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JPS62257299

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DESCRIPTION JPS62257299
[0001]
The present invention relates to a method of assembling a voice coil bobbin for a speaker.
<Overview> The present invention uses a shape memory alloy as the material of the voice coil
bobbin, and before the voice coil bobbin is assembled with other speaker parts, the shape is
memorized into a shape having a ridge and then the shape without a ridge is once formed. Then,
when assembled with the speaker component of the above-mentioned function, the voice coil
bobbinn is returned to the shape having the above-mentioned memorized ridge so that the air
gap portion of the speaker has a size which does not deteriorate the speaker performance. It is
something to try. <Prior Art> Generally, in a loudspeaker, one end is connected to the diaphragm
2 as shown in FIG. A flange portion 1 'extending outward in diameter is provided at the other end
of the voice coil bobbin 1 inserted into the air gear rough portion 7 of the magnetic circuit
consisting of 6 and the voice coil bobbin 1 reciprocates along with the reproduction operation of
the speaker. The air in the air-gear tube 7 is caused to flow by the flange 1 'to air-cool the air
gap. <Problems to be solved by the present invention> However, in the above-mentioned
conventional speaker, the voice coil bobbin 1 is provided with the flange 1 'at the flange before
the assembly, and the flange 1' is air geared at one assembly. In order to insert the 7th portion 7,
it is necessary to increase the size of the air gap portion 7. Therefore, there is a fear that the
magnetic flux density is lowered and the performance of the speaker is deteriorated. <Means for
Solving the Problems> The present invention has been invented in view of the problems of the
above-mentioned conventional speaker, and the diameter of the end of the end opposite to the
side to be connected to the diaphragm is outward In the method of assembling a voice coil
bobbin for a speaker, the air gap portion is air-cooled by moving air at the above-mentioned hook
portion during speaker reproduction operation, in which the voice coil bobbin has a shape with
the hook portion. Then, the voice coil bobbin is deformed into a shape without a collar, and is
then inserted into the air gap portion and assembled, and the voice coil bobbin is returned to the
13-05-2019
1
upper memorized shape in this assembled state It is an object of the present invention to provide
a method of assembling a speaker voice coil bobbin. <Operation> Therefore, according to the
present invention, at the time of assembling the speaker, the voice coil bobbin has a shape
without a ridge and the air gap portion is inserted, so that the size of the air gap portion can be
reduced. It can be enhanced to improve the performance of the speaker.
An embodiment of the present invention will now be described in detail with reference to the
attached drawings. FIG. 1 is a cross-sectional view of a speaker including a voice coil assembled
with other parts by the assembling method according to the present invention, in which 11 is a
voice coil bobbin made of shape memory alloy wound with voice aile 12; The upper end portion
is coupled to the diaphragm 13 and the lower end portion is vertically moved) 14.15 The air gap
portion 18 in the magnetic circuit formed by the center ball 16 and the magnet 17 is inserted
through the air gap portion 18 The inserted lower end peripheral edge is provided with a flange
portion 11 'extending outward in diameter. 19 is a frame fixed on the upper plate 14, and the
diaphragm 13 is supported via its edge portion 13'. 20 is a damper. Although the speaker
according to the present invention is configured as described above, the voice coil bobbin 11 is
made of a shape memory alloy as described above, and before being assembled with the other
speaker component, First, the shape is stored in a shape having a ridge portion 11 'as shown in
FIG. Then, as shown in FIG. 3, the voice coil bobbin 11 is temporarily deformed into the shape
without the collar portion 11 'and inserted into the gear tube portion 18 at the top, and
thereafter, there is the collar portion 11'. The assembly is completed by returning to the original
shape. In the speaker including the voice coil bobbin assembled as described above, as the voice
coil bobbin 11 reciprocates, the flange portion 11 'causes a flow of air into the air gear tub
portion 18 to air-cool the air gap portion 18. <Effects> Since the present invention assembles the
voice coil bobbin as described above, the size of the air gap portion can be set large, and the
magnetic flux density can be increased to improve the performance of the speaker.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a cross-sectional view of a speaker including a voice coil bobbin assembled by the
method according to the present invention, second agent patent attorney Atsushi Sugiyama =
(one other person) FIG.
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