CN210897144U - Circuit breaker - Google Patents

Abstract

The utility model relates to the field of low-voltage electrical appliances, in particular to a circuit breaker, which comprises a circuit breaker casing and a locking mechanism. The locking mechanism includes a locking piece and an elastic piece. One end of the locking piece is slidably arranged in the breaker casing and passes through the elastic piece. It is connected with the circuit breaker casing, and the other end is provided with a locking protrusion, and the locking protrusion is protruded and arranged outside the circuit breaker casing through a first through hole provided on the side wall of the circuit breaker casing; the circuit breaker is installed to the circuit breaker When the circuit breaker is assembled in place, the casing of the circuit breaker assembly position squeezes the locking protrusion, so that the locking piece moves towards the inside of the circuit breaker casing as a whole. The locking protrusion is locked with the casing at the assembling position of the circuit breaker; the circuit breaker of the utility model has a simple structure of the locking mechanism and simple locking operation, which ensures the reliability of the circuit breaker installation.

Description

breaker

technical field

The utility model relates to the field of low-voltage electrical appliances, in particular to a circuit breaker.

Background technique

The use of circuit breakers can effectively improve the safety of electrical equipment. As an important member, plug-in miniature circuit breakers have developed into various structures in order to meet the installation needs of different electrical equipment. There are many existing plug-in miniature circuit breakers. A locking mechanism and an unlocking mechanism are provided, which are important conditions for ensuring reliable installation, convenient disassembly and safe electricity use of the circuit breaker.

The existing plug-in miniature circuit breaker has the problem of complex structure in its locking mechanism and unlocking mechanism, and if the plug-in miniature circuit breaker is in the closed state, if the locking mechanism fails, the miniature circuit breaker will come out of the circuit breaker assembly position, which will affect the user. the continuity and safety of electricity consumption.

SUMMARY OF THE INVENTION

The purpose of the utility model is to overcome the defects of the prior art, and to provide a circuit breaker with a simple structure of the locking mechanism, simple and convenient locking operation, and ensure the reliability of the installation of the circuit breaker.

To achieve the above object, the utility model adopts the following technical solutions:

A circuit breaker includes a circuit breaker housing 6; also includes a locking mechanism, the locking mechanism includes a locking member 5 and an elastic member 4, one end of the locking member 5 is slidably arranged in the circuit breaker casing 6 and is connected to the circuit breaker casing through the elastic member 4. body 6 is connected, and the other end is provided with a locking protrusion 50, and the locking protrusion 50 is protruded and arranged outside the circuit breaker case 6 through a first through hole 61 provided on the side wall of the circuit breaker case 6; the circuit breaker is installed When the circuit breaker assembly position is reached, the casing of the circuit breaker assembly position squeezes the locking protrusion 50, so that the locking member 5 moves as a whole toward the inside of the circuit breaker casing 6. After the circuit breaker is assembled in place, the elastic member 4 makes the locking member 5 integrally move. It moves toward the outside of the circuit breaker casing 6, and the locking projection 50 is locked with the casing of the circuit breaker assembly position.

Preferably, it also includes an operating mechanism and an unlocking mechanism. The operating mechanism includes a button 1 whose one end is inserted into the circuit breaker housing 6; the button 1 is pulled to the outside of the circuit breaker housing 6, and the button 1 drives the locking member 5 through the unlocking mechanism. The whole body moves toward the inside of the circuit breaker casing 6 to unlock the locking protrusion 50 from the casing of the circuit breaker assembly position.

Preferably, the movement direction of the circuit breaker insertion/extraction circuit breaker assembly position and the movement direction of the button 1 are both perpendicular to the movement direction of the locking member 5 .

Preferably, the unlocking mechanism includes an unlocking rod with one end connected to the button 1 and the other end provided with an unlocking end that drives and cooperates with the locking member 5; Move to the inside of the circuit breaker housing 6 to unlock the locking protrusion 50 from the housing of the circuit breaker assembly position.

Preferably, the locking member 5 includes an unlocking boss 51 obliquely disposed on one side thereof, and the unlocking end is drivingly engaged with the unlocking boss 51 .

Preferably, the operating mechanism further includes a U-shaped linkage rod 2 and a handle member 8, the handle member 8 is pivotally arranged in the circuit breaker housing 6, one end of the linkage rod 2 is connected to the button 1, and the other end is the first end of the linkage rod. Two ends 21, the second end 21 of the linkage rod passes through the handle member 8 and drives and cooperates with the locking member 5; the unlocking rod is the linkage rod 2, and the unlocking end is the second end 21 of the linkage rod.

