CN212784499U - Circuit breaker - Google Patents

Abstract

The utility model relates to the field of low-voltage electrical appliances, in particular to a circuit breaker, wherein a locking plate component comprises a locking plate and a locking hook; the guide rail comprises a first locking groove, a second locking groove, a first transition boss and a second transition boss; when the locking hook is in limit fit with a locking groove, the locking plate moves and resets under the action of external force, and after the locking plate drives the locking hook to move out of the locking groove, the locking hook moves towards the first direction relative to the locking plate and is in limit fit with the side wall of the guide rail; the guide rail moves relative to the locking plate, the first transition boss or the second transition boss drives the locking hook to move towards a second direction relative to the locking plate, and when the locking hook is opposite to the other locking groove, the locking plate drives the locking hook to move and be inserted into the locking groove; the utility model discloses circuit breaker, its locking structure simple structure just can reliably lock the circuit breaker body.

Description

Circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus field, concretely relates to circuit breaker.

Background

The universal circuit breaker is divided into a fixed type and a drawer type, wherein the drawer type is composed of a drawer seat and a body, the main structure of the drawer seat is divided into a bottom plate, a side plate, a base and a zero flying arc cover, the bottom plate, the side plate, the base and the zero flying arc cover surround to form an open cavity, the body is positioned in the cavity, the body can be shaken in or out relative to the drawer seat through a rocker, a position indicating piece is arranged on the bottom plate of the drawer seat, and the position (connection, test and separation position) of the body can be indicated by the indicating piece in real time according to the condition that the body is shaken in or out of the drawer seat.

However, in the prior art, each station positioning structure is unstable, so that deviation is easily caused, and judgment of operators is influenced.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a circuit breaker, its locking structure simple structure just can reliably lock the circuit breaker body.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a circuit breaker comprises a drawer seat 1 and a circuit breaker body 2 arranged in the drawer seat 1; the drawer seat 1 comprises a drawer seat bottom plate 3A, and a sliding plate 1B and a locking structure which are respectively arranged on the drawer seat bottom plate 3A; the sliding plate 1B slides in a reciprocating manner relative to the drawer base bottom plate 3A under the action of an external force to drive the circuit breaker body 2 to switch among a separation position, a test position and a connection position; the locking structure comprises a guide rail 7B and a locking plate component 3B; the guide rail 7B is connected with the sliding plate 1B and moves synchronously, the guide rail 7B comprises three locking grooves which are sequentially arranged along the axial direction of the guide rail, namely a first locking groove 730B, a second locking groove 731B and a third locking groove 732B which respectively correspond to the separation position, the test position and the connection position;

the locking plate assembly 3B comprises a locking plate 31B and a locking hook 32B, the locking hook 32B is arranged on the locking plate 31B, the locking plate 31B is perpendicular to the moving direction of the guide rail 7B, and the locking hook 32B is in limit fit with a locking groove to lock the guide rail 7B; the guide rail 7B further comprises a first transition boss 730-731B disposed between the first locking groove 730B and the second locking groove 731B, and a second transition boss 731-732B disposed between the second locking groove 731B and the third locking groove 732B;

when the locking hook 32B is in limit fit with a locking groove, the locking plate 31B moves and resets under the action of external force, and after the locking plate 31B drives the locking hook 32B to move out of the locking groove, the locking hook 32B moves towards the first direction relative to the locking plate 31B and is in limit fit with the side wall of the guide rail 7B; the guide rail 7B moves relative to the locking plate 31B, the first transition boss 730-.

Preferably, the locking plate 31B can only move up and down relative to the locking plate 31B; the locking plate 31B is moved and reset under the action of external force, after the locking plate 31B drives the locking hook 32B to move out of the locking groove, the locking hook 32B moves downwards relative to the locking plate 31B, the lower end of the locking hook 32B moves over the bottom wall of the locking groove and is in limit fit with the side wall of the guide rail 7B; the first transition boss 730-731B or the second transition boss 731-732B drives the locking hook 32B to move upward relative to the locking plate 31B to a position where the lower end of the locking hook 32B is not lower than the bottom wall of the locking groove.

Preferably, the locking hook 32B includes a locking hook mounting part 320B and a locking hook locking part 321B, the locking hook locking part 321B being provided at a lower end of the locking hook mounting part 320B; the locking hook locking part 321B is in limit fit with the locking groove, and the first transition boss 730 and 731B or the second transition boss 731 and 732B drive the locking hook 32B to move upwards relative to the locking plate 31B through the locking hook mounting part 320B.

Preferably, the locking plate 31B comprises a locking plate body 31-0B and a locking plate hook installation part 31-3B arranged at one end of the locking plate body 31-0B, a locking plate guide rail avoiding groove 31-2B for avoiding the guide rail 7B is formed at one side of the connection part of the locking plate body 31-0B and the locking plate hook installation part 31-3B, the guide rail 7B penetrates through the locking plate guide rail avoiding groove 31-2B, and the locking plate hook installation part 31-3B and the locking hook 32B are positioned on the upper side of the guide rail 7B.

Preferably, the locking plate 31B further comprises a locking plate hook limiting part 316-1B connected with one end of the locking plate hook mounting part 31-3B in a bending way and a locking plate hook mounting shaft 311-2B arranged on the locking plate hook mounting part 31-3B, and the locking plate hook limiting part 316-1B and the locking plate body 31-0B are respectively connected with two ends of the locking plate hook mounting part 31-3B; the locking plate hook limiting part 316-1B is in limiting fit with the locking hook mounting part 320B; the locking hook 32B comprises a locking hook waist-shaped hole 323B arranged on the locking hook mounting part 320B, and the locking hook 32B is mounted on the locking plate hook mounting shaft 311-2B through the locking hook waist-shaped hole 323B and is in limit fit with the locking plate hook limiting part 316-1B; the width of the locking hook waist-shaped hole 323B is matched with the outer diameter of the locking plate hook mounting shaft 311-2B, and the length of the locking hook waist-shaped hole 323B is larger than the outer diameter of the locking plate hook mounting shaft 311-2B.

Preferably, the first locking groove 730B, the first transition boss 730-; the first transition boss 730-731B and the second transition boss 731-732B are isosceles trapezoid bosses or arc bosses.

Preferably, the locking plate assembly 3B further includes a second mounting plate 30B fixedly disposed on the drawer base bottom plate 3A and disposed parallel to the locking plate 31B, the locking plate 31B is connected to the second mounting plate 30B through a first connection limiting structure, and the locking plate 31B is only horizontally movable with respect to the second mounting plate 30B.

Preferably, the first connection limiting structure includes a first locking plate limiting shaft 302B and a second locking plate limiting shaft 303B respectively provided on the second mounting plate 30B, and a first locking plate kidney-shaped hole 312B and a second locking plate kidney-shaped hole 313B respectively provided on the locking plate 31B; the first lock plate kidney-shaped hole 312B and the second lock plate kidney-shaped hole 313B are respectively engaged with the first lock plate stopper shaft 302B and the second lock plate stopper shaft 303B.

Preferably, the locking structure further comprises first locking springs 30-31B, and both ends of the first locking springs 30-31B are respectively connected with the second mounting plate 30B and the locking plate 31B of the locking plate assembly 3B.

Preferably, the drawer base 1 further comprises a screw rod 4B, the guide rail 7B is arranged on one side of the screw rod 4B and is parallel to the screw rod 4B, the screw rod 4B comprises a screw rod thread part 40B arranged at one end of the screw rod, the screw rod thread part 40B is in threaded connection with the sliding plate 1B, and the screw rod 4B axially rotates to drive the sliding plate 1B to slide back and forth relative to the drawer base bottom plate 3A;

the locking plate 31B further comprises a locking plate lead screw avoiding hole 310B and a locking plate lead screw locking protrusion 3100B arranged at one end of the locking plate lead screw avoiding hole 310B; the lead screw 4B includes a plurality of lead screw locking grooves 42B provided thereon;

the screw 4B is inserted into the locking plate screw avoiding hole 310B, and when the locking plate 31B locks the guide rail 7B, the locking plate screw locking protrusion 3100B is simultaneously inserted into the screw locking groove 42B to lock the screw 4B.

Preferably, the drawer base 1 further comprises a first mounting plate 2B fixedly connected with the drawer base bottom plate 3A and arranged in parallel with a second mounting plate 30B, the sliding plate 1B, the first mounting plate 2B, the locking plate 31B and the second mounting plate 30B are sequentially arranged, and the lead screw 4B is rotatably connected with the first mounting plate 2B and the second mounting plate 30B respectively.

Preferably, the drawer base 1 further comprises a locking reset structure for unlocking the locking relationship between the locking plate assembly 3B and the guide rail 7B and between the locking plate assembly and the guide rail 4B, the locking reset structure comprises a reset rotating shaft 90B and a reset operating handle 91B, two ends of the reset rotating shaft 90B are respectively connected with the locking plate 31B and the reset operating handle 91B in a driving mode, the reset operating handle 91B is shifted, the reset rotating shaft 90B is driven to axially rotate, the reset rotating shaft 90B drives the locking plate 31B to move, the locking hook 32B is moved out of the locking groove and is in spacing fit with the side wall of the guide rail 7B, and meanwhile, the locking plate lead screw locking protrusion 3100B is moved out of the lead screw locking.

Preferably, the reset rotating shaft 90B comprises a reset rotating shaft main body which is rotatably arranged and two reset rotating shaft toggle arms which are respectively arranged at two ends of the rotating shaft main body, wherein each reset rotating shaft toggle arm is of an L-shaped structure and comprises a toggle arm connecting part which is vertically connected with the reset rotating shaft main body and a toggle arm transmission part which is parallel to the reset rotating shaft main body;

the reset operation handle 91B comprises a reset operation handle main board 91-1B, and a reset operation handle driving part 91-3B and a reset operation handle padlock handle 91-2B which are respectively arranged at two sides of the reset operation handle main board 91-1B, wherein the middle part of the reset operation handle driving part 91-3B is provided with a waist-shaped reset operation handle driving groove 91-30B which is matched with the poking arm transmission part in a driving way.

Preferably, the drawer base 1 further includes a drawer base panel 5A disposed at one end of the drawer base bottom plate 3A and fixedly connected to the drawer base panel, the reset operation handle main plate 91-1B is slidably disposed on the drawer base panel 5A, the drawer base panel 5A includes a panel padlock handle 51A disposed thereon, when the lock plate 31B locks the guide rail 7B and the screw rod 4B, the reset operation handle padlock handle 91-2B is closely adjacent to the panel padlock handle 51A, and the reset operation handle 91-2B and the panel padlock handle 51 are located together through the lock 92B to prevent the reset operation handle 91B from moving, so that the lock plate 31B keeps locking the guide rail 7B and the screw rod 4B.

Preferably, the drawer base 1 further includes a locking reset structure for releasing the locking relationship between the locking plate 31B and the guide rail 7B and between the locking plate and the lead screw 4B, the locking reset structure includes a reset button 93B, a reset button reset spring 94B and a reset link 95B, the middle of the reset link 95B is rotatably disposed, the reset button 93B is drivingly connected with the locking plate 31B through the reset link 95B, the reset button 93B is pressed to drive one end of the reset link 95B to swing, the other end of the reset link 95B drives the locking plate 31B to move, the locking of the guide rail 7B and the lead screw 4B is released, and the reset button reset spring 94B drives the reset button 93B to reset.

Preferably, the reset button return spring 94B is sleeved on the screw rod 4B; the drawer base 1 further comprises a drawer base panel 5A which is arranged at one end of the drawer base bottom plate 3A and fixedly connected with the drawer base bottom plate, and the reset button 93B is arranged on the drawer base panel 5A in a sliding mode.

The utility model discloses circuit breaker, its locking structure can realize the reliable locking of guide rail 7B, guarantees that circuit breaker body 2 is reliably locked at separation position or experimental position or hookup location, has guaranteed the reliability of circuit breaker work. In addition, the lock 92B locks the reset lever padlock handle 91-2B and the panel padlock handle 51A together, and prevents the reset lever 91B from moving, so that the locking plate 31B holds the locking rail 7B and the lead screw 4B, thereby preventing unintended unlocking operations (e.g., a malfunction of a user, an illegal operation by a person, or the like) and securing the electricity safety of the user.

