Magnetic latching relay

Abstract

The utility model relates to the technical field of relays, and discloses a magnetic latching relay which comprises a shell, the shell is provided with a contact structure and a driving structure, the contact structure comprises a movable contact piece and a static contact piece, the driving structure comprises a magnet yoke assembly and a coil assembly, the shell is provided with a magnetic blow-out structure, and the magnetic blow-out structure comprises a first magnet and a second magnet. The first magnet is arranged on one side of the shell, the second magnet is arranged on the other side of the shell, the magnetism of the first magnet towards the second magnet is the same as the magnetism of the second magnet towards the first magnet, and the shell cannot be punctured by shunted current. The magnetism of the first magnet towards the second magnet is the same as that of the second magnet, the different magnetisms of the magnets can guide the electric arc to move towards different directions, the generated electric arc is shunted, the energy of the shunted electric arc is reduced, the shunted electric arc cannot break down, and damage of the electric arc to the magnetic latching relay is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of relays, and in particular to a magnetic latching relay. Background Art

[0002] A magnetic latching relay is a switch used to open and close a circuit. A magnetic latching relay uses a permanent magnet to maintain the normally closed or normally open state of the circuit. Magnetic latching relays are widely used in situations where the switch state or control state needs to be maintained for a long time. Magnetic latching relays need to be set in some special positions, so the space occupied by magnetic latching relays is fixed.

[0003] Reference Figure 1 In the related art, a magnetic holding relay includes a housing 1, in which a contact structure 2 and a driving structure 3 are arranged. The contact structure 2 includes a moving contact piece 21 and a stationary contact piece 22. The moving contact piece 21 is provided with a moving contact 211, and the stationary contact piece 22 is provided with a stationary contact 221. The moving contact piece 21 and the stationary contact piece 22 are both arranged in the housing 1. A moving contact hole 17 and a stationary contact hole 171 are opened on the surface of the housing 1. The moving contact hole 17 is for the moving contact piece 21 to pass through, and the stationary contact hole 171 is for the stationary contact piece 22 to pass through. The driving structure 3 is used to drive the moving contact 211 to abut against the stationary contact 221 to achieve circuit connection or drive the moving contact 211 away from the stationary contact 221 to achieve circuit disconnection.

[0004] When the moving contact piece is connected to the positive pole and the stationary contact piece is connected to the negative pole, and the moving contact and the stationary contact are separated, the arc generated between the moving contact piece and the stationary contact piece moves in the direction away from the moving contact hole opened in the shell. The creepage distance of the moving contact piece or the stationary contact piece is long enough. At this time, the arc gradually weakens during the movement along the moving contact piece or the stationary contact piece, so that the arc will not damage the shell.

[0005] If the moving contact is connected to the negative pole and the stationary contact is connected to the positive pole, and the moving contact and the stationary contact are separated, the arc moves toward the moving contact hole opened in the shell. Due to the limited overall space of the magnetic latching relay and the insufficient creepage distance of the moving contact or the stationary contact, the arc will damage the shell or even penetrate the shell, thereby affecting the normal use of the magnetic latching relay. Utility Model Content

[0006] In order to improve the problem of connecting a moving contact piece to a negative pole and a stationary contact piece to a positive pole, which affects a magnetic latching relay, the present application provides a magnetic latching relay.

[0007] The present application provides a magnetic latching relay, which adopts the following technical solution:

[0008] A magnetic holding relay comprises a shell, on which a contact structure and a driving structure are provided, the contact structure comprises a moving contact piece and a stationary contact piece, the moving contact piece is provided with a moving contact point, the stationary contact piece is provided with a stationary contact point, the driving structure comprises a yoke assembly and a coil assembly, the yoke assembly is used to drive the moving contact piece to move, and the coil assembly is used to drive the yoke assembly to move, the shell is provided with a magnetic blowing structure, the magnetic blowing structure comprises a first magnet and a second magnet, the first magnet is arranged on one side of the shell, and the second magnet is arranged on the other side of the shell, the magnetism of the first magnet toward the second magnet is the same as the magnetism of the second magnet toward the first magnet, and the shunted current will not break through the shell.

