JPH09293432A - Operating mechanism for switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operating mechanism for a switch which can be placed in a closed condition by an automatic operation even after in an opened condition by trip action or an automatic break operation in a closed condition by an operating handle (manual closing), in the operating mechanism for the switch device controlling a main contactor of the switch particularly the operating mechanism for the switch which can be drive controlled manually/automatically by a single handle and an automatic operation. SOLUTION: An operating handle 6 is operated, after the main contactor of a switch is placed in a closed condition through a first/second link 3, 4, catch base board 1, the main link 2 and a connection arm 8, in this condition, by a trip device means, a latch arm 9 and the catch base board 1 are disengaged, even in the case of generating an opened condition by trip action or an automatic operation, the main contactor of the switch can be placed in a closed condition by a closing drive means through the connection arm 8. So that closing action by the automatic operation can be performed from the closed condition by trip action or the automatic break operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch operating mechanism for driving and controlling a main contact of a switch, and more particularly to a switch which can be manually and automatically driven and controlled by a single operating handle and automatic operation. Regarding operation mechanism.

[0002]

2. Description of the Related Art Conventionally, a switch operating mechanism of this type has been used in a manual or automatic trip type high voltage AC load switch for opening and closing an electric circuit. FIG. 9 is a side view of a conventional switch operating mechanism in a closed state, and FIG. 10 is a side view of a conventional switch operating mechanism in an open state.

In the figure, a conventional switch operating mechanism is as follows:
A main shaft 101 which is interlocked with a main contactor of a switch and operated to be closed against a return spring and a contact spring (both not shown), a main pawl 102 fixed to the main shaft 101 and rotatable at the same time, and the main shaft 101. A catch shaft 103 coaxially rotatably fitted to the catch shaft 103, a catch substrate 104 fixed to the catch shaft 103 and rotatable at the same time, and a first shaft 107 provided around the periphery of the catch substrate 104. A first arm 108 having a substantially L-shape attached to the main claw 102, the engaging portion at the tip of the first side engaging with the main claw 102, and the catch substrate 1
A second shaft 113, which is provided on the periphery of 04 at a distance from the first shaft 107, is rotatably attached to form a substantially L-shape.
The catch portion 104a at the tip of the first side engages with the engaging portion of the second side of the first arm 108, the second arm 114 having the second side extended in an arc shape, and the device frame ( A tip engaging portion, which is rotatably attached to a shaft supported by (not shown) and extends along the peripheral edge of the catch substrate 104, engages with a catch portion 104a provided on the peripheral edge of the catch substrate 104. Latch piece 125 for holding the closed state
Of the first arm 108 and the second arm 114 by pushing the second side of the second arm 114 driven by the closing electromagnet 118 and the tripping electromagnet 130 which are connected to and driven by the catch substrate 104. The tripping plate 129 for tripping the engagement, the reset spring 123 for urging the catch substrate 104 in the opening direction, and the first arm 1
A reset spring 115 that acts on 08 and urges it in a direction to engage with the main pawl 102; and a reset spring 116 that acts on a second arm 114 and urges in a direction to engage the first arm 108, A reset spring 127 that acts on the latch piece 125 and urges it in a direction to engage with the catch substrate 104, and the trip electromagnet 13
0 or a reset spring 135 that acts on the trip plate 129 to restore the trip plate 129.

In the engagement between the engaging portion on the first side of the first arm 108 and the catch portion of the main pawl 102, the line of action of the engagement action of the main pawl 102 is slightly smaller than that of the first shaft 107. It is arranged so as to pass through the outside. In addition, the first arm 10
8 is engaged with the first side catch portion 114b of the second arm 114, the first arm 10
The line of action of the engaging action force of 8 is disposed so as to pass on or in the vicinity of the second shaft 113. The action point of the trip plate 129 is arranged near the second side of the second arm 114, and the trip point of the trip plate 129 causes the action point to act on the second arm 1.
It is arranged so as to push the action side of 14 and rotate around the second shaft 113. Further, at the time of tripping, the latch piece 125 and the catch substrate 104 are placed at the position where the tip of the vertical side of the first arm 108 pushed out by the main claw 102 contacts.
The catch portion 104a is disposed.

In FIG. 11, the operation handle 6 is switched to either "manual insertion" or "automatic" to drive and control the main contactor of the switch by either manual operation or automatic operation. FIG. 3 is an external front view of a general switch.

