U.S. patent application number 10/606350 was filed with the patent office on 2004-02-12 for speaker-provided mounting table.
Invention is credited to Dohi, Hiroyuki, Maekawa, Koji.
Application Number | 20040025755 10/606350 |
Document ID | / |
Family ID | 30437231 |
Filed Date | 2004-02-12 |
United States Patent
Application |
20040025755 |
Kind Code |
A1 |
Maekawa, Koji ; et
al. |
February 12, 2004 |
Speaker-provided mounting table
Abstract
To enhance a lower-band sound with ease, but with almost no
increase in volume and weight, a mounting table provided with a
speaker is provided. This speaker-provided mounting table comprises
a pedestal, a hollow-shaped support member for supporting the
pedestal, and a speaker unit being equipped with the speaker and
being attached on the support member. The support member is
configured to function as an acoustic pipe or an acoustic capacity
as well as supporting the pedestal.
Inventors: |
Maekawa, Koji; (Tendo-shi,
JP) ; Dohi, Hiroyuki; (Tendo-shi, JP) |
Correspondence
Address: |
NIXON & VANDERHYE, PC
1100 N GLEBE ROAD
8TH FLOOR
ARLINGTON
VA
22201-4714
US
|
Family ID: |
30437231 |
Appl. No.: |
10/606350 |
Filed: |
June 26, 2003 |
Current U.S.
Class: |
108/50.11 |
Current CPC
Class: |
H04R 1/026 20130101;
A47B 81/06 20130101 |
Class at
Publication: |
108/50.11 |
International
Class: |
A47B 037/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 9, 2002 |
JP |
P2002-200102 |
Claims
What is claimed is:
1. A speaker-provided mounting table, comprising: a pedestal; a
hollow-shaped support member for supporting the pedestal, the
support member also functioning as an acoustic pipe; and a speaker
unit being equipped with the speaker and being attached on the
support member.
2. The speaker-provided mounting table according to claim 1,
wherein the support member is configured to function as the
acoustic pipe and an acoustic capacity associating with the
acoustic pipe.
3. A speaker-provided mounting table, comprising: a pedestal; a
hollow-shaped support member for supporting the pedestal, the
support member also functioning as an acoustic capacity; and a
speaker unit being equipped with the speaker and being attached on
the support member.
4. The mounting table according to claim 1, wherein the speaker
unit is composed of a dynamic electricity type of speaker.
5. The mounting table according to claim 1, wherein the speaker
unit is composed of a piezoelectric type of speaker.
6. The mounting table according to claim 1, wherein the support
member is provided with an acoustic capacity cavity for emitting
sound generated in response to a resonance caused therein and an
aperture port for outputting the sound emitted by the acoustic
capacity cavity.
7. The mounting table according to claim 1, wherein the support
member is provided with the acoustic pipe for causing a pipe
resonance therein and an aperture port for outputting sound
generated by the pipe resonance.
8. The mounting table according to claim 2, wherein the support
member is provided with both of the acoustic capacity and the
acoustic pipe which causes a resonance therein and an aperture port
for outputting sound generated by the resonance.
9. The mounting table according to claim 3, wherein the support
member has an acoustic capacity to cause a resonance with a
vibration mass of the speaker unit.
10. The mounting table according to claim 6, wherein the support
member is configured to be driven by the speaker unit so that the
support member has a function of, as the resonance, any one of a
Helmholtz resonance, a pipe resonance, and a resonance being caused
on both of the speaker and the acoustic capacity.
11. The mounting table according to claim 6, wherein the
hollow-shaped support member is formed to have a fundamental
frequency to cause a pipe resonance serving as the resonance, the
fundamental frequency being set to a limit to replay a lower-band
sound.
12. The mounting table according to claim 6, wherein the
hollow-shaped support member is formed to have a frequency to cause
a Helmholtz resonance, serving as the resonance, caused by an
acoustic mass inside the support member and an acoustic compliance
of the acoustic capacity, the frequency being set to limit to
replay a lower-band sound.
