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JP2016019064

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DESCRIPTION JP2016019064
The present invention provides an acoustic device which can be easily attached to a seat and can
deliver a deep bass and a wide scale due to the vibration of the seat to a seated person. A sound
device 21 is provided on a diaphragm 22 attached to headrest stays 20 and 20 connecting a
headrest 13 of a seat 10 to a backrest 12, an exciter 23 fixed to the diaphragm 22, and a
diaphragm 22. The pair of left and right magnets 24 and 24 are provided, and are provided at
positions overlapping the headrest stays 20 and 20 at the left and right ends of the front surface
22 a of the diaphragm 22. When the exciter 23 is driven by an amplifier or the like, the vibration
of the exciter 23 vibrates the diaphragm 22 and the headrest 13 to function as a speaker that
outputs a wide scale, and is transmitted to the seatback frame via the headrest stays 20 and 20.
The backrest 12 vibrates as a whole by the vibration of the exciter 23. [Selected figure] Figure 2
Acoustic device
[0001]
The present invention relates to an acoustic device.
[0002]
2. Description of the Related Art Conventionally, there is known an acoustic device capable of
causing a seated person to experience a bass range by providing a vibration unit on a structural
material such as a frame of a seat and vibrating the seat by the vibration unit (for example,
Patent Document 1) reference).
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1
In patent document 1, the 2nd vibration unit for low-pitched regions for vibrating a sheet ¦ seat
is provided behind the lower end of a backrest part, and the 1st vibration unit which reproduces
full range is provided in the front end of an armrest.
[0003]
Japanese Patent Application Publication No. 2001-285976
[0004]
However, in the above-described conventional acoustic device, the second vibrating unit is for the
low-pitched range for generating the vibration, and therefore, the wide scale can not be
reproduced.
Furthermore, since the second vibration unit is at a position far from the seater's ear, even if a
large scale can be reproduced, it is difficult for the sound to reach the seater. For this reason, in
the conventional acoustic device, a separate first vibration unit is required. Further, in the abovementioned conventional acoustic device, the second vibration unit is provided behind the lower
end of the backrest, so that it is difficult to attach. In particular, when trying to retrofit the
backrest with the cushion, the cushion is removed. Therefore, it is necessary to attach the second
vibration unit to the frame member or the like, which takes time and effort. The present
invention has been made in view of the above-described circumstances, and provides an acoustic
device that can be easily attached to a seat and can deliver a deep bass and a wide scale due to
the vibration of the seat to a seated person. The purpose is
[0005]
In order to achieve the above object, the present invention provides an acoustic device
comprising: a diaphragm attached to a headrest stay connecting a headrest of a seat to a
backrest; and a vibrator fixed to the diaphragm. Do. Further, the present invention is
characterized in that the diaphragm is mounted across a pair of the headrest stays. Further,
according to the present invention, the vibrator is disposed at an intermediate portion between
the pair of headrest stays.
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2
[0006]
Furthermore, according to the present invention, an electric wire is connected to each of the pair
of headrest stays extending inside the backrest, and an electric signal is transmitted from the
electric wire to the vibrator via the pair of headrest stays. It features. Further, the present
invention is characterized by comprising a terminal body attached to an outer peripheral portion
of the pair of headrest stays, and the vibrator is connected to the terminal body to transmit an
electric signal.
[0007]
Further, the present invention is characterized in that the diaphragm is fixed to the headrest stay
by a magnetic force. Furthermore, the present invention is characterized in that the diaphragm is
fastened and fixed to the headrest stay. Further, according to the present invention, the
diaphragm includes arms extending outward to the left and right and abutting on the inner side
surfaces of the pair of headrest stays, and the arms are connected via the curved surface along
the inner side surface. It is characterized in that it is mounted so as to push the headrest stay
outward to the left and right.
[0008]
Further, according to the present invention, the diaphragm may include a bulging portion which
bulges to the rear side of the seat with respect to a connection portion with the pair of headrest
stays, and the vibrator is provided in the bulging portion. It is characterized by Further, the
invention is characterized in that the vibrator is fixed to a rear surface of the diaphragm and is
attached to a rear surface side of the headrest stay. Further, the present invention is
characterized in that a cover that covers the diaphragm and the vibrator is attached to the
diaphragm.
[0009]
Furthermore, the present invention is characterized in that speakers are provided on the left and
right of the headrest stay, and the speakers are supported by the cover. Further, according to the
present invention, a cover that covers the diaphragm and the vibrator is attached to the
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diaphragm, a magnet for fixing the diaphragm to the headrest stay is provided on the front
surface of the diaphragm, and the cover is It is characterized by having an opening which
exposes a magnet to the said headrest stay side. Further, the present invention is characterized in
that the headrest stay includes an inner frame portion extending inside the cushion of the
headrest, and the diaphragm is attached to the inner frame portion. Further, the present
invention is characterized in that the vibrator is an exciter that vibrates an attachment target of
the vibrator to output a sound.
[0010]
According to the present invention, it is possible to provide an acoustic device which can be
easily attached to a seat and can deliver a deep bass and a wide scale due to the vibration of the
seat to a seated person.
[0011]
It is the perspective view which looked at the sheet to which the sound equipment concerning a
1st embodiment of the present invention is attached from the back side.
