JPH07101952B2 - Speaker unit diaphragm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a diaphragm of a speaker unit which is formed by depositing a metal material on the surface of a predetermined mold.

[Conventional technology]

FIG. 8 is a process diagram showing a method of manufacturing a diaphragm of a speaker unit made by welding, vapor deposition or chemical deposition of metal material. In the figure, (a) is a deposition process by welding or vapor deposition of metal material. , (B) is a releasing step of peeling the diaphragm from the mold, (C) is a trimming step of cutting the diaphragm to a required size, and (1) in the figure is a diaphragm.
(2) is a die for forming the adherend, and (5) is a trimming die.

By the way, the performance required for the diaphragm is that it is light first and secondly that it has a high rigidity. The lightness has a large effect on the conversion efficiency of the speaker, that is, the efficiency. Greatly affects.

[Problems to be Solved by the Invention]

For the above reasons, the thickness of the diaphragm has conventionally been increased in order to increase its rigidity. However, there is a problem in that the thicker the wall, the heavier it becomes.

An object of the present invention is to obtain a diaphragm that is lightweight, has high rigidity, and has good frequency characteristics.

[Means for Solving the Problems]

In the case of the present invention, the diaphragm is provided with the thick-walled reinforcing portion only in a specific portion extending from the central portion to the peripheral portion thereof, so that the rigidity of the diaphragm is increased while suppressing the increase of the weight as a whole. I have to.

[Action]

In the diaphragm of the present invention, the rigidity as a whole is increased without adding much weight due to the presence of the thick reinforcing portion in the central portion transferred from the predetermined mold.

〔Example〕

An embodiment of the present invention will be described below. That is, in FIG. 1, (2) is a predetermined die prepared for forming the diaphragm (1), and (3) is a groove radially provided from the center of the top surface to the peripheral portion of the die. is there.

Therefore, on the back surface of the diaphragm (1) formed as shown in FIG. 2 by welding or depositing metal material such as metal beryllium or boron on the surface of the mold (2), the center of Portion to peripheral portion (1a)
Are simultaneously molded by transfer from the mold (2).

FIG. 3 shows another embodiment of the die used for forming the diaphragm of the present invention, in which the groove is not only radial but also
A circumferential groove is also combined with this.

FIG. 4 shows another embodiment in which the above groove is formed in a star shape.
Further, FIG. 5 shows another embodiment in which a plurality of elliptical grooves are combined in an intersecting state.

Although the groove (3) in each of the above-mentioned embodiments has a concave shape, it may be a ridge (4) as in the other embodiments of FIGS. 6 and 7. Although the diaphragm is dome-shaped in the above embodiment, it may be cone-shaped as in the other embodiments of FIG.

FIG. 9 is a cross-sectional view showing an example of a rib as a thick-walled reinforcing portion. According to the present invention, such a rib can be easily integrally formed with the diaphragm.

Further, FIG. 10 is a comparison diagram of the frequency characteristic when the diaphragm having the rib as described above is used and the frequency characteristic when the diaphragm having no rib is used. As can be seen from this figure, when the diaphragm having ribs of the present invention is used, the reproducible frequency band extends to a high range, and the frequency characteristic is obviously improved.

〔The invention's effect〕

As described above, the diaphragm of the speaker unit of the present invention is formed from the central portion to the peripheral portion in forming the adherend by welding, vapor deposition or chemical deposition of a metal material such as metal beryllium on a predetermined die surface. It was obtained by integrally forming a thick-walled reinforced part extending over the surface of the diaphragm and releasing it from the surface of the mold. The thick-walled reinforced portion is formed integrally with the molding at the same time, which makes it possible to directly and extremely easily manufacture a diaphragm that is relatively lightweight and has high rigidity as a whole and good frequency characteristics. There is.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a die for producing a diaphragm of the present invention, and FIG. 2 is a vertical view of the die and the diaphragm showing a state where the diaphragm is attached to the die. Sectional view, Figure 3, Figure 4
FIG. 5, FIG. 6, FIG. 6 and FIG. 7 are perspective views showing another embodiment of the mold used in the present invention, and FIG. 8 (a) (b).
(C) is a partial cross-sectional view showing a conventional diaphragm manufacturing process, FIG. 9 is a cross-sectional view of a portion having a rib as a thick-walled reinforcing portion of the present invention, and FIG. It is a comparison diagram of a frequency characteristic and a frequency characteristic when a diaphragm having no ribs is used. In the figure, (1) is the diaphragm, (1a) is the thick-walled reinforcement, (2)
Is a mold.

Claims (1)

[Claims] 1. When forming an adherend to be molded by welding, vapor deposition or chemical deposition of a metal material such as metal beryllium on a predetermined die surface, a thick reinforcing portion extending from the central portion to the peripheral portion is integrally formed. , A speaker unit diaphragm obtained by releasing this adherend from the mold surface.