Magnetic latching relay

Abstract

The utility model relates to a magnetic latching relay which comprises a shell, a movable spring assembly and a static spring assembly are arranged in the shell, the movable spring assembly comprises a movable spring pin, a plurality of movable contacts and a plurality of conductive pins arranged on the movable spring pin, the conductive pins are arranged at intervals, the movable contacts are arranged on the conductive pins, and the static spring assembly is arranged on the static spring assembly. The static spring assembly comprises a static spring pin and a plurality of static contacts arranged on the static spring pin, and the static contacts and the movable contacts are correspondingly arranged.

Description

Technical Field

[0001] This application relates to the field of relays, and more particularly to a magnetic latching relay. Background Technology

[0002] A magnetic latching relay is an automatic switch that automatically connects and disconnects circuits. Unlike other electromagnetic relays, when the contacts of a magnetic latching relay are in the latching state, the coil does not need to be continuously energized; the magnetic force of the permanent magnet is sufficient to maintain the relay's state, thus greatly reducing power consumption and energy waste. The switching state transition is triggered by a pulse electrical signal of a certain width.

[0003] Existing magnetic latching relays often address the high current issue by increasing the overcurrent cross-sectional area and the contact diameter. However, the larger moving contact is prone to chattering due to inertia during relay switching, which significantly reduces product performance and lifespan. Utility Model Content

[0004] In order to solve the technical problem that the large size of the moving contact in the prior art leads to easy vibration during operation, this application provides a magnetic latching relay.

[0005] This application provides a magnetic latching relay, which adopts the following technical solution:

[0006] A magnetic latching relay includes a housing, within which a moving spring assembly and a stationary spring assembly are provided. The moving spring assembly includes a moving spring pin, a plurality of moving contacts, and a plurality of conductive pins disposed on the moving spring pin, wherein the conductive pins are spaced apart, and the moving contacts are disposed on each of the conductive pins. The stationary spring assembly includes a stationary spring pin and a plurality of stationary contacts disposed on the stationary spring pin, wherein the stationary contacts are correspondingly disposed to the moving contacts.

[0007] By adopting the above technical solution, and by setting multiple sets of moving and stationary contacts—that is, by splitting the moving contacts—the weight of a single moving contact is reduced. Simultaneously, the conductive pins are divided into multiple groups, making the multiple sets of moving contacts relatively independent and reducing mutual interference between them. This minimizes the impact of significant vibration on product performance and lifespan caused by the conductive pins during movement, and if one set of contacts fails, the remaining sets can still continue to operate.

[0008] Optionally, an arc-extinguishing grid is provided on the inner wall of the housing, and the arc-extinguishing grid is provided corresponding to the stationary contact and the moving contact.

[0009] By adopting the technical scheme, the arc between the moving contact and the static contact is separated into multiple short arcs by the arc extinguishing grid, and the arc is extinguished by the near-cathode effect when the current is zero, so that the arc extinguishing effect is good, and the possibility of melting the shell by the arc is reduced.

[0010] Optionally, the shell comprises a cover and a base, and the cover is snap-connected with the base.

[0011] By adopting the technical scheme, the snap-connection operation is convenient, and the shell is convenient to disassemble and assemble.

[0012] Optionally, the shell further comprises a pushing member, the pushing member is slidingly installed in the shell, and the pushing member is used for driving the conductive pin to swing.

[0013] By adopting the technical scheme, the structure is compact, compared with arranging the moving spring pin and the pushing member side by side, the space occupied by the shell in the width direction can be reduced, and compared with arranging the pushing member below the moving spring pin, the avoidance slot can maximize the thickness of the moving spring pin under the premise of saving space.

[0014] Optionally, the shell is provided with a guide plate and a guide block, and the pushing member is slidingly installed between the guide block and the guide plate.

[0015] By adopting the technical scheme, the guide plate and the guide block guide the movement of the pushing member, so that the movement of the pushing member is more stable.

