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JPS57119592

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DESCRIPTION JPS57119592
Specification 1. Title of invention
Speaker device
8. Detailed Description of the Invention The present invention relates to a speaker apparatus for
reproducing up to the low frequency range with a small volume speaker box. The small volume
speaker box for stereo reproduction is attached to the puff-full board of each speaker box that
reproduces the left and right signals, so a large diameter speaker can not be used and
reproduction of the bass region can not be performed. Even if the speakers of the abovementioned type are used, there is a disadvantage that the space between the speakers is not
sufficient, and the stereo feeling is significantly impaired at the time of stereo signal
reproduction. Generally, when trying to re-star to the low frequency range, measures such as
putting a large-aperture speaker into a large-volume speaker box, or using a phase inversion type
or a patch flyer system are performed. Conventionally, in this type of speaker box such as a
television, as shown in FIG. 1, there has been one in which left and right speakers for
reproducing stereo reproduction are attached to one box. In the figure, (1) is a speaker for
regenerating left and right channel signals, (2) is a box for housing the speaker, and (3) is a
partition plate for making the left and right speakers into a closed box structure. As you know,
the conventional speaker device has a drawback that the volume of the box (2) is small and a
large diameter speaker can not be used and it is difficult to reproduce the low frequency range.
EndPage: The present invention has been made to eliminate the above-mentioned drawbacks of
the prior art. The speaker box is divided into a plurality of chambers by a partition plate, and a
chamber for mounting a loudspeaker and a radiator for reproducing the stutter area is provided.
Providing a speaker device capable of reproducing up to the low frequency without losing the
sense of stereo by providing it! ??? Hereinafter, an embodiment of the present invention will
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be described with reference to the drawings. In FIG. 2, '(Z) is a speaker, (2) is a speaker box, (3) is
a partition plate, (4) is a sound radiator for low range reproduction, (5) is a sound radiator (4 (6)
and (7) are the left and right sides, respectively, the room for storing the channel signal
reproduction speakers, ",," ", (=) ;, (e> is for bass i) Room (4) and its drive speaker (5), ie one
speaker box (2), is divided by 52% from the partition plate (8a) 1 in the longitudinal direction, of
which speakers (4 m), (lb And the chamber on the side of the buffful plate to which the radiator 4
is attached is further divided into five in the left-right direction by the partition plates (8b) and
(8c) to obtain air chambers (6) to (9). In this way, of the two ftf rooms obtained, the leftmost
room (6) and the rightmost room (7) attach the active speakers (la) and (lb) to the respective
baffles to make the left and right channel signals Adjustment is made for low-pitched sound
reproduction that does not have a drive circuit in the baffle plate of the chamber (8) formed by
the partition plates (8b) and (8c) in the middle part of the chambers (6), (7) And a speaker (6) for
driving the radiator and a speaker (6) for driving the radiator are attached to the partition plate
(8a) between the chambers (8) and (9).
In the speaker device of this structure, the bass region is reproduced by vibrating the lead body
in front of the speaker (5) housed in the air chamber (9) to reproduce the bass region. Therefore,
the air room (&) can be used as an acoustic transformer, and the speaker (5) and the radiator (4)
can be easily reproduced in the low frequency range by appropriately changing the metamorphic
ratio and quality ratio of the radiator (4). is there. Furthermore, the left and right speakers (la)
and (lb) having the upper frequency band received by the low band being reproduced by the
winglet (4), as shown in FIG. "It is not necessary to play in the low frequency range, and it is
possible to use a relatively small diameter speaker." In this figure, the solid line is the sound
pressure characteristic according to the present invention, and the broken line is the sound
pressure characteristic of the conventional device. Also, this makes it possible to widen the
speaker spacing (does not greatly impair the stereo feeling. In addition, the low-pitch range
makes one radiator using the property that the sense of direction of sound is hard to sense. In
FIG. 4, the sound pressure characteristics (broken line) when using a speaker having the aperture
of 16 cN in the conventional structure shown in FIG. 1 using the speaker box of the same volume
and the present invention shown in FIG. The sound pressure characteristic (solid line) when using
a speaker with an aperture of t OW and a 250 x 200 wyx radiator with a weight of 26 gr is
shown. As apparent from this, it is understood that the low range is greatly expanded in the
speaker device of the present invention. Further, according to the present invention, since a
speaker with a small diameter can be used, flat sound pressure characteristics can be obtained in
a high-pitched band. In the above embodiment, the speaker box (2) is a rectangular box, but the
shape may be a triangle, a semicircle shown in FIG. 6, a circle or a circle as shown in FIG. Also,
even if the baffle plate has any angle as shown in FIG. 7, the same effect can be obtained, as
shown in FIG. 8. Even if it is a pentagon as shown in FIG. The structure shown also has the
advantage of being able to fit efficiently in the corner of the room to be installed. As described
above, according to the invention of Jin, the inside of the speaker box is divided into appropriate
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sizes by the partition plate, and the low-frequency region reproduction radiator is also provided
at the central portion of the left and right speakers. The left and right speakers can be small in
diameter, and there is an effect that even the bass range can be reproduced without losing the
sense of stereo.
4. Brief Description of the Drawings FIG. 1 is a cross-sectional view showing a conventional ninespeaker loudspeaker apparatus, and FIG. 2 is a cross-sectional view of a loudspeaker apparatus
according to a second embodiment of the present invention. FIG. 8 is a diagram showing a
comparison of the sound pressure characteristics according to the present invention and the
conventional sound pressure characteristics, and FIG. 4 is a diagram of a measurement example
thereof. Fig. 6) force and Fig. 8 are sectional views showing another embodiment of the present
invention. (La, lb) ... speaker, (2) ... speaker box, (8, 8a, 8b, 8c)---partition plate, (4)-= radiator, (5)7 for driving Loudspeaker, (6), (7), (8) s' (9), ииииии Air room, Page и и и и High end Page: 2
characteristics of reproduction speaker, 0 и и и characteristics of radiator (2) ... In the overall
characteristic diagram, the same reference numerals indicate the same or corresponding parts.
Agent Atsushi Nono-Fig.1 Fig.2 Fig.3 EndPage: 3 Fig.7 Fig.8 Procedure amendment (spontaneous)
Patent office director's case display Japanese Patent Application No. 56-661, name of invention
Name of
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