CN112768306A - Fixing and unlocking mechanism and circuit breaker - Google Patents

Abstract

The application provides a fixing and unlocking mechanism and a circuit breaker, and relates to the technical field of low-voltage apparatuses. The fixing and unlocking mechanism comprises a shell, a transmission part, a lock catch part and an unlocking part, wherein the lock catch part is rotationally connected with the shell, and a locking block is arranged on the lock catch part; the unlocking piece is rotatably connected with the shell. Under the breaker state of closing, the locking piece is arranged in the spacing hole of inserting rack board in order to inject the position of hasp piece. The driving medium can rotate and drive the relative casing of deblocking piece and rotate around self axis under the exogenic action for deblocking piece drives the relative casing of hasp piece and rotates, so that the locking piece breaks away from spacing hole, and the driving medium can make the circuit breaker be in the separating brake state around self axis rotation. This fixed and release mechanism can use in the circuit breaker to make the circuit breaker just can extract from the rack under the separating brake state, extract under the separating brake state and can not produce electric arc, therefore can improve the operational safety nature of this circuit breaker.

Description

Fixing and unlocking mechanism and circuit breaker

Technical Field

The invention relates to the technical field of low-voltage electric appliances, in particular to a fixing and unlocking mechanism and a circuit breaker.

Background

With the wide use of the plug-in circuit breaker in various electrical apparatuses, the structure of the plug-in circuit breaker has been developed to meet the installation requirements of various electrical apparatuses.

When the existing traditional plug-in circuit breaker product is in an installation position, when the circuit breaker is pulled out of a cabinet after a wire is connected and the circuit breaker is closed, a small electric arc can be generated between a terminal of the circuit breaker and a bus bar, and the safety of nearby equipment can be endangered.

Disclosure of Invention

The object of the present invention includes, for example, providing a fixing and unlocking mechanism and a circuit breaker, which can ensure that the circuit breaker can only be pulled out of a cabinet in an opening state, so that an arc can be prevented from being generated between a terminal of the circuit breaker and a bus bar, thereby improving the safety of the circuit breaker.

Embodiments of the invention may be implemented as follows:

in a first aspect, an embodiment of the present invention provides a fixing and unlocking mechanism, which is applied to a circuit breaker, and includes a housing, a transmission member, a locking member and an unlocking member, wherein the locking member is rotatably connected to the housing, and a locking block is disposed on the locking member; the unlocking piece is rotationally connected with the shell;

in a closing state of the circuit breaker, the locking block is used for being inserted into a limiting hole of a cabinet plate so as to limit the position of the locking piece;

the driving medium can rotate so that the circuit breaker is in the separating brake state around self axis under the exogenic action, and the driving medium can drive when rotating around self axis the unlocking piece is relative the casing rotates, makes the unlocking piece drive the hasp piece is relative the casing rotates, so that the locking piece breaks away from spacing hole.

In an alternative embodiment, the latch member includes a first end and a second end disposed opposite to each other, the first end is hinged to the housing, and the locking block is disposed between the first end and the second end. The second end is equipped with butt portion, the unblock piece can drive butt portion is relative the casing rotates.

In an optional embodiment, the locking device further comprises an elastic piece, wherein the elastic piece is abutted against the locking piece, and the elastic piece is positioned on one side of the locking piece, which is far away from the locking block.

In an optional implementation manner, the unlocking piece comprises a body, and a first shifting block and a second shifting block which are arranged on the body, and the transmission piece can rotate around the axis of the transmission piece under the action of external force and drive the first shifting block to rotate relative to the shell, so that the second shifting block drives the locking piece to rotate relative to the shell.

In an alternative embodiment, the first and second blocks are disposed at an angle.

In an optional embodiment, the housing is provided with a first rotating shaft, the body is provided with a central through hole, and the body is sleeved on the first rotating shaft through the central through hole.

In an optional embodiment, the transmission part comprises a transmission gear, a boss is arranged on the transmission gear, and the boss can drive the unlocking part to rotate relative to the shell.

In an alternative embodiment, the outer circumferential surface of the boss is provided with a driving surface, the driving surface comprises at least one concave surface, and the driving surface can drive the unlocking piece to rotate relative to the shell.

