JP2000340074A - Operation device for manual switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operation device for a manual switch capable of forcibly disconnecting the welded part of a fixed contact to a moving contact without causing any trouble by the rotative operation of a handle shaft. SOLUTION: While the opening operation of a moving contact 3x with respect to a fixed contact 2x of a manual switch 1 is being carried out by driving a toggle mechanism 10 by the rotative operation of a handle shaft 9, when the moving contact 3x is not disconnected from the fixed contact due to the stored-e energy force of the toggle mechanism 10 even if the toggle mechanism 10 exceeds its dead point, a forcibly disconnecting link mechanism 27 for imparting disconnecting force by pressing a part of the toggle mechanism 10 is connected to the toggle mechanism 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual switch operating device used for operating a manual switch.

[0002]

2. Description of the Related Art In a manual switch, there is a case where a movable contact is welded to a fixed contact and an opening operation cannot be performed.
In order to prevent this, conventional operating devices for manual switches have a structure in which an impact force is applied to the welded portion by a hammer effect to forcibly separate the welded portion between the fixed contact and the movable contact. was there. In this manual switch operating device, at the point where one of the mutually connected arms and the other arm in the middle of the toggle mechanism that transmits the operating force are connected by a movable connection shaft, one of these arms is connected via a long hole. When the handle is turned, the movable connection shaft starts moving from one end of the long hole, and the welded portion is forcibly cut off by an impact when it hits the other end of the long hole.

[0003]

However, in the operating device for a manual switch having such a structure, it is necessary to increase the stroke of the operating device by the length of the long hole. There is a problem that causes an increase in the size of the device.

An object of the present invention is to provide an operating device for a manual switch which can forcibly separate a welded portion between a fixed contact and a movable contact by rotating a handle shaft. .

Another object of the present invention is to make effective use of an empty space to prevent an increase in the size of the device and to forcibly separate a welded portion between a fixed contact and a movable contact by rotating a handle shaft. An object of the present invention is to provide an operation device for a manual switch that can be operated without any trouble.

[0006]

SUMMARY OF THE INVENTION According to the present invention, the operation of opening a movable contact with respect to a fixed contact of a manual switch is performed by driving a toggle mechanism by rotating a handle shaft to accumulate a toggle spring of the toggle mechanism. An object of the present invention is to improve an operation device for a manual switch for releasing a force to forcibly rotate a drive shaft of the manual switch in an opening direction to separate a movable contact from a fixed contact.

In the operating device for a manual switch according to the present invention, even if the toggle mechanism exceeds the dead point while the toggle mechanism is performing the opening operation, the movable contactor is charged by the energy stored in the toggle mechanism. Is not separated from the fixed contact,
A forcible trip link mechanism for pressing a part of the toggle mechanism to apply a separating force is connected to the toggle mechanism.

[0008] When such a forcible trip link mechanism is connected to the toggle mechanism, the force for operating the handle is reduced.
It is used as a force for directly separating the welded portion between the fixed contact and the movable contact, and the welded portion can be separated.

[0009] In the present invention, the toggle mechanism is configured such that an intermediate portion of the handle arm is integrally connected to the outer periphery of the handle shaft so as to rotate together with the handle shaft, and the toggle arm is provided at another position in the longitudinal direction of the outer periphery of the handle shaft. A portion near the one end of the toggle arm is fitted and rotatably supported, and a slant chamfer is formed on the side surface of the portion near the one end of the toggle arm. A stopper is provided so that the side of the toggle arm that is continuous with the slanted chamfered part is in contact with the handle and the contact is cut off, and one end of the spring support arm is located near the other end of the toggle arm. A portion provided with a long hole at the other end of the spring support arm is rotatably connected with a movable connection shaft passing through the long hole. One end of the output arm of the toggle mechanism is connected to one end of the handle shaft on one end of the handle arm. A fixed connection shaft is disposed between the handle shaft and the drive shaft, and a movable connection shaft is provided between the movable connection shaft and the handle shaft near the other end of the toggle arm. One end of one link arm is rotatably connected, one end of a second link arm is rotatably connected to the outer periphery of the fixed connection shaft, and one end of a third link arm is movable to the other end of the output arm. It is preferable that the first, second, and third link arms are rotatably connected by a connection shaft, and the other ends of the first, second, and third link arms are rotatably connected by a common movable connection shaft.

[0010] In the present invention, the forcible trip link mechanism is configured such that one end of the first forcible trip link arm is rotatably connected to the other end of the handle arm by a movable connecting shaft.
One end of a second forcible trip link arm is rotatably connected to the movable connecting shaft at the other end of the output arm, and the other ends of the first and second forcibly releasing link arms are rotatable relative to each other on the movable connecting shaft. When the toggle mechanism is in the middle of the opening operation while the toggle mechanism is performing the opening operation, the movable force is generated by the energy stored in the toggle mechanism. It is preferable that a pressing portion is provided for pressing the common movable connecting shaft of the toggle mechanism to give a separating force when the child is not separated from the fixed contact.

With this configuration, it is possible to easily make the welded portion of the fixed contact and the movable contact forcibly separated, while effectively utilizing the empty space and preventing the device from being enlarged.

In the present invention, the movable connecting shaft means the one where the position of the connecting shaft moves together with the movement of the connected partner, and the fixed connecting shaft means that the existing position of the connecting shaft moves. It does not mean that the axis itself rotates around its axis or not.

[0013]

1 and 2 show an example of an embodiment of a manual switch operating device according to the present invention. FIG. 1 is a perspective view of the manual switch operating device of the present embodiment, and FIG. 2 is a cross-sectional view showing a state in which a contact with a handle is included in the operating device for a manual switch of the present example.

In the operating device for a manual switch of the present embodiment,
The manual switch 1 comprises three-phase movable contacts 3x, 3 with respect to three-phase fixed contacts 2x, 2y, 2z of X, Y, Z.
Opening operations of y and 3z are performed by operating arms 5ax, 5ay, and 5az made of metal, the base ends of which are integrally fixed to the drive shaft 4.
The movable contacts 3x, 3y, and 5bz are insulated from the distal ends of the operation arms 5ax, 5ay, and 5az by the insulating operation arms 5bx, 5by, and 5bz whose base ends are pivotally connected by a movable connection shaft (not shown).
The center of the movable contact 3x, 3y, 3z is transmitted to the intermediate portion of 3z via the movable connecting shafts 6x, 6y, 6z, and the distal end side of the movable contact 3x, 3y, 3z around the pivotal connecting shafts 7x, 7y, 7z in FIG. This operation is performed by turning it upward. The movable connection shafts 6x, 6y, and 6z are paired movable contacts 3x, 3
A bolt 6a penetrating through the y, 3z and the insulating operation arms 5bx, 5by, 5bz, a nut 6b screwed to the bolt 6a, and fitted to the bolt 6a on the outer surface of the pair of movable contacts 3x, 3y, 3z. A coil spring 6 attached to the pair of movable contacts 3x, 3y, 3z for urging in the closing direction.
c. Pivot connection shafts 7x, 7y, 7z
FIG. 2 shows the base ends of the pair of movable contacts 3x, 3y, 3z and FIG.
, A nut 7b screwed to the bolt 7a, and a pair of movable contacts 3x, 3y, 3z.
Is formed by a coil spring 7c fitted on a bolt 7a on the outer surface thereof and biasing these paired movable contacts 3x, 3y, 3z in a closing direction. Movable contacts 3x, 3
Each pair constituting y and 3z has a structure curved inwardly and convexly, so that the pair can be easily inserted into the corresponding fixed contact 2x, 2y or 2z.

A toggle mechanism 10 is provided for rotating the drive shaft 4 by expanding a small force for turning the handle shaft 9. The position of the handle shaft 9 is fixed.

The toggle mechanism 10 has a pair of handle arms 11 having an intermediate portion integrally connected to the outer periphery of the handle shaft 9 and rotating together with the handle shaft 9. On one side of the handle arm 11, inclined surfaces 11a and 11b of equal legs are provided in a trapezoidal shape on the left and right sides of the central side surface 11c. Further, at another position in the longitudinal direction of the outer periphery of the handle shaft 9 (position on both sides sandwiching the pair of handle arms 11), a portion near one end of the pair of toggle arms 12 is fitted and rotatably supported. ing. An oblique chamfered portion 12a is formed on a side surface of a portion near one end of the toggle arm 12 so as to be obliquely chamfered. A stopper 13 is fixed to a fixing member (not shown) at a position facing the oblique chamfered portion 12a and the side surface portion 12b of the toggle arm 12. This stopper 13 has
The oblique chamfered portion 12a of the toggle arm 12 comes into contact with the handle with contact and the handle with contact, and the side surface 12b of the toggle arm 12 with the handle with contact off. In addition, the inclined surface 11b of the handle arm 11 comes into contact with the stopper 13 when the handle is in the contact state.
In the state with the handle turning contact, the inclined surface 11a of the handle arm 11 is on the verge of contact, and in the state with the handle cutting contact, the inclined surface 11a of the handle arm 11 is in contact. One end of a spring support arm 14 is rotatably connected to a portion near the other end of one toggle arm 12 by a movable connection shaft 15. One end of each handle arm 11 is rotatably connected to a portion provided with the elongated hole 16 at the other end of the spring support arm 14 by a movable connection shaft 17 passing through the elongated hole 16. A toggle spring 18, which is energized at one end of the handle arm 11, is fitted and supported on the outer periphery of the spring support arm. A part of the outer periphery of the drive shaft 4 is provided with a pair of output arms 19 of the toggle mechanism 10.
Is connected so as to rotate together with the drive shaft 4. A fixed connecting shaft 2 is provided between the handle shaft 9 and the driving shaft 4.
0 is arranged. One end of a pair of first link arms 22 is rotatably connected by a movable connection shaft 21 between the movable connection shaft 15 and the handle shaft 9 at a portion near the other end of each toggle arm 12. On the outer periphery of the fixed connection shaft 20,
One ends of the pair of second link arms 23 are rotatably connected. One end of a third link arm 24 is rotatably connected to the other end of the pair of output arms 19 by a movable connection shaft 25. First, second and third link arms 2
The other ends of 2, 23 and 24 are rotatably connected by a common movable connection shaft 26.

While the toggle mechanism 10 is performing an opening operation, the toggle mechanism 1 has
When the movable contacts 3x, 3y, 3z are not separated from the fixed contacts 2x, 2y, 2z by the accumulated force of the toggle mechanism 10 even when 0 exceeds the dead center, a part of the toggle mechanism 10 is pressed. Release link mechanism 27 for applying a separating force
Are connected. Here, the dead point of the toggle mechanism 10 includes the center of the handle shaft 9, the center of the movable connection shaft 17,
This is a position where the center of the movable connection shaft 15 is aligned in a straight line.

The forcible trip link mechanism 27 includes a first
One end of the forcible trip link arm 28 is rotatably connected to the other end of the handle arm 11 by a movable connection shaft 29,
One end of a pair of second forcibly releasing link arms 30 is rotatably connected to a movable connecting shaft 25 at the other end of the output arm 19, and these first and second forcibly releasing link arms 2 are connected.
The other end of each of the movable link shafts 8 and 30 is rotatably connected to each other by a movable connecting shaft 31, and a part of the second forcible trip link arm 30 is opened while the toggle mechanism 10 is performing the opening operation. Even if the mechanism 10 exceeds the dead center, the movable contacts 3x, 3y, 3z are fixed to the fixed contacts 2x, 2 by the accumulating force of the toggle mechanism 10.
y, 2z, the toggle mechanism 10
Is provided with a pressing portion 30a that presses a part of the member to apply a separating force.

The toggle mechanism 10 having such a forcible trip link mechanism 27 is housed in a case 33.

The three-phase fixed contacts 2x, 2y, 2z include:
The cables 34x, 34y, 34z of the respective phases are connected. The three-phase movable contacts 3x, 3y, 3z include:
Cables 35x, 35y, 35z of each phase are connected to each.

Next, the operation of the toggle mechanism 10 provided with the above-mentioned forcible trip link mechanism 27 will be described with reference to FIG. This will be described with reference to FIG. Here, FIG. 3 is a cross-sectional view showing a state where a steering wheel is turned off, and FIG. 4 is a cross-sectional view showing a state where a steering wheel is turned off.

In the state with the contacts with the handle shown in FIG. 2, the toggle mechanism 10 and the forcible trip link mechanism 27 are in the illustrated state. In this state, the toggle arm 1
The two oblique chamfers 12a are in contact with the stopper 13, and the inclined surface 11b of the handle arm 11 is in contact with the stopper 13.

In this state, when the handle shaft 9 is turned counterclockwise in FIG. 2, the pair of movable contacts 3x, 3y and 3z are not welded to the fixed contacts 2x, 2y and 2z. The arm 11 rotates together in a counterclockwise direction, and a spring supporting arm 14 connected to the handle arm 11 by a movable connecting shaft 17 is provided around the movable connecting shaft 15 as shown in FIG.
3, the toggle spring 18 is rotated clockwise as shown in FIG. 3, and the toggle spring 18 is pushed and compressed by the end of the movable connecting shaft 17 of the handle arm 11, and enters a state of energy accumulation. In this process, the center of the handle shaft 9 and the center of the movable connection shaft 17
When the center of the movable connection shaft 17 exceeds the position of the dead center where the center of the movable connection shaft 15 is aligned in a straight line, the toggle spring 18 becomes free and presses the handle arm 11, and the handle arm 11 is turned counterclockwise. Forcibly rotate. Due to the forcible counterclockwise rotation of the handle arm 11, the inclined surface 11 a comes into contact with the stopper 13. The clockwise rotation of the toggle arm 12 about the handle shaft 9 causes the first link arm 22 to be pulled leftward. With this operation, the movable connection shaft 25 makes a forcible rotational movement in the circular direction around the drive shaft 4 in the clockwise direction, and the output arm 19 is forcibly rotated in the clockwise direction together with the drive shaft 4.
Due to the clockwise forcible rotation of the drive shaft 4, the insulating operation arms 5bx, 5by, 5bz rotate clockwise, and the movable contacts 3x, 3y, 3z are pivotally connected at their base ends 7x.
And each fixed contact 2 is rotated upward about
Exit from x, 2y, 2z.

When the handle shaft 9 is turned counterclockwise in FIG. 2, the pair of movable contacts 3x, 3y, 3z
When they are welded to x, 2y, and 2z, the position of the dead center where the center of the handle shaft 9, the center of the movable connection shaft 17, and the center of the movable connection shaft 15 are aligned in a straight line as shown in FIG. Does not proceed further even if the center of the movable connecting shaft 17 exceeds In this state, the inclined surface 11a of the handle arm 11 is on the verge of contact with the stopper 13, and in this state, the inclined chamfered portion 12a of the toggle arm 12 remains in contact with the stopper 13, and the toggle arm 12
There is no change of direction. Further, in this state, the counterclockwise rotation of the handle arm 11 causes the spring support arm 14 to rotate clockwise from the state shown in FIG. 2 around the movable connection shaft 15 as shown in FIG. 11 is pushed and compressed at the end of the movable connecting shaft 17 and is in a state of energy accumulation.

In this state, the first forcible trip link arm 28 of the forcible trip link mechanism 27 is rotated by the counterclockwise rotation of the handle arm 11, as shown in FIG.
Is pulled upward, whereby the second forcibly releasing link arm 30 is rotated counterclockwise about the movable connecting shaft 25, and the second forcibly releasing link arm 3 is rotated.
The middle pressing portion 30a in the longitudinal direction of 0 hits the common movable connection shaft 26, and the common movable connection shaft 26 is forcibly pressed leftward in FIG.

As described above, when the pressing portion 30a forcibly presses the common movable connecting shaft 26, the first link arm 2
The toggle arm 12 is pressed clockwise via the movable connection shaft 2 and the movable connection shaft 21, and the movable connection shaft 15 is also moved clockwise together with the toggle arm 12, whereby the spring support arm 14 relatively moves around the movable connection shaft 15. Turn clockwise, toggle spring 18
Becomes free and presses the handle arm 11 to force the handle arm 11 to rotate counterclockwise. Due to the forced counterclockwise rotation of the handle arm 11,
The inclined surface 11a contacts the stopper 13. The clockwise rotation of the toggle arm 12 about the handle shaft 9 causes the first link arm 22 to be pulled leftward. With this operation, the movable connection shaft 25 makes a forcible rotational movement in the circular direction around the drive shaft 4 in the clockwise direction, and the output arm 19 is forcibly rotated in the clockwise direction together with the drive shaft 4. The clockwise forcible rotation of the drive shaft 4 causes the insulated operation arms 5bx, 5bx, 5bz to rotate clockwise, and the movable contacts 3x, 3y, 3z to move their base pivot connection shafts 7x to 7z. It rotates upward as a center and exits from each fixed contact 2x, 2y, 2z.

When the forcible trip link mechanism 27 is provided in this manner, even if the paired movable contacts 3x, 3y, 3z are welded to the fixed contacts 2x, 2y, 2z, the force for operating the handle can be used. The welded portions of the fixed contacts 2x, 2y, 2z and the movable contacts 3x, 3y, 3z can be easily separated.

[0028]

In the operating device for a manual switch according to the present invention, since the forcible trip link mechanism is connected to the toggle mechanism, the force for operating the handle is reduced by the welding portion between the fixed contact and the movable contact. Is used as a force for directly separating the welded portion, so that the welded portion can be easily separated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a manual switch operating device according to the present invention.

