CN110828245A - A connection mechanism of a plug-in circuit breaker - Google Patents

Abstract

The invention relates to the field of circuit breakers, in particular to a connection mechanism of a plug-in circuit breaker, comprising a case shell, the left input end of the case case is provided with a handle, and the output end of the handle is connected with the circuit breaker body through a connecting rod. The crank drive is connected, a pull ring push rod is arranged directly below the handle, and the output end head of the pull ring push rod is provided with a locking mechanism for locking the external load line inserted into the case shell. A stop hole is provided at the position, and a stop groove is provided at the position of the pull ring push rod corresponding to the stop hole of the handle. A moving stop bolt; avoids arcing due to accidental disconnection of the load line when the handle is ON.

Description

A connection mechanism of a plug-in circuit breaker

technical field

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

Background technique

A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions, and can close, carry and break current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, and protect power supply lines and motors. When they have serious overload or short-circuit and under-voltage faults, they can automatically cut off the circuit. Its function is equivalent to a fuse switch. Combination with overheating and underheating relay, etc. Moreover, it is generally not necessary to change the components after breaking the fault current.

However, the circuit breaker in the prior art lacks a protective structure to prevent the handle from disconnecting after the load line is connected to the circuit breaker. If the circuit breaker can freely switch ON/OFF when the load line is not connected , It is prone to arcing and safety problems. It is best to have a structure that can ensure that the circuit breaker can switch ON/OFF states only after the load line is connected.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a connection mechanism of a circuit breaker, so as to solve the above-mentioned background art and propose a connection mechanism of a plug-in circuit breaker.

In order to achieve the above purpose, the present invention provides the following technical solutions: a connection mechanism for a plug-in circuit breaker, comprising a case shell, the left input end of the case case is provided with a handle, and the output end of the handle is connected to the circuit breaker through a connecting rod. The crank drive connection of the device body is characterized in that a pull-ring push rod is arranged directly under the handle, and the output end head of the pull-ring push rod is provided with a lock for locking the external load line inserted into the case shell. mechanism, the middle position of the handle is provided with a stop hole, the position of the pull ring push rod corresponding to the stop hole of the handle is provided with a stop groove, and the stop hole of the handle is provided with a handle and a pull ring The push rod moves up and down relative to the lateral movement.

Preferably, the left and right sides of the stop bolt move up and down along the stop hole of the handle, the upper left side of the stop hole of the handle is a first slope inclined to the right, and the stop groove of the pull ring push rod The right side is a second slope inclined to the right, the upper left part of the stop bolt is provided with a third slope corresponding to the first slope of the stop hole, and the lower part of the right side of the stop bolt is provided with a corresponding stop. Retreat the fourth slope of the second slope;

Preferably, the locking mechanism includes two left cams and right cams that are symmetrically arranged on the output end of the pull-ring push rod, and a transverse direction perpendicular to the pushing direction of the pull-ring push rod is arranged in front of the pull-ring push rod. retaining wall, the maximum distance between the transverse retaining wall and the pull-ring push rod is the length of the left cam, the left side of the left cam is provided with a left V-shaped spring plate, and the right side of the right cam is provided with a left cam a right V-shaped spring sheet, the left side of the left V-shaped spring sheet is provided with a left insertion channel for inserting the left load wire, and the left side of the right V-shaped spring sheet is provided with a right insertion channel for inserting the right load wire;

Preferably, the opening on the left side wall of the case shell is provided with a case snap that is perpendicular to the moving direction of the handle, the case snap includes a snap piece and a sliding piece arranged inside the case shell, and the width of the snap piece is the same as that of the case. The openings on the left side wall are equal, and the openings in and out of the left side wall are opposite. Abutting against a positioning block, the positioning block is perpendicular to the casing of the chassis and is arranged on the right part of the inner cavity of the sliding piece, when the handle is pushed to the connected state, the left side wall of the handle abuts the right side wall of the sliding piece;

