JPS58129900A - Flat diaphragm for speaker - Google Patents

Abstract

PURPOSE:To attain ease of manufacture, by using a spiral ribbon member as a core and sticking a skin member in which radial ribs are continuously provided on the surface of the core member. CONSTITUTION:The ribbon member made of a light metal foil such as aluminum foil or a resin film having a ridigity is wound in spiral to form the core member 4. On the upper and lower surfaces of the core member 4, skin members 5, 6 made of a light metal such as aluminum or a resin film and in which radial ribs 7 are continuously provided on the entire surface are pasted with bonding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flat speaker diaphragm constituting a flat speaker.

As shown in Figure 1, a conventional flat diaphragm for speakers is made by cutting light metal foil such as aluminum into strips, gluing them partially at regular intervals, and stretching them.
It was constructed by bonding sheet-like skin materials 2.3 such as light metal foil or synthetic resin film to the upper and lower surfaces of a honeycomb core 1 in which a large number of square spaces were continuously formed.

In this way, in the conventional flat plate diaphragm for speakers, many short pieces are glued together to produce the honeycomb core 1.
2,
? , - is required, resulting in poor productivity and a significant disadvantage in terms of cost.

The present invention eliminates the conventional drawbacks as described above, and aims to provide a flat plate diaphragm for a speaker that is easy to manufacture and inexpensive. , a single ribbon material formed into a spiral shape is used as the core, and a radial lip (skin material that is continuously provided on the cold surface) is attached to the surface of this core material. That is.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 8.

1. In the embodiment shown in FIGS. 2 to 4, 4 is a core material made of a ribbon material made of light metal foil such as aluminum foil or a rigid resin film wound in a spiral shape. On the upper and lower surfaces of the material 4, skin materials 5 and 8 made of light metal foil such as aluminum or resin film and having radial lips 7 continuously provided over the entire surface are pasted by adhesive.

The reason why the ribs 7 in the radial direction of the skin materials 6, 6 are provided is as follows.
This is because the strength in the concentric direction is small and sufficient performance cannot be achieved if only the flat skin material is attached to the spiral core material 4, so the strength in the concentric direction is increased by the ribs 7.

Note that the core material 4 can also be constructed using a corrugated ribbon material as shown in FIG. 5, or a structure in which two ribbon materials are wound in a spiral shape as shown in FIG. You can also.

In addition, the skin material 5.6 can be configured so that the ribs 7 in the radial direction are shaped like a triangular pyramid as shown in FIG. 7, or the ribs 7 can be configured to have a slightly curved shape as shown in FIG. .

Such a flat diaphragm for a speaker can be manufactured by forming a ribbon material into a spiral shape using an automatic machine to form a core material 4, and then bonding skin materials 6, 6 to this core material 4 with an adhesive. can.

As the flat diaphragm for a speaker according to the present invention is constructed as described above, it has advantages such as easy manufacture and mass production, as well as high rigidity as a flat diaphragm for a speaker. It is of great value.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a conventional flat diaphragm for speakers, FIG. 2 is a perspective view showing an embodiment of the flat diaphragm for speakers of the present invention, FIG. 3 is an exploded perspective view of the same, and FIG. A top view with one skin material removed, FIGS. 6 and 6 are top views of the core material of another embodiment, and FIGS. 7 and 8 are perspective views of the skin material of another embodiment. It is. 4...core material, s, 6...--skin material, 7...rib〇 Name of agent Patent attorney Toshio Nakao and 1 other person 1st
Figure 2 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] A flat diaphragm for a speaker that is constructed by pasting skin material in which radial lips are continuously formed over the entire surface on the top and bottom surfaces of a core material made of a spirally wound ribbon material.