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JPH08102988

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPH08102988
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
high sound or medium sound speaker having a vertically divided cylindrical diaphragm.
[0002]
2. Description of the Related Art A conventional speaker of this type has a speaker configured to
drive the central portion of a wing-shaped diaphragm as shown in FIG. 1 of Japanese Patent
Publication No. 32-7807 shown in FIG. .
[0003]
Therefore, in the conventional loudspeaker having this type of wing-like diaphragm, it is a
relatively rectangular diaphragm and the fixing point of the outer edge of the diaphragm is from
the driving point Because they are disposed at a high position, it is difficult to balance the
vibration in the longitudinal direction, and there is a problem that unbalance vibration is easily
generated in the lateral direction.
Moreover, in the speaker having such a wing-like diaphragm, if the magnetic gap of the magnetic
circuit is not taken relatively large, the voice coil will run sideways, and there is a problem that
the distortion noise is generated due to the gear rubbing. there were.
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[0004]
Therefore, in order to solve the problems of the speaker having such a conventional wing-like
diaphragm, the present invention provides an intermediate drive of a joint formed by arranging
longitudinally divided cylindrical diaphragms in parallel. The point is fixed by extending the edge
to the same height position as the height of the top plate of the magnetic circuit, and the purpose
is to improve the balance of vibration. A speaker having high electro-acoustic conversion
efficiency and having a convenience in which the diaphragm and the drive unit are separately
manufactured at the manufacturing stage and can be integrally coupled at the time of assembly
while being able to prevent occurrence of lateral vibration It is intended to be provided.
[0005]
SUMMARY OF THE INVENTION The construction of the present invention for achieving the
object will be described with reference to FIGS. 1 and 2 corresponding to the embodiments. Shaped diaphragms 1 and 2 are integrally formed in parallel and formed, and the end of the
driving voice coil bobbin 4 is opposed to the joint 12 line connecting the adjacent straight sides
1a and 2a of the diaphragms 1 and 2 The joint portion 12 is attached to the frame 8 attached
with the portions 4a and 4a attached and fixed, and the edges 1e and 2e of the diaphragms 1 and
2 are attached to the top plate 7 of the magnetic circuit 6 having the annular magnetic gap 6b.
The speaker is fixed to the frame 8 by extending to a position equal to or lower than the height.
[0006]
According to a second aspect of the invention, in the loudspeaker according to the first aspect of
the invention, the opposing portion 4a of the tip of the drive voice coil bobbin 4 is formed on a
connecting portion 12 line connecting the adjacent straight sides 1a and 2a of the diaphragms 1
and 2. , 4a are attached to the center of the joint 12 in a biased manner and fixed.
[0007]
According to a third aspect of the present invention, in the loudspeaker according to the first or
second aspect, a plurality of driving voice coil bobbins having equal diameters on a joint 12 line
connecting the adjacent straight sides 1a and 2a of the diaphragms 1 and 2 to each other. This is
a speaker in which the opposing portions 4a and 4a 'at the ends of the ends 4 and 4' are attached
in a line on the joint portion 12 in a center-symmetrical manner in series and fixed.
[0008]
According to a fourth aspect of the present invention, in the loudspeaker according to the first or
second aspect, a plurality of driving voice coil bobbins having different diameters on a junction
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12 line connecting the adjacent straight sides 1a and 2a of the diaphragms 1 and 2 to each other.
It is a speaker in which the facing portions 4a and 4a ′ ′ at the tips of 4 and 4 ′ ′ are
attached in series and fixed.
[0009]
According to a fifth aspect of the present invention, in the speaker according to any one of the
first to fourth aspects, the vertically split cylindrical diaphragms 1 and 2 are integrally arranged
in a circumferentially parallel manner. A vibrating portion 9 in which the adjacent straight side
portions 1a and 2a are connected to form a joint portion 12 to combine the frame 8 and a
driving portion 26 including a magnetic circuit 6 having a driving voice coil 14 respectively. It is
a speaker that is configured separately and is integrally joined.
