CN216928428U - Circuit breaker - Google Patents

Abstract

The utility model provides a circuit breaker, includes casing and operating device and the indicating device of setting in the casing, operating device includes hasp complex jump fastener and snap close piece, indicating device includes alarm indicator and second elastic component, and alarm indicator rotates and installs in the casing, and the second elastic component acts on alarm indicator, and alarm indicator is equipped with the alarm indication face, and when circuit breaker dropout separating brake, jump fastener and snap close piece remove hasp complex, jump fastener or snap close piece drive alarm indicator rotate, make alarm indication face and instruction window correspond, can instruct the dropout separating brake state of circuit breaker.

Description

Circuit breaker

Technical Field

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

Background

The prior plug-in circuit breaker has the following technical problems

1. The existing circuit breaker has small space, is mostly set to a single-breakpoint contact mechanism, has limited breaking capacity and cannot be used for overhigh voltage.

2. The existing circuit breaker inlet wire end and the appearance end are arranged relatively, the operating part is arranged on the outlet wire end side, and the wire and the operating part are arranged on the same side, so that the circuit breaker is inconvenient for user operation and causes certain operation potential safety hazards.

3. The wire inlet end of the circuit breaker is not plugged, the wire outlet end is connected by a wire, and the wiring is inconvenient.

4. Most of auxiliary contacts and/or alarm contacts of the existing circuit breaker are independent modules and are spliced on one side of the circuit breaker so as to monitor the state of the circuit breaker, and the spliced circuit breaker is large in thickness and occupies the space of a circuit breaker installation cabinet.

5. The existing rotary double-breakpoint movable contact side is not provided with an arc striking sheet or is provided with an independent arc striking sheet, and the arc striking function is common.

6. The indicating device of the existing circuit breaker can only indicate the switching-on and switching-off state of the circuit breaker and cannot indicate the alarm state of tripping and switching-off, or the indicating device has a complex structure and occupies a large space.

The present invention has been made to solve at least one of the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

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

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

the utility model provides a circuit breaker, includes casing and operating device and the indicating device of setting in the casing, operating device includes hasp complex jump fastener and snap close piece, indicating device includes alarm indicator and second elastic component, and alarm indicator rotates and installs in the casing, and the second elastic component acts on alarm indicator, and alarm indicator is equipped with the alarm indication face, and when circuit breaker dropout separating brake, jump fastener and snap close piece remove hasp complex, jump fastener or snap close piece drive alarm indicator rotate, make alarm indication face and instruction window correspond.

Preferably, an operating part for driving the circuit breaker to switch on and off is arranged on the end face of one end of the shell, a moving contact component is arranged in the shell, the operating mechanism comprises a lever, a tripping part and a locking part, the moving contact component comprises a moving contact and a contact rotating shaft, the contact rotating shaft is rotatably installed in the shell, the moving contact is arranged on the contact rotating shaft, the tripping part and the locking part are rotatably installed on the contact rotating shaft and in snap fit, the lever is rotatably installed in the shell, the tripping part is connected with the lever through a first connecting part, and the lever is connected with the operating part through a second connecting part.

Preferably, the indicating device further comprises a switching-on and switching-off indicating piece and a first elastic piece, the switching-on and switching-off indicating piece is rotatably installed in the shell, the first elastic piece acts on the switching-on and switching-off indicating piece, the switching-on and switching-off indicating piece is provided with a switching-on and switching-off indicating piece surface, and when the circuit breaker is switched on or switched off, the operating piece or the operating mechanism or the contact rotating shaft drives the switching-on and switching-off indicating piece to enable the switching-on and switching-off indicating piece surface to correspond to the indicating window to indicate the switching-on and switching-off state.

Preferably, when the circuit breaker is switched on or switched off, the lever rotates to drive the switching-on and switching-off indicating part, so that a switching-on indicating area or a switching-off indicating area on the surface of the switching-on and switching-off indicating part corresponds to the indicating window, when the circuit breaker is switched on or switched off, the lever rotates to be separated from the switching-on and switching-off indicating part, the first elastic part drives the switching-on and switching-off indicating part to reset, and the switching-off indicating area or the switching-on indicating area corresponding to the surface of the switching-on indicating part corresponds to the indicating window.

Preferably, the rotating axes of the opening and closing indicating member and the alarm indicating member are concentrically arranged.

Preferably, the first elastic member and the second elastic member are the same elastic member.

Preferably, a first pivot part is arranged in the middle of the opening and closing indicating piece, one end of the first pivot part is a first swing arm, the other end of the first pivot part is a first indicating arm, and the end part of the first indicating arm is provided with an arc opening and closing indicating piece surface; the middle of the alarm indicating piece is provided with a second pivot part, one end of the alarm indicating piece is a second swing arm, the other end of the alarm indicating piece is a second indicating arm, the end part of the second indicating arm is provided with an arc-shaped alarm indicating surface, and the same elastic piece serving as the first elastic piece and the second elastic piece is an indicating spring and is arranged between the first pivot part and the second pivot part.

Preferably, one of the first pivoting part and the second pivoting part is provided with a spring assembly groove, the other one of the first pivoting part and the second pivoting part is provided with a spring assembly boss, the spring assembly groove and the spring assembly boss are respectively provided with a pivoting hole for the rotating shaft to penetrate through, the indicating spring is sleeved on the spring assembly boss, the spring assembly boss is correspondingly assembled in the spring assembly groove, and an elastic arm of the indicating spring is respectively acted on the opening and closing indicating member and the alarm indicating member.

Preferably, a closing indication area and an opening indication area are arranged on the opening and closing indication piece surface, the closing indication area and the opening indication area are arranged in height to form a step structure, and the alarm indication surface can rotationally shield the closing indication area or the opening indication area at the lower part of the step structure and is limited with the side wall of the step structure.

Preferably, the indicating device further comprises a swing rod, a sliding block, a first return spring and a second return spring, the swing rod is rotatably arranged in the shell, the first return spring acts on the swing rod, the sliding block is slidably arranged in the shell, and the second return spring acts on the sliding block; when the circuit breaker is switched on, the operating part or the operating mechanism or the moving contact assembly can drive the sliding block to move, so that the sliding block drives the alarm indicating part to be far away from the indicating window, the sliding block is limited with the swing rod, when the circuit breaker is tripped and switched off, the tripping part and the locking part are in hasp fit, the tripping part or the locking part pushes the swing rod to move, the swing rod is free from limitation with the sliding block, the second reset spring drives the sliding block to move to avoid the alarm indicating part, and the second elastic part drives the alarm indicating part to correspond to the indicating window.

Preferably, the slider includes slider main part and the trigger arm that becomes the T type setting, and slider main part straight line slidable mounting is in the casing, and one end is as the first drive division with second reset spring complex, and the other end is as the first spacing portion with the spacing complex of pendulum rod, and the trigger arm is connected with slider main part middle part, and the alarm contact is installed in one side of trigger arm along the sliding direction of slider, and one side of trigger arm is as the first trigger part of drive warning indicator, and the opposite side of trigger arm is as the second drive division.

Preferably, the swing rod is provided with a second limiting portion in limiting fit with the slider, a second triggering portion in matching with the locking piece or the jump locking piece, and a first driving portion in matching with the first reset spring, the swing rod is respectively provided with a first swing arm and a second swing arm in a protruding manner, the end portion of the first swing arm serves as the second limiting portion, the second swing arm is provided with a limiting structure serving as the first driving portion in matching with the first reset spring, and one side edge of the second swing arm serves as the second triggering portion.

Preferably, the jumping buckle piece is provided with a jumping buckle hook in snap fit with the buckle piece in a protruding mode, one side, close to the jumping buckle piece, of the buckle piece is provided with a notch to form a buckle platform, the buckle elastic piece drives the buckle piece to rotate in the direction close to the jumping buckle piece to enable the buckle platform to be in snap fit with the jumping buckle, and after the jumping buckle piece is relieved from being in snap fit with the buckle piece, the jumping buckle piece pushes the buckle piece to push the swing rod to move in an accelerating mode.

The circuit breaker is provided with the indicating device, when the circuit breaker is tripped and opened, the snap-fastener and the lock fastener are disengaged from each other, the snap-fastener or the lock fastener drives the alarm indicating piece to rotate, so that the alarm indicating surface corresponds to the indicating window, the tripping and opening state of the circuit breaker can be indicated, and fault alarm can be realized.