13. The mounting table according to claim 9, wherein the support
member is formed to have a frequency to cause a resonance caused by
both of an acoustic compliance derived from an acoustic capacity
inside the support member and a vibration mass of eh speaker, the
frequency being set to limit to replay a lower-band sound.
14. The mounting table according to claim 6, wherein a distance
between the speaker unit and the aperture port is determined in
agreement with a resonance frequency necessary for, as the
resonance, either a Helmholtz resonance or a pipe resonance.
15. The mounting table according to claim 1, further comprising a
caster secured on a lower part of the mounting table so that the
mounting table is movable.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a mounting table provided
with a speaker, which is used for mounting various types of
apparatus such as an outputting apparatus required to output audio
signals.
[0003] 2. Description of Related Art
[0004] A conventional mounting table has typically been configured
to have a pedestal and support members for supporting the pedestal.
These support members have been made in a hollow shape.
[0005] In addition, a bass-reflex type of speaker is known as a
speaker that has the capability of enhancing a lower-band sound, in
which sound emitted from the back of the speaker is utilized to
extend a limit to replay a lower-band sound, which provides an
enhanced lower sound band. The bass-reflex type of speaker includes
a speaker and a hollow-shaped port at which a box is placed, the
speaker being incorporated in the box. In this speaker, a resonance
is made to generate at a particular wavelength based on a port
length and a box capacity.
[0006] However, the conventional mounting table has been directed
to a mere multipurpose use. If desired, apparatuses, such as video
apparatuses that output audio signals, can be mounted simply on the
mounting table. Thus, it is concluded that the conventional
mounting table has only a simple function of accepting such
apparatuses to be mounted.
[0007] Meanwhile, it is frequent that the conventional speaker
capable enhancing a lower-band sound has a structure in which its
acoustic capacity could not be increased any more, even if the
acoustic capacity is desired to be larger.
[0008] If the mounting table is equipped with output apparatuses,
such as a speaker, mounted thereon, there occurs the problem that
the capacity and weight of the mounting table increase largely. In
contrast, to avoid this problem, a simply structured output
apparatus whose capacity and weight is suppressed from increasing
could be mounted on the mounting table. There is however another
problem that the capacity of replaying a lower-band sound is not
sufficient.
[0009] The problems to be solved by the present invention include
the above-mentioned problems as examples.
SUMMARY OF THE INVENTION
[0010] The present invention has been made in view of the above
circumstances, and an object of the present invention is,
therefore, to provide a mounting table provided with a speaker,
which is capable of enhancing a lower-band sound with ease, without
substantially increasing the volume and weight of the mounting
table.
[0011] In order to realize the above object, the present invention
provides, as one aspect thereof, a speaker-provided mounting table,
comprising: a pedestal (10); a hollow-shaped support member (20)
for supporting the pedestal, the support member also functioning as
an acoustic pipe; and a speaker unit (26) being equipped with the
speaker and being attached on the support member.
[0012] The present invention provides, as another aspect thereof, a
pedestal (10); a hollow-shaped support member (26) for supporting
the pedestal, the support member also functioning as an acoustic
capacity; and a speaker unit (26) being equipped with the speaker
and being attached on the support member.
