Plug-in circuit breaker

Abstract

The utility model provides an insertion type circuit breaker, including circuit breaker housing and the locking mechanism who sets up in circuit breaker housing, locking mechanism includes the locking protrusion who can extend outside circuit breaker housing and retract inside circuit breaker housing, still including the pulling mechanism for exerting pulling force to insertion type circuit breaker, is equipped with sliding hole on at least one lateral wall of circuit breaker housing, the pulling mechanism includes the drive structure who extends into circuit breaker housing from outside circuit breaker housing through sliding hole, drive structure can slide in sliding hole, drive locking mechanism makes locking protrusion retract inside circuit breaker housing to pull out insertion type circuit breaker, the drive structure of pulling mechanism can be installed into circuit breaker housing from outside circuit breaker housing for drive locking mechanism unlocking, and pull out insertion type circuit breaker, simple structure is convenient, easy to install and replace, especially, also can replace corresponding pulling mechanism on the outside for multiple circuit breaker poles.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and in particular to a plug-in circuit breaker. Background Technology

[0002] With the development of communication technology, communication cabinets have placed further demands on height and circuit breaker installation methods, further compressing the space for equipment power distribution. 1U-sized circuit breakers and plug-in installation methods are in line with this trend. However, most existing 1U-sized plug-in circuit breakers present difficulties in removal and operation after installation in the cabinet. These plug-in circuit breakers are installed side-by-side in the cabinet, and removal is achieved by pulling the circuit breaker's open / close button. Since the height and thickness of the circuit breaker protruding from the operating surface of the cabinet are approximately 4cm and 2cm respectively (though it can be thicker or thinner), and the button is small, it is inconvenient to pull, easily leading to accidental closing or opening operations.

[0003] In addition, existing plug-in circuit breakers are composed of multiple independent circuit breaker poles connected side by side to form a multi-pole circuit breaker. Each circuit breaker pole has an independent pull-out mechanism. An additional structure is needed to connect the pull-out mechanisms of each circuit breaker pole, which is relatively complex, occupies a large space, and is inconvenient to use. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a plug-in circuit breaker.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A plug-in circuit breaker includes a circuit breaker housing and a locking mechanism disposed within the circuit breaker housing. The locking mechanism includes a locking protrusion that can extend out of the circuit breaker housing and retract into the circuit breaker housing, and a pulling mechanism for applying a pulling force to the plug-in circuit breaker. A sliding hole is provided on at least one side wall of the circuit breaker housing. The pulling mechanism includes a drive structure that extends from outside the circuit breaker housing through the sliding hole into the circuit breaker housing. The drive structure is slidable within the sliding hole and drives the locking mechanism to retract the locking protrusion into the circuit breaker housing, thereby pulling out the plug-in circuit breaker.

[0007] Preferably, the circuit breaker housing includes an operating surface and a rear end surface arranged opposite to each other, an upper side wall and a lower side wall arranged opposite to each other, and two side walls arranged opposite to each other. An operating element for driving the circuit breaker to open and close is provided on the operating surface. A locking hole is provided on the upper side wall and / or the lower side wall, and a locking protrusion extends from the locking hole. The sliding hole is provided on both side walls.

[0008] Preferably, the sliding hole is elongated, with its length direction parallel to the direction in which the plug-in circuit breaker is inserted into the cabinet and perpendicular to the plane of the operating surface.

[0009] Preferably, the pulling mechanism includes an operating structure, a driving structure, and a connecting structure connecting the operating structure and the driving structure. The operating structure is used to apply a pulling force. At least one side wall of the circuit breaker housing is also provided with a first receiving groove for accommodating the connecting structure of the pulling mechanism, so that the connecting structure does not protrude from the side wall of the circuit breaker housing. The sliding hole is disposed in the first receiving groove.

[0010] Preferably, the operating surface of the circuit breaker housing is provided with a second receiving groove for accommodating at least part of the operating structure.

[0011] Preferably, the driving structure includes a driving protrusion that extends from the sliding hole into the circuit breaker housing and directly or indirectly drives the locking mechanism to retract the locking protrusion into the circuit breaker housing.