In addition, the indicating device is also provided with a switching-on/off indicating piece, when the circuit breaker is switched on or switched off, the operating piece or the operating mechanism or the contact rotating shaft drives the switching-on/off indicating piece, so that the surface of the switching-on/off indicating piece corresponds to the indicating window to indicate the switching-on/off state. Particularly, the rotating axes of the opening and closing indicating member and the alarming indicating member are concentrically arranged and are in driving fit through the same elastic member.

In addition, jump fastener or snap close piece through spacing complex pendulum rod and slider drive alarm indicator, the cooperation is reliable and can not influence the normal divide-shut brake of circuit breaker.

Drawings

Fig. 1 is a schematic diagram of the external structure of the inventive circuit breaker;

fig. 2-3 are schematic diagrams of the internal structure of the inventive circuit breaker;

FIG. 4 is a schematic structural diagram of the inventive arc striking assembly;

fig. 5 is a schematic diagram of the internal structure of the circuit breaker of the invention with the contact rotating shaft removed;

fig. 6-9 are schematic structural diagrams of a first embodiment of the indicating device for a circuit breaker according to the present invention;

fig. 10-13 are schematic structural views of a second embodiment of the circuit breaker indicating device according to the present invention;

fig. 14-16 are schematic structural views of embodiments of the alarm contact device and auxiliary contact device of the circuit breaker of the invention.

Detailed Description

The following embodiments are given in conjunction with the accompanying drawings to further illustrate the embodiments of the circuit breaker. The circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-2, the present embodiment is a plug-in circuit breaker, which includes a housing having a flat and long hexahedral structure, an operating element 1 for driving the circuit breaker to open and close is disposed on an end face of one end of the housing, an incoming line terminal 13-1 and an outgoing line terminal 13-2 are disposed on an end face of the opposite end, and a locking mechanism 2 for locking and matching with a cabinet is disposed on a side surface between the end face on which the operating element 1 is disposed and the end face on which the incoming line terminal 13-1 and the outgoing line terminal 13-2 are disposed. The terminal surface that is equipped with operating parts 1 is the operation face, and operating parts 1 one end stretches out the casing and is used for the operation outward, and the terminal surface that is equipped with incoming line terminal 13-1 and outgoing line terminal 13-2 is business turn over line terminal surface, and business turn over line terminal surface sets up with the operation face relatively still be equipped with instruction window 19 on the operation face, incoming line terminal 13-1 and outgoing line terminal 13-2 set up in same end, and are plug-in binding post, and the plug interface of its business turn over line terminal surface is U type trough-shaped for with outside copper bar plug-in connection, be provided with locking mechanical system 2 in the side with business turn over line terminal surface and operation face mutually perpendicular, be used for with rack locking cooperation.

An operating mechanism, a moving contact component, a static contact component, an arc extinguishing mechanism and a protection mechanism are also arranged in a shell of the circuit breaker, and the protection mechanism comprises a short-circuit protection device 10 and/or an overload protection device 11 and/or an electric leakage protection mechanism; the operating mechanism is connected with the operating part 1, the moving contact assembly is connected with the operating mechanism, the operating part 1 drives the operating mechanism to drive the moving contact assembly to contact with or separate from the static contact assembly to realize switching on and switching off of the circuit breaker, when a short-circuit fault occurs in a circuit, the short-circuit protection device 10 triggers the operating mechanism to release to enable the circuit breaker to release and switch off to realize circuit protection, and correspondingly when an overload or leakage fault occurs in the circuit, the overload protection device 11 or the leakage protection mechanism drives the circuit breaker to release and switch off.

The plug-in circuit breaker of this embodiment is integrally inserted in the cabinet, and one end provided with incoming line terminal 13-1 and outgoing line terminal 13-2 is inserted in the cabinet and is connected with the copper bar in the cabinet in an inserting manner, incoming line terminal 13-1 and outgoing line terminal 13-2 are plug-in type connection terminals, each plug-in type connection terminal comprises a clamping elastic sheet for clamping the copper bar in the cabinet, two sets of U-shaped terminal slots are arranged on the upper and lower sides of the end surface of the incoming line and the outgoing line, and clamping elastic sheets of incoming line terminal 13-1 and outgoing line terminal 13-2 are respectively arranged in the two sets of terminal slots. The operation face is located outside the cabinet, makes the protection of circuit breaker divide-shut brake realization circuit through drive operation spare 1, locking mechanical system 2 is including can stretching outside the casing and retracting the locking arch in the casing, the spacing cooperation of frame groove joint on locking arch and the cabinet is convenient for reliably fix on the cabinet, draws unlocking mechanism through the operation and can make the locking arch retract in the casing, is convenient for insert and extract the circuit breaker. The operating element 1 of the present embodiment is a push button mechanism, and the push button is linearly movably mounted on the housing, but may be a pivotally disposed handle mechanism as needed. The indication window 19 is provided on the operation surface and on the lower side of the operation element 1, and the indication window 19 may be provided at other positions of the operation element 1 or the housing as needed. The operating part 1 of this embodiment is used as an unlocking mechanism for unlocking the locking mechanism 2, the locking mechanism 2 is connected to the operating part 1 through an unlocking connecting rod 2-1, the circuit breaker is switched on by pressing the operating part 1, the circuit breaker is switched off by pulling the operating part 1, the operating part 1 is pulled after the switching off, the operating part 1 drives a locking protrusion of the locking mechanism 2 to retract into the shell through the unlocking connecting rod 2-1 to pull out the circuit breaker, and of course, an independent unlocking mechanism can be arranged for unlocking the locking mechanism 2 as required.

The operating mechanism of this embodiment comprises a lever 3, a trip member 5 and a latch member 4, the moving contact assembly comprises a moving contact 7, the static contact component comprises a first static contact 8-1 and a second static contact 8-2, a contact rotating shaft 6 is rotatably arranged in the shell and is positioned between the first static contact 8-1 and the second static contact 8-2, the moving contact 7 is arranged on the contact rotating shaft 6, and both ends are respectively provided with a first contact point 7-1 and a second contact point 7-2 which are matched with the first static contact 8-1 and the second static contact 8-2, the jump buckle piece 5 and the locking piece 4 are rotatably arranged on the contact rotating shaft 6 and are in snap fit, the lever 3 is rotatably arranged in the shell, the jump buckle piece 5 is connected with the lever 3 through the first connecting piece 3-1, and the lever 3 is connected with the operating piece 1 through the second connecting piece 1-1.

As shown in the direction of fig. 2, by pressing the operating element 1, the operating element 1 drives the lever 3 to rotate through the second connecting element 1-1, and the lever 3 drives the contact rotating shaft 6 to rotate clockwise through the first connecting element 3-1 and the trip element 5, so as to drive the moving contact 7 to contact with the first static contact 8-1 and the second static contact 8-2 to close a conducting circuit, thereby realizing the closing of the circuit breaker; by pulling the operating part 1, the operating part 1 drives the lever 3 to rotate reversely through the second connecting part 1-1, the lever 3 drives the contact rotating shaft 6 to rotate anticlockwise through the first connecting part 3-1 and the trip part 5, and the moving contact 7 is driven to be separated from the first static contact 8-1 and the second static contact 8-2 to break a circuit, so that the opening of the circuit breaker is realized; when the circuit has a short-circuit fault, the protection mechanism acts to drive the locking piece 4, release the hasp matching of the locking piece 4 and the tripping piece 5, enable the contact rotating shaft 6 to rotate anticlockwise under the driving of the reset spring, drive the moving contact 7 to separate from the first static contact 8-1 and the second static contact 8-2 to break a circuit, and realize the tripping and the brake separating of the circuit breaker.

The plug-in circuit breaker is characterized in that an operating piece 1 for driving the circuit breaker to switch on and off is arranged on the end face of one end of the shell, an incoming line terminal 13-1 and an outgoing line terminal 13-2 are arranged on the end face of the other opposite end of the shell, and a double-breakpoint contact mechanism structure is adopted, so that the incoming line terminal 13-1 and the outgoing line terminal 13-2 are connected while the plug-in circuit breaker is inserted into a cabinet, the operation is convenient for a user, the safety is high, the breaking capacity is improved, and the plug-in circuit breaker can be suitable for circuits with higher voltage.

As shown in fig. 3, the contact structure of the circuit breaker of this embodiment is a rotary double-breakpoint structure, the contact rotating shaft 6 is rotatably installed in the housing and rotates around the axial direction thereof, a moving contact installation hole is radially provided on the contact rotating shaft 6, the moving contact 7 penetrates through the contact rotating shaft 6 through the moving contact installation hole, both ends of the moving contact extend out of the contact rotating shaft 6, the moving contact 7 is elastically fixed with the contact rotating shaft 6 through an elastic member to realize over travel, and a first contact point 7-1 and a second contact point 7-2 are respectively provided on different sides of both ends of the moving contact 7; the contact rotating shaft 6 is provided with a first mounting structure for mounting the tripping piece 5 and the locking piece 4, and the first mounting structure is a rotating shaft or a rotating hole.

The jump buckle piece 5 is rotatably arranged on the contact rotating shaft 6, and a jump buckle hook 5-2 in snap fit with the lock catch piece 4 and a first connecting hole connected with the first connecting piece 3-1 are convexly arranged on the jump buckle piece 5; the middle part of the locking piece 4 is rotatably arranged on the contact rotating shaft 6, one side of the locking piece 4 close to the jump buckle piece 5 is provided with a notch to form a locking platform 4-5, and the locking elastic piece 4-2 is arranged on the contact rotating shaft 6 to drive the locking piece 4 to rotate towards the direction close to the jump buckle piece 5 so that the locking platform 4-5 is in snap fit with the jump buckle hook 5-2; one end of the locking piece 4 extends to form a locking driving arm 4-1, one side of the locking driving arm 4-1 faces the short-circuit protection device 10 to serve as a first tripping part 4-4, the other side of the locking driving arm serves as a locking driving part 4-7, and the short-circuit protection device 10 drives the locking piece 4 to rotate through the first tripping part 4-4 so that the locking piece 4 and the tripping piece 5 are disengaged from each other; the other end of the locking piece 4 is provided with a tripping connecting rod 4-6, the tripping connecting rod 4-6 and a bimetallic strip of the overload protection device 11 are correspondingly used as a second tripping part, and the bimetallic strip pulls the locking piece 4 to rotate through the tripping connecting rod 4-6 so that the locking piece 4 and the tripping piece 5 are released from hasp matching. The first connecting piece 3-1 and the second connecting piece 1-1 are U-shaped rods. The circuit breaker provided by the invention has the advantages that the contact structure adopts a rotary double-breakpoint structure, the breaking capacity of the circuit breaker is improved, and the tripping piece 5 and the locking piece 4 are rotatably arranged on the contact rotating shaft 6 provided with the double-breakpoint movable contact 7, so that the space occupied by the operating mechanism and the contact rotating shaft 6 is reduced.

As shown in fig. 2 and 4-5, the first stationary contact 8-1 and the second stationary contact 8-2 are disposed on two radial sides of the contact rotating shaft 6, and the arc extinguishing mechanism includes a first arc extinguishing mechanism and a second arc extinguishing mechanism, which are respectively disposed corresponding to the first stationary contact 8-1 and the second stationary contact 8-2. When the breaker is opened or tripped, electric arcs generated between the first contact point 7-1 and the first static contact 8-1 of the movable contact 7 are led into the first arc extinguishing mechanism to be extinguished, and electric arcs generated between the second contact point 7-2 and the second static contact 8-2 are led into the second arc extinguishing mechanism to be extinguished.

The first arc extinguishing mechanism comprises a first arc extinguishing chamber and a first arc striking sheet 23-2, the second arc extinguishing mechanism comprises a second arc extinguishing chamber and a second arc striking sheet 23-1, a plurality of arc extinguishing grid sheets are respectively arranged in the first arc extinguishing chamber and the second arc extinguishing chamber, the first arc striking sheet 23-2 and the second arc striking sheet 23-1 are connected through a connecting plate 23-3 to form an arc striking assembly, a first contact point 7-1 of the movable contact 7 is matched with a first static contact 8-1 at the inlet end of the first arc extinguishing chamber, a second contact point 7-2 is matched with a second static contact 8-2 at the inlet end of the second arc extinguishing chamber, the movable contact 7 drives the first contact point 7-1 and the second contact point 7-2 at two ends to respectively rotate towards the direction close to the first arc striking sheet 23-2 and the second arc striking sheet 23-1 during opening, the electric arc on the moving contact 7 is respectively led into the first arc extinguish chamber and the second arc extinguish chamber through the first arc striking sheet 23-2 and the second arc striking sheet 23-1, when the moving contact 7 is switched on and off, the electric arc of the moving contact 7 can be transferred to the two arc striking sheets, so that two electric arcs which are connected in series are formed between a circuit of the wire inlet end and the wire outlet end, and the current limiting capacity and the switching-on and switching-off speed are improved.

The first arc striking plate 23-2 and the second arc striking plate 23-1 each comprise an arc striking bottom plate, and the arc striking bottom plate is arranged on one side of the corresponding arc extinguishing chamber and extends from the inlet end of the arc extinguishing chamber to the other end far away from the movable contact assembly, namely extends from the inlet end of the arc extinguishing chamber to the exhaust end of the other end so as to introduce the arc driven contact 7 into the arc extinguishing chamber for cutting and arc extinguishing.

Preferably, one end of each of the first static contact 8-1 and the second static contact 8-2 is provided with a static contact, the other end of each of the first static contact and the second static contact is provided with a first extension section 8-3 and a second extension section 8-4, and the first extension section 8-3 and the second extension section 8-4 extend to the end of each of the first arc extinguish chamber and the second arc extinguish chamber far away from the movable contact assembly, namely extend from the inlet end of the arc extinguish chamber to the exhaust end of the other end of the arc extinguish chamber, so that the electric arc is transferred from the static contact to the extension ends to be led into the arc extinguish chamber for cutting and arc extinguishing; the first extension section 8-3 and the arc striking bottom plate of the first arc striking piece 23-2 are oppositely arranged and are respectively positioned at two sides of the first arc extinguishing chamber, the second extension section 8-4 and the arc striking bottom plate of the second arc striking piece 23-1 are oppositely arranged and are respectively positioned at two sides of the second arc extinguishing chamber, and the two arc extinguishing chambers are respectively arranged between the two extension sections and the arc striking bottom plate.

Preferably, the connecting plate 23-3 is stacked with the contact rotating shaft 6 and located at one axial end of the contact rotating shaft 6, as shown in fig. 2 and 5, the connecting plate 23-3 is located below the contact rotating shaft 6, and fig. 5 is a schematic structural view of removing the contact rotating shaft 6.

As shown in fig. 4, a preferred embodiment of an arc striking assembly of the arc extinguishing mechanism comprises a first arc striking plate 23-2, a second arc striking plate 23-1 and a connecting plate 23-3 connected between the first arc striking plate 23-2 and the second arc striking plate 23-1; the first arc striking piece 23-2 and the second arc striking piece 23-1 respectively comprise an arc striking bottom plate and two arc striking side walls which are respectively positioned at two sides of one end of the arc striking bottom plate, the arc striking bottom plate is arranged at one side of the corresponding arc extinguishing chamber and extends from the inlet end of the arc extinguishing chamber to the other end far away from the movable contact assembly, the two arc striking side walls are oppositely arranged at two sides of the inlet end of the arc extinguishing chamber, the two arc striking side walls are respectively connected with the side edges at two sides of one end of the arc striking bottom plate, and the arc striking side walls can increase the magnetic blowing capacity of an electric arc area and further push electric arcs to move towards the arc extinguishing chamber; the outer side of the preferred arc striking side wall is wrapped by an insulating layer which can be insulating plastic made of gas generating materials, the insulating layer can isolate electric arcs, and the electric arcs are further pushed to move towards the arc extinguishing chamber through gas flow by generating gas at high temperature through the insulating plastic. Namely, the arc striking bottom plate of the first arc striking plate 23-2 is arranged at one side of the first arc extinguishing chamber and extends from the inlet end of the first arc extinguishing chamber to the other end far away from the moving contact assembly, and two arc striking side walls of the first arc striking plate 23-2 are oppositely arranged at two sides of the inlet end of the first arc extinguishing chamber; the arc striking bottom plate of the second arc striking plate 23-1 is arranged on one side of the second arc extinguishing chamber and extends from the inlet end of the second arc extinguishing chamber to the other end far away from the moving contact assembly, and two arc striking side walls of the second arc striking plate 23-1 are oppositely arranged on two sides of the inlet end of the second arc extinguishing chamber.

