CN219106031U

CN219106031U - Circuit breaker

Info

Publication number: CN219106031U
Application number: CN202223169818.5U
Authority: CN
Inventors: 顾斌斌; 卢科军; 刘书富
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-05-30
Anticipated expiration: 2032-11-28

Abstract

The circuit breaker comprises a shell provided with an indication window, wherein an operating mechanism and an indication piece are arranged in the shell, the operating mechanism comprises a connecting rod assembly and a hasp assembly, a handle mechanism is connected with a moving contact in a linkage way through the connecting rod assembly, and the connecting rod assembly is in sliding fit with the hasp assembly to drive the moving contact to rotate; the indicating piece comprises a driven part and an indicating part which can be observed from an indicating window, the connecting rod assembly is provided with a switching-off driving part and a switching-on driving part, the driving part is used for driving the driven part to swing the indicating piece to switch an indicating state when driving the moving contact to rotate in a direction close to the fixed contact, and the switching-off driving part is used for driving the driven part to swing the indicating piece to switch the indicating state when driving the moving contact to rotate in a direction far away from the fixed contact, so that a reset piece for providing reset force for the indicating piece is omitted.

Description

Circuit breaker

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a circuit breaker.

Background

A circuit breaker is a switching device capable of closing, carrying and breaking a current under normal circuit conditions and closing, carrying and breaking a current under abnormal circuit conditions for a prescribed time. The circuit breaker generally comprises an operating mechanism, a contact mechanism and an arc extinguishing system, wherein the operating mechanism drives the contact mechanism to conduct switching-on and switching-off actions, and the arc extinguishing system is matched with the arc generated by the contact mechanism to be extinguished.

In the conventional circuit breaker, an indicator for indicating the opening and closing state is generally configured, and the indicator generally needs to be additionally configured with a driving member and a resetting member, so that more parts occupy more space, and clamping stagnation is easily caused by poor matching, particularly when the resetting member is an elastic member, under the condition of long-time use, the elastic force provided by the resetting member is insufficient to reset the indicator, which is unfavorable for the normal use of the circuit breaker. In addition, the connecting rod of the existing operating mechanism is arranged and acts basically vertical to the indication window, and is difficult to be matched with the indication piece.

Disclosure of Invention

The utility model aims to overcome at least one defect of the prior art and provides a circuit breaker with a simple structure.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the circuit breaker comprises a shell provided with an indication window, wherein an operating mechanism and an indication piece are arranged in the shell, the operating mechanism comprises a connecting rod assembly and a hasp assembly, a handle mechanism is connected with a moving contact in a linkage way through the connecting rod assembly, and the connecting rod assembly is in sliding fit with the hasp assembly to drive the moving contact to rotate;

the indicating piece comprises a driven part and an indicating part which can be observed from an indicating window, the connecting rod assembly is provided with a brake separating driving part and a brake closing driving part, and the connecting rod assembly is used for driving the driven part to swing the indicating piece to switch an indicating state through the brake closing driving part when driving the moving contact to rotate in a direction close to the fixed contact, and driving the driven part to swing the indicating piece to switch the indicating state through the brake separating driving part when driving the moving contact to rotate in a direction far away from the fixed contact.

Preferably, the connecting rod assembly comprises at least one connecting rod, and the opening driving part and the closing driving part are arranged on the same connecting rod.

Preferably, the opening driving part and the closing driving part are convex bosses, and a space for accommodating the driven part is reserved between the opening driving part and the closing driving part.

Preferably, the side wall of the shell provided with the indication window is a first side wall, the first side wall is provided with a handle hole for the handle mechanism to extend out of the shell, the first side wall positioned between the indication window and the handle hole is a first matching surface, the connecting rod assembly comprises a second connecting rod opposite to the first matching surface, one end of the second connecting rod, which is close to the handle mechanism, reciprocates in the shell,

the connecting rod assembly comprises a second connecting rod, the handle mechanism drives the second connecting rod to reciprocate along the length direction of the shell, and a brake opening driving part and a brake closing driving part are arranged on the side wall, close to one end of the indication window, of the second connecting rod.

Preferably, the hasp assembly comprises a locking piece, the locking piece is opposite to the first matching surface, the locking piece is provided with a sliding groove, and one end, close to the handle mechanism, of the second connecting rod slides along the sliding groove.

Preferably, the connecting rod assembly comprises a first connecting rod, a second connecting rod, a third connecting rod and a reset piece, one end of the first connecting rod is connected with the handle mechanism, the other end of the first connecting rod is connected with one end, close to the handle mechanism, of the second connecting rod, the connecting part of the first connecting rod and the second connecting rod is in sliding fit with the hasp assembly, one end, close to the indication window, of the second connecting rod is connected with one end of the third connecting rod, a brake opening driving part and a brake closing driving part are arranged on the side wall of the second connecting rod, the other end of the third connecting rod is in linkage with the movable contact, and reset driving force is provided for the third connecting rod by the reset piece.

Preferably, the device further comprises a closing positioning part and a separating brake positioning part which are positioned in the shell, wherein the closing positioning part and the separating brake positioning part are respectively corresponding to two sides of the indication window and are used for limiting the swing range of the indication piece.

Preferably, the shell comprises a base and a cover body covered on the base, an indication window is formed in the side wall of the base, a convex connecting shaft and a closing positioning part are arranged on the inner side wall of the base corresponding to the indication window, the indication piece is located between the operating mechanism and the base, one end of the indication piece is rotationally connected with the connecting shaft, and the indication piece is abutted to the closing positioning part when closing in place.

Preferably, the brake release mechanism further comprises a positioning plate which is laminated between the connecting rod assembly and the indicating piece, the hasp assembly is rotatably assembled on the positioning plate, the positioning plate is provided with a brake release positioning part, and the indicating piece is abutted with the brake release positioning part when the brake release is in place.

Preferably, the locating plate comprises a first locating plate and a second locating plate which are oppositely arranged, the connecting rod assembly and the hasp assembly are assembled between the first locating plate and the second locating plate, the first locating plate is located between the indicating piece and the connecting rod assembly, the edge, close to the indicating window, of the first locating plate is used as a brake separating locating part, and the brake separating locating part is an inclined surface.

Preferably, the hasp assembly comprises a locking piece, an unlocking piece and a lock catch reset piece, the unlocking piece is assembled in a rotating mode, the unlocking piece is in snap fit with one end of the locking piece, the other end of the locking piece is assembled in a rotating mode, a sliding groove is formed in the middle of the locking piece, the other end of the first connecting rod slides through the sliding groove to be connected with the second connecting rod in a linkage mode, and the lock catch reset piece provides reset driving force for the unlocking piece.

Preferably, the indicator comprises an indicator body, one end of the indicator body is provided with a rotary assembly hole, the other end of the indicator body forms a fan-shaped part taking the rotary assembly hole as a circle center, one end wall of the fan-shaped part far away from the rotary assembly hole extends to form an arc-shaped wall, one side of the arc-shaped wall, which is opposite to the rotary assembly hole, is used as an indicator part provided with a brake opening mark and a brake closing mark, and a protruding shaft serving as a driven part is arranged between the rotary assembly hole and the indicator part in a protruding mode.

According to the circuit breaker disclosed by the utility model, the indicating piece is driven to swing by the opening driving part and the closing driving part of the operating mechanism respectively, so that the indicating piece is switched to be in an opening and closing state, a resetting piece for providing resetting force for the indicating piece is omitted, and the circuit breaker has the advantages of fewer parts, less occupied space and stable matching degree.

In addition, the opening driving part and the closing driving part form a groove capable of accommodating the driven part, so that an accommodating space is provided for the driven part, the matching degree is improved, and the space occupation is reduced.

In addition, the second connecting rod of the connecting rod assembly is approximately parallel and opposite to the first side wall, one end of the second connecting rod performs reciprocating motion, so that the other end provided with the opening driving part and the closing driving part has smaller swing angle, the opening driving part and the closing driving part need smaller space when driving the driven part, the inner space of the shell is saved, the miniaturization design is facilitated, the occupied space is small, and the size is reduced.

In addition, the swing range of the indicator is limited by the switch-on positioning part and the switch-off positioning part, so that poor matching caused by overlarge swing range of the indicator is prevented, and particularly, the switch-on positioning part and the switch-off positioning part are respectively formed by the inner side wall of the shell and the inclined surface of the first positioning part, and a larger swing space is provided for the indicator in a limited space.