[0012] Preferably, the locking mechanism includes a locking member, which is rotatably or slidably installed inside the circuit breaker housing. The locking member is provided with a locking protrusion, and an elastic element drives the locking member to move so that the locking protrusion extends out of the circuit breaker housing.

[0013] Preferably, the locking member is rotatably mounted in the circuit breaker housing, with a locking protrusion protruding on the upper side of one end and a driving arm extending from the other end. The driving arm extends into the sliding path of the driving structure. The elastic element drives the locking member to rotate, causing the locking protrusion to extend out of the circuit breaker housing. The driving structure slides through the driving arm to drive the locking member to rotate, causing the locking protrusion to retract into the circuit breaker housing.

[0014] Preferably, the locking member is linearly slidably disposed inside the circuit breaker housing. The elastic member drives the locking member to slide linearly, causing the locking protrusion to extend out of the circuit breaker housing. The locking mechanism also includes an unlocking rod, one end of which is hinged to the locking member, and the other end of which is located on the sliding path of the driving structure. The driving structure slides and drives the unlocking rod to rotate, thereby driving the locking member to slide, causing the locking protrusion to retract into the circuit breaker housing.

[0015] Preferably, the pulling mechanism includes a pulling member, which includes an operating rod and two connecting rods. One end of each connecting rod is connected to the operating rod, and the ends of the two connecting rods are bent towards each other and provided with driving protrusions as a driving structure.

[0016] Preferably, the circuit breaker housing is further provided with a reset component for driving the pull-out mechanism to reset.

[0017] Preferably, the pulling mechanism includes an operating structure, a driving structure, and a connecting structure between the operating structure and the driving structure. The operating structure is provided corresponding to the operating surface of the circuit breaker housing. The operating element is a handle. When the handle is rotated to the closing position, it blocks the operating structure. When it is rotated to the opening position, it avoids the operating structure.

[0018] Preferably, the circuit breaker includes multiple circuit breaker poles, each circuit breaker pole including a circuit breaker housing, and the sliding holes are provided on both side walls of the circuit breaker housing. The circuit breaker housings of the multiple circuit breaker poles are arranged side by side and the sliding holes are correspondingly arranged. The driving structure of the pulling mechanism passes through the sliding holes of the multiple circuit breaker housings, synchronously driving the locking mechanisms in the multiple circuit breaker housings to unlock synchronously, and synchronously pulling the multiple circuit breaker poles out of the cabinet.

[0019] Preferably, the pulling mechanism includes a pulling member and a pulling linkage member as a driving structure. The pulling linkage member passes through multiple sliding holes in the circuit breaker housing and is connected to the pulling member.

[0020] The plug-in circuit breaker of this invention is equipped with an independent pull-out mechanism, which can avoid misoperation of opening and closing. Moreover, a sliding hole is provided on the side wall of the circuit breaker housing, so that the drive structure of the pull-out mechanism can be installed from the outside of the circuit breaker housing and inserted into the circuit breaker housing to drive the locking mechanism to unlock and pull out the plug-in circuit breaker. The structure is simple and convenient, and easy to install and replace.

[0021] In particular, the plug-in circuit breaker, which can be used for a single circuit breaker pole or a multi-pole plug-in circuit breaker with multiple circuit breaker poles assembled side by side, can have its corresponding pull-out mechanism replaced on the outside, so that the pull-out mechanism can form an integrated structure, which is easy to install and replace.

[0022] In addition, the pulling mechanism includes a pulling linkage that passes through a sliding hole in the adjacent side wall of the adjacent circuit breaker housing. The pulling linkage is linked to the locking mechanism of multiple circuit breaker poles to synchronously drive the locking mechanism of the multi-pole plug-in circuit breaker to unlock synchronously and pull the multi-pole plug-in circuit breaker out of the cabinet synchronously. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the circuit breaker housing and pull-out mechanism of the plug-in circuit breaker in Embodiment 1;

[0024] Figure 2 This is a structural schematic diagram of the circuit breaker housing in Embodiment 1, with the following elements removed. Figure 1 The pulling mechanism in the middle;

[0025] Figure 3 This is a schematic diagram of the locking mechanism and the pulling mechanism inside the circuit breaker housing in Embodiment 1. At this time, the locking mechanism is in a locked state.

