CN110828245B

CN110828245B - Connecting mechanism of plug-in circuit breaker

Info

Publication number: CN110828245B
Application number: CN201910966255.6A
Authority: CN
Inventors: 叶益帆; 黄中甫; 叶杰; 叶定友; 王光生
Original assignee: Zhejiang Zhongyihao Technology Co ltd
Current assignee: Zhejiang Zhongyihao Technology Co ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2025-07-08
Anticipated expiration: 2039-10-12
Also published as: CN110828245A

Abstract

The invention relates to the field of circuit breakers, in particular to a connecting mechanism of an insertion type circuit breaker, which comprises a chassis shell, wherein the left input end of the chassis shell is provided with a handle, the output end of the handle is in transmission connection with a crank of a circuit breaker body through a connecting rod, a pull ring push rod is arranged right below the handle, the head part of the output end of the pull ring push rod is provided with a locking mechanism for locking an external load wire inserted into the chassis shell, the middle position of the handle is provided with a retaining hole, the position of the pull ring push rod corresponding to the retaining hole of the handle is provided with a retaining groove, the retaining hole of the handle is internally provided with a retaining bolt which is moved up and down by the relative transverse motion of the handle and the pull ring push rod, and the occurrence of arc of the load wire due to unexpected disconnection when the handle is in an ON state is avoided.

Description

Connecting mechanism of plug-in circuit breaker

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a connecting mechanism of a plug-in circuit breaker.

Background

A circuit breaker is a switching device capable of closing, carrying and breaking a current under normal circuit conditions and capable of closing, carrying and breaking a current under abnormal circuit conditions for a prescribed time. The circuit breaker is divided into a high-voltage circuit breaker and a low-voltage circuit breaker according to the application range, and the division of a high-voltage boundary line and a low-voltage boundary line is fuzzy, and is generally called as a high-voltage electrical appliance with the voltage of more than 3 kV. The circuit breaker can be used for distributing electric energy, starting the asynchronous motor infrequently, protecting a power line, the motor and the like, and automatically cutting off the circuit when serious overload or short circuit, undervoltage and other faults occur, and the functions of the circuit breaker are equivalent to the combination of a fuse type switch, an over-under-heating relay and the like. And the parts are not required to be changed after breaking the fault current.

However, the circuit breaker in the prior art lacks a protection structure for preventing the handle from being disconnected after the load line is connected to the circuit breaker, if the circuit breaker can freely switch the entry ON/OFF under the condition that the load line is not connected to the circuit breaker, an arc is easy to occur, and a safety problem is easy to occur, and preferably, a structure can ensure that the circuit breaker can realize the ON/OFF state switching only after the load line is connected to the circuit breaker.

Disclosure of Invention

The invention aims to provide a connecting mechanism of a circuit breaker, which aims to solve the problem that the connecting mechanism of a plug-in circuit breaker is provided in the prior art.

In order to achieve the above purpose, the present invention provides the following technical solutions: the connecting mechanism of the plug-in circuit breaker comprises a chassis shell, wherein a handle is arranged at the left input end of the chassis shell, the output end of the handle is connected with a crank of a circuit breaker body through a connecting rod in a transmission mode, and the connecting mechanism is characterized in that a pull ring push rod is arranged right below the handle, a locking mechanism for locking an external load wire inserted into the chassis shell is arranged at the output end head of the pull ring push rod, a retaining hole is arranged at the middle position of the handle, a retaining groove is arranged at the position, corresponding to the retaining hole of the handle, of the pull ring push rod, and a retaining bolt which moves up and down by the relative transverse motion of the handle and the pull ring push rod is arranged in the retaining hole of the handle.

