Circuit breaker based on pancake-shaped magnets

Abstract

The present application discloses a circuit breaker with a magnetic reset mechanism, including a housing, a lock, and a handle, wherein the handle is rotatably mounted on the housing, and one end of the handle is located outside the housing, the lock is rotatably arranged inside the housing, the lock and the handle are connected by a connecting rod, and further comprising a first magnet block and a second magnet block, wherein the first magnet block is arranged on the shell wall of the housing, and the second magnet block is arranged on the lock. The present invention has the following beneficial effects: the magnet block is used to drive the lock to rotate back to its original position after being rotated by magnetic attraction, the magnet blocks will not be entangled with each other, the structure is simpler, and it can be disassembled and assembled, and has high reliability.

Description

[0001] This application is a divisional application with application date of December 22, 2021, application number 2021115837610, and invention name “Circuit breaker with magnetic reset mechanism”. Technical Field

[0002] The invention relates to the field of electrical equipment, and in particular to a circuit breaker based on a disc-shaped magnet block. Background Art

[0003] Circuit breakers are widely used in the fields of lighting, equipment and other power distribution. Patent announcement document CN206864411U provides a circuit breaker in which the lock needs to be pulled back by a spring to reset after it is rotated into place. Since the springs are small in size and entangled with each other, they cannot be mechanically disassembled and assembled, which hinders the realization of automated assembly. Summary of the invention

[0004] In view of the above problems, the present invention provides a circuit breaker with a magnetic reset mechanism.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A circuit breaker with a magnetic reset mechanism comprises a shell, a lock and a handle, wherein the handle is rotatably mounted on the shell, and one end of the handle is located outside the shell, the lock is rotatably arranged inside the shell, the lock and the handle are connected by a connecting rod, and further comprises a first magnet block and a second magnet block, wherein the first magnet block is arranged on the shell wall, and the second magnet block is arranged on the lock.

[0007] In the circuit breaker of the present invention, by setting the first magnet block and the second magnet block on the housing and the lock, the first magnet block and the second magnet block can attract each other, so that when the handle rotates and the lock is rotated, the mutual attraction of the first magnet block and the second magnet block can drive the lock to rotate back to the position before the rotation. Therefore, the circuit breaker uses a magnet block to drive the lock to rotate back to the original position after rotation by magnetic attraction. The magnet blocks will not be entangled with each other, the structure is simpler, and it can be mechanically automatically disassembled and assembled with high reliability. It can realize the full process of fully automated assembly of small circuit breakers.

[0008] Optionally, it also includes a moving contact, which is rotatably arranged in the housing, and a slide groove is arranged on the moving contact, and the slide groove is used to cooperate with the connecting rod.

[0009] When the handle is turned, the lock first rotates through the action of the connecting rod, thereby further driving the moving contact to rotate. The connecting rod is provided with a cylindrical foot, which is located in the sliding groove of the moving contact. When the handle is turned, the lock restricts the cylindrical foot of the connecting rod and the moving contact in the sliding groove of the moving contact. When the handle is turned, the lock drives the lock and the moving contact to rotate together, and the circuit breaker completes a closing.

[0010] Optionally, a tension spring is further included, one end of the tension spring is matched with the housing, and the other end of the tension spring is matched with the moving contact.

[0011] The function of the tension spring is to provide pressure to the contact when the moving contact is closed and to provide a reset force when it is opened.

[0012] Optionally, a third magnet block is arranged on the moving contact, and the third magnet block and the first magnet block are respectively located on both sides of the second magnet block.

[0013] The first magnet block and the third magnet block are respectively arranged on both sides of the second magnet block. This design is to attract the lock buckle from both sides, so that when the lock buckle returns to its original position after rotation, there is pulling force on both sides, which can reduce the probability of deflection of the lock buckle during rotation.

[0014] Specifically, the first magnet block, the second magnet block and the third magnet block are all pancake-shaped magnet blocks. Magnet blocks with this structure are easy to install on the housing, the lock and the moving contact.

[0015] Optionally, it also includes a terminal, which is arranged in the shell, and there are two terminals.

[0016] The function of the terminal is to connect wires.

[0017] Optionally, an arc extinguishing chamber is also included, and the arc extinguishing chamber is arranged in the shell.

[0018] Optionally, it also includes an electromagnetic component, which is arranged in the shell and connected to the terminal.

[0019] Because the electromagnetic component is connected to the terminal, when the short-circuit fault current in the line reaches the tripping value, the moving iron core in the electromagnetic component pushes the push rod, the push rod pushes the lock to unlock, the connecting rod slides out of the moving contact slot, and the product is disconnected.