[0016] Optionally, the shell further comprises an armature assembly, the armature assembly comprises a magnetic steel rotatingly installed in the shell, the magnetic steel is provided with a transmission member, the pushing member comprises a pushing rod and a magnetic steel transmission block arranged on the pushing rod, the magnetic steel transmission block is provided with a magnetic steel transmission slot, and the end portion of the transmission member is inserted into the magnetic steel transmission slot.

[0017] By adopting the technical scheme, the thickness of the pushing rod can be reduced by arranging the slotted magnetic steel transmission block on the pushing rod, space and raw materials are saved, and the linear movement of the pushing member is ensured not to be displaced under the premise of converting the rotation into linear movement by the transmission cooperation between the side wall of the magnetic steel transmission slot and the transmission member.

[0018] Optionally, the pushing member comprises a pushing rod and a moving spring transmission block arranged on the pushing rod, the side surface of the moving spring transmission block close to the conductive pin is provided with a moving spring transmission slot, the moving spring transmission slot extends away from the conductive pin, the conductive pin is provided with a transmission piece, and the end portions of the conductive pin and the transmission piece are located in the moving spring transmission slot and abut against two opposite slot walls of the moving spring transmission slot.

[0019] By adopting the technical scheme, the thickness of the push rod can be reduced, space and raw materials are saved, the thickness of the conductive pin can be reduced by the transmission cooperation between the side wall of the dynamic spring transmission groove and the transmission piece, and the linear motion of the pusher is ensured not to be displaced under the premise of changing linear motion into rotation.

[0020] Optionally, the transmission piece includes a piece body and a contact ball arranged on the piece body, and the contact ball is in contact with the groove wall of the dynamic spring transmission groove.

[0021] By adopting the technical scheme, compared with directly contacting the groove wall of the dynamic spring transmission groove through the piece structure, the contact ball is arranged, so that the transmission piece and the groove wall of the dynamic spring transmission groove are transformed into point contact, and the friction between the transmission piece and the dynamic spring transmission groove is reduced.

[0022] Optionally, the piece body is arranged in a curved manner, and a convex arc surface of the piece body faces the groove wall of the dynamic spring transmission groove in contact with the contact ball.

[0023] By adopting the technical scheme, the piece body is arranged in a curved manner, so that the end of the piece body avoids the side wall of the dynamic spring transmission groove, interference between the end of the piece body and the groove wall of the dynamic spring transmission groove is prevented, and the friction is reduced.

[0024] Optionally, the piece body is arranged in a curved manner, and a convex arc surface of the piece body faces the groove wall of the dynamic spring transmission groove in contact with the contact ball.

[0025] By adopting the technical scheme, the piece body is arranged in a curved manner, so that the end of the piece body avoids the side wall of the dynamic spring transmission groove, interference between the end of the piece body and the groove wall of the dynamic spring transmission groove is prevented, and the friction is reduced.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The weight of a single moving contact is reduced, a plurality of groups of moving contacts are relatively independent, the mutual influence between the groups of moving contacts is reduced, if a group of contacts fails, the remaining groups of contacts can still work;

[0028] 2. The arc extinguishing grid has a good arc extinguishing effect, and the possibility of melting the shell by the arc is reduced;

[0029] 3. The transmission piece and the groove wall of the dynamic spring transmission groove are in point contact, and the friction between the transmission piece and the dynamic spring transmission groove is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic diagram of embodiment 1 of the present application.

[0031] Figure 2 is an explosion schematic diagram of embodiment 1 of the present application.

[0032] Figure 3 is a schematic diagram of the internal structure of the shell of embodiment 1 of the present application.

[0033] Figure 4 is a structural schematic diagram of the upper cover in Embodiment 1 of the application.

[0034] Figure 5 is a structural schematic diagram of the base, the moving spring assembly and the static spring assembly in Embodiment 1 of the application.

[0035] Figure 6 is an assembly schematic diagram of the conductive pin and the push rod 41 in Embodiment 2 of the application.

[0036] Figure 7 is Figure 6 an enlarged view at A in FIG. 4.

