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. 24, 2023
Filed:
Jun. 30, 2021
Em-tech Co., Ltd., Gyeongsangnam-do, KR;
Yong Ju Ji, Gyeongsangnam-do, KR;
Jun Hee Han, Gyeongsangnam-do, KR;
Young Woo Kim, Gyeongsangnam-do, KR;
EM-TECH CO., LTD., Gyeongsangnam-Do, KR;
Abstract
Provided is an earphone having a pressure equilibrium structure capable of preventing a decrease in acoustic characteristics or sound pressure, while having a structure capable of achieving equilibrium within an ear canal. The earphone includes a receiver including a frame, a magnetic circuit, a voice coil, and a diaphragm, a front housing surrounding a front and a side surface of the receiver and including a sound tube, a rear housing attached to a rear of the receiver and coupled to the front housing, and a duct located between the diaphragm and the sound tube. An acoustic path through which sound is emitted is formed from the receiver to an end of the sound tube. The front housing or the rear housing includes a leakage hole. An inner end of the duct is connected to the acoustic path. An outer end of the duct is connected to the leakage hole.