JPH05290672A - Keyboard switch - Google Patents

Abstract

PURPOSE:To provide a keyboard switch by which foreign matters such as dust infiltrated into a sliding part are automatically removed, in the case of a key board switch in which a slider is slid overlapping with a housing. CONSTITUTION:A male angle part 4 is rounded regarding the square cross section form of a sliding part 3, and the vicinity of the center of each side is receded by one step, while a step difference part 5 is provided so that a key board is not slid. A groove 6 is provided obliquely on a sliding surface 33 of a slider 1 or a housing 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard switch in which a slider slides while overlapping with a housing.

In a keyboard switch having a sliding portion, if foreign matter such as dust enters the sliding portion, smooth sliding operation may not be performed, and eventually there is a possibility that it will not move. The sliding portion is worn and the gap is enlarged, causing rattling, and smooth operation cannot be performed.

As described above, measures against the intrusion of foreign matter such as dust that adversely affects the sliding portion are indispensable for this kind of keyboard switch.

[0004]

2. Description of the Related Art In a conventional keyboard switch of this type, the measure against foreign matter on the sliding portion is to prevent foreign matter from entering by covering it with a dustproof cover so as to prevent dust from entering.

[0005]

However, it is impossible to completely prevent the entry of foreign matter. There is a feeling that something is wrong with the key touch when the cover etc. is covered, and most of them are not satisfactory. Due to the dustproof cover, there are structural restrictions.
For example, the stroke length is short, the dividing line of the key top is not conspicuous, and the sculpture curved surface of the pressing surface cannot be obtained. There were problems such as.

In view of the above problems, it is an object of the present invention to provide a keyboard switch that naturally removes foreign matter such as dust that has entered the sliding portion.

[0007]

The above-mentioned object is, as shown in FIGS. 1 and 2, [1] in a keyboard switch in which a slider 1 overlaps a housing 2 and slides, a rectangular cross-sectional shape of a sliding portion 3 However, this is achieved by the keyboard switch of the present invention in which the male corner portion 4 is rounded, and the vicinity of the center of each side is retracted by a step to prevent sliding. [2] Further, in the above-mentioned sliding portion 3, the keyboard switch of the present invention in which the sliding surface 33 of the slider 1 or the housing 2 is provided with the groove 6 obliquely can be applied. [3] Also, a plurality of sliding surfaces that are divided in the sliding direction and have steps
In a keyboard switch having a sliding portion 7 composed of 77, a keyboard switch according to the present invention is also provided, in which a sliding step 77 has a stepped portion 8 in the vicinity of the center to prevent sliding. It

[0008]

[Function] That is, by providing the step portions 5 and 8 which do not slide on the sliding surfaces 33 and 77 of the sliding portions 3 and 7, the sliding area is reduced and foreign matter may enter the sliding surface accordingly. Less.

Further, since the step portions 5 and 8 form a gap, there is no hindrance to sliding even if the step portions 5 and 8 enter this portion, and foreign matter is naturally removed through the gap. Further, the sliding surface 33 is provided with the groove 6 obliquely, and the foreign matter that has entered the sliding surface 33 is swiftly taken into the groove 6 by a sliding operation, and the taken foreign matter goes down the slope and the step portion 5 Gap, female corner 44 and rounded male corner 4
It reaches the gap between and and is naturally removed.

Also, with respect to the sliding portion 7 having a plurality of sliding surfaces 77 which are divided from the structure and provided with steps, the step portion 8 is provided in the central portion in the same manner as described above to reduce the sliding area and prevent foreign matter. To be used for the removal passage.

Thus, according to the present invention, it is possible to provide a keyboard switch that naturally removes foreign matter such as dust that has entered the sliding portion.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in the drawings. Throughout the drawings, the same reference numerals denote the same objects. FIG. 1 shows an embodiment of the present invention, (a) is a configuration diagram,
(b) is a perspective view of the slider, FIG. 2 shows another embodiment of the present invention, (a) is a side sectional view, and (b) is a perspective view of the slider.

Each of the embodiments is applied to a small personal computer and a keyboard switch of a Japanese word processor. Due to the demand for miniaturization of these devices, a thin keyboard switch is required, and a key touch without discomfort is required, and it is impossible to cover with a dustproof cover, and therefore, entry of foreign matter such as dust is allowed. The influence on the sliding parts was minimized, and it was easily discharged naturally.

In one embodiment, as shown in FIG. 1 (a), a slider 1 having a key top 11 mounted on its head is inserted into a square hole 21 provided in a housing 2 made of synthetic resin, and the slider 1 is overloaded. The portion to be wrapped constitutes the sliding portion 3, and the key is smoothly and accurately pressed down by a predetermined dimension, and the switch inside the housing 2 (not shown) is operated, and the elastic body naturally restores and returns to the original position.

