JP3459504B2 - Electronic piano - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an electronic piano, and more particularly to an electronic piano capable of obtaining a touch feeling close to that of an acoustic piano. 2. Description of the Related Art Conventionally, an electronic piano generally used emits an electronic sound from a speaker based on a keyboard operation of a player, and has been unsatisfactory even in recent years as compared with an acoustic piano. Has reached no level.
A pseudo action mechanism was developed to make the keyboard feel closer to that of an acoustic piano. For example, this pseudo action mechanism is disclosed in Japanese Patent Application Laid-Open No. 4-34789.
As disclosed in Japanese Patent Laid-Open No. 5 (1993) -2005, a hammer head made of an acrylic resin or the like which is turned by a key press 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, thereby applying a pseudo action load to the keyboard, and bringing the touch of the keyboard closer to that of an acoustic piano. [0003] Of the above components, a portion other than the hammer stopper of the pseudo action mechanism is supported by a metal action support, and this action support is screwed onto a metal shelf board having keys arranged side by side. I have. The hammer stopper is supported by an action support via a metal stop rail support. [0004] In such a conventional electronic piano, when the hammer head strikes the hammer stopper, vibrations are generated by a pseudo-action via a metal stop rail support and an action support. By transmitting the vibration to the mechanism and causing it to vibrate, mechanical noise is generated. Further, since the vibration is transmitted from the action support to the keyboard via the metal shelf, the vibration is perceived as unpleasant vibration at the fingertip of the player, and the touch feeling may be impaired. An object of the present invention is to provide an electronic piano which can reduce mechanical noise and achieve a touch feeling very similar to that of an acoustic piano. The purpose is. In order to achieve the above object, according to the first aspect of the present invention, a hammer head performs a pseudo string striking operation by hitting a hammer stopper to apply a pseudo action load to a keyboard. In an electronic piano equipped with a pseudo action mechanism that provides a pseudo action mechanism, an action support that supports the pseudo action mechanism, and a shelf board on which keys are arranged side by side and the action support is fixed, a vibration isolation is provided at a connection portion between the action support and the shelf board. Lumber is inserted , Hammers
Topper in action via stoprail support
Supported by support, action support and stop
The vibration isolating material is interposed in the connection part with the tool support . [0007] According to this configuration, the pseudo action mechanism is operated by the key pressing operation of the keyboard, so that the hammer head strikes the hammer stopper. The vibration generated at the time of the impact is transmitted to the shelf via the action support, but at this time, it is attenuated by the vibration isolator provided at the connection between the two. As a result, the vibration transmitted from the shelf to the keyboard is reduced, so that the vibration does not appear as an unpleasant vibration on the fingertip of the player. [0008] [0009] Also, a vibration isolating material is provided in a connecting part between the stop rail support and action support, the vibration of the stop rail support, when it is propagated to the action supported, damped by the vibration-proof material Is done. The stop rail support is the part that is most susceptible to vibration from the hammer stopper.
The vibration of the stop rail support can be effectively damped, and the vibration of the action support can be significantly suppressed. The vibration of the keyboard can be further suppressed by the synergistic effect of the suppression of the vibration at the stage of the action support and the suppression of the vibration by the vibration isolating material at the connecting portion between the action support and the shelf board. Discomfort can be more reliably prevented. Further, by suppressing the vibration of the action support, the vibration transmitted from the action support to the pseudo action mechanism is also reduced, so that the mechanical noise caused by the vibration of the pseudo action mechanism can be reduced. Preferred embodiments of an electronic piano according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing a pseudo action mechanism of an electronic piano. As shown in FIG. 1, the pseudo action mechanism 1 of the electronic piano simulates the action mechanism of an acoustic upright piano, and is mounted on a keyboard 2 via a capstan screw 3. The whippen 4 is provided. This wippen 4
The rear end is pivotally supported by a center rail 5 extending over the entire length of the electronic piano. In addition, a jack flange 6 is erected in the center of the wippen 4,
A jack 7 having an L-shaped cross section is rotatably supported on the jack flange 6. Further, a hammer 8 is rotatably supported on an upper portion of the center rail 5, and a butt 9 is provided at a lower end of the hammer 8 with which an upper end of the jack 7 abuts. The hammer 8 has a hammer shank 10 extending upward from the bat 9 and a hammer head 11 provided at the tip of the hammer shank 10 and made of, for example, an acrylic resin. This hammer head 11
Is to strike a hammer stopper 12 in response to a key depression of the keyboard 2 to simulate a string striking operation of an acoustic piano, thereby obtaining a sense of touch at the time of string striking. That is, the hammer 8 is rotated by the jack 7 pushing up the bat 9 by the swinging operation of the whippen 4 by the key pressing operation of the keyboard 2, and as a result, the hammer head 11 hits the hammer stopper 12.
The hammer stopper 12 extends over substantially the entire width of the electronic piano, and is provided on the front surface of the base 12a with rubber, resin, cloth, cotton, paper, or the like to reduce the impact when the hammer head 11 collides. Buffer 12b made of
Has been fixed. Here, the simulated action mechanism 1 is composed of the above-mentioned various components and is constructed as an assembly which is assembled and held on a pair of left and right action supports 13 (only one is shown) made of metal. The action support 13 is erected on an upper surface 15a of a metal shelf 15, and the shelf 15 extends in the left-right direction, and a plurality of keys 2 are arranged side by side on the upper surface. Between the lower surface 13a of the action support 13 and the upper surface 15a of the shelf board 15,
An anti-vibration material 16 made of urethane foam, felt, or the like is interposed, and the anti-vibration material 16 is sandwiched therebetween.
The action support 13 and the shelf 15 are connected by bolts or the like. Further, a metal stop rail support 14 is fixed to the hammer stopper 12, and the hammer stopper 12 is fixed to the upper plate 13a of the action support 13 via a fixing portion 14a at one end of the stop rail support 14. Have been. Stop rail support 14
Fixing portion 14a and the upper plate 13a of the action support 13
And a vibration isolator 17 made of the same material as the vibration isolator 16 described above.
The stop rail support 14 and the action support 13 are connected by bolts or the like so as to sandwich the vibration isolator 17 therebetween. According to the above configuration, vibration occurs when the hammer head 11 collides with the hammer stopper 12, and this vibration is first transmitted from the metal stop rail support 14 to the action support 13. At this time, the vibration is attenuated by the vibration isolator 17. Since the stop rail support 14 is the portion most susceptible to vibration from the hammer stopper 12, the vibration can be effectively attenuated by the vibration isolator 17, and therefore, the vibration of the action support 13 is largely suppressed. be able to. Accordingly, the vibration transmitted from the action support 13 to the simulated action mechanism 1 is extremely small, so that mechanical noise caused by the vibration of the simulated action mechanism 1 can be reliably reduced. The vibration of the action support 13 is further attenuated by the vibration isolator 16 when it is propagated to the metal shelf 15. As described above, the vibration generated when the hammer stopper 12 is hit is damped and suppressed in two stages by the vibration-proof material 17 and the vibration-proof material 16, so that the vibration transmitted from the shelf 15 to the keyboard 2 is also very small. As a result, the discomfort caused by the vibration of the keyboard 2 can be reliably prevented, and the touch feeling can be improved. The present invention is not limited to the embodiments described above, but can be implemented in various modes.
For example, for the purpose of making it difficult for the vibration generated by the impact of the hammer stopper 12 to be transmitted to the keyboard 2, it is also possible to employ only one of the vibration damping materials 16 and 17. Further, a vibration isolator may be further interposed between the connecting parts of the pseudo action mechanism 1 between the metal parts to prevent the propagation of the vibration between the metal parts and further enhance the mechanical noise reduction effect. Others
It is possible to change the configuration of details within the spirit of the present invention. As described above, according to the electronic piano of the present invention, the vibration generated when the hammer stopper is hit as a pseudo string striking operation is attenuated by the vibration isolator inserted into the connecting portion of the components. -By suppressing, mechanical noise can be reduced and a touch feeling very similar to that of an acoustic piano can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing an embodiment of a pseudo action mechanism and a shelf board which are main parts of an electronic piano of the present invention. [Description of Signs] 1 pseudo action mechanism 2 keyboard 11 hammer head 12 hammer stopper 13 action support 14 stop rail support 15 shelf 16 anti-vibration material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-208094 (JP, A) JP-A-7-281660 (JP, A) Actually open 1983-96595 (JP, U) Actually open flat 7- 29596 (JP, U) U.S.A. 2-40141 (JP, U) U.S.A. 62-151593 (JP, U) U.S. Pat. No. 1,353,648 (US, A) (58) Fields investigated (Int. Cl. ⁷ , DB) G10H 1/00-7/12 G10B 1/00-3/22 G10C 1/00-9/00 G10K 11/16

Claims (1)

(57) [Claims 1] A pseudo-action mechanism that performs a pseudo-stringing operation by a hammer head striking a hammer stopper to apply a pseudo-action load to a keyboard, and a pseudo-action mechanism. An electronic piano, comprising: an action support to be supported; and a shelf board on which the keyboard is arranged and the action support is fixed, wherein a vibration isolating material is interposed at a connecting portion between the action support and the shelf board. And the hammer stopper is connected via a stop rail support.
Supported by the action support
Connection between the rail support and the stop rail support
An electronic piano , wherein a vibration isolator is interposed .