[0010]
According to a sixth aspect of the present invention, in the loudspeaker described in any one of
the first to fifth aspects, the vertically split cylindrical diaphragms 101, 102, 103, 104 are
integrally closed in a circumferentially parallel manner. The diaphragms 101, 102, 103, and 104
which are disposed and formed and connect the adjacent straight side portions 101a, 102a,
103a, and 104a to form the joint portions 112, 123, 134, and 114 are formed of an integral
material. Speaker.
[0011]
According to a seventh invention, in the loudspeaker described in any one of the first to sixth
inventions, the vertically split cylindrical diaphragms 201, 202, 203, 204 are closed integrally in
parallel. The diaphragms 201, 202, 203, 204, which are disposed and formed and connect the
adjacent straight sides 201a, 202a, 203a, 204a to form the joint portions 212, 223, 234, 214,
are made of polyamide, polyimide or the like. The speaker is integrally molded of a synthetic
resin material of
[0012]
According to an eighth aspect of the present invention, in the loudspeaker described in any one
of the first to sixth aspects, the vertically split cylindrical diaphragms 201, 202, 203 and 204 are
integrally closed in a circumferentially parallel manner. The magnetic gap 6b is formed by
arranging the magnetic poles 613 of the magnetic pole 612 of the junctions 212, 223, 234 and
214 formed by arranging and connecting the adjacent straight sides 201a, 202a, 203a and 204a.
, 6c, 6d, 6e are radially arranged and formed on the drive unit 26 with facing portions 44a, 44a;
45a, 45a; 46a, 46a; 47a, 47a44a, 45a, 46a at the ends of the voice coil bobbins 44, 45, 46, 47 ,
47a attached and fixed.
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[0013]
Therefore, the speaker of the present invention has a structure in which the drive point of such a
diaphragm is mounted at a position higher than the fixed point of the edge of the diaphragm, so
a large electricity Also for the input, the balance of the vibration is improved, so that the lateral
vibration of the vibration system including the diaphragm can be prevented from being
generated, and the electro-acoustic conversion efficiency can be improved, and it is broad
Directing characteristics can be obtained.
[0014]
Embodiments of the present invention will be described with reference to the drawings.
1 to 16 show a speaker according to the present invention, wherein FIG. 1 is a cross-sectional
view of an embodiment of the first invention speaker, and FIG. 2 is an embodiment of the center
drive type of FIG. FIG. 3 is a front view of an embodiment in which the drive unit of the first
invention is eccentrically attached, FIG. 4 is a IV-IV longitudinal sectional view of FIG. 3, FIG. 5 is
a second invention of the present invention. 6 is a cross-sectional view showing an embodiment
of the present invention, FIG. 6 is a VI-VI longitudinal cross-sectional view of an embodiment
equipped with the drive unit of the same diameter in FIG. 8 is a longitudinal sectional view taken
along line VIII-VIII in FIG. 7, FIG. 9 is a transverse sectional view showing a disassembled
structure of the embodiment of the fourth invention speaker, and FIG. 10 is a longitudinal
sectional view taken along line XX in FIG. 11 is a cross-sectional view of a back-to-back dual-use
invention speaker according to the present invention, FIG. 12 is an XII-XII longitudinal crosssectional view of the back-to-back double loudspeaker of FIG. FIG. 14 is a cross-sectional view of
the inventive speaker, FIG. 14 is a perspective view of the diaphragm of FIG. 13, FIG. 15 is a
diagram showing directional characteristics and distortion characteristics of the inventive
speaker, FIG. 16 shows directional characteristics and distortion characteristics of a conventional
dome-shaped tweeter FIG.
[0015]
In the speaker according to the first aspect of the present invention, in FIG. 1 and FIG. 2,
reference numerals 1 and 2 denote vertically divided cylindrical diaphragms, and one sheet of
material is bent or the like to integrally form two parallely in the same direction. To the magnetic
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circuit 6 in which the annular magnetic gap 6b is formed in the middle portion 12 middle portion
12m, 12m of the joint portion 12 on the joint portion 12 where the adjacent straight sides 1a, 2a
of the diaphragms 1, 2 are connected. The tip opposing portions 4a, 4a of the movable coil
bobbin 4 mounted, ie, the concentrated driving portions are attached and fixed, and the edges 1e,
2e of the diaphragms 1, 2 are attached to the upper surface of the top plate 7 of the magnetic
circuit 6a. This is a basic structure of a center-driven speaker according to the present invention,
which is fixed to the frame 8 and is as high as the frame 8 and extends to a position lower than
the drive unit 4 a.
