CN2251181Y - Light string straining device for piano - Google Patents

Abstract

The utility model relates to a string straining device for pianos, and is characterized in that two naked strings form a homophony string group, a treble string column of even tension and equal diameter and a bass string column of equal length and unequal diameter are achiasmate at the same plane, the lower end of each treble string is lengthened a portion properly so that F=G/2 adjusts out an octave melochord of a fundamental tone to beautify tone color. Because the string number is decreased three times, the tension of each string is decreased three times, piano keyboards are reduced properly, and the treble string column and the bass string column are achiasmate range at the same plane, the string straining device is lighted, the ingress of pianos of small piano body, light weight, cheap price, good tone quality and handiness into vast middle schools, primary schools, kindergarten and salaried households becomes probable.

Description

Light-duty piano is opened string mechanism

What the utility model related to piano opens string mechanism, is to improve a kind of light-duty piano that proposes and open string mechanism by existing piano being opened string mechanism.

Piano belongs to keyboard instrument, has experienced bicentenary evolution and has finalized the design already.Piano is formed by opening string mechanism, hammered string instrument structure and qin shell three parts.Open string mechanism and be positioned at the rear of qin shell, mainly form by wooden timbering (4), retort stand (5), soundboard (6) and more than 260 string (1) etc.Wooden timbering (4) is a quadra, and string shaft (2) is fixed on wooden timbering (4) top.Vaulted soundboard (6) is buckled on the wooden timbering (4) of string shaft (2) below.Retort stand (5) is tabular ironcasting, is fastened on the wooden timbering (4) tension force of together support string.Be fixed with some pegs (3) on the string shaft (2), an end of each bar string (1) is wrapped on the corresponding peg (3), and the other end is fixed on the string clothes-hook (9) of retort stand (5) by flat nail (8).Common piano has 88 sounds.The unisonance string group common pronunciation that the naked string of each sound all is made up of three strings.88 sounds of such piano then need about 260 strings, and to the bass series arrangement, its length, diameter, tension force also progressively increase according to the pitch needs these 260 strings (1) thereupon by high pitch.The bass string row that thick and long bass string is formed and the high pitch string row antarafacial of high pitch string composition intersect placement, are stretched on retort stand (5) and the wooden timbering (4).The string of each root tensioning (1) is pressed on the soundboard (6) by string sign indicating number (7), the pronunciation of soundboard radiation string vibration piano, and this has just constituted the beam string structure of opening of piano.By every string mean tension is 80 kilograms of calculating, and total tension force of a piano is the 18-20 ton.88 sounds of common piano, range is A ₂-C ⁵, 1.4 meters of qin body width weigh more than 150 kilograms.

Existing piano is luxurious valuable, be only applicable to art theater, entertainment venue, wealthy family, but be difficult to enter vast salary family, the music education of a lot of middle and primary schools, kindergarten, mostly still use organ owing to can not use this type of luxurious valuable piano, in " Hope Project " " spring flower bud engineering ", vast children are badly in need of the initiation of act of music, for adapting to the needs of China's new period act of music education, the vast music-lover's of wage-earners needs, making light economical piano is the manufacturing task of top priority of piano.

The utility model purpose is to answer above-mentioned needs, under the prerequisite that keeps existing piano applicable performance, start with from alleviating the total tension force of string, the string mechanism of opening to existing piano has done to improve to greatest extent, provide a kind of piano that can make to become light and economical and practical, the light-duty piano that is particularly useful for the piano of vast middle and primary schools, kindergarten's music education and the use of salary family is opened string mechanism.

The concrete scheme that the purpose of this utility model is achieved is as follows:

The light-duty piano that the utility model provides is opened the string mechanism characteristics: the unisonance string group of this string mechanism is made up of two naked strings; String tension force is the 29-31.5 kilogram, and the string in high pitch (T) district adopts isostension, equal diameter, the string row design of unequal length; The string in bass (B) district adopts equal length, the design of anisodiametric string row, and treble string row and bass area string row are positioned at same plane is not had cross arrangement.

In addition, the light-duty piano with said structure is opened the string in high pitch (T) district of string mechanism, and the lower end of every string all can adapt to one section string of lengthening, makes F=G/2 access the humorous synaeresis of octave of this string fundamental tone, to beautify piano sound.

