DE10311933A1 - Hammer stopper with a position adjusting device arranged thereon and keyboard musical instrument with the same device - Google Patents

Abstract

A hammer stopper is built into a silent piano; the hammer stopper comprises a shaft (101A '/ 101B') which rotates between a free position in which a hammer is allowed to strike a string (206) of the piano and a blocking position, the strings (206) being struck by the To retain the hammer (234) and an adjustable abutment absorber (2A / 2B) disposed thereon, for receiving the hammer handle (234c) when the shaft (101A '/ 101B') is in the blocking position; a position adjusting device (10A / 10B) is provided in the adjustable impact absorber for adjusting the impact absorber, so that a worker can easily assemble the hammer stopper with an acoustic piano (1) without having to disassemble the keyboard or the effective units.

Description

Field of the Invention

This invention relates to a keyboard musical instrument, and in particular on a composite keyboard musical instrument such as a Silent piano for the selective generation of acoustic tones and electric tones and a silent system built into the silent piano.

Description of the relevant prior art

An acoustic piano generates tones by vibrating strings. On Player depresses a key to create a built-in acoustic piano Key mechanism to operate. The key mechanism moves the hammer arrangement in Rotation, and the hammer strikes the string to stop the vibration cause.

There is another type of piano that is capable of acoustic tones and to produce electric tones. Such a type of compound Keyboard musical instruments is referred to as a silent piano. The silent piano is equipped or provided with a hammer stopper. If a player has a he wishes to play musical harmony with acoustic tones Silent piano to put the hammer stopper in a free position. thereupon becomes the hammer stopper from the tracks of the hammers of the silent piano brought so that the hammer stopper does not stop the movement of the hammers with special needs.

On the other hand, when the player presses the buttons without audible tones wishes, he or she puts the composite keyboard musical instrument like this that the hammer stopper changes to a blocking position. Then will the hammer stopper moves into the movement path of the hammers. In this Situation, even if the player moves the keys on the keyboard, they bounce Hammer off the hammer stopper before striking the strings and thereby any acoustic sound is generated. A set of button sensors monitors the keys and periodically transmits the current key positions a control device. The control device analyzes the Position data information to see if the player depresses any of the keys or let go. If the control device determines that the player has a button depressed, the controller generates music data codes that are representative are for an electronic sound to be generated, and the electronic sound is generated by headphones or a loudspeaker. If on the other hand the control device determines that the player releases the button, the controller generates a music data code representative of the The electronic sound fades away and the electronic sound fades away. Consequently the silent piano allows the player to press the keys without the Impair or disrupt neighborhood. The status being the Players who are allowed to play acoustic tones are hereinafter referred to as "acoustic tones Sound mode ", and the status the player is allowed to pressing the keys without acoustic tones is called "silent" mode " ("silent mode") called.

The acoustic pianos allow the player a unique Keystroke. When a player hits a key, the associated one Key mechanism rotates and begins to hammer the associated one Turn the flange or capsule around. The jack comes from that associated hammer freely when the rotating button mechanism connects the jack with the Triggers in contact. After the completion of the release begins the hammer to turn freely. For this reason, the hammers should Bounce hammer stoppers back before striking the strings. The Releasing the hammer causes the player to press the keystroke as feels unique.

The hammer stopper is between the point of release and that Arrange anchor point. If the hammer stopper is near the point of the Arranged free, the hammer handle tends to be released to get caught between the jack and the hammer stopper. When the hammer stopper is placed near the strings, it strikes Hammer the strings on the hammer stopper before rebounding, so that the acoustic tone is generated even if it is not desired. The position of the Hammerstoppers must be set in the appropriate position. So is the position of the hammer stopper is an important factor for the silent piano.

Figs. 1 and 2 show an example of a hammer stopper incorporated in the conventional silent piano, the Japanese Laid-open patent application no. 7-191665 is described. In this case the silent piano is a grand piano. The key mechanisms (not shown here), the hammers H and the strings S are installed within a piano housing PC. Although not shown in the figures, a wooden frame and key bed define the bottom of the piano case PC, and legs extend down from the wooden frame and key bed. A side board 104 defines the perimeter of the piano case PC and gives the piano case PC the appearance of a grand piano. The side board 104 includes a curved part and straight parts. The straight parts run parallel from the two ends of the curved part parallel to the front.

Reference numeral 100 denotes the hammer stopper according to the prior art. The hammer stopper 100 runs laterally in the space between the arrangement of the hammers H and the strings S and is rotatably supported by the straight-line parts of the side boards 104 . In combination, the hammer stopper 100 forms a silent system SS together with a transmission system 110 . The transmission system 110 transmits a force to the hammer stopper 100 , and the force causes the hammer stopper 100 to rotate between a free position and a blocking position.

The hammer stopper 100 is divided into two parts 100 A and 100 B. The right portion 100A is associated with the hammers 234 associated with the strings 206 in the high and middle registers and is rotated by the transmission mechanism 110 . On the other hand, the left part is 110 B assigned to the hammers 234, which are associated with the strings 206 in the low registers, and is also set in rotation by the transmission mechanism 110th The right part 100 A and the left part 1008 of the hammer stopper 100 each comprise rotary shafts 101 A / 101 B, each shock absorber 102 A / 102 B and pairs of bearing units 106 A / 106 B and 106 C / 106 D. The shock absorbers 102 A / 102 B consist of first pillow layers 102 Aa / 102 Ba, which are attached directly to the shafts 101 A and 101 B, and from second pillow layers 103 A / 103 B, which are attached to the surface of the first pillow members 102 Aa / 102 Ba are. The shock absorber 102 A, the shaft 101 A and the pair of bearing units 106 A / 106 B form the right part 100 A of the hammer stopper 100 in combination. The other shock absorber 1028 , the shaft 101 B and the pair of bearing units 106 C combine to form the left part 1008 of the hammer stopper 100 . In this case, the self-aligning bearing units are used as the pairs of bearing units 106 A / 106 B and 106 C / 106 D.

In Fig. 2, reference numeral 107 denotes a protrusion. The protrusion 107 is formed on the iron plate to prevent deformation. The projection 107 protrudes into the space that is to be occupied by the hammer stop 100 . This means that the projection 107 is an obstacle to the installation of the hammer stopper 100 . The assembler installs the right part 100 A on the right side of the protrusion 107 and the left part 1008 on the left side of the protrusion 107 .

In detail, a bracket 105 B is attached to the projection 107 . The bracket 105 B is designed like a channel and has flanges (eaves) 105 Ba / 105 Bb. The flanges 105 Ba / 105 Bb project laterally from the channel-shaped body 105 Bc. Thus, the flanges 105 Ba / 105 Bb are provided on both sides of the protrusion 107 . The projection 107 is provided in the space of the channel-shaped body 105 Bc. Bolts 105 Bd ensure that the channel-shaped body 105 Bc holds the projection 107 in place . When the bolts 105 Bd are loosened, the bracket 105 (actually: " 105 B") becomes movable so that a worker can change the relative position between the holder 105 (actually: " 105 B") and the projection 107 . Thus, the bracket 105 B clamps the projection 107 in any position.

The brackets 105 A are fastened to the inner surfaces of the rectilinear parts of the side board 104 by means of bolts 105 a. One of the brackets 105 A is attached to the rectilinear part. The other bracket 105 A is also attached to the other rectilinear portion, in a manner similar to the bracket shown in FIG. 1, 105 A. The arms 105 A are arranged laterally spaced from the flanges 105 Ba and 105 Bb. In the following description, the bracket 105 A shown in FIG. 1 is referred to as "right bracket 105 A", and the other bracket 105 A (not shown here) is referred to as "left bracket 105 A".