[0009] By adopting the above technical solution, an arc can be generated when the moving contact piece and the static contact piece are separated, and the magnet can guide the arc. Since the first magnet is arranged on one side of the shell, and the second magnet is arranged on the other side of the shell, and the magnetism of the first magnet toward the second magnet is the same as the magnetism of the second magnet, the different magnetism of the magnets can guide the arc to move in different directions, so that the arc close to the first magnet can move to one side, and the arc close to the second magnet can move to the other side, so that the generated arc is shunted, and the energy of the arc after shunting is reduced. Since the current after shunting will not break down the subject, the damage to the magnetic latching relay caused by the arc is avoided; at the same time, after the arc is shunted, the arc is not easy to damage the shell, and people do not need to pay attention to whether the moving contact piece is connected to the positive pole or the negative pole, so as to avoid the magnetic latching relay malfunctioning due to the wrong circuit connection direction.

[0010] Optionally, a magnetic plate is provided on the shell, a receiving groove is formed on the magnetic plate for placing the first magnet, a mounting block is provided on the magnetic plate, and a mounting groove is formed on the shell for inserting the mounting block. When the mounting block is inserted into the mounting groove, the magnetic plate is fixed to the shell.

[0011] By adopting the above technical solution, the mounting block is inserted into the mounting groove, so that the magnetic attraction plate can be stably located on the shell. Since the first magnet is located in the accommodating groove, the first magnet is not easy to move on the shell, so that the first magnet can be stably located in the shell.

[0012] Optionally, a stopping groove is provided on the moving contact piece, and a stopping block for inserting into the stopping groove is provided on the magnetic attraction plate. When the stopping block is inserted into the stopping groove, the mounting block is inserted into the mounting groove.

[0013] By adopting the above technical solution, the stop block is inserted into the stop groove, and the groove wall of the stop groove restricts the stop block. In addition, the mounting block is inserted into the mounting groove, and the groove wall of the mounting groove restricts the mounting block, so that the magnetic attraction plate can be stably located in the shell, further enhancing the stability of the first magnet in the shell.

[0014] Optionally, the coil assembly includes an iron core and two support plates, the iron core is arranged between the two support plates, and the iron core is in the shape of a right prism.

[0015] By adopting the above technical solution, the iron core is set between two support plates, so that the coil can be wound on the iron core. Under the same conditions, since the iron core is a right prism, the coil mounted on the right prism-shaped iron core reduces the winding volume of the coil wound on the iron core compared to the coil mounted on the cylindrical iron core, so that more coils can be wound in the same space to increase the magnetic field generated by the coil.

[0016] Optionally, a guide bar is provided on the iron core, and a guide groove for inserting the guide bar is opened on the shell. When the guide bar is inserted into the guide groove, the support plate is mounted on the shell.

[0017] By adopting the above technical solution, the guide bar is inserted into the guide groove, and the groove wall of the guide groove restricts the guide bar, so that the support plate will not deviate during the installation process, and the support plate can be smoothly installed in the shell.

[0018] Optionally, the yoke assembly includes an armature block, an auxiliary movable plate and an auxiliary static plate, the armature block is rotatably connected to the shell, the armature block is provided with a first armature bar and a second armature bar, the auxiliary movable plate and the auxiliary static plate are both arranged on the shell, the first armature bar drives the auxiliary movable plate to move toward the auxiliary static plate, the second armature bar drives the auxiliary movable plate to move away from the auxiliary static plate, and the first armature bar has a chamfer on its surface facing the second armature bar.

[0019] By adopting the above technical solution, since the armature block is rotatably connected to the shell, when the armature block rotates, the first armature bar drives the auxiliary movable plate to move toward the auxiliary static plate, and the first armature bar abuts the auxiliary movable plate to move, causing the auxiliary movable plate to deform until the auxiliary movable plate abuts the auxiliary static plate. Since the first armature bar has a chamfer on the surface facing the second armature bar, the first armature bar reduces damage to the auxiliary movable plate when abutting against the auxiliary movable plate, thereby avoiding damage to the auxiliary movable plate due to the drive of the first armature block and extending the service life of the auxiliary movable plate.

[0020] Optionally, the second armature bar has a chamfer on a surface facing the first armature bar.

[0021] By adopting the above technical solution, when the second armature bar moves toward the direction of the first armature bar, the second armature bar abuts the auxiliary movable plate and moves in the direction away from the auxiliary static plate. Since the second armature bar has a chamfer on the surface facing the first armature bar, the second armature bar reduces damage to the auxiliary movable plate when abutting against the auxiliary movable plate, thereby avoiding damage to the auxiliary movable plate due to the drive of the second armature block, and further extending the service life of the auxiliary movable plate.

[0022] Optionally, the armature block is provided with reinforcing ribs, and the reinforcing ribs are arranged on the first armature bar.

[0023] By adopting the above technical solution, reinforcing ribs are set on the first armature bar, so that the first armature bar and the armature block can be more secure, avoiding damage to the first armature bar due to long-term force, and extending the service life of the first armature bar.

[0024] Optionally, a placement groove for placing the contact structure and the drive structure is provided on the shell, and a heat dissipation hole connected to the placement groove is provided on the shell.

[0025] By adopting the above technical solution, the placement groove is connected through the heat dissipation hole, so that the gas in the placement groove can flow to the outside of the shell through the heat dissipation hole, reducing the overheating of the shell, and allowing the contact structure and drive structure in the shell to operate stably.

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

[0027] 1. When the moving contact piece and the stationary contact piece are separated, an arc can be generated, and the magnet can guide the arc. Since the first magnet is arranged on one side of the shell, and the second magnet is arranged on the other side of the shell, and the magnetism of the first magnet toward the second magnet is the same as the magnetism of the second magnet, the different magnetism of the magnets can guide the arc to move in different directions, so that the arc close to the first magnet can move to one side, and the arc close to the second magnet can move to the other side, so that the generated arc is shunted, and the energy of the arc after shunting is reduced. Since the current after shunting will not break down the subject, the damage to the magnetic latching relay caused by the arc is avoided; at the same time, after the arc is shunted, the arc is not easy to damage the shell, and people do not need to pay attention to whether the moving contact piece is connected to the positive pole or the negative pole, so as to avoid the magnetic latching relay from malfunctioning due to the wrong circuit connection direction.

[0028] 2. When other structures are the same, since the iron core is in the shape of a right prism, the coil mounted on the right prism-shaped iron core reduces the winding volume of the coil wound on the iron core compared to the coil mounted on the cylindrical iron core, so that more coils can be wound in the same space to increase the magnetic field generated by the coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the background technology;

[0030] Figure 2 It is a schematic diagram of the structure of an embodiment of the present application;

[0031] Figure 3 is an exploded schematic diagram highlighting the coil assembly in an embodiment of the present application;

[0032] Figure 4 is an exploded schematic diagram highlighting the rotating block in an embodiment of the present application;

[0033] Figure 5 is a structural schematic diagram highlighting the yoke assembly in an embodiment of the present application;

[0034] Figure 6 is a structural schematic diagram highlighting the magnetic blowing assembly in an embodiment of the present application;

[0035] Figure 7 It is an exploded schematic diagram highlighting the magnetic suction plate in the embodiment of the present application.