Play for non-piano specialty, the key at 88 common key fingerboard two ends generally be to use less than, can be suitable leave out several descants and several double bass, like this, the light-duty piano that the utility model provides is opened the string of string mechanism can do corresponding adjustment, effectively reduces the total tension force of string.

Describe the utility model in detail below in conjunction with accompanying drawing:

The light-duty piano that accompanying drawing 1 provides for the utility model is opened string mechanism structure synoptic diagram,

Accompanying drawing 2 is the A-A cut-open view of accompanying drawing 1.(1)-string wherein, (2)-string shaft, (3)-peg, (4)-wooden timbering, (5)-retort stand, (6)-soundboard, (7)-string sign indicating number, (8)-flat nail, (9)-string clothes-hook, T-treble, B-bass area, E-E portion.

String (1) is the sounding body of piano, and its upper end is wrapped on the peg (3), and peg (3) is anchored in the string shaft (2), and string (1) lower end is fixed on the string clothes-hook (9) on the retort stand (5) by flat nail (8).The high pitch string of being made up of the high pitch string that is positioned at the bass string row of being made up of the bass string in bass (B) district and is positioned at that high pitch (T) distinguishes is listed in same plane and arranges, be stretched on retort stand (5) and the wooden timbering (4), the string of tensioning (1) is pressed on the soundboard (6) by string sign indicating number (7), and soundboard radiation vibrations of strings makes the string pronunciation loud and clear.

The light-duty piano that the utility model provides is opened string mechanism and is had the following advantages:

1. the unisonance group is two naked strings, makes the string quantity of piano reduce 1/3, thereby makes total tension force of piano string reduce 1/3.

2. the tension force of every string is designed to the 26-31.5 kilogram, has promptly adopted the low-tension string, makes the total tension force of string again further to be reduced to 1/3, adopts isodiametric high pitch string to bring great convenience for the manufacturing and the maintenance of piano.

3. be positioned at the high pitch string row in high pitch (T) district and be positioned at the bass string row isoplanar in bass (B) district and the thick supporting rib that achiasmate arrangement has saved common piano bass string row and high pitch string row antarafacial intersection, effectively alleviate the retort stand casting weight, and the assembly technology of simplification piano, also owing to cancelled the peg deck on the retort stand, promptly cancel the E portion in the accompanying drawing 1, further alleviate retort stand weight, can make string shaft wooden exposed again, peg is fully imbedded the string shaft increase and is held peg power, improves piano accuracy in pitch stability.

4. the minimizing of the total tension force of string can make wooden timbering save intermediate column, is no dorsal column piano.

5. the humorous synaeresis of octave is set, between treble string flat nail (8) chord clothes-hook (9), increases general string length, make F=G/2 access the humorous synaeresis of octave of this string fundamental tone, beautify piano sound.

6. play for non-piano specialty, the key at 88 key fingerboard two ends be to use less than, and half a century has only 57 keys with the organ that is used as the music education main tool, for reaching the more suitable purpose of piano, 88 keys are suitably left out several descants and several double bass key, except that the total tension force of effective minimizing piano string, also can make the small and exquisite piano of being convenient to carry of width.

Embodiment is a string mechanism of the light-duty piano of 68 keys:

1). get i.e. 68 the range (A of 68 keys ₄-e ⁴), two on the naked string of every sound, 136 strings altogether, 96 of its alt strings, 40 of bass strings, every high pitch string diameter 0.8mm, 28 kilograms of tension force are uneven in length, in the 50-800mm scope, every bass string length 810mm, tension force, diameter do not wait.The total tension force of string is 3.8 tons, is 1/4 of common piano, and qin is wide to be 1074 millimeters, and the qin gross weight is 1/3 of a common piano.

Claims (2)

1. a light-duty piano of mainly being made up of wooden timbering (4), retort stand (5), soundboard (6) and string (1) is opened string mechanism, it is characterized in that: unisonance string group is made up of two naked strings (1), every string tension force is the 29-31.5 kilogram, high pitch (T) district string is the string row of isostension, equal diameter, unequal length, the string in bass (B) district is an equal length, isostension, anisodiametric string are not listed as, and high pitch (T) Qu Xian row and bass (B) Qu Xian row isoplanar do not have cross arrangement.

2. opening string mechanism by the described light-duty piano of claim 1, it is characterized in that: suitably extends one section in the lower end of the string (1) in every high pitch (T) district.

Images