JPH0734476U - Keyboard instrument - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a good key touch feeling in both normal playing and non-string playing. [Constitution] Jack small 10B and regulation button 2
The changing means 51 for changing the distance d from the jack 6 is disposed directly on the jack 10 so as to be movable back and forth. During the non-string striking performance, the changing means 51 is moved forward by the moving means 52, and the spacer 55 is interposed between the small jack 10B and the regulating button 26. Further, the blocking means 53 operates in conjunction with the moving means 52, and moves the felt 72 to a position that blocks the rotation of the hammer assembly 14 immediately before the hammer 18 strikes the string 1 as shown by the chain double-dashed line.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to keyboard instruments such as upright pianos and ground pianos that strike strings with an action mechanism.

[0002]

[Prior art]

 In keyboard instruments such as upright pianos and grand pianos, where the strings are struck by an action mechanism that operates in synchronization with key presses on the keyboard, the playing volume is high, so a soft sound mechanism that selectively lowers the playing volume is used. I have it. In the case of upright pianos, this sound reduction mechanism is operated by selectively interposing the muffler felt between the strings and the hammer by pedal operation or by moving the hammer rails that lock the hammer assembly to the initial position toward the strings. By shortening the distance between the strings and the hammer, the striking force of the hammer on the strings is weakened, and the playing sound is weakened. On the other hand, in grand pianos, pedal operation is used to move the entire action mechanism along with the keyboard reed in the direction in which the keyboards are arranged side by side, reducing the number of strings hit by the hammer to reduce the sound.

Further, recently, as a keyboard instrument provided with a sound deadening device for completely not generating a string striking sound in addition to the above-described weak sound mechanism, for example, a keyboard instrument described in US Pat. No. 2,250,065 is proposed. Has been done. This muffling device prevents the hammer from striking the strings by pre-lifting the hammer assembly during non-striking performance that does not generate string striking sounds and preventing the jack from pushing up the hammer assembly during key-pressing operations. It is possible to realize a performance that does not generate string sounds (silence performance). By incorporating such a muffling device into a keyboard instrument together with a key sensor used in an automatic playing piano, you can enjoy playing a natural piano during normal playing without silence (including soft playing). It is possible to enjoy the performance of an electronic piano in which a key sensor controls a musical tone control circuit to generate an electronic tone when a string is not played.

[0004]

[Problems to be solved by the device]

 However, in the above-described conventional silencer, the hammer assembly is lifted in advance during non-string striking, so the jack does not push up the hammer assembly even when the key is pressed, and therefore the key touch feeling during normal playing cannot be obtained. There was a drawback.

Therefore, as a method for solving such a problem, the present applicant operates the blocking means for blocking the rotation of the hammer assembly immediately before the hammer strikes the string in the non-string playing and the blocking means. A keyboard instrument having a switching means for switching between normal performance and non-stringed performance has already been proposed (Japanese Patent Application No. 4-171641). By the way, in such a keyboard instrument, there was a problem that the touch of the key had to be sacrificed to some extent when the pronunciation by the string striking was completely prevented. That is, in order to prevent the string striking sound from being generated, it is necessary to bring the stopper closer to the hammer shank side. At this time, the normal approach (the distance between the striking surface of the hammer and the string when the hammer does not receive the thrust force from the jack and starts the free rotation motion) remains about 2 mm. With this approach value, the hammer shank is caught and stopped by the jack and stopper before the bat of the hammer assembly leaves the jack, making it difficult to hit repeatedly, making it impossible to perform like a conventional piano. . In order to prevent this, the approach must be wider than usual, for example, about 5 to 7 mm. That is, to adjust the time when the bat leaves the jack early. If this is done, the touch of the key will change and the stopper will move to a position where it does not contact the hammer shank, and during normal play that produces a sound by striking the strings, the escaped power will decrease due to an earlier escape. However, since the impact force of the hammer is weakened, the tone produced by striking the strings becomes a little softer. In other words, it had a touch like a harpsichord. In addition, the repeated hitting property of the keyboard was somewhat deteriorated.