[0006]

Since the conventional switch operating mechanism is constructed as described above, when the tripping electromagnet 130 is excited in the automatic operation (far operation), the tripping operation or the tripping operation is performed. It can be opened by the tripping operation, unlocked after confirmation of recovery, and the closing electromagnet 118 can be excited again by automatic operation to enter the closing state. When an accident or a ground fault occurs, the trip signal output is detected and tripping electromagnet 13 is detected.
However, there is a problem in that 0 is excited and is opened by a trip operation, but the lock cannot be released after confirmation of recovery and the closed state cannot be set by automatic operation. That is, FIG.
As shown in, when the manual operation is performed by the operation handle 6 (not shown), if the trip operation causes the operation handle 6 (not shown) to be opened, the operation handle 6 (not shown) is released from the closed state "manual insertion" after being unlocked. Automatic operation status "Automatic"
Only after switching to (reset operation), it is possible to enter the closed state by exciting the closing electromagnet 118 by the automatic operation.

In this way, when the tripping operation changes from the "manual on" state to the open state, it is not possible to excite the closing electromagnet 118 to the closed state by automatic operation. Every time, unless the operator goes to the installation site of the switch and manually operates the operation handle 6 to switch to the manual operation of the reset operation, that is, the "automatic" state, the charging electromagnet 118
Cannot be turned on by the automatic operation.

The present invention has been made in order to solve the above-mentioned problems, and the automatic operation is performed even after the operation handle "manual on" is opened and the tripping operation or the automatic disconnection operation causes the open state. It is an object of the present invention to provide an operating mechanism of a switch which can be operated.

[0009]

SUMMARY OF THE INVENTION A switch operating mechanism according to the present invention includes a catch substrate pivotally supported by a frame of the switch, and a pivot support coaxially with the catch substrate. Of the first link, a main link for opening and closing the main contacts of the switch, the first link having one end rotatably attached to a part of the main link, and the first link of the first link. A second link having one end pivotally attached to the other end and the other end pivotally attached to an axial fulcrum of the catch substrate, the second link being arranged to face the main link; the first link and the second link; Of the breaking spring and the other end of the breaking spring are locked, and are rotatably supported by the frame of the switch, and the other end position of the breaking spring is fixed. One operation handle for moving to one side or the other side of the center line of the second link, One end is connected to the main link, the other end is connected to the main contactor of the switch, and the other end moves with the rotation of the main link, and the one end of the connection arm is rotatable. And a driving means for pulling down the connecting arm to rotate the main link to bring the main contactor of the switch connected to the other end of the connecting arm into a closed state. A latch arm rotatably supported by the frame of the switch and rotatably connected to the other end of the latch arm, which latches the catch substrate at one end to hold the position of the catch substrate. And a tripping drive means for moving the latch arm in a predetermined direction to move the one end side away from the catch substrate to release the catch substrate from the holding state. As described above, in the present invention, after operating the single operation handle to put the main contactor of the switch through the first and second links, the catch substrate, the main link and the connecting arm, When the trip drive means releases the engagement between the latch arm and the catch board and the trip operation or the automatic disconnection operation causes the open state, the closing drive means opens the switch via the connecting arm. Since the main contactor can be put into the closing state, the closing operation can be performed from the opening state by the trip operation or the automatic cutting operation by the automatic operation.

In addition, the operating mechanism of the switch according to the present invention has, if necessary, an auxiliary link whose one end is rotatably supported coaxially with the main link and which rotates with the rotation of the operation handle. A third link whose one end is rotatably supported by the other end of the auxiliary link and whose other end is rotatably supported by a common fulcrum of the first and second links. The rotation of moves the third link to bend the first and second links about a common shaft fulcrum. As described above, according to the present invention, by bending the first and second links around the common shaft fulcrum by the auxiliary link and the third link, the manual operation, the automatic operation, and the opening operation by the trip operation are performed. The main contactor of the switch can be smoothly and surely opened.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment of the Present Invention) An operating mechanism of a switch according to a first embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG. 1 is a schematic configuration diagram of a switch operating mechanism according to the present embodiment, and FIGS. 2 to 6 are schematic configuration diagrams illustrating respective operations of the switch operating mechanism according to the present embodiment.