In an optional embodiment, the device further comprises a driving member, wherein the driving member is in transmission connection with the transmission member and drives the transmission member to rotate.

In a second aspect, an embodiment of the present invention provides a circuit breaker, including a switching-off assembly and the fixing and unlocking mechanism of any one of the foregoing embodiments, where the switching-off assembly is in transmission connection with the transmission member.

The beneficial effects of the embodiment of the invention include, for example:

the fixing and unlocking mechanism provided by the invention can be applied to a circuit breaker, and by arranging the locking piece, the unlocking piece and the transmission piece, only when the transmission piece rotates around the axis of the transmission piece under the action of external force, the transmission piece can drive the unlocking piece to rotate relative to the shell, and the unlocking piece can drive the locking piece to rotate relative to the shell, so that a locking block of the locking piece is separated from a limiting hole, meanwhile, the circuit breaker can be in a brake-off state due to the rotation of the transmission piece, and the circuit breaker is ensured to be in a brake-off state when being pulled out from a cabinet, so that electric arcs can be prevented from being generated between a wiring terminal of the circuit breaker and a busbar, and the safety of operating personnel.

The circuit breaker provided by the invention comprises a brake separating assembly and the fixing and unlocking mechanism, wherein the brake separating assembly is in transmission connection with the transmission piece, and when the transmission piece rotates around the axis of the transmission piece under the action of external force, the locking piece of the locking piece can be separated from the limiting hole through the unlocking piece, and the brake separating assembly can be driven to act, so that the circuit breaker is in a brake separating state, and the circuit breaker is ensured to be in the brake separating state when being pulled out of a cabinet, and the safety is favorably improved.

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 schematic diagram of a first view of a circuit breaker according to an embodiment of the present invention;

fig. 2 is a simplified structural diagram of a second perspective of a circuit breaker according to an embodiment of the present invention;

fig. 3 is a schematic view of an application scenario of a locked state at a first viewing angle of a fixing and unlocking mechanism of a circuit breaker according to an embodiment of the present invention;

fig. 4 is a schematic view of an unlocking state application scenario of a fixing and unlocking mechanism of a circuit breaker according to a first viewing angle according to an embodiment of the present invention;

fig. 5 is a first view of the locking member of the fixing and unlocking mechanism according to the embodiment of the present invention;

fig. 6 is a second perspective structural view of the locking element of the fixing and unlocking mechanism according to the embodiment of the present invention;

FIG. 7 is a schematic view of an unlocking member of the securing and unlocking mechanism according to an embodiment of the present invention;

fig. 8 is a schematic view of an installation structure of the elastic member of the fixing and unlocking mechanism according to the embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a transmission member of the locking and unlocking mechanism according to an embodiment of the present invention;

FIG. 10 is a schematic structural view of a locking and unlocking mechanism according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of the fixing and unlocking mechanism in an unlocked state according to the embodiment of the present invention.

Icon: 10-a circuit breaker; 20-a brake separating component; 30-a cabinet plate; 31-a limiting hole; 110-a housing; 120-a transmission member; 121-a transmission gear; 123-boss; 1231-tooth portion; 125-a drive face; 126-concave surface; 127-a holding surface; 128-rotating the central hole; 130-a catch member; 131-a locking block; 132-a first end; 133-a second end; 134-fixed axle; 135-an abutment; 1351-lead bevel; 1301-upper surface; 1303-lower surface; 1305-a stop surface; 140-unlocking the member; 141-a body; 143-a first paddle; 145-a second paddle; 146-a central through hole; 150-a drive member; 160-an elastic member; 161-a second torque arm; 163-first torque arm; 165-a second shaft; 170-reducer.