Drawings

FIG. 1 is a schematic diagram of an operating mechanism in the present utility model during closing;

FIG. 2 is an enlarged schematic view of the portion A in FIG. 1;

FIG. 3 is a schematic view of the structure of the operating mechanism in the present utility model when opening the brake;

FIG. 4 is an enlarged schematic view of the portion B in FIG. 3;

FIG. 5 is a schematic view of the structure of the base of the present utility model;

fig. 6 is a schematic structural view of the indicator in the present utility model.

Detailed Description

Embodiments of the circuit breaker of the present utility model are further described below with reference to the examples shown in fig. 1-6. The circuit breaker of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1-4, the circuit breaker comprises a shell, a pair of wiring terminals are arranged at two ends of the shell, a handle mechanism 2, an operating mechanism, a contact mechanism and an arc extinguishing system are arranged between the pair of wiring terminals, wherein the shell is provided with a handle hole, the handle mechanism 2 is rotatably assembled on the shell and extends out of the handle hole, the contact mechanism comprises a moving contact 61 and a fixed contact which are mutually matched, the handle mechanism 2, the operating mechanism and the moving contact 61 are in linkage connection, and the handle mechanism 2 is operated to drive the moving contact 61 to rotate towards a direction approaching to or away from the fixed contact, so that switching-on or switching-off of the contact mechanism is realized; the arc extinguishing system is cooperatively arranged on one side of the contact mechanism and is used for extinguishing an arc generated when the contact mechanism breaks. In addition, a protection mechanism can be arranged in the shell and matched with the operating mechanism, the protection mechanism comprises a short circuit protection mechanism and/or an overload protection mechanism, and when the circuit breaker has a short circuit or overload fault, the short circuit protection mechanism or the overload protection mechanism triggers the operating mechanism to trip.

The improvement point of the application is that the operating mechanism comprises a connecting rod assembly and a hasp assembly, wherein the connecting rod assembly is in sliding fit with the hasp assembly, the handle mechanism 2 is in linkage connection with the moving contact 61 through the connecting rod assembly, and the connecting rod assembly is in sliding fit with the hasp assembly through the operating handle mechanism 2 so as to drive the moving contact 61 to approach or depart from the fixed contact; the operating mechanism further comprises a rotatably mounted indicator 5, the indicator 5 comprising an indicator portion 52 and a driven portion 51, wherein the indicator portion 52 is visible from an indicator window 111,

the link assembly is provided with a switching-off driving part 342 and a switching-on driving part 341, and is used for driving the driven part 51 to swing the indicator 5 to switch the indication state through the switching-on driving part 341 when the driving contact 61 rotates in the direction approaching to the fixed contact, and is used for driving the driven part 51 to swing the indicator 5 to switch the indication state through the switching-off driving part 342 when the driving contact 61 rotates in the direction separating from the fixed contact. The driven part 51 is driven by the opening driving part 342 and the closing driving part 341, respectively, to swing the indicator 5 to switch the indication state, that is, the indication part 52 indicates the state of the circuit breaker by switching the indication mark. In this way, the switching-on and switching-off states of the indicator 5 are all directly driven by the connecting rod assembly of the operating mechanism, a reset piece for providing reset force for the indicator 5 is omitted, the driving part is not required to be additionally arranged, and the device has the advantages of less parts, less occupied space and stable matching degree.

Preferably, the link assembly includes at least one link, and the same link is provided with a brake opening driving part 342 and a brake closing driving part 341. Further, the opening driving portion 342 and the closing driving portion 341 are protruding bosses, and a space for accommodating the driven portion 51 is left between the opening driving portion 342 and the closing driving portion 341, and at this time, the opening driving portion 342 and the closing driving portion 341 may be the same recess or two side walls of the through hole, so that the driven portion 51 may be accommodated therein, and poor matching between the driven portion 51 and the driving portion is prevented.

Further, the handle hole and the indication window 111 are located on the same side wall of the housing, the handle hole and the indication window 111 are jointly arranged on the first side wall of the housing, the first side wall between the handle hole and the indication window 111 is a first matching surface 131, the connecting rod assembly comprises a second connecting rod 32, the second connecting rod 32 is opposite to the first matching surface 131, one end of the second connecting rod 32 close to the handle mechanism 2 is in sliding fit with the hasp assembly to reciprocate in the housing, the track of the reciprocation is approximately parallel to the side wall of the housing connected between the handle hole and the indication window 111, namely approximately parallel to the first side wall, in particular, in the embodiment, the hasp assembly comprises a locking piece 42 provided with a sliding groove 421, the second connecting rod 32 is close to one end of the handle mechanism 2 and is in sliding fit with the sliding groove 421 of the locking piece 42, so that the sliding track of the second connecting rod 32 is limited by the sliding groove 421, the sliding of the second connecting rod 32 can be understood to move along the length direction of the shell (see the length direction of the shell in fig. 5), and the side wall of the second connecting rod 32 close to one end of the indication window 111 is provided with the opening driving part 342 and the closing driving part 341, so that the second connecting rod 32 is approximately parallel to the first side wall, one end of the second connecting rod 32 performs approximately linear reciprocating motion, the moving track is opposite to the first side wall, the swing amplitude of the other end of the second connecting rod 32 is smaller, the space required by the opening driving part 342 and the closing driving part 341 arranged on the second connecting rod 32 when the driven part 51 is driven is smaller, the inner space of the shell is saved, and the miniaturized design is facilitated.

Preferably, a closing positioning portion 113 and a separating brake positioning portion 121 are further disposed in the housing, the closing positioning portion 113 and the separating brake positioning portion 121 respectively correspond to two sides of the indication window 111 and are used for limiting the swing range of the indication member 5, the closing positioning portion 113 and/or the separating brake positioning portion 121 may be formed by components in the housing, for example, a positioning plate is disposed in the housing, and may also be directly formed by an inner side wall of the housing, and a shape of the positioning plate may be a protruding shaft or a protruding structure with other shapes.

A specific structure of the present embodiment is provided in connection with fig. 1 to 6.

As shown in fig. 1-5, the circuit breaker includes a housing, the housing is in a "convex" shape, the housing includes a base 11 and a cover body that are mutually covered, a handle hole is formed in a first sidewall 13 of the housing, in this embodiment, the upper sidewall of the base 11 is a first sidewall, a handle hole is formed in the upper sidewall of the base 11, the handle mechanism 2 is rotatably assembled on the upper portion of the housing (rotatably connected to an inner sidewall of the base 11) and extends from the handle hole to the outside of the housing, an indication window 111 is formed in the upper sidewall of the base 11 on one side of the handle hole, that is, an indication window 111 is formed in the first sidewall 13, a connecting direction between the indication window 111 and the handle hole is a first mating surface 131, a direction of a straight line from the handle hole to the indication window 111 is a length direction of the housing, as shown in fig. 5, a convex shaft is convexly arranged on an inner wall of the base 11 corresponding to a lower portion of the indication window 111, the convex shaft 112 is used for connecting with the indication piece 5, a closing positioning portion 113 is formed on one side of the base 11, and the connecting shaft 113 is located on the right side of the base 11, that is located on the side wall of the base 11, that is located on the right side of the indication window 111 in fig. 5; the positioning plate is further arranged in the shell in a laminated manner, the positioning plate is used for providing an assembling position for the operating mechanism and comprises a first positioning plate 12 and a second positioning plate, the first positioning plate 12 and the second positioning plate are oppositely arranged in the shell in parallel, in the embodiment, the base 11, the first positioning plate 12, the second positioning plate and the cover body are sequentially arranged at intervals in a laminated manner, the upper edge of the first positioning plate 12 is approximately attached to the upper side wall of the base 11, the edge, close to the indication window 111, of the first positioning plate 12 is provided with an inclined surface, the inclined surface serves as a brake separating positioning part 121 and a brake closing positioning part 113 which respectively correspond to two sides of the indication window 111, preferably, the handle mechanism 2 is rotatably supported between the first positioning plate 12 and the second positioning plate, namely one rotating end of the handle mechanism 2 penetrates through the first positioning plate 12, the second positioning plate is rotatably connected with the shell, and the other end of the handle mechanism 2 extends out of the shell from the handle hole for external use and is used for operating brake separating and closing swing.