[0013] In the above configurations of the present invention, for
the sake of an easier understanding of the present invention, the
references cited in the drawings have been added to each component
in parentheses. However, it should be understood that this manner
of adding the references do not mean to limit the scope of the
present invention to the configurations expressed by the
embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Other objects and aspects of the present invention will
become apparent from the following description and embodiments with
reference to the accompanying drawings in which:
[0015] FIG. 1 shows an external view of a video-apparatus mounting
table serving as a speaker-provided mounting table according to a
first embodiment of the present invention;
[0016] FIG. 2 shows the right side view of the video-apparatus
mounting table shown in FIG. 1;
[0017] FIG. 3 shows a section taken, except a video apparatus,
along an A-A' line in FIG. 2;
[0018] FIG. 4 shows an external view of a video-apparatus mounting
table serving as the speaker-provided mounting table according to a
second embodiment of the present invention;
[0019] FIG. 5 shows the right side view of the video-apparatus
mounting table shown in FIG. 4;
[0020] FIG. 6 shows a section taken, except a video apparatus,
along an A-A' line in FIG. 5;
[0021] FIG. 7 shows an external view of a video-apparatus mounting
table serving as the speaker-provided mounting table according to a
third embodiment of the present invention;
[0022] FIG. 8 shows the right side view of the video-apparatus
mounting table shown in FIG. 7; and
[0023] FIG. 9 shows the rear view of the video-apparatus mounting
table shown in FIG. 7.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0024] Preferred embodiments of a speaker-provided mounting table
according to the present invention will now be described with
reference to FIGS. 1 to 9.
[0025] (First Embodiment)
[0026] Referring to FIGS. 1 to 3, a first embodiment of the
speaker-provided mounting table will now be explained. FIG. 1 shows
an external view of a video-apparatus mounting table 1 according to
the first embodiment, which serves as the speaker-provided mounting
table, FIG. 2 shows the right side view of the video-apparatus
mounting table shown in FIG. 1, and FIG. 3 shows a section taken,
except the video apparatus, along an A-A' line in FIG. 2. For the
sake of making the following explanation easier, a direction along
which the front (shown in FIG. 1) of the video apparatus turns is
referred to as a forward direction, while the opposite direction to
the forward direction is referred to as a backward direction.
[0027] As shown in FIG. 1, the video-apparatus mounting table 1,
which serves as the speaker-provided mounting table according to
the first embodiment, includes a rectangular pedestal 10 and
support members 20 and 25. The pedestal 10 is placed to permit a
video apparatus 5, such as a TV set, to be mounted thereon. The
support members 20 and 25 are provided to support the pedestal at
both the forward and backward portions of the pedestal 10. Each of
the support members 20 and 25 is shaped into a hollow form. The
support members 20 and 25 are disposed at positions on the lower
surface of the pedestal 10 at predetermined intervals in parallel
or obliquely to each other in the backward and forward direction.
In addition, both ends of each of the support members 20 and 25 are
bent at their predetermined middle positions so that both end
surfaces are able to touch the ground.
[0028] In the front or back near to each end of the support member
20, which is secured on the frontal position of the pedestal 10, an
aperture port 21 is formed to allow sound to be emitted outward. In
the present embodiment, an elliptically shaped speaker unit is
chosen, an elliptical opening 22 is formed in the back of the
support member 20. The opening 22 is located so that each distance
from the opening 22 to each aperture port 21 becomes a given amount
(for instance, the same given amount of distance is applied to both
the distances). To the opening 22 is connected one end of a
connection member 24 in which there is formed an acoustic capacity
cavity 23 having a predetermined amount of capacity. The remaining
end of the connection member 24 is coupled with the speaker unit
26. The speaker unit 26 is positioned face to face to the
connection member 24 in the acoustic emitting direction. The
connection member 24 may be solely formed to connect with the
support member 20 or integrally formed with the support member 20,
as long as an acoustic capacity of the acoustic capacity cavity 23
and an acoustic pipe established by the support member 20 operate
in a cooperative manner. The support member 20 may be formed so as
to function as an acoustic capacity.
[0029] The speaker unit 26 is configured by having, for example, an
attaching member 27 to attach a speaker to other members, a speaker
body 28 provided with a vibration plate to emit sound, and an input
terminal 29 to input audio signals to the speaker body 28. The
speaker body 28 is electrically connected to the input terminal 29.
In addition, both of the speaker body 28 and the attaching member
27 are produced as one unit. The speaker unit 26 is secured to the
connection member 24 with the aid of the attaching member 27.
[0030] The speaker unit 26 is made of, for example, a dynamic
electricity type of speaker or a piezoelectric type of speaker.
Employing the dynamic electricity type of speaker makes it possible
to output sound of which frequency range and dynamic range are
wide. Meanwhile, the employment of the piezoelectric type of
speaker will facilitate work to install the speaker onto a mounting
table, because this type of speaker occupies a remarkably reduced
amount of volume. Additionally, this employment allows the entire
weight of the mounting table, including the speaker, to be reduced
to a great extent.
[0031] The input terminal 29 of the speaker body 28 is electrically
coupled with, for example, the output terminal of a video apparatus
5, such as a TV set or others, which is mounted on the pedestal 10,
so that the input terminal 29 receives an output signal from the
vide apparatus 5. Since this input terminal 29 is placed to receive
audio signals, the input terminal 29 is not always limited to
connections with the video apparatus. 5, but may be connected to
audio apparatuses.
[0032] The aperture ports 21 and 21 are positioned in the support
member 20 such that a frequency to cause a Helmholtz resonance can
be set to a limit necessary to replay a lower-band sound, the
Helmholtz resonance being caused on both of an acoustic mass inside
(within the acoustic pipe) the support member 20 and an acoustic
compliance from the acoustic capacity cavity 23 functioning as an
acoustic capacity cavity. In cases where the video-apparatus
mounting table 1 is used as means for generating a pipe resonance,
the aperture openings 21 are formed at specific positions where the
distance between the speaker unit 26 and each aperture port 21 is
determined to have a resonance frequency necessary for the pipe
resonance.
[0033] An operation, which is given when the video-apparatus
mounting table according to the present embodiment is made to
function as an acoustic apparatus, will now be provided.
[0034] In response to the supply of an audio signal from the vide
apparatus 5 to the input terminal 29 of the speaker unit 26, the
sound that has been replayed are emitted from the speaker unit 26.
The emitted sound undergoes a resonance caused on the internal
lengths of the acoustic capacity cavity 23 and the support member
20, the resonated sound is transmitted to the aperture ports 21 and
21. The replayed sound is therefore emitted outward via the
aperture ports 21 and 21.
[0035] As described above, the video-apparatus mounting table 1
according to the present embodiment is provided with the
hollow-shaped support members 20 and 25, which have been generally
used as a structure typical to a multipurpose mounting table.
Additionally, one of the support members, 20, is provided with the
speaker unit 26 in order to use the support member 20 as an
acoustic pipe. Moreover, the support member 20 (including the
acoustic capacity cavity 23) is made to operate as means for a
Helmholtz resonance or a pipe resonance on audio signals.
Alternatively, the support member 20 is used as means for providing
an acoustic capacity.
[0036] Therefore, the video-apparatus mounting table 1 is available
as a speaker that is compact in size has a sufficiently high replay
function for a lower-band sound. Specifically, the support member
can be used as an acoustic pipe or a member that provides an
acoustic capacity, which will eliminate the necessity of increasing
the volume and weight of the mounting table. Still, the support
member and the others are formed to produce a Helmholtz resonance,
thereby particularly providing an increased efficiency in a lower
band of sound and remarkably improving quality of replayed
sound.
[0037] (Second Embodiment)
[0038] Referring to FIGS. 4 to 6, a second embodiment of the
speaker-provided mounting table will now be explained. FIG. 4 shows
an external view of a video-apparatus mounting table 50 according
to the second embodiment, which serves as the speaker-provided
mounting table, FIG. 5 shows the right side view of the
video-apparatus mounting table shown in FIG. 4, and FIG. 6 shows a
section taken, except the video apparatus, along an A-A' line in
FIG. 5. Similarly to the first embodiment, for the sake of making
the following explanation easier, a forward direction and a
backward direction are defined on the direction going away from the
front or back of the vide apparatus. Incidentally, the constituents
that have already been explained in the first embodiment are noted
by the references identical to those in the first embodiment, thus
being omitted from detailed explanations.
[0039] As shown in FIG. 4, the video-apparatus mounting table 50,
which serves as the speaker-provided mounting table according to
the second embodiment, includes a rectangular pedestal 10 and
support members 60 and 65. The pedestal 10 is placed to permit a
video apparatus 5 to be mounted thereon. The support members 60 and
65 are provided to support the pedestal 10 at both the forward and
backward parts of the pedestal 10. Each of the support members 60
and 65 is shaped into a hollow tube. The support members 60 and 65
are disposed at positions on the lower surface of the pedestal 10
at predetermined intervals in parallel or obliquely to each other
in the backward and forward direction. In addition, both the
support members 60 and 65 are bent at their predetermined middle
positions to form rectangles, respectively. In addition, inside the
support member 60 secured at a position near to the front on the
lower surface of the pedestal 10, two partition walls 70 are placed
to partition its inner space into first and second ports. The first
and second ports are partitioned to have capacities obtained by
dividing the inner capacity of the support member 60 at a given
ratio. In the present embodiment, the speaker unit 26 is produced
into a circular form, resulting in that circular openings 22 and
22a are formed in the back of the support member 60 and belong to
the first and second ports, respectively. The openings 22 and 22a
are positioned in the first and second ports so that a distance
from each of the openings 22 and 22a to each of later-described
aperture ports 61 to 61a shows a predetermined amount (for example,
both distances are equal to each other). Because the inner capacity
of the support member 60 is partitioned by the two partition walls
70 into the two chambers, those chambers can be resonated at
frequencies mutually slightly different from each other.
[0040] In the front or back near to each of both ends of the
support member 60 that functions as the first and second ports,
rectangular aperture ports 61 and 61a are formed to allow sound to
be emitted outward, respectively. Each of the aperture ports 61 and
61a is opened at a position in the vicinity of one end of each of
the first and second ports. To each of the openings 22 and 22a is
connected one end of each of connection members 64 and 64a in each
of which there is formed an acoustic capacity cavity 63 (63a)
having a predetermined amount of capacity. The remaining end of
each of the connection members 64 and 64a is coupled with each of
the speaker units 26. Each speaker unit 26 is positioned face to
face to each of the connection members 64 and 64a in the acoustic
emitting direction. Each of the connection members 64 and 64a may
be solely formed to connect with the support member 60 or
integrally formed with the support member 60.
[0041] Each of the aperture ports 61 and 61a is positioned so that
a frequency to cause a Helmholtz resonance can be set to a limit
necessary to replay a lower-band sound, the Helmholtz resonance
being caused on both of an acoustic mass inside the acoustic pipe
and an acoustic compliance from each of the acoustic capacity
cavities 63 and 63a each functioning as an acoustic capacity part.
In cases where the video-apparatus mounting table 50 is used as
means for generating a pipe resonance, the aperture openings 61 and
61a are formed at specific positions where the distance between
each speaker unit 26 and each aperture port 61 (61a) is determined
to have a resonance frequency necessary for the pipe resonance.
[0042] An operation, which is given when the video-apparatus
mounting table according to the present embodiment is made to
function as an acoustic apparatus, will now be provided.
[0043] In response to the supply of an audio signal from the vide
apparatus 5 to the input terminal 29 of each speaker unit 26, the
sound that has been replayed are emitted from each speaker unit 26.
The emitted sound undergoes a resonance caused by both the acoustic
capacity cavity 23 and the acoustic pipe 60, the resonated sound is
transmitted to each of the aperture ports 61 and 61a. The replayed
sound is therefore emitted outward via each of the aperture ports
61 and 61a.
[0044] As described above, the video-apparatus mounting table 50
according to the present embodiment is provided with the
hollow-shaped support members 60 and 65, which have been generally
used as a structure typical to a multipurpose mounting table.