Preferably, the elastic member 4 is a torsion spring, the torsion spring is sleeved on the installation shaft 64 , one end is connected with the locking member 5 , and the other end is connected with the circuit breaker housing 6 ; the handle member 8 is pivoted through the installation shaft 64 . The switch is arranged in the circuit breaker housing 6 .

Preferably, a locking piece chute 630 is provided on one side of the inner end of the first through hole 61 , and the locking piece 5 is slidably matched with the locking piece chute 630 .

Preferably, a locking member support table 631 is provided on one side of the inner end of the first through hole 61 , and a locking member sliding slot 630 is provided on the locking member supporting table 631 . The locking member 5 includes a locking member main body 52 . A locking piece sliding table 54 is provided, and the locking piece sliding table 54 is arranged in the locking piece sliding groove 630 to be slidably matched therewith.

Preferably, it also includes a button 1 whose one end is inserted in the circuit breaker housing 6, and the button 1 includes a safety boss 12 arranged on it. The safety boss 12 is located on one side of the locking member 5 to limit the engagement thereof, preventing the locking member 5 from moving toward the interior of the circuit breaker housing 6 .

Preferably, the locking member 5 includes a locking member main body 52 , a locking protrusion 50 , an unlocking boss 51 , a locking member sliding platform 54 and a limiting boss 53 , and the limiting boss 53 is provided on the locking member body 52 away from the locking member. One side of the protrusion 50 is in position-limiting cooperation with the safety boss 12 , one end of the locking member main body 52 is connected with the locking protrusion 50 , and a locking member sliding table 54 is provided on the end surface of this end of the locking member main body 52 . One side of one end is provided with an unlocking boss 51 , the unlocking boss 51 is inclined and the included angle α between its extending direction and the extending direction of the locking projection 50 is an acute angle.

Preferably, the unlocking boss 51 further includes an inclined part 510 and a stop part 511 which are connected by bending, and the extension direction of the stop part 511 is parallel to the extension direction of the locking protrusion 50 .

Preferably, it also includes an operating mechanism, a short-circuit protection mechanism 6a, an overload protection mechanism 6b, an arc-extinguishing chamber 7, an incoming terminal 8a, an outgoing terminal 9, and the cooperating movable contact 5a and static contact 5b, outgoing terminal 9 and button 1 are arranged side by side at one end of the circuit breaker casing 6, the incoming terminal 8a is arranged at the other end of the circuit breaker casing 6, and the arc extinguishing chamber 7 and the short-circuit protection mechanism 6a are arranged side by side in the circuit breaker casing 6 and are located at the incoming terminal 8a and the circuit breaker casing 6. Between the outlet terminals 9, the operating mechanism is arranged on the side of the short-circuit protection mechanism 6a, and the overload protection mechanism 6b is arranged on the side of the operating mechanism between the outlet terminal 9 and the arc extinguishing chamber 7. The operating mechanism is connected with the movable contact 5a, and the static contact The head 5b is provided on the side of the movable contact 5a and is fixedly connected to the circuit breaker case 6 .

Preferably, the operating mechanism includes a button 1, a linkage rod 2, a handle member 8, a connecting rod 3, a rotating plate 4a, a locking buckle 4b and a jumping buckle 4c, and the handle member 8 and the rotating plate 4a are respectively pivotally arranged on the circuit breaker casing On the body 6, one end of the button 1 is inserted into the circuit breaker housing 6, one end of the linkage rod 2 is connected with the button 1, the other end is connected with the handle member 8, one end of the connecting rod 3 is connected with the handle member 8, and the other end is connected with the lock 4b The locking buckle 4b and the jumping buckle 4c are respectively rotated and arranged on the rotating plate 4a, and the locking buckle 4b and the jumping buckle 4c are locked together. The overload protection mechanism 6b is driven to cooperate.

The circuit breaker of the utility model has a locking mechanism comprising a locking piece and an elastic piece, which realizes the locking of the circuit breaker and the casing of the circuit breaker assembly position. Reliable installation of circuit breaker assembly position.

In addition, the circuit breaker of the utility model has a simple unlocking operation, and the locking mechanism and the unlocking mechanism cooperate to realize the efficient installation and removal of the miniature circuit breaker. In addition, after the miniature circuit breaker of the present utility model is closed, the safety boss and the locking piece are limitedly matched to prevent the locking piece from moving toward the inside of the circuit breaker housing, so as to ensure that the miniature circuit breaker of the present utility model will not be in the closed state. It is pulled out, which ensures the safety of electricity use, and avoids the locking protrusion and the casing of the circuit breaker assembly position due to the failure of the locking mechanism (such as the loss of elasticity of the elastic member), so that the miniature circuit breaker is disengaged, and the miniature circuit breaker is guaranteed. reliability of the installation.