Drawings

Fig. 1 is a schematic structural diagram of the circuit breaker of the present invention, at least showing the assembly relationship between the drawer seat and the circuit breaker body;

fig. 2 is a schematic structural view of the drawer base of the present invention;

fig. 3 is a schematic structural view of the drawer base of the present invention, at least showing the assembly relationship between the unlocking electromagnet and the locking structure;

fig. 4 is a schematic structural view of the drawer base of the present invention, at least showing the assembly relationship between the locking reset structure and the locking structure of the first embodiment, and the assembly relationship between the indicator and the guide rail of the first embodiment;

fig. 5 is a schematic structural view of the reset operation handle of the present invention, at least showing the structure of one side of the reset operation handle;

fig. 6 is a schematic structural view of the reset operation handle of the present invention, at least showing the structure of the other side of the reset operation handle;

fig. 7 is a schematic structural view of a locking reset structure according to a second embodiment of the present invention, in which the locking plate assembly locks the guide rail;

fig. 8 is a schematic structural diagram of a locking reset structure according to a second embodiment of the present invention, in which the locking reset structure drives the locking plate assembly to reset;

FIG. 9 is a schematic view showing the assembly relationship of the screw rod, the clutch structure and the driving gear according to the present invention;

fig. 10 is an exploded view of the screw, clutch mechanism and driving gear of the present invention;

FIG. 11 is a schematic sectional view showing the assembly relationship of the screw rod, the clutch structure and the driving gear according to the present invention;

fig. 12 is a schematic structural view of the operating handle of the present invention;

fig. 13A is a schematic structural view of the locking structure of the first embodiment of the present invention, when the locking plate is engaged with the second limiting wall for limiting;

fig. 13B is a schematic structural view of the locking structure of the first embodiment of the present invention, wherein the locking plate is engaged with the first limiting wall in a limiting manner;

fig. 13C is a schematic structural view of the locking structure according to the first embodiment of the present invention, wherein the locking plate is in limit fit with the locking groove;

fig. 13D is a schematic structural view of the locking structure according to the first embodiment of the present invention, wherein the locking plate is again engaged with the second limiting wall after being reset;

fig. 14 is a schematic structural view of a second mounting plate according to the first embodiment of the present invention;

fig. 15 is a schematic view of the locking plate and the lead screw according to the first embodiment of the present invention;

fig. 16 is a schematic structural view of a guide rail according to a first embodiment of the present invention;

fig. 16A is another schematic structural view of the guide rail according to the first embodiment of the present invention;

fig. 17A is a schematic structural view of a locking structure according to a second embodiment of the present invention, in which the locking plate is engaged with the side wall of the guide rail after being reset;

fig. 17B is a schematic structural view of a locking structure according to a second embodiment of the present invention, wherein the locking plate is engaged with the second transition projection;

fig. 17C is a schematic structural view of a locking structure according to a second embodiment of the present invention, in which the locking plate is opposite to the third locking groove;

fig. 17D is a schematic structural view of the locking structure according to the second embodiment of the present invention, wherein the locking plate is in limit fit with the third locking groove;

fig. 18 is an exploded view of a locking structure of a second embodiment of the present invention;

fig. 19 is a schematic structural view of a guide rail according to a second embodiment of the present invention;

FIG. 20 is a schematic structural view of the slide board of the present invention;

fig. 21A is a schematic structural diagram of a locking structure according to a third embodiment of the present invention, in which the locking plate and the unlocking plate are reset, and the unlocking hook is in limit fit with the guide rail;

fig. 21B is a schematic structural view of a locking structure according to a third embodiment of the present invention, in which the unlocking hook is disengaged from the first unlocking groove to limit the engagement with the guide rail;

fig. 21C is a schematic structural view of a locking structure according to a third embodiment of the present invention, in which the locking plate hook is in limit fit with the first locking groove;

fig. 21D is a schematic structural view of a locking structure according to a third embodiment of the present invention, in which the locking plate and the unlocking plate are reset again, and the unlocking hook is in limit fit with the guide rail;

fig. 22A is an exploded view of a locking structure according to a third embodiment of the present invention;

fig. 22B is a schematic view of the matching relationship between the unlocking hook and the guide rail of the present invention;

fig. 23 is a schematic structural view of an indicator according to a second embodiment of the present invention;

fig. 24 is a topology of the power supply circuit of the motor of the present invention;

fig. 25 is a schematic structural view of the energy storage operation mechanism of the circuit breaker body of the present invention, showing at least the structure of the rotary shaft assembly;

fig. 26A is a schematic structural diagram of the energy storage operating mechanism of the circuit breaker body according to the present invention, in which the circuit breaker body is in an open state;

fig. 26B is a schematic structural diagram of the energy storage operating mechanism of the circuit breaker body according to the present invention, at this time, the circuit breaker body is in a closing state;

fig. 27 is a schematic structural view of the drawer base of the present invention, at least showing the assembly relationship of the first lever, the second lever and the baffle limiting component;

fig. 28A is an assembly relationship of the first lever, the second lever, and the baffle limiting assembly of the present invention, in which the circuit breaker body is in the open state;

fig. 28B is an assembly relationship of the first lever, the second lever, and the baffle limiting assembly of the present invention, in which the circuit breaker body is in a closing state;

fig. 29 is a schematic structural view of the screw rod baffle of the present invention;

fig. 30 is a schematic view showing the fitting relationship between the second switch element and the lock plate according to the present invention.

Detailed Description

The following description will further describe a specific embodiment of the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 30. The circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1, the circuit breaker of the present invention includes a drawer base 1 and a circuit breaker body 2 disposed inside the drawer base 1. As shown in fig. 2, 13A to 13D, 17A to 17D and 21A to 21D, the drawer base 1 includes a drawer base bottom plate 3A, a lead screw 4B, a sliding plate 1B, a locking structure, an operating handle 1C (as shown in fig. 12, it should be noted that the operating handle 1C shown in the figure is actually only an end structure linked with the lead screw 4B of the drawer base 1, and it further includes a rocker structure extending outward, and a user drives the end structure by holding and rotating the rocker structure to drive the lead screw 4B to rotate), and an electric device; one end of the screw rod 4B is a screw rod thread part 40B (shown in figure 9) in threaded connection with the sliding plate 1B, the other end of the screw rod 4B is a screw rod driven part, the screw rod driven part is respectively in driving fit with an electric device and an operating handle 1C, the sliding plate 1B is in driving connection with the circuit breaker body 2, the operating handle 1C or the electric device drives the screw rod 4B to rotate (the screw rod 4B axially rotates), the sliding plate 1B is further driven to slide back and forth relative to the drawer base bottom plate 3A, and the sliding plate 1B drives the circuit breaker body 2 to switch among a separation position, a test position and a; a clutch structure is arranged between the electric device and the screw rod 4B, and the driving fit between the electric device and the screw rod 4B can be released through the clutch structure, namely the screw rod 4B cannot be driven to rotate through the electric device; the locking structure comprises a locking plate component 3B and a guide rail 7B, one end of the guide rail 7B is connected with the sliding plate 1B and moves synchronously, the guide rail 7B comprises three locking grooves which are sequentially arranged along the axial direction of the guide rail 7B, namely a first locking groove 730B, a second locking groove 731B and a third locking groove 732B which respectively correspond to a separation position, a test position and a connection position, and when the breaker body 2 is respectively located at the separation position, the test position and the connection position, the locking plate component 3B is respectively in limit fit with the first locking groove 730B, the second locking groove 731B and the third locking groove 732B to lock the guide rail 7B; the locking plate component 3B is in limit fit with the screw rod 4B while locking the guide rail 7B, and locks the screw rod 4B.

The utility model discloses an improvement point of circuit breaker lies in separation and reunion structure: as shown in fig. 9-11, the electric device includes a driving gear 60B sleeved on the screw rod driven portion of the screw rod 4B and a clutch structure arranged on the screw rod 4B, and the clutch structure is simultaneously in limit fit with the screw rod 4B and the driving gear 60B, so that the screw rod 4B and the driving gear 60B are linked; the middle part of the free end of the screw rod driven part is provided with a screw rod operation hole 4-0B, and when the operation handle 1C is inserted into the screw rod operation hole 4-0B, the clutch structure and the driving gear 60B are driven to release the limit fit, so that the screw rod 4B can rotate relative to the driving gear 60B. The utility model discloses circuit breaker, when its separation and reunion structure was spacing cooperated with lead screw 4B, drive gear 60B simultaneously, realized the linkage of lead screw 4B and drive gear 60B, operating handle 1C inserted lead screw handle hole 4-0B can drive separation and reunion structure and drive gear 60B and remove spacing cooperation, thereby make the utility model discloses circuit breaker can compatible manual and electric operation simultaneously, the two is not influenced each other, when making the user drive lead screw 4B axial rotation through operating handle 1C, need not to overcome electric actuator's resistance, the operation is lighter smooth; the driving gear 60B is sleeved on the screw rod driven portion, the clutch structure is arranged on the screw rod driven portion, the structure is more compact, the principle is simpler, and the matching is more reliable.

The utility model discloses another improvement point of circuit breaker lies in locking structure, and locking structure has following three kinds of embodiments, is respectively:

as shown in fig. 13A-16, a first embodiment of the locking structure.

As shown in fig. 13A to 13D, the locking plate assembly 3B includes a locking plate 31B which is engaged with the locking groove to lock the rail 7B, the locking plate 31B being perpendicular to the moving direction of the rail 7B; as shown in fig. 16, the guide rail 7B includes a first limit wall 73B and a second limit wall 74B disposed along the axial direction thereof, a first transition projection 730 a 731B disposed between the first locking groove 730B and the second locking groove 731B, and a second transition projection 731 a 732B disposed between the second locking groove 731B and the third locking groove 732B; the first limiting wall 73B is superposed on one side of the second limiting wall 74B, the three locking grooves are sequentially arranged on the first limiting wall 73B, the first limiting wall 73B comprises a first limiting wall 73-0B extending along the axial direction of the first limiting wall, and the second limiting wall 74B comprises a second limiting wall 74-0B extending along the axial direction of the second limiting wall; as shown in fig. 13A-13D, when the locking plate 31B is in limit engagement with the second limit wall 74-0B, the guide rail 7B moves relative to the locking plate 31B, the first transition boss 730-731B or the second transition boss 732 drives the locking plate 31B to disengage from the second limit wall 74-0B and then to be in limit engagement with the first limit wall 73-0B, when the locking plate 31B is opposite to a locking groove, the locking plate 31B (under the action of the first locking spring 30-31B) is inserted into the locking groove and locks the guide rail 7B, and when the locking plate 31B is moved to reset by external force, the locking plate 31B is in limit engagement with the second limit wall 74-0B again. Further, as shown in fig. 16, the guide rail 7B includes a guide rail main body 70B, and the first limiting wall 73B, the second limiting wall 74B and the guide rail main body 70B are sequentially stacked together to form a three-step structure; the first transition boss 730-. The utility model discloses circuit breaker, its locking structure only through lockplate 31B and guide rail 7B's cooperation, can realize guide rail 7B's locking and unblock, simple structure, and is easy and simple to handle, is favorable to simplifying the structure of drawer seat 1, the installation and the operation of the drawer seat 1 of being convenient for.

As shown in fig. 17A-19, a second embodiment of the locking structure.

As shown in fig. 17A to 17D, the locking plate structure 3B includes a locking plate 31B and a locking hook 32B, the locking hook 32B is disposed on the locking plate 31B and can move one-dimensionally relative to the locking plate 31B, the locking plate 31B is perpendicular to the moving direction of the guide rail 7B, and the locking hook 32B is in limit fit with the locking groove to lock the guide rail 7B; as shown in FIG. 19, the guide rail 7B further includes a first transition projection 730-731B disposed between the first locking groove 730B and the second locking groove 731B and a second transition projection 731-732B disposed between the second locking groove 731B and the third locking groove 732B; as shown in fig. 17A-17D, when the locking hook 32B is in limit engagement with a locking groove, the locking plate 31B is moved to reset by an external force, and after the locking plate 31B drives the locking hook 32B to move out of the locking groove, the locking hook 32B moves in a first direction relative to the locking hook 31B and is in limit engagement with the side wall of the guide rail 7B; the guide rail 7B moves relative to the locking plate 31B, the first transition boss 730-. Further, as shown in fig. 17A to 17D, the lock hook 32B can only move up and down with respect to the lock plate 31B; the locking plate 31B is moved to reset by external force, after the locking plate 31B drives the locking hook 32B to move out of the locking groove, the locking hook 32B moves downwards relative to the locking plate 31B, the lower end of the locking hook 32B moves over the bottom wall of the locking groove and is in limit fit with the side wall of the guide rail 7B; the first transition boss 730-731B or the second transition boss 731-732B drives the locking hook 32B to move upward relative to the locking plate 31B to a position where the lower end of the locking hook 32B is not lower than the bottom wall of the locking groove. The utility model discloses circuit breaker, its locking structure can realize the reliable locking of guide rail 7B, guarantees that circuit breaker body 2 is reliably locked at separation position or experimental position or hookup location, has guaranteed the reliability of circuit breaker work.

As shown in fig. 21A-22B, a third embodiment of the locking structure.

As shown in fig. 21A-22B, the locking plate assembly 3B includes a locking plate 31B and an unlocking plate 33B, the unlocking plate 33B is provided on the locking plate 31B and movably connected thereto, the locking plate 31B is perpendicular to the moving direction of the guide rail 7B, and the locking plate 31B is engaged with the locking groove to lock the guide rail 7B; the unlocking plate 33B comprises an unlocking hook 331B, and the locking plate 31B comprises a locking plate hook 316-2B; as shown in fig. 22, the guide rail 7B further includes a first unlocking groove 750B provided between the first locking groove 730B and the second locking groove 731B and a second unlocking groove 751B provided between the second locking groove 731B and the third locking groove 732B; as shown in fig. 21A-21D, when the locking plate 31B locks the guide rail 7B, the locking plate hook 316-2B is in limit fit with one locking groove, the unlocking hook 331B is located on the first side of the guide rail 7B, the locking plate 31B is moved to reset by external force, the locking plate 31B drives the locking plate hook 316-2B and the unlocking hook 331B to move to the second side of the guide rail 7B, the unlocking hook 331B is in limit fit with the guide rail 7B, the guide rail 7B moves relative to the locking plate 31B, the unlocking hook 331B is in limit fit with the guide rail 7B from the first unlocking groove 750B or the second unlocking groove 751B or the locking groove and moves to the first side of the guide rail 7B, the locking plate hook 316-2B is in limit fit with the guide rail 7B, and when the locking plate hook 316-2B is opposite to the other locking groove, the locking plate hook 316-2B is inserted into.

Preferably, as shown in fig. 22, the first and second unlocking grooves 750B and 751B have a depth smaller than that of the locking grooves; as shown in fig. 22B, the lower end of the locking plate 316-2B protrudes below the lower end of the unlocking hook 331B.

Preferably, as shown in fig. 22B, when the unlocking hook 331B is in limit fit with the guide rail 7B, a gap exists between the locking plate hook 316-2B and the guide rail 7B.

The utility model discloses circuit breaker, its locking structure through lockplate 31B locking guide rail 7B, realizes guide rail 7B's unblock through unlocking plate 33B, has realized guide rail 7B's reliable locking and unblock, guarantees that circuit breaker body 2 is reliably locked at separation position or experimental position or hookup location, has guaranteed the reliability of circuit breaker work.

The utility model discloses a circuit breaker's another improvement point lies in, and the circuit breaker is still including the indicator 8B that is used for instructing circuit breaker body current position, as shown in fig. 4 and 23, and guide rail 7B links to each other with the drive of indicator 8B, and slide 1B reciprocating sliding is when switching over between separation position, experimental position and hookup location with drive circuit breaker body 2, and guide rail 7B drive indicator 8B rotates.

For example, the indicator 8B can be drivingly connected to the guide rail 7B in two ways:

the first mode is as follows: as shown in FIG. 4, the indicating member 8B is a cylindrical structure, the guide rail 7B is in driving connection with the indicating member 8B through the transmission connecting rod 7-8B, and the indicating member 8B is driven to rotate axially.

It should be noted that the indicator 8B may also be engaged with a gear via a rack, the gear is coaxially linked with the indicator 8B, and the rack is connected with the guide rail 7B and moves synchronously.

In a second mode, as shown in fig. 23, the drawer base 1 further includes a drawer base panel 5A, the drawer base panel 5A is provided with an indication member installation hole, and the indication member 8B is a cylindrical structure and is rotatably disposed in the indication member installation hole; the guide rail 7B is connected with an indicating piece 8B through a flexible connecting piece, and an indicating piece reset torsion spring is arranged between the indicating piece 8B and the drawer seat panel 5A. Further, the flexible connector is a steel wire or a nylon cord, and the indicator 8B includes an indicator capstan for winding the flexible connector.

The utility model discloses circuit breaker, its indicator 8B simple structure, the simple installation is favorable to simplifying the structure of drawer seat 1, and indicator 8B links to each other with guide rail 7B drive, can accurately reflect 2 current positions of circuit breaker body, avoids the wrong report.

Another improvement point of the circuit breaker of the present invention is the control of the electric device, as shown in fig. 2 and fig. 24-30, the electric device includes a motor 5B and a gear mechanism 6B, the motor 5B is drivingly connected with the screw rod 4B through the gear mechanism 6B; the circuit breaker further comprises a first switch piece connected in series in a power supply loop of the motor 5B, and when the circuit breaker body 2 is located at the connection position, the circuit breaker body 2 is switched on and drives the first switch piece to act at the same time, so that the power supply loop of the motor 5B is disconnected. Further, as shown in fig. 25 to 28B, the circuit breaker body 2 includes an energy storage operating mechanism, the energy storage operating mechanism includes a rotating shaft assembly 1D connected to the moving contact of the circuit breaker body 2 in a driving manner, and the rotating shaft assembly 1D is in driving fit with the first switch element. The utility model discloses circuit breaker, its circuit breaker body 2 are located hookup location, and the action of the first switch of combined floodgate simultaneous drive breaks off motor 5B's power supply loop to avoid taking place the condition that circuit breaker body 2 shifts out from hookup location through electric actuator under the 2 combined floodgate states of circuit breaker body, guaranteed user's power consumption security.

Preferably, as shown in fig. 27 and 29, the drawer base 1 further includes a screw rod baffle 6D, the screw rod baffle 6D includes a handle insertion hole 62D formed therein, and the handle insertion hole 62D is disposed in a staggered manner with respect to one end of the screw rod 4B; the operating handle 1C drives the lead screw baffle 6D to move to one side, so that the handle insertion hole 62D is opposite to the lead screw 4B, and the operating handle 1C penetrates through the handle insertion hole 62D to be connected with the lead screw 4B in a driving mode; as shown in fig. 27-28B, the drawer base 1 further includes a baffle limiting assembly 4D in driving fit with the first lever 20D, when the circuit breaker body 2 is located at the connection position and is switched on, the rotating shaft assembly 1D drives the baffle limiting assembly 4D to move, and the baffle limiting assembly 4D is in limiting fit with the lead screw baffle 6D to prevent the lead screw baffle 6D from moving. The utility model discloses circuit breaker, the spacing subassembly 4D of its baffle is located hookup location when closing a floodgate at circuit breaker body 2, with the spacing cooperation of lead screw baffle 6D to avoid circuit breaker body 2 to take place the condition that circuit breaker body 2 shifted out from hookup location through operating handle 1C under the combined floodgate state, guaranteed user's power consumption security.

Preferably, as shown in fig. 24 and 30, the circuit breaker of the present invention further includes a second switch serially connected in the power supply circuit of the motor 5B, and the second switch is driven to disconnect the power supply circuit of the motor 5B when the locking plate assembly 3B locks the guide rail 7B and the lead screw 4B, respectively. The utility model discloses circuit breaker, its second switch spare can be when lockplate subassembly 3B locks guide rail 7B and lead screw 4B, breaks off motor 5B's power supply circuit simultaneously to realized electric actuator's accurate control, avoided taking place lockplate subassembly 3B to accomplish still work after 7B and the locking of lead screw 4B of guide rail, the condition of damage locking structure takes place.

The circuit breaker of the present invention will be further described with reference to the drawings and the specific embodiments.

As shown in fig. 1 to 16 and 23, which are a first embodiment of the circuit breaker of the present invention.

As shown in fig. 1, the circuit breaker of the present invention includes a drawer base 1 and a circuit breaker body 2 disposed in the drawer base 1.

As shown in fig. 1, the drawer base 1 is the same as the prior art in that: the two all include drawer seat bottom plate 3A, drawer seat curb plate and zero arcing cover 4A, and drawer seat curb plate is first curb plate 1A and second curb plate 2A including two blocks of curb plates of relative setting respectively, and drawer seat bottom plate 3A, zero arcing cover 4A, first curb plate 1A and second curb plate 2A enclose into a square assembly space jointly, and circuit breaker body 2 sets up in this square assembly space.

As shown in fig. 2, the drawer base 1 further includes a sliding plate 1B, a screw rod 4B, a mounting plate, a locking structure, an electric device, and an operating handle 1C; the mounting plate is fixedly arranged on the bottom plate 3A of the drawer seat, and the screw rod 4B is arranged on the mounting plate and is rotationally connected with the mounting plate; the electric device comprises a motor 5B and a gear mechanism 6B, wherein the motor 5B is in driving connection with the screw rod 4B through the gear mechanism 6B; the sliding plate 1B is arranged on the upper side of the drawer seat bottom plate 3A in a sliding mode, one end of the screw rod 4B is a screw rod thread part 40B connected with the sliding plate 1B in a threaded mode, the other end of the screw rod 4B is a screw rod driven part and is respectively in driving fit with the electric device and the operating handle 1C, the electric device or the operating handle 1C drives the screw rod 4B to axially rotate (the screw rod 4B axially rotates), and the sliding plate 1B is driven to slide (move) in a reciprocating mode relative to the drawer seat bottom plate 3A so as to drive the circuit breaker body 2 to switch among a separation position, a test; a clutch structure is arranged between the electric device and the screw rod 4B, and the driving fit between the electric device and the screw rod 4B can be released through the clutch structure, namely the screw rod 4B cannot be driven to axially rotate through the electric device; the locking structure comprises a locking plate component 3B and a guide rail 7B, the guide rail 7B is connected with the sliding plate 1B and moves synchronously, the guide rail 7B comprises three locking grooves which are axially arranged, namely a first locking groove 730B, a second locking groove 731B and a third locking groove 732B which respectively correspond to a separation position, a test position and a connection position, and when the breaker body 2 is respectively located at the separation position, the test position and the connection position, the locking plate component 3B is respectively in limit fit with the first locking groove 730B, the second locking groove 731B and the third locking groove 732B to lock the guide rail 7B; the locking plate component 3B is in limit fit with the screw rod 4B while locking the guide rail 7B, and locks the screw rod 4B.

Preferably, as shown in fig. 4 and 9-11, is an embodiment of the clutch structure.

As shown in fig. 4 and 9-11, the gear mechanism 6B of the electric device includes a driving gear 60B sleeved on the screw rod driven portion of the screw rod 4B and a clutch structure arranged on the screw rod 4B, and the clutch structure is simultaneously in limit fit with the screw rod 4B and the driving gear 60B, so that the screw rod 4B and the driving gear 60B are linked; the middle part of the free end of the screw rod driven part is provided with a screw rod operation hole 4-0B, an operation handle 1C is inserted into the screw rod operation hole 4-0B and drives the clutch structure to be released from limiting matching with the driving gear 60B, so that the screw rod 4B can rotate relative to the driving gear 60B.

Preferably, as shown in fig. 9 to 11, the clutch structure includes a clutch member 44B slidably disposed on the lead screw 4B and a clutch member return spring 45B disposed between the clutch member 44B and the lead screw 4B, and the clutch member return spring 45B applies a force to the clutch member 44B to keep the clutch member 44B in limit engagement with the drive gear 60B (when the clutch member 44B is in limit engagement with the gear 60B, the lead screw 4B and the drive gear 60B are rotated synchronously). Further, as shown in fig. 11, the screw driven portion includes a clutch member track hole 43B provided in a middle portion thereof and extending in an axial direction of the screw 4B, and the clutch member 44B is slidably provided in the clutch member track hole 43B; the drive gear 60B includes at least one drive gear retaining groove 602B disposed at one end thereof; the clutch piece 44B is in spacing fit with the lead screw 4B through the clutch piece track hole 43B and in spacing fit with the driving gear 60B through the driving gear spacing groove 602B, and after the driving gear 60B is connected with the lead screw 4B, the driving gear spacing groove 602B corresponds to the clutch piece track hole 43B, so that the clutch piece 44B slides in the clutch piece track hole 43B under the driving of the clutch piece reset spring 45B and enters the driving gear spacing groove 602B to limit the driving gear 60B. Further, as shown in fig. 11, two openings of the clutch member track hole 43B are respectively located at two radial ends of the screw driven portion, two ends of the clutch member 44B respectively protrude from two sides of the two openings of the clutch member track hole 43B, the driving gear 60B includes two sets of driving gear limiting grooves 602B, and two driving gear limiting grooves 602B of each set of driving gear limiting grooves 602B are respectively located at two radial ends of the driving gear 60B and are respectively in limit fit with two ends of the clutch member 44B.

Preferably, as shown in fig. 11, the lead screw 4B includes a clutch member return spring groove 4-2B disposed in the middle of the driven portion of the lead screw and having one end communicating with the clutch member track hole 43B, the clutch member return spring groove 4-2B extends axially along the lead screw 4B, one end of the clutch member return spring 45B is disposed in the clutch member spring groove 4-2B, and the other end is in spacing fit with the clutch member 44B, thereby ensuring the reliability of the installation of the clutch member return spring 45B. Further, as shown in fig. 10 and 11, the clutch structure further includes a clutch guide column 46B, one end of the clutch guide column 46B is connected to the clutch 44B, the other end of the clutch guide column is inserted into the clutch return spring 45B and is in limit fit with the clutch return spring 45B, the end of the clutch guide column is located in the return spring groove 4-2B, and the clutch guide column 46B is in limit fit with the return spring groove 4-2B, so that the reliability and stability of the motion trajectory of the clutch 44B are ensured, the reliable operation of the clutch structure is ensured, and the condition that the clutch 44B fails to be matched with the driving gear 60B due to the deviation of the clutch 44B is avoided.

Preferably, as shown in fig. 10, the clutch member 44B and the clutch member guide column 46B are in a T-shaped configuration, one end of the clutch member guide column 46B is connected to the middle portion of the clutch member 44B, and the two ends of the clutch member 44B extend into the clutch member track hole 43B for sliding engagement.