In each of the drawings, the switch operating mechanism according to the present embodiment has a catch substrate 1 which is rotatably supported by a device frame 50 at a shaft fulcrum 1a, and a shaft fulcrum 1a coaxial with the catch substrate 1. A main link 2 which is rotatably pivotally supported by the main contactor 100 of the switch and which is operated to open and close.
A first link 3 whose one end is rotatably attached to a part of the main link 2, and one end of which is attached to the other end of the first link 3 and whose other end is attached to the shaft of the catch substrate 1. A second link 4 pivotally attached to the fulcrum 1b and arranged to face the main link 2.
And the fulcrum 3a of the first link 3 and the second link 4
And the other end of the breaking spring 5 is locked to be rotatably supported by the device frame 50 at the handle shaft fulcrum 6a. An operation handle 6 for moving the center line of the second link 4 to one side or the other side, and the main link 2
And a movable iron core 7a that is rotatably connected to one end of the connecting arm 8 by a pin 8a and is attracted by excitation. The connecting arm 8 is pulled down to move the main link 2 counterclockwise. By turning the main contactor 100 of the switch to the closed state by rotating the switch, the supporting electromagnet 7 is rotatably supported by the device frame 50 about the shaft supporting point 9b.
A roller 9a is provided at one end, and the latch board 9 holds the catch board 1 by the roller 9a to hold the position of the catch board 1 against the urging force of the breaking spring 5, and the other end of the latch arm 9 It has a movable iron core 10a that is rotatably pin-connected and is attracted by excitation. The latch arm 9 is rotated counterclockwise to separate the roller 9a on one end side from the catch substrate 1 and hold the catch substrate 1. A trip electromagnet 10 that is released from the state and a latch spring 11 that biases the latch arm 9 in the clockwise direction are provided.

The catch board 1 is formed with an arcuate restricting groove 1c which engages with the pin 2a of the main link 2, and the main link 2 is restricted by the restricting groove 1c with respect to the catch board 1 within a predetermined angle range. It is configured to be relatively rotatable only at. In addition, the catch portion 1 is provided above the catch substrate 1.
d is formed and the roller 9a of the latch arm 9 is engaged.

The main link 2 is formed of a substantially triangular plate-like body, is pivotally supported by the device frame 50 at a shaft fulcrum 1a of the first corner portion, and has one end of the first link 3 at the second corner portion. And a pin 2a that engages with the restriction groove 1c of the catch substrate 1 is provided.
This is a configuration in which b is provided.

The first link 3 and the second link 4
Constitutes a crank mechanism that operates by the urging force of the breaking spring 5 applied to the shaft fulcrum 3a to rotate the main link 2 with respect to the catch substrate 1, and rotates the operation handle 6 to cut off the breaking spring 5. When the other end position of is changed,
By changing the direction of the rotational torque acting on the second link 4 around the shaft fulcrum 1b, the second link 4 and the first link 3 are operated, and the main link 2 is rotated in response to the steering wheel operation. It is a mechanism to move. By using this shut-off spring 5, the second end position of the shut-off spring 5 on the operating handle 6 is a dead line in the movement of the second link 4 regardless of the speed at which the operating handle 6 is moved. 4 At the same time as moving from one side to the other side or vice versa across the center line, the second link 4 and the first link 3 quickly move from one predetermined position to another predetermined position, and move to the moved position. It constitutes a stable mechanism (toggle mechanism).

The closing electromagnet 7 is excited by a closing signal sent by automatic operation, attracts the movable iron core 7a,
The main arm 2 is rotated counterclockwise by operating the connecting arm 8 connected to the main arm 2.

The connecting arm 8 is formed of an elongated plate-like member, one end of which is rotatably pin-connected to the movable iron core 7a of the charging electromagnet 7 and the other end of which has a long hole 8b of a predetermined length.
Is provided, and the pin 2b of the main link 2 is rotatably and slidably engaged with the elongated hole 8b. By the engagement of the elongated hole 8b and the pin 2b, the rotation of the main link 2 around the shaft fulcrum 1a is not restricted by the connecting arm 8 unless the movable iron core 7a is sucked and the connecting arm 8 moves downward.

The latch arm 9 has a slender plate-like member substantially centered on the device frame 50 by a shaft fulcrum 9b. A roller 9a is rotatably disposed at one end and a trip electromagnet is disposed at the other end. The movable cores 10a of 10 are rotatably connected by a pin 9c. The latch arm 9 is biased clockwise by a latch spring 11, and the roller 9a is pressed against the outer circumference of the catch substrate 1 except when it is moved counterclockwise by the tripping electromagnet 10, so that the catch portion 1d moves. It is a mechanism that engages and locks as soon as it reaches the position directly below 9a.

