CN213124351U - Mechanism assembly of plug-in circuit breaker - Google Patents

Abstract

Mechanism subassembly of plug-in circuit breaker, its characterized in that: the mechanism assembly (3) comprises an operating part (3a), the operating part (3a) is connected with a contact support part (3c) through a connecting rod (3b), the operating part (3a) can rotate in the shell (1), the operating part (3a) can drive a moving contact (202) on the contact support part (3c) to be in contact with or separated from a corresponding static contact (201) through the connecting rod (3b) in the rotating process of the shell (1) to realize the on-off of the plug-in circuit breaker, and a tripping executing mechanism (3f) is arranged on the contact support part (3 c); the existing plug-in type miniature circuit breaker mechanism module is redesigned, and the improvement of the connecting rod, the fixing buckle, the jump buckle and the lock catch structure meets the performance requirements of the plug-in type miniature circuit breaker, reduces the number of parts and the assembly difficulty of products, thereby reducing the product cost and improving the assembly reliability of the products.

Description

Mechanism assembly of plug-in circuit breaker

Technical Field

The utility model belongs to the technical field of the low pressure electricity, specifically say and relate to mechanism's subassembly of plug-in circuit breaker.

Background

The circuit breaker is divided into: there are bayonet, fixed and drawer type, the security that electrical equipment used the trade can effectively be improved in bayonet circuit breaker's use, along with the wide use of bayonet circuit breaker on various electrical equipment, in order to satisfy the installation needs of various different electrical equipment, bayonet circuit breaker's structure also develops various, in the overall arrangement of present traditional bayonet circuit breaker product when mounted position, generally adopt to press operating button, the circuit breaker is closed, the operating button of circuit breaker rebounds and resets after the operating force is got rid of, circuit breaker disconnection when pressing the button once more.

Chinese patent ZL201721400674.6 discloses a plug-in type miniature circuit breaker, which comprises a housing, a wire outlet end, a wire inlet end, a button mechanism, an operating mechanism, an overload protection mechanism, an arc extinguishing mechanism, a short circuit protection mechanism and a signal end, wherein the button mechanism is linked with a locking device and a fixed unlocking device. The plug-in type miniature circuit breaker has the advantages that the wiring can be directly plugged in, and the operation of disconnecting is simple and convenient; meanwhile, the locking mechanism is improved, so that the circuit breaker can not be switched on at will outside the cabinet, the circuit breaker can be switched on and off freely in the cabinet, the circuit breaker can not be pulled out of the cabinet through parts except the button, the circuit breaker can be easily taken out of the cabinet by pulling the button, and the safety of the installation and the use of the circuit breaker is ensured; the circuit breaker is applicable to specific narrow and small space, through arranging circuit breaker inner structure again, solves the too high difficult problem of circuit breaker local temperature rise. However, the plug-in circuit breaker has the advantages of more parts, higher product cost and complex assembly process, so that the rework rate of the assembly process is high, and the assembly efficiency of the product is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a there is part quantity more to above-mentioned current bayonet miniature circuit breaker, and the defect that assembly process is complicated provides a mechanism subassembly of plug-in circuit breaker, to current bayonet miniature circuit breaker mechanism module redesign, through connecting rod, fixed knot, jump when detaining, the improvement of hasp structure satisfies each item performance requirement of bayonet miniature circuit breaker, reduces part quantity, reduces the product assembly degree of difficulty to reduce product cost, improve the reliability of product assembly.

Technical scheme

In order to realize the technical purpose, the utility model provides a mechanism subassembly of plug-in circuit breaker, its characterized in that: the mechanism assembly comprises an operating part, the operating part is connected with a contact support part through a connecting rod, the operating part can rotate in the shell, the operating part can drive a moving contact on the contact support part to be in contact with or separated from a corresponding static contact through the connecting rod in the rotating process of the shell to realize the on-off of the plug-in circuit breaker, and a tripping executing mechanism is arranged on the contact support part;

the connecting rod with the one end that the operating parts is connected has still linked fixed knot, fixed knot dress is in can rotate in the shell, fixed knot dress is in the shell internal rotation in-process, the locking boss on the fixed knot can be followed breach on the shell stretches out or withdraws.

