US 7,550,658 B2
Keyboard musical instrument with fallboard located at proper position and rotary connector used for fallboard
Takamitsu Suzuki, Milton Keynes (United Kingdom); Akira Nakamura, Hamamatsu (Japan); and Akio Suzuki, Hamamatsu (Japan)
Assigned to Yamaha Corporation, Hamamatsu-Shi (Japan)
Filed on Nov. 21, 2006, as Appl. No. 11/603,412.
Claims priority of application No. 2006-004811 (JP), filed on Jan. 12, 2006.
Prior Publication US 2007/0157794 A1, Jul. 12, 2007
Int. Cl. G10C 3/02 (2006.01)
U.S. Cl. 84—179  [84/178; 16/235; 16/236; 16/237; 16/242] 18 Claims
OG exemplary drawing
 
1. A rotary connector provided between a case of a musical instrument and a cover plate rotatable about an axis extending in a lateral direction of said case, comprising:
a stationary portion connected to one of said cover plate and said case;
a rotatable portion connected to the other of said cover plate and said case, and rotatable with respect to said stationary portion; and
a position adjuster provided in association with one of said stationary portion and said rotatable portion, and permitting said one of said stationary portion and said rotatable portion to be moved to an optimum position on a virtual plane defined by an up-and-down direction and an fore-and-aft direction of said case, wherein said position adjuster has
main fastener receptacles and fasteners fastening said one of said stationary portion and said rotatable portion to associated one of said case and said cover plate in an assemblage between said case and said cover plate so as to place said case and said cover plate in a position relative to each other and
auxiliary fastener receptacles, offset from main fastener receptacles, and fasteners fastening said one of said stationary portion and said rotatable portion to said associated one of said case and said cover plate in a second offset placement assemblage after a movement on said virtual plane from the position determined in the first assemblage to a more optimum position when said first relative position is unsuitable, said auxiliary fastener remaining unused if said first relative position is suitable.