阅读说明：本技术 一种小型断路器 (Small-sized circuit breaker ) 是由 周维峰 林凯 胡广召 于 2020-12-25 设计创作，主要内容包括：本发明涉及一种小型断路器,包括有底座、中座、上盖,中座位于底座和上盖之间,中座和底座之间为第一空间,中座与上盖之间为第二空间,第一空间内设置有N极触头装置,第二空间内设置有L极触头装置、灭弧室和双金拉杆机构,中座上方设置有动触头座动作机构和脱扣器,动触头座动作机构包括有动触头座、锁扣、锁扣推杆机构、连接杆和手柄,连接杆的第一端活动设置在手柄上,第二端设在动触头座上,L极触头装置的L极动触头和N极触头装置的N极动触头均设置在动触头座上,动触头座上设置有凸柱,锁扣通过其上设置的通孔套设在凸柱上。通过采用上述方案,采用了一种新的方式对连接杆第二端进行锁定或解锁,实现断路器合闸或断开的动作。(The invention relates to a miniature circuit breaker, which comprises a base, a middle seat and an upper cover, wherein the middle seat is positioned between the base and the upper cover, a first space is formed between the middle seat and the base, a second space is formed between the middle seat and the upper cover, an N-pole contact device is arranged in the first space, an L-pole contact device, an arc extinguish chamber and a double-gold pull rod mechanism are arranged in the second space, a moving contact seat action mechanism and a tripper are arranged above the middle seat, the moving contact seat action mechanism comprises a moving contact seat, a lock catch push rod mechanism, a connecting rod and a handle, the first end of the connecting rod is movably arranged on the handle, the second end of the connecting rod is arranged on the moving contact seat, an L-pole moving contact of the L-pole contact device and an N-pole moving contact of the N-pole contact device are both arranged on the moving contact seat, and the lock catch is. By adopting the scheme, a new mode is adopted to lock or unlock the second end of the connecting rod, so that the action of switching on or switching off the circuit breaker is realized.)

1. The utility model provides a miniature circuit breaker, is including base, well seat, upper cover, and well seat is located between base and the upper cover, is first space between well seat and the base, is the second space between well seat and the upper cover, is provided with N utmost point contact device in the first space, is provided with L utmost point contact device, explosion chamber and two golden pull rod mechanisms in the second space, well seat top is provided with moving contact base actuating mechanism and release, its characterized in that: the moving contact seat action mechanism comprises a moving contact seat, a lock catch push rod mechanism, a connecting rod and a handle, wherein the first end of the connecting rod is movably arranged on the handle, the second end of the connecting rod is arranged on the moving contact seat, an L-pole moving contact of an L-pole contact device and an N-pole moving contact of an N-pole contact device are both arranged on the moving contact seat, a convex column is arranged on the moving contact seat, the lock catch is sleeved on the convex column through a through hole arranged on the convex column, the lock catch push rod mechanism comprises a spring and a push rod, the elastic force of the spring acts on the push rod, the top end of the push rod is abutted against the lock catch, a sliding groove is arranged above the moving contact seat and comprises a bending part and a straight part, the bending part of the sliding groove is upwards bent at one end close to the handle, the bending part and the straight part are in conduction arrangement, an abutting arm is arranged at the upper, the contact surface of the lock catch is close to the bent part of the sliding groove so as to lock the second end of the connecting rod at the bent part of the sliding groove, and the second end of the connecting rod can push the handle to close the circuit breaker after being locked at the bent part of the sliding groove; after the circuit breaker is switched on, a release of the circuit breaker acts on the lock catch to enable the lock catch to rotate, the collision surface loses the locking of the second end of the connecting rod, and the second end of the connecting rod can slide into the straight part of the sliding groove to realize the switching-off of the circuit breaker; the movable contact seat is provided with an L-pole movable contact on a convex column at one side of the movable contact seat for mounting the lock catch, one side of the movable contact seat for mounting the L-pole movable contact is a first side, the other side of the movable contact seat is provided with a second convex column coaxial with the convex column, the second convex column is provided with an N-pole movable contact, the side of the movable contact seat is a second side, the convex column of the movable contact seat and the second convex column are provided with through holes communicated with each other, the base is provided with a first boss, the first boss is integrally provided with a first shaft, the periphery of the joint part of the first shaft and the first boss is provided with a first annular groove, the second convex column is sleeved at the rear part of the first shaft and abutted against the first annular groove, the upper cover is provided with a second boss, the second boss is integrally provided with a second shaft, the periphery of the joint part of the second shaft and the second boss is provided with a second annular groove, the convex column is sleeved at the rear part, the width of the cross section of the first annular groove is larger than the wall thickness of the second convex column, the width of the cross section of the second annular groove is larger than the wall thickness of the convex column, the length of the first shaft is larger than that of the second shaft, the first shaft abuts against the second shaft after the moving contact seat is installed on the base and the upper cover, and the abutting position is located in the second convex column.