Therefore, as a method of solving such a problem, the present applicant selectively inserts a flexible spacer between the small jack and the regulating button at the time of non-string striking performance, and A keyboard instrument that allows the player to escape from the hammer assembly earlier than during normal playing, thereby switching between non-string playing and normal playing that do not generate a stringing sound without impairing the key touch feeling. It has already been proposed (Japanese Patent Application No. 4-215400). However, even if this keyboard instrument is suitable for the grand piano, when it is applied to the upright piano, there is a back check wire and bridal wire in front of the jack and the regulating button (on the player side). Therefore, there is a problem that it is not possible to secure a sufficient space for disposing the spacer.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and its purpose is to have a relatively simple structure and to be used in both normal playing and non-string playing. To provide a suitable keyboard instrument to be applied to an upright piano where a good key touch feeling and a stable string striking action can be obtained, and especially a sufficient space in front of the jack and the regulating button cannot be secured. It is in.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the first invention comprises a hammer assembly that strikes a string, a jack that pushes up the hammer assembly, a regulating assembly that causes the jack to escape from the hammer assembly while striking a string, and the like. In a keyboard instrument equipped with an action mechanism in which a hammer strikes a string by operating in conjunction with key operation, a means for changing the distance between the small jack and the regulating button of the jack, and moving this changing means The movement of the hammer assembly does not prevent the hammering operation of the hammer assembly during normal performance, and prevents the hammer assembly from rotating immediately before the hammer hits the string during non-stringing performance. And a changing means, and the changing means is movably mounted on the outer circumference of the jack. It is one in which accelerated than in the normal play escapement timing of the jack by being interposed between the regulating quenching button and Jack small during non-string-striking performance.

A second invention comprises a hammer assembly for striking a string, a jack for pushing up the hammer assembly, a regulating assembly for escaping the jack from the hammer assembly during a string striking operation, and the like, which is interlocked with a key depression operation of a keyboard. In a keyboard instrument equipped with an action mechanism in which a hammer strikes a string by operating it, the means for changing the distance between the small jack and the regulating button, the means for moving the changing means, and the movement And a blocking means that does not prevent the hammer assembly from striking the string during normal performance, and that prevents the hammer assembly from rotating immediately before the hammer strikes the string when not playing. And the changing means is movable in an insertion hole formed through the jack. It is inserted and arranged, and is inserted between the regulating button and the small jack during non-string striking, so that the escape time of the jack can be made earlier than during normal playing.

A third invention comprises a hammer assembly for striking a string, a jack for pushing up the hammer assembly, a regulating assembly for escaping the jack from the hammer assembly during a string striking operation, and the like, which is interlocked with the key depression operation of the keyboard. In a keyboard instrument equipped with an action mechanism in which a hammer strikes a string by operating it, the means for changing the distance between the small jack and the regulating button, the means for moving the changing means, and the movement And a blocking means that does not prevent the hammer assembly from striking the string during normal performance, and that prevents the hammer assembly from rotating immediately before the hammer strikes the string when not playing. And the changing means extends commonly to a plurality of action mechanisms. The regulating member has a slide member movably arranged in the longitudinal direction of the regulating rail and a plurality of spacers arranged on the slide member so as to correspond to the regulating assembly of each action mechanism. When the string is played, the spacers are interposed between the regulating button of each action mechanism and the small jack, so that the escape time of the jack can be made earlier than in the normal playing.

A fourth invention comprises a hammer assembly for striking a string, a jack for pushing up the hammer assembly, a regulating assembly for escaping the jack from the hammer assembly during a string striking operation, and the like, which is interlocked with a key pressing operation on a keyboard. In a keyboard instrument equipped with an action mechanism in which a hammer strikes a string by operating it, the means for changing the distance between the small jack and the regulating button, the means for moving the changing means, and the movement And a blocking means that does not prevent the hammer assembly from striking the string during normal performance, and that prevents the hammer assembly from rotating immediately before the hammer strikes the string when not playing. And the changing means is a bar standing upright on the pen with the jack. It is slidably fitted to the check wire and is inserted between the regulating button and the small jack when playing a string, so that the escape time of the jack can be made earlier than during normal playing. is there.

[0012]

[Action]

 In the keyboard instrument according to the present invention, the means for changing the escape time of the jack earlier than that during normal performance by interposing between the regulating button and the small jack during non-string striking is jack, regulating Direct mounting on the assembly or bridle wire minimizes installation space for the modification means. When the changing means is moved to switch from the normal playing state to the non-string playing state, the distance between the regulating button and the small jack is substantially reduced. Further, in cooperation with this, the blocking means operates, and immediately before the hammer hits the string, the hammer is moved or switched to a position that blocks the rotation of the hammer assembly. Therefore, when the jack moves up and abuts the regulating button as the key is pressed, the escape time of the jack is accelerated. The hammer assembly is pushed up by the jack to rotate, but hits the blocking means to prevent further rotation, so that the string is not struck and non-strike performance is enabled.

[0013]

【Example】

 Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 is a side sectional view of an action mechanism section in a normal performance when the present invention is applied to an upright piano, and FIG. 2 is an enlarged side sectional view of an essential part in a non-string striking performance. 3 is a perspective view of the jack and the changing means. In these drawings, the upper and lower ends of the string 1 of each pitch are locked to a frame (not shown) via tuning pins and frame pins, and are stretched substantially vertically with a predetermined tension. In front of the string 1 (on the player's side), a center rail 2 that extends in common for all strings 1 is arranged above the rear end of the key 3, and the center rail 2 An action mechanism 4 that operates in conjunction with the keyboard 3 to strike the corresponding string 1 and a damper mechanism 5 are provided.

The action mechanism 4 has a long whippen 8 in the front-rear direction in which a base end is pivotally supported in a vertical direction via a pin 7 at a lower end of a whip pen flange 6 fixed to a lower end of the center rail 2. Is equipped with. The whip pen 8 is normally held substantially horizontally by placing a whip pen heel 8A integrally provided on the lower surface on the free end (front end) side on a capstan 9 planted on the upper surface of the rear end of the keyboard 3. ing. In addition, a jack 10 is arranged in the approximate center of the upper surface of the whip pen 8. The jack 10 is formed in an L shape in a side view, and its lower end bent portion is supported by a jack flange 11 projecting on the upper surface of the whip pen 8 via a pin 12 so as to be rotatable in the front-rear direction. The jack spring 13 gives the habit of turning clockwise in FIG. 1, and the upper surface 110 of the one arm 10A extending upward abuts the front end portion of the lower surface of the bat 15 constituting the hammer assembly 14 to extend horizontally. The arm 10B forms a small jack.

The hammer assembly 14 is a butt flange 16 fixed to a shoulder portion of the center rail 2, and the butt 15 is rotatably arranged in the front-rear direction via a center pin 17, and the bat 15 The hammer 18 is arranged on the upper surface of the bat 15 through the hammer shank 19, the catcher 21 is arranged on the front surface of the bat 15 through the catcher shank 20, and the bat 15 is attached in the returning direction (counterclockwise direction in FIG. 1). It is composed of a butt spring 22 for urging, etc., and the hammer shank 19 is normally held in the initial position by abutting the hammer shank 19 via the felt 24. When the whip pen 8 is pushed up by the capstan 9 by the operation of depressing the keyboard 3, and the pin 7 pivots in a clockwise direction about the pin 7, the jack 10 pushes up the butt 15 from below and the hammer assembly 14 in the clockwise direction. It is rotated, and thereby the hammer 18 strikes the string 1 corresponding to the pressed keyboard 3. During the string striking operation, the jack 10 moves against the jack spring 13 as the small jack 10B comes into contact with the regulating button 26 of the regulating assembly 25 to prevent its upward movement during the upward movement. The jack 10 is pivoted in the clockwise direction, whereby the upper end of the jack 10 temporarily escapes from the lower part of the bat 14. This escape time is set when the hammer 18 approaches the string 1 by about 2 to 3 mm during normal playing. Then, the jack 10 pivotally returns in association with the pivoting lowering of the whip pen 8 accompanying the return operation of the keyboard 3 after the string striking operation by the hammer 18, so that one arm 10A thereof is again brought to the lower part of the bat 15. It enters and enables the next string striking action.

The regulating assembly 25 includes a 88-key action mechanism 4 which is grouped into a plurality of action mechanisms 4 and which is cross-extended for each of a plurality of sections, and a jack 10 of each action mechanism 4. A plurality of regulating buttons 26 arranged on the regulating rail 27 via a regulating screw 28 corresponding to a small jack 10 B, and a plurality of regulating brackets holding the regulating rails 27. The regulating bracket 29 is screwed and fixed to a protrusion 2A protruding from the center of the front surface of the center rail 2. The distance d between the regulating button 26 and the small jack 10B is set to about 3 to 5 mm during normal playing, and the hammer 18 is moved by the changing means 51, which will be described later, in the non-string striking performance shown in FIG. The distance is changed to a distance d ′ at which the jack 10 escapes from the bat 15 when approaching the string 1 by about 8 to 15 mm. This distance d'is about 1 to 3 mm. When the regulating screw 28 is rotated, the distance d to the small jack 10B is finely adjusted. When the distance d is large, the escape time of the jack 10 is delayed, and when it is small, the distance is early.

Graphite is applied to the upper surface 110 of the jack 10 to improve sliding with the bat 15, and similarly, graphite is applied to the surface of the small jack 10B to improve sliding with the regulating button 26. Has been done. A bat skin 34 is fixed to the lower surface of the bat 15, and a regulating button punching 35 is fixed to the lower surface of the regulating button 26.

As shown in the drawing, a back check wire 31 and a bridle wire 32 are further planted on the upper surface of the whip pen 8 on the free end side at a front side of the keyboard 3 with a predetermined angle inclination. A back check 33 is provided at the upper end of the back check wire 31 to elastically receive the catcher 21 of the hammer assembly 14 which is rotated and returned by the repulsive force of the string 1 and the force of the butter spring 22 after the striking operation. . The catcher 21 and the bridle wire 32 are connected to each other by a bridle tape 33, whereby the rotation return of the hammer assembly 14 is made to follow the rotation return of the wipen 8, and the hammer assembly 14 bounces and the string 1 is moved. The hammer is prevented from hitting twice and the hammer assembly 14 is returned to its initial position quickly.

The damper mechanism 5 has an intermediate portion pivotally supported in the front-rear direction via a pin 37 on a damper lever flange 36 provided on the upper surface of the center rail 2, and a damper lever spring 38. The damper lever 39 is provided with a clockwise turning habit, and the damper 41 is disposed on the upper end of the damper lever 39 via a damper wire 40. The damper 41 normally prevents the free vibration of the string 1 by being pressed against the string 1 by the spring force of the damper lever spring 38, so that when the keyboard 3 is pressed, the upper surface of the base end portion of the wippen 8 is prevented. The planted damper spoon 42 is configured to separate from the string 1 by pressing and rotating the lower end of the damper lever 39 against the damper lever spring 38. Then, after the damper 41 is separated, the hammer 18 strikes the string 1 to enable normal performance. The action mechanism 4 and the damper mechanism 5 described above are exactly the same as the action mechanism and the damper mechanism of the conventional upright piano.

Now, the present invention is provided with a device that enables non-string striking performance that does not generate a string striking sound without impairing the key touch feeling during the normal performance described above, that is, a muffling device 50. This muffling device 50 is movably attached to the jack 10 in the front-rear direction during non-striking performance, and is interposed between the small jack 10B and the regulating button 26 so that the distance d in the normal performance is maintained. Changing means 51 for changing the distance to the distance d'for non-striking performance, means 52 for moving the changing means 51 back and forth, and the moving means 52, which operates in cooperation with the hammer assembly 1 during normal performance. 4 is provided in a position or in a state where it does not prevent the string striking operation of the string 4 and blocks the rotation of the hammer assembly 14 immediately before the hammer 18 hits the string 1 in the non-striking performance.

