CN211605072U - Operating mechanism and circuit breaker with same - Google Patents

Abstract

The utility model provides an operating device and have its circuit breaker belongs to circuit breaker technical field, operating device, include: the contact comprises a contact support, a lock catch and a jump buckle, wherein the lock catch is provided with a double-gold matching end extending towards the direction of a double-gold protection device of the electric switch device and an electromagnetic matching end extending towards the direction of a short-circuit protection device of the electric switch device; the utility model discloses an operating device, the rotation route of hasp can satisfy simultaneously respectively with two gold protection device and short-circuit protection device's cooperation linkage to can intervene operating device through two gold protection device and short-circuit protection device.

Description

Operating mechanism and circuit breaker with same

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to operating device and have its circuit breaker.

Background

The breaker is a switching device capable of bearing and breaking current under abnormal loop conditions within a specified time, and is provided with a movable contact and a fixed contact which can perform on-off operation inside, wherein the movable contact is driven by an operating mechanism.

The operating mechanism of the circuit breaker is operated through a button extending out of the shell, a moving contact in the circuit breaker is driven to be in contact with or disconnected from a static contact through multi-stage linkage, and when the moving contact is in contact with the static contact, power can be supplied to a load connected with the circuit breaker.

However, an overload protection device and a short-circuit protection device are also required to be arranged in the circuit breaker, and both the overload protection device and the short-circuit protection device need to be connected with the operating mechanism, so that the arrangement of the operating mechanism needs to be considered in many ways.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides an operating device for the contact and the disconnection of moving contact and static contact among the switching electric switching device, and can cooperate the linkage with two golden protection devices and short-circuit protection device respectively in electric switching device.

The utility model also provides a circuit breaker of having above-mentioned operating device.

The utility model provides an operating device, include: the contact support is suitable for being rotatably connected into a shell of the electric switch device through a first rotating shaft, one end of the contact support is rotatably connected with a moving contact, a contact return spring is connected between the moving contact and the contact support, and the contact return spring has a biasing force which enables the moving contact to rotate towards the direction of contacting with the fixed contact;

the lock catch is rotationally connected to the contact support piece through a second rotating shaft, the lock catch is provided with a clamping groove for inserting the contact support piece, a lock catch return spring is connected between the lock catch and the contact support piece, and the lock catch return spring is provided with a biasing force for enabling the lock catch to be in a direction of releasing the upward pushing of the contact support piece;

the lock catch is provided with a double-gold mating end extending towards the direction of the double-gold protection device of the electric switch device, an electromagnetic mating end extending towards the direction of the short-circuit protection device of the electric switch device and a locking mating end towards the locking structure of the electric switch device;

the jump buckle is rotationally connected to the contact support piece and is provided with a hook structure used for locking with the lock catch; the jump buckle is suitable for being connected with a front end driving piece through a connecting rod, and the front end driving piece is connected with a button extending out of a shell of the electric switch device.

The utility model provides a circuit breaker, which comprises a housin, be provided with in the above-mentioned scheme in the casing operating device, still include:

an electromagnetic trip, which is arranged between a first incoming line terminal and an operating mechanism in a shell of the circuit breaker and is provided with a magnetic yoke, a coil and an armature which can be driven; the electromagnetic mating end on the lock catch of the operating mechanism is provided with an intersection region in a moving region in a shell of the circuit breaker and a moving region of the armature;

the bimetallic protection device is arranged on one side of the operating mechanism and is provided with a bimetallic strip capable of deforming and moving; the bimetallic mating end on the lock catch of the operating mechanism is provided with an intersection area in a moving area in the shell of the circuit breaker and a moving area of the bimetallic strip;

a locking structure having a locking member rotatably disposed in the housing, the locking member having an unlocking actuation end extending toward the operating mechanism; the locking mating end on the lock catch of the operating mechanism has an intersection area in a moving area in the shell of the circuit breaker and a moving area of the unlocking execution end of the locking piece.

Preferably, one end of the wire on the coil of the electromagnetic release is directly connected to the first incoming line terminal.

As a preferred scheme, the bimetallic strips of the bimetallic strip protection device are arranged in a non-straight strip manner, and the bimetallic strips are positioned between the outlet terminal and the arc-extinguishing chamber in the shell of the circuit breaker.

As an optimal scheme, the connecting end of the bimetallic strip is connected with the fixed contact, one end of the fixed contact, which is connected with the bimetallic strip, is provided with a deformation section, the deformation section is in a bent shape, and the thickness of the deformation section is smaller than the average thickness of the fixed contact.

Preferably, the method further comprises the following steps: the front end driving piece is rotatably arranged in the shell, one end of the front end driving piece is connected with a button extending out of the shell of the electric switch device through a first connecting rod, and the other end of the front end driving piece is in linkage connection with the jump buckle through a second connecting rod;

and a support return spring connecting the contact support and the housing, and having a biasing force for rotating the contact support toward a return position for releasing the contact between the moving contact and the stationary contact.

Preferably, the locking structure includes:

the locking piece is rotatably arranged in the shell of the circuit breaker and is provided with a locking end and an unlocking execution end; when the locking end extends out of the shell of the circuit breaker, the locking piece is in a locking position, and at the moment, the unlocking execution end is blocked on an execution path of the first connecting rod passing through the front end driving piece;

a lock return elastic member connecting the locking member and the housing and having a biasing force for keeping the locking end of the locking member extended out of the housing;

when the operating mechanism performs opening operation, the unlocking execution end of the locking piece is driven, so that the locking end of the locking piece retracts into the shell of the circuit breaker.

Preferably, the locking piece is further provided with a driving end, and when the locking end of the locking piece is driven to retract towards the shell of the circuit breaker, the driving end of the locking piece is suitable for being in contact with the lock catch, so that the lock catch can be driven to perform unhooking.

Preferably, the method further comprises the following steps: the stopping piece is rotatably arranged in the shell of the circuit breaker and is provided with a stopping end with one end facing the lock catch and an unlocking end suitable for extending out of the shell of the circuit breaker; when the unlocking end extends out of the shell of the circuit breaker, the stop piece is located at a stop position, and at the moment, the stop end of the stop piece is blocked on an execution path of the lock catch;

the lock return spring is connected to the stop and has a biasing force that maintains the stop in the stop position.

Preferably, the method further comprises the following steps: the circuit breaker comprises a circuit breaker and a partition plate, wherein the circuit breaker is arranged in a shell of the circuit breaker, an arc extinguish chamber for arranging an arc extinguish chamber is arranged on the front side of the circuit breaker, an accommodating groove suitable for accommodating a conductive plate is arranged between the back side of the circuit breaker and the shell of the circuit breaker, one end of the accommodating groove is provided with an inlet suitable for the conductive plate to penetrate in, and the other end of the accommodating groove is provided with an outlet;

the current conducting plate, for being suitable for paste lean on at the casing of circuit breaker with flat structure between the back of baffle, the one end and the second incoming line terminal of current conducting plate are connected, and the other end is connected with a terminal that goes out, the current conducting plate is integrated into one piece, integrated into one piece between current conducting plate and second incoming line terminal and/or the terminal appears.

The utility model discloses technical scheme has following advantage:

1. the utility model provides an operating mechanism, contact support piece rotate connect in the casing of the electric switching device through the first pivot, drive the moving contact to be close to or keep away from towards the direction of static contact through the rotation of contact support piece, thus carry on the contact and disconnection of moving contact and static contact;

the lock catch is provided with a clamping groove for inserting the contact support piece, and the lock catch and the contact support piece can be linked through the clamping groove; the lock catch is also provided with a bimetal matching end extending towards the bimetal protection device direction of the electric switch device and an electromagnetic matching end extending towards the short circuit protection device direction of the electric switch device, and is rotatably connected with the contact support piece through a second rotating shaft, and the second rotating shaft and the first rotating shaft are different rotating shafts, so that the rotating path of the lock catch can simultaneously meet the matching linkage with the bimetal protection device and the short circuit protection device respectively, and the operating mechanism can be interfered by the bimetal protection device and the short circuit protection device; in addition, the catch has a locking counter-end for facing a locking structure of the electrical switching device, so that the actuating mechanism can be intervened by the locking structure

The jump buckle is used for pushing the lock buckle to make the lock buckle bring the contact support piece to rotate, and then make the movable contact be close to towards the direction of static contact, and the hook structure on the jump buckle is used for cooperating the locking with the lock buckle.

2. The utility model provides a circuit breaker has above-mentioned operating device, still has electromagnetic trip, two golden protection devices and locking structure simultaneously, and wherein, electromagnetic trip and two golden protection devices are used for interfering operating device, make it carry out the separating brake, and locking structure still is used for interfering operating device simultaneously, makes it stopped to close a floodgate.

