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DESCRIPTION JPH05328488

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DESCRIPTION JPH05328488
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
method of manufacturing a dome-shaped speaker used for various acoustic devices.
[0002]
2. Description of the Related Art A conventional method of manufacturing a dome-shaped
speaker will be described with reference to the drawings.
[0003]
A conventional manufacturing method will be described using FIGS. 2 (a) and 2 (b).
First, as shown in FIG. 2A, the dome-shaped diaphragm 1 and the voice coil 2 are bonded and
dried while being placed in the jig 3. Next, as shown in FIG. 2 (b), in the magnetic air gap 9 of the
field portion, which comprises the dried dome-shaped diaphragm 1 and the voice coil 2, the
upper plate 4, the magnet 5, the lower plate 6 and the tweeter ring 7. The voice coil 2 is mounted
so as to be fitted without being eccentric and fixed by the baffle plate 10.
[0004]
The operation of the dome-shaped speaker configured as described above will be described
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1
below.
[0005]
When an input voltage is applied to the voice coil 2 in the magnetic gap 9, a driving force is
generated to vibrate the dome-shaped diaphragm 1 to generate a sound.
[0006]
SUMMARY OF THE INVENTION However, the above-described structure has the following
problems.
That is, in order to mount the assembled product of the dome-shaped diaphragm 1 and the voice
coil 2 in such a manner that the voice coil 2 fits into the magnetic gap 9 of the field section
comprising the upper plate 4, the magnet 5, the lower plate 6 and the tweeter ring 7. An
eccentricity or inclination of the voice coil 2 occurs in the magnetic gap 9 of the field portion due
to a defect in adhesion between the dome-shaped diaphragm 1 and the voice coil 2 and an
inclination of the voice coil 2, resulting in malfunction. .
[0007]
The present invention solves the above-described conventional problems, and provides a method
of manufacturing a dome-shaped speaker with improved assembly accuracy and improved
quality performance.
[0008]
[Means for Solving the Problems] In order to solve this problem, in the method of manufacturing
a dome-shaped speaker according to the present invention, a dome-shaped diaphragm, a voice
coil and a frame are bonded together using a jig, The frame is bonded to the inner periphery of
the plate.
[0009]
According to this method, eccentricity and inclination of the voice coil in the magnetic gap are
eliminated, and a dome-shaped speaker with improved assembly accuracy and improved quality
performance is realized.
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2
[0010]
An embodiment of the present invention will be described below with reference to the drawings.
[0011]
FIGS. 1A and 1B show a method of manufacturing a dome-shaped speaker according to an
embodiment of the present invention.
First, as shown in FIG. 1 (a), the voice coil 12 is bonded to the rising portion of the dome portion
of the dome-shaped diaphragm 11 with an adhesive 17 and made of an iron plate, and the upper
step of the frame 18 having two steps The peripheral portion of the dome-shaped diaphragm 11
is adhered to the portion, and the voice coil 12 and the outer peripheral cylindrical portion 18a
of the frame 18 are dried while being placed in a jig 13 having a projecting portion 13a for
controlling the inner peripheral cylindrical portion 18a.
At this time, the projection 13a functions so that the distance between the voice coil 12 and the
frame 18 can be kept constant.
[0012]
Next, the dried assembly of the dome-shaped diaphragm 11, the voice coil 12, and the frame 18
is combined with the field portion including the upper plate 14, the magnet 15, and the lower
plate 16.
That is, the inner peripheral cylindrical portion 18 a of the frame 18 is press-fit and coupled to
the inner peripheral portion of the upper plate 14 forming the magnetic gap 19, and the
peripheral portion of the dome-shaped diaphragm 11 coupled to the frame 18 by the baffle plate
20 is Fix so as to press to complete a dome-shaped speaker.
[0013]
The operation of the dome-shaped speaker configured as described above will be described
below.
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3
[0014]
When an input voltage is applied to the voice coil 12 in the magnetic gap 19, a driving force is
generated to vibrate the dome-shaped diaphragm 11 to generate a sound.
Since the distance between the voice coil 12 and the frame 18 is kept constant, malfunction of
the voice coil 12 due to tilting or eccentricity does not occur.
[0015]
As described above, since the present invention is manufactured, the following effects can be
obtained.
[0016]
A jig that keeps the distance between the voice coil and the frame constant, adheres and dries the
dome-shaped diaphragm, voice coil, and frame, and the top plate of the magnetic gap of the field
section consisting of the top plate, magnet, and bottom plate Since the frame is joined to the
inner peripheral portion, it is possible to realize an excellent dome-shaped speaker which does
not cause a malfunction of adhesion, malfunction of voice coil due to inclination or eccentricity.
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