CN110047453A - It is a kind of for the hammer retainer with acoustics and the piano of silent mode - Google Patents
It is a kind of for the hammer retainer with acoustics and the piano of silent mode Download PDFInfo
- Publication number
- CN110047453A CN110047453A CN201910345578.3A CN201910345578A CN110047453A CN 110047453 A CN110047453 A CN 110047453A CN 201910345578 A CN201910345578 A CN 201910345578A CN 110047453 A CN110047453 A CN 110047453A
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- CN
- China
- Prior art keywords
- fixed
- piano
- qin case
- acoustics
- block
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Classifications
-
- 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
- G10C3/16—Actions
- G10C3/166—Actions for damping the strings
-
- 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
- G10C3/26—Pedals or pedal mechanisms; Manually operated sound modification means
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
The invention discloses a kind of for the hammer retainer with acoustics and the piano of silent mode, including qin case, the inside of the qin case is equipped with key, bottom surface inside the qin case is equipped with pedal, the bottom surface of the qin case is fixed with supporting leg, the inside of the qin case is equipped with fixed plate, the upper surface of the fixed plate is fixed with groove, the inside of the groove is connected with adjuster, the inside of the adjuster is fixedly connected with adjusting block, the inside of the qin case is equipped with string, the string is fixedly connected through adjusting block with fixed plate, the inside of the qin case is equipped with metal track, the top of the metal track is equipped with mute item, the top of the metal track is fixed even to have fixed block.This is used for the hammer retainer of the piano with acoustics and silent mode, is arranged between hammer and string by metal track by the impact force absorbing material with different densities, embodies being stopped at for hammer flexibly with acoustics and silent mode switching.
Description
Technical field
The present invention relates to piano technical fields, specially a kind of to stop for the hammer with acoustics and the piano of silent mode
Dynamic device.
Background technique
Acoustic piano is converted the input power of finger or actuator for shifting energy using specific and independent system
At vibration force acoustically, the transmission system of this commonly referred to as actuation gear is a kind of net being made of lever, pad and hammer
Shape object, the mesh receive finger by the set of the pivot rotaring lever of multiple entitled " keys ", the input power of actuator, key and
Actuation gear concentrates input power to rotate the hammer with certain proportion density, these hammers are positioned for the line that impact tenses
Material string, hammer and corresponding string are configured to match with their acoustic characteristic meticulously, to form being tapered for component
Or the scale of gradual change, the accumulation of these components generate multiple tone spans with multiple music frequencies, string is used as medium, passes through
The vibration of media energy transfer is into the loudspeaker of such as soundboard or electric loudspeaker, and in the loudspeaker, being eventually converted into can
The sound heard.
Piano can produce the volume to have a wide reach, and large-scale piano can also expand above range, including very loud
Sound, such as the piano played in concert, this kind of piano is configured to play in band without bullhorn, in the world
All generally receive piano in a variety of culture fields of range, they are present in family, school, organization etc., this generation
The peripheral region of the musical instrument of sound inevitably occurs that sound must be controlled or reduces the situation of volume, many piano manufacturers
Mute mechanism is set in their piano, for selectively limiting audio volume level, these mechanism by include rotation track,
Impact force absorbing material with different densities is temporarily placed between hammer and string by the rotation track, but hammer only
Move with acoustics and silent mode switching it is inflexible, influence playing effect.
Summary of the invention
The purpose of the present invention is to provide a kind of for the hammer retainer with acoustics and the piano of silent mode, with solution
Certainly the problems mentioned above in the background art.