In addition, 22 is a magnet and 23 is a damper.
[0016]
When the diaphragms 1 and 2 are made of synthetic resin and integrally molded as described
above, when they are bent from the center line, a mechanically strong joint portion 12 is formed,
and the strength is stable against vibration. Hold.
The speaker of such a double diaphragm is combined with the magnetic circuit 6 as a single unit,
easy to use as a high sound speaker, and disposed in front of the low sound speaker in the
longitudinal direction to be 2-way or 3-way. In the case of a coaxial speaker of this type, space
can be effectively used, and the directivity characteristic of the high range becomes broad in the
horizontal direction, which is advantageous.
[0017]
FIGS. 3 and 4 show a connecting portion 12 in which the mounting position of the drive portion
of the speaker according to the first invention of which the cross section is shown in FIG. 1 is the
connection of adjacent straight sides 1a and 2a of the diaphragms 1 and 2. The opposing
portions 4a and 4a of the tip of the drive voice coil bobbin 4 are attached to a position
decentered by removing the center 12m of the joint 12, and the vibration of the diaphragms 1
and 2 is standing. As it is difficult to get on the waves, it is possible to reproduce the sound
without distortion and without peaks and dips from the treble part to the mid part in the
vibration form.
[0018]
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The second invention speaker shown in FIGS. 5, 6, 7 and 8 is formed by connecting the adjacent
straight sides 1a and 2a of the vertically divided cylindrical diaphragms 1 and 2 in the first
invention speaker. The drive units having opposing portions 4a, 4a; 4a ′, 4a ′ of the ends of
the drive voice coil bobbins 4, 4 ′ having the same diameter on the joined portion 12 line are
mounted on the joined portion 12 centrosymmetrically centrosymmetrically 7 and 8 among the
speakers shown in FIG. 7 and FIG. 8 are a plurality of speakers on the junction 12 line in which
the straight side portions 1a and 2a are connected by extending the diaphragm long. This is a
speaker in which driving units having opposing portions 4a and 4a 'at the ends of driving voice
coil bobbins 4 and 4' having different diameters are attached and fixed in series on the joint 12
line.
The loudspeakers shown in FIGS. 5, 6, 7 and 8 are all suitable for high-power loudspeakers
because the driving force per unit area of the diaphragm is strong.
[0019]
In the loudspeaker according to the third aspect of the present invention, in the loudspeaker
described in FIG. 9 and FIG. 10, the longitudinally split cylindrical diaphragms 1 and 2 are
integrally formed in a circular arrangement in parallel and closed. The process of producing the
diaphragm which joined the adjacent straight side part 1a, 2a, and formed the junction part 12,
the vibration part 9 which combined the frame 8, and the magnetic circuit 6 which comprised
the drive voice coil bobbin 4 are included. This is a speaker having a convenient configuration in
manufacture, which can be manufactured separately from the drive unit 15 in a separate process
and can be integrally joined in a separate process.
With such a configuration, the speaker according to the third aspect of the present invention
manufactures a large number of magnetic circuits 15 having voice coils 14 having different
diameters in a separate process, and magnetic circuits 6, 15. There is a convenience that can be
assembled with a high degree of freedom in that it can be appropriately selected and attached
according to the application of the speaker.
[0020]
In the loudspeaker according to the fourth aspect of the present invention, in the loudspeaker
described in FIGS. 11 and 12, two sets of longitudinally split cylindrical diaphragms 101, 102;
103, 104 are integrally arranged in a circumferentially parallel manner. And the adjacent
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straight sides 101a, 102a; 103a, 104a are connected to form junctions 112, 123; 134, 114, and
magnetic gaps 16b, 16c are arranged back to back and assembled. The junctions 112 and 134
are joined and fixed to the end facing portions 40a and 40a 'of the voice coil bobbins 24 and 25
of the circuit 36, and the longitudinally divided cylindrical diaphragms 101, 102 and 103; 3e and
4e are fixed to the outer periphery of the magnetic circuit 36.
