Drawer type circuit breaker

Abstract

The drawer type circuit breaker comprises a circuit breaker body, a drawer base and a sliding plate assembly, the circuit breaker body is installed in the drawer base in a sliding mode through the sliding plate assembly, the circuit breaker body comprises two circuit breaker side plates located on the two sides, and the sliding plate assembly is arranged on the inner side of the drawer base in a sliding mode and located between the inner side of the drawer base and the circuit breaker side plates. The sliding plate assembly is provided with an installation hole, the circuit breaker side plate is bent outwards to form a supporting arm corresponding to the installation hole, and the supporting arm is inserted into the installation hole. According to the drawer type circuit breaker, the circuit breaker side plates are integrally bent to form the supporting arms used for being installed on the sliding assembly, the structure is simple, parts are reduced, the production process is simplified, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a drawer-type circuit breaker. Background Art

[0002] Due to the convenience of inspection and maintenance, drawer-type circuit breakers have been widely used. Drawer-type circuit breakers can be divided into two parts: the circuit breaker body and the drawer seat. The circuit breaker body can be shaken in and out of the drawer seat. At present, large-frame molded case circuit breakers have replaced part of the frame market, but the existing drawer-type circuit breakers have defects such as complex structure and high cost. Summary of the invention

[0003] The utility model aims to overcome at least one defect of the prior art and provide a drawer type circuit breaker.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A drawer-type circuit breaker comprises a circuit breaker body, a drawer seat and a slide plate assembly, wherein the circuit breaker body is slidably installed in the drawer seat through the slide plate assembly, the circuit breaker body comprises two circuit breaker side plates located on both sides, the slide plate assembly is slidably arranged on the inner side of the drawer seat and is located between the inner side of the drawer seat and the circuit breaker side plates, the slide plate assembly is provided with a mounting hole, the circuit breaker side plates are bent outwardly to form a support arm corresponding to the mounting hole, and the support arm is inserted into the mounting hole.

[0006] Optionally, the skateboard assembly includes a skateboard and a support plate stacked on the inner side of the skateboard, the skateboard is provided with the mounting hole, the top end of the support plate is higher than or flush with the bottom wall of the mounting hole, and the support arm is placed on the top end of the support plate.

[0007] Optionally, the top end of the support plate is higher than the bottom wall of the mounting hole to form an escape space in the mounting hole, and the support arm extends downward to form a limiting protrusion corresponding to the escape space, which is used for limiting abutment with the side of the support plate facing the skateboard.

[0008] Optionally, the front side of the circuit breaker side plate is bent inward to form a first mounting arm for fixing on the front side of the base of the circuit breaker body; and / or, the rear side of the circuit breaker side plate is bent inward to form a second mounting arm for fixing on the rear side of the base of the circuit breaker body.

[0009] Optionally, the upper side of the circuit breaker side plate is bent outward to form a first force-bearing arm, which is used as a force-bearing part when the circuit breaker body is lifted; the lower side of the circuit breaker side plate is bent inward to form a first supporting arm, and the base of the circuit breaker body is placed on the first supporting arms of the two circuit breaker side plates and between the two circuit breaker side plates.

[0010] Optionally, the drawer seat includes a drawer seat bottom plate, two drawer seat side panels vertically arranged on both sides of the drawer seat bottom plate, a drawer seat rear plate vertically arranged on the rear side of the drawer seat bottom plate and between the two drawer seat side panels, and a protective cover vertically arranged between the two drawer seat side panels and opposite to the drawer seat bottom plate, wherein the protective cover is provided with exhaust holes.

[0011] Optionally, limiting notches are provided on both sides of the protective cover, and the upper side of the drawer seat side panel extends upward to form a limiting protrusion corresponding to the limiting notch, and the limiting protrusion is fixed in the limiting notch; and / or, limiting ribs are provided on the inner side of the protective cover, and slots corresponding to the limiting ribs are provided on the circuit breaker body, and the limiting ribs are inserted into the slots.

