CN217641146U - Plug-in circuit breaker - Google Patents

Abstract

The utility model provides a plug-in circuit breaker, includes circuit breaker casing and the locking mechanical system of setting in the circuit breaker casing, locking mechanical system includes the locking piece, and the locking piece is equipped with can stretch out the locking arch outside the circuit breaker casing and in the withdrawal circuit breaker casing, still including being used for exerting the drawing mechanism who draws the effort to plug-in circuit breaker, is equipped with the sliding hole on at least one lateral wall of circuit breaker casing, be equipped with the guide slot on the locking piece, the guide slot includes the slope guide slot that sets up for the direction slope that plug-in circuit breaker inserted the rack, drawing mechanism includes and stretches into the drive structure in the circuit breaker casing through the sliding hole from the circuit breaker casing is external, and drive structure passes in the sliding hole inserts the guide slot, and when exerting the pulling force through drawing mechanism, drive structure's slip drives the locking piece through slope guide slot and removes, makes the protruding withdrawal circuit breaker casing of locking to extract plug-in circuit breaker, easily installation and change.

Description

Plug-in circuit breaker

Technical Field

The invention relates to the field of low-voltage electric appliances, in particular to a plug-in circuit breaker.

Background

Along with the development of communication technology, the communication cabinet further provides requirements for the height direction and the installation mode of the circuit breaker, the power distribution space of the equipment is further compressed, the circuit breaker with the size and the height of 1U and the plug-in installation mode conform to the trend, but most of the existing plug-in circuit breakers with the size of 1U are difficult to take out and operate after being installed in the cabinet. The plug-in circuit breakers are inserted into a cabinet side by side, when the circuit breakers are taken out, the circuit breakers are taken out from the cabinet by drawing the opening and closing buttons of the circuit breakers, and the height and the thickness of the circuit breakers, which are exposed out of an operation surface of the cabinet, are about 4cm and 2cm respectively (the circuit breakers can be thicker or thinner of course), and the buttons are smaller, so that the circuit breakers are inconvenient to pull, and the mistaken switching-on or switching-off operation is easy to cause.

The existing plug-in circuit breaker adopting a handle as a switching-on and switching-off operation part usually needs to be provided with an independent unlocking mechanism and/or a drawing mechanism on a circuit breaker shell, and the cost is high.

In addition, when the multipolar plug-in circuit breaker is formed by splicing a plurality of independent circuit breaker poles side by side, each circuit breaker pole is internally provided with an independent drawing mechanism, the drawing mechanisms of the circuit breaker poles are required to be spliced together through an additional structure, the structure is more complex, the occupied space is also larger, and the use is inconvenient.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a plug-in circuit breaker.

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

the utility model provides a plug-in circuit breaker, includes circuit breaker casing and the locking mechanical system of setting in the circuit breaker casing, locking mechanical system includes the locking piece, and the locking piece is equipped with can stretch out the locking arch outside the circuit breaker casing and in the withdrawal circuit breaker casing, still including being used for exerting the drawing mechanism who draws the effort to plug-in circuit breaker, is equipped with the sliding hole on at least one lateral wall of circuit breaker casing, be equipped with the guide slot on the locking piece, the guide slot includes the slope guide slot that sets up for the direction slope that plug-in circuit breaker inserted the rack, drawing mechanism includes and stretches into the drive structure in the circuit breaker casing through the sliding hole from the circuit breaker casing is external, and drive structure passes in the sliding hole inserts the guide slot, and when exerting the pulling force through drawing mechanism, drive structure's slip drives the locking piece through slope guide slot and removes, makes the protruding withdrawal circuit breaker casing of locking to extract plug-in the circuit breaker.

Preferably, the guide groove comprises a first straight guide groove, an inclined guide groove and a second straight guide groove which are communicated in sequence, the first straight guide groove and the second straight guide groove are arranged in parallel and are parallel to the direction in which the plug-in circuit breaker is inserted into the cabinet, and the inclined guide groove is obliquely arranged and communicated with the first straight guide groove and the second straight guide groove.

Preferably, the driving structure includes a driving protrusion, and the driving protrusion protrudes into the inside of the circuit breaker housing from the sliding hole.

Preferably, the drawing mechanism comprises a drawing part, the drawing part comprises an operating rod and two connecting rods, one end of each connecting rod is connected with the operating rod, and the end parts of the two connecting rods are oppositely provided with driving convex rods serving as driving structures in a bending mode.