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 invention, as claimed, but is merely representative of selected embodiments of the invention. 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 if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to 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 appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Referring to fig. 1 and fig. 2, the present embodiment provides a circuit breaker 10, the circuit breaker 10 includes a fixing and unlocking mechanism and a tripping assembly 20, and the circuit breaker 10 is a plug-in circuit breaker 10 and can be installed in a cabinet. The circuit breaker 10 is characterized in that when the circuit breaker 10 is in a closing state, the fixing and unlocking mechanism is in a locking state; when the circuit breaker 10 is in the opening state, the fixing and unlocking mechanism is in the unlocking state. Only when circuit breaker 10 is in the separating brake state, just can be when pulling out circuit breaker 10 from the rack, just so can avoid producing electric arc between wiring end and the busbar of circuit breaker 10 to eliminate the potential safety hazard, improve the security of operating personnel and circuit breaker 10 and near equipment greatly.

The fixing and unlocking mechanism comprises a shell 110, a transmission piece 120, a locking piece 130, an unlocking piece 140, a driving piece 150 and an elastic piece 160, wherein the locking piece 130 is rotatably connected with the shell 110, a locking block 131 is arranged on the locking piece 130, and the unlocking piece 140 is rotatably connected with the shell 110. The cabinet includes a cabinet panel 30, and the circuit breaker 10 is connected to the cabinet panel 30. Further, a limiting hole 31 (see fig. 4) is formed in the cabinet plate 30, and a mounting through hole is formed in a position of the housing 110 corresponding to the limiting hole 31 and is communicated with the limiting hole 31. When the circuit breaker 10 is in a closed state, the locking block 131 passes through the mounting through hole of the housing 110 and is inserted into the limiting hole 31 of the cabinet plate 30 to limit the position of the locking piece 130, so that the locking piece 130 of the circuit breaker 10 is in a locked state, in which the circuit breaker 10 cannot be pulled out of the cabinet, as shown in fig. 3.

The transmission member 120 can rotate around its axis under the external force to enable the circuit breaker 10 to be in the opening state, and the transmission member 120 can drive the unlocking member 140 to rotate relative to the housing 110 while rotating around its axis, so that the unlocking member 140 drives the locking member 130 to rotate relative to the housing 110, and the locking block 131 is separated from the limiting hole 31. In this open state, the circuit breaker 10 can be pulled out of the cabinet as shown in fig. 4. Because the circuit breaker 10 can only be pulled out from the cabinet when being in the unlocking state and the opening state at the same time, the generation of electric arcs between the wiring terminal of the circuit breaker 10 and the bus bar is avoided, and the safety performance is greatly improved.

Alternatively, as shown in fig. 5 and 6, the locking member 130 includes a first end 132 and a second end 133 that are oppositely disposed, the first end 132 is hinged to the housing 110, and the locking block 131 is disposed between the first end 132 and the second end 133. For convenience of description, the side of latch member 130 close to cabinet panel 30 is defined as upper surface 1301 of latch member 130, and the side of latch member 130 away from cabinet panel 30 is defined as lower surface 1303 of latch member 130. The locking block 131 is protruded on the upper surface 1301 of the locking member 130 so as to be inserted into the limiting hole 31 of the cabinet plate 30 to realize locking. In this embodiment, the housing 110 is provided with an arc groove (not shown), the fixed shaft 134 is installed in the arc groove, and the fixed shaft 134 is cylindrical; the first end 132 is disposed on the fixed shaft 134, so that the locking element 130 can rotate around the fixed shaft 134 relative to the housing 110. Of course, in other alternative embodiments, the shape of the fixed shaft 134, the installation manner of the fixed shaft 134, and the like may be flexibly adjusted, and the shape of the arc groove on the housing 110 may be adaptively changed. For example, two connection holes are formed in the housing 110, the fixed shaft 134 is fixedly connected to the first end 132, and two ends of the fixed shaft 134 are respectively disposed in the two connection holes, so that the locking element 130 can rotate relative to the housing 110, which is not illustrated here.

Further, the second end 133 is provided with an abutting portion 135, and the unlocking member 140 can apply a force to the abutting portion 135 away from the cabinet plate 30 to drive the abutting portion 135 to rotate relative to the housing 110. The abutting portion 135 extends along the direction in which the second end 133 is far away from the first end 132, in this embodiment, the ends of the abutting portion 135 and the second end 133 are stepped, a guiding inclined surface 1351 is disposed on a side of the abutting portion 135 close to the upper surface 1301, and the guiding inclined surface 1351 extends from the end surface of the second end 133 and inclines toward the direction close to the lower surface 1303 of the locking element 130. The inclined guide surface 1351 is used for contacting with the unlocking part 140, so that the unlocking part 140 and the inclined guide surface 1351 can have a larger contact area during the rotation of the unlocking part 140, and the force application effect of the unlocking part 140 on the abutting part 135 is better.