Description of drawings

Fig. 1 is the structural schematic diagram of the miniature circuit breaker of the present utility model, and the miniature circuit breaker is in an open state;

Fig. 2 is the enlarged structural representation of part A of Fig. 1 of the present utility model;

FIG. 3 is a schematic structural diagram of the miniature circuit breaker of the present invention, the miniature circuit breaker is in an open state, and compared with FIG. 1 , at least the matching relationship between the elastic member and the locking member is shown;

Fig. 4 is the enlarged structural representation of B part of Fig. 3 of the present utility model;

Fig. 5 is the structural schematic diagram of the miniature circuit breaker of the present invention, and the miniature circuit breaker is in the closed state;

Fig. 6 is the enlarged structural representation of C part of Fig. 5 of the present utility model;

Fig. 7 is the structural schematic diagram of the cooperation of the button and the locking piece when the miniature circuit breaker of the present invention is in the closed state;

8 is a schematic structural diagram of the circuit breaker housing of the present invention, showing at least the first through hole, the locking member support platform and the locking member chute;

9 is a schematic structural diagram of the miniature circuit breaker of the present invention, at this time, the unlocking mechanism drives the locking piece to move as a whole to the inside of the circuit breaker housing;

10 is a schematic structural diagram of the miniature circuit breaker of the present invention, at this time, the unlocking mechanism drives the locking piece to move as a whole to the inside of the circuit breaker housing, and at least shows the cooperation relationship between the linkage rod and the unlocking boss of the locking piece;

Fig. 11 is the enlarged structural schematic diagram of part D of Fig. 10 of the present utility model;

FIG. 12 is a schematic structural diagram of the locking piece of the present invention.

Detailed ways

The specific implementation of the miniature circuit breaker of the present invention will be further described below with reference to the embodiments given in the accompanying drawings 1-12. The miniature circuit breaker of the present invention is not limited to the description of the following embodiments.

The miniature circuit breaker of the present invention includes a circuit breaker casing 6 and a locking mechanism, the locking mechanism includes a locking member 5 and an elastic member 4, one end of the locking member 5 is slidably arranged in the circuit breaker casing 6 and is connected to the circuit breaker casing 6 through the elastic member 4. The circuit breaker casings 6 are connected to each other, and the other end is provided with a locking protrusion 50, which is protruded outside the circuit breaker casing 6 through a first through hole 61 provided on the side wall of the circuit breaker casing 6; the When the miniature circuit breaker is installed in the circuit breaker assembly position, the casing of the circuit breaker assembly position squeezes the locking protrusion 50, so that the locking piece 5 moves toward the inside of the circuit breaker casing 6 as a whole. After the miniature circuit breaker is assembled in place, the elastic member 4 The entire locking piece 5 is moved toward the outside of the circuit breaker casing 6, and the locking protrusion 50 is locked with the casing of the circuit breaker assembly position.

In the miniature circuit breaker of the present invention, the locking mechanism includes a locking member 5 and an elastic member 4, which realizes the locking of the miniature circuit breaker and the casing of the assembly position of the circuit breaker, the structure of the locking mechanism is simple, and the locking operation of the miniature circuit breaker is simple and convenient. It ensures the reliable installation of the miniature circuit breaker and the circuit breaker assembly position.

Preferably, the miniature circuit breaker of the present invention further includes a button 1 and an unlocking mechanism, one end of which is inserted into the circuit breaker housing 6, and the button 1 is pulled out of the circuit breaker housing 6, and the button 1 drives the locking piece through the unlocking mechanism 5 as a whole moves toward the inside of the circuit breaker casing 6 to unlock the locking protrusion 50 from the casing at the circuit breaker assembly position. The small circuit breaker of the utility model has simple unlocking operation, and the locking mechanism and the unlocking mechanism cooperate to realize the efficient installation and disassembly of the small circuit breaker.

Preferably, the direction in which the miniature circuit breaker is inserted into/extracted from the circuit breaker assembly position and the moving direction of the button 1 are both perpendicular to the moving direction of the locking member 5 .

