Drawer base door opening and closing structure and circuit breaker

Abstract

A drawer base door opening and closing structure, comprising a first gear and a safety door. The first gear is rotationally arranged and can drive a circuit breaker body to move back and forth in a drawer base, the first gear being an incomplete gear that is provided with transmission teeth. The safety door comprises a movable partition plate and a static partition plate, the movable partition plate being vertically movably arranged on the static partition plate, and further comprises a sliding plate and an elastic member for resetting the sliding plate, wherein the sliding plate is provided with a sliding-plate guide rail, and the drawer base is provided with a rotation support; the cooperation between the sliding-plate guide rail and the rotation support enables the sliding plate to be movably arranged on the drawer base; and the sliding plate can move along the sliding-plate guide rail and can rotate around the rotation support. A circuit breaker, comprising the drawer base door opening and closing structure. In the drawer base door opening and closing structure and the circuit breaker of the present invention, the first gear, which is rotationally arranged and drives the circuit breaker body to move in the drawer base, directly drives the sliding plate to achieve drawer base door opening and closing, so that there are a small number of transmission stages, enabling operations to be stable and reliable, improving the reliability of drawer base door opening and closing, while also greatly reducing the number of parts, enabling assembly to be convenient and quick.

Description

Drawer seat switch door structure and circuit breaker

[0001] The present application claims priority to Chinese Patent Application No. 202410759793.9, filed on June 13, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of low-voltage electrical apparatus, in particular to a drawer seat switch door structure and a circuit breaker. BACKGROUND

[0003] The existing universal circuit breaker (hereinafter referred to as circuit breaker) is divided into drawer type and fixed type products. Among them, the drawer type universal circuit breaker can be divided into two parts of the circuit breaker body and the drawer seat. The circuit breaker body can be shaken in and out of the drawer seat, which is convenient for debugging and maintenance of the circuit breaker. In the drawer seat switch door structure, the moving direction of the circuit breaker body is usually the front-back direction, and the direction of the drawer seat switch door is the up-down direction. This requires the action mechanism for driving the circuit breaker body to realize transmission turning through multiple levers to drive the drawer seat switch door. The existing drawer seat switch door structure mostly adopts a multi-stage transmission structure, which has a large number of parts and a complex structure, and is relatively troublesome to process and manufacture, and has relatively low production efficiency. SUMMARY

[0004] The present application aims to overcome at least one of the defects of the prior art and provide a drawer seat switch door structure and a circuit breaker.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The drawer seat switch door structure comprises a first gear and a safety door. The first gear is rotationally arranged and can drive the circuit breaker body to move forward and backward in the drawer seat. The first gear is an incomplete gear and is provided with transmission teeth. The safety door comprises a moving partition plate and a static partition plate. The moving partition plate is movably arranged on the static partition plate. The safety door further comprises a sliding plate and an elastic member for resetting the sliding plate. The sliding plate is provided with a sliding plate guide rail. The drawer seat is provided with a rotation fulcrum. The sliding plate guide rail and the rotation fulcrum cooperate to movably arrange the sliding plate on the drawer seat. The sliding plate can move along the sliding plate guide rail and rotate around the rotation fulcrum.

[0007] In the process that the circuit breaker switches from the connection state to the separation state, the first gear drives the circuit breaker body to move and drives the slide plate to store energy of the elastic member; in the process that the circuit breaker switches from the separation state to the test state, the first gear drives the circuit breaker body to move and rotates to drive the slide plate guide rail to slide under the action of the elastic member to rotate cooperation with the rotating fulcrum, and the safety door is kept in the closed state; in the process that the circuit breaker switches from the test state to the connection state, the first gear continues to rotate to drive the circuit breaker body to continue to move, and the slide plate rotates around the rotating fulcrum under the action of the elastic member, so that the slide plate drives the movable baffle to move to switch the safety door to the open state.

[0008] Optionally, the slide plate is provided with a slide plate driven part for driving cooperation with the driving part of the first gear, a mounting part for connection with the elastic member, and a slide plate driving part for driving cooperation with the support part of the movable baffle.

[0009] Optionally, the slide plate driven part has a connected abutting surface and a first arc surface, and the driving part of the first gear is arranged on the profile of the first gear and has a connected lifting surface and a second arc surface; when the circuit breaker is in the separation state, the abutting surface abuts on the lifting surface; when the circuit breaker is in the test state, the first arc surface abuts with the second arc surface.

[0010] Optionally, the slide plate driving part, the rotating fulcrum, the mounting part and the slide plate driven part are sequentially arranged in the up-down direction.

[0011] Optionally, the slide plate extends outward to form a bent arm with a notch, the notch of the bent arm faces the first gear and is away from the movable baffle, the end of the bent arm is an arc-shaped slide plate driving part, and the root of the bent arm away from the side of the notch is provided with an avoiding groove for avoiding the support part.

