JPH10289638A - Release mechanism of power tool switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To release a switch using a finger force by tension at emergency by providing a release lever and a release lever anchor part whose bate end is pivotally supported in a pivot position of the pushbutton pressing lever and a downward energizing force is operated at all times by a spring, between a pushbutton and a pushbutton pressing lever. SOLUTION: A release lever 8 is provided between a pushbutton pressing lever 7 whose end is pivotally supported and a pushbuttion 3 projecting to a switch main body 1. When a force is involuntarily applied to the fingers by an unexpected circumstances, the pushbutton pressing lever 7 is drawn by a force stronger than usual so as to press down the release lever 8 and at the same time release the locking of the locking part 12 of the release lever locking part 11 for locking the tip of the release lever 8 by a sliding pate 15. The upward energizing force of the pushbutton 3 pushes the release layer 8 upward so as to release the conductivity. This constitution can prevent an accident before it happens.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency release mechanism for a push-type switch provided on various power tools.

[0002]

2. Description of the Related Art Conventionally, switches provided on various electric tools are, for example, as shown in FIG.
The push button b is always pushed upward by the urging force of the spring c, and the connection terminals d and d are separated. Then, by pulling the lever e with a finger, FIG.
As shown in FIG. 7, the push button b is depressed by the lever e, and the connection terminals d and d are pressed against each other to operate various power tools. When the lever e is loosened, the push button b is pushed upward by the urging force of the spring c, and the energization is released.

[0003]

However, it is necessary to release the switch by loosening the lever due to an unexpected impact or the like while using an electric saw or an electric drill, for example. The switch cannot be released, often causing accidents such as involving work clothes. Therefore, an object of the present invention is to provide a mechanism for releasing a switch by using the force of a finger due to tension in order to solve the above-mentioned problems.

[0004]

The above object of the present invention can be achieved by the following releasing mechanism. In other words, the gist of the invention is that in a release mechanism of a push-type switch used for various electric tools, a push button protruding from a switch body by a biasing force of a spring, and a base end thereof is pivotally supported to push down the push button. A release lever whose base end is pivotally supported at the pivotal position of the push button pressing lever, and in which a downward biasing force is always applied by a spring, is provided between the lever and the push button pressing lever, and At the distal end of the release lever, a base end is pivotally supported on the distal end side of the push button pressing lever, and an intermediate portion is bent and bent to form a mooring portion for anchoring the distal end of the release lever. A release lever mooring portion is provided, and further, the release lever mooring portion holds the mooring with the release lever by a biasing force of a spring. When the lever for pushing the push button is excessively depressed, the release lever is released. Lever Is anchored is released with the parts, and press release by the biasing force of the upward button lever - is release mechanism of the switch power tool is characterized in that the mechanism is pushed upward. In the case of a small push-type switch, an auxiliary push-type button is provided between the push button and the release lever, and a mechanism for releasing the push-button by a vertical urging force of the auxiliary push-type button. Is what you do. Further, a sliding plate is provided at a position on the distal end side of the release lever mooring portion to smoothly move the release lever mooring portion in the release direction.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings showing the embodiments. As shown in FIG. 1, the switch body 1 is a mechanism in which a push button 3 penetrated upward by the urging force of a spring 2 always projects upward. In this case, the movable connection terminal 4 is in a state where its base is pressed by the projection 5 of the push button 3 and is separated from the fixed connection terminal 6.

When the push button 3 is depressed against the urging force of the spring 2, the projection 5 of the push button 3 moves downward as shown in FIG. This is a mechanism in which the energized state is maintained by being pressed against the fixed connection terminal 6. Note that the above-mentioned press switch is an example of a typical mechanism used for an electric tool, and there are various other different mechanisms. The point is that the push button is moved up and down while resisting the urging force of the spring. O of connection
Any mechanism that can perform N-OFF may be used.

Therefore, as shown in FIG. 3, a release lever 8 is provided between the push button pressing lever 7 whose base end is pivotally supported and the push button 3 protruding from the switch body 1. The release lever 8 has its base end pivotally supported on the base end side of the push button pressing lever 7, and a winding spring 10 is mounted on the pivotal support 9, and the release lever is biased by the winding spring 10. -8 is maintained in a state of being pushed downward with the pivot 9 as a fulcrum.

At the distal end of the release lever 8, there is provided a release lever anchoring portion 11 whose base end is pivotally supported at the distal end of the push button pressing lever 7. -The mooring portion 11 is formed with a mooring portion 12 which is bent in a curved shape in the middle thereof, and serves as a mechanism for mooring the distal end of the release lever 8 by the mooring portion 12. A winding spring 14 is mounted on the support 13, and a biasing force acts in the direction indicated by the arrow A in the figure by the winding spring 14, so that a mechanism for retaining the release lever 8 is provided.

