JPS614400A - Edge for speaker diaphragm - Google Patents

Abstract

PURPOSE:To obtain large amplitude without enlarging the width of edges by bonding edges of down roll form, up roll form and corrugated form on the outer periphery of a square diaphragm, and bonding the outer periphery of the edges to a frame. CONSTITUTION:Material different from material used in the side of outer peripheral edges is used in four parts shown by oblique lines at corners of outer peripheral edges 2 of the square diaphragm 1. As an example, A-A' section of the down roll form edge is shown. The side of the down roll is the same in form in section of any part; and in corner parts, the nearer to the corner, the larger the radius of the roll is obtained. However, all sections show circular arcuate form both in side parts and corner parts. That is, roll forms of two sides are butted at corner parts where materials are different. By constituting edges using material excellent in elasticity, large amplitude can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a speaker applied to general audio equipment.

Conventional configuration and problems thereof A conventional speaker is shown in FIG. In Fig. 1, in a speaker in which an edge 2 formed of a single material is adhered to the outer periphery of a rectangular diaphragm 1, and this is further adhered to a frame 3, the entire circumference of the edge is The tension is not uniform between the bending angle part and the side part, and only the four corners of the edge shown with diagonal lines in Figure 2 are stretched first, and this diagonal part The elasticity of the diaphragm limits the amplitude of the diaphragm, which is a factor that limits input resistance.

Purpose of the Invention An object of the present invention is to be able to obtain a larger amplitude than the conventional edge thrust without changing the edge width of a speaker having a rectangular diaphragm. The objective is to provide a speaker that improves this point of view.

Structure of the Invention The present invention has been improved by changing the conventional method in which the edges bonded to the outer periphery of the rectangular diaphragm are molded from a single material, to the corner portions of the edges that tend to protrude quickly, that is, the shaded areas 4 in the figure. It is characterized by using a different material that has better elasticity than the material for the other parts of the edges, which correspond to the edges. As a result, when an input signal is large enough to cause the shaded portion of a conventional edge made of a single material to bulge, this edge does not bulge, but rather the sides other than the shaded portion bulge first. As shown above, when this edge is used, it is possible to obtain a much larger amplitude than the conventional one without increasing the width of the edge, thereby improving the input resistance characteristics.

DESCRIPTION OF THE EMBODIMENTS In the embodiment of the present invention, the four shaded corners of the outer edge of the rectangular diaphragm shown in FIG. 2 are made of a material different from that used for the sides of the outer edge. , - as an example, down-rolled edge' o %
@□□□Yo, No. . , seven. Figure 3 shows the □-□・U surface.The shape of this down roll is that the side portions have exactly the same shape no matter where you take the cross section, and the corner portions have the same shape as they get closer to the corner. Although the radius of the roll is large, the cross sections of both the sides and corners are all arcuate. The corner portions made of different materials also have a shape in which the roll shapes of the two sides are butted against each other. Here, to explain the bonding state of two different materials, Figures 4 and 5
As shown in the figure, Figure 5 is an exploded version of the configuration shown in Figure 4. Part A is the side part, and if a material with poor elasticity, such as cloth, is used, , the part B and the corner part are made of a material with excellent elasticity, such as maltbrene.

It is made of a material such as urethane, and the two materials are glued together using the C part as an adhesive margin. In this way, instead of forming the edge using only a single material, by constructing the edge using a material with excellent elasticity in the part that protrudes first around the entire circumference of the edge, it is possible to form the edge using a single material. Compared to the edge amplitude, it is possible to obtain an even larger amplitude.

Effects of the Invention In the speaker of the present invention, in order to increase the amount of vibration of the diaphragm, the width of the edges is made thicker, and this does not cause deterioration of characteristics. This has the effect of making it difficult to bend the edges, that is, to make the edges less likely to stick, thereby improving the input resistance characteristics.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a general speaker with a rectangular diaphragm, FIG. 2 is a plan view of a speaker according to an embodiment of the present invention, FIG. 3 is a sectional view taken along the line A-AI of the edge in FIG. 5 are an enlarged plan view and an enlarged exploded plan view of the same speaker. 1 diaphragm, 2... edge, 3 river... frame. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st floor
Figure 7Figure 2Figure 3

Claims (2)

[Claims] (1) A speaker diaphragm edge constructed by bonding down-roll, up-roll, and wave-shaped edges to the outer periphery of a rectangular diaphragm, and bonding the outer periphery of these edges to a frame. (2) Instead of using a single material as the material for the edges of the rectangle,
Two types of materials with different elasticity are used, and the material with excellent elasticity is used only in the four corners of the square edge.
A diaphragm for a speaker according to claim 1, which is constructed by using a different material for the side portions of the other rectangular edges, and bonding the different corner and side portions of the edge material. edge.