阅读说明：本技术 一种***式断路器的安装限位结构 (Installation limit structure of plug-in circuit breaker ) 是由 卢科军 杨安 于 2020-07-06 设计创作，主要内容包括：一种插入式断路器的安装限位结构,包括断路器的壳体,所述断路器的壳体包括四个侧壁和两个端壁,其中一个端壁作为顶壁设有断路器的操作按钮和输出端子,另一个端壁作为断路器的底壁设有输入端子,四个侧壁分别为相对设置的上侧壁和下侧壁,相对设置的左侧壁和右侧壁,在所述上侧壁或下侧壁上设有导向限位结构,所述导向限位结构包括导向凸台和/或导向凹槽。本发明的一种插入式断路器的安装限位结构,在壳体与机柜之间设置导向限位结构,导向限位结构在断路器安装时提供导向作用,同时在安装完毕后能够防止插入式断路器在机柜内部产生晃动。(The utility model provides an installation limit structure of plug-in circuit breaker, includes the casing of circuit breaker, the casing of circuit breaker includes four lateral walls and two end walls, and one of them end wall is equipped with the operating button and the output terminal of circuit breaker as the roof, and another end wall is equipped with input terminal as the diapire of circuit breaker, and four lateral walls are relative last lateral wall and the lower lateral wall that sets up respectively, the relative left side wall and the right side wall that sets up go up the lateral wall or be equipped with direction limit structure on the lower lateral wall, direction limit structure includes direction boss and/or direction recess. According to the installation limiting structure of the plug-in circuit breaker, the guide limiting structure is arranged between the shell and the cabinet, the guide limiting structure provides a guide effect when the circuit breaker is installed, and meanwhile the plug-in circuit breaker can be prevented from shaking in the cabinet after the installation is finished.)

1. The utility model provides an installation limit structure of plug-in circuit breaker, includes casing (1) of circuit breaker, casing (1) of circuit breaker includes four lateral walls and two end walls, and one of them end wall is equipped with operating button (3) and the output terminal of circuit breaker as roof (12), and another end wall is equipped with the input terminal as diapire (13) of circuit breaker, and four lateral walls are relative last lateral wall (11) and the lower lateral wall (14) that set up respectively, relative left side wall and the right side wall that sets up, its characterized in that: the upper side wall (11) or the lower side wall (14) is provided with a guide limiting structure, and the guide limiting structure on the upper side wall (11) or the lower side wall (14) comprises a guide boss (1a) and/or a guide groove (1 b).

2. The mounting and limiting structure of the plug-in type circuit breaker according to claim 1, wherein: the upper side wall (11) or the lower side wall (14) is provided with a guide boss (1a), a groove structure matched with the guide boss (1a) is arranged on a cabinet wall (21) of the cabinet for mounting the circuit breaker, and the guide boss (1a) of the upper side wall (11) or the lower side wall (14) can slide to a specified mounting position along the groove structure on the cabinet wall (21).

3. The mounting and limiting structure of the plug-in type circuit breaker according to claim 1, wherein: the guide bosses (1a) serving as the guide limiting structures can be arranged in a plurality of numbers and are uniformly distributed on the upper side wall (11) or the lower side wall (14) of the circuit breaker.

4. The mounting and limiting structure of the plug-in type circuit breaker according to claim 1, wherein: go up lateral wall (11) or lower lateral wall (14) and set up guide groove (1b), be equipped with on the cabinet wall (21) that is used for installing the rack of circuit breaker with guide groove (1b) matched with boss structure, go up lateral wall (11) or lower lateral wall (14) guide groove (1b) and the boss structure of cabinet wall (21) cooperate and make the circuit breaker slide to appointed mounted position.

5. The mounting and limiting structure of the plug-in type circuit breaker according to claim 1, wherein: the length of the guide boss (1a) or the guide groove (1b) on the upper side wall (11) or the lower side wall (14) is larger than the depth of the wire inserting groove of the input terminal on the bottom wall (13).