To achieve the above object, the invention provides the following technical scheme: it is a kind of for the steel with acoustics and silent mode
The hammer retainer of qin, including qin case, the inside of the qin case are equipped with key, and the bottom surface inside the qin case is equipped with pedal, institute
The bottom surface for stating qin case is fixed with supporting leg, and the inside of the qin case is equipped with fixed plate, and the upper surface of the fixed plate is fixed to be connected
Fluted, the inside of the groove is connected with adjuster, and the inside of the adjuster is fixedly connected with adjusting block, the qin case
Inside is equipped with string, and the string is fixedly connected through adjusting block with fixed plate, and the inside of the qin case is equipped with metal track, institute
The top for stating metal track is equipped with mute item, and the top of the metal track is fixed even to have a fixed block, the fixed block it is upper
Surface is fixed with qin track road piece, and the fixed block is fixedly hinged with metering needle by pin shaft, and the metal track passes through pin
Axis and metering needle fixed hinge, the upper surface of the metal track offer through-hole, and the bottom surface of the mute item is fixed even to be had
First stop needle, the first stop needle extend through and extend to the lower section of metal track, and the bottom surface of the metal track is solid
Surely connect with the second stop needle, equipped with retainer, the front of the qin case, which offers, steps on slot, described to step on slot for the inside of the qin case
Inside be connected with pedal, the pedal runs through the inside stepped on slot and extend to qin case, and the upper surface of the pedal is fixedly connected
There is braking roll, the bottom surface of the metal track is fixed with folder string block.
Preferably, the left end of the mute item is fixedly connected with block, and the block is soft material.
Preferably, the bottom surface of the mute item is fixedly connected with spring, the one end of the spring far from mute item and qin sound
Track piece is fixedly connected.
Preferably, the upper surface of the pedal is fixed even has connecting rod, and the top of the connecting rod is fixedly connected with quiet
Sound block.
Preferably, the right end loneliness of the pedal even has foot-operated block, and the thickness of the foot-operated block is at least one centimetre.
Preferably, the upper surface of the qin case is equipped with support rod, and the support rod vertical length value is less than the width of qin case.
Preferably, the top of the braking roll is equipped with mute needle, and mute needle is tapered.
Preferably, the front of the qin case is equipped with piano seat, and the piano seat is rectangle.
Beneficial effect
The present invention provides a kind of for the hammer retainer with acoustics and the piano of silent mode, has following beneficial
Effect:
1, the hammer retainer for being used to have the piano of acoustics and silent mode, is fixedly connected by the left end of mute item
There is block, block is soft material, and having reached prevents silent mode unstable, the sound quality of piano performance is improved, by mute
The bottom surface of item is fixedly connected with spring, and the one end of spring far from mute item is fixedly connected with qin track road piece, has reached convenient for adjusting
Pitch is saved, the protection to piano internal component is improved；
2, support rod is equipped with by the upper surface of qin case, support rod vertical length value is less than the width of qin case, has reached side
Just to the support of bedroom piano top plate, playing effect is improved；
3, change correspondingly the elastic of string to reach the mesh for changing pitch by the mutual cooperation of adjuster and adjusting block
Such as pass through downward push pedal by trampling mode selection pedal, then by pedal lateral rotation to lockably engaging position
It sets, so that keeping mute performance mode to be joined to mute performance mode selection pedal is connected to cable or connecting rod, the cable or company
Bar is connected to rail actuator component, in some cases, when mode selection pedal moves to its bonding station, with mode
Selection switch engagement, mode selection pedal can be maintained at it by pawl, the bracket etc. in such as magnet, piano shell and engage position
It sets；
4, by metal track mechanism by the setting of impact force absorbing material with different densities hammer and string it
Between, it embodies being stopped at for hammer flexibly with acoustics and silent mode switching, improves playing effect.
Detailed description of the invention
Fig. 1 is the top view of qin case of the present invention；
Fig. 2 is the cross-sectional view of qin case front view of the present invention；
Fig. 3 is the cross-sectional view of qin case side view of the present invention；
Fig. 4 is structure enlargement diagram at A in Fig. 2 of the present invention.
In figure: 1 qin case, 2 piano seats, 3 keys, 4 supporting legs, 5 foot-operated blocks, 6 support rods, 7 step on slot, 8 pedals, 9 braking rolls,
10 mute needles, 11 connecting rods, 12 mute pieces, 13 fixed plates, 14 grooves, 15 adjusting blocks, 16 adjusters, 17 strings, 18 folder string blocks,
It is 19 metal tracks, 20 second stop needles, 21 through-holes, 22 metering needles, 23 fixed blocks, 24 qin track road pieces, 25 springs, 26 mute
Item, 27 blocks, 28 retainers, 29 first stop needles.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case where violating intension of the present invention, therefore the present invention is not limited to the specific embodiments disclosed below.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Fig. 1-4 is please referred to, the present invention provides a kind of technical solution: a kind of for the piano with acoustics and silent mode
The front of hammer retainer, including qin case 1, qin case 1 is equipped with piano seat 2, and piano seat 2 is rectangle, and passes through the upper surface of qin case 1
Equipped with support rod 6,6 vertical length value of support rod is less than the width of qin case 1, has reached support of the convenience to bedroom piano top plate,
Playing effect is improved, the inside of qin case 1 is equipped with key 3, and the bottom surface inside qin case 1 is equipped with pedal 8, and the bottom surface of qin case 1 is fixed
Be connected with supporting leg 4, the inside of qin case 1 is equipped with fixed plate 13, and the upper surface of fixed plate 13 is fixed with groove 14, groove 14 it is interior
Portion is connected with adjuster 16, and the inside of adjuster 16 is fixedly connected with adjusting block 15, and the inside of qin case 1 is equipped with string 17, string
17 are fixedly connected through adjusting block 15 with fixed plate 13.
The inside of qin case 1 is equipped with metal track 19, which is formed with two layers of relatively thin layer, such as closes
The suitable material for absorbing sound and/or power, as materials described below any one: felt, cloth, microfibre, leather, slim foam
Deng being also formed with and be arranged between thin layer and rail body and that the material by suitably absorbing sound and/or power is formed is thicker
Layer, such as materials described below any one: the opposite close or relatively soft foam of matter, the opposite close or relatively soft felt of matter, stop
28 track of device has 19 main body of metal track, such as the high hard material of steel or other suitable metals, plastics or other intensity,
19 body surfaces of metal track are formed with relatively thin layer, such as suitable material for absorbing sound and/or power, such as materials described below
Any one: felt, cloth, microfibre, leather, slim foam etc. are also formed with and are arranged between thin layer and rail body simultaneously
Thicker two layers of the layer that material by suitably absorbing sound and/or power is formed, as materials described below any one: opposite matter is close
Or relatively soft foam, or relatively soft felt close with respect to matter etc..
28 track of retainer has 19 main body of metal track in the figure, as steel or other suitable metals, plastics or its
The high hard material of its intensity, the layer in the embodiment has relatively uniform thickness, and the thickness of layer is gradually thinning, i.e. top
The thickness of edge is thicker, to form inclined 28 surface of retainer, the top of metal track 19 is equipped with mute item 26, by mute
The left end of item 26 is fixedly connected with block 27, and block 27 is soft material, and having reached prevents silent mode unstable, improves steel
The sound quality that qin is played.
Spring 25, the one end of spring 25 far from mute item 26 and qin track road are fixedly connected with by the bottom surface of mute item 26
Piece 24 is fixedly connected, and has been reached convenient for adjusting pitch, and the protection to piano internal component is improved, and the top of metal track 19 is solid
Surely connect with fixed block 23, the upper surface of fixed block 23 is fixed with qin track road piece 24, and fixed block 23 passes through the fixed hinge of pin shaft
It is connected to metering needle 22, by pin shaft and 22 fixed hinge of metering needle, the upper surface of metal track 19 offers logical metal track 19
Hole 21, the bottom surface of mute item 26 is fixed even to have the first stop needle 29, and the first stop needle 29 extends through 21 and extends to metal
The lower section of track 19, the bottom surface of metal track 19 is fixed even to have the second stop needle 20.
The inside of qin case 1 is equipped with retainer 28, and the front of qin case 1, which offers, steps on slot 7, and the inside for stepping on slot 7 is connected with pedal
8, the right end loneliness of pedal 8 even has foot-operated block 5, and the thickness of foot-operated block 5 is at least one centimetre, solid by the upper surface of pedal 8
Surely connect with connecting rod 11, the top of connecting rod 11 is fixedly connected with mute piece 12, has reached the tuning control for facilitating performance personnel
System improves convenience, and pedal 8 runs through the inside stepped on slot 7 and extend to qin case 1, and the upper surface of pedal 8 is fixedly connected with stop
Axis 9 is equipped with mute needle 10 by the top of braking roll 9, and mute needle 10 is tapered, has reached to the mute of string 17, has improved
The sound quality of piano, the bottom surface of metal track 19 are fixed with folder string block 18.
