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JPS62239798

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DESCRIPTION JPS62239798
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
method of manufacturing a low leakage magnetic speaker used for various audio devices and
video devices. (Conventional art) In the past, when manufacturing a low leakage magnetic
speaker, when the cancel magnet was adhered to the back surface of the lower plate, the cancel
magnet was dislocated from the lower plate to be eccentric or eccentric because it was
performed visually. In order to prevent this, a step of temporarily fixing with an adhesive tape or
the like was necessary. (Problems to be Solved by the Invention) The present invention is to solve
the above problems. (Means for Solving the Problems) In order to solve the above problems,
according to the present invention, the cancel magnet and the lower plate are provided by a jig
provided with a convex portion to be fitted into the center guide hole (recessed portion) of the
lower plate. In addition to adhesion so as not to be eccentric, it is the fact that the jig that cures
the adhesive is used as a jig that serves as a gauge to prevent slippage. (Function) In this way, the
center of the lower plate and the center of the cancel magnet can be bonded without eccentricity,
and a gap can be prevented between the curing of the adhesive. (Embodiment) The figure is a
sectional view of one embodiment showing the configuration of the present invention, and shows
a structural sectional view of a speaker and a sectional view of a jig. In the figure, 1 is a center
pole, 2 is a lower plate, 3 is a main magnet, 4 is an upper plate, 5 is a cancel magnet, 6 is a jig, 7
is a frame, 8 is a gasket, 9 is a cone paper, 10 is a magnetic gap , 11 is a voice coil, 12 is a
damper, and 13 is a dust cap. The present invention uses the center guide hole provided in the
lower plate 2 and the jig 6 for holding the center of the cancel magnet 5 on the back surface of
the lower plate 2. A manufacturing method of a low leakage magnetic speaker in which the
cancel magnet 5 is bonded without eccentricity is provided. (Effects of the Invention) As
described above, according to the present invention, the eccentricity of the cancel magnet 5 in
the bonding step of the cancel magnet 5 is eliminated, and the reduction of the bonding area of
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the lower plate 2 and the cancel magnet 5 due to the bonding deviation is also Therefore, the
quality and appearance quality can be improved, and its industrial value is great.
[0002]
Brief description of the drawings
[0003]
The drawing is a cross-sectional view of one embodiment showing the configuration of the
present invention, and shows a structural cross-sectional view of a speaker and a cross-sectional
view of a jig.
1 ・ ・ ・ center pole, 2 ・ ・ ・ lower plate. 3 · · · Main magnet, 4 · · · Top plate, 5 · · · Cancel
magnet, 6 · · · Jig, 7 · · · Frame · 8 · · · Gasket, 9 · · · cone paper, 10 · · · Magnetic gap, 11: voice coil,
12: damper, 13: dust cap.
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