The tripping electromagnet 10 is excited by a trip signal output when an accident such as an overcurrent occurs or by a tripping signal sent by automatic operation, so that the movable iron core 1
0a is sucked and the latch arm 9 connected thereto is actuated to release the catch substrate 1 and rotate it clockwise, and the main link 2 rotates clockwise along with the regulation of the catch substrate 1. It is a configuration that allows it.

Next, the opening / closing operation of the switch operating mechanism according to the present embodiment based on the above configuration will be described. First,
As an operation of manually closing the switch, as shown in FIG. 1, the operation handle 6 is rotated clockwise from the off position to the handle shaft fulcrum 6a to the on position, and the operation handle 6 is moved in the direction of arrow A. By the rotation, as shown in FIG. 2 (A), the other end position of the breaking spring 5 on the operation handle 6 becomes a dead line DL in the movement of the second link 4.
When the second link 4 is moved from the one side to the other side beyond the center line of the link 4, the direction of the urging force of the cutoff spring 5 that urges the second link 4 clockwise with respect to the shaft fulcrum 1b is changed. It suddenly changes counterclockwise. Due to this abrupt change in the urging direction, the second link 4 rapidly rotates in the counterclockwise direction (the direction of arrow B in the figure) about the pivot point 1b. At the same time, as shown in FIG. 2B, the main link 2 which is connected to the second link 4 by the first link 3 is swung counterclockwise with respect to the shaft fulcrum 1a, and the main link 2 is rotated. The main contactor 100 of the switch, which is interlocked with the rotation, is put in the closed state as shown in FIG. 3 (the open state of the switch).

In the closed state of the switch shown in FIG. 3,
When a trip signal is sent due to occurrence of a ground fault or the like, the trip electromagnet 10 is excited. The movable iron core 10a of the tripping electromagnet 10 is attracted by the excitation, and one end of the latch arm 9 connected thereto is attracted around the shaft fulcrum 9b, and the latch arm 9 is urged clockwise with respect to the shaft fulcrum. Counterclockwise against the spring 11 (see FIG.
(A) It rotates in the direction of arrow D), and the roller 9a at the other end of the latch arm 9 rotates in the direction of arrow E in the drawing to catch the catch substrate 1.
The engagement is disengaged from the catch portion 1d. Since the catching substrate 1 is always provided with a biasing force in the clockwise direction (the direction of arrow F in the drawing) by the breaking spring 5, FIG.
As shown in, the catch substrate 1 quickly rotates in the clockwise direction (direction of arrow F in the drawing) around the shaft fulcrum 1a after being disengaged from the roller 9a. With the rotation of the catch substrate 1, as shown in FIG. 4B, the restriction groove 1 of the catch substrate 1
The main link 2 in which the pin 2a is engaged with c is rotated in the clockwise direction (in the direction of arrow G in the figure) around the pivot fulcrum 1a together with the catch substrate 1 according to the regulation, and the switch is interlocked with the rotation of the main link 2. As shown in FIG. 5, the main contactor 100 is turned off (automatic operation switch off state). Note that the tripping electromagnet 10 is of the instantaneous excitation type, the excitation is immediately released, the latch arm 9 is biased in the clockwise direction (the direction of arrow H in the drawing) by the latch spring 11, and the roller 9a at the other end rotates. It is in a state of being pressed against the outer periphery of the moved catch substrate 1.

When the switch is turned off by automatic operation,
When a closing signal is sent by automatic operation, the closing electromagnet 7
Is excited. As shown in FIG. 6 (A), the movable iron core 7a of the closing electromagnet 7 is attracted in the downward direction (the direction of the arrow I in the drawing) by the excitation, and when the connected connecting arm 8 is pulled down, it moves in the direction of the arrow I. The main link 2 engaging the pin 2b with the elongated hole 8b of the lowered connecting arm 8 is shown in FIG.
As shown in (B), the main contactor 1 of the switch, which rotates counterclockwise around the shaft fulcrum 1a and interlocks with the rotation of the main link 2.
Set 00 to OFF state from OFF state. On the other hand, due to the engagement between the pin 2a of the main link 2 and the restriction groove 1c, the catch substrate 1 also rotates together with the main link 2 in the counterclockwise direction (direction of arrow K in the figure) around the shaft fulcrum 1a and returns to the original position. The roller 9a of the latch arm 9 pressed against the outer periphery of the catch substrate 1 at that point engages with the catch portion 1d, and the position of the catch substrate 1 is held as shown in FIG. After the switch is turned on, the energizing electromagnet 7 is de-energized, de-excited, and the movable iron core 7a is pulled back by the bias of a spring (not shown) and pushes up the connecting arm 8. The pin 2b of the main link 2 only changes the relative position within the elongated hole 8b of the connecting arm 8 and the main link 2 itself does not move, and the operation of the switch is not affected.