[0026] Figure 4 This is a schematic diagram of the locking mechanism and the pulling mechanism inside the circuit breaker housing in Embodiment 1. At this time, the locking mechanism is in the unlocked state.

[0027] Figure 5 This is a schematic diagram of the structure of the drawing component in Embodiment 1;

[0028] Figure 6 This is a structural schematic diagram of the unlocking lever in Embodiment 1;

[0029] Figure 7 This is a cross-sectional view of the locking mechanism and pulling mechanism in embodiment two.

[0030] Figure 8 This is a schematic diagram of the structure of the drawing component in Embodiment 2. Detailed Implementation

[0031] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the plug-in circuit breaker of the present invention. The plug-in circuit breaker of the present invention is not limited to the embodiments described below.

[0032] like Figure 1-2 As shown, a plug-in circuit breaker includes a circuit breaker housing 4 and components such as an operating mechanism, moving contact, stationary contact, protection mechanism, and locking mechanism 2 disposed within the circuit breaker housing 4. The circuit breaker housing 4 is a cuboid hexahedral structure, including an operating face and a rear face opposite to each other, an upper side wall and a lower side wall opposite to each other, and two side walls opposite to each other, with the two side walls, upper side wall, and lower side wall connecting between the operating face and the rear face. The operating face has an operating element 3 for driving the circuit breaker to open, which is connected to the operating mechanism. The operating element 3 can be a handle or a button. The rear face has terminals for plugging into busbars in a cabinet. An indicator window can also be provided on the operating face to indicate the circuit breaker's open / closed status. The operating face may or may not have terminals. The plug-in circuit breaker is inserted into the cabinet, with only the operating face protruding from the cabinet. Locking holes are provided on the upper side wall and / or lower side wall. The locking mechanism 2 includes a locking mechanism... A locking protrusion 24 extends out of the circuit breaker housing 4 and retracts into the circuit breaker housing 4. The locking protrusion 24 extends from the locking hole to engage with the cabinet limiter to lock the plug-in circuit breaker inside the cabinet. When the locking protrusion 24 retracts from the locking hole into the circuit breaker housing 4, the plug-in circuit breaker can be pulled out of the cabinet. Typically, the direction of the operating face towards the rear end face is the length direction of the circuit breaker, the direction of the upper side wall towards the lower side wall is the height direction of the circuit breaker, and the direction between the two side walls is the width direction of the circuit breaker. This is existing technology and will not be elaborated further.

[0033] An improvement of this application is that it also includes a pull-out mechanism 1 for pulling out the plug-in circuit breaker from the cabinet. A sliding hole is provided on at least one side wall of the circuit breaker housing 4. The pull-out mechanism 1 includes a drive structure that extends from outside the circuit breaker housing 4 through the sliding hole into the circuit breaker housing 4. The drive structure is slidable within the sliding hole. The drive locking mechanism 2 retracts the locking protrusion 24 into the circuit breaker housing 4 and applies a pull-out force to the plug-in circuit breaker to pull it out.

[0034] The plug-in circuit breaker of this invention has a sliding hole on the side wall of the circuit breaker housing 4, which allows the driving structure of the pulling mechanism 1 to be installed from the outside of the circuit breaker housing 4 and inserted into the circuit breaker housing 4 to drive the locking mechanism 2 to unlock and pull out the plug-in circuit breaker. The structure is simple and convenient. In particular, it can replace the corresponding pulling mechanism 1 on the outside for plug-in circuit breakers with a single circuit breaker pole or multi-pole plug-in circuit breakers with multiple circuit breaker poles assembled side by side, so that the pulling mechanism 1 can form an integrated structure, which is easy to install and replace.

[0035] like Figure 1 , 5 As shown, the pulling mechanism 1 includes an operating structure, a driving structure, and a connecting structure between the operating structure and the driving structure. The operating structure is used to apply pulling force manually or with the aid of tools. The operating structure is arranged corresponding to the operating surface of the circuit breaker housing 4 for easy operation. Preferably, the operating element 3 is a handle. When the handle is rotated to the closed position, it blocks the operating structure; when rotated to the open position, it avoids the operating structure, ensuring that the pulling mechanism 1 can only be operated when the circuit breaker is open. Figure 1-2 As shown, this is the state when the circuit breaker is open.

