JP2597028Y2 - Front punching of keyboard instruments - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to front punching for a key of a keyboard instrument, which is formed of a wear-resistant member and a vibration-proofing member to prevent a contact sound with a keyboard plate, that is, at that time. It absorbs contact vibration.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 10, a front punching 20 of a keyboard instrument has been fitted on the outer periphery of a front pin 23 provided between a keyboard 21 and a front of a reed (front rail) 22. It is cylindrical. The material of the front punching 20 is a material made of the same cloth or needle punch felt, and has a substantially uniform compression hardness. Then, when a key is pressed, the force applied to the keyboard 21 is transmitted through the front punching 20 to the front 22 of the reed.
In addition, the noise propagates to the shelf, causing the shelf and the like to vibrate mechanically and generate noise. As shown in FIG. 11, a long hole 24 and a groove 25 into which the front pin 23 is loosely fitted are formed below the wooden portion 27 of the white key of the keyboard 21. The groove 25 is provided for attaching a pair of L-shaped cloths 26 to the long hole 24.

[0003]

However, in the case of a front punching of a piano which can perform silence without hitting a string, when there is no playing sound due to hitting a string, a gap between a keyboard, a reed and a shelf board, and However, there is a problem that the mechanical vibration sound generated in the vicinity thereof is transmitted as noise to a person around the performer and gives an unpleasant feeling to the people around the performer. In particular, when the front punching is made of needle punch felt, the sound of the keyboard hitting the front punching is about 50-6.
It had reached 0 dB (A). That is, when there is no sound of the strings, the mechanical noise caused by the keystrokes becomes noticeable as noise. Note that (A) in the above dB (A) means that an audibility correction curve in noise measurement is applied.

Accordingly, an object of the present invention is to provide front punching of a keyboard instrument in which contact noise between a keyboard and a reed assembly is almost prevented.

[0005]

According to the first aspect of the present invention, there is provided a wear-resistant member provided on an abutting surface side of a keyboard plate, and a vibration-proof member provided on a lower surface of the wear-resistant member. This is front punching of a keyboard instrument provided with:

Further, the present invention provides a wear-resistant member provided on the contact surface side with the lower surface of the keyboard, a vibration-proof member provided on the lower surface of the wear-resistant member, and a vibration-proof member provided on the lower surface of the wear-resistant member. And a reinforcing member provided inside the vibration member so as to be fitted to the front pin.

[0007] The invention of claim 3 provides a wear-resistant member provided on the contact surface side with the lower surface of the keyboard, a vibration-proof member provided on the lower surface of the wear-resistant member, and a vibration-proof member. This is front punching of a keyboard instrument provided with a compression deformation preventing member provided inside or on a lower surface of a vibration member. For example, a structure that is soft in the thickness direction and has a shape retaining force in the other directions and can be easily attached and detached may be employed.

[0008]

In the front punching of the keyboard musical instrument according to the first aspect of the present invention, the wear-resistant member is provided on the side of the contact surface with the lower surface of the keyboard. An anti-vibration member is provided on a lower surface of the wear-resistant member. For this reason, even if a keyboard board contacts front punching, there is almost no contact sound. Further, the vibration isolating member receives an impact at the time of contact with the keyboard via the wear-resistant member, so that it is hard to break.
That is, it has a long life. Therefore, even when the keyboard and front punching abut, there is almost no contact sound, so even when playing the keyboard instrument, there is very little unnecessary noise, and only the original performance sound of the keyboard instrument is silenced by non-stringing. Even when performing, you can enjoy it without generating noise around you.

Further, in the front punching of the keyboard instrument according to the present invention, the reinforcing member is provided inside the vibration isolating member so as to be fitted to the front pin. Therefore, when the front punching is detached from the front pin, the strength of the front punching mainly in the radial direction is reinforced. When the front punching is pinched by a finger, the front punching is not deformed by the softness and does not hinder the attachment and detachment.

