CN215527623U - Circuit breaker - Google Patents

Abstract

The utility model discloses a circuit breaker, and relates to the technical field of low-voltage apparatuses. The circuit breaker comprises a shell, a driving piece, a locking piece and an unlocking piece, wherein the driving piece, the locking piece and the unlocking piece are arranged on the shell; the shell is provided with a through hole, the driving piece is in driving connection with the unlocking piece, the locking piece and the unlocking piece are in driving connection and are respectively in rotating connection with the shell, and the locking piece can extend out of the through hole to be clamped with the cabinet so that the circuit breaker is clamped and locked with the cabinet; the driving piece moves linearly in the shell to control the opening and closing of the breaker; the driving piece is driven to move towards the closing direction so as to drive the unlocking piece to rotate and extend out of the through hole; when the circuit breaker is in an opening state, the driving piece is driven to move towards the opening direction so as to drive the unlocking piece and drive the locking piece to rotate and retract into the shell, and the circuit breaker and the cabinet are unlocked. The structure is compact, the assembly process can be simplified, and the assembly time can be shortened.

Description

Circuit breaker

Technical Field

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

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breaker can be used for distributing electric energy, protecting a power supply circuit, a motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur.

The plug-in type miniature circuit breaker is particularly common in low-voltage electrical appliances due to the fact that the plug-in type miniature circuit breaker has the performance of being convenient to install and detach. In order to meet the installation requirements of different electrical equipment, the plug-in type miniature circuit breaker has various structures, but the plug-in type miniature circuit breaker ensures that the circuit breaker is reliably installed, convenient to disassemble and safe to use, and is provided with a locking mechanism and an unlocking mechanism.

Although the prior plug-in type small circuit breaker is provided with the locking mechanism and the unlocking mechanism, the locking mechanism has a complex structure, at least comprises a locking piece, an unlocking piece, a safety piece and the like, and the assembly is complex and time-consuming due to the plurality of parts during the assembly.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a circuit breaker which has compact structure and can simplify the assembly process and shorten the assembly time.

The embodiment of the utility model is realized by the following steps:

in one aspect of the present invention, a circuit breaker is provided, which includes a housing, and a driving member, a locking member, and an unlocking member disposed in the housing; the shell is provided with a through hole, the driving piece is in driving connection with the unlocking piece, the locking piece and the unlocking piece are in driving connection and are respectively in rotating connection with the shell, and the locking piece can extend out of the through hole to be clamped with the cabinet so that the circuit breaker is clamped and locked with the cabinet; the driving piece moves linearly in the shell to control the opening and closing of the breaker; the driving piece is driven to move towards the closing direction so as to drive the unlocking piece to rotate and extend out of the through hole; when the circuit breaker is in an opening state, the driving piece is driven to move towards the opening direction so as to drive the unlocking piece and drive the locking piece to rotate and retract into the shell, and the circuit breaker and the cabinet are unlocked.

In an optional embodiment of the utility model, the unlocking element of the circuit breaker includes a driving surface and a supporting surface, the driving element is driven to move toward the closing direction, the driving element supports the driving surface to drive the unlocking element to rotate and extend out of the through hole, and when the circuit breaker is in the closing state, the driving element supports the unlocking element through the supporting surface.

In an alternative embodiment of the utility model, a first protrusion is disposed at an end of the driving member of the circuit breaker, a second protrusion engaged with the first protrusion is disposed on the unlocking member, and the driving member is driven to move toward the opening state to drive the unlocking member to rotate and retract the locking member into the housing through the first protrusion and the second protrusion.

In an optional embodiment of the present invention, the unlocking element of the circuit breaker is provided with a first clamping portion, the locking element is provided with a second clamping portion clamped with the first clamping portion, and the first clamping portion and the second clamping portion cooperate to drive and connect the unlocking element and the locking element.

In an optional embodiment of the utility model, the circuit breaker further includes an elastic member, one end of the elastic member is connected to the locking member, and is configured to provide a first acting force to the locking member to enable the locking member to have a tendency to extend out of the housing, and the other end of the elastic member is connected to the unlocking member, and is configured to provide a second acting force to the unlocking member to enable the first clamping portion to have a tendency to be clamped with the second clamping portion.

