper cover to the insulating base, then turn over the insulating base and fix the lower cover to the insulating base.

[0030] The assembly process provided by the present invention first positions one end of the three movable springs fixedly connected with the conductive lead-out pins into a parallel state, positions the three static springs fixedly connected with the conductive lead-out pins respectively corresponding to the positions of the three movable springs, and then pushes the pushing card toward the movable spring so that the other ends of the three movable springs are clamped on the pushing card to form an assembly; then the insulating seat body is pressed from top to bottom so that the assembly formed in step one and the three static springs fixedly connected with the conductive lead-out pins are simultaneously clamped into the preset positions of the lower part of the insulating seat body and the other ends of all the conductive lead-out pins are extended out of the insulating seat body from the front side of the insulating seat body, thus solving the problems of troublesome installation and positioning and slow installation speed; and the pivot shaft on the armature assembly is inserted into the preset position on the insulating seat body, and at the same time, the drive shaft is inserted into the matching hole on the pushing card along the axial direction of the pivot shaft. The assembly direction is single, which is conducive to realizing automatic assembly. Therefore, the steps are relatively simple, the assembly speed is fast, and automatic assembly can be realized, which can effectively improve production efficiency and reduce manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a front view of the insulating base hidden in the driving mechanism of the present invention;

[0032] Figure 2 yes Figure 1 AA section enlarged view;

[0033] Figure 3 is a three-dimensional view of the armature assembly of the present invention;

[0034] Figure 4 is a three-dimensional diagram of a push card of the present invention;

[0035] Figure 5 It is a three-dimensional diagram of a magnetic latching relay of the present invention;

[0036] Figure 6 yes Figure 5 A top view of a three-dimensional image with the upper cover hidden;

[0037] Figure 7 yes Figure 6 Hide multiple parts stereograms;

[0038] Figure 8 is a three-dimensional diagram of the insulating base of the present invention;

[0039] Fig. 9 yes Figure 5 Bottom view with lower cover hidden;

[0040] Fig.10 yes Figure 5 Top view with the upper cover hidden;

[0041] Fig.11 yes Fig.10 BB cross-section enlarged view;

[0042] Fig.12 yes Fig.10 Magnified cross-sectional view of CC. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] Figures 1 to 5 As shown, a driving mechanism applied to a magnetic holding relay includes an insulating seat, an armature assembly 1 and a push card 3 for pushing a movable spring 2 to move, the armature assembly 1 is provided with a pivot shaft 11, the armature assembly 1 is rotatably pivoted to the insulating seat through the pivot shaft 11, the armature assembly 1 is also provided with a drive shaft 12, the drive shaft 12 is parallel to the pivot shaft 11, a matching hole 31 is provided on the push card 3, the drive shaft 12 is inserted into the matching hole 31 on the push card 3 along the axial direction of the pivot shaft 11; when the armature assembly 1 rotates, the push card 3 is driven to move back and forth by the outer surface of the drive shaft 12 cooperating with the inner surface of the matching hole 31.

[0045] The armature assembly 1 includes a block-shaped bracket 13 and two armatures 14, the two armatures 14 are fixedly mounted on the block-shaped bracket 13 in parallel, the two ends of each armature 14 extend from the left and right sides of the block-shaped bracket 13 respectively, a permanent magnet is also installed in the middle of the block-shaped bracket 13, the upper end of the pivot shaft 11 extends from the upper end face of the block-shaped bracket 13, the lower end of the pivot shaft 11 extends from the lower end face of the block-shaped bracket 13, the pivot shaft 11 and the block-shaped bracket 13 form an integral structure, a support plate 121 extends outward from the lower part of the front side face of the block-shaped bracket 13, and the drive shaft 12 is fixedly connected to the support plate 121. Two grooves 131 are provided on the left and right sides of the block-shaped bracket 13 between the two armatures 14 to facilitate positioning of the permanent magnet when the two armatures 14 are installed.

[0046] Both sides of the upper part of the driving shaft 12 extend outwards with a reinforcement protrusion 122, and the upper side of each reinforcement protrusion 122 is fixedly connected to the support plate 121. A plurality of reinforcement ribs 123 are also provided between the upper side of the support plate 121 and the front side of the block-shaped bracket 13. The push card 3 is provided with three H-shaped spring clamping parts 32, and the matching hole 31 is a blind hole. The matching hole 31 is located between two of the spring clamping parts 32 to ensure the strength of the push card. The push card 3 also extends upwards with a touch part 33 that matches the micro switch touch spring.

