String fine-tuning mechanism based on planetary gear transmission with small tooth difference

Abstract

The invention relates to a tuning device for stringed instruments, in particular to a string fine-tuning mechanism driven based on planetary gear transmission with a small tooth difference. The mechanism comprises a positioning sleeve shaft, a winding drum shaft, a positioning mandrel and a tuning device, wherein the winding drum shaft is rotatably arranged in the positioning sleeve shaft, and thepositioning mandrel is rotatably arranged in the winding drum shaft; the tuning device comprises an annular chute fixed to the positioning sleeve shaft and a rotary knob rotatably arranged at the outer edge of the annular chute, one end of the winding drum shaft is positioned in the annular chute and coaxially and fixedly provided with a pin disc, and an offset transmission shaft is eccentricallyarranged in the rotary knob; a planetary gear is coaxially and rotatably arranged on the offset transmission shaft and is in meshing transmission connection with an inner gear ring positioned on theinner edge of the annular chute, a plurality of pin holes are also formed in the planetary gear, pin shafts which are in inscribed matching with the pin holes are correspondingly arranged on the pin disc, and the diameter of each pin shaft is smaller than the aperture of the corresponding pin hole so that the planetary gear can drive the pin disc to rotate. The mechanism can achieve fine-tuning ofthe tightness of strings and generates low noise during tuning of the strings, and the influence of temperature and humidity on the mechanism is small.

Description

technical field [0001] The invention relates to a tuning device for a stringed musical instrument, in particular to a string fine-tuning mechanism driven by a planetary gear with a small tooth difference. Background technique [0002] Stringed instruments such as violins and cellos need to be tuned before use to ensure the best sound when playing, especially for violins, tuning is particularly important. [0003] Stringed instruments such as violins and cellos are not only instruments, but also handicrafts. They have high requirements on shape and size, and the design of automatic tuning mechanism is difficult. [0004] At present, there are usually holes in the head of the piano, and solid wooden tuning rods are inserted into the two holes, the strings are fixed and coiled on the tuning rods, and the tuning rods are rotated through the knobs on the tuning rods. Carry out tuning and tuning. Use this method to fine-tune the strings, so that the tuning accuracy is poor, the ...

AI Technical Summary

Problems solved by technology

Using this method can not fine-tune the strings, making the tuning accuracy poor, inconvenient to operate, and easy to cause wear to the piano itself every time the strings are tuned

Affected by temperature, humidity, etc., it will generate a lot of noise during use, the accuracy and quality of tuning will be affected, and the long-term use effect will not be good.

Images