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JP3138044

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DESCRIPTION JP3138044
Abstract: In a speaker box and a speaker device in which a sound path of a horn is formed
around a speaker, it is an object to reduce sound pressure to the speaker and simplify design and
manufacture. A line formed between adjacent squares having the closest size from a planar shape
in which inner walls of a speaker box are arranged in a square shape in which a group of sides
having a large ratio of sides according to a Fibonacci sequence are in spiral contact A speaker
mounting port is formed on the smallest square portion so that the speaker surface can be
mounted in parallel, and the plane shape is formed on the side aligned with one side of the
largest square portion. Form an opening substantially perpendicular to the [Selected figure]
Figure 5
Speaker box and speaker device
[0001]
The present invention relates to a speaker box and a speaker device, and more particularly, to a
speaker box in which a horn function is formed and a speaker device using the same.
[0002]
Conventionally, there is a so-called back load horn type speaker box in which a horn is formed in
the box and one more resonates with bass as described in Patent Document 1 as one type of
speaker box.
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1
The thickness of such a speaker box is generally defined by the outer diameter of the attached
speaker. On the other hand, Mr. Tetsuo Nagaoka has announced a back load horn type speaker
having an internal structure as shown in FIG. This speaker can form a thin speaker system since
the thickness of the speaker box is defined by the thickness of the attached speaker, since the
sound path l is formed around the speaker attachment O position. JP 2003-204586 A
[0003]
However, the speaker box having the structure shown in FIG. 15 has a so-called throat portion in
which the sound path l immediately after the speaker is narrowed. FIG. 16 schematically shows a
linear development of the speaker box shown in FIG. As shown in the figure, the first sound path
from the wall surrounding the speaker to the horn constituting the sound path is the sound path
narrower than the outer diameter of the speaker in the case of the speaker box in FIG. A sound
path narrower than the diameter continues. Thus, the speaker box shown in FIG. 15 has a
problem that the sound pressure to the speaker is high. Moreover, the speaker shown in FIG. 15
increases the width of the sound path 1 by a logarithmic function, and there is also a problem
that it is difficult to design and manufacture. In view of such problems, the present invention has
an object to reduce the sound pressure to the speaker and simplify the design and manufacture
in the speaker box and the speaker device in which the sound path of the horn is formed around
the speaker. Do.
[0004]
In order to solve the above problems, the present invention has the following configuration. The
device according to claim 1 is characterized in that the second square having the same length
side as the side of the first square is adjacent to the first square so that the side is aligned, and is
twice as long as the second square. The third square having sides is in contact with both the first
square and the second square so that the sides are aligned, and N is a natural number of 4 to R
(R is 4 or more), An N-th square having a side having a length obtained by adding the side length
of the (N-1) th square and the length of the (N-2) th square in any N is the N-th square of the (N1) th square. The size is the closest from the planar shape that is aligned with the side opposite to
the side adjacent to the 2 squares and that meets the N-1st square so as not to be adjacent to the
2nd-2 square An inner wall is formed along a spiral planar shape in which line segments formed
between adjacent squares are removed, and a speaker surface is formed on the first square
portion. It is a speaker box in which a speaker attachment port is formed so as to be attached to a
row, and an opening is formed substantially perpendicular to the plane shape on the side aligned
with one side of the third square of the Rth square. . The inner wall in the present application
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includes the inner wall formed by the inner partition plate in addition to the inner wall forming
the outer shape of the speaker box. Note that “adjacent so that the sides are aligned” means
that the sides are in contact with each other so that the sides are in the same straight line.
