JP6114093B2 - Vehicle speaker device - Google Patents

Description

  The present invention relates to a speaker device used when audio reproduction is performed in a vehicle interior.

2. Description of the Related Art Conventionally, a speaker device used for audio reproduction in a passenger compartment is known.
The speaker is generally installed in the instrument panel, installed inside the door, or installed on the rear parcel shelf.
By the way, outside the above-mentioned installation place, what has arrange | positioned the speaker to the front center part of a vehicle interior is known.

Japanese Utility Model Publication No. 63-18353

  In the invention according to Patent Document 1, a speaker is arranged in a center console provided in the front-rear direction at the center of a vehicle interior, and the speaker is installed in a space in a region behind a shift lever of the center console. .

  The invention according to Patent Document 1 described above incorporates a speaker having a low sound range in the center console so as to obtain a sense of reality, and is intended for effective use in the center console.

By the way, the center console is provided with a shift lever, requires an operating space for the shift lever, and further requires an installation space for devices such as an armrest.
Speakers are installed using the limited space in the center console, excluding these devices, and the speaker enclosure is secured in the extra small space in the center console. Becomes narrow and it is difficult to obtain a satisfactory acoustic effect.

The present invention has been made to solve the above problems.
The object of the present invention is to install a speaker that emits sound toward the rear of the vehicle interior, in front of the center of the vehicle interior, apart from the door, instrument panel, and rear parcel shelf. Provide a speaker device that suppresses attenuation as much as possible even if it is in charge of a low frequency range and has an excellent acoustic effect.

  The invention according to claim 1 is a speaker device for a vehicle in which a speaker is disposed at a lower portion of a central portion of an instrument panel disposed in a passenger compartment, and the speaker device is disposed at a lower portion of the central portion of the instrument panel. It consists of a speaker body that emits sound waves with the front facing inward and a transmission path that transmits sound waves radiated from the back of the speaker body to the vicinity of the front of the speaker body. The transmission path is from the back of the speaker body to the rear of the vehicle. And a second transmission path that is turned forward from the rear end of the first transmission path, and an outlet of the second transmission path is provided in the vicinity of the front of the speaker body. .

  The invention according to claim 2 is characterized in that the first transmission path and the second transmission path are arranged one above the other.

  The invention according to claim 3 is characterized in that upper portions of the first transmission path and the second transmission path are covered with cushions of left and right seats that are very close to each other in the left-right direction.

  The invention according to claim 4 is characterized in that the outlet of the second transmission path opens toward the upper side of the passenger compartment.

  The invention according to claim 5 is characterized in that the exit of the second transmission path is opened toward the upper side of the passenger compartment, and a guide plate portion standing up above the passenger compartment is provided in a portion near the speaker of the opening. To do.

  In the invention according to claim 1, the speaker device is configured to receive sound waves radiated from the back surface of the speaker main body and the speaker main body that emits sound waves with the front facing the vehicle interior side at the lower part of the center of the instrument panel. A transmission path that transmits to the vicinity of the front of the speaker body, the transmission path extending from the back of the speaker body to the rear of the vehicle, and a second that is folded forward from the rear end of the first transmission path. Since the exit of the second transmission path is provided in the vicinity of the front of the speaker body, a backload horn type speaker with high energy efficiency is installed using the space in the front center of the vehicle interior. As a result, a vehicle speaker device having an excellent acoustic effect can be obtained.

  In the invention according to claim 2, in claim 1, since the first transmission path and the second transmission path are arranged one above the other, a long transmission path can be provided in a limited front and rear space.

  In addition, the present invention can secure a large cabinet with a large volume on the back side of the speaker body by providing a transmission path that reciprocally overlaps the first transmission path and the second transmission path. To efficiently transmit sound waves radiated from the back side of the speaker, suppress the attenuation of sound waves as much as possible, and have an outlet facing the front of the speaker body to obtain a speaker device with excellent low-frequency output. Can do.

  In the invention according to claim 3, since the upper part of the first transmission path and the second transmission path is covered with the cushions of the left and right seats that are very close to each other in the left-right direction, the appearance of the vehicle interior is not impaired.