The bearing units 106 A / 106 B are each attached to the right bracket 105 A and the flanges 105 Bb for the shaft 101 A. The shaft 101 A is rotatably supported by the bearing units 106 A / 106 B. Similarly, the bearing units 106 C / 106 D for the other shaft 101 B are each on the flanges 105 Ba and the left bracket 105 A for the shaft 101 B. attached. The shaft 101 B is rotatably supported by the bearing units 106 C / 106 D. Thus, the shafts 101 A / 101 B are supported independently of one another between one of the rectilinear parts of the side board 104 and the protrusion 107 and between the protrusion and the other rectilinear Part. Although the projection 107 protrudes into the room, the split hammer stopper 100 , that is to say the parts 100 A / 100 B, is installed or arranged inside the piano housing PC.

The only transmission system 110 is provided for both the right and the left part of the hammer stopper 100 . This means that the transmission system 110 is expected to transmit the power to both the right and left portions 100 A / 100 B. In order to transmit the force in parallel to the right and left parts 100 A / 100 B, the transmission system 110 has the following scheme. Side webs 114 are fastened to the right end of shaft 101 A and to the left end of shaft 101 B, respectively. Slits are formed in each of the side webs 114 . The transmission system 110 further includes a holder 111 , wires 112 A / 112 B and an operating button 113 . The wires 112 A / 112 B pass through the holder 111 . The wires 112 A / 112 B are connected at one end to the operation button 113 . The other ends of the wires 112 A / 112 B are connected to the side webs 114 , which are fastened to the rotary shafts 101 A and 101 B of the hammer stopper 100 .

When the player pulls the actuation button 113 toward them to switch the hammer stopper 100 to the silent mode, the wires 112 A / 112 B are pulled down and rotate the shafts 101 A / 101 B clockwise. The shock absorbers 102 A / 102 B are turned clockwise and at the same time lie opposite the hammer handles 234 c. The hammer stopper 100 thus moves into the movement paths of the hammers 234 . On the other hand, when the player changes the hammer stopper 100 to the free position, he or she pushes the operation button 113 into the holder 111 . Then, return springs (not shown here) rotate the right part 100 A and the left part 1008 counterclockwise, and the shock absorbers 102 A / 102 B are moved out of the trajectories of the hammers 234 .

One problem with the prior art silent piano is the adjustment of hammer stopper 100 , hammers 234, and strings 206 . The setting of the hammer stopper 100 is complicated because the assembly workers try to find a suitable position for the individual parts 100 A / 100 B of the hammer stopper 100 according to the "trial and error" principle. First, the assembly worker fastens one of the brackets 105 A with the screws 105 a to the rectilinear part of the side board 104 . Next, the assembler slides the bracket 105 B on the side surfaces of the protrusion 107 and fixes the bracket 105 B to the protrusion 107 at a certain position according to the current position of the bracket 105 A. The shafts 101 A or 101 B become with the bearing units 106 A / 106 B or 106 C / 106 D assembled at both ends thereof. The bearing units 106 A / 106 B or 106 C / 106 D are attached to the right / left bracket and the associated flanges 105 A / 105 Bb.

Upon completion of the temporary assembling work towards the assembly worker checks the right or left part 100 A / 100 B in terms of relative position to the hammers and strings 234/206. The assembler returns the keyboard and key mechanisms to a key bed in the appropriate position and depresses or strikes the keys to check the right / left part 100 A / 100 B for the relative position in the silent mode. If the right / left part 100 A / 100 B is not installed properly, the keystroke is strange or strange, or the hammer is jammed between the jack and the right / left part 100 A / 100 B. The right / left part 100 A / 100 B must be changed from the current position to an appropriate position. The assembly worker removes the keyboard and key mechanisms from the key bed. The assembly worker loosens the 105 a / 105 Bd screws and moves the 105 A / 105 B brackets up or down to place the 105 A / 105 B brackets in other positions. The assembly worker temporarily tightens the screws 105 a / 105 Bd and brings the keyboard and key mechanisms back onto the key bed. The assembler presses the buttons to check the right / left part 100 A / 100 B for the relative position in the silent mode. Thus, the assembly worker searches for the appropriate position for each of the right and left parts 100 A / 100 B of the hammer stopper 100 according to the principle of "trial and error"("trial&error"). When the assembly worker finds out that the right and left parts 100 A / 100 B are installed correctly, he finally pulls the screws 105 a / 105 Bd into the brackets 105 A / 105 B. Adjustment work is therefore time-consuming and increases the production costs of the silent piano.

Summary of the invention

It is therefore an important object of the present invention to provide one To create a hammer stopper that an assembly worker can easily adjust to the appropriate or sets the correct position to the hammers and strings.

It is also an important object of the present invention to provide a Compound keyboard musical instrument to create the hammer stopper is equipped.

According to one aspect of the present invention is a hammer stopper provided that is used in a piano having hammers and strings, to be struck with the associated hammers, and the following comprises: a shaft which is rotatable between a free position around the Allow hammering to strike the associated strings, and one Locking position to close the strings before the associated hammers stop preserve, and a shock absorber that has a surface that is in the free Position at certain positions outside the trajectory of the The hammers remain and in the blocking position causes the hammers on the Bounce back without striking the strings and the shock absorber further comprises a position adjusting device which is connected to the shaft Adjust the surface to a relative position to the hammers and strings connected is.

According to another aspect of the present invention is a A composite keyboard musical instrument is provided, comprising: a Keyboard that includes a variety of keys, each between Rest positions and end positions are moved; a variety of Key mechanics, which are each connected to the multiple keys and the keys, which are moved to the end positions are selectively operated; a Variety of strings, each associated with the variety of buttons Generation of tones by vibrations; a variety of hammers that are each associated with the variety of strings and through the variety of selectively operated key mechanisms are selectively rotated and on At the end of the rotation, strike the associated strings to produce the notes; a hammer stopper intended for the plurality of hammers and one Includes wave that is changed between a free position to the Allow multiple hammers to strike the associated strings, and one Blocking position to allow the hammers to bounce off before they hit striking associated strings: and a shock absorber connected to the shaft and has a surface on which the plurality of hammers in the Blocking position rebounds, the shock absorber also a Position adjusting device, which is movably connected to the shaft, namely to adjust the surface to a position relative to the hammering and the strings.

Brief description of the drawing

The features and advantages of the hammer stopper and the composite Keyboard musical instruments emerge more clearly from the following description in connection with the attached drawing. Show it:

Fig. 1 is a perspective view showing the structure of a grand piano of the silent-type according to the prior art;

Fig. 2 is a perspective view showing a split hammer stopper installed in a silent piano according to the present prior art;

Fig. 3 is a side view showing the structure of a grand piano of the silent-type according to the present invention;

Fig. 4 is a perspective view showing a hammer stopper according to the present invention;

Fig. 5 is a sectional view showing the hammer stopper according to a first embodiment of the present invention;

Fig. 6 is a perspective view showing the hammer stopper according to the first embodiment of the present invention;

FIGS. 7A and 7B are plan views of spring rings which are used with the first embodiment of the present invention in accordance with hammer stopper;

. 8A and 8B are a sectional view and a perspective view showing a metal piece to the first embodiment of the present invention is used in the hammer stopper in accordance with;

Fig. 9 is a sectional view showing an adjusting device of the hammer stopper according to the first embodiment of the present invention;

Fig. 10 is a sectional view showing a position adjusting device installed in another composite keyboard musical instrument according to the present invention;

11 is a perspective view showing another hammer stopper, the musical instrument keys with a third embodiment of the present invention is incorporated in accordance with another compound.

