JP2010215074A - Vehicular speaker device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reproduce clear undertone by enhancing acoustic presence and sound image localization. <P>SOLUTION: A speaker box 5 and a woofer 6 are provided in a front of the internal space 4 between the operation panel 2 of the center console 1 and a shift lever 3. A speaker grille 7 and a duct opening 8 are provided on the side wall of the center console 1. A dead space as a simple space can be used as an installation space for the speaker box 5 by installing the speaker box in an empty dead space between an operation mechanism to be operated by the operation panel 2 and a shift mechanism to be operated by the shift lever 11 so that the undertone is reproduced at the legs of occupants in a driver's seat or a front passenger seat. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle speaker device that can emphasize bass.

  FIG. 5 shows a vehicle acoustic system disclosed in Patent Document 1. In FIG. 5, a center console 34 is disposed between a front driver's seat 32 and a passenger seat 33 in the passenger car 31. The center console 34 is provided with an acoustic device 35 that generates sound. The driver side door 36, the passenger side door 37, and the rear shelf board 38 of the passenger car 31 are individually provided with speakers 39 that reproduce and emit sound signals supplied from the sound device 35. However, in order to properly reproduce the sound of the woofer, the thickness of the driver side door 36 and the passenger side door 37 is insufficient, and there is a disadvantage that the low sound cannot be emphasized.

JP 2001-270391 A

  The problem to be solved by the invention is that the reproduction of bass is not satisfactory.

  The vehicle speaker device according to the present invention forms a housing necessary for the woofer using the hollow space inside the center console of the vehicle, and reproduces bass from the feet of the driver seat or the front passenger seat in the front seat. It is a thing.

  The vehicle speaker device according to the present invention forms a casing necessary for the woofer using the space of the center console, and the bass is reproduced from the feet of the driver's seat or the front passenger seat. A sense of presence and sound image localization with an appropriate volume can be obtained even at a seat.

FIG. 3 is a perspective view showing a center console of the first embodiment. FIG. 3 is a side view showing the center console of the first embodiment. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. 2B-B line sectional view. The plane schematic diagram of the conventional acoustic system for vehicles.

“Embodiment 1”
With reference to FIG. 1, the structure of the vehicle speaker device according to the first embodiment will be described. In FIG. 1, the vehicle speaker device is provided with a speaker box 5 and a woofer 6 in the front part of the internal space 4 between the operation panel 2 and the shift lever 3 of the center console 1. A speaker grille 7 and a duct opening 8 are provided, and bass sounds are reproduced at the feet of the driver seat or the passenger seat at the front seat.

  As the operation panel 2, the mode which operates an air conditioner or an audio device was illustrated. The center console 1 is also provided with an accessory case 9, a side lever 10, and a console box 11.

  The woofer 6 is installed inside the speaker box 5, and the speaker box 5 is connected to the duct opening 8 to constitute a bass reflex type (bass reflex). The bass reflex type is a method of amplifying the low frequency range of the sound generated from the woofer 6 by Helmholtz resonance, and is also called a phase inversion type.

  The bass reflex type is less affected by the back pressure of the speaker box 5 than the sealed type, and is characterized by being stretched and stretched. Rather, the features are more pronounced with backloaded horn type or flat baffles. Therefore, the bass reflex type is said to have a greater influence of back pressure than the back load horn type or the flat baffle.

  In addition, the bass reflex type reproduces bass more efficiently than the sealed type, while the sound pressure output lower than the Helmholtz resonance frequency attenuates abruptly, so there is a limit to the bass reproduction band. On the other hand, the bass reflex type reproduces bass to a lower band than the back load horn type.

  As a modified example of the bass reflex type, there is a dumped bass reflex type. This is the one in which Helmholtz resonance is damped (dumped) to reduce the Q value, and the characteristics are intermediate between the sealed type and the bass reflex type. As a form of the woofer 6, there are a sealed type that seals the sound generated from the rear of the diaphragm unit, and a bass reflex type that amplifies the low frequency range of the sound generated from the rear of the diaphragm unit by Helmholtz resonance. In any case, do not touch the sound played from the front.

  In addition, there is a double bass reflex type, which is a double bass reflex type, and since Helmholtz resonance is doubled, bass is efficiently reproduced to a lower band.

  The surroundings of the speaker box 5 in the internal space of the center console 1 will be described with reference to FIG. In the internal space of the center console 1, a speaker box 5, an operation mechanism 13 that is moved by the operation panel 2, and a shift mechanism 14 that is moved by the shift lever 11 are disposed. Since the speaker box 5 is installed in a dead space where nothing is arranged between the operation mechanism 13 and the shift mechanism 14, the dead space that has been just a space until then is used as an installation space for the speaker box 5. it can.

  The internal structure of the speaker box 5 will be described with reference to FIG. A woofer hole 16 is provided in the side wall of the speaker box 5 on the speaker grille 7 side. Then, the large-diameter flange portion 17 of the speaker cone of the woofer 6 is fitted into the woofer hole 16 and attached, and the vibration unit 18 of the woofer 6 is disposed inside the speaker box 5.

  In a gap 19 between the speaker box 5 and the side wall of the center console 1, a vibration isolating material 20 that absorbs vibration or suppresses vibration is installed. The vibration isolator 20 is annular so as to surround the speaker grille 7 and the caliber flange portion 17 without interfering with the speaker grille 7 and the caliber flange portion 17, and the side wall of the speaker box 5 on the speaker grille 7 side. The speaker box 5 is supported in a suspended state in the center console 1 so as to be in contact with the side wall of the center console 1 and away from the center console 1 and the vehicle body structure 21 on which the center console 1 is installed. Therefore, the sound generated from the woofer 6 is released from the speaker grill 7 to the feet of the occupant without escaping to the entire gap 19. The vehicle body component 21 is a member such as a vehicle body floor or a carpet laid on the vehicle body floor.

  A harness 23 that connects the woofer 6 and an audio device (not shown) passes through a harness grommet 24 attached to the bottom wall of the speaker box 5 and is wired inside and outside the speaker box 5. Inside the speaker box 5, a partition wall 25 that partitions the internal space of the speaker box 5 into a driver seat side and a passenger seat side is provided. The partition wall 25 contains a vibration isolating material 26 that absorbs vibration or suppresses vibration.

  The internal structure around the duct opening 8 will be described with reference to FIG. The duct opening 8 is surrounded by a console side duct 27 extending from the side wall of the center console 1 to the speaker box 5 side. The console side duct 27 is formed in an upward direction with an upward slope as it goes from the side wall of the center console 1 toward the speaker box 5, so that dust does not easily enter the speaker box 5 from the duct opening 8. The console side duct 27 is inserted into a box side duct 29 surrounding a through hole 28 formed in the side wall of the speaker box 5.

  Hereinafter, although not shown, a sealed type other than the bass reflex type and the ASW type will be described. First, the sealed type has no holes in the speaker box except for the sound coming out from the woofer to the outside of the speaker box, and the sound coming out from the woofer to the rear side is attenuated inside the speaker box. It is a format that is not used as a sound that goes out of the room.

  Therefore, in the sealed type, when sound is reproduced by the vibration unit of the woofer, the woofer emits sound waves of opposite phases at the same frequency on the front side and the rear side. Therefore, the front and back sound waves interfere with each other and cancel each other. This effect is particularly remarkable in a sound wave having a low frequency, that is, a bass. High-frequency sound waves have strong directivity, and sound waves emitted to the front and rear surfaces go straight forward and backward, and do not interfere with each other. However, low-frequency sound waves have low directivity and are opposite to the direction of travel. Easily diffract and interfere. For this reason, it is difficult to reproduce a decent sound simply by making the diaphragm unit alone, and some kind of contrivance is required.

  The sealed type is particularly simple, and is simply a diaphragm unit attached to a box without an outlet. As a result, the sound wave emitted from behind the diaphragm unit is sealed in the box. Also, the air inside the box acts as a spring, and has the effect of enhancing the low frequency of the diaphragm unit.

  Next, the ASW type is a system in which the bass sound emitted from the rear side of the diaphragm unit is enhanced by a bass reflex type, and the sound emitted from the front side of the diaphragm unit is sealed in a sealed type (may be reversed). Or it is a system which reinforces with a bass-reflex type on both the front and rear sides. In this case, if the tuning frequency is made the same, the phases of the reproduced sound on the front and rear surfaces are opposite to each other and cancel each other. Therefore, it is necessary to shift the tuning frequency by one octave or more. Since the direct sound from the diaphragm unit does not reach the ear, the middle / high sound is not reproduced, and the woofer 6 reproduces only the low sound. That is, the ASW type is used for the subwoofer 6.

  1 is a center console, 2 is an operation panel, 3 is a shift lever, 4 is an internal space, 5 is a speaker box, 6 is a woofer, 7 is a speaker grille, 8 is a duct opening, 9 is a small case, 10 is a side lever, 11 Is a console box, 13 is an operation mechanism, 14 is a shift mechanism, 15 is a missing number, 16 is a hole for a woofer, 17 is a flange on the large diameter side, 18 is a vibration unit, 19 is a gap, 20 is a vibration isolator, and 21 is a vehicle body. Structure, 22 is a missing number, 23 is a harness, 24 is a harness grommet, 25 is a partition wall, 26 is a vibration isolator, 27 is a console side duct, 28 is a through hole, 29 is a box side duct, 30 is a missing number, 31 is a passenger car , 32 is a driver seat, 33 is a passenger seat, 34 is a center console, 35 is an audio device, 36 is a driver seat side door, 37 is a passenger seat side door, and 38 is a rear shelf board. 39 speakers.

Claims (6)

  A vehicle speaker device, wherein a woofer is provided at a front portion of an inner space of the center console, and a speaker grill for outputting sound from the woofer to the outside of the center console is provided on a side wall of the center console.   2. The vehicle speaker device according to claim 1, wherein the woofer is configured in a bass reflex shape provided in a speaker box.   2. The vehicle speaker device according to claim 1, wherein the speaker box is attached to the center console with a vibration isolating material so that the speaker box is suspended in the interior space of the center console.   2. The vehicle speaker device according to claim 1, wherein the woofer is provided separately for the driver seat side and the passenger seat side.   5. The vehicle speaker device according to claim 4, wherein the speaker box is partitioned by a partition wall between a driver seat side and a passenger seat side.   6. The vehicle speaker device according to claim 5, wherein a vibration isolating material is placed inside the partition wall.

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