3. The utility model provides a circuit breaker, bimetallic strip of two golden protection devices is the non-straight strip and arranges, and this arrangement structure can save space layout in the circuit breaker, is favorable to the miniaturization of circuit breaker; the bimetallic protection device is used for carrying out overload protection on a circuit, can intervene a lock catch of an operating mechanism through the deformability of the bimetallic strip, and drives the lock catch under the abnormal condition of the circuit breaker so that the contact support part can drive the moving contact to be separated from the static contact; the electromagnetic tripping device is used for carrying out short-circuit protection on a circuit, the lock catch of the operating mechanism can be interfered through the driven armature, and under the abnormal condition of the circuit breaker, the lock catch is driven, so that the contact support piece can drive the moving contact to be separated from the static contact.

4. The utility model provides a circuit breaker has the deformation section on the quiet contact, and this deformation section is connected with the bimetallic strip and is used for the regulation to bimetallic strip angular position, and this deformation section is for bending the shape to the thickness of deformation section is less than the average thickness of static contact, and the bimetallic strip that makes can be more light when carrying out angular position regulation.

5. The utility model provides a circuit breaker, the locking piece has, the locking piece rotates and sets up in the casing of circuit breaker, when the locking end of locking piece stretches out the casing of circuit breaker outside, can lock the circuit breaker in the cabinet body, when the locking end withdrawal circuit breaker of locking piece needs, need rotate towards the position of separating brake through the drive front end driving piece, the unblock execution end of the first link pulling locking piece of connecting on the driving piece of through the front end, thereby drive the locking piece and rotate, make the locking end withdrawal circuit breaker of locking piece, thereby can avoid forgetting the separating brake and remove the locking of circuit breaker and the cabinet body, it takes place to avoid taking out the circuit breaker with electricity.

6. The utility model provides a circuit breaker still has the drive end on the locking piece, when the in-process with the circuit breaker inserted the rack, the locking end of locking piece is by the internal withdrawal of rack drive orientation circuit breaker's casing, at this moment, if operating device is in when closing the floodgate position, the drive end of locking piece can with operating device's hasp contact, thereby can drive the hasp execution unhook to can avoid installing the circuit breaker is electrified.

7. The utility model provides a circuit breaker has the retainer, rotates to set up in the casing of circuit breaker, has locking end and unblock end, outside the unblock end was suitable for the casing that stretches out the circuit breaker, when the unblock end stretches out the casing external, the locking end blocks on the execution route of operating device's hasp to prevent the hasp towards the switching-on position and rotate, only when the circuit breaker assembly targets in place, the rack can push away the retainer to the casing of circuit breaker in, thereby can avoid closing a floodgate when the circuit breaker assembly does not target in place, guarantee safety.

8. The utility model provides a circuit breaker has baffle and current conducting plate, and the baffle setting has the holding tank that is used for holding the current conducting plate in the casing between the back of baffle and casing, and the current conducting plate is flat structure, and the front of baffle is formed with the explosion chamber, and above-mentioned structure can be guaranteed to make the explosion chamber have great size, improves the arc extinguishing effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of an embodiment of an operating mechanism according to the present invention.

Fig. 2 is a schematic perspective view of the operating mechanism of fig. 1 at another angle.

Fig. 3 is a schematic perspective view of an embodiment of the operating mechanism of fig. 1 within a circuit breaker.

Fig. 4 is a schematic perspective view of fig. 3 at another angle.

Fig. 5 is a schematic perspective view of a specific embodiment of the circuit breaker of the present invention.

Fig. 6 is an enlarged view of the area a in fig. 5.

Fig. 7 is a schematic perspective view of the stationary contact in fig. 5.

Fig. 8 is a front view of fig. 5.

Fig. 9 is a perspective view of the locking member of fig. 8.

Fig. 10 is a schematic perspective view of the circuit breaker of fig. 5 at another angle.

Fig. 11 is an enlarged view of the region B in fig. 10.

Fig. 12 is a schematic perspective view of the locking member of fig. 10 after actuation.

Fig. 13 is an enlarged view of the region C in fig. 12.

Fig. 14 is a perspective view of the stopper of fig. 12.

Fig. 15 is a schematic perspective view of the stopper of fig. 14 on the rear surface of the circuit breaker.

Fig. 16 is an enlarged view of region D in fig. 15.

Fig. 17 is a schematic perspective view of the stopper of fig. 15 after operation.

Fig. 18 is an enlarged view of region E in fig. 17.

Fig. 19 is a front view of an electromagnetic trip and arc extinguishing system within a circuit breaker.