Preferably, the left wall of the left insertion channel is provided with a left terminal, the right wall of the right insertion channel is provided with a right terminal, the left terminal is L-shaped, and the upper arm of the left terminal is attached to the left On the left wall of the insertion channel, and the right side of the terminal upper arm of the left terminal is provided with a row of several left through slots arranged in parallel up and down directions, the lower arm of the left terminal is connected to the coil, and the right terminal is connected to the coil. along the right wall of the right insertion channel and connected to the load;

Preferably, the transverse blocking wall is fixedly installed in the casing of the chassis, a circular arc groove is provided in the middle of the transverse blocking wall, and the heads of the left cam and the right cam are arranged in the circular arc groove, and the When the left cam and the right cam rotate to the left and right respectively, they slide along the arc edge of the arc groove, and the head of the output end of the pull ring push rod rotates through a pin to install the left cam and the right cam;

Preferably, the left V-shaped spring sheet and the right V-shaped spring sheet are symmetrically arranged and have the same structure, and both the V-shaped spring sheet includes a left spring arm and a right spring arm, and the left V-shaped spring sheet is mounted on the left positioning pin through a left positioning pin. In the case shell, the right V-shaped spring sheet is installed in the case shell through a right positioning pin, a right spring arm of the left V-shaped spring sheet is in contact with the left cam, and a left spring of the left V-shaped spring sheet The arm faces the left insertion channel, the left cam is driven by the pull ring push rod to rotate to the left, the left cam pushes the right spring arm of the left V-shaped spring plate, and the left spring arm of the left V-shaped spring plate is inserted into the left insertion channel. The load line is locked;

Preferably, the left V-shaped spring sheet and the right V-shaped spring sheet are symmetrically arranged and have the same structure, and the end surface of the left spring arm of the left V-shaped spring sheet is provided with a load line groove adapted to the left load line;

Preferably, an indicator plate cover is provided in the upper left part of the casing of the chassis, the indicator plate plate is rotatably installed in the chassis shell through an indicator plate rotating shaft, and the indicator plate plate includes an upper arm of the plate and a lower arm of the plate , the upper arm end face of the blocking plate of the indicator plate is provided with an indicator blocking surface, the casing shell is provided with an indicator observation hole at the position corresponding to the indicator blocking surface, and the indicator plate blocking plate is driven and rotated by the handle;

Preferably, a stroke groove is formed on the end surface of the lower arm of the stop piece of the indicator plate, and a protrusion is provided on the left side of the handle. The convex block acts on the right end of the stroke groove, so that the indicator plate cover rotates clockwise, the indicating block surface leaves the indicating observation hole, and the handle is pulled out, the convex block acts on the left end of the travel groove, so that the indicator plate plate is reversed. When the hour hand turns, the indicator face blocks the indicator viewing hole.

Compared with the prior art, the beneficial effects of the present invention are:

1. Through the coordination setting of the stop hole, the stop bolt and the stop groove, it is ensured that the circuit breaker installed with the connecting mechanism provided by the present invention will only appear in the following states: A. The pull-ring push rod is pulled out ( The load line is not connected), the handle cannot be advanced, the circuit breaker can only be in the OFF state, B. The pull ring push rod is advanced (the load line is connected), the handle is not advanced, the circuit breaker is in the OFF state, C. The pull ring is pushed The lever is advanced (the load line is connected), the handle is advanced, and the circuit breaker is in the ON state to avoid arcing due to accidental disconnection of the load line when the handle is in the ON state.

2. Set up the locking structure of the pull-ring push rod-left cam/right cam-left V-shaped spring piece/right V-shaped spring piece to the load line, which firstly ensures the fixation of the load line, which can provide A more gentle and stable locking action, and a large locking force can be obtained with a small push and pull force.

3. The chassis buckle is added. When the handle is pressed in, the circuit breaker is energized and connected, the handle chassis buckle is directly resisted, and the chassis buckle cannot be pressed in. This product cannot be removed when it is powered on (that is, it cannot be removed when it is powered on. When the handle is pulled out or the circuit breaker pops up automatically, the position of the handle and the chassis buckle is staggered, and the chassis buckle enters the circuit breaker body and is flush with the chassis shell under the pressure of external force. It can be directly pushed into the equipment, and the negative load line, the positive load line and the signal output terminal connector can be connected to complete the power-off and replacement work to ensure fast installation and removal.

4. The setting of the left terminal and the right terminal is convenient to connect with the load line. At the same time, the left channel and the right channel are added to increase the friction performance and prevent accidental disconnection.

5. The setting of the arc groove in the middle of the transverse retaining wall makes the movement of the left cam and the right cam turn to the left and right respectively, and the movement is smoother;

6. The increase of the indicator plate can remind the user that the specific situation of the product, when the handle is pushed or pushed out, the indicator plate will follow the movement, and the displayed situation can be directly seen from the indicator observation hole.

Description of drawings

Fig. 1 is the pull-out sectional view of the pull-ring push rod in the disconnected state of the handle of the present invention;

FIG. 2 is a sectional view of the push rod of the pull ring push rod in the state where the handle is turned on;

3 is a sectional view of the push rod push rod in the disconnected state of the handle of the present invention;

Fig. 4 is the drawing-out state diagram of the pull-ring push-rod of Fig. 1, which is viewed from a top view and rotated 90 degrees;

Fig. 5 is a drawing state diagram of the pull-ring push rod that is viewed from a top view and rotated 90 degrees of the present invention;

6 is a view of the disconnected state handle in a movable state of the chassis buckle of FIG. 1 and turned 90 degrees from a top view of the present invention;

7 is a view of the disconnected state handle in a movable state of the chassis buckle of FIG. 1 and rotated 90 degrees from a top view of the present invention;

FIG. 8 is a view of the handle in the locked state of the case in a top view and rotated 90 degrees of FIG. 1 of the present invention;

FIG. 9 is a view of the handle in the locked state of the case in a top view of FIG. 1 and rotated 90 degrees according to the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present 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, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation of the present invention.

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

In order to achieve the above object, the present invention provides the following technical solutions: referring to Fig. 1, Fig. 2 and Fig. 3, the orientations of the left and right up and down of the content described below are distributed according to the directions of Fig. 1, Fig. 2 and Fig. 3, a kind of inserting The connection mechanism of the circuit breaker includes a case shell 1, the left input end of the case shell 1 is provided with a handle 2, and the output end of the handle 2 is connected to the crank 4 of the circuit breaker body through a connecting rod 3. There is a pull-ring push rod 5 directly below the handle 2, and the head of the output end of the pull-ring push rod 5 is provided with a locking mechanism for locking the external load line inserted into the case shell 1, and the handle The middle position of 2 is provided with a withdrawal hole 6, the position of the pull ring push rod 5 corresponding to the withdrawal hole 6 of the handle 2 is provided with a withdrawal groove 7, and the withdrawal hole 6 of the handle 2 is provided with a handle 2 and the pull-ring push rod 5 relative to the lateral movement and the stop bolt 8 that moves up and down.