The arc striking bottom plate is parallel to arc extinguishing grid pieces corresponding to the arc extinguishing chambers, the arc striking side wall is perpendicular to the arc striking bottom plate, the plane where the connecting plate 23-3 is located is perpendicular to the arc striking bottom plate and is parallel to the arc striking side wall, the arc striking assembly is convenient to assemble on the lower side of the contact rotating shaft 6, and the arc striking assembly is integrally bent and formed and can be formed by welding a plurality of elements.

As shown in fig. 2, in the circuit breaker of this embodiment, an operating element 1 is disposed at one end of a housing, an incoming line terminal 13-1 and an outgoing line terminal 13-2 are disposed at the other end of the housing, an end surface on which the operating element 1 is disposed is an operating surface, an end surface on which the incoming line terminal 13-1 and the outgoing line terminal 13-2 are disposed is an incoming line end surface, an overload protection device 11 and a contact rotating shaft 6 are disposed in parallel in the middle of the housing, a lever 3, a first stationary contact 8-1 and a first arc extinguishing mechanism are disposed in parallel and between the operating surface and the contact rotating shaft 6, the lever 3 is disposed between the operating element 1 and the contact rotating shaft 6, and a second stationary contact 8-2, a second arc extinguishing mechanism and a short-circuit protection device 10 are disposed in parallel and between the contact rotating shaft 6 and the incoming line end surface. The first static contact 8-1, the short-circuit protection device 10 and the incoming line terminal 13-1 are sequentially arranged along the direction from the operating surface to the incoming and outgoing line end surface and are positioned at the upper side of the width direction of the shell, the operating element 1, the lever 3, the overload protection device 11, the second static contact 8-2 and the outgoing line terminal 13-2 are sequentially arranged along the direction from the operating surface to the incoming and outgoing line end surface and are positioned at the lower side of the width direction of the shell, and the first arc extinguishing mechanism, the contact rotating shaft 6 and the second arc extinguishing mechanism are sequentially arranged at the middle side of the width direction of the shell along the direction from the operating surface to the incoming and outgoing line end surface; the main circuit of the circuit breaker of the embodiment is electrically connected with the outlet terminal 13-2 through the inlet terminal 13-1, the short-circuit protection device 10, the first static contact 8-1, the moving contact 7, the second static contact 8-2, the overload protection device 11 in sequence. Certainly, as another embodiment, the positions and the connection sequence of the short-circuit protection device 10 and the overload protection device 11 may be interchanged, that is, the short-circuit protection device 10 and the contact rotating shaft 6 are arranged in parallel in the middle of the housing, and the second stationary contact 8-2, the second arc extinguishing mechanism, and the overload protection device 11 are arranged in parallel between the contact rotating shaft 6 and the end face of the incoming/outgoing line. As another embodiment, the positions of the incoming terminal 13-1 and the outgoing terminal 13-2 can be interchanged. According to the direction shown in fig. 2, the direction from the operation surface to the end surface of the incoming and outgoing lines is the longitudinal direction of the circuit breaker, the direction from the incoming terminal 13-1 to the outgoing terminal 13-2 is the width direction of the circuit breaker, and the direction perpendicular to the plane shown in fig. 2 is the thickness direction of the circuit breaker.

Preferably, a current sampling device 12-1 and/or a temperature sampling device 12-2 and the like are further arranged in the shell of the circuit breaker, the current sampling device 12-1 and/or the temperature sampling device 12-2 are connected with a signal port 21, sampling signals are transmitted to the outside through the signal port 21, and the signal port 21 is arranged on the end face of an incoming line and an outgoing line, and is preferably located between the incoming line terminal 13-1 and the outgoing line terminal 13-2. The current sampling device 12-1 is connected to the main loop, preferably, the current sampling device 12-1 is arranged near the end face of the incoming line and the outgoing line and is located between the incoming line terminal 13-1 and the short-circuit protection device 10, the current sampling device 12-1 of the embodiment adopts a mutual inductor, and certainly, the current sampling device can also be other circuit sampling devices such as a manganin shunt. The temperature sampling device 12-2 is arranged near the incoming line terminal 13-1 and the outgoing line terminal 13-2, the temperature sampling device 12-2 can adopt thermistors, the two thermistors are respectively arranged in close contact with the incoming line terminal 13-1 and the outgoing line terminal 13-2, and temperature sampling signals are transmitted through the signal port 2. The plug-in circuit breaker is reasonable in layout, is provided with the short-circuit protection device 10, the overload protection device 11, the current sampling device 12-1, the temperature sampling device 12-2 and the like, and meets more functional requirements in a limited space.

The invention also provides an improvement point that an indicating device is arranged in the circuit breaker and can indicate the tripping and opening state of the circuit breaker.

As shown in fig. 6 to 9, in the first embodiment of the indicating device, the indicating device of the present embodiment includes an alarm indicating member 14 and a second elastic member, the alarm indicating member 14 is rotatably installed in the housing, the second elastic member acts on the alarm indicating member 14, the alarm indicating member 14 is provided with an alarm indicating surface 14-2, when the circuit breaker is tripped and opened, the snap fastener 5 and the latch fastener 4 are disengaged from each other, the snap fastener 5 or the latch fastener 4 drives the alarm indicating member 14 to rotate, so that the alarm indicating surface 14-2 corresponds to the indicating window 19, and the trip and open states of the circuit breaker can be indicated, so as to implement fault alarm. The snap fastener 5 or the locking fastener 4 can directly or indirectly drive the alarm indicator 14.

As shown in fig. 10 to 13, in the second embodiment of the indicating device, the indicating device of this embodiment further includes a switching indicator 15 and a first elastic member on the basis of the first embodiment, the switching indicator 15 is rotatably installed in the housing, the first elastic member acts on the switching indicator 15, the switching indicator 15 is provided with a switching indicator surface 15-2, and when the circuit breaker is switched on or switched off, the operating member 1 or the operating mechanism or the contact rotating shaft 6 drives the switching indicator 15, so that the switching indicator surface 15-2 and the indicating window 19 correspondingly indicate the switching state.

Namely, when the circuit breaker is switched on, the operating part 1 or the operating mechanism or the contact rotating shaft 6 drives the switching-on/off indicating part 15 to rotate and compress the first elastic part, so that the switching-on indicating area of the switching-on/off indicating part surface 15-2 corresponds to the indicating window 19 to indicate that the circuit breaker is switched on, when the circuit breaker is switched off, the operating part 1 or the operating mechanism or the contact rotating shaft 6 and the switching-on/off indicating part 15 avoid the switching-on/off indicating part 15, and the first elastic part drives the switching-off indicating area of the switching-on/off indicating part 15 to correspond to the indicating window 19 to indicate that the circuit breaker is switched off; when the circuit breaker is switched on, the operating part 1 or the operating mechanism or the contact rotating shaft 6 avoids the switching-on indicating part 15, the first elastic part drives the switching-on indicating area of the switching-on and switching-off indicating part 15 to correspond to the indicating window 19 to indicate that the circuit breaker is switched on, and when the circuit breaker is switched off, the operating part 1 or the operating mechanism or the contact rotating shaft 6 drives the switching-on indicating part 15 to rotate and compress the first elastic part, so that the switching-off indicating area and the indicating window 19 correspond to indicate that the circuit breaker is switched off. The operating element 1 or the operating mechanism or the contact rotating shaft 6 can directly or indirectly drive the opening and closing indicating element 15.

It should be noted that the indication windows 19 corresponding to the opening and closing indicator 15 and the alarm indicator 14 may be the same window, may be two areas of one window, or may be two independent windows, all of which belong to the protection scope created by the present invention.