[0012] Optionally, the upper side of the drawer seat side plate is bent outward to form a second force-bearing arm, which is used as a force-bearing part when the circuit breaker is lifted; the lower side of the drawer seat side plate is bent outward to form a second supporting arm.

[0013] Optionally, the circuit breaker body includes two male terminals respectively arranged on the outer sides of two circuit breaker side plates; and the drawer seat includes two female terminals respectively used to be connected to the two male terminals.

[0014] Optionally, the interfaces at both ends of the male terminal are arranged in a straight line along the movement direction of the circuit breaker body; the interfaces at both ends of the female terminal are arranged in an L shape, one end interface is arranged corresponding to the male terminal in the movement direction of the circuit breaker body, and the other end interface passes through the through hole of the drawer seat and extends out of the drawer seat.

[0015] Optionally, the circuit breaker body includes a connecting plate and a rear connecting plate, the rear connecting plate is an integrally formed T-shaped structure, including a vertically connected transverse portion and a longitudinal portion, the transverse portion is bolted to the connecting plate, and the longitudinal portion is used to be plugged into a bridge-type contact.

[0016] Optionally, it also includes a push rod and an adjustment frame with adjustable position in the movement direction of the circuit breaker body, the push rod is fixed on the traction rod used to drive the circuit breaker body to trip and rotates synchronously with the traction rod, the circuit breaker body enters the separation state, the test state and the connection state in sequence during the process of being rocked into the drawer seat, and the push rod has a separation position, a test position and a connection position; the adjustment frame is arranged on the slide plate assembly corresponding to the push rod; when the circuit breaker body switches from the separation state to the test state, the push rod is restricted by the adjustment frame and rotates and is locked in the test position; when the circuit breaker body is in the connection state, the push rod is in the connection position and is disengaged from the adjustment frame.

[0017] Optionally, it also includes a positioning member arranged on the inner side of the drawer seat, and the positioning member is provided with a separation positioning portion abutting against the push rod at the separation position, a test positioning portion abutting against the push rod at the test position, and a connection positioning portion abutting against the push rod at the connection position.

[0018] In the drawer-type circuit breaker of the utility model, the circuit breaker side plate is integrally bent to form a support arm for mounting on the sliding assembly, which has a simple structure, reduces parts, simplifies the production process and reduces the production cost.

[0019] In addition, the structure of the reinforced slide plate is used to avoid the insufficient strength of the slide plate due to the opening of the mounting hole, thereby improving the stability of the circuit breaker body installation. The limiting protrusion cooperates with the supporting plate to prevent the circuit breaker body from deflecting or falling, further improving the stability of the circuit breaker body installation.

[0020] In addition, the provision of a protective cover prevents the circuit breaker from arcing and can prevent the side panels of the drawer seat from being deformed by force.

[0021] In addition, the accessory terminals are installed on both sides of the circuit breaker body and the drawer seat, matching the structure of the circuit breaker accessories coming out from both sides, with a reasonable layout, reduced wiring, and convenient for accessory wiring. The male terminal is set in a straight line between the side plate of the circuit breaker and the side plate of the drawer seat, and the female terminal is designed in an L shape, with one end built in and the other end external, so that when the male terminal is inserted into the female terminal, the female terminal is not easily offset by force.

[0022] In addition, a push rod and an adjustment frame with adjustable position in the movement direction of the circuit breaker body are provided. When the circuit breaker body is switched from the separated state to the test state, the push rod is restricted by the adjustment frame and rotates and is locked in the test position, so that the traction rod rotates synchronously to drive the circuit breaker body to trip and be in a state where the circuit breaker cannot be closed, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the drawer-type circuit breaker of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the circuit breaker body of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the drawer seat of the utility model;

[0026] Figure 4 This is a structural schematic diagram of a side plate of a circuit breaker from one perspective of the utility model;

[0027] Figure 5 This is a schematic structural diagram of the side plate of the circuit breaker of the utility model from another perspective;