Preferably, the miniature circuit breaker of the present invention further includes a button 1 with one end inserted in the circuit breaker casing 6 , the button 1 includes a safety boss 12 arranged on it, and the button 1 is pressed toward the inside of the circuit breaker casing 6 . After the miniature circuit breaker is closed, the safety boss 12 is located on one side of the locking piece 5 to cooperate with its limit, preventing the locking piece 5 from moving toward the inside of the circuit breaker housing 6 . After the miniature circuit breaker of the present utility model is closed, the safety boss 12 and the locking member 5 are limitedly matched to prevent the locking member 5 from moving toward the inside of the circuit breaker housing 6, so as to ensure that the miniature circuit breaker of the present invention will not be in the closed state. To ensure the safety of electricity use, and to prevent the locking protrusion 50 from unlocking the casing of the circuit breaker assembly position due to the failure of the locking mechanism (for example, the elasticity of the elastic member 4) The reliability of the miniature circuit breaker installation is improved.

It should be pointed out that the locking protrusion 50 is locked with the casing of the circuit breaker assembly position, which means that the two are limited to cooperate, thereby preventing the miniature circuit breaker from being pulled out from the circuit breaker assembly position; the locking protrusion 50 and the circuit breaker assembly position are locked. The unlocking of the casing of the circuit breaker assembly position means that the two are released from the limit cooperation, so that the miniature circuit breaker can be pulled out from the circuit breaker assembly position.

As shown in Figures 1-12, it is an embodiment of the utility model miniature circuit breaker.

The miniature circuit breaker of the present invention includes a circuit breaker casing 6 and a locking mechanism. The locking mechanism includes a locking member 5 and an elastic member 4. One end of the locking member 5 is slidably arranged in the circuit breaker casing 6 and is connected to the circuit breaker casing through the elastic member 4. body 6 is connected, the other end is provided with a locking protrusion 50, and the locking protrusion 50 is protruded outside the circuit breaker case 6 through a first through hole 61 provided on the side wall of the circuit breaker case 6; the small circuit breaker When installed in the circuit breaker assembly position, the casing of the circuit breaker assembly position squeezes the locking protrusion 50, so that the locking piece 5 moves toward the inside of the circuit breaker casing 6 as a whole. After the miniature circuit breaker is assembled in place, the elastic piece 4 makes the locking piece 5 as a whole moves toward the outside of the circuit breaker casing 6, and the locking protrusion 50 is locked with the casing of the circuit breaker assembly position.

Preferably, the moving direction of inserting/pulling out the circuit breaker assembly position of the miniature circuit breaker of the present invention is perpendicular to the moving direction of the locking member 5 .

Specifically, as shown in FIGS. 1-4 , the first through hole 61 is provided on the right side wall of the circuit breaker casing 6 , the left end of the locking member 5 is slidably arranged in the circuit breaker casing 6 , and the locking member 5 The right end is provided with a locking protrusion 50, the locking protrusion 50 is protruded and disposed on the right side of the circuit breaker housing 6 through the first through hole 61, and the elastic member 4 is disposed on the left side of the locking member 5, providing a rightward direction to the locking member 5. When the miniature circuit breaker of the present invention is installed in the circuit breaker assembly position, the lower end of the circuit breaker casing 6 is inserted into the circuit breaker assembly position, and the casing of the circuit breaker assembly position will squeeze the locking protrusion 50 to make the locking piece 5. The whole moves to the left (that is, the inner direction of the circuit breaker casing 6), and at the same time, the elastic part 4 stores energy. The energy of the element 4 is released, and the locking element 5 is pushed to move to the right as a whole, so that the locking protrusion 50 is locked with the casing of the circuit breaker assembly position.

Preferably, as shown in FIG. 8 , the inner end side of the first through hole 61 is provided with a locking piece sliding groove 630 , and the locking piece 5 is slidably matched with the locking piece sliding groove 630 . Further, as shown in FIGS. 7 and 8 , a locking member support table 631 is provided on one side of the inner end of the first through hole 61 , the locking member support table 631 is provided with a locking member sliding slot 630 , and the locking member 5 includes a locking member The main body 52, the locking piece The main body 52 is provided with a locking piece sliding table 54, and the locking piece sliding table 54 is arranged in the locking piece sliding groove 630 to be slidably matched with it (not shown in the figure).

Specifically, as shown in FIG. 8 , the locking member support platform 631 is disposed on the left side of the first through hole 61 and is connected to the part of the right side wall of the circuit breaker housing 6 located below the first through hole 61 , 6-7 , the locking piece sliding table 54 is arranged on the lower end face of the locking piece main body 52 , the locking piece 5 is arranged above the locking piece supporting table 631 , and the locking piece sliding table 54 is arranged in the locking piece sliding slot 630 and is connected with it. Slip fit.