Further, in the front punching of the keyboard instrument according to the present invention, the compression deformation preventing member is provided inside or on the lower surface of the vibration isolating member. If the front punching is attached to and detached from the front pin with this compression deformation preventing member, the front punching does not undergo compression deformation and does not hinder the attachment and detachment.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a keyboard instrument according to the present invention; FIG. 1 is a perspective view of front punching of a keyboard instrument according to a first embodiment of the present invention. FIG. 2 is a sectional view thereof.
As shown in FIGS. 1 and 2, front punching of a keyboard instrument according to the present invention is formed in a cylindrical shape as a whole, and a hole 1 for fitting a front pin is formed in the center thereof. The front punching is performed by a viscoelastic member 3 serving as a vibration isolating member such as a cylindrical urethane foam.
And a wear-resistant member 2 such as artificial leather adhered to the upper and lower surfaces of the urethane foam 3, respectively.

When the sound hit by the keyboard is measured using this front punching, the front punching of this embodiment is 1.3 to 9.9 dB more than the conventional cloth punch and needle punch felt front punching.
In (A), the pronunciation at that time is also reduced. For example, the conventional noise of 54.9 dB (A) is changed to 45.0 dB.
(A) has decreased. This is because when urethane foam is used as the viscoelastic member 3, its hardness is significantly lower than that of cloth or needle punch felt.
That is, since the urethane foam is very soft, it easily absorbs the vibration sound when it comes into contact with the keyboard.
The abrasion-resistant member 2 prevents the viscoelastic member 3 from being damaged at the time of contact with the keyboard. That is, since the wear-resistant member 2 is provided, the viscoelastic member 3 does not directly contact the keyboard. Therefore, the durability of the viscoelastic member 3 is improved. Therefore, the product life of the front punching is long.

In this embodiment, as shown in FIG. 3 showing a first modified example or FIG. 4 showing a second modified example, in order to further enhance the soundproofing effect of front punching, wear resistance is improved. The elastic member 2 and the viscoelastic member 3 may be easily deformed. For example, as shown in FIG. 3 or FIG.
The cut 4 or the groove 5 is formed concentrically with the wear-resistant member 2 and the viscoelastic member 3. In addition, even if the notch 4 or the groove 5 is formed in the conventional cloth or needle punch felt front punching, noise at the time of contact with the keyboard can be reduced. Therefore, even when the keyboard and front punching are in contact with each other, there is almost no contact sound, so that even when the keyboard instrument is played, unnecessary noise is extremely small, and only the original performance sound of the keyboard instrument can be enjoyed. This is advantageous because no unpleasant noise is generated for persons other than the player listening to the electronic sound source at the time of silencing performance without string striking. As a third modification of this embodiment, as shown in FIG. 5, the wear-resistant member 2 may be provided only on the keyboard side.

Next, FIG. 6 and FIG. 7 show a second embodiment of the present invention.
The front punching according to the embodiment will be described. In this front punching, instead of the viscoelastic member 3 of the first embodiment, a viscoelastic member 6 made of urethane foam or the like is provided on the outer peripheral portion, and a cloth or needle punch felt or the like is provided on the inner peripheral portion of the viscoelastic member 6. And a member 7 for lubrication and shape retention. A groove 25 is formed on the lower surface of the keyboard 21, and the width of the groove 25 and the outer diameter of the lubrication / shape holding member 7 are the same as shown by a two-dot chain line in FIG. . Other configurations are the same as those of the first embodiment.

In this front punching, the slipperiness with the metal front pin is better than that of the first embodiment when the key is adjusted or the front pin is fitted or removed from the front pin. Has improved. Further, the radial strength of the front punching is reinforced more than that of the first embodiment. For this reason, the operation time for attaching the front punching to the front pin and the operation time for removing the front punching are shorter than those in the first embodiment. Even if the keyboard 21 hits this front punching, the sound produced at that time is the same as in the first embodiment. This is because the width of the groove 25 on the lower surface of the keyboard 21 and the lubrication /
This is because the outer diameter of the shape maintaining member 7 is equal. That is, when the keyboard 21 is in contact with the front punching,
Above the lubrication / shape maintaining member 7, a gap is formed between the wear-resistant member 2 and the keyboard 21. Because of this gap, even if the keyboard 21 hits the front punching, the impact is not easily transmitted to the lubrication / shape maintaining member 7. Furthermore, if a cloth or a needle punch felt is used as the member 7 for lubrication / shape maintenance, it is possible to maintain a certain shape of front punching during the work. Other operations are the same as those of the first embodiment.

