String rust removal device for grand piano

Abstract

The invention discloses a string rust removal device for a grand piano. The device comprises a piano plate and a piano pedal, wherein multiple pairs of fixing blocks used for fastening strings are fixed on the piano plate; sliding slots are formed at the positions, below the strings, in the piano plate; a cylindrical cavity is formed under each sliding slot; a piston is arranged in each cylindrical cavity to divide the cylindrical cavity into a first cavity and a second cavity; a sliding rod is fixed between left and right inner walls of each cylindrical cavity; each sliding rod penetrates through the corresponding piston; a first spring is arranged on the part, positioned in the corresponding second cavity, of the corresponding sliding rod in a sleeving manner; an elastic air bag is bonded to the lower end of the piano pedal; the air outlet end of the elastic air bag communicates with each first cavity via an air inlet pipe; and a ball valve and a check valve are installed in each airinlet pipe. The device is reasonable in structure, capable of removing rust without dismounting the strings, simple and rapid to operate, and capable of rapidly and effectively scraping rusty spots on the outer side walls of the strings

Description

technical field [0001] The invention relates to the technical field of grand pianos, in particular to a rust removal device for strings of a grand piano. Background technique [0002] The grand piano is used for large-scale performances or professionals. The structure consists of six parts: string row, soundboard, bracket, keyboard system (including black and white keys and hammers), pedal mechanism (including top rod and pedal) and shell. . [0003] The main material of the piano strings is low carbon steel, which is easy to rust in a humid environment. Two necessary conditions for metal rust: oxygen and water (generally refers to the moisture in the air). The more moisture in the air the metal is in contact with, the faster it will rust. The strings of the piano are exposed, and it is easy to rust when exposed to the outside air. The rusted strings generally do not affect the sound quality, but if the degree of rust is large, the impact on the sound quality is also great...

AI Technical Summary

Problems solved by technology

However, the strings of the piano are exposed outside, and they are easy to rust when exposed to the outside air. Generally, the rusty strings will not affect the sound quality, but if the degree of rust is large, the degree of influence on the sound quality is also great. The method of rust often needs to remove the strings, wipe them with a dry rag, and then install them. It must be done by professionals, otherwise the installation will cause errors in the tension of the strings and affect the sound quality.

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