Title:
SPEAKER
Document Type and Number:
WIPO Patent Application WO/2021/117663
Kind Code:
A1
Abstract:
The present invention makes adhesion between a voice coil and a bobbin secure and robust, improves input resistance, and prevents a diaphragm from falling from the voice coil bobbin. Provided is a speaker in which a neck portion is formed in a central opening portion of a diaphragm, the neck portion protruding toward the back of the diaphragm. A gap is formed between an outer peripheral surface of a voice coil bobbin and an inner peripheral surface of the neck portion. The upper surface of the neck portion is positioned lower than the front surface of the outer peripheral portion of the diaphragm, and an adhesive receiving portion forming a recess is provided. The adhesive fills the adhesive receiving portion and the gap, and reaches a lower end of the neck portion, whereby the neck portion and the voice coil bobbin are secured to each other.
Inventors:
MURAKAMI MAKOTO (JP)
Application Number:
PCT/JP2020/045415
Publication Date:
June 17, 2021
Filing Date:
December 07, 2020
Export Citation:
Assignee:
FOSTER ELECTRIC CO LTD (JP)
International Classes:
H04R7/16; H04R9/04
Domestic Patent References:
| WO2009063567A1 | 2009-05-22 |
Foreign References:
| KR100666154B1 | 2007-01-09 | |||
| JP2007110209A | 2007-04-26 |
Attorney, Agent or Firm:
MAEKAWA Naoki et al. (JP)
Download PDF: