CN110853997A

CN110853997A - Quick closing circuit breaker

Info

Publication number: CN110853997A
Application number: CN201911016222.1A
Authority: CN
Inventors: 黄信桥
Original assignee: Lapos Electric China Co Ltd
Current assignee: Lapos Electric China Co Ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-02-28
Anticipated expiration: 2039-10-24
Also published as: CN110853997B

Abstract

The invention relates to the technical field of circuit breakers. A rapid switching-on circuit breaker comprises an outer shell, a handle assembly, a tripping transmission assembly, a magnetic tripper and a thermal tripper; the shell comprises a base and a cover plate, the cover plate is arranged on the base, the handle assembly is positioned on the upper portion of the base, and the handle assembly is used for manually switching on and off the breaker; the tripping transmission assembly is positioned at the left upper part of the base and is matched with the handle assembly through a transmission rod to realize tripping and buckling; the magnetic release is arranged in the base and is positioned below the handle assembly; the thermal release is arranged on the base and is positioned at the left lower part of the magnetic release; the bottom of the tripping transmission assembly is positioned between the magnetic tripper and the thermal tripper. The advantage of this patent is that realize the rapid switch-on, promotes the power consumption safety and reduces the loss of rear end load electrical apparatus.

Description

Quick closing circuit breaker

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a quick closing circuit breaker.

Background

The existing miniature circuit breaker generally has short circuit and overload protection functions, and once short circuit or overload occurs, the circuit breaker will trip, for example, a trip indicating device for the circuit breaker and the circuit breaker disclosed in the chinese utility model patent with publication number CN203456394U publication No. 2014.02.26. The trip indicating device comprises: the magnetic tripping connecting rod is rotatably fixed on a shaft of a tripping actuating mechanism of the circuit breaker; a first trip indicator having a tab and having a first fault indication indicia area on a front surface thereof that is exposable through a first window opening in a housing of the circuit breaker; and a second trip indicator disposed alongside the first trip indicator, having a projection, and having a second fault indication indicia area on a front surface thereof that is exposable through a second window open in a housing of the circuit breaker. When the circuit breaker is magnetically tripped, the first fault indication mark area and the second fault indication mark area are exposed, and when the circuit breaker is thermally tripped, only the first fault indication mark area is exposed, and the second fault indication mark area is not exposed. According to the utility model discloses, can clearly and definitely indicate short-circuit fault, overload fault and artificial disconnection.

At present, the existing circuit breaker can not realize the force accumulation when moving from an opening state to a closing state, thereby resulting in that the closing efficiency is slower, the electricity safety problem is easy to occur and the loss of a rear-end load electrical appliance is increased in the closing process.

Disclosure of Invention

The invention aims to solve the problem of switching-on of the existing circuit breaker, and provides a quick switching-on circuit breaker which can realize quick switching-on by storing power in the switching-on process and improving the switching-on efficiency, thereby improving the power utilization safety and reducing the loss of a rear-end load electrical appliance.

For the purpose of the invention, the following technical scheme is adopted for realizing the purpose:

a quick switching-on circuit breaker comprises an outer shell, a tripping transmission assembly, a magnetic tripper, a thermal tripper and a handle assembly; the shell comprises a base and a cover plate, the cover plate is arranged on the base, the handle assembly is positioned on the upper portion of the base, and the handle assembly is used for manually switching on and off the breaker; the tripping transmission assembly is positioned at the left upper part of the base and is matched with the handle assembly through a transmission rod to realize tripping and buckling; the magnetic release is arranged in the base and is positioned below the handle assembly; the thermal release is arranged on the base and is positioned at the left lower part of the magnetic release; the bottom contact point of the tripping transmission assembly is positioned between the magnetic tripper and the thermal tripper;