[0047] After each H-shaped movable spring clamping portion 32 on the push card 3 is clamped with a clamping end of a movable spring 2, only the two H-shaped movable spring clamping portions 32 on the outermost side of the push card 3 cooperate with the movable spring 3 to limit the push card 3. The clamping end of the middle movable spring 3 does not participate in the limit after being clamped with the H-shaped movable spring clamping portion 32 in the middle of the push card 3 (see Figure 7 As shown, after the clamping end of the middle movable spring 3 is clamped with the middle H-shaped movable spring clamping part 32 of the pushing card 3, there is a gap in the Z direction and Y direction perpendicular to the moving direction of the pushing card 3, which does not participate in the limiting. In this way, it can prevent the difficulty of assembling at the same time of three points, improve the assembly efficiency, reduce the influence of stress, and make the pushing card 3 move more smoothly in the moving direction.

[0048] Further integration Figure 1 , Figure 4 As shown, the inner surface of the matching hole 31 close to one end of the armature assembly 1 is expanded outward, and the inner surface of the matching hole 31 expanded outward does not contact the driving shaft 12.

[0049] Recombination Figure 1 , Figure 2 , Figure 4 As shown, the cross-section of the contact portion between the matching hole 31 and the drive shaft 12 is generally rectangular, the short side 31a of the rectangular cross-section is parallel to the moving direction of the push card 3, the long side 31b of the rectangular cross-section is perpendicular to the moving direction of the push card 3, and the cross-section of the contact portion between the drive shaft 12 and the matching hole 31 is circular.

[0050] In order to facilitate assembly and ensure the reliability of the drive shaft 12 driving the push card 3 to move back and forth and reduce the vibration amplitude of the push card, the diameter of the circular cross section is 0.1mm-0.2mm smaller than the distance between the two long sides 31b of the rectangular cross section, and the four corners of the rectangular cross section are arc-shaped.

[0051] The symmetry plane of the contact portion between the drive shaft 12 and the inner surface of the matching hole 31 and the symmetry plane of the push card 3 driving the dynamic spring 2 are in the same plane. Figure 1The aa plane shown in the figure will not generate torque when driving the push card 3, which will better reduce the movement resistance of the push card 3.

[0052] Figures 5 to 12 As shown, a magnetic latching relay comprises the above-mentioned driving mechanism and three moving springs 2, three static springs 4 and six conductive lead pins 5. The above-mentioned driving mechanism comprises an insulating seat body 10, an armature assembly 1 and a push card 3 for pushing the moving spring 2 to move. Each moving spring 2 is provided with two moving contacts 21, one end of each moving spring 2 is fixedly connected to one end of a conductive lead pin 5, and each static spring 4 is provided with two static contacts 41. In this embodiment, the static spring 4 and the static contact 41 are an integrated structure, and each static spring 4 is fixedly connected to one end of a conductive lead pin 5. The ends are fixedly connected, and the other end of each conductive lead-out pin 5 extends out of the insulating seat body 10. The other end of each movable spring 2 is clamped on the pushing card 3. The insulating seat body 10 is also equipped with a coil 6, and an iron core 61 is installed in the middle of the coil 6. Two yokes 7 are fixedly connected on both sides of the coil 6. The yoke 7, the iron core 61, the armature 14 on the armature assembly 1, and the permanent magnet constitute a magnetic circuit. The driving shaft 12 on the armature assembly 1 drives the pushing card 3 to move back and forth so that each of the moving contacts 21 is engaged with or separated from a corresponding static contact 41.

[0053] The coil 6 is fixedly connected to the upper part of the insulating seat body 10, and a lower pivot hole 101 is provided on the upper part of the insulating seat body 10. The armature assembly 1 is inserted into the lower pivot hole 101 on the upper part of the insulating seat body 10 by using the lower end of the pivot shaft 11. The upper part of the insulating seat body 10 can also be detachably fixedly connected to a pressing block 8 with two connecting pins 81. The upper part of the insulating seat body 10 is provided with two connecting pin mounting holes 102, and each connecting pin 81 is inserted into a connecting pin mounting hole 102. An upper pivot hole 82 is provided on the pressing block 8, and the upper pivot hole 82 cooperates with the upper end of the pivot shaft 11. The upper end of the insulating seat body 10 is fixedly connected with an upper cover 103, all the dynamic springs 2, static springs 4, conductive lead pins 5 and the push card 3 are installed at the lower part of the insulating seat body 10, and the lower end of the insulating seat body 10 is fixedly connected with a lower cover 104, and the other ends of all the conductive lead pins 5 extend out of the insulating seat body 10 from the front side of the insulating seat body 10. The upper cover 103 and the lower cover 104 can be further fixedly connected to the insulating base body 10 by screws.

[0054] The upper part of the insulating seat 10 is also equipped with a micro switch 9. When the push card 3 moves back and forth, the touch portion 33 on the push card 3 presses the micro switch 9 to touch the reed or releases the micro switch 9 to touch the reed. The micro switch 9 outputs a signal to facilitate monitoring the working state of the relay.