[0005]
In the device according to the second aspect of the present invention, the second square having ()
5 + 1) / 2 times the side of the first square is adjacent to the first square so that the sides are
aligned, N from 3 Assuming that R (R is 3 or more) is a natural number, an Nth square having a
side of (√5 + 1) / 2 times a side of the N−1th square is an Nth one. From a planar shape that
meets the side adjacent to the N-2th square and faces the N-1th square so as not to be adjacent
to the N-2th square. An inner wall is formed along a spiral planar shape in which a line segment
formed between adjacent squares closest to each other is removed, and the speaker surface is
attached substantially parallel to the first square portion The above-described planar shape is
formed on the side where one side of the R-th square of the R-th square is aligned with the
speaker mounting port being formed. It is a speaker box in which an opening is formed
substantially perpendicular to the shape.
[0006]
The invention according to claim 3 is that in the speaker box, a reflector is provided on at least
one of the inner corner portions of the inner wall.
The inner corner of the inner wall is a portion where the inner wall forms an angle of 90 degrees.
The invention according to claim 4 is the speaker box according to claim 3, wherein the
reflecting plate is provided for each corner portion of all the inner walls and is formed into a
curved surface having a concave surface facing the corner portion. is there. The invention
according to claim 5 is the speaker box according to claims 1 to 3, wherein at least a part of the
inner wall provided along the spiral planar shape has a spiral planar curve inscribed in the planar
shape. The speaker box according to any one of claims 1 to 3, which is replaced with a part of an
inner wall formed along the same. In addition, the spiral plane curve inscribed in the plane shape
refers to a shape formed by smoothly connecting the curves so as to be in contact with points
that become boundaries between the squares that become larger sequentially. The device
according to claim 6 is formed such that the depth of the Nth square portion is equal to or more
than the depth of the square portion of the N-1th square portion with respect to the arbitrary N
in the speaker box. It is a thing.
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[0007]
The invention according to claim 7 is a speaker device in which a speaker is attached to the
speaker mounting port of the speaker box so that the back surface thereof is directed inward.
The invention according to claim 8 is a speaker device in which a speaker is attached to the
speaker attachment port of the speaker box so that the front surface is directed inward.
[0008]
In the device according to the first aspect of the present invention, the planar shape along the
inner wall of the speaker is such that each side is in the order of Fibonacci number sequence (1,
1, 2, 3, 5, 8, 13, 21, ...) Are combined so as to sequentially swirl, and the outer periphery is
necessarily rectangular. The rectangle approaches a rectangular shape with a golden ratio as it
becomes larger. The sound path formed by the inner wall provided along the shape that can be
taken away from the mutually adjacent square partitions in this shape grows sequentially from
the first square, so there is no throat and the sound pressure to the speaker is low. can do.
Specifically, the present speaker box is schematically developed linearly as shown in FIG. The
sound path from the wall surrounding the speaker opening to the horn that constitutes the sound
path is always larger than the outer diameter of the speaker from the beginning, so the sound
path on the back of the speaker is larger than the outer diameter of the speaker. The sound
pressure on the back side is reduced.
[0009]
Also, in designing, it is simple because squares are combined, and also in manufacturing, for
example, it can be formed only by combining boxes whose plane is a square whose sides become
larger in accordance with Fibonacci number sequences. Further, even when the partition is
formed in a box having a rectangular shape in a plan view, the spiral plan shape can be drawn
relatively easily, and the partition may be provided along the spiral plan shape, It can be
manufactured relatively easily. It will be specifically described below that the spiral planar shape
can be drawn relatively easily. The process of drawing a plane shape is shown in FIG. 2 (a)-(j).
First, a rectangular plate is prepared so that the ratio of the long side to the short side is
Fibonacci number sequence. First, as shown in FIG. 2A, a point A1 having a length equal to that
of the short side from one end is marked on the long side. All you need is a writing instrument
such as a string and a pencil for this task. Then, a line segment L1 is drawn at a right angle from
the point A1 as shown in FIG. 2 (b). This is enough if you have a square edge and a cash advance.
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Next, a rectangle having a long side L1 appears, and as shown in FIG. 2 (c), a point A2 having the
same length as the short side of this rectangle is marked from one end on the opposite side of L1.