As a preferred embodiment, the rotation axes of the switching indicator 15 and the alarm indicator 14 are concentrically arranged and mounted on the same rotation shaft in the housing, the first elastic member and the second elastic member are the same elastic member, in this embodiment, the indication spring 22 is used, two sides of the indication spring 22 respectively act on the switching indicator 15 and the alarm indicator 14, and the indication spring 22 enables the switching indicator 15 and the alarm indicator 14 to be reset to the same side (in fig. 10, in a counterclockwise direction).

As shown in fig. 10-13, preferably, a first pivot portion is disposed in the middle of the switching indicator 15, one end of the first pivot portion is a first swing arm 15-1, the other end of the first pivot portion is a first indicator arm, an arc-shaped switching indicator surface 15-2 is disposed at an end of the first indicator arm, a switching indication area and a switching indication area are disposed on the switching indicator surface 15-2, and the switching indication area are in different colors or characters or symbols and are respectively used for indicating a switching state and a switching state. The middle part of the alarm indicating piece 14 is provided with a second pivot part, one end of the second pivot part is a second swing arm 14-3, the other end of the second pivot part is a second indicating arm, the end part of the second indicating arm is provided with an arc-shaped alarm indicating surface 14-2, and the alarm indicating surface 14-2 is provided with colors, characters or symbols for indicating tripping and opening states.

Preferably, the indicating spring 22 is installed between the first pivot portion and the second pivot portion. One of the first pivoting part and the second pivoting part is provided with a spring assembly groove 15-3, the other pivoting part is provided with a spring assembly boss, the spring assembly groove and the spring assembly boss are respectively provided with a pivoting hole for a rotating shaft to penetrate through, the indicating spring 22 is sleeved on the spring assembly boss, the spring assembly boss is correspondingly assembled in the spring assembly groove, and an elastic arm of the indicating spring 22 respectively acts on the opening and closing indicating member 15 and the alarm indicating member 14.

Preferably, the height of the closing indication area and the height of the opening indication area of the opening and closing indication part surface 15-2 are set to form a step structure, and the alarm indication surface 14-2 can rotatably shield the closing indication area or the opening indication area at the lower part of the step structure and is limited with the side wall of the step structure. When the breaker is tripped and is opened, the alarm indicating surface 14-2 shields a switching-on indicating area or a switching-off indicating area at the lower part of the step structure and corresponds to the indicating window 19.

When the circuit breaker is opened or closed, the lever 3 of the operating mechanism acts on the opening and closing indicator 15. Preferably, the lever 3 is provided with a first protrusion 3-2, when the circuit breaker is switched on, the first protrusion 3-2 of the lever 3 acts on the first swing arm 15-1 to rotate the switching-on/off indicating member 15, the switching-on/off indicating member 15 rotates clockwise, and the switching-on/off indicating member face 15-2 displays a switching-on state on the indicating window 19 (in this embodiment, the upper side represents a switching-off indicating area, and the lower side represents a switching-on indicating area); when the circuit breaker is opened, the first protrusion 3-2 of the lever 3 is separated from the first swing arm 15-1, the opening and closing indicating piece 15 is acted by the indicating spring 22, the opening and closing indicating piece surface 15-2 is reset and rotated, and the opening and closing indicating piece surface 15-2 displays the opening state on the indicating window 19.

When the fault tripping and the brake opening are carried out, the tripping part 5 and the locking part 4 are separated from each other by releasing the snap fit, and the tripping part 5 or the locking part 4 triggers the alarm indicator 14; the alarm indicating surface 14-2 of the alarm indicating piece 14 corresponds to the indicating window 19 to indicate that the circuit breaker belongs to the fault tripping opening. Preferably, the alarm indication surface 14-2 shields the opening and closing indication part surface 15-2, so that only alarm indication appears in the indication window 19 to warn the breaker to open due to faults.

Preferably, the indicating device further comprises a swing rod 16, a sliding block 17, a first return spring 16-1 and a second return spring 17-1, the swing rod 16 is rotatably arranged in the shell, the first return spring 16-1 acts on the swing rod 16, the sliding block 17 is slidably arranged in the shell, and the second return spring 17-1 acts on the sliding block 17; as shown in fig. 6 and 8, when the circuit breaker is switched on, the operating element 1 or the operating mechanism or the moving contact assembly can drive the slider 17 to move, so that the slider 17 drives the alarm indication surface 14-2 of the alarm indication member 14 to be far away from the indication window 19, and the slider 17 is limited by the swing rod 16, as shown in fig. 7 and 9, when the circuit breaker is switched off and switched off, the snap fastener 5 and the latch member 4 are disengaged, the snap fastener 5 or the latch member 4 pushes the swing rod 16 to move, so that the swing rod 16 is disengaged from the limit of the slider 17, the second return spring 17-1 drives the slider 17 to move, so that the alarm indication surface 14-2 of the alarm indication member 14 is driven by the indication spring 22 to be away from the indication window 19. As shown in fig. 11, when the circuit breaker is normally opened, the locking piece 4 and the tripping piece 5 keep in snap fit and rotate along with the contact rotating shaft 6, so that the swinging rod 16 cannot be touched, the sliding block 17 and the swinging rod 16 keep limited, and the sliding block 17 cannot reset.

In this embodiment, when the circuit breaker is switched on, the lever 3 of the operating mechanism drives the sliding block 17 to move, so that the sliding block 17 drives the alarm indication surface 14-2 of the alarm indication part 14 to be away from the indication window 19, the sliding block 17 is limited by the swing rod 16, the lever 3 is provided with the second protrusion 3-3 for driving the sliding block 17, the arrangement of the sliding block 17 and the indication mechanism is convenient, and the structural layout is reasonable. Of course, the slider 17 can also be directly or indirectly driven by the operating element 1 or by another element of the movable contact assembly or operating mechanism, such as the contact shaft 6 or the movable contact 7 or the first connecting element 3-1 and the second connecting element 1-1.

Preferably, the sliding block 17 is provided with a first limit part 17-2 in limit fit with the swing rod 16, a first trigger part 17-3 for driving the alarm indicator 14, and a first driving part for matching with the second return spring 17-1. A preferable embodiment is that the sliding block 17 is in a T shape and comprises a sliding block main body arranged transversely and a trigger arm arranged vertically, the sliding block main body is arranged in the shell in a linear sliding mode, one end of the sliding block main body is used as a first driving part matched with a second return spring 17-1, the other end of the sliding block main body is used as a first limiting part 17-2 in limiting fit with the swing rod 16, the trigger arm is connected with the middle part of the sliding block main body in a T shape, the trigger arm extends to a position between the alarm contact 18-2 and a second bulge 3-3 of the lever 3, the alarm indicating piece 14 is arranged on one side of the trigger arm along the sliding direction of the sliding block 17, one side edge of the trigger arm is used as a first trigger part 17-3 for driving the alarm indicating piece 14, and the other side edge of the trigger arm is used as a second driving part matched with the operating piece 1 or the operating mechanism or the movable contact component. When the circuit breaker is switched on, the second bulge 3-3 of the lever 3 drives the sliding block 17 to move, so that the sliding block 17 drives the alarm indicating surface 14-2 of the alarm indicating part 14 to be far away from the indicating window 19, and the sliding block 17 is limited with the swing rod 16. The second return spring 17-1 of the present embodiment is a compression spring, and the compression spring is connected between the housing and the first driving portion, but may also be a torsion spring, a leaf spring, or other elastic members. The operating part 1 is a button in sliding fit with the shell, the sliding block 17 is arranged between the operating surface and the contact rotating shaft 6 in a sliding mode, the sliding direction of the sliding block 17 is parallel to the sliding direction of the operating part 1, the alarm indicating part 14 is arranged between the lever 3 and the operating surface, and the second return spring 17-1 is arranged between the operating surface and the first driving part.

Preferably, the swing rod 16 is provided with a second limit part 16-2 in limit fit with the slider 17, a second trigger part 16-3 in limit fit with the locking piece 4 or the jump buckle piece 5, and a first driving part in match with the first return spring 16-1. A preferred embodiment is that the swing rod 16 is respectively provided with a first swing arm and a second swing arm in a protruding manner, the end of the first swing arm is used as a second limiting part 16-2, the second swing arm is provided with a limiting structure which is used as a first driving part matched with the first return spring 16-1, and one side edge of the second swing arm is used as a second triggering part 16-3. The limiting mechanism of the embodiment is a limiting groove, and can be a limiting convex rib and other structures. The first reset spring 16-1 is a torsion spring, the torsion spring is sleeved on a shaft in the shell, one elastic arm is limited with the shell, the other elastic arm extends into a limit groove serving as a first driving part, the second triggering part 16-3 of the swing rod 16 is driven to rotate towards the direction close to the locking part 4 or the jump buckle part 5, and the second limiting part 16-2 is driven to rotate towards the direction in limit fit with the sliding block 17. Of course, the first return spring 16-1 may be a compression spring or a leaf spring or other elastic member.

