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DESCRIPTION JP3161216

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DESCRIPTION JP3161216
Abstract: [Problem] An audio can be output like a speaker simply by attaching it to a vibrating
body such as a box, a cylinder or a plate without using an amplification amplifier, and it is
excellent in portability and usability, and can be carried as an accessory To provide an acoustic
unit that can also A vibration unit is directly connected to a vibration unit mounted on a vibration
body and outputting sound from the vibration body, and a jack 470 of an electronic device 400
outputting an audio signal to an earphone or a headphone without using an amplification
amplifier. The vibration unit vibrates the vibrating body with an audio signal output from the
jack, and outputs sound from the vibrating body. [Selected figure] Figure 1
Sound unit
[0001]
The present invention relates to an acoustic unit capable of outputting sound like a speaker only
by being attached to a vibrating body such as a box, a cylinder, a plate or the like without using
an amplification amplifier.
[0002]
At present, electronic devices such as personal computers, music players and mobile phones are
widely used.
These electronic devices are provided with jacks for connecting earphones and headphones.
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1
[0003]
Conventionally, when listening to voice using a jack of an electronic device, an earphone or a
headphone is connected to the jack. Alternatively, when listening to the sound by a device other
than the earphone or the headphone, connect a resonant speaker as disclosed in Patent
Document 1 below to a jack, and abut this resonant speaker to an object capable of transmitting
sound to output a sound. Let
[0004]
Utility model registration 3136207 gazette
[0005]
The resonant speaker disclosed in the above-mentioned Patent Document 1 causes the same
sound as the speaker to be output just by bringing it into contact with an object that can conduct
nearby audio without using a speaker that is inconvenient to carry. It has the advantage of being
able to
[0006]
However, the voltage of the audio signal output from the jack of the electronic device is large
enough to drive the earphone or the headphone.
Therefore, there is a drawback that an amplifier for amplifying the audio signal is required to
output the same sound as the speaker with the above-mentioned resonant speaker.
[0007]
The above-mentioned resonant speaker is convenient in that it can substitute a familiar thing that
can conduct sound as a speaker.
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2
However, there is still room for improvement in terms of portability and usability, such as the
need to carry an amplifier and the need to secure a power supply for this amplifier.
[0008]
The present invention has been made to solve the problems of the prior art as described above,
and a speaker can be mounted simply by attaching it to a vibrating body such as a box, a cylinder
or a plate without using an amplification amplifier. In the same way, it aims to provide an
acoustic unit that can output audio in the same manner, is portable, easy to use, and can be
carried as an accessory.
[0009]
The acoustic unit according to the present invention for achieving the above object comprises an
amplifier and a vibration unit mounted on a vibrator and outputting sound from the vibrator, and
a jack of an electronic device outputting an audio signal to an earphone or a headphone. And the
connection unit directly connects the vibration unit, and the vibration unit vibrates the vibrating
body with the audio signal output from the jack, and outputs the audio from the vibrating body.
[0010]
The vibrating unit has a permanent magnet with enhanced magnetic force, a low impedance coil
disposed around the permanent magnet, and a conductor that efficiently transmits the vibration
of the coil to the vibrating body.
[0011]
According to the sound unit of the present invention configured as described above, sound is
output like a speaker only by being attached to a vibrating body such as a box, a cylinder, a plate
or the like without using an amplifier. Can.
In addition, since an amplifier is unnecessary, it can be carried as an accessory by making it
excellent in portability, usability, and design.
[0012]
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It is an outline view of a sound unit concerning this embodiment.
It is an exploded view of the sound unit main part concerning this embodiment.
It is a sectional view of a vibration unit concerning this embodiment.
[0013]
Hereinafter, an embodiment of an acoustic unit according to the present invention will be
described in detail based on the drawings.
[0014]
FIG. 1 is an external view of an acoustic unit according to the present embodiment.
[0015]
The sound unit 100 is comprised from the sound unit main body 200 and the connection cord
300 as shown to a figure.
[0016]
In the acoustic unit main body 200, one of the two halves and the other hemispherical case
150A, 150B combine to form a spherical shape.
The hemispherical cases 150A and 150B have a structure that can be divided and combined.
[0017]
The hemispherical cases 150A and 150B are hollow cases.
A protrusion 152 is formed on the top of the hemispherical case 150 A, and a hole for passing
the strap 160 is formed in the protrusion 152.
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Therefore, the strap 160 can be attached to the hemispherical case 150A to carry the acoustic
unit body 200. A female jack 170 is attached to the top of the hemispherical case 150B. The
female jack is attached to the top so that the connection cord 300 can be easily inserted even
when the vibration unit (described later) contained in the hemispherical case 150B is attached to
the vibrator. is there. Here, when a vibration unit such as a box, a cylinder, a plate, or the like
housed in a hemispherical case 150B is attached, the vibration body receives the vibration of the
vibration unit to resonate, and outputs a sound as a speaker It is a generic term for things that
can be done.
[0018]
The jack 170 is attached to the hemispherical case 150B so that the outer surface of the top of
the hemispherical case 150B is flush with the surface surrounding the hole of the jack 170. The
reason for making this flush is to make it difficult to understand that the jack 170 is attached to
the top of the hemispherical case 150 B, and to consider the design of the acoustic unit body
200.
[0019]
The hemispherical cases 150A and 150B are molded of insulating plastic or resin. In FIG. 1, the
hemispherical cases 150A, 150B are neither colored nor patterned. However, in order to make
the design excellent, colors such as red, green, blue, and yellow are colored, and further, if a
pattern such as a geometric pattern, a person, a landscape, or a cartoon character is given on the
surface. good.
[0020]
The sound unit main body 200 is connected to a female jack 470 provided in an electronic
device 400 such as a personal computer, a music player, and a mobile phone via a connection
cord 300.
[0021]
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The connection cord 300 comprises male connectors 320A, 320B at both ends.
Therefore, by inserting the male connector 320 B of the connection cord 300 into the female
jack 170 of the acoustic unit body 200 and inserting the male connector 320 A of the connection
cord 300 into the female jack 470 of the electronic device 400 The acoustic unit main body 200
and the electronic device 400 are electrically connected.
[0022]
The connection cord 300 is normally attached with a male connector at one end and a female
jack at the other end. In the connection cord 300 of the present embodiment, male connectors
320A and 320B are attached to both ends. This is because, when a male connector is attached to
the acoustic unit body 200, the male connector protrudes from the acoustic unit 200 to the
outside, which significantly impairs the design of the acoustic unit body 200. This is because the
mounting portion of the connector is easily broken when being hit or hit.
[0023]
FIG. 2 is an exploded view of the acoustic unit main body according to the present embodiment.
[0024]
Nothing is stored inside the hemispherical case 150A of the acoustic unit main body 200.
On the other hand, in the hemispherical case 150B, the vibration unit 120 and the jack 170 are
housed.
[0025]
The vibration unit 120 has, for example, a function of being attached to a vibrating body such as
a box, a cylinder, a plate or the like and outputting sound from the vibrating body.
[0026]
The vibration unit 120 is wound around a permanent magnet 121 (see FIG. 3), a magnet holder
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122 for supporting the permanent magnet 121, a paper cylinder 123 which is a cylinder made of
high strength paper, and the paper cylinder 123 and fixed. Coil 124 (see FIG. 3), an insulating
plate 125 for preventing the conductor (not shown) connecting the both ends of the conductor
forming the coil 124 and the terminals of the connector 170 from contacting the magnet holder
122, paper A conductor 126 for efficiently transmitting the vibration of the cylinder 123 to a
vibrating body such as a box, a cylinder, a plate, an adhesive tape 127 for attaching the
conductor 126 to the vibrating body, and a vibrating unit fixture 130 for supporting the magnet
holder 122 Equipped with
[0027]
The magnet holder 122 that constitutes the vibration unit 120 is supported by the vibration unit
fixture 130.
Also, the vibration unit fixture 130 is fixed to the hemispherical case 150B.
Furthermore, the vibrating unit fixture 130 has a connecting portion 132 for connecting the
hemispherical case 150A to the hemispherical case 150B. When the vibrating unit fixture 130 is
fixed to the hemispherical case 150B, a space is formed between the vibrating unit 120 and the
hemispherical case 150B. This space resonates when the vibration unit 120 is attached to the
vibrating body and outputs sound, and increases the sound pressure of the sound. Therefore, the
vibration unit 120 can efficiently output sound from the vibration body. The reason why there is
no need to provide an amplification amplifier between the electronic device 400 and the acoustic
unit main body 200 is because such a detailed arrangement is made.