Then, a line segment L2 is drawn at a right angle from the point A2 as shown in FIG. 2 (d).
Hereinafter, in the same procedure, as shown in FIG. 2 (e) to FIG. 2 (j), sequentially mark as A3,
A4 and A5, and finally a square having the same size as the line segments L3, L4 and L5. Draw
line segments until they are aligned. Above, the line segment which arranges a partition plate can
be drawn. That is, if only the first rectangular shape is drawn, it is not necessary to carry out any
measurement operation with a ruler, and in the case of manufacturing by one-piece
manufacturing in particular, manufacturing operations can be facilitated and work efficiency can
be improved.
[0010]
Further, the case of forming a square having a plane whose size is increased according to the
Fibonacci number sequence by combining box-like bodies whose side faces are appropriately
opened will be specifically described below. The manufacturing process in this case is shown in
order in FIG.3 (a)-(f). First, the square back plate S1 of the first box is prepared. It does not have
to be a square of the correct size, as long as the intended speakers fit inside. Next, as shown to
Fig.3 (a), square back plate S2 of the 2nd box is prepared. This can be easily obtained by copying
the length of one side of S1 with a string or the like. Then, as shown in FIG. 3B, a square box back
plate S3 of the third box whose one side is the long side of the rectangle obtained by connecting
S1 and S2 is prepared. This can also be easily obtained by copying the length of the side with a
string or the like. Furthermore, as shown in FIG. 3C, a square back plate S4 of the fourth box is
prepared, in which the long side of the rectangle obtained by connecting the rectangles obtained
by combining S1 and S2 together is S3. Thereafter, the back plate is prepared in the same
procedure as shown in FIG. 3 (d) to FIG. 3 (e). Again, there is no need to use the ruler to measure
and calculate. Once the back plate is obtained, it is easy to obtain a baffle plate by copying the
shape based on this. Provide speaker mounting holes only in the baffle plate of the first box.
Then, only the first box body is provided with side plates in addition to one side surface, and the
remaining box bodies are provided with side plates in addition to the adjacent two side surfaces.
The width of the side plate may be copied from the back plate with a string or the like, and when
the height is the same height, the height may be copied with a string or the like, so that the side
plate can also be easily obtained. Finally, by connecting the respective box bodies, the speaker
box of the speaker according to the present invention can be obtained. As described above, even
in the case of forming the box body in combination, the operation of measuring the length with a
calculation or a ruler is not necessary at all, and design and manufacture can be performed
extremely easily.
02-05-2019
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[0011]
The device according to claim 2 relates to a planar shape along the inner wall of the speaker, in
which the outer periphery is always golden by combining a square whose side length is increased
by (よ う 5 + 1) / 2 times so as to sequentially wind a vortex. Become a rectangle with a ratio.
Since the sound path formed by the inner wall provided along the shape formed by removing the
mutually adjacent square partitions in this shape also increases sequentially from the first
square, the shape shown in FIG. It can be deployed, there is no throat, and the sound pressure to
the speakers can be lowered. Moreover, also in design, since it combines a square, it is simple,
and it can form also in manufacture only by combining the box which opened the side which
makes the square which becomes large by ((5 + 1) / 2 times a plane shape suitably. Further, even
when the partition is formed in a box having a rectangular shape having a golden ratio in a plane
shape, the above-mentioned spiral plane shape can be drawn relatively easily, and a partition is
provided along the spiral plane shape. It is relatively easy to manufacture because it is sufficient.
In the invention according to claim 2, the method of drawing the spiral planar shape is the same
as that described in claim 1 only in that the rectangular plate to be prepared first has a golden
ratio of the long side to the short side. Are different from each other, and the subsequent work
can be done in the same way, so too little work is required for calculation and lengthening, and it
is formed only by combining boxed bodies with square sides and appropriate side faces. Also in
the case where the smallest part is a rectangular plate having a golden ratio at the short side and
the long side in plan view, except that the back plate and the baffle plate are formed, the square
plate in plan view and the baffle plate are in sequence The combination of the bodies does not
require calculation and measurement in the same manner as in the invention of claim 1, so that
design and manufacture can be easily performed.
[0012]
The invention according to claim 3 is characterized in that the sound pressure of the corner
portion is reduced by providing a reflector on at least one of the inner corner portions of the two
inner walls, and the sound is brought to the opening more smoothly. Can. In the device according
to the fourth aspect of the present invention, since the reflecting plate is provided for each of all
the inner corner portions and is formed into a curved surface having a concave surface facing the
corner portion, the outer side of the sound path has a smooth vortex curve. In addition, the sound
can be brought to the opening smoothly. In the device according to the fifth aspect of the present
invention, the inner wall itself is formed of a curved surface, so that the sound path can be
smoothed and the sound can be smoothly transmitted to the outside. The device according to
claim 6 is formed such that the depth of the Nth square portion is equal to or greater than the
depth of the square portion of the N-1th square portion with respect to the arbitrary N, and the
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width on the depth side is also It can be formed to increase in size as it approaches the opening.
The device according to claim 7 is a speaker device in which a speaker is attached to the speaker
attachment port of the speaker box so that the back surface faces inward, and again, the sound
pressure to the back surface of the speaker is small, and design and manufacture It can be easy.
The device according to claim 8 is a speaker device in which a speaker is attached to the speaker
mounting port of the speaker box so that the front face is directed inward, the sound pressure to
the front face of the speaker is small, and the design and manufacture are easy. can do.
[0013]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings. First Embodiment FIG. 4 shows a perspective view of a speaker apparatus X including
the speaker box A according to the first embodiment. The speaker device X is composed of a
speaker box A and a full-range speaker S including a wire. The speaker box A includes a baffle
plate 11 formed on the front, a back plate 12 formed on the back, side plates 13, 14, 15 and 16
surrounding the side and upper bottom, and a partition plate 17 formed inside Be done. The
length of the side plate in the depth direction is set to a value between 1/2 and 2 times the
aperture of the speaker unit. The cross-sectional view of the speaker box A is shown to Fig.5 (a).
The inner wall of the speaker box A is constituted by the side plates 13, 14, 15, 16 and the
partition plate 17, which are formed on the basis of a shape in which squares of a predetermined
size are arranged according to a predetermined rule.
[0014]
FIG. 5 (b) shows six squares serving as the reference of the inner wall. The first square Q1 and
the second square Q2 are congruent squares, and are disposed in contact with each other such
that the sides completely overlap each other. As a result, the sides adjacent to the contact sides of
the first square Q1 and the second square Q2 are aligned. The third square Q3 is a square whose
one side is the length of the side of the first square Q1 and the side of the second square Q2, and
is equal to each of the first square Q1 and the second square Q2. Contact As a result, two
opposing sides of the third square Q3 are aligned with one side of the first square Q1 and one
side of the second square Q2. The fourth square Q4 is a square having a side having a length
obtained by adding one side of the second square Q2 and one side of the third square Q3, and
the side contacting the first square Q1 and the second square Q2 of the third square Q3. And the
third square Q3 on the side not in contact with the second square Q2. The fifth square Q5 is a
square having a side having a length obtained by adding one side of the third square Q3 and one
side of the fourth square Q4, and the side opposite to the side contacting the third square Q3 of
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the fourth square Q4. It is adjacent to the fourth square Q4 on the side which is flush with and
does not touch the third square Q3. The sixth square Q6 is a square having a side having a length
obtained by adding one side of the fourth square Q4 and one side of the fifth square Q5, and the
side opposite to the side contacting the fourth square Q4 of the fifth square Q5. Adjacent to the
fifth square Q5 on the side not in contact with the fourth square Q4.
