阅读说明：本技术 一种***式断路器的连接机构 (Connecting mechanism of plug-in circuit breaker ) 是由 叶益帆 黄中甫 叶杰 叶定友 王光生 于 2019-10-12 设计创作，主要内容包括：本发明涉及断路器领域，具体为一种插入式断路器的连接机构，包括机箱外壳，机箱外壳的左侧输入端设有手柄，所述手柄的输出端通过一根连杆与断路器本体的曲柄传动连接，所述手柄的正下方设有一个拉环推杆，所述拉环推杆的输出端头部设有用于锁死插入机箱外壳外接负载线的锁死机构，所述手柄的中间位置处设有止退孔，所述拉环推杆对应手柄的止退孔的位置设有止退槽，所述手柄的止退孔内设有由手柄和拉环推杆相对横向动作而上下移动的止退栓；避免出现在手柄处于ON的状态下，负载线由于意外出现断开，而出现电弧。(The invention relates to the field of circuit breakers, in particular to a connecting mechanism of a plug-in circuit breaker, which comprises a case shell, wherein a handle is arranged at the left input end of the case shell, 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, a locking mechanism used for locking a load line externally connected with the case shell is arranged at the head part of the output end of the pull ring push rod, a stopping hole is arranged at the middle position of the handle, a stopping groove is arranged at the position of the pull ring push rod corresponding to the stopping hole of the handle, and a stopping bolt which moves up and down by the relative transverse action of the handle and the pull ring push rod is arranged; the phenomenon that the load line is disconnected accidentally to cause electric arcs when the handle is in an ON state is avoided.)

1. The utility model provides a coupling mechanism of bayonet circuit breaker, includes chassis exterior (1), and the left side input of chassis exterior (1) is equipped with handle (2), the output of handle (2) is connected its characterized in that through a connecting rod (3) and crank (4) transmission of circuit breaker body: be equipped with a pull ring push rod (5) under handle (2), the output head of pull ring push rod (5) is equipped with the locking mechanism that is used for locking the external load line of inserting chassis housing, the intermediate position department of handle (2) is equipped with stopping hole (6), the position that pull ring push rod (5) correspond stopping hole (6) of handle (2) is equipped with stopping groove (7), be equipped with in stopping hole (6) of handle (2) and be equipped with stopping bolt (8) that reciprocate by handle (2) and pull ring push rod (5) relative transverse motion.

2. A connection mechanism of a plug-in type circuit breaker according to claim 1, characterized in that: stopping hole (6) of the left and right sides border handle (2) of stopping bolt (8) reciprocate, be first inclined plane (9) towards the right bank above the left side of the stopping hole (6) of handle (2), the right side limit of stopping groove (7) of pull ring push rod (5) is second inclined plane (10) towards the right bank, the left side top of stopping bolt (8) is equipped with third inclined plane (11) that correspond stopping hole (6) first inclined plane (9), the right side lower part of stopping bolt (8) is equipped with fourth inclined plane (12) that correspond stopping groove second inclined plane (10).

3. A connection mechanism of a plug-in type circuit breaker according to claim 2, characterized in that: the dead mechanism of lock includes that two bilateral symmetry rotate left cam (13) and right cam (14) that set up at pull ring push rod (5) output end head, the place ahead of pull ring push rod (5) is equipped with one with pull ring push rod (5) direction of advance vertically horizontal barricade (15), the maximum interval between horizontal barricade (15) and pull ring push rod (5) is the length of left cam (13), the left side of left cam (13) is equipped with one left V type spring leaf (16), the right side of right cam (14) is equipped with one right V type spring leaf (17), the left side of left side V type spring leaf (16) is equipped with left side that is used for inserting left load line (18) and inserts passageway (19), the right side of right side V type spring leaf (17) is equipped with right side that is used for inserting right load line (20) and inserts passageway (21).

4. A connection mechanism of a plug-in type circuit breaker according to claim 3, characterized in that: the utility model discloses a quick-witted case, including handle (2), machine case buckle (22) that the direction of motion is perpendicular are equipped with one to left side wall trompil (26) of machine case shell (1), machine case buckle (22) are including buckle spare (24) and setting at inside slider (25) of machine case shell (1), buckle spare (24) width equals with left side wall trompil (26), and relative left side wall trompil (26) business turn over, slider (25) are square, and slider (25) inner chamber is equipped with spring (27), the left end of spring (27) is in with slider (25).

5. The chamber offsets, the right-hand member of spring (27) offsets with a locating piece (28), locating piece (28) are perpendicular in case shell (1) and set up in slider (25) inner chamber right part, when handle (2) impeld to the on-state, the left lateral wall of handle (2) and the right lateral wall of slider (25) offset.

6. A connection mechanism of a plug-in type circuit breaker according to claim 3 or 4, characterized in that: the left wall that inserts passageway (19) on a left side is equipped with left binding post (29), the right wall that inserts passageway (21) on the right side is equipped with right binding post (30), left side binding post (29) are the L type, upper arm (31) subsides of left side binding post (29) are established on the left wall that inserts passageway (19) on a left side, and the right side of terminal upper arm (31) of left binding post (29) is equipped with left through groove (32) that the direction was arranged about one row of a plurality of is parallel, arm (33) connect to coil (34) under the terminal of left side binding post (29), right side binding post (30) are followed the right wall setting that the right side inserted passageway (21) and are connected to the load.

7. A connection mechanism of a plug-in type circuit breaker according to claim 3 or 4, characterized in that: horizontal barricade (15) fixed mounting is in chassis exterior (1), the intermediate position of horizontal barricade (15) is equipped with an circular arc recess (35), the head that left cam (13) and right cam (14) closed together sets up in circular arc recess (35), when left cam (13) and right cam (14) are turned left and right respectively, the circular arc limit along circular arc recess (35) slides, the output head of pull ring push rod (5) rotates installation left cam (13) and right cam (14) through a round pin axle (36).

8. A connection mechanism of a plug-in type circuit breaker according to claim 3 or 4, characterized in that: the left V-shaped spring piece (16) and the right V-shaped spring piece (17) are symmetrically arranged and have the same structure, the left V-shaped spring piece (16) is installed in the chassis shell (1) through a left positioning pin (37), the right V-shaped spring piece (17) is arranged in the chassis shell (1) through a right positioning pin (38), a right spring arm of the left V-shaped spring piece (16) is propped against the left cam (13), a left spring arm of the left V-shaped spring piece (16) is inserted into the channel (19) towards the left, the left cam (13) is driven by the pull ring push rod (5) to rotate to the left, the left cam (13) pushes a right spring arm of the left V-shaped spring piece (16), and a left spring arm of the left V-shaped spring piece (16) locks a left load line (18) inserted into the left insertion channel (19).

9. A connection mechanism of a plug-in type circuit breaker according to claim 7, wherein: the left V-shaped spring piece (16) and the right V-shaped spring piece (17) are symmetrically arranged and have the same structure, and a load line groove matched with a left load line (18) is formed in the end face of a left spring arm of the left V-shaped spring piece (16).

10. A connection mechanism of a plug-in type circuit breaker according to claim 3 or 4, characterized in that: case shell (1) interior upper left portion is equipped with one sign separation blade (39), sign separation blade (39) are rotated through a sign axis of rotation (40) and are installed in case shell (1), sign separation blade (39) are including separation blade upper arm (41) and separation blade lower arm (42), separation blade upper arm (41) terminal surface of sign separation blade (39) is equipped with and instructs fender face (43), case shell (1) is opened in the position department that corresponds to instruct fender face (43) and is had an instruction observation hole, sign separation blade (39) are driven by handle (2) and are rotated.

11. A connection mechanism of a plug-in type circuit breaker according to claim 9, characterized in that: the terminal surface of underarm (42) of sign separation blade (39) is opened there is one section stroke recess (45), the left side of handle (2) is equipped with a lug (46), lug (46) slide in stroke recess (45), handle (2) impel, then lug (46) are used in the right-hand member of stroke recess (45) for sign separation blade (39) clockwise turning, instruct to keep off face (43) and leave and instruct the observation hole, handle (2) are extracted, then lug (46) are used in the left end of stroke recess (45) for sign separation blade (39) anticlockwise rotation instructs to keep off face (43) and blocks and instruct the observation hole.

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

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances. The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, and the function of the circuit breaker is equivalent to the combination of a fuse type switch, an over-under-heat relay and the like. Furthermore, no parts need 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 into the circuit breaker, if the circuit breaker can freely perform ON/OFF switching under the condition that the load line is not connected, electric arcs are easy to occur, and safety problems occur.

Disclosure of Invention

The present invention provides a connecting mechanism of a circuit breaker, which is provided to solve the above background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a coupling mechanism of bayonet circuit breaker, includes chassis exterior, and chassis exterior's left side input is equipped with the handle, the output of handle is connected its characterized in that through the crank drive of a connecting rod with the circuit breaker body: the improved structure is characterized in that a pull ring push rod is arranged under the handle, a locking mechanism used for locking and inserting an external load line of the chassis shell is arranged at the head of the output end of the pull ring push rod, a stopping hole is formed in the middle of the handle, a stopping groove is formed in the position, corresponding to the stopping hole of the handle, of the pull ring push rod, and a stopping bolt which is moved up and down through relative transverse motion of the handle and the pull ring push rod is arranged in the stopping hole of the handle.