The two ends of the base 11 are respectively provided with a wiring terminal, an operating mechanism, a contact mechanism and an arc extinguishing system are arranged between a pair of wiring terminals, the arc extinguishing system is assembled at the lower part of the base 11, a static contact is fixedly assembled at one side of an arc extinguishing chamber of the arc extinguishing system, a moving contact 61 is positioned between the static contact and one wiring terminal, the moving contact 61 is rotatably supported between a first positioning plate 12 and a second positioning plate, the operating mechanism is positioned between the arc extinguishing system and a handle mechanism 2, the operating mechanism is correspondingly positioned between the first positioning plate 12 and the second positioning plate, the operating mechanism comprises a connecting rod assembly, a hasp assembly and an indicator 5, the handle mechanism 2 is in linkage connection with the moving contact 61 through the connecting rod assembly, the hasp assembly is kept in a locking state, the connecting rod assembly and the hasp assembly are in sliding fit, the moving contact 61 is driven by the connecting rod assembly to perform opening and closing rotation, when the circuit breaker is assembled with a protection mechanism, such as a short circuit protection mechanism and/or an overload protection mechanism, when a short circuit or a fault occurs, the short circuit protection mechanism or the overload protection mechanism triggers the hasp assembly, the connecting rod assembly and the hasp assembly to be in sliding fit with the contact 61 to the contact to the linkage of the moving contact 61 to be separated from the connecting rod assembly to the position of the moving mechanism 2.

As shown in fig. 1-4, the link assembly includes a first link (not shown), a second link 32, a third link 33 and a reset element, one end of the first link is connected with the handle mechanism 2 in a linkage manner, the second link 32 is connected between the first link and the third link 33 in a linkage manner, as shown in fig. 1-4, the second link 32 is located in a shell between the handle mechanism 2 and the indication window 111, and the second link 32 is approximately parallel to the first side wall, preferably, the second link 32 is opposite to the first matching surface 131, one end of the second link 32 close to the handle mechanism 2 reciprocates in the shell, wherein the moving track of one end of the second link 32 close to the handle mechanism 2 can be a straight line or an arc of an approximate straight line, the other end of the second link 32 is close to the indication window 111, and a separation-opposite opening driving part 342 and closing driving part 341 are formed by matching the side walls of the opening driving part 342, the closing driving part 341 and the second link 32, the U-shaped groove can be accommodated in the driven part 51, the U-shaped groove is located on one side facing the indication window 111 and the opening of the U-shaped groove can be located on one side of course opposite to the indication window 111; one end of the third link 33 is connected to the moving contact 61 to drive the moving contact 61 to swing, and a reset member is connected between the third link 33 and the housing to provide a reset force for the link assembly, so that the link assembly moves from the closing position to the opening position, in this embodiment, the reset member is connected between the third link 33 and the positioning plate, in this embodiment, the third link 33 is closer to the first positioning plate 12, the reset member is connected between the third link 33 and the first positioning plate 12, or the reset member is connected between the third link 33 and the positioning plate (the first positioning plate 12 or the second positioning plate).