FIG. 12 is a sectional view along the section line AA ′ according to FIG. 11, showing the hammer stopper according to the third exemplary embodiment of the present invention;

Fig. 13 is a sectional view taken along the section line BB 'with the representation of the hammer stopper present according to the third embodiment of the invention; and

Fig. 14 is a sectional view of the present with the representation of another hammer stopper according to a fourth embodiment of the invention.

Description of preferred embodiments First embodiment

In the description below, the word "front" means a page that is closer to a player sitting in front of an acoustic piano than one rear position. An expression "direction from front to back" ("foreand-aft-direction") indicates a virtual, between a front (front position) and a rear (rear position) drawn line. A "side Direction "(" lateral direction ") is perpendicular to the" direction from the front to the rear "(" foreand-aft-direction ") and runs parallel to the plane through keys arranged in the rest positions is defined. A "vertical Direction "(" vertical direction ") is perpendicular to both the" lateral direction " ("lateral direction") as well as to the plane passing through in the rest positions arranged keys is defined.

Referring to FIG. 3, a silent piano according to the present invention comprises an acoustic piano 1 and a silent system 200. In this case the acoustic piano 1 is a grand piano and the silent system 200 allows a player to selectively play a piece of music in acoustic tones and electronic tones. When the player selects the acoustic tones, the silent piano is switched to an acoustic tone mode. While the player is playing the acoustic piano 1 , the acoustic piano 1 produces the acoustic tones and the silent system 200 remains inactive. On the other hand, the player does finger exercises without acoustic tones in a silent mode, and the silent system 200 generates the electronic tones instead of the acoustic piano tones. The silent piano is thus switched between the operating mode for acoustic tones and the silent operating mode.

The acoustic piano 1 includes a keyboard 232 elongated in the lateral direction, a plurality of key mechanisms 202 , a plurality of dampers 204 , a plurality of string sets 206 and hammers 234 . Although the acoustic piano 1 further includes a piano case PC ', the piano case PC' will be described in connection with the Siltent system 200 .

Black keys 232 a and white keys 232 b are designed in the known patterns and are rotatable about a balance beam 244 . The notes of a scale are assigned to black / white keys 232 a / 232 b. The sets of strings 206 are vibratable to produce the acoustic tones to which the notes are assigned. Thus, a player specifies the strings 206 by the black / white keys 232 a / 232 b.

The string sets are also associated with the dampers 204 and the dampers 204 are spaced from and brought into contact with the strings 206 , similar to those in a standard grand piano. While the black and white buttons 232 a / 232 b keep the associated dampers 204 at a distance from the associated string sets 206 , the strings 206 are vibratable and can generate the acoustic tones. When the dampers 204 return to their associated string sets 206 , the dampers 204 pick up the vibrations and the acoustic tones decay.

The black / white keys 232 a / 232 b are each associated with the key mechanisms 202 , which in turn are each associated with the hammers 234 . The key mechanisms 202 are provided above the black / white keys 232 a / 232 b, and the black / white keys 232 a / 232 b are each connected to the associated key mechanisms 202 by pilots 248 . When the player depresses a white key 232 b, the struck key 232 b actuates the associated key mechanism 202 in order to set the associated hammer free to rotate by being released. The hammer 234 strikes the string set 206 at the end of the free rotation and bounces off the strings 206 . The player feels the release, which gives his or her fingers the unique keystroke, and the associated string set 206 vibrates to generate the acoustic tone.

The key mechanisms 202 are structurally similar in terms of another key mechanism. Each of the key mechanisms 202 comprises a lifting member 250 , a jack 252 , a repeater arm capsule 254 , a repeater arm 256 and a trigger manikin 258 . The lifting link 250 is rotatably connected at one end to a lifting link capsule 280 and is kept in contact with the associated pilot 248 due to its own weight. The lifter capsule 280 is in turn fixed to a lifter bar 282 , and the lifter bar 282 extends laterally over the rear parts of the black / white buttons 232 a / 232 b. The lifting link bar 282 is held by mechanical jaws 262 , and the mechanical jaws 262 are fastened to holder blocks (not shown here) arranged on a key bed 240 b. Thus, the mechanical jaws 262 and consequently also the lifting link bar 282 are arranged stationary on and above the key bed 240 b, and the lifting link 250 can be rotated around the lifting link capsule 280 .

The repeating leg capsule 254 is fastened to an intermediate part of the lifting member 250 and extends upward from the latter. Repeating leg 256 is rotatably connected to the upper end of repeating leg capsule 254 . A through hole 268 is formed at an end part of the repeating leg 256 . The jack 252 has a leg part 252 A and a foot part 252 B and is rotatably connected at the ankle part to the other end of the lifting member 250 . The leg part 252 A has a front end inserted into the through hole 268 and the foot part 252 B is formed with a projection. A Repetierfeder 260 urges the jack 252 and the repetition lever 256 in the counterclockwise direction constantly so that the jack 252 and the repetition lever 256, the same keep without any relative movement on the whippen 250th

The jack 252 is rotated around the lifter capsule 280 during the rotation of the lifter 250 , and the protrusion is moved on a predetermined trajectory. The trigger manikin 258 is arranged at a certain position on the movement path of the projection and is suspended on the one on the trigger manikin strip 264 . The trigger manikin bar 264 runs in the lateral direction and is also used by other trigger manikins 258 . A hammer handle capsule strip 266 is attached to the mechanical beam 262 and extends laterally over the middle parts of the black / white keys 232 a / 232 b. The trigger manikin 264 is attached to the hammer handle capsule mold 266 , and the trigger manikin 258 can protrude toward the projection and can be withdrawn from the trigger manikin mold 262 (actually: "264"). For this reason, the gap between the release manikin 258 and the projection 252 Ba is variable.

While the player strikes a black / white key 232 a / 232 b, the rear part of the black / white key 232 a / 232 b rises from its rest position and begins to rotate the lifting member 250 counterclockwise. The jack 252 rotates along with the lift member 250 and the protrusion comes closer and closer to the trigger manikin 258 . When the protrusion is brought into contact with the trigger manikin 258 , the reaction rotates the jack 252 clockwise around the distal end of the lifter 250 . Then the jack 252 comes free from the associated hammer 234 and sets the associated hammer 234 in free rotation around a hammer handle capsule 234 a. Since the weight of the hammer 234 is removed from the weight exerted on the pilot 248 , the player feels that the black / white key 232 a / 232 b is light. When released, the player has the feeling of a unique keystroke.

The hammers 234 are also similar in structure to one another. Each of the hammers 234 consists of the hammer handle capsule 234 a, a hammer felt 234 b, a hammer handle 234 c and a hammer roller 234 d. The hammer handle capsule 234 a is attached to the hammer handle capsule strip 266 , and the hammer handle 234 c protrudes from the hammer handle capsule 234 a. The hammer felt 234 b is attached to the front end of the hammer handle 234 c and is opposite the associated string set 206 . The hammer roller 234 d is rotatably connected to the hammer handle 234 c. When the hammers are in their rest positions 234, the hammer rollers 234 d respectively with the upper end surfaces of the legs 252 A kept in contact. When the jack 252 is released from the hammer 234, the hammer roller is triggered 234 d, and the hammer 234 starts to rotate freely.

Suppose a player depresses the front of the white button 232b . Here, the front portion of the white key 232 decreases from b and hence the white key 232 swings b to balance pins around which project from the balance rail 244, and consequently, the rear portion is raised. The capstan 248 presses the elevating member 250 upward and causes the rotation of the lifting member 250 in the clockwise direction around the whippen flange 280 around. The jack 252 and the repeater leg 256 are also rotated about the lifter capsule 280 without any relative rotation between the lifter 250 and the jack 252 / the repeater leg 256 . The jack 252 abuts the hammer roller 234 d and causes the hammer 234 to start rotating around the hammer shank capsule 234 a. The hammer felt 234 b moves to the string 206, and the projection is moved on the movement path of the regulating button 258 down.

