JP2587687Y2 - Key switch - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key switch which is used in a keyboard, for example, and in which the other end of a key top is simultaneously lowered by the action of an interlocking bar attached to the key top even if the end of the key top is pressed down. .

[0002]

2. Description of the Related Art For example, a long key (double key, space key, etc.) of a keyboard switch uses an interlocking rod so that even if one end is pushed down, the other end is pushed down together. This interlocking rod is disclosed in Japanese Utility Model Publication No. 2-18501,
Japanese Utility Model Publication No. 55-166019, Japanese Utility Model Publication 3-3201
No. 6, JP-A-3-261016, etc., as shown in FIG. 3, the ends of both arms are bent outward or inward, or both arms are long U.
The interlocking rod is rotatably held around these ends as axes.

[0003]

Since the conventional interlocking rod holds the end portion as a rotation axis, it is necessary to bend the arm part, which increases the number of processing steps of the interlocking rod, which is expensive. It becomes something.

[0004]

In order to solve the problems] Kisui by this invention
Switch on one long side of the rectangle on the inner surface of the key top.
From its long side, which is pivotally mounted parallel to the long side
At the slightly shorter connection part and both ends of the connection part,
Bend at right angles to go
U-shaped interlock consisting of an arm that is an extended end
With a bar, along the surface of the frame and on the arm
Face each other and extend in the direction in which the arm extends.
A long hole is formed, and each free end of both arms is formed in the hole.
Are slidably inserted.

[0005]

1 and 2 show an embodiment of the present invention. A membrane switch layer 12 is mounted on the bottom plate 11, and the membrane switch layer 12 has a switch section 13 formed by a membrane switch. A frame 14 is fixed to the bottom plate 11 on the membrane switch layer 12. A switch housing is constituted by the bottom plate 11 and the frame 14. At the position of the switch section 13, a key top 15 is mounted on the frame 14 so as to be movable in the direction of the bottom plate 11.

A cylindrical body 16 whose axis is perpendicular to the bottom plate 11 protrudes inward and outward from the inner periphery of a hole formed in the frame 14 and is integrally formed. An end plate 17 is provided on an end face of the cylindrical body 16 on the key top 15 side. Are formed integrally, and a guide cylinder 18 coaxial with the cylindrical body 16 is integrally formed on the inner peripheral surface of a hole formed in the end plate. A column 19 integrally formed at the center of the inner surface of the key top 15 is loosely inserted into the guide cylinder 18.
Is guided by the guide cylinder 18 and is movable in a direction perpendicular to the bottom plate 11.

The end face of the pillar 19 and the membrane switch layer 1
2, an inverted bowl-shaped return elastic body 21 is interposed. When the key top 15 is pressed against the bottom plate 11 against the biasing force of the elastic body 21, the elastic body 21 is elastically deformed, and the projection 21
“a” pushes the switch section 13 to switch on. When the force is removed from the key top 15, the key top 15 returns to the original position by the restoring action of the elastic body 21. Key top 1
The ends of a pair of engaging members 22 integrally projecting from the inner surface of the key top 15 are inserted into small holes 23 formed in the end plate 17 so that the hook 5 does not fall off. It is made to catch.

When one end of the key top 15 is pressed,
An interlocking rod 24 of a metal material is provided so that the other end also moves at the same time. The interlocking rod 24 is U-shaped, and the bottom plate 11
And a pair of arms 24b that are bent and extended in the same direction at both ends thereof. The two arm portions 24b are located at both ends of the key top 15, and the connecting portion 24a is located at an end portion of the key top 15 in a direction perpendicular to the direction connecting the two arm portions 24b. It is rotatably held on the inner surface of one of the longer side walls 15a. Protrusions 26 are integrally formed at both ends of the side wall 15a, and holding pieces 27 are integrally protruded from the side wall 15a toward the bottom plate 11 in opposition to the respective protrusions 26,
An arc-shaped concave portion 28 is provided in a portion of the holding piece 27 facing the protrusion 26.
The connecting portion 24a is rotatably held by the projection 26 and the holding piece 27 at the position of the arcuate concave portion 28.

The ends of the two arms 24b are inserted into holes 31 formed in the frame 14 in their extending directions, and are slidably held by the frame 14. Frame 1
4 is formed with a concave portion 32 which is inserted into the bottom plate 11 at a portion facing the both arm portions 24b.
Holes 31 are formed on the wall surface on the side opposite to a.
In the state where the key top 15 is not pressed, the arm portion 24b contacts the edge 33 between the bottom surface of the concave portion 32 and the hole 31, and a slight gap 34 is formed between the surface of the hole 31 on the opposite side and the arm portion 24b. Is provided. The initial angle θ between the gap 34 and the frame 14 of the arm 24b is appropriately set to reduce the play (clearance) between the arm 24b and the frame 14. When the key top 15 is depressed, the angle of the arm portion 24b becomes small as indicated by a dashed line, and the clearance at this time is minimized. The surface 35 is set.

Since the tip of the arm portion 24b is located on the bottom side of the frame 14, a gap 36 is provided between the membrane switch layer 12 and the frame 14 so as not to come into contact with the membrane switch layer 12. In the vicinity of the hole 31, a rib 37 is formed integrally with the frame 14 so that the side wall surface of the concave portion 32 extends toward the key top 15, so that the swing of the arm portion 24b is prevented.

When one end of the key top 15 is pushed toward the bottom plate 11, the connecting portion 24 a of the interlocking bar 24 also moves toward the bottom plate 11, that is, the ends of both arm portions 24 b insert the edge 33 into the hole 31. While sliding, fall to the bottom plate 11 side,
Therefore, the other end of the key top 15 also moves to the bottom plate 11 side at the same time, and the key top 15 moves to the bottom plate 11 side while the posture of the key top 15 is maintained, that is, the column 19 is perpendicular to the bottom plate 11, Key operations can be performed smoothly.

[0012]

As described above, according to the present invention, the interlocking rod 24 has a simple U shape, and the end of the arm portion 24b is not bent. That makes it cheaper.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is a plan view showing various conventional linkage rods.

Claims (1)

(57) [Scope of request for utility model registration] 1. A rectangular <br/> key top attached to the upper portion of the frame, push under its frame and vertical Then,
When the switch attached to the bottom plate of the frame opposite to the keytop is operated and the force is removed from the keytop, the keytop automatically returns to its original position.
In the switch, the key top is located on one long side of the rectangle on the inner surface of the key top.
From its long side, which is pivotally mounted parallel to the long side
At right angles to the slightly shorter connecting part and the two ends of the connecting part
And it was extended and was its extended end
A U-shaped interlocking rod consisting of an arm portion is provided, and the frame is provided along the surface thereof and at the end of the arm portion.
Face each other, and in the extension direction of the arm
An extended hole is formed, and each of the arms
A key switch having a free end slidably inserted therein .