WO2005119644A1 - 鍵盤楽器のストッパ - Google Patents
鍵盤楽器のストッパ Download PDFInfo
- Publication number
- WO2005119644A1 WO2005119644A1 PCT/JP2005/009440 JP2005009440W WO2005119644A1 WO 2005119644 A1 WO2005119644 A1 WO 2005119644A1 JP 2005009440 W JP2005009440 W JP 2005009440W WO 2005119644 A1 WO2005119644 A1 WO 2005119644A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cushion
- hammer
- stopper
- key
- mass body
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/32—Constructional details
- G10H1/34—Switch arrangements, e.g. keyboards or mechanical switches specially adapted for electrophonic musical instruments
- G10H1/344—Structural association with individual keys
- G10H1/346—Keys with an arrangement for simulating the feeling of a piano key, e.g. using counterweights, springs, cams
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
- G10C3/00—Details or accessories
- G10C3/12—Keyboards; Keys
Definitions
- the present invention relates to a stop for a keyboard instrument that restricts rotation of a rotating body such as a hammer or a key that rotates in response to key depression.
- a stopper disclosed in Patent Document 1 has been known as a stopper for this type of keyboard instrument.
- the stove is used for an upright piano having a sound deadening function, is disposed between a string and a hammer, and is attached to a rotating shaft extending in a key arrangement direction along the key.
- This rotating shaft is attached to a piano case.
- the stopper is composed of a hard cushion, a soft cushion, and a very soft cushion, which are laminated on each other, and is arranged in this order from the rotating shaft side.
- the hammer is configured to rotate toward a string via a pen or jack that rotates with key depression.
- the conventional stopper is composed of three cushions, extremely soft, soft and hard! Therefore, when a large impact force is applied by the contact of the hammer, the hammer is not moved.
- the plurality of cushions, including the extremely soft cushions, are considerably displaced until they come into contact with the stove and stop. Also, when the hammer comes into contact with the cushion, the jack has not yet come off, so the compressed feeling of the cushion is transmitted as if the sponge were pressed to the player's fingertips. The feeling cannot be obtained, and the feeling of touch is impaired.
- the cushion of the stove is hardened, May be reduced. However, in this case, a loud collision sound is generated when the hammer comes into contact with the hard sash. Further, since vibrations caused by the collision are transmitted to the case via the hard cushion and the rotating shaft, noise may be generated.
- the present invention has been made to solve the above-mentioned problems, and by obtaining a good stopping feeling of the rotating body, it is possible to improve the touch feeling and to reduce collision noise and noise.
- An object of the present invention is to provide a keyboard instrument that can be suppressed.
- Patent Document 1 JP-A-6-180583
- the invention according to claim 1 is a stop for a keyboard instrument that restricts rotation of a rotating body by contacting a rotating body that rotates with key depression.
- the stopper of this keyboard instrument is composed of first and second cushions laminated together and a mass body sandwiched between them.
- the mass body refers to an object having a relatively high rigidity and a high specific gravity.
- the mass body hardly bends, even when the second cushion is soft, the displacement (bite) on the back side of the first cushion is prevented by the mass body. As a result, the displacement of the first cushion is also reduced.
- the amount of displacement of the first and second cushions when the rotating body abuts is reduced, so that the amount of displacement of the overall stopper can be reduced as compared with the related art. Therefore, a good stopping feeling of the rotating body can be obtained, thereby improving the touch feeling.
- the mass body has a characteristic that it hardly vibrates due to its large specific gravity and large weight. This makes it difficult for the vibration accompanying the collision of the rotating body to be transmitted to the second cushion. Become. Also, the vibration transmitted to the second cushion is absorbed by the second cushion. As described above, transmission of vibration to the keyboard instrument case via the second cushion can be suppressed, and thus noise can be suppressed.
- the invention according to claim 2 is the stove of the keyboard instrument according to claim 1, wherein the mass body is made of metal.
