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1 Name of the Invention 4 Agent 〒 671 Address Kadoma City Ogata Kamonshin 1006, Osaka
Prefecture [Contact Telephone (Tokyo) 453 to 3111 Patent Office] [Phase] Japan Patent Office ■
Japanese Patent Application Publication No. (1976) 3.26 ■ Japanese Patent Application No. 4 '?
-10 ワ 07 / agency number Medaka β 1 1 page specification 1, title of the invention 1, title of
the invention voice coil
Voice coil name (582) Representative of Matsushita Electric Industrial Co., Ltd. Masaharu
a1 Detailed Description of the Invention The present invention relates to a voice coil. The
conventional voice coil is a housing in which a conducting wire 2 is wound around the outer
periphery of the bobbin 1 as shown by way of example to the first factor. However, this type of
voice coil is soft and very easily deformed because the bobbin 1 is generally made of paper, and
therefore, it is likely to cause excessive toughness and lower it to the high frequency limit
frequency-'of the skiy 1 or force. The present invention solves the above-mentioned first problem
and is characterized in that the bobbin is formed of a fiber which becomes rigid such as carbon
fiber or holon fiber. Hereinafter, an embodiment of the present invention will be described with
reference to FIGS. The fan 2 shown in FIG. 2 is a voice coil formed by winding 4 green 4 from the
end of a bobbin 3 formed by winding holon fibers in a solenoid shape and solidifying with epoxy
resin. What is shown in FIG. 3 is a voice coil formed by winding a boron fiber in a solenoid shape
and solidifying with epoxy Q fat and winding it around 4 綜 4a'ft around the outer periphery of a
bobbin 3a. ・パ・・。 ・、、、7 、・□、 \1. ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Long chile cut boro effect l · · · · · · · ·. Fibers are aligned to form a
cylindrical □, and a conductor 1J4b is wound around the outer periphery of a bobbin sb formed
by solidifying with an epoxy resin to make a void. スコイルとしたものである。 '' '° ˜' & @ t '-sr>
", BU, N" 04'k (D lead concept. In addition, in the above example, the boron i is used as the
material for forming the bobbin 1 in the example of k. Should be a large fiber. As described
above, the voice coil according to the present invention is characterized in that the EndPage: 1S
bin is made of a flexible and rigid fiber such as a boron fiber secondary fiber, and the bobbin is
light. It is extremely useful because it is highly resistant to deformation, and can significantly
reduce voice coil defects caused by deformation of the bobbin that has conventionally occurred
during handling.
4. Brief description of the drawings Fig. 1 is a side view of a partial cross section showing a
conventional voice coil, & E2 to 2 are a portion 1fr of a voice coil showing an embodiment of the
present invention. 4 is a side view of the partial cross-section of the voice coil showing the same
embodiment <a (a) and a plan view (b)). 3, 3a, 3b--------------------------------------------. Name of the
agent 9P Associate Seijio Shio and others 1 person Figure 2 Figure 3 Figure 4 Figure 6 Inventors
and agents other than the above (1) inventor (2) agent EndPage: 2