Preferably, the left side and the right side of the stop bolt move up and down along the stop hole of the handle, the upper edge of the left side of the stop hole of the handle is a first inclined plane which inclines to the right, the right side of the stop groove of the pull ring push rod is a second inclined plane which inclines to the right, the upper part of the left side of the stop bolt is provided with a third inclined plane which corresponds to the first inclined plane of the stop hole, and the lower part of the right side of the stop bolt is provided with a fourth inclined plane which corresponds to the second inclined plane of the stop groove;

Preferably, the locking mechanism comprises two left cams and right cams which are symmetrically arranged at the head part of the output end of the pull ring push rod in a left-right rotating way, a transverse retaining wall which is perpendicular to the pushing direction of the pull ring push rod is arranged in front of the pull ring push rod, the maximum distance between the transverse retaining wall and the pull ring push rod is the length of the left cam, a left V-shaped spring piece is arranged on the left side of the left cam, a right V-shaped spring piece is arranged on the right side of the right cam, a left insertion channel for inserting a left load wire is arranged on the left side of the left V-shaped spring piece, and a right insertion channel for inserting a right load wire is arranged on the left side of the right V-shaped spring piece;

Preferably, the left side wall of the case shell is provided with a case buckle vertical to the moving direction of the handle, the case buckle comprises a buckle piece and a sliding piece arranged in the case shell, the width of the buckle piece is equal to that of the left side wall of the case shell, the left side wall of the case shell is opposite to that of the left side wall of the case shell, the sliding piece is in a shape like a Chinese character kou, an inner cavity of the sliding piece is provided with a spring, the left end of the spring is propped against the inner cavity of the sliding piece, the right end of the spring is propped against a positioning block, the positioning block is vertically arranged in the case shell and is arranged at the right part of the inner cavity of the sliding piece, and when the handle is pushed to be in a connected state, the left side wall of the handle is propped against the right side wall of the sliding piece;

Preferably, a left connecting terminal is arranged on the left wall of the left insertion channel, a right connecting terminal is arranged on the right wall of the right insertion channel, the left connecting terminal is L-shaped, a terminal upper arm of the left connecting terminal is attached to the left wall of the left insertion channel, a row of a plurality of left through grooves which are arranged in parallel in the up-down direction are arranged on the right side of the terminal upper arm of the left connecting terminal, a terminal lower arm of the left connecting terminal is connected with a coil, and the right connecting terminal is arranged along the right wall of the right insertion channel and is connected with a load;

preferably, the transverse retaining wall is fixedly arranged in the chassis shell, an arc groove is formed in the middle of the transverse retaining wall, the head parts of the left cam and the right cam which are combined are arranged in the arc groove, when the left cam and the right cam rotate left and right respectively, the left cam and the right cam slide along the arc edge of the arc groove, and the output end head part of the pull ring push rod is rotationally provided with the left cam and the right cam through a pin shaft;

Preferably, the left V-shaped spring piece and the right V-shaped spring piece are symmetrically arranged and have the same structure, the V-shaped spring pieces comprise left spring arms and right spring arms, the left V-shaped spring piece is arranged in the chassis shell through a left locating pin, the right V-shaped spring piece is arranged in the chassis shell through a right locating pin, one right spring arm of the left V-shaped spring piece is propped against a left cam, one left spring arm of the left V-shaped spring piece faces towards a left insertion channel, the left cam is driven by a pull ring push rod to rotate leftwards, the left cam pushes the right spring arm of the left V-shaped spring piece, and the left spring arm of the left V-shaped spring piece locks a left load line inserted into the left insertion channel;

preferably, the left V-shaped spring piece and the right V-shaped spring piece are symmetrically arranged and have the same structure, and a load line groove matched with a left load line is formed in the end face of a left spring arm of the left V-shaped spring piece;

preferably, a sign baffle is arranged at the left upper part in the case shell and is rotatably arranged in the case shell through a sign rotating shaft, the sign baffle comprises a baffle upper arm and a baffle lower arm, the end face of the baffle upper arm of the sign baffle is provided with a sign baffle surface, the case shell is provided with a sign observation hole at the position corresponding to the sign baffle surface, and the sign baffle is driven to rotate by a handle;

Preferably, the end face of the lower arm of the baffle of the indication board baffle is provided with a section of travel groove, the left side of the handle is provided with a lug, the lug slides in the travel groove, the handle is pushed in, the lug acts on the right end of the row Cheng Aocao, the indication board baffle rotates clockwise, the indication baffle leaves the indication observation hole, the handle is pulled out, the lug acts on the left end of the row Cheng Aocao, the indication board baffle rotates anticlockwise, and the indication baffle blocks the indication observation hole.

Compared with the prior art, the invention has the beneficial effects that:

1. The cooperation of the retaining hole, the retaining bolt and the retaining groove ensures that the breaker provided by the connecting mechanism only has the following states that A, the pull ring push rod is pulled out (a load wire is not connected), the handle cannot be pushed in, the breaker can only be in an OFF state, B, the pull ring push rod is pushed in (the load wire is connected), the handle is not pushed in, the breaker is in an OFF state, C, the pull ring push rod is pushed in (the load wire is connected), the handle is pushed in, the breaker is in an ON state, and the occurrence of arc caused by unexpected disconnection of the load wire in the ON state of the handle is avoided.

2. The locking structure of the pull ring push rod, the left cam, the right cam, the left V-shaped spring piece and the right V-shaped spring piece to the load line is arranged, the load line is fixed, and compared with the prior art, the locking structure can provide more gentle and stable locking action, and a very large locking force is obtained by a very small push-pull force.

3. When the handle is pulled out or the breaker is automatically popped out after tripping, the position of the handle and the machine case buckle is staggered, the machine case buckle enters the breaker body to be flush with the machine case shell under the pressing of external force, the breaker product can be directly pushed into the feeding equipment, the negative load line, the positive load line and the signal output end are connected, the power-off disassembly and assembly work is completed, and the quick installation and disassembly are ensured.

4. The setting of left binding post and right binding post is convenient to be connected with the load line, has increased left logical groove and right logical groove simultaneously, increases friction performance, prevents unexpected broken string.

5. The arrangement of the arc grooves in the middle of the transverse retaining wall ensures that the left cam and the right cam act more smoothly when rotating left and right respectively;

6. the increase of sign separation blade can remind the user, and the specific condition of this product promotes or release at the handle, and the sign separation blade follows the motion, directly sees the condition of demonstration by the sign observation hole.

Drawings

FIG. 1 is a drawing of a pull ring pusher in a handle-off condition of the present invention in a pulled-out cross-section;

FIG. 2 is a cross-sectional view of the push rod of the pull ring in the handle-on state of the present invention;

FIG. 3 is a cross-sectional view of the push rod of the pull ring in the handle-off state of the present invention;

FIG. 4 is a top view of the tab push rod of FIG. 1 rotated 90 degrees in an extended state in accordance with the present invention;

FIG. 5 is a top view of the tab pusher of FIG. 1 rotated 90 degrees in a push-in state in accordance with the present invention;

FIG. 6 is a broken state view of the handle of the enclosure clasp of FIG. 1 in a top view rotated 90 degrees;

FIG. 7 is a view of the handle in an open state with the housing catch movable state of FIG. 1 in a top view and rotated 90 degrees in accordance with the present invention;

FIG. 8 is a handle on state view of the case latch lock state of the present invention shown in FIG. 1 from above and rotated 90 degrees;

fig. 9 is a handle-on state diagram of the case buckle-lock state of the present invention in a top view and rotated 90 degrees from fig. 1.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a number" is two or more, unless explicitly defined otherwise.

In order to achieve the above purpose, the invention provides the following technical scheme that referring to fig. 1,2 and 3, the left, right, up and down directions of the following description are distributed according to the directions of fig. 1,2 and 3, a connecting mechanism of an insertion type circuit breaker comprises a chassis shell 1, a handle 2 is arranged at the left input end of the chassis shell 1, and the output end of the handle 2 is in transmission connection with a crank 4 of a circuit breaker body through a connecting rod 3, and the invention is characterized in that a pull ring push rod 5 is arranged right below the handle 2, a locking mechanism for locking an external load wire inserted into the chassis shell 1 is arranged at the output end head of the pull ring push rod 5, a locking hole 6 is arranged in the middle position of the handle 2, a locking groove 7 is arranged at the position of the pull ring push rod 5 corresponding to the locking hole 6 of the handle 2, and a locking bolt 8 which is moved up and down by the relative transverse motion of the handle 2 and the pull ring push rod 5 is arranged in the locking hole 6 of the handle 2.

