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:
Jan. 05, 2021
Filed:
May. 10, 2019
Onkyo Corporation, Osaka, JP;
Hajime Yoshimura, Osaka, JP;
Onkyo Corporation, Osaka, JP;
Abstract
The vibrator includes a frame defining an internal space, a voice coil fixed to the frame in the internal space, a shaft member arranged along an axial direction of the coil in the internal space, a magnetic circuit arranged slidably relative to the shaft member and having a magnetic gap in which the coil is arranged, and a compression coil spring arranged between one end side of the magnetic circuit and one end side of the frame along the axial direction in the internal space. The compression coil spring is a coiled wave spring configured such that a plate-shaped steel wire is multiple-wound in a spiral shape in a circumferential direction of the shaft member to alternately form a peak portion and a trough portion at an equal interval and the peak portion and the trough portion contact each other in the axial direction.