In an optional embodiment of the present invention, the elastic member of the circuit breaker is a torsion spring, the locking member is provided with a fixed end, the center of the torsion spring is sleeved on the fixed end, one end of the torsion spring abuts against the unlocking member, and the other end of the torsion spring abuts against the housing or the locking member.

In an optional embodiment of the present invention, the elastic member of the circuit breaker is a torsion spring, the housing is provided with a fixed end, the center of the torsion spring is sleeved on the fixed end, one end of the torsion spring abuts against the unlocking member, and the other end of the torsion spring abuts against the locking member.

In an alternative embodiment of the present invention, an end portion of the locking member of the circuit breaker, which extends out of the through hole, includes a first plane, the first plane is perpendicular to a plane on which the through hole is formed, and the first plane is disposed at an end of the locking member, which is far away from the cabinet into which the circuit breaker is inserted.

In an optional embodiment of the present invention, the end of the locking member of the circuit breaker, which extends out of the through hole, further includes an inclined surface, the inclined surface is disposed at one end of the locking member, which is close to the cabinet into which the circuit breaker is inserted, and an included angle between an extending direction of the inclined surface and an inserting direction of the circuit breaker is an acute angle.

In an optional embodiment of the utility model, an end of the unlocking piece of the circuit breaker, which extends out of the through hole, includes a second plane, the second plane is perpendicular to the plane on which the through hole is formed, and the second plane is disposed at an end of the unlocking piece, which is close to the cabinet into which the circuit breaker is inserted.

In an alternative embodiment of the present invention, a handle is connected to the operating end of the driving member of the circuit breaker.

The beneficial effects of the utility model include:

the circuit breaker provided by the embodiment of the utility model comprises a shell, a driving piece, a locking piece and an unlocking piece, wherein the locking piece and the unlocking piece are arranged in the shell. Be provided with the through-hole on the casing, the locking piece rotates with the casing to be connected, the locking piece can stretch out the inner wall joint of through-hole and rack, so that when the circuit breaker inserted the assembly position of rack, the tip that the inner wall extrusion locking of circuit breaker assembly position stretched out the casing made the locking piece wholly rotate to circuit breaker casing inside, the circuit breaker assembly back that targets in place, the locking piece wholly rotates to circuit breaker casing outside, the locking piece locks with the inner wall of circuit breaker rack. The driving piece is driven and stretches out in the through-hole in order to drive the unlocking piece to rotate towards the closing direction, stretches out and ensures that the circuit breaker that this application provided can not be inserted to the rack under the closing state in the unlocking piece of through-hole to when inserting the circuit breaker into the rack, the rack inner wall extrudes the unlocking piece and rotates to casing inside, thereby the driving piece that hinders the circuit breaker is to closing direction motion, has guaranteed the power consumption safety. When the circuit breaker is in the opening position, the driving piece is driven to move towards the opening direction to drive the unlocking piece to drive the locking piece, so that the part, extending out of the through hole, of the locking piece is retracted into the shell, and the circuit breaker can be easily taken out from the cabinet assembly position. The utility model provides an unlocking piece both can drive the locking of locking piece relieving circuit breaker and rack inner wall and can play safety protection's effect again in the circuit breaker that this application provided, consequently in the circuit breaker that this application provided, unlocking piece can replace unlocking piece and safety part in the conventional circuit breaker to reduce circuit breaker internals's quantity, this circuit breaker compact structure can simplify the assembling process and shorten the assemble duration.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a circuit breaker opening state diagram provided in an embodiment of the present invention;

fig. 2 is a closing state diagram of the circuit breaker according to the embodiment of the present invention;

fig. 3 is a state diagram of a circuit breaker being removed from a cabinet according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a driving member of a circuit breaker according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an unlocking member of a circuit breaker according to an embodiment of the present invention;

fig. 6 is a second schematic structural diagram of an unlocking member of the circuit breaker according to the embodiment of the utility model;

fig. 7 is a schematic structural diagram of a circuit breaker locking member according to an embodiment of the present invention;

fig. 8 is a schematic diagram illustrating a connection of an elastic member of a circuit breaker according to an embodiment of the present invention;

fig. 9 is a second schematic view illustrating the connection of the elastic member of the circuit breaker according to the embodiment of the utility model.

Icon: 100-a housing; 200-a driver; 202-a handle; 203-a first protrusion; 300-a lock; 301-a second snap-in part; 400-unlocking the lock; 401-a second protrusion; 402-a first clip portion; 403-a driving face; 404-a holding surface; 500-an elastic member; 600-fixed end.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the utility model provides a circuit breaker which is compact in structure, and can simplify the assembly process and shorten the assembly time. Embodiments of the present application are described below with reference to the accompanying drawings.