[0036] like Figure 5 As shown, the pulling mechanism 1 in this embodiment includes a pulling member 10. The pulling member 10 includes an operating rod 105 as an operating structure and a connecting rod 103 as a connecting structure. One end of each connecting rod 103 is connected to the operating rod 105 to form a U-shaped structure. The ends of the two connecting rods 103 are bent towards each other and provided with a driving protrusion 101 as a driving structure. The driving protrusion 101 passes through a sliding hole and extends into the circuit breaker housing 4, cooperating with the limit position of the plug-in circuit breaker to pull out the plug-in circuit breaker. In particular, the driving protrusion 101 can also slide in the sliding hole, directly or indirectly driving the locking mechanism 2 to unlock, that is, the locking protrusion 24 retracts into the circuit breaker housing 4, releasing the limit position between the plug-in circuit breaker and the cabinet.

[0037] like Figure 1-2As shown, an operating component 3 is provided on the operating surface of the circuit breaker housing 4, and a wiring terminal is provided on the rear end face opposite to the operating surface. A locking hole is provided on the upper side wall of the circuit breaker housing 4, and a locking protrusion 24 inside the circuit breaker housing 4 extends out of the locking hole. Sliding holes are provided on both side walls of the circuit breaker housing 4, and a driving protrusion 101 extends into the interior of the circuit breaker housing 4 through the sliding hole. The sliding hole is elongated, and its length direction is parallel to the direction in which the plug-in circuit breaker is inserted into the cabinet and perpendicular to the plane of the operating surface.

[0038] The operating lever 105 and connecting rod 103 are located outside the circuit breaker housing 4. The operating lever 105 is located on the operating surface side, making it easy to pull manually or with the aid of tools. The two connecting rods 103 correspond to the two side walls of the circuit breaker housing 4, respectively. In this embodiment, the operating lever 105 is a straight rod structure, which can also be bent into a V-shape or an arc shape as needed. The pulling member 10 may also be provided with a handle, pull handle, pull ring, or pull hook, etc., connected to the operating lever 105 for easy operation as the operating structure.

[0039] Preferably, at least one of the two side walls of the circuit breaker housing 4 is further provided with a first receiving groove 133 for accommodating the connecting structure of the pulling mechanism 1. The sliding hole is disposed within the first receiving groove 133, allowing the connecting structure to slide within the first receiving groove 133, ensuring that the connecting structure does not protrude from the two side walls of the circuit breaker housing 4, thus not affecting the width of the plug-in circuit breaker, nor affecting the side-by-side assembly of multiple plug-in circuit breakers into a multi-pole circuit breaker. The length of the first receiving groove 133 can 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 accommodating at least part of the operating structure. In this embodiment, the second receiving groove 135 is used to accommodate the entire operating rod 105, which serves as the operating structure. A notch is provided in the second receiving groove 135 to facilitate the pulling of the operating rod 105.

[0040] like Figure 3-4 As shown, the locking mechanism 2 in this embodiment includes a locking member 20, which is rotatably or slidably installed inside the circuit breaker housing 4. The locking member 20 is provided with a locking protrusion 24. The elastic member 23 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 pull mechanism 1, which is the driving structure, passes through the sliding hole, and the driving protrusion 101 slides to directly or indirectly drive the locking member 20 to move.

[0041] like Figure 3-4In one embodiment, the locking member 20 is linearly slidably disposed within the circuit breaker housing 4. The elastic member 23 drives the locking member 20 to slide linearly, causing the locking protrusion 24 to extend outside the circuit breaker housing 4. The sliding direction of the locking member 20 is perpendicular to the direction in which the circuit breaker is inserted into the cabinet. The locking mechanism 2 also includes an unlocking rod 21. The first end of the unlocking rod 21 is hinged to the locking member 20, and the second end of the other end is located on the sliding path of the driving structure. The driving structure slides, driving the unlocking rod 21 to rotate, which in turn drives the locking member 20 to slide, causing the locking protrusion 24 to retract into the circuit breaker housing 4. Specifically, the sliding of the driving protrusion 101 raises the second end of the unlocking rod 21, causing the unlocking rod 21 to rotate around the unlocking protrusion 22 inside the circuit breaker housing 4. By pressing down on the locking member 20 with the first end, the locking protrusion 24 retracts into the circuit breaker housing 4. After the driving protrusion 101 is limited by one end of the sliding hole, the insert-type circuit breaker is pulled out of the cabinet by the pulling member 10. When the pull-out member 10 is reset, the elastic member 23 drives the locking member 20 to reset and the locking protrusion 24 extends out of the circuit breaker housing 4. The elastic member 23 can be a compression spring, torsion spring, leaf spring, or other elastic members.

[0042] like Figure 6 As shown, the unlocking rod 21 is integrally bent, with a connecting part 211 at one end for hinged insertion into the locking member 20, and a relatively straight unlocking part 213 at the other end for engaging with the driving protrusion 101 of the pulling member 10. A bent part 212 in the middle serves as a fulcrum for rotation of the unlocking rod 21, abutting against the inner wall of the circuit breaker housing 4. It should be noted that in this embodiment, the unlocking rod 21 has a bent part 212 in the middle for abutting against the inner wall of the circuit breaker housing 4 as a fulcrum for rotation. Obviously, the unlocking rod 21 can also be directly rotatably mounted on the circuit breaker housing 4 in the middle, or the inner wall of the circuit breaker housing 4 can also have an unlocking protrusion 22, with the unlocking rod 21 rotating around the unlocking protrusion 22 as a fulcrum, or other similar solutions are also possible.

[0043] In another embodiment, the locking member 20 is rotatably mounted in the middle of the circuit breaker housing 4. One end of the locking member 20 has a protruding locking protrusion 24 on its upper side, and the other end has a protruding driving arm. The elastic member 23 drives the locking member 20 to rotate so that the locking protrusion 24 extends out of the circuit breaker housing 4. The driving arm extends into the sliding path of the driving structure. The elastic member 23 drives the locking member 20 to rotate so that the locking protrusion 24 extends out of the circuit breaker housing 4. The driving structure slides through the driving arm to drive the locking member 20 to rotate, so that the locking protrusion 24 retracts into the circuit breaker housing 4.

[0044] like Figure 7-8The second embodiment shown differs from the first embodiment mainly in that a reset member 12 is provided inside the circuit breaker housing 4 to drive the pull-out mechanism 1 to reset. Preferably, the reset member 12 acts on the reset protrusion 102 of the pull-out member 10. When the pull-out member 10 is released, the reset member 12 can drive the pull-out member 10 to reset to its initial position. Of course, the reset member 12 can also be omitted, and the pull-out member 10 can be reset manually. Alternatively, the reset member 12 can also indirectly drive the pull-out member 10 to reset.

[0045] The pulling mechanism 1 of this embodiment includes a pulling member 10. The pulling member 10 includes an operating rod 105 as an operating structure and a connecting rod 103 as a connecting structure. One end of each of the two connecting rods 103 is connected to the operating rod 105 to form a U-shaped structure. The difference between this embodiment and the first embodiment is that the end of one of the two connecting rods 103 is bent to provide a driving protrusion 101, which is used to pass through the sliding hole and extend into the circuit breaker housing 4 to drive the locking mechanism 2 to unlock, so that the locking protrusion 24 retracts into the circuit breaker housing 4 and pulls the plug-in circuit breaker out of the cabinet; while the end of the other connecting rod 103 is bent to provide a reset protrusion 102, which is used to pass through the sliding hole and extend into the circuit breaker housing 4 to cooperate with the reset member 12 and drive the pulling member 10 to reset. In this embodiment, the two connecting rods 103 have different lengths so that the reset protrusion 102 can abut against the circuit breaker housing 4 when it is reset. One end of the reset member 12 is connected to the reset protrusion 102, and the other end is connected to the circuit breaker housing 4. Of course, the two connecting rods 103 can also have the same length. The other structures of Embodiment 2 are basically the same as those of Embodiment 1, and will not be described again.

