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JP2007259244

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DESCRIPTION JP2007259244
PROBLEM TO BE SOLVED: To emit light over the entire area of a diaphragm of a speaker.
SOLUTION: A diaphragm 18 of the speaker 1 is made of translucent synthetic resin, and a light
diffusion pattern is provided on at least one side. Behind the diaphragm 18, a multicolor LED 17
is annularly disposed along the outer periphery of the damper 14. When the multicolor LED 17 is
turned on, its light is diffused by the light diffusion pattern as it passes through the diaphragm
18. Therefore, almost the entire area of the diaphragm 18 can be used for the decoration effect
by light emission. By making the multi-color LEDs 17 arranged in an annular shape sequentially
emit light cyclically or change color, etc., the effect of diffusion can be changed to achieve a wide
light effect. Since the outer peripheral portion of the damper 14 has not been used
conventionally, it is not necessary to create a new space for the multicolor LED 17. [Selected
figure] Figure 1
スピーカ
[0001]
The invention belongs to the technical field of loudspeakers.
[0002]
There is a technique of mounting a light emitter on a speaker to obtain an electric decoration
effect.
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For example, Japanese Patent Application Laid-Open No. 2001-95074 discloses a speaker in
which light emitted from a light source is irradiated to a center cap mounted at the center of a
diaphragm and diffused by satin or the like provided on the inner surface thereof. JP 2001197579 A
[0003]
However, the visual effect is limited because the speaker described in Patent Document 1 emits
light only at the center.
[0004]
The speaker according to claim 1 comprises a diaphragm made of translucent synthetic resin and
provided with a light diffusion pattern on at least one side, and a light emitting element annularly
disposed behind the diaphragm. It is characterized by
[0005]
In this speaker, light emitting elements are annularly arranged behind the diaphragm, and light
emitted from the light emitting elements is diffused and emitted by a light diffusion pattern
provided on the diaphragm.
Therefore, almost the entire area of the diaphragm can be used for the decoration effect by light
emission.
[0006]
Since the light emitted from the light emitting element is diffused when passing through the
diaphragm, the entire surface of the diaphragm can be illuminated even if the number of light
emitting elements, that is, light sources, is small.
The diaphragm may be made of a translucent synthetic resin, for example, a sheet of
polycarbonate, polyethylene, acrylic, or PET. The light transmitting property may be transparent
or semi-transparent. If it is transparent, the diaphragm emits light brightly, and if it is
translucent, it emits soft light. In addition, the translucent synthetic resin may be colored with a
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dye or a pigment.
[0007]
As the light emitting element, an LED, an inorganic EL, an organic EL or the like can be used. It is
also possible to produce effects such as changing the light emission color using a multicolor LED
or the like, and turning on and off a plurality of light emitting elements sequentially.
[0008]
The arrangement of the light emitting elements may be annular, and the distance is not
particularly limited. Alternatively, a ring-shaped EL may be used. The mounting position of the
light emitting element need only be behind the diaphragm, but is preferably arranged along the
outer periphery of the damper supporting the voice coil according to claim 2. More specifically,
an annular flat portion is provided in the frame of the speaker for fixing the outer edge of the
damper, and an appropriate space is provided on the outside of the damper. Therefore, if the
light emitting element is disposed in this portion Good.
[0009]
The light diffusion pattern can be provided by minute bumps or dips. For example, a pattern in
which a large number of linear ridges are arranged in parallel, a pattern in which a large number
of linear ridges are arranged in a lattice, a pattern in which a convex in the diagonal direction is
further added to this lattice pattern, a circle, an ellipse For example, it is possible to exemplify a
pattern repeating a basic pattern configured by arranging polygons (triangles, quadrilaterals,
hexagons, etc.) and other figures (star, diamond, etc.) concentrically. The same pattern may be
formed by a recessed line. In addition, patterns other than those exemplified here may be used.
[0010]
When the light diffusion pattern is formed by the ridges or grooves, the linear density (the
number per unit length along the width direction of the ridges or grooves) is 1/1 mm or more (1
mm or less). preferable. For example, it can be made to 2/1 mm (0.5 mm pitch), 4/1 mm (0.25
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mm pitch), 8/1 mm or more (0.125 mm pitch), 10/1 mm (0.1 mm pitch), etc. The linear density
may be further increased.
[0011]
Such a light diffusion pattern can be provided by pressing on a translucent synthetic resin sheet.
The light diffusion pattern may be provided on only one side of the diaphragm as in the third
aspect, or may be provided on both sides of the diaphragm as in the fourth aspect. If a good
acoustic effect is expected, it may be provided on only one side, and if it is provided on both
sides, the optical characteristics will be improved.
[0012]
When the light diffusion patterns are provided on both sides of the diaphragm, the light diffusion
patterns may be the same on both sides, but if the respective patterns are made different, the
aspect of diffusion becomes rich.
[0013]
Next, embodiments of the present invention will be described by way of examples of the present
invention.
