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:
Mar. 29, 2022
Filed:
Feb. 01, 2021
Almus Corp., Chungcheongnam-do, KR;
Ju Heon Ko, Gyeonggi-do, KR;
Jong Won Lee, Incheon, KR;
Byung Il Min, Gyeonggi-do, KR;
Yun Uk Ha, Incheon, KR;
Jeong Kwon Park, Gyeonggi-do, KR;
ALMUS Corp., Chungcheongnam-do, KR;
Abstract
A speaker unit for an earphone may include a frame; a magnet; a first plate fixed to the frame and in contact with one side of the magnet; a second plate fixed to the frame and in contact with the other side of the magnet; a first coil and a second coil that are disposed to overlap the magnet and the plate in a radial direction; a first diaphragm disposed in front of the magnet and having the first coil fixed thereto; a second diaphragm disposed behind the magnet; and a flexible printed circuit board (FPCB), wherein the FPCB includes a first region including a first contact point connected to the first coil and a second region including a second contact point connected to the second coil and in a front-to-rear direction, the first region is disposed to overlap the first diaphragm in a front-to-rear direction.