  In the invention according to claim 4, the upper and lower transmission paths are arranged so that the outlet of the upper second transmission path is open toward the upper side of the passenger compartment. , Mainly low-frequency sound waves radiated from the back are suppressed as much as possible, and synthesized with sound waves radiated from the front, it is possible to obtain a speaker device with extremely low-frequency characteristics that tend to diffuse it can.

  In the invention according to claim 5, the exit of the second transmission path opens toward the upper part of the passenger compartment, and a guide plate portion that stands up above the passenger compartment is provided in a portion near the speaker of the opening. The effect of 4 can be achieved more reliably.

It is a top view which shows the vehicle interior of the vehicle provided with the speaker apparatus which concerns on this invention. It is a perspective view of a vehicle interior. 1 is a perspective view of a speaker device according to the present invention by removing one of left and right seats in a perspective view of a vehicle interior. It is a vertical side view of a speaker apparatus. FIG. 5 is a sectional view taken along line 5-5 of FIG. The longitudinal side view of the other Example of a speaker apparatus is shown, and it is sectional drawing similar to FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a plan view showing a vehicle interior of a vehicle equipped with a speaker device according to the present invention, and FIG. 2 is a perspective view of the vehicle interior.
Reference numeral 1 denotes a vehicle. In the embodiment, front and rear, left and right doors 2A, 2B, 2C, and 2D are provided. Reference numeral 3 denotes a front instrument panel in the passenger compartment 8. Seats 5A, 5B, 6A and 6B, the left and right front seats 5A and 5B have a bench seat-like shape in which the opposite ends of the seat cushions 5a and 5a are very close to each other, and the seat backs 5b and 5b are angle-adjusted. FIG. 2 shows a state in which the seat backs of the front and rear seats 5A, 5B, 6A, 6B are tilted backward.

Speakers 7A and 7B are installed in the doors 2A, 2B, 2C, and 2D. FIG. 2 shows the speakers 7A and 7B on the right door 2A and 2C side, but the speakers are installed at the same position on the left door. ing.
Although not shown in the drawing, two tweeters on the left and right sides are installed in the both sides of the instrument panel 3 and the left and right sides of the rear portion of the passenger compartment 8, for example, the rear parcel shelf.

FIG. 3 is a perspective view of the front part of the passenger compartment 8. A steering wheel 9 is provided on the driver seat 3A side of the front surface of the instrument panel 3, and a shift knob 10 is provided on the side thereof.
At the center of the dashboard 11 in the lower part of the instrument panel 3 in the vehicle width direction, a duct part 12 is provided so that the upper part is connected to the center part of the instrument panel 3 so as to face the rear in the passenger compartment 8. The cone front surface 21a of the speaker main body 21 is housed and installed in the vertical wall portion 12a of 12 so as to face the rear in the passenger compartment 8.
Reference numerals 5c and 5c denote support rails that support the side portions of the seat cushions 5a and 5a of the front seats 5A and 5A.

The speaker device 20 is installed at the center in the vehicle width direction inside the cabin 8 of the instrument panel 3 so as to face the rear of the cabin 8.
4 is a longitudinal side view of the speaker device, and FIG. 5 is a sectional view taken along line 5-5 of FIG.
The speaker device according to the present invention will be described with reference to FIGS.

The speaker device 20 includes a speaker body 21 and a cabinet 25 constituting an enclosure.
The cabinet 25 has a length in the front-rear direction. For example, the cabinet 25 is set to a length from the center of the dashboard 11 at the bottom of the instrument panel 3 to the rear and below the boundary between the left and right seats 5A and 5B. Yes.

The cabinet 25 is installed on the floor 4, is installed in the center part in the vehicle width direction, and has a shape having a length in the front-rear direction in the passenger compartment 8.
The longitudinal direction intermediate portion 25b to the rear portion 25c of the cabinet 25 are disposed below the opposing edges of the left and right seats 5A and 5B, and the upper surfaces thereof are covered with the seat cushions 5a and 5a.
The cabinet 25 is a hollow box-like body that includes a front part 25a joined and supported at the lower part of the dashboard 11, and the above-described intermediate part 25b and rear part 25c connected to the front part, and is long in the front and rear. The middle part 25b to the rear part 25c, which have a bulged space with a large volume and are integrally connected to the front part, extend in the front-rear direction in a tubular shape, and the rear end part 25d bulges back in an arc to form a continuous part.