Preferably, the locking piece is arranged in the breaker shell in a linear sliding mode, the elastic piece drives the locking piece to slide linearly to enable the locking protrusion to extend out of the breaker shell, the locking protrusion is arranged on the top side of the locking piece, the driving arm is arranged on one side of the locking piece in an extending mode, the driving arm is provided with the guide groove, the inclined guide groove is inclined towards the top side close to the locking protrusion gradually along the pulling-out direction of the plug-in type breaker, the driving structure slides to drive the locking piece to move into the breaker shell through the inclined guide groove, and the locking protrusion retracts into the breaker shell.

Preferably, the locking piece is rotatably arranged in the breaker shell, a locking protrusion is arranged on the top side of one end of the locking piece, a driving arm is arranged at the other end of the locking piece in an extending mode, the elastic piece drives the locking piece to rotate to enable the locking protrusion to extend out of the breaker shell, the driving arm is provided with the guide groove, the inclined guide groove is inclined towards the direction far away from the locking protrusion gradually along the pulling-out direction of the plug-in breaker, and the driving structure slides to drive the locking piece to rotate through the inclined guide groove to enable the locking protrusion to retract into the breaker shell.

Preferably, the circuit breaker casing is including relative operating surface and the rear end face that sets up, relative last lateral wall and the lower lateral wall that sets up to and two lateral walls that set up relatively, be equipped with the operating parts that are used for driving circuit breaker divide-shut brake on the operating surface go up and be equipped with the locking hole on lateral wall and/or the lower lateral wall, the locking arch stretches out from the locking hole, all is equipped with on two lateral walls the sliding hole, the sliding hole is rectangular shape, and its length direction is parallel with the direction that plug-in circuit breaker inserted the rack, the plane of perpendicular to operating surface place.

Preferably, the drawing mechanism comprises an operation structure, a driving structure and a connection structure connected between the operation structure and the driving structure, the operation structure corresponds to the operation surface of the shell of the circuit breaker, the operation part is a handle, and the handle shields the operation structure when rotating to a switching-on position and avoids the operation structure when rotating to a switching-off position.

Preferably, still be equipped with first holding tank on at least one lateral wall of circuit breaker casing for hold the connection structure of drawing mechanism, the slip hole sets up in first holding tank, and/or, be equipped with the second holding tank on the operating surface of circuit breaker casing for hold at least partial operation structure.

Preferably, the circuit breaker comprises a plurality of circuit breaker poles, each circuit breaker pole comprises a circuit breaker shell, the side walls of the two sides of each circuit breaker shell are respectively provided with the sliding hole, the circuit breaker shells of the circuit breaker poles are arranged side by side, and the sliding holes are correspondingly arranged; the guide slot of locking piece runs through the locking piece, draw the mechanism including drawing the piece and as the linkage of drawing of drive structure, draw the guide slot that the linkage runs through the sliding hole of a plurality of circuit breaker casings and locking piece, draw the linkage and draw a connection.

According to the plug-in circuit breaker, the side wall of the circuit breaker shell is provided with the sliding hole, the locking piece is provided with the guide groove, so that the driving structure of the drawing mechanism can be inserted into the circuit breaker shell from the outer side of the circuit breaker shell and inserted into the guide groove, when the drawing mechanism applies drawing force and drives the driving structure to slide along the sliding hole, the locking mechanism is driven to unlock through the inclined guide groove of the guide groove, and meanwhile, the plug-in circuit breaker is drawn out, so that the structure is simple and convenient, and the plug-in circuit breaker is easy to install and replace.

Particularly, the corresponding drawing mechanism can be replaced on the outer side of the plug-in circuit breaker of a single circuit breaker pole or a multi-pole plug-in circuit breaker formed by assembling a plurality of circuit breaker poles side by side, so that the drawing mechanism can form an integrated structure and is easy to install and replace.

In addition, draw the mechanism including drawing the piece, still including drawing the linkage, draw the sliding hole that the linkage passed adjacent lateral wall of adjacent circuit breaker casing, through drawing the locking mechanical system of linkage a plurality of circuit breaker utmost point to the locking mechanical system synchronous unlocking of multipolar plug-in circuit breaker of synchronous drive, and pull out multipolar plug-in circuit breaker from the rack in step.