2. A miniature circuit breaker according to claim 1, wherein: a first run-on plate and a second run-on plate are arranged in the second space, wherein the first run-on plate is provided with a static contact of an L-pole contact device, the first run-on plate is positioned below the static contact and bends downwards to form an arch part, the second run-on plate is provided with an inclined edge which is inclined upwards, an arc leading area is formed between the arch part and the inclined edge, the middle seat and the upper cover are provided with staggered clapboards at the exhaust port of the arc extinguish chamber, the top ends of the clapboards on the middle seat and the upper cover are mutually lapped to form staggered exhaust through holes, the middle seat is provided with a sunken area which is respectively an arc extinguish chamber mounting area and a buffer chamber, the arc extinguish chamber mounting area and the buffer chamber are separated by mutually staggered clapboards, be provided with the arc piece in the surge chamber, be provided with the exhaust through-hole on the base of surge chamber and the side respectively, the top of surge chamber is provided with the passageway that link up with circuit breaker binding post holding chamber.

3. A miniature circuit breaker according to claim 2, wherein: the flash barrier all sets up on well seat and upper cover, it is even as an organic whole with the baffle on the well seat to have two flash barriers at least on the well seat, and the flash barrier on the well seat is the crooked setting downwards, on cover at least two flash barriers and on cover the baffle even as an organic whole, the flash barrier on the upper cover is the crooked setting downwards, well seat and on cover and be provided with the long protruding muscle of bending shape on the position that corresponds the run-on zone respectively, the setting direction of long protruding muscle is roughly the same with the hypotenuse direction of second run-on plate.

4. A miniature circuit breaker according to claim 1 or 2, wherein: a third arc striking plate and a fourth arc striking plate are arranged in the first space, a static contact of an N-pole contact device is arranged on the third arc striking plate, an arch part is arranged below the static contact, the fourth arc striking plate comprises a second bevel edge, the second bevel edge and the arch part of the third arc striking plate are oppositely arranged to form an N-pole arc striking area, a first buffer area is arranged on the middle seat below the second bevel edge, the N-pole arc striking area is connected with the first buffer area, the first buffer area is arranged in a concave manner, a through hole communicated with the outside is arranged on the bottom edge of the first buffer area, baffles are arranged on the middle seat and the base and close to the through hole, the bottom foot portion of the middle base is provided with a second buffer area, a protruding portion is arranged on the middle base and located between the first buffer area and the second buffer area, a channel is formed between the protruding portion and the base in an interval mode, and the channel enables the first buffer area and the second buffer area to be communicated.

5. A miniature circuit breaker according to claim 4, wherein: the base is provided with exhaust holes at the position of the second buffer area, the exhaust holes form the second buffer area and are communicated with the outside, the fourth arc striking plate comprises a transverse edge and a second inclined edge, the transverse edge is matched with the convex ribs or clamping tables on the middle base and the base to realize fixed installation, long convex ribs are arranged on the middle base and the base corresponding to the arc striking area, and the direction of the long convex ribs is generally integrated with the direction of the second inclined edge.

6. A miniature circuit breaker according to claim 1 or 2, wherein: the movable contact seat is provided with a convex block at the periphery of the sliding groove, the convex block is provided with an arc surface at the bent part, the arc surface and the bent part are connected into a whole to form a pressing limiting surface of the second end of the connecting rod, a positioning block is arranged below the convex block, the bottom of the convex column at the first side of the movable contact seat is provided with an arc convex column around one circumference, a convex rib is arranged on the plane of the periphery of the convex column at the first side of the movable contact seat, a lock catch is provided with an installation through hole, the installation through hole of the lock catch is sleeved on the convex column at the first side and forms rotating fit with the arc convex column, an L-pole movable contact is sleeved on the convex column at the first side and the side surface of the L-pole movable contact is abutted against or close to the end part of the arc convex column, a first bayonet is arranged on the movable contact seat, a concave cavity is arranged at the, a first torsion spring is arranged between the L-pole moving contact and the moving contact seat, the first torsion spring is also sleeved on the convex column at the first side, a first torsion arm of the first torsion spring is abutted in the limit groove, a second torsion arm of the first torsion spring is abutted on the first bayonet of the L-pole moving contact, the end wall of the second torsion arm of the first torsion spring is provided with a bending part which is inserted into the cavity below the first bayonet, the L-pole moving contact is provided with a positioning sheet which is positioned between the positioning block and the convex block of the moving contact seat, the abutting of the positioning sheet and the positioning block or the convex block forms the limit of the rotation angle of the L-pole moving contact, a connecting column is arranged above the second convex column at the second side of the moving contact seat, the periphery of the connecting column is provided with a convex edge around one circumference thereof, the convex edge is respectively provided with an abutting surface and an abutting boss, a third torsion spring is sleeved on the connecting column, and, a second torsion arm of a third torsion spring can be abutted against the abutting boss, a second stop block is arranged below the abutting boss, a positioning notch is formed between the second stop block and the side surface of the second side of the moving contact seat, a second bayonet is arranged on the N-pole moving contact, a second concave cavity is arranged on the second side of the moving contact seat and corresponds to the second bayonet, the N-pole moving contact is sleeved on a second convex column on the second side of the moving contact seat, a second torsion spring is arranged between the N-pole moving contact and the moving contact seat and is also sleeved on the second convex column on the second side of the moving contact seat, a first torsion arm of the second torsion spring is abutted against the positioning notch, a second torsion arm of the second torsion spring is abutted against the second bayonet of the N-pole moving contact, the end part of the second torsion arm of the second torsion spring is inserted into the second concave cavity after being bent, a positioning lug is arranged on the second side of the moving contact seat, and an N limit sheet is arranged on the N-pole moving contact and positioned between the positioning lug and the abutting boss, the N limit position block and the positioning lug or the conflict lug boss conflict to form the limit of the rotation angle of the N pole moving contact.

7. A miniature circuit breaker according to claim 4, wherein: the movable contact seat is provided with a convex block at the periphery of the sliding groove, the convex block is provided with an arc surface at the bent part, the arc surface and the bent part are connected into a whole to form a pressing limiting surface of the second end of the connecting rod, a positioning block is arranged below the convex block, the bottom of the convex column at the first side of the movable contact seat is provided with an arc convex column around one circumference, a convex rib is arranged on the plane of the periphery of the convex column at the first side of the movable contact seat, a lock catch is provided with an installation through hole, the installation through hole of the lock catch is sleeved on the convex column at the first side and forms rotating fit with the arc convex column, an L-pole movable contact is sleeved on the convex column at the first side and the side surface of the L-pole movable contact is abutted against or close to the end part of the arc convex column, a first bayonet is arranged on the movable contact seat, a concave cavity is arranged at the, a first torsion spring is arranged between the L-pole moving contact and the moving contact seat, the first torsion spring is also sleeved on the convex column at the first side, a first torsion arm of the first torsion spring is abutted in the limit groove, a second torsion arm of the first torsion spring is abutted on the first bayonet of the L-pole moving contact, the end wall of the second torsion arm of the first torsion spring is provided with a bending part which is inserted into the cavity below the first bayonet, the L-pole moving contact is provided with a positioning sheet which is positioned between the positioning block and the convex block of the moving contact seat, the abutting of the positioning sheet and the positioning block or the convex block forms the limit of the rotation angle of the L-pole moving contact, a connecting column is arranged above the second convex column at the second side of the moving contact seat, the periphery of the connecting column is provided with a convex edge around one circumference thereof, the convex edge is respectively provided with an abutting surface and an abutting boss, a third torsion spring is sleeved on the connecting column, and, a second torsion arm of a third torsion spring can be abutted against the abutting boss, a second stop block is arranged below the abutting boss, a positioning notch is formed between the second stop block and the side surface of the second side of the moving contact seat, a second bayonet is arranged on the N-pole moving contact, a second concave cavity is arranged on the second side of the moving contact seat and corresponds to the second bayonet, the N-pole moving contact is sleeved on a second convex column on the second side of the moving contact seat, a second torsion spring is arranged between the N-pole moving contact and the moving contact seat and is also sleeved on the second convex column on the second side of the moving contact seat, a first torsion arm of the second torsion spring is abutted against the positioning notch, a second torsion arm of the second torsion spring is abutted against the second bayonet of the N-pole moving contact, the end part of the second torsion arm of the second torsion spring is inserted into the second concave cavity after being bent, a positioning lug is arranged on the second side of the moving contact seat, and an N limit sheet is arranged on the N-pole moving contact and positioned between the positioning lug and the abutting boss, the N limit position block and the positioning lug or the conflict lug boss conflict to form the limit of the rotation angle of the N pole moving contact.

8. A miniature circuit breaker according to claim 6, wherein: the second end of connecting rod is contradicted on pressing spacing face after the circuit breaker combined floodgate, and the handle is less than 180 degrees to the thrust direction that the connecting rod second end produced and is pressed spacing contained angle between the thrust direction that produces towards the connecting rod second end this moment, and the face of contradicting on the conflict arm is L shape, and the below of face of contradicting is provided with makes things convenient for the connecting rod second end to slide into the flexion inclined plane, the bottom periphery of spout is provided with the recess.

9. A miniature circuit breaker according to claim 7, wherein: the second end of connecting rod is contradicted on pressing spacing face after the circuit breaker combined floodgate, and the handle is less than 180 degrees to the thrust direction that the connecting rod second end produced and is pressed spacing contained angle between the thrust direction that produces towards the connecting rod second end this moment, and the face of contradicting on the conflict arm is L shape, and the below of face of contradicting is provided with makes things convenient for the connecting rod second end to slide into the flexion inclined plane, the bottom periphery of spout is provided with the recess.

Technical Field

The present invention relates to a miniature circuit breaker.

Background

The existing circuit breaker product locking mechanism is generally provided with a lever, a lock catch and a jump buckle, the structure is complex, the cost is high, the jump buckle is in automatic assembly with unfavorable volume, the number of product parts is large, and the product has failure risk.