Referring to fig. 7, the unlocking unit 140 includes a body 141, and a first shifting block 143 and a second shifting block 145 disposed on the body 141, and the transmission member 120 can rotate around its axis under an external force and drive the first shifting block 143 to rotate relative to the housing 110, so that the second shifting block 145 drives the locking element 130 to rotate relative to the housing 110 in a direction away from the cabinet panel 30. In this embodiment, the first dial 143 and the second dial 145 are disposed at an angle, and optionally, the angle formed between the first dial 143 and the second dial 145 is about 40 degrees to 80 degrees. Of course, other angle values may be set according to practical situations, and are not limited specifically herein. The first shifting block 143, the second shifting block 145 and the body 141 may be integrally formed or may be fixedly connected in a separated manner.

Further, a first rotating shaft (not shown) is disposed on the housing 110, a central through hole 146 is disposed on the body 141, the body 141 is sleeved on the first rotating shaft through the central through hole 146, and the unlocking member 140 can rotate around the first rotating shaft. When the first shifting block 143 rotates, the second shifting block 145 also rotates. In this embodiment, as shown in fig. 3, if the transmission member 120 rotates to drive the first shifting block 143 to rotate clockwise around the first rotation axis, the second shifting block 145 rotates clockwise, the second shifting block 145 applies a pressure to the abutting portion 135 away from the cabinet plate 30 to drive the abutting portion 135 to rotate counterclockwise around the fixing shaft 134, so that the locking block 131 can be disengaged from the limiting hole 31 of the cabinet plate 30, and the locking fastener 130 is in an unlocking state, as shown in fig. 4.

The elastic member 160 is disposed on the lower surface 1303 of the locking member 130, i.e., the side of the locking member 130 away from the cabinet panel 30, and the elastic member 160 is always abutted against the locking member 130 to apply an elastic force to the locking member 130 toward the cabinet panel 30. When the locking member 130 is switched from the locking state to the unlocking state, the unlocking member 140 drives the abutting portion 135 to move in a direction away from the cabinet plate 30, and the unlocking member 140 overcomes the elastic force of the elastic member 160 to work, so that the locking block 131 is separated from the limiting hole 31. When the locking member 130 is switched from the unlocked state to the locked state, the locking member 130 rotates in a direction approaching the cabinet plate 30 under the elastic restoring force of the elastic member 160, so that the locking block 131 is inserted into the limiting hole 31.

Referring to fig. 8, in the present embodiment, the elastic member 160 is a torsion spring, the housing 110 is fixed with a second rotating shaft 165, the torsion spring is sleeved on the second rotating shaft 165, and the torsion spring includes a first torsion arm 163 and a second torsion arm 161. First torsion arm 163 abuts against stop surface 1305 of catch member 130 and second torsion arm 161 abuts against transmission member 120. Of course, not limited thereto, in other alternative embodiments, second torque arm 161 may be fixed in other positions, such as on housing 110; the elastic member 160 may also be an elastic sheet, an elastic rope, a compression spring, or other elastic elements, as long as the elastic member 160 abuts against the locking member 130, and when the locking member 130 is switched from the locking state to the unlocking state, the unlocking member 140 overcomes the elastic force of the elastic member 160 to do work, so that the elastic member 160 stores elastic potential energy; when the locking member 130 is switched from the unlocked state to the locked state, the locking member 130 can move toward the side close to the cabinet plate 30 by the elastic restoring force, thereby achieving locking. The shape, structure, and installation manner of the elastic member 160 are flexible and not limited herein.