It is the perspective view which looked at the sheet ¦ seat in which the acoustic apparatus was
attached from the front side. It is the perspective view which looked at the sheet ¦ seat in which
the acoustic apparatus was attached from the back side. It is the perspective view which looked
at the state where the sound equipment of a 2nd embodiment was attached to a headrest stay
from the front side. It is the figure which looked at the state to which the terminal body of the
acoustic apparatus of 3rd Embodiment was attached from the back of a sheet ¦ seat. It is a
perspective view of a terminal object. It is the perspective view which looked at the state where
the sound equipment of a 4th embodiment was attached to a headrest stay from the front side. It
is the perspective view which looked at an acoustic device from the front side. It is the figure
which looked at the acoustic apparatus from the downward direction. It is the perspective view
which looked at the state where the sound equipment of a 5th embodiment was attached to a
headrest stay from the back side. It is the top view which looked at an acoustic apparatus from
upper direction. It is the perspective view which looked at the state where the sound equipment
of a 6th embodiment was attached to a headrest stay from the front side. It is the perspective
view which looked at the state where the sound equipment of a 7th embodiment was attached to
a headrest stay from the front side. It is the perspective view which looked at the state where the
sound equipment of an 8th embodiment was attached to the headrest stay in a headrest from the
front side.
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[0012]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings. First Embodiment FIG. 1 is a perspective view of a sheet to which an acoustic device
according to a first embodiment of the present invention is attached as viewed from the rear side.
[0013]
The seat 10 is a seat for an occupant disposed in a vehicle compartment. Examples of the cabin
include a cabin of a mobile body such as a car, a train, an airplane, and a ship. The seat 10 is
installed on a floor or the like and has a seat portion 11 on which a seated person sits, a backrest
12 extending upward in a posture slightly inclined rearward from the rear end of the seat 11,
and the backrest 12 And a headrest 13 attached to the upper end. Here, in FIG. 1, the rear
surface of the backrest 12 is shown in a notched state to show the internal structure of the
backrest 12.
[0014]
The backrest 12 includes a seatback frame 14 that forms a framework of the backrest 12 and a
cushion 15 that covers the seatback frame 14 in all directions. The seat back frame 14 is formed
in a substantially rectangular frame shape longer in the vertical direction than in the left and
right. The seat back frame 14 is a frame made of metal pipe material such as ferrous material or
plate material, and extends from the lower end to the upper end of the backrest 12 inside the
cushion 15. Specifically, the seat back frame 14 includes a pair of vertical frame portions 14a
and 14a which are vertically separated from each other in the left and right direction, an upper
cross portion 14b connecting the upper ends of the vertical frame portions 14a and 14a to the
left and right, and a vertical frame portion 14a. , 14a, and a lower cross portion 14c connecting
the lower ends of the lower end to the left and right.
[0015]
The backrest 12 includes a headrest connecting portion 16 to which the headrest 13 is
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connected on the upper surface 12a. The headrest connecting portion 16 includes a pair of left
and right insertion holes 17, 17 formed on the upper surface 12a, and a pair of left and right
stay engaging portions (not shown) provided in the upper cross portion 14b below the insertion
holes 17, 17. Prepare. The stay engaging portion is made of an electrically insulating resin
material.
[0016]
The headrest 13 includes a block-shaped headrest cushion 19 for receiving the head of a seated
person, and a pair of left and right headrest stays 20 and 20 extending downward from the lower
surface of the headrest cushion 19. The headrest stays 20, 20 each include an inner frame
portion (not shown) that extends inside the headrest cushion 19 and supports the headrest
cushion 19. The headrest stays 20, 20 are metal pipe materials such as iron-based materials. In
detail, the headrest stays 20, 20 are round pipes having a substantially circular cross section. The
headrest stays 20, 20 are disposed in the vicinity of the left and right ends of the lower surface of
the headrest cushion 19, and extend downward substantially in parallel with each other at a
predetermined distance in the left-right direction. The distance between the left and right of the
headrest stays 20, 20 is smaller than the distance between the left and right of the vertical frame
portions 14a, 14a.
[0017]
The headrest 13 is connected to the backrest 12 by the headrest stays 20, 20 being inserted into
the insertion holes 17, 17 of the backrest 12 from above. The lower portions of the headrest
stays 20, 20 inserted into the insertion holes 17, 17 are engaged with the stay engaging portions
and fixed in position. The seated person can adjust the vertical position of the headrest 13
according to the physique, preference, etc. by sliding the headrest 13 up and down and engaging
the headrest stays 20, 20 with the stay engaging portion at an arbitrary position. It is. For this
reason, the length of the headrest stays 20, 20 exposed to the outside of the backrest 12 changes
depending on the fixed position of the top and bottom of the headrest 13.
[0018]
FIG. 2 is a perspective view of the seat 10 to which the acoustic device 21 is attached as viewed
from the front side. FIG. 3 is a perspective view of the seat 10 to which the acoustic device 21 is
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attached as viewed from the rear side. The seat back frame 14 is not shown in FIG. The acoustic
device 21 includes a flat diaphragm 22 attached to the headrest stays 20 and 20, an exciter 23
as a vibrator fixed to the diaphragm 22, and a pair of left and right magnets 24 and 24 provided
on the diaphragm 22. Equipped with
[0019]
The diaphragm 22 is a metal plate made of an iron-based material, an aluminum-based material,
or the like. The diaphragm 22 is a substantially rectangular plate longer in the left-right direction
than in the vertical direction having a length provided across the headrest stays 20, 20. In the
first embodiment, the diaphragm 22 is longer than the distance between the headrest stays 20
and 20 and protrudes to the left and right outside of the headrest stays 20 and 20. The
diaphragm 22 has a front surface 22a attached to the outer peripheral surface of the headrest
stays 20, 20 extending substantially vertically and facing the front side (seated person side), and
a rear surface 22b of the rear surface of the front surface 22a.
[0020]
The magnets 24, 24 are made of a substantially rectangular plate-like metal. The magnets 24 are
provided at positions overlapping the headrest stays 20 at the left and right ends of the front
surface 22 a of the diaphragm 22. The upper and lower widths of the magnets 24 are smaller
than the upper and lower widths of the diaphragm 22, and the magnets 24 are provided along
the lower edge side of the diaphragm 22.
