CN1189908A - Piano frame - Google Patents
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- CN1189908A CN1189908A CN97190401A CN97190401A CN1189908A CN 1189908 A CN1189908 A CN 1189908A CN 97190401 A CN97190401 A CN 97190401A CN 97190401 A CN97190401 A CN 97190401A CN 1189908 A CN1189908 A CN 1189908A
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Abstract
A frame of an acoustic piano is provided. This frame is provided with a frame body on which strings are stretched, and a reinforcement member fixed to the frame body and holding the tension of the strings working on the frame body. The frame body is also provided with a capo d'astro bar used to determine the length of a string separately from the frame body.
Description
Technical field
The present invention relates to the framework of the acoustic piano that is used for grand piano and so on.
Background technology
Fig. 9 shows the common framework of existing grand piano.Framework 100 forms the shape shown in the figure by metal casting, and its front end is provided with a plurality of tuning pins 101, and the rear end is provided with a plurality of pins 102 of setting the tone.Corresponding to a plurality of strings 103 of each key of piano (scheming not shown) by predetermined tension force in the tuning pin 101 and the stretching between the pin 102 of setting the tone.
High line at piano, press the boom plate (not shown) to be formed on the key 100a of portion of framework 100, the back side of 100b highlightedly, string 103 is via this pressures boom plate and be arranged on long-chord sign indicating number 105 on the soundboard (scheming not shown) in the tuning pin 101 and the stretching between the pin 102 of setting the tone.Above-mentioned pressure boom plate is what to be matched with the length (to call " chord length " in the following text) that limits string 103 with the string sign indicating number pin 106 of long-chord sign indicating number 105 by extruding string 103, and is equipped with the sword (not shown) that contacts with string 103.Said sword is after casting out framework 100, by by hand or the back side of the key 100a of portion, the 100b of machinery (milling machine) cutting framework 100 and forming continuously.
On the other hand, in the middle basso of piano, string 103 is via wearing string spare 104 and long-chord sign indicating number 105 or short string sign indicating number 107 in the tuning pin 101 and the stretching between the pin 102 of setting the tone.Wear string spare 104 and constitute by threaded portion 104a and head 104b as shown in figure 10, be installed on the framework 100 through the threaded hole (not shown) that screw chasing processes by this threaded portion 104a is screwed on framework 100 surfaces.
And the head 104b that wears string spare 104 is provided with 1 to 3 aperture 104c, and string 103 can pass these apertures 104c.All be provided with one corresponding to each key of piano and wear string spare 104, it is used for correctly limiting the space of string 103 and levelness and chord length (being meant the chord length between the string sign indicating number pin 108 of the string sign indicating number pin 106 of wearing string spare 104 and long-chord sign indicating number 105 or short string sign indicating number 107 in this case).Thus, in middle basso one side of piano, even in place that a key has used 2 to 3 strings particularly in these 2 to 3 places that string stretches obliquely, also can be by making the isometric sound that makes of string in full accord.
In available frame 100, to carry out following three processing operations between the stretching string 103 promptly with said structure: (1) press boom plate sword manufacture operation; (2) screw chasing of a plurality of threaded holes processing operation; (3) will wear the operation that string spare 104 is screwed into threaded hole.
But, owing to must overturn heavy whole framework 100 in the operation so that operation or machinery (milling machine) form sword by hand manufacturing of the sword of (1), in the screw chasing processing operation of (2), must cut a plurality of threaded holes and a plurality of string spares 104 of wearing must be screwed into threaded hole respectively being screwed in the operation of (3), so, each operation in the processing operation of said frame 100 all needs a large amount of work and time, thereby becomes the reason that manufacturing cost rises.
And, when carrying out string stretching operation after the framework processing operation of above-mentioned (1) to (3), in middle basso, make string 103 one by one pass the aperture 104b of string spare 104, and in high line, then string 103 one by one will be passed at the downside of pressing boom plate, so, all need a large amount of work and time, this equally also is the reason that cost rises.
