JPH02148628A - Operation device for switch - Google Patents

Abstract

PURPOSE:To reduce the number of parts by rotating an operating lever through an operating plate by the force of a toggle spring in the separation of a movable contact from a fixed contact. CONSTITUTION:When a circuit is opened by electromagnetic operation, the excitation of an electromagnet is turned off, and a working lever 2 is rapidly rotated through a working plate 4 by the spring force accumulated in a toggle spring 3 to separate a movable contact 109 from a fixed contact 105. When the circuit is opened by manual operation, an operating lever 1 is rotated through a handle 119, and at the point of time when one end of the toggle spring 3 exceeds a line connecting the center of a handle shaft 120 and the other end of the toggle spring 3, the working lever 1 is rapidly rotated through the working plate 4 by the accumulated spring force to separate the movable contact 109 from the fixed contact 105. Hence, the number of parts is reduced, and the structure is made simple.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a switch operating device for bringing a movable contact into fitting contact with a fixed contact by manual or electromagnetic operation.

[Prior Art] As shown in FIGS. 2 and 5, a conventional switch operating device includes bushings 102 and 10 on the wall of an enclosure container 101.
3 is installed. One bushing 102 is provided with a fixed electrode 104, a fixed contact 105 is attached to this fixed electrode, and a bowl-shaped arc runner 107 with an arc drive coil 106 wound around the outer periphery is provided surrounding the fixed contact. It is being A movable electrode 108 is provided on the other bushing 103, and a movable contact 109 is provided to slide on the movable electrode. 110
is rotatably supported by the enclosure container 101 by a main shaft,
An insulating arm 111 is attached with one end engaged with a movable contact. An electromagnet 112 is composed of a coil l13, a fixed iron core 114, and a movable iron core 115. 11
6 is a connecting rod attached to the movable iron core 115 and is connected to the main shaft 110 via link levers 117 and 118.

A handle 119 is fixed to a handle shaft 120.

121 is an actuating plate fixed to the handle shaft, one end of this actuating plate is configured to engage with a roller described later, the other end is provided with a spring receiver 128 of a toggle spring, and a pin 122 is protruded from the middle part. It's a shame.

123 is a lever fixed to the main shaft llO, and the roller 124
．． 125 is attached. 126 is a toggle spring, and one end is supported by a support arm 127 fixed to the enclosure 101, and the other end is supported by a spring receiver 128 of the actuating plate 121. Reference numeral 129 has one end fixed to the enclosure container and the other end fixed to the main shaft using a return spring. Reference numeral 130 denotes a lever attached to the enclosure so as to rotate, and the roller 12 is attached to the tip of the lever.
5 engages/j! 4131, a cam 132 with which the pin 122 engages is provided on the side wall, and the spring 1 has one end locked with the lever 130 and the other end locked with the enclosure container.
33 is provided and stretched so as to rotate the lever 130 counterclockwise.

When the operating device configured in this way is closed by electromagnetic operation, the fixed contact and the movable contact are in the open position as shown in FIGS. 2 and 5, and when the coil 113 is excited from this open position, The movable core 115 is the fixed core 1
The link levers 117 and 118 are actuated via the connecting rod 116, which is attached to the movable iron core at one end, to return the main shaft 110 and rotate it clockwise against the spring 129, thereby attaching it to the main shaft. The movable contact 109 is brought into contact with the fixed contact 105 via the insulating arm 111 to close the electric circuit, and the lever 12 attached to the main shaft 110
3 rotates clockwise around the main shaft and moves from the position shown in FIG. 5 to the position shown in FIG.

To open the circuit, when the excitation of the coil 113 is cut off, the main shaft rapidly rotates counterclockwise due to the spring force of the return spring 129, separating the movable contact from the fixed contact via the insulating arm 111 and opening the electric circuit. When the circuit is opened, the lever 123 returns to its original position.

Next, when closing the circuit by manual operation, when the handle 119 is rotated counterclockwise from the open state shown in FIG. 5, the handle shaft 120 rotates together with this, and the The actuating plate 121 rotates counterclockwise,
A spring receiver 128 attached to one end of the actuating plate rotates to accumulate spring force in the toggle spring 126. When the center of the spring receiver 128 crosses the dead point connecting the center of the support arm 127 and the center of the handle shaft 120, the spring force accumulated in the toggle spring 126 causes the actuating plate to move as shown in FIG.
1 further counterclockwise, the end of the actuating plate engages the roller 124, the lever 123 is rotated clockwise via this roller, and the main shaft 110 is rotated clockwise,
The insulating arm 111 attached to the main shaft 110 brings the movable contact 109 into contact with the fixed contact 105 to close the electric circuit, and the bin 122 provided on the actuating plate 121 is released from the cam 132 of the lever 130, and the lever 130 is moved by the spring. The lever 123 is rotated counterclockwise by the spring force of the lever 133, and the groove 131 of the lever engages with the roller 125.
is locked in the closed position.