[0020] Optionally, a cylindrical foot is provided on the connecting rod, and the connecting rod cooperates with the handle and the lock through its own cylindrical foot.

[0021] Optionally, a rotating column is provided in the shell, and the lock is rotatably provided on the rotating column.

[0022] Specifically, the lock catch and the moving contact are both mounted on the same rotating column, so that the rotation centers of the lock catch and the rotating column are at the same point, which can improve the stability of the lock catch and the moving contact during rotation.

[0023] Optionally, the shell includes a shell bottom and a shell cover, and the shell cover and the shell bottom are detachably matched together.

[0024] The beneficial effects of the present invention are: the magnet block is used to drive the rotated lock to rotate back to the original position by magnetic attraction, the magnet blocks will not be entangled with each other, the structure is simpler, it can be disassembled and assembled, the reliability is strong, and machine automated assembly can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of a circuit breaker with a magnetic reset mechanism.

[0026] Figure 2 It is a schematic diagram of the coordination relationship between the moving contact and the static contact.

[0027] Figure 3 It is a schematic diagram of the positional relationship among the first magnet block, the second magnet block and the third magnet block.

[0028] The reference numerals in the figure are: 1. terminal; 2. electromagnetic assembly; 201. static iron core; 202. reset spring; 203. moving iron core; 3. arc extinguishing chamber; 4. static contact; 5. moving contact; 6. arc extinguishing piece; 7. double gold; 8. release; 9. lock; 10. connecting rod; 1001. cylindrical foot; 11. handle; 12. tension spring; 1301. first magnet block; 1302. second magnet block; 1303. third magnet block; 14. outer shell. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with the accompanying drawings.

[0030] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, a circuit breaker with a magnetic reset mechanism includes a shell 14, a lock 9 and a handle 11. The handle 11 is rotatably mounted on the shell 14, and one end of the handle 11 is located outside the shell 14. The lock 9 is rotatably set in the shell 14. The lock 9 and the handle 11 are connected by a connecting rod 10. It also includes a first magnet block 1301 and a second magnet block 1302. The first magnet block 1301 is set on the shell wall of the shell 14, and the second magnet block 1302 is set on the lock 9.

[0031] In the circuit breaker of the present invention, by arranging the first magnet block 1301 and the second magnet block 1302 on the housing 14 and the lock buckle 9, the first magnet block 1301 and the second magnet block 1302 can attract each other, so that when the handle 11 rotates and the lock buckle 9 rotates, the mutual attraction between the first magnet block 1301 and the second magnet block 1302 can rotate the lock buckle 9 to the position before the rotation begins. Therefore, the circuit breaker adopts the magnet block to drive the lock buckle 9 to rotate to the original position after the rotation by magnetic attraction, and the structure is simpler and the reliability is strong.

[0032] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, the movable contact 5 is also included. The movable contact 5 is rotatably arranged in the housing 14 , and a slide groove is arranged on the movable contact 5 , and the slide groove is used to cooperate with the connecting rod 10 .

[0033] When the handle 11 is rotated, the lock catch 9 is first driven to rotate through the action of the connecting rod 10, thereby further driving the moving contact 5 to rotate. The connecting rod 10 is provided with a cylindrical foot 1001, and the cylindrical foot 1001 is located in the slide groove of the moving contact 5. When the handle 11 is rotated, the lock catch 9 restricts the cylindrical foot 1001 of the connecting rod 10 and the moving contact 5 to the slide groove of the moving contact. When the handle is rotated, the lock catch 9 is driven to rotate together with the moving contact 5, and the circuit breaker completes a closing.

[0034] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, it also includes a tension spring 12, one end of the tension spring 12 is matched with the housing 14, and the other end of the tension spring 12 is matched with the moving contact 5.

[0035] The function of the tension spring 12 is to provide pressure to the moving contact 5 when it is closed and to provide a reset force when it is opened.

[0036] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, a third magnet block 1303 is disposed on the moving contact 5 , and the third magnet block 1303 and the first magnet block 1301 are respectively located on both sides of the second magnet block 1302 .

[0037] The first magnet block 1301 and the third magnet block 1303 are respectively arranged on both sides of the second magnet block 1302. This design is to attract the moving contact 5 from both sides, so that the lock buckle 9 can rotate and return to its original position with pulling force on both sides after rotation, which can reduce the probability of deflection of the lock buckle 9 during rotation.