the handle assembly comprises a handle rotating part and a handle closing force storage part; the handle rotating assembly comprises a handle; a plurality of inner core matching lugs are arranged on the inner side of the outer ring of the handle; the handle rapid closing part comprises a handle inner core and a handle rapid piece; the handle inner core is sleeved on the handle; a handle force storage part for providing potential energy for the handle inner core and the handle is also arranged between the handle inner core and the handle; the outer ring of the handle inner core is provided with a handle matching groove matched with the inner core matching lugs; the handle inner core is driven to rotate by the handle, and the handle inner core is steered to the power storage contact point of the handle quick piece to pause; the handle inner core is provided with a rapid piece matching lug; the rapid piece matching lug is provided with a matching notch; the handle rapid piece is provided with an arc-shaped matching block, and the upper side surface of the arc-shaped matching block is provided with a rapid matching concave surface; the quick-fit concave surface is a force accumulation contact point when contacting the fit notch, the force accumulation contact point is reached, the force accumulation part starts to accumulate force for waiting through the handle, the handle continues to move from the brake-off state to the brake-on state until contacting the handle quick part, and the handle quick part is enabled to be ejected away from the original state until the handle inner core is quickly separated from the handle quick part to realize quick brake-on.

Preferably, a handle rod is arranged on the outer ring of the handle; the middle part of the handle is provided with a base matching convex column, the handle is sleeved on the base through the base matching convex column, and an inner core matching groove is formed between the base matching convex column and the outer wall of the handle.

Preferably, a transmission rod insertion hole is formed in the outer ring of the front part of the handle inner core; the middle part of the handle inner core is provided with a handle matching hole which is sleeved on the base matching convex column, and the handle inner core is positioned in the inner core matching groove; a convex ring is arranged on the handle matching hole; the rapid piece matching lug is arranged on the outer side wall of the convex ring.

Preferably, the handle force storage part is a handle torsion spring which is sleeved on the base matching convex column and is positioned in a torsion spring groove at the rear part of the handle inner core.

Preferably, the tripping transmission assembly comprises a contact support, a tripping buckle, a lock catch, a transmission contact and a hinged matching shaft; the contact support is sleeved on the base; the middle part of the contact support is provided with a tripping matching groove; the lock catch is matched with the upper part of the tripping matching groove; the upper part of the contact support is provided with an arc-shaped transmission rod groove, and the lock catch is provided with a transmission rod matching insertion hole; the other end of the transmission rod penetrates through the arc-shaped transmission rod groove and is inserted into the transmission rod matching insertion hole; the jump buckle is sleeved on the base and is positioned below the contact support; the middle part of the jump buckle is provided with a contact support matching groove; the lower part of the contact support is positioned in the contact support matching groove; the bottom of the jump buckle is provided with a tripping connecting rod groove; the transmission contact is positioned at the lower part of the tripping matching groove, and the upper part of the transmission contact is provided with an arc-shaped contact groove; the hinged matching shaft sequentially penetrates through the jump buckle and the contact support to be inserted into the contact groove, and the bottom of the transmission contact is positioned between the magnetic release and the thermal release to swing; a jump buckle spring is arranged between the middle part of the contact support and the upper part of the jump buckle; and a transverse contact spring is arranged between the lower part of the contact support and the right part of the base.

Preferably, the thermal release is a bimetallic plate, the bimetallic plate comprises a first metal plate and a second metal plate, the lower part of the first metal plate is connected with the lower part of the second metal plate, and the first metal plate and the second metal plate are in a V shape; a metal plate matching block is arranged on the base and positioned on the right side of the upper part of the second metal plate; the lower part of the metal plate matching block is sleeved on the base, the middle part of the metal plate matching block is provided with a tripping connecting rod hole, and a tripping connecting rod is connected between the tripping connecting rod hole and the tripping connecting rod groove.

Preferably, the magnetic release comprises a coil support, a coil sleeve, a coil and a coil contact; the coil support set up on the base, coil sleeve transversely set up on the coil support, the coil winding on the coil sleeve, the coil contact pass through the coil connecting plate and set up the right part at the coil support.