Additionally, one of the support members, 60, is provided with the
speaker unit 26 in order to use the support member 60 as an
acoustic pipe. Moreover, the support member 60 (including the
acoustic capacity cavity 23) is made to operate as means for a
Helmholtz resonance or a pipe resonance on audio signals.
Furthermore, the inside cavity of the support member 60 is
partitioned into the first and second ports, while each of the two
connection members 64 and 64a and each of the two speaker units 26
are disposed to act on each of the first and second ports,
independently of each other between both the systems.
[0045] Therefore, the video-apparatus mounting table 50 is
available as a speaker that is compact in size has a sufficiently
high replay function for lower-band sound. Specifically, the
support member can be used as an acoustic pipe or a member that
provides an acoustic capacity, which will eliminate the necessity
of increasing the volume and weight of the mounting table. Still,
the support member and the others are formed to produce a Helmholtz
resonance, thereby particularly providing an increased efficiency
in a lower band of sound and remarkably improving quality of
replayed sound. Furthermore, a plurality of speaker units 26 are
placed and the sound emitted from the individual speaker units 26
is emitted via the separate aperture ports 61 and 61a, which
therefore makes it possible to perform a stereophonic replay.
[0046] (Third Embodiment)
[0047] Referring to FIGS. 7 to 9, a third embodiment of the
speaker-provided mounting table will now be explained. FIG. 7 shows
an external view of a video-apparatus mounting table 100 according
to the third embodiment, FIG. 8 shows the right side view of the
video-apparatus mounting table shown in FIG. 7, and FIG. 9 shows
the rear view of the video-apparatus mounting table shown in FIG.
7. Similarly to the first and second embodiments, for the sake of
making the following explanation easier, a forward direction and a
backward direction are defined on the direction going away from the
front or back of the vide apparatus shown in FIG. 7.
[0048] As shown in FIG. 7, the video-apparatus mounting table 100,
which serves as the speaker-provided mounting table according to
the third embodiment, includes a rectangular pedestal 110, support
members 120 and 125, and four casters 130 for movements. The
pedestal 110 is placed on which a video apparatus 5 is mounted. The
support members 120 and 125 are in charge of supporting the video
apparatus 5 perpendicularly mounted on the pedestal 110. On the
four corners of the outer bottom of the pedestal 110 are secured
the four casters 130, respectively. Each of the support members 120
and 125 is shaped into a hollow tube. The support members 120 and
125 are perpendicularly built on the pedestal 110 at specific
intervals in parallel or obliquely to each other.
[0049] A mechanism for detachably holding the video apparatus 5 is
placed on upper frontal parts of the support members 120 and 125.
Hence the video apparatus 5 can be mounted onto or removed from the
upper frontal part of the support member 120 and 125. In the
support members 120 and 125 are opened, respectively, aperture
ports 121 and 126 to emit sound therefrom. In addition, in an upper
side of each of the support members 120 and 125 (in this
embodiment, the upper sides that face to each other), openings 122
and 127 are formed respectively. The opening 122 and 127 are
positioned so that a predetermined distance is secured from each of
the openings 122 and 127 to each of the aperture ports 121 and 126.
For instance, such distance is determined to be equal between one
route from the opening 122 to the aperture port 121 and the other
route from the opening 127 to the aperture port 126. To each of the
openings 122 and 127 is connected one end of each of connection
members 124 and 129 in each of which there is formed an acoustic
capacity cavity 123 (128) having a predetermined amount of
capacity. The remaining end of each of the connection members 124
and 129 is coupled with each of the two separate speaker units 26.
Each speaker unit 26 is positioned face to face to each of the
connection members 124 and 129 in the acoustic emitting direction.
Each of the connection members 124 and 129 may be solely formed to
connect with each of the support members 120 and 125, or integrally
formed with each of the support members 120 and 125.
[0050] Each of the aperture ports 121 and 126 is positioned in each
of the support members 120 and 125 such that a frequency to cause a
Helmholtz resonance can be set to a limit necessary to replay a
lower-band sound, the Helmholtz resonance being caused on both of
an acoustic mass inside each of the support members 120 and 125 and
an acoustic compliance from each of the acoustic capacity cavities
123 and 128. In cases where the video-apparatus mounting table 100
is used as means for generating a pipe resonance, each of the
aperture openings 121 and 126 is formed at a specific position
where the distance between each speaker unit 26 and each of the
aperture port 121 and 126 is determined to have a resonance
frequency necessary for the pipe resonance.
[0051] An operation, which is given when the video-apparatus
mounting table according to the present embodiment is made to
function as an acoustic apparatus, will now be provided.
[0052] In response to the supply of an audio signal from the vide
apparatus 5 to the input terminal 29 of each speaker unit 26, the
sound that has been replayed is emitted from each speaker unit 26.
The emitted sound undergoes a resonance caused by each of the
acoustic capacity cavity 123 and 128 and an internal acoustic mass
of each of the support members 120 and 125, the replayed sound that
has experienced the resonance is transmitted to each of the
aperture ports 121 and 126. The replayed sound is therefore emitted
outward via each of the aperture ports 121 and 126.
[0053] As described above, the video-apparatus mounting table 100
according to the present embodiment is provided with the
hollow-shaped support members 120 and 125, which have been
generally used as a structure typical to a multipurpose mounting
table. Additionally, each of the support members 120 and 125 is
provided with the speaker unit 26 in order to use the support
member 120 (125) as an acoustic pipe. Moreover, the support members
120 and 125 (including the connection members 124 and 129,
respectively) are made to operate as means for a Helmholtz
resonance or a pipe resonance on audio signals.
[0054] Therefore, the video-apparatus mounting table 100 is
available as a speaker that is compact in size has a sufficiently
high replay function for a lower-band sound. Specifically, the
support members can be used as acoustic pipes or members for
providing an acoustic capacity, which will eliminate the necessity
of increasing the volume and weight of the mounting table. Still,
the support members and the others are formed to produce a
Helmholtz resonance, thereby particularly increasing efficiency in
a lower band of sound and remarkably improving quality of replayed
sound.
[0055] As described so far, the speaker-provided mounting table
according to the present invention comprises, as shown in FIG. 1, a
pedestal 10; hollow-shaped support members 20 and 25 for supporting
the pedestal 10; and a speaker unit 26 being equipped with the
speaker and being attached on the support member 20, wherein the
support member 20 is configured to be used as an acoustic pipe.
[0056] Accordingly, a hollow-shaped support member, which has been
in general use as a structure for a multipurpose mounting table can
be utilized to secure a speaker to the support member. This
utilization makes it possible to use he support member as an
acoustic pipe as well. Hence, with almost no increase in the volume
and weight of the mounting table, a speaker-provided mounting table
is realized, without lowering the strength of the mounting table.
Further, since the Helmholtz resonance can be provided by the use
of the hollow pipe and others, efficiency in emitting a lower-band
sound is enhanced in particular and sound quality is also
upgraded.
[0057] Further, the speaker unit 26 uses a dynamic electricity type
of speaker or a piezoelectric type of speaker.
[0058] Hence, to use the dynamic electricity type of speaker
enables the output of sound of which dynamic range is wider. Using
the piezoelectric type of speaker, only a remarkably small amount
of volume is occupied by the speaker, which makes it easier to
install the speaker onto the mounting table. Additionally, the
entire weight of the mounting table can be reduced noticeably.
[0059] The support member 20 is provided with an acoustic capacity
cavity 23 for causing a resonance together with an inner acoustic
mass of the support member 20 and aperture ports 21 for emitting
the sound caused by the acoustic capacity cavity 23.
[0060] This enables use of, an acoustic pipe, a hollow-shaped
support member that has been generally used as a structure for a
multipurpose mounting table.
[0061] Moreover, the support member 20 is configured to respond to
an audio signal inputted to the input terminal 29 of the speaker
unit 26 so that the support member 20 has a function of performing
a Helmholtz resonance or a pipe resonance.
[0062] This construction causes the support member to operate as
means for performing the Helmholtz resonance or the pipe resonance.
It is therefore possible to raise sound quality to a great degree,
compared to that obtained when the speaker is driven alone. Still,
the Helmholtz resonance is provided by the use of the hollow pipe
and others, so that efficiency in emitting a lower-band sound can
be enhanced in particular, and sound quality can also be
upgraded.
[0063] By the acoustic capacity cavity 23 and the aperture ports 21
and 21, a frequency to cause a Helmholtz resonance can be set to a
limit necessary to replay a lower-band sound, the Helmholtz
resonance being caused on both of an acoustic mass inside the
support member 20 (within the acoustic pipe) and an acoustic
compliance from the acoustic capacity cavity 23 functioning as an
acoustic capacity part. The thus-set frequency is given to the
support member 20.
[0064] Accordingly, a frequency to cause the Helmholtz resonance
can be set to a limit necessary to replay a lower-band sound, which
allows the lower-band sound to be enhanced.
[0065] Furthermore, a distance between the speaker unit 26 and each
of the aperture ports 21 is determined in agreement with a
resonance frequency necessary for either a Helmholtz resonance or a
pipe resonance.
[0066] Thus, this construction causes the support member to operate
as means for performing the Helmholtz resonance or the pipe
resonance. It is therefore possible to raise sound quality to a
great degree, compared to that obtained when the speaker is driven
alone. Still, the Helmholtz resonance is provided by the use of the
support member and others, so that efficiency in emitting a
lower-band sound can be enhanced in particular, and sound quality
can also be upgraded.
[0067] Still, as shown in FIG. 7, the speaker-provided mounting
talbe 100 is provided a plurality of casters 130 to allow the
mounting table 100 to be movable on the ground.
[0068] It is therefore possible to move the speaker-provided
mounting table with ease.
[0069] As mentioned above, the foregoing embodiments employ the
configuration in which there is provided a pedestal; a
hollow-shaped support member for supporting the pedestal; and a
speaker unit being equipped with the speaker and being attached on
the support member, wherein the support member is configured to
function as either an acoustic pipe or an acoustic capacity. The
lower-band sound can therefore be enhanced for emission in an
easier manner, with almost no increase in the volume and weight of
the mounting table (for instance, the video-apparatus mounting
tables 1, 50 and 100).
[0070] The present invention may be embodied in other specific
forms without departing from the spirit or essential
characteristics thereof. The above embodiments and modifications
are therefore to be considered in all respects as illustrative and
not restrictive, the scope of the present invention being indicated
by the appended claims rather than by the foregoing description and
all changes which come within the meaning and range of equivalency
of the claims are therefore intended to be embraced therein.
[0071] By way of example, the aperture port opened at a specified
position on a surface of the support member may be rectangular,
circular, or any other arbitrarily selected shape. Similarly, the
outer shapes of the support members, connection members, speakers,
and/or others may be modified freely.
[0072] Sill a further modification is that both ends of the support
member are charged with a sound absorbing material and closed to
produce a closed box state. As a result, the inner cavity of the
support member can be used as a back chamber (cabinet) for a
speaker.
[0073] Through the foregoing various types of embodiments, the
present invention can therefore be summarized such that a
hollow-shaped support member is additionally in charge of a pipe
resonance, both an acoustic mass inside a hollow-shaped support
member and an acoustic capacity cavity of a member other than such
support member are responsible for generation of a Helmholtz
resonance, and the inner capacity of a hollow-shaped support member
is used as a back chamber (cabinet) for the speaker.
[0074] The entire disclosure of Japanese Patent Application No.
2002-200102 filed on Jul. 9, 2002 including the specification,
claims, drawings and summary is incorporated herein by reference in
its entirety.
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