Preferably, in fig. 1, fig. 2 and fig. 3, the left, right, up and down directions of the following are distributed according to the directions of fig. 1, fig. 2 and fig. 3, the left and right sides of the stop bolt 8 move up and down along the stop hole 6 of the handle 2, the left upper side of the stop hole 6 of the handle 2 is a first inclined plane 9 inclined towards the right, the right side of the stop groove 7 of the tab push rod 5 is a second inclined plane 10 inclined towards the right, the left upper part of the stop bolt 8 is provided with a third inclined plane 11 corresponding to the first inclined plane 9 of the stop hole 6, the right lower part of the stop bolt 8 is provided with a fourth inclined plane 12 corresponding to the second inclined plane 10 of the stop groove 7, and by the cooperation of the stop hole 6-the stop bolt 8-stop groove 7, the breaker provided with the connecting mechanism of the invention is ensured to only have the following states: A, pull ring push rod 5 is pulled out (load line is not connected), handle 2 cannot be pushed in, the breaker can only be in the state of OFF, B, pull ring push rod 5 is pushed in (load line is connected), handle 2 is not pushed in, the breaker is in the state of OFF, C, pull ring push rod 5 is pushed in (load line is connected), handle 2 is pushed in, the breaker is in the state of ON, the situation that the load line is disconnected accidentally and an arc appears when the handle 2 is in the state of ON is avoided, the actual working principle is that when pull ring push rod 5 is pulled out, stop bolt 8 leaves from stop groove 7 along second inclined plane 10, the whole stop bolt 8 enters into stop hole 6, at this time, the left side edge of stop bolt 8 props against first inclined plane 9 of handle 2, handle 2 can only be in the state of OFF, only after pull ring push rod 5 is pushed in, stop bolt 8 falls into stop groove 7, the handle 2 can realize ON/OFF switching, in fact, after the load line is connected, the handle 2 can realize ON/OFF switching, so that the handle 2 is prevented from being in an ON state (when the circuit breaker is electrified), the load line is accidentally disconnected, an arc is generated, the pull ring push rod 5 is pulled out in the case of fig. 1, the handle 2 can only be in an OFF state, the pull ring push rod 5 is pushed in the case of fig. 2, the handle 2 is in an OFF state, the pull ring push rod 5 is pushed in the case of fig. 3, and the handle 2 is in an ON state.

Preferably, referring to fig. 4 and 5, the left-right up-down directions of the following description are distributed according to the directions of fig. 4 and 5, the locking mechanism comprises two left cams 13 and right cams 14 which are symmetrically arranged at the output end head of the pull ring push rod 5 in a rotating manner, a transverse retaining wall 15 perpendicular to the pushing direction of the pull ring push rod 5 is arranged in front of the pull ring push rod 5, the maximum distance between the transverse retaining wall 15 and the pull ring push rod 5 is the length of the left cam 13, a left V-shaped spring 27 piece 16 is arranged at the left side of the left cam 13, a right V-shaped spring 27 piece 17 is arranged at the right side of the right cam 14, a left insertion channel 19 for inserting a left load wire 18 is arranged at the left side of the left V-shaped spring 27 piece 16, a right pull ring insertion channel 21 for inserting a right load wire 20 is arranged at the left side of the right V-shaped spring 27 piece 17, and the locking mechanism of the push rod 5-left cam 13/right V-shaped spring 27 piece 16/right V-shaped spring 27 piece 17 has a more gentle locking capability to the load wire compared with the prior art, and a very stable locking capability is provided.

The actual working principle is that as shown in fig. 4, at this time, the pull ring push rod 5 is not pushed, the left cam 13 and the right cam 14 are not unfolded and rotated leftwards and rightwards respectively, the load wire is inserted into the left insertion channel 19 and the right insertion channel 21 respectively, then the pull ring push rod 5 is pushed, the left cam 13 and the right cam 14 are rotated leftwards and rightwards along the arc grooves 35 of the transverse retaining wall 15 respectively, and the forces respectively act on the left V-shaped spring 27 piece 16 and the right V-shaped spring 27 piece 17, and the left V-shaped spring 27 piece 16 and the right V-shaped spring 27 piece 17 are acted on the load wire due to the stress, so that the load wire is locked, and the accidental pulling out of the load wire is prevented;

preferably, referring to fig. 6, 7, 8 and 9, the left, right, up and down directions of the contents described below are distributed according to the directions of fig. 6, 7, 8 and 9, a left side wall opening 26 of the case housing 1 is provided with a case buckle 22 perpendicular to the moving direction of the handle 2, the case buckle 22 comprises a buckle 24 and a sliding piece 25 arranged in the case housing 1, the width of the buckle 24 is equal to that of the left side wall opening 26, the sliding piece 25 is in a shape of a Chinese character 'kou', a spring 27 is arranged in an inner cavity of the sliding piece 25, the left end of the spring 27 abuts against an inner cavity of the sliding piece 25, the right end of the spring 27 abuts against a positioning block 28, the positioning block 28 is perpendicular to the inside of the case housing 1 and is arranged at the right part of the inner cavity of the sliding piece 25, when the handle 2 is pushed into a wiring state, the left side wall of the handle 2 abuts against the right side wall of the sliding piece 25, after the handle 2 is pressed in, the case 2 is directly connected with the buckle 22, the buckle 22 is not pressed in, the case housing 22 can be directly pushed in, and the product can not be pulled out of the case housing 22 is directly pulled out, and the product can be dismounted after the circuit breaker is directly or the circuit breaker is pulled out, and the product can be directly pulled out of the circuit breaker is directly, and the circuit breaker is broken, and the product can be directly pulled out of the circuit breaker is broken, or the circuit breaker is broken, and the circuit breaker is directly broken, or the circuit breaker is directly or directly broken;

Preferably, referring to fig. 4 and 5, the left-right up-down directions of the following matters are distributed according to the directions of fig. 4 and 5, the left wall of the left insertion channel 19 is provided with a left connecting terminal 29, the right wall of the right insertion channel 21 is provided with a right connecting terminal 30, the left connecting terminal 29 is L-shaped, a terminal upper arm 31 of the left connecting terminal 29 is attached to the left wall of the left insertion channel 19, a plurality of left through grooves 32 which are arranged in parallel up-down directions are arranged on the right side of a terminal upper arm 31 of the left connecting terminal 29, a terminal lower arm 33 of the left connecting terminal 29 is connected to a coil 34, the right connecting terminal 30 is arranged along the right wall of the right insertion channel 21 and is connected to the left connecting terminal 29 and the right connecting terminal 30 of a load, meanwhile, the left through grooves 32 and the right through grooves are increased, friction performance is increased, and accidental wire breakage is prevented.

Preferably, referring to fig. 4 and 5, the left-right up-down directions of the following description are distributed according to the directions of fig. 4 and 5, the transverse retaining wall 15 is fixedly installed in the chassis housing 1 through bolts, an arc groove 35 is formed in the middle position of the transverse retaining wall 15, the head of the left cam 13 and the head of the right cam 14 which are gathered are arranged in the arc groove 35, when the left cam 13 and the right cam 14 rotate left and right respectively, the arrangement of the middle arc groove 35 of the transverse retaining wall 15 slides along the arc edge of the arc groove 35, so that when the left cam 13 and the right cam 14 rotate left and right respectively, the action is smoother, and the output end head of the pull ring push rod 5 is rotatably installed with the left cam 13 and the right cam 14 through a pin 36;

for the left V-shaped spring 27 piece 16 and the right V-shaped spring 27 piece 17, various structures can be actually selected, and the following simple and convenient structure is selected:

