JPH0863165A - Keyboard device of electronic musical instrument - Google Patents

Abstract

PURPOSE: To provide a keyboard instrument of an electronic musical instrument capable of reducing a manufacturing cost and weight and improving the degree of freedom in working of keyboards. CONSTITUTION: This keyboard device has a keyboard chassis 1 mounted with a keyboard supporting member 6, a keyboard 2 freely oscillatably supported in the central part at this keyboard supporting member 6 and a hammer action 3 arranged on the rear part side of the keyboard 2. The keyboard chassis 1 and the hammer action 3 are constituted by separating both from each other and are mounted discretely at a keybed 4 of a musical instrument body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device for an electronic musical instrument such as an electronic piano, and more particularly to an improvement of a keyboard chassis for supporting a keyboard and a mounting structure for a hammer action.

[0002]

2. Description of the Related Art As one type of keyboard device for an electronic piano, as shown in FIG. 2, a central portion of a keyboard 53 is swingably supported on each of a plurality of reeds 52 fixed to a keyboard chassis 51. It is known that a hammer action 54 is arranged on the rear side of the keyboard 53. In this keyboard device, the corresponding hammer 55 of the hammer action 54 rotates in association with the key depression of the keyboard 53 and hits the upper stopper cushion 56, so that a good key touch similar to that of an acoustic piano can be obtained.

This conventional keyboard device includes a keyboard chassis 5
A reinforcing member 57 is provided to connect the 1 and the hammer action 54 to each other. The reinforcing member 57 reinforces the keyboard chassis 51 and the hammer action 54 so that the keyboard chassis 51 and the hammer action 54 do not bend along the direction in which the keyboards 53 are arranged. The keyboard 53 extends in the front-back direction (left-right direction in the drawing) of the keyboard 53. When attaching this keyboard device to the shelf 58 of the musical instrument body, first, the reinforcing member 57 is attached to the keyboard chassis 51.
And the hammer action 54 are screwed at a plurality of points, and in this state, the keyboard chassis 51 and the hammer action 54 are screwed to the shelf 58.

[0004]

As described above, the reinforcing member 57 serves to reinforce the keyboard chassis 51 and the hammer action 54, but on the other hand, it has the following drawbacks. That is, when the above-described keyboard device is attached to the shelf board 58, the keyboard chassis 51 and the hammer action 54 must be connected by the reinforcing member 57 in advance. Moreover, since this connection is performed by screwing at a plurality of points, there is a problem in that the number of assembling steps of the reinforcing member 57 increases and the cost increases. Also,
In such a keyboard device, generally, as the length of the keyboard 53 is larger, a good key touch closer to that of an acoustic piano can be obtained. However, if the length of the keyboard 53 is increased, the length of the reinforcing member 57 is correspondingly increased, and the material cost and weight of the reinforcing member 57 are increased, which in turn increases the cost and weight of the keyboard device.

In such a keyboard device, the keyboard 53
There is a case where it is desired to collectively process the rear part of the keyboard 53 with the reed being supported by the reed 52. For example, this is a case where the rear lower surface of the keyboard 53 is cut to adjust the keyboard height of the keyboard 53. In this case, in the conventional keyboard device, the reinforcing member 57 installed for each predetermined number of keyboards 53 interferes with the processing, which is an obstacle to the processing.

The present invention has been made in order to solve such problems, and provides a keyboard device for an electronic musical instrument, which can reduce the manufacturing cost and weight and can improve the degree of freedom of keyboard processing. It is intended to be provided.

[0007]

In order to achieve the above object, a keyboard device for an electronic musical instrument according to the present invention comprises a keyboard chassis having a keyboard support member attached thereto, and a central portion swingably supported by the keyboard support member. A keyboard and a hammer action arranged on the rear side of the keyboard are provided, and the keyboard chassis and the hammer action are configured so as to be separated from each other and are separately attached to the shelf plate of the musical instrument body.

[0008]

According to this keyboard device for an electronic musical instrument, the keyboard chassis and the hammer action are constructed separately from each other and are separately attached to the shelf plate of the musical instrument body. Therefore, since the conventionally provided reinforcing member is omitted, the manufacturing cost such as the assembly cost and the material cost and the weight are reduced.

Further, it becomes possible to support a plurality of keyboards on the keyboard support member of the keyboard chassis, with only the keyboard chassis attached to the shelf and no hammer action attached. As a result, the space on the rear side of the keyboard is opened along the direction in which the keyboards are arranged.Therefore, a processing machine is installed in this open space, and while moving in the direction in which the keyboards are arranged, the rear part of each keyboard can be processed. The degree of freedom in processing the keyboard can be increased, for example, it can be performed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a keyboard device of an electronic piano to which the present invention is applied. As shown in the figure, this keyboard device is arranged on a keyboard chassis 1, a plurality of keyboards 2 swingably supported by the keyboard chassis 1, and on the rear side of the keyboard 2 (on the right end side in FIG. 1). Hammer action 3 and.

The keyboard chassis 1 is made of a steel plate, etc.
It has a letter-shaped cross section, extends long in the arrangement direction of the keyboard 2 (depth direction in the figure), and the folded back and front end portions are screwed to the front portion of the shelf plate 4 of the piano body. . At the rear end of the keyboard chassis 1, there is a reed 6 (keyboard supporting member) 6 with a balance pin 5 standing upright, and at the center is a keyboard composed of a rubber switch for detecting the key-pressed state of the keyboard 2. The switches 7 are placed on the respective keyboards 2 and fixed by screws. Also, in the front part of the keyboard chassis 1,
A guide pin 23 is provided upright to prevent lateral movement of the keyboard 2.