It should be pointed out that, in the direction shown in FIG. 8 , the locking piece chute 630 can also be disposed above the left end of the first through hole 61 , or disposed on the bottom plate of the circuit breaker housing 6 (ie, the same as the first through hole 61 ). A locking piece chute 630 may be provided above the left end and below the left end of the first through hole 61 . Of course, the setting position of the locking member slide table 54 also needs to be changed accordingly.

It should be pointed out that the elastic member 4 can also be a spring, a tension spring or an elastic sheet, as long as it can provide a sufficient force for the locking member 5 to drive the locking protrusion 50 to move to the outside of the circuit breaker housing 6, and does not Interference with other structures within the miniature circuit breaker. For example, if the elastic piece 4 is an elastic piece, one end of the elastic piece is fixedly connected with the circuit breaker housing 6 , and the other end is connected with the locking piece 5 . The elastic member 4 of the present invention is a torsion spring, which provides a driving force for the locking member 5, and is beneficial to simplify the structure of the circuit breaker. The complexity of the circuit breaker structure is increased, so the elastic member 4 of the present invention is preferably a torsion spring.

Preferably, as shown in Figures 1, 3, 5, 9-10, the miniature circuit breaker of the present invention further includes an unlocking mechanism and an operating mechanism, the operating mechanism includes a button 1, and one end of the button 1 is inserted into the circuit breaker housing 6 , Pull the button 1 to the outside of the circuit breaker casing 6, the button 1 drives the locking piece 5 to move toward the inside of the circuit breaker casing 6 as a whole through the unlocking mechanism, so that the locking protrusion 50 and the casing of the circuit breaker assembly position are unlocked. Further, the moving direction of the button 1 is perpendicular to the moving direction of the locking member 5 . Further, as shown in FIGS. 9-11 , the unlocking mechanism includes an unlocking lever whose one end is connected to the button 1 and the other end is provided with an unlocking end that is drivingly matched with the locking member 5 ; , the unlocking end drives the locking piece 5 to move toward the inside of the circuit breaker casing 6 as a whole, so that the locking protrusion 50 is unlocked from the casing of the circuit breaker assembly position. Further, as shown in FIGS. 10-12 , the locking member 5 includes an unlocking boss 51 obliquely disposed on one side thereof, and the unlocking end is drivingly engaged with the unlocking boss 51 .

Preferably, as shown in FIG. 9 , the operating mechanism further includes a U-shaped linkage rod 2 and a handle member 8, the handle member 8 is pivotally arranged in the circuit breaker housing 6, and one end of the linkage rod 2 is connected to the button 1, The other end is the second end 21 of the linkage rod, and the second end 21 of the linkage rod passes through the handle member 8 and then drives and cooperates with the locking member 5; the unlocking rod is the linkage rod 2, and the unlocking end is the second end 21 of the linkage rod. Further, as shown in FIG. 2 , the handle member 8 is provided with a waist-shaped hole 82 , and the second end 21 of the linkage rod passes through the waist-shaped hole 82 and is driven to cooperate with the locking member 5 .

Specifically, as shown in Figures 9-10, the lower end of the button 1 is inserted into the upper end of the circuit breaker housing 6 and can move up and down, the upper end of the linkage rod 2 is connected to the button 1, and the second end 21 of the linkage rod is connected to the handle member 8 The middle part of the handle member 8 is pivotally arranged on the circuit breaker housing 6, and the second end 21 of the linkage rod passes through the handle member 8 and is located below the unlocking boss 51 of the locking member 5. The unlocking boss 51 is inclined upward from the left end to the right end. , when the button 1 is pulled up, the second end 21 of the linkage rod moves to the upper left due to the restriction of the handle member 8, and firstly contacts the right end of the lower side of the unlocking boss 51 (that is, contacts the right end of the driving slope 510a of the inclined portion 510), and then The second end 21 of the linkage rod continues to move (until the second end 21 of the linkage rod moves below the stopper portion 511 of the unlocking boss 51, and engages with the stop surface 511a of the stopper portion 511), forcing the unlocking boss 51 to face each other It slides on the second end 21 of the linkage rod and drives the locking member 5 to move to the left as a whole until the locking protrusion 50 of the locking member 5 is unlocked from the casing of the circuit breaker assembly position.