Next, when opening the circuit, rotate the handle clockwise in the opposite direction to the closing operation, and when the center of the spring receiver 128 crosses the dead point, the spring force of the toggle spring 126 will further rotate the actuating plate clockwise, causing it to operate. A pin 122 provided on the plate engages a cam 132 of a lever 130, rotates the lever 130 clockwise against the spring force of a spring 133, and from a roller 125 engaged with a groove 131 of the lever 130 The lever 123 to which the roller 125 is attached is rotated counterclockwise by the spring force of the return spring 129, and the insulating arm 111 separates the movable contact from the fixed contact via the main shaft 110, thereby opening the electric circuit.

[Problems to be Solved by the Invention] When closing the circuit by manual operation, it is necessary to rotate the main shaft while stretching the toggle spring to drive the movable contact, and to stretch the return spring. Therefore, the tension of the toggle spring must be greater than the tension of the return spring, and in order to operate the handle manually, the length of the handle becomes longer, the installation space becomes larger, and the structure becomes complicated due to the large number of parts. was there.

[Means for Solving the Problems] The present invention includes an enclosure, a movable contact and a fixed contact housed in the enclosure, and a housing that is rotatably supported by a side wall of the enclosure and that moves the movable contact. A main shaft with an insulating arm attached, an actuating lever fixed to the main shaft, an electromagnet for rotating the main shaft, a handle fixed to a handle shaft rotatably supported on the side wall of the enclosure, and a handle shaft. A switch is provided with an operating lever fixed to the operating lever, and an insulating arm is rotated via the operating lever and the operating lever to bring a movable contact into fitting contact with a fixed contact, wherein one end of a toggle spring is attached to the operating lever. The actuating plate is supported by an actuating plate whose other end is freely rotatable about the handle shaft, and the actuating plate is provided with an engaging surface that engages with a pin provided on the actuating lever.

[Operation] When closing a circuit by electromagnetic operation, the main shaft is rotated by exciting the electromagnet to bring the movable contact into fitting contact with the fixed contact via the insulating arm, and the actuating plate is rotated via the actuating lever. The toggle spring is expanded by moving the movable contact, and the spring force is accumulated when the movable contact opens. When the circuit is opened, the electromagnet is de-energized, and the spring force accumulated in the toggle spring rapidly rotates the actuating lever via the actuating plate, separating the movable contact from the fixed contact.

When closing the circuit manually, rotate the operating lever via the handle, and when one end of the toggle spring crosses the line connecting the center of the handle shaft and the other end of the toggle spring fixed to the operating plate, the accumulated spring force closes the operating plate. is rotated, and the movable contact is brought into fitting contact with the fixed contact via the operating lever and the main shaft. To open the circuit, rotate the operating lever via the handle, and when one end of the toggle spring crosses the line connecting the center of the handle shaft and the other end of the toggle spring, the accumulated spring force rapidly rotates the operating lever via the operating plate. to separate the movable contact from the fixed contact.

[Example] The present invention will be described with reference to embodiments shown in the drawings.

Note that the enclosure container 101, fixed contact 105, movable contact 109, and insulating arm 111 shown in FIG. 2 are the constituent elements of the present invention. The main shaft 110, the electromagnet 112, and the handle 119 and handle shaft 120 shown in FIG. 5 are common to those in the prior art and have already been explained, so their explanation will be omitted here.

FIG. 1 is a sectional view of a main part, and shows an operating lever 1 fixed to a handle shaft 120, and an operating lever 2 fixed to a main shaft 110. One end of the toggle spring 3 is supported by a pin 11 on the operating lever 1, and the other end of the toggle spring 3 is supported by a pin 44 provided on an operating plate 4 which is freely rotatable and hangs from a handle shaft 120. The operating lever 2 has a main shaft 1
Two bins 51 and 52 fixed at different positions from the center of the bottle 10 are provided, and the actuating plate 4 is provided with an engagement surface 41 with which one of the bins 51 engages, and the engagement surface 42 is attached to the engagement surface 41. The operating lever 2 is provided oppositely in the direction in which it rotates, and the other bin 5
When the movable contact is moved to close a circuit, the engagement surface 43 surface that the 2 engages with is shifted from the engagement surface 42, and when the movable contact is moved to close the circuit, the impact with the fixed contact is alleviated and the operating force is increased. However, when the circuit is opened, the opening speed of the movable contact is increased to ensure the interruption and extinction of the arc. Reference numerals 6 and 6 are stoppers that limit the operating range of the operating lever l.