Preferably, as shown in FIGS. 1 , 2 and 3 , the left and right up and down orientations of the content described below are distributed according to the directions of FIGS. 1 , 2 and 3 . The withdrawal hole 6 moves up and down, the upper left side of the withdrawal hole 6 of the handle 2 is a first inclined plane 9 inclined to the right, and the right side of the withdrawal groove 7 of the pull ring push rod 5 is inclined to the right. In the second inclined surface 10, the upper left part of the stop bolt 8 is provided with a third inclined surface 11 corresponding to the first inclined surface 9 of the stop hole 6, and the lower right part of the stop bolt 8 is provided with a corresponding stop groove 7. The fourth inclined surface 12 of the second inclined surface 10, through the matching arrangement of the backstop hole 6-backstop bolt 8-backstop groove 7, ensures that the circuit breaker with the connection mechanism provided by the present invention is installed, and only the following Various states: A. Pull-ring push rod 5 is pulled out (load line is not connected), handle 2 cannot be advanced, and the circuit breaker can only be in the OFF state, B. Pull-ring push rod 5 is advanced (load line is connected), handle 2 is not advanced, the circuit breaker is in the OFF state, C. Pull the ring push rod 5 is advanced (the load line is connected), the handle 2 is advanced, the circuit breaker is in the ON state, avoid the load line when the handle 2 is in the ON state. Due to an accidental disconnection, an arc occurs. The actual working principle is as follows: when the pull-ring push rod 5 is pulled out, the backstop bolt 8 leaves from the backstop groove 7 along the second slope 10, and the backstop bolt 8 enters the stopper. In the withdrawal hole 6, at this time, the left side of the stop bolt 8 is against the first slope 9 of the handle 2, so the handle 2 can only be in the OFF state, only after the pull ring push rod 5 is advanced, the stop bolt 8 falls Handle 2 can switch ON/OFF only after entering into the stop-and-retract slot 7. In fact, only after the load line is connected, can handle 2 achieve ON/OFF switching to prevent handle 2 from being in the ON state (circuit breaker). When the power is turned on), the load line is accidentally disconnected, and an arc occurs. For Figure 1, the pull-ring push rod 5 is pulled out, and the handle 2 can only be in the OFF state. For Figure 2, the pull-ring push rod 5 is pushed forward, The handle 2 is in the OFF state. Referring to Figure 3, the pull-ring push rod 5 is pushed forward, and the handle 2 is in the ON state.

Preferably, referring to FIGS. 4 and 5 , the left, right, up, and down orientations of the content described below are distributed according to the directions of FIGS. 4 and 5 , and the locking mechanism includes two left and right symmetrical rotations arranged at the output end of the pull ring push rod 5 The left cam 13 and the right cam 14 of the head, the front of the pull-ring push rod 5 is provided with a transverse blocking wall 15 perpendicular to the advancing direction of the pull-ring push rod 5, and the lateral blocking wall 15 is connected to the pull-ring push rod 5 The maximum distance between them is the length of the left cam 13, the left side of the left cam 13 is provided with a left V-shaped spring 27 pieces 16, the right side of the right cam 14 is provided with a right V-shaped spring 27 pieces 17, The left side of the left V-shaped spring 27 piece 16 is provided with a left insertion channel 19 for inserting the left load line 18, and the left side of the right V-shaped spring 27 piece 17 is provided with a right insertion channel for inserting the right load line 20. 21. Set up the locking structure of the load line with the pull-ring push rod 5-left cam 13/right cam 14-left V-shaped spring 27 pieces 16/right V-shaped spring 27 pieces 17, which first ensures that the load line is fixed, Compared with the prior art, a more gentle and stable locking action can be provided, and a large locking force can be obtained with a small push-pull force.

Its actual working principle is as follows: as shown in Figure 4, at this time, the pull-ring push rod 5 has not been advanced, then the left cam 13 and the right cam 14 have not been unfolded and rotated to the left and right, respectively, and the left insertion channel 19 and the right insertion are respectively inserted. Insert the load line into the channel 21, and then push the pull ring push rod 5, then the left cam 13 and the right cam 14 rotate to the left and right along the arc groove 35 of the transverse retaining wall 15, respectively, and the force acts on the left V 27 pieces 16 of the type spring and 27 pieces 17 of the right V type spring, 27 pieces 16 of the left V type spring and 27 pieces 17 of the right V type spring due to the force, their force acts on the load line, making them locked, preventing The load line is accidentally pulled out;

Preferably, referring to Fig. 6, Fig. 7, Fig. 8 and Fig. 9, the left, right, up and down orientations of the content described below are distributed according to the directions of Fig. 6, Fig. 7, Fig. 8 and Fig. 9. The wall opening 26 is provided with a case snap 22 that is perpendicular to the moving direction of the handle 2. The case snap 22 includes a snap piece 24 and a sliding piece 25 arranged inside the case shell 1. The width of the snap piece 24 is equal to The openings 26 on the left side wall are equal and enter and exit relative to the openings 26 on the left side wall. The sliding member 25 is in the shape of a mouth. The inner cavity of the sliding member 25 is provided with a spring 27, and the left end of the spring 27 is connected to the inner cavity of the sliding member 25. The right end of the spring 27 is in contact with a positioning block 28. The positioning block 28 is perpendicular to the case shell 1 and is arranged on the right part of the inner cavity of the sliding member 25. When the handle 2 is advanced to the connection state, the The left side wall is against the right side wall of the sliding member 25, and a chassis buckle 22 is added. When the handle 2 is pressed in, the circuit breaker is energized and connected, the handle 2 is directly supported by the chassis buckle 22, and the chassis buckle 22 cannot be pressed in. This product cannot be dismantled under the condition of power-on (that is, it cannot be dismantled and replaced after power-on); when the handle 2 is pulled out or the circuit breaker pops up automatically, the position of the handle 2 and the chassis buckle 22 is staggered, and the chassis buckle 22 is under external force. The circuit breaker product can be directly pushed into the equipment, and the negative load line, the positive load line and the signal output terminal connector are connected to complete the power-off and replacement. work, ensuring quick installation and disassembly;

Preferably, referring to FIG. 4 and FIG. 5 , the left, right, up and down orientations of the content described below are distributed according to the directions of FIG. 4 and FIG. 5 , and the left wall of the left insertion channel 19 is provided with a left terminal 29 . The right wall of the channel 21 is provided with a right terminal 30, the left terminal 29 is L-shaped, the terminal upper arm 31 of the left terminal 29 is attached to the left wall of the left insertion channel 19, and the left terminal 29 is attached. The right side of the upper arm 31 of the terminal is provided with a row of several left through slots 32 arranged in parallel up and down directions. The right wall is arranged and connected to the load left terminal 29 and right terminal 30 to facilitate connection with the load line. At the same time, the left through slot 32 and the right through slot are added to increase friction performance and prevent accidental disconnection.

Preferably, referring to FIGS. 4 and 5 , the left, right, up, and down orientations of the content described below are distributed according to the directions of FIGS. 4 and 5 , and the transverse blocking wall 15 is fixedly installed in the casing 1 by means of bolts. A circular arc groove 35 is provided in the middle position of the wall 15, the heads of the left cam 13 and the right cam 14 are arranged in the circular arc groove 35, and the left cam 13 and the right cam 14 go to the left and right respectively. When rotating, slide the setting of the arc groove 35 in the middle of the transverse retaining wall 15 along the arc edge of the arc groove 35, so that when the left cam 13 and the right cam 14 rotate to the left and right respectively, the action is smoother and the pulling The head of the output end of the ring push rod 5 is rotated to install the left cam 13 and the right cam 14 through a pin shaft 36;

For the left V-shaped spring 27 pieces 16 and the right V-shaped spring 27 pieces 17, a variety of structures can actually be selected, and a relatively simple and convenient structure is selected below:

Example 1,

Referring to Figure 4 and Figure 5, the left, right, up and down orientations of the content described below are distributed according to the directions of Figure 4 and Figure 5, the left V-shaped spring 27 pieces 16 and the right V-shaped spring 27 pieces 17 are symmetrically arranged and have the same structure, And all are V-shaped spring 27 pieces including left spring 27 arm and right spring 27 arm. A right positioning pin 38 is installed in the case shell 1, a right spring 27 arm of the left V-shaped spring 27 piece 16 abuts against the left cam 13, and a left spring 27 arm of the left V-shaped spring 27 piece 16 faces toward The left insertion channel 19, the left cam 13 is driven by the pull ring push rod 5 to rotate to the left, the left cam 13 pushes the right spring 27 arm of the left V-shaped spring 27 pieces 16, the left spring 27 of the left V-shaped spring 27 pieces 16 The arm is locked to the left load line 18 inserted into the left insertion channel 19, the left V-shaped spring 27 pieces 16 and the right V-shaped spring 27 pieces 17 are symmetrically arranged and have the same structure, the left spring 27 arm of the left V-shaped spring 27 pieces 16 There is a load line groove matching with the left load line 18 on the end face of the ;