Drawings

Fig. 1 is a schematic structural view of a circuit breaker housing and a drawing mechanism of an embodiment;

fig. 2 is a schematic structural view of a circuit breaker case of the embodiment, with the drawing mechanism of fig. 1 removed;

fig. 3 is a schematic structural view of a locking mechanism and a pulling mechanism in a case of the circuit breaker of the embodiment, in which the locking mechanism is in a locked state;

fig. 4 is a schematic structural view of a locking mechanism and a pulling mechanism in a circuit breaker housing of an embodiment, with the locking mechanism in an unlocked state;

FIG. 5 is a schematic structural view of the locking member of the embodiment;

fig. 6 is a schematic structural view of a drawing member of the embodiment.

Detailed Description

The following description will further describe the embodiments of the plug-in circuit breaker according to the present invention with reference to the embodiments shown in the drawings. The inventive plug-in circuit breaker is not limited to the description of the following embodiments.

As shown in fig. 1-2, the plug-in circuit breaker includes a circuit breaker housing 4, and an operating mechanism, a moving contact, a stationary contact, a protection mechanism, and a locking mechanism 2 disposed in the circuit breaker housing 4. The circuit breaker housing 4 is a cuboid structure including an operating surface and a rear end surface which are oppositely arranged, an upper side wall and a lower side wall which are oppositely arranged, and two side walls which are oppositely arranged, wherein the two side walls, the upper side wall and the lower side wall are connected between the operating surface and the rear end surface. An operating part 3 for driving the circuit breaker to open the brake is arranged on the operating surface, the operating part 3 is connected with an operating mechanism, the operating part 3 can be a handle or a button, a wiring terminal is arranged on the rear end surface and is used for being in plug-in fit with a bus bar in the cabinet, an indicating window can be further arranged on the operating surface to indicate the opening and closing states of the circuit breaker, the wiring terminal can be arranged on the operating surface or not, the plug-in circuit breaker is inserted into the cabinet, and only the operating surface is exposed out of the cabinet; go up and be equipped with the locking hole on lateral wall and/or the lower lateral wall, locking mechanical system 2 is including can stretching out the protruding 24 of locking in the outer and withdrawal circuit breaker casing 4 of circuit breaker casing 4, locking protruding 24 stretches out from the locking hole and is used for with the spacing cooperation of rack, with the spacing locking of plug-in circuit breaker in the rack, when locking protruding 24 withdraws circuit breaker casing 4 from the locking hole in, can extract plug-in circuit breaker from the rack, usually the operation face is the length direction of circuit breaker in the direction of rear end face, and the direction of going up the downward lateral wall of lateral wall is the direction of height of circuit breaker, and the direction between two lateral walls is the width direction of circuit breaker, and this is prior art, no longer gives unnecessary details.

As shown in fig. 3 to 6, an improvement of the present application is that it further comprises a pulling mechanism 1 for pulling the plug-in circuit breaker out of the cabinet, for applying a pulling force to the plug-in circuit breaker; be equipped with the slide opening on at least one lateral wall of circuit breaker casing 4, locking mechanical system 2 includes locking piece 20, and locking piece 20 is equipped with and can stretches out the locking arch in the outer and withdrawal circuit breaker casing 4 of circuit breaker casing 20 be equipped with guide slot 25 on the locking piece 20, guide slot 25 includes the slope guide slot 252 that sets up for the direction slope that plug-in circuit breaker inserted the rack, drawing mechanism 1 includes the drive structure who stretches into circuit breaker casing 4 through the slide opening from circuit breaker casing 4 is outer, and drive structure passes in the slide opening inserts guide slot 25, and when exerting the pulling force through drawing mechanism 1, the slip of drive structure drives locking 20 through slope guide slot 252 and removes, makes in the protruding 24 withdrawal circuit breaker casing 4 of locking, exerts the pulling force to plug-in circuit breaker simultaneously to extract plug-in circuit breaker.

The plug-in circuit breaker is provided with the independent drawing mechanism 1, the misoperation of opening and closing can be avoided, the side wall of the circuit breaker shell 4 is provided with the sliding hole, the locking piece 20 is provided with the guide groove 25, so that the driving structure of the drawing mechanism 1 can be inserted into the circuit breaker shell 4 from the outer side of the circuit breaker shell 4 and inserted into the guide groove 25, when the drawing mechanism 1 applies drawing force and drives the driving structure to slide along the sliding hole, the locking mechanism 2 is driven to unlock through the inclined guide groove 252 of the guide groove 25, and the plug-in circuit breaker is simultaneously pulled out.

