Voice coil assembly, loudspeaker using the same, and method for producing the same

A speaker and voice coil technology, applied in the field of voice coil components, can solve the problems of increasing the overall weight of the speaker diaphragm and reducing the production efficiency of the speaker, and achieve the effects of reducing vibration, reducing weight, and increasing the rigidity of the skeleton

Inactive Publication Date: 2009-07-01
ONKYO KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This increases the overall weight of the speaker diaph

Method used

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  • Voice coil assembly, loudspeaker using the same, and method for producing the same
  • Voice coil assembly, loudspeaker using the same, and method for producing the same
  • Voice coil assembly, loudspeaker using the same, and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0052] Figure 1A and 1B is a view showing a flat speaker 1 according to a preferred embodiment of the present invention. Figure 1A is a perspective view of the loudspeaker 1 showing the flat diaphragm 6 facing upwards, and Figure 1B is a cross-sectional view along the line A-A' showing the internal structure of the flat speaker 1 . These figures do not show parts of the internal structure and the like which are not necessary for the description of the present invention.

[0053] The flat and thin speaker 1 of the present embodiment is a flat and thin speaker with a speaker vibrating part 5, which includes a generally rectangular flat diaphragm 6, wherein the width W (about 16.2mm) of the flat diaphragm 6 and the overall height h of the speaker ( approximately 20.0 mm) is relatively small compared to the length L (approximately 140.8 mm) of the flat diaphragm 6 . Specifically, the speaker 1 further includes a speaker magnetic circuit 2 , a support frame 3 fixed to the bo...

Embodiment approach 2

[0068] Figure 4A and 4B is a view showing the voice coil assembly 30 of the flat speaker 1 according to another embodiment of the present invention. Figure 4A is a plan view of the voice coil assembly 30, and Figure 4B is a perspective view showing the entire voice coil assembly 30 . The voice coil assembly 30 includes a lattice bobbin 31 having a lattice cross section defining 14 rectangular spaces 31a therein, and 14 inner rectangular coils 9 each fixed to an inner wall surface 31b defining the rectangular spaces 31a. The voice coil assembly 30 of this embodiment can replace the voice coil assembly 10 of the previous embodiment to provide a flat and thin speaker 1 . Accordingly, elements similar to those of the previous embodiment, such as the magnetic circuit 2 and the loudspeaker vibrating part 5 including the flat diaphragm 6, are indicated by like reference numerals and will not be described further below.

[0069] The lattice frame 31 is obtained by injection-mol...

Embodiment approach 3

[0075] Figure 5A and 5B is a view showing the magnetic circuit 20 used in the speaker 1 according to another preferred embodiment of the present invention. Figure 5A is a perspective view of the magnetic circuit module 2m showing the magnetic circuit 20, and Figure 5B is a perspective view showing the magnetic circuit 20 . Figure 5A and 5B The magnetic circuit 2 shown in includes six magnetic circuit modules 2m connected together. Particularly, Figure 5A and 5BThe magnetic circuit 20 includes three magnetic circuit modules 2a and three magnetic circuit modules 2b alternately along a single row (the magnetization direction of which is opposite to that of the magnetic circuit modules 2a) such that adjacent magnets have different polarities.

[0076] Each magnetic circuit module 2m includes a generally rectangular flat plate 23, a main magnet 22 fixed to the bottom surface of the plate 23, a yoke fixed to the bottom surface of the main magnet 22, and a repulsion magnet...

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Abstract

A voice coil assembly capable of realizing a flat thin loudspeaker having a high efficiency, reduced divided vibrations, a flat frequency response, and reduced operation defects. The voice coil assembly includes a plurality of internal-winding voice coils, each including a rectangular bobbin having a rectangular cross section and defining a rectangular space therein and an internal rectangular coil fixed to an inner wall surface of the rectangular bobbin defining the rectangular space, wherein an outer wall surface of the rectangular bobbin of one internal-winding voice coil is adhered and fixed to an outer wall surface of the rectangular bobbin of another internal-winding voice coil.

Description

technical field [0001] The present invention relates to a loudspeaker including a magnetic circuit using a plurality of magnets and a voice coil assembly using a bobbin and a coil. More specifically, the present invention relates to flat, thin loudspeakers with a small overall height. Background technique [0002] Some electrodynamic speakers for converting audio signals into sound use a flat diaphragm to achieve a speaker with a small overall height including a magnetic circuit. With a flat diaphragm, the overall height of the speaker will be smaller compared to a cone diaphragm, but the speaker may have insufficient stiffness to vibrate as a unit without having separate vibrations. Thus, loudspeakers of the conventional type include a bobbin secured to a flat diaphragm and comprising a plurality of voice coils driving the flat diaphragm in an attempt to dampen separate vibrations. Another conventional type of loudspeaker is a flat thin loudspeaker with a small overall he...

Claims

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Application Information

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IPC IPC(8): H04R9/04H04R9/06H04R31/00
Inventor 定家弘一云浩靖丰嶋吉英长冈聪史氏本义则阿部宏一
Owner ONKYO KK
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