[0028] Figure 6 It is a structural schematic diagram of the rear connecting plate of the utility model;

[0029] Figure 7 It is a schematic diagram of the structure of the protective cover of the utility model;

[0030] Figure 8 It is a structural schematic diagram of the circuit breaker in the separated state of the utility model;

[0031] Fig. 9 It is a structural schematic diagram of the circuit breaker in the connected state of the utility model;

[0032] Fig.10 It is a schematic diagram of the structure of the push rod and the positioning member at different positions of the utility model;

[0033] Circuit breaker body 100; circuit breaker side plate 110; support arm 111; limiting protrusion 112; first mounting arm 113; second mounting arm 114; first force arm 115; first supporting arm 116; base 120; slot 121; rear connecting plate 130; transverse portion 131; longitudinal portion 132; avoidance notch 133; male terminal 140; drawer seat 200; drawer seat side plate 210; limiting protrusion 211; second force arm 212; second supporting Arm 213; drawer seat back plate 220; protective cover 230; exhaust hole 231; limiting notch 232; limiting rib 233; female terminal 240; bridge contact 250; slide plate assembly 300; slide plate 310; mounting hole 311; support plate 320; push rod 400; separation position 401; test position 402; connection position 403; adjustment frame 500; positioning piece 600; separation positioning portion 601; test positioning portion 602; connection positioning portion 603. DETAILED DESCRIPTION

[0034] The specific implementation of the drawer-type circuit breaker of the present utility model is further described below in conjunction with the embodiments given in the accompanying drawings. The drawer-type circuit breaker of the present utility model is not limited to the description of the following embodiments.

[0035] like Figure 1-Figure 3As shown, the drawer-type circuit breaker of this embodiment includes a circuit breaker body 100, a drawer seat 200 and a slide assembly 300, wherein the circuit breaker body 100 is slidably installed in the drawer seat 200 through the slide assembly 300, and the circuit breaker body 100 sequentially enters a separation state, a test state and a connection state in the process of swinging into the drawer seat 200. The drawer-type circuit breaker also includes an operating screw and a transmission mechanism, wherein the operating screw is connected to the slide assembly 300 through the transmission mechanism; when the circuit breaker body 100 is swinging in or out, the operating screw is rotated to drive the slide assembly 300 to move linearly, thereby driving the circuit breaker body 100 to move linearly. It should be noted that the transmission mechanism generally includes a rack and a gear set, wherein the rack is meshed and connected with the operating screw, and the gear set includes a plurality of gears that are sequentially connected in transmission, wherein the gear at the head end is meshed and connected with the rack, and the gear at the end is connected to the slide assembly 300 in transmission, and the structure and action principle of the transmission mechanism are current technologies, which will not be described in detail here.

[0036] The circuit breaker body 100 in this embodiment includes a base 120, an operating mechanism, a contact system and a conductive system. The contact system includes a moving contact and a stationary contact. The conductive system includes a coupling plate and a rear connecting plate 130 for connecting a power source. The moving contact and the stationary contact are respectively connected to the conductive system for disconnection control. The contact system has an off state for disconnecting the conductive system and an on state for connecting the conductive system. The operating mechanism cooperates with the contact system, and the operating mechanism is connected to the moving contact of the contact system, driving the moving contact to swing and contact and separate with the stationary contact, and performing closing and opening operations, that is, entering the on state and the off state. The operating mechanism usually includes a traction rod, a lock and a tripping connection rod structure of a snap-fit, the connection rod structure is a four-link structure or a five-link structure, the connection rod structure is connected to the moving contact, the operating mechanism has a tripping state and a re-locking state, when the operating mechanism is in the re-locking state, that is, the lock and the tripping are in a snap-fit, the connection rod structure can drive the moving contact to swing, the operating mechanism in the re-locking state, that is, the operating mechanism in which the lock and the tripping are in a snap-fit, can drive the moving contact to swing, the operating mechanism can drive the contact system to conduct the conductive system, at this time, the operating mechanism can perform closing and opening operations. When the traction rod is driven by external force, it drives the lock to move, releasing the lock and the jump catch, so that the operating structure enters the tripped state from the re-locked state. The operating mechanism in the tripped state, that is, the lock and the jump catch release the buckle cooperation, and the connecting rod structure drives the moving contact and the static contact to separate, so that the contact system disconnects the conductive system. At this time, the operating mechanism cannot drive the moving contact to perform the closing operation, and the lock and the jump catch need to be re-locked to enter the re-locked state.

