JPH0316188Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of an operating mechanism for manually closing and closing a switch.

(Prior art) An example of the operating mechanism of a conventional switch is shown in Fig. 9 and Fig. 1.
Shown in Figure 0. The operating mechanism of this switch includes an operating lever 42 and a closing lever 43 that are pivoted to a frame 41, and are connected by an operating link 44, and the closing lever 43 is rotated in conjunction with the rotating operation of the operating lever 42. The switch is made movable, and the switch is opened and closed in conjunction with the rotation of the closing lever 43.

That is, in this operating mechanism, when the operating lever 42 is rotated counterclockwise using the handle H in the open state of the switch shown in FIG. 43
Push the pin 45 to rotate the input lever 43 counterclockwise. Accordingly, the biasing link 46 pivotally connected to the closing lever 43 rotates clockwise while storing energy in the biasing spring 47.
The spring 47 is released at the position indicated by the imaginary line in FIG. 9, which coincides with the biasing direction of the spring 47, and the spring force causes the closing lever 43 to rotate counterclockwise at once via the biasing link 46. During the rotation of the closing lever 43, the pin 48 comes into contact with the left side edge of the link 49, and then the lever 51 is pushed down against the biasing force of the spring 52 while the link 49 is rotated counterclockwise around the pivot 50. When the link 49 and the lever 51 are aligned in a straight line as shown in FIG. 10, the movable contact of the switch (not shown) connected to the lever 51 completes the closing operation. From this state, the operating lever 42
When the is rotated clockwise, during the rotation, the operating link 44 pivotally connected to this pulls the pin 45 of the input lever 43, causing the input lever 43 to rotate clockwise. Accordingly, the biasing link 46 pivotally connected to the closing lever 43 rotates clockwise while storing energy in the biasing spring 47, and this rotation coincides with the biasing direction of the biasing spring 47 as shown in FIG. The spring 47 is released at the position of the imaginary line, and the spring force causes the closing lever 43 to rotate clockwise at once via the urging link 46. While the closing lever 43 is rotating, the link 49 has the pin 45 in an upright state.
The lever 51 is brought into contact with the right side edge of the link 49 and the lever 51, and the lever 51 is pulled up by the spring force of the springs 47 and 52, thereby interrupting the movable contact of a switch (not shown) connected thereto. It is something that makes you

(Problems to be Solved by the Invention) In the conventional switch operation mechanism described above, the operation lever 4
The distance it moves up and down in conjunction with the rotation operation in step 2 is relatively long, so the movement during this time is slow.
The remaining small stroke portion is a quick-on/quick-off operation by the spring 47, and there is a problem in that the quick-on/quick-off effect cannot be obtained over the entire stroke, and the shutoff stroke is not used effectively. Also,
In the conventional operating mechanism, the lever 51 and the entire mechanism are pushed upward by the spring 52 in order to maintain the movable contact of the switch in the disconnected state at all times. For this reason, there is a problem that the closing operation speed in the opposite direction is slow, and the spring 4
Since the spring forces of spring 7 and spring 52 are simultaneously applied in the direction of the disconnection operation, the opening speed is too high and the shock applied to the operator and mechanism is large.Also, since the link 49 is free in the disconnection state, the movable contactor There are also problems such as large vertical vibrations (damping) and the risk of re-throwing.

The present invention solves the above conventional problems, has a constant opening/closing speed regardless of the speed of manual operation, has no damping when shutting off, does not put pressure on the hand during manual operation, and has a relatively simple structure. The present invention aims to provide a switch operating mechanism that is simple and has a small number of parts.

(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, in the present invention, an operating lever 12 and a closing lever 13 are pivotally attached to a frame 11, and the two are connected by an operating link 14. , the input lever 13 is rotatable in conjunction with the rotation operation of the operation lever 12, and this input lever 1
In the device in which the switch is closed and opened in conjunction with the rotation of 3, the closing lever 13 has an arc-shaped elongated hole 13.
a, and an elongated hole 14a in the extending direction of the operating link 14, and both of these elongated holes 13
The input lever 13 and the operation link 14 are pivotally connected to each other so as to be relatively movable by means of a pivot pin 15 that slidably passes through the input lever 13 and the operation link 14, and one end of a cam lever 16 is pivoted coaxially with the input lever 13. The pivot pin 15 is fixed to the other end of the pivot pin 16.
One end of a biasing link 17 is pivotally connected to the side of the frame 1, and a spring receiving pin 18 is provided at the other end of the biasing link 17.
The cam lever 16 is slidably supported in a long hole 11a formed on the cam lever 16 toward the pivot 19, and is biased toward the pivot 19 by a spring 20. When arranged in a straight line, the cam lever 16 crosses the dead center and rotates in the opposite direction before and after the dead center, and the middle part of the clutch lever 21 is pivoted to the frame 11, and the clutch lever 21 is rotatably biased so that one end of the input lever 21 is always slidably pressed into contact with the side edge of the input lever 13, and when in the cut-off state, it engages with the engaging portion 13b on the side edge of the input lever 13 and rotates in the input direction. The cam lever 16 is configured to be pressed against the side edge of the cam lever 16 in the middle of its rotation during the closing operation so as to be rotated and disengaged from the engaging portion 13b of the closing lever 13.