[0015]
In other words, the first square Q1 to the sixth square Q6 have so-called fibonacci in which the
side lengths are 1, 1, 2, 3, 5, 8 and the values after the three items are added to the values of the
previous two terms. The first square Q1 to the sixth square Q6 are arranged in a spiral shape
from the inside to the outside. Then, from this shape, the side plates 13 to 16 and the partition
plate 17 along a spiral-shaped figure in which a line segment (indicated by a circle in the figure)
formed between adjacent squares closest to each other in size is removed. The inner wall is
formed by the A speaker attachment port 11a for attaching a speaker is provided on the surface
of the baffle plate 11 of the speaker box A facing the first square Q1 portion, and the speaker S is
attached thereto so that the back side faces the inside of the speaker box. In addition, an opening
14a is formed on the side of the sixth square Q6 that is aligned with the third square, as the
inner wall is not provided. With such a configuration, a back load horn type speaker device X
formed in a spiral shape including a square in which the sound path gradually increases is
formed. In this speaker device X, a sound path is formed on the basis of an arrangement of
squares that gradually increase in size in a spiral shape, so there is no throat and the sound
pressure on the rear side of the speaker is also small. In addition, the first to sixth squares Q1 to
Q6 forming the sound path can be easily drawn on the back plate 12, and the side plates 13 to
16 and the partition plate 17 may be arranged there, so the manufacture is also compared Easy
to do.
[0016]
In addition, the said speaker box can also be formed by combining a square-shaped box body in a
front view. FIG. 6 shows an exploded perspective view of a speaker box A2 formed by combining
such square boxes in a front view, and FIG. 7 shows a perspective view of the speaker box A2.
The speaker box A2 includes the first box body 21, the second box body 22, the third box body
23, and the fourth box body 24 having the first square Q1 to the sixth square Q6 described
above as baffle plates and back plates, respectively. , The fifth box 25 and the sixth box 26. The
baffle plate of the first box body 21 is provided with a speaker mounting hole 21a and one side is
opened. The remaining second box body 22 to sixth box body 26 are open at two adjacent side
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faces. Then, the speaker box A2 is assembled as shown in FIG. 7 by combining the first box body
21 to the sixth box body 26 while connecting the open faces with each other so as to wind
around the first box body 21. You can get it. The manufacture of the speaker box A2 is also
relatively easy because it can be obtained by combining the square boxes in a front view as
appropriate.
[0017]
In addition, a reflector may be provided at an inner corner portion of the sound path formed in
the above speaker box. FIG. 8 (a) shows a flat plate-like reflector 18 provided at the inner corner,
and FIG. 8 (b) shows a reflector having a curved surface having a concave surface facing the
corner at the inner corner. The figure which provided 19 is shown. By providing the reflectors 18
and 19 in this manner, a smoother sound path can be obtained. This sound path approximates a
logarithmic spiral curve. In the case where the reflection plate 18 almost blocks the inner wall as
shown in FIG. 8B, it is possible to configure only the reflection plate 19X as the inner wall as
shown in FIG.
[0018]
Furthermore, in the present embodiment, the baffle plate 11 and the back plate 12 are formed of
flat plate bodies, but the depth may be changed. FIG. 10 shows a perspective view of the speaker
box A3 with the baffle plate 11 down. In this speaker box A3, the depths L1 and L2 of the fifth
square Q5 and the sixth square Q6 are increased. By doing this, the aspect ratio of the opening
14aa can be made close to 1: 1. The area of the baffle plate 11 and the back plate 12 may be
reduced so as not to change the volume from the original state in the portion where the depth is
extended. And in this embodiment, although it forms by six squares which draw the figure of the
vortice shape which becomes the origin of an inner wall, the number of squares can be selected
suitably, and also if the number of squares is increased, Manufacturing is relatively easy.
