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JPS5132321

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DESCRIPTION JPS5132321
1 ? Name of invention
Electrodynamic microphone diaphragm
3. Detailed Description of the Invention The present invention relates to a diaphragm of an
electrodynamic microphone. The shape of the diaphragm in which copper, aluminum, etc. are
printed and wired to the conventional high insulation material film is a quadrilateral as shown in
FIG. 1 and shown in FIG. 2 in order to conform to the shape of the magnet. Thus, in the case of a
circular shape, conductors are often arranged in a spiral shape. In the figure, (7) and (9) indicate
insulating films, and (s, Or) indicate coils. These diaphragms obtain a uniform reproduction zone
as a microphone, and in order to widen the reproduction zone, it is necessary to adjust the
rigidity and elasticity of the diaphragm in a well-balanced manner. In the case of a quadrilateral
diaphragm, it is difficult to make the elasticity uniform according to the direction of the
conductor, that is, the entire quadrilateral does not easily vibrate uniformly because the
conductor acts as a lip. Also, in the case of a spiral, since the end of the conductor is at the center
of the circular diaphragm, it is necessary to connect a lead, such as copper foil, to the center of
the diaphragm when pulling out to the outside.? ? ? lengthens the sound. The present
invention ameliorates the above-mentioned drawbacks, and an object of the present invention is
to provide an electrodynamic microphone having a flat frequency characteristic by preventing
divided vibration in a diaphragm. Next, an embodiment of the present invention will be described
with reference to the drawings. In FIG. 3 ((), (b), (1) is a circular diaphragm made of a thin film
EndPage: 1 of highly insulating material, (2) is a substantially U-shaped coil group, and A1 is in
the middle 6 parts. A U-shaped coil is provided, A2 is a U-shaped coil disposed on the outside of
A1, and similarly, a large number of U-shaped coils are disposed on the outside, and one end of
the AI coil is a starting terminal ( 4), A, the other end of the coil is connected to one end of the
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next A2 coil by the radial lead-out part (6) and the arc-like lead-out part (i, radial lead-out part
(6), A2 coil The other end of is connected to the A3 coil by the radial lead-out portion and the
arc-like lead-out portion, and the outermost coil is connected to the termination terminal (5). In
addition, the part in which many arc-like derivation | leading-out parts exist is a part crimped |
bonded to a support ring (3). That is, the conductor printed on the diaphragm has its end
positioned on the support ring, and the effective conductor portion is concentrated at the center
of the diaphragm to increase the density of the effective conductor and increase the inertia of the
diaphragm center. Do. Further, between the central portion and the support ring, the density of
the conductors, that is, the lead-out portions is made sparse, and by arranging the radial lead-out
portions at equal intervals, the increase of inertia due to the conductor is prevented (3) and
appropriate elasticity is given. Configure to vibrate uniformly. In addition, the conductor part
located on the top of the magnetic circuit in the center part has a large inertia, and by selecting
the thickness of copper and aluminum of the conductor material, it is possible to make an
appropriate inertia, and polyiside which becomes a high insulation material By selecting the
material and thickness, such as polyester, mica, phenolic resin, can be any elasticity, by selecting
the thickness of the conductor, the quality and thickness of the high insulation material, the
regeneration zone Can spread the uniform reproduction characteristics.
4. Brief Description of the Drawings FIG. 1 and FIG. 2 show the conventional diaphragm, FIG. 3
shows the diaphragm of the present invention, (A) shows a plan view, and (B) shows a sectional
view. (1) ... diaphragm, (2) ... coil group, (3) ... support ring, (4) ... starting terminal, (5) ... terminal
terminal, (6) и Radial lead-out portion, (n + (9) и и и insulating film, (S), ? O и и и и и и Patent applicants
Foster Electric Corporation и и '(agent patent attorney Satoshi Takayama (2, husband и ? ( 4) 1st i!
I Figure 2 (Ron Procedure Amendment February 25, 1975 [7. Patent Office Director Hideo Saito
1; Display of the case 1974 patent application No. 104834-2-2; name of the invention 2; name of
the invention Microphone diaphragm) 3, Person concerned with the correction Case concerned
Applicant, Name (name) Foster Electric Co., Ltd. 4, Agent Address Tokyo District Kodocho 261-6
Kocho Coporus Room 205, correction order of 5 Date pear date Showa 6, number of inventions
increased by correction EndPage: 2 correction specification 10 name of the invention 10 name of
the invention electrodynamic microphone diaphragm
Electrodynamic microphone diaphragm
3. Detailed Description of the Invention The present invention relates to a diaphragm of an
electrodynamic microphone. A known electrodynamic micropon of this type has, for example, a
structure as shown in FIG. 1, in which (1) is a diaphragm made of a thin film of a highly
insulating material, and (2) is the above-mentioned diaphragm The magnetic pole faces opposed
to the diaphragm are alternately magnetized in different polarities, resulting in the distribution of
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magnetic flux as shown by a broken line. (3) is at least one conductive coil provided by printing
or laminating copper, aluminum or the like on the diaphragm between the adjacent magnetic
poles, and (4) is a yoke. Conventionally, the shape of the diaphragm and conductor in the abovementioned structure has many quadrilaterals as shown in FIG. 2 to conform to the shape of the
magnet, and in the case of a circle, it is spiral wound as shown in FIG. The conductors are often
arranged in In the figure (7) and (9) are insulating films, (S>. (1 G shows a coil. These diaphragms
must obtain a uniform reproduction zone as a microphone, and in order to widen the
reproduction zone, the stiffness and elasticity of the diaphragm must be adjusted in a wellbalanced manner. ??? However, the quadrilateral diaphragm is unlikely to have uniform
elasticity due to the direction of the conductor. That is, since the conductor acts as a lip, the
entire quadrilateral is less likely to vibrate uniformly. Also, in the case of a spiral shape, since the
end of the conductor is at the center of the circular diaphragm, it is necessary to connect a lead
wire such as copper foil to the center of the diaphragm when pulling out to the outside. give. The
present invention ameliorates the above-mentioned drawbacks, and an object of the present
invention is to provide an electrodynamic microphone having a flat frequency characteristic by
preventing divided vibration in a diaphragm. Next, an embodiment of the present invention will
be described with reference to the drawings. In Fig. 4 (a) and (b), the right) is a circular
diaphragm made of a thin film of highly insulating material, (3) is a U-shaped coil group, and A1
is provided in the middle part 6 A-shaped coil, A2 is a U-shaped coil disposed outside A1 and so
on and so forth, with a large number of U-shaped coils disposed J) one end of the A1 coil forms a
starting terminal (5) (A, the other end of the coil is connected to the radial lead-out portion (7),
and the other end of the% Am coil is connected to the A3 coil by the radial lead-out portion and
the arc-like lead-out portion. The outer coil is connected to the termination terminal (6). The
portion in which a large number of arc-shaped lead-out portions exist is a portion that is crimped
to the support rings (3) and (8). That is, the conductor printed on the diaphragm has its end
located on the support ring, and the effective conductor portion is concentrated on the center of
the diaphragm, the density of the effective conductor is increased, and the inertia of the
diaphragm center is increased. Do.
In addition, the density of the conductor, that is, the lead-out portion is sparse between the center
portion and the support ring, and the radial lead-out portion distributes power at equal intervals,
prevents the increase of inertia by the conductor, gives appropriate elasticity, and vibrates
uniformly. Configure to In addition, the conductor part located on the upper surface of the
magnetic circuit in the center part has a large inertia, and the thickness of copper and aluminum
of the conductor material can be selected. Choose material and thickness, such as polyester, mica,
phenolic resin, K can be any elastic, can choose the conductor thickness, high insulation material
quality and thickness, the regeneration zone Can spread the uniform reproduction
characteristics.
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4. Brief description of the drawings (4) EndPage: 3 FIG. 1 is an explanatory view for explaining
the operation principle, FIG. 2 and FIG. 3 show a conventional diaphragm, and FIG. 4 shows a
diaphragm of the present invention (A) shows a plan view and (B) shows a cross-sectional view.
(1) ииииии Diaphragm, (2) иии и и и Permanent magnet, (3) и и и и и и и и (4) и и и и и и и и и и и Yoke, (5) ...... starting
terminal, (6) ... ... terminating terminal, (7) ...... radial deriving unit, (8) ...... support ring applicant
Foster Electric Co., Ltd. Attorney Attorney Takayama ((5) EndPage: ?
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