JPH10162677A - Switch provided with lock mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the safety by reliably retaining a main button in locked state and intermittently turn on and off the main button without operating a release button after the lock state is released by the release button and use this switch conveniently. SOLUTION: This switch comprises a main button 1 to turn on and off a contact 14A, a main spring 4 to elastically push out the main button 1, a lock lever 2 to lock the main button 1, a release button 3 to release the lock state by driving the lock lever 2, and a release spring 5 to push out the release button 3. The main button 1 has an engagement part 6 to be engaged with an engaging piece 7 of the lock lever 2. Then, at the time when the release button 3 is pushed and the lock lever 2 is turned, the engaging piece 7 is parted from the engagement part 6 to release the lock state and put the main button 1 in a state in which the button 1 can be pushed and turned on.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch having a lock mechanism for safe use.

[0002]

2. Description of the Related Art A switch provided with a lock mechanism is used particularly for a switch for electric equipment which requires safety, for example, an electric equipment which turns a blade or the like when the switch is turned on. Such an electric device may be in a dangerous state if the switch is turned on by mistake, so that the electric device can be safely used by the lock mechanism.

[0003] This type of switch has a lock mechanism for preventing the main button from being pressed. The lock mechanism includes a mechanism for releasing the locked state. The lock mechanism includes, for example, as shown in a schematic perspective view of FIG. 1, a lock groove 22 provided in the main button 1, and a lock piece 23 slidable in the lock groove 22. The lock groove 22 is
The main button 1 is provided to extend in a direction orthogonal to the direction in which the main button 1 is pressed. The lock piece 23 is mounted on the case so as to slide along the lock groove 22. Further, the lock piece 23 locks the state in which the main button 1 is pressed by being inserted into the lock groove 22, and releases the locked state of the main button 1 without being inserted into the lock groove 22.
Therefore, the lock piece 23 has a portion to be inserted into the lock groove 22 and a notch 23 </ b> A not to be inserted into the lock groove 22.

[0004]

A switch provided with a lock mechanism having the above-described structure slides a lock piece left and right to switch between a locked state and a state in which the locked state is released. When the lock piece is in the lock position, the main button cannot be pressed in the direction indicated by the arrow. Move the lock piece,
When the lock groove of the main button is in the cutout position, the switch can be turned on by pushing the main button in the direction indicated by the arrow.

A switch having a lock mechanism having this structure can prevent the lock piece from being turned on with the lock piece in the lock position. However, this switch needs to return the lock piece to the lock position in order to lock the switch after use. If the user forgets to move the lock piece to the lock position, the main button cannot be locked and the switch can be turned on by pressing the main button. For this reason, if the user forgets to operate the lock piece to the lock position after use, the main button cannot be locked, and there is a drawback that the main button cannot always be used safely and safely.

[0006] The present invention has been developed with a view to solving such a drawback. A first object of the present invention is to provide a switch provided with a lock mechanism that can securely hold a main button in a locked state and can be used safely. Furthermore, a second object of the present invention is to provide a switch having a lock mechanism that can switch on and off the main button intermittently without operating the release button after releasing the locked state with the release button. It is in.

[0007]

A switch having a lock mechanism according to the present invention has the following configuration to achieve the above object. (A) The switch includes a main button 1 that is pressed and turned on and is turned off without being pressed, a main spring 4 that elastically urges the main button 1 in a pushing direction, and locks the pressing of the main button 1. Lock lever 2
A release button 3 for driving the lock lever 2 to release the locked state of the main button 1;
And a release spring 5 for urging the push-out position to the pushing position. (B) The main button 1 is mounted on the case so as to be able to move up and down, and has a locking portion 6 locked by the lock lever 2. (C) The lock lever 2 is rotatably mounted on the case, and is provided on a locking piece 7 that is locked by the locking portion 6 of the main button 1, and provided on the opposite side of the locking piece 7. And a pressing piece 8 pressed by the release button 3. (D) The release button 3 is disposed at a position where the pressing piece 8 of the lock lever 2 is pressed.
Is pressed to rotate the lock lever 2, the locking piece 7 separates from the locking portion 6, and the locked state of the main button 1 is released, and the main button 1 is pressed to be turned on. It is configured as follows.

Further, in the switch having the lock mechanism according to the second aspect of the present invention, the main button 1 is released without pressing the release button 3 in a state where the lock state of the main button 1 is released by the release button 3. It has a structure that can move up and down with a stroke that can be switched on and off.