The slider 1 of this keyboard switch is
As shown in the enlarged perspective view of FIG. 1 (b), it is a 5 × 5 mm prism having a male corner portion 4 and is made of synthetic resin.
Is rounded, and when inserted into the square hole 21 of the housing 2, the female corner portion
There is a gap between 44 and the triangle.

The sliding surfaces on the four side surfaces of the prism are about 0.
A step portion 5 having a width of 2.5 mm lowered by 25 mm is provided for each, and the sliding surface 33 (hatched portion in the figure) is reduced to only a corner portion. Further, on the sliding surface 33, grooves 6 having a width of 1 and a depth of 0.25 mm are inclined about 30 ° and are provided in parallel at intervals of 3 mm.

The sliding surface 33 of the square hole 21 of the housing 2 is not provided with a step or a rounded corner. As a result, the sliding area of the slider 1 with respect to the square hole 21 is reduced to about 1/3, and the remaining 2/3 of the sliding portion 3 becomes the gap between the step portion 5 and the corner portion, and enters the gap portion. The foreign matter is naturally discharged through the gap as it is, the chance of entering the sliding surface 33 is reduced to 1/3, and the foreign matter that has entered gradually moves by repeating the operation and reaches the groove 6, It becomes non-resistive, moves according to the inclination, and is discharged into the gap of the step portion 5.

In this embodiment, the step portion 5 and the groove 6 are provided on the sliding surface 33 of the slider 1. However, they may be provided on the sliding surface 33 of the square hole 21 of the housing 2, and they may be provided on both surfaces. May be. In another embodiment, as shown in FIG. 2 (a), the sliding surface 77 is divided in the sliding direction and has a plurality of steps, and two sliding surfaces 77 are shown in the figure. It is a keyboard switch.

This is because there is a cup-shaped elastic body 91 at the bottom of the double-sided square hole 23 of the housing 22 and the elastic body 91 is not abnormally deformed at the other end of the slider 12 when the key top 11 is pushed down. In addition, it is necessary to provide a stopper 13 having a flared end, and since the thin keyboard switch is used, the length of the overlapping sliding portion 7 is shortened,
In order to prevent the vertical movement of 12 from becoming inaccurate and finishing, the side surface of the stopper 13 is also slid on the housing 22 to form a sliding surface 77 which is divided into two surfaces and has a step. Earning.

Moreover, as shown in FIG. 2 (b), a step portion 8 is provided in the central portion of the narrower sliding surface 77 of the slider 12 to reduce the sliding area and provide a clearance for passing foreign matter. The thicker sliding surface 77 is formed on the side surfaces of the four diverging legs 14 with the ends 13 as stoppers, and the male corners 42 are rounded only to form the sliding surface. ..

Also in this example, a double-step square hole provided in the housing 22
The sliding surface 77 of 23 remains flat and the step portion 8 is not provided. However, it does not matter if they are provided in reverse or in both.

The above-mentioned corner embodiment is merely an example, and the shape, size, and material of each part are not limited to those described above.

[0023]

As described above, with the keyboard switch of the present invention, foreign matter such as dust that has entered the sliding portion can be easily moved from the sliding portion, so a keyboard switch with high dust resistance that is naturally removed is provided. Can be provided, and the effect is great.

[Brief description of drawings]

FIG. 1 is an embodiment of the present invention (a) configuration diagram (b) slider perspective view

2 is another embodiment of the present invention (a) side sectional view (b)
Slider perspective view

[Explanation of symbols]

1,12 Slider 2,22 Housing 3,
32,7 Sliding part 4,42 Male corner part 5,8 Step part 6
Groove 11 Key top 13 Stopper 14
Foot 21 Square hole 23 Double-step square hole 3
3,77 Sliding surface 44 Female corner 91 Elastic body

Claims (3)

[Claims] 1. A keyboard switch in which a slider (1) slides while overlapping with a housing (2), and a rectangular cross section of a sliding part (3) is formed by rounding a male corner part (4). A keyboard switch characterized in that it has a step (5) retracted in the vicinity of the center to prevent sliding. 2. The sliding part (3) according to claim 1, characterized in that a groove (6) is obliquely provided on the sliding surface (33) of the slider (1) or the housing (2). Keyboard switch. 3. A keyboard switch having a sliding portion (7) composed of a plurality of sliding surfaces (77) divided in the sliding direction and having steps, in a sliding cross section of the sliding surface (77), A keyboard switch characterized in that it has a step (8) retracted in the vicinity of the center to prevent sliding.