The front portion 25a has a large volume in the top and bottom and front and rear, and has a mounting plate portion 25e inclined downward and rearward in the lower part in the passenger compartment 8, and a large-diameter mounting hole 25f is opened in this portion. In the embodiment, the speaker main body 21 of the cone type speaker is fitted into the hole 25f, and the peripheral flange portion 22a of the frame 22 is attached.
The speaker body 21 is a woofer for low-frequency range reproduction in the embodiment, and a front surface 23 facing the inside of the passenger compartment 8 is open to the inside of the passenger compartment 8.
The back surface 24 including the magnet portion and the back plate of the speaker main body 21 is disposed so as to project downward in the air chamber 26 having a large volume in the front portion 25 a of the cabinet 25.

The portion of the rear portion 26a in the air chamber 26 of the front portion 25a described above forms a curved wall 25g that curves downward and rearward, and a rectangular space with a cylindrical cross section is formed rearward from the curved wall 25g. It is formed towards.
The space 28 is vertically divided by a lateral partition wall 27 extending rearward from the curved wall 25g, and its cross section has a “day” shape as shown in FIG.

The upper and lower spaces 28 and 29 are partitioned by the partition wall 27, the front portion 27a of the partition wall 27 is integrally connected to the rear portion below the curved wall 25g, and the rear end portion 27b is in front of the rear end portion 25d. A horizontal “U” -shaped communication space 30 that connects the upper and lower spaces 28 and 29 is formed between the inner wall surface 25 h of the rear end portion 25 d of the cabinet 25.
A lower first transmission path 28 and an upper second transmission path 29 that are partitioned vertically by a partition wall 27 are formed, and the upper and lower transmission paths 28 and 29 communicate with each other through a communication space 30 at the rear end. .

The upper second transmission path (upper space) 29 extends forward, the front end portion 29a opens obliquely forward upward 31 to form an outlet, and the opening 31 serving as the outlet is formed on the front surface 23 of the speaker body 21 described above. Open to the bottom at the rear.
In the example, the both sides and the rear of the opening 31 were surrounded by a bank piece 32 in a plan view concave shape with the front open (see FIG. 3).

The first transmission path 28 and the second transmission path 29 communicated with each other through the communication path 30 at the rear end portion are arranged in the middle portion 25b to the rear portion 25c of the cabinet 25 so as to overlap each other as shown in FIG. The horizontal dimension W is the same.
The height H2 of the upper transmission path 29 is greater than the height H1 of the lower transmission path 28.
As a result, the cross-sectional area of the second transmission path 29 is larger than the cross-sectional area of the first transmission path 28.

  As described above, the cabinet 25 is provided in the front-rear direction at the center in the vehicle width direction in the passenger compartment 8, and the front surface 23 of the speaker body 21 is opened toward the upper rear side of the passenger compartment 8. The rear surface 24 faces the large volume air chamber 26 in the front portion 25a of the cabinet 25, and upper and lower transmission paths 28 and 29 are provided in communication with the communication portion 30 at the rear end portion behind the air chamber 26. A front end portion of the upper transmission path 29 constitutes a speaker device 20 related to a backloaded horn speaker having an opening 31 in front of the front surface 23 of the speaker body 21.

As described above, as shown in FIG. 4, in the speaker device 20, sound waves are radiated from the front surface 23 of the speaker body 21 toward the rear in the passenger compartment 8 as indicated by an arrow a during sound reproduction.
On the other hand, the sound wave from the back surface 24 is radiated to the air chamber 26 of the cabinet 25 as indicated by an arrow b, and travels backward as indicated by an arrow c via the upstream throat portion 33 to the lower first transmission path 28. Then, it turns back from the rear end portion of the first transmission path 28 as shown by an arrow d, passes through the communication path 30, reaches the upper second transmission path 29, proceeds forward as shown by an arrow e, and passes through the opening 31 at the front end portion. The light is emitted toward the front surface 23 side of the main body 21 and reaches into the passenger compartment 8.

