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JPS59193696

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DESCRIPTION JPS59193696
[0001]
(Industrial field of application) The present invention relates to a horn of a horn type speaker.
(Purpose of the invention) To reduce the resonance noise of the Horn Patent, to reduce the
weight of the horn, and to improve the weather resistance of the C-min-based horn is based on
LI. (Conventional technology) The material of the horn of a horn type speaker consisting of a
compression driver (driver unit) for emitting voice and the like and a horn portion is
conventionally metal such as aluminum or brass or nonmetal such as plastics or wood. The For
this reason, since it is weak as 4M, especially the horn made of metal material has a small
internal loss of the material itself, the frequency of the sound emitted from the driver is a specific
resonance frequency determined by the material and shape of the horn When matched, it emits a
horn-specific resonant sound. In addition, even if the driver's sound stops, the horn's resonance
does not stop immediately and becomes a reverberation. Such horn-specific resonance and
reverberation are particularly harmful to the sound quality of the reproduced sound. (Problems
to be solved by the invention) A resonance sound and a reverberation specific to horns cause
deterioration in the sound quality of the reproduced sound. (Means for Solving the Problems) In
order to solve the above-mentioned problems, the present invention forms a structure with a
polymer foam, and covers the entire surface of this structure with a glass fiber cooled
?reinforcement resin?. The present invention provides a horn-type speaker which features the
following features. EXAMPLE The horn of the present invention is formed by using a polymer
foam, and the entire surface of this structure is made of glass fiber reinforced resin (Qlassfibcr
reinforced plastics). Hereinafter, it is a horn that is hh W in accordance with FRP). 1 to 3 (well, 1
to 3 show first to third embodiments of the bone according to the present invention, and FIGS. 4
and 5 show the J characteristics of the horn according to the present invention) FIG. FIGS. 1 (?)
to (C) show the first embodiment of the horn according to the present invention. Fig. 1 ?) is a
side cross-sectional view of the horn 2 attached to the compression driver 1, Fig. 1 (B) is a plan
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partial cross-sectional view of the horn 2, and Fig. 1 (C) is a horn opening 2?. FIG. Fig. 1 <A),
(13) show a horn-type speaker in which a fan-shaped horn 2 (Exponensi 1 full horn or hyperpolyk horn) is connected to the tip of a compression driver 1 for emitting sound etc. It shows.
The horn 2 is composed of a structure 3 formed of a foamed resin which is a polymer foam, and
an FRB coated on the entire surface of the structure 3 (the outer surface 4 and the inner surface
5 of the bone 2).
?????????? Li is a reinforced plastic reinforcement material that is one of the
applications, and it is a lc glass fiber reinforced resin that uses plus deck that bonds well with
glass 11 [. Since this FRB has high strength, it is used in a wide range of applications (body for
aircraft, automobile, HAJ, etc., building material, tank, pipe, furniture, helmets 1-2, fishing rod,
etc.) Be able to withstand 1 ░ high temperature and not burn, not absorb water, have extremely
low hygroscopicity, have good chemical durability, be extremely strong in scratch strength, have
a small elongation, have a large specific gravity If mat-like, it is that heat insulation and 711
bamboo are large. (The above-mentioned small 2 can be made into i'J and il very much as
compared with the conventional 4R3 (one body of material because the foamed resin is used for
14 restoration 3). And, its processing is easy. Also, since the structure is light 111T, the coupling
member with the compression driver may be smaller in strength than the conventional one. FIGS.
2 (A) to 2 (C) show the second embodiment of the horn according to the present invention. 2 (?)
is a side sectional view of the bone 6 taken by the compression driver 1. FIG. 2 (B) is an enlarged
plan view of the horn 3 and FIG. 2 (C) is a horn opening. 6 is an enlarged partial cross-sectional
view of 6 6. The loudspeakers shown in FIG. 2 <?) and (B) are horn-type loudspeakers of conical
shape. Like the one shown in FIG. 1, the horn 6 is an lj'j M body 3 formed of a foamed resin,
which covers the entire surface (the outer surface 7 and the inner surface 8 of the horn 6) of the
structure 3 F! ?????????? FIGS. 3 (A) and 3 (B) show a third embodiment of the horn
according to the present invention. FIG. 3 (A) is a side sectional view of the horn 9, and FIG. 3
([3]) is a bottom view of the horn 9 to which the compression driver 1 is attached. One horn
shown here is an overall directional horn. Although FIG. 3 (?) shows that the horn 9A and the
horn 9B are separated, it is needless to say that both are coupled C so as not to affect
acoustically. The horn 9 is similar to the horn shown in FIGS. 1 and 2 from the structure 3 ? and
3 B made of a foamed resin and the FRB covering the entire surface of these structures. The
entire surface (upper surface 10 and inner surface 11) of the structure 3A is covered with LJ I:
RB. The entire surface (bottom 12 and inner surface 13) of the structure 3B is also covered with
the FRB.
