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Electroacoustic transducer

An electro-acoustic transducer and electrical connection technology, which is applied in the direction of sound-emitting devices, instruments, sensors, etc., can solve the problems of increasing number, increasing size, and complex structure, and achieves reducing number, preventing accidental disconnection, and simple structure Effect

Inactive Publication Date: 2003-10-15
FOSTER ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will inevitably increase the number of required components, complicate the structure and increase the overall size

Method used

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  • Electroacoustic transducer
  • Electroacoustic transducer
  • Electroacoustic transducer

Examples

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Effect test

no. 1 example

[0045] will now refer to Figures 1 to 7 A first embodiment of the present invention is described. will refer to Figures 1 to 4 Begin by discussing the structure of the electromagnetic type electroacoustic transducer according to the present embodiment. Such as figure 2 with 3 As shown, there are upper shell 1 and lower shell 3, in figure 2 An annular sound emitting port 5 is formed in the center of the top surface of the upper and middle housing 1 . The base 6 and the iron core 7 are mounted on the central part of the lower casing 3 in a fixed and integrated manner, and the iron core 7 is wound with a coil 9 . A magnet 11 is disposed around the coil 9 on the inner wall of the lower casing 3 . Such as image 3 As shown, the magnet 11 consists of four supporting parts 4 that protrude on the inner wall of the lower housing 3 (see image 3 ) supported on its outer perimeter. Such as figure 2 with 3 As shown, a stepped portion 13 in which a diaphragm 14 is provided ...

no. 2 example

[0060] A second embodiment of the present invention will be described below with reference to FIG. 8 . Although the coil terminal arranging portion is located on the back of the lower case 3 in the first embodiment, its position is not particularly limited to this position. In the second embodiment, an opening 3c is formed in one side wall of the lower case 3 exposing a pair of pads 29 and 31 of the lead frame 19a with the opening 3c therebetween.

no. 3 example

[0062] A third embodiment of the present invention will be described below with reference to FIG. 9 . In this embodiment, the sound emitting port 5 is formed in one side wall of the upper case 1, and the opening 3c is formed in one side wall of the lower case 3 where the exposed terminals 21 and 23 are exposed, and is also exposed on the same side wall. pads 29 and 31.

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Abstract

An electroacoustic transducer, which has a lead frame previously formed into a predetermined shape, an outer case formed integrally with the lead frame and a drive section including a coil arranged inside the outer case, comprises an opening formed in the outer case; lands formed by exposing a part of the lead frame through an outer surface of the outer case; and the coil having coil terminals led out of the outer case through the opening and connected to the lands.

Description

technical field [0001] The present invention relates to an electro-acoustic transducer, and more particularly to such an electro-acoustic transducer, which has a casing integrally formed with a lead frame preformed into a predetermined shape, and the structure of the coil terminal configuration part is also improved, so as to reduce the The number of required parts, simplified structure, reduced size, and improved performance and assembly efficiency have contributed. Background technique [0002] The diversity of electroacoustic transducers includes different types of electroacoustic transducers of the electromagnetic type. exist Figure 11 with 12 is shown as the first prior art electro-acoustic transducer of electromagnetic type. There are upper shell 501 and lower shell 503, in Figure 11 A circular sound outlet 505 is formed in the center of the top surface of the upper housing 501 . A base 507 , a printed circuit board 509 and a coil 511 are housed in a fixedly integ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K9/12G10K9/13H04R13/00
CPCH04R13/00H04R1/06
Inventor 田岛和茂今堀能男
Owner FOSTER ELECTRIC CO LTD