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

preferably, the locking mechanism comprises a left cam and a right cam which are bilaterally symmetrically and rotatably arranged at the head of the output end of the pull ring push rod, a transverse retaining wall which is perpendicular to the propelling 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 line is arranged on the left side of the left V-shaped spring piece, and a right insertion channel for inserting a right load line is arranged on the left side of the right V;

preferably, the opening of the left side wall of the case shell is provided with a case buckle perpendicular to the moving direction of the handle, the case buckle comprises a buckle part and a sliding part arranged inside the case shell, the width of the buckle part is equal to that of the opening of the left side wall, the buckle part enters and exits relative to the opening of the left side wall, the sliding part is in a shape of a Chinese character kou, the inner cavity of the sliding part is provided with a spring, the left end of the spring abuts against the inner cavity of the sliding part, the right end of the spring abuts against a positioning block, the positioning block is perpendicular to the inside of the case shell and is arranged at the right part of the inner cavity of the sliding part, and when the handle is pushed;

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 distributed in the vertical direction in parallel are formed in the right side of the terminal upper arm of the left connecting terminal, a terminal lower arm of the left connecting terminal is connected to the coil, and the right connecting terminal is arranged along the right wall of the right insertion channel and connected to the load;

preferably, the transverse retaining wall is fixedly installed in the chassis shell, an arc groove is formed in the middle of the transverse retaining wall, the head of the left cam and the head of the right cam which are closed together are arranged in the arc groove, the left cam and the right cam slide along the arc edge of the arc groove when rotating left and right respectively, and the head of the output end of the pull ring push rod is rotatably installed 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, and both the left V-shaped spring piece and the right V-shaped spring piece comprise a left spring arm and a right spring arm, the left V-shaped spring piece is installed in the chassis shell through a left positioning pin, the right V-shaped spring piece is installed in the chassis shell through a right positioning pin, one right spring arm of the left V-shaped spring piece abuts against a left cam, one left spring arm of the left V-shaped spring piece faces towards the left insertion channel, the left cam is driven by the 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;

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 surface of a left spring arm of the left V-shaped spring piece;

preferably, a sign blocking piece is arranged at the upper left part in the case shell and is rotatably installed in the case shell through a sign rotating shaft, the sign blocking piece comprises a blocking piece upper arm and a blocking piece lower arm, an indicating blocking surface is arranged on the end face of the blocking piece upper arm of the sign blocking piece, an indicating observation hole is formed in the case shell at the position corresponding to the indicating blocking surface, and the sign blocking piece is driven to rotate by a handle;

preferably, the terminal surface of the separation blade underarm of sign separation blade is opened there is one section stroke recess, the left side of handle is equipped with a lug, the lug slides in the stroke recess, the handle impels, then the lug is used in the right-hand member of stroke recess for the sign separation blade rotates clockwise, instructs the face of keeping off to leave and instructs the observation hole, the handle is extracted, then the lug is used in the left end of stroke recess for the sign separation blade anticlockwise rotates, instructs the face of keeping off to block and instructs the observation hole.

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

1. through the matched arrangement of the retaining hole, the retaining bolt and the retaining groove, the circuit breaker provided by the invention is ensured to only have the following states: A. the pull ring push rod is pulled out (the load line is not connected in), the handle can not be pushed in, the circuit breaker can only be in the OFF state, B, the pull ring push rod is pushed in (the load line is connected in), the handle is not pushed in, the circuit breaker is in the OFF state, C, the pull ring push rod is pushed in (the load line is connected in), the handle is pushed in, the circuit breaker is in the ON state, the condition that the handle is in the ON state is avoided, the load line is broken OFF due to accidents, and electric arcs appear.

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 for the first time, and compared with the prior art, the locking structure can provide more gentle and stable locking action and obtains great locking force with small push-pull force.

3. The case buckle is additionally arranged, when the handle is pressed in, the breaker is powered on and is connected, the handle case buckle is directly propped, the case buckle cannot be pressed in, and the product cannot be detached under the condition of power on (namely, the product cannot be detached and replaced when the power is on); when the handle is pulled out or the breaker automatically pops out after tripping, the handle is staggered with the position of the case buckle, the case buckle enters the breaker body in parallel and level with the case shell under the pressing of external force, the breaker product can be directly pushed into the device, the negative load line, the positive load line and the signal output end connector are connected, the power-off dismounting work is completed, and the rapid installation and the disassembly are ensured.