[0019]
Second Embodiment FIG. 11A shows a cross-sectional view of a speaker device Y including a
speaker box B according to a second embodiment. The speaker box B has substantially the same
configuration as the speaker box A according to the first embodiment, and includes a baffle plate
(not shown) formed on the front, a back plate 32 formed on the back, and side plates 33 and 34
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surrounding the side and upper bottom. , 35, 36, and a partition plate 37 formed inside. The
length of the side plate in the depth direction is also set to a value between 1/2 and 2 times the
aperture of the speaker unit. The difference between the speaker box B and the speaker box A is
that the vortical shape that is the origin of the inner wall is based on a vortice-shaped
arrangement of squares whose sides increase in length by (√5 + 1) / 2 times It is.
[0020]
FIG. 11 (b) shows five squares serving as the reference of the inner wall. First, the rectangle K
constituting the whole is a so-called golden ratio of the ratio of long side to short side of (√5 + 1)
/ 2: 1, the fifth square P5 is a square including the short side of the rectangle K, The portion
excluding K to the fifth square P5 is also a rectangle having the golden ratio again because of the
rectangular nature having the golden ratio. Hereinafter, the fourth square P4, the third square
P3, the second square P2, and the first square P1 are figures obtained by cutting out a square
part from a rectangle having a golden ratio in order to draw a vortex. After cutting out the first
square P1, there still remains a rectangle with a golden ratio, which is not used here. When
viewed from the first square P1, the second square P2 has a side that is (√5 + 1) / 2 times the
side of the first square P1 and is adjacent to the first square P1 so that the sides are aligned. The
third square P3 has a side which is (√5 + 1) / 2 times the side of the second square P2, and is
aligned with the side opposite to the side adjacent to the first square P1 of the second square P2,
and Contact the second square P2 so as not to be adjacent to one square P1. The fourth square
P4 has a side that is (√5 + 1) / 2 times the side of the third square P3 and is aligned with the
side facing the side adjacent to the second square P2 of the third square P3, and Contact the
third square P3 so as not to be adjacent to the two squares P2. The fifth square P5 has a side
that is (√5 + 1) / 2 times the side of the fourth square P4, and is aligned with the side facing the
side adjacent to the third square P3 of the fourth square P4, and Contact the fourth square P4 so
as not to be adjacent to the three squares P3.
[0021]
An inner wall is formed along a spiral shape in which a line segment (indicated by a circle in the
figure) formed between adjacent squares closest to each other in size is removed from the planar
shape formed in this manner. ing. Although the rectangular portion having the golden ratio
adjacent to the first square P1 is covered with the thickened portion 37a of the partition plate
37, it may be provided to surround the partition plate 37 along the rectangular portion. In
addition, a speaker attachment port for attaching a speaker is provided on the surface of the
speaker box B facing the first square P1 portion of the baffle plate (not shown), and the speaker
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is attached so that the back side faces the inside of the speaker box. Further, an opening 34a is
formed on the side of the fifth square P5 which is aligned with the second square, since the inner
wall is not provided. In the speaker apparatus Y including the speaker box B having such a
configuration, the back load horn formed in a spiral shape including a square whose sound path
gradually increases has no throat and has a small sound pressure on the rear side of the speaker.
Become. In addition, since the first to fifth squares P1 to P5 forming the sound path can be easily
drawn on the back plate 2 and the partition plate 17 may be disposed here, the manufacture is
also relatively easy. Can.
[0022]
Moreover, the speaker box B which concerns on Embodiment 2 can be easily formed by
combining the square-shaped box body of a plain view similarly to the speaker box A which
concerns on Embodiment 1. FIG. In addition, an appropriate reflective plate can be provided at an
inner corner portion of the sound path, and only the reflective plate can be configured as an
inner wall. Furthermore, the depth of the speaker box B can also be changed as appropriate.
Furthermore, also in the second embodiment, the number of squares for drawing a spiral figure
as the origin of the inner wall can be appropriately selected, and even if the number of squares is
increased, it is possible to design and manufacture relatively easily. it can.
