Title:
SPEAKERPHONE
Document Type and Number:
WIPO Patent Application WO/2024/029066
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an inexpensive and lightweight speakerphone by specializing the structure as a speaker for output of a proximity alarm sound. As a solution, the present invention provides a speakerphone (100) comprising a vibration plate (10), a magnet (20) fixed to the vibration plate (10), an electromagnet (30) that vibrates the vibration plate (10) and the magnet (20), and an enclosure (40) accommodating the vibration plate (10), the magnet (20), and the electromagnet (30), characterized in that the electromagnet (30) includes: a coil (35) formed by winding a wire (34) around a bobbin (33) having a tubular part (31) and a flange (32); and a yoke (36), and the enclosure (40) is formed from a magnetic material and has formed therein a tube-entering part which enters the interior space of the tubular part (31) and which functions as the yoke (36).
Inventors:
TSUCHIYA TOMOHIRO (JP)
Application Number:
PCT/JP2022/030077
Publication Date:
February 08, 2024
Filing Date:
August 05, 2022
Export Citation:
Assignee:
MARUKO KEIHOKI KK (JP)
International Classes:
G10K9/13; H04R13/00
Foreign References:
| CN201248131Y | 2009-05-27 | |||
| CN103281658A | 2013-09-04 | |||
| JP2008167247A | 2008-07-17 | |||
| JPH0227896A | 1990-01-30 | |||
| JP2012119845A | 2012-06-21 |
Attorney, Agent or Firm:
WATANUKI PATENT SERVICE BUREAU (JP)
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