- the mass body is made of metal, it is possible to easily obtain a mass body with high rigidity and high specific gravity. In addition, by selecting an inexpensive metal, the material cost of the mass body can be reduced.
- the invention according to claim 3 is the stopper of the keyboard instrument according to claim 1 or 2, wherein the first and second cushions have different hardnesses.
- desired cushion characteristics can be obtained by appropriately selecting the hardness of the first and second cushions.
- the invention according to claim 4 is the stoma of the keyboard instrument according to claim 3, wherein the first cushion is harder than the second cushion.
- the displacement of the first cushion is reduced, so that a spring feeling is generated. It is possible to secure a good sense of stopping of the rotating body without causing the rotating body to stop. As a result, a firm and good touch can be obtained.
- the vibration caused by the collision is sufficiently absorbed by the softer second cushion, the transmission of the vibration to the case via the second cushion can be sufficiently suppressed, and the noise can be sufficiently suppressed. it can. Further, as described above, even if the second cushion is soft, the deflection of the first cushion is suppressed by the mass body provided between the two cushions. Is not hindered, and a good touch feeling can be secured.
- the invention according to claim 5 is the stopper for a keyboard instrument according to any one of claims 1 to 4, further comprising a felt attached to a surface on the first cushion side. .
- the first and second cushions and the mass body extend in the direction in which the rotating bodies are arranged. It is characterized by.
- FIG. 1 is a side sectional view showing a keyboard device provided with a stove of the present invention in a key released state.
- FIG. 2 is a partially enlarged side sectional view showing the vicinity of a hammer stud.
- FIG. 3 is a partial sectional side view showing a rear end portion of the keyboard device of FIG. 1 in a key pressed state.
- FIG. 4 is a partial side sectional view showing a front end portion of the keyboard device of FIG. 1 in a key pressed state.
- FIG. 5 is a partial side sectional view showing a modified example of the hammer stud of FIG. 2.
- FIG. 1 shows the keyboard device of the electronic piano in a key released state.
- the keyboard device 1 includes a keyboard chassis 3 provided on a horizontal shelf board 2, a plurality of keys 4 (rotating bodies) supported swingably on the keyboard chassis 3, and a rear side of the keyboard chassis 3 (rotating body). (The right side of the figure)
- the keyboard chassis 3 is formed by assembling an iron plate or the like punched and bent by a press, and is fixed on the shelf plate 2. At the center of the keyboard chassis 3 in the front-rear direction, a plurality of no-run pins 9 are arranged upright so as to be arranged in the left-right direction (the depth direction in FIG. 1).
- the plurality of keys 4 includes a plurality of white keys 4a and a black key (not shown), each of which is It is composed of a key body 11 extending in the front-rear direction and a key cover 12 attached to the surface of the front half. At the center of the key body 11 in the front-rear direction, a balance pin hole 13 penetrating vertically is formed. The key 4 is swingably supported by the normal pin 9 via the balance pin hole 13. The upper part of the rear end of the key body 11 is notched, and a sheet-like felt 14 is attached to the bottom surface of the notch.
- the action chassis 5 is disposed immediately behind the keyboard chassis 3, extends in the left-right direction so as to extend over all the keys 4, and is fixed on the shelf 2.
- the action chassis 5 is formed by extruding a metal material such as aluminum into a hollow shape.
- the action chassis 5 integrally includes a hammer support portion 15 for supporting the hammer 6 and a stopper mounting portion 16 to which the hammer stopper 7 is mounted. In preparation for.
- the hammer support 15 has a rectangular cross section that is long in the up-down direction, and an arc-shaped hammer fulcrum 17 that projects obliquely upward and forward is formed at the upper front end.
- a stair-shaped key placement portion 18 is provided at the center of the hammer support portion 15 in the vertical direction so as to protrude forward.
- the front end of the key placing portion 18 is screwed to the keyboard chassis 3, and a rear key stopper 19 is attached to the upper surface of the central portion.
- the key rear stopper 19 is formed of a single band-shaped felt, and extends continuously in all the keys 4 in the left-right direction.
