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JPH0287900

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DESCRIPTION JPH0287900
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker diaphragm used for a speaker used in various audio devices. 2. Related Art In recent
years, in the pursuit of high input resistance and high sound quality of speakers, not only
diaphragms mainly made of pulp materials but also speaker diaphragms mainly made of carbon
and resin have been used for speaker diaphragms. Speakers used have been increasing.
Hereinafter, a conventional resin diaphragm that can be manufactured by injection molding will
be described. FIG. 3 shows a cross-sectional view of a conventional resin diaphragm, and FIG. 4
shows a detailed cross-sectional view thereof. In FIGS. 3 and 4, reference numeral 4 denotes a
resin diaphragm formed by injection molding, and 6 denotes a conductive and solderable metal
eyelet which is coupled to the middle portion of the resin diaphragm 4. 6 is a tinsel wire, the tip
of which is inserted into the metal eyelet 6 and connected by solder or the like. SUMMARY OF
THE INVENTION However, in the above-described conventional configuration, when the resin
diaphragm 4 vibrates as a speaker, the tinsel wire 6 causes a large swing phenomenon with the
metal eyelet 6 as a fulcrum (see FIG. Is the fulcrum. 2.) For each of the life tests in the reliability
test for a speaker requiring high input, there is a disadvantage that the copper foil portion of the
tinsel wire 6 is broken. The present invention solves the above-mentioned conventional
problems, and when the diaphragm as a speaker vibrates, when the tinsel wire is picked up with
the diaphragm connection portion of the tinsel wire as a fulcrum, the copper foil portion of the
tinsel wire at the fulcrum It is an object of the present invention to provide a speaker diaphragm
without breakage of the speaker. Means for Solving the Problems In order to achieve this object,
the imaging plate for a speaker of the present invention simultaneously molds a part of the tinsel
wire at the time of injection molding, and It has a suitable length 1 and a construction covered
with injection molding resin. Operation With this configuration, when the diaphragm vibrates as
a speaker, the swing phenomenon of the tinsel wire can be controlled, and the copper foil of the
11-05-2019
1
tinsel wire in each life test in the reliability test is required for the speaker requiring high input
resistance. Thus, it is possible to provide a speaker diaphragm which does not cause damage to
the part of. Embodiment An embodiment of the present invention will be described with
reference to the drawings. FIG. 1 is a speaker diaphragm formed of a thermoplastic or
thermosetting resin which can be manufactured by injection molding in an embodiment of the
present invention, and a detailed view thereof is shown in FIG. In FIG. 2, 1 is a resin diaphragm
formed by injection molding a thermoplastic or thermosetting resin, 2 is a tinsel wire molded
simultaneously with injection molding, and the tinsel wire 2 is formed on the back side of the
resin diaphragm 1 It is the structure covered by the injection molding resin 3 from the mold part
to appropriate length l.
The operation of the speaker diaphragm configured as described above will be described below.
First, when the speaker vibrates, a shake phenomenon occurs with the connecting portion of the
tinsel wire 2 with the resin diaphragm 1 as a fulcrum, but the resin imaging plate 1 which can be
manufactured by injection molding the tinsel wire 2 is simultaneously molded. The take-off
phenomenon of the tinsel wire 2 can be controlled by covering a suitable length from the mold
portion on the back surface side of the tinsel wire 2 with the injection molding resin 3 and
controlling the copper foil of the tinsel wire 2 It is possible to prevent the breakage of the part.
As described above, according to the present invention, a part of the tinsel cord is molded at the
time of injection molding using a thermoplastic or thermosetting resin that can be manufactured
by injection molding to form a resin diaphragm, and furthermore, the tinsel cord By covering the
molded part on the back side of the diaphragm with an injection molding resin to an appropriate
length from the molded part on the back side, it is necessary for the speaker to require high
input resistance in each life test in the reliability test. It is possible to realize a loudspeaker
diaphragm that can be manufactured by excellent injection molding without causing breakage in
parts.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a cross-sectional view of a speaker diaphragm according to an embodiment of the
present invention, FIG. 2 is a detailed cross-sectional view thereof, FIG. 3 is a cross-sectional view
of a conventional speaker diaphragm, and FIG. FIG.
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2
1... Resin diaphragm, 2. Name of agent Attorney Attorney Shigetaka Takano Other 1 person
Figure 1 Figure 2
11-05-2019
3
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