Preferably, as shown in fig. 10, the clutch member 44B has a T-shaped structure, and includes a clutch member engaging portion 440B and a clutch member connecting portion 441B disposed at a right angle to the clutch member engaging portion 440B; one end of the clutch guide column 46B is provided with a clutch guide column hole, and the clutch connecting portion 441B is inserted into the clutch guide column hole to realize the connection of the clutch 44B and the clutch guide column 46B. It should be noted that the clutch 44B and the clutch guide 46B can be provided as a unitary structure, and the structure of the lead screw 4B can be adjusted accordingly to accommodate the installation requirements of the unitary clutch 44B and the clutch guide 46B, which can complicate the lead screw 4B. The utility model discloses the preferred split type clutch 44B of circuit breaker and clutch guide post 46B, one then can reduce the complexity of spare part structure to reduce the production degree of difficulty, two come its assembly convenient more nimble.

Preferably, as shown in fig. 10 and 11, the lead screw 4B further includes a first annular stop 480B and a first annular groove 481B respectively disposed on the driven portion of the lead screw, a gear shaft portion 482B is formed between the first annular stop 480B and the first annular groove 481B, the driving gear 602B is sleeved on the gear shaft portion 482B, and a gear limit clip 47B is disposed in the first annular groove 481B to limit the driving gear 60B between the first annular stop 480B and the gear limit clip 47B. Further, as shown in fig. 10 and 11, both ends of the clutch member track hole 43B are respectively located at both sides of the first annular shelf 480B.

Preferably, as shown in fig. 10, in an embodiment of the driving gear 60B, the driving gear 60B includes a gear end 600B and a mating end 601B, a driving gear limiting groove 602B is disposed on the mating end 601B, and a driving gear assembling hole 603B is disposed in the middle of the driving gear 60B.

Specifically, as shown in fig. 11, the clutch-return spring groove 4-2B, the clutch-track hole 43B, and the lead screw operation hole 4-0B are sequentially disposed in the middle of the lead screw driven portion from left to right along the axial direction of the lead screw 4B, the left end of the clutch-track hole 43B is communicated with the right end of the clutch-return spring groove 4-2B, the right end of the clutch-track hole 43B is communicated with the lead screw operation hole 4-0B, the clutch-return spring 45B keeps the clutch 44B at the right end of the clutch-track hole 43B in spacing engagement with the drive gear 60B, and the operating handle IC is inserted into the lead screw operation hole 4-0B to drive the clutch 44B to move leftward against the acting force of the clutch-return spring 45B, so that the clutch 44B is released from spacing engagement with the drive gear 60B. Further, as shown in fig. 11, left and right ends of the clutch member track hole 43B are respectively located at left and right sides of the first annular stopper 480B. Further, the cross-sectional shape of the clutch member 44B may be various shapes such as not only a circular shape but also a oval shape; when circular, as shown in fig. 11, the width of the portion of the clutch member track hole 43B located on the right side of the first annular shelf 480 is greater than the outer diameter of the clutch member 44B, so that the entire diameter of the clutch member 44B is inserted into the driving gear spacing groove 602B of the driving gear 60B, thereby ensuring the reliability of spacing between the clutch member 44B and the driving gear 60B.

Preferably, as shown in fig. 4, 9-11, one way of assembling the lead screw 4B is as follows.

As shown in fig. 9, the lead screw 4B further includes a second annular stop 411B and a third annular boss 413B disposed between the lead screw threaded portion 40B and the lead screw driven portion, and a lead screw mounting shaft portion 412B is formed between the second annular stop 411B and the third annular stop 413B; the mounting panel includes first mounting panel 2B, and lead screw 4B rotates with first mounting panel 2B through lead screw installation axial region 412B and links to each other, and the second annular keeps off platform 411B and third annular and keeps off platform 413B and set up respectively in first mounting panel 2B both sides and respectively with the spacing cooperation of first mounting panel 2B.

Preferably, as shown in fig. 12, an embodiment of the operation handle 1C is engaged with the screw rod 4B.

As shown in fig. 12, the operating handle 1C includes a handle main body 10C, a limiting ball 12C and a limiting ball return spring 11C, the handle main body 10C is a polygonal columnar structure, one end of which is provided with a limiting ball assembling groove 100C, the limiting ball return spring 11C is arranged in the limiting ball assembling groove 100C, the limiting ball 12C is limited in the limiting ball assembling groove 100C, and the limiting ball return spring 11C applies an acting force to the limiting ball 12C to make one end of the limiting ball 12C protrude outside the limiting ball assembling groove 100C; as shown in fig. 10 and 11, the lead screw operation hole 4-0B is a polygonal hole, and at least one limit ball fitting hole 49B is formed in the side wall thereof; the operating handle 1C is inserted into the screw rod operating hole 4-0B, and after the clutch piece 44B and the driving gear 60B are released from the limit fit, the limit ball 12C and the limit ball fitting hole 49B are in limit fit, so that after the clutch piece 44B and the driving gear 60B are released from the limit fit by the user operating handle 1C, the pushing force does not need to be applied to the operating handle 1C all the time, the operating handle 1C is kept at the position, and the operation is convenient. Further, as shown in fig. 10 and 11, each side wall of the screw rod operation hole 4-0B is provided with a limiting ball fitting hole 49B, so that the limiting matching between the limiting ball 12C and the limiting ball fitting hole 49B can be conveniently and quickly realized without the need for a user to distinguish the position of the limiting ball fitting hole 49B.

Preferably, as shown in fig. 13A-16A, is a first embodiment of the locking structure.

As shown in fig. 13A-13D, the locking structure includes a rail 7B and a locking plate assembly 3B; the guide rail 7B is connected with the sliding plate 1B and moves synchronously, and the guide rail 7B comprises a first locking groove 730B, a second locking groove 731B and a third locking groove 732B which are sequentially arranged along the axial direction of the guide rail and respectively correspond to a separation position, a test position and a connection position; the locking plate assembly 3B comprises a locking plate 31B matched with the locking groove to lock the guide rail 7B, and the locking plate 31B is perpendicular to the moving direction of the guide rail 7B; the locking plate assembly 3B comprises a locking plate 31B, and the moving direction of the locking plate 31B is perpendicular to the moving direction of the guide rail 7B; as shown in fig. 16, the guide rail 7B further includes a first limit wall 73B and a second limit wall 74B disposed along the axial direction thereof, a first transition projection 730-731B disposed between the first locking groove 730B and the second locking groove 731B, and a second transition projection 731-732B disposed between the second locking groove 731B and the third locking groove 732B; the first limiting wall 73B is superposed on one side of the second limiting wall 74B, three locking grooves are sequentially arranged on the first limiting wall 73B, the first limiting wall 73B comprises a first limiting wall 73-0B extending along the axial direction of the first limiting wall, and the second limiting wall 74B comprises a second limiting wall 74-0B extending along the axial direction of the second limiting wall. As shown in fig. 13A-13D, when the locking plate 31B is in limit engagement with the second limit wall 74-0B, the guide rail 7B moves relative to the locking plate 31B, the first transition boss 730-731B or the second transition boss 731-732B drives the locking plate 31B to disengage from the second limit wall 74-0B and then to be in limit engagement with the first limit wall 73-0B, when the locking plate 31B is opposite to a locking groove, the locking plate 31B is inserted into the locking groove and locks the guide rail 7B, and when the locking plate 31B is moved to be reset by external force, the locking plate 31B is again in limit engagement with the second limit wall 74-0B.

Preferably, as shown in fig. 16 and 16A, the guide rail 7B includes a guide rail body 70B, and the first limit wall 73B, the second limit wall 74B and the guide rail body 70B are sequentially stacked together to form a three-step structure; the first limiting wall 73-0B and the second limiting wall 74-0B are arranged at intervals (the first limiting wall 73-0 and the second limiting wall 74-0B are preferably arranged in parallel, and an included angle with a certain angle can exist between the first limiting wall 73-0B and the second limiting wall 74-0B, and the included angle is 0-45 degrees), and are positioned on the same side of the first limiting wall 73B and the second limiting wall 74B; the first transition boss 730-.

Specifically, as shown in fig. 13A to 13D, the guide rail 7B can move back and forth relative to the locking plate 31B, the locking plate 31B can move left and right relative to the guide rail 7B, and the locking plate 31B can swing slightly relative to the guide rail 7B; as shown in fig. 13A, the left end of the locking plate 31B is in limit engagement with the second limit wall 74B, the guide rail 7B starts to move forward relative to the locking plate 31B, as shown in fig. 13B, the first transition boss 730 and 731B push against the locking plate 31B to make clockwise rotation with a slight amplitude, the locking plate 31B is disengaged from the second limit wall 74-0B and is in limit engagement with the first limit wall 73-0B, as shown in fig. 13C, the guide rail 7B continues to move forward until the locking plate 31B is opposite to a locking groove (the second locking groove 731B as shown in fig. 13C), the locking plate 31B moves leftward, the guide rail 7B is locked in the locking groove, when unlocking is required, the external force makes the locking plate 31B move rightward and make counterclockwise rotation with a slight amplitude, the locking plate 31B moves out of the locking groove and is in limit engagement with the second limit wall 74-0B again, the state shown in fig. 13D is entered.

Preferably, as shown in fig. 16 and 16A, the first transition boss 730-731B and the second transition boss 731-732B are isosceles trapezoid bosses (as shown in fig. 16) or arc bosses or triangular bosses (as shown in fig. 16A); one ends of the first transition boss 730-731B and the second transition boss 731-732B are respectively connected to the second limiting wall 74-0B.

Preferably, as shown in fig. 16, the guide rail 7 further includes two stroke limiting platforms 76B respectively disposed at two ends thereof, and the two stroke limiting platforms 76B are respectively in limit engagement with the locking plate 31B, so as to prevent the guide rail 7B from being excessively moved relative to the locking plate 31B, and thus, the guide rail 7B and the locking plate 31B are prevented from being separated from each other.

Preferably, as shown in fig. 13A, the locking structure further comprises first locking springs 30-31B having one end connected to the locking plate 31B and the other end fixedly disposed, and the first locking springs 30-31B apply force to the locking plate 31 to urge the locking plate 31B toward the guide rail 7B. Further, as shown in fig. 13A, the locking plate 31B includes a locking plate body 31-0B and a first locking end 31-1B provided at one end of the locking plate body 31-0B, a locking plate rail escape groove 31-2B is provided at a connection of the first locking end 31-1B and the locking plate body 31-0B, the rail passes through the locking plate rail escape groove 31-2B, and the first locking spring 30-31B inclines the locking plate 31B toward the rail 7B.

Specifically, as shown in fig. 13A, the first locking end 31-1B is provided at the upper portion of the left end of the locking plate main body 31-0B, the locking plate rail escape groove 31-2B is provided below the first locking end 31-1B and on the left side of the locking plate main body 31-0B, and the first locking spring 30-31B applies pressure to the locking plate 31B to incline it downward to the left (in the direction of the rail 7B).

Preferably, as shown in fig. 2, 4, and 13A-13D, the locking plate assembly 3B further includes a second mounting plate 30B disposed parallel to the locking plate 31B and fixedly disposed on the drawer base bottom plate 3A, and the locking plate 31B is movably connected to the second mounting plate 30B through a first connection limiting structure. Further, as shown in fig. 13A and 14, the first connection limiting structure includes a first lock plate limiting shaft 302B and a second lock plate limiting shaft 303B provided on the second mounting plate 30B, respectively, and a first lock plate kidney-shaped hole 312B and a second lock plate kidney-shaped hole 313B provided on the lock plate 31B, respectively; the first lock plate limit shaft 302B and the second lock plate limit shaft 303B are respectively fitted with a first lock plate kidney-shaped hole 312B and a second lock plate kidney-shaped hole 313B. Further, as shown in fig. 13A to 13D, both ends of the first locking spring 30 to 31B are connected to the locking plate 31B and the second mounting plate 30B, respectively, and one end of the first locking spring 30 to 31B is preferably connected to a lower left corner of the locking plate body 31-0B of the locking plate 31B.

Specifically, as shown in fig. 14, the first locking plate limiting shaft 302B and the second locking plate limiting shaft 303B are disposed in parallel at an interval on one side of the second mounting plate 30B, and both are vertically connected to the second mounting plate 30B, the first locking plate limiting shaft 302B is disposed in the middle of the second mounting plate 30B, the second locking plate limiting shaft 303B is disposed at one end of the second mounting plate 30B away from the guide rail 7B, the middle of the second mounting plate 30B is further provided with a second mounting plate lead screw avoiding hole 300B for the lead screw 4B to pass through, the first locking plate limiting shaft 302B is disposed on one side of the second mounting plate lead screw avoiding hole 300B, the second mounting plate 30B further includes a first locking spring limiting column 307-1B, which is disposed at both ends of the second mounting plate 30B with the second locking plate limiting shaft 303B, respectively, the first locking plate limiting shaft 302B, the second locking plate limiting shaft 303B, and the first locking spring limiting column 307-1B are disposed at three vertices of a triangle, the first locking plate limiting shaft 302B, the second locking plate limiting shaft 303B and the first locking spring limiting column 307-1B are distributed on the periphery of the second mounting plate screw rod avoidance hole 300B; as shown in fig. 13A, a first locking plate kidney-shaped hole 312B, a second locking plate kidney-shaped hole 313B and a first locking plate spring limiting hole 314B are arranged on a locking plate body 31-0B of the locking plate 31B, the first locking plate kidney-shaped hole 312B, the second locking plate kidney-shaped hole 313B and the first locking plate spring limiting hole 314B are located at three vertices of a triangle, a locking plate lead screw avoiding hole 310B is further arranged in the middle of the locking plate body 31-0B, and the first locking plate kidney-shaped hole 312B, the second locking plate kidney-shaped hole 313B and the first locking plate spring limiting hole 314B are distributed on the periphery; the two ends of the first locking spring 30-31B are respectively connected with the first locking spring limiting column 307-1B and the first locking plate spring limiting hole 314B.