In the case of example 1,

Referring to fig. 4 and 5, the left-right vertical directions of the following description are distributed according to the directions of fig. 4 and 5, the left V-shaped spring 27 piece 16 and the right V-shaped spring 27 piece 17 are symmetrically arranged and have the same structure, the left V-shaped spring 27 piece 16 comprises a left spring 27 arm and a right spring 27 arm, the left V-shaped spring 27 piece 16 is installed in the chassis shell 1 through a left positioning pin 37, the right V-shaped spring 27 piece 17 is installed in the chassis shell 1 through a right positioning pin 38, one right spring 27 arm of the left V-shaped spring 27 piece 16 is propped against the left cam 13, one left spring 27 arm of the left V-shaped spring 27 piece 16 faces the left insertion channel 19, the left cam 13 is driven by the pull ring push rod 5 to rotate leftwards, the left cam 13 pushes the right spring 27 arm of the left V-shaped spring 27 piece 16, the left spring 27 arm of the left V-shaped spring 27 piece 16 is opposite to the left load line 18 inserted into the left insertion channel 19, the left V-shaped spring 27 piece 16 and the right V-shaped spring 27 piece 17 are provided with the same structure, and the left load line of the left V-shaped spring 27 piece 16 is matched with the left load line 18;

The invention is added with other additional structures for the first time, referring to fig. 4 and 5, the upper left part in the chassis housing 1 is provided with a sign baffle 39, the sign baffle 39 is rotatably arranged in the chassis housing 1 through a sign rotating shaft 40, the sign baffle 39 comprises a baffle upper arm 41 and a baffle lower arm 42, the end face of the baffle upper arm 41 of the sign baffle 39 is provided with a sign baffle surface 43, the chassis housing 1 is provided with a sign observation hole at the position corresponding to the sign baffle surface 43, and the sign baffle 39 is driven to rotate by the handle 2;

Preferably, referring to fig. 4 and 5, the left, right, up and down directions of the following are distributed according to the directions of fig. 4 and 5, a section of travel groove 45 is formed on the end face of the lower arm 42 of the sign baffle 39, a bump 46 is arranged on the left side of the handle 2, the bump 46 slides in the row Cheng Aocao, the handle 2 is pushed in, the bump 46 acts on the right end of the travel groove 45, so that the sign baffle 39 rotates clockwise, the sign baffle 43 leaves the indication observation hole, the handle 2 is pulled out, the bump 46 acts on the left end of the row Cheng Aocao, so that the sign baffle 39 rotates anticlockwise, and the sign baffle 43 blocks the indication observation hole.

Compared with the prior art, the invention has the beneficial effects that:

1. Through the matching arrangement of the retaining hole 6, the retaining bolt 8 and the retaining groove 7, the circuit breaker provided by the connecting mechanism only has the following states that A, the pull ring push rod 5 is pulled out (a load line is not connected), the handle 2 cannot be pushed in, the circuit breaker can only be in an OFF state, B, the pull ring push rod 5 is pushed in (the load line is connected), the handle 2 cannot be pushed in, the circuit breaker is in an OFF state, C, the pull ring push rod 5 is pushed in (the load line is connected), the handle 2 is pushed in, the circuit breaker is in an ON state, and the situation that the load line is disconnected due to accidents and an arc is avoided when the handle 2 is in the ON state.

2. The locking structure of the pull ring push rod 5-the left cam 13/the right cam 14-the left V-shaped spring 27 piece 16/the right V-shaped spring 27 piece 17 to the load line is arranged, so that the load line is fixed, and the locking structure can provide more gentle and stable locking action compared with the prior art.

3. The circuit breaker is characterized in that a case buckle 22 is added, when a handle 2 is pressed in, the circuit breaker is powered on, the case buckle 22 of the handle 2 is directly propped against, the case buckle 22 cannot be pressed in, the product cannot be detached under the condition of being powered on (namely, the power on cannot be detached and replaced), when the handle 2 is pulled out or the circuit breaker is automatically popped out after being tripped, the position of the handle 2 and the position of the case buckle 22 are staggered, the case buckle 22 enters the circuit breaker body to be flush with the case shell 1 under the action of external force, the circuit breaker product can be directly pushed into a feeding device, a negative load line, a positive load line and a signal output terminal are connected, the power off detachment and replacement work is completed, and quick installation and detachment are ensured.

4. The arrangement of the left and right connection terminals 29 and 30 facilitates connection with the load line, while the left and right through grooves 32 and 30 are added to increase friction performance and prevent accidental breakage.

5. The arrangement of the arc grooves 35 in the middle of the transverse retaining wall 15 ensures that the left cam 13 and the right cam 14 move more smoothly when rotating leftwards and rightwards respectively;

6. The sign stop 39 is additionally arranged, so that a user can be reminded of the specific condition of the product, the sign stop 39 moves along with the pushing-in or pushing-out of the handle 2, and the display condition is directly seen through the sign observation hole.

Claims

1. The connecting mechanism of the plug-in circuit breaker comprises a chassis shell (1), wherein a handle (2) is arranged at the left input end of the chassis shell (1), the output end of the handle (2) is in transmission connection with a crank (4) of a circuit breaker body through a connecting rod (3), and the connecting mechanism is characterized in that a pull ring push rod (5) is arranged right below the handle (2), a locking mechanism for locking an external load wire is arranged at the output end head part of the pull ring push rod (5), a retaining hole (6) is arranged at the middle position of the handle (2), a retaining groove (7) is arranged at the position of the pull ring push rod (5) corresponding to the retaining hole (6) of the handle (2), and a retaining bolt (8) which moves up and down by relative transverse motions of the handle (2) and the pull ring push rod (5) is arranged in the retaining hole (6) of the handle (2);

The left side and the right side of the stop bolt (8) move up and down along the stop hole (6) of the handle (2), the upper left side of the stop hole (6) of the handle (2) is a first inclined plane (9) inclined towards the right, the right side of the stop groove (7) of the pull ring push rod (5) is a second inclined plane (10) inclined towards the right, the upper left side part of the stop bolt (8) is provided with a third inclined plane (11) corresponding to the first inclined plane (9) of the stop hole (6), and the lower right side part of the stop bolt (8) is provided with a fourth inclined plane (12) corresponding to the second inclined plane (10) of the stop groove;

The locking mechanism comprises a left cam (13) and a right cam (14) which are symmetrically arranged at the output end head of a pull ring push rod (5) in a left-right rotating mode, a transverse retaining wall (15) perpendicular to the pushing direction of the pull ring push rod (5) is arranged in front of the pull ring push rod (5), the maximum distance between the transverse retaining wall (15) and the pull ring push rod (5) is the length of the left cam (13), a left V-shaped spring piece (16) is arranged on the left side of the left cam (13), a right V-shaped spring piece (17) is arranged on the right side of the right cam (14), a left inserting channel (19) for inserting a left load wire (18) is arranged on the left side of the left V-shaped spring piece (16), and a right inserting channel (21) for inserting a right load wire (20) is arranged on the right side of the right V-shaped spring piece (17);

the novel portable multifunctional device is characterized in that a left side wall opening (26) of the case shell (1) is provided with a case buckle (22) perpendicular to the moving direction of the handle (2), the case buckle (22) comprises a buckle part (24) and a sliding part (25) arranged inside the case shell (1), the width of the buckle part (24) is equal to that of the left side wall opening (26), the left side wall opening (26) is opposite to that of the left side wall opening, the sliding part (25) is in a square shape, a spring (27) is arranged in an inner cavity of the sliding part (25), the left end of the spring (27) abuts against the inner cavity of the sliding part (25), the right end of the spring (27) abuts against a positioning block (28), and the positioning block (28) is perpendicular to the inside the case shell (1) and is arranged on the right part of the inner cavity of the sliding part (25), and when the handle (2) is pushed to be in a connected state.