The hasp assembly is positioned at one side of the handle mechanism 2 and the connecting rod assembly, the hasp assembly comprises an unlocking piece 41, a locking piece 42 and a lock catch reset piece, wherein the unlocking piece 41 rotates between the first positioning plate 12 and the second positioning plate, the unlocking piece 41 is positioned between the handle mechanism 2 and the locking piece 42, when the circuit breaker is normally opened and closed, the other end of the unlocking piece 41 is in snap fit with one end of the locking piece 42, the other end of the locking piece 42 is rotationally connected with the positioning plate, the locking piece 42 can slightly rotate when the snap fit between the locking piece 42 and the unlocking piece 41 is released, the locking piece 42 is arranged along the upper side wall (first side wall) parallel to the base 11 in fig. 1-4, a sliding groove 421 is arranged in the middle of the locking piece 42, one end of the second connecting rod 32 close to the handle mechanism 2 slides along the sliding groove 421, the sliding track of the second connecting rod 32 close to one end of the handle mechanism 2 is limited by the sliding groove 421, the locking member 42 is in a plate structure parallel to the surface of the positioning plate in the drawing, a sliding groove 421 is arranged in the middle of the locking member 42, the sliding groove 421 corresponds to the first side wall, the central axis of the sliding groove 421 is approximately parallel to the first side wall, one end of the first connecting rod slides through the sliding groove 421 to be linked with the second connecting rod 32, or the connection part of the first connecting rod and the second connecting rod 32 is in sliding fit with the sliding groove 421, normally, the first connecting rod and the second connecting rod 32 are hinged through a short shaft, the short shaft passes through the sliding groove 421 as the connection part and is in sliding fit with the sliding groove 421, so that one end of the second connecting rod 32 close to the handle mechanism 2 reciprocates, the movement track thereof is approximately straight, the end of the sliding groove 421 far away from the unlocking member 41 is slightly bent to form an arc avoidance groove, in the embodiment, the end of the sliding groove 421 close to the moving contact 61 is slightly bent downwards, after closing in place, the connection part of the first connecting rod and the second connecting rod 32 is positioned in the arc avoiding groove, after the locking piece 42 and the unlocking piece 41 are unlocked, the connection part of the first connecting rod and the second connecting rod 32 is moved out of the arc avoiding groove after the locking piece 42 rotates for a certain angle, and the connecting rod assembly is driven by the resetting piece to move towards the brake separating position, namely the connection part of the first connecting rod and the second connecting rod 32 moves along the sliding groove 421 in a direction away from the arc avoiding groove until brake separating is in place; the latch reset piece is used for providing reset force for the unlocking piece 41, preferably the latch reset piece is an elastic piece, one end of the latch reset piece is connected with one end of the unlocking piece 41 far away from the handle mechanism 2, the other end of the latch reset piece is connected with the positioning plate, and after the unlocking piece 41 is separated from the locking piece 42 through unbuckling rotation, the latch reset piece provides reset force for the unlocking piece 41, so that the unlocking piece 41 is restored to the original position.

The indicator 5 is located between the operating mechanism and the base 11, in this embodiment, the first positioning plate 12 is located between the link assembly and the indicator 5, and a driven portion 51 protrudes from a side of the indicator 5 facing the link assembly, and the driven portion 51 is accommodated in the U-shaped groove through the first positioning plate 12. Of course, only one positioning plate may be disposed in the housing, and at this time, the positioning plate is preferably disposed between the link assembly and the indicator 5, and it should be noted that the first positioning plate 12 or the positioning plate is provided with a through hole or a through slot for the driven portion 51 to pass through the hollow area, so that the driven portion 51 is conveniently matched with the link assembly.

Referring to fig. 2, 4 and 6, to provide a specific structure of the indicator 5 in this embodiment, the indicator 5 includes an indicator body, one end of the indicator body is provided with a rotation assembly hole 53, the other end of the indicator body forms a sector 54 with the rotation assembly hole 53 as a center, the sector 54 extends away from an end wall of the rotation assembly hole 53 to form an arc wall, a side of the arc wall opposite to the rotation assembly hole 53 is provided with a brake-off identifier and a brake-on identifier as an indication part 52, in this embodiment, the arc wall extends along a plane perpendicular to the positioning plate, an area of the first positioning plate 12 corresponding to the indication window 111 is a hollowed-out portion, so that the arc wall can pass through the first positioning plate 12, the arc wall can seal the indication window from the inside of the housing to ensure tightness of the housing, the outer surface of the arc wall represents the brake-off identifier with different colors, for example, red or green, and other identifiers such as characters, graphics or other distinguishable identifiers can be correspondingly displayed in the indication window 111; the indicator body between the rotation assembly hole 53 and the indicator portion 52 is provided with a protruding shaft as a driven portion 51, the central axis of the protruding shaft is perpendicular to the plate surface of the positioning plate, the driven portion 51 is located on one side of the fan-shaped portion 54 near the opening engagement portion 541 in fig. 6, and the driven portion 51 is located on the side facing the link assembly and can pass through the first positioning plate 12 when assembled in the housing.