[0037] BRIEF DESCRIPTION OF THE DRAWINGS 1, housing; 11, arc extinguishing grid; 12, upper cover; 121, clamping lug; 122, grid strip; 13, base; 131, clamping block; 132, protruding block; 133, grid slot; 2, coil assembly; 21, coil former; 22, yoke; 3, armature assembly; 31, magnetic steel; 32, transmission piece; 33, clamping plate; 331, rotating hole; 332, insertion block; 4, pusher; 41, push rod; 42, magnetic steel transmission block; 421, magnetic steel transmission slot; 43, moving spring transmission block; 431, moving spring transmission slot; 5, moving spring assembly; 51, moving spring pin; 511, avoiding slot; 52, conductive pin; 53, moving contact; 54, transmission sheet; 541, accommodating slot; 542, sheet body; 55, contact ball; 6, static spring assembly; 61, static spring pin; 62, static contact; 7, guide plate; 8, guide block; 81, insertion slot; 9, insertion block; 10, supporting block; 101, insertion hole. DETAILED DESCRIPTION

[0038] The application will be further described below in conjunction with the accompanying drawings. Figures 1-7 The application will be further described below in conjunction with the accompanying drawings.

[0039] Embodiment 1

[0040] Embodiment 1 of the application discloses a magnetic latching relay. Referring to Figure 1 The housing 1 comprises the upper cover 12 and the base 13 provided with an inner cavity, the upper cover 12 is integrally formed with the clamping lug 121 on each of the four side walls, the base 13 is integrally formed with the clamping block 131 corresponding to the clamping lug 121 on each of the four side walls, and the upper cover 12 and the base 13 are connected through the clamping lug 121 and the clamping block 131.

[0041] Referring to Figure 2, the shell 1 is provided with coil assembly 2, armature assembly 3, pusher 4, dynamic spring assembly 5 and static spring assembly 6, armature assembly 3 is driven by coil assembly 2 magnetically and rotates, armature assembly 3 is used to drive pusher 4 to move linearly, pusher 4 is used to drive dynamic spring assembly 5 to move to the direction of approaching static spring assembly 6 or moving away from static spring assembly 6.

[0042] Referring to Figure 2 , coil assembly 2 includes wire frame 21 and yoke 22, wire frame 21 is used to wind coil.

[0043] Referring to Figure 2 , armature assembly 3 includes magnetic steel 31, transmission member 32 and clamping plate 33. The bottom wall of the base 13 is integrally formed with a protrusion 132, and the center of the protrusion 132 is provided with a slot for inserting and rotating the shaft of the magnetic steel 31. The base 13 is integrally formed with a support block 10, and the support block 10 is provided with an insertion hole 101. The bottom wall of the clamping plate 33 is integrally formed with an insertion block 332, which is inserted into the insertion hole 101 to fix the clamping plate 33. The center of the clamping plate 33 is provided with a rotating hole 331 for inserting and rotating the shaft of the magnetic steel 31, so that the magnetic steel 31 can rotate around its own shaft. The transmission member 32 is fixed to the side wall of the magnetic steel 31 away from the wire frame 21, and the transmission member 32 is used to drive the pusher 4.

[0044] Referring to Figure 2 and Figure 3 , pusher 4 includes push rod 41, magnetic steel transmission block 42 and dynamic spring transmission block 43. The inner wall of the base 13 is integrally formed with a guide plate 7 and a guide block 8, and the push rod 41 is slidingly installed between the guide block 8 and the guide plate 7. The magnetic steel transmission block 42 is integrally formed on one end of the push rod 41 close to the magnetic steel 31, and the magnetic steel transmission block 42 is provided with a magnetic steel transmission groove 421 for the end of the transmission member 32 to extend into; the dynamic spring transmission block 43 is integrally formed on the other end of the push rod 41 away from the magnetic steel 31, and the side wall of the dynamic spring transmission block 43 close to the conductive pin 52 is provided with a dynamic spring transmission groove 431 for driving cooperation with the dynamic spring assembly 5.