[0012] Optionally, the slide plate driving part is provided with a stop protrusion for resisting cooperation with the support part and for limiting the rotating stroke of the slide plate.

[0013] Optionally, the elastic member is a spring, has a fixed point for connection with the drawer seat and a movable point for connection with the slide plate, and the fixed point of the elastic member is located between the movable point of the elastic member and the rotating fulcrum in the up-down direction; when the circuit breaker is in the separation state, the rotating fulcrum is located between the fixed point and the movable point of the elastic member in the front-back direction; when the circuit breaker is in the connection state, the movable point of the elastic member is located between the fixed point and the rotating fulcrum of the elastic member in the front-back direction.

[0014] Optionally, the slide rail is a waist-shaped hole that is slidably fitted with the rotating pivot, and has an upper semicircle and a lower semicircle at the upper and lower ends; during the switching of the circuit breaker from the separated state to the test state, the slide rail slides downward along the rotating pivot to the upper semicircle that is rotationally fitted with the rotating pivot; during the switching of the circuit breaker from the test state to the connected state, the slide plate rotates around the rotating pivot through the upper semicircle to move the movable partition plate downward.

[0015] Optionally, the slide plate is provided with a limiting surface arranged in the up-down direction, and the limiting surface is slidably fitted with a limiting pivot on the drawer seat in the up-down direction and limitingly fitted in the front-back direction; when the circuit breaker is in the separated state, the limiting pivot is located between the highest point and the lowest point of the limiting surface in the up-down direction; when the circuit breaker is in the test state, the limiting pivot is higher than the highest point of the limiting surface.

[0016] Optionally, the slide plate is provided with a slope surface connected with the limiting surface; when the circuit breaker is in the connected state, the slope surface of the slide plate abuts against the limiting pivot.

[0017] Optionally, the drawer seat further comprises a base, the static partition plate is fixed to the front side of the base, the movable partition plate is arranged in layers on the front side of the static partition plate, the static partition plate is provided with a supporting portion for supporting the movable partition plate, and the supporting portion of the movable partition plate is arranged on the upper end of the supporting portion of the static partition plate.

[0018] Optionally, the static partition plate is provided with a mounting boss, the mounting boss is a T-shaped block formed by a transverse block and a longitudinal block, the movable partition plate is provided with a mounting groove, the mounting groove is a T-shaped groove formed by a transverse groove and a longitudinal groove, the transverse block of the mounting boss passes through the transverse groove of the mounting groove, and the longitudinal block of the mounting boss is vertically arranged between the longitudinal groove of the mounting groove and is slidably fitted thereon.

[0019] Optionally, the static partition plate is provided with a guide plate, the guide plate is a flat plate structure with a width arranged in the front-back direction and a length arranged in the up-down direction, and the movable partition plate is provided with a guide groove arranged in the up-down direction, and the guide plate is inserted into the guide groove.

[0020] Optionally, the guide plate is arranged in the left-right direction and spaced apart from the side wall of the guide groove, and the side surface of the guide plate is provided with a sliding block that is slidably fitted with the side wall of the guide groove in the up-down direction.

[0021] Optionally, the guide plate is provided with a limiting boss, and the limiting boss is limitingly fitted with the side surface of the movable partition plate that faces away from the static partition plate in the front-back direction.

[0022] Optionally, the side surface of the static partition plate that faces away from the movable partition plate is provided with a raised rib for increasing the creepage distance.

[0023] The circuit breaker comprises the drawer seat door opening structure of any one of the embodiments.

[0024] The drawer seat switch door structure and circuit breaker of the application directly drive the sliding plate by driving the first gear arranged in rotation in the drawer seat to move, realize the drawer seat switch door, the transmission number is less, the action is stable and reliable, improve the reliability of the drawer seat switch door, and the number of parts is greatly reduced, only one sliding plate is needed, and the assembly is convenient and fast.

[0025] In addition, the abutting surface and the lifting surface cooperate, the first arc surface and the second arc surface cooperate between the sliding plate and the first gear, so that the sliding plate can be switched from up-down sliding to rotation smoothly, and the sliding plate is stably positioned in the circuit breaker separation and test state.

[0026] In addition, the arc design of the sliding plate driving part can stably lift the movable baffle of the rotating sliding plate, improving the stability of the drawer seat opening.