[0038] Specifically, the first magnet block 1301 , the second magnet block 1302 and the third magnet block 1303 are all pancake-shaped magnet blocks. Magnet blocks with this structure are easy to install on the housing 14 , the lock buckle 9 and the moving contact 5 .

[0039] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, it also includes a terminal 1, which is arranged in the housing, and there are two terminal posts 1.

[0040] Terminal 1 is used for wiring.

[0041] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, an arc extinguishing chamber 3 is also included, and the arc extinguishing chamber 3 is arranged in the housing 14.

[0042] Specifically, it also includes a double metal 7, and a tripping pull rod 8 is installed on the lock 9. When an overcurrent exceeding the tripping threshold passes through the double metal 7, the double metal 7 moves to the right (with the attached Figure 1 And attached Figure 2 The double metal 7 bends in the direction shown in the figure, so that the tripping rod 8 moves, and the tripping rod 8 drives the lock 9 to rotate, unlocking the connecting rod 10 from the moving contact slot, thereby realizing tripping protection.

[0043] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, it also includes an electromagnetic component 2, which is arranged in the shell and connected to the terminal 1.

[0044] The specific electromagnetic component includes a static iron core 201, a moving iron core 203 and a reset spring 202. The reset spring 202 is installed between the static iron core 201 and the moving iron core 203. When the moving iron core 203 pushes the lock to rotate, thereby achieving the disengagement of the moving contact 5 from the static contact 4, the moving iron core 203 will return to its original position under the elastic force of the spring.

[0045] Because the electromagnetic assembly 2 is connected to the terminal 1, when the short-circuit fault current in the line reaches the tripping value, the moving iron core 203 in the electromagnetic assembly hits the lock 9 to unlock it, and the connecting rod 10 slides out of the sliding groove of the moving contact 5, and the product is disconnected.

[0046] The specific electromagnetic assembly 2 also includes a static contact 4

[0047] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, a cylindrical foot 1001 is provided on the connecting rod 10, and the connecting rod 10 cooperates with the handle 11 and the lock buckle 9 through its own cylindrical foot 1001.

[0048] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, a rotating column is arranged in the housing 14, and the lock buckle 9 is rotatably arranged on the rotating column.

[0049] Specifically, the lock buckle 9 and the moving contact 5 are both mounted on the same rotating column, so that the rotation centers of the lock buckle 9 and the rotating column are at the same point, which can improve the stability of the lock buckle 9 and the moving contact 5 during rotation.

[0050] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, the housing 14 includes a housing bottom and a housing cover, and the housing cover and the housing bottom are detachably matched together.

[0051] An arc-starting piece 6 is also arranged in the specific housing.

[0052] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent transformations made using the specification of the present invention, directly or indirectly used in other related technical fields, are also included in the protection scope of the present invention.

Claims

1. A circuit breaker based on a pancake-shaped magnet block, comprising a housing, a lock and a handle, wherein the handle is rotatably mounted on the housing, and one end of the handle is located outside the housing, the lock is rotatably arranged in the housing, and the lock and the handle are connected by a connecting rod, characterized in that: It also includes a first magnet block and a second magnet block, wherein the first magnet block is arranged on the shell wall of the shell, and the second magnet block is arranged on the lock buckle, and the first magnet block and the second magnet block are both in the shape of a round cake; It also includes a moving contact, which is rotatably arranged on the housing, and is provided with a slide groove, which is used to cooperate with the connecting rod; A third magnet block is arranged on the moving contact, and the third magnet block and the first magnet block are respectively located on both sides of the second magnet block; It also includes a terminal, which is arranged on the housing and has two terminals; It also includes an arc extinguishing chamber, which is arranged in the housing; It also includes an electromagnetic component, which is arranged in the shell and connected to the terminal.

2. The circuit breaker based on the disk-shaped magnet block according to claim 1, characterized in that: It also includes a tension spring, one end of which is matched with the housing, and the other end of which is matched with the moving contact.

3. The circuit breaker based on the disk-shaped magnet block according to claim 1, characterized in that: The connecting rod is provided with a cylindrical foot, and the connecting rod cooperates with the handle and the lock buckle through its own cylindrical foot.

4. The circuit breaker based on the disk-shaped magnet block according to claim 1, characterized in that: A rotating column is arranged in the shell, and the lock buckle is rotatably arranged on the rotating column.

5. The circuit breaker based on the disk-shaped magnet block according to claim 1, characterized in that: The shell comprises a shell bottom and a shell cover, and the shell cover and the shell bottom are detachably matched together.

Images