[0045] Referring to Figure 2 and Figure 3 , dynamic spring assembly 5 includes dynamic spring pin 51, conductive pin 52 and dynamic contact 53. The upper end face of the guide block 8 is provided with an insertion slot 81, and the side wall of the dynamic spring pin 51 is integrally formed with an insertion block 9 which is inserted into the insertion slot 81. The dynamic spring pin 51 is provided with an avoidance slot 511 which penetrates through itself, and the avoidance slot 511 is used for the push rod 41 to pass through to avoid the push rod 41.

[0046] Referring to Figure 2 and Figure 3, the conductive pin 52 is fixed on the moving spring pin 51, the conductive pin 52 is provided with two, the two conductive pins 52 are arranged at intervals. One end of the two conductive pins 52 is fixed together through a conductive part to realize electrical connection, in the embodiment of the application, the conductive part is formed by slotting a copper sheet, and the two conductive pins 52 are connected to the conductive part, the other end of the two conductive pins 52 is a movable end, the moving contact 53 is provided with two, the two moving contacts 53 are fixed on different conductive pins 52 respectively. The end of the conductive pin 52 close to the end of the push rod 41 is provided with a transmission piece 54 fixed with the conductive pin 52, the movable end of the conductive pin 52 and the end of the transmission piece 54 are located in the moving spring transmission groove 431 and abut against the two opposite groove walls of the moving spring transmission groove 431. The transmission piece 54 is arranged obliquely, the distance between the transmission piece 54 and the static contact 62 gradually increases along the arrangement direction of the moving contact 53 and the moving spring transmission groove 431.

[0047] With reference to Figure 2 , the static spring assembly 6 includes a static spring pin 61 and a static contact 62, the side wall of the static spring pin 61 is integrally formed with a plug-in block 9 having the same structure size as that on the moving spring pin 51, the plug-in block 9 on the static spring pin 61 is arranged opposite to the plug-in block 9 on the moving spring pin 51. The plug-in groove 81 corresponds to the number of the plug-in block 9 and is arranged correspondingly, the plug-in block 9 and the plug-in groove 81 are plug-in matched. The static contact 62 is provided with two, the static contact 62 is fixed on the static spring pin 61, and the static contact 62 corresponds to the moving contact 53 one by one.

[0048] With reference to Figure 4 And Figure 5 , the housing 1 is provided with an arc extinguishing grid 11, the arc extinguishing grid 11 includes a grid strip 122 protruding on the inner wall of the upper cover 12 and a grid groove 133 opened on the inner wall of the base 13, the moving contact 53 and the static contact 62 are arranged between the grid strip 122 and the grid groove 133, and the grid strip 122 and the grid groove 133 are used for arc extinguishing.

[0049] The implementation principle of the magnetic latching relay in the embodiment 1 is as follows: when the relay coil is supplied with a forward pulse voltage, the magnetic steel 31 rotates, the transmission member 32 pushes the push member 4 to move close to the static spring pin 61, the push member 4 pushes the transmission piece 54 to move close to the static spring pin 61, the moving contact 53 contacts the static contact 62, and the relay is in an on state; when the relay coil is supplied with a reverse pulse voltage, the magnetic steel 31 rotates, the transmission member 32 pushes the push member 4 to move away from the static spring pin 61, the push member 4 pushes the conductive pin 52 to move away from the static spring pin 61, the moving contact 53 is separated from the static contact 62, and the relay is in an off state.

[0050] Embodiment 2:

[0051] With reference to Figure 6 And Figure 7Different from the embodiment 1, in this embodiment, the transmission piece 54 comprises a piece body 542 and a contact ball 55 arranged on the piece body 542, the piece body 542 is provided with a containing groove 541 punched and formed on the side wall of the piece body 542, the contact ball 55 is fixed in the containing groove 541 through a welding process, and the contact ball 55 is in contact with the groove wall of the dynamic spring transmission groove 431. The piece body 542 is arranged in a curved manner, the convex arc surface of the piece body 542 faces the groove wall of the dynamic spring transmission groove 431 in contact with the contact ball 55, so that the movable end of the piece body 542 avoids the dynamic spring transmission groove 431 and does not interfere with the dynamic spring transmission groove 431.