It should be pointed out that the locking member 5 may not be provided with the unlocking boss 51, but may be provided with an unlocking groove, and the unlocking groove is inclined and arranged to be similar to the direction of the unlocking boss 51, and the second end 21 of the linkage rod is inserted into the unlocking groove. When the button 1 drives the second end 21 of the linkage rod to move up, the second end 21 of the linkage rod drives the unlocking groove to slide relative to the second end 21 of the linkage rod, thereby driving the locking member 5 to move toward the inside of the circuit breaker housing 6 as a whole. .

Preferably, as shown in Figures 3 and 4, the elastic member 4 is a torsion spring, which is sleeved on the installation shaft 64, one end is connected to the locking member 5, and the other end is connected to the circuit breaker housing 6; The handle member 8 is pivotally arranged in the circuit breaker housing 6 by means of a mounting shaft 64 . Further, as shown in FIG. 4 , the installation shaft 64 includes an inner end 641 of the installation shaft and an outer end 640 of the installation shaft. The outer diameter of the inner end 641 of the installation shaft is larger than the outer diameter of the outer end 640 of the installation shaft, and the torsion spring is sleeved on the outer diameter of the installation shaft. On the inner end 641 of the installation shaft, the handle member 8 is pivotally arranged on the outer end 640 of the installation shaft. Further, the mounting shaft 64 and the circuit breaker housing 6 are integrally formed.

Preferably, as shown in FIGS. 5-7 , the button 1 includes a safety boss 12 arranged thereon. After the button 1 is pressed toward the inside of the circuit breaker housing 6 to close the miniature circuit breaker, the safety boss 12 is located at One side of the locking piece 5 is matched with its limit, preventing the locking piece 5 from moving toward the inside of the circuit breaker housing 6 .

Specifically, as shown in FIGS. 5-7 , the safety boss 12 is arranged on the right side of the lower end of the button 1 , and the button 1 is pressed down to close the miniature circuit breaker. At the same time, the safety boss 12 is located on the left side of the locking member 5 and The limit fit prevents the locking piece 5 from moving to the left. Further, in the direction shown in FIG. 7 , the safety boss 12 is cooperating with the limiting boss 53 of the locking member 5 in a limited position.

As shown in FIGS. 7 and 12 , it is an embodiment of the locking member 5 .

The locking member 5 includes a locking member main body 52 , a locking protrusion 50 , an unlocking boss 51 , a locking member sliding platform 54 and a limiting boss 53 , and the limiting boss 53 is provided on the locking member body 52 away from the locking member protrusion. One side of the 50 is in position-limiting cooperation with the safety projection 12, one end of the locking piece main body 52 is connected with the locking projection 50, and the end surface of this end of the locking piece main body 52 is provided with a locking piece sliding table 54, and the other end of the locking piece main body 52 An unlocking boss 51 is provided on one side, the unlocking boss 51 is inclined and the included angle α between the extending direction thereof and the extending direction of the locking projection 50 is an acute angle. Further, as shown in FIGS. 7 and 12 , the unlocking boss 51 further includes an inclined portion 510 and a stop portion 511 which are connected by bending, and the extension direction of the stop portion 511 is parallel to the extension direction of the locking projection 50 . Further, a driving slope 510a is provided on the lower side of the inclined portion 510, and a stop surface 511a is arranged on the lower side of the stop portion 511, and the driving slope 510a is connected to the stop surface 511a by bending.

Specifically, as shown in FIG. 7 , the locking piece body 52 and the locking protrusion 50 are integrally formed into an L-shaped structure, the locking protrusion 50 is arranged on the right side of the lower end of the locking piece body 52 , and the locking piece sliding table 54 is arranged on the locking piece On the lower end face of the main body 52, the limiting boss 53 is arranged on the left side of the upper end of the locking piece main body 52, the unlocking boss 51 is arranged on the front side of the upper end of the locking piece body 52, and the unlocking boss 51 is inclined upward from the left end to the right end. Further, as shown in FIG. 12 , the unlocking boss 51 includes an inclined portion 510 and a stop portion 511 . The lower end of the inclined portion 510 protrudes from the left side of the locking member body 52 , and the upper end is connected to the stop portion 511 by bending, and the inclined portion 510 is inclined. The lower side of the part 510 is provided with a driving slope 510a, and the lower side of the stopper part 511 is provided with a stopper surface 511a.