[0009]

The switch having the lock mechanism of the present invention is used as follows. [When the switch is held in the locked state] Unless the release button 3 is pressed, the main button 1 is held in the locked state, cannot be pushed down, and the switch is not accidentally turned on.

[When the switch is turned on] The release button 3 is pressed to rotate the lock lever 2. The pivoted lock lever 2 holds the locking piece 7 with the locking portion 6.
And release the locked state. When the main button 1 is pressed while the release button 3 is pressed to release the locked state, the switch is turned on. After slightly depressing the main button 1, even if the release button 3 is released, the main button 1 can be further depressed. Then release the main button 1 and the lock lever 2
The locking piece 7 is inserted into the locking portion 6 and returned to the locked state. For this reason, after the pressing of the main button 1 is stopped, it cannot be depressed again, and the main button 1 is locked. That is, when the pressing of the main button 1 is stopped, the locked state is automatically set.

[When the switch is turned on and off intermittently]
Is the same as above. When the main button 1 is pressed while the lock state is released while the release button 3 is being pressed, the switch is turned on. After the main button 1 is slightly depressed, the main button 1 can be further depressed even if the release button 3 is released. In this state, the main button 1 is not completely raised.
The state where the switch is turned off by slightly pushing the button and the state where the main button 1 is pushed down until the button is turned on are repeated, and the switch is turned on and off. Thereafter, when the main button 1 is released and completely raised, the locking piece 7 of the lock lever 2 is inserted into the locking portion 6 and returned to the locked state. For this reason, after the pressing of the main button 1 is stopped and completely raised, the main button 1 cannot be pressed down again, and the main button 1 returns to the locked state.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a switch provided with a lock mechanism for embodying the technical idea of the present invention, and the present invention does not specify the switch as follows.

Further, in this specification, in order to make it easier to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”.
However, the members described in the claims are not limited to the members of the embodiments.

FIGS. 2 and 3 show a hand grader 9 equipped with a switch having a locking mechanism. The hand grader 9 has a cutter at the lower end. A motor that rotates the cutter, a battery that drives the motor, and a switch that connects the battery to the motor and controls the rotation of the motor are built in the case. When the switch is turned on, the motor rotates the cutter.

FIG. 4 is an exploded perspective view of a switch having a lock mechanism. The switch in this figure turns on when pressed,
A large main button 1 that is turned off when not pressed, a main spring 4 that elastically biases the main button 1 in the pushing direction, a lock lever 2 that locks the main button 1 from being pressed, and a lock lever 2 And a release spring 5 for urging the release button 3 to the pushed-out position.

The main button 1, the release button 3 and the lock lever 2 are made of plastic, and the main spring 4 and the release spring 5 are coil springs.

The main button 1 is mounted on the insulating substrate 10 of the case so as to be tiltable via the rotation shaft 1A.
The main button 1 shown in the figure is formed in a cup shape from plastic so as to protrude outside from the switch hole 11 of the case, and has flanges 1B protruding on both sides thereof. Although not shown, the flange 1B is hooked on the inner surface of the case to specify the projecting position of the main button 1. The main button 1 has a structure in which the main button 1 is tilted about the rotation axis 1A and can move up and down on the side opposite to the rotation axis 1A. Further, the main button 1 is rotated by the rotation shaft 1 so as to be locked by the lock lever 2.
A locking portion 6 that is locked by the lock lever 2 is provided on a vertical surface opposite to A. The main button 1 shown in the figure has a locking portion 6 formed by forming a rectangular elongated recess in the horizontal direction.

The rib 12 for supporting the rotating shaft 1A is connected to the insulating substrate 10, and a rotating groove 13 for supporting the rotating shaft 1A is provided at the leading edge of the rib 12. Rotation groove 13 of rib 12
The main button 1 is placed on the insulating substrate 10
Linked to An elastic metal plate 14 which is pressed by the main button 1 and turned on / off is provided on the insulating substrate 10.
Is fixed.

The elastic metal plate 14 is used for the main button 1.
Is bent in a chevron so as to be pressed by the lower surface of the substrate, the left end is fixed to the insulating substrate 10, and the contact 14A is provided at the right end. A terminal plate 15 is fixed to the upper surface of the insulating substrate 10 below the contact 14A. Elastic metal plate 1
The switch is turned on when the contact 14A of No. 4 comes into contact with the terminal plate 15, and turned off when the contact is separated. Between the insulating substrate 10 and the main button 1, a coil spring which is a main spring 4 for pushing up the main button 1 elastically is arranged.