In addition, framework 100 is to accommodate and be fixed in the supporting shell (scheming not shown), and this supporting shell is to assemble up mutually by bearing part, inside casing and a plurality of pillar (scheming not shown) that will constitute with timber respectively to form.Specifically, carrying aforementioned soundboard on the supporting shell, this soundboard is provided with framework 100, and the periphery of bearing part then is provided with side plate (scheming not shown).Framework 100 is fixed on the bearing part of supporting shell with soundboard by wood screw 109 in its end, and framework 100 several positions in the central are fixed on the pillar of supporting shell by framework bolt 110.And, be arranged on inside casing and contact with framework 100 lower end Hubei Province portion with the adjustment bolt (scheming not shown) of the pillar regulator of the joint portion of pillar.
On the other hand, in grand piano, in general, the whole tension force of string 103 can reach 17 to 20 tons and always act on framework 100, and thus, framework 100 can deflections.This deflection of framework 100 will as very big and bend loading and compression load by framework 100 end and framework bolt 110 and adjust pillar and bearing part and the inside casing etc. that bolt acts on supporting shell.So the pillar of supporting shell and bearing part and inside casing etc. cooperatively interact and are supporting bigger bend loading and compression load.Like this, in grand piano, utilize framework and supporting shell to support bigger string tension force.
In the structure of above-mentioned existing grand piano,, supporting shell must have been made sizable intensity in order to match with framework 100 with the very big tension force of supporting string 103.For this reason, not only to increase the area in each cross section of pillar, bearing part and the inside casing etc. that constitute supporting shell, simultaneously, they must be assembled up mutually securely.Its result, not only material cost can rise, and assembly cost also can rise thereby assembling is wasted time and energy, thereby manufacturing cost is improved.And the supporting shell that constitutes with timber also has the problem of Nian Jiuyi deterioration, poor durability.
As solution to the problems described above, for example, can consider to alleviate the load that acts on the supporting shell by the rigidity that improves framework 100.But, increasing the situation of its thickness for the rigidity that improves framework 100, it is heavy that framework 100 can become, and accounts for about 1/3 of piano weight altogether, so the general assembly (TW) of piano can increase significantly.In addition, as if the rigidity that improves framework 100 by the shape that changes framework 100, the mold of then essential redesign framework 100 and the structure of piano, thus cause cost to rise significantly.
Disclosure of an invention
First purpose of the present invention provides a kind of piano frame, and it can not increase the manufacturing cost and the weight of piano significantly and can reduce to act on the string tension force of supporting shell by the rigidity that improves framework.
Second purpose of the present invention provides a kind of piano frame, and it can carry out the processing operation and the string stretching operation of framework at an easy rate and therefore reduce manufacturing cost.
In order to realize above-mentioned first purpose, according to first kind of form of the present invention, a kind of like this piano frame is provided, it is equipped with chassis body and the reinforcement that is provided with string with stretching mode, and this reinforcement is installed on the said frame main body and is bearing the string tension force that acts on this chassis body.
According to above-mentioned piano frame, can be by being installed in the rigidity that reinforcement on the chassis body improves framework.Thereby, do not need to increase the thickness of chassis body or change its shape, thereby the weight of piano and manufacturing cost can not increase significantly.In addition, can bear most string tension force with framework, reduced to act on the string tension force of supporting shell, that is to say, owing to reduced pillar, bearing part and the inside casing etc. of supporting shell as the strength member role, so, can obtain supporting shell is simplified or being omitted its a part of effect such as the area of section that reduces pillar etc. or the radical etc. that reduces pillar.
Reinforcement preferably is installed on the position of chassis body, at this position, the tension force of string as crooked compressive load in chassis body.
According to above-mentioned optimal morphology, owing to support this bending compression load with reinforcement at the position that crooked compression load acted on that acts on the chassis body, so, can improve the rigidity of framework effectively.
Reinforcement preferably is made of the pillar that is fixed on a plurality of supports on the chassis body and be fixed between above-mentioned a plurality of support.
According to above-mentioned optimal morphology, because framework and pillar are splits, so, when being installed to reinforcement on the chassis body, the selection of installation site has big degree of freedom, and the size of reinforcement and shape also have bigger degree of freedom, so, on existing framework, also can install at an easy rate.