[0021]
The exciter 23 is a vibrator provided with a case 25 and a voice coil bobbin, a voice coil, a
magnet, a pole base and the like (not shown) housed in the case 25 and is produced by Lorentz
force due to current flow in the voice coil. The exciter 23 itself vibrates. The exciter 23 functions
as a speaker by vibrating the mounting object mounted in contact with the case 25 by its own
vibration and outputs a sound.
[0022]
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The exciter 23 is fixed to the left and right central portions of the diaphragm 22 by bringing the
case 25 into contact with the rear surface 22 b of the diaphragm 22. That is, in the first
embodiment, the attachment object that functions as a speaker is mainly the diaphragm 22 and
the headrest 13 to which the diaphragm 22 is attached. Wiring (not shown) for transmitting an
electrical signal to the exciter 23 is drawn out from the exciter 23 and connected to equipment
such as an amplifier (not shown) disposed on the front side of the sheet 10, for example.
[0023]
When the exciter 23 is driven by an amplifier or the like, the diaphragm 22 and the headrest 13
vibrate due to the vibration of the exciter 23 to function as a speaker that outputs a wide scale,
and the seatback frame 14 via the headrest stays 20 and 20. The backrest 12 vibrates as a whole
by the transmitted vibration of the exciter 23. Therefore, a wide scale from the low-pitch range to
the high-pitch range can be output from the headrest 13 side close to the seat occupant's ear and
easy to hear sounds, and by transmitting the vibration directly from the backrest 12 to the seat
occupant, It is possible to make a seated person feel a deep bass. That is, when the acoustic
device 21 is attached, the seat 10 becomes a bodily sensation type acoustic device in which a
seated person can feel a deep bass from vibration. In the first embodiment, the seat occupant can
feel from the deep low tone range to the high tone range with a simple configuration in which
one exciter 23 is provided. Further, since the acoustic device 21 is attached to the headrest stays
20, 20, when the seated person adjusts the height of the headrest 13 according to the physique,
the position of the acoustic device 21 automatically becomes a position suitable for the seated
person. . Therefore, it is possible to position the acoustic device 21 at a position where it is
always easy to hear the sound according to the physical constitution of the seated person.
[0024]
The acoustic device 21 is fixed to the headrest stays 20, 20 by magnetic force by bringing the
front surfaces of the magnets 24, 24 into contact with the back sides 20 a, 20 a of the headrest
stays 20, 20. For this reason, the user can easily attach the acoustic device 21 only by bringing
the magnets 24, 24 into contact with the rear side 20a, 20a (FIG. 1) of the headrest stays 20, 20
exposed to the outside from the rear. When the acoustic device 21 is attached to the headrest
stays 20, 20 by the magnets 24, 24, the exciter 23 is located at an intermediate portion between
the left and right headrest stays 20, 20. Thus, the middle portion of the diaphragm 22 can be
efficiently vibrated back and forth by the vibration of the exciter 23 with the left and right end
portions of the diaphragm 22 as a fulcrum, and the left and right headrest stays 20 and 20 are
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8
substantially uniformly excited. It can transmit 23 vibrations. For this reason, while being able to
output the sound of a good wide scale from the headrest 13 side, the heavy bass which a seated
person feels by the vibration of the backrest part 12 can be made into a good thing of balance.
[0025]
Further, since the acoustic device 21 is attached to the rear side 20a, 20a of the headrest stays
20, 20 and the exciter 23 is fixed to the rear surface 22b of the diaphragm 22, the exciter 23 can
be prevented from protruding forward. 21 can be prevented from being in the way of the seat
occupant. Furthermore, since the acoustic device 21 is attached to the rear side 20a, 20a, the
acoustic device 21 passes between the headrest stays 20, 20 and is seated even if acceleration of
deceleration is applied to a car or the like on which the seat 10 is installed. Can not move to the
side. Further, since the exciter 23 is fixed to the rear surface 22 b of the diaphragm 22, it can not
move forward through the diaphragm 22. For this reason, even when acceleration for
deceleration is generated, it is possible to prevent the acoustic device 21 from disturbing a seated
person.
[0026]
The headrest stays 20 and 20 have a cylindrical shape, and the magnets 24 and 24 have a flat
plate on the front surface, so the rear faces 20a and 20a and the magnets 24 and 24 are
connected by floating force by magnetic force in a substantially linear contact state It is done.
When the diaphragm 22 vibrates in the front-rear direction due to the vibration of the exciter 23,
the position of the line contact with the rear surface side 20a, 20a changes minutely with the
deflection of the diaphragm 22 of the magnets 24, 24. Thereby, it is possible to effectively
release the shocking force acting on the connection portion between the magnets 24 and 24 and
the rear side 20a and 20a, and it is possible to improve the sound quality by making the sound
outputted from the headrest 13 side soft. . Further, since the diaphragm 22 and the headrest
stays 20, 20 are metal and have high thermal conductivity, the heat generated by the exciter 23
can be dissipated efficiently.
[0027]
As described above, according to the first embodiment to which the present invention is applied,
the acoustic device 21 includes the diaphragm 22 attached to the headrest stays 20 and 20
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connecting the headrest 13 of the seat 10 to the backrest 12. , And an exciter 23 fixed to the
diaphragm 22. Therefore, the vibration of the exciter 23 can be transmitted to the backrest 12
via the diaphragm 22, and the bass can be felt by the seated person due to the vibration of the
backrest 12, and the diaphragm 22 and the headrest 13 can be excited by the exciter 23. The
sound of the wide scale generated by direct vibration can be output from a position close to the
seat occupant's ear. Furthermore, since the acoustic device 21 can be attached to the headrest
stays 20 and 20 from the outside, the attachment work is easy. Furthermore, when the seated
person adjusts the height of the headrest 13 in accordance with the physique, the position of the
acoustic device 21 automatically becomes a position suitable for the seated person, and always
positions the acoustic device 21 at a position where it is easy to hear sounds. Can. Further, since
the headrest 13 for outputting sound is close to the seater's ear, the seater can feel the sound
even if the volume of the headrest 13 side (volume of the exciter 23) is reduced, and the sound is
unlikely to leak around A personal acoustic space can be realized.
