Wooden sound window of Erhu

Abstract

The invention relates to a wooden sound window of Erhu. The wooden sound window of Erhu consists of a window body and a frame. The size of the wooden sound window of Erhu can change correspondingly when the size of a sound window position of an Erhu tube changes. The technical scheme includes that the sound window is made of a board with the wood fiber direction perpendicular to the board surfaceor is made of a spliced sound window board obtained by splicing of multiple boards with the wood fiber directions parallel to the board surfaces, so that edges of the sound window with the longitudinal wood fiber directions are eliminated, a difference in swelling and shrinkage between the sound window and the Erhu tube is decreased substantially, and synchronous swelling and shrinkage of the sound window and the Erhu tube is achieved; the annual ring direction and the wood swelling and shrinkage of the boards for producing the sound window are totally identical with those of boards for producing the Erhu tube, so that the difference in the swelling and shrinkage between the sound window and the Erhu tube is eliminated, synchronous equal swelling and shrinkage between the two is realized,and cracking of the Erhu tube due to the sound window hindering its swelling and shrinkage is avoided.

Description

technical field [0001] The invention belongs to the field of production of national musical instruments, and in particular relates to a wooden erhu sound window. Background technique [0002] At present, what is installed on the erhu produced by the manufacturers of national musical instruments is all sound windows made up of form 1 and frame 2. The materials used to make this sound window are mainly wood and plastics. The installation method is to make the sound window frame 2 The inside and outside are glued together with the piano tube. [0003] Note: The words "vertical" and "parallel" appearing in the application documents are only used for directional explanations, not purely mathematical concepts. [0004] One of the basic characteristics of wood is swelling and shrinking when the wood is in a humid environment for a long time, the wood will absorb a certain amount of water, the volume will expand, and the overall size will become larger; when the temperature of the ...

AI Technical Summary

Problems solved by technology

[0019] The present invention provides a wooden erhu sound window to solve the disadvantages in the use of wood and the utilization of boards in the process of making traditional wooden erhu sound windows, which cause the wood fiber direction 13 to be longitudinal on the sound window , this kind of wood fiber direction 13 is the longitudinal side, which will strongly hinder the expansion and contraction of the corresponding side of the piano tube, causing the problem that the piano tube is easy to crack and the glue joint between the sound window and the piano tube is easy to open

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