JPH0997081A - Electronic piano - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the electronic piano which gives a touch feeling very close to that of an acoustic piano by easily assembling a dummy action mechanism, etc., in a piano body and preventing vibration from being propagated to a keyboard. SOLUTION: The dummy action mechanism 8 operates associatively with the key depression of a keyboard 4 and the hammer head 17 of this dummy action mechanism 8 strikes a hammer stopper 18 to perform artificial string striking operation, thereby placing an artificial action load on the keyboard 4. The dummy action mechanism 8 consists of a dummy action assembly 20 held by an action support 19 and a shelf plate assembly 1 having the keyboard 4 provided successively on shelf plates 3 as different bodies, and the dummy action assembly 20 is fixed to at least one of a master plate 21 and a reverse plate 24 through the action support 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic piano, and more particularly, to an electronic piano that provides a touch feeling close to that of an acoustic piano.

[0002]

2. Description of the Related Art An electronic piano that has been generally used in the past emits an electronic sound from a speaker in response to a keyboard operation by a performer, and in recent years, it has reached a level not dissatisfied with an acoustic piano. Has reached
A pseudo-action mechanism was developed to bring the touch of the keyboard closer to that of an acoustic piano. For example, this pseudo action mechanism is disclosed in Japanese Patent Laid-Open No. 34789/1992.
As disclosed in Japanese Patent Publication No. 5, a hammer head made of acrylic resin or the like that is rotated by a key depression operation of a keyboard, and a hammer stopper made of urethane foam or the like hit by the hammer head are provided. Then, the hammer head strikes the hammer stopper to perform a pseudo string striking operation, so that a pseudo action load can be applied to the keyboard, and the touch feeling of the keyboard can be made closer to that of an acoustic piano.

Of the above components, the keyboards are arranged side by side on a metal shelf board, and the pseudo-action mechanism is supported by a metal action support screwed onto the shelf board. These shelf board, keyboard, and pseudo-action mechanism are assembled in advance and then assembled into the piano body.

[0004]

In such a conventional electronic piano, the vibration generated when the hammer head hits the hammer stopper is transmitted to the keyboard through the metal action support and the shelf plate, which is uncomfortable. The vibration may be felt by the fingertips of the performer, and the touch feeling may be impaired. Further, since the shelf board, the keyboard, and the pseudo-action mechanism must be assembled into the piano body in a state where they are integrally assembled, the handling thereof is complicated and there is a problem that the assembling work cannot be performed easily.

The present invention has been made in order to solve the above problems, and facilitates assembling work such as a pseudo-action mechanism to the piano body and prevents the propagation of vibration to the keyboard. Its purpose is to provide an electronic piano that can achieve a touch feeling very similar to that of an acoustic piano.

[0006]

In order to achieve the above object, the invention of claim 1 operates a pseudo-action mechanism in conjunction with key depression of a keyboard, and a hammer head of this pseudo-action mechanism strikes a hammer stopper. In an electronic piano that gives a pseudo action load to the keyboard by performing a pseudo string striking action, a pseudo action assembly that holds a pseudo action mechanism with action support, and a shelf board assembly in which the keyboard is installed side by side on a shelf board. Are configured separately from each other, and the pseudo-action assembly is fixed to at least one of the main plate and the back plate via an action support.

According to the above construction, the pseudo-action mechanism is actuated in response to the operation of depressing the keyboard, and the hammer head strikes the hammer stopper as a pseudo string striking operation.
The vibration generated at the time of this impact is transmitted to the action support, but in this electronic piano, the action support is fixed to at least one of the base plate and the back plate, so the vibration of the action support is transmitted to the base plate and / or the back plate. Can escape to. Therefore, it is possible to prevent the vibration from being transmitted to the keyboard via the shelf plate, and the vibration does not appear as an unpleasant vibration at the player's fingertip.

Further, in this electronic piano, the pseudo-action assembly holding the pseudo-action mechanism by the action support and the shelf board assembly in which the keyboard is juxtaposed on the shelf board are constructed separately from each other. When assembling to
Since the pseudo action assembly and the shelf board assembly can be handled separately, the assembly work can be performed more easily.

In this case, it is preferable that a vibration isolator is interposed between the action support and at least one of the main plate and the back plate.

According to the above construction, the vibration of the action support is damped by the inserted vibration isolator when being transmitted to the main plate or the back plate. Therefore, by suppressing the vibration of the parent plate or the back plate, the vibration of the electronic piano itself can be almost eliminated.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the electronic piano of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view showing a pseudo action assembly and a shelf board assembly of an electronic piano, and FIG. 2 is an exploded side view schematically showing the assembling state of these. As shown in the figure, this shelf board assembly 1 of the electronic piano has a shelf board 3 made of metal.
And a plurality of keyboards 4 arranged in parallel on the shelf board 3. Each keyboard 4 rotates about a balance pin 5 as a fulcrum, and a keyboard switch 6 is provided below each keyboard 4. With this configuration, the keyboard switch 6 is turned on and off while the keyboard 4 is rotated around the balance pin 5 by the key depression operation of the keyboard 4, and based on the on / off result,
A predetermined electronic musical sound is emitted from the electronic piano. Further, a capstan screw 7 for activating a pseudo action mechanism 8 described later is provided upright on the rear end of the keyboard 4.

This pseudo-action mechanism 8 imitates the action mechanism of an acoustic upright piano, and includes a wippen 10 connected via a spindle 11 to a center rail 9 extending over the entire length of the electronic piano. I have it. The lower surface of the wippen 10 is in contact with the upper end of the capstan screw 7. Therefore, as the capstan screw 7 moves up and down, the wippen 10 rotates about the support shaft 11.
Also, in the center of the wippen 10 is a jack flange 1
2, a jack 13 having an L-shaped cross section is rotatably supported by the jack flange 12.

Further, a hammer 14 is rotatably supported on the upper part of the center rail 9, and a butt 15 with which the upper end of the jack 13 abuts is provided at the lower end of the hammer 14. The hammer 14 has a hammer shank 16 extending upward from the bat 15 and a hammer head 17 provided at the tip of the hammer shank 16. The hammer head 17 strikes a hammer stopper 18 in response to a key being pressed on the keyboard 4 to imitate a string striking operation in an acoustic piano and obtain a touch feeling when striking a string.

That is, the hammer 14 is rotated by the jack 13 pushing up the bat 15 by the swing motion of the wippen 10 by the key depression operation of the keyboard 4, and as a result, the hammer head 17 strikes the hammer stopper 18. The hammer stopper 18 is fixed to the action support 19 and extends over almost the entire width of the electronic piano.
A cushioning material made of rubber, resin, cloth, cotton, paper, or the like is fixed in order to reduce the impact when the hammer head 17 collides.

Here, the pseudo-action mechanism 8 is composed of the above-mentioned various parts, and is constructed as a pseudo-action assembly 20 assembled and held by a pair of left and right metal action supports 19 (only one is shown). Has been done. As shown in FIGS. 3 and 4, the lower end of the action support 19 has a plate-like flange 1 protruding outward.
9a are provided, and each of the master plates 21 forming both side plates of the electronic piano
An L-shaped bracket 22 having a mounting piece 22a protruding inward and extending in the horizontal direction is fixed to the inner surface of the with a screw or the like. Specifically, action support 19
After being brought into contact with the upper surface of the mounting piece 22a of the bracket 22, the flange 19a is brought into contact with the upper surface of the mounting piece 22a.
Further, a vibration isolator 23 made of urethane foam or felt is inserted between the flange 19a and the mounting piece 22a.

According to the above construction, the hammer head 17
The vibration that occurs when the hammer strikes the hammer stopper 18,
Although transmitted to the action support 19, since the action support 19 is fixed to the main board 21, the vibration of the action support 19 can be released to the main board 19. Therefore, this vibration can be prevented from being transmitted to the keyboard 4 via the shelf plate 3, the vibration of the keyboard 4 is not felt as discomfort by the player's fingertip, and the touch feeling can be improved.

Further, the vibration of the action support 19 is
When it is transmitted to the master plate 21, it is damped by the vibration isolator 23 interposed therebetween, so that the vibration of the master plate 21 is suppressed and the vibration of the electronic piano itself is almost eliminated. You can

The electronic piano having the above structure is assembled as shown in FIG. That is, first, the shelf board assembly 1 is assembled so as to be fixed and supported by the shelf support post 2 of the electronic piano, and then the upper end of the capstan screw 7 is brought into contact with the lower surface of the wippen 10 to perform a pseudo action. The assembly 20 is fixed to the main plate 21 via the action support 19 as described above. Since the shelf board assembly 1 and the pseudo-action assembly body 20 are separately configured as described above, the shelf board assembly 1 and the pseudo-action assembly body 20 can be separately assembled to the piano body. Compared to the conventional case, that is, the case where the shelf 3 and the pseudo-action mechanism 8 are integrally integrated in advance and the assembly having a large weight and size is assembled at one time, the shelf board assembly 1 and the pseudo-action assembly 20 are easily handled. , Assembly workability is extremely improved. Reference numerals 30 and 31 in FIG. 2 are an upper front plate and a keyboard cover, which are attached after the shelf board assembly 1 and the pseudo action assembly 20 are assembled into the piano body, respectively.

The electronic piano of the present invention is not limited to the above-described embodiment. For example, the action support 19 is provided on the L-shaped bracket 25 fixed to the back plate 24 (see FIG. 4) of the electronic piano. It can also be fixed via a vibration isolator. With such a configuration, the vibration of the action support 19 can be appropriately released to the back plate 24. Alternatively, by fixing the action support 19 to both the base plate 21 and the back plate 24, the action support 19 can be firmly fixed to the piano body and the vibration of the action support 19 can be reliably released.

[0021]

As described above, according to the electronic piano of the present invention, the assembling work of the pseudo action mechanism and the like to the piano body can be easily performed, and the propagation of the vibration to the keyboard is prevented, so that the acoustic piano can be played. A touch feeling very close to can be achieved.

[Brief description of drawings]

FIG. 1 is a side view showing a pseudo action assembly and a shelf board assembly which are essential parts of an electronic piano of the present invention.

FIG. 2 is a side view schematically showing how the pseudo action assembly and the shelf board assembly are attached to the piano body.

FIG. 3 is a perspective view showing a state before the action support is attached to the main board.

FIG. 4 is a perspective view showing a main plate and a back plate of the electronic piano.

[Explanation of symbols]

 1 Shelf board assembly 3 Shelf board 4 Keyboard 8 Pseudo-action mechanism 17 Hammerhead 18 Hammer stopper 19 Action support 20 Pseudo-action assembly 21 Parent board 23 Anti-vibration material 24 Back plate

Claims (2)

[Claims] 1. A pseudo-action mechanism operates in association with a key press on a keyboard, and a hammer head of the pseudo-action mechanism strikes a hammer stopper to perform a pseudo-string striking operation, thereby applying a pseudo-action load to the keyboard. In an electronic piano to be given, a pseudo-action assembly holding the pseudo-action mechanism by an action support and a shelf board assembly in which the keyboard is juxtaposed on a shelf board are configured separately from each other, and the pseudo-action assembly is also provided. Is fixed to at least one of a main plate and a back plate via the action support. 2. The electronic piano according to claim 1, wherein a vibration isolator is interposed between the action support and the at least one of the parent plate and the back plate.