When the protrusion has been brought into contact with the trigger manikin 258 , the jack 252 is rotated clockwise around the other end of the lifter 250 to clear the hammer 234 . The hammer roller 234 d is pushed and the hammer 234 begins to rotate clockwise around the hammer handle capsule 234 a. The hammer felt 234 b bounces off the string 206 , or the hammer handle 234 c bounces off a hammer stopper 100 , depending on the operating mode. The acoustic piano 1 thus has a construction similar to that of standard grand pianos. If a player wishes to upgrade the standard grand piano to a silent piano, the silent system is built into the standard grand piano.

The silent system

The silent system 200 comprises a hammer stopper 100 A ', a transmission mechanism 110 A and an electronic tone generation system 220 . The hammer stopper 100 A 'is switched between a free position and a blocking position by means of the transmission mechanism 110 (actually: " 110 A"). The hammer stopper 100 A 'takes the free position in the acoustic tone mode and the blocking position in the silent mode. While the silent piano is operating in the silent mode, the electronic tone generating system 220 detects the key action and generates the electronic tones based on the key action. The tone generation system 220 may be active in the acoustic tone mode.

The electronic tone generation system 220 includes a key sensing system 222 , a processing system 224 , a tone generator 226 and a headphone 228 . The key sensing system 222 is formed by a plurality of photo couplers and associated key shutters. The key covers are attached under the lower surfaces of the black / white keys 232 a / 232 b and are moved back and forth along corresponding movement paths. The photocoupler consists of a photo radiator or light radiator (photo radiator), which is provided on a certain side of the path of movement of the interrupter (shutter) for emitting light beams over the path of movement, and a photodetector or light detector, which is on the other side of the Path of movement of the diaphragm or the interrupter (shutter) for receiving the light rays emitted by the light emitters.

As the black / white buttons 232 a / 232 b move from their rest positions to the end positions, the associated diaphragms interrupt the light beams in succession, and the photocouplers determine the current positions of the diaphragms, i.e. the black / white buttons 232 a / 232 b on the basis of the light rays interrupted by the diaphragms or interrupters. The photocouplers produce key position signals representative of the current key positions and provide the key position signals to the processing system 224 . Processing system 224 analyzes the pieces of position data indicative of changes in the current key positions and decides which electronic tones to generate and decay. Processing system 224 informs tone generator 226 of the electronic tones to be generated and decayed, and tone generator 226 generates an audio signal representative of the electronic tones. The audio signal is provided to the headphones 228 and the electronic sounds are emitted from the headphones 228 .

The transmission mechanism 110 A is formed from a holder 111 A, wires 122 A '/ 112 B' and a button 113 A. The wires 122 A '/ 112 B' running through the holder 111 A are connected at their ends to the button 113 (actually: " 113 A"). The other ends of the wires 122 A '/ 112 B' are connected to the hammer stopper 100 A in a manner similar to that of the hammer stopper 100 according to the prior art. The description is made below of how the transmission mechanism 110 A begins to rotate the split hammer stopper 100 A '.

Fig. 4 shows parts of the piano housing PC 'and the hammer stopper 100 A. The piano housing PC' is structurally similar to the silent piano according to the prior art, so that the parts that in combination form the piano housing PC 'with Reference numerals are designated which identify corresponding parts of the piano housing PC according to the prior art, for the sake of simplicity without a detailed description. A right bracket 105 A and a left bracket 105 A 'are attached to the straight parts of the side board 104 . A bracket 105 B 'clamps the projection 107 by using screws 105 Ba. The bracket 105 B 'has flanges (eaves) 105 Bb / 105 Bc. The right / left brackets 105 A / 105 A 'are each opposite the flanges 105 Bb / 105 Bc or arranged opposite one another.

The hammer stopper 100 A 'is divided into a right part 100 E and a left part 100 F. The right part and the left part 100 E 100 F are respectively assigned to the associated with the high and medium registers and the associated hammers 234 registers with the low hammering 234th Although the protrusion 107 protrudes into the space, the right part 100 E and the left part 100 F independently occupy the space on the right side of the protrusion 107 and the space on the left side of the protrusion 107 , respectively, and the transmission mechanism 110 A starts rotating the right / left parts 100 E / 100 F at the same time.

The split hammer stopper 100 A 'is assumed to be in the blocking position. The right part 100 E and the left part 100 F let the hammers 234 bounce off before striking the strings 206 without pinching the hammer handles 234 c. The split hammer stopper 100 A 'must be set to the appropriate relative position to the hammers 234 and strings 206 . The distance between the axes of rotation and the surfaces on which the hammer handles 234 c bounce is variable, so that the assembly worker can adjust the right / left parts 100 E / 100 F to the appropriate relative position to the hammers 234 and strings 206 , such as is described in more detail below.

The hammer stopper 100 A 'is in the free position in the acoustic tone mode and allows the hammers 234 to strike the associated strings 206 without any interruption. When the player pulls the 113 A button toward (or towards) the player side to select or set the silent mode, the wires 112 A '/ 112 B' move down and displace the waves 101 A / 101 B clockwise rotation. The surfaces on which the hammer handles 234 c rebound are directed downward and enter the movement paths of the hammers 234 .

The hammer stopper 100 A 'in its blocking position causes the hammers 234 to rebound thereon after the jacks 252 are released and before striking the strings 206 . The electronic tone generating system 220 monitors the black / white buttons 232 a / 232 b to see by means of the button sensing system 222 whether or not a player depresses and releases the black / white buttons 232 a / 232 b. The processing system then calculates the speeds of the black / white keys 232 a / 232 b based on the key position signal output of the key sensing system 222 . The tone generating system 226 generates electronic tones with the notes identical to those of the struck keys 232 based on the analysis of the processing system 224 on the pieces of the position data. Thus, the silent piano 100 generates electronic tones without generating acoustic tones by vibrating strings 206 .

hammer stopper

The hammer stopper 100 A 'is divided into the right part 100 E and the left part 100 F. The right part 100 E comprises a rotating shaft 1001 A', an adjustable shock absorber 2 A, a pair of bearing units 106 A '/ 106 B' and a fin or tab 114 '. The bearing units 106 A 'and 106 B' are attached to the bracket 105 A and the flanges 105 Bb and rotatably support the shaft 101 A '. The rotatable shaft 101 A 'extends laterally in the space between the rectilinear part and the projection 107 , and the adjustable shock absorber 2 A is attached to the rotatable shaft 101 A'. The adjustable shock absorber 2 A is itself (per se) at a distance from the shaft 101 A 'and comes closer to it. Thus, the assembly worker can change the relative position between the adjustable shock absorber 2 A and the hammer handles 234 C. The fin 114 'is attached to the rotatable shaft 101 A' and the wire 112 A 'is attached to the fin 114 '. When the button 113 A is pulled, the wire 112 A 'transfers the force to the fin 114 ' and exerts a moment on the shaft 101 A '. This leads to a rotation of the right part 100 E.

Similarly, the left portion 100 F includes a shaft 101 B ', an adjustable shock absorber 2 B, a pair of bearing units 106 C' / 106 D 'and a fin 114 '. The bearing units 106 C 'and 106 D' are attached to the right bracket 105 A 'and the flanges 105 Bc and rotatably support the shaft 101 B' The shaft 101 B 'extends in the space between the straight part and the projection 107 , and the adjustable shock absorber 2 B is on the shaft 101 B 'The adjustable shock absorber 2 B is itself (per se) spaced from and comes closer to the shaft 101 B' so that the assembler can change the relative position between the adjustable shock absorber 2 B and the hammer handles 234 C. . The fin 114 is attached to the rotatable shaft 101 B 'and the wire 112 B is attached to the fin 114 ". When the button 113 A is pulled, the wire 112 B' transmits the Force on the fin or flap 1 14 "and exerts a moment on shaft 101 B '. This leads to the rotation of the right part 100 E.