The compression driver 1 is C fitted and fixed to the hole 14 in the bottom surface 12 of the horn
9] 3 with the sound f6'J'i, y tip up. It should be noted that although the polyhorn has meat or lrl
'c' in Fig. 1 to Fig. 3 mentioned above, the horn itself is made of polymer light foam and attached.
is there. Fig. a14 Fig. 31 is a diagram upon receiving the output power 1; 1 of the
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omnidirectional horn shown in Fig. 13. In the figure, the broken line <W> -C mark 1 ? l I
bamboo is the characteristic of the conventional horn (the characteristic of the aluminum cast
horn), and the solid line (X) C mark ? characteristic tI1. L: Il is the characteristic of the
omnidirectional horn according to the present invention. In the measurement method, the
acceleration t1 is taken at the leading edge of the small-scale to be measured "), and the
measurement is performed by applying the same human power to the ejection driver. In the
figure, the (W) characteristic is for aluminum cast bone, or it is not easy. There is 1 oof-l 7.8000
1-I Z) and the high range (! 1 (to around 1001-1y, -200001-1z) A resonance peak follows -C. The
(W) characteristic is higher in level than the (X) characteristic over the entire level. The <X>
property is due to the horn of the polymer foam structure whose surface is covered with a scale
13 or the (W) property, and the level is small over the whole level. In particular, the level is
significantly attenuated C as compared with the W> characteristic as the frequency becomes
higher (near 5 (1001-Iz to 200001-1z)). From this, it can be understood that the horn which
brightens the lens can lower the resonance height specific to the horn as compared with the
conventional horn. FIG. 5 shows the output 'Ij characteristics of an omnidirectional horn made of
different qualities as shown in FIG. In the figure, the broken line (Y) indicates the characteristic of
the horn made only of F RB, the characteristic indicated by the solid line (Z) is the characteristic
of the bone of the present invention, and the surface is It is a characteristic of the small diameter
of the 114-fold polymer foam covered. The measuring method is the same as measuring the one
in FIG. In the figure, the (Y) characteristic is a horn made only with FRB, so it may be structurally
weak, probably in the middle region (near 200-2000 1-1 z), (7) 41 jilIt J, This means that the
horn of the present invention, in which the polymer foam is coated with the FRB, has
unnecessary resonance in the middle region than the horn made of only the FRB. It turns out that
it is OK to occur.
1 J noted: Since the horn according to the present invention is made of a polymer foam structure
in which the surface is coated with F t '<t 3, it withstands high temperatures and absorbs water
compared to metal horns. Because it has good weatherability, it has good weather resistance and
is suitable as a horn to be used outdoors. B. 1.11. The horn shape of the present invention is not
limited to the C b of b limited to the above-mentioned shape, for example, conical horn,
cylindrical horn, para-poly horn, multiple coupling horn, and J-. It is possible to use the shape of
the ground horn, Marji L Lula horn, reflex horn, step bones, or spiral wound, as a matter of
course. Thus, the minor re-use band according to the present invention is used in any one of the
bass, mid and high eight bands. (Effects) It is possible to provide a bone having a reduced noise,
light ffi, and improved weather resistance of the horn I'ji i.
[0002]
Brief description of the drawings
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[0003]
1 to 3 show the first to third embodiments of the small-n according to the present invention, and
FIGS. 4 and 5 show the output j characteristics of the horn according to the present invention. .