(Function) In the operating mechanism of the switch of the present invention, when the operating lever 12 is rotated when the switch is in the cutoff state, the operating link 14 connects the pivot pin 15 to the elongated hole 13.
a and rotate the cam lever 16 at the same time. As the cam lever 16 rotates, it pushes down the biasing link 17 and widens the mutual angle while accumulating the force in the spring 20. When arranged in a straight line, the biasing link 17 coincides with the biasing direction of the spring 20. Up to this point, the input lever 13 does not move. Furthermore, cam lever 1
6 rotates, the clutch lever 21 whose end edge engages the engaging portion 13b of the closing lever 13
At the same time, the linear alignment between the cam lever 16 and the biasing link 17 is disrupted, the spring 20 is released, and the biasing link 17 rises due to the spring force. This causes the cam lever 16 and closing lever 13 to rotate instantaneously, and in conjunction with this, the switch is closed. To shut off the switch, rotate the operating lever 12 in the opposite direction, and the pivot pin 15 will engage the operating link 1.
4 and descends along the elongated hole 13a, the cam lever 16 rotates, presses down the urging link 17 and stores the force in the spring 20, and the cam lever 16 and the urging link 17 are aligned in a straight line. After aligning with the biasing direction of the spring 20, the spring 20 passes the dead center and is released, causing the cam lever 16 to instantly rotate together with the closing lever 13 in the blocking operation direction, and in conjunction with this rotation, the switch is activated. make it cut off. The shutoff operation is performed only by the spring force of the spring 20, and no force such as a shutoff spring is applied to maintain the switch in the shutoff state, so the shutoff operation is not performed at an excessive speed. In this way, the entire stroke of the closing and shutting operations is performed by the spring force of the spring 20, so that the quick-on and quick-closing operations are performed regardless of the manual operation speed of the operating lever 12. In the closing state, the closing lever 13 is held down by the spring 20, so that it does not easily open due to unexpected external force. Further, while the closing lever 13 is rotating, the tip of the clutch lever 21 slides relative to the edge of the closing lever 13, and when the closing lever 13 has completed its rotation for the blocking operation, it engages with the engaging portion 13b. together to prevent dumping.

(Embodiment) An embodiment of the present invention is shown in FIGS. 1 to 8.
Figure 1 is a perspective view of the operating mechanism, Figure 2 is a front view with one frame cut away, Figure 3 is a rear view,
FIG. 4 is a bottom view, and FIGS. 5 to 8 are schematic front views showing the process of operation.

1 to 8, the operating lever 12 has one end pivotally attached to the frame 11 by a shaft 22, and has a protruding piece 12a on which a handle H is attached to the intermediate portion. One end of an operating link 14 is pivotally connected to the other end of the operating lever 12 by a pin 23. The operation link 14 has a long hole 14a extending in the direction of extension thereof at the other end.

The input lever 13 has a generally fan-shaped shape, and is pivotally connected to the frame 11 at one end along with the cam lever 16 via a pivot 19. The closing lever 13 has an arc-shaped long hole 13a centered on the pivot 19, and this long hole 13a and the long hole 1 on the operation link 14 are connected to each other.
A pivot pin 15 is slidably inserted into the opening 4a, and thereby the closing lever 13 and the operation link 14 are connected to each other so as to be relatively movable within the range of the elongated holes 13a and 14a. The end of the pivot pin 15 is fixed to a cam lever 16, and the cam lever 16 is rotatable relative to the input lever 13 around the pivot shaft 19 within the range of the circular arc-shaped elongated hole 13a.

A lever 27 connected to the movable contact 32 of the switch is pivotally attached to the other end of the closing lever 13 by a pin 28. This lever 27 is the input lever 13
The switch is moved up and down by the rotation of the switch to shut off the switch in the upper position and close it in the lower position.

One end of the biasing link 17 is pivotally mounted near the pivot pin 15 on the side of the pivot pin 15 by a pin 24 . A spring receiving pin 18 is provided at the other end of this biasing link 17, and this spring receiving pin 18 is slidably supported in a long hole 11a formed obliquely toward the pivot shaft 19 of the cam lever 16 on the frame 11. and is biased toward the pivot shaft 19 by a spring 20. This spring 20 crosses the dead center when the cam lever 16 and the biasing link 17 are arranged in a straight line, and biases the cam lever 16 to rotate in the opposite direction before and after the dead center.

The clutch lever 21 has a shaft 25 at its intermediate portion.
The other end is rotatably biased by a spring 26 so that one end is slidably pressed against the side edge of the always-on lever 13. One end of the clutch lever 21 is connected to an engaging portion 13b on the side edge of the closing lever 13 when the switch is in the disconnected state.
The engaging portion 13 of the input lever 13 is engaged with the cam lever 16 to prevent it from rotating in the input direction, and is pressed and rotated by the side edge of the cam lever 16 during the rotation of the cam lever 16 during the input operation.
b is configured to be disengaged.

Stoppers 29 and 30 project from the frame 11 and are located on both sides of the input lever 13 to limit its rotation range.

Next, the operation of the operating mechanism of this embodiment will be explained. In FIG. 5, the operating mechanism holds a switch (not shown) in a disconnected state. That is, the closing lever 13 is in an overturned state and is prevented from rotating in the closing direction by the clutch lever 21.
7 and the movable contact 32 of the switch connected thereto.
These members are all supported by the clutch lever 21 in a blocked state. Therefore, the movable contact 3 of the switch
No cut-off spring is provided to keep 2 in the cut-off state. From this state, in order to close the switch, attach the handle H to the protrusion 12a, and then use the operating lever 12.
When the pivot pin 15 is rotated counterclockwise, the pivot pin 15 is pushed by the operation link 14 and moves within the circular arc-shaped elongated hole 13a, and the cam lever 16 is rotated counterclockwise at the same time. As the cam lever 16 rotates, it pushes down the biasing link 17 along the elongated hole 11a, expands the angle between them while storing energy in the spring 20, and when aligned in a straight line as shown in FIG. 6, the biasing link 17 is biased. Match the direction. Up to this point, the input lever 13 does not move. When the cam lever 16 further rotates, the end edge of the cam lever 16 comes into contact with the tip of the clutch lever 21 that is engaged with the engaging part 13b of the closing lever 13, and at the same time disengages the clutch lever 21 from the engaging part 13b.
6 and the biasing link 17 are disrupted, the spring 20 is released, and the spring force causes the biasing link 17 to collapse.
rises along the elongated hole 11a, and as a result, the cam lever 16 and the closing lever 13 rotate counterclockwise at once. The closing lever 13 comes into contact with the stopper 30 in the upright state and stops, and the lever 27 is pushed down, and in conjunction with this, the switch is closed (FIG. 7). In the closing state, the closing lever 13
is restrained by the spring force of the spring 20 via the urging link 17 and the cam lever 16.

Next, if you want to shut off the switch from this state, rotate the operating lever 12 clockwise.
The pivot pin 15 is pulled by the operation link 14 and the elongated hole 13
a, the cam lever 16 rotates clockwise, pushes down the biasing link 17 along the elongated hole 11a, stores the force in the spring 20, and connects the cam lever 16 and the biasing link as shown in FIG. 17 are aligned in a straight line and match the biasing direction of the spring 20, the spring 20 is released beyond the dead center, and the cam lever 16 is instantly rotated clockwise together with the closing lever 13, and the lever 27 is turned over. is pulled up, and in conjunction with this action, the switch is operated to shut off. The closing lever 13 comes into contact with the stopper 29 and stops, returning to the state shown in FIG. 5.

(Effect of the invention) As described above, in this invention, frame 1
1, an operating lever 12 and a charging lever 13 are pivotally attached, and an operating link 14 connects them. In a device that closes and opens the switch in conjunction with rotation, the closing lever 13 is formed with an arcuate elongated hole 13a, and the operation link 14 is provided with an elongated hole 14a in the extending direction.
The input lever 3 and the operating link 14 are pivotally connected to each other so as to be relatively movable by a pivot pin 15 that slidably passes through both the elongated holes 13a and 14a. One end of the cam lever 16 is pivoted, a pivot pin 15 is fixed to the other end of the cam lever 16, and one end of a biasing link 17 is pivoted to the side of the pivot pin 15. A spring receiving pin 18 is provided at the end, and this spring receiving pin 18 is attached to the cam lever 1 on the frame 11.
The shaft 19 is slidably supported in a long hole 11a formed facing the pivot 19 of the
This spring 20 is biased towards the cam lever 1.
When the cam lever 16 and the biasing link 17 are aligned in a straight line, the cam lever 16 crosses the dead center and is biased to rotate in the opposite direction before and after the dead center.
The middle part of the clutch lever 21 is pivoted to the holder, and one end of the clutch lever 21 is rotatably biased so that it is always slidably pressed into contact with the side edge of the closing lever 13, and the side of the clutch lever 13 is pressed against the side edge of the closing lever 13 in the cut-off state. The cam lever 16 is engaged with the engaging portion 13b on the edge to prevent rotation in the loading direction, and is pressed and rotated by the side edge of the cam lever 16 during the rotation of the cam lever 16 during the loading operation.
3 is disengaged from the engaging portion 13b, the operation of the closing lever 13, that is, all closing and closing operations are performed by spring force, and the operation lever 12
The switch can be quickly turned on and off regardless of the manual operation speed. In the closed state, the closing lever 13 is held down by the spring 20, so that it does not easily open due to unexpected external force, and in the closed state, the clutch lever 21 engages with the engaging portion 13b of the closing lever 13 to close the closing lever. Since the lever 13 is supported, there is no need for a disconnection spring to hold the movable contact 32 in the disconnected state, so the disconnection speed is appropriate, the impact during the disconnection operation is small, and there is no undue burden on the mechanism. The clutch lever 21 prevents the clutch lever 21 from damping the closing lever 13, thereby preventing accidents.

[Brief explanation of the drawing]

Figures 1 to 8 show one embodiment of the present invention; Figure 1 is a perspective view of the operating mechanism, Figure 2 is a front view with one frame cut away, and Figure 3 is a rear view. , FIG. 4 is a bottom view, FIGS. 5 to 8 are schematic front views showing the process of operation, and FIGS.
FIG. 0 is a schematic front view of a conventional operating mechanism. 11... Frame, 11a... Long hole, 12...
Operation lever, 13... Closing lever, 13a... Arc-shaped long hole, 13b... Engaging portion, 14... Operation link, 14a... Long hole, 15... Pivotal pin, 16...
Cam lever, 17...Biasing link, 18...Spring receiving pin, 19...Shaft, 20...Spring, 21...
Clutch lever, 26...spring.

Claims (1)

[Scope of utility model registration request] A control lever and a charging lever are pivotally attached to the frame, and an operating link connects the two, and the charging lever is rotatable in conjunction with the rotational operation of the operating lever.
In the device in which the switch is opened and closed in conjunction with the rotation of the closing lever, the closing lever is formed with an arc-shaped elongated hole, and the operating link is formed with an elongated hole in the extending direction, and both of these holes are formed in the operating link. The input lever and the operation link are pivotally connected to each other so as to be relatively movable by a pivot pin that slidably passes through the elongated hole, one end of the cam lever is coaxially connected to the input lever, and the other end of the cam lever is connected to the operation link. A pivot pin is fixed, and one end of a biasing link is pivotally attached to the side of the pivot pin, and a spring receiving pin is provided at the other end of the biasing link, and this spring receiving pin is mounted on the frame. The cam lever is slidably supported in a long hole formed facing the pivot of the cam lever, and biased toward the pivot of the cam lever by a spring, and this spring is applied when the cam lever and the biasing link are aligned in a straight line. Crossing the dead center,
The cam lever is urged to rotate in the opposite direction before and after the dead center, the middle part of the clutch lever is pivoted to the frame, and one end of the clutch lever is pressed against the side edge of the closing lever so as to be slidable at all times. At the same time, when the cam lever is in the cut-off state, it can be engaged with an engaging portion on the side edge of the closing lever to prevent rotation in the loading direction, and the cam lever is rotated in the middle of rotation during the closing operation. An operating mechanism for a switch, characterized in that it is configured to be pressed against a side edge and rotated to disengage from an engagement portion of a closing lever.