It is clear that the assembler will adjust the split hammer stopper 100 A 'to the appropriate relative position to the hammers 234 and strings 206 by placing the shock absorbers 2 A / 2 B away from the rotatable shafts 101 A' / 101 B 'and / or by advancing or approaching the shock absorbers 2 A / 2 B in the direction of the rotatable shafts 101 A' / 101 B '. This means that the assembly worker does not change the temples 105 A / 105 A '/ 105 B' to other positions. The adjustable 2 A / 2 B shock absorbers make assembly work easier.

FIGS. 5 and 6 show the right part of the hammer stopper 100 E 100 A ', which according to the present invention in silent piano is incorporated. As described hereinbefore, the right part 100 comprises the rotary shaft 101 E A 'and the adjustable shock absorber 2 A. The adjustable shock absorber 2A includes a damping or cushion or buffer member 4 and a position adjusting device A 10 A on. The attenuator 4 A is attached to the position adjuster 10 A, and the position adjuster 10 A is movably connected to the associated rotary shaft 101 A. The adjustable shock absorber 2 B of the left part 2 F also has a damping or cushion or buffer member 4 B and a position adjusting device 10 B. The attenuator 4 B is fixed to the position adjusting device 10 B, and the position adjusting device 10 B is movably connected to the associated rotary shaft 101 B. In the adjustment work, the worker changes the position adjusters 10 A / 10 B to other positions to find the appropriate relative positions. The position adjusting device 10 B is structurally similar to the position adjusting device 10 A, so that only the position adjusting device 10 A is described below in order to avoid repetition.

The position adjusting device 10 A essentially comprises the following: a bracket 2 Aa with an L-shaped cross section, screws 21 , nuts 22 , positioning screws 3 , locking screws 5 and spring washers 30 . The bracket 2 Aa has a vertical surface 2 Ab and a horizontal surface 2 Ac, and the vertical surface 2 Ab and the horizontal surface 2 Ac essentially cross at right angles. The vertical surface 2 Ab has a major surface that is substantially vertical to the horizontal plane defined by a plurality of strings 206 when the player pulls the button 113 to change the silent piano to the silent mode. The horizontal surface 2 Ac has a major surface that is substantially parallel to the horizontal plane defined by a plurality of strings 206 when the player pulls the button 113 to set the silent piano in the silent mode. The vertical surface 2 from the bracket 2 Aa is fixed to the rotary shaft 101 A by the screws 21 in a plurality of positions along the lateral direction. The contact area of the rotary shaft 101 A 'is partially removed to create a flat surface. The flat surface allows the rotary shaft 101 A 'to be kept in stable contact with the vertical surface 2 Ab of the bracket 2 Aa.

The rotary shaft 101 A 'is provided at intervals with threaded holes 1 a, and elongated holes 20 are formed at intervals in the vertical part 2 Aa. The intervals between the threaded holes 1 a are the same size as the intervals between the elongated holes 20 . The screws 21 are screwed into the threaded holes 1 a through the elongated holes 20 . The opening 20 in the bracket 2 (actually: "2Aa") is elongated in the vertical direction when it is set in the locking position, and the width in the lateral direction when it is set in the locking position is wider than the thread of the screw 21 , but closer than the head of the screw 21 . The opening 20 is dimensioned such that the bracket 2 (actually: " 2 Aa") in the drawing can be easily moved up or down when the screws 21 are loosened.

The attenuator 4 A is attached to the lower surface of the horizontal surface 2 Ac of the bracket 2 Aa. The attenuator 4 A is made of foamed urethane or rubber. A felt layer can be attached to the surface of the attenuator 4 A.

The positioning screws 3 are inserted through holes 1 b of the rotary shaft 101 A '. The positioning screws 3 are slidably inserted through the holes 1 b and penetrate the rotary shaft 101 A (actually: " 101 A '). The exposed parts of the positioning screws 3 of the rotary shaft 101 A (actually:" 101 A') are fixed by means of spring washers 30 , The positioning screws 3 are thus fixed on the rotary shaft 101 A (actually: " 101 A ').

The spring washer 30 may be a circular, toothed, clamped, or locked washer that has four teeth, as shown in FIG. 7A. The four teeth are arranged at 90 ° intervals and extend inwards from the ring. The teeth engage in the threads of the positioning screw 3 . The spring washer 30 may also have a C-shaped shape and be formed with a tooth which engages in the threads of the positioning screws 3 , as shown in FIG. 7B. When the spring washer 30 shown in FIG. 7B is used, a flat groove is formed on the surface of the positioning screw 3 , which cooperates with the spring washer 30 . The spring washers 30 act as stoppers or as fixing elements.

Each positioning screw 3 is screwed into the nut 22 . The nuts 22 are welded to the upper surface of the horizontal surface 2 Ac of the bracket 2 (actually: " 2 Aa"). Through holes 2 Ad are provided on the horizontal surface 2 B in order to make room for the front part of the positioning screws to be inserted.

A metal piece 31 with an approximately C-shaped cross section can be used instead of the spring washer 30 , as shown in Fig. 8A. One end of the metal piece 31 lies on the upper part of the circumference of the through hole 1 b. The other end of the metal piece 31 is bifurcated to create a tooth and is held in contact with the bracket 2 (actually: " 2 Aa") as shown in Fig. 8A. The distance between the tooth of the metal piece 31 is slightly smaller than the diameter of the positioning screw 3 . A flat groove is formed in the contact part of the positioning screw 3 . The tooth of the metal piece 31 is in engagement with the flat groove in the positioning screw 3 . When the metal piece 31 is engaged with the flat groove in the positioning screw 3 , the metal piece 31 surrounds the rotating shaft 101 A 'on at least half of the circular surface of the rotating shaft 101 A'. The radius of curvature is a little smaller than the radius of the rotary shaft 101 A ', so that the metal piece 31 is held elastically on the circular surface of the rotary shaft 101 A'. When the positioning screw 3 is screwed into the through hole 1 b, the tooth of the metal piece 31 engages in the positioning screw 3 .

The set screws 5 are also screwed into the holes 1 c, which are formed in the rotary shaft 101 A (actually: " 101 A"). The hole 1 c is internally threaded, and the set screw 5 is engaged with the internally threaded hole 1 c. The tip of the set screws or locking screws 5 engages in the thread root of the positioning screw 3, to secure the positioning screw. 3

When the right part 100 is installed E of the hammer stopper 100 in a piano case, the assembly worker operates the hammer stopper 100 A ', as follows. The assembly worker assembles the rotary shaft 101 A 'and the position adjusting device 10 A. First, the bracket 2 Aa is arranged on the rotary shaft 101 A '. The flat surface of the rotary shaft 101 A ″ is held in contact with the rear of the vertical surface 2 Aa (actually: “ 2 Ab”) of the bracket 2 A (actually: “ 2 Aa”) in order to cover the openings 20 with the holes 1 a aligned. The screws 21 are screwed into the holes 20 and holes 1 a to fix the bracket 2 Aa. The positioning screws 3 are then screwed into the through holes 1 b. The spring washer 30 interacts with the front end of the positioning screw 3 facing the space under the rotary shaft 101 A '. The positioning screw 3 is tightened when the front end of the positioning screw 3 reaches the nut 22 . The front end of the positioning screw 3 is screwed into the nut 22 . Then the spring washer 30 is further attached until the spring washer 30 is held in contact with the lower surface of the rotary shaft 101 A '. Finally, the locking screws 5 are screwed into the holes 1 c in order to fix or secure the positioning screw 3 .

