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Sound amplifier

A technology of amplifiers and sound, applied in the direction of sound-generating devices, instruments, sensors, etc., can solve problems such as lack of speakers, and achieve the effect of easy sharing and easy music information

Inactive Publication Date: 2005-12-14
ELECOM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned playback devices or portable devices (hereinafter collectively referred to as "player devices") need to be small and lightweight, and most of them do not have speaker functions.

Method used

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Examples

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Embodiment 1

[0097] The sound amplifier 1 of embodiment 1 is made as Figure 1 to Figure 6 Shape. The main body member 11 is made of ABS resin, and is injection-molded to have a spiral partition 14 (about 2 mm in thickness) and an outer plate 15 (about 2 mm in thickness) located outside the partition 14 . The spiral shape, according to the above formulas 1 and 2, is a function curve when the expansion coefficient m is 2 and the angle range of the spiral shape is u=1-3.25. The material of the pair of cover members 12 and 13 is acrylic resin, which is injection molded into a substantially square plate shape. In addition, the headphone mounting parts 3 and 3 are made of ABS resin, the diameter of the sound hole is φ7mm, and injection molding is Figure 7 the shape shown.

[0098] A pair of cover members 12, 13 are sandwiched from both sides of the manufactured main body member 11, and after the mating portions of the main body member 11 and the mating portions of the cover members 12, 13 a...

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PUM

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Abstract

PROBLEM TO BE SOLVED: To provide a small-sized and lightweight loudspeaker with which a plurality of persons are capable of simultaneously listening to sounds generated from earphones, and which does not include any lead wire or connector. SOLUTION: The loudspeaker 1 includes an eddy-like sound conduction path 4 of which a spatial cross-sectional area becomes larger gradually from a starting terminal portion 4a and an ending terminal portion 4b, and earphone mounting portions 3 arranged oppositely at positions across the starting terminal portion 4a of the sound conduction path 4. The sound conduction path 4 is formed from a partition 14 which is formed like an eddy, and cover members 12, 13 holding the partition 14 from both sides, and each of the earphone mounting portions 3 is formed in shape of recess corresponding to an outer surface shape of an earphone to be mounted.

Description

technical field [0001] The present invention relates to a small-sized and light-weight sound amplifier without lead wires and connectors, and more particularly relates to a small-sized and light-weight sound amplifier capable of simultaneously listening to sounds produced by earphones by multiple people. Background technique [0002] In recent years, playback devices such as portable CD players, portable MD players, portable cassette tape players, and MP3 using flash memory are called portable audio players or portable players, and are obtained as portable information recording and playback devices. widely popularized. In addition, portable devices having a function of receiving music information or voice information, such as radios or the latest mobile phones, are also widely used. [0003] The above playback devices or portable devices (hereinafter collectively referred to as "player devices") need to be small and lightweight, and most of them do not have a speaker functi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/10G01K11/08G10K11/08G10K11/22H04R7/00H04R17/00
CPCG10K11/08H04R1/1008H04R1/2853H04R1/30H04R1/345
Inventor 石仓干泰高桥政彦
Owner ELECOM CO LTD
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