[0028]
Further, since the diaphragm 22 is attached across the pair of headrest stays 20, the support
rigidity of the diaphragm 22 can be made appropriate, and the diaphragm 22 can be effectively
vibrated to output sound. Further, since the diaphragm 22 is supported on the left and right, the
diaphragm 22 can be easily attached. In addition, since the exciter 23 is disposed at an
intermediate portion between the pair of headrest stays 20, 20, it can vibrate the diaphragm 22
efficiently to output sound, and the left and right headrest stays 20, 20 vibrate in a well-balanced
manner. Can be transmitted, and the backrest 12 can be efficiently vibrated to make the seated
person feel a deep bass.
[0029]
Further, since the headrest stays 20, 20 are connected to the seat back frame 14 inside the
backrest 12, the backrest 12 is effectively vibrated through the seatback frame 14 to provide a
strong bass for the seat occupant. Can make you feel. Further, since the diaphragm 22 is fixed to
the headrest stays 20 by magnetic force, the diaphragm 22 can be fixed to the headrest stays 20
by a simple structure.
[0030]
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In addition, since the exciter 23 is fixed to the rear surface 22b of the diaphragm 22 and
attached to the rear side 20a, 20a of the headrest stays 20, 20, the diaphragm 22 and the exciter
23 can be prevented from obstructing a seated person . Further, since the vibrator is the exciter
23 that vibrates the attachment object of the vibrator and outputs sound, the backrest 12 can be
effectively vibrated, and the diaphragm 22 and the headrest 13 are vibrated. It can output a wide
scale.
[0031]
The first embodiment shows an aspect to which the present invention is applied, and the present
invention is not limited to the first embodiment. In the first embodiment, the diaphragm 22 is
described as being metal, but the diaphragm 22 may be made of other materials such as a resin
material. Further, the sound device 21 is not limited to the use for reproducing sound for
listening to music and the like, and for example, the exciter 23 can be resonated and driven to
generate a large vibration, which can be used for sleepiness awakening of a seated person.
[0032]
Second Embodiment The second embodiment to which the present invention is applied will be
described below with reference to FIG. In the second embodiment, parts that are the same as in
the first embodiment are given the same reference numerals, and descriptions thereof will be
omitted. In the first embodiment, the wiring for transmitting the electric signal to the exciter 23
is described as being drawn out from the exciter 23 and connected to a device such as an
amplifier disposed on the front side of the sheet 10, for example. However, the second
embodiment is different from the first embodiment in that the electric signal is transmitted to the
exciter 23 by the electric wires 140 and 140 arranged inside the backrest 12.
[0033]
FIG. 4 is a perspective view of a state in which the acoustic device 121 of the second embodiment
is attached to the headrest stays 20, as viewed from the front side. Here, although the seat back
frame 14 (FIG. 1) is not shown in FIG. 4, the lower end portions of the head rest stays 20, 20 are
connected via the stay engaging portion made of resin provided with electrical insulation. And
fixed to the seat back frame 14. Further, in FIG. 4, the front surface of the headrest cushion 19 is
cut away to show the internal structure. The headrest stays 20, 20 include inner frame portions
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20b, 20b extending to the inside of the headrest cushion 19 to support the headrest cushion 19,
and the inner frame portions 20b, 20b are resin crosses with electrical insulation. It is connected
by the member 20c.
[0034]
At the lower ends of the headrest stays 20, a pair of left and right electric wires 140, 140
extending downward inside the backrest 12 are provided. The electric wires 140 and 140 are, for
example, drawn out from the backrest 12 and connected to a device such as an amplifier
disposed on the front side of the seat 10. The acoustic device 121 includes a diaphragm 22, an
exciter 23, magnets 24, 24, and a pair of exciter connection wires (not shown) that electrically
connect the magnets 24, 24 and the exciter 23. In addition, the magnets 24 are fixed to the
diaphragm 22 in a state of being electrically insulated from the diaphragm 22 via an insulating
layer (not shown).
[0035]
An electrical signal for driving the exciter 23 is transmitted to the exciter 23 through the electric
wires 140 and 140, the headrest stays 20 and 20, the magnets 24 and 24 and the exciter
connection wiring. According to the second embodiment to which the present invention is
applied, the electric wires 140 and 140 are respectively connected to the pair of headrest stays
20 and 20 extending to the inside of the backrest 12, and from the electric wires 140 and 140,
the headrest stays 20 and 20. An electrical signal is transmitted to the exciter 23 via the.
Therefore, electric signals can be transmitted directly from the headrest stays 20 and 20 to the
exciter 23, and the electrical connection of the exciter 23 can be realized with a simple structure,
and the electric wires 140 and 140 are hidden inside the backrest 12 Good appearance. Further,
since the exciter 23 can be connected to an amplifier or the like simply by attaching the acoustic
device 121 to the headrest stay 20 or 20 with the magnets 24, the acoustic device 121 is
provided with a long wire for connecting the acoustic device 121 to the amplifier or the like.
There is no need. Therefore, the acoustic device 121 can be easily attached and detached, the
acoustic device 121 can be made compact, and the acoustic device 121 can be easily carried. In
addition, the structure which transmits an electrical signal to exciter 23 via the headrest stay 20
and 20 by the electric wires 140 and 140 by which the inner side of the backrest part 12 is
wired is the 1st-2nd except the below-mentioned 3rd Embodiment. The present invention is
applicable to the configurations of all the embodiments up to 8.