6. The mounting and limiting structure of the plug-in type circuit breaker according to claim 1, wherein: be equipped with on the circuit breaker and instruct limit structure, instruct limit structure including setting up at last lateral wall (11) and top wall (12) the junction instruct boss (1c) for with instruction recess (2c) cooperation at cabinet wall (21) edge.

7. The mounting and limiting structure of the plug-in type circuit breaker according to claim 6, wherein: a through hole which is consistent with the insertion direction of the circuit breaker is arranged in the middle of the indication boss (1c) and is used for being matched with an indication rod which protrudes in the indication groove (2c) at the edge of the cabinet wall (21), and the indication rod can slide through the through hole of the indication boss (1 c).

8. The mounting and limiting structure of the plug-in type circuit breaker according to claim 1, wherein: the upper side wall (11) of the circuit breaker is provided with a locking structure, the locking structure comprises a locking protrusion (1d) protruding out of the upper side wall (11) and used for being matched with a clamping groove (2d) of a cabinet wall (21) of a cabinet, a locking piece and an elastic piece matched with the locking piece are arranged in a shell (1) of the circuit breaker, the locking protrusion (1d) on the locking piece is driven by the elastic force of the elastic piece to protrude out of the upper side wall (11) of the shell (1), and the locking protrusion (1d) can be retracted into the shell (1) of the circuit breaker by pressing the locking protrusion (1d) through the force perpendicular to the direction of the upper side wall (11) to overcome the elastic force of the elastic piece; when the circuit breaker is installed, the cabinet wall (21) and the upper side wall (11) are matched to press the locking protrusion (1d), so that the locking protrusion (1d) retracts into the shell (1) of the circuit breaker, and when the locking protrusion (1d) moves to the position corresponding to the clamping groove (2d), the locking protrusion (1d) is clamped into the clamping groove (2d) to lock the circuit breaker.

9. The mounting and limiting structure of the plug-in type circuit breaker according to claim 8, wherein: be equipped with the deblocking piece in roof (12) one side of circuit breaker, the locking piece cooperation in deblocking piece and the circuit breaker can drive the locking piece and overcome the elasticity of elastic component through pressing down or pulling deblocking piece, makes in locking protruding (1d) withdrawal casing (1), can extract the circuit breaker this moment.

10. The mounting and limiting structure of the plug-in type circuit breaker according to claim 1, wherein: and the lower side wall (14) or the upper side wall (11) is provided with a regulating screw hole of the bimetallic strip.

11. The mounting and limiting structure of the plug-in type circuit breaker according to claim 6, wherein: the upper side wall (11) of the circuit breaker is provided with a locking structure, the locking structure comprises a locking protrusion (1d) protruding out of the upper side wall (11) and used for being matched with a clamping groove (2d) of a cabinet wall (21) of a cabinet, and the central axes of the locking structure, the indicating limiting structure and the guiding limiting structure are not coincident.

Technical Field

The invention relates to a plug-in circuit breaker, in particular to an installation limiting structure of the plug-in circuit breaker.

Background

The low-voltage circuit breaker has a certain protection function in addition to a control function in a circuit, and is widely applied to the control and protection of various levels of inlet and outlet wires of a low-voltage distribution system, the power control of various mechanical equipment and the control and protection of power terminals. The existing circuit breakers are divided into plug-in type, fixed type and drawer type according to the installation mode, the use of the circuit breaker can effectively improve the safety of the equipment use industry, and the use of the plug-in type circuit breaker is the most widely used along with the increase of application occasions. However, most of the existing plug-in circuit breakers are not designed with installation limiting functions, so that the circuit breaker installed in a cabinet is prone to shaking, and potential safety hazards of electricity utilization are prone to being caused.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the installation limiting structure of the plug-in circuit breaker, which has a simple structure and high reliability.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an installation limit structure of plug-in circuit breaker, includes the casing of circuit breaker, the casing of circuit breaker includes four lateral walls and two end walls, and one of them end wall is equipped with the operating button and the output terminal of circuit breaker as the roof, and another end wall is equipped with input terminal as the diapire of circuit breaker, and four lateral walls are relative last lateral wall and the lower lateral wall that sets up respectively, the left side wall and the right side wall that set up relatively be equipped with direction limit structure on going up lateral wall or the lower lateral wall, go up on lateral wall or the lower lateral wall direction limit structure includes direction boss and/or direction recess.