[0055] The power lead wire 62 of the coil 6 and the lead wire 91 of the micro switch 9 are led out from the rear side of the insulating base body 10 .

[0056] The magnetic latching relay of this embodiment can constitute a three-phase high-power magnetic latching relay, which can be conveniently used in conjunction with a smart meter.

[0057] In this embodiment, the insulating seat body 10, the push card 3, the pressing block 8 and the square-shaped bracket 13 of the armature assembly 1 are all injection molded.

[0058] The assembly process of the magnetic latching relay in the above embodiment is as follows: Figures 5 to 12 , including the following steps:

[0059] Step 1: Position one end of three movable springs 2 fixedly connected with conductive lead pins 5 in parallel, position three static springs 4 fixedly connected with conductive lead pins 5 corresponding to the positions of three movable springs 3 respectively, and then push the push card 3 toward the movable spring 2 so that the other ends of the three movable springs 2 are clamped on the push card 3 to form an assembly;

[0060] Step 2: Press the insulating seat 10 from top to bottom, so that the assembly formed in step 1 and the three static springs 4 connected with the conductive lead pins 5 are simultaneously inserted into the preset position at the bottom of the insulating seat 10 and the other ends of all the conductive lead pins 5 extend out of the insulating seat 10 from the front side of the insulating seat 10;

[0061] Step 3: insert the coil 6 connected with the yoke 7 into the preset position on the upper part of the insulating seat 10, and lead the power lead 62 on the coil 6 from the rear side of the insulating seat 10;

[0062] Step 4: Install the armature assembly 1 into the upper part of the insulating seat body 10 from top to bottom, so that the pivot shaft 11 on the armature assembly 1 is inserted into the preset position on the insulating seat body 10, and at the same time, the drive shaft 12 is inserted into the matching hole 31 on the push card 3 along the axial direction of the pivot shaft 11;

[0063] Step 5: Use the two connecting pins 81 on the pressing block 8 to insert into the preset positions on the insulating seat 10, so that the upper pivot hole 82 on the pressing block 8 matches with the upper end of the pivot shaft 11;

[0064] Step 6: Install the micro switch 9 on the upper part of the insulating seat 10 and make the two springs of the micro switch 9 correspond to the touch portion 33 on the push card 3, and the lead wire 91 of the micro switch 9 is led out from the rear side of the insulating seat 10;

[0065] Step 7: snap-fit ​​the upper cover 103 onto the insulating base 10 , then flip the insulating base 10 over and snap-fit ​​the lower cover 104 onto the insulating base 10 .

[0066] The above are only preferred embodiments provided by the present invention. Any equivalent changes made by those skilled in the art according to the claims shall fall within the protection scope of this case.

Claims

1. A driving mechanism for a magnetic latching relay, comprising an insulating seat, an armature assembly and a push card for pushing a movable spring to move, wherein the armature assembly is provided with a pivot shaft, and the armature assembly is rotatably pivoted to the insulating seat through the pivot shaft, and characterized in that: The armature assembly is also provided with a driving shaft, which is parallel to the pivot axis, and the push card is provided with a matching hole, and the driving shaft is inserted into the matching hole on the push card along the axial direction of the pivot axis; when the armature assembly rotates, the outer surface of the driving shaft matches with the inner surface of the matching hole to drive the push card to move back and forth; The armature on the armature assembly is located at the upper part of the insulating seat body, and the part of the driving shaft that contacts the push card matching hole is located at the lower part of the insulating seat body.

2. The driving mechanism for a magnetic latching relay according to claim 1, characterized in that: The armature assembly includes a square bracket and two armatures, the two armatures are fixed in parallel on the square bracket, the two ends of each armature extend from the left and right sides of the square bracket respectively, the upper end of the pivot shaft extends from the upper end surface of the square bracket, a permanent magnet is also installed in the middle of the square bracket, the lower end of the pivot shaft extends from the lower end surface of the square bracket, a support plate extends outward from the lower part of the front side surface of the square bracket, and the drive shaft is fixedly connected to the support plate.

3. The driving mechanism for a magnetic latching relay according to claim 2, characterized in that: A reinforcement protrusion extends outwardly from both sides of the upper portion of the driving shaft, and the upper side of each reinforcement protrusion is fixedly connected to the support plate.

4. The driving mechanism for a magnetic latching relay according to claim 1, characterized in that: The inner surface of the matching hole close to one end of the armature assembly is expanded outwards, and the inner surface of the matching hole expanded outwards does not contact the driving shaft.

5. The driving mechanism for a magnetic latching relay according to claim 1, characterized in that: The cross-section of the contact portion between the matching hole and the drive shaft is generally rectangular, the short side of the rectangular cross-section is parallel to the moving direction of the push card, the long side of the rectangular cross-section is perpendicular to the moving direction of the push card, and the cross-section of the contact portion between the drive shaft and the matching hole is circular.

6. The driving mechanism for a magnetic latching relay according to claim 5, characterized in that: The diameter of the circular cross section is 0.1 mm to 0.2 mm smaller than the distance between the two long sides of the rectangular cross section, and the four corners of the rectangular cross section are in arc shape.

7. The driving mechanism for a magnetic latching relay according to claim 1, characterized in that: The symmetry plane of the contact portion between the driving shaft and the inner surface of the matching hole is in the same plane as the symmetry plane of the push card driving spring.

8. The driving mechanism for a magnetic latching relay according to claim 1, characterized in that: The push card is provided with at least two H-shaped movable spring clamping parts, and the matching hole is located between the two movable spring clamping parts; When there are more than two H-shaped moving spring clamping parts on the push card, after each H-shaped moving spring clamping part is clamped with a clamping end of a moving spring, only the two H-shaped moving spring clamping parts on the outermost side of the push card cooperate with the moving spring to limit the push card.

9. A magnetic latching relay, comprising a plurality of moving springs, a plurality of static springs and a plurality of conductive lead pins, each moving spring being provided with a moving contact, one end of each moving spring being fixedly connected to one end of a conductive lead pin, each static spring being provided with a static contact, each static spring being fixedly connected to one end of a conductive lead pin, characterized in that: It also includes the driving mechanism described in any one of claims 1 to 8, wherein the other end of each conductive lead-out pin extends out of the insulating seat body, the other end of each movable spring is clamped on the push card, a coil is mounted on the insulating seat body, an iron core is mounted in the middle of the coil, two yokes are fixedly connected on both sides of the coil, the yoke, the iron core, the armature and the permanent magnet on the armature assembly constitute a magnetic conductive circuit, and the driving shaft on the armature assembly drives the push card to move back and forth so that each of the movable contacts engages or separates with a corresponding static contact.

10. A magnetic latching relay according to claim 9, characterized in that: There are three moving springs, three static springs, and six conductive lead-out pins. The coil is fixedly connected to the upper part of the insulating seat body, and a lower pivot hole is provided on the upper part of the insulating seat body. The armature assembly utilizes the lower end of the pivot shaft to be inserted into the lower pivot hole on the upper part of the insulating seat body. A pressing block with two connecting pins is also fixedly connected to the upper part of the insulating seat body. Two connecting pin mounting holes are provided on the upper part of the insulating seat body, and each connecting pin is inserted into one connecting pin mounting hole. An upper pivot hole is provided on the pressing block, and the upper pivot hole cooperates with the upper end of the pivot shaft. An upper cover is fixedly connected to the upper end of the insulating seat body, and all the moving springs, static springs, conductive lead-out pins and the push card are installed on the lower part of the insulating seat body. The lower end of the insulating seat body is fixedly connected to the lower cover, and the other ends of all the conductive lead-out pins extend out of the insulating seat body from the front side of the insulating seat body.

11. A magnetic latching relay according to claim 10, characterized in that: A micro switch is also arranged on the upper part of the insulating seat body, and a touch portion is extended upwardly from the push card. When the push card moves back and forth, the touch portion presses or releases the micro switch touch reed.

12. An assembly process for the magnetic latching relay according to claim 11, comprising the following steps: Step 1: Position one end of three movable springs fixedly connected with conductive lead pins in a parallel state, position three static springs fixedly connected with conductive lead pins corresponding to the positions of the three movable springs respectively, and then push the push card toward the movable springs so that the other ends of the three movable springs are clamped on the push card to form an assembly; Step 2, pressing the insulating seat body from top to bottom, so that the assembly formed in step 1 and three static springs connected with the conductive lead pins are simultaneously inserted into the preset position at the lower part of the insulating seat body and the other ends of all the conductive lead pins are extended out of the insulating seat body from the front side of the insulating seat body; Step 3: Insert the coil connected with the yoke into the preset position on the upper part of the insulating seat, and lead the power lead of the coil from the rear side of the insulating seat; Step 4: Install the armature assembly into the upper part of the insulating seat from top to bottom, so that the pivot shaft on the armature assembly is inserted into the preset position on the insulating seat, and at the same time, the drive shaft is inserted into the matching hole on the push card along the axial direction of the pivot shaft; Step 5: Use the two connecting pins on the pressing block to insert into the preset positions on the insulating seat body so that the upper pivot hole on the pressing block matches with the upper end of the pivot shaft; Step 6: Install the micro switch on the upper part of the insulating seat body and make the micro switch trigger the reed to correspond to the touch part on the push card; Step 7: Fix the upper cover to the insulating base, then turn over the insulating base and fix the lower cover to the insulating base.

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