- the hammer 6 is provided for each key 4, and includes a rod-shaped hammer body 6a made of synthetic resin, a weight 6b and an adjusting screw 6c attached thereto.
- An arcuate engagement groove 6d is formed at the rear end of the hammer main body 6a.
- the hammer 6 engages the hammer support portion of the action chassis 5 with the engagement groove 6d engaged with the hammer fulcrum 17. It is rotatably supported at 15.
- the weights 6b are made of an iron plate or the like, and are attached to the front ends of both the left and right sides of the hammer body 6a (only one is shown).
- the adjustment screw 6c is for adjusting the relative angle of the hammer 6 with respect to the key 4, and is screwed into the lower surface of the hammer body 6a so as to be able to advance and retreat.
- the hammer 6 is in contact with the rear end of the corresponding key 4 from above through the adjusting screw 6c and the felt 14.
- a switch pressing portion 21 is provided on the upper surface of the hammer main body 6a at a position immediately in front of the engaging groove 6d so as to protrude.
- the stopper mounting portion 16 of the action chassis 5 extends obliquely upward and forward from the upper end of the hammer support portion 15 via the back wall 22. As shown in FIG. 2, a shallow concave portion 23 is formed at the front end of the lower surface of the stopper mounting portion 16, and the hammer stopper 7 is mounted in the concave portion 23.
- the hammer stopper 7 includes a felt 24, a first cushion 25, a mass body 26, and a second cushion 27.
- Each of these components 24 to 27 is composed of a single strip extending continuously across all keys 4 in the direction in which the keys 4 are arranged, and is laminated in the order described above and adhered to each other. Have been.
- the hammer stopper 7 is attached to the stopper attachment portion 16 by bonding the second cushion 27 in a state where the second cushion 27 is partially fitted into the recess 23 of the stopper attachment portion 16.
- the mass body 26 is made of a metal plate having a relatively high rigidity and a large specific gravity, for example, an iron plate.
- Each of the first cushion 25 and the second cushion 27 is made of urethane foam.
- the first cushion 25 has a lower foaming degree and is harder than the second cushion 27.
- the front key stopper 8 is a single strip having exactly the same configuration as the above-mentioned non-marshal stopper 7. As shown in FIG. 4, the front key stopper 8 is bonded to the front end of the upper surface of the keyboard chassis 3 with the felt 24 facing upward, and extends across all the keys 4 in the direction in which the keys 4 are arranged. In the key release state, the front end of the key 4 faces the felt 24.
- a key switch 31 is provided on the stopper mounting portion 16 of the action chassis 5.
- the key switch 31 is for detecting key press information of the corresponding key 4 via the hammer 6 and includes a switch board 32 and a switch body 33 provided for each key 4 on the switch board 32. Have been.
- An engagement recess 34 is formed at the base end of the stopper mounting portion 16, and the key switch 31 is attached to the stopper attachment portion 16 with the rear end of the switch board 32 inserted into the engagement recess 34. Screwed.
- the switch pressing portion 21 of the hammer 4 located below the switch body 33 faces the switch body 33!
- the key 4 is placed on the rear key stopper 19 at the rear end while being pressed downward by the weight of the hammer 6 via the adjustment screw 6c. .
- the key 4 rotates counterclockwise around the balance pin 9 in the same figure.
- the key 4 pushes up the hammer 6 via the adjusting screw 6c, so that the hammer 6 rotates clockwise around the hammer fulcrum 17.
- FIG. 3 when the hammer 6 reaches a predetermined rotation angle, the hammer 6 comes into contact with the hammer horn 7, thereby restricting the rotation.
- the front end of the key 4 abuts on the front stopper 8, thereby restricting the rotation of the key 4 (see FIG. 4).
- the second cushion 27 hardly has a local dent, so that the displacement amount of the second cushion 27 can be considerably reduced.
- the displacement amount of the first cushion 25 is also reduced. Further, since the first cushion 25 on the side where the hammer 6 contacts is hard, a good stopping feeling of the hammer 6 without generating a spring feeling can be secured.