[0021]
In the speaker having such a configuration, the diaphragms 101, 102; 103, 104 are integrally
arranged in parallel and integrally formed, and the adjacent straight sides 101a, 102a; 103a,
104a are connected. As shown in FIGS. 11 and 12, it is advantageous in terms of quality and
manufacturing cost to integrally form the joint portions 112, 123; 134, 114 with synthetic resin
materials such as polyamide and polyimide.
Paper or sheet metal may be used.
As a material of the diaphragm of the speaker of the present invention, synthetic resin materials
such as polypropylene, polyamide, polyimide and the like are suitably used, but paper or thin
metal plate may also be used.
[0022]
Also, in the special purpose speaker, when the amplitude is expected to increase, the extension
portions of the diaphragms 1, 2,..., That is, the attachment portions to the frame 8 or the
magnetic circuit 36 have a compliance action. If corrugations are formed and fixed to the frame 8
or the magnetic circuit 36 via them, they can cope with large amplitudes and do not distort.
[0023]
In the loudspeaker according to the fifth aspect of the present invention shown in FIG. 13,
longitudinally divided cylindrical diaphragms 201, 202, 203 and 204 are integrally arranged in
parallel and integrally, and their adjacent straight sides are Four junctions 212, 223, 234, and
241 connected and formed are arranged radially and four back to back are arranged in parallel,
and integrally formed a three-dimensional resin diaphragm as illustrated in FIG. 14 radially. It is
a thing.
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[0024]
The drive section 26 is formed such that magnetic gaps 6b, 6c, 6d and 6e are radially arranged
back to back.
Then, voice coils are inserted into the magnetic gaps 6b, 6c, 6d, 6e of the drive unit 26, and the
facing portions 44a; 44a; 45a; 45a; 46a; 47a and 47a are attached and fixed, all of the four
curved diaphragms are arranged with the curved surfaces directed outward.
[0025]
In the drive unit 26, the junctions 212, 223, 234, 241 with the diaphragms 201, 202, 203, 204
are arranged radially, so that the rigidity of the diaphragms 201, 202, 203, 204 itself, A
loudspeaker suspended in the magnetic gaps 6b, 6c, 6d, 6e by a damper.
If thermoplastic synthetic resin is used for such diaphragms 201, 202, 203 and 204 and they are
integrally formed by pultrusion as shown in FIG. 14, it is advantageous in terms of quality and
cost.
[0026]
The loudspeaker of the structure of the fourth and fifth inventions (FIGS. 11, 12, 13 and 14) is an
ideal nondirectional cylindrical loudspeaker as a so-called breathing type loudspeaker that
expands and contracts in the radial direction. It is suitable as a high or low tone speaker.
In this case, needless to say, as the vibration mode, the drive unit 26, so that the vibration
directions of the diaphragms 101, 102, 103, 104; 201, 202, 203, 204 expand and contract in the
same direction. It is necessary to make the winding directions of the 36 voice coils reverse to
each other or to adjust the magnetic field direction of the magnetic gap.
[0027]
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As shown in FIG. 15 (the present invention speaker) and FIG. 16 (the prior art dome shaped
speaker) in comparison with the typical directivity characteristics of the loudspeaker according
to the present invention, the on-axis high-tone limit (upper In the characteristic curve of (: thick
solid line), the conventional speaker (FIG. 16) drops sharply from 20000 Hz, but the inventive
speaker (FIG. 15) extends to over 30000 Hz.
As for directivity characteristics, at 30 ° off (thin solid line), the loudspeaker according to the
present invention is hardly separated from the on-axis characteristic curve, whereas the
conventional loudspeaker (FIG. 16) has already attenuated from 10000 Hz.