The changing means 51 is, as shown in FIG. 3, a box-shaped slide member 54 whose upper and lower surfaces are open and which is long in the front-rear direction, and a flexible member such as a felt disposed on the lower front portion of the slide member 54. The slide member 54 is fitted into the lower part of the bowl 10A of the jack 10 from above, and is positioned by a slide guide 56 so as to be movable back and forth. The slide guides 56 are formed in a plate shape having an appropriate plate thickness and are fixed in parallel to each other on both side surfaces of the bowl 10A, and the side plates 54a and 54b of the slide member 54 are positioned between them. ing . Further, a reverse L-shaped bent portion 57 bent downward is integrally provided at the rear end of the slide member 54, and the movable portion is moved to a space between the bent portion 57 and the slide member 54. A part of the means 52 is inserted from below.

In FIG. 1, the moving means 52 is transversely extended in the space between the center rail 2 and the jack 10 so as to extend commonly to all the action mechanisms 4, and both ends thereof are rotatable. The shaft 60 is supported by a substantially horizontal shaft 60, and this shaft 60 has an operating portion 61 integrally provided on a part of the peripheral surface over substantially the entire length. The operation portion 61 is inserted from below into the space between the rear surface of the slide member 54 and the bent portion 57. A felt 62 is attached to the surface of the operation unit 61. In the normal playing state shown in FIG. 1, when the shaft 60 is rotated counterclockwise by a predetermined angle, the ridge portion 61 pushes the slide member 54 forward, so that the spacer 55 is moved to the jack as shown in FIG. It can be interposed between the small 10B and the regulating button 26, whereby the distance d is changed to the distance d '(distance between the regulating button 26 and the spacer 55), and the mode is switched to the non-string playing state. To be Any means can be used to rotate the shaft 60. For example, an appropriate lever is provided on the lower surface of the shelf board 70 (FIG. 1) on which the keyboard 3 is arranged, and the lever is manually operated to rotate the shaft 60. Alternatively, a pedal may be provided on the lower part of the front surface of the musical instrument main body, and the shaft 60 may be rotated by stepping on the pedal, or the shaft 60 may be rotated by a drive motor.

The blocking means 53 extends transversely between the hammer assembly 14 and the strings 1 so as to extend in common over all the strings 1, and has a substantially horizontal shaft whose both ends are rotatably supported. 71 and a cushion 72 fixed to a part of the peripheral surface of the shaft 71. When the normal playing state is switched to the non-string playing state (or vice versa), the shaft 71 rotates in conjunction with the shaft 60. Configured to be moved. In this case, the shaft 71 is held in a position where the cushion 72 does not prevent the hammer assembly 14 from striking the strings in the normal playing state, that is, a position in which the cushion 72 is directed downward as shown by the solid line in FIG. Then, as shown by the two-dot chain line in FIG. 1, the cushion 72 is rotated about 90 ° in the clockwise direction, and the cushion 72 is set and held at a position facing the hammer shank 19. When the shaft 60 is rotated by a lever or a pedal, the rotation of the shaft 60 and 71 is transmitted to the shaft 71 through an appropriate rotation transmission mechanism such as a gear, or when the lever or the pedal is operated. Various methods are possible, such as driving a drive motor and rotating the shaft 71 by this motor.

