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Description 1, title of the invention
Electro-acoustic transducer
3. Detailed Description of the Invention The present invention relates to an improved electroacoustic transducer, in which the entire dome portion of the diaphragm almost serves as a
driving source and vibrates in the normal direction, and the directivity of sound is broad. Also, it
is possible to reproduce with high fidelity from the low tone range to the high tone range and to
obtain a clear sound quality with no noise and no delay of vibration due to inertia of the dome
part when the diaphragm is light <41. Vibration of a dome-shaped speaker in which a domeshaped diaphragm is joined to a conventionally known moving wire ring The directionality is
narrow because it vibrates in a fixed direction by the vibration of a moving sales wheel of a sales
dealer. It is impossible to faithfully reproduce from the low range to the high range, and the
dome part is slightly deformed at the displacement point of the vibration due to the inertia and
flexibility of the dome part itself, and the vibration of the movable coil is completely However,
the inventors of the present invention have obtained the present invention without such
drawbacks as a result of various experimental studies, although they have drawbacks such as
producing noise and not obtaining clear sound quality. A specific example of the present
invention will be described below with reference to the drawings. The central part and the
peripheral part of the dome-like parts 6b, 7b are magnetized to EndPage: 1 different pole, and a
plurality of through holes 6m, 7m are drilled between one pole. In the middle of nine pairs of
permanent magnet plates 6, 7, a diaphragm 5 having a dome ll5m in which spiral conductors
9m, 9b connected at the central portion on both sides in 9 are formed. The peripheral supporting
portion 5c of the outer edge of the outer peripheral edge 5b of the dome @ 5 is held and fixed by
the outer supporting portion 6c + 6c of the dome-like illsbt 7bf) of the permanent magnet plates
6 and 7 via the packing 1m + 8b. The diaphragm 5 is a film made of a synthetic resin such as
polyester, polyethylene, or polychloropyrene, both sides of the portion to be the dome portion 5
& or a spiral conductor 9m, 9b of copper, aluminum, etc. Wiring method, vacuum evaporation
method. The rear dome portion 5a and the edge portion 5b are formed by an appropriate
forming means by an appropriate means such as a printing method. It is preferable that the
dome-shaped portion 6b7b of the outer and inner permanent magnet plate 6.7 and the dome
portion 5a of the middle diaphragm 5 have a concentric spherical shape. . When the central part
of the permanent magnet plate 6.7 is magnetized with the N pole 1 peripheral part with the S
pole, the magnetic poles of the permanent magnets 6 and 7 are such that the N pole and the N
pole, and the S pole and the S pole face each other No. The lines of magnetic force are
symmetrical with respect to the dome portion 5aIIC of the diaphragm 6, and the lines of
magnetic force are mutually opposed at the middle portion thereof, and a synthetic magnetic
field with extremely high severity of the lines of magnetic force is formed at the middle portion.
There is no problem even if the pole and the south pole are reversed.
A central portion and a peripheral portion of domes 116b and 7b in the same direction of the
present WA company are magnetized to different poles, and has a pair of permanent magnet
plates 6 and 7 in which a plurality of overturning motions 7a are drilled. Electroacoustics in
which a diaphragm 5 having a spiral conductor 1a, 9b and having a dome 5a in the same
direction as the domes 6b, 7b is disposed between the pair of permanent magnet plates 6.7.
Since it is a transducer, the entire dome portion 5a of the diaphragm 5 becomes a drive source
and vibrates in the normal direction according to the left-hand rule of almost 7 racing, and the
directivity of sound is wide and high from high to low Since it can be reproduced faithfully and
the dome portion 5a of the diaphragm 6 has almost no non-driving portion. Thin and light, there
is no inertia at the displacement point of the vibration of the dome portion Sa, and a clear sound
quality can be obtained without noise due to such deformation due to the inertia. As permanent
speakers, center balls and pole plates are not required, speakers of the same diameter can save
materials well with the weight of conventional products, can be reduced in materials, can be
easily assembled with few parts, and can be mass-produced inexpensively It is possible.
4. Brief Description of the Drawings FIG. 1 is an exploded perspective view, and FIG. 2 is a
schematic plan view of a diaphragm, and FIG. 3 is an explanatory view showing a generation
state of magnetic lines of force. 5 и и и Diaphragm, 5 m и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
permanent magnet plate, 6m и и и и и и и и 6b и и и dome shape Department. 7
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Conductor. Applicant: Susumu
Fujisawa, agent Noriaki Nozawa EndPage: 2 ? 1 ? 2 ? 3 Page EndPage: ?
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