4. The left wiring terminal and the right wiring terminal are convenient to set and connected with a load line, the left through groove and the right through groove are added, friction performance is improved, and accidental disconnection is prevented.

5. The arrangement of the arc groove in the middle of the transverse retaining wall enables the left cam and the right cam to move more smoothly when rotating left and right respectively;

6. the user can be reminded in the increase of sign separation blade, and the particular case of this product impels or releases 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 cross-sectional view of the pull ring push rod in a handle break-away state of the present invention;

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

FIG. 3 is a cross-sectional view of the handle broken tab pusher push of the present invention;

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

FIG. 5 is a top view of FIG. 1 with 90 degree rotation of the tab pusher in a push state according to the present invention;

FIG. 6 is a schematic view of the top view of FIG. 1 with 90 degree rotation of the case latch in a movable state and with the handle disconnected;

FIG. 7 is a schematic view of the top view of FIG. 1 with 90 degree rotation of the case latch in a movable state and with the handle disconnected;

FIG. 8 is a top view of FIG. 1 showing a 90 degree rotated case latch with a handle in a locked position according to the present invention;

fig. 9 is a top view of fig. 1 showing a 90-degree rotated case latch with a handle connected.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

In the description of the present invention, it is to 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", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

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

In order to achieve the purpose, the invention provides the following technical scheme: referring to fig. 1, 2 and 3, the following descriptions about the left, right, up and down directions are distributed according to the directions of fig. 1, 2 and 3, a connection mechanism of a plug-in circuit breaker comprises a case housing 1, a handle 2 is arranged at the left input end of the case housing 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 connection mechanism is characterized in that: a pull ring push rod 5 is arranged under the handle 2, a locking mechanism used for locking and inserting an external load line of the chassis shell 1 is arranged at the head of an output end of the pull ring push rod 5, a stopping hole 6 is arranged at the middle position of the handle 2, a stopping groove 7 is arranged at the position, corresponding to the stopping hole 6 of the handle 2, of the pull ring push rod 5, and a stopping bolt 8 which is moved up and down by the handle 2 and the pull ring push rod 5 in a relative transverse motion mode is arranged in the stopping hole 6 of the handle 2.

Preferably, in fig. 1, 2 and 3, the left, right, up and down directions of the following contents are distributed according to the directions of fig. 1, 2 and 3, the left and right sides of the retaining bolt 8 move up and down along the retaining hole 6 of the handle 2, the left upper edge of the retaining hole 6 of the handle 2 is a first inclined surface 9 inclined to the right, the right side of the retaining groove 7 of the pull-tab push rod 5 is a second inclined surface 10 inclined to the right, the left upper portion of the retaining bolt 8 is provided with a third inclined surface 11 corresponding to the first inclined surface 9 of the retaining hole 6, the right lower portion of the retaining bolt 8 is provided with a fourth inclined surface 12 corresponding to the second inclined surface 10 of the retaining groove 7, and the circuit breaker provided with the connection mechanism provided by the present invention is ensured by the matching arrangement of the retaining hole 6, the retaining bolt 8 and the retaining groove 7, and only the following states occur: A. pull ring push rod 5 is extracted (load line does not insert), handle 2 can't impel, the circuit breaker can only be in the state of OFF, B. pull ring push rod 5 impels (load line inserts), handle 2 does not impel, the circuit breaker is in the state of OFF, C. pull ring push rod 5 impels (load line inserts), handle 2 impels, the circuit breaker is in the state of ON, avoid appearing under handle 2 is in the state of ON, the load line is because unexpected the disconnection appears, and electric arc appears, the actual working principle is as follows: when the pull ring push rod 5 is pulled out, the retaining bolt 8 leaves from the retaining groove 7 along the second inclined surface 10, the whole retaining bolt 8 enters the retaining hole 6, at this time, the left side edge of the retaining bolt 8 is propped against the first inclined surface 9 of the handle 2, the handle 2 can only be in an OFF state, the handle 2 can only realize ON/OFF switching after the pull ring push rod 5 is pushed and the retaining bolt 8 falls into the retaining groove 7, the handle 2 can only realize ON/OFF switching after the load line is actually kept connected, the accidental disconnection of the load line and the occurrence of electric arc when the handle 2 is in an ON state (when the circuit breaker is electrified) are prevented, in the case of fig. 1, in which the tab pusher 5 is pulled out, the handle 2 can only be in the OFF state, in fig. 2, the handle 2 is in the OFF state when the tab pusher 5 is pushed, and in fig. 3, the handle 2 is in the ON state when the tab pusher 5 is pushed.

Preferably, referring to fig. 4 and 5, the left, right, up and down directions of the following contents 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 bilaterally symmetrically and rotatably arranged at the head parts of the output ends of the pull-ring push rods 5, a transverse wall 15 which is perpendicular to the pushing direction of the pull-ring push rods 5 is arranged in front of the pull-ring push rods 5, the maximum distance between the transverse wall 15 and the pull-ring push rods 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 the left load line 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 the right load line 20 is arranged at the left side of the right V-shaped spring 27 piece 17, and the push rods 5-left cam 13/right cam 14- The locking structure of the spring 27 piece 17 to the load line ensures the fixation of the load line, and compared with the prior art, the locking structure can provide more gentle and stable locking action and obtain large locking force with small push-pull force.

The actual working principle is as follows: as shown in fig. 4, at this time, when the pulling-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 lines are inserted into the left insertion channel 19 and the right insertion channel 21 respectively, then the pulling-ring push rod 5 is pushed, the left cam 13 and the right cam 14 are rotated leftwards and rightwards respectively along the arc groove 35 of the transverse retaining wall 15, and the forces act on the left V-shaped spring 27 piece 16 and the right V-shaped spring 27 piece 17 respectively, and the left V-shaped spring 27 piece 16 and the right V-shaped spring 27 piece 17 are forced to act on the load lines, so that the load lines are locked, and the load lines are prevented from being pulled out accidentally;

preferably, referring to fig. 6, 7, 8 and 9, the left, right, up and down directions of the following contents are distributed according to the directions of fig. 6, 7, 8 and 9, a left sidewall opening 26 of the chassis housing 1 is provided with a chassis latch 22 perpendicular to the moving direction of the handle 2, the chassis latch 22 includes a latch 24 and a slider 25 disposed inside the chassis housing 1, the latch 24 has a width equal to that of the left sidewall opening 26 and is advanced relative to the left sidewall opening 26, the slider 25 is square, an inner cavity of the slider 25 is provided with a spring 27, a left end of the spring 27 abuts against an inner cavity of the slider 25, a right end of the spring 27 abuts against a positioning block 28, the positioning block 28 is disposed vertically in the chassis housing 1 and at the right portion of the inner cavity of the slider 25, when the handle 2 is advanced to the wiring state, the left sidewall of the handle 2 abuts against the right sidewall of the slider 25 to increase the chassis latch 22, when the handle 2 is pressed in, the breaker is powered on, the case buckle 22 of the handle 2 is directly propped, the case buckle 22 cannot be pressed in, and the product cannot be detached under the condition of power on (namely, the product cannot be detached and replaced when the power is on); when the handle 2 is pulled out or the circuit breaker automatically pops up after jumping, the position of the handle 2 is staggered with the position of the case buckle 22, the case buckle 22 enters the circuit breaker body under the pressing of external force and is flush with the case shell 1, the circuit breaker product can be directly pushed into the device, the negative load line, the positive load line and the signal output end connector are connected, the power-off dismounting work is completed, and the rapid installation and dismounting are ensured;

preferably, referring to fig. 4 and 5, the left, right, up and down directions of the following contents are distributed according to the directions of fig. 4 and 5, a left wall of the left insertion channel 19 is provided with a left connection terminal 29, a right wall of the right insertion channel 21 is provided with a right connection terminal 30, the left connection terminal 29 is L-shaped, a terminal upper arm 31 of the left connection terminal 29 is attached to the left wall of the left insertion channel 19, the right side of the terminal upper arm 31 of the left connection terminal 29 is provided with a row of a plurality of left through grooves 32 arranged in parallel up and down directions, a terminal lower arm 33 of the left connection terminal 29 is connected to the coil 34, the right connection terminal 30 is arranged along the right wall of the right insertion channel 21 and connected to the left connection terminal 29 and the right connection terminal 30 of the load, and the left through groove 32 and the right through groove are added to increase the friction performance and prevent accidental wire breakage.

Preferably, referring to fig. 4 and 5, the left, right, up and down directions of the following contents 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 arranged 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 closed together are arranged in the arc groove 35, when the left cam 13 and the right cam 14 respectively rotate left and right, the arrangement of the arc groove 35 in the middle of the transverse retaining wall 15 is slid along the arc edge of the arc groove 35, so that the left cam 13 and the right cam 14 respectively rotate left and right, the motion is smoother, and the head of the output end 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;

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 a simpler and more convenient structure is selected as follows: