JPH08185152A - Piano damper string releasing invalidating device - Google Patents

Abstract

PURPOSE: To provide a piano equipped with an electronic musical instrument which surely prevents a noise due to the resonance of strings from being generated even in an electronic playing mode. CONSTITUTION: For switching from an acoustic piano performance to an electronic piano performance, the power source of an electronic sound source is turned ON and a hammer shank stop rail 31 is lowered with a specific lever and then cushion felt 37 stops a hammer shank 21 to prevent a hammer 23 from striking strings 25. Further, an intervention member 71 is detached from the rear end part 11a of a key 11 by operating an operation lever to make the string releasing of a damper 80 ineffective and then the state wherein the damper felt 87 is in contact with the strings 25 is maintained even when the key 11 is pressed, thereby preventing the noise due to the resonance from being generated. Consequently, not only are the strings merely prevented from being struck by the hammer 23 during a musical performance as the electronic piano, but also the strings 25 are prevented from vibrating, so a more silent electronic piano performance is enabled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for disabling string breakage of a piano damper, and particularly effective for use in a piano with built-in electronic musical instrument having an acoustic performance mode and an electronic performance mode in which an electronic sound source is controlled for performance. The present invention relates to a device for disabling string breaking of a piano damper.

[0002]

2. Description of the Related Art Conventionally, there has been proposed an electronic musical instrument built-in piano in which an electronic sound source is combined with an acoustic piano so that not only a normal piano performance but also an electronic sound source can be performed (for example, Japanese Patent Laid-Open No. 63-216099). (See Japanese Patent Application No. 5-214411). According to these pianos, when playing with an electronic sound source, it is possible to stop a normal performance sound (hereinafter referred to as a string striking sound) due to a hammer striking motion by various blocking means (sound stopping means). Therefore, by stopping the string striking sound and listening to the performance sound from the electronic sound source through headphones or the like, there is an advantage that the performance sound does not leak to the outside and the practice at night can be freely performed.

[0003]

However, even if the hammer does not come into contact with the string by the blocking means, various vibrations that occur in the piano, such as shock vibrations when the hammer collides with the blocking means and vibrations due to the depression of the pedal. However, the noise resonated with the strings. The noise sound caused by such resonance also
This can be annoying, especially at night.

Conventionally, a piano has been provided with a damper mechanism in a predetermined tone range to prevent the damper from coming into contact with a string and vibrating when a key is not pressed. However, even if you can prevent the hammer from striking strings in the electronic performance mode, in the conventional piano, the above-mentioned damper is separated from the strings when the key is pressed,
It was not possible to prevent the generation of noise due to resonance.

Conventionally, a loud pedal (damper pedal) is also provided, and the player depresses it to leave the damper in non-contact with the string even after striking the string.
It was possible to make the sound sound longer. Even with the presence of this loud pedal device, since the damper is separated from the string, it is not possible to prevent noise generation due to resonance.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a piano damper stringing nullifying device for surely preventing the generation of noise due to such string resonance.

[0007]

According to the first aspect of the present invention,
By mediating the movement of the piano keyboard and transmitting it to the damper that absorbs the vibration of the string, the damper is released from the string when the key is pressed to allow the string to vibrate, and the damper is brought into contact with the string when the key is released to allow the string to move. Since the keyboard motion transmission member for preventing vibration and the switching means for switching the keyboard motion transmission member between the intermediate state and the non-intermediate state are provided, the keyboard movement transmission member is not switched by the switching means. This is a piano damper de-stringing device characterized in that the damper is kept in contact with the strings even when a key is pressed in the intermediary state.

According to the second aspect of the present invention, the movement of the pedal is mediated and transmitted to the damper that absorbs the vibration of the string, so that when the pedal is depressed, the damper is separated from the string to allow the string to vibrate. A pedal operation transmission member for preventing the vibration of the string by bringing the damper into contact with the string when the pedal is released; and a switching unit capable of switching the pedal operation transmission member between an intermediate state and a non-intermediate state. As a result, when the pedal operation transmission member is brought into the non-intermediate state by the switching means, the state in which the damper is in contact with the strings is maintained even when the pedal is depressed, and the piano damper de-stringing device is characterized. .

According to a third aspect of the present invention, there is provided a piano damper stringing nullifying device having the structure of the first and second aspects. According to a fourth aspect of the present invention, the piano performs an acoustic performance mode in which a string is played by a hammer interlocking with a key press, and a string is prevented by the hammer and an electronic sound source is controlled based on the key press. The piano damper plucking invalid device according to any one of claims 1 to 3, which is an electronic musical instrument built-in piano that has an electronic playing mode and can be played by switching to any of the modes.

[0010]

According to the first aspect of the present invention, the damper is kept in contact with the strings even when the key is pressed when the keyboard motion transmitting member is set to the non-intermediate state by the switching means. Vibration is prevented and noise generation due to resonance is prevented.

According to the second aspect of the present invention, when the pedal movement transmitting member is set to the non-intermediate state by the switching means, the damper is kept in contact with the strings even when the pedal is depressed, so that even if the pedal is depressed, The damper can prevent the vibration of the strings and prevent the generation of noise due to resonance.

Since the invention according to claim 3 has the configurations of claim 1 and claim 2, not only when the key depression and the pedal depression occur independently, but also when both are overlapped. However, since the damper remains in contact with the strings,
Even if the pedal is depressed and the key is pressed, the damper can prevent the vibration of the strings and prevent the generation of noise due to resonance.

The piano according to claims 1 to 3 is an acoustic performance mode in which a hammer strikes a string in conjunction with a key depression, and an electronic sound source is controlled based on the key depression while preventing the hammer from striking the string. The electronic musical instrument built-in piano may be provided with an electronic musical performance mode in which the electronic musical instrument is played. With such a piano, the damper is kept in contact with the strings by the switching means, especially in the electronic performance mode, so that it is possible to perform in a quieter state.

To switch the keyboard operation transmitting member from the intermediary state to the non-intermediate state, for example, as in Examples 3 and 4 described later, the connecting portion of the keyboard operation transmitting member is made detachable, and the switching means is used for attachment / detachment operation. You can do it. When the connecting portion is put on (intermediate state) by the switching means in such a configuration, the damper can be separated from the string and the acoustic performance mode can be set. If it is released (non-intermediate state), it is possible to make the damper unable to release the string and perform in a quiet state in the electronic performance mode. Besides, as in Examples 1 and 2 described later, the keyboard motion transmitting member itself may be removed or fitted.

As another configuration for switching the keyboard operation transmitting member from the intermediary state to the non-intermediate state, for example, as in Embodiment 5 described later, a part of the keyboard operation transmitting member is made foldable, and when it is bent, the connection is made. You just need to leave it. Then, the switching means may be operated to bend or extend the portion.

[0016]

Embodiments of the present invention will now be described with reference to the drawings. Here, FIG. 1 is an explanatory diagram of internal functions centering on the string striking mechanism of the grand piano of the first embodiment. 2 and 3 are explanatory diagrams of the operation.

The grand piano of this embodiment incorporates an electronic sound source (not shown) in addition to the ordinary string striking mechanism 3. A built-in speaker and a second speaker are connected to the electronic sound source via a mixer / amplifier, and a microphone is also connected to the mixer / amplifier. When the power switch of the grand piano is in the off state, it is set to the acoustic mode and is sounded through the string striking mechanism as an acoustic piano. In the present embodiment, the case where the acoustic mode is set is also referred to as "normal case".
On the other hand, when the power switch is turned on, the electronic sound source mode is set, and the performance sound is output from the electronic sound source side by operating the key 11 of the grand piano. The output from the mixer amplifier can also be heard via headphones connected to the output terminal.

Next, the structure around the string striking mechanism 3 of the grand piano will be described with reference to FIG. A key 11 swinging by the player's operation, a capstan screw 12 that rises when the key 11 is pressed, and a wippen flange 13
Is rotatably supported by the Wippen rail 14 via
The wippen 15 which is rotated upward by the ascent of the capstan screw 12, and the jack 17 which is rotatably connected to the whippen 15 and is elevated together with the whippen 15 until it comes into contact with the regulating button 16, and the jack 17 which comes into contact with the jack 17. 17, a shank roller 18 that separates when pushed up, a cylindrical hammer shank 21 that is rotatably supported by a shank rail 20 through a shank flange 19, and that rotates upward when the shank roller 18 is pushed up, and a hammer. Shank 21
A string striking mechanism 3 including a hammer 23 mounted on the tip of the string and a string 25 hit by the hammer 23 is provided.

On the other hand, a hammer shank stop rail 31, which is a sound deadening rail, is supported by a rail up-and-down mechanism (not shown) fixed around the grand piano body. And hammer shank stop rail 3
Cushion felt 37, which is a cushioning member, is provided on the lower surface of 1.
Is provided.

Next, the damper 80 will be described. The damper 80 includes a damper lever 81 that swings in conjunction with the operation of a loud pedal described later, a damper wire 83 rotatably attached to the damper lever 81, and a damper head 85 attached to the tip of the damper wire 83. , Attached to the damper head 85, string 2
5 and the damper felt 87, which is a portion that abuts on 5, is mainly configured.

When the key 11 is pushed, the front end portion 81a of the damper lever 81 is pushed up from below by the rear end portion 11a of the key 11 as shown in the partial explanatory view of FIG. 2, and the damper wire 83, the damper head 85 and The damper felt 87 is lifted, and the damper felt 87 is separated from the string 25. Normally, by operating in this way, the damper felt 87 is separated from the string 25,
The hammer 23 hits the string 25, so that it functions as an acoustic piano.

A motion transmitting member 7 is provided at the rear end 11a of the key 11.
1 is placed. This motion transmission member 71 is provided for each key 11 over all the keys 11 in which the damper 80 is present, and the shock absorbing felt 71 is provided on the upper surface and the lower surface.
a is attached. As shown in the schematic configuration diagram of FIG. 4, each motion transmitting member 71 has a long hole 71b that is vertically penetrated in the arrangement direction of the keys 11 and that is long in the vertical direction. Long shaft 72 that passes through the hole 71b
Supported by Even if the motion transmitting member 71 is supported by the shaft 72 by the length of the long hole 71 b,
Direction). Therefore, the motion transmitting member 7
Even if 1 is placed on the rear end 11a of the key 11, the key 11
Does not hinder the movement of the key 11 and does not affect the touch of the key 11.

Both ends of the shaft 72 are supported by arms 73a and 73b, and swing about a shaft 74 provided on the arms 73a and 73b. The shaft 74 is rotatably attached to the action bracket or the piano body. A spring 75 fixed to the piano body and a wire 76 connected to an operation lever 77 are attached to the arm 73a, and when the operation lever 77 is operated, the motion transmission member 71 makes a rotational motion and is indicated by A in FIG. Move in the direction.

With these configurations, when the operation lever 77 is operated to move the motion transmitting member 71 to the left in the direction A of FIG. 1, the motion transmitting member 71 is moved to the rear end portion 11 of the key 11.
Remove from a. If the key 11 is pushed in this state, the rear end 11a of the key 11 cannot push up the front end 81a of the damper lever 81 as shown in FIG. Therefore, the damper wire 83, the damper head 85, and the damper felt 87 are not lifted, and the state in which the damper felt 87 is in contact with the string 25 is maintained.

To switch from the acoustic piano to the electronic piano, the electronic sound source is turned on and the hammer shank stop rail 31 is turned on by a predetermined lever.
The cushion felt 37 stops the hammer shank 21 at the position indicated by the broken line in FIG. 1 to prevent the hammer 23 from hitting the string 25. Further, the operation lever 77 is operated to remove the motion transmitting member 71 from the rear end portion 11a of the key 11 to invalidate the string separation of the damper 80, and the damper felt 87 contacts the string 25 even if the key 11 is pressed. The state is maintained to prevent noise due to resonance.

Since the present embodiment is constructed as described above, it not only prevents the hammer 23 from striking the string 25, but also prevents the string 25 from vibrating when playing as an electronic piano. This makes it possible to play a quieter electronic piano. Next, as a second embodiment, an example in which a motion transmitting member is applied to an upright piano will be shown.

FIG. 5 is a schematic view of the essential parts of the damper 100. This damper 100 is horizontally fixed to an action bracket 102, and the string 1
A center rail 106 that supports a string striking mechanism (not shown) such as a hammer that strikes 04, and a fixed shaft 108a of a support member 108 attached to the center rail 106 so that the center rail 106 can swing toward the string 104. Damper lever 110 and damper lever 1 formed of mild steel wire
Damper lever wire 112 extending from the upper end of 10
And a damper head 116 provided with felts 114a and 114b attached to the tip of the damper lever wire 112 and contacting the strings 104, and the damper lever 11
The end portions are fixed to the upper end portion of 0 and the support member 108,
A damper lever spring 118 that urges the damper lever 110 in a direction in which the felts 114a and 114b of the damper head 116 contact the strings 104, a capstan button 122 that rises when the player presses the key 120 downward, and a center. The wippen 126, which is rotatably supported by the rail 106 via a wippen flange 124 and rotates counterclockwise in FIG. 5 when the capstan button 122 is raised, and the capstan button 122 on the opposite side of the wippen 126. And a damper spoon 128 that is provided at the end of the action lever 102 and contacts the lower end of the damper lever 110 according to the rotation of the wippen 126, and is attached to the action bracket 102 in parallel with the center rail 106, and when the key 120 is pressed. Damper lever wire 112 contacts That damper stop rail 130
And The damper stop rail 130
A shock absorbing felt 130a is attached to the surface of the. Although not shown in FIG. 5, the damper lever wire 112 is appropriately bent toward the string 104 so that the felts 114a and 114b of the damper head 116 contact the string 104 evenly. It has been subjected.

The damper spoon 128 does not directly contact the lower end portion of the damper lever 110, but the motion transmitting member 171. This motion transmitting member 171 covers all the keys 120 in which the damper 100 is present,
It is provided every 20. The shock absorbing felt 171a is attached to the front surface and the back surface of the motion transmitting member 171. As shown in the schematic configuration diagram of FIG.
1 is a hole 1 provided to penetrate in the arrangement direction of the keys 120
71b. Holes 1 in all motion transmitting members 171
By inserting 71 b through the long shaft 172, all the motion transmitting members 171 are supported so as to be swingable about the shaft 172. Even if the motion transmitting member 171 comes into contact with the damper spoon 128, the motion transmitting member 171 can swing, so that the movement of the key 120 is not hindered. Therefore, the key 12
It does not affect the touch of 0. Shaft 172 is plate 1 at both ends
73 is attached to the left and right guide rails 174.
It is supported by a (left guide rail is not shown) so as to be vertically movable.

The guide rail 174 is fixed to the action bracket 102 or the piano body. A spring 175 and a wire 176 are attached to the plate 173, and the operation lever 1 connected to the wire 176
By operating 78, the shaft 172 moves in the vertical direction (B direction). As a result, the motion transmitting member 171
Also moves in the vertical direction (direction B).

When the key 120 is not pressed, the state shown in FIG.
As shown in FIG. 5, the upper end of the damper lever 110 swings toward the string 104 by the urging force of the damper lever spring 118, so that the felt 11 of the damper head 116 is
The vibration of the string 104 is prevented by the contact of the strings 4a and 114b with the string 104.

On the other hand, when the player pushes the key 120 downward, the capstan button 122 rises and the wippen 126 rotates counterclockwise in FIG.
The damper spoon 128 moves in the direction of arrow X1 in FIG. Then, as shown in FIG. 6, the damper spoon 128 comes into contact with the lower end portion of the damper lever 110 via the motion transmitting member 171, and the damper lever 110 is
Since the damper lever spring 118 rotates clockwise against the urging force of the damper lever spring 118,
14a and 114b will be separated from the string 104. Then, at this time, the string 104 is struck by a hammer of a string striking mechanism, and a sound is generated.

After that, when the player releases the key 120, the damper lever 110 is returned to the damper lever spring 1 again.
Since the urging force of 18 returns to the initial state shown in FIG. 5,
The felts 114a and 114b of the damper head 116 contact the strings 104 to prevent the strings 104 from vibrating.

In the acoustic performance state, the damper mechanism operates in this way. That is, the felts 114a and 114b of the damper head 116 are moved away from the strings 104 only when the strings 104 are struck in response to the operation of depressing the key 120 so that an unnecessarily long sound is not generated. Is there.

In order to switch from the acoustic piano to the electronic piano, the power of the electronic sound source is turned on as in the first embodiment, and the hammer shank is stopped by the predetermined lever at the hammer shank stop rail before striking the strings. Prevent the hammer from striking the strings 104. Further, the operation lever 178 is operated to move the motion transmission member 171 to the upper portion along the damper lever 110. As a result, the damper spoon 128 and the damper lever 1
The motion transmission member 171 is removed from between the lower end portion of 10 and. Therefore, as shown in FIG. 7, even if the key 120 is pressed, the damper spoon 128 cannot press the lower end portion of the damper lever 110, and even if the key is pressed, the felts 114 a and 114 b of the damper lever 110 cannot be pressed.
I will never leave 04. In this way, the damper 10
When the key 120 is pressed, the damper felts 114a and 114b are kept in contact with the string 104 even if the key 120 is pressed, and the generation of noise due to resonance is prevented.

Since the present embodiment is constructed as described above, not only does the hammer not prevent the hammer from striking the string 104 but also the vibration of the string 104 in the upright piano during performance as an electronic piano. Since this is prevented, a quieter electronic piano performance is possible.

Next, a third embodiment will be described. Example 3
Shows an example of disabling string separation by a damper pedal in a grand piano. FIG. 9 shows a configuration diagram of the main part thereof. In addition to this, the configuration shown in FIGS. 1 to 4 is included.
This loud pedal mechanism includes a loud pedal 210 and a lifting rod 21 whose lower end is swingably connected to the loud pedal 210.
2, a loud pedal lever 220 having one end rotatably attached to the piano body and the other end placed on the upper end 212a of the lifting rod 212, and a lower end penetrating the shelf 221 and having a lower end at the center of the loud pedal lever 220. Lifting rail lifting rod 222 that abuts the vicinity, and lifting rail lifting rod 22
The lifting rail 224 is rotatably supported by a supporting portion 221a that is in contact with the upper end of the lower part 2 from below and is projectingly provided on the shelf 221. A damper lever 226, one end of which is rotatably supported by a support portion 226a protruding from the piano body, and the damper lever 226.
Connected to the other end of the string 227 and its damper felt 2
28a, 228b, and a damper head 228 contacting each other. Of these, the damper lever 22
6, damper head 228 and damper felt 22
8a and 228b correspond to dampers. The levitation rod 21
A wire 230 is connected to the keyboard 2 from the keyboard side, and an operation lever 232 is provided at the tip. Wire 230
A spring 234 is provided on the opposite side of. As a result, by operating the operating lever 232, as shown by the solid line, the state in which the loud pedal lever 220 is placed on the upper end portion 212a of the hoisting rod 212 (link state) and the state shown by the broken line are released ( Can be switched to and from (separated state).

Next, the operation of the loud pedal mechanism having the above structure will be described. In the performance as an acoustic piano, when the player does not step on the pedal 210, the damper lever 226 is pushed up by the key depression as described with reference to FIGS.
The a and 228b are separated from the string 227, and the hammer strikes the string in this state. After the string is hit, the damper lever 226 is lowered again and the damper felts 228a and 228b come into contact with the string 227 to prevent the string 227 from vibrating. Performer pedals 21
When you depress 0, the hoisting rod 212 moves the loud pedal lever 2
20 is pushed up, and in conjunction with this, the lifting rail lifting rod 222 lifts the lifting rail 224.
As a result, the damper lever 226 is pushed up via the cushioning member 224a, and the damper felt 228 is pressed.
Since a and 228b are separated from the string 227, the vibration of the string 227 can be continued even after the key is pressed to enrich the volume timbre.

In the performance as an electronic piano, the operating lever 232 is operated to bring the push rod 212 and the loud pedal lever 220 into a separated state, and the string separation of the damper by the loud pedal 210 is invalidated. The loud pedal lever 2
Even if the 20 is separated, the stopper 220a does not lower it.

If, in this state, the release of the damper head 228 by pressing the keys is also disabled as in the case of the first embodiment, the strings 227 can be prevented from resonating, so that the playing can be performed in a quieter state. Example 4 is shown in FIGS. 10 and 11 are schematic diagrams showing the essential parts of a mechanism for canceling the string separation of the damper by the loud pedal in the upright piano. FIG. 12 shows an enlarged view of the relevant part. In addition to this, the configuration of the second embodiment shown in FIGS. Therefore, the same components are designated by the same reference numerals and the description thereof will be omitted.