Preferably, an arc extinguisher is further arranged in the shell, the arc extinguisher is positioned below the magnetic release, and the arc extinguisher comprises a grid plate partition plate and a plurality of arc extinguishing grid plates; the arc extinguishing grid pieces are longitudinally and regularly arranged on the grid piece partition plate, and the arc extinguishing grid pieces positioned at the top are connected with the magnetic release through the upper arc guide plate; an arc guide elastic sheet is arranged in the upper arc guide plate; the arc extinguishing grid sheet positioned at the bottom is connected with the thermal release through the lower arc guide plate.

Preferably, wire seats are arranged in two sides of the base, and screws are arranged on the two wire seats.

Preferably, the outer parts of the left side and the right side of the base are both provided with dust covers.

Adopt a swift combined floodgate circuit breaker of above-mentioned technical scheme, this circuit breaker passes through the cooperation of handle and handle inner core to and the cooperation of handle inner core and the quick piece of handle, thereby it makes transmission contact and coil contact reach the combined floodgate state fast to be convenient for hold power, and then furthest shortens combined floodgate time, promotes the power consumption safety and reduces the loss of rear end load electrical apparatus.

To sum up, thereby the advantage of this patent realizes holding power and carries out the rapid switch-on, promotes the power consumption safety and reduces the loss of rear end load electrical apparatus.

Drawings

Fig. 1 is a schematic structural diagram of the quick closing circuit breaker of the present invention.

Fig. 2 is a schematic structural view of the handle assembly and the trip transmission assembly.

Fig. 3 is a schematic diagram of the structure of the magnetic trip, the thermal trip and the arc extinguisher.

Detailed Description

As shown in fig. 1, a circuit breaker that quickly closes a switch includes an outer case, a handle assembly 2, a trip transmission assembly 3, a magnetic trip 4, and a thermal trip 5; the shell body includes base 1 and apron, and the apron setting is on base 1, and handle assembly 2 is located base 1's upper portion, and handle assembly 2 is used for the manual separating brake and the combined floodgate that carry out the circuit breaker. The tripping transmission component 3 is positioned at the left upper part of the base 1, and the tripping transmission component 3 is matched with the handle component 2 through the transmission rod 20 to realize tripping and buckling. The magnetic release 4 is arranged in the base 1 and is positioned below the handle component 2; the thermal release 5 is arranged on the base 1 and is positioned at the left lower part of the magnetic release 4; the bottom of the trip transmission assembly 3 is located between the magnetic trip 4 and the thermal trip 5. All be provided with wire seat 8 in the both sides of base 1, be convenient for better carry out the wire through wire seat 8. The two wire seats 8 are provided with screws 81, so that the wire seats can be fixed better. The left and right sides outside of base all is provided with dust cover 9, is convenient for further promote dustproof effect through dust cover 9, promotes the power consumption safety.

