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JPS56165488

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DESCRIPTION JPS56165488
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional flat
plate speaker, and FIG. 3 is a cross-sectional view of the flat plate speaker of the present
invention. 1 is a diaphragm, 2 is a honeycomb core 13 is a surface material, 4 is an annular
groove, 5 is an aluminum cap, 6 is an adhesive, and 7 is a voice coil.
[Detailed description of the invention] With an id-/-nick core of the present invention as a central
core, a Al-type cap is firmly attached to the lower surface of a sandwich V-shaped flat diaphragm
with a surface material. The present invention relates to a flat plate speaker in which a voice coil
bobbin is attached to a handout to increase input resistance. Conventionally, as shown in FIG. 1,
the center pole 12, the magnet 13 and the plate 14 constitute a magnetic circuit, and the center
pole 12 and the plate 14 form a magnetic gap of 1 '2 The voice coil 7 is attached to the center of
the magnetic gap, and the voice coil 7 is held in the center by a damper 16 which adheres the
outer peripheral edge to the inner bottom of the frame 15. The upper end of the bobbin of the
voice coil 7 is attached to the lower surface of the diaphragm 8 that adheres the surface material
of the fibrous material directly to the flat plate formed of a sheet of fibrous material and the nick
core. The outer edge of the edge 11 of the cross-sectional circular arc ring is attached to the
outer edge of the frame 11 and the outer edge of the edge 11 is attached to the outer edge of the
frame 15. In this case, since the surface material of the diaphragm 8 is pressed and bent in the
movement direction of the voice coil bobbin, the surface material surface is wrinkled and weak,
or the surface material and the voice coil bobbin are separated depending on the movement
direction. There is a drawback that the adhesion is weakened because the force moves and the
adhesion area is small. For this purpose, as shown in FIG. 2, the hat-shaped aluminum cap 10 is
inserted into and attached to the central hole of the flat / nicam diaphragm 9, and the bobbin
upper end of the voice coil 7 is adhered to the outer peripheral lower surface of the aluminum
cap 10. The In this case, although the adhesion between the pregnancy plate 93 and the
aluminum cap 10 is strengthened, the hollow portion of the aluminum cap... If the thickness of
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the aluminum cap 10 is increased in order to give the aluminum cap 10 the same rigidity as that
of a part of the 2 nick core, the weight increases and the weight becomes one! There is a
drawback that the features of the large nicks diaphragm are lost. The present invention was
devised to eliminate the above-mentioned drawbacks. If the embodiment 1 shown in the drawing
is described as shown in FIG. Conventional l! Same as / 1. Heat-cho 塑囲 synthetic resin Tetsu維
alone or a natural pulp # mouse and mounds on the lower surface of the diaphragm 1 to Nursing
surface material 3 Tomeha of Mtl SL material on both sides of the formed tabular .. Nikamukoa -2
mixed paper of The lower heating mold is pressed and melted to form the annular groove 4.
The adhesive 6 is poured into the annular groove 4, the outer peripheral end of the dish-like
aluminum cap 5 is inserted, and the adhesive 6 is applied to the adhesive portion again to fill the
groove 4 with the adhesive 6. The upper end of the bobbin of the voice coil 7 is attached to the
lower surface of the aluminum 4 cap 5, the inner peripheral edge of the edge 11 of the circular
arc shape in cross section is attached to the outer peripheral edge of the moving plate 1, and the
outer peripheral edge of the edge 11 is edged It is a flat speaker attached to the outer peripheral
edge of the l /-lens 15. Since the present invention is configured as described above, the strength
of the bonding portion between the diaphragm 1 and the aluminum cap 5 and between the
aluminum cap 5 and the bobbin upper end of the voice coil 7 can be dramatically increased. Aldo
yassop is in contact with the upper end of the coil bobbin 3Q. As it has been observed, the heat
radiation effect of Joule heat from the voice coil is increased to increase the human resistance of
the speaker.
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