Disclosure of Invention

The invention overcomes the problems in the prior art and provides a novel miniature circuit breaker with reasonable structure and stable work.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a miniature circuit breaker, is including base, well seat, upper cover, and well seat is located between base and the upper cover, is first space between well seat and the base, is the second space between well seat and the upper cover, is provided with N utmost point contact device in the first space, is provided with L utmost point contact device, explosion chamber and two golden pull rod mechanisms in the second space, well seat top is provided with moving contact base actuating mechanism and release, its characterized in that: the moving contact seat action mechanism comprises a moving contact seat, a lock catch push rod mechanism, a connecting rod and a handle, wherein the first end of the connecting rod is movably arranged on the handle, the second end of the connecting rod is arranged on the moving contact seat, an L-pole moving contact of an L-pole contact device and an N-pole moving contact of an N-pole contact device are both arranged on the moving contact seat, a convex column is arranged on the moving contact seat, the lock catch is sleeved on the convex column through a through hole arranged on the convex column, the lock catch push rod mechanism comprises a spring and a push rod, the elastic force of the spring acts on the push rod, the top end of the push rod is abutted against the lock catch, a sliding groove is arranged above the moving contact seat and comprises a bending part and a straight part, the bending part of the sliding groove is upwards bent at one end close to the handle, the bending part and the straight part are in conduction arrangement, an abutting arm is arranged at the upper, the contact surface of the lock catch is close to the bent part of the sliding groove so as to lock the second end of the connecting rod at the bent part of the sliding groove, and the second end of the connecting rod can push the handle to close the circuit breaker after being locked at the bent part of the sliding groove; after the circuit breaker is switched on, a release of the circuit breaker acts on the lock catch to enable the lock catch to rotate, the collision surface loses the locking of the second end of the connecting rod, and the second end of the connecting rod can slide into the straight part of the sliding groove to realize the switching-off of the circuit breaker; the movable contact seat is provided with an L-pole movable contact on a convex column at one side of the movable contact seat for mounting the lock catch, one side of the movable contact seat for mounting the L-pole movable contact is a first side, the other side of the movable contact seat is provided with a second convex column coaxial with the convex column, the second convex column is provided with an N-pole movable contact, the side of the movable contact seat is a second side, the convex column of the movable contact seat and the second convex column are provided with through holes communicated with each other, the base is provided with a first boss, the first boss is integrally provided with a first shaft, the periphery of the joint part of the first shaft and the first boss is provided with a first annular groove, the second convex column is sleeved at the rear part of the first shaft and abutted against the first annular groove, the upper cover is provided with a second boss, the second boss is integrally provided with a second shaft, the periphery of the joint part of the second shaft and the second boss is provided with a second annular groove, the convex column is sleeved at the rear part, the width of the cross section of the first annular groove is larger than the wall thickness of the second convex column, the width of the cross section of the second annular groove is larger than the wall thickness of the convex column, the length of the first shaft is larger than that of the second shaft, the first shaft abuts against the second shaft after the moving contact seat is installed on the base and the upper cover, and the abutting position is located in the second convex column.

By adopting the scheme, the second end of the connecting rod is locked or unlocked in a new mode, and the switching-on or switching-off action of the circuit breaker is realized, so that the mode is convenient to install, stable in action and free from misoperation; the flexion sets to the kickup, and the handle is opposite with traditional circuit breaker at the combined floodgate position with the dropout position like this, satisfies different customers 'demand, and traditional circuit breaker can't realize the reversal, and what above-mentioned scheme can be convenient in addition installs the moving contact seat on base and upper cover, and foretell mounting means has multiple insurance efficiency, no matter be projection or axle break off, can not influence work, and the product still can continue to use, and it is also very convenient to install in addition.

The invention further provides that: a first run-on plate and a second run-on plate are arranged in the second space, wherein the first run-on plate is provided with a static contact of an L-pole contact device, the first run-on plate is positioned below the static contact and bends downwards to form an arch part, the second run-on plate is provided with an inclined edge which is inclined upwards, an arc leading area is formed between the arch part and the inclined edge, the middle seat and the upper cover are provided with staggered clapboards at the exhaust port of the arc extinguish chamber, the top ends of the clapboards on the middle seat and the upper cover are mutually lapped to form staggered exhaust through holes, the middle seat is provided with a sunken area which is respectively an arc extinguish chamber mounting area and a buffer chamber, the arc extinguish chamber mounting area and the buffer chamber are separated by mutually staggered clapboards, the buffer chamber is internally provided with an arc-isolating sheet, the bottom edge and the side edge of the buffer chamber are respectively provided with an exhaust through hole, and a channel communicated with the accommodating cavity of the wiring terminal of the circuit breaker is arranged above the buffer chamber; the flash barrier all sets up on well seat and upper cover, it is even as an organic whole with the baffle on the well seat to have two flash barriers at least on the well seat, and the flash barrier on the well seat is the crooked setting downwards, on cover at least two flash barriers and on cover the baffle even as an organic whole, the flash barrier on the upper cover is the crooked setting downwards, well seat and on cover and be provided with the long protruding muscle of bending shape on the position that corresponds the run-on zone respectively, the setting direction of long protruding muscle is roughly the same with the hypotenuse direction of second run-on plate.

By adopting the scheme, the space between the arc extinguish chamber mounting area and the buffer chamber is as large as possible, wherein the space of the arc extinguish chamber mounting area is large, so that the arc extinguish chamber is large, the arc extinguish effect is good, and the arc extinguish chamber is not easy to crack; the space of surge chamber is big, and the cushioning effect is better, and the reposition of redundant personnel electric arc that the flash barrier in the surge chamber can be fine in addition prevents that electric arc from reigniting, and cooling arc produces gas, improves pressure, makes the better discharge from exhaust through hole of gas.

