Title: Keyboard musical instrument equipped with automatic top board spacer
Application Number: 200410001490 Application Date: 2004.01.09
Publication Number: 1523570 Publication Date: 2004.08.25
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G10C1/00,G10C3/00
Applicant(s) Name: Yamaha Corp. Address:
Inventor(s) Name: Shirayanagi Eiichi
Attorney & Agent: ge jing li xiaoshu
Abstract:
     A keyboard musical instrument such as a grand piano has a front top board (14) and a rear top board (13) with which an upper opening (11a) of a piano case (11) is closed, and the rear top board (13) is confronted with the front top board (14) at the closing position; an automatic board spacer (12) is provided between the front top board (14) and the piano case (11), and automatically increases the gap (S) after the rear top board (13) leaves the closing position and decreases the gap (S) at the arrival of the rear top board (13) at the closing position, thereby preventing the user's fingers from pinch between the front and rear top boards (13/ 14).
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