Fig. 20 is a perspective view of the electromagnetic release.

Fig. 21 is a schematic perspective view of an arc extinguishing system.

Fig. 22 is a rear perspective view of a spacer in an arc extinguishing system.

Fig. 23 is a schematic perspective view of the conductive plate on the back surface of the separator in fig. 22.

Description of reference numerals:

1. a contact support; 2. locking; 3. jumping and buckling; 4. a first rotating shaft; 5. a moving contact; 6. a second rotating shaft; 7. an upper transverse column; 8. a lower cross post; 9. a latch return spring; 10. a double-gold matching end; 11. an electromagnetic mating end; 12. a locking mating end; 13. a hook structure; 14. a front end drive member; 15. a support member return spring; 16. a first link; 17. a button; 18. a second link; 19. a bimetal; 20. an outlet terminal; 21. an arc extinguishing chamber; 22. static contact; 23. a deformation section; 24. a locking member; 25. locking the return elastic member; 26. a locking end; 27. unlocking the execution end; 28. a driving end; 29. a housing; 30. a stopper; 31. a stopping end; 32. an unlocking end; 33. a magnetic yoke; 34. a coil; 35. an armature; 36. a first incoming terminal; 37. an extension plate; 38. a partition plate; 39. a conductive plate; 40. a second incoming terminal.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The present embodiment provides a circuit breaker, which has an operating mechanism inside, and the operating mechanism is used for making and breaking the movable contact 5 and the fixed contact 22 inside the circuit breaker.

As shown in fig. 1 and 2, the operating mechanism includes: contact support 1, latch 2 and jumper 3. The contact support 1 is adapted to be rotatably connected in a housing 29 of the circuit breaker by a first rotating shaft 4, one end of the contact support 1 is rotatably connected with a movable contact 5, a contact return spring is connected between the movable contact 5 and the contact support 1, and the contact return spring has a biasing force for rotating the movable contact 5 toward a direction of contacting with a fixed contact 22, and the biasing force provides a force for rotating the movable contact 5 upward as shown in fig. 1.

As shown in fig. 1 and 2, the latch 2 is rotatably connected to the contact support 1 through a second rotating shaft 6, the latch 2 has a slot into which the contact support 1 is inserted, the slot is a space structure formed between an upper cross column 7 and a lower cross column 8 of the latch 2, and the contact support 1 is inserted between the upper cross column 7 and the lower cross column 8; a latch 2 return spring is connected between the latch 2 and the contact support 1, and the latch 2 return spring has a biasing force that causes the latch 2 to be pushed upward to the contact support 1, and the biasing force provides a force that causes the latch 2 to rotate in a clockwise direction about the second rotating shaft 6 as shown in fig. 2; the latch 2 has a bimetal mating end 10 extending towards the bimetal protection device of the circuit breaker, an electromagnetic mating end 11 extending towards the short circuit protection device of the circuit breaker, and a locking mating end 12 extending towards the locking structure of the circuit breaker.

As shown in fig. 1 and 2, the trip catch 3 is rotatably connected to the contact support 1, the trip catch 3 is provided with a hook structure 13 for pushing the latch 2 to rotate, and when a closing operation is performed, the trip catch 3 is driven to rotate and then drives the latch 2 through the hook structure 13, thereby finally achieving the closing operation.

As shown in fig. 3 and 4, the operating mechanism further includes: a front end driver 14 and a support return spring 15. The front end driving part 14 is rotatably arranged in the shell 29, one end of the front end driving part 14 is connected with a button 17 extending out of the shell 29 of the circuit breaker through a first connecting rod 16, and the other end of the front end driving part 14 is connected with the trip buckle 3 through a second connecting rod 18, so that the button 17, the front end driving part 14 and the trip buckle 3 are linked; the support return spring 15 connects the contact support 1 and the housing 29, and the support return spring 15 has a biasing force that rotates the contact support 1 toward a return position in which the contact between the moving contact 5 and the stationary contact 22 is released, the biasing force providing a force that rotates the contact support 1 in a clockwise direction about the first rotation axis 4, as shown in fig. 4.

As shown in fig. 5, 6, and 7, the circuit breaker provided in this embodiment further includes: the bimetallic strip circuit breaker comprises a bimetallic strip protection device and a fixed contact 22, wherein the bimetallic strip protection device is provided with a bimetallic strip 19 which is arranged in a non-straight strip manner, and the bimetallic strip 19 is arranged at one side of the operating mechanism and is positioned between an outlet terminal 20 and an arc extinguishing cover 21 in a circuit breaker shell 29; the static contact 22 is connected with the connecting end of the bimetallic strip 19 through a deformation section 23, the deformation section 23 is in a bent shape, and the thickness of the deformation section 23 is smaller than the average thickness of the static contact 22.