[0036] Figure numerals: 1, housing; 11, placement slot; 12, heat dissipation hole; 13, guide slot; 14, rotating block; 141, rotating slot; 15, moving plate slot; 16, static plate slot; 161, card slot; 17, moving contact hole; 171, static contact hole; 18, magnetic suction slot; 19, installation slot; 2, contact structure; 21, moving contact piece; 211, moving contact point; 22, static contact piece; 221, static contact; 23, stop slot; 3, driving structure; 31, yoke assembly; 311, armature block; 312, auxiliary moving Plate; 313, auxiliary static plate; 314, mounting plate; 315, mounting hole; 316, mounting rod; 32, rotating rod; 33, first armature bar; 331, second armature bar; 34, clamping block; 35, reinforcing rib; 4, coil assembly; 41, coil; 42, iron core; 421, guide bar; 43, support plate; 431, guide hole; 5, magnetic blowing structure; 51, first magnet; 52, second magnet; 53, magnetic attraction plate; 531, receiving groove; 532, mounting block; 533, stop block. DETAILED DESCRIPTION

[0037] The following is combined with Figure 2-7 This application is described in further detail.

[0038] This embodiment discloses a magnetic latching relay. Figure 2 A magnetic latching relay includes a housing 1, on which a contact structure 2 and a drive structure 3 are arranged. The housing 1 is provided with a placement slot 11 for placing the contact structure 2 and the drive structure 3, and the housing 1 is provided with a heat dissipation hole 12 connected to the placement slot 11. The drive structure 3 is used to drive the contact structure 2 to move, so that the contact structure 2 can connect or disconnect the circuit.

[0039] Reference Figure 2 and Figure 3The driving structure 3 includes a yoke assembly 31 and a coil assembly 4. The coil assembly 4 is used to drive the yoke assembly 31 to move, and the yoke assembly 31 can drive the contact structure 2 to move. The coil assembly 4 includes a coil 41, an iron core 42 and two support plates 43. A guide bar 421 is integrally formed on the iron core 42, and a guide hole 431 is provided on the support plate 43 for the guide bar 421 to pass through. When the guide bar 421 passes through the guide hole 431, the iron core 42 is located between the two support plates 43. The iron core 42 is in the shape of a quadrangular prism, and the coil 41 is sleeved on the outer surface of the iron core 42.

[0040] Reference Figure 3 and Figure 4 The groove wall of the placement groove 11 is provided with a guide groove 13 for inserting the guide bar 421. Two guide grooves 13 are provided, and the guide grooves 13 penetrate the surface of the housing 1 where the placement groove 11 is provided. When the guide bar 421 is inserted into the guide groove 13, the support plate 43 abuts against the groove wall of the placement groove 11.

[0041] Reference Figure 4 and Figure 5 The yoke assembly 31 includes an armature block 311, an auxiliary moving piece 312 and an auxiliary static piece 313. The housing 1 is integrally formed with a rotating block 14, and the rotating block 14 is provided with a rotating groove 141. The armature block 311 is integrally formed with a rotating rod 32 for inserting into the rotating groove 141. When the rotating rod 32 is inserted into the rotating groove 141, the armature block 311 can rotate in the placement groove 11.

[0042] Reference Figure 4 A mounting plate 314 is provided on the surface of the armature block 311, and a mounting hole 315 is provided on the surface of the mounting plate 314. A mounting rod 316 is integrally formed on the surface of the armature block 311, and the mounting rod 316 is used to be inserted into the mounting hole 315. When the mounting rod 316 is inserted into the mounting hole 315, the mounting plate 314 is fixed to the armature block 311, so that the armature block 311 can rotate smoothly in the housing 1.

[0043] Reference Figure 5 and Figure 6 The housing 1 is provided with a movable plate groove 15 and a static plate groove 16 connected to the placement groove 11, the auxiliary movable plate 312 is arranged in the movable plate groove 15, the auxiliary static plate 313 is arranged in the static plate groove 16, and the auxiliary movable plate 312 is elastic. The armature block 311 is integrally formed with a first armature bar 33 and a second armature bar 331, and one end of the auxiliary movable plate 312 is located between the first armature bar 33 and the second armature bar 331. A clamping groove 161 is provided on the groove wall of the static plate groove 16, and the clamping groove 161 penetrates to the surface of the housing 1 where the static plate groove 16 is provided. A clamping block 34 is fixedly connected to the auxiliary static plate 313, and the clamping block 34 can be inserted into the clamping groove 161. When the clamping block 34 is inserted into the clamping groove 161, the auxiliary static plate 313 is fixed to the housing 1.