And furthermore, a guide boss is arranged on the upper side wall or the lower side wall, a groove structure matched with the guide boss is arranged on the cabinet wall of the cabinet for mounting the circuit breaker, and the guide boss on the upper side wall or the lower side wall can slide to a specified mounting position along the groove structure on the cabinet wall.

Furthermore, a plurality of guide bosses serving as guide limiting structures can be uniformly distributed on the upper side wall or the lower side wall of the circuit breaker.

Further, the upper side wall or the lower side wall is provided with a guide groove, a boss structure matched with the guide groove is arranged on the cabinet wall of the cabinet for mounting the circuit breaker, and the guide groove of the upper side wall or the lower side wall is matched with the boss structure of the cabinet wall to enable the circuit breaker to slide to a specified mounting position.

Further, the length of the guide boss or the guide groove on the upper side wall or the lower side wall is larger than the depth of the wire inserting groove of the input terminal on the bottom wall.

Furthermore, be equipped with on the circuit breaker and instruct limit structure, instruct limit structure including setting up the instruction boss in the linking department of last lateral wall and roof for with the cooperation of the instruction recess at cabinet wall edge.

Furthermore, a through hole which is consistent with the insertion direction of the circuit breaker is formed in the middle of the indication boss and is used for being matched with an indication rod protruding in the indication groove at the edge of the cabinet wall, and the indication rod can slide through the through hole of the indication boss.

Furthermore, a locking structure is arranged on the upper side wall of the circuit breaker, the locking structure comprises a locking bulge protruding out of the upper side wall and used for being matched with a clamping groove of a cabinet wall of the cabinet, a locking piece and an elastic piece matched with the locking piece are arranged in a shell of the circuit breaker, the elastic force of the elastic piece drives the locking bulge on the locking piece to protrude out of the upper side wall of the shell, and the locking bulge can be pressed by a force vertical to the direction of the upper side wall to enable the locking bulge to retract into the shell of the circuit breaker by overcoming the elastic force of the elastic piece; when the circuit breaker is installed, the cabinet wall and the upper side wall are matched to press the locking protrusion, so that the locking protrusion retracts into the shell of the circuit breaker, and when the locking protrusion moves to the position corresponding to the clamping groove, the locking protrusion is clamped into the clamping groove to lock the circuit breaker.

Further, be equipped with the deblocking piece in roof one side of circuit breaker, the cooperation of the locking piece in deblocking piece and the circuit breaker can drive the locking piece and overcome the elasticity of elastic component through pressing or pulling deblocking piece, makes the protruding shrink of locking in the casing, can extract the circuit breaker this moment.

Furthermore, the upper side wall or the upper side wall of the lower side wall is provided with an adjusting screw hole of the bimetallic strip.

Furthermore, the upper side wall of the circuit breaker is provided with a locking structure, the locking structure comprises a locking protrusion protruding out of the upper side wall and used for being matched with a clamping groove of the cabinet wall of the cabinet, and the central axes of the locking structure, the indication limiting structure and the guide limiting structure are not coincident.

According to the installation limiting structure of the plug-in circuit breaker, the guide limiting structure is arranged on the upper side wall or the lower side wall of the shell and comprises the guide boss and/or the guide groove which is used for being matched with the groove structure and/or the boss structure on the cabinet machine, the guide limiting structure provides a guide effect when the circuit breaker is installed, and meanwhile the plug-in circuit breaker can be prevented from shaking in the cabinet after the installation is finished.

In addition, still be provided with between casing and rack and be used for instructing the circuit breaker installation spacing structure that targets in place, do benefit to the staff and in time judge whether the circuit breaker installation targets in place in the installation.

Simultaneously, locking structure is used for preventing that the circuit breaker from not being extracted at will, and the central axis of direction limit structure, instruction limit structure and locking structure three does not coincide, effectively restricts the circuit breaker and rocks.

Drawings

Fig. 1-2 are structural illustrations of a first embodiment of a mounting limit structure of a plug-in type circuit breaker of the present invention;

fig. 3-4 are structural illustrations of a second embodiment of a mounting limit structure of a plug-in circuit breaker of the present invention;

fig. 5 is a schematic structural view of a circuit breaker case in a third embodiment of an installation limiting structure of a plug-in type circuit breaker according to the present invention.

Detailed Description

The following describes a specific embodiment of an installation limiting structure of a plug-in circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 5. The installation limiting structure of a plug-in type circuit breaker of the present invention is not limited to the description of the following embodiments.

The utility model provides an installation limit structure of plug-in circuit breaker, includes the casing 1 of circuit breaker, the casing 1 of circuit breaker includes four lateral walls and two end walls, and one of them end wall is equipped with the operation button 3 and the output terminal of circuit breaker as roof 12, and another end wall is equipped with input terminal as the diapire 13 of circuit breaker, and four lateral walls are respectively for relative last lateral wall 11 and the lower lateral wall 14 that sets up, relative left side wall and the right side wall that sets up go up and be equipped with direction limit structure on lateral wall 11 or the lower lateral wall 14, direction limit structure includes direction boss 1a and/or direction recess 1 b.

According to the installation limiting structure of the plug-in circuit breaker, the guide limiting structure is arranged on the upper side wall or the lower side wall of the shell and comprises the guide boss and/or the guide groove which is used for being matched with the groove structure and/or the boss structure on the cabinet machine, the guide limiting structure provides a guide effect when the circuit breaker is installed, and meanwhile the plug-in circuit breaker can be prevented from shaking in the cabinet after the installation is finished.

In connection with fig. 1-2, a first embodiment is provided, which includes a case 1 of a circuit breaker and a cabinet for mounting the circuit breaker, the case 1 of the circuit breaker includes four side walls and two end walls, wherein one end wall is used as a top wall 12 and is provided with an operation button 3 and an output terminal of the circuit breaker, the other end wall is used as a bottom wall 13 of the circuit breaker and is provided with an input terminal, the four side walls are respectively an upper side wall 11 and a lower side wall 14 which are oppositely arranged, and a left side wall and a right side wall which are oppositely arranged, the width of the upper side wall 11 and the lower side wall 14 of the circuit breaker in the figure is smaller than that of the left side wall and the right side wall, in a multi-pole circuit breaker (not shown), the width of the upper side wall 11 and the lower side wall 14 of the circuit breaker is larger than that of the left side wall and the right, the guide limiting structure comprises a guide boss 1a or a guide groove 1b, or the guide boss 1a and the guide groove 1b are arranged simultaneously. It should be noted that the length of the guiding projection 1a or the guiding groove 1b on the upper side wall 11 or the lower side wall 14 is greater than the depth of the inserting slot of the input terminal on the bottom wall 13, so as to ensure that the signal terminal is connected after the guiding installation is implemented.

A rack 2 for installing circuit breaker is opened in one side, and the circuit breaker inserts inside the rack 2 through open one side, the last lateral wall 11 or the lower lateral wall 14 of casing 1, or go up the lateral wall 11 and all contact the cooperation with the cabinet wall 21 of rack with lower lateral wall 14, be equipped with on cabinet wall 21 with direction boss 1a complex groove structure, or be equipped with direction recess 1b complex boss structure 2b, the last lateral wall 11 of casing 1 is preferred to contact the cooperation with the last lateral wall of rack, and the lower lateral wall 14 of casing 1 supports at the lower lateral wall, and the last lateral wall 11 of casing 1, lower lateral wall 14 and rack complex structure are not shown in the figure.