The invention further provides that: a third arc striking plate and a fourth arc striking plate are arranged in the first space, a static contact of an N-pole contact device is arranged on the third arc striking plate, an arch part is arranged below the static contact, the fourth arc striking plate comprises a second bevel edge, the second bevel edge and the arch part of the third arc striking plate are oppositely arranged to form an N-pole arc striking area, a first buffer area is arranged on the middle seat below the second bevel edge, the N-pole arc striking area is connected with the first buffer area, the first buffer area is arranged in a concave manner, a through hole communicated with the outside is arranged on the bottom edge of the first buffer area, baffles are arranged on the middle seat and the base and close to the through hole, the bottom foot part of the middle base is provided with a second buffer area, a bulge part is arranged on the middle base between the first buffer area and the second buffer area, a channel is formed between the bulge part and the base at intervals, and the channel enables the first buffer area and the second buffer area to be communicated; the base is provided with exhaust holes at the position of the second buffer area, the exhaust holes form the second buffer area and are communicated with the outside, the fourth arc striking plate comprises a transverse edge and a second inclined edge, the transverse edge is matched with the convex ribs or clamping tables on the middle base and the base to realize fixed installation, long convex ribs are arranged on the middle base and the base corresponding to the arc striking area, and the direction of the long convex ribs is generally integrated with the direction of the second inclined edge.

Through adopting above-mentioned scheme, can make electric arc and gas get into first buffer and second buffer, again because first buffer becomes the indent setting, as far as possible like this sets up first buffer, make the cushioning effect better, be provided with the through-hole on the first buffer in addition, high-temperature gas can run out from the through-hole like this, the fender metal ion that the plate washer can be fine runs out, prevents the electric leakage, the setting up of passageway can make the gas of first buffer run to in the second buffer.

The invention further provides that: the movable contact seat is provided with a convex block at the periphery of the sliding groove, the convex block is provided with an arc surface at the bent part, the arc surface and the bent part are connected into a whole to form a pressing limiting surface of the second end of the connecting rod, a positioning block is arranged below the convex block, the bottom of the convex column at the first side of the movable contact seat is provided with an arc convex column around one circumference, a convex rib is arranged on the plane of the periphery of the convex column at the first side of the movable contact seat, a lock catch is provided with an installation through hole, the installation through hole of the lock catch is sleeved on the convex column at the first side and forms rotating fit with the arc convex column, an L-pole movable contact is sleeved on the convex column at the first side and the side surface of the L-pole movable contact is abutted against or close to the end part of the arc convex column, a first bayonet is arranged on the movable contact seat, a concave cavity is arranged at the, a first torsion spring is arranged between the L-pole moving contact and the moving contact seat, the first torsion spring is also sleeved on the convex column at the first side, a first torsion arm of the first torsion spring is abutted in the limit groove, a second torsion arm of the first torsion spring is abutted on the first bayonet of the L-pole moving contact, the end wall of the second torsion arm of the first torsion spring is provided with a bending part which is inserted into the cavity below the first bayonet, the L-pole moving contact is provided with a positioning sheet which is positioned between the positioning block and the convex block of the moving contact seat, the abutting of the positioning sheet and the positioning block or the convex block forms the limit of the rotation angle of the L-pole moving contact, a connecting column is arranged above the second convex column at the second side of the moving contact seat, the periphery of the connecting column is provided with a convex edge around one circumference thereof, the convex edge is respectively provided with an abutting surface and an abutting boss, a third torsion spring is sleeved on the connecting column, and, a second torsion arm of a third torsion spring can be abutted against the abutting boss, a second stop block is arranged below the abutting boss, a positioning notch is formed between the second stop block and the side surface of the second side of the moving contact seat, a second bayonet is arranged on the N-pole moving contact, a second concave cavity is arranged on the second side of the moving contact seat and corresponds to the second bayonet, the N-pole moving contact is sleeved on a second convex column on the second side of the moving contact seat, a second torsion spring is arranged between the N-pole moving contact and the moving contact seat and is also sleeved on the second convex column on the second side of the moving contact seat, a first torsion arm of the second torsion spring is abutted against the positioning notch, a second torsion arm of the second torsion spring is abutted against the second bayonet of the N-pole moving contact, the end part of the second torsion arm of the second torsion spring is inserted into the second concave cavity after being bent, a positioning lug is arranged on the second side of the moving contact seat, and an N limit sheet is arranged on the N-pole moving contact and positioned between the positioning lug and the abutting boss, the N limit position block and the positioning lug or the conflict lug boss conflict to form the limit of the rotation angle of the N pole moving contact.

By adopting the scheme, the lock catch is in running fit with the arc-shaped convex column, a gap can be formed, dust can enter the gap, the problems of adhesion and friction increasing and blocking caused by the influence of the dust can be avoided, and the friction is reduced by the arrangement of the convex ribs; the L utmost point moving contact adopts above-mentioned mode installation very convenient, and two arms of first torsional spring are very firm fixing on the mount pad in addition, and the rotation range of injecing the L utmost point moving contact that can be fine, and the L utmost point moving contact is inseparabler with the static contact when closing a floodgate simultaneously, can rotate in advance under the circumstances of heavy current, does benefit to quick separating brake.

The invention further provides that: the second end of connecting rod is contradicted on pressing spacing face after the circuit breaker combined floodgate, and the handle is less than 180 degrees to the thrust direction that the connecting rod second end produced and is pressed spacing contained angle between the thrust direction that produces towards the connecting rod second end this moment, and the face of contradicting on the conflict arm is L shape, and the below of face of contradicting is provided with makes things convenient for the connecting rod second end to slide into the flexion inclined plane, the bottom periphery of spout is provided with the recess.

