JP2015222901A - Speaker device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker device provided at the front center of a vehicle, in which a favorable acoustic effect is obtained and foreign matters is prevented from entering an enclosure.SOLUTION: A space at the inside of 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 rear face of a speaker unit (40). The transmission path (70) comprises: a first transmission path (71) extending from the rear face of the speaker unit (40) to a rear end of the enclosure (30), and a second transmission path (72) turned back from a rear end of the first transmission path (71) to extend forward. The outlet of the second transmission path (72) comprises an opening (66) formed in the enclosure (30), and the opening (66) is located alongside a front end of the second transmission path (72).

Description

  The present invention relates to an improved vehicle speaker device.

  Audio devices are installed in many vehicles. The audio device is installed in the center of the instrument panel, and includes an audio main body that reproduces audio and a speaker device that outputs sound transmitted from the audio main body. Many speaker devices are installed on the side of a door or in the center of an instrument panel. For example, as in the technique disclosed in Patent Document 1, the speaker device is installed between a driver seat and a passenger seat. Also exist.

  In the invention disclosed in Patent Document 1, a center console is installed between a driver seat and a passenger seat, and a speaker device is attached using a space in the center console.

  By the way, since a shift lever, an armrest, etc. are also installed in the center console, the space that the speaker device can occupy is limited. As a result, the space of the enclosure to which the speaker unit is attached becomes narrow and it is difficult to obtain a good acoustic effect.

  In addition, as shown in FIG. 2 (b) of Patent Document 1, when the opening that radiates the sound wave radiated from the back surface of the speaker unit faces the upper surface, the opening enters the enclosure through the opening. Foreign matter such as dust and dust is likely to enter.

Japanese Utility Model Publication No. 63-18353

  It is an object of the present invention to provide a speaker device provided at the center of the front of a vehicle that obtains a good acoustic effect and suppresses the entry of foreign matter into the enclosure.

According to the first aspect of the present invention, there is provided a vehicle speaker device comprising: an enclosure extending rearward from the front center of the vehicle compartment; and a speaker unit attached to the front end portion of the enclosure and facing frontward. ,
The space inside the enclosure is partitioned by a flat plate, and is a transmission path that transmits sound waves emitted from the back surface of the speaker unit.
The transmission path is
A first transmission path extending from the rear surface of the speaker unit to the rear end of the enclosure;
A second transmission path that is folded back from the rear end of the first transmission path and extends forward,
The outlet of the second transmission path formed to radiate sound waves radiated from the back surface of the speaker unit into the vehicle interior is configured by an opening formed in the enclosure,
The vehicular speaker device is provided in which the opening is located on a side of a front end portion of the second transmission path.

  According to a second aspect of the present invention, preferably, the front end portion of the second transmission path is configured by a reflection wall that reflects sound waves radiated from the back surface of the speaker unit toward the opening.

  Preferably, the front end portion of the second transmission path is located in the vicinity of the front end portion of the enclosure.

  In the speaker device according to claim 1, the enclosure extends rearward from the front center of the passenger compartment. Therefore, the space in the enclosure constituting the present invention is wider than the space in the enclosure using a part of the space in the center console.

  Furthermore, the space inside the enclosure is partitioned by a flat plate and serves as a transmission path for transmitting sound waves emitted from the back surface of the speaker unit. The transmission path includes a first transmission path that extends from the rear surface of the speaker unit to the rear end of the enclosure, and a second transmission path that is folded back from the rear end of the first transmission path and extends forward. In other words, the sound wave transmission path from the back surface of the speaker unit until it is emitted into the vehicle is longer than the path that connects the back surface of the speaker unit and the sound wave outlet in a straight line.

  As described above, in the speaker device according to the present invention, since a long transmission path is configured by using a wide space in the enclosure and the sound wave is radiated to the passenger compartment, the back load horn type that enhances bass It becomes a speaker. Therefore, a good acoustic effect can be obtained.

  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, intrusion of foreign matter such as dust and dust into the enclosure can be suppressed as compared with the speaker device with the opening portion facing upward. In particular, it is possible to prevent a spilled beverage from entering the enclosure through the opening.

  The speaker device according to claim 2, wherein the front end portion of the second transmission path formed in the enclosure is configured by a reflection wall that reflects sound waves radiated from the back surface of the speaker unit toward the opening. Therefore, the sound wave transmitted through the transmission path does not stay in the enclosure in the vicinity of the opening serving as the outlet, and is easily output from the opening. Sound waves radiated from the back surface of the speaker unit can be radiated more reliably into the vehicle interior, and a better acoustic effect can be obtained.

  The speaker device according to claim 3, wherein the front end portion of the second transmission path is located in the vicinity of the front end portion 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 passenger compartment, that is, in the vicinity of the feet of the passenger.

  Here, a seat may be installed on the side of the center or rear of the enclosure. If the opening is positioned closer to the center of the enclosure, the sound wave is easily blocked by the sheet. On the other hand, in the invention according to this claim, since the opening is located in the vicinity of the occupant's feet, there is no obstacle between the opening and the occupant, and the sound wave efficiently reaches the occupant.

It is a top view of the vehicle interior in the vehicle in which the speaker apparatus for vehicles by the Example of this invention was provided. FIG. 2 is a perspective view of the vehicle compartment shown in FIG. 1. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 in FIG. FIG. 2 is a perspective view of the vehicle compartment shown in FIG. 1. It is a side view of the speaker apparatus for vehicles shown by FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the description, left and right refer to the left and right based on the vehicle occupant, and front and rear refer to the front and rear based on the traveling direction of the vehicle. In the figure, Fr indicates the front, Rr indicates the rear, L indicates the left when viewed from the occupant, R indicates the right when viewed from the occupant, Up indicates the top, and Dw indicates the bottom.
<Example>

  As shown in FIG. 1, in a vehicle 10, an instrument panel 12 is provided in a vehicle width direction at a front portion of a passenger compartment 11, and a steering wheel is located on the right side of the center of the vehicle width of the instrument panel 12. A wheel 13 is provided.

  A driver's seat 15 (front seat 15) on which a passenger who operates the steering wheel 13 is seated and a passenger seat 16 (front seat 16) in parallel with the driver's seat 15 are mounted on the floor 14 of the passenger compartment 11. It has been. Rear seats 17 and 18 are attached to the rear of the driver seat 15 and the passenger seat 16, respectively.

  The driver's seat 15 includes a seat cushion 15a and a seat back 15b. Similarly, the passenger seat 16 and the rear seats 17 and 18 include seat cushions 16a, 17a, and 18a and seat backs 16b, 17b, and 18b, respectively. Front doors 81 and 81 are respectively provided on the sides of the driver seat 15 and the passenger seat 16. Rear doors 82 and 82 are attached to the sides of the rear seats 17 and 18, respectively.

  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.

  A speaker device 20 is provided from the lower center of the instrument panel 12 toward the rear. The speaker device 20 includes an enclosure 30 which is a hollow box whose one end (front end) is swollen upward, and a speaker unit 40 which is attached to the swollen one end. The speaker unit 40 is located in the center of the instrument panel 12, and the front is facing rearward. The enclosure 30 is disposed between a support portion 15c that supports the driver's seat 15 and a support portion 16c that supports the passenger seat (reference numeral 16 in FIG. 1).

  As shown in FIG. 3, the enclosure 30 is formed integrally with a support portion 50 that supports the speaker unit 40 and a transmission portion 60 that transmits sound waves radiated from the back surface of the speaker unit 40.

  Referring also to FIG. 4, the transmission portion 60 includes a bottom surface portion 61 that has a rectangular shape in plan view, left and right side wall portions 62 and 62 that extend upward from both longitudinal ends of the bottom surface portion 61, and a bottom surface. A front wall portion 63 that extends upward from one end (front end) in the short direction of the portion 61; a rear wall portion 64 that extends upward so as to draw an arc from the other end (rear end) to the rear; These side wall parts 62 and 62, the front wall part 63, and the upper surface part 65 which covers and leaves a part of upper end of the rear wall part 64 are comprised.

