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JPS58157293

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DESCRIPTION JPS58157293
[0001]
The present invention relates to an inexpensive and high-performance loudspeaker diaphragm.
Conventionally, as shown in FIG. 1, the speaker diaphragm uses the arrows 3 for the portion of
the diaphragm 1 and the portion of the edge 20 and the outer peripheral fixing portion, and
these are manufactured with different materials and they are assembled. The board assembly
was attached to the speaker. In addition, a so-called fixed edge manufactured by collectively
using an edge made of paper made of the same material as the diaphragm and the diaphragm is
used in part. The former has the advantage of being able to use different materials appropriately
in the right place, but it has the disadvantage of high cost due to the large number of processing
steps. Although the latter is inexpensive, its properties are changed by environmental conditions
because its edge is paper, and there is a disadvantage that fatigue deterioration is large. The
present invention is made to eliminate the above-mentioned conventional defects, and it is
possible to manufacture an inexpensive diaphragm by injection molding integrally the diaphragm
part, the edge part, and the peripheral fixed part using a thermoplastic resin. It is an object of the
present invention to provide a speaker diaphragm in which high performance can be obtained by
making it possible to adjust the compliance required for the edge portion by adjusting the
thickness or partially cutting it. Hereinafter, an embodiment of a speaker diaphragm of the
present invention will be described based on the drawings. FIG. 2 is a cross-sectional view
showing the structure of one embodiment. In FIG. 2, the diaphragm portion 11, the edge portion
12 and the arrow portion 13 are integrally formed by injection molding of a thermoplastic resin,
and the edge portion 12 is larger than the diaphragm portion 11 in order to increase the
compliance. It is thin. By the way, in general, the peripheral frame (the fixing portion to the
illustrated custom character is required to have a high rigidity and a beautifully beautiful
treatment, and for some high-grade products, rubber molded products etc. are used for this
purpose. Be The present invention makes it possible to form the gasket part together with the
11-05-2019
1
gasket part. For example, as shown in FIG. 3 (plan view), the edge part 12 is partially cut away as
shown in FIG. 3 (plan view). The diaphragm portion 11 is supported by 12a. In addition, as
shown in FIG. 4, it is possible to secure a thick-walled tap whose outer periphery sufficiently
supplies the resin to the squat portion 14 in the above-mentioned notch portion 0 Thus, the
maximum thickness of the diaphragm portion 11 If the outer periphery is finished to a thickness
of 2 times or more than that of the above, and Shira I is processed, it is possible to obtain a more
luxurious feeling. Furthermore, the method of assembly is also significantly simplified by taking
the form of forming a projection (not shown) on the back of the gasket and fitting it to the frame.
In addition, in addition to the edge portion of the molding resin, the fatigue deterioration of the
edge portion considered to be a problem is made by adding a double structure including an
airtight edge such as rubber or cloth having air permeability. It is possible to solve.
As described above, according to the speaker diaphragm of the present invention, the
thermoplastic resin is used as a raw material, and the diaphragm portion, the edge portion, and
the frame fixing portion at the edge periphery are integrally formed by injection molding. So it
can be cheap and high performance 0
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a cross sectional view of a conventional speaker diaphragm, FIG. 2 is a cross sectional
view showing one embodiment of the speaker diaphragm of the present invention, and FIG. 3 is a
second embodiment of the speaker diaphragm of the present invention FIG. 4 is a cross-sectional
view of an edge portion in a third embodiment of the speaker diaphragm of the present
invention.
11: Diaphragm, 12: Edge, 12a: Residual edge, 13: Arrow, 14: Gasket, where the same reference
numerals denote the same or corresponding parts. Show. Agent Shino Nono-Fig. 1
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