JPS56142199

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DESCRIPTION JPS56142199
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional
speaker, and FIG. 2 is a cross-sectional view of the speaker of the present invention. 1.3 is a
diaphragm, 2 and 4 are edges, 5 is a pressure plate, and 6 is a frame.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker which is
disposed on the front of a driving flat diaphragm so as to widen the reproduction band near the
high frequency limit frequency, which is a conventional air transformer type. As shown in FIG. 1,
the magnetic circuit is composed of the center hole 7, the Macnet 8 and the plate 9, and the
frame 13 is attached to the upper surface of the 7 rate 9, the center pole 7, the plate 9 as shown
in FIG. The voice coil 14 (7) is placed at the center of the magnetic gap, and the yqz / "'P voice
coil 14 is suspended in the wedge conical diaphragm 16. The voice coil 14 is held in the center
by a damper 15 that sticks the outer peripheral edge to the inner bottom of the frame 13, and
the peripheral portion of the diaphragm 16 is adhered to the outer peripheral edge of the frame
13. A-up 17 had been stuck. The passive flat diaphragm 3 made of paper or aluminum is
disposed on the front surface of the diaphragm 16, the inner peripheral edge of the edge 4 is
attached to the peripheral portion of the diaphragm 3, and the outer peripheral edge of the edge
4 is on the outer peripheral edge of the frame 13. It was stuck on the upper surface of stuck
pressure plate 5. In this case, the vibration is transmitted to the passive planar diaphragm 3
through the compliance of the air chamber 18 surrounded by the diaphragm 16, the planar
diaphragm 3, the dustproof cap 17, and the holding plate 5 by the vibration of the driving
diaphragm 16. In order to eliminate distortions and sharp peaks near the high frequency range
limit frequency of the driving speaker but reduce the frequency band at high frequency range,
the present invention was devised to remove the above-mentioned defects. If the ceramic circuit
is the same as the conventional example as shown in FIG. 29, the frame 6 is attached to the
upper surface of the plate 9, and the center pole? , Form a magnetic gear knob with blade 9 @
Place the winding part of voice coil 10 at the center of @ Gigi nop, stick the upper end of voice
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coil 10 at the center of driving flat diaphragm l, and inner bottom of frame 6 The voice coil 10 is
held in the center by a damper 11 that sticks the outer edge to the outer edge, and the peripheral
portion of the diaphragm 1 is attached to the inner edge of the edge 2 and the outer edge of the
edge 2 is attached to the outer edge of the frame 6 The inner peripheral edge of the edge 4 is
attached to the periphery of the passive flat diaphragm 3 disposed on the front surface of the
diaphragm 1, and the holding plate 5 is inserted between the outer peripheral edge of the edge 4
and the outer peripheral edge of the edge 2 Since the speaker according to the present invention,
which is a speaker to be worn, has the above-described structure, the compliance of the air
chamber 12 surrounded by the diaphragms l, 3 and the edge 2.4 is transmitted by the vibration
of the drive diaphragm 1. Passive lower diaphragm 81C carrying It is transmitted.
Since the air chamber 12 is made smaller, the reproduction band near the high frequency band is
expanded-The diaphragm 3 of the embodiment of the present invention is made of paper or
aluminum, but the diaphragm 3 is When light materials such as paper and aluminum foil are
made of honeycomb core and skin materials such as paper and aluminum foil are stuck on both
sides, bending stiffness is about 1000 times that of paper of the same weight, aluminum It is
about several hundred times larger than a single plate, and the divided resonance frequency is
generated in a high frequency band higher than the use band. Therefore, there is an effect of
preventing generation of distorted sound in the use band 1'C. Is included in The present
invention includes a speaker system in which a driving speaker is attached to a speaker box, and
a passive flat diaphragm is attached to the front of the driving speaker and the opening of the
speaker box to have the same function.
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