[0046] It should be noted that the cooperative structure of the plug-in circuit breaker and the pull-out mechanism 1 in this embodiment is suitable not only for single-pole plug-in circuit breakers but also for multi-pole plug-in circuit breakers. The multi-pole plug-in circuit breaker includes multiple circuit breaker poles arranged side-by-side, and each circuit breaker pole includes a circuit breaker housing 4, i.e. Figure 1 The circuit breaker housings 4 shown are arranged side by side. Each circuit breaker housing 4 includes components such as an operating mechanism, a moving contact, a stationary contact, a protection mechanism, and a locking mechanism 2. The sliding holes are provided on both side walls of the circuit breaker housing 4. The circuit breaker housings 4 of multiple circuit breaker poles are arranged side by side, with the side walls of adjacent circuit breaker housings 4 in close contact and the sliding holes corresponding to each other. The operating components 3 of the multiple circuit breaker poles are linked together.

[0047] The driving structure of the pulling mechanism 1 penetrates the sliding holes of multiple circuit breaker housings 4, synchronously driving the locking mechanisms 2 inside the multiple circuit breaker housings 4 to unlock simultaneously, and synchronously pulling multiple circuit breaker poles out of the cabinet. In one embodiment, the pulling mechanism 1 includes a pulling member 10 and a pulling linkage member. The pulling linkage member is a relatively long linkage rod. This pulling linkage member passes through multiple circuit breaker housings 4 via sliding holes and connects to the pulling member 10. Consequently, the length of the corresponding operating rod 105 also increases, slightly exceeding the sum of the widths of the multiple circuit breaker housings 4. The pulling linkage member and the driving protrusion 101 together form the driving structure. Both ends of the pulling linkage member are connected to the driving protrusions 101 at both ends of the pulling member 10, or the pulling linkage member and the driving protrusion 101 are integrally formed. The pulling linkage member can simultaneously drive the locking mechanisms 2 of the multi-pole plug-in circuit breaker to unlock, and pull the multi-pole plug-in circuit breaker out of the cabinet. The pulling linkage member and the pulling member 10 can be integrally formed. Of course, for ease of assembly, the pull-out linkage can also be a separate component from the pull-out component 10, and then assembled and connected together. For example, the drive protrusion 101 and the pull-out linkage can be directly inserted through the shaft hole, or the pull-out linkage can be connected to the pull-out component 10 by means of a connector. Depending on the circuit breaker used for two-pole, three-pole, four-pole, or more poles, the corresponding pull-out component 10 and pull-out linkage can be replaced externally to match plug-in circuit breakers with different pole numbers. The corresponding pull-out mechanism 1 can be replaced externally, so that the pull-out mechanism 1 can form an integrated structure, which is easy to install and replace.

[0048] It should be noted that the above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments, and it should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the protection scope of the present invention.

[0049] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation. Therefore, they should not be construed as limiting this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

Claims

1. A plug-in circuit breaker, comprising a circuit breaker housing (4) and a locking mechanism (2) disposed within the circuit breaker housing (4), the locking mechanism (2) comprising a locking protrusion capable of extending out of the circuit breaker housing (4) and retracting into the circuit breaker housing (4), the circuit breaker housing (4) comprising an operating surface and a rear end surface disposed opposite to each other, an upper side wall and a lower side wall disposed opposite to each other, and two side walls disposed opposite to each other, an operating element (3) for driving the circuit breaker to open and close is provided on the operating surface, a locking hole is provided on the upper side wall and / or the lower side wall, and the locking protrusion (24) extends out from the locking hole, characterized in that: It also includes a pull-out mechanism (1) for applying a pull-out force to the plug-in circuit breaker, wherein a sliding hole is provided on at least one side wall of the circuit breaker housing (4), the pull-out mechanism (1) includes a drive structure that extends from the outside of the circuit breaker housing (4) through the sliding hole into the circuit breaker housing (4), the drive structure being able to slide within the sliding hole, and a drive locking mechanism (2) that causes the locking protrusion (24) to retract into the circuit breaker housing (4) to pull out the plug-in circuit breaker.

2. The plug-in circuit breaker according to claim 1, characterized in that: The sliding hole is elongated, with its length parallel to the direction in which the plug-in circuit breaker is inserted into the cabinet and perpendicular to the plane of the operating surface.

3. The plug-in circuit breaker according to claim 1, characterized in that: The pulling mechanism (1) includes an operating structure, a driving structure, and a connecting structure between the operating structure and the driving structure. The operating structure is used to apply a pulling force. At least one side wall of the circuit breaker housing (4) is also provided with a first receiving groove (133) for accommodating the connecting structure of the pulling mechanism (1) so that the connecting structure does not protrude from the side wall of the circuit breaker housing (4). The sliding hole is provided in the first receiving groove (133).