By adopting the scheme, the second end of the connecting rod can move to the straight part of the chute under the action of the external force of the lock catch, so that the circuit breaker can be normally tripped; in addition, the arrangement of the abutting limiting surface increases the area, so that the abutting effect is better.

The present invention will be further described with reference to the following examples.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a cross-sectional view reflecting the first space and the second space in an embodiment of the present invention;

FIG. 3 is a perspective view of an embodiment of the present invention in a first space;

FIG. 4 is a perspective view of a frame in an embodiment of the present invention;

FIG. 5 is a perspective view of an upper cover according to an embodiment of the present invention;

FIG. 6 is a perspective view of a base according to an embodiment of the present invention;

FIG. 7 is a block diagram reflecting the first buffer and the second buffer according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of a reflective channel in accordance with an embodiment of the present invention;

fig. 9 is a perspective view showing the installation of the movable contact block, the lock catch and the L-pole movable contact according to the embodiment of the present invention;

FIG. 10 is a perspective view of a sliding slot on a movable contact block according to an embodiment of the present invention;

fig. 11 is a perspective view showing the installation of the moving contact and the moving contact base of the N-pole in the embodiment of the present invention;

FIG. 12 is a perspective view of a second stud of the movable contact block according to an embodiment of the present invention;

FIG. 13 is a perspective view showing the installation of the movable contact block and the lock catch in the embodiment of the present invention;

FIG. 14 is a perspective view of the movable contact block in cooperation with a connecting rod and a handle according to an embodiment of the present invention;

FIG. 15 is a mechanical schematic of FIG. 14;

fig. 16 is a perspective view of a movable contact according to an embodiment of the present invention;

fig. 17 is a cross-sectional view showing a mounting structure of a movable contact block according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1-17, a miniature circuit breaker includes a base 1, a middle seat 2, and an upper cover 3, wherein the middle seat 2 is located between the base 1 and the upper cover 3, a first space 11 is defined between the middle seat 2 and the base 1, a second space 12 is defined between the middle seat 2 and the upper cover 3, an N-pole contact device is disposed in the first space 11, an L-pole contact device, an arc extinguish chamber C, and a dual gold rod mechanism are disposed in the second space 12, a moving contact seat actuating mechanism E and a trip F are disposed above the middle seat 2, the moving contact seat actuating mechanism E includes a moving contact seat E1, a latch E2, a latch push rod mechanism, a connecting rod E7, and a handle E8, wherein a first end of the connecting rod E7 is movably disposed on the handle E8, a second end of the connecting rod E1, an L-pole moving contact E3 of the L-pole contact device and an N-pole moving contact E4 of the N-pole contact device are disposed on the moving contact seat E36, the movable contact seat E1 is provided with a convex column E14, the lock catch E2 is sleeved on the convex column E14 through a through hole E21 arranged on the lock catch E14, the lock catch push rod mechanism comprises a spring E61 and a push rod E62, the elastic force of the spring E61 acts on the push rod E62, the top end of the push rod E62 props against the lock catch E2, a sliding groove E111 is arranged above the movable contact seat E1, the sliding groove E111 comprises a bending part E1111 and a straight part E1112, the bending part E1111 of the chute E111 is bent upwards at one end close to the handle E8, the bending part E1111 and the straight part E1112 are arranged in a conducting way, the upper end of the lock catch E2 is provided with a contact arm E22, the contact arm E22 is provided with an abutting surface E23, the top end of a push rod E62 abuts against the side surface of the lock catch E2 after the breaker is disconnected, the abutting surface E23 of the lock catch E2 abuts against the chute bent part E1111 so as to lock the second end of the connecting rod E7 at the chute bent part E1111, and the second end of the connecting rod E7 is locked at the chute bent part E1111 and then can push the handle E8 to close the breaker; after the breaker is switched on, a release F of the breaker acts on the lock catch E2 to enable the lock catch E2 to rotate, then the collision surface E23 loses the locking of the second end of the connecting rod E7, and at the moment, the second end of the connecting rod E7 can slide into the straight part E1112 of the sliding groove to realize the switching-off of the breaker; an L-pole moving contact E3 is mounted on a convex column E14 on one side of a lock catch E2 mounted on the moving contact seat E1, a first side E11 is arranged on one side of the moving contact seat E1 on which the L-pole moving contact is mounted, a second convex column E15 is coaxially arranged with the convex column E14 on the other side of the moving contact seat E1, an N-pole moving contact E4 is mounted on the second convex column E15, a second side E12 is arranged on the side of the moving contact seat E1, through holes which are mutually communicated are arranged on the convex column E12 and the second convex column E12, a first convex column H12 is arranged on the base 1, a first shaft H12 is integrally arranged on the first convex column H12, a first annular groove H12 is arranged on the periphery of a joint part of the first shaft H12 and the first convex column H12, a second convex column H12 is arranged on the second convex column E12 and is sleeved on the second convex column 12 and integrally arranged on the second convex column 12, a second annular groove H33 is arranged at the periphery of a joint of the second shaft H31 and the second boss H31, the end portion of the rear convex column E14 sleeved with the convex column E14 abuts against the second annular groove H33, the width of the section of the first annular groove H13 is larger than the wall thickness of the second convex column E15, the width of the section of the second annular groove H33 is larger than the wall thickness of the convex column E14, the length of the first shaft H12 is larger than the length of the second shaft H32, the movable contact base E1 abuts against the second shaft H32 after the movable contact base E1 is mounted on the base 1 and the upper cover 3, and the abutting position is located in the convex column E14. By adopting the scheme, the second end of the connecting rod E7 is locked or unlocked in a new mode, and the switching-on or switching-off action of the circuit breaker is realized, so that the mode is convenient to install, stable in action and free of misoperation; crooked portion E1111 sets up to the kickup, and handle E7 is opposite with traditional circuit breaker in closing position and dropout position like this, satisfies different customers 'demand, and traditional circuit breaker can't realize reversing, and what above-mentioned scheme can be convenient in addition installs moving contact seat E1 on base 1 and upper cover 3, and foretell mounting means has multiple insurance efficiency, no matter be the projection or the axle breaks off, can not influence work, and the product still can continue to use, and it is also very convenient to install in addition.