As shown in fig. 1 and 2, the handle assembly 2 includes a handle rotating part and a handle closing power accumulating part; the handle rotating part comprises a handle 21; the handle closing force storage component comprises a handle inner core 22 and a handle rapid piece 23; a handle bar 211 is provided on the outer circumference of the handle 21, and the handle bar 211 is further convenient for the user to use. The middle part of the handle 21 is provided with a base matching convex column 212, the handle is sleeved on the base 1 through the base matching convex column 212, and the base matching convex column 212 is convenient to be matched with the base better. The inner side of the outer ring of the handle 21 is provided with a plurality of inner core matching lugs 210, so that the handle inner core 22 can be better matched with the inner core. An inner core matching groove 213 is formed between the base matching convex column 212 and the outer wall of the handle 21, and the inner core matching groove 213 is convenient for better matching with the handle inner core 22, so that the matching degree is improved. A transmission rod insertion hole 220 is formed in the outer ring of the top of the handle inner core 22, one end of the transmission rod 20 is inserted into the transmission rod insertion hole 220, and the transmission rod 20 and the transmission rod insertion hole 220 are convenient to be matched with the tripping transmission assembly 3 better, so that the transmission effect is improved. The outer ring of the handle inner core 22 is provided with a handle matching groove 224 matched with the inner core matching projections 210, so that the handle 21 can more effectively drive the handle inner core 22 to rotate. Handle inner core 22 middle part is provided with handle mating holes 221, and handle mating holes 221 cover is established on base cooperation boss 212, and handle inner core 22 is located inner core cooperation groove 213, is convenient for better cover through handle mating holes 221 and establishes on base cooperation boss 212 to more effective cooperation is rotatory. A convex ring 222 is arranged on the handle matching hole 221; the outer side wall of the convex ring 222 is provided with a rapid piece matching convex block 223, and the rapid piece matching convex block 223 is matched with the handle rapid piece 23. A matching notch 2231 is arranged on the rapid piece matching convex block 223; one end of the handle rapid piece 23 is sleeved on the base 1, the other end of the handle rapid piece 23 is provided with an arc-shaped matching block 231, and the upper side surface of the arc-shaped matching block 231 is provided with a rapid matching concave surface 232; quick-fit concave surface 232 cooperatees with cooperation breach 2231 to carry out the contact through quick-fit concave surface 232 and cooperation breach 2231 and hold the power point and wait for and hold power, thereby the more quick closes a floodgate, promotes the efficiency of closing a floodgate. A handle torsion spring 211 is arranged between the handle 21 and the base 1, and the handle inner core 22 is reversely acted through the handle torsion spring 211, so that the handle inner core 22 is contacted with the handle rapid piece 23 to store force.

As shown in fig. 2, the trip transmission assembly 3 includes a contact support 31, a trip buckle 32, a lock catch 33, a transmission contact 34 and a hinge-coupling shaft 35; the contact support 31 is sleeved on the base 1; the middle part of the contact support 31 is provided with a tripping matching groove 311, and the tripping matching groove 311 is convenient for being matched with the lock catch 33 to perform transmission. The latch 33 is fitted to an upper portion of the trip fitting groove 311, and is rotated by the latch 33 and the contact holder 31 being fitted to each other. The upper part of the contact support 31 is provided with an arc-shaped transmission rod groove 312, and the lock catch 33 is provided with a transmission rod matching insertion hole 331; the other end of the transmission rod 20 passes through the arc-shaped transmission rod slot 312 and is inserted into the transmission rod matching insertion hole 331, the handle 21 drives the handle inner core 22 to rotate, the transmission rod 20 drives the contact support 31 to rotate, and further, the better rotation is realized to realize the switching-on. The jump buckle 32 is sleeved on the base 1 and is positioned below the contact support 31; the middle of the jumper 32 is provided with a contact support matching groove 321, and the contact support matching groove 321 is convenient for better matching with the contact support 31. A jump buckle spring 36 is arranged between the middle part of the contact support 31 and the upper part of the jump buckle 32, and the jump buckle spring 36 is convenient for better rotation and elastic recovery, thereby improving the transmission efficiency. The lower portion of the contact holder 31 is located in the contact holder fitting groove 321, so that transmission fitting is effectively performed, and rapid switching-on is achieved. The bottom of the jump buckle 32 is provided with a tripping connecting rod groove 322; the transmission contact 34 is positioned at the lower part of the tripping matching groove 311, and the upper part of the transmission contact 34 is provided with an arc-shaped contact groove 341; the hinge-joint matching shaft 35 sequentially penetrates through the jump buckle 32 and the contact support 31 to be inserted into the contact groove 341, and the hinge-joint matching shaft 35 is convenient for better rotation limiting, so that each part is matched with each other and rotates mutually, and better transmission matching is realized. A transverse contact spring 37 is arranged between the lower part of the contact support 31 and the right part of the base, and the transverse contact spring 37 is convenient for better stretching and transmission, so that better rotating fit is realized. The bottom of the transmission contact 34 is positioned between the magnetic release 4 and the thermal release 5 to swing, and the magnetic release 4 is contacted to realize closing and the thermal release 5 is contacted to realize opening.