In addition, in order to realize above-mentioned second purpose, according to second kind of form of the present invention, a kind of like this piano frame is provided, it is equipped with stretching mode and the chassis body of many strings is set and presses boom plate, and the many strings that this pressure boom plate is fixed on the said frame main body and pushing stretches is provided with are so that determine its chord length.
According to above-mentioned piano frame and since press boom plate be with chassis body mutually the mode of split constitute, so, even resupination framework main body not, also can press boom plate sword manufacture operation.And, can after stretching is provided with string in advance, fix the pressure boom plate again, therefore, when string stretching operation, there is no need to make string below pressing boom plate, to bore.Its result can easily and carry out the processing operation and the operation of stretching string of framework efficiently.
The pressure boom plate preferably pushes the corresponding many strings of gamut with piano like this, so that limit the length of these strings.
According to above-mentioned optimal morphology, set pressure boom plate has covered the gamut of piano, so basso does not wear string spare in not needing in the past.Thus, do not need to be used for to pacify the screw chasing operation of a plurality of threaded holes to the framework and this is worn the operation of screwing that string spare is screwed into above-mentioned threaded hole with wearing string spare, simultaneously, need in the operation of stretching string, not make string pass the operation in the hole of opening on the string spare.Therefore, can easily and carry out the processing operation and the string stretching operation of framework efficiently.
Press boom plate preferably to constitute by a plurality of pressure boom plates that separate mutually along the range direction.
According to above-mentioned optimal morphology, manufacturing when pressing boom plate, can produce a plurality of pressure boom plates respectively, and, press boom plate to make sword respectively to each, so, can press at an easy rate boom plate sword manufacture operation.
Press and preferably be provided with the locating device that many strings is positioned along laterally on the boom plate.
According to above-mentioned optimal morphology, also can lean on locating device to limit the space of string even without wearing string spare, so, can be equipped with that the piano of wearing string spare is the same to make the interval between the string uniform.
Open the position of establishing many strings at corresponding key, preferably will many strings respectively with it the straight line that is linked to be each other of a plurality of positions of the pressure boom plate that cooperated with it respectively of the straight line that is linked to be each other of a plurality of string sign indicating number pins of cooperation and many strings the two be configured to be parallel to each other.
According to above-mentioned optimal morphology, open the position of establishing many strings at corresponding key, because these many string chord lengths are identical and parallel, so, also can be with being equipped with the piano of wearing string spare equally to make from identical corresponding to the sound that a plurality of string sent of a key even without wearing string spare.
Simple declaration to accompanying drawing
Fig. 1 is that the side of grand piano that the framework of one embodiment of the invention has been installed is cutd open skeleton diagram;
Fig. 2 is the vertical view of the framework among Fig. 1;
Fig. 3 is that Fig. 2 A-A is to analysing and observe skeleton diagram;
Fig. 4 is two cut-open views of pressing the connecting portion of boom plate;
Fig. 5 is the partial enlarged drawing of Fig. 2;
Fig. 6 is the cut-open view of Fig. 5 along the string bearing of trend;
Fig. 7 is the front view that partly shows the basso structure of pressing boom plate;
Fig. 8 shows at corresponding key and opens the string of the position of establishing many strings, the configuration relation figure of string sign indicating number pin and pressure boom plate;
Fig. 9 is the vertical view of existing piano frame;
Figure 10 is the existing stereographic map of wearing string spare.
Implement optimal morphology of the present invention
Following with reference to the description of drawings grand piano framework relevant with one embodiment of the invention.With reference to Fig. 1, be provided with bearing part 3 in the inboard of the side plate 2 of this grand piano G, be provided with inside casing 4 between the leading section of bearing part 3, be provided with a plurality of pillars 5 (only showing) between bearing part 3 and the inside casing 4.The front of inside casing 4 is equipped with revolving part 7 by center 6.Bearing part 3, inside casing 4 and pillar 5 have constituted supporting shell, are carrying soundboard 8 on this supporting shell, and the framework relevant with the present invention 1 is installed on the soundboard 8.
