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JPS5366225

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DESCRIPTION JPS5366225
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of the main part of a
conventional electrodynamic acoustic transducer, and FIG. 2 is a cross-sectional view of the main
part of an electrodynamic acoustic transducer according to an embodiment of the present
invention. FIG. 3 is a top view of the main part, and FIG. 4 is a top view of the main part of
another embodiment. '4 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · sticking surface.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrodynamic
acoustic transducer (in which, when a vibrating membrane is placed on the surface to which the
vibrating membrane is attached, the adhesive is used between the pasting surface and the
vibrating membrane as quickly as possible. The objective of the present invention is to provide a
conventional example, in which the vibrating membrane 1 is placed on the vibrating membrane
pasting surface 2 and the side walls of the vibrating membrane pasting surface 2 The adhesive is
poured from the gap 3 between the drain 1-1-2 and the outer periphery of the vibrating
membrane 1 1. However, the adhesive portion is because the sticking portion 1 a of the vibrating
membrane 1 and the vibrating membrane pasted surface 2 are both flat surfaces. There was an
uneven finish << to the inflow. The present invention is intended to eliminate such a defect, and
one embodiment will be described below with reference to FIGS. 2 and 3. Reference numerals 1
and 4 denote vibrating films, 6 denotes a vibrating film sticking surface, 6 is a voice coil, 7 is a
magnetic yoke integrally formed with the vibrating film sticking surface, and 8 is a magnet. In
this case, as shown in FIGS. 2 and 3, the surface of the vibrating membrane pasting surface 50 is
roughened to provide a small gap between the vibrating membrane 4 and the pasting portion 4d.
When the adhesive flows from the gap 9 between the side wall 5 and the outer periphery of the
vibrating membrane 1, it becomes possible to spread the adhesive quickly and uniformly on the
vibrating membrane pasting surface. Also, in the embodiment shown in FIGS. 2 and 3, the surface
of the surface 5 of the vibrating diaphragm period l) is made to have a satin-like shape, or FIG. 4:
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as shown in FIG. The mesh 3 (arranged in can obtain the same effect, As apparent from the above
embodiments, according to the present invention, since the surface to which the vibrating
membrane is to be attached is provided with a large number of irregularities, the adhesive can be
easily distributed uniformly, and the sticking accuracy can be improved. The pasting work of the
vibrating membrane becomes easy, and the workability can be improved.
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