As shown in fig. 6, the drawing mechanism 1 includes an operating structure for applying a drawing force manually and by means of a tool, a driving structure and a connecting structure connected between the operating structure and the driving structure, and the operating structure is disposed corresponding to an operating surface of the circuit breaker case 4 so as to be operated. Preferably, the operating part 3 is a handle, the handle is rotated to a switching-on position to shield the operating structure, and the operating structure is avoided when the operating part is rotated to a switching-off position to ensure that the pulling mechanism 1 can be operated when the breaker is switched off. As shown in fig. 1-2, this is the state when the circuit breaker is opened.

As shown in fig. 6, the drawing mechanism 1 of the present embodiment includes a drawing member 10, the drawing member 10 includes an operation rod 105 as an operation structure and a connection rod 103 as a connection structure, one end of the two connection rods 103 is respectively connected with the operation rod 105 to form a U-shaped structure, the end portions of the two connection rods 103 are oppositely bent to form a driving protruding rod 101 as a driving structure, and the driving protruding rod 101 passes through a sliding hole and extends into the inside of the circuit breaker housing 4 to be in spacing fit with the plug-in circuit breaker, so as to be used for pulling out the plug-in circuit breaker. In particular, the driving protrusion 101 can also slide in the sliding hole to directly or indirectly drive the locking mechanism 2 to unlock, even if the locking protrusion 24 retracts into the circuit breaker housing 4, to release the limit of the plug-in circuit breaker and the cabinet.

As shown in fig. 1-2, an operation member 3 is provided on an operation surface of a circuit breaker housing 4, a connection terminal is provided on a rear end surface opposite to the operation surface, a locking hole is provided on an upper side wall of the circuit breaker housing 4, a locking protrusion 24 in the circuit breaker housing 4 extends out from the locking hole, sliding holes are provided on both side walls of the circuit breaker housing 4, and a driving protrusion rod 101 extends into the circuit breaker housing 4 from the sliding hole. The sliding hole is long-strip-shaped, the length direction of the sliding hole is parallel to the direction of the plug-in type circuit breaker inserted into the cabinet, and the sliding hole is perpendicular to the plane of the operation face.

The operating rod 105 and the connecting rods 103 are located outside the circuit breaker shell 4, the operating rod 105 is located on the operating surface side, manual pulling or pulling by means of a tool is facilitated, and the two connecting rods 103 correspond to the side walls on the two sides of the circuit breaker shell 4 respectively. The operating rod 105 described in this embodiment is a straight rod-shaped structure, and can be bent into a V-shape or an arc shape as required, and the drawing member 10 can further be provided with a handle, a pull ring, or a drag hook, etc. connected to the operating rod 105, which are convenient for operation, as the operating structure.

Preferably, still be equipped with first holding tank 133 on at least one in the both sides lateral wall of circuit breaker casing 4 for hold the connection structure of drawing mechanism 1, the slip hole sets up in first holding tank 133, and connection structure can be spacing slip in first holding tank 133, and makes connection structure not bulge in the both sides lateral wall of circuit breaker casing 4, does not influence plug-in circuit breaker's width, does not influence a plurality of plug-in circuit breakers and splices side by side into a multipole circuit breaker. The length of the first receiving groove 133 may be greater than or equal to the length of the sliding hole. Preferably, the operating surface of the circuit breaker housing 4 is further provided with a second receiving groove 135 for receiving at least a portion of the operating structure. The second receiving groove 135 of the present embodiment is used to receive the entire operation rod 105 as an operation structure, and a notch is provided on the second receiving groove 135 to facilitate pulling the operation rod 105.

As shown in fig. 3-4, the locking mechanism 2 of the present embodiment includes a locking member 20 and an elastic member (not shown in the drawings), the locking member 20 is rotatably or slidably mounted in the circuit breaker housing 4, the locking member 20 is provided with a locking protrusion 24 and a guide slot 25, and the elastic member drives the locking member 20 to move so that the locking protrusion 24 extends out of the circuit breaker housing 4; the driving protrusion 101 of the drawing member 10 is inserted into the guide groove 25 of the locking member 20 through the sliding hole, and the sliding of the driving protrusion 101 acts on the locking member 20 through the guide groove 25 to slide or rotate the locking member 20, so that the locking protrusion 24 is retracted into the circuit breaker housing 4. The guide groove 25 includes an inclined guide groove 252 obliquely arranged with respect to the sliding direction of the driving protrusion 101, that is, the inclined guide groove 252 is obliquely arranged with respect to the direction of inserting or extracting the plug-in type circuit breaker into or from the cabinet, and the driving protrusion 101 horizontally slides in the direction of the sliding hole while applying a force to the locking member 20 through the inclined guide groove 252, and the locking member 20 moves against the force of the elastic member, so that the locking protrusion 24 retracts into the circuit breaker housing 4.

Preferably, the guide groove 25 includes a first straight guide groove 251, an inclined guide groove 252 and a second straight guide groove 253 which are communicated in sequence, the first straight guide groove 251 and the second straight guide groove 253 are arranged in parallel and are parallel to the inserting direction of the plug-in circuit breaker into the cabinet and the length direction of the sliding hole, and the inclined guide groove 252 is arranged in inclined mode and is communicated with the first straight guide groove 251 and the second straight guide groove 253. As shown in fig. 4, when the driving protrusion 101 slides along the sliding hole, it is restricted by the sliding hole to slide straightly, and the pulling member 10 is pressed down by the inclined guide groove 252 and the second straight guide groove 253, so that the pulling member 10 rotates or slides against the force of the elastic member, and the locking protrusion 24 retracts into the circuit breaker housing 4.

As shown in the embodiment of fig. 3-4, the locking member 20 is linearly slidably disposed in the circuit breaker housing 4, the elastic member drives the locking member 20 to linearly slide so that the locking protrusion 24 protrudes out of the circuit breaker housing 4, and the sliding direction of the locking member 20 is perpendicular to the insertion direction of the circuit breaker into the cabinet. The locking projection 24 is convexly arranged on the top side of the locking piece 20, the driving arm is arranged on one side of the locking piece 20 in an extending mode, the driving arm and the locking piece 20 integrally slide up and down in a straight line mode, and the guide groove 25 is arranged on the driving arm. Preferably, the guide grooves 25 are formed on both sides of the driving arm, the inclined guide groove 252 is inclined gradually toward the top side close to the locking protrusion 24 along the plug-in type circuit breaker drawing direction, that is, inclined gradually upward, and when the driving protrusion 101 horizontally and straightly slides along the sliding hole, the locking member 20 is driven to move into the circuit breaker housing 4 by pressing down the locking member 20 through the lower side wall of the inclined guide groove 252, so that the locking protrusion 24 is retracted into the circuit breaker housing 4. After unlocking the locking mechanism 2, the cam 101 is driven to slide to the end of the sliding hole, and the plug-in circuit breaker is continuously pulled out of the cabinet through the pulling piece 10; alternatively, the driving protrusion 101 slides to the end of the guiding groove 25, and continues to apply a drawing force through the drawing member 10, and the driving protrusion 101 applies a drawing force to the circuit breaker housing 4 through the locking member 20, so as to draw the plug-in circuit breaker out of the cabinet. When the pulling member 10 and the driving convex rod 101 are reset, the elastic member drives the locking member 20 to reset and the locking protrusion 24 extends out of the circuit breaker shell 4.

In another embodiment, the locking member 20 is rotatably installed in the circuit breaker housing 4, the top side of one end of the locking member is provided with the locking protrusion 24 in a protruding manner, the other end of the locking member is provided with a driving arm in an extending manner, at least one guide slot 25 is provided on the driving arm, the inclined guide slot 252 is gradually inclined in a direction away from the locking protrusion 24 along the pulling direction of the plug-in circuit breaker, i.e., gradually inclined downwards, and when the driving protrusion rod 101 horizontally and straightly slides along the sliding hole, the driving arm is lifted by inclining the upper side wall of the guide slot 252, so that the locking member 20 rotates counterclockwise and the locking protrusion 24 retracts into the circuit breaker housing 4. When the pulling member 10 and the driving cam 101 are reset, the elastic member drives the locking member 20 to rotate and the locking protrusion 24 extends out of the circuit breaker housing 4. The elastic element can be various elastic elements such as a pressure spring, a torsion spring, a leaf spring and the like.

It should be noted that the fitting structure of the plug-in circuit breaker and the drawing mechanism 1 of the present embodiment is suitable for not only a single-pole plug-in circuit breaker but also a multi-pole plug-in circuit breaker. The multi-pole plug-in circuit breaker comprises a plurality of circuit breaker poles arranged side by side, each circuit breaker pole comprises a circuit breaker shell 4, namely the circuit breaker shells 4 shown in figure 1 are arranged side by side, and each circuit breaker shell 4 comprises an operating mechanism, a moving contact, a fixed contact, a protection mechanism, a locking mechanism 2 and other elements; the both sides lateral wall of circuit breaker casing 4 all is equipped with the slide opening, the circuit breaker casing 4 of a plurality of circuit breaker utmost point set up side by side, and adjacent circuit breaker casing 4's lateral wall is hugged closely, and the slide opening correspondence sets up, the operating parts 3 linkage of a plurality of circuit breaker utmost points.

In an embodiment, the guide groove 25 of the locking member 20 penetrates through the locking member 20, the pulling mechanism 1 includes the pulling member 10 and a pulling linkage member (not shown in the figure), the pulling linkage member is a linkage rod with a long length, penetrates through the sliding holes of the plurality of circuit breaker housings 4 and the guide groove 25 of the locking member 20, and is connected with the pulling member 10, and of course, the length of the corresponding operating rod 105 is also long and slightly greater than the sum of the widths of the plurality of circuit breaker housings 4. The drawing linkage piece is used as the driving structure of the drawing mechanism 1, or the drawing linkage piece and the driving convex rod 101 are used as the driving structure together, two ends of the drawing linkage piece are connected with the driving convex rods 101 at two ends of the drawing piece 10, the locking piece 20 of the multi-pole plug-in circuit breaker is linked through the drawing linkage piece, the locking mechanism 2 of the multi-pole plug-in circuit breaker can be driven to unlock through the drawing piece 10 at the same time, and the multi-pole plug-in circuit breaker is pulled out of the cabinet. The pulling link may be integrally formed with the pulling member 10. Of course, for the convenience of assembly, the pulling linkage member may be a separate component from the pulling member 10 and then assembled together, for example, by driving the protruding rod 101 and the pulling linkage member to directly insert through the shaft hole, or the pulling linkage member may be connected to the pulling member 10 by a connector. According to the circuit breaker for two poles, three poles, four poles or more, the corresponding drawing piece 10 and drawing linkage piece can be replaced from the outside, the plug-in circuit breaker for matching different poles can be replaced from the outside, the corresponding drawing mechanism 1 can be replaced from the outside, so that the drawing mechanism 1 can form an integrated structure, and is easy to install and replace.

It should be noted that the above description is a detailed description of the present invention with reference to specific preferred embodiments, and the present invention is not to be considered as limited to the specific embodiments. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the inventive concept, and all should be considered as falling within the protection scope of the invention.

It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship usually placed when used, which is only for convenience of description and does not indicate that the device or element referred to must have a specific orientation, and therefore, should not be construed as limiting the present invention. Moreover, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating relative importance.

Claims (10)

1. A plug-in circuit breaker, includes circuit breaker casing (4) and locking mechanical system (2) of setting in circuit breaker casing (4), locking mechanical system (2) include locking piece (20), and locking piece (20) are equipped with can stretch out the circuit breaker casing (4) outside and retract the locking arch in circuit breaker casing (4), its characterized in that:

still including being used for exerting drawing mechanism (1) of drawing effort to plug-in circuit breaker, be equipped with the slip hole on at least one lateral wall of circuit breaker casing (4), be equipped with guide slot (25) on locking piece (20), guide slot (25) include slope guide slot (252) that the direction slope that inserts the rack for plug-in circuit breaker set up, drawing mechanism (1) includes the drive structure that stretches into circuit breaker casing (4) through the slip hole outside from circuit breaker casing (4), and the drive structure passes in the slip hole inserts guide slot (25), when exerting the pulling force through drawing mechanism (1), the slip of drive structure removes through slope guide slot (252) drive locking piece (20), makes in locking protruding (24) retraction circuit breaker casing (4) to extract plug-in circuit breaker.