[0028]
The hemispherical case 150A is attached to the hemispherical case 150B housing the vibration
unit 120 and the jack 170 via the vibration unit fixture 130, and in particular, the conductor 126
side of the vibration unit 120 is directly connected from the outside. It plays a role of protecting
from impact. At the same time, the hemispherical case 150A is integrated with the hemispherical
case 150B by the vibration unit fixture 130 so that the design of the acoustic unit body 200 is
excellent and the acoustic unit body 200 can be carried around as an accessory. It is also
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[0029]
In addition, although the shape of the sound unit main body 200 illustrates a spherical thing
above, the sound unit 100 of this invention does not restrict the shape of the sound unit main
body 200 to a spherical thing. For example, any shape such as a triangular shape, a quadrangular
shape, a polygonal shape, or a shape resembling a cartoon character, as long as it can secure a
hollow space in which the vibration unit 120 and the jack 170 can be stored. Can be applied to
[0030]
The sound unit 100 according to the present embodiment can output sound with a sound
pressure comparable to that of the speaker only by attaching the sound unit main body 200 to
the vibrating body without using an amplifier. It is like that.
[0031]
Therefore, the structure of the permanent magnet 121, the magnet holder 122, the coil 124, and
the conductor 126 is carefully designed so that sufficient sound pressure can be obtained only
with the voltage of the audio signal directly input from the jack 470 of the electronic device 400.
There is.
[0032]
The permanent magnet 121 enhances the magnetic force than that generally used, and uses an
anisotropic ferrite magnet having a large magnetic flux density or a neodymium magnet which is
expensive now but has a strong magnetic force.
[0033]
Further, the magnet holder 122 is formed of a metal material having high permeability so that
the magnetic flux emitted from the permanent magnet 121 does not escape to the outside.
[0034]
Further, the coil 124 is designed to have a thickness and a number of turns of the wire forming
the coil 124 so as to decrease the direct current resistance as well as to allow a larger current to
flow, as well as reducing the impedance.
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Specifically, when the impedance of the coil 124 is 1000 Hz, it is about 2 Ω or less.
[0035]
In addition, the conductor 126 must be able to transmit vibrations directly in contact with the
vibrating body, and it is necessary to efficiently transmit the vibrations of the minute coil 124
through the paper tube 123. Light and strong plastic material is used.
[0036]
Also, since the conductor 126 has to be easily attached to the vibrator, the adhesive tape 127
having a characteristic that the adhesive strength is not so large and can be repeatedly attached
and detached is attached to the surface in contact with the vibrator.
In addition, you may use a double-sided tape instead of an adhesive tape.
Alternatively, a suction plate may be attached to the conductor 126 instead of the adhesive tape
127 and the double-sided tape.
In addition, since the vibration of the conductor 126 must be conducted to the vibrator without
being attenuated as much as possible, it is preferable to use the adhesive tape 127 or the doublesided tape rather than using the suction plate.
[0037]
The insulating plate 125 prevents the lead connecting the both ends of the lead forming the coil
124 and the terminal of the connector 170 from contacting the magnet holder 122 and shorting
when the vibration unit 120 is housed in the hemispherical case 150B. Used to
[0038]
FIG. 3 is a cross-sectional view of the vibration unit according to the present embodiment.
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FIG. 3 shows a cross-sectional view of a state in which the vibration unit 120 is assembled, unlike
the exploded view of FIG.
[0039]
The magnet holder 122 has a circular shape when viewed from the vertical direction as shown in
FIG.
The magnet holder 122 has a cylindrical receiving portion 122 </ b> A formed in a concave
shape for receiving the magnet 121. A circular flange-shaped flat portion 122B is formed around
the housing portion 122A. Therefore, the magnet holder 122 has a shape in which a hat is
inverted.
[0040]
A cylindrical permanent magnet 121 whose height is smaller than its own diameter is
accommodated in the accommodation portion 122A of the magnet holder 122 so as to be
surrounded by the bottom surface and the side wall of the accommodation portion 122A. The
bottom surface of the permanent magnet 121 and the bottom surface of the housing portion
112A are in close contact without a gap. On the upper part of the permanent magnet 121, a
washer 131 made of metal and having a large magnetic permeability is mounted, and on the
upper part of the washer 131, the permanent magnet 133 is mounted. The washer 131 is in
close contact with the permanent magnet 121 without a gap, and the permanent magnet 133 is
also in close contact with the washer 131 without a gap. If there is a gap, a part of the magnetic
flux of the permanent magnet 121 and the permanent magnet 133 leaks to the outside without
being transmitted to the magnet holder 122 and the washer 131, which causes a decrease in the
magnetic force. The permanent magnets 121 and 133 are disposed such that the N pole and the
S pole face each other via the washer 131. The washer 131 vertically aligns the direction of the
magnetic flux passing between the permanent magnets 121 and 133 to prevent the magnetic
flux from leaking to the outside.
[0041]
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Attached to the outer surface of the housing 122A of the magnet holder 122 is a connection
substrate 129 to which the lead wire of the coil 124 passing on the flat portion 122B from the
side surface of the housing 122A is soldered. Therefore, the jack 170 and the coil 124 are
connected via the connection board 129.
[0042]
Between the side surface of the permanent magnet 121, the washer 131, and the permanent
magnet 133 and the side surface of the magnet holder 122, a paper cylinder 123 around which
the coil 124 is wound is disposed movably in the longitudinal direction. Ru. The dimension of the
gap between the washer 131 and the side surface of the magnet holder 122 is substantially the
same as the thickness of the paper cylinder 123. Therefore, the paper tube 123 is guided by the
washer 131 and the side surface of the magnet holder 122 to move up and down (oscillate).
[0043]
Also, the coil 124 is wound at a position facing the washer 131. This is because the magnetic
force is strongest around the washer 131. Thus, the sound pressure of sound can be increased by
devising the arrangement of the permanent magnet 121, the washer 131, the permanent magnet
133, and the coil 124.
[0044]
The acoustic unit main body 200 according to the present embodiment has to vibrate the
vibrator only by the electric signal from the jack 470 of the electronic device 400 without using
the amplification amplifier. For this reason, the external leakage of the magnetic flux leads to the
deterioration of the performance, especially to the reduction of the sound pressure of the
obtained sound, and therefore, it should be avoided as much as possible. Since the magnet holder
122 and the washer 131 use a metal having a high magnetic permeability, the magnetic lines of
force of the permanent magnets 121 and 133 can be effectively applied to the coil 124.
[0045]
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The paper cylinder 123 is disposed on the outer periphery of the permanent magnet 121, the
washer 131, and the permanent magnet 133 so as to surround them. The coil 124 wound
around the paper cylinder 123 is disposed so as to cover the outer peripheral portion of the
washer 131. The paper cylinder 123 and the coil 124 are fixed with an adhesive or the like.
[0046]
The paper cylinder 123 floats between the side surfaces of the permanent magnet 121, the
washer 131, the permanent magnet 133 and the side surface of the magnet holder 122 and from
the bottom surface of the magnet holder 122 so that the paper tube 123 can vibrate freely when
an audio signal flows through the coil 124. In this state, it must be disposed on the outer
periphery of the permanent magnet 121. For this reason, the paper tube 123 is vibratably
supported by the damper 128 attached to the flat portion 122B of the magnet holder 122.
[0047]
The damper 128 is formed in a donut shape having a hollow portion along the shape of the flat
portion 122B, and the cross section in the vertical direction is corrugated. The damper 128
vibratably supports the paper cylinder 123 inserted in the hollow portion of the damper 128.
The diameter of the paper cylinder 123 is equal to or slightly larger than the diameter of the
hollow portion of the damper 128. The outer peripheral portions of the damper 128 and the
paper cylinder 123 are fixed with an adhesive. The outer peripheral portion of the damper 128 is
fixed to the flat portion 122 B of the magnet holder 122 with an adhesive.
[0048]
Therefore, when the coil 124 vibrates in the thickness direction of the permanent magnet 121,
the paper cylinder 123 supported by the damper 128 vibrates in the length direction in
synchronization with the vibration.
[0049]
A conductor 126 having a diameter larger than the diameter of the paper cylinder 123 is
attached to the tip of the paper cylinder 123.
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The conductor 126 is a plastic having a disk-like outer shape that closes the hole of the paper
cylinder 123. One side of the conductor 126 is disk-shaped, while the other side has a plurality
of projections which are fitted into the inner peripheral surface of the paper cylinder 123. The
conductor 126 is attached to the front end portion of the paper cylinder 123 by adhering these
protrusions to the inner peripheral surface of the paper cylinder 123. At this time, the sealing
property is secured such that air does not leak from between the open portion of the tip end
portion of the paper tube 123 and the conductor 126. A removable pressure-sensitive adhesive
tape 127 is temporarily attached to the disk-like outer surface on one side of the conductor 126
so that the conductor 126 can be attached to the vibrator.