1 и и и и и и и и Compression Triver, 2.6.9, 9B и и и Horn, 3.3A, 3B и и и Structure, 4, 7. 13 и и и Outer
surface, 5, 8. 11 и и и Inner surface, 10 ... top surface, 12 ... bottom surface, 14 ... hole. Patent
Assignee Nippon Victor Co., Ltd. Fig. 1 (C) c. Item 1'1 display OB sum 58 year patent application
No. 68,136 Ц 'i2, the horn 3 of the horn type speaker, the relation with the province 11'1 that
corrects the special b' [applicant's God] Name: 3-12, Moriya-cho, Jina-ku, Yokohama-shi, Kyoto,
Japan Name: (/ l 32) IEI Wood Victor Co., Ltd. White light stop 5, correction ? и 1 elephant
specification N1 full text G ,? + Li Positive content as described in the separate sheet. A1 Detailed
description, Title of the invention Horn-type speaker horn 2, Claims (1) Form a structure from a
polymer foam, glass the entire surface of this structure A horn of a horn type speaker
characterized in that it is coated with a fiber reinforced resin. (2) The horn of the horn-type
speaker according to claim 1, characterized in that the structure is formed of a foamed resin and
made of plastic. (3) The horn according to claim 1, wherein the horn is an omnidirectional horn.
3. Detailed description of the invention (industrial application field) The horn-type speaker horn
is concerned. (Object of the Invention) It is an object of the present invention to provide a horn
with reduced resonance noise specific to the horn, lightening of the horn, and improved weather
resistance of the horn. (Prior Art) The material of the horn of the horn type speaker consisting of
a compression driver (traiver unit) for emitting sound etc. and a small portion has conventionally
been made of metal such as aluminum, brass or non-metal such as plastics or wood. It was metal.
For this reason, structurally weak, especially the horn made of metal material has a small internal
loss of the material itself, so the sound wave released from the driver matches the unique
resonance frequency determined by the material and shape of the horn When you do, it emits a
horn-specific resonance sound. Also, even if the driver's sound stops, the horn's resonance does
not stop. Such horn-specific resonance sounds are particularly harmful to the sound quality of
the reproduced sound. (Problems to be Solved by the Invention) The bone-specific resonance
sound causes deterioration in the sound quality of the reproduced sound. (Means for solving the
problems) In order to solve the above-mentioned problems, the present invention is to form a
structure with a polymer foam and to cover the entire surface of the structure with a glass fiber
reinforced resin. A horn of a horn type speaker characterized by the present invention is
provided.
EXAMPLE The horn of the present invention is formed of a 1553u body using a polymer foam,
and the entire surface of this structure is a glass fiber reinforced resin (Glassfiber reinforced
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plastics). Hereinafter, it is a horn covered with FRP. 1 to 3 show the first to third embodiments of
the bone according to the present invention, and FIGS. 4 and 5 show the resonance
characteristics of the horn according to the present invention. FIGS. 1A to 1C show a first
embodiment of the horn according to the present invention. 1 (A) is a side cross-sectional view of
the horn 2 attached to the compression driver 1, FIG. 1 (B) is a plan partial cross-sectional view
of the horn 2, and FIG. 1 (C) is an enlarged portion of the horn opening 2A. FIG. Fig. 1 (?), (B)
shows a horn-type speaker in which a fan-shaped horn 2 (exponential + full horn or hyper-polyk
horn) is connected to the tip of the compression driver 1 for emitting sound etc. Indicates C. The
horn 2 has a structure 3 made of a foamed resin which is a polymer foam, and an FRP coated
with the entire surface of the structure 3 (the outer surface 4 and the inner surface 5 of the horn
2). F.sub.RI- 'is a reinforced plastic reinforcing material which is one application of glass fiber,
and is a glass fiber reinforced resin using a plus deck which bonds well with the glass 11i.
Because of its high strength, this FRP is used in a wide range of applications (aircraft, car, car
body, building materials, tanks, pipes, furniture, helmets, fishing rods, etc.). Since the abovementioned small 2 uses a foamed resin for the 414 structure 3, it can be made very lightweight
compared to the material of the conventional structure. And, its processing is easy. In addition,
since the structure is lightweight, the joint I with the compression driver may be smaller in
strength than the conventional one. 2 (A) to 2 (C) show a second embodiment of the horn
according to the present invention. Fig. 2 (A) is a side sectional view of the bone 6 attached to the
compression driver 1, Fig. 2 (B) is an enlarged plan view of the horn 6, Fig. 2 (C) is an enlarged
part of the horn opening 6A. FIG. The Lithby force shown in FIG. 2 (A>, '(B)) is a conical speaker
having a conical shape. The horn 6 is, as shown in FIG. 1, composed of a structure 3 formed of a
foamed resin and FRP coated on the entire surface (the outer surface 7 and the inner surface 8 of
the horn 6) of the structure 3.