It should be pointed out that, as shown in FIG. 9 , the miniature circuit breaker of the present invention also includes a short-circuit protection mechanism 6a, an overload protection mechanism 6b, an arc extinguishing chamber 7, an incoming line terminal 8a, an outgoing line terminal 9 and a moving contact used in conjunction with it. 5a and static contact 5b, the outgoing terminal 9 and the button 1 are arranged side by side at one end of the circuit breaker casing 6, the incoming terminal 8a is arranged at the other end of the circuit breaker casing 6, and the arc extinguishing chamber 7 and the short-circuit protection mechanism 6a are arranged side by side at the circuit breaker. Inside the housing 6 and between the incoming terminal 8a and the outgoing terminal 9, the operating mechanism is arranged on the side of the short-circuit protection mechanism 6a, and the overload protection mechanism 6b is arranged on the operating mechanism side between the outgoing terminal 9 and the arc extinguishing chamber 7 , the operating mechanism is connected with the moving contact 5a, and the static contact 5b is arranged on one side of the moving contact 5a and is fixedly connected with the circuit breaker housing 6.

Preferably, as shown in FIG. 9 , the operating mechanism includes a button 1, a linkage rod 2, a handle member 8, a connecting rod 3, a rotating plate 4a, a locking buckle 4b and a jumping buckle 4c, and the handle member 8 and the rotating plate 4a pivot respectively The switch is arranged on the circuit breaker housing 6, one end of the button 1 is inserted into the circuit breaker housing 6, one end of the linkage rod 2 is connected with the button 1, the other end is connected with the handle piece 8, and one end of the connecting rod 3 is connected with the handle piece 8, The other end is connected with the lock 4b, the lock 4b and the jumper 4c are respectively rotatably arranged on the rotating plate 4a, and the lock 4b and the jumper 4c are locked together, the rotating plate 4a is connected with the moving contact 5a, and the jumper 4c is respectively Drive and cooperate with the short-circuit protection mechanism 6a and the overload protection mechanism 6b.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (14)

1. A circuit breaker comprising a circuit breaker housing (6); the method is characterized in that: the locking mechanism comprises a locking piece (5) and an elastic piece (4), one end of the locking piece (5) is arranged in the breaker shell (6) in a sliding mode and is connected with the breaker shell (6) through the elastic piece (4), the other end of the locking piece is provided with a locking bulge (50), and the locking bulge (50) is arranged on the outer side of the breaker shell (6) in a protruding mode through a first through hole (61) formed in the side wall of the breaker shell (6); when the circuit breaker is installed to the circuit breaker assembly position, the casing extrusion locking of circuit breaker assembly position is protruding (50), makes locking piece (5) wholly remove to the inside direction of circuit breaker casing (6), and the circuit breaker assembly back that targets in place, and elastic component (4) make locking piece (5) wholly remove to the outside direction of circuit breaker casing (6), and locks protruding (50) and the casing locking of circuit breaker assembly position.

2. The circuit breaker of claim 1, wherein: the circuit breaker further comprises an operating mechanism and an unlocking mechanism, wherein the operating mechanism comprises a button (1) with one end inserted into the circuit breaker shell (6); the button (1) is pulled towards the external direction of the breaker shell (6), and the button (1) drives the locking piece (5) to integrally move towards the internal direction of the breaker shell (6) through the unlocking mechanism, so that the locking protrusion (50) is unlocked with the shell of the breaker assembly position.

3. The circuit breaker of claim 2, wherein: the moving direction of the circuit breaker inserting/pulling-out circuit breaker assembling position and the moving direction of the button (1) are both vertical to the moving direction of the locking piece (5).

4. The circuit breaker according to claim 2 or 3, characterized in that: the unlocking mechanism comprises an unlocking pull rod, one end of the unlocking pull rod is connected with the button (1), and the other end of the unlocking pull rod is provided with an unlocking end in driving fit with the locking piece (5); the button (1) is pulled towards the external direction of the breaker shell (6), and the unlocking end drives the locking piece (5) to integrally move towards the internal direction of the breaker shell (6), so that the locking protrusion (50) and the shell of the breaker assembly position are unlocked.

5. The circuit breaker of claim 4, wherein: the locking piece (5) comprises an unlocking boss (51) obliquely arranged on one side of the locking piece, and the unlocking end is in driving fit with the unlocking boss (51).

6. The circuit breaker of claim 4, wherein: the operating mechanism further comprises a linkage rod (2) and a handle piece (8) which are of a U-shaped structure, the handle piece (8) is arranged in the breaker shell (6) in a pivoting mode, one end of the linkage rod (2) is connected with the button (1), the other end of the linkage rod is a second end (21) of the linkage rod, and the second end (21) of the linkage rod penetrates through the handle piece (8) and then is in driving fit with the locking piece (5); the unlocking pull rod is a linkage rod (2), and the unlocking end is a second end (21) of the linkage rod.

