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Loudspeaker

A loudspeaker and frame technology, which is applied in the field of loudspeakers, can solve the problems of poor reproduction sound quality and abnormal sound, and achieve the effect of preventing sudden straightening and stretching sound

Inactive Publication Date: 2003-11-05
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] When the large driving current of low frequency acts on the voice coil 10, the edge 9 is straightened, and the edge 9 produces an abnormal sound, resulting in the obvious deterioration of the quality of the reproduced sound

Method used

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Examples

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Embodiment Construction

[0044] (1st case)

[0045] Figure 1A is a sectional view corresponding to the speaker of the first example of the present invention, Figure 1B for Figure 1A A magnified cross-sectional view of the edge of the loudspeaker and its surrounding structure.

[0046] For simplicity, the previous combination Figure 9A Parts recurring in this and subsequent examples referred to in the description of FIG. 9B have the same reference numerals.

[0047] exist Figure 1A and Figure 1B Among them, the central pole 2, the magnet 3 and the top plate 4 form a ring magnetic circuit at the lower end of the ring frame 1.

[0048] An annular gap 5 is formed between the upper outer peripheral surface of the center pole 2 and the inner peripheral surface of the top plate 4, and the voice coil support 6 is installed in the gap 5 so as to freely vibrate in the vertical direction. The voice coil 10 is wound on the outer peripheral surface of the lower end of the voice coil support 6 . The di...

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PUM

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Abstract

A loudspeaker comprising: a vibrating membrane; a frame for accommodating the vibrating membrane; an edge connected to the outer edge of the vibrating membrane and the inner edge of the frame to keep the vibrating membrane in the frame, wherein the thickness of the edge is between the vibrating membrane and the inner edge of the frame The middle part between the frames and its vicinity is the thinnest, and its thickness increases toward the direction of the diaphragm and the frame; and the edge is formed into a sandwich structure with a dense surface layer and a porous interior; the edge is formed so that its foam The magnification is low in the surface layer and increases toward the inside.

Description

field of invention [0001] The present invention relates to a loudspeaker capable of reproducing input audio signals of a large amplitude with an edge having excellent characteristics. Background technique [0002] In recent years, people have developed small sound reproduction devices suitable for home stereo systems and personal computers without taking up a large space. Speakers used in such small-sized sound reproduction devices generally have a small-diameter diaphragm (hereinafter referred to as diaphragm diameter). [0003] Figure 9A is a cross-sectional view of a typical structure of an ordinary loudspeaker with a small diaphragm diameter. Figure 9B is Figure 9A Enlarged cross-sectional view of middle edge 9 and its surrounding structures. exist Figure 9A Among them, the central pole 2, the magnet 3 and the top plate 4 form a ring magnetic circuit at the lower end of the ring frame 1. [0004] High-density magnetic flux is formed in the annular gap 5 between the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R7/18H04R7/20
CPCH04R7/20H04R2307/207
Inventor 岩佐干郎武轮弘行佐藤和荣长谷川满裕
Owner PANASONIC CORP