The keyboard 2 has a plurality of white keys 2a and black keys 2b.
Each of the keyboards 2 is composed of a wooden keyboard main body 8 extending in the front-rear direction and a keyboard skin 9 made of a resin such as acrylic adhered to the front half of the keyboard main body 8. There is. The keyboard 2 is supported in a seesaw shape around the balance pin 5 by inserting a balance pin hole 10 formed in the central portion of the keyboard body 8 into the balance pin 5. Further, the front pin hole 24 formed in the front portion of the keyboard body 8 is passed through the guide pin 23 to prevent the keyboard 2 from laterally swinging.

Lifting of the keyboard 2 near the balance pin 5 is prevented by a keyboard retainer 11 attached to the rear end surface of the keyboard chassis 1. Further, the downward rotation of the rear portion of the keyboard 2 is restricted by the lower surface of the rear end portion of the keyboard body 8 contacting the keyboard pillow 12. The keyboard pillow 12 is adhered to a keyboard pillow mounting member 13 whose front end is screwed to the shelf board 4. A plate-shaped cushion 14 made of foamed polyurethane or the like is attached to the upper surface of the rear end of the keyboard body 8.

The hammer action 3 includes a hammer rail 15 whose lower end is screwed to the rear of the shelf, a hammer flange 16, an action rib 17, and a hammer angle 18 which are sequentially screwed to the hammer rail 15.
And a plurality of hammers 19 (only one is shown) rotatably attached to the hammer flange 16. Of these components, action rib 1
7, together with the rear end of the keyboard pillow mounting member 13 described above,
It is fastened to the hammer rail 15 with a common screw. A stopper cushion 22 is attached to the hammer angle 18 above the hammer 19.

The hammer 19 is provided so as to correspond to the keyboard 2, and its rear end portion is rotatably attached to a support shaft 20 fixed to the hammer flange 16. Further, the hammer 19 has an abutting portion 21 protruding downward from the rear end portion, and the abutting portion 21 abuts on the cushion 14 of the keyboard 2.

The keyboard device having the above-mentioned configuration is a keyboard 2 shown in FIG.
In the key release state, the abutting portion 21 of the hammer 19 pushes down the rear portion of the keyboard 2 via the cushion 14, and the rear end portion of the lower surface of the keyboard 2 is in contact with the keyboard pillow 12. When the keyboard 2 is pressed from this state, the hammer 19 is flipped up in conjunction with the keyboard 2 and hits the stopper cushion 22, so that a good key touch similar to that of an acoustic piano can be obtained.

When the keyboard 2 is pressed, the keyboard switch 7 is turned on by being pressed by the lower surface of the keyboard 2,
This ON signal is output to a tone generation control device (not shown).
The tone generation control device determines the key number and the key depression speed of the depressed keyboard 2 based on this ON signal, and controls the tone generation of the electronic piano according to the determination result.

The keyboard device having the above structure is assembled, for example, as follows. First, the keyboard chassis 1 is reed 6
The keyboard chassis 1 is screwed to the shelf plate 4 while the keyboard switch 7 is screwed. Next, the keyboard pillow attachment member 13 to which the keyboard pillow 12 is adhered is screwed to the shelf board 4. Next, the balance pin hole 10 of the keyboard 2 is passed through the balance pin 5 and the front pin hole 24 is passed through the guide pin 23 to support the keyboard 2 in the reed 6, and then the keyboard retainer 1
Screw 1 to keyboard chassis 1. Then, preassembled hammer action 3 excluding hammer 19
Is fastened to the shelf plate 4, and finally the hammer 19 is attached to the hammer flange 16 to complete the assembly.

Thus, according to the keyboard device of the present invention,
Keyboard chassis 1 supporting keyboard 2, and hammer 19
The hammer actions 3 with are configured separately from one another and can be attached separately to the shelf 4.
Therefore, since the conventionally provided reinforcing member is omitted, the manufacturing cost such as the assembly cost and the material cost and the weight can be significantly reduced.

Further, in the keyboard device of the present invention, each keyboard 2 can be supported without the hammer action 3 being attached with the keyboard chassis 1 and the keyboard pillow attachment member 13 attached to the shelf plate 4. In this state, the space on the rear side of the keyboard 2 is opened along the arrangement direction of the keyboard 2. Therefore, the processing machine is installed in this opened space, and the rear portion of each keyboard is moved while moving in the arrangement direction of the keyboard. It is possible to increase the degree of freedom of processing such as performing processing. For example, in order to adjust the keyboard height of the keyboard 2, the rear lower surface of each keyboard 2 can be collectively machined.

[0021]

As described above in detail, the keyboard device for an electronic musical instrument of the present invention has the effects of reducing manufacturing cost and weight and improving the degree of freedom in keyboard processing. There is.

[Brief description of drawings]

FIG. 1 is a side view of a keyboard device according to an embodiment of the present invention.

FIG. 2 is a side view of a conventional keyboard device.

[Explanation of symbols]

 1 keyboard chassis 2 keyboard 3 hammer action 4 shelf board 6 reed

Claims (1)

[Claims] 1. A keyboard chassis to which a keyboard support member is attached, a keyboard having a central portion swingably supported by the keyboard support member, and a hammer action arranged on the rear side of the keyboard. A keyboard device for an electronic musical instrument, wherein the chassis and the hammer action are configured separately from each other and are separately attached to a shelf plate of the musical instrument body.