7. The circuit breaker of claim 6, wherein: the elastic piece (4) is a torsion spring, the torsion spring is sleeved on the mounting shaft (64), one end of the torsion spring is connected with the locking piece (5), and the other end of the torsion spring is connected with the breaker shell (6); the handle member (8) is pivotally disposed within the circuit breaker housing (6) by a mounting shaft (64).

8. The circuit breaker according to any one of claims 1-3, wherein: the inner end side of the first through hole (61) is provided with a locking piece sliding groove (630), and the locking piece (5) is in sliding fit with the locking piece sliding groove (630).

9. The circuit breaker of claim 8, wherein: first through-hole (61) inner one side is equipped with locking piece supporting bench (631), is equipped with locking piece spout (630) on locking piece supporting bench (631), and locking piece (5) are equipped with locking piece slip table (54) including locking piece main part (52) on locking piece main part (52), and locking piece slip table (54) set up rather than sliding fit in locking piece spout (630).

10. The circuit breaker according to any one of claims 1-3, wherein: the circuit breaker is characterized by further comprising a button (1) with one end inserted into the circuit breaker shell (6), wherein the button (1) comprises a safety boss (12) arranged on the button, and after the button (1) is pressed towards the inner direction of the circuit breaker shell (6) to enable the circuit breaker to be switched on, the safety boss (12) is located on one side of the locking piece (5) and is in limit fit with the locking piece, and the locking piece (5) is prevented from moving towards the inner direction of the circuit breaker shell (6).

11. The circuit breaker according to claim 10, wherein the locking member (5) comprises a locking member main body (52), a locking protrusion (50), an unlocking boss (51), a locking member sliding table (54) and a limiting boss (53), the limiting boss (53) is arranged on one side of the locking member main body (52) far away from the locking protrusion (50) and is in limiting fit with the safety boss (12), one end of the locking member main body (52) is connected with the locking protrusion (50), the locking member sliding table (54) is arranged on the end face of the end of the locking member main body (52), the unlocking boss (51) is arranged on one side of the other end of the locking member main body (52), the unlocking boss (51) is obliquely arranged, and the extending direction of the unlocking boss and the extending direction of the locking protrusion (50) form an acute angle α.

12. The circuit breaker of claim 11, wherein: the unlocking boss (51) further comprises an inclined part (510) and a stopping part (511) which are connected in a bent mode, and the extending direction of the stopping part (511) is parallel to the extending direction of the locking protrusion (50).

13. The circuit breaker of claim 1, wherein: the circuit breaker is characterized by further comprising an operating mechanism, a short-circuit protection mechanism (6a), an overload protection mechanism (6b), an arc extinguish chamber (7), a wire inlet terminal (8a), a wire outlet terminal (9) and a movable contact (5a) and a fixed contact (5b) which are matched with the wire outlet terminal (9) in use, the wire outlet terminal (9) and a button (1) are arranged at one end of the circuit breaker shell (6) side by side, the wire inlet terminal (8a) is arranged at the other end of the circuit breaker shell (6), the arc extinguish chamber (7) and the short-circuit protection mechanism (6a) are arranged in the circuit breaker shell (6) side by side and located between the wire inlet terminal (8a) and the wire outlet terminal (9), the operating mechanism is arranged on one side of the short-circuit protection mechanism (6a), the overload protection mechanism (6b) is arranged on one side of the operating mechanism and located between the wire outlet terminal (9) and the arc extinguish chamber (7), the operating mechanism is connected with the.

14. The circuit breaker of claim 13, wherein: the operating mechanism comprises a button (1), a linkage rod (2), a handle piece (8), a connecting rod (3), a rotating plate (4a), a lock catch (4b) and a jump buckle (4c), the handle piece (8) and the rotating plate (4a) are respectively pivoted on a breaker shell (6), one end of the button (1) is inserted in the breaker shell (6), one end of the linkage rod (2) is connected with the button (1), the other end of the linkage rod is connected with the handle piece (8), one end of the connecting rod (3) is connected with the handle piece (8), the other end of the connecting rod is connected with the lock catch (4b), the lock catch (4b) and the jump buckle (4c) are respectively and rotatably arranged on the rotating plate (4a), and the lock catch (4b) is matched with the jump buckle (4c) in a lock catch manner, the rotating plate (4a) is connected with the moving contact (5a), and the jump buckle (4c) is respectively matched with the short-circuit protection mechanism (6a) and the overload protection mechanism (6b) in a driving manner.

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