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JP2004297730

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DESCRIPTION JP2004297730
In a speaker device in which a bottom plate of a cabinet is also used as a baffle plate and a bass
speaker 17 is attached downward at its opening, generation of a change in sound quality due to
the installation condition of the speaker device is prevented, and further high The purpose is to
give the design effect of the function. SOLUTION: A transparent reflecting plate 18 made of
acrylic resin is held by supporting legs 23 attached to the bottom surface of a bottom plate 14 of
a cabinet 10, and the reflecting plate 18 is disposed opposite to the lower side of a bass speaker
17. At the same time, the light from the light emitting diode 29 provided on the support leg 23 is
introduced into the reflecting plate 18 to exhibit an illumination effect. [Selected figure] Figure 6
Speaker device
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device, and more particularly to a speaker device in which a speaker body is attached to
an opening of a bottom plate constituting a baffle plate of a cabinet. A speaker device is widely
used as an audio output device for audio equipment or video equipment. In particular, in order to
enhance the sound effect, it is preferable to use a speaker corresponding to each of the high
band, mid band, and low band. In particular, a speaker composed of a low-frequency woofer can
enhance the acoustic effect by reflecting it on the floor surface. Therefore, conventionally, as for
the woofer, a speaker is attached to the opening of the middle plate or bottom plate of the
cabinet, and is it possible to emit sound from the sound emission port formed on the side surface
between the bottom plate and the middle plate under the middle plate? The sound is emitted
from the opening provided in the bottom plate. Patent Document 1: Japanese Patent Application
Laid-Open No. 60-259086 Patent Document 2: Japanese Patent Application Laid-Open No. 200048637 DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The bottom
plate of a cabinet, particularly a woofer that is a speaker for bass, is used. According to the
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structure of being attached to the part of the opening part of the baffle plate which doubles as
well and emitting the sound downward, it is possible to reflect the sound of the low frequency
range on the floor surface and emit it to the side. However, in this case, the reflection of sound
may change depending on the material of the floor surface, the property of the surface, and the
like. In particular, when a carpet or carpet is laid on the floor and the speaker device is mounted
thereon, the sound emitted from the woofer is absorbed by the above carpet or carpet, and the
sound in the low range is not transmitted to the side There is a problem of The present invention
has been made in view of such problems, and in particular, it is an object of the present invention
to provide a speaker apparatus in which sound emitted downward is effectively spread to the
side. . A main invention of the present application is a speaker device in which a speaker body is
attached to an opening of a baffle plate of a cabinet, wherein the baffle plate is constituted of a
bottom plate of the cabinet, and the bottom plate The present invention relates to a speaker
apparatus characterized in that the speaker main body is attached downward to the opening, and
a reflecting plate for reflecting sound from the speaker main body is disposed below the bottom
plate. Here, it is preferable that a support leg is attached to the bottom plate of the cabinet, and
the reflection plate is supported by the side surface of the support leg to form a gap between the
reflection plate and the floor surface. .
Preferably, the cabinet is provided with a duct. According to another main invention of the
present application, a speaker body is attached downward to an opening of a bottom plate of a
cabinet, and a reflector is disposed on the lower side of the bottom plate so as to face the speaker
body, The present invention relates to a speaker apparatus characterized in that a board is
supported by the side surface of a support leg of the cabinet. Here, it is preferable that the
reflecting plate is formed of a transparent or semi-transparent light guide plate, and light from a
light emitting element attached to the side surface of the support leg is incident on the reflecting
plate to illuminate a predetermined position. It is. Further, it is preferable that a predetermined
position on the surface of the reflecting plate is a rough surface, and the rough surface is
illuminated by the light from the light emitting element. Moreover, it is preferable that the rough
surface of the said reflecting plate is comprised from a pear ground. In general, when the woofer
of the speaker is disposed downward on the bottom plate of the cabinet, the sound emitted is
absorbed by the carpet under the condition of the floor surface, particularly in the installation
condition where the carpet and the like are present. Therefore, in order to reflect the sound in
the lateral direction from the lower side, a reflector is provided so as not to change the sound
quality, and the reflector is made of a transparent material and also has an illumination function.