- the displacement of the first and second cushions 25 and 27 when the hammer 6 abuts is reduced by the mass body 26 provided between the cushions 25 and 27.
- the displacement of the entire hammer stopper 7 can be significantly reduced, whereby the hammer 16 can obtain a good stop feeling / blow feeling and an improved touch feeling.
- the impact force caused by the contact of each hammer 6 is reduced by the hammer stopper. 7 can be supported by the whole. Thereby, the displacement of the hammer stopper 7 can be further reduced, and the sense of stopping of the hammer 6 can be further improved. Also Hammers Since the number of parts and the number of assembling steps are greatly reduced as compared with the case where the top 7 is provided for each of the non-mmers 6, the manufacturing cost of the electronic piano can be reduced.
- the mass body 26 is hard to vibrate due to its large specific gravity, it is difficult for the mass body 26 to be transmitted to the second cushion 27 due to the vibration force caused by the collision of the hammer 6.
- the vibration transmitted to the second cushion 27 is sufficiently absorbed by the softer second cushion 27. For this reason, transmission of vibration to the action chassis 5 side via the second cushion 27 can be sufficiently suppressed, thereby suppressing noise.
- the hammer 6 comes into contact with the felt 24, it is possible to suppress a collision sound when the hammer 6 comes into contact with the hammer stopper 7. As described above, two effects, that is, the improvement of the touch feeling and the suppression of collision sound and noise can be obtained at the same time.
- the key stopper 8 since the key stopper 8 has the same configuration as the hammer stopper 7, the above-described effect of the hammer stopper 7 is similarly obtained. It is possible to obtain a good sense of stopping the key 4 when it comes into contact with the key.
- FIG. 5 shows a modification of the stoppers 7 and 8 described above with respect to a hammer stopper.
- the mass body 42 made of an iron plate has its front end bent downward at a right angle, and has an L-shaped cross section.
- Other configurations of the hammer stopper 41 are the same as those of the stoppers 7 and 8. With such a bent shape, the rigidity of the mass body 42 is increased, so that the deflection of the mass body 42 at the time of contact of the hammer 6 can be further suppressed, so that the displacement amount of the stopper 41 can be further reduced. Touch feeling can be further improved.
- the present invention can be embodied in various modes without being limited to the embodiments described above.
- the first cushion 25 has the force described as being harder than the second cushion 27.
- the relationship between the hardness of the two cushions 25 and 27 is reversed, or The hardness of both may be the same.
- each of the stoppers 7, 8 may be provided in units of, for example, one octave by dividing the force constituted by one continuous body as a whole of the electronic piano in the length direction.
- other cushions may be laminated on the stoppers 7 and 8 while the first and second cushions 25 and 27 of the embodiment are pressed.
- mass body 26 instead of the illustrated iron plate, another metal plate having high rigidity and specific gravity or an appropriate material other than metal may be used.
- present invention Force applied to both one stopper 7 and front key stopper 8 It may be applied only to the hammer stopper 7 which exerts a relatively large impact force.
- the present invention is applicable to the regulation of the rotation of other types of keyboard instruments, for example, keys of an acoustic piano and a hammer of a piano having a silencing function. Further, the present invention may be applied to the regulation of the rotation of another suitable rotating body, for example, a jack. In addition, the configuration of the details can be appropriately changed within the scope of the present invention.