During operation, the handle 21 drives the handle inner core 22 to rotate to the power accumulation contact point of the handle rapid piece 23 for pause, the handle torsion spring 211 is reversely twisted to start power accumulation waiting, the handle 21 continues to move from the opening state to the closing state until the contact point contacts the handle rapid piece 23, the handle rapid piece 23 is ejected from the original state until the handle inner core 22 is rapidly separated from the handle rapid piece 23, the handle inner core 22 rotates and simultaneously drives the contact support 31 and the lock catch 33 to rotate through the transmission rod 20, so that the contact support 31 drives the trip 32 and the transmission contact 34 to move towards the magnetic trip 4, and when the handle inner core 22 is rapidly separated from the handle rapid piece 23, the transmission contact 34 is further contacted with the coil contact 44 in the magnetic trip 4 to realize rapid closing.

The handle inner core 22 and the handle rapid piece 23 in the handle assembly 2 are matched with each other to realize rapid switch-on, and the handle assembly 2 and the tripping transmission assembly 3 are matched with each other in a transmission manner, so that the transmission efficiency and the transmission effect are further improved.

As shown in fig. 1 and 3, the magnetic release 4 includes a coil holder 41, a coil sleeve 42, a coil 43, and a coil contact 44; the coil support 41 is arranged on the base 1, the coil sleeve 42 is transversely arranged on the coil support 41, the coil 43 is wound on the coil sleeve 42, the coil contact 44 is arranged at the right part of the coil support 41 through the coil connecting plate, the coil contact is in contact with the transmission contact 34 to realize closing, and the magnetic release 4 is used for further and effectively performing closing and closing control.

As shown in fig. 3, the thermal trip 5 is a bimetal plate, the bimetal plate includes a first metal plate 51 and a second metal plate 52, the lower portion of the first metal plate 51 is connected with the lower portion of the second metal plate 52, and the first metal plate 51 and the second metal plate 52 are V-shaped, so that the V-shaped arrangement is convenient for further saving the installation control, and simultaneously, the thermal trip is better controlled. A metal plate fitting block 53 is provided on the base on the right side of the upper portion of the second metal plate 52, and the second metal plate 52 is easily pressed by the metal plate fitting block 53, so that the transmission contact 34 is better contacted with the first metal plate 51. (ii) a The lower part cover of metal sheet cooperation piece 53 is established on base 1, and the middle part of metal sheet cooperation piece 53 is provided with dropout connecting rod hole 531, is connected with dropout connecting rod 6 between dropout connecting rod hole 531 and the dropout connecting rod groove 322, is convenient for further effectually will promote the transmission complex through dropout connecting rod 6 simultaneously, also is convenient for further press first metal sheet 51 to transmission contact 34, makes the contact more fully be convenient for better dropout.

As shown in fig. 3, an arc extinguisher 7 is further disposed in the housing 1, the arc extinguisher 7 is located below the magnetic release 4, and the arc extinguisher 7 includes a grid plate partition 71 and a plurality of arc extinguishing grid plates 72; a plurality of arc-extinguishing grid plates 72 are longitudinally and regularly arranged on the grid plate partition plate 71, and the arc-extinguishing grid plates 72 positioned at the top are connected with the magnetic release 4 through upper arc-guiding plates 73; an arc guiding elastic sheet 731 is arranged in the upper arc guiding plate 73; arc extinguishing bars piece 72 that is located the bottom links up with thermal release 5 through leading arc board 74 down, through arc extinguisher 7 and leading arc board 73 and leading the cooperation between the arc board 74 down, be convenient for better cooperate with magnetic release 4 and thermal release 5 to better realization is closed a floodgate and is separated floodgate fast, and further promotes the security of using.

The using method of the rapid switching-on circuit breaker sequentially comprises the following steps: the handle 21 drives the handle inner core 22 to rotate to the power accumulation contact point of the handle rapid piece 23 for pause, the handle torsion spring 211 reversely twists to start power accumulation waiting, the handle 21 continues to move from the switching-off state to the switching-on state until the contact point contacts the handle rapid piece 23, the handle rapid piece 23 is jacked away from the original state until the handle inner core 22 and the handle rapid piece 23 are rapidly separated, and therefore the tripping transmission assembly 3 and the magnetic tripping device 4 are enabled to achieve rapid contact switching-on.

To sum up, thereby the advantage of this patent is held power and is realized closing rapidly at closing a floodgate in-process, promotes the power consumption safety and reduces the loss of rear end load electrical apparatus.

Claims

1. A quick switching-on circuit breaker is characterized by comprising an outer shell, a tripping transmission assembly (3), a magnetic trip (4), a thermal trip (5) and a handle assembly (2); the outer shell comprises a base (1) and a cover plate, the cover plate is arranged on the base (1), the handle assembly (2) is located on the upper portion of the base (1), and the handle assembly (2) is used for manually switching on and off the circuit breaker; the tripping transmission assembly (3) is positioned at the left upper part of the base (1), and the tripping transmission assembly (3) is matched with the handle assembly (2) through a transmission rod (20) to realize tripping and buckling; the magnetic release (4) is arranged in the base (1) and is positioned below the handle assembly (2); the thermal release (5) is arranged on the base (1) and is positioned at the left lower part of the magnetic release (4); the bottom contact point of the tripping transmission assembly (3) is positioned between the magnetic trip (4) and the thermal trip (5);

the handle assembly (2) comprises a handle rotating part and a handle closing force storage part; the handle rotating component comprises a handle (21); a plurality of inner core matching lugs (210) are arranged on the inner side of the outer ring of the handle (21); the handle rapid closing part comprises a handle inner core (22) and a handle rapid part (23); the handle inner core (22) is sleeved on the handle (21); a handle force storage piece (211) for providing potential energy for the handle inner core (22) and the handle (21) is arranged between the handle inner core and the handle; a handle matching groove (224) matched with the inner core matching lugs (210) is formed in the outer ring of the handle inner core (22); the handle inner core (22) is driven to rotate by the handle (21), and the handle inner core (22) is enabled to turn to a power storage contact point of the handle rapid piece (23) to pause; a rapid piece matching lug (223) is arranged on the handle inner core (22); a matching notch (2231) is arranged on the rapid piece matching lug (223); an arc-shaped matching block (231) is arranged on the handle rapid piece (23), and a rapid matching concave surface (232) is arranged on the upper side surface of the arc-shaped matching block (231); when the quick-fit concave surface (232) is in contact with the fit notch (2231), the force accumulation contact point is reached, the force accumulation waiting is started through the handle force accumulation part (211), the handle (21) continues to move from the opening state to the closing state until the handle quick part (23) is contacted, and the handle quick part (23) is enabled to be ejected away from the original state until the handle inner core (22) and the handle quick part (23) are quickly separated to realize quick closing.

2. The quick closing circuit breaker as claimed in claim 1, wherein a handle lever (211) is provided on an outer ring of the handle (21); the middle part of handle (21) is provided with base cooperation projection (212), and the handle passes through base cooperation projection (212) cover and establishes on base (1), base cooperation projection (212) and handle (21) outer wall between be formed with inner core cooperation groove (213).

3. The quick closing circuit breaker according to claim 2, wherein the handle core (22) is provided with a transmission rod insertion hole (220) on a front outer ring thereof; a handle matching hole (221) is formed in the middle of the handle inner core (22), the handle matching hole (221) is sleeved on the base matching convex column (212), and the handle inner core (22) is located in the inner core matching groove (213); a convex ring (222) is arranged on the handle matching hole (221); the quick piece matching lug (223) is arranged on the outer side wall of the convex ring (222).