[0050]
Since the conductor 126 must be conducted to the vibrator without damping the vibration of the
coil 124, the conductor 126 is fixed to the open end of the paper cylinder 123 in the present
embodiment in the form of a disc. By making the conductor 126 disk-like in this manner, the
pressure of air trapped in the paper tube 123 can be effectively used as a force for pushing up
the conductor 126 as compared with the case where it is made donut-shaped. Therefore, the
vibration can be efficiently transmitted to the conductor 126. In the case of the doughnut-like
shape, air leaks from the hollow portion according to the vibration of the conductor 126, and the
vibration can not be efficiently transmitted to the conductor 126.
[0051]
Since the conductor 126 must be conducted to the vibrator without damping the vibration of the
coil 124, its weight also needs to be considered. When the weight of the conductor 126 is heavy,
it becomes difficult to make a high sound. Therefore, the weight and weight ratio of each of the
paper cylinder 123, the coil 124, and the conductor 126, and the braking ability of the damper
128 make the frequency characteristics of the sound as flat as possible so that the sound can be
output efficiently from the vibrating body. Repeat the precise experiment to make the decision.
[0052]
When using the acoustic unit 100 configured as described above, mounting and removal are
performed in the following procedure.
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[0053]
First, the hemispherical case 150A of the spherical acoustic unit main body 200 is rotated, and
the hemispherical case 150B is removed from the connection portion 132 of the vibration unit
fixture 130.
The conductor 126 is exposed from the vibrating unit fixture 130 which looks like the open
surface of the hemispherical case 150B, and the adhesive tape 127 is attached to the contact
surface, so the contact surface is a box, cylinder, plate, etc. The hemispherical case 150B is
attached to the vibrating body by contacting the vibrating body.
[0054]
The connector 320B of the connection cord 300 is inserted into a jack 170 provided on the top
of the hemispherical case 150B, and the connector 320A of the connection cord 300 is inserted
into a jack (for example, an earphone jack) 470 of the electronic device 400. Since the jack 170
is provided on the top of the hemispherical case 150B, even if a force is applied when inserting
the connector 320B, the force acts in a direction to press the conductor 126 against the vibrator,
and the hemispherical case 150B is attached to the vibrator The connector 320B can be easily
connected in the state as it is.
[0055]
When an audio signal is output from the electronic device 400 in a state where the connection
cord 300 is connected to the acoustic unit main body 200, a vibration corresponding to the
audio signal is generated between the permanent magnet 121 and the coil 124, and the vibration
is a paper tube. The vibrator is vibrated by being transmitted to the conductor 123 and the
conductor 126. At the same time, the sound is reflected in the space formed between the
vibration unit 120 attached to the vibration unit fixture 130 and the hemispherical case 150B,
and the sound pressure increases.
[0056]
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As a result, the sound of sound pressure similar to that of the speaker is output from the
vibrating body. Note that the sound pressure in this case is not as large as that of a speaker
driven by an amplifier, but it is generally practical enough to enjoy music in a quiet place or give
a presentation in a company. There is sex.
[0057]
After use, the connection cord 300 is removed from the hemispherical case 150B and the
electronic device 400, the hemispherical case 150B is removed from the vibrator, and the
hemispherical case 150A is attached to the hemispherical case 150B. Then, the sound unit body
200 is attached to a bag or the like by the strap 160. In this way, the sound unit body 200 also
functions as an accessory and can be easily carried.
[0058]
As described above, according to the acoustic unit 100 according to the present embodiment, the
amplifier is unnecessary, so it is convenient for carrying around, and since the power supply of
the amplifier is not necessary, the usability is also very good. Furthermore, since it can be carried
as an accessory, it is not bothersome to carry it regardless of the use of the acoustic unit 100. In
addition, since the amplifier and the power source are not required, the number of parts can be
reduced, and not only can be manufactured inexpensively, but also the reliability can be
improved.
[0059]
DESCRIPTION OF SYMBOLS 100 sound unit, 120 vibration unit, 121, 133 permanent magnet,
122 magnet holder, 123 paper cylinder, 124 coil, 125 insulation board, 126 conductor, 127
adhesive tape, 128 damper, 130 vibration unit fixture, 131 washer, 132 Coupling part, 150A,
150B hemispherical case, 152 protrusion, 160 strap, 200 sound unit body, 300 connection cord,
320A, 320B connector (male type), 400 electronic equipment, 170, 470 jack (female type).
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