4. The plug-in circuit breaker according to claim 3, characterized in that: The circuit breaker housing (4) has a second receiving groove (135) on its operating surface for accommodating at least part of the operating structure.

5. The plug-in circuit breaker according to claim 1, characterized in that: The driving structure includes a driving protrusion (101), which extends from the sliding hole into the circuit breaker housing (4) and directly or indirectly drives the locking mechanism (2) to retract the locking protrusion (24) into the circuit breaker housing (4).

6. The plug-in circuit breaker according to claim 1, characterized in that: The locking mechanism (2) includes a locking member (20), which is rotatably or slidably installed inside the circuit breaker housing (4). The locking member (20) is provided with a locking protrusion (24), and the elastic member (23) drives the locking member (20) to move so that the locking protrusion (24) extends out of the circuit breaker housing (4).

7. The plug-in circuit breaker according to claim 6, characterized in that: The locking member (20) is rotatably installed in the circuit breaker housing (4) at the middle. The locking protrusion (24) is provided on the upper side of one end, and the driving arm is extended from the other end. The driving arm extends to the sliding path of the driving structure. The elastic member (23) drives the locking member (20) to rotate so that the locking protrusion (24) extends out of the circuit breaker housing (4). The driving structure slides through the driving arm to drive the locking member (20) to rotate so that the locking protrusion (24) retracts into the circuit breaker housing (4).

8. The plug-in circuit breaker according to claim 6, characterized in that: The locking member (20) is linearly slidably disposed inside the circuit breaker housing (4). The elastic member (23) drives the locking member (20) to slide linearly, causing the locking protrusion (24) to extend out of the circuit breaker housing (4). The locking mechanism (2) also includes an unlocking rod (21). One end of the unlocking rod (21) is hinged to the locking member (20), and the other end of the unlocking rod (21) is located on the sliding path of the driving structure. The driving structure slides and drives the unlocking rod (21) to rotate, thereby driving the locking member (20) to slide, causing the locking protrusion (24) to retract into the circuit breaker housing (4).

9. The plug-in circuit breaker according to claim 1, characterized in that: The pulling mechanism (1) includes a pulling member (10), which includes an operating rod (105) and two connecting rods (103). One end of each of the two connecting rods (103) is connected to the operating rod (105). The ends of the two connecting rods (103) are bent towards each other and have driving protrusions (101) as driving structures. The sliding holes are provided on both side walls of the circuit breaker housing (4). The driving protrusions (101) of the two connecting rods (103) extend into the interior of the circuit breaker housing (4) from the sliding holes of the two side walls.

10. The plug-in circuit breaker according to claim 1, characterized in that: The circuit breaker housing (4) is also provided with a reset component (12) for driving the pull-out mechanism (1) to reset.

11. The plug-in circuit breaker according to claim 1, characterized in that: The pulling mechanism (1) includes an operating structure, a driving structure and a connecting structure between the operating structure and the driving structure. The operating structure is set on the operating surface of the circuit breaker housing (4). The operating component (3) is a handle. When the handle is rotated to the closing position, it blocks the operating structure. When it is rotated to the opening position, it avoids the operating structure.

12. The plug-in circuit breaker according to any one of claims 1-11, characterized in that: It includes multiple circuit breaker poles, each circuit breaker pole includes a circuit breaker housing (4), and the sliding holes are provided on both sides of the circuit breaker housing (4). The circuit breaker housings (4) of the multiple circuit breaker poles are arranged side by side and the sliding holes are correspondingly arranged. The driving structure of the pulling mechanism (1) passes through the sliding holes of the multiple circuit breaker housings (4), and synchronously drives the locking mechanism (2) in the multiple circuit breaker housings (4) to unlock synchronously, and synchronously pulls the multiple circuit breaker poles out of the cabinet.

13. The plug-in circuit breaker according to claim 12, characterized in that: The pulling mechanism (1) includes a pulling member (10) and a pulling linkage member as a driving structure. The pulling linkage member passes through the sliding holes of multiple circuit breaker housings (4) and is connected to the pulling member (10).

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