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DESCRIPTION JPS63207299

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DESCRIPTION JPS63207299
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker system in which a speaker unit having no driver is disposed on the back side of a
speaker cabinet. In the prior art, in general, a speaker unit without a driver, for example a
speaker system with a drone cone, is often arranged with a speaker unit with a driver mounted in
a sealed configuration on the front side of the speaker cabinet. In this case, the speaker cabinet
needs to be provided with a drone cone on the front side and can not be upsized. From such a
thing, in recent years, a speaker unit having a driver is disposed on the front side of the speaker
cabinet in a sealed structure, and a drone cone as a speaker unit having no driver is disposed on
the back side of the speaker cabinet. In this case, the drone cone disposed on the back side of the
speaker cabinet is protected by the speaker grille in the same manner as the speaker unit having
a driver disposed on the front side of the speaker cabinet. Problems to be solved by the invention
However, in the conventional device, the speaker grille provided on the back of the speaker
cabinet is a flat plate, and therefore, when the speaker cabinet is arranged in the window, chest
or the like, the speaker cabinet The back side abuts against the wall surface to block the sound
emitted from the drone cone, and it has a disadvantage that a rich bass feeling can not be
obtained. The present invention solves such conventional drawbacks, and even when arranged in
a window, chest or the like, the sound output from a speaker unit without a driver arranged on
the back of the speaker cabinet is not blocked. It is an object of the present invention to provide a
speaker system capable of reproducing rich bass feeling. SUMMARY OF THE INVENTION In
order to achieve the above object, the speaker system of the present invention is configured to
protect the above speaker unit on the back outer surface of a speaker grille without a driver) tarranged speaker cabinet. It is characterized in that a U-shaped cover having a predetermined
projecting height from the back outer surface and having sound emission holes in the periphery
is attached. According to the present invention, when the speaker cabinet is arranged in the bay
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window, chest or the like by the above-described configuration and the back surface is in contact
with the wall surface, the above-mentioned U-shaped cross section cover back surface only
contacts the wall surface. The sound emission hole provided is not blocked by the wall surface.
Therefore, the sound emitted from the speaker unit not having a driver is emitted without being
blocked from the sound emission hole around the cover having the U-shaped cross section,
thereby reproducing a rich bass feeling. Embodiment Hereinafter, a speaker system of the
present invention will be described with reference to the drawings of the embodiment. 1 and 2
show an embodiment of the present invention. In FIGS. 1 and 2, 1 is a wooden speaker cabinet,
and a plastic front panel 2 is attached by a wood screw 3 on its front surface. A speaker unit 4
for woofer is fixed to the front panel 2 from the inner surface side by a screw not shown, and a
speaker unit 6 for tweeter is fixed from the outer surface side by a screw not shown. A jetty 6 is
projected on the inner surface of the front panel 2 so as to cover the mounting portion of the
speaker unit for the woofer, and the tip of the jetty 6 is sealed by an elastic body provided on the
front of the speaker cabinet 1 By being pressure-contacted with the bush 7, the woofer speaker
unit 4 is attached in a sealed structure in the speaker cabinet 1. Here, the front panel 2 is
attached to the front of the speaker cabinet 1 by the wood screw 3 so that the tip end of the jetty
6 is pressed against the sealing bush 7. 8 is a drone cone disposed on the back of the speaker
cabinet 1 and 9 is a cover for protecting the drone cone 8. The Dronco 78 is attached to the back
of the speaker cabinet 1 by a wood screw 1 o together with the cover 9. The cover 9 is formed to
have a substantially U-shaped cross section, and has a sound emission hole 9 & on the peripheral
wall thereof and also has a sound emission hole 9 b on a wall surface facing the drone cone 8. A
speaker terminal 11 is attached to the back of the speaker cabinet 1 and connected to a speaker
unit 4 for a woofer in the speaker cabinet 1 although not shown. Here, the protruding height of
the cover 9 having a U-shaped cross section from the back outer surface of the speaker cabinet 1
is equal to the protruding height of the speaker terminal 11 from the back outer surface of the
speaker cabinet 1. A reference numeral 12 denotes a speaker grill which can be attached to and
detached from the front panel 2, and a reference numeral 13 denotes a connection line between
the speaker units 4.6. In such a configuration, when the speaker cabinet 1 is disposed in the
window, chest or the like, and the back surface of the cover abuts against the wall surface, the
wall surface of the cover 9 having the sound output hole 9bl and the speaker terminal 11 are the
window glass, chest back wall, etc. The cover 9 has a substantially U-shaped cross section and a
predetermined projecting height so that a gap is formed between the window glass, the chest
back wall and the like, and the cover 9 is provided on the peripheral wall of the cover 9 The
sound hole 9a is not blocked.
Therefore, the sound emitted from the drone cone 8 provided on the back of the speaker cabinet
1 is emitted to the outside for the reproduction of rich bass without being blocked. In the above
embodiment, the protruding height of the speaker terminals 11 provided on the back surface of
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the speaker cabinet 1 is equal to the protruding height of the cover 9, but should be lower than
the protruding height of the cover 9. As a result, when the rear surface of the speaker system
collides with the window glass, the chest back wall, etc., damage to the window glass and damage
to the speaker terminals can be minimized. Effects of the Invention As described above, according
to the present invention, the cross section of the speaker cabinet without the driver disposed on
the back side of the speaker cabinet is protected on the outer surface of the back of the speaker
cabinet and the sound is emitted around the periphery. Since the cover with the hole is attached,
even if there is a barrier such as a glazing or chest back wall on the back side of the speaker
cabinet, a predetermined gap with the barrier can be secured, and always from the back of the
speaker cabinet The sound emission hole can be released to the outside. Therefore, it is possible
to realize a speaker system that performs rich bass feeling reproduction without being blocked
by the sound emission from the back of the speaker cabinet.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a rear view showing an embodiment of a speaker system according to the present
invention, FIG. 2 is an enlarged sectional view of the speaker system, and FIG. 3 is an enlarged
sectional view of an essential part of the speaker system.
1 · · · Speaker cabinet, 4 · · Speaker unit for woofer, 8 · · Drone cone, 9 · · · · · Cover. Figure 1
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