- the stopper of the present invention is extremely useful in a keyboard instrument, in that it improves the touch feeling by obtaining a good stopping feeling of the rotating body and suppresses collision noise and noise.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/628,254 US7732686B2 (en) | 2004-06-04 | 2005-05-24 | Stopper for keyboard-based musical instruments |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004167756A JP4659394B2 (ja) | 2004-06-04 | 2004-06-04 | 鍵盤楽器のストッパ |
JP2004-167756 | 2004-06-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005119644A1 true WO2005119644A1 (ja) | 2005-12-15 |
Family
ID=35463094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/009440 WO2005119644A1 (ja) | 2004-06-04 | 2005-05-24 | 鍵盤楽器のストッパ |
Country Status (3)
Country | Link |
---|---|
US (1) | US7732686B2 (ja) |
JP (1) | JP4659394B2 (ja) |
WO (1) | WO2005119644A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4946629B2 (ja) * | 2007-05-28 | 2012-06-06 | ヤマハ株式会社 | 電子楽器の鍵盤装置 |
JP5974756B2 (ja) * | 2011-09-20 | 2016-08-23 | ヤマハ株式会社 | 電子鍵盤楽器 |
JP6225076B2 (ja) * | 2014-07-08 | 2017-11-01 | ローランド株式会社 | 電子鍵盤楽器 |
WO2017164232A1 (ja) * | 2016-03-25 | 2017-09-28 | ヤマハ株式会社 | 鍵盤装置 |
DE102018203863A1 (de) * | 2017-03-21 | 2018-09-27 | Kabushiki Kaisha Kawai Gakki Seisakusho | Hammervorrichtung und Klaviaturvorrichtung für ein elektronisches Tasteninstrument |
JP7580307B2 (ja) * | 2021-03-09 | 2024-11-11 | 株式会社河合楽器製作所 | 鍵盤楽器の鍵盤装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0612060A (ja) * | 1992-04-30 | 1994-01-21 | Casio Comput Co Ltd | 鍵盤装置 |
JP2001337668A (ja) * | 2000-05-29 | 2001-12-07 | Roland Corp | 電子楽器の鍵盤装置におけるクッション |
JP2003195853A (ja) * | 2001-10-19 | 2003-07-09 | Yamaha Corp | 鍵盤装置 |
JP2004037484A (ja) * | 2002-06-28 | 2004-02-05 | Kawai Musical Instr Mfg Co Ltd | ハンマーおよび鍵盤装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2737590B2 (ja) | 1992-10-12 | 1998-04-08 | ヤマハ株式会社 | 鍵盤楽器 |
US5374775A (en) * | 1992-06-09 | 1994-12-20 | Yamaha Corporation | Keyboard instrument for selectively producing mechanical sounds and synthetic sounds without any mechanical vibrations on music wires |
JPH06289853A (ja) * | 1993-03-24 | 1994-10-18 | Yamaha Corp | 鍵盤楽器 |
US6011214A (en) * | 1993-11-30 | 2000-01-04 | Yamaha Corporation | Keyboard instruments having hammer stopper outwardly extending from hammer shank and method of remodeling piano into the keyboard instrument |
JP3438741B2 (ja) * | 1994-02-22 | 2003-08-18 | ヤマハ株式会社 | 鍵盤楽器 |
JP4855611B2 (ja) * | 2001-09-12 | 2012-01-18 | 株式会社河合楽器製作所 | ピアノの止音装置 |
-
2004
- 2004-06-04 JP JP2004167756A patent/JP4659394B2/ja not_active Expired - Fee Related
-
2005
- 2005-05-24 WO PCT/JP2005/009440 patent/WO2005119644A1/ja active Application Filing
- 2005-05-24 US US11/628,254 patent/US7732686B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0612060A (ja) * | 1992-04-30 | 1994-01-21 | Casio Comput Co Ltd | 鍵盤装置 |
JP2001337668A (ja) * | 2000-05-29 | 2001-12-07 | Roland Corp | 電子楽器の鍵盤装置におけるクッション |
JP2003195853A (ja) * | 2001-10-19 | 2003-07-09 | Yamaha Corp | 鍵盤装置 |
JP2004037484A (ja) * | 2002-06-28 | 2004-02-05 | Kawai Musical Instr Mfg Co Ltd | ハンマーおよび鍵盤装置 |
Also Published As
Publication number | Publication date |
---|---|
JP4659394B2 (ja) | 2011-03-30 |
JP2005345924A (ja) | 2005-12-15 |
US7732686B2 (en) | 2010-06-08 |
US20080127807A1 (en) | 2008-06-05 |
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