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Buffer for cover on piano keyboard

A keyboard cover and descender technology, which is applied in the field of pianos, can solve the problems of high production cost, exposed descender, and large radial size, etc., and achieve the effects of prolonged service life, low production cost, and increased sense of security

Inactive Publication Date: 2005-02-23
葛国栋 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defects of the above-mentioned descending device for piano keyboard cover are: 1) the descending device is installed on the left or right edge of the keyboard cover, occupying the activity space of the piano user; 2) the descending device is exposed outside, which affects the appearance of the piano; 3) The structure of the upper and lower oil cylinders is complicated, the radial dimension is large, and the production cost is high

Method used

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  • Buffer for cover on piano keyboard
  • Buffer for cover on piano keyboard
  • Buffer for cover on piano keyboard

Examples

Experimental program
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Embodiment Construction

[0011] A piano keyboard cover slow down device, the self-tapping screw 11 forming the roller device is buried in the keyboard cover, the roller 12 is installed on the head of the screw 11 through the pin 13; the tubular cylinder 21 of the self-adaptive oil cylinder 2 is buried in the seat cover , the piston 22, the piston rod 23, the adjustment rod 24, the return spring 25, the right seal 26, and the left seal 27 are all arranged in the tubular cylinder body 21, and the right end of the piston rod 23 is provided with an external thread and an adjustment mechanism that matches the internal thread of the piston 22. Head 23a and oil drain hole 23b, the left end of adjusting rod 24 is provided with the external thread that cooperates with piston 22 internal thread and the adjustment hole 24a that communicates with oil drain hole 23b, is filled with hydraulic oil in the right oil cylinder and left oil cylinder, piston 22, The right seal 26 and the left seal 27 are respectively provi...

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PUM

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Abstract

A relaxed falling device for fingerboard cover of piano consist sof contact roller unit and adaptive hydro-cylinder. It is featured as setting contact roller at internal end face of fingerboard cover and forming adaptive hydro-cylinder by tube body, piston, piston rod, regulation rod, reset spring, right and left sealing, force bearing cap and seal ring.

Description

technical field [0001] The invention relates to a piano, in particular to a piano keyboard cover slow down device. Background technique [0002] The keyboard cover used to cover the piano keyboard is installed on the piano seat cover with hinges. When practicing the piano, the keyboard cover is turned up, and it forms an angle of 75° with the seat cover; It is thick and heavy, and it will fall quickly when it is turned down. A little carelessness will hurt the fingers of the piano practitioner. At the same time, the paint on the front edge of the piano is also easily damaged. In order to solve the above problems, someone installs a keyboard cover slow-down device on the side wood of the keyboard. The slow-down device includes a shaft, a spring and a pulley. When it hits the pulley, the shaft transmits the momentum to the spring, and the spring is used to buffer the falling speed of the keyboard cover. Chinese patent CN 02242883.6 provides a piano keyboard cover slow-down d...

Claims

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Application Information

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IPC IPC(8): G10C3/00
Inventor 葛国栋王建杰
Owner 葛国栋