Referring to fig. 9, in the present embodiment, the transmission member 120 includes a transmission gear 121, and the transmission gear 121 is a half-tooth gear, that is, only a portion of the circumferential surface of the transmission gear 121 is provided with teeth that can be engaged. The transmission gear 121 is provided with a boss 123 along the axial direction, the boss 123 is consistent with the rotation center of the transmission gear 121, the first shifting block 143 of the unlocking piece 140 is abutted against the boss 123, and the boss 123 rotates to drive the unlocking piece 140 to rotate relative to the shell 110. In this embodiment, the second torque arm 161 of the elastic member 160 abuts against the boss 123, and the boss 123 fixes and limits the second torque arm 161.

Further, the outer circumferential surface of the boss 123 includes a driving surface 125 and a holding surface 127 which are connected to each other, wherein when the first block 143 of the unlocking member 140 contacts the driving surface 125, the boss 123 rotates to rotate the unlocking member 140 relative to the housing 110. Optionally, the driving surface 125 includes at least one concave surface 126, the concave surface 126 can ensure that the boss 123 applies a reliable steering force to the first shifting block 143, and optionally, a third rotating shaft (not shown) is disposed on the housing 110, the transmission gear 121 is provided with a rotating central hole 128, the transmission gear 121 is sleeved on the third rotating shaft through the rotating central hole 128 and can rotate around the third rotating shaft, and the third rotating shaft is located on a self axis of the transmission gear 121. The boss 123 and the transmission gear 121 may be integrally formed or may be fixedly connected in a separated manner. When the transmission gear 121 rotates, the boss 123 rotates along with the transmission gear, and the holding surface 127 of the boss 123 is an arc surface and concentric with the transmission gear 121. When the first shifting block 143 abuts against the retaining surface 127, the boss 123 rotates to not drive the first shifting block 143 to rotate, and the retaining surface 127 only has a limiting effect on the first shifting block 143. The distance between the driving surface 125 of the boss 123 and the rotation center is varied during the rotation of the transmission gear 121, so that when the first block 143 of the unlocking member 140 contacts the driving surface 125, the boss 123 can drive the first block 143 to rotate relative to the housing 110 during the rotation. The driving surface 125 in this embodiment shows only one concave surface 126, and in other alternative embodiments, the number of concave surfaces 126 may be two, three or more, and is not limited herein.

In this embodiment, the retaining surface 127 is provided with a plurality of tooth portions 1231, the tooth portions 1231 are used for being in transmission connection with gears in the opening unit, and when the transmission gear 121 rotates along the first direction, the tooth portions 1231 of the bosses 123 can drive the opening assembly 20 to move, so that the opening assembly 20 is in a disconnected state, that is, an opening state; when the transmission gear 121 rotates in the second direction, the tooth 1231 of the boss 123 can drive the opening assembly 20 to move, so that the opening assembly 20 is in a conducting state, i.e., a closing state.

Referring to fig. 10, when the locking element 130 is in the locked state, the first shifting block 143 abuts against the driving surface 125 of the boss 123, and when the position shown in fig. 10 is reached, the boss 123 rotates clockwise, the first shifting block 143 abuts against the concave surface 126, and the driving surface 125 drives the first shifting block 143 to rotate counterclockwise, so that the second shifting block 145 applies a force to the abutting portion 135 in a direction away from the cabinet plate 30, so that the locking element 130 rotates around the fixing shaft 134 in a direction away from the cabinet plate 30, and the locking block 131 disengages from the limiting hole 31 of the cabinet plate 30, thereby unlocking the locking element 130. During the rotation of the locking member 130 around the fixing shaft 134 in the direction away from the cabinet panel 30, the first torsion arm 163 of the torsion spring is pressed downward, the first torsion arm 163 is overcome, and the second torsion arm 161 of the torsion spring is abutted against and fixed to the outer peripheral surface of the boss 123.

Referring to fig. 11, when the locking element 130 is in the unlocking state, the first shifting block 143 abuts against the retaining surface 127 of the boss 123, when the boss 123 rotates in the reverse direction, that is, in the counterclockwise direction, the first shifting block 143 abuts against the concave surface 126, the driving surface 125 drives the first shifting block 143 to rotate in the clockwise direction, so that the force applied by the second shifting block 145 to the abutting portion 135 disappears, the locking element 130 rotates around the fixed shaft 134 in the direction close to the cabinet plate 30 under the elastic restoring force of the torsion spring, and the locking block 131 is locked in the limiting hole 31 of the cabinet plate 30, thereby locking the locking element 130. The second torsion arm 161 of the torsion spring is always fixed in contact with the outer peripheral surface of the boss 123, and the second torsion arm 161 shown in the drawings of the present embodiment is in contact with the holding surface 127 in both the locked state and the unlocked state. In other alternative embodiments, second torque arm 161 may also abut against driving surface 125, and is not limited in particular.

It is easy to understand that the driving member 120 rotates around its own axis under the action of external force, which may be manually applied or electrically driven, and is not limited in particular herein. In this embodiment, the external force applied to the transmission member 120 is provided by the driving member 150. The driving member 150 is in transmission connection with the transmission member 120, and provides a driving force for the transmission member 120 to drive the transmission member 120 to rotate. Optionally, the driving member 150 is a driving motor, the driving motor is in transmission connection with the speed reducer 170, and the speed reducer 170 is in transmission connection with the transmission gear 121 to drive the transmission gear 121 to rotate.

The fixing and unlocking mechanism and the circuit breaker 10 provided by the embodiment have the following working principles:

when the circuit breaker 10 is mounted on the cabinet panel 30, the circuit breaker 10 is in a closed state. The fixing and unlocking mechanism of the circuit breaker 10 is in a locked state, and the locking block 131 is located in the limiting hole 31 of the cabinet plate 30. If the circuit breaker 10 needs to be pulled out from the cabinet, the driving motor rotates in the first direction, that is, rotates in the forward direction, the driving force of the driving motor is transmitted to the transmission gear 121 through the reducer 170, so as to drive the transmission gear 121 to rotate in the forward direction around the third rotating shaft (the viewing angle shown in fig. 3 is counterclockwise rotation, and the viewing angle shown in fig. 10 is clockwise rotation), during the rotation of the transmission gear 121, the driving surface 125 of the boss 123 pushes the first shifting block 143 of the unlocking piece 140 to rotate around the first rotating shaft, so that the second shifting block 145 drives the abutting portion 135 of the locking piece 130 to rotate around the fixed shaft 134 and in the direction away from the cabinet plate 30, so that the locking block 131 is away from the cabinet plate 30, and is disengaged from the limiting hole 31 of the cabinet plate 30. Meanwhile, in the process that the transmission gear 121 rotates around the third rotating shaft in the forward direction, the tooth 1231 on the holding surface 127 of the boss 123 is engaged with a gear in the opening assembly 20 to drive the opening assembly 20 to move, so that the opening assembly 20 is in a disconnected state, that is, the circuit breaker 10 is in an opening state. At this moment, can pull out circuit breaker 10 from the rack, because circuit breaker 10 is in the breaking state promptly the outage state when pulling out, just so can avoid producing electric arc between the wiring end of circuit breaker 10 and the busbar to improve the security of circuit breaker 10 and near equipment, also greatly ensured operating personnel's personal safety simultaneously.

Similarly, if the circuit breaker 10 needs to be installed in the cabinet plate 30, the driving motor rotates in the second direction, i.e. rotates reversely, the driving force of the driving motor is transmitted to the transmission gear 121 through the reducer 170, and drives the transmission gear 121 to rotate reversely around the third rotation axis (clockwise rotation in the view angle shown in fig. 4 and counterclockwise rotation in the view angle shown in fig. 11), during the rotation of the transmission gear 121, the driving surface 125 of the boss 123 pushes the first shifting block 143 of the unlocking member 140 to rotate around the first rotation axis, so that the second shifting block 145 rotates around the first rotation axis and in the direction close to the cabinet plate 30, at this time, the pressure of the second shifting block 145 on the abutting portion 135 disappears, the abutting portion 135 rotates around the fixed axis 134 and in the direction close to the cabinet plate 30 under the elastic restoring force of the elastic member 160, so that the locking block 131 also moves in the direction close to the cabinet plate 30 until the locking block 131 is inserted into the position-limiting hole 31 of the cabinet plate 30, catch member 130 is in a locked condition. Meanwhile, in the process that the transmission gear 121 reversely rotates around the third rotating shaft, the tooth 1231 on the holding surface 127 of the boss 123 is engaged with a gear in the opening assembly 20 to drive the opening assembly 20 to move, so that the opening assembly 20 is in a conducting state, that is, the circuit breaker 10 is in a closing state.