As shown in fig. 8, the circuit breaker provided in this embodiment further includes: a locking member 24 and a locking return spring 25. The locking member 24 is rotatably provided in a case 29 of the circuit breaker, and a locking position for locking the position of the circuit breaker is provided in the case 29. The lock return elastic member 25 connects the lock member 24 and the housing 29, and the lock return elastic member 25 has a biasing force that keeps the lock member 24 in the lock position.

As shown in fig. 9, the locking member 24 has a locking end 26, an unlocking actuation end 27, and a driving end 28. When the locking member 24 is in the locking position, as shown in fig. 10 and 11, the locking end 26 can extend out of the housing 29 of the circuit breaker, and at this time, the unlocking performing end 27 extends into the housing 29, the first link 16 passing through the front end driving member 14 moves along a performing path during the opening operation, and the unlocking performing end 27 is blocked on the performing path when extending into the housing 29. When the circuit breaker needs to be pulled out of the cabinet, in order to unlock the locking piece 24 from the housing 29, the operating mechanism needs to be used to drive the locking piece 24, specifically, as shown in fig. 12 and 13, the unlocking executing end 27 of the locking piece 24 needs to be driven through the front end driving piece 14 and the first connecting rod 16, so that the locking end 26 of the locking piece 24 is retracted into the housing 29 of the circuit breaker, and when the front end driving piece 14 and the first connecting rod 16 drive the locking piece 24, the operating mechanism is driven to perform opening operation, so that the end of the circuit breaker is pulled out after being powered.

As shown in fig. 12 and 13, when the circuit breaker is inserted into the cabinet, the locking end 26 of the locking member 24 is driven by the cabinet to retract toward the housing 29 of the circuit breaker, and at this time, if the latch 2 of the operating mechanism is in the closing position, the driving end 28 of the locking member 24 can contact with the locking mating end 12 of the latch 2, so as to drive the latch 2 to perform unhooking, thereby ensuring the power failure of the circuit breaker.

As shown in fig. 8 and 14, the circuit breaker provided in this embodiment further includes: a stopper 30. The stop member 30 is rotatably arranged in the shell 29 of the circuit breaker and is provided with a stop end 31 with one end facing the latch 2 and an unlocking end 32 suitable for extending out of the shell 29 of the circuit breaker; when the unlocking end 32 extends out of the shell 29 of the circuit breaker, the stop piece 30 is located at a stop position, and the stop end 31 of the stop piece 30 is blocked on the execution path of the latch 2; the stopper 30 is connected to the locking member 24 and the housing 29 by a lock return elastic member 25, respectively, and the lock return elastic member 25 has a biasing force that keeps the stopper 30 at the stopper position.

As shown in fig. 15 and 16, when the circuit breaker is in an uninstalled state or a state where the circuit breaker is not installed in place in the cabinet, at this time, the stopper 30 is located at the stopping position, the unlocking end 32 of the stopper 30 extends out of the housing 29 of the circuit breaker, the hooking rib of the stopping end 31 blocks the execution path of the mating rib of the mating operation end of the latch 2, and when the latch 2 rotates, the hooking rib and the mating rib abut against each other, so that the latch 2 cannot rotate any more, the movable contact 5 and the fixed contact 22 cannot contact each other, and the circuit breaker is always in a power-off state.

As shown in fig. 17 and 18, when the circuit breaker is installed in the cabinet and installed in place, the stopper 30 is driven by an external force to rotate against the biasing force of the locking return elastic member 25, and the unlocking end 32 is driven to retract into the housing 29 of the circuit breaker, and the stopper 30 is located at a position for releasing the stopper and does not affect the closing of the circuit breaker.

As shown in fig. 19 and 20, the circuit breaker provided in this embodiment further includes: an electromagnetic trip, which is arranged between a first line terminal 36 in the housing 29 of the circuit breaker and the operating mechanism, has a yoke 33, a coil 34 and an armature 35 that can be driven, one end of the coil 34 being connected directly to the first line terminal 36, the end of the first line terminal 36 having an extension plate 37 for connection to the coil 34.