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[0036]
Third Embodiment The third embodiment to which the present invention is applied will be
described below with reference to FIGS. 5 and 6. FIG. In the third embodiment, parts that are the
same as in the first embodiment are given the same reference numerals, and descriptions thereof
will be omitted. In the first embodiment, the wiring for transmitting the electric signal to the
exciter 23 is described as being drawn out from the exciter 23 and connected to a device such as
an amplifier disposed on the front side of the sheet 10, for example. However, in the third
embodiment, the electrical signal is transmitted to the exciter 23 mainly through the terminal
bodies 250, 250 attached to the outer peripheral portions of the headrest stays 20, 20,
respectively. It differs from the form of
[0037]
FIG. 5 is a view of the state in which the terminal bodies 250, 250 of the acoustic device 221 of
the third embodiment are attached, viewed from the rear of the sheet 10. As shown in FIG. FIG. 6
is a perspective view of the terminal body 250. FIG. The acoustic device 221 includes a
diaphragm 22 (FIG. 2), an exciter 23, magnets 24, 24, a pair of exciter connection wires (not
shown) for electrically connecting the magnets 24, 24 and the exciter 23, a headrest Terminals
250, 250 attached to the stays 20, 20 are provided. The magnets 24 are fixed to the diaphragm
22 in a state of being electrically insulated from the diaphragm 22 via an insulating layer (not
shown).
[0038]
The terminal body 250 is formed in a substantially cylindrical shape in which a part of the side
surface is open, and has a substantially C shape in the axial direction. Each terminal body 250
includes a pair of locking rings 251 and 251 provided at both ends in the axial direction, a film
252 passed between the locking rings 251 and 251, and a terminal portion 253 formed on the
surface of the film 252. , And a wire 254 drawn from the terminal portion 253.
[0039]
The film 252 is a resin film having electrical insulation, and for example, polyimide is used. The
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terminal portion 253 is a conductive layer formed on the surface of the film 252, and is, for
example, a copper foil formed by etching. The film 252 is curved in a substantially C shape in the
axial direction. The locking rings 251, 251 are flexible rings formed in a substantially C-shape.
The ends of the wires 254, 254 drawn from the terminal portions 253, 253 are connected to a
device such as an amplifier (not shown) for driving the exciter 23.
[0040]
The terminal bodies 250, 250 are fitted on the outer peripheral portions of the headrest stays
20, 20 by expanding the substantially C-shaped open portion. The terminal body 250, 250 is
fixed to the headrest stay 20, 20 by the elastic force of the locking ring 251, 251 in the direction
of closing the substantially C-shaped open portion. The terminal bodies 250, 250 are attached
such that the terminal portions 253, 253 overlap the rear surface sides 20a, 20a of the headrest
stays 20, 20. The acoustic device 221 is fixed to the rear side 20a, 20a of the headrest stay 20,
20 by magnetic force by bringing the magnets 24, 24 into contact with the terminal portions
253, 253. Since the film 252 is thin, it does not affect the fixation by the magnets 24, 24. An
electrical signal for driving the exciter 23 is transmitted to the exciter 23 through the wires 254,
254, the terminal portions 253, 253, the magnets 24, 24, and the exciter connection wire.
[0041]
According to the third embodiment to which the present invention is applied, the terminal body
250, 250 attached to the outer peripheral portion of the pair of headrest stays 20, 20
respectively is provided, and the exciter 23 is connected to the terminal body 250, 250. Since the
electrical signal is transmitted, the electrical signal can be transmitted to the exciter 23 with a
simple configuration.
[0042]
In the third embodiment, the acoustic device 221 is fixed to the rear surface 20a, 20a of the
headrest stays 20, 20 by magnetic force by bringing the magnets 24, 24 into contact with the
terminal portions 253, 253. However, the present invention is not limited thereto.
For example, the magnets 24, 24 may be directly attached to the surfaces of the headrest stays
20, 20, and only the wires connected to the exciter 23 may be connected to the terminal portions
253, 253. Further, the configuration for transmitting an electrical signal to the exciter 23
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through the terminal bodies 250, 250 attached respectively to the outer peripheral portions of
the headrest stays 20, 20 is all of the first to eighth embodiments except the second embodiment.
The present invention is applicable to the configuration of the embodiment.
[0043]
Fourth Embodiment A fourth embodiment to which the present invention is applied will be
described below with reference to FIGS. 7 to 9. In the fourth embodiment, parts that are the same
as in the first embodiment are given the same reference numerals, and descriptions thereof will
be omitted. The fourth embodiment differs from the first embodiment in that a cover 355
covering the diaphragm 22 and the exciter 23 is provided.
[0044]
FIG. 7 is a perspective view of a state in which the acoustic device 321 of the fourth embodiment
is attached to the headrest stays 20, as viewed from the front side. FIG. 8 is a perspective view of
the acoustic device 321 as viewed from the front side. FIG. 9 is a view of the acoustic device 321
as viewed from below. The acoustic device 321 includes a diaphragm 22, an exciter 23, magnets
24 and 24, a cover 355 covering the diaphragm 22 and the exciter 23, and a pair of left and
right speakers 356 and 356 supported by the cover 355. That is, the acoustic device 321 is
obtained by adding the cover 355 and the speakers 356 and 356 to the acoustic device 21 of the
first embodiment.
[0045]
The cover 355 integrally includes a cover main body 357 covering the diaphragm 22 and the
exciter 23, and a pair of outer extension parts 358 and 358 extending outward from the cover
main body 357 to the left and right. The cover main body 357 includes a front wall 360 covering
the front surface 22a of the diaphragm 22 from the front side, a rear wall 361 covering the rear
surface 22b of the diaphragm 22 and the exciter 23 from the rear side, the diaphragm 22 and
the exciter 23 It integrally comprises an upper wall portion 362 covering from above. The lower
surface of the cover 355 is open. The cover 355 is, for example, a resin molded product.
