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JPS5619995

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DESCRIPTION JPS5619995
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a conventional magnetically
shielded speaker, and FIG. 1 is a block diagram of the magnetically shielded speaker of the
present invention. 1 is a projection, 2 is a hole, 3 and 7 is a center pole, 4 and 8 are frames, 5 is a
magnet, 6 is a plate, 9 is a gap, 10 is a voice coil, and 11 is a diaphragm.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a
magnetic shield type speaker. Heretofore, as shown in FIG. 1, the porcelain circuit assembly of
the magnetic shield type speaker has been positioned with a jig so that the center of the bottom
of the center pole 7 is positioned at the center of the bottom of the frame 8 and attached with an
adhesive. The annular magnet 5 is adhered with an adhesive on the disk-like portion of the
center pole 7, and the annular plate 6 is adhered with an adhesive thereon to form a magnetic
circuit and a frame for magnetic leakage of the ceramic circuit It was prevented by eight. A
magnetic gap 9 is formed between the cylindrical tip portion side surface of the center pole 7
and the side surface of the inner hole of the plate 6. Outside of the diaphragm 11 /? ? Attach the
outer-2 circumference end to the outer periphery of the frame 8, place the voice coil 10 in the
center and place the voice coil 10 in the center of the magnetic gap 9 . Therefore, attaching the
bottom of the center pole 7 to the center of the bottom of the frame 8 requires precision and
accuracy, making the pasting operation difficult, turbid, and time-consuming. The present
invention has been devised to eliminate the above-mentioned drawbacks. If you ask the
embodiment shown in the drawings, as shown in FIG. 2, a projection 1 is provided at the center
of the lower surface of the center pole 3 and at the center of the bottom surface of the frame 4. A
hole 2 is provided, a protrusion 1 is inserted into the hole 2, and an adhesive is used for sticking,
requiring a positioning jig. The annular magnet 5 is attached with an adhesive on the disk-like
portion of the center pole 3, and the annular plate 6 is attached with an adhesive on the annular
magnet 5 to form a magnetic circuit, thereby causing porcelain leakage of the magnetic circuit. It
is preventing with frame 4. A magnetic gap 9 is formed between the cylindrical tip portion side
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surface of the center pole 3 and the side surface of the inner hole of the plate 6. The outer edge
of the diaphragm 113 is attached to the outer circumference of the frame 4 and the voice coil 10
is suspended at the center I correction section, and the voice coil 10 is held at the center of the
small magnetic gap 9 It is a speaker. Since the present invention is structured as described above,
no jig is required to attach the lower surface of the center pole 3 to the bottom of the frame 4,
and the attaching operation is easy and very efficient and in a short time It is an effective device
on T work that can be When spot welding the projections 1 and the holes 2, it is not necessary to
use an adhesive between the bottom of the frame 4 and the lower surface of the center pole 3 to
make the assembly of the magnetic circuit easier and increase the efficiency. Is
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