The lateral wall of the shell 1 is provided with a guiding and limiting structure, and the guiding and limiting structure is used for guiding the insertion of the breaker and limiting the displacement of the breaker in the cabinet 2. The direction limit structure is for setting up at last lateral wall 11 or the direction boss 1a of lateral wall 14 down, direction boss 1a specifically sets up under on lateral wall 14, in figure 1, the thickness of circuit breaker is 1U, the middle part of lateral wall 14 is equipped with one and is banding direction boss 1a down, direction boss 1a is located down on the central axis of lateral wall 14, the middle part of lateral wall 14 is equipped with the adjusting screw hole that is equipped with the bimetallic strip down, adjust the position of the inside bimetallic strip of circuit breaker through adjusting screw, the adjusting screw hole also can set up on lateral wall 11. In fig. 2, the thickness of the circuit breaker is 2U, the number of the strip-shaped guide bosses 1a arranged in the middle of the lower side wall 14 is two, the distance between the two guide bosses 1a is 1U, the distance between each guide boss 1a and the left edge or the right edge of the lower side wall 14 is 1/2U, a groove structure (not shown) is arranged on the lower cabinet wall matched with the lower side wall 14, the groove structure is matched with the guide bosses 1a, and the guide bosses 1a can slide to a specified installation position along the groove structure on the lower cabinet wall. Of course, the guiding protrusion 1a may also be disposed on the upper sidewall 11, and at this time, the groove structure matched with the guiding protrusion 1a is correspondingly disposed on the upper cabinet wall, or the guiding protrusion 1a is disposed on both the upper sidewall 11 and the lower sidewall 14, and the groove structures matched with the upper cabinet wall and the lower cabinet wall of the cabinet 2 are both disposed on both the upper cabinet wall and the lower cabinet wall.

Similarly, the guiding and limiting structure of the circuit breaker may also be a guiding groove 1b, and a second embodiment is provided in conjunction with fig. 3-4, where the guiding groove 1b is an open groove disposed on the upper sidewall 11, and an opening direction of the open groove faces the bottom wall 13, and the upper wall of the cabinet for mounting the circuit breaker is provided with a boss structure matched with the guiding groove 1 b. Preferably, the length of the guide groove 1b is three-quarters of the length of the upper side wall, the opening of the guide groove 1b extends to the bottom wall 13, and the length of the boss structure for fitting the guide groove 1b is preferably equal to the length of the guide groove 1b, but may be smaller than the length of the guide groove 1 b.

As shown in fig. 4 and 5, it is preferable that the circuit breaker is provided with an indication limiting structure, the indication limiting structure is matched with a cabinet for installing the circuit breaker, the indication limiting structure includes an indication boss 1c arranged on the upper side wall 11, and preferably, the indication boss 1c is located at a joint of the upper side wall 11 and the top wall 12; be equipped with at the cabinet wall 21 of rack be used for with instruct boss 1c complex instruct recess 2c, instruct recess 2c for setting up the open slot at cabinet wall 21 edge, instruct the uncovered direction of recess 2c and the open direction of rack unanimous, promptly with the circuit breaker insert the installation direction unanimous, instruct protruding 1c can follow the uncovered of instructing recess 2c and stretch into, when instructing the tank bottom of recess 2c and instructing boss 1c contact, show that the circuit breaker has installed in place, play the effect of instructing the circuit breaker installation to place and restrict the circuit breaker and produce the displacement in the inside of rack.

As an optimized design (not shown) of the indicating and limiting structure, a through hole which is consistent with the inserting direction of the circuit breaker is arranged in the middle of the indicating boss 1c, an indicating rod which correspondingly protrudes along the inserting direction of the circuit breaker is arranged in the middle of the bottom of the indicating groove 2c, when the circuit breaker is inserted into the cabinet, the indicating rod can slide through the through hole of the indicating boss 1c, when the end part of the indicating rod can be exposed from the through hole, the circuit breaker is installed in place, or a corresponding mark is arranged on the indicating rod, and the corresponding mark exposed on the indicating rod indicates that the circuit breaker is installed in place.

When the indicating groove 2c is a groove structure penetrating through the cabinet wall 21 as shown in fig. 3, whether the indicating groove is mounted in place can be judged by only observing the matching condition between the side of the indicating boss 1c close to the bottom wall 13 and the groove bottom of the indicating groove 2c, but when the indicating groove 2c is an open groove arranged only on the inner side of the cabinet wall 21 or the groove bottom of the indicating groove 2c is shielded by parts, whether the indicating groove is matched in place cannot be observed from the outside of the cabinet, so that the indicating rod needs to be arranged to realize the indicating function.

