The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2025
Filed:
Nov. 01, 2023
Casio Computer Co., Ltd., Tokyo, JP;
CASIO COMPUTER CO., LTD., Tokyo, JP;
Abstract
A keyboard instrument having a key and a link mechanism provided on a lower side of the key, and the link mechanism has a first member having a first fixing fulcrum, a first link pivotally supported on the first fixing fulcrum on one end side, a second member having a second fixing fulcrum provided further forwards and further downwards than the first fixing fulcrum, a second link pivotally supported on the second fixing fulcrum on one end side and a coupling link configured such that a distance between the other end side of the first link rotating about the first fixing fulcrum in response to a key operation and the other end side of the second link rotating about the second fixing fulcrum in response to the key operation is fixed and remains unchanged, and the second link has a counterweight provided further forwards than the second fixing fulcrum.