[0052] The implementation principle of the magnetic latching relay in the embodiment 2 of the application is as follows: in the process that the pushing piece 4 is close to the static contact 62, the groove wall of the dynamic spring transmission groove 431 pushes the piece body 542, so that the piece body 542 swings relative to the dynamic spring transmission groove 431, the groove wall of the dynamic spring transmission groove 431 and the contact ball 55 on the piece body 542 always keep point contact, and the sliding friction between the piece body 542 and the dynamic spring transmission groove 431 is reduced. In addition, the piece body 542 is arranged in a curved manner, so that the movable end of the piece body 542 avoids the groove wall of the dynamic spring transmission groove 431, the movable end of the piece body 542 does not interfere with the groove wall of the dynamic spring transmission groove 431, and there is no friction force between the movable end of the piece body 542 and the groove wall of the dynamic spring transmission groove 431.

[0053] The above are the preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A magnetic latching relay characterized by: The shell (1) is internally provided with a moving spring assembly (5) and a static spring assembly (6), the moving spring assembly (5) comprises a moving spring pin (51), a plurality of moving contacts (53) and a plurality of conductive pins (52) arranged on the moving spring pin (51), each of the conductive pins (52) is arranged at intervals, and the moving contacts (53) are arranged on each of the conductive pins (52), the static spring assembly (6) comprises a static spring pin (61) and a plurality of static contacts (62) arranged on the static spring pin (61), and the static contacts (62) and the moving contacts (53) are arranged correspondingly.

2. The magnetic latching relay of claim 1, wherein: An arc extinguishing grid (11) is arranged on the inner wall of the shell (1), and the arc extinguishing grid (11) is arranged correspondingly to the static contacts (62) and the moving contacts (53).

3. The magnetic latching relay of claim 1, wherein: The shell (1) comprises an upper cover (12) and a base (13), and the upper cover (12) and the base (13) are snap-connected.

4. The magnetic latching relay of claim 1, wherein: A pushing member (4) is further arranged in the shell (1), the pushing member (4) is used for driving the conductive pins (52) to swing, an avoiding groove (511) is arranged on the moving spring pin (51), and the avoiding groove (511) is used for allowing the pushing member (4) to pass through.

5. The magnetic latching relay of claim 4, wherein: A guide plate (7) and a guide block (8) are arranged in the shell (1), and the pushing member (4) is slidingly arranged between the guide block (8) and the guide plate (7).

6. The magnetic latching relay of claim 4, wherein: A armature assembly (3) is further arranged, the armature assembly (3) comprises a magnetic steel (31) which is rotatably arranged in the shell (1), a transmission member (32) is arranged on the magnetic steel (31), the pushing member (4) comprises a pushing rod (41) and a magnetic steel transmission block (42) arranged on the pushing rod (41), a magnetic steel transmission groove (421) is arranged on the magnetic steel transmission block (42), and the magnetic steel transmission groove (421) is used for allowing an end portion of the transmission member (32) to extend into.

7. The magnetic latching relay of claim 5, wherein: The pushing member (4) comprises a pushing rod (41) and a moving spring transmission block (43) arranged on the pushing rod (41), a moving spring transmission groove (431) is arranged on a side surface of the moving spring transmission block (43) which is close to the conductive pin (52), a transmission piece (54) is arranged on the conductive pin (52), and end portions of the conductive pin (52) and the transmission piece (54) are located in the moving spring transmission groove (431) and abut against two opposite groove walls of the moving spring transmission groove (431) respectively.

8. The magnetic latching relay of claim 7, wherein: The transmission piece (54) comprises a piece body (542) and a contact ball (55) arranged on the piece body (542), and the contact ball (55) abuts against the groove wall of the moving spring transmission groove (431).

9. The magnetic latching relay of claim 8, wherein: The piece body (542) is arranged in a curved manner, and a convex arc surface of the piece body (542) abuts against the groove wall of the moving spring transmission groove (431) and the contact ball (55).

10. The magnetic latching relay of claim 9, wherein: An accommodating groove (541) is arranged on the piece body (542), and the contact ball (55) is arranged in the accommodating groove.

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