[0027] In addition, the waist-shaped hole sliding plate guide rail cooperates with the rotation fulcrum of the round shaft, the structure is simple, can guide the up-down sliding of the sliding plate, and can stably position the sliding plate in the circuit breaker separation and connection state. Moreover, the sliding plate can be hung on the rotation fulcrum of the drawer seat side plate through the sliding plate guide rail, so that the sliding plate and the drawer seat side plate are assembled into one body. BRIEF DESCRIPTION OF DRAWINGS

[0028] Fig. 1 is a structural schematic view of the circuit breaker of the application;

[0029] Fig. 2 is a view of the circuit breaker of the application in a separation state;

[0030] Fig. 3 is a perspective view of the circuit breaker of the application in a separation state;

[0031] Fig. 4 is a view of the circuit breaker of the application in a test state;

[0032] Fig. 5 is a perspective view of the circuit breaker of the application in a test state;

[0033] Fig. 6 is a view of the circuit breaker of the application in a connection state;

[0034] Fig. 7 is a perspective view of the circuit breaker of the application in a connection state;

[0035] Fig. 8 is a structural schematic view of the drawer seat side plate of the application;

[0036] Fig. 9 is a structural schematic view of the first gear of the application;

[0037] Fig. 10 is a structural schematic view of the sliding plate of the application;

[0038] Fig. 11 is a structural schematic view of the movable baffle of the application;

[0039] Fig. 12 is a structural schematic diagram of the static baffle from one perspective of the application;

[0040] Fig. 13 is a structural schematic diagram of the static baffle from another perspective of the application;

[0041] Fig. 14 is a structural schematic diagram of the base of the application;

[0042] Fig. 15 is an assembly view of the base and the safety door of the application.

[0043] First gear 2; lifting surface 21; second arc surface 22; rotation center 23; sliding groove 24; transmission teeth 25; avoidance notch 26; sliding plate 3; sliding plate driving part 31; stop protrusion 311; avoidance groove 32; sliding plate guide rail 33; upper semicircle 331; lower semicircle 332; first arc surface 34; mounting part 35; inclined surface 36; limiting surface 37; abutting surface 38; safety door 4; moving baffle 41; support part 411; guide groove 412; mounting groove 413; static baffle 42; support part 421; mounting boss 422; guide plate 423; sliding block 424; limiting boss 425; protruding rib 426; first fixing hole 427; base 5; clamping groove 51; second fixing hole 52; elastic member 6; drawer base side plate 7; rotation support point 71; limiting support point 72; mounting support point 73; circuit breaker body 8; drawer base bottom plate 9; indicating member 91. DETAILED DESCRIPTION

[0044] The embodiments given below in conjunction with the accompanying drawings further illustrate the specific embodiments of the drawer base door opening structure and the circuit breaker of the application. The drawer base door opening structure and the circuit breaker of the application are not limited to the description of the following embodiments.

[0045] As shown in Fig. 1, the circuit breaker of the present embodiment includes a circuit breaker body 8 and a drawer base. The circuit breaker body 8 and the drawer base of the present embodiment are both prior art. The circuit breaker body 8 can be rocked in and out of the drawer base. The circuit breaker body 8 sequentially enters a disconnect state, a test state and a connected state in the process of rocking into the drawer base. The drawer base generally includes a drawer base bottom plate 9, two drawer base side plates 7 vertically arranged on both sides of the drawer base bottom plate 9, a drawer base back plate vertically arranged on the rear side of the drawer base bottom plate 9 and between the two drawer base side plates 7, and a drawer base top plate vertically arranged between the two drawer base side plates 7 opposite to the drawer base bottom plate 9. The drawer base bottom plate 9 is provided with an indicating member 91 for indicating the disconnect state, the test state and the connected state of the circuit breaker. It should be noted that the orientation description herein is with the height direction of the circuit breaker as the up-down direction, the moving direction of the circuit breaker body 8 as the front-rear direction, and the arrangement direction of the two drawer base side plates 7 as the left-right direction.

[0046] The circuit breaker further comprises an operating screw, a transmission mechanism, the circuit breaker body 8 is slidingly installed in the drawer seat through a sliding assembly, the operating screw is in transmission connection with the sliding assembly through the transmission mechanism; when the circuit breaker body 8 is shaken in or out, the operating screw is rotated to drive the sliding assembly to move linearly, and then drive the circuit breaker body 8 to move linearly. It should be noted that the sliding assembly generally comprises sliding rails installed on the drawer seat side plate 7 and located between the drawer seat side plate 7 and the circuit breaker body 8, and a sliding plate slidingly arranged in front and back. The sliding plate is slidingly arranged on the drawer seat side plate 7 through the sliding rails, and the circuit breaker body 8 is hung on the sliding plate. The transmission mechanism generally comprises a rack, a transmission shaft and a gear set. The rack is in meshing connection with the operating screw, the gear set comprises a plurality of gears in transmission connection in sequence, wherein the gear at the first end is in meshing connection with the rack, and the gear at the tail end is in transmission connection with the sliding plate of the sliding assembly. The structure and action principle of the transmission mechanism and the sliding assembly are the prior art, and will not be described here.