Preferably, the swing link 16 is coaxially installed with the rotation axis of the contact rotation shaft 6 and is disposed below the contact rotation shaft 6. Preferably, the connecting plate 23-3 and the swing rod 16 are both located at one axial end of the contact rotating shaft 6, and the first swing arm and the second swing arm are located on two radial sides of the rotating shaft center of the contact rotating shaft 6 opposite to the connecting plate 23-3, so that the layout is reasonable and compact.

Preferably, the sliding block 17 is arranged between the operation surface and the contact rotating shaft 6 in a sliding mode, the sliding direction of the sliding block 17 is parallel to the sliding direction of the operation piece 1, and the alarm indicating piece 14 and the switching-on/off indicating piece 15 are arranged between the lever 3 and the operation surface. The shell is internally provided with a sliding groove 17-4 matched with the sliding block 17, the side wall of one side of the sliding groove 17-4 is provided with a sliding opening 17-5, a second reset spring 17-1 is arranged in the sliding groove 17-4 and is positioned between the operation end face and the sliding block main body, the sliding block main body slides in the sliding groove 17-4, and the trigger arm extends out from the sliding opening 17-5, moves in the sliding opening 17-5 and is limited by the sliding opening 17-5 to move.

Preferably, the lever 3 is provided with a third connecting hole and a second connecting hole which are respectively connected with the first connecting piece 3-1 and the second connecting piece 1-1, a first protrusion 3-2 for driving the opening and closing indicating piece 15 is arranged on one side of the lever 3 in the radial direction, and a second protrusion 3-3 for driving the sliding block 17 is arranged on the other side of the lever 3 in the radial direction.

Under the normal state of the circuit breaker, the sliding block 17 is locked by the swing rod 16, and the first triggering part 17-3 of the sliding block 17 acts on the second swing arm 14-3 of the alarm indicating part 14, so that the alarm indicating surface 14-2 is far away from the indicating window 19. When the fault tripping and opening are carried out, the tripping piece 5 or the locking piece 4 triggers the swing rod 16 to swing to remove the limit fit with the sliding block 17, the sliding block 17 slides to enable the first triggering part 17-3 to be separated from the second swing arm 14-3, the alarm indicating piece 14 rotates under the action of the indicating spring 22, the alarm indicating surface 14-2 shields the opening and closing indicating piece surface 15-2, and therefore only the alarm state is displayed in the indicating window 19. When the switch is switched on again, the second bulge 3-3 of the lever 3 pushes the sliding block 17 to slide, the swing rod 16 rotates and locks the sliding block 17, the first trigger part 17-3 of the sliding block 17 acts on the alarm indicating part 14 again, and the alarm indicating surface 14-2 leaves the indicating window 19.

Preferably, when tripping and opening the brake, the latch 4 drives the swing rod 16, so that the alarm indication surface 14-2 of the alarm indication member 14 corresponds to the indication window 19, thereby realizing alarm indication. Referring to fig. 6, 8 and 10, when the circuit breaker is switched on, the latch 4 is in snap fit with the trip 5; as shown in fig. 7, 9 and 12, when the circuit breaker is tripped and opened, the latch member 4 is driven to release the snap-fit with the trip member 5, one side of the latch driving arm 4-1 of the latch member 4, which faces the swing link 16, serves as a latch driving portion 4-7 to push the second triggering portion 16-3, so that the swing link 16 rotates counterclockwise according to fig. 9 to release the limit fit with the slider 17, after the trip member 5 releases the snap-fit with the latch member 4, the convex end angle 5-1 of the jump buckle piece 5 pushes the lock buckle side edge 4-3 provided with a lock buckle hook of the lock buckle piece 4, so that the lock buckle driving arm 4-1 accelerates to push the swing rod 16 to move, the engagement between the swing rod 16 and the slide block 17 is released, the second return spring 17-1 releases energy to enable the slide block 17 to be separated from the alarm indicating piece 14, the alarm indicating piece 14 rotates under the action of the indicating spring 22, and the alarm indicating surface 14-2 shields the opening and closing indicating piece surface 15-2.

Preferably, as shown in fig. 14 to 16, an auxiliary contact device is arranged in the circuit breaker, and the auxiliary contact device is linked with the operating mechanism to feed back a circuit breaker opening and closing signal, so as to monitor the opening and closing state of the circuit breaker. The auxiliary contact device comprises an auxiliary contact 18-1, when the circuit breaker is switched on and switched off, the operating mechanism drives the auxiliary contact 18-1 to switch states, switching-on and switching-off signals of the circuit breaker are fed back, and the switching-on and switching-off states of the circuit breaker are monitored by acquiring the states of the auxiliary contact 18-1. Preferably, the auxiliary contact 18-1 transmits a signal through the signal port 21 or other signal ports, and is used for monitoring the opening and closing state of the circuit breaker.

The auxiliary contact 18-1 of the auxiliary contact device of the embodiment is a microswitch, and the auxiliary contact 18-1 is matched with the lever 3 of the operating mechanism; the lever 3 is provided with a first bulge 3-2, when the breaker is switched on, the first bulge 3-2 of the lever 3 rotates towards the auxiliary contact 18-1 to trigger a microswitch as the auxiliary contact 18-1, so that the contact in the microswitch is switched; when the breaker is opened, the first bulge 3-2 of the lever 3 rotates to be far away from the microswitch, and the microswitch is released, and the internal contact of the microswitch is reset to an initial state switching state. Of course, as another embodiment, when the circuit breaker is switched on, the lever 3 is retracted away from the microswitch, and when the circuit breaker is switched off, the microswitch is touched and driven to switch the state. In addition, as another embodiment, the auxiliary contact device may be linked with the operating element 2 or the contact rotating shaft 6, or linked with other elements of the operating mechanism, and the auxiliary contact 18-1 may be driven by the operating element 2 or the contact rotating shaft 6 or other elements of the operating mechanism to switch states when the circuit breaker is switched on and off. If the first supporting protrusion is protruded in the radial direction of the contact rotating shaft 6, when the circuit breaker is switched on, the first supporting protrusion of the contact rotating shaft 6 rotates away from the auxiliary contact 18-1, the auxiliary contact 18-1 is reset to be in a cut-off state, and when the circuit breaker is switched off, the first supporting protrusion rotates to trigger the auxiliary contact 18-1 to be in a switching state.

Preferably, a circuit board 20 is arranged in the circuit breaker, a microswitch serving as the auxiliary contact 18-1 is mounted on the circuit board 20, the circuit board 20 and the operating mechanism are arranged in a stacked manner, the circuit board 20 is positioned below the operating mechanism in the thickness direction of the circuit breaker, and a signal port 21 is arranged on the circuit board 20 and used for transmitting a weak current monitoring signal to an upper computer.

The auxiliary contact 18-1 is arranged near one end of the operation surface, the signal port 21 is positioned on the end surface of the access line, the circuit board 20 extends from the operation surface to the end surface of the access line, and is stacked below the operation mechanism and other mechanisms in the thickness direction of the circuit breaker and can be separated and isolated through a partition plate. The auxiliary contact 18-1 described in this embodiment is a microswitch, but may also be an elastic contact arranged on a circuit board or other structures. Preferably, the circuit board 20 may further be provided with an auxiliary indicator light, the auxiliary indicator light is connected to a signal loop of the auxiliary contact 18-1, the auxiliary contact 18-1 outputs a switching-on/off signal when closed, the auxiliary indicator light is turned on to indicate a switching-on/off state of the circuit breaker, and the auxiliary indicator light may correspond to the indication window 19.