It is needless to say that the present invention is not limited to the following examples and the
like, and can be variously implemented without departing from the scope of the present
invention. Embodiment As shown in FIG. 1, the speaker 1 of this embodiment is configured to
support each part by a frame 3 which is a skeleton. Further, the front end of the frame 3 is a
square flange 4, and the speaker 1 can be fixed using the hole 5 provided in the flange 4. The
speaker 1 of this embodiment is attached to, for example, a front frame of a game machine and
used, but the application is not limited to this and can be used widely.
[0014]
The rear wall 7 of the frame 3 is disk-shaped having a wall hole 9, and a magnet 10 is attached
to the back surface 7a. The central hole 11 of the magnet 10 is coaxial with the wall hole 9 and is
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in series as shown.
[0015]
A bobbin 13 is disposed through the wall hole 9 and the center hole 11. A voice coil 12 is wound
around the outer periphery of the bobbin 13 so as to face the center hole 11 of the magnet 10.
Further, the inner peripheral portion of the damper 14 is connected to the outer periphery of the
bobbin 13, and the outer peripheral portion of the damper 14 is fixed to the front surface 7 b of
the rear wall 7. That is, the bobbin 13 is supported by the frame 3 (rear wall 7) via the damper
14, coaxial with the wall hole 9 and the central hole 11, and not in contact with them, and is
displaceable in the axial direction.
[0016]
In addition, an annular printed board 15 along the outer periphery of the damper 14 is attached
to the front surface 7 b of the rear wall 7. A plurality of (12 in this embodiment) multicolor LEDs
17 are mounted on the printed circuit board 15 at equal intervals.
[0017]
The rear end of the diaphragm 18 is connected to the front end of the bobbin 13. The outer
peripheral portion of the edge 19 of the diaphragm 18 is fixed to the frame 3 by a ring 21. A
center cap 22 for covering the opening of the bobbin 13 is attached to the inside of the
diaphragm 18.
[0018]
With such a structure, if a signal current is supplied to the voice coil 12, the diaphragm 18 can
be vibrated through the bobbin 13 around which the voice coil 12 is wound to generate sound.
By the way, although this diaphragm 18 is what shape ¦ molded sheets of translucent synthetic
resin, for example, polycarbonate, polyethylene, an acryl, PET, etc. in cone shape, it is illustrated
in FIGS. Light diffusion patterns are provided.
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[0019]
The light diffusion pattern shown in FIG. 2 has a structure in which linear ridges are arranged in
a vertical, horizontal or diagonal lattice, and the light diffusion pattern shown in FIG. 3 has a
structure in which linear ridges are arranged in parallel, The light diffusion pattern shown in No.
4 has a structure in which a basic pattern in which ridges are arranged in large and small
concentric circles is repeated. Further, FIG. 5 shows an example of the cross-sectional shape of
the ridges constituting the light diffusion pattern, and can be a triangle (a, b), a trapezoid (c, d),
an arc (e) or the like.
[0020]
Therefore, when the multicolor LEDs 17 are turned on, the light emitted from them is diffused
and emitted by the light diffusion pattern provided on the diaphragm 18. Therefore, almost the
entire area of the diaphragm 18 can be used for the decoration effect by light emission.
[0021]
Further, since the diaphragm 18 is formed by forming a sheet provided with the light diffusion
pattern in a cone shape, distortion is generated in the light diffusion pattern along with the
formation. Due to this distortion, for example, the flat sheet provided with the light diffusion
pattern was irradiated with light, for example, the luminance was changed at the central portion
(bobbin 13 side) and the outer peripheral portion (edge 19 side) of the diaphragm 18. The
patterns of diffusion are more varied than sometimes.
[0022]
The light emitted from the multicolor LED 17 is diffused when passing through the diaphragm
18, so that the entire surface of the diaphragm 18 can be illuminated even if the number of
multicolor LEDs 17 is smaller than the light emitting area of the diaphragm 18. .
[0023]
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In addition, it is possible to change the diffusion effect by making the multi-color LEDs 17
arranged in an annular shape sequentially emit light cyclically, to change color, etc., so that a
wide light effect is possible.
The multicolor LED 17 is disposed along the outer periphery of the damper 14 supporting the
voice coil 12, but the portion occupied by the printed circuit board in the front surface 7b of the
rear wall 7 (portion outside the damper 14) is a conventional speaker Since it is a part which was
not used in the above, it is not necessary to create a new space in order to equip the speaker 1
with the multi-color LED 17 (printed circuit board 15), and the speaker 1 is not upsized.
[0024]
The front view (a), longitudinal cross-sectional view (b), side view (c), and rear view (d) of the
speaker of an Example. The illustration (1) of the light-diffusion pattern provided in a diaphragm
in the speaker of an Example. The illustration (2) of the light-diffusion pattern provided in a
diaphragm in the speaker of an Example. The illustration (3) of the light-diffusion pattern
provided in a diaphragm in the speaker of an Example. The shape illustration figure of the convex
which comprises the light-diffusion pattern provided in a diaphragm.
Explanation of sign
[0025]
DESCRIPTION OF SYMBOLS 1 ... Speaker, 3 ... Frame, 7 ... Back wall, 10 ... Magnet, 12 ... Voice
coil, 13 ... Bobbin, 14 ... Damper, 15 ... Printed circuit board 18: Diaphragm 22: Center cap 17:
Multicolor LED (light emitting element).
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