As shown in Figure 3, framework 1 is made of chassis body 19 and the reinforcement 20 that is installed in chassis body 19 lower surfaces.Chassis body 19 is the same with available frame, is cast as shape shown in Figure 2.The curve-like hinder marginal part of this chassis body 19 is that many groups of (for example t group) stationary installations of one group are fixed on the bearing part 3 of supporting shell with soundboard 8 by a screw 9 and two tenons 10.And the leading section of chassis body 19 is fixed on the pin plate 14 by six bolts, 12 grades.In addition, chassis body 19 is fixed on the pillar 5 of supporting shell by three framework bolts 11 in the position that relies on central authorities.
In addition, set the tone pin 15 and be arranged on to stretch between a plurality of steel tuning pins 16 of leading section many strings 17 are arranged of a plurality of steels that are arranged on chassis body 19 rear portions.The overall tension force of these strings 17 can reach about 17 to 20 tons, usually resultant action is in chassis body 19, from the shape of chassis body 19 and the balance on the mechanics, described tension force in Fig. 1 be with can make chassis body 19 upward the bending moment of convex curved act on the chassis body 19.
Support 21 usefulness screws coupling arrangements such as (or) bolts 24 are fixed on the lower surface of the key 19a of portion.Equally, a plurality of screws 25 of support 22 usefulness also are fixed on the lower surface of leading section of chassis body 19.And a plurality of screws 26 of pillar 23 usefulness are fixed on shown in dot-and-dash line among the figure between the two stands 21,22 like that.
Thus, be arranged on the downside of the both side ends of chassis body 19, can make framework 19 bending moment that tension force was produced of convex curved upward with what reinforcement 20 bore string 17 by the reinforcement that rigidity is big 20.Particularly, the pillar 23 of reinforcement 20 is held chassis body 19 and is not made it deflection when keeping out above-mentioned bending moment.Therefore, improved the integral rigidity of the framework 1 that is made of chassis body 19 and reinforcement 20, the result can be supported most of tension force of string 17 by framework 1.
The result, the tension force that acts on the string 17 on the supporting shell can become very little, that is to say, the bearing part 3 of supporting shell, inside casing and pillar 5 etc. can diminish as the effect of strength member, so, can or reduce their area of section, or the number of minimizing pillar 5 is to simplify supporting shell or to omit a part.And simplification and omission by above-mentioned supporting shell can reduce its material cost and assembly cost, and then reduce the manufacturing cost of piano.
In addition, constitute the support 21,22 of reinforcement 20 and pillar 23 and constitute by light metals such as duralumin, so, compare with the practice that increases frame thickness, be accompanied by the increase of rigidity and the weight of the framework 1 that increases is very little.In addition, because the support 21,22 and the pillar 23 of reinforcement 20 be screwed on chassis body 19, so, can utilize existing framework, as long as being set, threaded hole just reinforcement 20 can be installed thereon.Thereby, the shape of framework needn't be changed and the change of thing followed mold design needn't be carried out, can improve the rigidity of framework 1 in mode cheaply.
In the above-described embodiments, reinforcement 20 is arranged on the key 19a of portion, the 19b of both side ends of chassis body 19, and is still necessary, also can be arranged on other the key 19c of portion, 19d, 19e (with reference to Fig. 2).In addition, although pillar 23 is fixed on the support 21,22 of reinforcement 20 with coupling arrangements such as screw or bolts, but the groove that suitable shape also can be set can also be cast as one with support 21,22 and chassis body 19 pillar 23 is embedded between the support 21,22.
Have, in the above-described embodiments, the light and big metal of rigidity constitutes reinforcement 20 by duralumin etc., but also can be with constituting this reinforcement with chassis body 19 with the parts of material or the existing parts that obtain easily again.Therefore, cost is descended.In addition, the foregoing description is the example that the present invention is applicable to grand piano, but it also is applicable to upright piano.
With reference to Fig. 2, further specify the formation of grand piano G, framework 1 also is equipped with the pressure boom plate 31 that is installed on the chassis body 19.This pressure boom plate 31 be used for be installed in soundboard 8 above short string sign indicating number 32 and long-chord sign indicating number 33 match to limit the chord length of each string 17.
