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Electroacoustic transducer

An electro-acoustic transducer and housing technology, which is applied to frequency/directional characteristic devices, transducer housings/cabinets/supports, sensors, etc., can solve the problem of large diaphragm amplitude, inability to fully absorb back pressure, and inability to ensure sound pressure. And other issues

Inactive Publication Date: 2004-09-01
STAR MICRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in this case, since the vibration amplitude of the diaphragm is also large, if the space on the rear side is small, the back pressure cannot be sufficiently absorbed, and thus there is a problem that the required sound pressure cannot be ensured.

Method used

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  • Electroacoustic transducer
  • Electroacoustic transducer
  • Electroacoustic transducer

Examples

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Embodiment Construction

[0035] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0036] figure 1 It is a side sectional view showing a state in which an electroacoustic transducer device 10 according to an embodiment of the present invention is arranged facing upward, figure 2 and image 3 Its top and bottom views.

[0037] As shown in these drawings, in the electroacoustic transducer device 10 of this embodiment, the electroacoustic transducer 12 is accommodated inside the casing 14 and used in a state of being mounted on a mobile phone or the like.

[0038] The above-mentioned electro-acoustic transducer 12 is an electro-acoustic transducer with an outer diameter of about 10-20mm, which includes a diaphragm 22, a bracket 24 supporting the outer peripheral portion of the diaphragm 22; a voice coil 26 whose front end is fixed on the diaphragm 22 ; the magnetic circuit unit 28 formed with a cylindrical magnetic gap for accommodating the rea...

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PUM

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Abstract

To secure required sound pressure when an electroacoustic transducer is used as a speaker on securing sufficient sound quality even when the electroacoustic transducer is used by both the speaker and a receiver in an electroacoustic transducer device. An internal space of a housing for housing the electroacoustic transducer is partitioned into a front side space and a rear side space with a diaphragm as a boundary, and the rear side space is partitioned into a first space facing rear sound emitting holes and a second space other than the first space. Sound emitted from front sound emitting holes is used as sound of the speaker, and sound emitted from the rear sound emitting holes is used as sound of the receiver. In such a case, the volume of the front side space and the first space is made small to secure sufficient sound quality as a speaker and a receiver due to the resonance effect of the spaces. Meanwhile, the volume of the second space is made sufficient large to sufficiently absorb backpressure even though the amplitude of the diaphragm becomes large, securing required sound pressure.

Description

technical field [0001] The present invention relates to an electroacoustic transducer device in which an electroacoustic transducer is accommodated inside a housing. Background technique [0002] In general, a portable communication device such as a mobile phone is provided with an electroacoustic transducer such as a call receiver and an incoming call notification speaker. [0003] At this time, Patent Document 1 describes an electroacoustic transducer device that uses a case of a portable communication device as a case for accommodating an electroacoustic transducer. [0004] In the electroacoustic transducer device described in this patent document 1, the internal space of the casing is divided into a front side space and a rear side space with the diaphragm of the electroacoustic transducer as a boundary, and on the front wall and the rear side wall of the casing, A front sound emitting hole and a rear sound emitting hole are provided respectively to communicate the fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/02H04R1/34H04R9/00
Inventor 出野胜也漆畑潔
Owner STAR MICRONICS