Next, the operation of the above-described configuration during a non-string striking performance will be described. When the moving means 52 is rotated clockwise in FIG. 1 to move the changing means 51 forward, the spacer 55 is interposed between the small jack 10B and the regulating button 26 to change the distance d to d '. . In addition, the blocking means 53 operates in conjunction with the moving means 52 to make the felt 72 face the hammer shank 19. As a result, the normal playing state shown in FIG. 1 is switched to the non-string playing state shown in FIG. Opposite the hammer shank 19. When the keyboard 3 is pressed in this state, the capstan 9 raises and rotates the whip pen 8 clockwise, so that the jack 10 also rises together with the whip pen 8 and pushes up the bat 15 to push the hammer assembly 14 clockwise. Rotate. At this time, the distance d'between the small jack 10B and the regulating button 28 is set to be smaller than the distance d during the normal performance by the spacer 55, so that the small jack 10B is regulated more than the normal performance. The butt 15 is quickly brought into contact with the chin button 26 to prevent it from rising, and is rotated counterclockwise to escape from the lower portion of the bat 15. This escape time is set when the hammer 18 approaches the string 1 by about 8 to 15 mm as described above during non-string striking performance. Therefore, the key pressing force of the keyboard 3 transmitted to the hammer assembly 14 at this time is smaller than that during normal playing. When the bat 15 is pushed up due to the upward movement of the jack 10, the hammer assembly 14 pivotally flies in the clockwise direction and tries to strike the string 1. However, immediately before the hammer 18 hits the string 1, the hammer shank 19 comes into contact with the felt 72 and is prevented from rotating, so that the hammer assembly 14 is repelled without hitting the string 1 and is returned to the initial position. Turn back. Further, the jack 10 also descends in conjunction with the whip pen 8 as described above, the upper end surface thereof re-enters the lower portion of the bat 15, and returns to the initial position. As a result, it is possible to perform a non-string-striking performance in which no string-striking sound is emitted.

Thus, in the keyboard musical instrument having such a configuration, the escapement is performed even in the non-string striking performance, and thus the continuous striking property is good. Further, since the changing means 51 is directly attached to the jack 10, it is not necessary to secure a special space for disposing the changing means 51, and it is particularly suitable for an upright piano. It is possible to realize normal performance and non-string performance with a good key touch feeling and stable string motion.

When a key sensor is provided in advance on the keyboard 3 in the non-string striking state and the tone control circuit is controlled by the operation of the key sensor to generate an electronic sound from the electronic sound source, the touch feeling of the piano is felt. Can be used as an electronic piano without damaging the sound, and if the electronic sound at this time is heard through headphones or produced with a small volume from the speaker, it will cause noise pollution to neighboring residents during the day and at night. There is no.

FIG. 4 is a side sectional view of a main part of a second embodiment of the invention in a normal playing state, and FIG. 5 is an exploded perspective view of a jack and a changing means. In this embodiment, instead of mounting the changing means 51 on the outer side of the jack 10, an inserting hole 80 is formed at the lower end of the one arm 10A of the jack 10 so as to open to the front and rear surfaces thereof, and the changing means 51 is inserted into the inserting hole 80. Is inserted and placed in the front-back movement. The insertion hole 80 is formed in a vertically long shape, and a felt 81 is adhesively fixed to the inner peripheral surface over the entire circumference. The changing unit 51 is composed of a slide member 82 and a spacer 55. The slide member 82 is composed of two metal plates 82A and 82B for facilitating attachment to the insertion hole 80. One metal plate 82A includes a plate portion 82A-1 that is inserted into the insertion hole 80 and is long in the front-rear direction, a plate portion 82A-2 that is provided substantially orthogonal to the front end of the plate portion 82A-1, and this plate. A spacer receiving portion 82A-3 is provided at the lower end of the portion 82B-2 so as to be substantially orthogonal thereto, and the rear end of the spacer 55 is placed and fixed on the spacer receiving portion 82A-3. The other metal plate 82B includes a plate portion 82B-1 that is long in the front-rear direction and is inserted into the insertion hole 80, and a downwardly U-shaped bent portion 83 that is continuously provided at the rear end of the plate portion 82B-1. It consists of and. Then, the plate portions 82A-1 and 82B-1 of both the metal plates 82A and 82B are inserted into the insertion hole 80 and then joined to each other with an adhesive or the like.

The moving means 52 for moving the changing means 51 back and forth and the blocking means (not shown) for blocking the rotation of the hammer assembly 14 are the same as those in the first embodiment, and therefore their explanations are omitted. To do.

With such a configuration, the same effect as that of the first embodiment can be obtained.

