JPS5677196

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DESCRIPTION JPS5677196
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 are a side sectional view and a plan
view showing an embodiment of a speaker apparatus according to the present invention, and
FIGS. 3a and 3b show a modification of the present invention. It is a side sectional view. 11 ......
speaker, 12 ......... speaker, 13 ...... voice coil, 14 ...... coil bobbin 15 ...... cone paper, 16-и и и и и и и и и и и
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и и и и и и и и и и и ... York, 22 ...... magnet, 23 ...... coil bobbin, 24 ... ... voice coil, 25 ... ... cone L26 ииииии
spider, 27
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ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Supports .... Foam, 33 ..... Acoustic lens.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a composite type speaker apparatus in which, for example, a high-tone cone-type speaker is
installed substantially at the center of a low-tone cone-type speaker. Recently, as a multi-way
speaker system, for example, a high-tone speaker is coaxially installed approximately at the
center of a bass speaker, and both speakers are separately driven. Is being developed. On the
other hand, in the case of a cone type speaker, foam is attached to the inside of the cone and
vibration of the cone is emitted as planar vibration to improve the acoustic characteristics.
However, cone type loudspeakers using this foam are all of the single type having one magnetic
circuit and one vibration system, and the composite type as described above has been developed.
Therefore, as described above, there is a strong demand for the development of a composite type
speaker device using two foams. 0 This device is expressed based on the above circumstances,
and the foam is made organic in the composite type speaker An embodiment of the present
invention will be described in detail with reference to the drawings in order to provide a very
good speaker device which can be used to realize a multi-way speaker system with excellent
acoustic characteristics. Do. In FIG. 1 ? 2, 1-1 is a low-frequency cone-type speaker, and a high-
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tone cone-type speaker 2 is coaxially installed at the substantially central portion thereof; 1).
First of all, one end of each of the cone m 15 and the spider 16 is attached to the coil bobbin 14
around which the voice coil 13 is wound. A damper 17 is formed at the other end of the cone
paper 15, and the circumferential side portion of the weir damper 17 is attached to a frame 19+
by an arrow 18. The other end of the spider 16 is also attached to the frame 19. Furthermore, a
magnet 20 is loosely inserted in the coil bobbin 14, and a yoke 21 constituting a magnetic circuit
with the magnet 20 is provided around the voice coil 13. Also, the above-mentioned frame 19.
The magnet 20 and the yoke 21 are both mounted on a pedestal-like magnet 22. Here, the
above-mentioned low-frequency cone-shaped speaker 1 has a coil bobbin 23 through which the
above-mentioned speaker 12 is inserted and the above-mentioned magnet 22 is loosely inserted.
A voice coil 24 is wound around the coil bobbin 23, and one end of each of cone paper 25 and
'(IJ and spider 26 is attached. A damper tr is formed on the other end of the cone paper 25. The
circumferential side of the damper 21 is attached to the frame 29 by the arrow 28 and the other
end of the spider 26 is also attached to the frame 29.
Further, around the voice coil 24 is provided a yoke 30 which forms a magnetic circuit with the
magnet 22. And the said magnet 22. The frame 29 and the coke 30 are both mounted on the
support 31. Here, the cone paper 25 of the above-mentioned low-frequency cone-shaped speaker
1 is made of a foam so that the substantially frusto-like internal portion thereof is enriched
except for the portion provided with the high-f cone-shaped speaker J. For example, an adhesive
or the like is attached (shown by a minute point group in the figure) 32. An acoustic lens 33 is
provided at the upper portion of the foam 32 in the drawing and at a portion facing the cone
paper 15 of the speaker 2. The acoustic lens 33 is square in plan view as shown in FIG. 2, and a
diverging lens is used in this embodiment. Further, according to the above-described speaker
apparatus in which the acoustic lens 33 is configured integrally or separately with the foam body
32, the imaging movement of the cone paper 25 of the speaker 1 is the foam body J2 The sound
is emitted to the front of the speaker through Also, the vibration of the cone paper 15 of the
speaker-2 is radiated as sound to the front of the speaker through the acoustic lens 33. The cone
diaphragm of the speaker 1 is not limited to paper but may be synthetic resin or metal as the
speaker 7, and of course the dome type and flat type etc. may be limited to the cone type as the
speaker 2. Furthermore, not only a diverging lens but also a converging lens may be used as the
acoustic lens 33 as desired. 3 (1) and 3 (b) show a modification of the present invention,
respectively. First, the one shown in FIG. 3 (a) is formed by forming the inner wall surface 32 of
the S foam 32 into a horn shape. Also, the one shown in (b) of the figure is that in which a
sectoral horn is formed inside the foam 32. According to the above construction, the same effect
as the above embodiment can be obtained. . (1) This invention can be carried out by being
modified at will without departing from the scope of the present invention if it is limited to the
above embodiment. Therefore, according to the invention, as described in detail in .mu.F, an
extremely good speaker device capable of realizing acoustic characteristics, 9 excellent multi-way
speaker systems by using foam organically in a ventral type speaker: I can offer you 4. Brief
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description of the drawings. FIGS. 1 and 2 show a speaker device according to the present
invention, and a non-J embodiment, respectively. FIG. 1 is a side sectional view and a plan view,
and 3q (a), (b) are It is a sectional side view which shows the modification of this invention,
respectively. .
1z speaker, 12 speaker, z3 voice coil, 14 coil bobbin, I5 core 1. = 411 ?, ? paper, 16 spider, 2 F
и damper, I 8 и arrow paper, 19-frame, 20 и magnet, 21 и и и w и 22 и magnet, 23 и coil bobbin, 24 и и
Voice coil, 25 cone paper, 26 и и Spider, 27 damper, 28 и и и и и и и и и и и и и и и 30 и и и 3N и и и support
base 32 и и и foam? 3 acoustic lens (, applicant agent patent attorney Suzue Takedo-luster
umbrella ,, 1: ': ?, lKK Chika Aya / 7 ? ?'. 2 hearts // 3,7 <Beta 4 / G I-remains ? ? ? 3, Mi 3
"Enemy back--Noah '0, exchange \ 7 rarity / 6 to, \ s) $ / / ? ? 8 ?, 7 / \, \ X,; / y-? ?, 7 ( NIN
/ '0 \) + j') cN Blue 8 ? ? 2 ? 2-2 U 3 Fig. 3 (a) (b) 232 L ? [77196-'s 37 797 o 2] Applicant
Shibaura Electric Corporation, 45. Appendix f = 1 List of documents (1) Power of attorney l1 (2)
specification '(3) drawing l1 (4) Application Supplementary application 1 copy 6 Iiij other ideas
h1 Heavenly Shinden applicant, proxy agent Address Toranomon 1 Minato-ku, Tokyo-Eye
number 5 No. 17 Mori Bi Heng H Name (8461) Patent Lawyer Muramura (+) Takedo 1 Name
(6881) Patent attorney ? Tsuboi-Gogo ? 1). ??????
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