2. Plug-in circuit breaker according to claim 1, characterized in that: the guide groove (25) comprises a first straight guide groove (251), an inclined guide groove (252) and a second straight guide groove (253) which are communicated in sequence, the first straight guide groove (251) and the second straight guide groove (253) are arranged in parallel and are parallel to the direction in which the plug-in circuit breaker is inserted into the cabinet, and the inclined guide groove (252) is obliquely arranged and communicated with the first straight guide groove (251) and the second straight guide groove (253).

3. Plug-in circuit breaker according to claim 1, characterized in that: the driving structure comprises a driving convex rod (101), and the driving convex rod (101) extends into the interior of the breaker shell (4) from the sliding hole.

4. Plug-in circuit breaker according to claim 1, characterized in that: the drawing mechanism (1) comprises a drawing part (10), the drawing part (10) comprises an operating rod (105) and two connecting rods (103), one ends of the two connecting rods (103) are respectively connected with the operating rod (105), and the end parts of the two connecting rods (103) are oppositely bent to form driving convex rods (101) serving as driving structures.

5. Plug-in circuit breaker according to claim 1, characterized in that: the locking piece (20) is arranged in the breaker shell (4) in a linear sliding mode, the elastic piece drives the locking piece (20) to slide linearly to enable the locking protrusion (24) to extend out of the breaker shell (4), the locking protrusion (24) is arranged on the top side of the locking piece (20), a driving arm is arranged on one side of the locking piece (20) in an extending mode, the driving arm is provided with the guide groove (25), the inclined guide groove (252) inclines towards the top side close to the locking protrusion (24) gradually along the plug-in breaker pulling-out direction, the driving structure slides to drive the locking piece (20) to move towards the breaker shell (4) through the inclined guide groove (252), and the locking protrusion (24) retracts into the breaker shell (4).

6. Plug-in circuit breaker according to claim 1, characterized in that: the locking piece (20) is rotatably arranged in the breaker shell (4), a locking protrusion (24) is arranged on the top side of one end, a driving arm is arranged at the other end in an extending mode, the elastic piece drives the locking piece (20) to rotate to enable the locking protrusion (24) to extend out of the breaker shell (4), the driving arm is provided with a guide groove (25), the inclined guide groove (252) inclines towards the direction far away from the locking protrusion (24) gradually along the pulling-out direction of the plug-in breaker, the driving structure slides to drive the locking piece (20) to rotate through the inclined guide groove (252), and the locking protrusion (24) retracts into the breaker shell (4).

7. Plug-in circuit breaker according to claim 1, characterized in that: breaker housing (4) are equipped with operating parts (3) that are used for driving the breaker divide-shut brake including relative operating surface and the rear end face that sets up, relative last lateral wall and the lower lateral wall that sets up to and two lateral walls that set up relatively on the operating surface go up and be equipped with the locking hole on lateral wall and/or the lower lateral wall, locking arch (24) are stretched out from the locking hole, all are equipped with on two lateral walls the sliding hole, the sliding hole is rectangular shape, and its length direction is parallel with the direction that plug-in circuit breaker inserted the rack, perpendicular to operating surface place plane.

8. Plug-in circuit breaker according to claim 7, characterized in that: draw mechanism (1) including operation structure, drive structure and connect the connection structure between operation structure and drive structure, operation structure corresponds the operating surface setting of circuit breaker casing (4), operating parts (3) are the handle, shelter from when the handle rotates the on-off position operation structure dodges when rotating the off position operation structure.

9. Plug-in circuit breaker according to claim 8, characterized in that: still be equipped with first holding tank (133) on at least one lateral wall of circuit breaker casing (4) for hold the connection structure of drawing mechanism (1), the slip hole sets up in first holding tank (133), and/or, be equipped with second holding tank (135) on the operating surface of circuit breaker casing (4) for hold at least partial operation structure.

10. Plug-in circuit breaker according to one of claims 1 to 9, characterized in that: the circuit breaker comprises a plurality of circuit breaker poles, each circuit breaker pole comprises a circuit breaker shell (4), the side walls of two sides of each circuit breaker shell (4) are respectively provided with the sliding hole, the circuit breaker shells (4) of the circuit breaker poles are arranged side by side, and the sliding holes are correspondingly arranged; guide slot (25) of locking piece (20) run through locking piece (20), draw mechanism (1) including drawing piece (10) and drawing the linkage as drive structure, draw the guide slot (25) that the linkage runs through the sliding hole of a plurality of circuit breaker casings (4) and locking piece (20), draw the linkage and draw piece (10) and be connected.

Images