Press boom plate 31 and chassis body 19 to be made of metal equally and by middle basso with and the pressure boom plate 40,41 used of high line interconnect and form, it is provided with extending ground from the left part of chassis body 19 to the gamut of the piano of right part.Press boom plate 31 to be fixed on the chassis body 19 by five screws 34 in the position of the key 19a to 19e of portion.This screw 34 injects and is arranged on the hole (40b among Fig. 4,41b, other is not shown) of pressing on the boom plate 31, is threadedly engaged with the threaded hole 35 (with reference to Fig. 4) that is arranged on the key 19a to 19e of portion.And, press boom plate 40,41 to be connected with each other by screw 34 for two in the position that the key 19d of portion with framework 19 intersects.
As shown in Figure 4, at two connecting portions of pressing boom plates 40,41, the teat 41a of the pressure boom plate 41 that the teat 40a of the pressure boom plate 40 that middle basso is used and high line are used be meshed and with upper surface and the contacts side surfaces of the key 19d of portion.And, form said hole 40b, 41b in the mode that connects two teat 40a, 41a.By screw 34 is inserted this hole 40b, 41b, be threadedly engaged with the threaded hole 35 of the key 19d of portion, two pressure boom plates 40,41 can be connected with each other and be fixed on the chassis body 19.
On the other hand, to shown in Figure 7, banded sword 43 is formed on the lower surface of pressing boom plate 31 continuously as Fig. 5.As shown in Figure 6, be wound on string 17 on the tuning pin 16 at tuning pin 16 and press and to be in sword 43 that the capotasto 42 that is set on chassis body 19 upper surfaces upwards pressed boom plate 31 in the pushing states of pushing downwards between the boom plate 31, stretch via short string sign indicating number 32 or long-chord sign indicating number 33 under this state is set to the pin 15 of setting the tone always.
As Fig. 5 and shown in Figure 7, from four sounds of double bass to the string 17 for this reason that extends from tuning pin 16 hang over from outstanding four register pins (locating device) 44 in the bottom surface of pressing boom plate 40 and in the left side of Fig. 5, move near to an end after the string sign indicating number pin 32a by weak point string sign indicating number 32 stretch always and be set on the pin 15 of setting the tone.When string 17 from setting the tone pin 15 when directly extending to tuning pin 16, the interval of string 17 its mutual sounds till double bass to the four sounds can be easy to narrow down with the shape of chassis body 19 and the tuning pin 16 position relation with the pin 15 of setting the tone, and said structure can be eliminated this problem to guarantee the predetermined space of string 17,17 sounds.Each register pin 44 is metal, by driving in this perforate in the pre-position perforate of pressing boom plate 40 bottom surfaces and with register pin 44 in advance, presses on the boom plate 40 thereby register pin 44 is fixed on.
Have again, as shown in Figure 8, the position that a corresponding key uses two to three strings 17 in the alt portion of piano, for example, three strings 17 will be respectively with six string sign indicating number pin 33a of long-chord sign indicating number 33,33b contacts and the sword 43 with pressure boom plate 31 contacts three positions.In this situation, the straight line L1 that three string sign indicating number pins 33 of pressure boom plate 4 one sides are linked to be parallels with the straight line L2 that three contact positions of string 17 contact edges 43 are linked to be.Owing to adopt this structure, can make the position of using two to three strings 17 at a corresponding key, the chord length of string 17 is equal to each other, and string 17 is parallel to each other.Thereby, can make two to three sound that string 17 is sent of a corresponding key in full accord, do not need to use the existing string spare of wearing.
Below explanation comprises the process and assemble operation of the framework 1 of pressing boom plate 31 and the stretching operation of string 17.
A. at first form threaded hole in the pre-position on chassis body 19 surfaces that cast, it is used for installing pressure boom plate 31.
B. in addition, produce pressure boom plate 40,41 and on its bottom surface, form sword 43 by casting etc.Available handwork or machinery (milling machine) carry out the operation of manufacturing of above-mentioned sword.