In the embodiment of the present invention, a first arc guiding plate B1 and a second arc guiding plate B2 are disposed in the second space 12, wherein a stationary contact of an L-pole contact device is disposed on the first arc guiding plate B1, the first arc guiding plate B1 is bent downward below the stationary contact to form an arch portion B11, the second arc guiding plate B2 has a sloping side B21 inclined upward, an arc guiding region is formed between the arch portion B11 and the sloping side B21, partitions B3 which are staggered with each other are disposed on the middle seat 2 and the upper cover 3 and at the exhaust port of the arc extinguishing chamber C, the top ends of the partitions B3 on the middle seat 2 and the upper cover 3 are overlapped with each other to form a staggered exhaust through hole, a recessed region is disposed on the middle seat 2, the arc extinguishing chamber mounting region B5 and a buffer chamber B4 are respectively, the arc extinguishing chamber mounting region B38 and the buffer chamber B4 are separated by a staggered partition B3, and the buffer chamber B4 is disposed in the buffer chamber B4, the bottom edge and the side edge of the buffer chamber B4 are respectively provided with an exhaust through hole B42, and a channel B43 communicated with the circuit breaker wiring terminal accommodating cavity is arranged above the buffer chamber B4; the arc isolation plate B41 all sets up on well seat 2 and upper cover 3, it is even as an organic whole with baffle B3 on the well seat 2 to have at least two arc isolation plates B41 on the well seat 2, and the arc isolation plate B41 downwarping on the well seat 2 sets up, it is even as an organic whole with baffle B3 on the upper cover 3 to have at least two arc isolation plates B41 on the upper cover 3, and the arc isolation plate B41 downwarping on the upper cover 3 sets up, be provided with long protruding muscle B7 of bending shape respectively on well seat 2 and the upper cover 3 and the position that corresponds the run-on region, the setting direction of long protruding muscle B7 is roughly the same with the hypotenuse B21 direction of second run-on plate B2. By adopting the scheme, the space between the arc extinguish chamber mounting area B5 and the buffer chamber B4 is as large as possible, wherein the space between the arc extinguish chamber mounting area B5 is large, so that the arc extinguish chamber C is large, the arc extinguish effect is good, and the arc extinguish chamber is not easy to crack; the space of buffer chamber B4 is big, and buffering effect is better, and the reposition of redundant personnel electric arc that the flash barrier B41 in the buffer chamber B4 can be fine in addition prevents that the electric arc from reigniting, and the cooling electric arc produces gas, improves pressure, makes gaseous better discharge from the exhaust through hole.

In the embodiment of the present invention, a third arc ignition plate a1 and a fourth arc ignition plate a2 are disposed in the first space 11, a stationary contact of an N-pole contact device is disposed on the third arc ignition plate a1, an arching portion a11 is disposed below the stationary contact, the fourth arc ignition plate a2 includes a second inclined edge a21, the second inclined edge a21 and the arching portion a11 of the third arc ignition plate a1 are disposed opposite to each other to form an N-pole arc ignition region, a first buffer region A3 is disposed on the middle seat 2 below the second inclined edge a21, the N-pole arc ignition region and the first buffer region A3 are connected together, the first buffer region A3 is recessed, a through hole a31 communicating with the outside is disposed on the bottom edge of the first buffer region A3, a32 is disposed on the middle seat 2 and the base 1 and near the through hole a31, a foot portion of the middle seat 2 is disposed with a second buffer region a 84, and A5 is disposed on the middle seat A4, the bulge A5 and the base 1 are arranged at intervals to form a channel A6, and the channel A6 enables the first buffer area A3 and the second buffer area A4 to be arranged in a conducting way; base 1 is last and be located second buffer A4 position department and be provided with exhaust hole A41, and this exhaust hole A41 constitutes second buffer A4 and the external world switches on the setting, fourth run-on board A2 is including horizontal limit A22 and second hypotenuse A21, and wherein horizontal limit A22 realizes fixed mounting with protruding muscle or the card platform cooperation on well seat 2 and the base 1, be provided with long protruding muscle A7 corresponding to run-on district position on well seat 2 and the base 1, the direction of long protruding muscle A7 is integrative generally with second hypotenuse A21 direction. Adopt above-mentioned scheme, can make electric arc and gas get into first buffer A3 and second buffer A4, again because first buffer A3 becomes the indent setting, as far as possible set up first buffer A3 like this, make buffering effect better, be provided with the through-hole on the first buffer A3 in addition, high temperature gas can run out from the through-hole like this, baffle A32 can be fine blocks metal ion or metal particle and run out, prevent short circuit to ground, the setting of passageway A6 can make the gas of first buffer A3 run into in second buffer A4.