[0047] As shown in FIGS. 2-8, the drawer seat door opening and closing structure of the present embodiment comprises a first gear 2 and a safety door 4. In the present embodiment, the gear at the tail end of the gear set of the transmission mechanism is the first gear 2, the first gear 2 is rotationally arranged and can drive the circuit breaker body 8 to move forward and backward in the drawer seat through the sliding plate of the sliding assembly. As shown in FIGS. 2 and 9, the first gear 2 is an incomplete gear, part of the profile is provided with transmission teeth 25, the first gear 2 has a special-shaped profile and a rotation center 23, the special-shaped profile is similar to a faucet shape, also known as a faucet gear, the rear part of the special-shaped profile of the first gear 2 is provided with the transmission teeth 25 for meshing with the gear adjacent to the first gear 2 in the transmission mechanism, the first gear 2 is provided with a sliding groove 24 extending from the front side to the rear side and located below the rotation center 23, the sliding groove 24 is curved, and a roller on the sliding plate is slidingly arranged in the sliding groove 24 of the first gear 2; rotating the operating screw drives the first gear 2 to rotate, makes the sliding groove 24 of the first gear 2 hook up or fall down upward, and then drives the roller on the sliding plate to move backward or forward, so as to realize the backward movement (shaking into the drawer seat) or forward movement (shaking out of the drawer seat) of the circuit breaker body 8 hung on the sliding plate. This is the prior art and will not be described here. The safety door 4 is installed in the drawer seat and located between the rear plate of the drawer seat and the circuit breaker body 8. The safety door 4 comprises a dynamic baffle 41 and a static baffle 42, and the dynamic baffle 41 is movably arranged on the static baffle 42. The drawer seat door opening and closing structure further comprises a sliding plate 3 and an elastic member 6 for resetting the sliding plate 3, the sliding plate 3 is connected with the dynamic baffle 41, the sliding plate 3 is provided with a sliding plate guide rail 33, the drawer seat side plate 7 is provided with a rotation fulcrum 71 protruding in the left-right direction, and the sliding plate guide rail 33 and the rotation fulcrum 71 cooperate to make the sliding plate 3 movably arranged on the drawer seat, the sliding plate 3 can move along the sliding plate guide rail 33 and can rotate around the rotation fulcrum 71.

[0048] In the process of switching the circuit breaker from the connected state as shown in Figs. 6-7 to the separated state as shown in Figs. 2-3, i.e. the transmission mechanism drives the sliding plate to drive the circuit breaker body 8 to swing out of the drawer seat away from the bridge-shaped contact on the drawer seat, the first gear 2 directly or indirectly drives the sliding plate to drive the circuit breaker body 8 to move, at the same time, the first gear 2 drives the sliding plate 3 to store energy for the elastic member 6; in the process of switching the circuit breaker from the separated state as shown in Figs. 2-3 to the connected state as shown in Figs. 6-7, the elastic member 6 releases energy to drive the sliding plate 3 to move; in the process of switching the circuit breaker from the separated state as shown in Figs. 2-3 to the test state as shown in Figs. 4-5, the first gear 2 rotates to drive the circuit breaker body 8 to move to the rear of the bridge-shaped contact on the drawer seat, at the same time, the first gear 2 rotates to drive the sliding plate guide rail 33 to slide to the rotating cooperation with the rotating support 71 under the action of the elastic member 6, and the safety door 4 remains in the closed state; in the process of switching the circuit breaker from the test state as shown in Figs. 4-5 to the connected state as shown in Figs. 6-7, the first gear 2 drives the circuit breaker body 8 to continue to move to the drawer seat to approach the bridge-shaped contact on the drawer seat, at the same time, the first gear 2 continues to rotate to drive the sliding plate 3 to rotate around the rotating support 71 under the action of the elastic member 6, so that the sliding plate 3 drives the movable baffle 41 to move to switch the safety door 4 to the open state, so that the conductive system of the circuit breaker body 8 can pass through the perforation and be connected with the bridge-shaped contact on the drawer seat. In the embodiment, in the process of switching the circuit breaker from the test state as shown in Figs. 4-5 to the connected state as shown in Figs. 6-7, the sliding plate 3 is driven by the elastic member 6 to rotate around the rotating support 71 to the position as shown in Figs. 6-7; the bending arm of the first gear 2 forming the sliding groove 24 and the avoiding notch 26 on the profile does not push the sliding plate 3 to rotate. Obviously, as other embodiments, the bending arm of the first gear 2 can also be used to push the sliding plate 3 to rotate before reaching the connected state as shown in Figs. 6-7, or the bending arm of the first gear 2 can also be used to limit the sliding plate 3 when reaching the connected state as shown in Figs. 6-7.