FIG. 6 is a side cross-sectional view showing the main part of a third embodiment of the present invention, and FIG. 7 is a plan view showing the positional relationship between the regulating button and the spacer body during normal playing. In this embodiment, a slide member 85 is slidably fitted on the regulating rail 27 in the longitudinal direction thereof, and a spacer 55 is arranged at the lower end of the slide member 85 to constitute the changing means 51. The slide member 85 is formed so as to extend over substantially the entire length of the regulating rail 27 so as to be commonly extended to all action mechanisms, and an action along the regulating rail 27 is performed by a moving means (not shown). It is configured to slide by a half pitch of D (D = 13 mm).

The spacer 55 is formed in a comb-like shape, and extends at a distance of the action division D on one side surface of the connecting base 55A and the connecting base 55A that extends over substantially the entire length of the slide member 85. And a plurality of spacer bodies 55B, and the connecting base portion 55A is adhesively fixed onto a spacer mounting portion 85a provided at the lower end of the slide member 85. Each spacer body 55B is positioned between the adjacent regulating buttons 26 during normal playing as shown in FIG. 7, and is directly below the regulating button 26 as the slide member 85 moves during non-string playing. It is configured to be moved.

Since the moving means for moving the changing means 51 back and forth and the blocking means for blocking the rotation of the hammer assembly are exactly the same as those in the first and second embodiments, the description thereof will be omitted.

Even with such a configuration, the same effects as those of the first and second embodiments can be obtained.

FIG. 8 is a side cross-sectional view of a main part of the fourth embodiment of the present invention during non-striking performance, and FIG. 9 is a perspective view of the changing means. In this embodiment, the changing means 90 is slidably arranged on the back check wire 31, and during normal playing, the changing means 90 is set and held by the moving means 91 at the upper position shown by the chain double-dashed line, and the non-string striking performance is performed. The spacer 55 is sometimes moved to the solid line position so as to interpose the spacer 55 between the small jack 10B and the regulating button 26.

The changing means 90 includes a hollow pipe 93 fitted into the back check wire 31, and a substantially horizontal plate-like operation portion 94 and a spacer attaching portion 95 are respectively provided at the centers of the outer peripheral surfaces of the hollow pipe 93. The operation portion 94 is vertically projected by the moving means 91, and the front end portion of the spacer 55 is adhesively fixed onto the spacer mounting portion 95. The operating portion 94 is provided so as to project toward the left front of the bridle wire 32 as viewed from the player in order to avoid interference with the bridle wire 32. Any means such as a lever or a drive motor may be used as the means for operating the moving means 91, as in the first, second and third embodiments described above.

With such a structure, the same effects as those of the first, second, and third embodiments can be obtained.

In the first embodiment, the blocking means 53 is arranged between the hammer assembly 14 and the string 1 so as to receive the hammer shank 19 during the non-string striking performance. Of course, the catcher shank 20 or the catcher 21 may be provided above the catcher shank 20 or the catcher shank 20 to receive them. Further, in the above embodiment, the shaft 60 of the moving means 52 is composed of one shaft extending in common for all 88 keys, but a plurality of shafts formed separately for low, middle, and high pitches are used. Alternatively, they may be integrally rotated in the same direction and at the same angle.

[0038]

[Effect of device]

 As described above, in the keyboard instrument according to the present invention, the changing means for changing the distance between the small jack and the regulating button is directly attached to the jack, the regulating assembly or the bridle wire. This is suitable for upright pianos that do not require a special space for installing the instrument, and in particular can hardly secure the installation space in front of the jack unlike the grand piano. Further, the structure is relatively simple, and it is possible to enjoy a normal performance and a non-string-playing performance in which no string-striking sound is generated without impairing the touch feeling of the keys.

[Brief description of drawings]

FIG. 1 is a side sectional view of an action mechanism section during a normal performance showing a first embodiment when the present invention is applied to an upright piano.

FIG. 2 is an enlarged side cross-sectional view of a main part at the time of non-striking performance.

FIG. 3 is a perspective view of a jack and a changing unit.

FIG. 4 is a side sectional view of an essential part of a second embodiment of the present invention in a normal playing state.

FIG. 5 is an exploded perspective view of a jack and a changing unit.

FIG. 6 is a side sectional view of a main part of a third embodiment of the present invention.