Preferably, an alarm contact device is arranged in the circuit breaker and comprises an alarm contact 18-2, when the circuit breaker is tripped and is switched off, the snap fastener 5 and the lock fastener 4 are disengaged from a snap fit, the snap fastener 5 or the lock fastener 4 drives the alarm contact 18-2 to be in a switching state, and a tripping and switching-off signal is fed back. The tripping part 5 or the locking part 4 can directly or indirectly drive the alarm contact 18-2.

Preferably, the alarm contact device of the embodiment comprises an alarm contact 18-2, a swing rod 16, a sliding block 17, a first return spring 16-1 and a second return spring 17-1, wherein the swing rod 16 is rotatably arranged in a shell, the first return spring 16-1 acts on the swing rod 16, the sliding block 17 is slidably arranged in the shell, and the second return spring 17-1 acts on the sliding block 17. When the circuit breaker is switched on, the operating part 1 or the operating mechanism or the moving contact component drives the sliding block 17 to move, so that the second return spring 17-1 stores energy, the alarm contact 18-2 is switched, and the sliding block 17 and the oscillating bar 16 are limited; when the circuit breaker is tripped and is switched off, the snap fastener 5 and the snap fastener 4 are in snap fit, the snap fastener 4 or the snap fastener 5 pushes the swing rod 16 to move, the swing rod 16 is enabled to be free from limiting with the slide block 17, the second reset spring 17-1 releases energy to drive the slide block 17 to reset, and the alarm contact 18-2 is enabled to be in a switching state and used for feeding back the tripping state of the circuit breaker to serve as an alarm prompt.

In the embodiment, when the circuit breaker is switched on, the operating mechanism drives the sliding block 17 to move to touch the alarm contact 18-2, so that the alarm contact 18-2 is switched to the closed state, when the circuit breaker is tripped and switched off, the second return spring 17-1 drives the sliding block 17 to reset to be far away from the alarm contact 18-2, and the alarm contact 18-2 is reset to be switched to the open state. When the breaker is normally opened, the locking fastener 4 and the tripping fastener 5 keep in snap fit to rotate along with the contact rotating shaft 6, the swing rod 16 cannot be touched, the sliding block 17 and the swing rod 16 are kept limited, and the sliding block 17 cannot reset.

As another embodiment, when the circuit breaker is switched on, the operating mechanism drives the sliding block 17 to move away from the alarm contact 18-2, so that the alarm contact 18-2 resets the switching state and is limited with the swing rod 16, when the circuit breaker is tripped and switched off, the tripping piece or the locking piece pushes the swing rod 16 to move, so that the swing rod 16 is relieved from limiting with the sliding block 17, and the second return spring 17-1 drives the sliding block 17 to reset and touch the alarm contact 18-2 to switch the state. Of course, the alarm contact 18-2 may also be a normally closed contact, which is touched to switch to an open state when the circuit breaker is switched on, and is reset to switch to a closed state without being touched when the circuit breaker is tripped and switched off, so as to feed back the tripped state of the circuit breaker.

Preferably, in the embodiment, when the circuit breaker is switched on, the lever 3 of the operating mechanism drives the sliding block 17 to move, so that the second return spring 17-1 stores energy, the alarm contact 18-2 is switched, and the sliding block 17 and the swing rod 16 are limited. Of course, it is also possible to drive the direct or indirect slider 17, for example, the contact shaft 6 or the movable contact 7 or the first connecting part 3-1 and the second connecting part 1-1, by means of the operating element 1 or another element of the movable contact assembly or operating mechanism. Preferably, a signal port 21 is arranged on the shell, a circuit board 20 is arranged in the shell, a microswitch serving as the alarm contact 18-2 is arranged on the circuit board 20 and connected with the signal port 21, and weak current monitoring signals are transmitted to an upper computer through the signal port 21. The alarm contact 18-2 described in this embodiment is a microswitch, but may also be an elastic contact arranged on a circuit board or other structures. The circuit board 20 may further be provided with an alarm indicator light, and the alarm indicator light is connected to a signal loop of the alarm contact 18-2 and used for indicating whether the circuit breaker is tripped or not.

The slider 17 and the swing rod 16 of the alarm contact device of the embodiment have similar structures with the slider 17 and the swing rod 16 of the indicating device. The slide block 17 is provided with a first limit part 17-2 in limit fit with the swing rod 16, a first trigger part 17-3 for driving the alarm contact 18-2 and a first drive part for matching with the second reset spring 17-1, the slide block 17 of the embodiment is in a T shape and comprises a slide block main body arranged transversely and a trigger arm arranged vertically, the slide block main body is linearly and slidably arranged in the shell, one end of the slide block main body is used as the first drive part matched with the second reset spring 17-1, the other end of the slide block main body is used as the first limit part 17-2 in limit fit with the swing rod 16, the trigger arm is connected with the middle part of the slide block main body into a T shape, a microswitch used as the alarm contact 18-2 is arranged on one side of the trigger arm along the sliding direction of the slide block 17, one side edge of the trigger arm is used as the first trigger part 17-3 for driving the alarm contact 18-2, the other side edge of the trigger arm is used as a second driving part matched with the operating element 1 or the operating mechanism or the movable contact assembly. The operating part 1 is a button in sliding fit with the shell, the sliding block 17 is arranged between the operating surface and the contact rotating shaft 6 in a sliding mode, the sliding direction of the sliding block 17 is parallel to the sliding direction of the operating part 1, the alarm contact 18-2 is arranged between the lever 3 and the operating surface, and the second return spring 17-1 is arranged between the operating surface and the first driving part.

Preferably, the lever 3 is provided with a third connecting hole and a second connecting hole which are respectively connected with the first connecting piece 3-1 and the second connecting piece 1-1, one radial side of the lever 3 is provided with a first protrusion 3-2 linked with the auxiliary contact device, the other radial side of the lever 3 is provided with a second protrusion 3-3 linked with the alarm contact 18-2, the alarm contact 18-2 is arranged on one side of the lever 3 close to the operating piece 1, and the auxiliary contact 18-1 is arranged on one side of the lever 3 far away from the operating piece 1.

The swing rod 16 is rotatably installed in the shell, a second limiting portion 16-2 in limiting fit with the sliding block 17, a second triggering portion 16-3 in limiting fit with the locking piece 4 or the jump locking piece 5 and a first driving portion in matching with the first return spring 16-1 are arranged on the swing rod 16, a first swing arm and a second swing arm are respectively and convexly arranged in the radial direction of the swing rod 16 of the embodiment, the end portion of the first swing arm serves as the second limiting portion 16-2, a limiting structure is arranged on the second swing arm and serves as the first driving portion in matching with the first return spring 16-1, the limiting mechanism of the embodiment is a limiting groove, a limiting convex rib and other structures can be adopted, and one side edge of the second swing arm serves as the second triggering portion 16-3. Preferably, the swing rod 16 is coaxially installed with the rotation axis of the contact rotation shaft 6 and is arranged below the contact rotation shaft 6, preferably, the connection plate 23-3 and the swing rod 16 are both located at one axial end of the contact rotation shaft 6, and the first swing arm and the second swing arm are located at two radial sides of the rotation axis of the contact rotation shaft 6 opposite to the connection plate 23-3, respectively, so that the layout is reasonable and compact.

As shown in fig. 14 and 16, when the circuit breaker is switched on, the second protrusion 3-3 of the lever 3 pushes the slider 17 to move and enables the first limiting portion 17-2 of the slider and the second limiting portion 16-2 of the swing rod to be engaged and limited with each other, at this time, the second return spring 17-1 stores energy, the first triggering portion 17-3 of the slider 17 touches the alarm contact 18-2, see fig. 5, at this time, the locking piece 4 is in snap fit with the tripping piece 5; as shown in fig. 15 (refer to fig. 8-9), when the circuit breaker is tripped and opened, the latch member 4 is driven to release the snap fit with the trip member 5, one side of the latch driving arm 4-1 of the latch member 4 facing the swing link 16 is used as a latch driving part 4-7 to push the second triggering part 16-3, so that the swing link 16 rotates counterclockwise according to fig. 6 to release the limit fit with the slider 17, after the trip member 5 releases the snap fit with the latch member 4, the convex end angle 5-1 of the latch member 4 pushes the latch side 4-3 with the latch hook of the latch member 4, so that the latch driving arm 4-1 accelerates to push the swing link 16 to move, the latch of the swing link 16 and the slider 17 is released, the second reset spring 17-1 releases energy to enable the slider 17 to be separated from the alarm contact 18-2, and the alarm contact 18-2 switches states.