Referring to fig. 1 and fig. 2, the present embodiment provides a circuit breaker, which includes a housing 100, and a driving member 200, a locking member 300 and an unlocking member 400 disposed in the housing 100; the shell 100 is provided with a through hole, the driving piece 200 is in driving connection with the unlocking piece 400, the locking piece 300 and the unlocking piece 400 are in driving connection and are respectively in rotating connection with the shell 100, and the locking piece 300 can extend out of the through hole to be clamped with the cabinet so as to clamp and lock the breaker and the cabinet; the driving member 200 moves linearly in the case 100 to control the opening and closing of the circuit breaker; the driving member 200 is driven to move towards the closing direction to drive the unlocking member 400 to rotate and extend out of the through hole; when the circuit breaker is in the opening state, the driving member 200 is driven to move towards the opening direction to drive the unlocking member 400 and drive the locking member 300 to rotate and retract the housing 100, so as to unlock the circuit breaker from the cabinet.

It should be noted that, as shown in fig. 1, the unlocking member 400 and the locking member 300 are provided with rotating shafts, and the housing 100 is provided with fixing holes for fixing the rotating shafts of the unlocking member 400 and the locking member 300, wherein the two fixing holes are provided at opposite ends, so as to realize the rotating connection between the unlocking member 400 and the locking member 300 and the housing 100, respectively.

When a user plugs the circuit breaker into the cabinet assembly station, as shown in fig. 3, the inner wall of the circuit breaker assembly station presses the locking member 300 to rotate the locking member 300 as a whole toward the inside of the circuit breaker housing 100. After the circuit breaker is assembled in place, as shown in fig. 1, the whole locking member 300 rotates towards the outside of the circuit breaker housing 100, and the locking member 300 is locked with the inner wall of the circuit breaker assembly site, so that the circuit breaker is firmly clamped with the inner wall of the cabinet.

It should be noted that, in an alternative embodiment of the present application, the locking member 300 itself is an elastic member, when the inner wall of the circuit breaker assembly location presses the locking member 300 to rotate the locking member 300 integrally toward the inside of the circuit breaker housing 100, the locking member 300 accumulates elastic potential energy, and when the circuit breaker is assembled in place, the locking member 300 releases its elastic potential energy, and the elastic potential energy drives the locking member 300 to rotate integrally toward the outside of the circuit breaker housing 100, so that the locking member 300 is locked with the inner wall of the circuit breaker assembly location.

When the circuit breaker is in a closing state and is locked with the inner wall of the cabinet in a clamping mode, a user needs to remove the circuit breaker from the assembly displacement of the cabinet, and firstly, the user needs to drive the driving piece 200 to move towards the direction far away from the shell 100 of the circuit breaker to enable the circuit breaker to be opened.

It should be noted that, the above-mentioned circuit breaker is in the open state, which means that the user has operated the driving member 200 to make the driving member 200 be in the open position.

When the circuit breaker is in the opening position, the user drives the driving member 200 to move in the opening direction, and at this time, the driving member 200 is connected to the unlocking member 400, and when the driving member 200 moves in the opening direction, the driving member 200 pulls the unlocking member 400 to make the unlocking member 400 drive the locking member 300 to make the part of the locking member 300 extending out of the through hole retract into the housing 100, so as to unlock the circuit breaker from the inner wall of the cabinet.

It should be noted that, when the circuit breaker is in a closed state, the circuit breaker may not be inserted into the assembly position of the cabinet, or the circuit breaker may have been assembled into the assembly position of the cabinet and clamped to the inner wall of the cabinet.

When the circuit breaker is in a closing state and the circuit breaker is not inserted into the cabinet, the driving member 200 drives the unlocking member 400 to extend out of the through hole, so that a user can be prevented from inserting the circuit breaker into an assembling position of the cabinet when the circuit breaker is in the closing state, and electric shock danger of the user is avoided.

As shown in fig. 2, when the circuit breaker is in a closed state, the unlocking member 400 abuts against the driving member 200 so that the unlocking member 400 extends out of the through hole.