Further, when the release lever mooring portion 11 is pushed downward in the direction of the distal end of the release lever mooring portion 11, the distal end smoothly slides in the direction of the arrow B in the drawing. And a sliding plate 15 is provided on the front panel.

In the present invention having the above construction, as shown in FIG. 4, when the push button pressing lever 7 is pulled by a finger or the like in the direction of arrow C in the figure, the release lever 8 of the switch body 1 When the push button 3 is depressed, the power is turned on.

Therefore, as shown in FIG. 5, when the finger is inadvertently applied due to an unexpected situation, the push button pressing lever 7 is pulled more strongly, whereby the release lever 8 is further pressed down. At the same time, since the anchoring portion 12 of the release lever anchoring portion 11 to which the distal end of the release lever 8 is anchored has a curved shape, it slides on the distal end of the release lever 7 and The tip of -8 also slides on the sliding plate 15 in the direction of the arrow B in the figure to release the mooring between the release lever 8 and the mooring portion 12, and is released by the upward urging force of the push button 3. The lever 8 is pushed upward and the energization is released.

Next, as shown in FIG. 6, when a small push-type switch 1 'is used, since the urging force of the push button 3 is small, the push-button 3 is placed between the release lever 8 and the push button 3.
An auxiliary pressing button 16 is provided. This auxiliary press button 16
When the lever 7 for pushing the push button is pulled, the release lever 8 pushes the auxiliary push button 16 against the urging force of the auxiliary push button 16 when the lever 7 for pushing the push button is pulled. When the push button 3 of the push-type switch 1 ′ is pushed down by the lower end surface of the auxiliary push switch 16, the power is turned on.

Therefore, as shown in FIG. 7, when the release lever 8 is released from mooring with the release lever mooring portion 11, the release lever 8 is raised by the upward urging force of the auxiliary pressing button 16. While being pushed upward, the push button 3 of the push-type switch 1 ′ is also pushed up by the upward urging force at the same time, and the energization is released.

[0014]

As described above, according to the present invention, the release lever is provided to the push button pressing lever for pushing down the push button without changing the mechanism of the pressing switch itself used for various electric tools. By using the characteristic that power is applied to a finger unintentionally due to a sudden situation, the switch is surely released to prevent an accident.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of an internal mechanism of a push switch used in the present invention.

FIG. 2 is an explanatory diagram showing the operating mechanism.

FIG. 3 is an explanatory view showing a release mechanism of the present invention.

FIG. 4 is an operation explanatory view showing an energized state by a release mechanism of the present invention.

FIG. 5 is an explanatory diagram showing a release stroke by the release mechanism of the present invention.

FIG. 6 is an explanatory view showing an auxiliary release mechanism of the present invention.

FIG. 7 is an explanatory diagram showing a release process by the auxiliary release mechanism of the present invention.

FIG. 8 is an explanatory view showing an internal mechanism of a conventional push-type switch.

FIG. 9 is an explanatory diagram showing the energized state of a conventional push-type switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Switch body 3 Push button 7 Push button pressing lever 8 Release lever 11 Release lever mooring part 12 Mooring part 15 Sliding plate 16 Auxiliary pressing button

Claims (3)

[Claims] In a release mechanism for a push-type switch used in various electric tools, a push button protruding from a switch body by a biasing force of a spring, and a base end thereof is pivotally supported to push down the push button. A release lever whose base end is pivotally supported at the pivotal position of the push button pressing lever and in which a downward urging force is always applied by a spring, between the lever and the push button pressing lever; Further, a mooring portion is formed at the distal end of the release lever, the base end of which is pivotally supported on the distal end side of the push button pressing lever, and the middle part thereof is bent and bent to anchor the distal end of the release lever. A release lever mooring portion, and further, the release lever mooring portion retains the mooring with the release lever by a biasing force of a spring. When the push button pressing lever is excessively depressed, the release lever is moored. Release lever mooring A mechanism for releasing a switch for a power tool, characterized in that the mechanism is released from being moored to the part and the release lever is pushed up by an upward biasing force of a push button. 2. Between the release lever and the push button,
2. The power tool switch release mechanism according to claim 1, wherein an auxiliary pressing button having a biasing force exceeding the biasing force of the push button is provided in a vertical direction of the push button. 3. A slide plate according to claim 1, wherein a slide plate is provided at a position on the distal end side of the release lever mooring portion so that the distal end of the release lever mooring portion slides in the release direction. Power tool switch release mechanism.