In particular, by fixing the above-mentioned reflecting plate to the support leg and mounting the
light emitting element inside the support leg, it is possible to have a structure which does not
impair the function even in design. BEST MODE FOR CARRYING OUT THE INVENTION The
invention included in the present application will be described below by the embodiments shown
in the drawings. 1 to 5 show the appearance of the speaker device according to the present
embodiment. That is, as is clear from the comparison between FIG. 2 and FIG. 5, this speaker
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device has an elongated rectangular shape with a constant width between the front surface and
the top surface. On the other hand, the back and bottom have a trapezoidal shape. The shape is
completely the same in the case of being placed with the bottom side down and the case of being
placed with the back side down, and has high designability. As shown in FIGS. 1 and 6, a partition
plate 11 is provided on the upper side inside the cabinet 10, and an opening on the front side of
the partition plate 11 is closed by the partition plate 12. The rear side opening is closed by the
rear side partition plate 13 to form a speaker box 15. The bottom of the cabinet 10 is composed
of a bottom plate 14. The speaker box 15 is formed by the partition plates 11, 12, 13 and the
bottom plate 14 as described above.
A circular opening 16 is formed in the bottom plate 14 at the bottom of the speaker box 15, and
a bass speaker 17 composed of a woofer is attached to the circular opening 16 from the lower
side of the bottom plate 14. A reflecting plate 18 is disposed below the bass speaker 17. As
shown in FIGS. 7 and 8, a single support leg 21 is attached to the front side of the cabinet 10 on
the lower side of the cabinet 10 and the lower side of the bottom plate 14, and a pair of supports
on the rear side. Legs 22 are provided. Further, three support legs 23 on the middle side are
provided between the support leg 21 on the front side and the support leg 22 on the rear side.
The reflecting plate 18 is supported by the three support legs 23 on the middle side. The
reflecting plate 18 is made of, for example, a transparent acrylic resin, and the notches 26 are
formed in a portion supported by the support leg 23, and the notches 26 are held by the holding
portion 27 of the support leg 23. It is supposed to be In particular, as shown in FIG. 9, the
support leg 23 has a printed circuit board 28 attached to the inside in the longitudinal direction,
and the light emitting diode 29 mounted on the printed circuit board 28 faces the notch 26 of
the reflector 18. It is supposed to Thus, according to such a configuration, light from the light
emitting diode 29 is introduced into the reflector 28 through the notch 26. Further, a rough
surface 30 is formed at a predetermined position of the reflecting plate 18 as shown in FIGS. The
rough surface 30 is formed of, for example, a pear-ground. The portion other than the rough
surface 30 is mirror finished so that the light from the light emitting diode 29 is totally reflected.
As shown in FIGS. 1 and 4, a chassis 36 is held on the upper side of the speaker box 15 of the
cabinet 10. The chassis 36 holds a pair of printed circuit boards 37 and 38. Here, one printed
circuit board 37 forms a signal circuit, and the other printed circuit board 38 constitutes a power
supply circuit. These chassis 36 are mounted on a mounting plate 40 provided in the cabinet 10.
The rear side portion of the cabinet 10 covers the terminal plate 33 by the rear cover 32 shown
in FIG. 4, thereby closing the rear side opening of the cabinet 10. In the configuration as
described above, as shown in FIG. 6, the low frequency range audio is emitted downward from
the low frequency speaker 17 that constitutes the woofer.
This sound is reflected by the reflection plate 18 disposed on the lower side and guided to the
side. That is, the sound is reflected by the reflection plate 18 without being reflected by the floor
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surface on the lower side of the bass speaker 17. The speaker apparatus including the low-pitch
speaker 17 constitutes a so-called bass reflex type speaker apparatus. That is, a duct 41 is
provided in the speaker box 15 so as to penetrate the bottom plate 14, and the sound wave
emitted rearward from the diaphragm of the speaker 17 is rotated 180 degrees in phase when
passing through the duct 41 by the duct 41. It is made to be in phase with the sound emitted
from the front side of the speaker 17. By using such a reflector 18, the sound from the bass
speaker 17 is not reflected on the floor surface. Therefore, it is not affected by the installation
conditions of the speaker device, in particular, the structure of the floor and its characteristics.
For example, even on a floor surface covered with carpet or carpet, the sound from the speaker
17 is not absorbed by the carpet or carpet, and there is no change in sound quality. Therefore, it
is possible to reliably emit low-range sound without impairing the sound effect. Further, the
reflecting plate 18 is designed to exhibit an illumination effect. That is, in order to light the light
emitting diode 29 mounted in the support leg 23, the light from the light emitting diode 29 is
introduced into the reflecting plate 18 through the notch 26 of the reflecting plate 18 as shown
in FIG. 9A. Here, the reflection plate 18 is made of a transparent material such as acrylic resin,
and the outer surface is mirror-finished, and as described above, at a predetermined position
thereof, for example, a portion near the outer periphery of the upper surface and approximately
the center of the lower surface. Each rough surface 30 is formed as shown in FIG. 9B.
Accordingly, the light emitted from the light emitting diode 29 is totally reflected by the surface
of the reflecting plate 18 as shown in FIG. 9A, and is lighted at the rough surface 30 to generate
light outside. The other light is emitted from the outer peripheral edge of the reflection plate 18
at a position opposite to the notch 26 (see FIG. 8). Therefore, by selecting the light emitting color
of the light emitting diode 29 provided on the printed circuit board 28 of the support leg 23 as
the optimum color, it is possible to generate a high illumination effect, which is extremely high
quality. It is possible to demonstrate the design of the Although the invention included in the
present application has been described above by the illustrated embodiment, the invention
included in the present application is not limited by the above-described embodiment, and is
within the scope of the technical idea of the invention included in the present application.
Various changes are possible.
For example, in the above-mentioned embodiment, although the reflecting plate 18 is comprised
from the acrylic resin which is a transparent material, you may comprise the reflecting plate 18
from a glass plate. Further, various changes can be made to the mounting position or mounting
means of the reflecting plate 18. Also, the arrangement of the rough surface 30 formed thereon
can be arbitrarily changed. According to the main invention of the present application, in the
speaker apparatus in which the speaker main body is attached to the opening of the baffle plate
of the cabinet, the baffle plate is composed of the bottom plate of the cabinet, and the bottom
plate is opened downward. In addition to the speaker main body being attached, a reflector for
reflecting the sound from the speaker main body is disposed on the lower side of the bottom
plate. Therefore, according to such a speaker device, the sound emitted from the speaker main
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body attached to the opening of the baffle plate constituted by the bottom plate is reflected by
the reflector below it and is spread laterally. . In another main invention of the present
application, the speaker body is attached downward to the opening of the bottom plate of the
cabinet, and a reflecting plate is disposed on the lower side of the bottom plate to face the
speaker body, and the reflecting plate Are supported by the sides of the support legs of the
cabinet. Therefore, according to such a speaker device, the sound emitted from the speaker body
attached to the opening of the bottom plate is laterally reflected by the reflection plate.
Therefore, without being influenced by the installation conditions of the speaker device, that is,
the material of the floor surface and its properties, or the presence or absence of a carpet or
carpet, for example, the sound from the speaker main body is absorbed even when carpet or
carpet is present This makes it possible to eliminate the change in sound quality. BRIEF
DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an entire
configuration of a speaker device. FIG. 2 is a plan view of the same speaker device. FIG. 3 is a side
view of the same speaker device. FIG. 4 is a rear view without and with the rear cover on the rear
side of the speaker device installed. FIG. 5 is a front view of the speaker device. 6 is a longitudinal
sectional view of the speaker device, which is a sectional view taken along the line A-A in FIG. 7;
FIG. 7 is a bottom view of the speaker device. FIG. 8 is a bottom view of the speaker device
showing a state of emission of light from the light emitting diode. FIG. 9 is an essential part
longitudinal cross sectional view showing a light emitting operation of the reflecting plate.
Explanation of the code 10. Cabinet, 11. Partition plate (upper side), 12. Partition plate (front
side), 13. Partition plate (rear side), 14. Bottom plate, 15. Speaker box, 16 ... Circular opening 17
17 Loudspeaker (woofer) 18 Reflector 21 Support leg (front side) 22 Support leg (rear side) 23.
Support leg (middle side ), 26 .. notches, 27 .. holding parts, 28 .. printed circuit boards, 29 .. light
emitting diodes, 30 .. rough surface (polished), 32 .. rear cover, 33 .. terminal plate, 36 .. Chassis,
37 .. printed circuit board (signal circuit), 38 .. printed circuit board (power circuit), 40 ..
mounting plate, 41 .. duct
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