[0049] The drawer seat door opening and closing structure and the circuit breaker of the embodiment directly drive the sliding plate 3 by the first gear 2 arranged to rotate and drive the circuit breaker body 8 to move in the drawer seat, so that the drawer seat door opening and closing structure is stable and reliable, the reliability of the drawer seat door opening and closing structure is improved, and the number of parts is greatly reduced, only one sliding plate 3 needs to be installed, and the assembly is convenient and fast.

[0050] It should be noted that the open and closed states of the safety door 4 are the prior art, and the movable partition plate 41 and the static partition plate 42 are provided with perforations. When the perforations of the movable partition plate 41 and the static partition plate 42 are aligned, the safety door 4 is in the open state, and the conductive system of the circuit breaker body 8 can pass through the perforations to connect with the bridge-shaped contact on the drawer seat. When the perforations of the movable partition plate 41 and the static partition plate 42 are misaligned, the safety door 4 is in the closed state, and the conductive system of the circuit breaker body 8 cannot pass through the perforations to connect with the bridge-shaped contact on the drawer seat.

[0051] As shown in FIGS. 8-11, the driving structure between the slide plate 3 and the first gear 2 and the movable partition plate 41 in the embodiment, the slide plate 3 is provided with a slide plate driven part for driving cooperation with the driving part of the first gear 2, a mounting part 35 for connecting with the elastic member 6, and a slide plate driving part 31 for driving cooperation with the support part 411 of the movable partition plate 41, the slide plate driving part 31, the rotation support point 71, the mounting part 35 and the slide plate driven part are sequentially arranged in the up-down direction. Specifically, as shown in FIGS. 9-10, the slide plate driven part has a connected abutting surface 38 and a first arc surface 34; the driving part of the first gear 2 is arranged on the profile of the first gear 2, and has a connected lifting surface 21 and a second arc surface 22, the lifting surface 21 is arranged at the upper end of the first gear 2 and is adjacent to the transmission tooth 25, and the side of the upper end of the first gear 2 away from the driving part is provided with a avoiding recess 26 for avoiding the slide plate driven part. As shown in FIGS. 2-3, when the circuit breaker is in the separated state, the abutting surface 38 abuts on the lifting surface 21; as shown in FIGS. 4-5, when the circuit breaker is in the test state, the first arc surface 34 abuts on the second arc surface 22. The cooperation between the abutting surface 38 and the lifting surface 21 and the cooperation between the first arc surface 34 and the second arc surface 22 between the slide plate 3 and the first gear 2 makes the slide plate 3 smoothly switch from up-down sliding to rotation, and the slide plate 3 is stably positioned in the separated and test states of the circuit breaker.

[0052] Preferably, as shown in FIGS. 10-11, the slide plate 3 extends outwardly to form a bent arm with a notch, the bent arm is similar to The notch is formed in the bending arm, the notch of the bending arm faces the first gear 2 and is away from the movable partition 41, the end of the bending arm is an arc-shaped slide plate driving part 31, the root of the bending arm is a straight structure arranged in the up-down direction, and the root of the bending arm away from the notch is provided with an avoiding groove 32 for avoiding the support part 411 of the movable partition 41. The arc-shaped design of the slide plate driving part 31 enables the rotating slide plate 3 to steadily lift the movable partition 41, thereby improving the stability of the opening of the drawer seat. Further, the slide plate driving part 31 is provided with a stop protrusion 311 for resisting the support part 411 and limiting the rotating stroke of the slide plate 3; in the process of switching the circuit breaker from the test state shown in Figs. 4-5 to the connected state shown in Figs. 6-7, the slide plate 3 rotates to the position where the stop protrusion 311 is resisted by the support part 411. The arrangement of the stop protrusion 311 enables the slide plate 3 to be stably positioned in the connected state of the circuit breaker, thereby improving the reliability of the opening of the drawer seat. It should be noted that, as other embodiments, the bending arm of the slide plate 3 can also be provided with multiple bends or without a notch, and the slide plate driving part 31 can be formed, which can be arc-shaped or be other structures such as a slope. As other embodiments, the avoiding groove 32 and the stop protrusion 311 for resisting the support part 411 can also not be provided, and can resist other components such as the static partition 42 or the drawer seat side plate 7.

[0053] As shown in Fig. 2, the elastic member 6 of the embodiment is a spring, which has a fixed point for connecting with the drawer seat and a movable point for connecting with the slide plate 3. The fixed point of the elastic member 6 is connected to a mounting fulcrum 73 on the drawer seat side plate 7, and the movable point of the elastic member 6 is connected to the mounting part 35 (Fig. 10). The mounting fulcrum 73 and the mounting part 35 can be holes, grooves or protrusions and the like. The elastic member 6 is arranged obliquely, and the fixed point of the elastic member 6 is located at the right and lower position of the movable point in Fig. 2, so that the elastic member 6 provides a right and downward force to the slide plate 3, enabling the slide plate 3 to slide downward and rotate clockwise around the rotating fulcrum 71. In the up-down direction, the fixed point of the elastic member 6 is located between the movable point of the elastic member 6 and the rotating fulcrum 71. As shown in Figs. 2-3, when the circuit breaker is in the separated state, the rotating fulcrum 71 is located between the fixed point and the movable point of the elastic member 6 in the front-rear direction; as shown in Figs. 6-7, when the circuit breaker is in the connected state, the movable point of the elastic member 6 is located between the fixed point and the rotating fulcrum 71 of the elastic member 6 in the front-rear direction. Of course, the elastic member 6 can also be a torsion spring, a spring sheet and the like.