In the embodiment of the invention, a convex block E112 is arranged on the periphery of a straight portion E1112 of a sliding slot E111 of the movable contact seat E1, the convex block E112 is provided with an arc surface at a bent portion, the arc surface and the bent portion E1111 are connected to form an integral pressing limiting surface E1123 of a second end of a connecting rod E7, a positioning block E113 is arranged below the convex block E112, an arc-shaped convex column E114 is arranged around the circumference of the bottom of a convex column E14 at the first side of the movable contact seat E1, a convex rib E115 is arranged on a plane at the periphery of a convex column E14 at the first side of the movable contact seat E1, a mounting through hole E21 is arranged on the lock catch E2, a mounting through hole E21 of the lock catch E2 is sleeved on the convex column E14 at the first side and forms a rotating fit with the arc-shaped convex column E114, a movable contact E3 at the first side is sleeved on the convex column E14 and the side surface of the end of the arc-shaped convex column E114 or on the end of the arc-shaped convex column E16, a first, a stop E113 is arranged on the lower side of the projection E112, a limit groove E1122 is formed between the stop E1121 and the side surface of the first side E11 of the movable contact base E1, a first torsion spring E5 is arranged between the L-pole movable contact E3 and the movable contact base E1, the first torsion spring E5 is also sleeved on the convex column E14 of the first side E11, the first torsion arm of the first torsion spring E5 abuts against the limit groove E1122, the second torsion arm of the first torsion spring E5 abuts against the first bayonet E31 of the L-pole movable contact E3, the end wall of the second torsion arm of the first torsion spring E5 has a bending portion which is inserted into the concave cavity E16 below the first bayonet E31, a positioning piece E32 is arranged on the L-pole movable contact E3, the positioning piece E32 is positioned between the positioning block E113 of the movable contact base E1 and the limit groove E1122, the positioning piece E32 abuts against the positioning block E113 or the limit groove E3 to form a limit convex column E828653 of the movable contact base E, and a second side connecting column 15 is arranged above the second side E828653, a convex edge E1211 is arranged around the circumference of the connecting column E121, an abutting surface E12111 and an abutting boss E12112 are respectively arranged on the convex edge E1211, a third torsion spring E6 is sleeved on the connecting column E121, a first torsion arm of the third torsion spring E6 abuts against the abutting surface E12111, a second torsion arm of the third torsion spring E6 can abut against the abutting boss E12112, a second blocking piece E121121 is arranged below the abutting boss E12112, a positioning notch E121122 is formed between the second blocking piece E121121 and the side surface of the second side E12 of the movable contact seat E1, a second bayonet E42 is arranged on the N-pole movable contact E4, a second concave cavity E123 is arranged on the second side E12 of the movable contact seat E1 and corresponding to the second bayonet E42, the N-pole movable contact E4 is sleeved on the second convex column E moving contact E6866 of the second side E1, a second convex column E4684 is arranged between the N-pole E4 and the second torsion spring E1, and a second torsion spring E12 is also sleeved on the second convex column E12, the first torsion arm of the second torsion spring E7 abuts against the positioning notch E121122, the second torsion arm of the second torsion spring E7 abuts against the second bayonet E42 of the N-pole moving contact E4, the end of the second torsion arm of the second torsion spring E7 is bent and inserted into the second cavity E123, the second side E12 of the moving contact base E1 is provided with the positioning protrusion E122, the N-pole moving contact E4 is provided with the N-pole limiting piece E41 between the positioning protrusion E122 and the positioning notch E121122, and the abutting of the N-pole limiting piece E41 and the positioning protrusion E122 or the positioning notch E121122 constitutes the limiting of the rotation angle of the N-pole moving contact E4. By adopting the scheme, the lock catch E2 is in running fit with the arc-shaped convex column E114, a gap can be formed, dust can enter the gap, the problems of adhesion and friction increasing and blocking due to the influence of the dust can be avoided, and the arrangement of the convex rib E115 is to reduce the friction; the L pole moving contact E3 is very convenient to mount by adopting the mode, in addition, two arms of the first torsion spring E5 are very firmly fixed on the mounting seat, the rotating range of the L pole moving contact E3 can be well limited, meanwhile, the L pole moving contact E3 is tighter with a static contact when the switch is switched on, and can rotate in advance under the condition of large current, so that the rapid switch-off is facilitated.

In the embodiment of the invention, after the circuit breaker is switched on, the second end of the connecting rod E7 abuts against the abutting limiting surface E1123, at this time, an included angle K between a thrust direction F1 generated by the handle E8 to the second end of the connecting rod E7 and a thrust direction F2 generated by the abutting limiting surface E1123 to the second end of the connecting rod E7 is less than 180 degrees, the abutting surface E23 on the abutting arm E22 is L-shaped, a slope E24 facilitating the sliding of the second end of the connecting rod E7 into the bending part is arranged below the abutting surface E23, and the periphery of the bottom of the sliding groove E111 is provided with a groove E1113; adopt above-mentioned scheme, guarantee hasp E2 under the exogenic action, connecting rod E7 second end can remove to straight portion E1111 of spout to realize that the circuit breaker can normally trip.