Obviously, the auxiliary contact device, the alarm contact device and the indicating device of the present embodiment may be provided entirely or only one or two of them may be provided as required. Moreover, the auxiliary contact device, the alarm contact device and the indicating device of the embodiment of the present invention are not only suitable for a contact structure with a double-breakpoint structure, but also suitable for a single-breakpoint contact structure with only one fixed contact.

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

The foregoing is a more detailed description of the invention, taken in conjunction with the accompanying preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the inventive concept, and all should be considered as falling within the protection scope of the invention.

Claims (13)

1. The utility model provides a circuit breaker, includes the casing and sets up operating device and indicating device in the casing, operating device includes snap-fit's jump buckle spare (5) and hasp spare (4), its characterized in that: the indicating device comprises an alarm indicating piece (14) and a second elastic piece, wherein the alarm indicating piece (14) is rotatably installed in the shell, the second elastic piece acts on the alarm indicating piece (14), the alarm indicating piece (14) is provided with an alarm indicating surface (14-2), when the circuit breaker is tripped and is switched off, the tripping piece (5) and the locking piece (4) are disengaged from each other in a snap fit manner, the tripping piece (5) or the locking piece (4) drives the alarm indicating piece (14) to rotate, and the alarm indicating surface (14-2) corresponds to the indicating window (19).

2. The circuit breaker of claim 1, wherein: the operating mechanism comprises a lever (3), a tripping piece (5) and a locking piece (4), the moving contact assembly comprises a moving contact (7) and a contact rotating shaft (6), the contact rotating shaft (6) is rotatably installed in the shell, the moving contact (7) is arranged on the contact rotating shaft (6), the tripping piece (5) and the locking piece (4) are rotatably installed on the contact rotating shaft (6) and in hasp fit, the lever (3) is rotatably installed in the shell, the tripping piece (5) is connected with the lever (3) through a first connecting piece (3-1), and the lever (3) is connected with the operating piece (1) through a second connecting piece (1-1).

3. The circuit breaker of claim 2, wherein: indicating device still includes divide-shut brake indicator (15) and first elastic component, divide-shut brake indicator (15) rotate to be installed in the casing, first elastic component acts on divide-shut brake indicator (15), divide-shut brake indicator (15) are equipped with divide-shut brake indicator face (15-2), during circuit breaker combined floodgate or separating brake, operating part (1) or operating device or contact pivot (6) drive divide-shut brake indicator (15), make divide-shut brake indicator face (15-2) correspond with instruction window (19), instruct the divide-shut brake state.

4. The circuit breaker of claim 3, wherein: when the circuit breaker is switched on or switched off, the lever (3) rotates to drive the switching-on and switching-off indicating piece (15), so that a switching-on indicating area or a switching-off indicating area of a switching-on and switching-off indicating piece surface (15-2) corresponds to the indicating window (19), when the circuit breaker is switched on or switched off, the lever (3) rotates to be separated from the switching-on and switching-off indicating piece (15), the first elastic piece drives the switching-on and switching-off indicating piece (15) to reset, and the switching-off indicating area or the switching-on indicating area corresponding to the switching-on indicating piece surface (15-2) corresponds to the indicating window (19).

5. The circuit breaker of claim 3, wherein: the rotating axes of the opening and closing indicating piece (15) and the alarming indicating piece (14) are concentrically arranged.

6. The circuit breaker of claim 5, wherein: the first elastic piece and the second elastic piece are the same elastic piece.

7. The circuit breaker of claim 6, wherein: a first pivot part is arranged in the middle of the opening and closing indicating piece (15), one end of the first pivot part is a first swing arm (15-1), the other end of the first pivot part is a first indicating arm, and the end part of the first indicating arm is provided with an arc opening and closing indicating piece surface (15-2); the middle part of the alarm indicating piece (14) is provided with a second pivot part, one end of the alarm indicating piece is provided with a second swing arm (14-3), the other end of the alarm indicating piece is provided with a second indicating arm, the end part of the second indicating arm is provided with an arc-shaped alarm indicating surface (14-2), and the same elastic piece used as the first elastic piece and the second elastic piece is an indicating spring (22) and is arranged between the first pivot part and the second pivot part.

8. The circuit breaker of claim 7, wherein: one of the first pivoting part and the second pivoting part is provided with a spring assembly groove (15-3), the other one of the first pivoting part and the second pivoting part is provided with a spring assembly boss, the spring assembly groove and the spring assembly boss are respectively provided with a pivoting hole for a rotating shaft to penetrate through, the indication spring (22) is sleeved on the spring assembly boss, the spring assembly boss is correspondingly assembled in the spring assembly groove, and an elastic arm of the indication spring (22) acts on the opening and closing indicating member (15) and the alarm indicating member (14) respectively.

9. The circuit breaker of claim 7, wherein: and a switching-on indicating area and a switching-off indicating area are arranged on the switching-on and switching-off indicating part surface (15-2), the switching-on indicating area and the switching-off indicating area are arranged in height to form a step structure, and the alarm indicating surface (14-2) can rotate to shield the switching-on indicating area or the switching-off indicating area at the lower part of the step structure and is limited with the side wall of the step structure.

10. The circuit breaker according to any one of claims 1-9, wherein: the indicating device further comprises a swing rod (16), a sliding block (17), a first return spring (16-1) and a second return spring (17-1), the swing rod (16) is rotatably arranged in the shell, the first return spring (16-1) acts on the swing rod (16), the sliding block (17) is slidably arranged in the shell, and the second return spring (17-1) acts on the sliding block (17); when the circuit breaker is switched on, the operating piece (1), the operating mechanism or the moving contact assembly can drive the sliding block (17) to move, the sliding block (17) drives the alarm indicating piece (14) to be far away from the indicating window (19), the sliding block (17) is limited with the swinging rod (16), when the circuit breaker is tripped and switched off, the tripping piece (5) and the locking piece (4) are in hasp fit, the tripping piece (5) or the locking piece (4) pushes the swinging rod (16) to move, the swinging rod (16) is relieved from being limited with the sliding block (17), the second reset spring (17-1) drives the sliding block (17) to move to avoid the alarm indicating piece (14), and the second elastic piece drives the alarm indicating piece (14) to correspond to the indicating window (19).

11. The circuit breaker of claim 10, wherein: the slider (17) comprises a slider main body and a trigger arm which are arranged in a T shape, the slider main body is linearly and slidably arranged in the shell, one end of the slider main body is used as a first driving part matched with a second reset spring (17-1), the other end of the slider main body is used as a first limiting part (17-2) in limiting fit with the swing rod (16), the trigger arm is connected with the middle part of the slider main body, the alarm contact (18-2) is arranged on one side of the trigger arm along the sliding direction of the slider (17), one side edge of the trigger arm is used as a first trigger part (17-3) for driving the alarm indicating part (14), and the other side edge of the trigger arm is used as a second driving part.

12. The circuit breaker of claim 10, wherein: the swing rod (16) is provided with a second limiting part (16-2) in limiting fit with the sliding block (17), a second triggering part (16-3) in matching with the locking part (4) or the jump buckle part (5) and a first driving part in matching with the first reset spring (16-1), the swing rod (16) is respectively provided with a first swing arm and a second swing arm in a protruding mode, the end part of the first swing arm serves as the second limiting part (16-2), the second swing arm is provided with a limiting structure serving as the first driving part in matching with the first reset spring (16-1), and one side edge of the second swing arm serves as the second triggering part (16-3).

13. The circuit breaker of claim 10, wherein: jump buckle piece (5) protruding be equipped with hasp piece (4) hasp complex jump buckle collude (5-2), one side that hasp piece (4) is close to jump buckle piece (5) is equipped with the breach and forms hasp platform (4-5), hasp elastic component (4-2) drive hasp piece (4) rotate to the direction that is close to jump buckle piece (5) and make hasp platform (4-5) and jump buckle collude (5-2) hasp cooperation, jump buckle piece (5) remove with the hasp cooperation of hasp piece (4) after, jump buckle piece (5) promote hasp piece (4) promote the motion of pendulum rod (16-3) with higher speed.

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