JP2015222901

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DESCRIPTION JP2015222901
An object is to provide a speaker device provided at the center of the front of a vehicle to obtain
a good acoustic effect and to suppress the entry of foreign matter into an enclosure. A space
inside an enclosure (30) is partitioned by a flat plate (67), and serves as a transmission path (70)
for transmitting an acoustic wave emitted from the back of a speaker unit (40). The transmission
path (70) is folded back from the first transmission path (71) extending from the rear surface of
the speaker unit (40) to the rear end of the enclosure (30) and the rear end of the first
transmission path (71) And a second transmission path (72) extending toward the end. The outlet
of the second transmission path (72) is constituted by an opening (66) formed in the enclosure
(30), the opening (66) being located laterally of the front end of the second transmission path
(72) doing. [Selected figure] Figure 2
Speaker device for vehicle
[0001]
The present invention relates to an improved vehicle speaker device.
[0002]
Audio devices are installed in many vehicles.
The audio device is disposed at the center of the instrument panel, and comprises an audio body
for reproducing audio and a speaker device for outputting sound transmitted from the audio
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body. Many of the speaker devices are installed on the side of the door or in the center of the
instrument panel. For example, as in the technique disclosed in Patent Document 1, the speaker
device installed between the driver's seat and the passenger seat It also exists.
[0003]
In the invention disclosed in Patent Document 1, a center console is installed between a driver's
seat and a front passenger seat, and a speaker device is attached using a space in the center
console.
[0004]
By the way, since a shift lever, an armrest, etc. are installed in a center console, the space which a
speaker apparatus can occupy is limited.
As a result, the space of the enclosure in which the speaker unit is mounted is narrowed, and it is
difficult to obtain a good acoustic effect.
[0005]
In addition, as shown in FIG. 2 (b) of Patent Document 1, when the opening for emitting the
sound wave emitted from the back of the speaker unit into the car is directed to the top, the
opening can be introduced into the enclosure Foreign matter such as dust and dust can easily
invade.
[0006]
Japanese Utility Model Application Publication No. 63-18353
[0007]
An object of the present invention is to provide a speaker device provided at the center of a front
portion of a vehicle, to obtain a good acoustic effect and to suppress the entry of foreign matter
into an enclosure.
[0008]
According to the invention of claim 1, there is provided a vehicle speaker apparatus comprising:
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an enclosure extending rearward from a front center of a vehicle cabin; and a speaker unit
attached to a front end of the enclosure and having a front facing rearward. The internal space of
the enclosure is divided by a flat plate and serves as a transmission path for transmitting an
acoustic wave emitted from the back surface of the speaker unit, and the transmission path
extends from the back surface of the speaker unit to the rear end of the enclosure A first
transmission path and a second transmission path which is folded back from the rear end of the
first transmission path and extends forward, and radiates a sound wave emitted from the back of
the speaker unit into the vehicle compartment The outlet of the second transmission path, which
is formed on the front side, is constituted by an opening formed on the enclosure and Opening,
vehicle speaker apparatus characterized by being located on the side of the front end portion of
the second transmission path is provided.
[0009]
As described in claim 2, preferably, the front end portion of the second transmission path is
constituted by a reflecting wall that reflects the sound wave emitted from the back surface of the
speaker unit toward the opening.
[0010]
As described in claim 3, preferably, the front end of the second transmission path is located near
the front end of the enclosure.
[0011]
The speaker device according to claim 1, wherein the enclosure extends rearward from the front
center of the cabin.
Therefore, the space in the enclosure constituting the present invention is wider than the space
in the enclosure utilizing a part of the space in the center console.
[0012]
Furthermore, the space inside the enclosure is partitioned by a flat plate, and is a transmission
path for transmitting the sound wave emitted from the back of the speaker unit.
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The transmission path includes a first transmission path extending from the rear surface of the
speaker unit to the rear end of the enclosure, and a second transmission path folded back from
the rear end of the first transmission path and extending forward.
That is, the transmission path of the sound wave from the rear surface of the speaker unit to the
emission into the car is longer than the path connecting the rear surface of the speaker unit and
the sound wave outlet in a straight line.
[0013]
As described above, in the speaker device according to the present invention, a back-load horn
type that enhances the low-pitched sound by using a large space in the enclosure and forming a
long transmission path until the sound wave is radiated to the vehicle compartment. It becomes a
speaker.
