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. 17, 2021
Filed:
Jul. 07, 2020
Almus Corp., Chungcheongnam-do, KR;
Byung Il Min, Gyeonggi-do, KR;
ALMUS Corp., Chungcheongnam-Do, KR;
Abstract
Disclosed is an earphone including an internal duct. The earphone includes a housing, a cover coupled to the housing and including a nozzle, and a speaker unit disposed in the cover. Here, the housing and the cover include, in common, a first space portion disposed in front of the speaker unit and a second space portion disposed in the rear of the speaker unit and partitioned from the first space portion. The speaker unit includes a yoke, a magnet fixed to the yoke, a plate disposed on a top surface of the magnet, a voice coil, a diaphragm disposed above the plate and to which the voice coil is fixed, a frame disposed outside the magnet, a first grill coupled to the frame and disposed above the diaphragm, and a second grill coupled to the frame and disposed on a front surface of the diaphragm and outside the frame.