[0037] An improvement of the present application is that Figure 2-Figure 4As shown, the circuit breaker body 100 includes two circuit breaker side plates 110 located on both sides, the slide assembly 300 is slidably arranged on the inner side of the drawer seat 200 and is located between the inner side of the drawer seat 200 and the circuit breaker side plate 110, and the slide assembly 300 is provided with a mounting hole 311, and the circuit breaker side plate 110 is bent outward to form a support arm 111 corresponding to the mounting hole 311, and the support arm 111 is inserted into the mounting hole 311. One or more mounting holes 311 can be provided, and one mounting hole 311 can correspond to one or more support arms 111. In the drawer-type circuit breaker of this embodiment, the circuit breaker side plate 110 is integrally bent to form a support arm 111 for mounting on the sliding assembly 300, which has a simple structure, reduces parts, simplifies the production process, and reduces production costs.

[0038] Specifically, Figure 3 As shown, the slide plate assembly 300 includes a slide plate 310 and a support plate 320 stacked on the inner side of the slide plate 310, the slide plate 310 is provided with the mounting hole 311, the top of the support plate 320 is higher than or flush with the bottom wall of the mounting hole 311, and the support arm 111 is placed on the top of the support plate 320. The structure of the slide plate 310 is strengthened to avoid the insufficient strength of the slide plate 310 due to the opening of the mounting hole 311, thereby improving the stability of the installation of the circuit breaker body 100. Further, as Figure 3 and Figure 4 As shown, the top of the support plate 320 is higher than the bottom wall of the mounting hole 311 to form an escape space in the mounting hole 311, and the support arm 111 extends downward to form a limiting protrusion 112 corresponding to the escape space, which is used to limit and abut with the side of the support plate 320 facing the slide plate 310. The limiting protrusion 112 and the support plate 320 are limited and matched, so that the circuit breaker body 100 is not easy to deviate or fall, and the installation stability of the circuit breaker body 100 is further improved.

[0039] like Figure 2 , Figure 4 and Figure 5As shown, the front side of the circuit breaker side plate 110 is bent inward to form a first mounting arm 113, which is used to be fixed on the front side of the base 120 of the circuit breaker body 100; and / or, the rear side of the circuit breaker side plate 110 is bent inward to form a second mounting arm 114, which is used to be fixed on the rear side of the base 120 of the circuit breaker body 100. In a preferred embodiment, the front side of the circuit breaker side plate 110 is provided with a first mounting arm 113, and the rear side is provided with a second mounting arm 114, the first mounting arm 113 is fixed to the front side of the base 120 by screw connection, and the second mounting arm 114 abuts against the rear side of the base 120, so as to facilitate the installation between the circuit breaker side plate 110 and the base 120 and ensure a firm connection. The upper side of the circuit breaker side plate 110 is bent outward to form a first force-bearing arm 115, which is used as a force-bearing part when the circuit breaker body 100 is lifted; the lower side of the circuit breaker side plate 110 is bent inward to form a first supporting arm 116, and the base 120 of the circuit breaker body 100 is placed on the first supporting arm 116 of the two circuit breaker side plates 110 and between the two circuit breaker side plates 110.