Therefore, a good acoustic effect is obtained.
[0014]
Further, in the speaker device according to claim 1, the outlet of the second transmission path is
constituted by an opening formed in the enclosure, and the opening is located on the side of the
front end of the second transmission path.
Therefore, it is possible to suppress the entry of foreign matter such as dust and dirt into the
enclosure than the speaker device whose opening faces the top.
In particular, spilled beverage can be prevented from entering the enclosure through the
opening.
[0015]
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The speaker device according to claim 2, wherein a front end portion of the second transmission
path formed in the enclosure is constituted by a reflecting wall that reflects an acoustic wave
emitted from the back surface of the speaker unit toward the opening. Therefore, the sound
waves transmitted through the transmission path do not stay in the enclosure near the opening
serving as the outlet, and are likely to be output from the opening. Sound waves emitted from the
back of the speaker unit can be more reliably emitted into the vehicle compartment, and a better
acoustic effect can be obtained.
[0016]
The speaker device according to claim 3, wherein the front end of the second transmission path
is located near the front end of the enclosure. As described above, the enclosure extends
rearward from the front center of the passenger compartment, and the opening is located at the
front end of the second transmission path. Therefore, the opening serving as the sound wave
outlet is located at the front center of the cabin, that is, near the foot of the occupant.
[0017]
Here, a seat may be installed on the side of the central part or the rear part of the enclosure. If
the opening is located near the center of the enclosure, the sound wave is likely to be blocked by
the sheet. On the other hand, in the invention according to the present claim, since the opening is
located near the foot of the occupant, there is no obstacle between the opening and the occupant,
and the sound wave can efficiently reach the occupant.
[0018]
FIG. 1 is a plan view of a cabin in a vehicle provided with a vehicle speaker device according to
an embodiment of the present invention. It is a perspective view of the compartment shown by
FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2; It is line 4-4 sectional drawing of
FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 3; It is a perspective view of the
compartment shown by FIG. It is a side view of the speaker apparatus for vehicles shown by FIG.
[0019]
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Embodiments of the present invention will be described below based on the attached drawings.
In the description, the left and right refer to the left and right with respect to the occupant of the
vehicle, and the front and back refer to the front and back with respect to the traveling direction
of the vehicle. Further, in the figure, Fr indicates the front, Rr indicates the rear, L indicates the
left of the occupant, R indicates the right of the occupant, Up indicates the upper, and Dw
indicates the lower. <Example>
[0020]
As shown in FIG. 1, in the vehicle 10, an instrument panel 12 is provided in the vehicle width
direction at the front of the compartment 11, and steering is performed to the right of the vehicle
width center of the instrument panel 12. A wheel 13 is provided.
[0021]
A driver's seat 15 (front seat 15) on which a passenger operating the steering wheel 13 is seated
and a passenger seat 16 (front seat 16) parallel to the driver's seat 15 are mounted on the floor
14 of the passenger compartment 11 It is done.
Rear seats 17 and 18 are attached to the rear of the driver's seat 15 and the passenger seat 16,
respectively.
[0022]
The driver's seat 15 comprises a seat cushion 15a and a seat back 15b. Similarly, the front
passenger seat 16 and the rear seats 17 and 18 also include seat cushions 16a, 17a and 18a, and
seat backs 16b, 17b and 18b, respectively. Front doors 81 and 81 are provided on the sides of
the driver's seat 15 and the passenger's seat 16, respectively. Rear doors 82, 82 are attached to
the sides of the rear seats 17, 18, respectively.
[0023]
As shown in FIG. 2, in addition to the steering wheel 13, the instrument panel 12 is provided with
a shift lever 83 on the left side of the steering wheel 13 and a display 84 on the front side.
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[0024]
In addition, a speaker device 20 is provided rearward from the lower center of the instrument
panel 12.
The speaker device 20 includes an enclosure 30 which is a hollow box body having one end
(front end) bulged upward, and a speaker unit 40 attached to the bulged end. The speaker unit
40 is located at the center of the instrument panel 12 and the front is facing the back. The
enclosure 30 is disposed between a support 15 c supporting the driver's seat 15 and a support
16 c supporting the passenger seat (16 in FIG. 1).
[0025]
As shown in FIG. 3, the enclosure 30 is integrally formed with a support portion 50 for
supporting the speaker unit 40 and a transmission portion 60 for transmitting an acoustic wave
emitted from the back surface of the speaker unit 40.