The lock lever 2 is rotatably mounted on the insulating substrate 10 via an intermediate rotation pin 2A. The rotation pin 2A protrudes from both sides and is inserted into a rotation groove 17 provided in a rib 16 of the insulating substrate 10 to support the lock lever 2 so that it can rotate. The lock lever 2
It has a locking piece 7 locked by the locking portion 6 of the main button 1, and a pressing piece 8 provided on the opposite side of the locking piece 7 and pressed by the release button 3. The locking piece 7 is a rotating pin 2A
The main button 1 is formed into an L-shape including a portion extending upward from the main button 1 and a portion inserted into the locking portion 6 of the main button 1. The pressing piece 8 is provided to extend horizontally from the rotating pin 2A.

Further, the lock lever 2 shown in the figure is located above the pressing piece 8 and integrally forms a pulling piece 18 in parallel with the pressing piece 8. The pressing piece 8 is longer than the lifting piece 18,
It protrudes from the lifting piece 18 and can be pressed down by the release button 3. Between the lifting piece 18 and the pressing piece 8,
A collar 3A for the release button 3 is provided.

A small coil spring 19 is provided between the pressing piece 8 and the insulating substrate 10. The coil spring 19 urges the pressing piece 8 in a direction to push up. When the pressing piece 8 is pushed up, the lock lever 2 rotates around the rotation pin 2 </ b> A, and the locking piece 7 is elastically inserted into the locking portion 6 of the main button 1. That is, the coil spring 19 is
Of the main button 1 in the direction of elastic insertion.

The release button 3 is disposed at a position where the pressing piece 8 of the lock lever 2 is pressed. The switches in the figure are
The lock lever 2 is disposed between the main button 1 and the release button 3. Like the main button 1, the release button 3 is formed of plastic in a cup shape so as to protrude from the switch hole 11 provided in the case, and has a flange 3A protruding therearound. Although not shown, the flange 3 </ b> A is hooked on the inner surface of the case to specify the projecting position of the release button 3.

The release cylinder 3 is provided on the insulating substrate 10 so that the release button 3 is moved up and down in a horizontal posture.
0 so that it can slide up and down. A guide ridge 21 for guiding the release button 3 up and down is provided on the inner surface of the guide cylinder 20. The flange of the release button 3 is provided with a notch for guiding the guide ridge 21.

As shown in FIG. 5, the switch provided with the lock mechanism having the above-described structure is operated as follows, when the release button 3 and the main button 1 are operated. (1) When the release button 3 is not pressed down, as shown in FIG. 5A, the lock lever 2 inserts the locking piece 7 into the locking portion 6 of the main button 1 to lock the main button 1 from being pressed down. . That is, in this state, the switch cannot be turned on.

(2) To release the locked state, the release button 3 is pressed down as shown by the arrow in FIG. 5A. When the release button 3 is pressed down, the release button 3 pushes down the pressing piece 8 of the lock lever 2 with the flange 3A to rotate the lock lever 2 as shown by an arrow in FIG. 5B. When the lock lever 2 is rotated to this position,
The locking piece 7 is separated from the locking portion 6 of the main button 1, and the locked state of the main button 1 is released.

(3) The unlocked main button 1 can be pressed down as shown by the arrow in FIG. 5c. Since the locked state needs to be released until the main button 1 is depressed, the release button 3 is held in the depressed state until the main button 1 is depressed.

(4) When the main button 1 is depressed, as shown in FIG. 5D, the contact 14A of the elastic metal plate 14 comes into contact with the terminal plate 15, and the switch is turned on.
When the main button 1 is pressed down and the locking piece 7 of the lock lever 2 is not guided by the locking portion 6 of the main button 1, the main button 1 does not enter the locked state. Therefore, there is no need to press the release button 3 after the main button 1 is pressed down. In addition, when the main button 1 is pressed down and the locking piece 7 is not guided by the locking portion 6, the main button 1 is slightly moved up and down, so that the switch can be turned on and off. At this time, when the main button 1 is completely raised, the locking piece 7 of the lock lever 2 is inserted into the locking portion 6 of the main button 1. Do not raise. The locking portion 6 of the main button 1 moves the lock lever 2 with the contact 14A of the elastic metal plate 14 separated from the terminal plate 15.
Are provided at positions where the locking pieces 7 are not inserted. In other words, after releasing the locked state, the contact 14A of the elastic metal plate 14 can be brought into contact with the terminal plate 15 while the main button 1 is pressed down without pressing the release button 3, and can be released. Next, the elastic metal plate 14, the main button 1, the lock lever 2, and the release button 3 are designed. That is, the main button 1 is designed to be able to move up and down with a stroke that can be switched on and off without pressing the release button 3 in a state where the locked state is released by the release button 3.