Even in the case of 60 ° off (thin dotted line), the conventional speaker has clearly dropped
from about 8000 Hz, while it has not attenuated to near the high sound limit (30000 Hz or
more).
Also from this characteristic, it is clear that the directivity characteristic of the speaker of the
present invention is broad and excellent.
[0028]
Also in the distortion characteristic (lower characteristic curve), both the second harmonic
(indicated by a thick solid line) and the third harmonic (indicated by a thin solid line) according
to the present invention speaker (lower characteristic curve in FIG. 15) ) Has a value much
smaller than that of the conventional speaker (the lower characteristic curve in FIG. 16).
As described above, the speaker of the present invention is a high-class speaker having extremely
excellent characteristics as compared with the conventional speaker.
[0029]
Although the embodiments which are considered to be representative of the present invention
have been described above, the present invention is not necessarily limited to only the structure
of these embodiments, and has the above-described constituent features according to the present
invention, and In order to achieve the object of the present invention, the present invention can
be appropriately modified and implemented within the scope having the effects described below.
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[0030]
As is apparent from the above description, the loudspeaker according to the present invention is
a loudspeaker provided with a so-called wedge-shaped vertically divided cylindrical diaphragm,
and is a center-driven flat loudspeaker In terms of acoustic radiation principle, broad directivity
characteristics, excellent acoustic radiation efficiency, distortion characteristics with little
harmonic distortion, and effective space can not be expected from conventional loudspeakers
with cone-shaped diaphragms. It came to have the remarkable effect that it could have various
excellent characteristics such as Facta.
[0031]
Brief description of the drawings
[0032]
1 is a cross-sectional view showing an embodiment of the speaker of the first invention.
[0033]
2 is a longitudinal sectional view of FIG. 1 II-II.
[0034]
3 is a longitudinal sectional view (III-III sectional view of FIG. 1) of the embodiment of the
speaker in which the drive portion of the first invention is eccentrically attached.
[0035]
4 is a vertical cross-sectional view of FIG. 3 IV-IV.
[0036]
5 is a cross-sectional view of an embodiment showing multiple driving of the same diameter
voice coil of the second invention.
[0037]
6 is a vertical cross-sectional view of FIG.
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[0038]
7 is a front view showing an embodiment of a speaker representing multiple driving of the
different diameter voice coil of the second invention.
[0039]
8 is a longitudinal sectional view taken along line VIII-VIII in FIG.
[0040]
<Figure 9> It is the cross section diagram which shows the disassembly structure of the 3rd
invention speaker.
[0041]
10 is an XX longitudinal sectional view of FIG.
[0042]
11 is a cross-sectional view of a back-to-back double application of the speaker of the fourth
invention of the present invention shown in FIG.
[0043]
12 is an XII-XII longitudinal cross-sectional view of the back-to-back double speaker of FIG.
[0044]
FIG. 13 is a cross-sectional view of a breathing cylinder type loudspeaker according to the
present invention in which magnetic gaps are radially arranged.
[0045]
14 is a perspective view of the diaphragm of FIG.
[0046]
15 is a diagram showing the directivity characteristics and distortion characteristics of the
speaker of the present invention.
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[0047]
16 is a diagram showing the directivity characteristics and distortion characteristics of the
conventional dome-shaped speaker.
[0048]
FIG. 17 is a first view of Japanese Patent Publication No. 32-7807 showing a structure of a
speaker as prior art.
[0049]
Explanation of sign
[0050]
1, 2, 101, 102, 103, 104; 201, 202, 203, 204 longitudinally divided cylindrical diaphragms 1a,
2a; 101a, 102a, 103a, 104a; 201a, 202a, 203a, 204a straight sides 1e, 2e Edges 12, 112, 123,
134, 114; 212, 223, 234, 214 junctions 4, 4 ', 4' '; 44, 45, 46, 47 Voice coil bobbins 4a, 4a', 4a '',
44a, 45a, 16a, 47a Opposite part 14 Drive voice coil 26 Drive part 6; 6b, 6c, 6d, 6e Magnetic
circuit 7 Top plate 8 Frame 9 Vibration part
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