Self-locking keyboard bracket

Details Self-locking keyboard bracket Self-locking keyboard bracket

2005-11-29

2005-11-29

Lockett, Kimberly (Department: 2837)

Music

Instruments

Stringed

Reexamination Certificate

active

06969792

ABSTRACT:
A self-locking keyboard bracket is disclosed to include a four-bar linkage, formed of a base frame, a connecting frame, a coupling frame, and a braking mechanism, a supporting frame fastened pivotally with the coupling frame, and an angle adjustment control unit for locking the supporting frame to the coupling frame at the desired angle by means of the operation of a locking bar with a cam. The braking mechanism uses a beveled block to mach with a beveled guide block to further control friction resistance between the base frame and the connecting frame, thereby achieving self-locking of the keyboard bracket.

REFERENCES:
patent: 4641565 (1987-02-01), Tachida et al.
patent: 5861566 (1999-01-01), Kaneko et al.

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