At this time, the upper second transmission path 29 has a larger passage cross-sectional area than the lower first transmission path 28, so vibration and therefore sound wave attenuation is small, and the transmission path 28.29 has a larger cross-sectional area. Since it is straight and there is no baffle plate inside, the transmission of sound waves is output from the opening 31 without being attenuated.
Accordingly, the low-frequency sound waves radiated from the back surface are suppressed from being attenuated as much as possible with respect to the high and middle sound waves radiated from the front surface 23 of the speaker body 21 and are radiated from the opening 31 near the front surface 23. A speaker device that is synthesized with sound waves radiated from the front surface 23 and has extremely low-frequency characteristics that tend to diffuse can be obtained.

In particular, in the present invention, a first transmission path 28 and a second transmission path 29 are provided on the rear side of the air chamber 26 near the instrument panel 3 on the back surface 24 side of the speaker body 21 so as to overlap and reciprocate. be able to.
Therefore, a large cabinet volume can be secured on the back surface 24 side of the speaker main body 21, and the upper cross-sectional area of the upper second transmission path 29 after the folding is large, so that from the back surface 24 side of the speaker main body 21. Since the attenuation of the radiated sound wave is suppressed as much as possible, and the outlet opening 31 faces the front surface 23 of the speaker body 21, a speaker device having excellent low-frequency output and excellent acoustic effect can be obtained. .

FIG. 6 shows a longitudinal side view of another embodiment of the speaker device, and is a cross-sectional view similar to FIG.
Since the basic structure is the same as that of the above-described embodiment, the same parts are denoted by the same reference numerals, and detailed description thereof is omitted.
In the present embodiment, a guide plate portion 34 that is curved upward and rearward in the passenger compartment 8 is installed upright at the front end portion of the opening 31 that constitutes the outlet of the second transmission path 29, and the outlet opening of the transmission path 29 is The sound wave radiated from 31 has a directivity in the upward and backward direction of the passenger compartment as indicated by an arrow f to further improve acoustic characteristics.

  The present invention can be used for an audio device installed in a vehicle interior of a vehicle.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 8 ... Vehicle compartment, 3 ... Instrument panel, 5A, 5B ... Left and right seats, 5a ... Seat cushion, 20 ... Speaker device, 21 ... Speaker main body, 23 ... Front of speaker main body, 24 ... Speaker main body Back surface 28 ... 1st transmission path, 29 ... 2nd transmission path, 30 ... Communication part which is a folding | returning part, 31 ... Opening which is an exit, 34 ... Guide plate part.

Claims (4)

A vehicle speaker device in which a speaker is arranged at the lower part of the center of an instrument panel arranged in a vehicle interior,
The speaker device has a speaker body arranged at the lower part of the center part of the instrument panel so as to emit a sound wave with its front facing the vehicle interior side,
A boundary between left and right seats from the lower part of the central portion of the instrument panel to define a transmission path that is installed on the floor and transmits sound waves radiated from the back of the speaker body to the vicinity of the front of the speaker body It consists of a cabinet that extends to the lower position of the part and is covered with cushions of the left and right seats ,
The transmission path includes a first transmission path extending from the back of the speaker body to the rear of the vehicle, and a second transmission path folded back from the rear end of the first transmission path.
The exit of the second transmission path is provided near the front of the speaker body.
A speaker device for a vehicle.   The vehicle speaker device according to claim 1, wherein the first transmission path and the second transmission path are arranged so as to overlap each other. The speaker device for a vehicle according to claim 1 or claim 2, characterized in that the outlet of the second transmission path is open upward of the vehicle compartment. Outlet of the second transmission path is open upward of the vehicle compartment, the portion close to the speaker of the opening, according to claim 3, characterized in that a guide plate portion erecting the cabin upwardly Vehicle speaker device.

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