When closing the circuit by electromagnetic operation, the main shaft 110 is rotated clockwise by energizing the electromagnet 112 from the open state shown in FIG.
09 to fit into contact with the fixed contact 105, and at the same time rotate the operating lever 2 one turn clockwise to move the bins 52, 51 .
The actuating plate 4 is rotated counterclockwise via the engagement surfaces 43 and 42 to extend the toggle spring 3, and the toggle spring 3 is stopped before the dead point, and is held by the operating force of the electromagnet 112 and the third
The state shown in the figure is reached, and the position of the pin 11 does not move from point A, but the position of the pin 44 moves from point C to point D, and the spring force when the movable contact 109 opens is stored in the toggle spring 3. do.

To open the circuit, the electromagnet 112 is de-energized, the spring force accumulated in the toggle spring rotates the actuating plate 4 clockwise, and the actuating lever 2 is rapidly moved counterclockwise via the engagement surface 42 and pin 51. By rotating, the movable contact 109 is separated from the fixed contact 105 via the main shaft 110 and the insulating arm Ill.

The actuating plate 4 rotates clockwise and returns to the open state.

When closing the circuit by manual operation, from the open state, the operating lever 1 is rotated clockwise via the handle shaft 120 using the handle 119 to move the pin 11 from point A to point B as shown in FIG. When one end of the toggle spring 3 fixed to the operating lever l crosses the line connecting the center of the handle shaft 120 and the other end of the toggle spring 3 fixed to the operating plate 4, the accumulated spring force rapidly rotates the operating plate 4 counterclockwise. move it,
Move the pin 44 from point C to point E, rotate the operating lever 2 and main shaft 110 clockwise through the engagement surface 41° pin 51, and bring the movable contact 109 into fitting contact with the fixed contact 105. .

To open the circuit, rotate the operating lever l counterclockwise via the handle 119, and when one end of the toggle spring 3 crosses the line connecting the center of the handle shaft 120 and the other end of the toggle spring 3, the spring accumulated in the toggle spring is released. The actuating plate 4 is rotated clockwise by the force, and the actuating lever 2 is rapidly rotated counterclockwise via the engagement surface 43 and the pin 52.
The movable contact 109 is separated from the fixed contact 105 via the .

In addition, as shown in FIG. 8, a pin 5 is attached to the operating lever 2.
It is also possible to simplify the structure by providing only one engagement surface 42, which faces the engagement surface 41 provided on the actuating plate 4 and engages with the pin 5, in one stage.

[Effects of the Invention] As described above, according to the present invention, when the movable contact is separated from the fixed contact, the actuation lever is rotated by the force of the toggle spring via the actuation plate, and the actuation lever is rotated as in the conventional case. Since there is no need for a return spring to rotate the handle, the number of parts is reduced, and the tension of the toggle spring can be set regardless of the tension of the return spring, making the toggle spring, handle, etc. smaller (and easier to operate). It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention, FIG. 2 is a sectional view of a main circuit, and FIGS. 3 and 4 are sectional views of a main part. Fifth
6 and 7 are sectional views of main parts showing a conventional example, and FIG. 8 is a sectional view of main parts showing another embodiment. l...operation lever, 2...operation lever, 41, 42
゜43... Engagement surface, 3... Toggle spring, 4... Actuation plate, 51° 52... Pin, 110... Main shaft, 12
0...Handle shaft Figure 1 Figure Figure Figure Figure Figure

Claims (1)

[Scope of Claims] 1. An enclosure, a movable contact and a fixed contact housed in the enclosure, and an insulating arm that is rotatably supported by a side wall of the enclosure and moves the movable contact. The attached main shaft, the operating lever fixed to the main shaft,
An electromagnet for rotating the main shaft, a handle fixed to a handle shaft rotatably supported on the side wall of the enclosure, and an operating lever fixed to the handle shaft are provided, and the operating lever and the operating lever are insulated via the operating lever. In a switch that rotates an arm to bring a movable contact into fitting contact with a fixed contact, an operating plate has one end of a toggle spring supported by the operating lever, and the other end can freely rotate about a handle shaft. An operating device for a switch, characterized in that the operating plate is provided with an engagement surface that is supported by the operating plate and that engages with a pin provided on the operating lever. 2. The operating device for a switch according to claim 1, wherein the actuating plate is provided with two engaging surfaces with which the pin provided on the actuating lever engages, facing each other in the rotating direction of the actuating lever. 3. The actuation lever has two pins fixed at different positions from the center of the main shaft, and the actuation plate has an engagement surface opposite to one engagement surface, and the surface where one pin engages and the other pin engage. The operating device for a switch according to claim 1 or 2, wherein the operating device for a switch is formed into two stages with the mating surfaces being shifted from each other.