[0046]
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15
The cover main body portion 357 includes a pair of left and right inner wall portions 363 and
363 connecting the front wall portion 360 and the rear wall portion 361 inside the cover main
body portion 357 at the left and right end portions. The inner wall portions 363 and 363 are
provided with substantially U-shaped groove portions 364 and 364 in a bottom view in which
the left and right end portions 22c of the diaphragm 22 are fitted. The end portions 22 c and 22
c are portions that protrude outward to the left and right of the magnets 24 and 24.
[0047]
The cover 355 is provided so as to cover the diaphragm 22 from above, and is attached to the
diaphragm 22 by fitting the end portions 22 c and 22 c of the diaphragm 22 into the groove
portions 364 and 364. A buffer member such as urethane may be provided between the groove
portions 364 and 364 and the end portions 22c and 22c. The diaphragm 22 has the end
portions 22c, 22c supported by the groove portions 364 and 364 so that the portion between
the end portions 22c, 22c of the diaphragm 22 vibrates freely. The front wall portion 360 has
openings 360a, 360a at positions overlapping the magnets 24, 24, and the front surfaces of the
magnets 24, 24 are exposed forward from the openings 360a, 360a. In addition, the front wall
portion 360 includes a front surface bulging portion 360 b that bulges forward at a central
portion between the openings 360 a and 360 a. A space in which the diaphragm 22 oscillates is
secured inward of the front bulging portion 360 b.
[0048]
The acoustic device 321 is attached to the headrest stays 20, 20 by the magnets 24, 24 being
magnetically attached to the rear side 20a, 20a (FIG. 1). The outwardly extending portions 358
and 358 of the cover 355 extend forward from the left and right ends of the cover main body
portion 357 and are located outward to the left and right of the headrest stays 20 and 20,
respectively. The outer extensions 358, 358 have speaker storage openings 365, 365 on the top
surface, and the speakers 356, 356 are supported so as to be fitted into the speaker storage
openings 365, 365.
[0049]
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The speakers 356, 356 are located outside the headrest stays 20, 20 and close to the occupants'
ears, so that the occupants can feel a good sound. In addition, the speakers 356, 356 are
provided in a state in which the diaphragm is inclined rearward so that the sound to be output is
directed to the front upper side. As a result, the sound of the speakers 356 and 356 can easily
reach the seater's ear in the upper front, so that even if the volume of the speakers 356 and 356
is reduced, the seater can feel the sound and the sound around the seat 10 It is possible to realize
a personal acoustic space that is unlikely to leak.
[0050]
According to the fourth embodiment to which the present invention is applied, the cover 355
covering the diaphragm 22 and the exciter 23 is attached to the diaphragm 22, so that the cover
355 can be attached with a simple structure, and the cover 355 is vibrated. Sound can be output
effectively. Further, the cover 355 can prevent a seated person or the like from touching the
diaphragm 22 and the exciter 23. Furthermore, since speakers 356, 356 are provided on the left
and right of headrest stays 20, 20 and the speakers 356, 356 are supported by the cover 355,
the speakers 356, 356 output sound at a position where the seat occupant can easily hear the
left and right. As well as being able to support the speakers 356 and 356 with a simple structure.
Also, magnets 24, 24 for fixing the diaphragm 22 to the headrest stays 20, 20 are provided on
the front surface 22a of the diaphragm 22, and the cover 355 is an opening 360a that exposes
the magnets 24, 24 to the headrest stays 20, 20 side. It has 360a. Therefore, even with the
configuration in which the cover 355 is provided, the diaphragm 22 can be easily fixed to the
headrest stays 20, 20 by the magnets 24, 24 exposed from the openings 360a, 360a. The
configuration in which the diaphragm is covered with a cover such as the cover 355 and the
speaker is provided on the cover is applicable to the configurations of all the first to eighth
embodiments.
[0051]
Fifth Embodiment A fifth embodiment to which the present invention is applied will be described
below with reference to FIGS. 10 and 11. FIG. In the fifth embodiment, parts that are the same as
in the first embodiment are given the same reference numerals, and descriptions thereof will be
omitted. The fifth embodiment is different from the first embodiment mainly in that the exciter
23 is provided at a portion where the diaphragm 422 bulges rearward.
[0052]
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FIG. 10 is a perspective view of the state where the acoustic device 421 of the fifth embodiment
is attached to the headrest stays 20, as viewed from the rear side. FIG. 11 is a plan view of the
acoustic device 421 as viewed from above. The acoustic device 421 includes a diaphragm 422
attached to the headrest stays 20 and 20, an exciter 23, and magnets 24 and 24. The diaphragm
422 is formed, for example, by bending a single plate. Diaphragm 422 has a pair of magnet
support plates 470 and 470 positioned at the left and right ends and provided with magnets 24
and 24, and a pair of left and right pairs extending backward from the inner ends of magnet
support plates 470 and 470. It includes a rear extension plate portion 471, 471 and a vibrator
support plate portion 472 connecting the rear ends of the rear extension plate portions 471, 471
to the left and right. That is, the rear extension plate portions 471 and 471 and the vibrator
support plate portion 472 constitute a bulging portion 473 protruding backward. The exciter 23
is fixed to the rear surface of the vibrator support plate portion 472. The magnet support plate
portions 470 and 470 are connection portions with the headrest stays 20 and 20, and are
attached to the rear side 20a and 20a via the magnets 24 and 24, respectively.
[0053]
The upper and lower widths of the magnet support plate portions 470, 470 are formed
substantially the same as the upper and lower widths of the magnets 24, 24, and the upper and
lower widths are relatively small. The front end of the rear extension plate portions 471 and 471
has the same width as that of the magnet support plate portions 470 and 470, but the upper and
lower widths are formed to be larger toward the rear side. Specifically, the lower edge 471a of
each rear extension plate portion 471 extends rearward substantially horizontally, and the upper
edge 471b is inclined rearward and upward. The upper and lower widths of the vibrator support
plate portion 472 are the same as the upper and lower widths of the rear end of the rear
extension plate portions 471 and 471, and the width is larger than the width of the magnet
support plate portions 470 and 470.