As another optimized structure (not shown) of the indicating and limiting structure, the indicating and limiting structure includes an indicating groove disposed on the upper side wall 11, and of course, the indicating and limiting structure may also be disposed on the lower side wall 14 correspondingly, a protruding structure is disposed at the joint of the upper side wall 11 and the top wall 12, a groove is disposed on one side of the protruding structure away from the top wall 12 as the indicating groove, an indicating boss matched with the indicating groove is disposed on the edge of the cabinet wall 21, and when the indicating boss completely extends into the indicating groove, the indicating boss is not visible from the outside, and the indicating boss is matched with the indicating groove.

Another indicating structure (not shown) of the present embodiment is provided, an indicating boss 1c matching with the indicating groove 2c (see the indicating groove 2c of fig. 3) is not provided on the upper side wall 11 of the circuit breaker, and an indicating mark is provided only on the corresponding area of the upper side wall 11, and when the indicating mark is located in the indicating groove 2c, it indicates that the circuit breaker is installed in place, but the structure without the indicating boss 1c cannot play a limiting role.

The cabinet 2 described in this embodiment includes four cabinet walls 21 and one cabinet bottom, and a mounting cavity with one open side is enclosed by the four cabinet walls 21 and the one cabinet bottom, a plurality of circuit breakers are installed in the mounting cavity, and no partition board for separating the plurality of circuit breakers is arranged in the mounting cavity, the four cabinet walls 21 for forming a chamber include two oppositely arranged narrow cabinet walls and two oppositely arranged wide cabinet walls, the two narrow cabinet walls are respectively a left cabinet wall and a right cabinet wall, the two oppositely arranged wide cabinet walls are respectively an upper cabinet wall and a lower cabinet wall, a plurality of boss structures are arranged on one of the wide cabinet walls, namely the upper cabinet wall, the plurality of boss structures are equidistantly arranged along the width direction of the upper cabinet wall for being matched with the guide grooves 1b of the plurality of circuit breakers, and a plurality of open grooves are arranged at the edge of the wide cabinet wall provided with the boss structures as the indication grooves 2c for indicating that the circuit breakers are installed in place, the plurality of open slots are arranged at equal intervals along the width direction of the wide cabinet wall, and the plurality of open slots enable the edge of the wide cabinet wall to be in a comb-tooth shape.

When a plurality of circuit breakers are inserted into a cabinet, the lower side wall 14 of the shell 1 of each circuit breaker is supported on the lower wall of the cabinet, the upper side wall 11 of each circuit breaker is in contact fit with the upper wall of the cabinet, and the guide groove 1b of the upper side wall 11 is matched with the boss structure 2b of the upper wall 21 to play a role in guiding and limiting; after the circuit breaker is installed in place, the indicating boss 1c on the upper side wall 11 of the circuit breaker extends into the indicating groove 2c to play the role of indicating and limiting. The installation cavity of the cabinet is not provided with a partition board for separating a plurality of circuit breakers, and the circuit breakers are tightly attached to the cabinet side by side, so that the structure is compact, and the appearance is neat and attractive.