Preferably, as shown in fig. 2 and 4, the sliding plate 1B, the first mounting plate 2B, the locking plate 31B and the second mounting plate 30B are sequentially arranged on the drawer base bottom plate 3A; the slide attachment plate 10B, the first mounting plate 2B, the lock plate 31B, and the second mounting plate 30B of the slide 1B are arranged in parallel with each other. Further, lead screw 4B passes slide 1B, first mounting panel 2B (the first mounting panel lead screw that first mounting panel 2B middle part set up dodges the hole), lockplate 31B (the lockplate lead screw dodges hole 310B) and second mounting panel 30B (the second mounting panel lead screw dodges hole 300B) in proper order, and guide rail 7B sets up in lead screw 4B one side rather than parallel arrangement, and electric actuator sets up the opposite side at lead screw 4B, makes the structure of drawer seat 1 compacter. Specifically, as shown in fig. 2, the electric device and the guide rail 7B are disposed on the left and right sides of the screw rod 4B.

Preferably, as shown in fig. 15, the locking plate 31B is locked with the lead screw 4B.

As shown in fig. 15, a locking plate lead screw locking protrusion 3100B is disposed at one end of the locking plate lead screw avoiding hole 310B; the lead screw 4B includes a plurality of lead screw locking grooves 42B provided thereon; the screw 4B is inserted into the locking plate screw avoiding hole 310B, and when the locking plate 31B locks the guide rail 7B, the locking plate screw locking protrusion 3100B is simultaneously inserted into the screw locking groove 42B to lock the screw 4B.

Preferably, as shown in fig. 16, 18 and 20, a connection of the guide rail 7B to the slide board 1B is provided.

As shown in fig. 16, the guide rail 7B further includes a guide rail connecting portion 71-72B disposed at one end thereof and having a T-shaped structure, the guide rail connecting portion 71-72B includes a guide rail connecting portion limiting arm 71B and a guide rail connecting portion connecting arm 72B, one end of the guide rail connecting portion connecting arm 72B is connected to a middle portion of the guide rail connecting portion limiting arm 71B at a right angle, and the other end is connected to a guide rail main body 70B of the guide rail 7B; as shown in fig. 20, the sliding plate 1B is of an L-shaped structure, and includes a sliding plate base plate 11B and a sliding plate connecting plate 10B which are connected in a bent manner, the sliding plate base plate 11B is arranged in parallel with the drawer base bottom plate 3A, and the sliding plate connecting plate 10B is provided with a sliding plate guide rail connecting hole 101B; as shown in fig. 18, the second mounting plate 30B includes a second mounting plate rail retaining hole 305B. Referring to fig. 16, 18 and 20, after the rail connecting portion limiting arm 71B passes through the slide rail connecting hole 101B, the rail 7B is rotated to make the rail connecting portion limiting arm 71B in limiting fit with the peripheral side wall of the slide rail connecting hole 101B, and the other end of the rail 7B is inserted into the second mounting plate rail limiting hole 305 to be in limiting fit therewith, so as to prevent the rail 7B from rotating.

Preferably, as shown in fig. 3 to 8, the drawer base 1 further includes a locking reset structure for releasing the locking relationship between the locking plate 31B and the guide rail 7B and the lead screw 4B.

As shown in fig. 4-6, a first embodiment of the lock reset mechanism is shown: the locking reset structure comprises a reset rotating shaft 90B and a reset operating handle 91B, two ends of the reset rotating shaft 90B are respectively connected with the locking plate 31B and the reset operating handle 91B in a driving mode, the reset operating handle 91B is pulled to drive the reset rotating shaft 90B to axially rotate, the reset rotating shaft 90B drives the locking plate 31B to move, the locking plate 31B is made to move out of a locking groove and is in limit fit with a second limit wall 74-0B, and meanwhile, a locking plate lead screw locking protrusion 3100B is made to move out of a lead screw positioning groove 43B. Further, as shown in fig. 4, the reset rotating shaft 90B includes a reset rotating shaft main body rotatably disposed and two reset rotating shaft toggle arms respectively disposed at two ends of the reset rotating shaft main body, and the reset rotating shaft toggle arms are in an L-shaped structure and include toggle arm connecting portions vertically connected to the reset rotating shaft main body and toggle arm transmission portions parallel to the reset rotating shaft main body; the reset operation handle 91B comprises a reset operation handle main board 91-1B, and a reset operation handle driving part 91-3B and a reset operation handle 91-2B which are respectively arranged at two sides of the reset operation handle main board 91-1B, wherein the middle part of the reset operation handle driving part 91-3B is provided with a waist-shaped reset operation handle driving groove 91-30B which is matched with the poking arm transmission part in a driving way. Further, as shown in fig. 14, the second mounting plate 30B includes a second mounting plate return shaft hole 301B, and as shown in fig. 13A, the lock plate 31B includes a lock plate return shaft hole 311-1B; the second mounting plate resetting rotating shaft hole 301B is an arc-shaped hole, the locking plate resetting rotating shaft hole 311-1B is a waist-shaped hole, and the shifting arm transmission part of the resetting rotating shaft shifting arm of the resetting rotating shaft 90B passes through the second mounting plate resetting rotating shaft hole 301B to be in driving fit with the locking plate resetting rotating shaft hole 311-1B, so that the locking plate 31B is driven to move horizontally.

Preferably, as shown in fig. 2 and 3, the drawer base 1 further includes a drawer base panel 5A disposed at one end of the drawer base bottom plate 3A and fixedly connected to the drawer base panel, the reset operation handle main plate 91-1B is slidably disposed on the drawer base panel 5A, the drawer base panel 5A includes a panel padlock handle 51A disposed thereon, and when the locking plate 31B locks the guide rail 7B and the screw rod 4B, the reset lever padlock handle 91-2B and the panel padlock handle 51A are in close proximity, the reset lever padlock handle 91-2B and panel padlock handle 51A are locked together by lock 92B, preventing the reset lever 91B from moving, so that the locking plate 31B holds the locking guide rail 7B and the lead screw 4B, thereby preventing unexpected unlocking operations (e.g., misoperation of a user, illegal operation of a person concerned, or the like) and ensuring the power safety of the user.

As shown in fig. 7 and 8, a second embodiment of the lock reset mechanism is shown: the locking reset structure comprises a reset button member 93B, a reset button member reset spring 94B and a reset connecting rod 95B, wherein the middle part of the reset connecting rod 95B is rotatably arranged, and two ends of the reset connecting rod are respectively connected with the reset button member 93B and the locking plate 31B in a driving way; when the reset button 93B is pressed, one end of the reset link 95B is driven to swing, the other end of the reset link 95B drives the lock plate 31B to move and reset, the lock on the guide rail 7B and the screw rod 4B is released, and the reset button reset spring 94B drives the reset button 93B to reset. Further, as shown in fig. 7 and 8, the reset button part reset spring 94B is sleeved on the screw rod 4B, and the reset button part 93B is arranged on one side of the screw rod 4B and is parallel to the screw rod; the drawer base 1 further comprises a drawer base panel 5A which is arranged at one end of the drawer base bottom plate 3A and fixedly connected with the drawer base bottom plate, and the reset button 93B is arranged on the drawer base panel 5A in a sliding mode. Further, the reset button 93B includes a reset button driving waist-shaped hole, one end of the reset connecting rod 95B is provided with a reset connecting rod driven shaft matched with the reset button driving waist-shaped hole, the other end of the reset connecting rod 95B is provided with a reset connecting rod driving waist-shaped hole, and the locking plate 31B is provided with a reset driven shaft matched with the reset connecting rod driving waist-shaped hole.

As shown in fig. 3, a third embodiment of the lock reset mechanism is shown: the locking reset structure comprises an unlocking electromagnet 2C arranged on the bottom plate 3A of the drawer seat, the unlocking electromagnet 2C is arranged on one side of the locking plate 31B and is connected with the locking plate in a driving mode, and the remote control of the movement reset of the locking plate 31B is achieved. Specifically, the unlocking electromagnet 2C includes a push rod, and the push rod is connected with the locking plate 31B in a driving manner.

Preferably, as shown in fig. 4 and 23, the circuit breaker of the present invention further includes an indication structure for indicating the position of the circuit breaker body 2.

As shown in fig. 4 and 23, the indicating structure comprises an indicating piece 8B rotatably arranged on the drawer base 1, and the guide rail 7B is in driving connection with the indicating piece 8B; when the sliding plate 1B slides back and forth to drive the circuit breaker body 2 to switch between the separation position, the test position and the connection position, the guide rail 7B drives the indicator 8B to rotate to indicate the position of the circuit breaker body 2.

As shown in fig. 4, a first embodiment of the indicator 8B: the indicating piece 8B is of a cylindrical structure, the guide rail 7B is connected with the indicating piece 8B in a driving mode through a transmission connecting rod 7-8B, and the indicating piece 8B is driven to axially rotate.

Preferably, the indicating piece 8B is rotatably arranged on the drawer seat bottom plate 3A of the drawer seat 1, and an indicating piece reset torsion spring is arranged between the indicating piece 8B and the drawer seat bottom plate 3A.

Preferably, as shown in fig. 4, three marks corresponding to the separation position, the test position and the connection position are provided on the circumferential side of the indicator 8B, and the marks include at least one of a character mark, a symbol mark and a color mark. Further, as shown in fig. 4, the drawer base 1 further includes a drawer base panel 5A, and a status indication hole 52A for observing the identifier is formed in the drawer base panel 5A.

Preferably, as shown in fig. 4 and 16, the guide rail 7B includes a guide rail indicator driving part 75B provided at one end thereof, and the guide rail indicator driving part 75B is provided with a guide rail indicator driving part coupling hole 750B to be coupled to one end of the transmission link 7-8B. Specifically, the two ends of the guide rail 7B are respectively provided with guide rail connecting parts 71-72B and a guide rail indicator driving part 75B.

As shown in fig. 23, a second embodiment of the indicator 8B: the drawer base panel 5A is provided with an indicating piece mounting hole, and the indicating piece 8B is of a cylindrical structure and is rotatably arranged in the indicating piece mounting hole; the guide rail 7B is connected with an indicating piece 8B in a driving mode through a flexible connecting piece, and an indicating piece reset torsion spring is arranged between the indicating piece 8B and the drawer seat panel 5A. Further, the flexible connector is a steel wire or a nylon cord, and the indicator 8B includes an indicator capstan for winding the flexible connector.

Preferably, as shown in fig. 23, an indication arrow is disposed on a side of the indication member 8B facing the operator, three marks corresponding to the separation position, the test position, and the connection position are disposed on the drawer base panel 5A, and the indication arrow is matched with the three marks to indicate a position of the circuit breaker body 2. Specifically, when the guide rail 7 is driven to move by an external force (driven by the sliding plate 1B), the driving indicator 8B rotates, the indicator arrow rotates along with the indicator 8B, and when the circuit breaker body 2 reaches a certain position, the indicator arrow indicates the pointed mark, that is, the current position of the circuit breaker body 2.

Fig. 17A to 19 show a second embodiment of the circuit breaker of the present invention.

The circuit breaker of this embodiment is different from the first embodiment in that: the present embodiment adopts a second embodiment of the locking structure, specifically, as shown in fig. 17A to 19, the locking plate assembly 3B includes a locking plate 31B and a locking hook 32B, the locking hook 32B is disposed on the locking plate 31B and can only move one-dimensionally relative to the locking plate 31B, the locking plate 31B is perpendicular to the moving direction of the guide rail 7B, and the locking hook 32B is in limit fit with the locking groove to lock the guide rail 7B; the guide rail 7B further comprises a first transition boss 730-731B disposed between the first locking groove 730B and the second locking groove 731B and a second transition boss 731-732B disposed between the second locking groove 731B and the third locking groove 732B; when the locking hook 32B is in limit fit with a locking groove, the locking plate 31B moves and resets under the action of external force, and after the locking plate 31B drives the locking hook 32B to move out of the locking groove, the locking hook 32B moves towards the first direction relative to the locking plate 31B and is in limit fit with the side wall of the guide rail 7B; the guide rail 7B moves relative to the locking plate 31B, the first transition boss 730-. Further, as shown in fig. 17A to 17D, the lock plate 31B can only move up and down with respect to the lock plate 31B; the locking plate 31B is moved and reset under the action of external force, after the locking plate 31B drives the locking hook 32B to move out of the locking groove, the locking hook 32B moves downwards relative to the locking plate 31B to move to a position where the lower end of the locking hook 32B crosses the bottom wall of the locking groove and is in limit fit with the side wall of the guide rail 7B; the first transition boss 730-731B or the second transition boss 731-732B drives the locking hook 32B to move upward relative to the locking plate 31B until the lower end of the locking hook 32B is not lower than the bottom wall of the locking groove.

Specifically, when the locking hook 32B is in limit fit with a locking groove (for example, the second locking groove 731B), the locking plate 31B is moved (moved leftward) to reset under the action of external force, and after the locking plate 31B drives the locking hook 32B to move out of the locking groove, the locking hook 32B moves downward relative to the locking plate 31B until the lower end of the locking hook 32B crosses the bottom surface of the locking groove and is in limit fit with the side wall of the guide rail 7B, and the state shown in fig. 17A is entered; as shown in fig. 17B, the guide rail 7B moves forward relative to the locking plate 31B, the second transition projection 731B 732B drives the locking hook 32B to move upward relative to the locking plate 31B (if the guide rail 7B moves backward relative to the locking plate 31B, the first transition projection 730B 731B drives the locking hook 32B to move upward relative to the locking plate 31) until the lower end of the locking hook 32B is not lower than the bottom surface of the locking groove, when the locking hook 32B faces another locking groove (as shown in fig. 17C, the third locking groove 732B), the locking plate 31B drives the locking hook 32B to move rightwards, so that the locking hook 32B is inserted into the locking groove, and enters the state shown in fig. 17D, at this time, the guide rail 7B is locked, and if the guide rail 7B needs to be unlocked, external force is only required to be applied to the locking plate 31B, so that the locking plate 31 and the locking hook 32B move leftwards, and the locking hook 32B moves downwards after moving out of the locking groove and is in limit fit with the side wall of the guide rail 7B.

Preferably, as shown in fig. 19, the first locking groove 730B, the first transition boss 730-. Further, the first transition boss 730-731B and the second transition boss 731-732B are isosceles trapezoid bosses or arc bosses.

Preferably, as shown in fig. 18, the locking hook 32B includes a locking hook mounting part 320B and a locking hook locking part 321B, the locking hook locking part 321B being provided at a lower end of the locking hook mounting part 320B; the locking hook locking part 321B is in limit fit with the locking groove, and the first transition boss 730-731B or the second transition boss 731-732 drives the locking hook 32B to move upwards relative to the locking plate 31B through the locking hook mounting part 320B. Further, as shown in fig. 18, the locking plate 31B includes a locking plate body 31-0B and a locking plate hook mounting portion 31-3B provided at one end of the locking plate body 31-0B, a connection of the locking plate body 31-0B and the locking plate hook mounting portion 31-3B forms a locking plate guide rail escape groove 31-2B for escaping the guide rail 7B, the guide rail 7B passes through the locking plate guide rail escape groove 31-2B, and the locking plate hook mounting portion 31-3B and the locking hook 32B are located on an upper side of the guide rail 7B. Further, as shown in fig. 18, the locking plate 31B further includes a locking plate hook limiting part 316-1B connected to one end of the locking plate hook mounting part 31-3B in a bent manner, and a locking plate hook mounting shaft 311-2B provided on the locking plate hook mounting part 31-3B, wherein the locking plate hook limiting part 316-1B and the locking plate body 31-0B are respectively connected to two ends of the locking plate hook mounting part 31-3B; the locking plate hook limiting part 316-1B is in limiting fit with the locking hook mounting part 320B; the locking hook 32B comprises a locking hook waist-shaped hole 323B arranged on the locking hook mounting part 320B, and the locking hook 32B is mounted on the locking plate hook mounting shaft 311-2B through the locking hook waist-shaped hole 323B and is in limit fit with the locking plate hook limiting part 316-1B; the width of the locking hook waist-shaped hole 323B is matched with the outer diameter of the locking plate hook mounting shaft 311-2B, and the length of the locking hook waist-shaped hole 323B is larger than the outer diameter of the locking plate hook mounting shaft 311-2B, so that the locking hook 32B can smoothly move up and down relative to the locking plate 31B.

Specifically, as shown in fig. 18, the locking plate hook limiting part 316-1B and the locking plate body 31-0B are respectively located at the left and right ends of the locking plate hook mounting part 31-3B, the locking plate hook limiting part 316-1B is connected with the locking plate hook mounting part 31-3B at a right angle, the locking plate hook mounting part 31-3B is located at the upper left corner of the locking plate body 31-0, and the locking plate guide rail avoiding groove 31-2B is located below the locking plate hook mounting part 31-3B and at the left side of the locking plate body 31-0B; the locking hook locking part 321B is located on the left side of the lower end of the locking hook mounting part 320B.

Preferably, as shown in fig. 18, the locking plate assembly 3B further includes a second mounting plate 30B fixedly disposed on the drawer base plate 3A and disposed in parallel with the locking plate 31B, the locking plate 31B is connected to the second mounting plate 30B by a first connection limiting structure, and the locking plate 31B is only horizontally movable with respect to the second mounting plate 30B. Further, as shown in fig. 18, the first connection limiting structure includes a first lock plate limiting shaft 302B and a second lock plate limiting shaft 303B provided on the second mounting plate 30B, respectively, and a first lock plate kidney-shaped hole 312B and a second lock plate kidney-shaped hole 313B provided on the lock plate 31B, respectively; the first lock plate kidney-shaped hole 312B and the second lock plate kidney-shaped hole 313B are respectively engaged with the first lock plate stopper shaft 302B and the second lock plate stopper shaft 303B. Further, as shown in fig. 18, the second mounting plate 30B is further provided with a second mounting plate reset rotating shaft hole 301B, a second mounting plate screw rod avoiding hole 300B, a second mounting plate guide rail limiting hole 305B and a second mounting plate locking spring limiting protrusion 307-2B; the locking plate 31B is further provided with a locking plate reset rotating shaft hole 311-1B (not shown in the figure), a locking plate lead screw avoiding hole 310B, a first locking plate spring limiting hole 314B and a spring limiting protrusion avoiding groove 315B.

Specifically, as shown in fig. 18, the second locking plate limiting shaft 303B and the second mounting plate lead screw avoiding hole 300B are disposed in the middle of the second mounting plate 30B, the second locking plate limiting shaft 303B is disposed below the second mounting plate lead screw avoiding hole 300B, the second mounting plate guide rail limiting hole 305B and the second mounting plate locking spring limiting projection 307-2B are disposed at the left and right ends of the second mounting plate 30B, respectively, the second mounting plate reset rotating shaft hole 301B is disposed between the second mounting plate guide rail limiting hole 305B and the second mounting plate lead screw avoiding hole 300B, and is positioned above the second mounting plate guide rail clearance hole 305B and the second mounting plate lead screw relief hole 300B, the first locking plate clearance shaft 302B is positioned between the second mounting plate lead screw relief hole 300B and the second mounting plate locking spring clearance projection 307-2B, the lead screw avoidance hole 300B of the second mounting plate and the limiting bulge 307-2B of the locking spring of the second mounting plate are arranged above; the locking plate screw avoiding hole 310B and the second locking plate waist-shaped hole 313B are located in the middle of the locking plate main body 31-0B, the second locking plate waist-shaped hole 313B is located below the locking plate screw avoiding hole 310B, the spring limiting protrusion avoiding groove 315B is located at the right end of the locking plate main body 31-0B and used for avoiding the second mounting plate locking spring limiting protrusion 307-2B, the first locking plate spring limiting hole 314B is arranged between the locking plate screw avoiding hole 310B and the spring limiting protrusion avoiding groove 315B, the first locking plate waist-shaped hole 312B is located above the spring limiting protrusion avoiding groove 315B, and the locking plate resetting rotating shaft hole 311-1B is located on the upper portion of the left end of the locking plate main body 31-0B.

Preferably, as shown in fig. 17A to 17D, the locking structure further comprises first locking springs 30 to 31B, and both ends of the first locking springs 30 to 31B are connected to the second mounting plate 30B and the locking plate 31B of the locking plate assembly 3B, respectively. Further, two ends of the first locking spring 30-31B are respectively connected with the first locking plate spring limiting hole 314B and the second mounting plate locking spring limiting protrusion 307-2B.

Note that, as shown in fig. 18, the latching plate 31B may be provided with a latching plate reset shaft instead of the latching plate reset shaft hole 311-1B, the latching plate reset shaft is provided with a latching plate reset shaft fitting hole in the middle, the latching plate reset shaft passes through the second mounting plate reset shaft hole 301B, and the latching plate reset shaft fitting hole is fitted with the latching reset structure.

It should be noted that: as shown in fig. 17A, when the locking reset structure unlocks the locking plate assembly 3B, the guide rail 7B and the lead screw 4B, the locking reset structure drives the locking plate 31B to move horizontally, and the locking plate 31B drives the locking hook 32B to move out of the locking groove and to be in limit fit with the side wall of the guide rail 7B.

Fig. 21A-22B show a third embodiment of the circuit breaker of the present invention.

The circuit breaker of this embodiment is different from the first embodiment in that: the present embodiment adopts a third embodiment of the locking structure, specifically, as shown in fig. 21A-22B, the locking plate assembly 3B includes a locking plate 31B and an unlocking plate 33B, the unlocking plate 33B is disposed on the locking plate 31B and movably connected therewith, the locking plate 31B is perpendicular to the moving direction of the guide rail 7B, and the locking plate 31B is in limit fit with the locking groove to lock the guide rail 7B; the unlocking plate 33B comprises an unlocking hook 331B, and the locking plate 31B comprises a locking plate hook 316-2B; the guide rail 7B further includes a first unlocking groove 750B provided between the first locking groove 730B and the second locking groove 731B, and a second unlocking groove 751B provided between the second locking groove 731B and the third locking groove 732B; when the locking plate 31B locks the guide rail 7B, the locking plate hook 316-2B is in limit fit with one locking groove, the unlocking hook 331B is located on the first side of the guide rail 7B, the locking plate 31B is moved to reset by external force, the locking plate 31B drives the locking plate hook 316-2B and the unlocking hook 331B to move to the second side of the guide rail 7B, the unlocking hook 331B is in limit fit with the guide rail 7B, the guide rail 7B moves relative to the locking plate 31B, the unlocking hook 331B is in limit fit with the guide rail 7B from the first unlocking groove 750B or the second unlocking groove 751B or the locking groove and moves to the first side of the guide rail 7B, the locking plate hook 316-2B is in limit fit with the guide rail 7B, and when the locking plate hook 316-2B is opposite to the other locking groove, the locking plate hook 316-2B is inserted into the locking. Further, as shown in fig. 21A-22A, the first and second unlocking grooves 750B and 751B have a depth smaller than that of the locking grooves; the lower end of the locking plate hook 316-2B protrudes below the lower end of the unlocking hook 331B.

Preferably, as shown in fig. 22B, when the unlocking hook 331B is in limit fit with the guide rail 7B, a gap exists between the locking plate hook 316-2B and the guide rail 7B, which is beneficial to reducing resistance when the guide rail 7B slides relative to the locking plate 31B.

Specifically, when the locking plate 31B is in limit fit with the second locking groove 731B to lock the guide rail 7B, the unlocking hook 331B is located on the left side of the guide rail 7B (the first side of the guide rail 7B), the external force causes the locking plate 31B to move rightwards to reset, the locking plate 31B drives the locking plate hook 316-2B and the unlocking hook 331B to move to the right side of the guide rail 7B (the second side of the guide rail 7B), the unlocking hook 331B is in limit fit with the guide rail 7B, and the state shown in fig. 21A is entered; as shown in fig. 21B, the guide rail 7B moves backward relative to the locking plate 31B, when the unlocking hook 331B is opposite to the first unlocking groove 750B, the unlocking hook 331B moves from the first unlocking groove 750B to the left side of the guide rail 7B to release the limit fit with the guide rail 7B (when the guide rail 7B moves forward relative to the locking plate 31B, the unlocking hook 331B moves from the second locking groove 731B to the left side of the guide rail 7B to release the limit fit with the guide rail 7B), so that the locking plate hook 316-2B is in limit fit with the guide rail 7B; as shown in fig. 21C, the guide rail 7B continues to move backward relative to the locking plate 31B until the locking plate hook 316-2B is opposite to the first locking groove 730B, and the locking plate 31B drives the locking plate hook 316-2B to be inserted into the first locking groove 730B; as shown in fig. 21D, when it is necessary to unlock the guide rail 7B again, an external force is applied to the lock plate 31B, and the lock plate 31B and the unlock plate 33B are moved rightward until both the lock plate hook 316-2B and the unlock hook 331B move to the right side of the guide rail 7B, and the unlock hook 331B is in limit-engagement with the guide rail 7B.

Preferably, as shown in fig. 21D, the locking plate assembly 3B further includes a first locking spring 30-31B and a second unlocking spring 30-33B; one end of the first locking spring 30-31B is connected with the locking plate 31B, and the other end is fixedly arranged; one end of the first unlocking spring 30-33B is connected with the unlocking plate 33B, and the other end is fixedly arranged; the unlocking plate 33B can move horizontally and rotate relative to the locking plate 31B. Further, as shown in fig. 21D, the first locking springs 30 to 31B apply a pulling force to the locking plate 31B toward the left side; the first unlocking springs 30 to 33B apply a pulling force to the unlocking plate 33B so as to be directed to the left. Further, as shown in fig. 21D, both ends of the first locking spring 30-31B are connected to the locking plate 31B and the second mounting plate 30B, respectively; two ends of the first unlocking spring 30-33B are respectively connected with the unlocking plate 33B and the second mounting plate 30B.

Preferably, as shown in fig. 22B, one side of the unlocking hook 331B is used for limiting and matching with the guide rail 7B, and the lower end of the other side is provided with a chamfer structure, so that resistance of the unlocking hook 33B when moving from the first side of the guide rail 7B to the second side of the guide rail 7B is reduced.

Preferably, as shown in fig. 22A, the locking plate 31B comprises a locking plate body 31-0B and a locking plate hook 316-2B arranged at one end of the locking plate body 31-0B, and a locking plate guide rail avoiding groove 31-2B is arranged at the joint of the locking plate body 31-0B and the locking plate hook 316-2B; the unlocking plate 33B comprises an unlocking plate main body 330B and an unlocking hook 331B arranged at one end of the unlocking plate main body 330B; the guide rail 7B passes through the locking plate guide rail avoidance groove 31-2B, and the locking plate hook 316-2B and the unlocking plate 33B are positioned on the upper side of the guide rail 7B. Further, the locking plate 31B further includes an unlocking plate limiting boss 318B, the unlocking plate limiting boss 318B is located on the lower side of the unlocking plate 33B and is in limiting fit with the unlocking plate 33B, and the first unlocking springs 30-33B enable the unlocking plate 33B to abut against the unlocking plate limiting boss 318B. Specifically, as shown in fig. 22A, the locking plate hook 316-2B is disposed at the upper portion of the right end of the locking plate body 31-0B, and the locking plate rail escape slot 31-2B is located at the right side of the locking plate body 31-0B and below the locking plate hook 316-2B; the unlocking plate 33B is arranged at the upper part of the right end of the locking plate body 31-0B, and the unlocking hook 331B is arranged at the lower part of the right end of the unlocking plate body 330B.

Preferably, as shown in fig. 22A, the locking plate assembly 3B further includes a second mounting plate 30B fixedly disposed on the drawer base plate 3A and disposed parallel to the locking plate 31B, and the locking plate 31B is movably connected to the second mounting plate 30B through a first connection limiting structure. Further, as shown in fig. 22A, the first connection limiting structure includes a first lock plate limiting shaft 302B and a second lock plate limiting shaft 303B provided on the second mounting plate 30B, respectively, and a first lock plate kidney-shaped hole 312B and a second lock plate kidney-shaped hole 313B provided on the lock plate 31B, respectively; the first lock plate kidney-shaped hole 312B and the second lock plate kidney-shaped hole 313B are respectively engaged with the first lock plate stopper shaft 302B and the second lock plate stopper shaft 303B. Further, as shown in fig. 22A, the lock plate 30B is horizontally movable relative to the second mounting plate 30B. Further, as shown in fig. 22A, the second mounting plate 30B is further provided with a second mounting plate reset rotating shaft hole 301B, a second mounting plate screw rod avoiding hole 300B, a second mounting plate guide rail limiting hole 305B and a third mounting plate locking spring limiting protrusion 307-3B; the locking plate 31B is also provided with a locking plate resetting rotating shaft hole 311-1B (not shown in the figure), a locking plate screw rod avoiding hole 310B, a first locking plate spring limiting column 314-1B, a spring limiting protrusion avoiding groove 315B and an unlocking plate mounting shaft 317B; the unlocking plate 33B includes an unlocking plate main body 330B, an unlocking plate shaft hole 333B, an unlocking plate spring limit hole 334B, and an unlocking hook 331B.

Specifically, as shown in fig. 22A, the second mounting plate lead screw avoidance hole 300B is disposed in the middle of the second mounting plate 30B, the first locking plate limiting shaft 302B and the third mounting plate locking spring limiting protrusion 307-3B are disposed at the left end of the second mounting plate 30B, the second mounting plate reset rotation shaft hole 301B, the second locking plate limiting shaft 303B and the second mounting plate guide rail limiting hole 305B are disposed at the right end of the second mounting plate 30B, the second mounting plate reset rotation shaft hole 301B is disposed between the second mounting plate lead screw avoidance hole 300B and the second mounting plate guide rail limiting hole 305B, and the second locking plate limiting shaft 303B is disposed below the second mounting plate guide rail limiting hole 305B. Further, as shown in fig. 22A, the second mounting plate rail limiting hole 305B is an L-shaped hole.

Specifically, as shown in fig. 22A, the locking plate lead screw avoiding hole 310B is provided in the middle of the locking plate 31B, the first locking plate spring stopper post 314-1B and the spring stopper protrusion avoiding groove 315B are provided at the left end of the locking plate main body 31-0B, the first locking plate spring stopper post 314-1B is provided between the spring stopper protrusion avoiding groove 315B and the locking plate lead screw avoiding hole 310B, the first locking plate kidney-shaped hole 312B is provided above the first locking plate spring stopper post 314-1B and the spring stopper protrusion avoiding groove 315B, the locking plate hook 316-2B is provided at the upper end of the locking plate main body 31-0B, and the unlocking plate stopper boss 318B is provided at the right side of the locking plate lead screw avoiding hole 310B and below the unlocking plate mounting shaft 317B.

Specifically, as shown in fig. 22A, the unlocking plate shaft hole 333B is located in the middle of the unlocking plate main body 330B, the unlocking plate spring limiting hole 334B is disposed at the lower left corner of the unlocking plate main body 330B, and the unlocking hook 331B is located at the lower right corner of the unlocking plate main body 330B.

Preferably, as shown in fig. 22, the guide rail 7B has an L-shaped cross section, and includes a guide rail locking portion 70-1B and a guide rail limiting portion 70-0B connected by bending, and a locking groove, a first unlocking groove 750B and a second unlocking groove 751B are provided on the guide rail locking portion 70-1.

It should be noted that, as shown in fig. 21A, when the locking reset structure releases the locking relationship between the locking plate assembly 3B and the guide rail 7B and the lead screw 4B, the locking reset structure drives the locking plate 31B to move horizontally, and the locking plate 31B drives the locking plate hook 316-2 to move out of the locking groove and make the unlocking hook 331B engage with the side wall of the guide rail 7B in a limiting manner.

As shown in fig. 24-30, the circuit breaker of the present invention is a fourth embodiment.

As shown in fig. 24, the circuit breaker of the present embodiment further includes a first switch serially connected to the power supply circuit of the motor 5B, and when the circuit breaker body 2 is located at the connection position, the circuit breaker body 2 is closed and drives the first switch to operate, thereby disconnecting the power supply circuit of the motor 5B. Further, as shown in fig. 25 to 28A, the circuit breaker body 2 includes an energy storage operating mechanism, the energy storage operating mechanism includes a rotating shaft assembly 1D connected to the moving contact of the circuit breaker body 2 in a driving manner, and the rotating shaft assembly 1D is in driving fit with the first switch element.

It should be noted that the rotating shaft assembly 1D is a structure directly connected to the moving contact of the circuit breaker body 2 in a driving manner, and the axial rotation thereof can drive the moving contact to move and drive the circuit breaker body 2 to close/open, which is different from a main shaft (cam shaft) of the energy storage operating mechanism for completing energy storage. In addition, other mechanisms of the stored energy operating mechanism may also drive the first switch member.

Preferably, as shown in fig. 25 to 28A, the rotating shaft assembly 1D includes a rotating shaft 10D, a switch driving arm 12D and a switch driving shaft 13D, one end of the switch driving arm 12D is connected to the rotating shaft 10D, and the other end is provided with the switch driving shaft 13D; the drawer seat 1 further comprises two drawer seat side plates which are oppositely arranged and respectively arranged at two ends of the drawer seat bottom plate 3A, namely a first side plate 1A and a second side plate 2A; the drawer base 1 further comprises a first lever 20D which is rotatably arranged on any drawer base side plate, and when the circuit breaker body 2 is located at the connection position, the switch driving shaft 13D is in driving connection with the first lever 20D; the first switch piece is arranged on the side plate of the drawer base, located on one side of the first lever 20D and in driving fit with the first lever, when the breaker body 2 is located at a connection position and switched on, the rotating shaft 1D rotates and drives the switch driving arm 12D to swing, the switch driving arm 12D drives the first lever 20D to swing through the switch driving shaft 13D, and the first lever 20D drives the first switch piece to move to disconnect a power supply circuit of the motor 5B. Further, as shown in fig. 28A, the middle of the first lever 20D is rotatably disposed through the first lever rotating shaft 21D, and a first lever matching groove 23D is formed at one end of the first lever 20D, so that when the circuit breaker body 2 moves to the connection position, the switch driving shaft 13D enters the first lever matching groove 23D to be in driving matching therewith. Further, the drawer base further comprises a first lever return spring 7D and a first lever limiting column 90D arranged on the side plate of the drawer base, and the first lever return spring 7D is connected with one end of the first lever 20D, so that the other end of the first lever 20D is in limiting fit with the first lever limiting column 90D.

Specifically, as shown in fig. 28A, the first switch member is a normally closed microswitch SS1, P1, P2 and P4 are preferred setting positions of the microswitch SS1, when the microswitch SS1 is located at P2 or P4, the microswitch cooperates with the left end of the first lever 20D, and when the microswitch is located at P1, the microswitch cooperates with the right end of the first lever 20D; when the microswitch SS1 is kept closed, the power supply circuit of the motor 5A is kept open, and when the microswitch SS1 is triggered by the first lever 20D, it is switched off, thereby disconnecting the power supply circuit of the motor 5A.

Preferably, as shown in fig. 27 to 29, the drawer base 1 further includes a screw rod baffle 6D, the screw rod baffle 6D includes a handle insertion hole 62D formed therein, and the handle insertion hole 62D is disposed in a staggered manner with one end of the screw rod 4B; the operating handle 1C drives the screw rod baffle 6D to move to one side, so that the handle insertion hole 62D is opposite to the screw rod 4B, and the operating handle 1C penetrates through the handle insertion hole 62D to be connected with the screw rod 4B in a driving mode; the drawer base 1 further comprises a baffle limiting assembly 4D in driving fit with the first lever 20D, when the breaker body 2 is located at the connection position and is switched on, the first lever 20D drives the baffle limiting assembly 4D to act, the baffle limiting assembly 4D and the lead screw baffle 6D are in limiting fit, and the lead screw baffle 6D is prevented from moving. Further, as shown in fig. 28A, the baffle limiting assembly 4D includes a second lever 43D, a stopper transmission arm 40D and a baffle limiting block 42D, the middle portion of the second lever 43D is rotatably disposed on the side plate of the drawer seat, one end of the second lever is drivingly connected to the first lever 20D, the other end of the second lever is drivingly connected to the stopper transmission arm 40D, and the baffle limiting block 42D is disposed at the other end of the stopper transmission arm 40D and is in limiting fit with the lead screw baffle 6D. Furthermore, a second lever waist-shaped hole 43-3D is formed in one end of the second lever 43D, and a stopper transmission arm connecting shaft 41D is arranged at one end of the stopper transmission arm 40D and is matched with the second lever waist-shaped hole 43-3D.

Preferably, as shown in fig. 28A, the first lever 20D is drivingly connected to the second lever 43D through the first lever return spring 7D, and the second lever 43D is connected to the drawer seat side plate through the second lever return spring 8D; the drawer base 1 further comprises a first lever limiting column 90D and a second lever limiting column 91D, the first lever return spring 7D enables the first lever 20D to abut against the first lever limiting column 90D, and the second lever return spring 8D enables the second lever 43D to abut against the second lever limiting column 91D. The first lever 20D is connected with the second lever 43D through the first lever return spring 7D in a driving manner, so that the situation that the first lever 20D, the second lever 43D and the baffle limiting assembly 4D are damaged when the baffle limiting assembly 4D is blocked (for example, the operating handle 1C is not pulled out of the handle insertion hole 62D in time) and cannot move can be avoided.

Specifically, as shown in fig. 28A, the middle of the first lever 20D is rotatably disposed on a side plate of the drawer seat through a first lever rotating shaft 21D, the left end of the first lever 20D is connected to the left end of the second lever 43D through a first lever return spring 7D, the left end of the second lever 43D is connected to the side plate of the drawer seat through a second lever return spring 8D, the right end of the first lever 20D is provided with a first lever fitting groove 23D, the right end of the first lever 20D abuts against the first lever limiting post 90D, the middle of the second lever 43D is rotatably disposed on the side plate of the drawer seat through a second lever rotating shaft 43-2D, and the right end of the second lever 43D is drivingly connected to the stopper driving arm 40D; as shown in fig. 28A and 28B, when the circuit breaker body 2 is located at the connection position, the switch driving shaft 13D of the rotating shaft assembly 1D enters the first lever matching groove 23D, when the circuit breaker body 2 is switched on, the rotating shaft assembly 1D axially rotates and drives the first lever 20D to clockwise rotate through the switch driving shaft 13D, the first lever 20D drives the second lever 43D to clockwise rotate through the first lever return spring 7D, and the second lever 43D drives the stopper driving arm 40D to drive the stopper limiting block 42D to move down to be in limit matching with the lead screw stopper 6D.

Preferably, as shown in fig. 28A, said first switch member can also cooperate with the second lever 43D, for example to set the first switch member in position P3.

