JP2502364Y2 - Electronic musical instrument keyboard device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device for electronic musical instruments.

[0002]

2. Description of the Related Art A conventional keyboard device will be described with reference to a side view of FIG. 3 and a plane sectional view of FIG. 4 showing a relationship between a key and a key guide. In these figures, the key 2 is a pivot 3 on the rear side.
Are arranged on the keyboard chassis 1. The left and right runout of the key 2 is restricted by a key guide 4 made of a flexible member, and a slight gap is provided between the key 2 and the key guide 4 so that a smooth key movement can be performed.

[0003]

However, in the structure of the key and the key guide as shown in the conventional example, even if the key and the key guide are arranged on the chassis or the key guide bracket fixed to the chassis with high precision by press working, The left and right swing of the key is free by the slight gap between the key and the key guide, and the gap between the keys widens or narrows as shown in Fig. 4, so the gap between the keys should be about 1 mm. In the keyboard device used, irregularities are noticeable and not preferable. Also, in order to improve the key arrangement, if the gap between the key and the key guide is reduced, the dimensional accuracy will vary depending on the molding conditions. May occur.

[0004]

Therefore, according to the present invention, the left and right sides of the key guide have a thin structure having flexibility, and the width is wider than the inner dimension of the key and the flexibility is high. It is characterized in that the thin-walled parts having are arranged in one direction on the left or the right, and a force in the same direction is always applied to the keys arranged on the keyboard chassis.

[0005]

Therefore, all keys are regulated on the non-flexible side of the key guide, and if the key guides are arranged in a predetermined position, the gap between adjacent keys is kept constant, and It is possible to provide a keyboard device with no irregularities. or,
Variation in dimensional accuracy due to injection molding can be absorbed by the flexible part.

[0006]

1 is a plan sectional view showing the relationship between a key and a key guide according to an embodiment of the present invention. In the figure, a key 2 fixed to a keyboard chassis 1 and supported by a pivot fulcrum 3 placed in parallel is a key guide 4 attached to a keyboard chassis 1 or a key guide bracket 5 fixed to the keyboard chassis 1.
Is inscribed inside the front part of the key 2. Key guide 4
It is composed of a flexible member and is generally made by injection molding using a material such as elastomer. 2 (a), (b),
An external perspective view of the key guide 4 is shown in (c).

In the figure, a hollow portion surrounded by a thin portion 41 is provided on the left side of the key guide 4 so as to bend when a force is applied, and the width of the key guide 4 is free and larger than the inner dimension of the key 2. It is getting wider. When the key guide 4 is inserted into the key 2, the thin portion 41 of the key guide 4 bends, and a force to return the key guide 4 acts.
The non-pliable part on the right side of the key 2 and the right inner side of the key 2 are in contact with each other, and the left and right swings of the key 2 are restricted.

By arranging all the key guides 4 with directivity in the same direction, all the keys 2 arranged on the keyboard chassis 1 are regulated in the same direction. In the embodiment, the thin portion 41 is shown on the left side of the key 2, but it may be on the right side.

[0009]

EFFECTS OF THE INVENTION By using the present invention, a keyboard device having a smooth key operation can be obtained without irregularities in the gaps between the keys.

[Brief description of drawings]

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

2 (a), (b) and (c) are external perspective views of an essential part showing an embodiment of the present invention.

FIG. 3 is a side view showing a conventional example.

FIG. 4 is a plan sectional view showing a relationship between a key and a key guide in a conventional example.

[Explanation of symbols]

 1 keyboard chassis 2 keys 3 rotation fulcrum 4 key guide 5 key guide bracket 41 thin part

Claims (1)

(57) [Scope of utility model registration request] 1. A key guide made of a soft member attached to the keyboard chassis or a key guide bracket fixed to the chassis inside a front part of a key having a rotation fulcrum at the rear and arranged on the keyboard chassis. In the keyboard device for restricting the left and right swing of the key, the left and right side surfaces of the key guide have a thin structure with flexibility, and the width is wider than the inner dimension of the key and A keyboard device for an electronic musical instrument, characterized in that thin portions having properties are aligned in one direction to the left or right.