Furthermore, the tripping actuator comprises a jump buckle and a lock catch, the jump buckle is rotatably arranged on the contact support piece, one end of the connecting rod, which is connected with the contact support piece, is also linked with the jump buckle, the lock catch is rotatably arranged on the contact support piece, and the lock catch can lock and unlock the jump buckle, so that the movement of the connecting rod is locked and unlocked to lock and unlock the mechanism assembly.

Furthermore, when the operating element drives the contact support element to move through the connecting rod so as to drive the moving contact and the static contact to perform switching on and off operations, the fixing buckle is not linked, the operating element continues to rotate anticlockwise after being positioned at a switching off position, and the connecting rod can drive the fixing buckle to rotate anticlockwise so as to enable the locking boss to retract from the notch on the shell;

the fixing buckle is connected with a return spring, so that the fixing buckle has a clockwise rotation trend to return.

Furthermore, the outer side surface of the shell is provided with an operating part limiting boss which can limit the operating part to continue to rotate clockwise after the operating part is switched on.

Furthermore, a contact support part limiting boss is arranged in the shell and can limit the contact support part to continue to rotate anticlockwise after the contact support part is switched off.

Further, the fixing buckle is arranged in the shell and rotates coaxially with the operating piece.

Further, the operating part includes the operation body, be equipped with on the operation body and rotate centre bore one, the operation body passes through rotate centre bore one and install on the axle one in the shell and can wind an axle rotates, operation body one end is equipped with the connecting rod mounting hole, connecting rod one end is followed pass on the connecting rod mounting hole and stretch into in the fixed linkage groove of detaining, the operation body other end is the handle end, handle end atress can drive the operation body winds an axle rotates and realizes switching-off and switching-on control of switching device, handle end is last to be provided with extracts the characteristic part and is used for extracting switching device from the switch installation cabinet body.

Further, the pull out feature is a protrusion disposed on the handle end.

Further, the connecting rod mounting hole is a kidney-shaped hole.

Further, the handle torsional spring is equipped with on the operation body, the handle torsional spring dress can make in the handle torsional spring mounting groove on the operation body has the clockwise rotation trend.

Further, fixed knot is including fixed knot body, fixed knot body bottom is provided with the locking boss, the locking boss is followed fixed knot body rotates the in-process and can follow breach on the shell is stretched out or is returned, fixed knot body upper end is provided with spring mounting boss and is used for hanging dress reset spring, be equipped with the linkage groove on the fixed knot body and be used for the holding to follow the connecting rod one end that the connecting rod mounting hole passed, fixed knot body upper end is equipped with the spacing boss in position and is used for the restriction the motion stroke of connecting rod.

Furthermore, a second rotating center hole is formed in the fixing buckle body, and the fixing buckle body is installed on the second shaft in the shell through the second rotating center hole and can rotate around the second shaft.

Further, the linkage groove is a frustum-shaped linkage groove.

Furthermore, the contact supporting piece comprises a contact supporting body, a third rotating center hole is formed in the contact supporting body, the contact supporting body is installed on the third shaft in the shell through the third rotating center hole, a connecting rod groove is formed in the contact supporting body, the other end of the connecting rod penetrates through a linkage hole in the jump buckle and is installed in the connecting rod groove, a moving contact installation groove is installed in the contact supporting body, a torsion spring is installed on the contact supporting body and abuts against the moving contact, the moving contact is arranged in the moving contact installation groove, and the moving contact and the static contact can rotate relative to the contact supporting body in the moving contact installation groove under the action of the torsion spring.

Furthermore, the torsion spring is sleeved on one end of a torsion spring shaft of the contact support body and presses against the moving contact.

Furthermore, the jump buckle is rotatably arranged on a convex shaft on the contact support, the lock buckle is rotatably arranged on the contact support by utilizing the lock buckle shaft, the lock buckle comprises a linkage arm and a locking arm, a first step is arranged on the locking arm, a second step corresponding to the first step is arranged on the jump buckle, the first step and the second step are overlapped to form locking of the jump buckle, the linkage arm rotates anticlockwise under the action of external force to drive the locking arm to rotate anticlockwise to enable the first step to be far away from the second step to achieve unlocking of the jump buckle.

Furthermore, the lock catch is provided with a lock catch reset torsion spring which can enable the lock catch to have the trend of clockwise rotation reset.

Furthermore, one end of a return spring is hung on the spring mounting boss, and the other end of the return spring is hung on the spring mounting convex column on the contact support body.

Preferably, the return spring is a compression spring.

Advantageous effects

The utility model provides a pair of mechanism subassembly of plug-in circuit breaker to current plug-in miniature circuit breaker mechanism module redesign, through connecting rod, fixed knot, jump when detaining, the improvement of hasp structure satisfies plug-in miniature circuit breaker each item performance requirement, reduce part quantity, reduce the product assembly degree of difficulty to reduce product cost, improve the reliability of product assembly.

Drawings

FIG. 1 is a schematic diagram of a mechanism assembly in an open state according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of an operating member according to an embodiment of the present invention;

FIG. 3 is a schematic view of the installation structure of the handle torsion spring in the embodiment of the present invention;

FIG. 4 is a schematic structural view of a fixing buckle in the embodiment of the present invention;

fig. 5 is a schematic structural view of a contact support member according to an embodiment of the present invention;

fig. 6a is a schematic structural diagram of the lock catch in the embodiment of the present invention;

fig. 6b is a schematic structural view of the jump buckle in the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a movable contact in the embodiment of the present invention;

fig. 8 is a schematic position diagram of a limiting boss of the contact support member according to the embodiment of the present invention;

fig. 9 is a schematic diagram of a mechanism assembly in a closing state in the embodiment of the present invention;

fig. 10 is a schematic diagram of a mechanism assembly in a tripping state according to an embodiment of the present invention;

FIG. 11 is a schematic view of the mechanism assembly in the embodiment of the present invention in a pulled-out state;

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Examples

As shown in fig. 1, 9, 10, and 11, the mechanism assembly of the plug-in circuit breaker provided in this embodiment includes a housing 1, a contact system 2, and a mechanism assembly 3, where the contact system 2 includes a moving contact 202 and a fixed contact 201, the mechanism assembly 3 includes an operating element 3a, the operating element 3a is connected to a contact support 3c through a connecting rod 3b, the operating element 3a can rotate in the housing 1, and as shown in fig. 8, an operating element limiting boss 1g is provided on an outer side surface of the housing 1, and can limit the operating element 3a to rotate clockwise after being switched on. The operating piece 3a can drive the moving contact 202 on the contact support piece 3c to contact or separate from the corresponding static contact 201 through the connecting rod 3b in the rotation process of the shell 1 to realize the on-off of the plug-in circuit breaker, and the contact support piece limiting boss 1h arranged in the shell 1 can limit the continuous anticlockwise rotation of the contact support piece 3c after the opening. A tripping actuating mechanism 3f is arranged on the contact support piece 3 c;

the connecting rod 3b with the one end that operating part 3a is connected has still the linkage to detain 3d, the dress of detaining 3d is fixed can rotate in the shell 1, in this embodiment, the dress of detaining 3d is fixed in the shell 1 with the coaxial rotation of operating part 3 a. When the retaining buckle 3d is installed in the housing 1 and rotated, the locking projection 3d01 on the retaining buckle 3d can extend out of or retract back from the notch 1a on the housing 1. And a locking boss 3d01 on the fixing buckle 3d extends out from the notch 1a on the shell 1 and corresponds to a notch on the switch mounting cabinet body to realize locking mounting of the switch device.

When the operating element 3a drives the contact support 3c to move through the connecting rod 3b so as to drive the moving contact 202 and the static contact 201 to perform the opening and closing operation, the fixing buckle 3d is not linked, and the operating element 3a continues to rotate counterclockwise after being located at the opening position, and the connecting rod 3b can drive the fixing buckle 3d to rotate counterclockwise so as to enable the locking boss 3d01 to retract from the notch 1a on the housing 1;

the fixing buckle 3d is connected with a return spring 3e, so that the fixing buckle 3d has a clockwise rotation trend to return. In this embodiment, the return spring 3e is a compression spring. One end of the return spring 3e is hung on the spring mounting boss 3d0201, and the other end is hung on the spring mounting convex column 3c0105 on the contact support body 3c 01.

The tripping actuator 3f comprises a tripping 3f01 and a lock catch 3f02, the tripping 3f01 is rotatably mounted on the contact support 3c, one end of the connecting rod 3b connected with the contact support 3c is also linked with the tripping 3f01, the lock catch 3f02 is rotatably mounted on the contact support 3c, and the lock catch 3f02 can lock and unlock the tripping 3f01 so as to lock and unlock the movement of the connecting rod 3b to realize the locking and unlocking of the mechanism component 3.

More specifically, as shown in fig. 1, 2 and 3, the operating element 3a includes an operating body 3a01, the operating body 3a01 is provided with a first rotating center hole 3a0101, the operating body 3a01 is mounted on a first shaft 1b in the housing 1 through the first rotating center hole 3a0101 and can rotate around the first shaft 1b, one end of the operating body 3a01 is provided with a connecting rod mounting hole 3a0102, and in this embodiment, the connecting rod mounting hole 3a0102 is a kidney-shaped hole. One end of the connecting rod 3b penetrates through the connecting rod mounting hole 3a0102 and extends into the linkage groove 3d0202 in the fixing buckle 3d, the other end of the operating body 3a01 is a handle end 3a0103, the handle end 3a0103 is located at the operating end outside the shell 1, the handle end 3a0103 can drive the operating body 3a01 to rotate around the shaft 1b under the stress to realize the opening and closing control of the switching device, and the handle end 3a0103 is provided with a pulling-out characteristic part 3a0103a for pulling out the switching device from the switch mounting cabinet body. In this embodiment, the pull-out feature 3a0103a is a protrusion provided on the handle end 3a 0103. The operating body 3a01 is provided with a handle torsion spring 3a0104, and the handle torsion spring 3a0104 is arranged in the handle torsion spring mounting groove 3a0105 of the operating body 3a01 to enable the operating body 3a01 to have a clockwise rotation tendency.

As shown in fig. 1 and 4, the fixing buckle 3d includes a fixing buckle body 3d02, a locking boss 3d01 is disposed at the bottom of the fixing buckle body 3d02, the locking boss 3d01 can extend out of or retract into the notch 1a of the housing 1 during rotation along with the fixing buckle body 3d02, a spring mounting boss 3d0201 is disposed at the upper end of the fixing buckle body 3d02 for hanging the return spring 3e, and a linkage groove 3d0202 is disposed on the fixing buckle body 3d02 for accommodating one end of a connecting rod 3b passing through a connecting rod mounting hole 3a0102, in this embodiment, the linkage groove 3d0202 is an arc-shaped linkage groove.

The upper end of the fixing buckle body 3d02 is provided with a position limiting boss 3d0203 for limiting the motion stroke of the connecting rod 3 b. The fixing buckle body 3d02 is provided with a second rotating center hole 3d0204, and the fixing buckle body 3d02 is mounted on a second shaft 1c in the shell 1 through the second rotating center hole 3d0204 and can rotate around the second shaft 1 c. The second shaft 1c and the first shaft 1b realize that the fixing buckle 3d is arranged in the shell 1 and rotates coaxially with the operating piece 3 a.

As shown in fig. 1, 5 and 7, the contact support member 3c includes a contact support body 3c01, the contact support body 3c01 is provided with a rotation center hole tri 3c02, the contact support body 3c01 is mounted on a shaft tri 1d in the housing 1 by means of the rotation center hole tri 3c02, the contact support body 3c01 is provided with a connecting rod groove 3c0101, the other end of the connecting rod 3b passes through the linkage hole 3f0101 on the jump buckle 3f01 and is arranged in the connecting rod groove 3c0101, in the embodiment, the connecting rod groove 3c0101 is an arc-shaped groove, the contact support body 3c01 is provided with a moving contact mounting groove 3c0102, the torsion spring 3c0103 is mounted on the contact support body 3c01 to abut against the moving contact 202 shown in fig. 7, so that the moving contact 202 is disposed in the moving contact mounting groove 3c0102, and the contact end of the moving contact 202 extends out of the moving contact mounting groove 3c 0102. After the moving contact 202 and the fixed contact 201 are contacted, they can rotate in the moving contact mounting groove 3c0102 relative to the contact support body 3c01 under the action of the torsion spring 3c 0103. In this embodiment, the torsion spring 3c0103 is sleeved on the torsion spring shaft 3c0104 of the contact support body 3c01, and one end of the torsion spring shaft presses against the movable contact 202.