[0044] Reference Figure 5 When the armature block 311 rotates, the first armature bar 33 drives the auxiliary movable plate 312 to move toward the auxiliary static plate 313 until the auxiliary movable plate 312 abuts against the auxiliary static plate 313; or the second armature bar 331 drives the auxiliary movable plate 312 to move toward the auxiliary static plate 313 until the auxiliary movable plate 312 is separated from the auxiliary static plate 313.

[0045] Reference Figure 5 The first armature bar 33 has a chamfer on its surface facing the second armature bar 331, and the second armature bar 331 has a chamfer on its surface facing the first armature bar 33, so as to reduce the damage to the auxiliary movable plate when the first armature bar 33 and the second armature bar 331 drive the auxiliary movable plate 312 to move. A plurality of reinforcing ribs 35 are integrally formed on the armature block 311, and the reinforcing ribs 35 are arranged on the first armature bar 33 and the second armature bar 331, and the reinforcing ribs 35 are also arranged between the first armature bar 33 and the second armature bar 331.

[0046] Reference Figure 2 and Figure 5 When the coil 41 is energized, the coil 41 generates a magnetic field, causing the armature block 311 to rotate, allowing the armature block 311 to drive the contact structure 2 to move, thereby disconnecting or connecting the circuit.

[0047] Reference Figure 7 The contact structure 2 includes a moving contact piece 21 and a stationary contact piece 22. The moving contact piece 21 is fixedly connected with a moving contact 211, and the stationary contact piece 22 is fixedly connected with a stationary contact 221. The housing 1 is provided with a moving contact hole 17 and a stationary contact hole 171 connected to the placement slot 11. One end of the moving contact piece 21 extends out of the housing 1 through the moving contact hole 17, and one end of the stationary contact piece 22 extends out of the housing 1 through the stationary contact hole 171. When the moving contact 211 abuts against the stationary contact 221, the two circuits are connected to each other. When the moving contact 211 is separated from the stationary contact 221, the two circuits are disconnected.

[0048] Reference Figure 6 and Figure 7 The housing 1 is provided with a magnetic blowing structure 5, which includes a first magnet 51 and a second magnet 52. A magnetic suction groove 18 is provided on the surface of the housing 1 away from the placement groove 11, and the second magnet 52 is arranged in the magnetic suction groove 18. The housing 1 is provided with a magnetic suction plate 53, and a receiving groove 531 is provided on the surface of the magnetic suction plate 53, and the first magnet 51 is arranged in the receiving groove 531.

[0049] Reference Figure 6 and Figure 7The magnetic plate 53 is integrally formed with a mounting block 532 and a stop block 533, and the mounting block 532 and the stop block 533 are respectively located on both sides of the magnetic plate 53. The housing 1 is provided with a mounting groove 19 for inserting the mounting block 532, and the surface of the movable contact piece 21 is provided with a stop groove 23 for inserting the stop block 533. When the stop block 533 is inserted into the stop groove 23, the mounting block 532 is located in the mounting groove 19, and the magnetic plate 53 is installed in the placement groove 11.

[0050] Reference Figure 6 and Figure 7 , the side of the first magnet 51 facing the second magnet 52 is the south pole, and the side of the second magnet 52 facing the first magnet 51 is the south pole. In other embodiments, the side of the first magnet 51 facing the second magnet 52 is the north pole, and the side of the second magnet 52 facing the first magnet 51 is the north pole. The magnetic properties of the first magnet 51 and the second magnet 52 separate the arc generated when the moving contact 211 and the static contact 221 are separated, so that the arc close to the first magnet 51 moves to one side, and the arc close to the second magnet 52 moves to the other side, so as to avoid damage to the housing 1 caused by excessive arc.

