JPH0140098Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention is intended for small electric appliances such as electric shavers, flashlights, and portable tape players that are equipped with push-button switches.

Conventionally, for example, electric razors have been equipped with push-button switches to turn on and off the power, but while push-button switches can be operated with a light touch of the fingertip, they can malfunction if they come into contact with other objects when carried or stored. There was a drawback that it was easy to cause.

This invention focuses on this fact and attempts to prevent malfunctions of the pushbutton switch by providing it with a locking means.

Below, the details will be explained based on the drawings. The drawings illustrate an electric shaver, the main body case 1 of which has a switch panel 3 fitted into the window 2 on the front, and a printed circuit board 4 inside the window 2 at the rear. A power on/off switch 5, a battery (not shown), and other circuit components are attached to the printed circuit board 4.

The switch panel 3 has an opening 7 into which a square plastic push button 8 and a sliding lock knob 9 are fitted one above the other. The push button 8 has a protrusion 10 provided on the inner surface of the switch 5.
The pushbutton switch 5 inserts the pushbutton 8 into the cylindrical mouth part 11 that protrudes forward and out from the main body case 1 and is integrally connected to the switch 5.
It works when you press it inward, but it does not return to its original position even when you release your hand, and returns to its original position when you press it again.

The sliding lock knob 9 is fitted into the opening 7 so as to be slidable in the vertical direction orthogonal to the pressing direction of the push button 9, and from the upper end of the lock knob 9, a lock piece 12 facing the inner surface of the push button 8 is inserted. The connecting portion between the push button 8 and the switch 5 is passed through the opening 12a which is opened in the lock piece 12 when it is raised. Further, the lock piece 12 of the lock knob 9 is provided with a protrusion relief recess 13 formed by holes formed in parallel above the opening 12a, and a blind wall connecting the protrusion relief recess 13 and the opening 12a is brought into contact with the protrusion. It is listed as part 18. On the other hand, a push-preventing protrusion 17 is provided on the inner surface of the push button 8, and the push-preventing protrusion 17 forms a protrusion release recess when the sliding lock knob 9 is in the downward movement position, ie, the unlocked position, as shown in FIG. Matches 13,
As shown in Figure 4, the sliding lock knob 9
It is adapted to match with the protrusion abutting portion 18 when it is in the lock position, which is the upward movement position.

In this case, as shown in FIG. 2, if the sliding lock knob 9 is moved downward to the unlocked position so that the protrusion relief recess 13 is aligned with the push-blocking protrusion 17, the push-button will be blocked as the pushbutton 8 is pressed. Protrusion 1
7 enters the protrusion release recess 13, this push button 8 can be pressed. This pressing operation operates the switch 5 to turn on the power of the electric shaver. When the push button 8 is pressed again, the push button 8 returns to its original protruding state and turns off the power.

As shown in FIG. 4, when the sliding lock knob 9 is operated upward from the unlocked position to the locked position, the protrusion abutting portion 18 aligns with the push-preventing protrusion 17, and even if the push button 8 is pressed at this time, the push-preventing protrusion 17 comes into contact with the protrusion 18, so the push button 8 cannot be pressed and is locked. In addition,
At this time, as shown in the figure, a button receiving part 14 is formed at the corner where the upper edge of the sliding lock knob 9 and the locking piece 12 intersect, so that the button receiving part 14 receives the inner surface of the lower end 8a of the push button 8. By doing so, the prevention of pressing the push button 8 becomes more stable and reliable. In addition, in order to prevent the sliding lock knob 9 from accidentally descending, in the illustrated example, two leg pieces 15, 15 are integrally suspended from the knob 9, and when the knob 9 is operated upward, the legs are Piece 15,1
5 comes into contact with the protrusions 16, 16 on the side of the main body case 1, deforms elastically and climbs over the protrusions 16, 16, and when the knob 9 reaches the upper limit of movement (locked position), it engages on the protrusions 16, 16. It is designed to stop.
In addition, the sliding friction between the nozzle 9 and the opening 7 of the switch panel 3 may be increased.

Instead of being provided on the inner surface of the push button 8, the push preventing protrusion 17 may be provided on the lock piece 12 of the sliding lock knob 9. Provided on the inner side of the

The pushbutton 8 has a part thereof so that the engagement state between the projection release recess 13 and the push prevention projection 17 can be confirmed.
Or it may be entirely transparent.

Furthermore, if one of the push button 8 and the lock knob 9 is made of a material that is more flexible than the other, the lock knob 9 can be forcibly slid under the condition in which the push prevention protrusion 17 is engaged with the protrusion release recess 13. Even if an erroneous operation is made, the push button 8 on the flexible side
Alternatively, since the lock knob 9 is bent and deformed, there is no possibility that the engagement portion between the push prevention protrusion 17 and the recess 13 will be damaged.

As explained above, the small electric device of this invention has a sliding lock knob 9 having a locking piece 12 on the outer surface of the main body case 1, on which the push button 8 of the power switch 5 is attached, to the lock position and the lock release position. When the slide type lock knob 9 is slid to the lock position, the push prevention protrusion 17 provided on either the lock piece 12 or the push button 8 is disposed on the other side. Since the push button 8 is adapted to be in a locked state by matching with the protrusion abutting portion 18, it is possible to reliably prevent the push button switch from malfunctioning when being carried.

In addition, by inserting the protrusion 10 provided on the inner surface of the push button 8 into the removable cylindrical mouth portion 11 protruding from the power switch 5, the push button 8 can be pressed and operated integrally with the switch 5. The connecting part between the push button 8 and the switch 5 is connected to the opening 1 of the lock piece 12 of the sliding lock knob 9.
2a. Therefore, when assembling these push button 8, sliding lock knob 9, and switch 5 to the main body case 1, the sliding lock knob 9 is attached to the cylindrical opening 11 of the switch 5.
After passing through the opening 12a of the push button 8, insert the protrusion 10 of the push button 8 from the front side of the main body case 1 into the cylindrical opening 11.
In addition, the sliding lock knob 9 can be temporarily assembled to the switch 5 in a positioning manner, which makes it easier to assemble the sliding lock knob 9 into the main body case 1. I can do it. Further, since the push button 8 integrally connected to the switch 5 does not slip out from the outer surface of the main body case 1, there is no need to take special measures to prevent the push button 8 from slipping off from the main body case 1. This has the advantage that the push button 8 can be easily assembled to the main body case 1, and the shape of the push button 8 itself can be made simple and its molding process can be performed easily.

[Brief explanation of the drawing]

The drawings show an electric shaver, which is an example of a small electric device according to this invention, and FIG. 1 is a perspective view;
2 is a cross-sectional view taken along the line -- in FIG. 1, FIG. 3 is an exploded perspective view of the push button, sliding lock knob, and switch, and FIG. 4 is a longitudinal sectional view showing the push button in a locked state. DESCRIPTION OF SYMBOLS 1...Main body case, 5...Power supply opening/closing switch, 8...Push button, 9...Sliding lock knob 9, 12...Lock piece, 13...Protrusion release recess, 17...Press prevention protrusion, 18... ...Protrusion contact part.

Claims (1)

[Scope of Claim for Utility Model Registration] A small electric device in which a push button 8 is attached to a part of the outer surface of the main body case 1, and a power switch 5 that is operated by pressing the button 8 is provided inside the main body case 1. The push button 8 is integrally connected to the power switch 5 by inserting a protrusion 10 provided on its inner surface into a retractable cylindrical opening 11 protruding from the power switch 5. A sliding lock knob 9 has a lock piece 12 on its outer surface, which is arranged opposite to the inner surface of the push button 8 and has an opening 12a through which the connection between the push button 8 and the power switch 5 is passed.
The inner surface of the push button 8 and the lock piece 1 are mounted so as to be slidable between two positions, a push button lock position and a push button unlock position, and are opposed to each other.
A push-blocking protrusion 17 is provided on either one of the push-button lock knobs 2, and a protrusion-contacting portion 18 that comes into contact with the push-blocking protrusion 17 when the sliding lock knob 9 is in the push-button lock position is provided on the other side. On the inner surface of the lock piece 12 or the push button 8 on the side where the part 18 is provided, there is provided a protrusion release recess 13 that matches the push prevention protrusion 17 when the sliding lock knob 9 is in the push button lock release position. A small electrical device characterized by: