CN101853646A - String striking machine of low-inertia grand piano - Google Patents
String striking machine of low-inertia grand piano Download PDFInfo
- Publication number
- CN101853646A CN101853646A CN200910131514A CN200910131514A CN101853646A CN 101853646 A CN101853646 A CN 101853646A CN 200910131514 A CN200910131514 A CN 200910131514A CN 200910131514 A CN200910131514 A CN 200910131514A CN 101853646 A CN101853646 A CN 101853646A
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- China
- Prior art keywords
- shakes
- girder
- pedestal
- grand piano
- string instrument
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Abstract
The invention relates to a string striking machine of a grand piano, which is made of a composite or plastic molded product. The molded product makes up the shortages of the traditional piano string striking machine and makes the piano have lighter weight, and therefore, piano players have rapider action reaction. Furthermore, the new string striking machine also has more valuable indirect advantages, can provide manufacturing efficiency and simultaneously has more convenient maintenance.
Description
Technical field:
The present invention relates to a kind of hammered string instrument of grand piano, concretely, relate to a kind of low inertia grand piano hammered string instrument.
Background technology
Existing grand piano hammered string instrument is because of himself materials limitations, and inertia is bigger, is not easy to operation.
Summary of the invention
The objective of the invention is to overcome weak point of the prior art, answering of a kind of grand piano hammered string instrument back cushion bracket component that shakes is provided, its moment of inertia is 14,500-18,500 gram mm
2Between.
The present invention also provides answering of a kind of grand piano hammered string instrument back cushion support heel seat assembly that shakes, and its moment of inertia is 17,500～22,000gram mm
2Between.
The present invention also provides answering of a kind of grand piano hammered string instrument back cushion support heel seat that shakes, and it comprises girder and balance track strutbeam, and wherein above-mentioned balance track strutbeam is connected in described girder, and becomes 5～45 degree angles with girder.
Preferably, described grand piano hammered string instrument answer the back cushion support heel seat that shakes, further comprise balance track adjusting knob quiescent centre 200, wherein, girder/balance track strutbeam connects position 220 and separates a distance 250 from above-mentioned balance track adjusting knob quiescent centre 200, and this distance is less than 15% of the effective length 240 of the pedestal that shakes again.
Preferably, above-mentioned grand piano hammered string instrument answer the pedestal that shakes, comprise a girder, wherein above-mentioned girder is not straight, and further comprises one or more girders angular region.
Preferably, described grand piano hammered string instrument answer the pedestal that shakes, wherein, in the above-mentioned one or more girder angular region 260 towards with shake again pedestal rotation center 30 be connected in reach heel seat in the heart and the direction of the horizontal line 270 of 280 of the pedestals of shaking again consistent.
The present invention also provides a kind of heel seat of grand piano hammered string instrument, and its weight is 0.75～1.75 gram
Grand piano hammered string instrument of the present invention is with compound or moulded goods manufacturing.This mechanograph has remedied piano striking machine, makes its quality lighter, and is therefore, also more rapid to piano playing person's reaction.In addition, new hammered string instrument also has how valuable indirect benefit, not only can provide manufacturing efficient, makes that simultaneously maintenance is more convenient.
Description of drawings
Fig. 1 is the front view of grand piano hammered string instrument.
Fig. 2 is the front view of back cushion bracket component (RBA) that shake again.
Fig. 3 is the front view of the back cushion support heel seat assembly (RBHA) that shakes again.
Fig. 4 is the main element inventory of answering the pedestal that shakes of grand piano.
Fig. 5 and whole relevant the answering of pedestal of shaking the again pedestal that shakes becomes the girder of angular region to arrange.
The pedestal that shakes again a kind of of the prior art of the grand piano of Fig. 6 common interest point relevant with the present invention, that band requires.
Definition is single
| Code | Definition |
| ??10 | The grand piano hammered string instrument |
| ??20 | The guide rod contact |
| ??30 | Pedestal rotation center again shakes |
| ??40 | Grand piano answer the pedestal that shakes |
| ??43 | The hole of auxiliary spring |
| ??46 | Top mallet device adjusting knob filling |
| ??50 | Back cushion |
| ??60 | The back cushion support |
| ??70 | Back cushion bracket component (RBA) again shakes |
| ??80 | The mass centre of RBA |
| ??90 | The effective radius of RBA |
| ??93 | The hole of balance track annex |
| ??96 | The hole of top mallet device annex |
| ??100 | Back cushion support heel seat assembly (RBHA) again shakes |
| ??110 | The mass centre of RBHA |
| ??120 | The effective radius of RBHA |
| ??130 | Top mallet device |
| ??140 | Heel seat |
| ??150 | Balance track |
| ??160 | The balance track adjusting knob |
| Code | Definition |
| ??170 | Top mallet device adjusting knob |
| ??180 | Pedestal girder again shakes |
| ??190 | The balance track strutbeam |
| ??200 | Balance track adjusting knob quiescent centre |
| ??210 | " V " shape of supporting with net is connected |
| ??220 | The link position of girder/balance track strutbeam |
| ??225 | The "T"-shaped connection of prior art |
| ??230 | Prior art answer the pedestal that shakes |
| ??235 | Girder-balance track strutbeam angle |
| ??240 | Shake the again effective length of pedestal |
| ??250 | " girder/balance track strutbeam link position " arrives the distance of " balance track adjusting knob quiescent centre " |
| ??260 | The one-tenth angular region of girder |
| ??270 | Shake again and reach heel seat in the heart in pedestal rotation center and the contact and the horizontal line between pedestal of shaking again |
| ??280 | Heel seat and the center that is connected that shakes again between pedestal |
Embodiment
The claimed element of the present invention is defined as follows:
The specific descriptions of answering the pedestal 40 that shakes of grand piano are seen Fig. 4 and Fig. 6.The pedestal 40 that shakes again is also referred to as boat type bar 40.The piano of the prior art of not running affairs shake again pedestal 40 still be this invention novelty answer the pedestal 40 that shakes, all comprise the pedestal girder 180 that shakes again, top mallet device adjusting knob filling 46 (or end sound spoon prior art method of attachment alternately) and balance track strutbeam 190.Fig. 4 is specifically seen in the description of these main original papers.Girder 180 is supporting balance track floor stringer 190 and top mallet device adjusting knob filling 46, and like this always in the periodic motion of piano striking machine 10.
The pedestal back cushion support 70 that shakes again comprises the pedestal 40 that shakes again, back cushion support 60 and back cushion 50.The specific descriptions of pedestal back cushion bracket component 70 of shaking are again seen Fig. 2.When discharging hammer when the key assignments rest position or with grand piano hammered string instrument bolster, back cushion 50 is supporting relevant hammer.Back cushion 50 is connected on the pedestal 20 that shakes again by back cushion support 60.Can connect this three kinds of elements with any known instrument.Can use glue.It is noted that some grand pianos require back cushions 50 must be attached on the piano striking machine 10, other grand pianos designs then require back cushion 50 to be attached to miscellaneous part except that piano striking machine 10.
Back cushion support heel seat assembly 100 comprises shake again pedestal back cushion bracket component 70 and appended heel seat 140.The specific descriptions of back cushion support heel seat assembly 100 are seen Fig. 3.Can connect these elements with glue or other instruments.When the key stop motion, 40 pairs of piano striking machines 10 of heel seat are done main support, and heel seat 40 is positioned on the guide rod contact 20.Guide rod is fixedly connected on each piano key.Piano striking machine 10 supports at pedestal rotation center 30 places that shake again.The pedestal rotation center 30 that shakes again was maintained fixed during the piano period of motion.Guide rod contact 20 is with piano motion, and promptly press and discharge piano key, and vertical movement up and down.This just moving up and down makes the pedestal 40 that shakes again around pedestal rotation center 30 rotations of shaking again.The rotation of pedestal 40 of shaking again makes the piano hammer impact piano string, and from the string resilience.
Moment of inertia around the rigid body of stationary shaft rotation is ∫ r
2Dm, wherein r refers to the distance between differential particle dm from the rotation center to the rigid body.Can roughly calculate the moment of inertia of piano struck string thermomechanical components with (distance differential particle) 2 * (quality) from rotation center to body dm.
With rotation center 30 distance to the mass centre 80 of RBA, be called the quality 70 of effective radius 90 and the RBA of RBA down, can calculate the moment of inertia of the pedestal back cushion bracket component (RBA) 70 that shakes again more exactly.Moment of inertia in a kind of pattern of the present invention is 17,456gmm
2', RBA weighs 9.35 grams, and the RBA effective radius is 43.19mm.
With the distance of 110 of the rotation centers 30 of the pedestal that shakes again to RBHA substrate amount center, be called the quality 100 of RBHA effective radius 120 and RBHA down, can calculate the moment of inertia 100 of back cushion support heel seat assembly (RBHA).Moment of inertia in a kind of pattern of the present invention is 20,861gmm
2', wherein RBHA weighs 10.31 grams, and the RBHA effective radius is 44.97mm.
A kind of embodiment of the present invention comprises the pedestal 40 that shakes again, and its contained girder is straight not as the girder of answering the pedestal that shakes of prior art, but comprises the angular region 260 that becomes the angle with the heel seat 140 and the piano key guide rod of piano striking machine 10.As shown in Figure 6, the prior art pedestal 40 that shakes does not again have angular region 260.But 40 of the pedestals that shake of answering of the novelty of this invention contain one or more girder angular regions 260.Main because following these two kinds of reasons, it is littler to contain the inertia motion that pedestal 40 produces of shaking of answering of girder angular region.
At first, the girder 180 of band angular region 260 extends downward hammered string instrument heel seat 140 places, and this girder allows much short heel seat 140.Much short that heel seat 140 is desirable, because shorter heel seat is lighter than higher heel seat.The weight of heel seat 140 is very important to the moment of inertia of piano striking machine 10, because heel seat 140 is far away from the pedestal rotation center 30 that shakes again, and is parts heavier in the hammered string instrument 10.The considerable weight that the girder 180 of band angular region 260 can be saved heel seat 140.Such as, as the pattern of the heel seat 140 described in the application's the icon, lighter by 61% than most of heel seat in known field.Girder angular region 260 is parts of girder 180.
Secondly, girder 180 and the band net of 190 of balance track strutbeams support " " hardness ratio 210 that shape is connected transmission is more than "T"-shaped connection 225 transmission of the prior art of the like of the pedestal that shakes again for V.Therefore, the hardness that this designing institute increases can reduce material, reduces the quality of pedestal 40 of shaking of answering of close region 225, and can not reduce the whole hardness requirement of piano striking machine 10.
The pedestal 40 that shakes of answering in a kind of embodiment is included in and connects the balance track strutbeam that 220 places, position connect girder 180, and this connects position next-door neighbour's balance track adjusting knob stagnant zone 200.Girder/balance track strutbeam connection position is the imaginary positions on the pedestal 40 that shakes again, is used for helping explanation invention description.A point of the upper surface of answering the pedestal that shakes that the connection position 220 finger girders 180 of girder/balance track strutbeam and balance track strutbeam are 190.The specific descriptions that connect position 220 are seen Fig. 5.Enforcement profit among Fig. 5 is in the scope of claim 4.
The pedestal that shakes of answering of prior art has girder/balance track strutbeam to connect the position, and this position is away from balance track adjusting knob stagnant zone 200, typical distance 250 generally be shake again pedestal effective length 240 25%.The pedestal effective length of shaking again 240 refer to shake the again distance in 96 in hole of pedestal rotation center 30 and top mallet device annex.There are some the specific descriptions of answering the pedestal 40 that shakes of 220 and 200 prior art see Fig. 6.New design makes the mass centre of the pedestal 40 that shakes again move to the pedestal rotation center 30 that shakes again, therefore need not to sacrifice hardness, can reduce the moment of inertia of piano striking machine 10.
The pedestal 40 that shakes again also comprises the joint angle 235 of the novelty of shake again 190 of pedestal girder 180 and balance track strutbeams.This joint angle 235 generally is 90 degree.The specific descriptions of prior art are seen Fig. 6.As be intended to as described above move shake again pedestal 40 quality, reduce its quality and improve the scientific approach of its hardness so that reduce touching heavily of hammered string instrument 10, we include this design that has acute angle 235 now in, as the optimal mode described in Fig. 5.In this scope of optimal mode angle in claim 3.
Claims (7)
- A grand piano hammered string instrument answer the back cushion bracket component that shakes, its moment of inertia is 14,500-18,500 gram mm 2Between.
- A grand piano hammered string instrument answer the back cushion support heel seat assembly that shakes, its moment of inertia is 17,500～22,000gram mm 2Between.
- A grand piano hammered string instrument answer the back cushion support heel seat that shakes, it comprises girder and balance track strutbeam, wherein above-mentioned balance track strutbeam is connected in described girder, and becomes 5～45 degree angles with girder.
- 4. require the back cushion support heel seat that shakes of answering of the grand piano hammered string instrument described in 3 according to aforesaid right, further comprise balance track adjusting knob quiescent centre 200, wherein, girder/balance track strutbeam connects position 220 and separates a distance 250 from above-mentioned balance track adjusting knob quiescent centre 200, and this distance is less than 15% of the effective length 240 of the pedestal that shakes again.
- A grand piano hammered string instrument answer the pedestal that shakes, comprise a girder, wherein above-mentioned girder is not straight, and further comprises one or more girders angular region.
- 6. grand piano hammered string instrument according to claim 5 answer the pedestal that shakes, wherein, in the above-mentioned one or more girder angular region 260 towards with shake again pedestal rotation center 30 be connected in reach heel seat in the heart and the direction of the horizontal line 270 of 280 of the pedestals of shaking again consistent.
- 7. the heel seat of a grand piano hammered string instrument, its weight are 0.75～1.75 gram.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910131514A CN101853646A (en) | 2009-04-03 | 2009-04-03 | String striking machine of low-inertia grand piano |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910131514A CN101853646A (en) | 2009-04-03 | 2009-04-03 | String striking machine of low-inertia grand piano |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101853646A true CN101853646A (en) | 2010-10-06 |
Family
ID=42805104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910131514A Pending CN101853646A (en) | 2009-04-03 | 2009-04-03 | String striking machine of low-inertia grand piano |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101853646A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090007750A1 (en) * | 2007-06-14 | 2009-01-08 | Clark Bruce E | Low inertia grand piano piano action |
-
2009
- 2009-04-03 CN CN200910131514A patent/CN101853646A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090007750A1 (en) * | 2007-06-14 | 2009-01-08 | Clark Bruce E | Low inertia grand piano piano action |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101006 |