[0026]
FIG. 4 is also referred to, and the transmission portion 60 has a bottom portion 61 having a
rectangular shape in a plan view, left and right side wall portions 62 and 62 extending upward
from both ends in the longitudinal direction of the bottom portion 61, and a bottom surface A
front wall 63 extending upward from one end (front end) in the lateral direction of the portion
61, and a rear wall 64 extending upward so as to draw a circular arc from the other end (rear
end) backward; The side wall portions 62 and 62, the front wall portion 63, and the upper
surface portion 65 which covers and covers a part of the upper end of the rear wall portion 64.
[0027]
The front portion of the upper surface 65 is open to communicate with the support 50.
In the side walls 62 and 62, a rectangular opening 66 is formed which serves as an outlet for
sound waves radiated from the back of the speaker unit 40.
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[0028]
The support portions 50 extend upward from the front sides of the side wall portions 62, 62, and
then extend in a circular arc toward the center of each other, and are formed from the semicylindrical portion 51 and the front wall 63 And a back surface portion 52 covering the open
back surface (front surface) of the semi-cylindrical portion 51.
The front surface (rear surface) is open to face rearward and obliquely upward, and the speaker
unit 40 is attached to the opening.
[0029]
Next, the internal structure of the enclosure 30 will be described. In particular, as shown in FIG.
3, the internal space of the transmission unit 60 is divided by the flat plate 67 and serves as a
transmission path 70 for transmitting an acoustic wave emitted from the back surface of the
speaker unit 40.
[0030]
More specifically, the flat plate 67 extends upward from the front of the bottom portion 61 of the
transmission portion 60 and extends to an extent exceeding half of the height dimension of the
transmission portion 60, and the flat front wall portion 67a. And a flat plate parallel portion 67 b
extending in parallel to the bottom surface portion 61 from the upper end portion to the front
side of the rear wall portion 64. Thereby, it comprises a first transmission path 71 extending
from the back surface of the speaker unit 40 to the rear end of the enclosure 30, and a second
transmission path 72 folded back from the rear end of the first transmission path 71 and
extending forward. The transmission path 70 is formed.
[0031]
Referring also to FIG. 4, the outlet of the second transmission path 72 is constituted by the
openings 66, 66 formed in the side walls 62, 62. The openings 66, 66 are formed such that the
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front edge is along the flat plate front wall portion 67a and the upper edge is along the flat plate
parallel portion 67b.
[0032]
Next, the operation of the present invention will be described. As shown in FIG. 2, the enclosure
30 extends from the center of the instrument panel 12 to the rear end of the seat back 15 b.
Therefore, the space in the enclosure 30 constituting the speaker device 20 according to the
present invention is wider than the space in the enclosure utilizing a part of the space in a
general center console.
[0033]
Furthermore, as shown in FIG. 3, as described above, the space inside the transmission unit 60
constituting the enclosure 30 is divided by the flat plate 67 consisting of the flat plate front wall
portion 67a and the flat plate parallel portion 67b. A transmission path 70 consisting of the first
transmission path 71 and the second transmission path 72 is formed.
[0034]
The sound wave radiated from the back surface of the speaker unit 40 travels along the first
transmission path 71 toward the rear wall 64, and after reaching the rear wall 64, turns back and
travels toward the front wall 63.
Referring also to FIG. 4, the sound waves are then emitted to the passenger compartment 11
from the openings 66, 66 formed in the side walls 62, 62. In this way, the sound wave output
from the rear surface of the speaker unit 40 does not go straight to the opening 66, but goes to
the opening 66 so as to detour via the transmission path 70. As a result, the sound wave passes
through the long path by the time it is radiated to the vehicle compartment through the opening
66 and the bass is enhanced. As a result, the speaker device 20 according to the present
invention becomes a back load horn type speaker, and a good acoustic effect can be obtained.
[0035]
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Here, referring to FIG. 5 together, the widths of the first transmission path 71 and the second
transmission path 72 are W of the same dimension. However, since the height dimension H2 of
the second transmission path 72 is larger than the height dimension H1 of the first transmission
path 71, the cross sectional area of the second transmission path 72 is larger than the cross
sectional area of the first transmission path 71. . That is, since the second half of the path
through which the sound wave passes becomes wide, attenuation of the sound wave can be
suppressed.
