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JPS55150579

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DESCRIPTION JPS55150579
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional side view of a speaker using a
conventional honeycomb diaphragm, FIG. 2 is an enlarged plan view of the periphery of a
through hole of an air vent hole formed in a no-Nicumm diaphragm, FIG. FIGS. 3 and 4 show an
embodiment of the present invention, and FIGS. 3a and 3b are a plan view of an air flow
adjustment bush made of a material such as plastic and a line b-b. FIG. 4 is a cross-sectional view
showing the cross-section in the direction of the arrow in FIG. 1 ииииии Honeycomb diaphragm, 2 иии и
и и Dust cap, 3 и и и и и и и и и и и и и и Voice coil, 5 и и и и и и и и и и и и и и и и и и и и и и ....... In the drawings, the same
reference numerals denote the same or corresponding parts.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a honeycomb diaphragm for a speaker. A conventional speaker using a honeycomb diaphragm
has been shown in FIG. In the figure, ill is a honeycomb diaphragm, (2I is a dust cap, (3) is an
edge, (4) is a voice coil, 151 tf carrier, (ill is a frame, (7) is a magnetic circuit portion). Several
through holes (8) were opened in the honeycomb diaphragm for air removal in the lower part of
the dust cap. FIG. 2 is an enlarged view around the through hole (8). [2, honeycomb diaphragm is
a three-layer structure, as shown in the figure, the holes on the front and back skins in the
correct shape (1)) ";" Has a hexagonal shape, and drilling a hole K causes the cell to be broken to
form a complex shape in which several hexagons are connected, and moreover, the area of the
hole in the skin is larger than that of the hole. A skinning state where support for the cell is lost
occurs, which also causes an abnormal sound. This invention is intended to eliminate the abovementioned drawbacks, and for the purpose of reducing turbulence in the air flow by inserting a
molded bushing of plastic or the like into a hole formed in a honeycomb diaphragm There is.
Hereinafter, an embodiment of the present invention will be described with reference to the
drawings. In FIG. 3, (9) is a bushing inserted into a through hole (6) drilled in the first and second
diaphragms, and (91) is a hole at the center of the bushing. FIG. 4 is a cross-sectional view
showing the mounting state of the bushing (9). As a result, the holes in the honeycomb
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diaphragm do not have a rapid change in cross-sectional area over the entire thickness. In Fig. 3,
the bush (9) has a cylindrical hole (91), but it can be expected to be more effective by changing
the cross-sectional area of both ends in correspondence with the unit. . As described above,
according to the invention of 1, since the bush is inserted into the hole of the honeycomb
diaphragm, it is possible to suppress the squeal of the skin, and it is possible to eliminate the
generation of the abnormal sound due to it.
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