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DESCRIPTION JPS5611591

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DESCRIPTION JPS5611591
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a conventional speaker, FIG.
2 is a plan view of a conventional frame, and FIGS. 3 and 4 are a sectional view and a plan view
of a frame of the present invention. 1 is a reinforcing rib, 2 is a yoke, 3 is a pole piece, 4 is a
magnet, 5 is a pole holder, 6 is a magnetic gap, 7 is a frame, 8 is a top surface, 9 is a projection,
10 is a ceiling, 11 is a diaphragm , 12 is a voice coil, 13 is a damper.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the reinforcement
of the top of a frame used in speakers. Conventionally, as shown in FIGS. 1 and 2, in the speaker,
a central hole is formed on the upper surface of the yoke 2 bent in a letter shape, and a magnetic
circuit is formed by the yoke 2, the pole piece 3 and the magnet 4 The holder 5 secures the
positions of the pole piece 3 and the magnet 4 and forms the magnetic gap 6. A plurality of
welding projections 9 and ceiling holes 10 are formed on the top surface 8 of the frame 7 formed
in a frusto-conical shape, and the top surface 8 of the frame 7 and the upper surface of the yoke
2 are welded. Diaphragm / 15-where the peripheral part is stuck to the frame 7 The voice coil 12
is centrally held by the damper 11 and is located at the center of the magnetic gap 6. In recent
years, the yokes and magnets that make up the magnetic circuit have become large as the output
of the speaker has increased, and the weight has increased. Therefore, the components that make
up the magnetic circuit when the speaker is subjected to a baffle #iK drop test When the frame
70 is mounted on the human face portion 8 and the magnetic gear knob 6 of the magnetic circuit
is not positioned, the voice coil 12 is slipped on the inner wall of the magnetic gear tube hole of
the pole piece 3 or yoke 2 to cause a defect. there were. The present invention has been devised
to eliminate the above-mentioned defects. If the embodiment shown on one side is described, it
can be seen from FIG. 1 and FIG. It is a speaker field frame in which reinforcing ribs 1 in the
normal direction of a plurality of places projected above the top surface portion 8 which is an
adhesive surface are formed. When the speaker is assembled as shown in FIG. 1 using this
speaker frame, the top surface portion 8 of the frame 73 to which the components constituting
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the magnetic circuit are attached is reinforced. The voice coil 12 is positioned at the center of the
magnetic gap 6 and does not cause a gear knob defect because the top surface 8 does not swell
even when tested and the magnetic gap 6 of the magnetic circuit is not displaced. . Uninvented,
as described above, to reinforce by forming a sleeve cloth rib in the upper surface of the frame
inward · From K, it is a device to prevent the occurrence of defective gear knob at the time of
drop test Widely applied)).
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