[0040] like Figure 2 and Figure 6 As shown, the rear connecting plate 130 is an integrally formed T-shaped structure, including a vertically connected transverse portion 131 and a longitudinal portion 132, the transverse portion 131 is bolted to the connecting plate, and the transverse portion 131 is provided with an avoidance notch 133 on the side facing the base 120, and the longitudinal portion 132 is used for plugging with the bridge contact 250. The rear connecting plate 130 is cut from a profile and directly connected to the connecting plate by bolts, which has a simple and firm structure and simplifies the production process.

[0041] like Figure 3 As shown, the drawer seat 200 includes a drawer seat bottom plate, two drawer seat side plates 210 vertically arranged on both sides of the drawer seat bottom plate, a drawer seat rear plate 220 vertically arranged at the rear side of the drawer seat bottom plate and between the two drawer seat side plates 210, and a protective cover 230 vertically arranged between the two drawer seat side plates 210 and opposite to the drawer seat bottom plate, and the protective cover 230 is provided with an exhaust hole 231. The provision of the protective cover 230 prevents arc spraying from the circuit breaker and can prevent the drawer seat side plates 210 from being deformed by force.

[0042] like Figure 3 and 7As shown, the protective cover 230 is provided with limiting notches 232 on both sides, the upper side of the drawer seat side plate 210 extends upward to form a limiting protrusion 211 corresponding to the limiting notch 232, and the limiting protrusion 211 is fixed in the limiting notch 232. Further, the limiting protrusion 211 is screwed to the side wall of the limiting notch 232; and / or, the inner side of the protective cover 230 is provided with a limiting rib 233, and the upper side of the base 120 of the circuit breaker body 100 is provided with a slot 121 corresponding to the limiting rib 233, and the limiting rib 233 is inserted into the slot 121. The installation structure of the protective cover 230 is simple and easy to install.

[0043] like Figure 3 As shown, the upper side of the drawer seat side plate 210 is bent outward to form a second force-bearing arm 212, which is used as a force-bearing part when the circuit breaker is lifted. Furthermore, the upper side of the drawer seat side plate 210 first extends upward to form the limiting protrusion 211, and then bends outward to form the second force-bearing arm 212; the lower side of the drawer seat side plate 210 is bent outward to form a second supporting arm 213. The second force-bearing arm 212 and the second supporting arm 213 formed by the drawer seat side plate 210 are flanging to simplify the production process.

[0044] like Figure 2 and Figure 3 As shown, in the accessory wiring structure of the circuit breaker in this embodiment, the circuit breaker body 100 includes two male wiring terminals 140 respectively arranged on the outer sides of the two circuit breaker side plates 110, and the male wiring terminals 140 are screwed to the circuit breaker side plates 110; the drawer seat 200 includes two female wiring terminals 240 respectively used to connect with the two male wiring terminals 140, and the female wiring terminals 240 are screwed to the drawer seat side plates 210. The accessory wiring terminals are installed on both sides of the circuit breaker body 100 and the drawer seat 200, matching the structure of the accessories of the circuit breaker coming out from both sides, with a reasonable layout, reduced wiring, and convenient for accessory wiring. Preferably, the interfaces at both ends of the male wiring terminal 140 are arranged in a straight line along the movement direction of the circuit breaker body 100; the interfaces at both ends of the female wiring terminal 240 are arranged in an L shape, one end interface is arranged corresponding to the male wiring terminal 140 in the movement direction of the circuit breaker body 100, and the other end interface passes through the perforation of the drawer seat 200 and extends out of the drawer seat 200. The male terminal 140 is arranged in a straight line between the circuit breaker side plate 110 and the drawer seat side plate 210, and the female terminal 240 is designed in an L shape, with one end internal and the other end external, so that when the male terminal 140 is inserted into the female terminal 240, the female terminal 240 is not easily displaced by force.

[0045] like Figure 3As shown, the drawer-type circuit breaker of this embodiment further includes a push rod 400 and an adjustment frame 500 whose position can be adjusted in the movement direction of the circuit breaker body 100. The push rod 400 is fixed on a traction rod for driving the circuit breaker body 100 to trip and rotates synchronously with the traction rod. The push rod 400 has a separation position 401, a test position 402 and a connection position 403; the adjustment frame 500 is arranged on the slide 310 of the slide assembly 300 and corresponds to the push rod 400. The adjustment frame 500 is provided with an adjustment hole along the movement direction of the circuit breaker body 100. The adjustment shaft on the slide 310 is inserted into the adjustment hole on the adjustment frame 500 to realize the position adjustment of the adjustment frame 500. When the circuit breaker body 100 is switched from the separated state to the test state, the push rod 400 is restricted by the adjustment frame 500 to rotate and is locked in the test position 402, so that the traction rod rotates synchronously to drive the circuit breaker body 100 to be tripped and in a state where it cannot be closed, so as to improve safety. At this time, the female terminal 240 and the male terminal 140 are connected, and the accessory signal can be transmitted normally; when the circuit breaker body 100 is in the connected state, the push rod 400 is at the connection position 403, and is separated from the adjustment frame 500, and the circuit breaker body 100 can be closed normally, that is, in the re-locking state. At this time, the rear connecting plate 130 is inserted into the bridge contact 250, and the circuit breaker body 100 is connected to the drawer seat 200.

[0046] like Figure 8-Figure 10 As shown, the drawer-type circuit breaker of this embodiment further includes a positioning member 600 disposed on the inner side of the drawer seat side plate 210 of the drawer seat 200, and the positioning member 600 is provided with a separation positioning portion 601 abutting against the push rod 400 at the separation position 401, a test positioning portion 602 abutting against the push rod 400 at the test position 402, and a connection positioning portion 603 abutting against the push rod 400 at the connection position 403. The positioning member 600 and the push rod 400 are arranged in coordination to realize the positioning of the circuit breaker in different states (separated state, test state and connected state).

[0047] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0048] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A drawer-type circuit breaker, comprising a circuit breaker body (100), a drawer seat (200) and a slide assembly (300), wherein the circuit breaker body (100) is slidably mounted in the drawer seat (200) through the slide assembly (300), the circuit breaker body (100) comprises two circuit breaker side plates (110) located on both sides, the slide assembly (300) is slidably mounted on the inner side of the drawer seat (200) and is located between the inner side of the drawer seat (200) and the circuit breaker side plates (110), and the slide assembly (300) is provided with a mounting hole (311), characterized in that: The circuit breaker side plate (110) is bent outward to form a support arm (111) corresponding to the mounting hole (311), and the support arm (111) is inserted into the mounting hole (311).

2. The drawer type circuit breaker according to claim 1, characterized in that: The skateboard assembly (300) comprises a skateboard (310) and a support plate (320) stacked on the inner side of the skateboard (310); the skateboard (310) is provided with the mounting hole (311); the top end of the support plate (320) is higher than or flush with the bottom wall of the mounting hole (311); and the support arm (111) is placed on the top end of the support plate (320).

3. The drawer type circuit breaker according to claim 2, characterized in that: The top end of the support plate (320) is higher than the bottom wall of the mounting hole (311) to form an escape space in the mounting hole (311), and the support arm (111) extends downward to form a limiting protrusion (112) corresponding to the escape space, which is used for limiting contact with a side of the support plate (320) facing the slide plate (310).

4. The drawer type circuit breaker according to claim 1, characterized in that: The front side of the circuit breaker side plate (110) is bent inward to form a first mounting arm (113) for fixing on the front side of the base (120) of the circuit breaker body (100); and / or the rear side of the circuit breaker side plate (110) is bent inward to form a second mounting arm (114) for fixing on the rear side of the base (120) of the circuit breaker body (100).

5. The drawer type circuit breaker according to claim 1, characterized in that: The upper side of the circuit breaker side plate (110) is bent outward to form a first force-bearing arm (115), which is used as a force-bearing part when the circuit breaker body (100) is lifted; the lower side of the circuit breaker side plate (110) is bent inward to form a first supporting arm (116), and the base (120) of the circuit breaker body (100) is placed on the first supporting arms (116) of the two circuit breaker side plates (110) and between the two circuit breaker side plates (110).

6. The drawer type circuit breaker according to claim 1, characterized in that: The drawer seat (200) comprises a drawer seat bottom plate, two drawer seat side plates (210) vertically arranged on both sides of the drawer seat bottom plate, a drawer seat rear plate (220) vertically arranged at the rear side of the drawer seat bottom plate and between the two drawer seat side plates (210), and a protective cover (230) vertically arranged between the two drawer seat side plates (210) and opposite to the drawer seat bottom plate, wherein the protective cover (230) is provided with an exhaust hole (231).

7. The drawer type circuit breaker according to claim 6, characterized in that: The protective cover (230) is provided with limiting notches (232) on both sides, the upper side of the drawer seat side plate (210) extends upward to form a limiting protrusion (211) corresponding to the limiting notch (232), and the limiting protrusion (211) is fixed in the limiting notch (232); and / or, the inner side of the protective cover (230) is provided with a limiting rib (233), and the circuit breaker body (100) is provided with a slot (121) corresponding to the limiting rib (233), and the limiting rib (233) is inserted into the slot (121).

8. The drawer type circuit breaker according to claim 6, characterized in that: The upper side of the drawer seat side plate (210) is bent outward to form a second force-bearing arm (212), which is used as a force-bearing part when the circuit breaker is lifted; the lower side of the drawer seat side plate (210) is bent outward to form a second supporting arm (213).

9. The drawer type circuit breaker according to claim 1, characterized in that: The circuit breaker body (100) comprises two male connection terminals (140) respectively arranged on the outer sides of two circuit breaker side plates (110); and the drawer seat (200) comprises two female connection terminals (240) respectively used for connecting to the two male connection terminals (140).

10. The drawer type circuit breaker according to claim 9, characterized in that: The interfaces at both ends of the male terminal (140) are arranged in a straight line along the movement direction of the circuit breaker body (100); the interfaces at both ends of the female terminal (240) are arranged in an L shape, one end interface is arranged corresponding to the male terminal (140) in the movement direction of the circuit breaker body (100), and the other end interface passes through a through hole of the drawer seat (200) and extends out of the drawer seat (200).

11. The drawer type circuit breaker according to claim 1, characterized in that: The circuit breaker body (100) comprises a connecting plate and a rear connecting plate (130); the rear connecting plate (130) is an integrally formed T-shaped structure, comprising a vertically connected transverse portion (131) and a longitudinal portion (132); the transverse portion (131) is bolted to the connecting plate, and the longitudinal portion (132) is used for plugging with a bridge contact (250).

12. The drawer type circuit breaker according to claim 1, characterized in that: The invention also comprises a push rod (400) and an adjustment frame (500) whose position can be adjusted in the moving direction of the circuit breaker body (100); the push rod (400) is fixed on a traction rod for driving the circuit breaker body (100) to trip and rotates synchronously with the traction rod; the circuit breaker body (100) sequentially enters a separation state, a test state and a connection state during the process of being shaken into the drawer seat (200); the push rod (400) has a separation position (401), a test position (402), and a connection state. 02) and a connection position (403); the adjustment frame (500) is arranged on the slide plate assembly (300) and corresponds to the push rod (400); when the circuit breaker body (100) is switched from a separated state to a test state, the push rod (400) is restricted by the adjustment frame (500) to rotate and is locked in the test position (402); when the circuit breaker body (100) is in a connected state, the push rod (400) is in the connection position (403) and is separated from the adjustment frame (500).

13. The drawer type circuit breaker according to claim 12, characterized in that: The drawer seat (200) further comprises a positioning member (600) arranged on the inner side of the drawer seat (200), wherein the positioning member (600) is provided with a separation positioning portion (601) abutting against the push rod (400) at the separation position (401), a test positioning portion (602) abutting against the push rod (400) at the test position (402), and a connection positioning portion (603) abutting against the push rod (400) at the connection position (403).

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