As shown in fig. 6a,6b and 10, the jumper 3f01 is rotatably mounted on the protruding shaft 3c03 of the contact support 3c, the latch 3f02 is rotatably mounted on the contact support 3c by using a latch shaft 3f0204, a latch reset torsion spring 3f0203 is mounted on the latch 3f02 so as to have a clockwise rotation reset tendency, and in the present embodiment, the latch reset torsion spring 3f0203 is sleeved on the latch shaft 3f 0204. As shown in fig. 6a, the lock catch 3f02 includes a linkage arm 3f0201 and a lock arm 3f0202, the lock arm 3f0202 is provided with a first step 3f0202a, as shown in fig. 6b, the jump catch 3f01 is provided with a second step 3f01a corresponding to the first step 3f0202a, the first step 3f0202a and the second step 3f01a are overlapped to form locking of the lock catch 3f02 on the jump catch 3f01, and the linkage arm 3f0201 rotates counterclockwise under an external force to drive the lock arm 3f0202 to rotate counterclockwise so that the first step 3f0202a is far away from the second step 3f01a to unlock the jump catch 3f 01.

In this embodiment, the operating element moves clockwise to move the moving contact to the closing state as shown in fig. 9, and the rotational force of the operating element is transmitted to the contact support 3c through the connecting rod 3b, so as to drive the contact 202 to close the stationary contact 201; after the moving contact 202 is contacted with the fixed contact 201, the mechanism component continues to move, at this time, the moving contact 202 does not move along with the contact support member 3c any more, but rotates around the moving contact 202 and leans against two arc edges of the contact support member 3c, and the torsion spring 3c0103 provides the contact pressure required by the moving contact 202 at this time and is used for applying a leftward force to the moving contact 202 so as to keep the balance of the forces in a closing state; as shown in fig. 1, during opening, the contact support 3c is biased by the restoring force of the return spring 3e until the contact support 3c is biased against the limit boss of the housing 1, which is the farthest point of opening of the contact system 4, and the moving contact 202 is restored to the initial position;

when the product is switched on and switched off, the switching-on and switching-off switching can be realized by utilizing the upward or downward operation of the handle end, and when the switching-on and switching-off product is switched to a state that the switch product needs to be pulled out of the switch mounting cabinet body by utilizing the operating element, the pull-out characteristic part 3a0103a at the handle end can be simultaneously used as the acting point of a hand, so that the hand applies force to pull the switch out of the switch mounting cabinet body;

as shown in the attached figures 1 and 9, when the switch is in a switching-on and switching-off state, the fixing buckle 3d is not in any matching connection with the mechanism, the operating piece 3a drives the connecting rod 3b to stay at the upper end of the linkage groove 3d0202 in the switching-off state and stay at the lower end in the switching-on state, the connecting rod 3 can move in the linkage groove 3d0202, when the fixing buckle 3d does not move, the reset spring 3e applies force to the contact support piece 3c to enable the contact support piece to move towards the switching-off direction, when the product needs to be pulled out, the operating piece 3a is shifted to the switching-off position and then applies force to enable the operating piece 3a to move anticlockwise, at the moment, the connecting rod 3b driven by the operating piece 3a stays at the upper part of the fixing buckle 3d, the connecting rod 3b can be driven to move along with the connecting piece 3b by the continuous anticlockwise movement of the operating piece, at the moment, the unlocking function of the switch cabinet body and the shell 1 is released as shown in fig. 11, at this time, the product can be pulled out by using the pull-out characteristic part 3a0103a at the handle end, once the acting force on the operating piece 3a is removed, the fixing buckle 3d can clockwise move to extend out of the notch 1a on the shell 1 under the action of the return spring 3 e;

when a switch is assembled into a switch installation cabinet body in place, a stage that a fixing buckle 3d is pressed into an outer shell 1 by a cabinet body needs to be experienced, namely when the switch is not installed in place, the upper end of a fixing buckle body 3d02 is provided with a position limiting boss 3d0203 to be matched with a connecting rod 3b, and an angle blocking transmission of a mechanism module reaches a dead point position, so that a product cannot be assembled in place and cannot be switched on, the switching-on assembly of the product can be driven to a switching-off position by the fixing buckle 3d, and only after the switch is assembled in place, a locking boss 3d01 can reach a notch position reserved in the cabinet body, so that the switch device is stretched out of the cabinet body again to lock the switch device and;

as shown in fig. 9, when the circuit breaker is in a closed state, the overlapping of the first step 3f0202a and the second step 3f01a forms a lock of the lock catch 3f02 on the trip catch 3f01, and the entire mechanism assembly 3 is reliably in the closed state, and when a short-circuit current occurs in the circuit breaker, the lock catch 3f02 receives an external driving force to rotate counterclockwise to drive the lock arm 3f0202 to rotate counterclockwise, so that the first step 3f0202a is far away from the second step 3f01a to unlock and trip the trip catch 3f01, as shown in fig. 10. After the external driving force disappears, the lock catch 3f02 will rotate clockwise to reset under the action of the lock catch reset torsion spring 3f 0203.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims (19)

1. Mechanism subassembly of plug-in circuit breaker, its characterized in that: the mechanism assembly (3) comprises an operating part (3a), the operating part (3a) is connected with a contact support part (3c) through a connecting rod (3b), the operating part (3a) can rotate in the shell (1), the operating part (3a) can drive a moving contact (202) on the contact support part (3c) to be in contact with or separated from a corresponding static contact (201) through the connecting rod (3b) in the rotating process of the shell (1) to realize the on-off of the plug-in circuit breaker, and a tripping executing mechanism (3f) is arranged on the contact support part (3 c);

connecting rod (3b) with the one end that operating parts (3a) are connected has still the linkage to be fixed detain (3d), fixed detain (3d) dress is in can rotate in shell (1), fixed detain (3d) dress is in shell (1) internal rotation in-process, locking boss (3d01) on fixed knot (3d) can be followed breach (1a) on shell (1) are stretched out or are withdrawn.

2. The mechanical assembly of a plug-in circuit breaker according to claim 1, characterized in that: the tripping actuator (3f) comprises a tripping button (3f01) and a lock catch (3f02), the tripping button (3f01) is rotatably arranged on the contact support piece (3c), the connecting rod (3b) is further linked with one end connected with the contact support piece (3c) to form the tripping button (3f01), the lock catch (3f02) is rotatably arranged on the contact support piece (3c), and the lock catch (3f02) can lock and unlock the tripping button (3f01) so as to lock and unlock the movement of the connecting rod (3b) to realize the locking and unlocking of the mechanism assembly (3).

3. The mechanical assembly of a plug-in circuit breaker according to claim 1, characterized in that: when the operating piece (3a) drives the contact support piece (3c) to move through the connecting rod (3b) so as to drive the moving contact (202) and the static contact (201) to be switched on and off, the fixing buckle (3d) is not linked, the operating piece (3a) continues to rotate anticlockwise after being located at a switching-off position, and the connecting rod (3b) can drive the fixing buckle (3d) to rotate anticlockwise so as to enable the locking boss (3d01) to retract from the notch (1a) in the shell (1);

the fixing buckle (3d) is connected with a return spring (3e) which can enable the fixing buckle (3d) to have a clockwise rotation trend so as to reset.

4. The mechanical assembly of a plug-in circuit breaker according to claim 1, characterized in that: an operating part limiting boss (1g) is arranged on the outer side surface of the shell (1) and can limit the operating part (3a) to rotate clockwise after being switched on.

5. The mechanical assembly of a plug-in circuit breaker according to claim 1, characterized in that: a contact support part limiting boss (1h) is arranged in the shell (1) and can limit the contact support part (3c) to continue to rotate anticlockwise after being switched off.

6. The mechanical assembly of a plug-in circuit breaker according to claim 1, characterized in that: the fixing buckle (3d) is arranged in the shell (1) and rotates coaxially with the operation piece (3 a).

7. The mechanical assembly of a plug-in circuit breaker according to claim 1, characterized in that: the operating piece (3a) comprises an operating body (3a01), a first rotating central hole (3a0101) is formed in the operating body (3a01), the operating body (3a01) is mounted on a shaft I (1b) in the housing (1) through the rotating center hole I (3a0101) and can rotate around the shaft I (1b), one end of the operation body (3a01) is provided with a connecting rod mounting hole (3a0102), one end of the connecting rod (3b) passes through the connecting rod mounting hole (3a0102) and extends into a linkage groove (3d0202) on the fixing buckle (3d), the other end of the operation body (3a01) is a handle end (3a0103), the handle end (3a0103) is stressed to drive the operation body (3a01) to rotate around the first shaft (1b) to realize the opening and closing control of the switch device, the handle end (3a0103) is provided with a pull-out feature (3a0103a) for pulling the switch device out of the switch mounting cabinet.

8. The mechanical assembly of a plug-in circuit breaker according to claim 7, characterized in that: the pull-out feature (3a0103a) is a protrusion provided on the handle end (3a 0103).

9. The mechanical assembly of a plug-in circuit breaker according to claim 7, characterized in that: the connecting rod mounting hole (3a0102) is a kidney-shaped hole.

10. The mechanical assembly of a plug-in circuit breaker according to claim 7, characterized in that: the handle torsion spring (3a0104) is mounted on the operation body (3a01), and the handle torsion spring (3a0104) is mounted in the handle torsion spring mounting groove (3a0105) on the operation body (3a01) to enable the operation body (3a01) to have a clockwise rotation trend.

11. The mechanical assembly of a plug-in circuit breaker according to claim 1, characterized in that: the fixed knot (3d) is including fixed knot body (3d02), fixed knot body (3d02) bottom is provided with locking boss (3d01), locking boss (3d01) along fixed knot body (3d02) rotate the in-process can follow breach (1a) on shell (1) are stretched out or are withdrawn, fixed knot body (3d02) upper end is provided with spring mounting boss (3d0201) and is used for hanging reset spring (3e), be equipped with linkage groove (3d0202) on the fixed knot body (3d02) and be used for holding connecting rod (3b) one end that passes from connecting rod mounting hole (3a0102), fixed knot body (3d02) upper end is equipped with position limit boss (3d0203) and is used for restricting the motion stroke of connecting rod (3 b).

12. The mechanical assembly of a plug-in circuit breaker according to claim 11, characterized in that: the fixed buckle body (3d02) is provided with a second rotating center hole (3d0204), and the fixed buckle body (3d02) is mounted on a second shaft (1c) in the shell (1) through the second rotating center hole (3d0204) and can rotate around the second shaft (1 c).

13. The mechanical assembly of a plug-in circuit breaker according to claim 7 or 11, characterized in that: the linkage groove (3d0202) is a frustum-shaped linkage groove.

14. The mechanical assembly of a plug-in circuit breaker according to claim 1, characterized in that: the method is characterized in that: the contact support member (3c) comprises a contact support body (3c01), a rotating center hole III (3c02) is arranged on the contact support body (3c01), the contact support body (3c01) is installed on a shaft III (1d) in the shell (1) by utilizing the rotating center hole III (3c02), a connecting rod groove (3c0101) is arranged on the contact support body (3c01), the other end of the connecting rod (3b) penetrates through a linkage hole (3f0101) on a jump buckle (3f01) and is installed in the connecting rod groove (3c0101), a moving contact installation groove (3c0102) is installed on the contact support body (3c01), a torsion spring (3c0103) is installed on the contact support body (3c01) to abut against the moving contact (202), so that the moving contact (202) is arranged in the moving contact installation groove (3c0102), and after the moving contact (202) and the static contact (201) can act on the moving contact in the installation groove (3c0103) under the action of force To the contact support body (3c 01).

15. The mechanical assembly of a plug-in circuit breaker according to claim 14, characterized in that: one end of the torsion spring (3c0103) is sleeved on a torsion spring shaft (3c0104) of the contact support body (3c01) to press against the moving contact (202).

16. The mechanical assembly of the plug-in circuit breaker according to claim 2, characterized in that: the jump button (3f01) is rotatably arranged on a convex shaft (3c03) on the contact support (3c), the lock catch (3f02) is rotatably mounted on the contact support (3c) by means of a lock catch shaft (3f0204), the lock catch (3f02) comprises a linkage arm (3f0201) and a locking arm (3f0202), a first step (3f0202a) is arranged on the locking arm (3f0202), a step two (3f01a) corresponding to the step one (3f0202a) is arranged on the jump buckle (3f01), the lap joint of the first step (3f0202a) and the second step (3f01a) forms the locking of the lock catch (3f02) to the jump buckle (3f01), the linkage arm (3f0201) rotates anticlockwise under the action of external force to drive the locking arm (3f0202) to rotate anticlockwise, so that the step I (3f0202a) is far away from the step II (3f01a) to unlock the jump buckle (3f 01).

17. The mechanical assembly of a plug-in circuit breaker according to claim 16, characterized in that: the lock catch (3f02) is provided with a lock catch reset torsion spring (3f0203) which can enable the lock catch (3f02) to have a clockwise rotation reset tendency.

18. The mechanical assembly of a plug-in circuit breaker according to claim 3, characterized in that: one end of the return spring (3e) is hung on the spring mounting boss (3d0201), and the other end is hung on the spring mounting convex column (3c0105) on the contact support body (3c 01).

19. The mechanical assembly of a plug-in circuit breaker according to claim 3 or 18, characterized in that: the return spring (3e) is a pressure spring.

Images