Next, a third embodiment shown in FIG. 8 will be described. In the front punching of this embodiment, instead of the wear-resistant member 2 adhered to the lower surface of the viscoelastic member 3 in the first embodiment, a reinforcing member 8 made of a hard resin or the like not pinched and bent by a finger is adhered. It is what I wore. Other configurations are the same as those of the first embodiment. The reinforcing member 8 is made of a wear-resistant member 2 such as artificial leather.
It is harder. For this reason, when attaching and detaching the front punching from the front pin, when the operator holds the side surface 3A of the viscoelastic member 3, the front punching is not easily deformed by compression. Therefore, the workability is improved. Other operations are the same as those of the first embodiment.

Next, a fourth embodiment shown in FIG. 9 will be described. In the front punching of this embodiment, instead of the viscoelastic member 3 of the first embodiment, an upper viscoelastic member 9 made of urethane foam or the like is adhered to the lower surface of the upper viscoelastic member 9 and is not pinched and bent by a finger. A reinforcing member 10 made of a resin having a certain degree of hardness, and a lower viscoelastic member 11 made of urethane foam or the like adhered to the lower surface of the reinforcing member 10 are provided. In this embodiment, the upper and lower surfaces of the front punching are formed by the wear-resistant member 2. For this reason, when attaching and detaching the front punching from the front pin, when the operator holds the side surface, the front punching is less likely to be compressed and deformed by the interposition of the reinforcing member 10. Further, the worker can work without considering the upper and lower surfaces of the front punching. That is,
The workability is improved over that of the third embodiment. Other operations are the same as those of the first embodiment. Note that the reinforcing member 10 may be provided between the wear-resistant member 2 and the viscoelastic member 9.

Further, since the lower viscoelastic member 11 such as urethane foam can be processed (thickness determination), the dimensional accuracy of the thickness is remarkably improved. Therefore, it is easy to adjust the akiki of the keyboard of the keyboard instrument, and it is possible to improve the adjustment workability.

[0019]

According to the present invention, as described above, it is possible to substantially prevent the sound of contact with the keyboard. For this reason, only the original performance sound of the keyboard instrument can be enjoyed.

[Brief description of the drawings]

FIG. 1 is a perspective view of front punching of a keyboard instrument according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of front punching of the keyboard instrument according to the first embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of front punching of a keyboard instrument according to a first modification of the first embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of front punching of a keyboard instrument according to a second modification of the first embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of front punching of a keyboard instrument according to a third modification of the first embodiment of the present invention.

FIG. 6 is a vertical sectional view of front punching of a keyboard instrument according to a second embodiment of the present invention.

FIG. 7 is a layout view of front punching of a keyboard instrument according to a second embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of front punching of a keyboard instrument according to a third embodiment of the present invention.

FIG. 9 is a vertical sectional view of front punching of a keyboard instrument according to a fourth embodiment of the present invention.

FIG. 10 is a cross-sectional view of a main part showing an arrangement of front punching of a keyboard instrument according to a conventional example.

FIG. 11 is an enlarged perspective view in which a white key of a keyboard instrument according to a conventional example is turned upside down.

[Explanation of symbols]

 2 Wear-resistant member, 3 Viscoelastic member (vibration-proof member)

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G10C 3/12

Claims (3)

(57) [Scope of request for utility model registration] 1. A keyboard comprising: a wear-resistant member provided on a contact surface side with a lower surface of a keyboard plate; and a vibration-proof member provided on a lower surface of the wear-resistant member. Front punching of musical instruments. 2. A wear-resistant member provided on a contact surface side with a lower surface of a keyboard, a vibration-proof member provided on a lower surface of the wear-resistant member, and inside the vibration-proof member. And a reinforcing member provided so as to be fitted to the front pin; and front punching of a keyboard instrument. 3. A wear-resistant member provided on a contact surface side with a lower surface of a keyboard, a vibration-proof member provided on a lower surface of the wear-resistant member, and an inner or lower surface of the vibration-proof member. Front punching for a keyboard instrument, comprising: a compression deformation preventing member provided.