(5) When the main button 1 is not pressed, the main button 1 is pushed up by the main spring 4 to separate the contact 14A of the elastic metal plate 14 from the terminal plate 15, and the switch is turned off. In this state, the locking piece 7 of the lock lever 2 is inserted into the locking portion 6 of the main button 1, and the main button 1 is locked again.

[0030]

The switch provided with the lock mechanism according to the present invention has a feature that the switch is securely held in the locked state without any special operation and without pressing the main button, and can be used safely. This is because when the switch of the present invention does not press the main button, the locking piece of the lock lever is inserted into the locking portion of the main button to hold the main button in the locked state. The switch of this structure can be used conveniently because it can be unlocked by pressing the release button and turned on by pressing the main button, and when turning on the switch, the release button and the main button Since it is necessary to press both, there is little danger of accidentally turning on the switch, and there is a feature that it can be used extremely safely.

Further, in the switch having the lock mechanism according to the second aspect of the present invention, after the locked state is released by the release button, the main button is turned on and off intermittently without operating the release button. There is a feature that can be used conveniently. This is because the switch of the present invention does not return to the locked state until the main button is completely raised after the locked state is released.
This state of use can be used very conveniently in applications where the switch is turned on and off intermittently. In addition, after intermittent use, the main button is not pressed and the lock state can be set again, so that it can be used extremely safely.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an example of a switch having a conventional lock mechanism.

FIG. 2 is a front view showing an electric device equipped with the switch according to the embodiment of the present invention.

FIG. 3 is a side view of the electric device of FIG. 2;

FIG. 4 is an exploded perspective view of a switch provided with a lock mechanism provided in the electric device of FIG. 2;

FIG. 5 is a sectional view showing an operation state of the switch shown in FIG. 4;

[Explanation of symbols]

1: Main button 1A: Rotary axis 1
B ... Flange 2 ... Lock lever 2A ... Rotating pin 3 ... Release button 3A ... Flange 4 ... Main spring 5 ... Release spring 6 ... Locking part 7 ... Locking piece 8 ... Pressing piece 9 ... Hand grader 10 ... Insulating board 11 ... Switch Hole 12 ... Rib 13 ... Rotation groove 14 ... Elastic metal plate 14A ... Contact 15 ... Terminal plate 16 ... Rib 17 ... Rotation groove 18 ... Pull up piece 19 ... Coil spring 20 ... Guide cylinder 21 ... Guide ridge 22 ... Lock groove 23 ... Lock piece 23A: Notch

Claims (2)

[Claims] 1. A switch having all the following configurations. (A) A switch provided with a lock mechanism includes a main button (1) that is turned on when pressed and turned off without being pressed, a main spring (4) that elastically biases the main button (1) in a pushing direction, A lock lever (2) that locks the main button (1) from being pressed, a release button (3) that drives the lock lever (2) to unlock the main button (1), and a release button A release spring (5) for urging (3) to the pushing position is provided. (B) The main button (1) is mounted on the case so as to be able to move up and down, and has a locking portion (6) locked by the lock lever (2). (C) The lock lever (2) is rotatably mounted on the case, and is provided with a locking piece (7) which is locked by the locking portion (6) of the main button (1), and a locking piece (7). Provided on the opposite side of (7),
And a pressing piece (8) pressed by the release button (3). (D) The release button (3) is disposed at a position where the pressing piece (8) of the lock lever (2) is pressed, and when the release button (3) is pressed, the lock lever (2) is rotated. Then, the locking piece (7) separates from the locking part (6), the locked state of the main button (1) is released, and the main button (1) is pressed to turn on. Have been. 2. In a state in which the locked state of the main button (1) is released by the release button (3), the main button (1) can be switched on and off without pressing the release button (3). A switch comprising the lock mechanism according to claim 1, which can be moved to a position.