In addition to the first time, the present invention also adds some other additional structures. Referring to FIG. 4 and FIG. 5 , the upper left part of the chassis shell 1 is provided with an indicator plate blocking piece 39, and the indicator plate blocking plate 39 passes through an indicator plate rotating shaft 40. It is rotatably installed in the casing 1 of the case. The indicator plate 39 includes an upper arm 41 and a lower arm 42. The end face of the upper arm 41 of the indicator plate 39 is provided with an indicator surface 43. The housing 1 is provided with an indication observation hole at the position corresponding to the indication blocking surface 43, and the indication plate blocking piece 39 is driven and rotated by the handle 2;

Preferably, referring to FIGS. 4 and 5 , the left, right, up, and down orientations of the content described below are distributed according to the directions of FIGS. 4 and 5 , and the end face of the lower arm 42 of the stop piece of the sign plate 39 is provided with a travel concave Slot 45, a bump 46 is provided on the left side of the handle 2, the bump 46 slides in the stroke groove 45, and the handle 2 is advanced, the bump 46 acts on the right end of the stroke groove 45, so that The indicator plate blocking piece 39 rotates clockwise, the indicating blocking surface 43 leaves the indicating observation hole, and the handle 2 is pulled out, the bump 46 acts on the left end of the stroke groove 45, so that the indicating plate blocking piece 39 rotates counterclockwise, indicating that the blocking piece 39 is rotated counterclockwise. Face 43 blocks the indicator viewing aperture.

Compared with the prior art, the beneficial effects of the present invention are:

1. Through the matching arrangement of the backstop hole 6-backstop bolt 8-backstop groove 7, it is ensured that the circuit breaker installed with the connection mechanism provided by the present invention will only appear in the following states: A. Pull ring push rod 5 Pull out (the load line is not connected), the handle 2 cannot be pushed forward, and the circuit breaker can only be in the OFF state, B. Pull the ring push rod 5 push (the load line is connected), the handle 2 is not pushed forward, the circuit breaker is OFF state, C. Pull ring push rod 5 is advanced (load line is connected), handle 2 is advanced, the circuit breaker is in the ON state, to avoid the occurrence of arc due to accidental disconnection of the load line when the handle 2 is in the ON state .

2. A locking structure for the load line is provided with the pull-ring push rod 5-left cam 13/right cam 14-left V-shaped spring 27 pieces 16/right V-shaped spring 27 pieces 17, which firstly ensures that the load line is fixed, And compared with the prior art, it can provide a more gentle and stable locking action.

3. The chassis buckle 22 is added. When the handle 2 is pressed in, the circuit breaker is powered on, the handle 2 is directly supported by the chassis buckle 22, and the chassis buckle 22 cannot be pressed in. This product cannot be removed when the power is on. (that is, it cannot be replaced when powered on); when the handle 2 is pulled out or the circuit breaker pops up automatically, the position of the handle 2 and the chassis buckle 22 is staggered, and the chassis buckle 22 enters the circuit breaker body under external force If the chassis shell 1 is flush, the circuit breaker product can be directly pushed into the device, connect the negative load line, the positive load line and the signal output terminal connector, complete the power-off and replacement work, and ensure fast installation and removal.

4. The setting of the left terminal 29 and the right terminal 30 is convenient for connection with the load line, and at the same time, the left through slot 32 and the right through slot are added to increase the friction performance and prevent accidental disconnection.

5. The setting of the arc groove 35 in the middle of the transverse retaining wall 15 makes the movement of the left cam 13 and the right cam 14 turn to the left and right respectively, and the movement is smoother;

6. The addition of the indicator plate blocking piece 39 can remind the user that the specific situation of the product, when the handle 2 is pushed or pushed out, the indicator plate blocking plate 39 will follow the movement, and the displayed situation can be directly seen from the indicator plate observation hole.

Claims (11)

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.

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