When the circuit breaker is in a closed state and the circuit breaker has been inserted into the cabinet, the locking member 300 protrudes from the through hole. Avoid the user like this to remove the circuit breaker from the assembly position department of rack when the circuit breaker is in the combined floodgate state, remove the copper bar that can make circuit breaker and rack inner wall from the rack at the combined floodgate state and produce the spark, take place the power consumption danger easily.

The circuit breaker is in the opening position, and when the circuit breaker is inserted into the cabinet, the inner wall of the cabinet extrudes the unlocking member 400 to rotate toward the inside of the case 100, thereby blocking the driving member 200 of the circuit breaker from moving toward the closing direction. Therefore, when the circuit breaker is inserted, the circuit breaker is not locked with the cabinet, and the circuit breaker is in a closing state.

Therefore, the unlocking piece 400 in the circuit breaker provided by the application can drive the locking piece 300 to unlock the circuit breaker and the inner wall of the cabinet and can play a role of safety protection, and in the circuit breaker provided by the application, the unlocking piece 400 can replace the unlocking piece and the safety piece in the conventional circuit breaker, so that the number of internal parts of the circuit breaker is reduced, the circuit breaker is compact in structure, the assembly process can be simplified, and the assembly time can be shortened.

In an alternative embodiment of the present invention, the circuit breaker unlocking element 400 includes a driving surface 403 and a supporting surface 404, the driving element 200 is driven to move toward the closing direction, the driving element 200 supports the driving surface 403 to drive the unlocking element 400 to rotate and extend out of the through hole, and when the circuit breaker is in the closing state, the driving element 200 supports the unlocking element 400 through the supporting surface 404. In an alternative embodiment of the present invention, the shape of the driving surface 403 is not particularly limited as long as the unlocking member 400 is easily driven by the driving member 200 to move toward the outside of the housing 100. Illustratively, as shown in fig. 6, the driving surface 403 is a slope, and the extending direction of the slope intersects the insertion direction of the driver 200 at an acute angle. The driving surface 403 may be a circular arc surface. In an alternative embodiment of the present invention, the abutting surface 404 is preferably a horizontal surface, so that when the driving member 200 abuts against the unlocking member 400, the horizontal surface on the driving member 200 and the horizontal surface on the unlocking member 400 are in surface contact, so as to ensure the abutting reliability.

Referring to fig. 4 and 5, in an alternative embodiment of the present invention, as shown in fig. 4, the end of the circuit breaker driving member 200 is provided with a first protrusion 203. As shown in fig. 5, the unlocking member 400 is provided with a second protrusion 401 which is engaged with the first protrusion 203. When the driving member 200 is already at the opening position, the user drives the driving member 200 to move in the opening direction, the first protrusion 203 of the driving member 200 abuts against the second protrusion 401 of the locking member 300, the driving member 200 drives the unlocking member 400 to rotate, so that the unlocking member 400 drives the locking member 300 to rotate, the part of the locking member 300 extending out of the through hole is retracted into the casing 100, and the circuit breaker is unlocked from the inner wall of the cabinet. Wherein the first protrusion 203 of the driving member 200 is provided at an end of the driving member 200 close to the insertion housing 100, and the second protrusion 401 of the unlocking member 400 is provided at a lower end of the rotation shaft of the unlocking member 400.

Referring to fig. 6 and 7, in an alternative embodiment of the present invention, as shown in fig. 6, the circuit breaker unlocking member 400 is provided with a first clamping portion 402, and as shown in fig. 7, the locking member 300 is provided with a second clamping portion 301 matched with the first clamping portion 402. The first clamping portion 402 is disposed at an end far away from the unlocking member 400 and rotatably connected to the housing 100, and the second clamping portion 301 is disposed at an end far away from the locking member 300 and rotatably connected to the housing 100. When the driving member 200 drives the unlocking member 400 to rotate towards the inside of the casing 100, the first clamping portion 402 is clamped with the second clamping portion 301, so that the unlocking member 400 correspondingly drives the locking member 300 to move towards the inside of the casing 100, and the circuit breaker and the inner wall of the cabinet are unlocked.

Referring to fig. 1, in an alternative embodiment of the present invention, as shown in fig. 1, the circuit breaker further includes an elastic member 500, one end of the elastic member 500 is connected to the locking member 300 for providing a first force to the locking member 300 to make the locking member 300 have a tendency to extend out of the housing 100, and the other end of the elastic member 500 is connected to the unlocking member 400 for providing a second force to the unlocking member 400 to make the first clamping portion 402 have a tendency to be clamped with the second clamping portion 301.