[0054]
In a state where the acoustic device 421 is attached, the vibrator support plate portion 472 is
positioned rearward of the rear surface 13a of the headrest 13, and the exciter 23 is also
positioned rearward of the rear surface 13a. For this reason, the headrest 13 does not interfere
with the arrangement of the exciter 23, and the exciter 23 can be easily attached. In the fifth
embodiment, the heights of the head rest 13 are adjusted because the width of the upper and
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lower ends of the magnet support plate portions 470 and 470 and the front end portions of the
rear extension plate portions 471 and 471 is small. Thus, even if the distance between the lower
surface of the headrest 13 and the upper surface 12a of the backrest 12 is small, the acoustic
device 421 can be attached to the headrest stays 20, 20 by the magnets 24, 24. In addition, the
strength and rigidity of the magnet support plate portions 470 and 470 are sufficiently secured
by attaching the magnets 24 and 24.
[0055]
According to the fifth embodiment to which the present invention is applied, the diaphragm 422
bulges more to the rear side of the seat 10 than the magnet support plate portions 470 and 470
which are connection portions with the pair of headrest stays 20 and 20. Since the exciter 23 is
provided on the bulging portion 473, the exciter 23 can be disposed on the rear side, and even if
the gap between the headrest 13 and the backrest 12 is small, the acoustic device is provided.
421 can be attached. The configuration in which the exciter 23 is provided on the bulging
portion 473 of the diaphragm that bulges rearward of the sheet 10 is applicable to the
configurations of the first to seventh embodiments excluding the eighth embodiment described
later. is there.
[0056]
Sixth Embodiment The sixth embodiment to which the present invention is applied will be
described below with reference to FIG. In the sixth embodiment, parts that are the same as in the
first embodiment are given the same reference numerals and descriptions thereof will be omitted.
The sixth embodiment is different from the first embodiment in that the acoustic device 521 is
attached to the headrest stays 20 and 20 by fastening instead of magnetic force.
[0057]
FIG. 12 is a perspective view of the sound device 521 according to the sixth embodiment
attached to the headrest stays 20, as viewed from the front side. The acoustic device 521
includes the diaphragm 22, the exciter 23, and a pair of mounting plates 576 and 576 provided
at left and right ends of the diaphragm 22. The mounting plates 576 and 576 have a front wall
576a opposite to the front surface 22a, side walls 576b and 567b extending from the left and
right edges of the front wall 576a to the front surface 22a, and a flange portion extending
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laterally from the rear end of the side walls 576b and 567b And 576c and 576c.
[0058]
The mounting plates 576, 576 are fixed to the front surface 22a via the flange portions 567c,
567c, whereby the diaphragm 22 is provided with cylindrical mounting portions 577, 577
through which the headrest stays 20, 20 pass in the vertical direction. Is formed. The mounting
portions 577, 577 have screw holes (not shown) in the front wall 576a, and screws 578, 578 are
tightened in the screw holes. The screw hole portion includes a tubular portion and an internal
thread portion provided on the inner periphery of the tubular portion.
[0059]
The acoustic device 521 is fixed to the headrest stays 20, 20 by the screws 578, 578 being
tightened so that the headrest stays 20, 20 are held between the tips of the screws 578, 578 and
the front face 22a. According to the sixth embodiment to which the present invention is applied,
the diaphragm 22 is fastened and fixed to the headrest stays 20 and 20 by the screws 578 and
578. Therefore, the acoustic device 521 can be mounted on the headrest stay 20 with a simple
structure. , 20 can be fixed.
[0060]
In the configuration in which the acoustic device 521 is fixed to the headrest stays 20 and 20 by
fastening, as in the second embodiment, the exciter 23 is electrically signaled by the electric
wires 140 and 140 arranged inside the backrest 12. As in the third embodiment, even if the
electrical signal is transmitted to the exciter 23 through the terminal bodies 250, 250 attached to
the outer peripheral portions of the headrest stays 20, 20, respectively. good.
[0061]
Seventh Embodiment The seventh embodiment to which the present invention is applied will be
described below with reference to FIG.
In the seventh embodiment, parts that are the same as in the first embodiment are given the
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same reference numerals, and descriptions thereof will be omitted. The seventh embodiment is
characterized in that the acoustic device 621 is attached via the arm portions 680, 680 provided
to push the headrest stays 20, 20 outward to the left and right. It is different from
[0062]
FIG. 13 is a perspective view of the acoustic device 621 according to the seventh embodiment
attached to the headrest stays 20, as viewed from the front. The acoustic device 621 includes a
flat diaphragm 622, an exciter 23 fixed to the rear surface of the diaphragm 622, and a pair of
arms 680 provided at left and right ends of the diaphragm 622. The diaphragm 622 is provided
with a pair of slits 681 and 681 linearly extending inward from the left and right side edges.
Each arm 680 is provided with an axially extending shaft portion 682, a connecting portion 683
provided at one end of the axial portion 682 and connected to the headrest stay 20, and an
axially extending engagement provided at the other end of the axial portion 682 A groove
portion 684 is provided. By forming the engagement groove portion 684, plate portions 685a
and 685b facing each other are formed on the other end side of the shaft portion 682. The plate
portion 685a has a through hole (not shown), and the plate portion 685b has a screw hole (not
shown). The plate portions 685a and 685b are provided with fixing screws 686 inserted into the
through holes and tightened into the screw holes.
[0063]
The connection portion 683 is a substantially semicircular ring-shaped member, and includes a
semicircular inner circumferential curved surface portion 683a and a semicircular outer
circumferential curved surface portion 683b. One end of the shaft portion 682 is coupled to the
circumferential center portion of the outer peripheral curved surface portion 683 b. The inner
peripheral curved surface portion 683a is fitted to the inner side surface portions 20d, 20d of
the headrest stays 20, 20. The radius of curvature of the inner circumferential curved surface
portion 683a is larger than the radius of curvature of the inner side surface portions 20d of the
headrest stays 20, 20d.