In summary, the fixing and unlocking mechanism and the circuit breaker 10 provided by the embodiment at least have the following beneficial effects:

the transmission member 120 rotates around its own axis under the action of external force, i.e., rotates around the third rotating shaft, and can drive the unlocking member 140 to rotate, so that the locking member 130 is in an unlocking state; meanwhile, the transmission member 120 can drive the opening assembly 20 to move, so that the circuit breaker 10 is in an opening state. Thus, when the circuit breaker 10 is pulled out from the cabinet, the circuit breaker 10 can be ensured to be in a switching-off state, electric arcs can not be generated, and the safety of the circuit breaker 10 and nearby equipment is improved. Secondly, when the circuit breaker 10 is mounted on the cabinet plate 30, the opening assembly 20 can be in a conducting state, that is, the circuit breaker 10 is in a closing state, only by rotating the transmission member 120 in a reverse direction. Meanwhile, the driving member 120 drives the unlocking member 140 to rotate reversely, so that the locking member 130 is in a locked state under the elastic restoring force of the elastic member 160, and the locking block 131 is engaged in the limiting hole 31 of the cabinet plate 30. The circuit breaker 10 is simple and compact in structure, ingenious in design, convenient to operate and high in safety performance.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A fixing and unlocking mechanism is characterized by being applied to a circuit breaker and comprising a shell, a transmission piece, a locking piece and an unlocking piece, wherein the locking piece is rotationally connected with the shell, and a locking block is arranged on the locking piece; the unlocking piece is rotationally connected with the shell;

in a closing state of the circuit breaker, the locking block is used for being inserted into a limiting hole of a cabinet plate so as to limit the position of the locking piece;

the driving medium can rotate so that the circuit breaker is in the separating brake state around self axis under the exogenic action, and the driving medium can drive when rotating around self axis the unlocking piece is relative the casing rotates, makes the unlocking piece drive the hasp piece is relative the casing rotates, so that the locking piece breaks away from spacing hole.

2. The securing and unlocking mechanism according to claim 1 wherein said latch member includes first and second oppositely disposed ends, said first end being hingedly connected to said housing, said lock block being disposed between said first and second ends; the second end is equipped with butt portion, the unblock piece can drive butt portion is relative the casing rotates.

3. The securing and unlocking mechanism according to claim 1, further comprising a resilient member abutting against the locking member, the resilient member being located on a side of the locking member remote from the locking block.

4. The securing and unlocking mechanism as claimed in claim 1, wherein the unlocking member includes a body, and a first shifting block and a second shifting block disposed on the body, and the transmission member is capable of rotating around its axis under an external force and driving the first shifting block to rotate relative to the housing, so that the second shifting block drives the locking member to rotate relative to the housing.

5. The securing and unlocking mechanism according to claim 4, wherein the first block and the second block are disposed at an angle.

6. The fixing and unlocking mechanism according to claim 4, wherein a first rotating shaft is provided on said housing, a central through hole is provided on said body, and said body is fitted over said first rotating shaft through said central through hole.

7. The securing and unlocking mechanism of claim 1 wherein said drive member includes a drive gear, said drive gear having a boss thereon, said boss being capable of driving said unlocking member to rotate relative to said housing.

8. The securing and unlocking mechanism of claim 7 wherein the boss has a drive surface on an outer peripheral surface thereof, the drive surface including at least one concave surface, the drive surface being capable of driving the unlocking member to rotate relative to the housing.

9. The lock and unlock mechanism of claim 1 further comprising a driving member, wherein the driving member is drivingly connected to the transmission member for rotating the transmission member.

10. A circuit breaker comprising a switching-off assembly and a securing and unlocking mechanism as claimed in any one of claims 1 to 9, said switching-off assembly being drivingly connected to said drive member.

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