Next, the assembly worker installs the assembled right part 100 E of the hammer stopper 100 A 'in the piano casing PC. The assembly worker namely fixes the bracket 105 B 'and the bracket 105 A to the projection 107 and to the inner rectilinear surface of the side board 104 . The bracket 105 B 'is brought into contact with both sides of the protrusion 107 of the iron plate in the piano housing and fastened to the protrusion 107 by means of the screws 105 Ba. The rotary shaft 101 A 'of the hammer stopper 100 A is arranged on the bracket 105 A / 105 B', and the bearings 106 A 'and 106 B' are fastened by means of screws. Finally, the front end of wire 112 A is inserted into the slot of fin 114 'and attached to fin 114 '. The left part 100 F is installed similarly to the right part 100 E, and the description is omitted to avoid repetition.

After installing the 100 A 'hammer stopper in the piano case, the 100 A' hammer stopper is set to the appropriate relative position to the hammers 234 and strings as follows. First, the assembly worker pulls the button 113 A to drive the hammer stopper 100 A 'or to set it in motion. The hammer stopper 100 A 'rotates and the attenuators 4 A / 4 B face the hammers 234 . The silent piano then enters silent mode. In order to set the relative position of the hammer stoppers 100 A ', the monthly worker actuates the position adjusting device 10 A / 10 B. The monthly worker loosens or loosens the set screws 5 and the screws 21 in order to allow the bracket 2 Aa together with the damping member 4 , to move vertically. At this stage, the rotary shaft 101 A 'is rotatably supported by the bracket 105 A / 105 B by means of the bearings 105 A / 105 B. The spring washer 30 is held in contact with the lower surface of the rotating shaft 101 A '.

As shown in Fig. 9, when the assembly operator rotates the positioning screw 3 with a suitable tool TL in the clockwise direction, the front part of the positioning screw 3 is downwardly screwed into the nut 22. As the pen writing the screws do not allow 30 3, relative to the rotational shaft 101. A 'to move the bail scroll 2 Aa along with the damping member 4 relative to the rotation shaft 101. A' upwards, and that upon rotation of the positioning screws. 3 On the other hand, when the assembler rotates the positioning screw 3 counterclockwise, the front ends of the positioning screws 3 are moved upward away from the nut 22 . For the same reason as above, the bracket 2 Aa and the damping member 4 together move downward relative to the rotary shaft 101 A ', specifically when the positioning screws 3 are rotated. The assembly worker strikes the black / white keys 232 a / 232 b to check whether the hammer handles 234 c have been brought into contact with the damping member 4 of the hammer stopper 100 A 'without a strange keystroke. After the height of the attenuator 4 is determined, the screws 21 are tightened, and the set screws 5 are screwed into the holes 1 c in order to secure the positioning screw 3 on the rotary shaft 101 A '.

As is clear from the foregoing, the assembler adjusts the hammer stopper 100 A 'to the appropriate relative position to the hammers 234 and strings without having to disassemble the bearings 105 A / 105 B. The bracket 105 A does not need to be adjusted so that the dismantling work of the keyboard or the key mechanisms is avoided and the time required for the height adjustment is considerably reduced. Further, since the positioning of screws 3 are determined by the set screws 5 and attached, the height of the bracket 2 is hardly changed even when the attenuator 4 c through the hammer shanks 234 repeatedly struck. Furthermore, if the positioning screws 3 , the screws 21 and the set screws 5 can be arranged around a frame (a rib) of a piano frame instead of an area where the strings 206 are stretched, in this case the assembler is allowed to adjust the height of the attenuator 4 much easier to adjust because the adjustment work is not disturbed by the sets of strings 206 .

Second embodiment

Fig. 10 shows a hammer stopper 300 according to the second embodiment of the present invention.

The hammer stopper 300 essentially comprises an attenuator 310 , a rotary shaft 320 and a position adjusting device 312 . The position adjuster 312 includes a bar 314 , a positioning screw 322 , a set screw 326 , a spring washer 330 and a coil spring 332 . Attenuator 310 is attached to rod 314 , which has a rectangular cross-section. An internally threaded hole 316 is formed in rod 314 . The rotary shaft 320 is provided with a through hole 324 , which has an internal thread. The positioning screw 322 is screwed into the through hole 324 , and the spring washer 330 interacts with the positioning screw 3 (actually: " 322 "), which is exposed on the rotary shaft 320 , in order to fix the positioning screw 322 . The front end of the positioning screw 322 is screwed into the internally threaded hole 316 in the rod 314 . The coil spring 332 is interposed between the spring washer 330 and the rod 314 to apply a compressive force to the spring washer 330 and exert the rod 314th A locking screw (actually: "set screw") 326 is screwed into a hole 328 in order to fix or fix the positioning screw 322 .

An assembler assembles the attenuator 310 and the rotary shaft 320 as follows. An assembler inserts the positioning screw 322 into the through hole 324 . The spring washer 330 interacts with the positioning screw 322 , which projects freely from the rotary shaft 320 . The front end of the positioning screw 322 is inserted into the coil spring 332 . The assembler inserts the front end of the positioning screw 322 into the internally threaded hole 316 . The assembly worker arranges the hammer stop 300 on the bracket 105 A / 195 B and fixes the hammer stop 300 on the bearings 106 A / 106 B.

After installing the hammer stopper 300 in the piano housing, the height of the damping element 310 is adjusted by simply turning the positioning screw 322 of the position adjusting device 312 . The assembler pulls the button 113 to move the hammer stopper 300 to the locked position, and the position of the damper 310 is properly adjusted. Namely, when the positioning screw 322 is rotated in the clockwise direction, the front end of the positioning screw 322 is screwed relative to the rotation shaft 320 in conjunction with the rotation of the positioning screw 322 downward. Since the positioning screw 322 is fixed to the rotary shaft 320 with the spring washer 330 , the damping member 310 moves upward. When the positioning screw 322 is rotated counterclockwise opposite direction, the front end of the positioning screw 322 is screwed upwards out of the hole 316 out, then the attenuator 310 that relative to the rotational shaft 320 to move downward. Thus, the height of the hammer stopper 300 is easily adjusted. After adjustment of the height of the attenuator 310, the set screw is screwed into the hole 328 326, to fix the positioning screw 322, and prevents the set screw 326, the positioning screw that loosens 322nd

From the above description, it is clear that the worker assembles the hammer stopper 300 and adjusts its height to its blocking position. There is no need to pull the keyboard and key mechanics out of the piano case to adjust the height of the hammer stop 300 . The height adjustment work is less time consuming.

Third embodiment

Fig. 11 shows a hammer stopper 400 according to a third embodiment of the present invention. The hammer stopper 400 essentially comprises an attenuator 410 , a rotary shaft 420 and a position adjustment device 412 . The position adjuster 412 consists of a rod 414, a rod 414 is screwed into the positioning screw 430 and a pair of set screws 432/434, which is held in contact with the upper surface of the rod 414th The attenuator 410 is attached to the rod 414 , which has a rectangular cross section. Fig. 12 shows a sectional view of the hammer stopper 400 along the line AA 'in Fig. 11. Fig. 13 shows a sectional view of the hammer stopper 400 along the cutting line BB' in Fig. 11. As shown in FIGS. 12 and 13, is in the rod 414 is formed with an internally threaded hole 416 . The rotary shaft 420 includes end parts 420 A, each of which has a circular cross section, and a body part 420 B, which has a rectangular cross section. The circular cross section of the end portion 420 A allows the rotary shaft 420 to rotate smoothly in response to the work of the transmission mechanism 110 . The right-angled cross-section of the body part 420 B allows the assembly worker to fix the rotating shaft easily or simply to the rod. Pairs of through holes 422/424/426 formed in this internal threads are provided in the rotary shaft 420th The positioning screw 430 is screwed into the through holes 422 in the rotary shaft 420 and further screwed into the holes 416 to connect the rotary shaft 420 A with the rod 414 . A pair of set screws or locking screws 424/426 (actually, "432/434") is screwed into the holes 424/426. The front ends of the pair of set screws 424/426 (actually, "432/434") which protrude from the lower surface of the rotary shaft 420 freely to be held in contact with the flat surface of the rod 414th

The assembler assembles the attenuator 410 and the rotary shaft 420 as follows. The assembler inserts the positioning screw 430 into the through holes 422 and also inserts the positioning screw 430 into the threaded holes 416 . This work is done for all screws 430 . The assembly worker inserts the screws 432/434 into the holes 424/426 and stops the introduction of set screws 432/434 before the tips of the set screws 424/426 (actually: "432/434") reach the flat surface of the rod 414th Next, the assembly worker arranges the hammer stopper 400 on the bracket 105 A / 105 B and fixes the hammer stopper 400 with the bearings 106 A / 106 B on the bracket 105 A / 105 B.

After installation of the hammer stopper 400 in the piano case the level of the attenuator 410 by simply turning the positioning screw 430, the position adjuster 420 (actually: "412") is set. The assembler pulls the button 113 to move the hammer stopper 400 to the locked position and the height of the attenuator 410 is properly adjusted. Namely, when the screw 430 is rotated clockwise, the front end of the screw 430 is screwed down relative to the rotating shaft 430 (actually: " 420 ") so that the damper 410 moves upward. On the other hand, the positioning screw is rotated in the counterclockwise direction 430, the front end of the screw 430 is screwed relative to the rotary shaft 420 upward so that the attenuator 410 moves downward. Thus, the height of the hammer stopper 400 is easily adjusted. After adjustment of the height of the attenuator 410, the set screws 424/426 are (actually, "432/434") further screwed until the tips of the set screws 424/426 (actually, "432/434") with the flat surface of the rod 414 in Is kept in contact. This prevents the screw 430 from loosening.

From the above description, it is clear that the worker assembles the hammer stopper 400 and adjusts its height to its blocking position. There is no need to pull the keyboard and key mechanics out of the piano housing to adjust the height of the hammer stop 400 . The height adjustment work is less time consuming.

Fourth embodiment

Fig. 14 shows a hammer stopper 500 according to a fourth embodiment of the present invention. The hammer stopper 500 essentially comprises an attenuator 510 , a rotary shaft 512 and a position adjusting device 520 . The attenuator 510 is attached to the rotary shaft 512 . The position adjusting device 520 carries the rotary shaft 512 and is fixed on the side board 104 of the piano housing. The position adjuster 520 also includes a stationary bracket 530 , a movable bracket 540, and a positioning screw 550 . The stationary bracket 530 has a horizontal part 532 and a vertical part 534 . A hole 536 with an internal thread is formed in the horizontal part 532 of the stationary bracket 530 . Furthermore, two through holes 538 a / 538 b are formed in the vertical part 534 of the stationary bracket 530 . The movable bracket 540 also has a horizontal part 542 and a vertical part 544 . A through hole 546 is formed in the horizontal part 542 of the movable bracket 540 . Furthermore, two through holes 548 a / 548 b are formed in the vertical part 544 of the movable bracket 540 . The stationary bracket 530 and the movable bracket 540 are layered or placed one above the other in such a way that the through holes 538 a / 538 b are aligned with the through holes 548 a / 548 b, respectively. A pair of screws 552 is slidably inserted into the through holes 538 a / 548 a and into the through holes 538 b / 548 b, respectively. The pair of screws 552 is screwed into the side board 104 and the stationary bracket 530 and the movable bracket 540 are fastened. The diameter of the through holes 538 a / 538 b is approximately the same as that of the screws 552 . Since the screws 552 are screwed into the side board 104 , the stationary bracket 530 is stationary with respect to the side board 104 . On the other hand, the diameter of the through holes 548 a / 548 b are relatively larger than the diameter of the screws 552 . When the screws 552 are loosely screwed into the side board 104 , the movable bracket 540 is allowed to move with respect to the side board 104 . The positioning screw 550 is slidably inserted into the through hole 546 in the movable bracket 540 and screwed into the hole 536 in the stationary bracket 530 . The positioning screw 550 is fixed to the movable bracket 540 with a spring washer 560 . The rotating shaft 512 of the hammer stopper 500 is fixed to the upper surface of the horizontal part 542 of the movable bracket 540 by a bearing 514 . A set screw 516 is screwed through the bearing 514 to secure the rotary shaft 512 . In the above description, the threads are formed in hole 536 . However, the threads can be formed in hole 546 instead of hole 536 . In this case, the spring washer 560 cooperates with the stationary bracket 530 .

An assembler assembles the hammer stopper 500 and position adjuster 520 as follows. The assembly worker inserts the positioning screw 550 into the through hole 546 of the movable bracket 540 and fixes the positioning screw 550 on the movable bracket 540 with the spring washer 560 . The positioning screw 550 is then screwed into the internally threaded hole 536 .

The assembler places the rotary shaft 512 of the hammer stopper 500 on the upper surface of the horizontal part 542 of the movable bracket 540 . The rotary shaft 512 is fastened to the movable bracket 540 with the bearing 514 and is fixed or fastened to the bearing 514 with the set screw 516 . The assembled or assembled stationary bracket 530 and the movable bracket 540 are pressed against the side board 104 . In this state, the through holes 538 a / 538 b and the through holes 548 a / 548 b are in alignment therewith. The through holes 538 a / 538 b / 548 a / 548 b are also aligned with the threaded holes in the side board 104 . As a result, screws 552 are threaded into the threaded holes in side board 104 . In this state, the screws 552 are loosely screwed into the holes so that the movable bracket 540 is allowed to move up or down relative to the side board 104 .

After installing the hammer stopper 500 in the piano housing, the height of the hammer stopper 500 is set by simply turning the positioning screw 550 of the position adjusting device 520 . The assembler pulls the button 113 to move the hammer stopper 500 to the locked position and the height of the hammer stopper 500 is properly adjusted. Namely, when the positioning screw 550 is turned clockwise, the front end of the positioning screw 550 is screwed down to cause the movable bracket 540 to move relative to the side board 104 down. Since the movable bracket 540 is allowed to move up or down with respect to the side board 104 , the hammer stopper 500 moves down to reduce the distance between the damper 510 and the hammer handle 534 c. When the positioning screw is rotated in the clockwise direction 550, the front end of the positioning screw is threaded 550 upwardly, to cause the movable bracket 540 to to move relative to the side board 104 upwardly so that the hammer stopper 500 after moving up to the Increase distance between the attenuator 510 and the hammer handle 534 c. Thus, the height of the hammer stopper 500 is easily adjusted. After adjusting the height of the hammer stopper 500 , the screws 552 are firmly screwed into the holes in the side board 104 , so that the stationary bracket 530 and the movable bracket 540 are firmly attached.

From the above description, it is clear that the worker assembles the hammer stopper 500 and easily adjusts its height to its blocking position. There is no need to pull the keyboard and key mechanisms out of the piano case to adjust the height of the hammer stop 500 . The height adjustment work is less time consuming.

modifications (1) First modification

In the first to third exemplary embodiments, positioning screws 3 , 322 and 430 are used to adjust the height of the damping members 4 , 310 or 410 . However, instead of using the positioning screws 3 , 322 , 430 , a positioning pin can be used. The positioning pin has a plurality of grooves formed thereon. A through hole is formed in the rotating shaft 101 A, 320 , 420 , and the positioning pin is inserted into the through hole. A vertical through hole is also formed in the bracket 2 or in the rods 314 , 414 instead of the nut 22 or the threaded holes 316 , 416 . There is also a horizontal hole in bracket 2 that intersects the vertical hole or rods 314 , 414 . A stop or holding pin is inserted into the horizontal through hole and interacts with one of the grooves in such a way that the positioning pin is fixed or fastened to the bracket 2 or 314 , 414 . A coil spring is fixed to the bracket 2 or 314/414 or attached, and the stop pin is inserted into the coil spring. The pressing force is exerted against the positioning pin, so that the positioning pin is securely fixed.

An assembler assembles the hammer stopper by inserting the positioning pin into the through hole of the bracket 2 or 314 , 414 and fixes the positioning pin with the stop pin such that the stop pin interacts with the groove of the positioning pin. When the height of the hammer stopper is set, the stop pin is removed, the positioning pin is moved, and a different groove is aligned with the through hole. The stop pin is reinserted into the through hole to interact with the different groove. Thus, the height of the hammer stopper of the first modification is easily adjusted.

(2) Second modification

In the fourth embodiment, the positioning screw 550 is used to adjust the height of the attenuator 510 . However, instead of using the positioning screw 550 , a positioning pin having a plurality of grooves formed thereon can be used. The threads in hole 510 are removed to allow positioning pin 550 to slide smoothly. A horizontal through hole is additionally formed in the stationary bracket 530 to cut the hole 536 . A stop pin is inserted into the horizontal through hole and cooperates with one of the grooves of the positioning pin, so that the positioning pin is fixed.

When the assembler adjusts the height of the hammer stopper, the stop pin is removed, and the positioning pin is moved to change the position of the movable bracket 540 , and a different groove is aligned with the through hole. The stop pin is reinserted into the through hole to interact with the different groove. Thus, the height of the hammer stopper of the first modification is easily adjusted.

From the above description, it is clear that the worker assembles the hammer stopper 500 and easily adjusts its height to its blocking position. There is no need to pull the keyboard and key mechanisms out of the piano case to adjust the height of the hammer stop 500 . The height adjustment work is less time consuming.

(3) Third modification

Although the above descriptions refer to the wing made, the present invention can also be applied to one standing piano can be implemented. If the hammer stopper according to the present invention applied to an upright piano the attenuator and hammer stopper can be used with one The upright piano handle when the Hammer stopper is arranged or set in the blocking position. Furthermore, the damping member of the hammer stopper with a counter catcher or captivity of upright pianos if instead of the hammer handle the hammer stopper in the Blocking position is arranged or set.

Although particular exemplary embodiments have been shown and described, it is clear to a person skilled in the art that various changes and Modifications can be made without the spirit and scope of the to leave the present invention.

A composite or mixed-key musical instrument according to the present invention can have an acoustic piano 1 , a silent system 200 and an automatic playing system. The automatic game system includes a control device and solenoid actuated actuators, and the solenoid actuated actuators are provided between the key bed and the black / white keys. The controller analyzes the music data codes and determines the black / white buttons to be depressed and released. The controller then provides drive signals to the solenoid operated key actuators associated with the black / white keys to be depressed and removes or terminates the drive signals from the solenoid operated key actuators associated with the black / white keys to be released , When the key actuators actuated by electromagnets are energized, the plungers extend and begin key movement without the finger movement of a human player. On the other hand, when the drive signals are removed from the key actuators operated by electromagnets, the plungers are withdrawn and the black / white keys return to their rest position. The composite or mixed-key musical instrument is referred to as an automatic player piano, and the adjustable shock absorbers make assembly work in the automatic player piano easy and simple.

The hammer stopper 20547 can be divided into more than just two parts. In in this case, more than two position adjusters independently the associated attenuators from each other to the appropriate or regulatory relative positions.

Claims (7)

1. A hammer stopper for use in a piano comprising hammers and strings to be struck by the associated hammers, the hammer stopper comprising:
a shaft ( 101 A '/ 101 B', 320 , 420 , 420 A, 420 B, 512 ) which is rotatable between a free position which allows the hammers ( 234 ) to strike the strings ( 206 ) and one Blocking position for blocking or protecting the strings ( 206 ) from a stop of the associated hammers ( 234 ); and
a shock absorber, which remains (2 A / 2 B, 310/312 410/420, 510/520) having a surface in the free position at certain positions outside the trajectories of the hammers, and in the blocking position, the hammers ( 234 ) bouncing off the surface without striking the strings,
characterized by
that the shock absorber (2 A / 2 B, 310/312, 410/420, 510/520) further comprises a position adjustment device (10 A / 10 B, 312, 412, 520) which with the shaft (101 A '/ 101 B ', 320 , 420 , 420 A, 420 B, 512 ) is movably connected to adjust the surface to a relative position of the hammers and the strings. 2. Hammer stopper according to claim 1, wherein the rotary shaft in several parts is divided, and wherein the shock absorber part surfaces, which in Combination form the surface, and a variety of Position part adjustment devices for independent adjustment of the part surfaces to the relative position. 3. Hammer stopper according to claim 2, further comprising a transmission system which is connected in parallel with the plurality of parts to simultaneously the variety of parts between the free position and the Change blocking position. 4. Composite keyboard musical instrument, the following being provided:
a keyboard ( 232 ) with a plurality of keys ( 232 a / 232 b) which are moved between respective rest positions and respective end positions;
a plurality of key mechanisms ( 202 ), each connected to the plurality of keys ( 232 a / 232 b) and selectively actuated by the keys moved toward their end positions;
a plurality of strings ( 206 ), each associated with the plurality of keys ( 232 a / 232 b) for generating tones by vibrations;
a plurality of hammers ( 234 ) each associated with the plurality of strings ( 206 ) selectively driven to rotate by the plurality of selectively actuated key mechanisms ( 202 ) and which at the end of rotation rotate the associated strings to produce Striking tones; and
a hammer stopper ( 100 A ', 300 , 400 , 500 ) which is provided for the hammers ( 234 ) and which has the following:
a shaft ( 101 A '/ 101 B', 320 , 420 , 512 ) that can be adjusted between a free position in which the plurality of hammers are allowed to strike the associated strings and a blocking position to bounce the hammers let before striking the associated strings; and
a shock absorber (2 A / 2 B, 310/312 410/420, 510/520), which is connected to the shaft and having a surface, in the blocking position, the plurality of hammers bounces on the,
characterized,
that the shock absorber (2 A / 2 B, 310/312, 410/420, 510/520) further comprises a position adjustment device (10 A / 10 B, 312, 412, 520) which with the shaft (101 A '/ 101 B ', 320 , 420 , 420 A, 420 B, 512 ) is movably connected, specifically to adjust the surface to a position relative to the hammers and the strings. 5. A composite keyboard musical instrument according to claim 4, wherein the Shaft is divided into a variety of parts, and being the shock absorber Part surfaces, which in combination form the surface, and a Variety of position part adjustment devices for independent adjustment which includes part surfaces on the relative position. 6. The composite keyboard musical instrument according to claim 5, further comprising has a transmission system that is in parallel with the plurality of parts is connected to simultaneously the multitude of parts between the free Position and the blocking position. The composite key musical instrument of claim 4, further comprising an electronic tone generation system ( 220 ) that monitors the keyboard to determine which keys are depressed and released to produce electronic tones corresponding to the tones generated by the strings.