(Second Embodiment of the Present Invention) FIG. 7 is a schematic configuration diagram of a switch operating mechanism according to a second embodiment of the present invention, and FIG. 8 is an operation of the embodiment shown in FIG. The partial cross section figure seen from the lower part in a mechanism is shown. In the figure, the operating mechanism of the switch according to the present embodiment is similar to the operating mechanism shown in FIG. 1, and includes the catch board 1, the main link 2, the first link 3, the second link 4, and the breaking spring 5. , An operating handle 6, a connecting arm 8, a closing electromagnet 7, a latch arm 9, a tripping electromagnet 10 and a latch spring 11 are provided in common, and in addition to this configuration, the catch substrate 1 and the main link 2 are respectively pivotally supported. Auxiliary link 20 in which a substantially triangular first corner portion is rotatably rotatably supported on the pivot fulcrum 2a.
And the elongated hole 1e formed in the catch substrate 1 by the pin 20a at the second corner of the substantially triangular shape of the auxiliary link 20.
One end of which is rotatably supported by the first and second
A third link 30 whose other end is rotatably supported on the shaft fulcrum 3a of each of the links 3, 4 and a substantially triangular third corner portion of the auxiliary link 20 which is rotatably supported by a pin 20b. The fourth link 40 having one end pivotally supported, and the fourth link 4
The other end of 0 is rotatably and slidably supported in the long hole 60a by the pin 40b, and the other end of the blocking spring 5 is supported, and the handle shaft fulcrum 6a is centered in accordance with the operation of the operation handle 6. And a handle arm 60 that responds to.

Movable iron core 10a of the tripping electromagnet 10
A hook-shaped link 10b is swingably supported by the hook, and is engaged with the other end of the latch arm 9 via the link 10b. A spring 8c is disposed on the lower end side of the connecting arm 8, and the elastic force of the spring 8c urges the connecting arm 8 downward (toward the closing electromagnet 7).

Next, the operation of this embodiment based on the above configuration will be described. Each operation of closing and opening by the manual operation and the automatic operation operates in the same manner as in the first embodiment, and the auxiliary link 20, the third link 30, and the fourth link during the opening operation in the manual operation and the automatic operation. By the interaction of 40, each of the first and second links 3,
4 acts to smoothly bend the connection engagement portion.

That is, when the operation handle 6 is rotated in the direction of the arrow L in FIG. 7 when the main contactor 100 of the switch is in the closed state, the handle arm 60 is shared with the operation handle 6 along with this rotation. Same L centered around the fulcrum 6a
Rotate in the direction. The rotation of the handle arm 60 pulls up the fourth link 40 connected through the pin 40b in the elongated hole 60a, and the auxiliary link 20 connected to one end of the fourth link 40 is moved in the direction of arrow M in the figure. Turn to.

With the rotation of the auxiliary link 20 in the direction of arrow M, the third link 30 is raised in the direction of arrow N shown in the drawing, and by the rise in the direction of arrow N, the first and second links 3, It is possible to forcibly bend the first and second links 3, 4 into a substantially V-shape by pushing the common shaft fulcrum 3a upward.

By forcibly bending the first and second links 3 and 4, the main link 2 connected to one end of the first link 3 is moved in the direction of the arrow in the figure around the shaft fulcrum 1a. The main contact 100 of the switch can be opened in accordance with the rotation of the main link 2 by rotating in the O direction. As described above, when the opening operation is performed by the trip operation due to various accidents, and when the opening operation is performed by the manual operation or the automatic operation, the first and second links 3, 4 are forcibly bent. By doing so, the main contactor 100 of the switch can be smoothly and surely opened.

Although the trip electromagnet 10 is used as a drive source for tripping the engagement between the catch substrate 1 and the latch arm 9 in each of the above-described embodiments, the trip electromagnet 10 is used as an actuator such as a motor drive or hydraulic pressure. It is also possible to configure a drive source that is removed. In addition, in each of the above-described embodiments, the main link 2 that closes and opens the main contactor 100 of the switch.
Although the rotation is controlled by the closing electromagnet 7 via the connecting arm 8, the closing electromagnet 7 may be replaced by an actuator such as a motor drive or a hydraulic pressure.