One end of the elastic member 500 acts on the locking member 300 to provide a pushing force to the locking member 300, so that the locking member 300 has a tendency to protrude out of the housing 100. When the circuit breaker is inserted into the cabinet, the inner wall of the cabinet extrudes the part of the locking member 300 extending out of the shell, the elastic member 500 accumulates elastic potential energy, and after the circuit breaker and the cabinet are assembled in place, the elastic potential energy of the elastic member 500 drives the locking member 300 to rotate, so that the locking member 300 extends out of the shell 100 and is locked and clamped with the inner wall of the cabinet, and the circuit breaker is prevented from being removed from a clamping position when being inserted into the cabinet and in a closing state.

The other end of the elastic member 500 acts on the unlocking member 400 to provide a pulling force to the unlocking member 400, so that the first clamping portion 402 tends to be clamped with the second clamping portion 301. After the driving member 200 unlocks the circuit breaker from the cabinet, the unlocking member 400 is pulled by the elastic member 500 to rotate in a direction close to the locking member 300 until the locking member 300 and the unlocking member 400 maintain a balanced state, so that when a user drives the driving member 200 to close the circuit breaker, the driving member 200 can easily drive the unlocking member 400 to rotate.

It should be noted that, in the alternative embodiment provided in the present application, the elastic member 500 only needs to make the locking member 300 have a tendency to extend out of the housing 100, so that the first clamping portion 402 has a tendency to be clamped with the second clamping portion 301, and optionally, the elastic member 500 is a torsion spring, which has a compact structure and is suitable for providing an elastic force to rotatably connected components.

In an alternative embodiment of the present invention, as shown in fig. 2 and 9, the locking member 300 of the circuit breaker is provided with a fixed end 600, the fixed end 600 is sleeved at the center of a torsion spring, one end of the torsion spring abuts against the unlocking member 400, and the other end of the torsion spring abuts against the housing 100 or against the locking member 300. Wherein, the fixed end 600 is a cylindrical protrusion, and the center of the torsion spring is sleeved on the cylindrical protrusion to realize the connection of the torsion spring and the locking member 300.

As shown in fig. 2, the other end of the torsion spring abuts against the housing 100, and the center of the torsion spring pushes the locking member 300, so that the locking member 300 tends to protrude out of the housing 100.

As shown in fig. 9, an end of the torsion spring abutting against the unlocking member is located between the first clamping portion 402 and the rotating shaft of the unlocking member 400. The locking member is provided with a support boss, and the other end of the torsion spring supports against the support boss on the locking member 300, so that the other end of the torsion spring drives the locking member 300, and the locking member 300 tends to extend out of the housing 100.

In an alternative embodiment of the utility model, as shown in fig. 8, a fixing end 600 is disposed on an inner wall of the circuit breaker housing 100, a center of a torsion spring is fixedly sleeved on the fixing end 600, one end of the torsion spring abuts against the unlocking member 400, and the other end of the torsion spring abuts against the locking member 300. A boss is provided on the locking member 300, and the other end of the torsion spring abuts against the boss. Wherein, the center of the torsion spring is sleeved on the fixing end 600 to fix the center of the torsion spring on the housing 100.

In an alternative embodiment of the present invention, the end of the breaker locking member 300 protruding out of the through hole includes a first plane perpendicular to the plane of the through hole, and the first plane is disposed at an end of the locking member 300 far away from the cabinet where the breaker is inserted. This is advantageous in that the vertical plane of the protruding portion of the locking member 300 is caught on the inner wall of the cabinet when the circuit breaker is inserted into the cabinet, so that the circuit breaker is difficult to be separated from the cabinet assembly position.

In an alternative embodiment of the present invention, the end of the breaker locking member 300 protruding out of the through hole further includes an inclined surface, the inclined surface is disposed at one end of the locking member 300 close to the insertion cabinet of the breaker, and an included angle between an extending direction of the inclined surface and an insertion direction of the breaker is an acute angle. This is beneficial for inserting the circuit breaker into the cabinet, and the circuit breaker can be easily clamped into the configuration position of the cabinet along the inclined surface.