As shown in fig. 21 and 22, the circuit breaker provided in this embodiment further includes: a partition plate 38 and a conductive plate 39, the partition plate 38 is arranged in the housing 29 of the circuit breaker, the front surface is provided with an arc extinguishing chamber for arranging an arc extinguishing chamber, a containing groove suitable for containing the conductive plate 39 is arranged between the back surface and the housing 29 of the circuit breaker, one end of the containing groove is provided with an inlet suitable for the conductive plate 39 to penetrate, and the other end of the containing groove is provided with an outlet suitable for the conductive plate 39 to penetrate.

As shown in fig. 23, the conductive plate 39 is a flat structure adapted to be abutted between the housing 29 of the circuit breaker and the back surface of the partition 38, one end of the conductive plate 39 is connected to the second incoming terminal 40, the other end is connected to an outgoing terminal 20, and the conductive plate 39 is integrally formed; in addition, as an alternative embodiment, conductive plate 39 may be integrally formed with second inlet terminal 40 and/or outlet terminal, i.e., there may be at most one weld between second inlet terminal 40, conductive plate 39 and outlet terminal 20.

Method of use and principles

The circuit breaker of this embodiment is when inserting the rack operation: as shown in fig. 5, first, the locking end 26 of the locking member 24 protrudes downward outside the housing 29 under the action of the locking return elastic member 25, and during the insertion of the circuit breaker into the cabinet, when the locking end 26 of the locking member 24 is driven to retract into the housing 29, if the operating mechanism is in the closing position, the unlocking driving end 28 of the locking member 24 will contact with the locking mating end 12 of the latch 2, so as to toggle the latch 2 towards the unlocking direction, so that the operating mechanism performs the opening operation, thereby ensuring that the inside of the circuit breaker is in the opening state when the circuit breaker is inserted. As shown in fig. 15, when the circuit breaker is inserted into the cabinet and is not in place, the unlocking end 32 of the stopper 30 protrudes downward outside the housing 29 by the lock return elastic member 25, and the stopping end 31 of the stopper 30 protrudes inside the housing 29 to the execution path of the lock mating end 12 of the latch 2 of the operating mechanism, at which position the latch 2 cannot perform rotation at the time of closing, and thus the operating mechanism cannot perform closing operation, and therefore the risk of closing due to the circuit breaker being not assembled in place can be avoided. In addition, as shown in fig. 12, when the circuit breaker is inserted into the cabinet out of position, the locking end 26 of the locking member 24 cannot protrude downward out of the housing 29, and at this time, the unlocking driving end 28 of the locking member 24 is juxtaposed with the stopping end 31 of the stopper 30 and is also blocked on the execution path of the locking mating end 12 of the latch 2 to prevent the closing operation of the operating mechanism together.

The circuit breaker of this embodiment is when carrying out closing operation: as shown in fig. 5, when the push button 17 is pushed toward the inside of the case 29 of the circuit breaker, the push button 17 rotates the front end driver 14 via the first link 16, and the end of the first link 16 inserted into the front end driver 14 leaves the moving path of the unlocking performing end 27 of the locking member 24, so that the locking member 24 can rotate downward to extend the locking end 26 out of the case 29; under the drive of the front end driving part 14, the second connecting rod 18 drives the jump buckle 3 to rotate, the jump buckle 3 drives the lock catch 2 to rotate through the hooking structure 13, when the jump buckle 3 and the lock catch 2 rotate relatively to a dead point position, the lock catch 2 is locked, at the moment, the locking matching end 12 of the lock catch 2 rotates downwards to be opposite to the driving end 28 of the locking part 24, the electromagnetic matching end 11 of the lock catch 2 rotates forwards to be opposite to the armature 35 of the electromagnetic release, and the bimetal matching end 10 of the lock catch 2 rotates upwards to be opposite to the bimetallic strip 19; when the latch 2 rotates, the contact support member 1 rotates upward around the first rotating shaft 4 under the driving of the latch 2, the movable contact 5 moves upward toward the fixed contact 22 under the driving of the contact support member 1 until contacting the fixed contact 22, and keeps close contact with the fixed contact 22 under the action of the contact return spring, so that the circuit breaker is switched on.

The circuit breaker of this embodiment is when carrying out overload protection: as shown in fig. 5, when the circuit breaker is in operation, if an overload occurs in a circuit, the current passing through the bimetal 19 increases at this time, so that the bimetal 19 is heated and deformed, the free end of the bimetal 19 moves downward and then contacts with the bimetal mating end 10 of the latch 2, thereby pushing the latch 2 to rotate towards the opening direction, the latch 2 overcomes the locking of the trip buckle 3 and then rotates towards the clockwise direction under the action of the reset spring of the latch 2, and then the contact support member 1 is driven to rotate towards the clockwise opening direction, thereby driving the moving contact 5 to be disconnected from the static contact 22, and realizing the overload protection.

The circuit breaker of this embodiment is when carrying out short-circuit protection: as shown in fig. 5, when the circuit breaker is in operation, if a short circuit occurs in the circuit, the current passing through the coil 34 of the electromagnetic release is instantly increased, so that the magnetic field for driving the armature 35 is increased, and then the armature 35 can be driven to move towards the direction close to the latch 2, so that the end of the armature 35 is pushed against the electromagnetic mating end 11 of the latch 2, and the latch 2 rotates towards the direction of opening, and after overcoming the locking of the trip 3, the latch 2 rotates towards the clockwise direction under the action of the reset spring of the latch 2, and then drives the contact support 1 to rotate towards the clockwise opening direction, so as to drive the moving contact 5 to be disconnected from the static contact 22, thereby implementing short circuit protection.

The circuit breaker of this embodiment is when pulling out the rack operation: as shown in fig. 5, the circuit breaker needs to be opened first, and the specific operation steps are as follows: the button 17 is pulled towards the outside of a shell 29 of the circuit breaker, the button 17 drives a front end driving part 14 to rotate through a first connecting rod 16, the front end driving part 14 drives a jump buckle 3 to rotate through a second connecting rod 18, the jump buckle 3 is unlocked to lock a lock catch 2, the lock catch 2 can rotate towards the direction of opening the switch, the lock catch 2 rotates downwards under the action of a reset spring of the lock catch 2, meanwhile, a contact support part 1 rotates towards the direction of opening the switch under the action of a reset spring 15 of the support part, and a movable contact 5 is separated from a static contact 22, so that the switch is opened.

In the above operation, when the first link 16 rotates the front end driver 14, the end of the first link 16 inserted into the front end driver 14 engages with the unlocking performing end 27 of the locking member 24, and the locking end 26 of the locking member 24 is pulled back into the housing 29, so that the circuit breaker is unlocked from the cabinet, and the circuit breaker can be pulled out of the cabinet.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. An operating mechanism, comprising:

the contact device comprises a contact support (1) and a first rotating shaft (4), wherein the contact support (1) is suitable for being rotatably connected into a shell (29) of the electric switching device through the first rotating shaft (4), one end of the contact support (1) is rotatably connected with a movable contact (5), a contact return spring is connected between the movable contact (5) and the contact support (1), and the contact return spring has a biasing force which enables the movable contact (5) to rotate towards the direction of contacting with a static contact (22);

the lock catch (2) is rotatably connected to the contact support piece (1) through a second rotating shaft (6), the lock catch (2) is provided with a clamping groove for inserting the contact support piece (1), a lock catch (2) return spring is connected between the lock catch (2) and the contact support piece (1), and the lock catch (2) return spring has a biasing force for enabling the lock catch (2) to face to the direction of releasing the upward pushing of the contact support piece (1);

the lock catch (2) is provided with a double-gold mating end (10) extending towards the direction of a double-gold protection device of the electric switch device, an electromagnetic mating end (11) extending towards the direction of a short-circuit protection device of the electric switch device, and a locking mating end (12) facing towards a locking structure of the electric switch device;

the jump buckle (3) is rotationally connected to the contact support piece (1) and is provided with a hook structure (13) used for locking the lock catch (2); the jump button (3) is suitable for being connected with a front end driving piece (14) through a connecting rod, and the front end driving piece (14) is connected with a button (17) extending out of a shell (29) of the electric switch device.

2. Circuit breaker, characterized in that it comprises a casing (29), inside said casing (29) there is provided an operating mechanism as claimed in claim 1, further comprising:

an electromagnetic trip, which is arranged between a first line terminal (36) in a housing (29) of the circuit breaker and the operating mechanism, and which has a yoke (33), a coil (34) and an armature (35) that can be driven; the moving area of the electromagnetic mating end (11) on the lock catch (2) of the operating mechanism in the shell (29) of the circuit breaker and the moving area of the armature (35) have an intersection area;

a bimetal protector provided on one side of the operating mechanism and having a bimetal (19) capable of deforming and moving; the moving area of the bimetallic mating end (10) on the lock catch (2) of the operating mechanism in the shell (29) of the circuit breaker and the moving area of the bimetallic strip (19) have an intersection area;

a locking structure having a locking member (24) rotatably disposed in a housing (29), the locking member (24) having an unlocking actuation end (27) extending toward the operating mechanism; the movement area of the locking mating end (12) on the latch (2) of the operating mechanism in the housing (29) of the circuit breaker and the movement area of the unlocking actuating end (27) of the locking element (24) have an intersection region.

3. The circuit breaker according to claim 2, characterized in that one end of the wire on the coil (34) of the electromagnetic trip is directly connected to the first inlet terminal (36).

4. A circuit breaker according to claim 2 wherein the bimetal (19) of the bimetal protection device is arranged in a non-straight strip, the bimetal (19) being located between the outlet terminal (20) and the arc chute (21) in the housing (29) of the circuit breaker.

5. The circuit breaker according to claim 4, wherein the connecting end of the bimetal strip (19) is connected with a fixed contact (22), one end of the fixed contact (22) connected with the bimetal strip (19) is provided with a deformation section (23), the deformation section (23) is in a bent shape, and the thickness of the deformation section (23) is smaller than the average thickness of the fixed contact (22).

6. The circuit breaker of claim 2, further comprising:

the front end driving piece (14) is rotatably arranged in the shell (29), one end of the front end driving piece is connected with a button (17) extending out of the shell (29) of the electric switch device through a first connecting rod (16), and the other end of the front end driving piece is in linkage connection with the jump buckle (3) through a second connecting rod (18);

and a support return spring (15) which connects the contact support (1) and the housing (29) and has a biasing force for rotating the contact support (1) toward a return position for releasing the contact between the moving contact (5) and the stationary contact (22).

7. The circuit breaker of claim 6, wherein the locking structure comprises:

a locking member (24) rotatably disposed in a housing (29) of the circuit breaker and having a locking end (26) and an unlocking performing end (27); when the locking end (26) extends out of the casing (29) of the circuit breaker, the locking piece (24) is in a locking position, and the unlocking execution end (27) is blocked on an execution path of the first connecting rod (16) passing through the front end driving piece (14);

a lock return elastic member (25) connecting the lock member (24) and the housing (29) and having a biasing force for keeping the lock end (26) of the lock member (24) outside the housing (29);

when the operating mechanism performs opening operation, the unlocking execution end (27) of the locking piece (24) is driven to retract the locking end (26) of the locking piece (24) into the shell (29) of the circuit breaker.

8. The circuit breaker according to claim 7, characterized in that the locking member (24) further has a driving end (28) thereon, and when the locking end (26) of the locking member (24) is driven to retract towards the inside of the circuit breaker housing (29), the driving end (28) of the locking member (24) is adapted to contact the latch (2) so as to be able to drive the latch (2) to perform unhooking.

9. The circuit breaker according to any one of claims 7 or 8, further comprising:

a stopper (30) rotatably disposed in the case (29) of the circuit breaker, having a stopper end (31) having one end directed toward the latch (2) and an unlocking end (32) adapted to protrude outside the case (29) of the circuit breaker; when the unlocking end (32) extends out of a shell (29) of the circuit breaker, the stop piece (30) is located at a stop position, and the stop end (31) of the stop piece (30) is blocked on an execution path of the latch (2);

the lock return spring (25) is connected to the stopper (30) and has a biasing force that holds the stopper (30) in the stopper position.

10. The circuit breaker according to any one of claims 2-8, further comprising:

the circuit breaker comprises a partition plate (38) arranged in a shell (29) of the circuit breaker, wherein the front side of the partition plate is provided with an arc extinguishing chamber for arranging an arc extinguishing chamber, a containing groove suitable for containing a conducting plate (39) is arranged between the back side of the partition plate and the shell (29) of the circuit breaker, one end of the containing groove is provided with an inlet suitable for the conducting plate (39) to penetrate in, and the other end of the containing groove is provided with an outlet suitable for the conducting plate (39) to penetrate out;

the circuit breaker comprises a conductive plate (39), a shell (29) and a flat structure, wherein the conductive plate (39) is suitable for being attached to the circuit breaker and the flat structure is arranged between the back faces of partition plates (38), one end of the conductive plate (39) is connected with a second incoming line terminal (40), the other end of the conductive plate is connected with an outgoing line terminal (20), the conductive plate (39) is integrally formed, and the conductive plate (39) and the second incoming line terminal (40) and/or the terminals are integrally formed.

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