When the operation handle drives the moving contact 61 to swing to the closing position, the connection part of the first connecting rod and the second connecting rod 32 slides to the rightmost side of the sliding groove 421 from the left side of the sliding groove 421, the closing driving part 341 pushes the driven part 51, so that the indicator 5 swings clockwise until the opening driving part 342 abuts against the driven part 51, the closing matching part 542 abuts against the closing positioning part 113, the opening matching part 541 is separated from the opening positioning part 121, and the closing mark of the indicator 52 is correspondingly displayed in the indication window 111.

When the operating handle drives the moving contact 61 to swing to the opening position, the connection part of the first connecting rod and the second connecting rod 32 slides to the leftmost side of the sliding groove 421 from the right side of the sliding groove 421, and the opening driving part 342 pushes the driven part 51 to enable the indicator 5 to swing anticlockwise until the closing driving part 341 abuts against the driven part 51, the closing matching part 542 is separated from the closing positioning part 113, the opening matching part 541 abuts against the opening positioning part 121, and the opening mark of the indicator 52 is correspondingly displayed in the indication window 111.

During normal opening and closing, the unlocking piece 41 and the locking piece 42 are in a hasp limiting state, when overload or short circuit fault occurs, the overload protection mechanism or the short circuit protection mechanism pushes the unlocking piece 41 to rotate, one end of the unlocking piece 41 and the hasp of the locking piece 42 are broken down, the locking piece 42 rotates by a certain angle, the connection part of the first connecting rod and the second connecting rod 32 moves out of the arc avoidance groove of the sliding groove 421, the connecting rod assembly moves in the sliding groove 42, the connecting rod assembly is reset under the driving of the reset force of the reset piece, namely, the connecting rod assembly moves to the opening position from the closing position under the driving of the reset piece, at the moment, the connection part of the first connecting rod and the second connecting rod 32 moves leftwards to the opening position along the sliding groove 42, the locking piece 42 returns to the original position in the moving process of the connecting rod assembly, the connecting rod assembly drives the handle mechanism 2 and the moving contact 61 to rotate in the opening direction, and the opening process is indicated by the second connecting rod 32, and the indicating piece 5 is driven by the second connecting rod 32, and the opening process is indicated by the opening process.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims

1. The utility model provides a circuit breaker, includes the casing that is equipped with instruction window (111), is equipped with operating device and indicator (5) in the casing, its characterized in that: the operating mechanism comprises a connecting rod assembly and a hasp assembly, the handle mechanism (2) is connected with the moving contact (61) in a linkage way through the connecting rod assembly, and the connecting rod assembly is in sliding fit with the hasp assembly to drive the moving contact (61) to rotate;

the indicator (5) comprises a driven part (51) and an indicator part (52) which can be observed from an indicator window (111), the connecting rod assembly is provided with a brake separating driving part (342) and a brake closing driving part (341) and is used for driving the driven part (51) to swing the indicator (5) to switch an indication state through the brake closing driving part (341) when driving the moving contact (61) to rotate towards a direction close to the fixed contact, and driving the driven part (51) to swing the indicator (5) to switch the indication state through the brake separating driving part (342) when driving the moving contact (61) to rotate towards a direction far away from the fixed contact.

2. The circuit breaker according to claim 1, characterized in that: the connecting rod assembly comprises at least one connecting rod, and the opening driving part (342) and the closing driving part (341) are arranged on the same connecting rod.

3. The circuit breaker according to claim 1, characterized in that: the opening driving part (342) and the closing driving part (341) are convex bosses, and a space for accommodating the driven part (51) is reserved between the opening driving part (342) and the closing driving part (341).

4. The circuit breaker according to claim 2, characterized in that: the side wall of the shell provided with the indication window (111) is a first side wall, the first side wall is provided with a handle hole for the handle mechanism (2) to extend out of the shell, the first side wall between the indication window (111) and the handle hole is a first matching surface (131), the connecting rod assembly comprises a second connecting rod (32) opposite to the first matching surface (131), one end of the second connecting rod (32) close to the handle mechanism (2) reciprocates in the shell,

the connecting rod assembly comprises a second connecting rod (32), the handle mechanism (2) drives the second connecting rod (32) to reciprocate along the length direction of the shell, and a brake opening driving part (342) and a brake closing driving part (341) are arranged on the side wall, close to one end of the indication window (111), of the second connecting rod (32).