Working principle: change correspondingly the elastic of string 17 to reach by the mutual cooperation of adjuster 16 and adjusting block 15
Change the purpose of pitch by trampling mode selection pedal 8 as then arrived 8 lateral rotation of pedal by pressing down on pedal 8
Lockably bonding station, thus keep mute performance mode be joined to mute performance mode selection pedal 8 be connected to cable or
Connecting rod, the cable or connecting rod are connected to rail actuator component, in some cases, connect when mode selection pedal 8 moves to it
It when coincidence is set, is engaged with mode selection switch 8, mode selection pedal 8 can pass through the pawl in such as magnet, piano shell, branch
Frame etc. is maintained at its bonding station, is existed by 19 mechanism of metal track by the impact force absorbing material setting with different densities
Between hammer and string 17, embodies being stopped at for hammer flexibly with acoustics and silent mode switching, improve playing effect.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of for the hammer retainer with acoustics and the piano of silent mode, including qin case (1), it is characterised in that: institute
The inside for stating qin case (1) is equipped with key (3), and the internal bottom surface of the qin case (1) is equipped with pedal (8), the bottom surface of the qin case (1)
It is fixed with supporting leg (4), the inside of the qin case (1) is equipped with fixed plate (13), and the upper surface of the fixed plate (13) is fixed
It is connected with groove (14), the inside of the groove (14) is connected with adjuster (16), and the inside of the adjuster (16) is fixedly connected
Have adjusting block (15), the inside of the qin case (1) is equipped with string (17), and the string (17) runs through adjusting block (15) and fixed plate
(13) it is fixedly connected, the inside of the qin case (1) is equipped with metal track (19), and the top of the metal track (19) is equipped with mute
Item (26), the top of the metal track (19) is fixed even to have fixed block (23), and the upper surface of the fixed block (23) is fixed
It is connected with qin track road piece (24), the fixed block (23) is fixedly hinged with metering needle (22), the metal track by pin shaft
(19) by pin shaft and metering needle (22) fixed hinge, the upper surface of the metal track (19) is offered through-hole (21), described
The bottom surface of mute item (26) is fixed even to have the first stop needle (29), and the first stop needle (29) is through through-hole (21) and extends
To the lower section of metal track (19), the bottom surface of the metal track (19) is fixed even to have the second stop needle (20), the qin case
(1) inside is equipped with retainer (28), and the front of the qin case (1), which offers, to be stepped on slot (7), the inside clamping for stepping on slot (7)
Have pedal (8), the pedal (8) runs through the inside stepped on slot (7) and extend to qin case (1), and the upper surface of the pedal (8) is fixed
It is connected with braking roll (9), the bottom surface of the metal track (19) is fixed with folder string block (18).
2. according to claim 1 a kind of for the hammer retainer with acoustics and the piano of silent mode, feature
Be: the left end of the mute item (26) is fixedly connected with block (27), and the block (27) is soft material.
3. according to claim 1 a kind of for the hammer retainer with acoustics and the piano of silent mode, feature
Be: the bottom surface of the mute item (26) is fixedly connected with spring (25), the one end of the spring (25) far from mute item (26)
It is fixedly connected with qin track road piece (24).
4. according to claim 1 a kind of for the hammer retainer with acoustics and the piano of silent mode, feature
Be: the upper surface of the pedal (8) is fixed even to have connecting rod (11), and the top of the connecting rod (11) is fixedly connected with quiet
Sound block (12).
5. according to claim 1 a kind of for the hammer retainer with acoustics and the piano of silent mode, feature
Be: the right end loneliness of the pedal (8) even has foot-operated block (5), and the thickness of the foot-operated block (5) is at least one centimetre.
6. according to claim 1 a kind of for the hammer retainer with acoustics and the piano of silent mode, feature
Be: the upper surface of the qin case (1) is equipped with support rod (6), and support rod (6) the vertical length value is less than the width of qin case (1)
Degree.
7. according to claim 1 a kind of for the hammer retainer with acoustics and the piano of silent mode, feature
Be: the top of the braking roll (9) is equipped with mute needle (10), and mute needle (10) is tapered.
8. according to claim 1 a kind of for the hammer retainer with acoustics and the piano of silent mode, feature
Be: the front of the qin case (1) is equipped with piano seat (2), and the piano seat (2) is rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910345578.3A CN110047453A (en) | 2019-04-26 | 2019-04-26 | It is a kind of for the hammer retainer with acoustics and the piano of silent mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910345578.3A CN110047453A (en) | 2019-04-26 | 2019-04-26 | It is a kind of for the hammer retainer with acoustics and the piano of silent mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110047453A true CN110047453A (en) | 2019-07-23 |
Family
ID=67279672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910345578.3A Pending CN110047453A (en) | 2019-04-26 | 2019-04-26 | It is a kind of for the hammer retainer with acoustics and the piano of silent mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110047453A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5451706A (en) * | 1992-02-14 | 1995-09-19 | Yamaha Corporation | Automatic player piano equipped with mute lock system for reproducing faint sounds in playback mode |
| KR20030076307A (en) * | 2002-03-22 | 2003-09-26 | 야마하 가부시키가이샤 | Hammer stopper having position adjuster thereon and composite keyboard musical instrument having the same |
| US20090100980A1 (en) * | 2007-10-11 | 2009-04-23 | Kabushiki Kaisha Kawai Gakki Seisakusho | Upright piano |
| US20120240743A1 (en) * | 2009-04-24 | 2012-09-27 | Steinway Musical Instruments, Inc. | Hammer stoppers for pianos having acoustic and silent modes |
| CN202796012U (en) * | 2012-05-29 | 2013-03-13 | 北京一轻研究院 | Mute device for piano |
| CN103383842A (en) * | 2012-04-02 | 2013-11-06 | 施坦威音乐器材有限公司 | A hammer stop for a piano with acoustic and silent modes |
| WO2014024261A1 (en) * | 2012-08-07 | 2014-02-13 | Tagami Tadayuki | Sound-damping system for upright piano, sound-damping system for grand piano, and support device |
| CN107408374A (en) * | 2015-03-25 | 2017-11-28 | 雅马哈株式会社 | Audible device, keyboard instrument and sounding control method |
-
2019
- 2019-04-26 CN CN201910345578.3A patent/CN110047453A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5451706A (en) * | 1992-02-14 | 1995-09-19 | Yamaha Corporation | Automatic player piano equipped with mute lock system for reproducing faint sounds in playback mode |
| KR20030076307A (en) * | 2002-03-22 | 2003-09-26 | 야마하 가부시키가이샤 | Hammer stopper having position adjuster thereon and composite keyboard musical instrument having the same |
| US20090100980A1 (en) * | 2007-10-11 | 2009-04-23 | Kabushiki Kaisha Kawai Gakki Seisakusho | Upright piano |
| US20120240743A1 (en) * | 2009-04-24 | 2012-09-27 | Steinway Musical Instruments, Inc. | Hammer stoppers for pianos having acoustic and silent modes |
| CN103383842A (en) * | 2012-04-02 | 2013-11-06 | 施坦威音乐器材有限公司 | A hammer stop for a piano with acoustic and silent modes |
| CN202796012U (en) * | 2012-05-29 | 2013-03-13 | 北京一轻研究院 | Mute device for piano |
| WO2014024261A1 (en) * | 2012-08-07 | 2014-02-13 | Tagami Tadayuki | Sound-damping system for upright piano, sound-damping system for grand piano, and support device |
| CN107408374A (en) * | 2015-03-25 | 2017-11-28 | 雅马哈株式会社 | Audible device, keyboard instrument and sounding control method |
Non-Patent Citations (2)
| Title |
|---|
| 梁艺红: "《试论影响钢琴音色的因素》", 《歌海》, no. 02, 10 March 2009 (2009-03-10) * |
| 胡伟: "《静音钢琴***及安装案例(以FreeKey***版本2.7为例)》", 《乐器》, no. 02, 5 February 2013 (2013-02-05) * |
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