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. 18, 2025
Filed:
Jan. 29, 2020
Audio-technica Corporation, Tokyo, JP;
Yosuke Takubo, Kanagawa, JP;
AUDIO-TECHNICA CORPORATION, Tokyo, JP;
Abstract
An earpiece whose inner cylinder is not crushed when the earpiece is inserted into an ear canal of a user is provided. An earpiece according to the present invention includes an inner cylinderthat includes one open end and the other open end and is attached to a sound conduit C of an earphone E, and an outer cylinderconnected to the one end of the inner cylinder and extending in an umbrella shape toward the other end of the inner cylinder so as to cover an outer surfaceof the inner cylinder. The inner cylinder includes a fitting partinto which a tip of the sound conduit is fitted, and a sound guide partconfigured to guide sound wave from the sound conduit to an ear canal. The sound guide part includes a constant diameter partthat has a constant inner diameter toward the one end side from the other end side and is disposed adjacent to the fitting part, and an expanded diameter partthat has an inner diameter continuously expanding toward one end side from the other end side and is disposed adjacent to the constant diameter part. The other end of the expanded diameter part is disposed closer to the other end side compared to a boundary B between an inner surfaceof the outer cylinder and the outer surface of the inner cylinder in an axial direction orthogonal to a radial direction of the inner cylinder. The length between an inner surfaceof the expanded diameter part and the outer surface of the inner cylinder in the radial direction of the expanded diameter part is the shortest at the boundary.