5. The circuit breaker of claim 4, wherein: the hasp assembly comprises a locking piece (42), the locking piece (42) is opposite to the first matching surface (131), the locking piece (42) is provided with a sliding groove (421), and one end, close to the handle mechanism (2), of the second connecting rod (32) slides along the sliding groove (421).

6. The circuit breaker according to any one of claims 1-5, characterized in that: the connecting rod assembly comprises a first connecting rod, a second connecting rod (32), a third connecting rod (33) and a reset piece, one end of the first connecting rod is connected with the handle mechanism (2), the other end of the first connecting rod is connected with one end, close to the handle mechanism (2), of the second connecting rod (32), the connecting part of the first connecting rod and the second connecting rod (32) is in sliding fit with the hasp assembly, one end, close to the indication window (111), of the second connecting rod (32) is connected with one end of the third connecting rod (33), a brake opening driving part (342) and a brake closing driving part (341) are arranged on the side wall of the second connecting rod (32), the other end of the third connecting rod (33) is linked with the moving contact (61), and reset driving force is provided for the third connecting rod (33) by the reset piece.

7. The circuit breaker according to claim 1, characterized in that: the automatic switching device is characterized by further comprising a switching-on positioning part (113) and a switching-off positioning part (121) which are positioned in the shell, wherein the switching-on positioning part (113) and the switching-off positioning part (121) respectively correspond to two sides of the indication window (111) and are used for limiting the swinging range of the indication piece (5).

8. The circuit breaker according to claim 1, characterized in that: the shell comprises a base (11) and a cover body covered on the base (11), an indication window (111) is formed in the side wall of the base (11), a protruding connecting shaft (112) and a closing positioning portion (113) are arranged on the inner side wall of the base (11) corresponding to the indication window (111), an indication piece (5) is located between an operating mechanism and the base (11), one end of the indication piece (5) is rotationally connected with the connecting shaft (112), and the indication piece (5) is abutted to the closing positioning portion (113) when being closed in place.

9. The circuit breaker according to claim 1, characterized in that: the brake release mechanism is characterized by further comprising a positioning plate which is laminated between the connecting rod assembly and the indicating piece (5), the hasp assembly is rotatably assembled on the positioning plate, the positioning plate is provided with a brake release positioning part (121), and the indicating piece (5) is abutted with the brake release positioning part (121) when the brake release is in place.

10. The circuit breaker according to claim 9, characterized in that: the locating plate comprises a first locating plate (12) and a second locating plate which are oppositely arranged, the connecting rod assembly and the hasp assembly are assembled between the first locating plate (12) and the second locating plate, the first locating plate (12) is located between the indicating piece (5) and the connecting rod assembly, the edge, close to the indicating window (111), of the first locating plate (12) serves as a brake separating locating portion (121), and the brake separating locating portion (121) is an inclined surface.

11. The circuit breaker of claim 6, wherein: the hasp assembly comprises a locking piece (42), an unlocking piece (41) and a lock catch reset piece, wherein the unlocking piece (41) is assembled in a rotating mode, the unlocking piece (41) is in snap fit with one end of the locking piece (42), the other end of the locking piece (42) is assembled in a rotating mode, a sliding groove (421) is formed in the middle of the locking piece (42), the other end of the first connecting rod slides through the sliding groove (421) to be connected with the second connecting rod (32) in a linkage mode, and the lock catch reset piece provides reset driving force for the unlocking piece (41).

12. The circuit breaker according to claim 1, characterized in that: the indicator (5) comprises an indicator body, wherein one end of the indicator body is provided with a rotating assembly hole (53), the other end of the indicator body is provided with a fan-shaped part (54) taking the rotating assembly hole (53) as a circle center, the fan-shaped part (54) is far away from the end wall of one end of the rotating assembly hole (53) to form an arc wall, one side of the arc wall, which is opposite to the rotating assembly hole (53), is provided with an indicating part (52) with a brake opening mark and a brake closing mark, and a protruding shaft serving as a driven part (51) is arranged between the rotating assembly hole (53) and the indicating part (52) in a protruding mode.