4. The quick switching-on circuit breaker according to claim 1, wherein the handle power accumulating part (211) is a handle torsion spring, and the handle torsion spring is sleeved on the base matching convex column (212) and is positioned in a torsion spring groove at the rear part of the handle inner core (22).

5. The quick closing circuit breaker according to claim 1, wherein the trip transmission assembly (3) comprises a contact support (31), a trip (32), a latch (33), a transmission contact (34) and a hinge-coupling shaft (35); the contact support (31) is sleeved on the base (1); the middle part of the contact support (31) is provided with a tripping matching groove (311); the lock catch (33) is matched at the upper part of the tripping matching groove (311); the upper part of the contact support (31) is provided with an arc-shaped transmission rod groove (312), and the lock catch (33) is provided with a transmission rod matching insertion hole (331); the other end of the transmission rod (20) penetrates through the arc-shaped transmission rod groove (312) and is inserted into the transmission rod matching insertion hole (331); the jump buckle (32) is sleeved on the base (1) and is positioned below the contact support (31); the middle part of the jump buckle (32) is provided with a contact support matching groove (321); the lower part of the contact support (31) is positioned in the contact support matching groove (321); the bottom of the jump buckle (32) is provided with a tripping connecting rod groove (322); the transmission contact (34) is positioned at the lower part of the tripping matching groove (311), and the upper part of the transmission contact (34) is provided with an arc-shaped contact groove (341); the hinged matching shaft (35) sequentially penetrates through the jump button (32) and the contact support (31) to be inserted into the contact groove (341), and the bottom of the transmission contact (34) is positioned between the magnetic release (4) and the thermal release (5) to swing; a jump button spring (36) is arranged between the middle part of the contact support (31) and the upper part of the jump button (32); and a transverse contact spring (37) is arranged between the lower part of the contact support (31) and the right part of the base.

6. The quick closing circuit breaker according to claim 5, wherein the thermal release (5) is a bimetal plate, the bimetal plate comprises a first metal plate (51) and a second metal plate (52), the lower part of the first metal plate (51) is connected with the lower part of the second metal plate (52), and the first metal plate (51) and the second metal plate (52) are V-shaped; a metal plate matching block (53) is arranged on the right side of the upper part of the second metal plate (52) on the base; the lower part of the metal plate matching block (53) is sleeved on the base (1), a tripping connecting rod hole (531) is formed in the middle of the metal plate matching block (53), and a tripping connecting rod (6) is connected between the tripping connecting rod hole (531) and the tripping connecting rod groove (322).

7. A rapid closing circuit breaker according to claim 1, characterized in that said magnetic trip (4) comprises a coil support (41), a coil sleeve (42), a coil (43) and a coil contact (44); the coil support (41) is arranged on the base (1), the coil sleeve (42) is transversely arranged on the coil support (41), the coil (43) is wound on the coil sleeve (42), and the coil contact (44) is arranged at the right part of the coil support (41) through the coil connecting plate.

8. The quick closing circuit breaker according to claim 1, wherein an arc extinguisher (7) is further arranged in the housing (1), the arc extinguisher (7) is positioned below the magnetic release (4), and the arc extinguisher (7) comprises a grid partition plate (71) and a plurality of arc extinguishing grids (72); the arc extinguishing grid plates (72) are longitudinally and regularly arranged on the grid plate partition plate (71), and the arc extinguishing grid plates (72) positioned at the top are connected with the magnetic release (4) through upper arc guide plates (73); an arc guiding elastic sheet (731) is arranged in the upper arc guiding plate (73); the arc extinguishing grid sheet (72) positioned at the bottom is connected with the thermal release (5) through a lower arc guiding plate (74).

9. The quick closing circuit breaker according to claim 1, wherein the two sides of the base (1) are respectively provided with a wire base (8), and the two wire bases (8) are respectively provided with a screw (81).

10. The quick closing circuit breaker as claimed in claim 1, wherein dust covers (9) are disposed outside of the left and right sides of the base (1).