This loud pedal mechanism includes a loud pedal 31
0, a push rod 312 whose lower end is swingably connected to the loud pedal 310, and a damper which is connected to the push rod 312 by an arm portion 314 and is supported by a support portion 106a of the center rail 106 by a shaft portion 316a. And a rod 316. A wire 330 is connected to the lifting rod 312 from the back side, and an operating lever 332 is provided at the tip. A spring 334 is provided on the opposite side of the wire 330. As a result, by operating the operating lever 332, the state where the arm portion 314 of the damper rod 316 is placed on the upper end portion of the lifting rod 312 (link state) and the placement shown by the broken line are released. State (separated state)
You can switch with and. A protrusion 312a is provided on the upper end portion of the lifting rod 312, and the protrusion 312a in the linked state is shown in FIG.
2, the arm portion 31 of the damper rod 316 is shown.
4 is inserted in the notch 314a. In the separated state, the protrusion 312a moves toward the tip of the arm 314, so that the two are easily separated.

Next, the operation of the loud pedal mechanism having the above structure will be described. In a performance as an acoustic piano, in a state where the player does not depress the pedal 310, the damper felts 114a and 114b are separated from the strings 104 by the key depression as described with reference to FIGS. After the string, the damper felts 114a and 114b again contact the string 104 to prevent the string 104 from vibrating. When the performer depresses the pedal 310, the push rod 312 pushes up the arm portion 314, and in conjunction with this, the damper rod 316 moves around the shaft portion 316a.
11, the outer peripheral surface of the damper rod 316 pushes the felts 114a and 114b of the damper lever 110, the lower end moves in the X1 direction, and the damper felts 114a and 114b move to the strings 1 as shown in FIG.
It becomes a state away from 04. Therefore, even after the key is pressed, the vibration of the strings 104 can be continued to enrich the volume timbre.

In the performance as an electronic piano, the operating lever 332 is operated to set the push rod 312 and the arm portion 314 in a separated state as shown by the broken line in FIG. 10, and the string separation of the damper 100 by the loud pedal 310 is disabled. And In this state, the damper 10 by pressing the key is further used as in the second embodiment.
If the key release of 0 is also invalidated, the resonance of the strings 104 can be prevented, so that the performance can be performed in a quieter state.

Example 5 is shown in FIG. The figure is an explanatory view of main parts, and the other configurations are the same as those in the fourth embodiment. Further, the same components are designated by the same reference numerals. The difference from the fourth embodiment is that the hoisting rod 412 has two partial hoisting rods 412b and 412.
13C, the shaft portion 412d is bendable, and the spring 434 contracts when the wire 430 is loosened by operating the operation lever 432, so that the linear state shown in FIG. 13A is changed to that shown in FIG. 13B. It is a point that becomes bent.

In the straight state, the tip portion 412 of the hoisting rod 412 is
e is in contact with the arm portion 314 from below, and when the loud pedal 310 is depressed in this state, the damper rod 316 rotates about the shaft portion 316a, and the outer peripheral surface of the damper rod 316 is the same as in FIG. Pushes the felts 114a and 114b of the damper lever 110, and the damper felts 114a and 114b are separated from the strings 104.

In the bent state, the tip portion 412e of the push-up rod 412 is separated from the arm portion 314 from below, and even if the loud pedal 310 is depressed in this state, the tip portion 412e of the push-up rod 412 remains in the arm portion 314. Never come into contact with. Therefore, the damper rod 316 does not rotate, and the felts 114a, 1 of the damper lever 110 are not rotated.
14b never leaves the string 104.

In this embodiment, the operation of the operation lever 432 as described above causes the damper 100 to be operated by the loud pedal 310.
Since the string separation is invalidated, the same effect as the fourth embodiment is obtained. In each of the embodiments described above, the hoisting rods 212, 312,
412 corresponds to a pedal operation transmission member. In addition, the operating levers 77, 178, 232, 332, in each embodiment.
432, wires 76, 176, 230, 330, 43
0, springs 75, 175, 234, 334, 434, shaft 7
2, 74, 172, arms 73a, 73b, plate 1
The combination of 73 and the guide rail 174 corresponds to the switching means.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of internal functions centering on a string striking mechanism of a grand piano according to a first embodiment.

FIG. 2 is a partial operation explanatory diagram.

FIG. 3 is a partial operation explanatory diagram.

FIG. 4 is a schematic configuration diagram showing an operational configuration of a motion transmitting member.

FIG. 5 is a configuration diagram of a damper main part of an upright piano according to a second embodiment.

FIG. 6 is an operation explanatory diagram when a key is pressed through the operation transmitting member.

FIG. 7 is an operation explanatory diagram when a key is pressed without using the motion transmitting member.

FIG. 8 is a schematic configuration diagram showing an operational configuration of a motion transmitting member.

FIG. 9 is a configuration diagram of a main part of a loud pedal mechanism of a grand piano according to a third embodiment.

FIG. 10 is a configuration diagram of a main part of a loud pedal mechanism of an upright piano according to a fourth embodiment.

FIG. 11 is an explanatory diagram of the operation in a state where the string separation is not invalidated.

FIG. 12 is an enlarged view of a main part thereof.

FIG. 13 is a configuration diagram of a main part of a loud pedal mechanism of an upright piano according to a fifth embodiment.

[Explanation of symbols]

3 ... String striking mechanism 11 ... Key 11a ... Rear end 21 ... Hammer shank 23 ... Hammer 25 ...
String 31 ... Hammer shank stop rail 37 ... Cushion felt 71 ... Motion transmission member
71a ... Felt 71b ... Long holes 72, 74 ... Shafts 73a, 73b ...
Arm 75 ... Spring 76 ... Wire 77 ... Operation lever
80 ... Damper 81 ... Damper lever 81a ... Front end part 83 ... Damper wire 85 ... Damper head 87 ... Damper felt 100 ... Damper 104 ... String 106 ... Center rail 106a ... Support part 108 ...
Support member 110 ... Damper lever 130a ... Felt 114a, 114b ... Damper felt 120 ... Key 128 ... Damper spoon 130 ... Damper stop rail 171 ... Motion transmission member 171a ... Felt 171b
... Hole 172 ... Shaft 173 ... Plate 174 ... Guide rail 175 ... Spring 176 ... Wire 178 ... Operating lever 210 ... Loud pedal 212 ... Raising rod 212a ... Upper end 220 ... Loud pedal lever 22
1a ... Support part 222 ... Lifting rail push-up rod 224 ... Lifting rail 224a ... Buffer member 226 ... Damper lever 226
a ... Support part 227 ... String 228 ... Damper head 228a, 228b ... Damper felt 230 ... Wire 232 ... Operation lever 234 ... Spring 310 ... Loud pedal 312 ... Raising rod 312a ... Protrusion 314 ... Arm part 314a ... Notch part 316 ... Damper rod 316a ... Shaft part 330 ... Wire 332 ... Operation lever 334 ... Spring 412 ... Leap rod 412b, 412c ... Partial leel rod 4
12d ... Shaft part 412e ... Tip part 430 ... Wire 432 ... Operation lever 434 ... Spring

Claims (4)

[Claims] 1. A damper that absorbs vibration of a string is transmitted through a movement of a keyboard of a piano to allow the vibration of the string to be released when the key is pressed, and the damper is moved to the string when the key is released. The keyboard operation transmitting member for contacting to prevent vibration of the strings and the switching means for switching the keyboard operation transmitting member between the intermediary state and the non-intermediate state are provided. A non-intermediate state device for a piano damper, which keeps the damper in contact with the strings even when a key is pressed. 2. When the pedal is stepped on, the damper is separated from the string to allow the string to vibrate, and when the pedal is released, the damper is absorbed to transmit the vibration of the string. The pedal operation transmitting member for preventing the vibration of the string by contacting the damper with the string, and the switching means for switching the pedal operation transmitting member between the intermediary state and the non-intermediate state are provided. A non-intermediation state of the pedal motion transmitting member by means, wherein the damper is kept in contact with the strings even when the pedal is stepped on, so that the device for canceling string separation of the piano damper is characterized. 3. A device for invalidating the separation of strings from a piano damper, which comprises the structure according to claim 1 or 2. 4. An acoustic performance mode in which a piano is played by striking a string with a hammer that is interlocked with a key press, and an electronic performance mode in which a string is striking by the hammer and an electronic sound source is controlled based on a key press. 4. The piano damper string disabling device according to any one of claims 1 to 3, which is a piano with built-in electronic musical instrument, which is capable of playing by switching to any of the modes.