[0036]
Again referring to FIG. 3, the front edge of the opening 66 is formed along the flat plate front
wall 67a. That is, the vicinity of the front edge of the opening 66 in the second transmission path
72 (the front end of the second transmission path 72) is configured by the flat plate front wall
portion 67a (reflection wall).
[0037]
If the opening 66 is formed more rearward and the front edge of the opening 66 and the flat
plate front wall 67a are apart, the sound wave emitted from the back of the speaker unit 40
passes through the opening 66, It reaches the flat plate front wall portion 67a, and the sound is
trapped in the vicinity of the flat plate front wall portion 67a. However, if the front edge of the
opening 66 is formed along the flat front wall 67a, the sound wave is reflected by the flat front
wall 67a and is easily output from the opening 66 into the vehicle compartment. Therefore,
sound waves can be more reliably emitted into the vehicle compartment, and a better acoustic
effect can be obtained.
[0038]
The flat plate 67 may have only the flat plate parallel portion 67 b extending from the vicinity of
the center of the front wall portion 63 in parallel to the bottom surface portion 61 without using
the flat front wall portion 67 a. In this case, if the opening 66 is formed so that the front edge of
the opening 66 follows the front wall 63, the front wall 63 doubles as a reflecting wall. As
compared with the case where the flat plate front wall portion 67a is provided, sound waves can
be reflected with a simpler structure.
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[0039]
Further, the vicinity of the front edge of the opening 66 in the second transmission path 72 (the
front end of the second transmission path 72) is located near the front end of the enclosure 30.
In addition, as shown in FIG. 2, the speaker device 20 is provided rearward from the lower center
of the instrument panel 12. As a result, the opening 66 serving as the sound wave outlet is
located at the lower center of the instrument panel 12, that is, near the foot of the occupant.
[0040]
Here, a driver's seat 15 and a front passenger's seat (FIG. 1, reference numeral 16) are installed
on the side of the central part or the rear of the enclosure 30. If the opening 66 is located at the
center of the enclosure 40, the sound wave is likely to be blocked by the driver's seat 15 and the
passenger seat (FIG. 1, symbol 16). On the other hand, in the present invention, since the opening
66 is located near the foot of the occupant, there is no obstacle between the opening 66 and the
occupant, and the sound wave efficiently reaches the occupant.
[0041]
In addition, the opening 66 is formed in the side wall 62. Therefore, it is possible to suppress the
entry of foreign matter such as dust and dirt into the enclosure 30 than the speaker device
whose opening faces the upper surface. In particular, spilled beverage can be prevented from
intruding into the enclosure 30 through the opening.
[0042]
Next, as shown in FIG. 6, the end portions of the seat cushion 15a and the vehicle width center
side of the seat cushion 16a are close to each other, and the rear end from the central portion of
the enclosure 30 is disposed below these ends. It is done. Therefore, a part of the enclosure 30,
which is a convex portion with respect to the floor 14, is covered by the seat cushion 15a and the
seat cushion 16a, and the appearance of the passenger compartment is enhanced.
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[0043]
Also, the front side speaker unit 91 is installed in the lower part of the front of the front door 81
so as to be embedded, and the rear side speaker unit 92 is installed in the upper part of the rear
of the rear door 82 so as to be embedded It is done. In particular, as shown in FIG. 1, the speaker
unit 91 is also provided on the front door 81 on the passenger seat 16 side, and the left and right
speaker units 91 and 91 and the opening 66 formed in the enclosure 30 are It is arranged on a
straight line. When viewed from the side, as shown in FIG. 7, the speaker unit 91 and the opening
66 are disposed so as to be aligned in the front-rear direction. By aligning the positions of the
sound sources, sound waves can be delivered to the occupant from the left and right in a
balanced manner.
[0044]
The vehicle speaker device of the present invention is suitable for a passenger car.
[0045]
DESCRIPTION OF SYMBOLS 10 ... Vehicle 12 ... Instroment panel 15a ... Seat cushion (driver's
seat) 16a ... Seat cushion (passenger seat) 20 ... Speaker apparatus 30 ... Enclosure 40 ... Speaker
unit 50 ... Support part 60 ... Transmission part 62 ... Side wall part 66 ... Opening 70:
Transmission path 71: First transmission path 72: Second transmission path 81: Front door 91:
Front side speaker unit
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