Title:
耳栓
Document Type and Number:
Japanese Patent JP7074207
Kind Code:
B2
Abstract:
An earplug (51) is provided with: a main body part (1) capable of being fitted into an external auditory canal (Ea) and comprising an air chamber section (121) with a first inner diameter (da1) and one end portion that is open and a duct section (122) protruding from the other end portion of the air chamber section (121) and having a first through-hole (122a) with a second inner diameter (da2) that is smaller than the first inner diameter (da1); and an adjustment part (2) having a second through-hole (23) with a third inner diameter (da3) that is smaller than the first inner diameter (da1), the adjustment part (2) being fitted in the air chamber section (121) of the main body part (1) so as to be movable in the axis direction.
Inventors:
Masashi Uemura
Application Number:
JP2020560000A
Publication Date:
May 24, 2022
Filing Date:
December 05, 2019
Export Citation:
Assignee:
Jvc kenwood corporation
International Classes:
A61F11/08
Domestic Patent References:
| JP1714233Y1 |
Foreign References:
| US2881759 |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Shunichi Takahashi
Shunichi Takahashi
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