The circuit breaker is further provided with a locking structure, the locking structure is matched with a cabinet wall 21 of a cabinet for mounting the circuit breaker, the locking structure is shown in fig. 3-4, the locking structure comprises a locking protrusion 1d protruding out of the upper side wall 11 and a clamping groove 2d arranged on the cabinet wall 21 and used for being clamped with the locking protrusion 1d, a locking piece and an elastic piece matched with the locking piece are arranged in the shell 1 of the circuit breaker, the elastic force of the elastic piece drives the locking protrusion 1d on the locking piece to protrude out of the upper side wall 11 of the shell 1, and the locking protrusion 1d can be retracted into the shell 1 of the circuit breaker by pressing the locking protrusion 1d with the force vertical to the direction of the upper side wall 11 and overcoming the elastic force of the elastic piece; locking arch 1d is located between direction recess 1b and the instruction boss 1c, one side that locking arch 1d is close to cabinet wall 21 is the inclined plane, draw-in groove 2d is located between boss structure and the instruction recess 2c, when the installation circuit breaker, cabinet wall 21 presses locking arch 1d with the cooperation of last lateral wall 11, make in the casing 1 of the protruding 1d withdrawal circuit breaker of locking, when locking arch 1d moves to corresponding draw-in groove 2d position, cabinet wall 21 can not continue to exert pressure to locking arch 1d, locking arch 1d card this moment is gone into in draw-in groove 2d for the circuit breaker can not be extracted at will. Preferably, one side of the locking protrusion 1d close to the cabinet wall 21 is an inclined surface, and one side of the locking protrusion far away from the upper cabinet wall 21 is a straight surface, the inclined surface is beneficial to the locking protrusion 1d to slide along the inner side of the cabinet wall 21, and the straight surface limits the separation of the locking protrusion 1d and the clamping groove 2 d. As shown in fig. 3, after the circuit breaker is installed in place, the locking protrusion 1d on the housing 1 of the circuit breaker is clamped into the clamping slot 2d of the cabinet wall 21, and at this time, the circuit breaker cannot be easily pulled out. Further, be equipped with the deblocking piece in the roof 12 one side of circuit breaker, the cooperation of deblocking piece and the locking piece in the circuit breaker can drive the locking piece and overcome the elasticity of elastic component through pressing or pulling the deblocking piece, makes in the protruding 1d withdrawal casing 1 of locking, can extract the circuit breaker this moment.

The size and the dimension of the preferred locking structure are smaller than those of the guiding limiting structures, the locking structure is located between the guiding limiting structures and the indicating limiting structures, and the central axes of the preferred locking structure, the indicating limiting structures and the guiding limiting structures are not overlapped, so that the stability of the circuit breaker in the cabinet is enhanced.

A third embodiment is provided in conjunction with fig. 5, and differs from the first embodiment in that in this embodiment the locking structure serves as a structure for indicating the installation in place, as shown in fig. 5, the locking structure is located on a side close to the top wall 12, and the guide limit structure is located on a side close to the bottom wall 13. The locking structure comprises a locking protrusion 1d and a clamping groove 2d as in the second embodiment, and after the circuit breaker is installed in place, the locking protrusion 1d is clamped into the clamping groove 2d to prevent the circuit breaker from being pulled out randomly. Referring to fig. 3 and 5, the guiding grooves 1b are the same as the second embodiment, and are all open grooves formed in the upper side wall 11, and the openings extend toward the bottom wall 13, and a boss structure matched with the guiding grooves 1b is convexly formed in the inner side of the upper cabinet wall 21, and the boss structure can extend into the opening of the guiding grooves 1b, as in the second embodiment, preferably, the length of the guiding grooves 1b accounts for one half to three quarters of the length of the upper side wall 11, and the length of the boss structure matched with the guiding grooves 1b is less than or equal to the length of the guiding grooves 1b, and this guiding and limiting structure can provide a guiding function in the installation process of the circuit breaker, and can enhance the installation stability of the circuit breaker in the cabinet and prevent the circuit breaker from shaking in the cabinet.

In the present embodiment, the cabinet includes four cabinet walls 21 and a cabinet bottom, similar to the second embodiment, and the four cabinet walls 21 and the cabinet bottom enclose an installation cavity with one side opened, a plurality of circuit breakers are installed in the installation cavity and a partition plate for separating the circuit breakers is not arranged in the installation cavity, the four cabinet walls 21 for forming the chamber comprise two oppositely arranged narrow cabinet walls and two oppositely arranged wide cabinet walls, a plurality of boss structures which are used for being matched with the guide grooves 1b are arranged on one wide cabinet wall as an upper cabinet wall, the plurality of boss structures are arranged at equal intervals along the width direction of the upper cabinet wall and are used for being matched with the guide grooves 1b of the plurality of circuit breakers, and the cabinet wall 21 provided with the boss structure is provided with a plurality of clamping grooves 2d used for clamping with the locking protrusions 1d, and the edge of the cabinet wall 21 is a flat edge because the indicating groove 2c is not arranged.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all should be considered as belonging to the protection scope of the invention.