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:
Aug. 02, 2016
Filed:
Dec. 14, 2012
Yamaha Corporation, Hamamatsu-Shi, Shizuoka-Ken, JP;
Kenta Ohnishi, Hamamatsu, JP;
Yuji Takahashi, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
In an actuator (), a bobbin () to which a voice coil () is attached is disposed within a magnetic path space formed by a magnetic path forming section (). A connecting shaft () is coupled to the bobbin (), and a connection end portion (A) at a distal end of the connecting shaft is connected to a sound board of a musical instrument. The length of the shaft () can be adjusted. When the actuator () is attached to the sound board, the length of the shaft () is adjusted and the connection end portion (A) is connected to the sound board while a position of the voice coil () within the magnetic path space is maintained in a predetermined reference mounting position, in a state in which the magnetic path forming unit () is supported in a predetermined position by a support unit ().