FIG. 7 is a plan view showing a positional relationship between a regulating button and a spacer body during a normal performance.

FIG. 8 is a side sectional view of an essential part of a fourth embodiment of the present invention during non-striking performance.

FIG. 9 is a perspective view of a changing unit.

[Explanation of symbols]

 1 String 2 Center Rail 3 Keyboard 4 Action Mechanism 5 Damper Mechanism 10 Jack 10B Jack Small 14 Hammer Assembly 15 Butt 18 Hammer 19 Hammer Shank 25 Regulating Assembly 26 Regulating Button 31 Bridle Wire 50 Silencer 51 Change Means 52 Moving Means 53 Blocking Means 54 Sliding member 55 Spacer 80 Insertion hole 82 Sliding member 85 Sliding member 90 Changing means 93 Hollow pipe

Claims (4)

[Scope of utility model registration request] 1. A hammer assembly for striking a string, a jack for pushing up the hammer assembly, a regulating assembly for ejecting the jack from the hammer assembly during a string striking operation, etc. In a keyboard instrument having an action mechanism in which a hammer strikes a string, a means for changing the distance between the small jack and the regulating button of the jack, a means for moving the changing means, and an interlocking operation with the moving means. It operates and does not prevent the hammer assembly from striking strings during normal performance,
Blocking means for blocking the rotation of the hammer assembly immediately before the hammer strikes the string when playing a string, and the changing means is movably mounted on the outer circumference of the jack, and the changing means is arranged when the string is played. A keyboard instrument characterized in that the escape time of the jack is set earlier than that during normal performance by being interposed between the ching button and the small jack. 2. A hammer assembly for striking a string, a jack for pushing up the hammer assembly, a regulating assembly for escaping the jack from the hammer assembly during a string striking operation, etc. In a keyboard instrument having an action mechanism in which a hammer strikes a string, a means for changing the distance between the small jack and the regulating button of the jack, a means for moving the changing means, and an interlocking operation with the moving means. It operates and does not prevent the hammer assembly from striking strings during normal performance,
Blocking means for blocking the rotation of the hammer assembly immediately before the hammer hits the string during string-playing, and the changing means is movably inserted in an insertion hole formed through the jack. A keyboard musical instrument characterized by being inserted between the regulating button and the small jack during string striking so that the escape time of the jack can be made earlier than during normal playing. 3. A hammer assembly for striking a string, a jack for pushing up the hammer assembly, a regulating assembly for escaping the jack from the hammer assembly during a string striking operation, etc. In a keyboard instrument having an action mechanism in which a hammer strikes a string, a means for changing the distance between the small jack and the regulating button of the jack, a means for moving the changing means, and an interlocking operation with the moving means. It operates and does not prevent the hammer assembly from striking strings during normal performance,
Blocking means for blocking the rotation of the hammer assembly immediately before the hammer strikes the string during string-playing, and the changing means is provided on the regulating rail so as to extend in common for a plurality of action mechanisms. It consists of a slide member movably arranged in the longitudinal direction and comb-teeth shaped spacers arranged on the slide member, and the spacer is used for the non-string-striking performance of the regulating mechanism of each action mechanism and the jack small. A keyboard instrument characterized in that the escape time of the jack can be made earlier than that during normal performance by being interposed between the keyboard instrument and the keyboard. 4. A hammer assembly that strikes a string, a jack that pushes up the hammer assembly, a regulating assembly that causes the jack to escape from the hammer assembly during a string striking operation, etc. In a keyboard instrument having an action mechanism in which a hammer strikes a string, a means for changing the distance between the small jack and the regulating button of the jack, a means for moving the changing means, and an interlocking operation with the moving means. It operates and does not prevent the hammer assembly from striking strings during normal performance,
Blocking means for blocking the rotation of the hammer assembly immediately before the hammer strikes the string when playing a string, and the changing means is slidable on the back check wire standing on the whip pen together with the jack. A keyboard musical instrument, which is mounted on the keyboard and is interposed between the regulating button and the small jack when a string is not being played, so that the escape time of the jack can be made earlier than in the normal playing.