JP2003052099A - Speaker diaphragm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker diaphragm having increased rigidity and internal loss in which sound quality is enhanced and appearance is improved by reducing the weight. SOLUTION: The speaker diaphragm 1 is provided, on the surface thereof, with protruding faces 2, protruding and recessed faces 3 or protruding faces 4 having a diameter of 870 nm or less, an interval of 1600 nm or less, and a depth of 1600 nm or less.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker device (H04R7 / 14).

[0002]

2. Description of the Related Art Generally, a speaker diaphragm is optimally hard, light and non-resonant. Therefore, paying attention to the material of the diaphragm, most of the materials are thin and lightweight, by increasing the Young's modulus and internal loss by mixing various things with paper and using a resin with similar physical properties, the shape is also flat. There are many shapes. Some of them have an uneven surface whose cross-sectional shape is continuous in the circumferential direction and in the peripheral direction from the top in order to avoid resonance due to the shape. In addition, there are some objects that intentionally carve regular grooves on the surface of the resin to emphasize the luster.

Conventionally, as a speaker diaphragm provided with this diaphragm, there is one disclosed in, for example, Japanese Patent Laid-Open No. 6-225385. FIG. 6 shows this Japanese Patent Laid-Open No. 6-22538.
5 is a cross-sectional view of the speaker diaphragm of the embodiment described in Japanese Patent Publication No.

[0004]

However, in the general flat plate shape as described above, the Young's modulus and the internal loss depend only on the material characteristics of the vibration plate, and since it is a flat plate shape, a clean split resonance occurs depending on the shape. It was easy.

Further, the vibrating plate formed of continuous irregularities is not effective for reproduction in the middle and low frequency ranges because the bellows-like element largely vibrates and vibrates. The present invention provides a diaphragm that is rigid, lightweight, has a large internal loss, and has a good appearance.

[0006]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a convex surface having a diameter of 870 nm or less, an interval of 1600 nm or less, and a depth of 1600 nm or less on the surface of a speaker diaphragm. A speaker diaphragm having an uneven surface or a concave surface.

As described above, according to the first aspect of the invention, not only the rigidity of the diaphragm can be increased by providing the fine uneven surface on the portion required for the strength of the diaphragm, but also the unevenness is much higher than the material resonance frequency. Resonance is hard to occur because it is small, and internal loss is improved and resonance is suppressed. Furthermore, it is possible to reduce the amount of material and reduce the weight by providing a large number of concave surfaces on the surface where strength is unnecessary. In addition, since the surface area of the diaphragm is also increased in total, the amount of air discharged from the diaphragm is increased, and a louder sound can be produced.

In order to solve the above problems, the second invention is
The speaker diaphragm is characterized in that the speaker diaphragm is made of a transparent resin, has an uneven surface adapted to the wavelength of light, and is coated with a coating having a high reflectance on the uneven surface. .

As described above, according to the second aspect of the present invention, the transparent resin vibrating plate is provided with the fine concavo-convex surface corresponding to the wavelength of light, and the coating having a high reflection efficiency is deposited on the concavo-convex surface. In addition, it is possible to obtain a light diffusion phenomenon and an interference phenomenon depending on the joining direction, and it is also possible to obtain an effect that the surface shines in rainbow colors.

It is known that the wavelengths of light are 400 to 700 nm, and in general, they are emphasized at an odd multiple of ½ wavelength at the groove pitch and ¼ wavelength at the groove depth. It is well known that patterns of various shapes can be made to stand out by intentionally creating the shape of the unevenness to match this.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

(First Embodiment) FIG. 1 is a block diagram of a speaker diaphragm according to a first embodiment of the present invention, and FIG. 2 is a front oblique view showing a speaker apparatus using the diaphragm of FIG. FIG. 3 is a diagram showing acoustic characteristics using the diaphragm of FIG.

Referring to FIG. 1, a speaker diaphragm 1 according to the present invention.
On the surface of, the shape is 870 nm in diameter and the spacing is 1600 n
The speaker diaphragm is characterized in that a convex surface 2, a concave-convex surface 3 or a concave surface 4 having a depth of m and a depth of 1600 nm is provided. In this embodiment, the vibrating plate has a mortar shape, and the thickness of the substrate 5 is a colored PP having a thickness of 0.6 mm.

As shown in FIG. 2, in this embodiment, since the back surface of the speaker diaphragm is provided with irregularities, it is devised so that the irregularities cannot be confirmed from the front view of the diaphragm and the design is not impaired. Further, as shown in FIG. 3, as compared with a conventional flat diaphragm, the rigidity of the diaphragm can be changed by intentionally arranging the concavities and convexities, so that the resonance generated in the diaphragm can be suppressed and is lighter. It can be seen that the sound pressure can be increased by configuring a hard speaker diaphragm.

(Second Embodiment) FIG. 4 shows the structure of a speaker diaphragm according to a second embodiment of the present invention. 4, the speaker diaphragm 6 of the present invention is characterized in that it is formed of a transparent resin, the concave surface 7 is arranged in the circumferential direction, and the coating material 8 having a high reflectance is deposited on the concave surface 7 by vapor deposition. It is a speaker diaphragm.

In the embodiment, the vibrating plate is flat, the thickness of the substrate 9 is 0.3 mm polycarbonate, the concave shape is 200 nm in diameter, the concave pitch is 600 nm, the concave width interval is 400 nm, and the depth is 1600 nm. Is. This makes it possible to construct a diaphragm that is light and hard and shines in a rainbow color like a CD.

Of course, the concave surface in the example can be emphasized or blurred by adjusting the height of the desired wavelength of light on the convex surface or the uneven surface. It is a well-known fact that the pattern is floated by providing a certain streak according to.

Furthermore, the gloss is given priority and the sound quality is sacrificed.
A diaphragm with design priority can also be configured. FIG. 5 is a front oblique view showing a speaker device using the diaphragm of FIG.

[0019]

As described above, according to the present invention, it is possible to provide a speaker diaphragm that is light, hard, and has no resonance, and also to provide a speaker diaphragm that can intentionally form a pattern. .

[Brief description of drawings]

FIG. 1 is a rear perspective view of a speaker diaphragm according to a first embodiment of the present invention.

FIG. 2 is a front perspective view of the speaker device according to the first embodiment of the present invention.

FIG. 3 is an acoustic characteristic diagram according to the first embodiment of the present invention.

FIG. 4 is a rear perspective view of the speaker diaphragm according to the second embodiment of the present invention.

FIG. 5 is a front perspective view of the speaker device according to the second embodiment of the present invention.

FIG. 6 is a sectional view of a speaker diaphragm according to a conventional example.

[Explanation of symbols]

1 speaker diaphragm 2 convex 3 uneven surface 4 concave 5 substrates 6 speaker diaphragm 7 concave 8 paint 9 substrates 10 Speaker device 20 speaker device 30 Edge

Claims (2)

[Claims] 1. The surface of the speaker diaphragm has a diameter of 8 mm.
70 nm or less, spacing is 1600 nm or less, depth is 16
A speaker diaphragm having a convex surface, a concave-convex surface, or a concave surface of 00 nm or less. 2. The speaker diaphragm is formed of a transparent resin, is provided with an uneven surface corresponding to the wavelength of light, and is formed by vapor-depositing a paint having a high reflectance on the uneven surface. Speaker diaphragm.