[0054] As shown in Fig. 10, the moving setting structure of the slide plate 3 in the embodiment, the slide plate guide rail 33 is a waist-shaped hole which is slidably matched with the rotating pivot 71, and has an upper semicircle 331 and a lower semicircle 332 at the upper and lower ends. As shown in Figs. 2-3, when the circuit breaker is in the separated state, the rotating pivot 71 is in the lower semicircle 332; in the process of switching the circuit breaker from the separated state as shown in Figs. 2-3 to the test state as shown in Figs. 4-5, the slide plate guide rail 33 slides downward along the rotating pivot 71 to the upper semicircle 331 which is rotationally matched with the rotating pivot 71; in the process of switching the circuit breaker from the test state as shown in Figs. 4-5 to the connected state as shown in Figs. 6-7, the slide plate 3 rotates around the rotating pivot 71 through the upper semicircle 331 to move the movable partition plate 41 downward. The slide plate guide rail 33 of the waist-shaped hole is matched with the rotating pivot 71 of the round shaft, the structure is simple, the slide plate 3 can be guided to slide upward and downward, and the slide plate 3 can be stably positioned in the separated and connected states of the circuit breaker. Moreover, the slide plate 3 can be hung on the rotating pivot 71 of the drawer seat side plate 7 through the slide plate guide rail 33 to assemble the slide plate 3 and the drawer seat side plate 7 into an integral body.

[0055] Further, the slide plate 3 is provided with a limiting surface 37 which is arranged in the upward and downward direction, and the limiting surface 37 is slidably matched with a limiting pivot 72 on the drawer seat side plate 7 in the upward and downward direction, and is limitingly matched in the front and rear direction; as shown in Figs. 2-3, when the circuit breaker is in the separated state, the limiting pivot 72 is located between the highest point and the lowest point of the limiting surface 37 in the upward and downward direction; as shown in Figs. 4-5, when the circuit breaker is in the test state, the limiting pivot 72 is higher than the highest point of the limiting surface 37. The limiting surface 37 is matched with the limiting pivot 72 to limit the slide plate 3 when sliding upward and downward, so that the slide plate 3 stably and reliably slides upward and downward, and the structure is simple. The slide plate 3 is provided with a slope surface 36 which is connected with the limiting surface 37. As shown in Figs. 6-7, when the circuit breaker is in the connected state, the slope surface 36 of the slide plate 3 abuts against the limiting pivot 72.

[0056] As shown in FIG. 14 and FIG. 15, the drawer seat switch door structure of the present embodiment further comprises a base 5, which is also commonly referred to as a rear plate of the drawer seat arranged at the rear side of the drawer seat. The static partition plate 42 is fixed at the front side of the base 5, and the dynamic partition plate 41 is arranged in layers at the front side of the static partition plate 42. The side of the static partition plate 42 opposite to the dynamic partition plate 41 is provided with a protruding rib 426 for increasing the creepage distance. The static partition plate 42 is provided with a supporting portion 421 for supporting the dynamic partition plate 41. The supporting portion 411 of the dynamic partition plate 41 is arranged on the upper end of the supporting portion 421 of the static partition plate 42 to keep the safety door in the closed state. The base 5 is provided with a clamping groove 51, and the lower end of the static partition plate 42 is clamped into the clamping groove 51 of the base 5. The static partition plate 42 and the base 5 are further fastened by a fixing screw. The first fixing hole 427 at the upper end of the static partition plate 42 and the second fixing hole 52 at the upper end of the base 5 are arranged correspondingly and cooperated with the fixing screw. Obviously, as other embodiments, the static partition plate 42 and the base 5 can be integrally formed, or the base 5 can also be the static partition plate 42, which belongs to the protection scope of the present application.

[0057] As shown in FIG. 11-13, the up-and-down sliding structure of the dynamic partition plate 41 in the present embodiment. The static partition plate 42 is provided with a mounting protruding block 422, which is a T-shaped block formed by connecting a horizontal block and a vertical block. The dynamic partition plate 41 is provided with a mounting slot 413, which is a T-shaped slot formed by connecting a horizontal slot and a vertical slot. The horizontal block of the mounting protruding block 422 passes through the horizontal slot of the mounting slot 413, and the vertical block of the mounting protruding block 422 is arranged vertically between the vertical slot of the mounting slot 413 and cooperates with the vertical slot in up-and-down sliding. The mounting slot 413 and the mounting protruding block 422 are cooperated to realize the up-and-down sliding arrangement between the dynamic partition plate 41 and the static partition plate 42, which has a simple structure and reduces the types of parts.