C. then, tuning pin 16 is installed on the pin plate 14 that is fixed in chassis body 19, simultaneously, the pin 15 of will setting the tone is installed on the chassis body 19.And, at the tuning pin 16 and all strings 17 that gently stretch between the pin 15 of setting the tone.
D. will press boom plate 40 to be connected with each other, the pressure boom plate 31 that couples together like this will be fixed on the chassis body 19 by screw 34 with pressing boom plate 41.
E. after this, the finished product of soundboard 8 is installed on the supporting shell, framework 1 mounting after on the supporting shell, is hung over string 17 on string sign indicating number 32a, 33a, the 33b, the tension force of adjustment string when strain string 17 by rotation tuning pin 16.
As mentioned above, framework 1 according to present embodiment, chassis body 19 is splits with pressing boom plate 31, and, press boom plate 31 to be divided into pressure boom plate 40,41 two parts, so, with different in the past, the sword of pressing boom plate manufacture operation the time, the very heavy chassis body 19 of needn't overturning, the operation meeting of manufacturing of sword is easy to carry out.And, will press boom plate 31 to be installed on the chassis body 19 after can on the chassis body 19 of all strings 17, slowly stretching, so, with different in the past, needn't make string 17 pass the below of pressing boom plate 31, thereby can carry out string stretching operation expeditiously.
And, owing to omitted and worn string spare, so, do not need to be used to install the screw chasing processing operation of a plurality of threaded holes of wearing string spare and will to wear the operation of screwing that string spare is screwed into a plurality of threaded holes, and to compare in the past, the processing operation of framework 1 is very simple.In addition, because of same reason does not need the operation that makes string 17 pass the hole on the string spare, so, can also further carry out string stretching operation efficiently.
Thus and since press boom plate 31 and chassis body 19 be split and be divided into two parts and omitted and worn string spare, so the process and assemble operation of framework 1 and the stretching operation of string 17 all can efficiently and easily be carried out, thereby have reduced manufacturing cost.
In the above-described embodiments, though be, also can be to be divided into the above structure of three parts with pressing boom plate 31 to be divided into to press the such structure of boom plate 40,41.In addition, though with screw 34 as pressing boom plate 31 to be fixed in the stationary installation of chassis body 19, be not limited thereto, also can use other suitable stationary installations such as bolt.
In addition, in the above-described embodiments, although be provided with four register pins 44 as locating device at the back side of pressing boom plate 31, this quantity can be arbitrarily.Moreover, can replace register pin 44 with sword 43 extensions the direction that direction intersects to be set groove is set, and string 17 is limited in this groove in sword 43 upper edges of pressing boom plate 31.In addition, as long as can support the tension force of string 17, pressing the shape of the sword 43 of boom plate 31 also can be Any shape.The possibility of utilizing on the industry
According to piano frame of the present invention, particularly in the grand piano,, can reduce to act on the string tension force of supporting shell by not causing increasing the manufacturing cost of piano and the rigidity that weight improves framework significantly at acoustic piano.And, can efficiently and easily carry out the processing operation of framework and the stretching operation of string, thus, can be used to reduce manufacturing cost.
Claims
Modification according to the 19th of treaty
1. (deletion)
2. (deletion)
3. (deletion)
4. piano frame, it is equipped with chassis body and the pressure boom plate that stretches many strings are set, this pressure boom plate has the sword that extends along its length, and become split to constitute with the aforesaid frame main body, in the time of on being fixed on this chassis body, limit the chord length of aforementioned string by many strings that push aforementioned stretching setting with aforementioned sword.
5. piano frame as claimed in claim 4 is characterized in that, described pressure boom plate is pushing aforementioned and the corresponding many strings of piano gamut, to limit the length of these strings.
6. piano frame as claimed in claim 5 is characterized in that, described pressure boom plate is by constituting along the separated a plurality of pressure boom plates of range direction.
7. piano frame as claimed in claim 6 is characterized in that, described pressure boom plate is provided with along the locating device of laterally determining described many chord positions.
8. piano frame as claimed in claim 7 is characterized in that, described locating device is from the outstanding downwards register pin of the lower surface of aforementioned pressure boom plate.
9. piano frame as claimed in claim 5 is characterized in that, described pressure boom plate is provided with along the locating device of laterally determining described many chord positions.
10. piano frame as claimed in claim 9 is characterized in that, described locating device is the following outstanding register pin that faces down from aforementioned pressure boom plate.
11. as any piano frame in the claim 4 to 10, it is characterized in that, stretching at a corresponding key is provided with the position of many described strings, with aforementioned many strings institute respectively the straight line configuration one-tenth that is connected with each other of a plurality of positions of the aforementioned pressure boom plate that contacted respectively of the straight line that is connected with each other of a plurality of string sign indicating number pins of contact and aforementioned many strings be parallel to each other.
Claims (11)
1. piano frame, it is equipped with to stretch the chassis body and the reinforcement of string is set, and this reinforcement is installed on the said frame main body and is bearing the string tension force that acts on this chassis body.
2. piano frame as claimed in claim 1 is characterized in that, described reinforcement is installed in the following position of chassis body, at this position, the tension force of aforementioned string as crooked compressive load in described chassis body.
3. as the piano frame of claim 1 or 2, it is characterized in that described reinforcement is made of the pillar that is fixed on a plurality of supports on the aforesaid frame main body and be fixed between above-mentioned a plurality of support.
4. piano frame, it is equipped with and stretches chassis body that many strings are set and press boom plate, this pressure boom plate be fixed on the said frame main body and many strings pushing above-mentioned stretching setting to limit the chord length of these strings.
5. piano frame as claimed in claim 4 is characterized in that, described pressure boom plate is pushing aforementioned and the corresponding many strings of piano gamut, to limit the length of these strings.
6. piano frame as claimed in claim 5 is characterized in that, described pressure boom plate is by constituting along the separated a plurality of pressure boom plates of range direction.
7. piano frame as claimed in claim 6 is characterized in that, described pressure boom plate is provided with along the locating device of laterally determining described many chord positions.
8. piano frame as claimed in claim 7 is characterized in that, described locating device is from the outstanding downwards register pin of the lower surface of aforementioned pressure boom plate.
9. piano frame as claimed in claim 5 is characterized in that, described pressure boom plate is provided with along the locating device of laterally determining described many chord positions.
10. piano frame as claimed in claim 9 is characterized in that, described locating device is the following outstanding register pin that faces down from aforementioned pressure boom plate.
11. as any piano frame in the claim 4 to 10, it is characterized in that, stretching at a corresponding key is provided with the position of many described strings, with aforementioned many strings institute respectively the straight line configuration one-tenth that is connected with each other of a plurality of positions of the aforementioned pressure boom plate that contacted respectively of the straight line that is connected with each other of a plurality of string sign indicating number pins of contact and aforementioned many strings be parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97190401A CN1189908A (en) | 1996-04-19 | 1997-04-18 | Piano frame |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP122531/96 | 1996-04-19 | ||
| JP137583/96 | 1996-05-08 | ||
| CN97190401A CN1189908A (en) | 1996-04-19 | 1997-04-18 | Piano frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1189908A true CN1189908A (en) | 1998-08-05 |
Family
ID=5178731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97190401A Pending CN1189908A (en) | 1996-04-19 | 1997-04-18 | Piano frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1189908A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100483507C (en) * | 2003-03-28 | 2009-04-29 | 郎妙金 | Bamboo piano and its manufacturing method |
| CN102598115A (en) * | 2009-09-09 | 2012-07-18 | R·E·奥瓦斯 | Improvements in piano construction |
-
1997
- 1997-04-18 CN CN97190401A patent/CN1189908A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100483507C (en) * | 2003-03-28 | 2009-04-29 | 郎妙金 | Bamboo piano and its manufacturing method |
| CN102598115A (en) * | 2009-09-09 | 2012-07-18 | R·E·奥瓦斯 | Improvements in piano construction |
| CN102598115B (en) * | 2009-09-09 | 2013-09-25 | R·E·奥瓦斯 | Improvements in piano construction |
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