[0030]

As described above, in the present invention, the operation handle is operated to put the main contactor of the switch through the first and second links, the catch substrate, the main link and the connecting arm. After that, even when the trip drive means releases the engagement between the latch arm and the catch board in this state and the trip operation causes an open state, the closing drive means causes the main arm of the switch to be opened through the connecting arm. Since the contactor can be put into the closing state, there is an effect that the closing operation can be performed by automatically performing the reset operation from the opened state by the trip operation by the automatic operation. Also,
In the present invention, the auxiliary link and the third link bend the first and second links about the common shaft fulcrum, so that the opening / closing operation of the switch during manual operation, automatic operation, and trip operation. The main contactor can be smoothly and surely opened.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an operating mechanism of a switch according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a closing operation in a manual operation of the operating mechanism of the switch according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of a closing completion state of the switch operating mechanism according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram of an automatic operation open state of the operation mechanism of the switch according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram of an opening completed state of the operating mechanism of the switch according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram of an automatic operation closing state of the operation mechanism of the switch according to the first embodiment of the present invention.

FIG. 7 is a schematic configuration diagram of an operation mechanism of a switch according to a second embodiment of the present invention.

8 is a partial cross-sectional view of the operating mechanism of the switch shown in FIG. 7 as seen from below.

FIG. 9 is a side view of a conventional switch operating mechanism in a closed state.

FIG. 10 is a side view of a conventional switch operating mechanism in an open state.

FIG. 11 is an external front view of a general trip type high voltage AC load switch.

[Explanation of symbols]

 1 Catch board 1a, 1b Shaft fulcrum 1c Restriction groove 1d Catch part 1e Long hole 2 Main link 2a, 2b, 8a, 20a, 20b, 40b Pin 3 First link 4 Second link 10b, 20, 30, 40 link 3a Axial fulcrum 5 Breaking spring 6 Operation handle 6a Handle axial fulcrum 7 Electromagnet for input 7a Movable iron core 8 Connecting arm 8b Long hole 8c Spring 9 Latch arm 9a Roller 10 Electromagnet for tripping 10a Movable iron core 11 Latch spring 20 Auxiliary link 60 Handle arm 60a Slot 100 Main contact 101 Main shaft 102 Main claw 103 Catch shaft 104 Catch board 104a, 114b Catch part 107 First shaft 108 First arm 113 Second shaft 114 Second arm 115, 116, 127 Reset spring 118 , 130 Electromagnet 123 Spring 125 Latch piece 129 Tripping plate

Claims (2)

[Claims] 1. A catch substrate rotatably supported on a frame of a switch, and a catch substrate rotatably supported coaxially with the catch substrate for interlocking a main contactor of the switch for opening and closing operations. A main link to be carried out, and a first link rotatably attached at one end to a part of the main link.
A second link, one end of which is pivotally attached to the other end of the first link and the other end of which is pivotally attached to an axial fulcrum of the catch substrate, and which is arranged to face the main link. A shutoff spring whose one end is locked to a shaft fulcrum common to the first link and the second link, and the other end of the cutoff spring is locked to pivotally support the frame of the switch. One operating handle for moving the other end position of the breaking spring to one side or the other side of the center line of the second link, and one end of the main link is connected to the other end of the switch. It has a connecting arm which is connected to the main contactor and whose other end moves in accordance with the rotation of the main link, and movable means which is rotatably connected to one end of the connecting arm. Open and close by rotating the link and connecting to the other end of the connecting arm Drive means for putting the main contactor of the switch into a closed state, and a latch arm rotatably supported by the frame of the switch for holding the catch substrate at one end to hold the position of the catch substrate. And a movable means rotatably connected to the other end of the latch arm, and moves the latch arm in a predetermined direction to separate the one end side from the catch substrate and release the catch substrate from the holding state. An operating mechanism for a switch, comprising: a tripping drive means. 2. The operating mechanism for a switch according to claim 1, wherein one end is rotatably supported coaxially with the main link, and the auxiliary link rotates with the rotation of the operation handle. A third link, one end of which is rotatably supported by the other end of the auxiliary link, and the other end of which is supported by a common shaft fulcrum of the first and second links. The operation mechanism of the switch, characterized in that the third link is moved by the rotation of the first link to bend the first and second links around a common pivot point.