2. The connection mechanism of a plug-in circuit breaker according to claim 1, wherein a left wiring terminal (29) is arranged on the left wall of the left insertion channel (19), a right wiring terminal (30) is arranged on the right wall of the right insertion channel (21), the left wiring terminal (29) is L-shaped, an upper arm (31) of the left wiring terminal (29) is attached to the left wall of the left insertion channel (19), a plurality of left through grooves (32) which are arranged in parallel in the up-down direction are arranged on the right side of the upper terminal arm (31) of the left wiring terminal (29), a terminal lower arm (33) of the left wiring terminal (29) is connected to a coil (34), and the right wiring terminal (30) is arranged along the right wall of the right insertion channel (21) and is connected to a load.

3. The connecting mechanism of the plug-in circuit breaker according to claim 1, wherein the transverse retaining wall (15) is fixedly installed in the chassis housing (1), an arc groove (35) is formed in the middle of the transverse retaining wall (15), the head of the left cam (13) and the head of the right cam (14) which are combined are arranged in the arc groove (35), when the left cam (13) and the right cam (14) rotate leftwards and rightwards respectively, the left cam and the right cam slide along the arc edge of the arc groove (35), and the output end head of the pull ring push rod (5) is rotatably installed with the left cam (13) and the right cam (14) through a pin shaft (36).

4. The connecting mechanism of the plug-in circuit breaker according to claim 1, wherein the left V-shaped spring piece (16) and the right V-shaped spring piece (17) are symmetrically arranged and have the same structure, the V-shaped spring pieces comprise left spring arms and right spring arms, the left V-shaped spring piece (16) is installed in the chassis shell (1) through a left locating pin (37), the right V-shaped spring piece (17) is installed in the chassis shell (1) through a right locating pin (38), one right spring arm of the left V-shaped spring piece (16) is propped against the left cam (13), one left spring arm of the left V-shaped spring piece (16) faces the left insertion channel (19), the left cam (13) is driven by the push rod (5) to rotate leftwards, the left cam (13) pushes the right spring arm of the left V-shaped spring piece (16), and the left spring arm of the left V-shaped spring piece (16) locks a left load wire (18) inserted into the left insertion channel (19).

5. The connection mechanism of a plug-in circuit breaker according to claim 4, wherein the end face of the left spring arm of the left V-shaped spring piece (16) is provided with a load line groove adapted to the left load line (18).

6. The connection mechanism of a plug-in circuit breaker according to claim 1, wherein an indication board baffle (39) is arranged at the upper left part in the chassis housing (1), the indication board baffle (39) is rotatably arranged in the chassis housing (1) through an indication board rotating shaft (40), the indication board baffle (39) comprises a baffle upper arm (41) and a baffle lower arm (42), an indication baffle surface (43) is arranged on the end face of the baffle upper arm (41) of the indication board baffle (39), an indication observation hole is formed in the chassis housing (1) at a position corresponding to the indication baffle surface (43), and the indication board baffle (39) is driven to rotate by a handle (2).

7. The connection mechanism of a plug-in circuit breaker according to claim 6, wherein a section of travel groove (45) is formed in the end face of the lower arm (42) of the indication board baffle piece (39), a protruding block (46) is arranged on the left side of the handle (2), the protruding block (46) slides in the row Cheng Aocao (45), the handle (2) is pushed in, the protruding block (46) acts on the right end of the row Cheng Aocao (45) to enable the indication board baffle piece (39) to rotate clockwise, the indication baffle surface (43) is separated from the indication observation hole, the handle (2) is pulled out, the protruding block (46) acts on the left end of the row Cheng Aocao (45) to enable the indication board baffle piece (39) to rotate anticlockwise, and the indication baffle surface (43) blocks the indication observation hole.