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Vibrating plate for speaker, dust cap for speaker, subcone for speaker, and speaker using them, and electronic equipment using the speaker

A technology of electronic equipment and loudspeakers, which is applied in the field of loudspeakers, can solve the problems of difficulty in improving material rigidity, large output, and high reliability, etc., so as to improve rigidity and longitudinal elastic modulus, realize large output, and high reliability effect

Active Publication Date: 2013-01-16
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to increase the rigidity of the material of the conventional paper diaphragm, paper dust cover, and paper auxiliary cone. Speakers using the diaphragm, dust cover, and auxiliary cone have a problem with high definition, which is one of high sound quality. Unfavorable problems of reproduction, large output, and high reliability

Method used

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  • Vibrating plate for speaker, dust cap for speaker, subcone for speaker, and speaker using them, and electronic equipment using the speaker
  • Vibrating plate for speaker, dust cap for speaker, subcone for speaker, and speaker using them, and electronic equipment using the speaker
  • Vibrating plate for speaker, dust cap for speaker, subcone for speaker, and speaker using them, and electronic equipment using the speaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0047]In this embodiment, paper is made from a material mainly made of plants, and a diaphragm for a speaker, a dust cover, and an auxiliary paper cone are configured.

[0048] FIG. 1 is a diagram showing a speaker diaphragm 27 (hereinafter simply referred to as diaphragm 27 ) in Embodiment 1 of the present invention. As shown in FIG. 1 , the vibrating plate 27 is formed by making paper containing a material that reduces the degree of beating of bamboo fibers obtained from bamboos older than one year to a microfibrillated state. FIG. 2 is a diagram showing a speaker dust cover 30 (hereinafter simply referred to as a dust cover 30 ) in Embodiment 1 of the present invention. As shown in FIG. 2 , a dust cover 30 is formed by making paper containing a material that reduces the degree of beating of bamboo fibers obtained from bamboos older than one year to a microfibrillated state. image 3 It is a cross-sectional view of the auxiliary cone 33 for speakers (hereinafter simply refer...

Embodiment approach 2

[0090] The vibrating plate and the dust cover of Embodiment 2 of the present invention use the main fiber obtained from bamboo fiber of 80wt% to 95wt% of the total fiber amount and the bamboo fiber that meets the A fiber of 5wt% to 20wt% of the total fiber amount, Made by papermaking.

[0091] In addition, the manufacturing process of the diaphragm and dust cover formed by this papermaking is the same as the method shown in FIG. 9 .

[0092] In addition, in the A fiber, 50% or more of the diameter of the branched feathered portion is 500 nm or less, more preferably 300 nm or less, and the volume occupancy of the branched feathered portion in the A fiber is preferably 20% or more.

[0093] A sizing agent, a paper strengthening agent, a waterproofing agent, a pigment, etc. are used as needed, and the sound quality is adjusted by adding 3% to 10% of polylactic acid and / or raw rubber, respectively.

[0094] Next, Examples and Comparative Examples will be described.

Embodiment 1

[0096] A vibrating plate and a dust cover containing 25 wt% of feathered bamboo fibers (fibers with A fibers formed from bamboo) with respect to 75 wt% of unbleached pulp obtained from coniferous trees (degree of beating: 650 ml) were produced. The speed of sound is 2100m / s and the internal loss is 0.035. Drainage is slightly worse at the time of manufacture.

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Abstract

The rigidity of a material for vibrating plates, dust caps, and subcones is improved to enhance sound quality as a speaker. To this end, paper containing a material prepared by reducing the beating degree of bamboo fibers obtained from bamboo of one or more years in bamboo age to a microfibrilated state, is prepared, and is used for the construction of a vibrating plate for a speaker, a dust cap,and a subcone. Further, paper containing at least 2% by weight of a fiber A prepared by accelerating feathering of the surface of the stem of fibers having a stem diameter of not more than 30 [mu]m to fuzz the stem surface to a branch form of not more than 1 [mu]m in diameter is used for the construction of a vibrating plate for a speaker and a dust cap.

Description

technical field [0001] The present invention relates to speaker diaphragms, speaker dust covers, and speaker auxiliary cones constituting speakers used in various audio equipment, and the use of these speaker diaphragms, speaker dust covers, and speaker auxiliary cones speakers, and electronic equipment using the speakers. Background technique [0002] In the recent audio industry and the automobile industry equipped with audio equipment, the sound quality reproduced from speakers has dramatically improved due to the spread of digital equipment. In these industries, the trend of loudspeakers is high sound quality, light weight, and environmental harmony. [0003] With regard to higher sound quality, in order to realize the sound quality demanded by users, the development of diaphragms, dust covers, and auxiliary cones, which are highly important speaker components that determine the sound quality, is both important and urgent. In the development of this diaphragm, research...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R7/02H04R31/00
Inventor 三村和义沟根信也阿式健市隅山昌英藤井透高桥良幸中村信夫清水俊宏佐藤均
Owner PANASONIC CORP