JP2566627Y2 - Hammer fixing device in keyboard device of electronic musical instrument - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for fixing a hammer of a keyboard device of an electronic musical instrument such as an electronic piano and an electronic organ.

[0002]

Conventionally, in the this kind of keyboard apparatus, FIG. 4
And a key c provided on a shelf a so as to be swingable at a fulcrum b as shown in FIG. 5 , by pulling down an axis d extending upward from the key c through the shelf a by a lever e, and There is a known one that is fixed by a rail f attached to a shaft d to prevent the key c from being damaged by vibration or impact when the instrument is carried or moved. Further, as a keyboard device of this kind, there is also a device in which a hammer swinging by the key is provided at a rear portion of the key, and an inertia force is applied to the key by swinging the hammer to improve a touch feeling of the key. Known (Japanese Utility Model Application 2-1499)
No. 90).

[0003]

The fixing device having a mechanical structure as shown in FIGS . 4 and 5 has a complicated structure, requires many parts, and cannot be easily assembled. Also, if this mechanically configured fixing device is applied to a keyboard device having a hammer above the rear of the key, the size of the keyboard device in the upward direction is undesirably large.

SUMMARY OF THE INVENTION An object of the present invention is to provide a keyboard device for a keyboard instrument having a hammer above a rear portion of a key so that the hammer can be fixed without increasing the size and complexity of the structure.

[0005]

According to the present invention, in order to achieve the above object, a key is swingably supported on a plurality of fulcrums provided on a shelf plate of an electronic musical instrument, and a key is provided above a rear portion of each key. Are provided with hammers which are rocked by the keys, and further provided with a rocking restricting member above each hammer to restrict the rocking upward. , One inflatable air cushion having a width across all keys is fixed.

[0006]

When the electronic musical instrument is carried or moved, an appropriate amount of air is injected by a pump or the like into an air cushion fixed to the lower surface of the swing regulating member. When the air cushion is inflated, the hammer is pressed against the key at the key release position. Thus, even if an impact is applied to the musical instrument during transportation, the air cushion absorbs the impact applied to the hammer, preventing the hammer from swinging and preventing the support portion of the hammer from being damaged. When the transportation is completed, the air inside the air cushion is removed, and the air cushion is contracted. Thus, the air cushion does not hinder the swinging of the hammer, and can be performed without hindrance.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

1 to 3, reference numeral 1 denotes a shelf board of an electronic musical instrument, 2 denotes a metal keyboard chassis constituting a keyboard device fixed on the shelf board 1, and 3 denotes a reed fixed to the keyboard chassis 2. A fulcrum 6 composed of a middle 4 and a pin 5 implanted therein
Shows a wooden key swingably supported by. A plurality of keys 3 are arranged to form a keyboard, and a hammer 7 that swings up and down by the swing of the keys 3 is provided above the rear portion of each key 3. An inertia force is given to the movement. Reference numeral 8 denotes a stopper cushion for restricting and damping the upward swing of the hammer 7.
Is fixed to the lower surface of a stopper plate 10 having a length corresponding to the width of the entire key 3 fixed to the upper end of the support member 9, and together with the stopper plate 10, constitutes a swing restricting member for the hammer 7. The support member 9 is fixed to the keyboard chassis 2 at its lower end.

Reference numeral 11 denotes a cushion 1 for restricting upward movement of the key 3.
2 is a frame that extends in the direction in which the keys 3 are arranged in order to provide the keys 2.

According to the present invention, in the keyboard device having the above-described structure, the lower surface of the stopper plate 10 can be expanded and contracted.
The air cushion 13 is provided, and the hammer 7 is pressed against the key 3 at the time of key release by the elasticity of the air cushion 13, so that the hammer 7 does not swing during transportation.

As shown in FIGS. 1 and 2, the air cushion 13 has a stopper action portion 13a having a length that traverses the entire width of the arranged keys 3 and a narrow extension portion 13b extending from one end thereof. And an air inlet 14 is provided at the end of the extension 13b. The extension 13b is
A through hole 15 formed in the shelf 1 by hanging the rear part of the hammer 7
, And the air inlet 14 is arranged at the lower part of the shelf 1.

When the air cushion 13 is not filled with air, as shown in FIG.
Since it is fixed in a state of contraction to zero, the swing of the hammer 7 by the key 3 does not hinder the performance during the performance. When air is injected from the air injection port 14 to inflate the air cushion 13 during transportation and movement of the electronic musical instrument, the hammer 7 is pressed against the key 3 as shown in FIG. The strength of the pressing force can be adjusted by the amount of air injected. The air inlet 14 is fixed to the lower surface of the shelf 1 with an adhesive tape (not shown) before and after air injection.

[0013]

According to the present invention, as described above, an inflatable air cushion is provided between the hammer disposed above the rear portion of the key of the electronic musical instrument and the swing restricting member, so that complicated mechanical The hammer can be fixed when the instrument is moved without using any means, the configuration is simple, the keyboard device is not enlarged, and the air cushion is simply injected or removed, and the handling is simple. There are some effects.

[Brief description of the drawings]

FIG. 1 is a cutaway side view of an embodiment of the present invention.

FIG. 2 is a rear perspective view of a main part of the embodiment.

FIG. 3 is a cutaway side view of the above embodiment in an activated state.

FIG. 4 is a cutaway side view of a conventional example.

FIG. 5 is a perspective view of a main part of FIG. 4 ;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 shelf board 2 keyboard chassis 3 key 6 fulcrum 7 hammer 8 stopper cushion 10 stopper plate 13 air cushion 13b extension part 14 air inlet 15 through hole

Claims (2)

(57) [Scope of request for utility model registration] 1. A key is swingably supported on a plurality of fulcrums provided on a shelf plate of an electronic musical instrument, and a hammer which is swung by the key is provided above a rear portion of each key. In an electronic musical instrument keyboard device provided with a swing regulating member for regulating the upward swing, an inflatable and inflatable air cushion having a width covering all keys is provided on a lower surface of the swing regulating member. A hammer fixing device in a keyboard device of an electronic musical instrument, wherein a hammer is fixed. 2. An end portion of the air cushion has an extension extending downward from the shelf through a through hole formed in the shelf, and an air inlet is provided in the extension. The hammer fixing device in the keyboard device for an electronic musical instrument according to claim 1.