FIGS. 3 (A) and 3 (B) show a third embodiment of the horn according to the present invention.
FIG. 3 (A) is a side sectional view of the horn 9, and FIG. 3 (B) is a bottom view of the l horn 9
with the compression driver 1 attached. The horn shown here is an omnidirectional exit. In FIG. 3
(A), the horn 9 ? and the horn 913 are in a minute IlI! J: J J:: ? ? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?:::::
?:: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
? ?::: ? ?: ? Although it is of course illustrated that the two provinces are connected so as not
to affect acoustically. The horn 9 is, like the bone shown in FIGS. 1 and 2, composed of structures
3A and 3B made of a foamed resin and FRP covering the entire surface of these structures. The
entire surface (upper surface 10 and inner surface 11) of the 4f, i, 3 / li body 3? is covered with
FRl). , R, L 3 I body 3B all surfaces (bottom 12 and inner 13) t) F RP-('covered. The compression
driver 1 is fixedly fitted with its front end facing up into the hole 14 in the bottom surface 12 of
the horn 9B. <= 63, as described above with reference to FIGS. 1 and 3, although the poly-horn
has a thick wall, each horn is made of a polymer foam and is lightweight. Fig. 4 (shows the
resonance characteristic of the omnidirectional horn shown in Fig. 3). In the figure, the
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characteristic indicated by the broken line (W) is the tj property of the conventional horn
(aluminum K '!! The characteristics of the horn of M) and the special 1 ') shown by a solid line (x)
are the characteristics of the omnidirectional horn according to the present invention. In the
measurement method, an acceleration gauge was attached to the leading end of the horn to be
measured, and measurement was performed by applying the same human power to the
compression driver. In the figure, the (W) characteristic has a fairly sharp peak (2500)-17, 800
ON (Z i) near) because of aluminum vf-made horn, and the resonance peak to the high region (up
to 5000 HZ-200001-1 z)) It is continuing. (W) The characteristic is over the level of the holiday
(X) Characteristic J: the level is also large. Because of the horn of the polymeric foam structure
with its surface covered with F R1 (X) properties, the (W) properties are also at a lower level over
the whole level. In fact, the level is considerably attenuated more than the (W> characteristic) as
the high region nears <50001-Iz to 20000t-1z). From this, it can be seen that the horn according
to the present invention can suppress the resonance noise specific to the horn as compared with
the conventional horn. The characteristic shown by the broken line (Y) in FIG. 5 is the
characteristic of the horn made only with FR)-), and the characteristic shown by the solid line (Z)
is that of the polymer foam of the present invention. "It is the characteristic of the horn which
covered the body with" one point.
The measuring method is the same as measuring the one in FIG. In the figure, the (Y)
characteristic is a horn made only of FRP, so it is weak in the 414 direction, so it is considerably
higher than the (Z) characteristic in the middle region (200 to 2 (near 100 II Z q). A level of
resonance is continuing. From this, it can be seen from the horn made only of J: soot and FRP
that h of the horn of the present invention in which the polymer foam is coated with l = RP does
not cause unnecessary resonance in the middle region. As described above, the horn according to
the present invention is made of a polymer foam m-adhering body in which the surface is coated
with FRP, so it does not oxidize like a metal horn, so it has good weather resistance. Suitable as a
horn for outdoor use. The shape of the horn according to the present invention is not limited to
the above-described shape. For example, conical horns, cylindrical horns, parapoly bone bones,
multiple coupled horns, and so forth] It goes without saying that the shapes of the reflex horn,
the step horn and the spiral horn can also be used. And the horn reproduction | regeneration
band of this invention is used also in a low sound range, a mid range, and a high range. (Effect) It
is possible to provide a horn which is reduced in weight, and reduced in resonance noise specific
to the horn and improved in weather resistance. 4. Brief description of the drawings FIGS. 1 to 3
show first to third embodiments of the horn according to the present invention, and FIGS. 4 and
5 show resonance characteristics of the horn according to the present invention. FIG.
DESCRIPTION OF SYMBOLS 1 иии Compression driver, 2.6.9 A, 9 B и и и Horn, 3.3 A, 3 B иии
Structure, 4, 7.13 и и и Outer surface, 5, 8.1 1 иии inner surface 10: top surface 12: bottom surface
14: hole. Patent applicant: Nippon Victor Co., Ltd. Representative: Dr. Shindo Some and [(? ?,
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