[0051] The implementation principle of a magnetic latching relay in an embodiment of the present application is as follows: when the moving contact piece 21 is connected to the positive pole and the stationary contact piece 22 is connected to the negative pole, the arc generated by the separation of the moving contact 211 and the stationary contact 221 is separated by the force of the first magnet 51 and the second magnet 52, and one of the arcs moves toward one side of the shell 1, and the other arc moves toward the other side of the shell 1, thereby reducing the energy in the arc and avoiding damage to the shell 1 caused by excessive arc.

[0052] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0053] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present application should be included in the protection scope of the present application.

Claims

1. A magnetic latching relay, comprising a housing (1), wherein the housing (1) is provided with a contact structure (2) and a drive structure (3), wherein the contact structure (2) comprises a moving contact piece (21) and a stationary contact piece (22), wherein the moving contact piece (21) is provided with a moving contact point (211), and the stationary contact piece (22) is provided with a stationary contact point (221), wherein the drive structure (3) comprises a yoke assembly (31) and a coil assembly (4), wherein the yoke assembly (31) is used to drive the moving contact piece (21) to move, and wherein the coil assembly (4) is used to drive the yoke assembly (31) to move, wherein: The shell (1) is provided with a magnetic blowing structure (5), the magnetic blowing structure (5) comprising a first magnet (51) and a second magnet (52), the first magnet (51) being arranged on one side of the shell (1), the second magnet (52) being arranged on the other side of the shell (1), the magnetic properties of the first magnet (51) towards the second magnet (52) being the same as the magnetic properties of the second magnet (52) towards the first magnet (51), and the shunted current will not break through the shell (1).

2. A magnetic latching relay according to claim 1, characterized in that: The shell (1) is provided with a magnetic attraction plate (53), the magnetic attraction plate (53) is provided with a receiving groove (531) for placing the first magnet (51), the magnetic attraction plate (53) is provided with a mounting block (532), the shell (1) is provided with a mounting groove (19) for inserting the mounting block (532), and when the mounting block (532) is inserted into the mounting groove (19), the magnetic attraction plate (53) is fixed on the shell (1).

3. A magnetic latching relay according to claim 2, characterized in that: The movable contact piece (21) is provided with a stop groove (23), and the magnetic attraction plate (53) is provided with a stop block (533) for inserting into the stop groove (23). When the stop block (533) is inserted into the stop groove (23), the mounting block (532) is inserted into the mounting groove (19).

4. A magnetic latching relay according to claim 1, characterized in that: The coil assembly (4) comprises an iron core (42) and two support plates (43); the iron core (42) is arranged between the two support plates (43); and the iron core (42) is in the shape of a right prism.

5. A magnetic latching relay according to claim 4, characterized in that: The iron core (42) is provided with a guide bar (421), and the shell (1) is provided with a guide groove (13) for inserting the guide bar (421). When the guide bar (421) is inserted into the guide groove (13), the support plate (43) is mounted on the shell (1).

6. A magnetic latching relay according to claim 1, characterized in that: The yoke assembly (31) comprises an armature block (311), an auxiliary movable plate (312) and an auxiliary static plate (313); the armature block (311) is rotatably connected to the housing (1); a first armature bar (33) and a second armature bar (331) are provided on the armature block (311); the auxiliary movable plate (312) and the auxiliary static plate (313) are both arranged on the housing (1); the first armature bar (33) drives the auxiliary movable plate (312) to move in the direction of the auxiliary static plate (313); the second armature bar (331) drives the auxiliary movable plate (312) to move in a direction away from the auxiliary static plate (313); and the first armature bar (33) has a chamfer on its surface facing the second armature bar (331).

7. A magnetic latching relay according to claim 6, characterized in that: The second armature bar (331) has a chamfer on a surface facing the first armature bar (33).

8. A magnetic latching relay according to claim 6, characterized in that: The armature block (311) is provided with a reinforcing rib (35), and the reinforcing rib (35) is arranged on the first armature bar (33).

9. A magnetic latching relay according to claim 1, characterized in that: The housing (1) is provided with a placement groove (11) for placing the contact structure (2) and the drive structure (3), and the housing (1) is provided with a heat dissipation hole (12) connected to the placement groove (11).

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