In an alternative embodiment of the present invention, the end of the circuit breaker unlocking member 400 protruding out of the through hole includes a second plane perpendicular to the plane on which the through hole is formed, and the second plane is disposed at an end of the unlocking member 400 close to the circuit breaker insertion cabinet. When the breaker is switched on and is not inserted into the cabinet, the vertical plane protruded from the unlocking piece 400 makes the breaker difficult to be inserted into the cabinet assembly position, thereby avoiding the safety accident caused by inserting the breaker into the cabinet in the switching-on state.

In an alternative embodiment of the present invention, as shown in fig. 4, a handle 202 is connected to the operation end of the circuit breaker actuator 200 for user operation. The user may push or pull the handle 202 to effect opening, closing, and unlocking of the circuit breaker from the cabinet.

The above description is only an alternative embodiment of the present invention, and is not intended to limit the present invention, and various modifications and variations of the present invention may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the utility model is not described in any way for the possible combinations in order to avoid unnecessary repetition.

Claims (10)

1. The circuit breaker is characterized by comprising a shell, a driving piece, a locking piece and an unlocking piece, wherein the driving piece, the locking piece and the unlocking piece are arranged on the shell;

the shell is provided with a through hole, the driving piece is in driving connection with the unlocking piece, the locking piece and the unlocking piece are in driving connection and are respectively in rotating connection with the shell, and the locking piece can extend out of the through hole to be clamped with the cabinet so that the circuit breaker is clamped and locked with the cabinet;

the driving piece moves linearly in the shell to control the opening and closing of the circuit breaker;

the driving piece is driven to move towards the closing direction so as to drive the unlocking piece to rotate and extend out of the through hole;

when the circuit breaker is in the separating brake state, the driving piece is driven to move towards the separating brake direction so as to drive the unlocking piece and drive the locking piece to rotate and retract the shell, and the circuit breaker and the cabinet are unlocked.

2. The circuit breaker of claim 1, wherein the unlocking member includes a driving surface and a supporting surface, the driving member is driven to move toward a closing direction, the driving member supports the driving surface to drive the unlocking member to rotate and extend out of the through hole, and when the circuit breaker is in a closing state, the driving member supports against the unlocking member through the supporting surface.

3. The circuit breaker as claimed in claim 1, wherein a first protrusion is provided at an end of the driving member, and a second protrusion engaged with the first protrusion is provided on the unlocking member, and the driving member is driven to move toward the opening state to drive the unlocking member to rotate the locking member to retract into the housing by abutting the first protrusion with the second protrusion.

4. The circuit breaker according to claim 1, wherein the unlocking member is provided with a first clamping portion, the locking member is provided with a second clamping portion, and the first clamping portion is matched with the second clamping portion to drive the unlocking member to be connected with the locking member.

5. The circuit breaker of claim 4, further comprising an elastic member, wherein one end of the elastic member is connected to the locking member, and is used for providing a first acting force to the locking member to enable the locking member to have a tendency to extend out of the housing, and the other end of the elastic member is connected to the unlocking member to provide a second acting force to the unlocking member to enable the first clamping portion to have a tendency to be clamped with the second clamping portion.

6. The circuit breaker according to claim 5, wherein the elastic member is a torsion spring, a fixed end is disposed on the locking member, the fixed end is sleeved at the center of the torsion spring, one end of the torsion spring abuts against the unlocking member, and the other end of the torsion spring abuts against the housing or the locking member.

7. The circuit breaker according to claim 5, wherein the resilient member is a torsion spring, a fixed end is disposed on the housing, the fixed end is sleeved with the center of the torsion spring, one end of the torsion spring abuts against the unlocking member, and the other end of the torsion spring abuts against the locking member.

8. The circuit breaker of claim 1, wherein the end of the locking member protruding from the through hole comprises a first plane perpendicular to the plane of the through hole, and the first plane is disposed at an end of the locking member far from the circuit breaker inserted into the cabinet.

9. The circuit breaker of claim 1, wherein the end of the locking member extending out of the through hole further comprises an inclined surface, the inclined surface is disposed at an end of the locking member near the circuit breaker inserted into the cabinet, and an included angle between an extending direction of the inclined surface and an inserting direction of the circuit breaker is an acute angle.

10. The circuit breaker of claim 1, wherein an end of the unlocking member protruding out of the through hole comprises a second plane perpendicular to a plane on which the through hole is formed, the second plane being disposed at an end of the unlocking member adjacent to the circuit breaker inserted into the cabinet.

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