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Loudspeaker vibrating membrane

A technology of loudspeaker and vibrating membrane, applied in the field of loudspeaker vibrating membrane, can solve the problems such as the reduction of sound pressure and frequency, and achieve the effect of improving rigidity and maintaining sound quality

Inactive Publication Date: 2007-01-24
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes the problem of reducing the frequency of the sound pressure

Method used

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  • Loudspeaker vibrating membrane
  • Loudspeaker vibrating membrane
  • Loudspeaker vibrating membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First, refer to the following Figures 1A to 1D and figure 2 A loudspeaker diaphragm (hereinafter simply referred to as "diaphragm") according to Embodiment 1 of the present invention will be described. Figures 1A to 1D is an illustration showing the structure of a speaker using the diaphragm according to Embodiment 1. figure 2 is a graph showing the sound pressure-frequency characteristics of the speaker using the diaphragm according to Embodiment 1.

[0039] Figure 1A is a cross-sectional view of the speaker. exist Figure 1A In this example, the loudspeaker includes a first magnet 101 , a second magnet 102 , a voice coil 103 , a diaphragm 104 , a first casing 105 , a second casing 106 , a first yoke 109 , and a second yoke 110 . The first housing 105 is provided with a first air hole 107 . The second yoke 110 is configured with a second air hole 108 . Although not shown, the loudspeaker has the shape of a rectangular planar hexahedron having a rectangular ...

Embodiment 2

[0058] Referring now to Figures 7A to 7C and Figure 8 A diaphragm according to Embodiment 2 of the present invention will be described. 7A to 7C are illustrations showing a vibrating film according to Embodiment 2. FIG. Figure 8 is an illustration showing the vibration mode of the vibrating membrane according to Embodiment 2. Like Embodiment 1, the diaphragm according to Embodiment 2 is used for connection to a speaker, although not shown. Furthermore, in Embodiment 2, the same elements as in Embodiment 1 are given the same reference numerals.

[0059] FIG. 7A is a top plan view of a diaphragm according to Embodiment 2. FIG. As described in FIG. 7A, the vibrating membrane 301 is shaped so as to extend in the longitudinal direction in FIG. 7A. That is, like the vibrating film 104 , the vibrating film 301 has an outer shape in which the length in the longitudinal direction and the length in the horizontal direction are not equal.

[0060] The difference between the vibrat...

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PUM

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Abstract

A loudspeaker diaphragm (104) affixed with a coil (103) includes an edge portion located outside of a portion affixed with the coil (103) and a center portion located inside of the portion affixed with the coil (103). The center portion is provided thereon with ribs (202). With these ribs (202), the height of the center portion can be limited to the height of the ribs (202). Therefore, it is possible to save a space of a loudspeaker where the loudspeaker diaphragm is placed, thereby slimming down the loudspeaker. Furthermore, with these ribs, the rigidity of the center portion can be improved without using a conventional solution of forming, for example, a dome shape on the center portion.

Description

technical field [0001] This invention relates to loudspeaker diaphragms, and more particularly to loudspeaker diaphragms for use in loudspeakers, it being desirable to reduce the thickness of the diaphragm. Background technique [0002] In recent years, electronic devices such as cellular phones and PDAs (Personal Digital Assistants) have become smaller and equipped with larger display screens, while also being expected to produce high-quality sound. Accordingly, speakers incorporated in such electronic devices are similarly expected to become thinner and smaller while also producing high-quality sound. In order to realize this desire, rectangular or elliptical elongated speakers have been proposed. [0003] Figure 12A and 12B is an illustration showing the structure of a conventional slim speaker. Figure 12A is a top view of a conventional slim loudspeaker, while Figure 12B is its front view. exist Figure 12A and 12B , the elongated speaker includes a magnet 901, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R7/12
CPCH04R7/14H04R9/06H04R7/12
Inventor 薄木佐和子佐伯周二
Owner PANASONIC CORP