  The front part of the upper surface part 65 is opened to communicate with the support part 50. In addition, a rectangular opening 66 serving as an outlet for the sound wave radiated from the back surface of the speaker unit 40 is formed in the side walls 62 and 62.

  The support portion 50 extends upward from both sides of the front portions of the side wall portions 62, 62, and then extends so as to draw a circular arc toward the center. And a back surface portion 52 that covers the open back surface (front surface) of the semi-cylindrical portion 51. The front surface (rear surface) has an opening so as to face rearward and obliquely upward, and the speaker unit 40 is attached to the opening.

  Next, the structure inside the enclosure 30 will be described. In particular, as shown in FIG. 3, the space inside the transmission unit 60 is partitioned by a flat plate 67 and serves as a transmission path 70 that transmits sound waves radiated from the back surface of the speaker unit 40.

  Specifically, the flat plate 67 extends upward from the front portion of the bottom surface portion 61 of the transmission portion 60 and extends to a degree exceeding half the height of the transmission portion 60, and the flat plate front wall portion 67a. A flat plate parallel part 67b extending in parallel with the bottom face part 61 from the upper end part of this to the front of the rear wall part 64. Accordingly, the first transmission path 71 extends from the rear surface of the speaker unit 40 to the rear end of the enclosure 30, and the second transmission path 72 is folded back from the rear end of the first transmission path 71 and extends forward. A transmission path 70 is formed.

  Referring also to FIG. 4, the outlet of the second transmission path 72 is constituted by openings 66 and 66 formed in the side walls 62 and 62. The openings 66, 66 are formed such that the front edge is along the flat plate front wall portion 67a and the upper edge is along the flat plate parallel portion 67b.

  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 15b. 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 using a part of the space in the general center console.

  Further, as shown in FIG. 3, the space inside the transmission portion 60 constituting the enclosure 30 is partitioned by the flat plate 67 including the flat plate front wall portion 67a and the flat plate parallel portion 67b, as described above. A transmission path 70 including a first transmission path 71 and a second transmission path 72 is formed.

  The sound wave radiated from the back surface of the speaker unit 40 travels along the first transmission path 71 toward the rear wall portion 64, reaches the rear wall portion 64, and then turns back toward the front wall portion 63. 4 is also referred to, and thereafter, the sound wave is radiated to the vehicle interior 11 from the openings 66 and 66 formed in the side walls 62 and 62. As described above, the sound wave output from the back surface of the speaker unit 40 does not go straight to the opening 66 but goes to the opening 66 so as to bypass the transmission path 70. Therefore, the sound wave passes through a long path before being radiated to the passenger 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 is obtained.

  Here, referring also to FIG. 5, the widths of the first transmission path 71 and the second transmission path 72 are both W having the same dimensions. 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 sectional area of the second transmission path 72 is larger than the sectional area of the first transmission path 71. . That is, since the second half of the path through which the sound wave passes becomes wider, attenuation of the sound wave can be suppressed.

  Referring again 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 a flat plate front wall portion 67a (reflection wall).

  If the opening 66 is formed more rearward and the front edge of the opening 66 and the flat plate front wall 67a are separated, the sound wave radiated from the back surface of the speaker unit 40 passes through the opening 66, The sound reaches the flat plate front wall 67a and the sound is trapped in the vicinity of the flat plate front wall 67a. However, if the front edge of the opening 66 is formed along the flat plate front wall 67a, the sound wave is reflected on the flat plate front wall 67a and is easily output from the opening 66 to the vehicle interior. Therefore, sound waves can be radiated more reliably into the vehicle interior, and a better acoustic effect can be obtained.

  The flat plate 67 may be only the flat plate parallel portion 67 b that eliminates the flat plate front wall portion 67 a and extends parallel to the bottom surface portion 61 from the vicinity of the center of the front wall portion 63. In this case, if the opening 66 is formed so that the front edge of the opening 66 extends along the front wall 63, the front wall 63 also serves as a reflection wall. Compared with the case where the flat front wall portion 67a is provided, the sound wave can be reflected with a simpler structure.

  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 positioned in the vicinity of the front end of the enclosure 30. In addition, as shown in FIG. 2, the speaker device 20 is provided from the lower center of the instrument panel 12 toward the rear. As a result, the opening 66 serving as the sound wave outlet is located in the lower center of the instrument panel 12, that is, in the vicinity of the feet of the passenger.

  Here, a driver's seat 15 and a passenger seat (FIG. 1, reference numeral 16) are installed on the side of the central portion or the rear portion of the enclosure 30. If the opening 66 is positioned at the center of the enclosure 40, the sound wave is easily blocked by the driver seat 15 and the passenger seat (FIG. 1, reference numeral 16). On the other hand, in the present invention, since the opening 66 is located near the occupant's feet, there is no obstacle between the opening 66 and the occupant, and sound waves can efficiently reach the occupant.

  In addition, the opening 66 is formed in the side wall 62. Therefore, intrusion of foreign matter such as dust and dust into the enclosure 30 can be suppressed as compared with the speaker device with the opening portion facing upward. In particular, it is possible to prevent a spilled beverage from entering the enclosure 30 from the opening.

  Next, as shown in FIG. 6, the end portions of the seat cushion 15a and the seat cushion 16a on the vehicle width center side are close to each other, and the rear end portion from the center portion of the enclosure 30 is disposed below these end portions. Has been. Therefore, a part of the enclosure 30 that is a convex portion with respect to the floor 14 is covered with the seat cushion 15a and the seat cushion 16a, and the appearance of the passenger compartment is increased.

  Further, a front side speaker unit 91 is installed in the lower part of the front part of the front door 81 so as to be embedded, and a rear side speaker unit 92 is installed in the upper part of the rear part of the rear door 82 so as to be embedded. Has been. In particular, as shown in FIG. 1, the speaker unit 91 is also provided in 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 different from each other. 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 arranged so that the positions in the front-rear direction are aligned. By aligning the position of the sound source, sound waves can be delivered to the passenger from the left and right in a balanced manner.

  The vehicle speaker device of the present invention is suitable for a passenger car.

10 ... Vehicle 12 ... Instrument panel 15a ... Seat cushion (driver's seat)
16a ... Seat cushion (passenger seat)
DESCRIPTION OF SYMBOLS 20 ... Speaker apparatus 30 ... Enclosure 40 ... Speaker unit 50 ... Support part 60 ... Transmission part 62 ... Side wall part 66 ... Opening part 70 ... Transmission path 71 ... 1st transmission path 72 ... 2nd transmission path 81 ... Front door 91 ... Front side Speaker unit

Claims (3)

A vehicle speaker device comprising: an enclosure extending rearward from the front center of the vehicle compartment; and a speaker unit attached to the front end of the enclosure and having a front side facing rearward,
The space inside the enclosure is partitioned by a flat plate, and is a transmission path that transmits sound waves emitted from the back surface of the speaker unit.
The transmission path is
A first transmission path extending from the rear surface of the speaker unit to the rear end of the enclosure;
A second transmission path that is folded back from the rear end of the first transmission path and extends forward,
The outlet of the second transmission path formed to radiate sound waves radiated from the back surface of the speaker unit into the vehicle interior is configured by an opening formed in the enclosure,
The vehicle speaker device, wherein the opening is located on a side of a front end portion of the second transmission path.   The vehicular speaker according to claim 1, wherein the front end portion of the second transmission path is configured by a reflecting wall that reflects sound waves radiated from the back surface of the speaker unit toward the opening. apparatus.   The vehicle speaker device according to claim 1, wherein a front end portion of the second transmission path is located in the vicinity of a front end portion of the enclosure.

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