[0064]
The arm portions 680 and 680 are connected to the diaphragm 622 by the engagement grooves
684 and 684 engaging with the left and right ends of the diaphragm 622 and the fixing screws
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686 and 686 being inserted into the slits 681 and 681. Be done. The positions of the arms 680,
680 can be adjusted by moving the arms 680, 680 left and right along the slits 681, 681, and by
tightening the fixing screws 686, 686, the arms 680, 680 The position of is fixed.
[0065]
The acoustic device 621 is disposed between the headrest stays 20, 20, and the arm portions
680, 680 are fixed with screws 686 under the condition that the connecting portions 683, 683
exert a force to push the headrest stays 20, 20 outward to the left and right. The position is fixed
at 686. That is, the acoustic device 621 is fixed by the arm portions 680 and 680 so that the
headrest stays 20 and 20 are stretched from the inside.
[0066]
According to the seventh embodiment to which the present invention is applied, the diaphragm
622 includes arms 680, 680 which extend outward on the left and right and abut on the inner
side surfaces 20d of the pair of headrest stays 20, 20d. The arm portions 680, 680 are attached
so as to push the head rest stays 20, 20 outward to the left and right, via the inner peripheral
curved surface portions 683a, 683a along the inner side surface portions 20d, 20d. Therefore,
the acoustic device 621 can be easily attached to the headrest stays 20 and 20 through the arms
680 and 680. Furthermore, the inner peripheral curved surface portions 683a and 683a with
respect to the inner side surface portions 20d and 20d by the vibration of the diaphragm 622
Because it can move minutely, it is possible to escape shock-like vibration and improve the sound
quality.
[0067]
In the structure in which the acoustic device 621 is fixed to the headrest stays 20 and 20 by the
arms 680 and 680, as in the second embodiment, the exciter is excited by the electric wires 140
and 140 wired inside the backrest 12 as in the second embodiment. The electric signal may be
transmitted to the H. 23, and the electric signal may be transmitted to the exciter 23 through the
terminal bodies 250, 250 attached to the outer peripheral portions of the headrest stays 20, 20
as in the third embodiment. It may be transmitted.
[0068]
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22
Eighth Embodiment The eighth embodiment to which the present invention is applied will be
described below with reference to FIG.
In the eighth embodiment, parts that are the same as in the first embodiment are given the same
reference numerals, and descriptions thereof will be omitted. The eighth embodiment is different
from the first embodiment in that the acoustic device 721 is incorporated in the headrest 713.
[0069]
FIG. 14 is a perspective view of the acoustic device 721 of the eighth embodiment attached to a
headrest stay in a headrest 713 as viewed from the front side. Here, in FIG. 14, in order to show
the internal structure of the headrest 713, the front surface of the headrest 713 is shown in a
cutaway state. The seat 710 includes a seat portion 11 (FIG. 1), a backrest 12, and a headrest
713 attached to the upper end of the backrest 12.
[0070]
The headrest 713 includes a headrest cushion 19 and headrest stays 20 and 20. The headrest
stays 20, 20 include inner frame portions 790, 790 extending inside the headrest cushion 19 to
support the headrest cushion 19, and the upper ends of the inner frame portions 790, 790 are
connected to the left and right by the cross portion 791. .
[0071]
The acoustic device 721 includes a diaphragm 22 and an exciter 23. The acoustic device 721 is
disposed inside the headrest cushion 19 and provided between the inner frame portions 790 and
790. The front surface 22a of the diaphragm 22 is fixed to the rear surface sides 790a and 790a
of the cylindrical inner frame portions 790 and 790. The diaphragm 22 is fixed to the rear
surface sides 790a and 790a by the magnetic force of a magnet (not shown) provided on the
front surface 22a. The diaphragm 22 may be fastened and fixed to the rear side 790a and 790a
by a bolt or the like.
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23
[0072]
Further, a wire (not shown) for transmitting an electric signal to the exciter 23 is drawn out of
the exciter 23 to the outside of the headrest 713 and connected to equipment such as an
amplifier (not shown) disposed on the front side of the seat 710, for example. Ru. As in the
second embodiment, the headrest stays 20 and 20 may be provided with electric wires 140 and
140 (FIG. 4), and an electrical signal may be transmitted to the exciter 23 through the inner
frame portions 790 and 790. In this case, the cross portion 791 is made of an insulating
material, and the magnet is provided on the diaphragm 22 via the insulating layer, and a pair of
exciter connection wires electrically connecting the magnet and the exciter 23 is provided.
[0073]
According to the eighth embodiment to which the present invention is applied, the headrest stays
20, 20 include inner frame portions 790, 790 extending inside the headrest cushion 19 of the
headrest 713, and the diaphragm 22 is an inner frame portion 790. , 790, so that the diaphragm
22 and the exciter 23 can be disposed in a space-saving manner by utilizing the space inside the
headrest cushion 19, and the diaphragm 22 and the exciter 23 can be hidden inside the headrest
cushion 19. Good appearance.
[0074]
10, 710 Seat 12 Backrest 13, 713 Headrest 19 Headrest cushion (cushion) 20, 20 Headrest stay
20a, 20a, 790a, 790a Rear side 20d, 20d Inner side portion 21, 121, 221, 221, 421, 521, 621,
721 acoustic device 22, 422, 622 diaphragm 23 exciter 24, 24 magnet 140, 140 electric wire
250, 250 terminal body 355 cover 356, 356 speaker 360a, 360a opening 473 bulging portion
680, 680 arm portion 683a inside Curved surface (curved surface) 790, 790 Internal frame
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