[0023]
(Example of application) Since the speaker apparatus which has the above composition can be
made thin, various applications are possible. For example, as shown in FIG. 12 (a), the speaker
device Z having a shape close to a book is housed in a bookshelf Bs and drawn out so that the
speaker is exposed at the time of use, FIG. 12 (b1), As shown in (b2), it can be used by being
placed on the front of a bookshelf at the time of use. Further, as shown in FIG. 13A, when used as
a speaker device V for audio of a movie theater or home theater, the speaker does not protrude,
so that a feeling of pressure can be reduced. Furthermore, as shown in FIG. 13 (b), the built-in
speaker W inside the door of a car, and the built-in speaker U of a small device such as a mobile
phone as shown in FIG. 13 (c) It becomes possible to sound more bass.
[0024]
Further, in the above embodiment, the back load horn speaker device is configured, but as shown
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in FIG. 14, the front surface of the speaker Sa1 is attached to the speaker attachment port of the
speaker box C and the speaker box C is used as a front horn It is also possible. In FIG. 14, the
speaker Sa1 attached to the speaker box C is a woofer capable of covering a relatively small size
of about 6000 Hz, and a tweeter is mounted on the top as the high-tone band speaker Sa2 to
constitute a two-way speaker doing. Furthermore, in the above speaker box, while closing the
opening, the speaker mounting port is provided on the baffle plate of the largest square portion
to attach the speaker, and the original speaker mounting port is made an open port, thereby
making the reverse back load horn speaker It is also possible to form.
[0025]
It is a figure which shows the state which expand | deployed the speaker box concerning Claim 1
typically linearly. (A)-(j) is a figure which shows the process of drawing the planar shape for
producing the speaker box which concerns on Claim 1. FIG. (A)-(f) is a figure which shows the
process of combining the box which made the square the plane shape suitably, and opened the
side surface in order to create the speaker box which concerns on Claim 1. FIG. 1 is a perspective
view of a speaker device including a speaker box according to Embodiment 1. FIG. (A) is a crosssectional view of the speaker box based on Embodiment 1, (b) is a figure which shows the square
group used as the reference | standard of the inner wall of the speaker box based on
Embodiment 1. FIG. FIG. 6 is an exploded perspective view of the speaker box in which the
square-fronted box according to Embodiment 1 is combined. It is a perspective view of the
speaker box which combined the box body of square-front view which concerns on Embodiment
1. FIG. (A) and (b) are cross-sectional views of the speaker box according to the first embodiment
showing a state in which a reflecting plate is provided at an inner corner of the inner wall
according to the first embodiment. It is a cross-sectional view which shows the speaker box
which concerns on Embodiment 1 which used only the reflecting plate as the inner wall. It is a
perspective view showing a speaker box concerning Embodiment 1 which changed length of
depth one by one. (A) is a cross-sectional view of the speaker box based on Embodiment 2, (b) is
a figure which shows the square group used as the reference | standard of the inner wall of the
speaker box based on Embodiment 2. FIG. (A) is a perspective view showing a state in which a
speaker device having a size and shape of a book is set in a bookshelf, and (b1) and (b2) are
states in which a speaker device having a size and shape of a book is set on a bookshelf It is a
front view showing. (A) is a front view showing a state of application as an audio speaker device
for a movie theater or the like, (b) is a front view showing a state of application as a car speaker
device, (c) is a built-in small device It is a front view which shows the state applied as a speaker
apparatus. It is a perspective view which shows the speaker apparatus which used the speaker
box as a front horn. It is a cross-sectional view which shows the internal structure of the
conventional back load horn type speaker apparatus. It is the figure which expanded the speaker
box shown in FIG. 15 typically linearly.
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Explanation of sign
[0026]
X, Y, Z, W, U Speaker device A, A2, A3, B, C Speaker box S, Sa1 Speaker 11, 31 Baffle plate 12, 32
Back plate 13, 14, 15, 16, 33, 34, 35, 36 side plate 17, 37 partition plate 18, 19, 19 X reflector
02-05-2019
13
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