Preferably, as shown in fig. 24 and 30, the circuit breaker of the present invention further includes a second switch serially connected in the power supply circuit of the motor 5B, and the second switch is driven to disconnect the power supply circuit of the motor 5B when the locking plate assembly 3B locks the guide rail 7B and the lead screw 4B, respectively. Further, as shown in fig. 30, the second switch member is a microswitch SS2 provided on the second mounting plate 30B between the second mounting plate 30B and the lock plate 31B and in driving engagement with the lock plate 31B; when the locking plate assembly 3B locks the guide rail 7B and the lead screw 4B, respectively, the locking plate 31B drives the microswitch SS2 to disconnect the power supply circuit of the motor 5B.

As shown in fig. 24, an example of the power supply circuit of the motor 5A is shown. As shown in fig. 24, the power supply circuit of the electric motor 5B further includes a current commutation switch S1, a field commutation button SB1 and a remote commutation button SB 2; the current reversing switch S1 includes first and second common contacts CT1 and CT2, first and second output contacts T1 and T2 mated with the first common contact CT1, and third and fourth output contacts T3 and T4 mated with the second common contact CT 2; the first common contact CT1 is connected to the first output contact T1 while the second common contact CT2 is connected to the third output contact T3, or the first common contact CT1 is connected to the second output contact T2 while the second common contact CT2 is connected to the fourth output contact T4; the first common contact CT1 is connected with the positive pole of the power supply through a first switch piece, and the second common contact CT2 is connected with the negative pole of the power supply; the first output contact T1 and the third output contact T3 are connected to respective inputs of a remote direction-changing button SB2, the second output contact T2 and the fourth output contact T4 are connected to respective inputs of a field direction-changing button SB1, a first output of the field direction-changing button SB1 and a second output of the remote direction-changing button SB2 are connected to one input of the electric motor 5B via a second switching element, a second output of the field direction-changing button SB1 and a first output of the remote direction-changing button SB2 are connected to the other input of the electric motor 5B, and the first output of the direction-changing button SB1 and the second output of the direction-changing button SB2 have opposite polarities. Furthermore, when the user operates the reversing button SB1 on site or remotely operates the reversing button SB2, the current reversing switch S1 can be controlled to operate, so that the direction of the current input to the motor 5A is changed, and the forward/reverse rotation control of the motor 5A is realized.

Specifically, the positive output end of the field reversing button SB1 and the negative output end of the remote reversing button SB2 are connected to the positive input end of the motor 5A through a second switch member (microswitch SS 2); the negative output of the field commutation button SB1 and the positive output of the remote commutation button SB2 are connected to the negative input of the motor 5A.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (16)

1. A circuit breaker comprises a drawer seat (1) and a circuit breaker body (2) arranged in the drawer seat (1); the drawer seat (1) comprises a drawer seat bottom plate (3A), and a sliding plate (1B) and a locking structure which are respectively arranged on the drawer seat bottom plate (3A); the sliding plate (1B) slides in a reciprocating manner relative to the bottom plate (3A) of the drawer base under the action of external force so as to drive the circuit breaker body (2) to switch among a separation position, a test position and a connection position; the locking structure comprises a guide rail (7B) and a locking plate component (3B); the guide rail (7B) is connected with the sliding plate (1B) and moves synchronously, the guide rail (7B) comprises three locking grooves which are sequentially arranged along the axial direction of the guide rail, namely a first locking groove (730B), a second locking groove (731B) and a third locking groove (732B) which respectively correspond to the separation position, the test position and the connection position; the method is characterized in that:

the locking plate assembly (3B) comprises a locking plate (31B) and a locking hook (32B), the locking hook (32B) is arranged on the locking plate (31B), the locking plate (31B) is perpendicular to the moving direction of the guide rail (7B), and the locking hook (32B) is in limit fit with the locking groove to lock the guide rail (7B); the guide rail (7B) further comprises a first transition boss (730-;

when the locking hook (32B) is in limit fit with a locking groove, the locking plate (31B) moves and resets under the action of external force, and after the locking plate (31B) drives the locking hook (32B) to move out of the locking groove, the locking hook (32B) moves towards the first direction relative to the locking plate (31B) and is in limit fit with the side wall of the guide rail (7B); the guide rail (7B) moves relative to the locking plate (31B), the first transition boss (730) and 731B) or the second transition boss (731 and 732B) drives the locking hook (32B) to move in the second direction relative to the locking plate (31B), and when the locking hook (32B) is opposite to the other locking groove, the locking plate (31B) drives the locking hook (32B) to move and insert into the locking groove.

2. The circuit breaker of claim 1, wherein: the locking plate (31B) can only move up and down relative to the locking plate (31B); the locking plate (31B) moves and resets under the action of external force, after the locking plate (31B) drives the locking hook (32B) to move out of the locking groove, the locking hook (32B) moves downwards relative to the locking plate (31B) until the lower end of the locking hook (32B) crosses the bottom wall of the locking groove and is in limit fit with the side wall of the guide rail (7B); the first transition boss (730-.

3. The circuit breaker of claim 1, wherein: the locking hook (32B) comprises a locking hook mounting part (320B) and a locking hook locking part (321B), and the locking hook locking part (321B) is arranged at the lower end of the locking hook mounting part (320B); the locking hook locking part (321B) is in limit fit with the locking groove, and the first transition boss (730) and 731B) or the second transition boss (731 and 732B) drives the locking hook (32B) to move upwards relative to the locking plate (31B) through the locking hook mounting part (320B).

4. The circuit breaker of claim 3, wherein: the locking plate (31B) comprises a locking plate body (31-0B) and a locking plate hook installation part (31-3B) arranged at one end of the locking plate body (31-0B), a locking plate guide rail avoiding groove (31-2B) used for avoiding the guide rail (7B) is formed at one side of the connection part of the locking plate body (31-0B) and the locking plate hook installation part (31-3B), the guide rail (7B) penetrates through the locking plate guide rail avoiding groove (31-2B), and the locking plate hook installation part (31-3B) and the locking hook (32B) are located on the upper side of the guide rail (7B).

5. The circuit breaker of claim 4, wherein: the locking plate (31B) further comprises a locking plate hook limiting part (316-1B) connected with one end of the locking plate hook mounting part (31-3B) in a bending mode and a locking plate hook mounting shaft (311-2B) arranged on the locking plate hook mounting part (31-3B), and the locking plate hook limiting part (316-1B) and the locking plate main body (31-0B) are respectively connected with two ends of the locking plate hook mounting part (31-3B); the locking plate hook limiting part (316-1B) is in limiting fit with the locking hook mounting part (320B); the locking hook (32B) comprises a locking hook waist-shaped hole (323B) arranged on the locking hook mounting part (320B), and the locking hook (32B) is mounted on the locking plate hook mounting shaft (311-2B) through the locking hook waist-shaped hole (323B) and is in limit fit with the locking plate hook limiting part (316-1B); the width of the locking hook waist-shaped hole (323B) is matched with the outer diameter of the locking plate hook mounting shaft (311-2B), and the length of the locking hook waist-shaped hole (323B) is larger than the outer diameter of the locking plate hook mounting shaft (311-2B).

6. The circuit breaker of claim 1, wherein: the first locking groove (730B), the first transition boss (730-; the first transition boss (730-.

7. The circuit breaker of claim 1, wherein: the locking plate assembly (3B) further comprises a second mounting plate (30B) which is fixedly arranged on the bottom plate (3A) of the drawer seat and arranged in parallel with the locking plate (31B), the locking plate (31B) is connected with the second mounting plate (30B) through a first connecting limiting structure, and the locking plate (31B) can only horizontally move relative to the second mounting plate (30B).

8. The circuit breaker of claim 7, wherein: the first connection limiting structure comprises a first locking plate limiting shaft (302B) and a second locking plate limiting shaft (303B) which are respectively arranged on the second mounting plate (30B), and a first locking plate waist-shaped hole (312B) and a second locking plate waist-shaped hole (313B) which are respectively arranged on the locking plate (31B); the first locking plate waist-shaped hole (312B) and the second locking plate waist-shaped hole (313B) are respectively matched with the first locking plate limiting shaft (302B) and the second locking plate limiting shaft (303B).

9. The circuit breaker of claim 1, wherein: the locking structure further comprises first locking springs (30-31B), and two ends of each first locking spring (30-31B) are respectively connected with the second mounting plate (30B) and the locking plate (31B) of the locking plate assembly (3B).

10. The circuit breaker of claim 7, wherein: the drawer base (1) further comprises a screw rod (4B), a guide rail (7B) is arranged on one side of the screw rod (4B) and is parallel to the screw rod, the screw rod (4B) comprises a screw rod threaded part (40B) arranged at one end of the screw rod, the screw rod threaded part (40B) is in threaded connection with the sliding plate (1B), and the screw rod (4B) axially rotates to drive the sliding plate (1B) to slide in a reciprocating mode relative to the bottom plate (3A) of the drawer base;

the locking plate (31B) further comprises a locking plate screw rod avoiding hole (310B) and a locking plate screw rod locking protrusion (3100B) arranged at one end of the locking plate screw rod avoiding hole (310B); the lead screw (4B) includes a plurality of lead screw locking grooves (42B) provided thereon;

the screw rod (4B) is inserted into the locking plate screw rod avoiding hole (310B), and when the locking plate (31B) locks the guide rail (7B), the locking plate screw rod locking protrusion (3100B) is simultaneously inserted into the screw rod locking groove (42B) to lock the screw rod (4B).

11. The circuit breaker of claim 10, wherein: drawer seat (1) still include with drawer seat bottom plate (3A) fixed link to each other and with second mounting panel (30B) parallel arrangement's first mounting panel (2B), slide (1B), first mounting panel (2B), lockplate (31B) and second mounting panel (30B) set gradually, lead screw (4B) rotate with first mounting panel (2B), second mounting panel (30B) respectively and link to each other.

12. The circuit breaker of claim 10, wherein: drawer seat (1) is still including being used for relieving locking plate subassembly (3B) and guide rail (7B), the locking reset structure of lead screw (4B) locking relation, the locking reset structure is including pivot (90B) and the handle (91B) that resets, pivot (90B) both ends that reset respectively with lockplate (31B), handle (91B) drive that resets links to each other, stir handle (91B) that resets, the drive is reset pivot (90B) axial and is rotated, pivot (90B) that resets drive locking plate (31B) and remove, make locking couple (32B) shift out and the spacing cooperation of lateral wall of guide rail (7B) from the locking groove, lead screw locking arch (3100B) shifts out from lead screw locking groove (42B) simultaneously.

13. The circuit breaker of claim 12, wherein: the reset rotating shaft (90B) comprises a reset rotating shaft main body which is rotatably arranged and two reset rotating shaft poking arms which are respectively arranged at two ends of the rotating shaft main body, wherein each reset rotating shaft poking arm is of an L-shaped structure and comprises a poking arm connecting part which is vertically connected with the reset rotating shaft main body and a poking arm transmission part which is parallel to the reset rotating shaft main body;

the reset operation handle (91B) comprises a reset operation handle main board (91-1B), and a reset operation handle driving part (91-3B) and a reset operation handle padlock handle (91-2B) which are respectively arranged at two sides of the reset operation handle main board (91-1B), wherein a waist-shaped reset operation handle driving groove (91-30B) is arranged in the middle of the reset operation handle driving part (91-3B) and is in driving fit with the poking arm transmission part.

14. The circuit breaker of claim 12, wherein: drawer seat (1) is still including setting up in drawer seat bottom plate (3A) one end and rather than fixed drawer seat panel (5A) that links to each other, reset operation handle mainboard (91-1B) slides and sets up on drawer seat panel (5A), drawer seat panel (5A) is including setting up panel padlock handle (51A) above that, lockplate (31B) locking guide rail (7B), during lead screw (4B), reset operation handle padlock handle (91-2B) is close to with panel padlock handle (51A), through lock (92B) with reset operation handle padlock handle (91-2B) and panel padlock handle (51) together, prevent to reset operation handle (91B) and remove, so that lockplate (31B) keep locking guide rail (7B), lead screw (4B).

15. The circuit breaker of claim 10, wherein: drawer seat (1) still includes and is used for removing lockplate (31B) and guide rail (7B), the locking reset structure of lead screw (4B) locking relation, the locking reset structure includes reset button spare (93B), reset button spare reset spring (94B) and reset connecting rod (95B), reset connecting rod (95B) middle part is rotated and is set up, reset button spare (93B) link to each other with lockplate (31B) drive through reset connecting rod (95B), press reset button spare (93B), drive reset connecting rod (95B) one end swing, reset connecting rod (95B) other end drive lockplate (31B) remove, remove the locking to guide rail (7B), lead screw (4B), reset button spare reset spring (94B) drive reset button spare (93B) reset.

16. The circuit breaker of claim 15, wherein: the reset button reset spring (94B) is sleeved on the screw rod (4B); the drawer seat (1) further comprises a drawer seat panel (5A) which is arranged at one end of the drawer seat bottom plate (3A) and fixedly connected with the drawer seat bottom plate, and the reset button piece (93B) is arranged on the drawer seat panel (5A) in a sliding mode.

Images