FIG. 2 is a cross-sectional view showing a state in which a contact with a handle is included in the operating device for a manual switch of the present example.

FIG. 3 is a cross-sectional view showing a state in which a steering wheel turning contact is provided in the manual switch operating device of the present embodiment.

FIG. 4 is a cross-sectional view showing a state where a handle is turned off and a contact is turned off in the manual switch operating device of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manual switch 2x, 2y, 2z Fixed contact 3x, 3y, 3z Movable contact 4 Drive shaft 5ax, 5ay, 5az Operation arm 5bx, 5by, 5bz Insulation operation arm 6a Bolt 6b Nut 6c Coil spring 7x, 7y, 7z Supporting connection shaft 7a Bolt 7b Nut 7c Coil spring 9 Handle shaft 10 Toggle mechanism 11 Handle arm 11 Handle arm 11a, 11b Inclined surface 12 Toggle arm 12a Bevel chamfered portion 12b Side surface portion 12c Central side surface 13 Stopper 14 Spring support arm 15 Movable connection shaft 16 Slot 17 Movable connecting shaft 18 Toggle spring 19 Output arm 20 Fixed connecting shaft 21 Movable connecting shaft 22 First link arm 23 Second link arm 24 Third link arm 25 Movable connecting shaft 26 Common movable connecting shaft 27 Forced pull Remove Link mechanism 28 first forcible release link arm 29 movable connection shaft 30 second forcible release link arm 30a pressing portion 31 movable connection shaft 33 case 34x, 34y, 34z cable 35x, 35y, 35z cable

Claims (3)

[Claims] An opening operation of a movable contact with respect to a fixed contact of a manual switch is performed by driving a toggle mechanism by rotating a handle shaft to release the stored energy of a toggle spring of the toggle mechanism. An operating device for a manual switch for forcibly rotating a drive shaft of a switch in an opening direction to separate the movable contact from the fixed contact, wherein the toggle mechanism performs an opening operation while the toggle mechanism is performing an opening operation. When the movable contact is not separated from the fixed contact due to the accumulated force of the toggle mechanism even when the mechanism exceeds the dead center, a forcible trip link that presses a part of the toggle mechanism to apply a separating force. An operating device for a manual switch, wherein a mechanism is connected to the toggle mechanism. 2. The toggle mechanism according to claim 1, wherein an intermediate portion of a handle arm is integrally connected to an outer periphery of the handle shaft so as to rotate together with the handle shaft, and at another position in a longitudinal direction of the outer periphery of the handle shaft. A part near the one end of the toggle arm is fitted and rotatably supported, and a slanted chamfer is formed on the side surface of the part near the one end of the toggle arm. A stopper is provided so that the side surface of the toggle arm that is continuous with the slanted chamfer in contact with the slanted chamfer while the handle is turned off and the contact is cut off is provided at a portion near the other end of the toggle arm. One end of the spring support arm is rotatably connected by a movable connection shaft, and a portion provided with a long hole on the other end side of the spring support arm is a movable connection passing through the long hole. One end of the handle arm is rotatably connected to a shaft, a toggle spring that is energized at one end of the handle arm is supported on the outer periphery of the spring support arm, and a part of the outer periphery of the drive shaft is One end of an output arm of the toggle mechanism is connected so as to rotate together with the drive shaft, and a fixed connection shaft is disposed between the handle shaft and the drive shaft, and a portion near the other end of the toggle arm is provided. One end of a first link arm is rotatably connected between the movable connection shaft and the handle shaft by a movable connection shaft,
One end of a second link arm is rotatably connected to the outer periphery of the fixed connection shaft, and one end of a third link arm is rotatably connected to the other end of the output arm by a movable connection shaft. The operating device for a manual switch according to claim 1, wherein the other ends of the first, second and third link arms are rotatably connected by a common movable connecting shaft. 3. The forcible trip link mechanism, wherein one end of a first forcible trip link arm is rotatably connected to the other end of the handle arm by a movable connecting shaft, and the other end of the output arm is movable. One end of a second forcible trip link arm is rotatably connected to the connection shaft, and
The other end of the forcible trip link arm is rotatably connected to each other by a movable connection shaft, and the toggle mechanism is performing an opening operation on a part of the second forcible trip link arm. When the movable contact is not separated from the fixed contact by the accumulating force of the toggle mechanism even when the toggle mechanism exceeds the dead center, the common movable connecting shaft of the toggle mechanism is pressed to separate the movable contact. The operating device for a manual switch according to claim 2, further comprising a pressing portion that provides the following.