[0058] Optionally, the static partition plate 42 is provided with a guide plate 423, which is a flat plate structure arranged in the front-and-rear direction in width and in the up-and-down direction in length. The dynamic partition plate 41 is provided with a guide slot 412 arranged in the up-and-down direction, and the guide plate 423 is inserted into the guide slot 412. The arrangement of the guide plate 423 can increase the creepage distance. The thickness of the guide plate 423 is less than the width of the guide slot 412, so that the guide plate 423 is arranged in the left-and-right direction and spaced from the side wall of the guide slot 412. The side surface of the guide plate 423 is provided with a sliding block 424 which cooperates with the side wall of the guide slot 412 in up-and-down sliding. The side surface of the sliding block 424 for cooperating with the side wall of the guide slot 412 is preferably an arc surface. The sliding block 424 on the guide plate 423 cooperates with the side wall of the guide slot 412 to avoid the dynamic partition plate 41 from being stuck when moving. The guide plate 423 is provided with a limiting protruding block 425 which cooperates with the side surface of the dynamic partition plate 41 opposite to the static partition plate 42 in the front-and-rear direction to prevent the dynamic partition plate 41 from being warped.

[0059] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when in use, and are only for the convenience of description, and do not indicate that the devices or elements referred to must have a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating relative importance.

[0060] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all should be considered as falling within the scope of protection of the present application.

Claims

1. A drawer base switch door structure, comprising a first gear (2) and a safety door (4), the first gear (2) is rotationally arranged and capable of driving a circuit breaker body (8) to move back and forth in the drawer base, the first gear (2) is an incomplete gear and is provided with a transmission tooth (25); the safety door (4) comprises a dynamic baffle (41) and a static baffle (42), the dynamic baffle (41) is arranged on the static baffle (42) to move up and down, characterized in that: The sliding plate (3) is provided with a sliding plate guide rail (33), and the drawer seat is provided with a rotating fulcrum (71), the sliding plate guide rail (33) and the rotating fulcrum (71) cooperate to make the sliding plate (3) move and be arranged on the drawer seat, the sliding plate (3) can move along the sliding plate guide rail (33) and rotate around the rotating fulcrum (71); ​ In the process that the circuit breaker switches from the connected state to the separated state, the first gear (2) drives the circuit breaker body (8) to move and drives the sliding plate (3) to store energy in the elastic element (6); in the process that the circuit breaker switches from the separated state to the test state, the first gear (2) drives the circuit breaker body (8) to move and rotate at the same time, so that the sliding plate guide rail (33) slides to the rotating cooperation with the rotating fulcrum (71) under the action of the elastic element (6), and the safety door (4) remains in the closed state; in the process that the circuit breaker switches from the test state to the connected state, the first gear (2) continues to rotate to drive the circuit breaker body (8) to continue to move, and at the same time, the sliding plate (3) rotates around the rotating fulcrum (71) under the action of the elastic element (6), so that the sliding plate (3) drives the movable baffle (41) to move to make the safety door (4) switch to the open state.

2. The drawer seat switch door structure according to claim 1, characterized in that: The sliding plate (3) is provided with a sliding plate driven part for driving cooperation with the driving part of the first gear (2), a mounting part (35) for connection with the elastic element (6), and a sliding plate driving part (31) for driving cooperation with the supporting part (411) of the movable baffle (41).

3. The drawer seat switch door structure according to claim 2, characterized in that: The sliding plate driven part has a connected abutting surface (38) and a first arc surface (34), the driving part of the first gear (2) is arranged on the profile of the first gear (2) and has a connected lifting surface (21) and a second arc surface (22); when the circuit breaker is in the separated state, the abutting surface (38) abuts on the lifting surface (21); when the circuit breaker is in the test state, the first arc surface (34) abuts with the second arc surface (22).

4. The drawer seat switch door structure according to claim 2, characterized by: The sliding plate driving part (31), the rotating fulcrum (71), the mounting part (35) and the sliding plate driven part are sequentially arranged in the up-down direction.

5. The drawer seat switch door structure according to claim 2, characterized by: The sliding plate (3) extends outward to form a bent arm with a notch, the notch of the bent arm faces the first gear (2) and faces away from the movable baffle (41), the end of the bent arm is an arc-shaped sliding plate driving part (31), and the root of the bent arm is provided with an avoidance groove (32) for avoiding the supporting part (411).

6. The drawer seat switch door structure according to claim 5, characterized in that: The sliding plate driving part (31) is provided with a stop protrusion (311) for resisting cooperation with the supporting part (411) and limiting the rotating stroke of the sliding plate (3).

7. The drawer seat switch door structure according to claim 1, characterized by: The elastic member (6) is a spring, has a fixed point for connecting with the drawer seat and a movable point for connecting with the sliding plate (3), the fixed point of the elastic member (6) is located between the movable point of the elastic member (6) and the rotating pivot (71) in the up-down direction, the rotating pivot (71) is located between the fixed point and the movable point of the elastic member (6) in the front-back direction when the circuit breaker is in the separation state, and the movable point of the elastic member (6) is located between the fixed point and the rotating pivot (71) of the elastic member (6) in the front-back direction when the circuit breaker is in the connection state.

8. The drawer base switch door structure according to any one of claims 1-7, characterized in that: The sliding plate guide rail (33) is a waist-shaped hole which is slidably matched with the rotating pivot (71) in the up-down direction, has an upper semicircle (331) and a lower semicircle (332) located at the two ends in the up-down direction, and is slid downward along the rotating pivot (71) to the upper semicircle (331) which is rotationally matched with the rotating pivot (71) in the process of switching the circuit breaker from the separation state to the test state, and the sliding plate (3) is rotated around the rotating pivot (71) through the upper semicircle (331) to move the movable baffle (41) downward in the process of switching the circuit breaker from the test state to the connection state.

9. The drawer seat switch door structure according to claim 8, characterized in that: The sliding plate (3) is provided with a limiting surface (37) arranged in the up-down direction, the limiting surface (37) is slidably matched with a limiting pivot (72) on the drawer seat in the up-down direction and limitingly matched in the front-back direction, and the sliding plate (3) is provided with an inclined surface (36) connected with the limiting surface (37); the inclined surface (36) of the sliding plate (3) is abutted with the limiting pivot (72) when the circuit breaker is in the connection state.

10. The drawer seat switch door structure according to claim 1, characterized by: The base (5) is further included, the static baffle (42) is fixed on the front side of the base (5), the movable baffle (41) is arranged on the front side of the static baffle (42) in layers, the static baffle (42) is provided with a supporting portion (421) for supporting the movable baffle (41), and the supporting portion (411) of the movable baffle (41) is arranged on the upper end of the supporting portion (421) of the static baffle (42).

11. The drawer seat switch door structure according to claim 1 or 10, characterized in that: The static baffle (42) is provided with a mounting boss (422), the mounting boss (422) is a T-shaped block formed by connecting a transverse block and a longitudinal block, the movable baffle (41) is provided with a mounting groove (413), the mounting groove (413) is a T-shaped groove formed by connecting a transverse groove and a longitudinal groove, the transverse block of the mounting boss (422) passes through the transverse groove of the mounting groove (413), and the longitudinal block of the mounting boss (422) is vertically arranged between the longitudinal groove of the mounting groove (413) and slidably matched in the up-down direction.

12. The drawer base switch door structure according to claim 1 or 10, characterized in that: The static baffle (42) is provided with a guide plate (423), the guide plate (423) is a flat plate structure arranged in the front-back direction in width and in the up-down direction in length, and the movable baffle (41) is provided with a guide groove (412) arranged in the up-down direction, and the guide plate (423) is arranged in the guide groove (412).

13. The drawer seat switch door structure according to claim 12, characterized in that: The guide plate (423) is arranged in the left-right direction and spaced from the side wall of the guide groove (412), and a sliding block (424) is arranged on the side surface of the guide plate (423) and slidably matched with the side wall of the guide groove (412) in the up-down direction; a limiting boss (425) is arranged on the guide plate (423) and limiting matched with the side surface of the dynamic partition plate (41) away from the static partition plate (42) in the front-rear direction.

14. The drawer base switch door structure according to claim 1 or 10, characterized in that: A convex rib (426) for increasing the creepage distance is arranged on the side surface of the static partition plate (42) away from the dynamic partition plate (41).

15. A circuit breaker characterized by: The drawer seat switch door structure comprises a drawer seat (1) and a door (2) arranged on the drawer seat (1) and capable of being opened and closed, wherein the door (2) is arranged on the drawer seat (1) and capable of being opened and closed through a hinge (3) arranged on the drawer seat (1), and the hinge (3) comprises a hinge shaft (31) and a hinge plate (32) arranged on the hinge shaft (31) and capable of being opened and closed, wherein the hinge plate (32) is arranged on the hinge shaft (31) and capable of being opened and closed through a hinge pin (33) arranged on the hinge plate (32) and capable of being opened and closed, and the hinge plate (32) comprises a hinge plate body (321) and a hinge plate cover (322) arranged on the hinge plate body (321) and capable of being opened and closed, wherein the hinge plate cover (322) is arranged on the hinge plate body

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