JPH07225588A - On-vehicle speaker system - Google Patents

Abstract

PURPOSE:To secure front localization in a cabin by giving directivity to the opening parts of a grill. CONSTITUTION:The on-vehicle speaker system has a full-range speaker 14A fitted to a front door and a full-range speaker 14A fitted to a rear door. Grills 26 fitted to the front surfaces of those speakers 14 have opening parts 30 consisting of long holes 28. Each speaker 14 is so arranged that the long axes L3 of the long holes 28 of the grill are directed to the ears 22 of a listener corresponding to each door.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an in-vehicle speaker system, and more particularly, to an in-vehicle device which comprises a plurality of speakers respectively mounted on the side surfaces of doors and rear seats to secure the front localization thereof. Speaker system for a vehicle.

[0002]

2. Description of the Related Art Generally, a speaker has a grill having an opening formed in front of its diaphragm. Since the grill is intended to protect the diaphragm of the speaker exclusively, conventionally, only the opening of the grill has been considered so as to ensure an opening ratio that allows sound to be propagated. Therefore, the conventional grill has been formed of a punching metal having an opening formed in a circular round hole or a wire mesh having a predetermined strength.

[0003]

However, when the openings of the grill are simply round holes as in the prior art or when the grill is formed by a wire mesh, the sound propagated through these openings is At a position away from the speaker axis, there is no directivity characteristic in the specific direction, and the sound pressure level is diffused in the circumferential direction of the speaker axis at substantially the same level.

On the other hand, in the vehicle speaker system 10,
For example, as shown in FIG. 1, in a four-door type vehicle 12, there is a vehicle in which full-range speakers 14A and 14B are mounted on each door 16 of a front door 16A and a rear door 16B.

In such a vehicle-mounted speaker system 10, as in the prior art, the directivity characteristic with respect to a specific direction is not exhibited at a position distant from the speaker axis, and substantially the same sound pressure is exerted in the circumferential direction of the speaker axis. If a grill that diffuses sound at a level is attached to the speakers and these speakers are used in combination, for a listener sitting in the front seat 20A, the sound propagated from the full-range speaker 14A mounted on the front door 16A and the rear door are installed. 16B
The sound propagated from the full-range speaker 14B mounted on the vehicle reaches the ears almost in the same way, and the sound image is localized at the ears, thus ensuring the front localization, which is ideal for playing music in the automobile. There are drawbacks that cannot be achieved.

This is because the sound propagated from the opening formed by the circular round hole has a directional characteristic mainly in the speaker axial direction having the highest aperture ratio, but the speaker is placed on the side surface of the door or the rear seat. When the speaker is installed, its speaker axis is usually directed toward the feet or the waist, not the listener's ear, so that the speaker mounted on the side of the door or rear seat corresponding to the listener's ear (i.e., , A speaker mounted on the front door for a listener in the front seat, and a speaker mounted on the side of the rear door or the rear seat for a listener in the rear seat) cannot be dominant. As a result, especially for a listener in the front seat, the sound from the speaker mounted on the rear door or the like, which is arranged behind the ear of the listener and diffuses the sound in the circumferential direction, is similar to the ear. Due to the fact that the will to reach. Therefore, if the sound propagated from the speaker is directed to the ear of the corresponding listener, the sound from the speaker becomes dominant and the front localization can be secured.

Therefore, in the in-vehicle speaker system, therefore, the speaker and the grill corresponding to the listener's ear are angled so that the speaker axis is directed to the corresponding listener's ear, and side surfaces of the door and the rear seat. When attached to
Since the grill protrudes from the door and the like, it is necessary to secure an extra space, which causes a problem in securing the vehicle compartment space such as opening and closing the door and obstructing boarding. Further, there is provided a technique for giving a directional characteristic to the grill by inclining the ribs of the grill and extending a slit formed between the ribs so as to incline with respect to the speaker axis. (See Japanese Utility Model Laid-Open No. 4-48797). However, in this conventional technique, directional characteristics cannot be provided unless the depth of the slit in the speaker axis direction is increased due to sound diffraction. On the other hand, when the depth is increased, a resonance phenomenon due to the slit occurs, which has a drawback that sound quality is adversely affected.

In order to solve the above problems, an object of the present invention is to improve the directional characteristics of the speaker with respect to the listener's ears without requiring an extra space, and to output the sound from the speaker corresponding to the listener's ears. It is an object of the present invention to provide a vehicle-mounted speaker system that can secure the front localization and improve the sound quality by controlling the above.

[0009]

As a means for solving the above-mentioned problems, the present invention provides a vehicle-mounted speaker system having a plurality of speakers mounted on each door of a vehicle. The speaker grill has an opening formed of a long hole, and the speaker is arranged such that the direction of the long axis of the long hole of the grill is directed to the listener's ear corresponding to each door. The present invention provides a vehicle-mounted speaker system. Specifically, for example, when the speaker is mounted on a four-door vehicle, the speaker is attached to each of the four doors.

As another means for solving the above-mentioned problems, the present invention provides a vehicle-mounted speaker system having a plurality of speakers mounted on the side surfaces of each door and rear seat of a vehicle. The speaker grill attached to the side of the seat has an opening consisting of a long hole,
This speaker provides an in-vehicle speaker system characterized in that the long axis of the long hole of the grill is arranged so as to be directed to the listener's ear corresponding to each door or rear seat. is there. Specifically, for example, when the speaker is mounted on a two-door vehicle, the speakers are attached to the two doors of the two-door vehicle and the side surfaces of the rear seat, and when mounted on the three-door vehicle, The speakers are mounted on the front two doors of a three-door vehicle and on the sides of the rear seats.

Furthermore, the present invention provides the vehicle-mounted speaker system according to any one of the above, wherein a long hole H _i arbitrarily selected from a plurality of long holes and a long axis direction of the long hole H _i. long hole H _k thickness of the wall of the grill, adjacent the long holes H _i, the long holes H _i in the transverse direction of the long holes H _i between the long hole H _j and an adjacent elongated hole H _i in The present invention provides a vehicle-mounted speaker system characterized in that it is formed to be thinner than the wall thickness of the grille between.

[0012]

As described above, in the in-vehicle speaker system in which the speaker is also arranged behind the ear of the listening vehicle, the opening of the grill of the speaker is made a long hole, and the direction of the long axis of the long hole of each speaker is set. However, when a plurality of speakers are combined by arranging so as to point to the corresponding listener's ears on each door or rear seat at each mounting position, the opening ratio of the grille opening to each listener's ear is increased. In order to improve the sound quality, the sound propagated through the opening exhibits directional characteristics in the direction of each listener's ear existing in the direction of the long axis of the long hole, and at the same time, the listener (especially, the listener in the front seat). ) The sound from the speaker located behind the ears also shows directional characteristics in the direction of the listener (that is, the listener in the rear seat) corresponding to the speaker, and the influence on the ears of the listener in front is reduced. ,each The sound is dominant from the corresponding speaker for Tosha, it is possible to secure the front localization.

In particular, as described above, in these in-vehicle speaker systems, the wall thickness of the grill between the adjacent long holes in the longitudinal direction of the long axis of the long hole is set in the lateral direction of the long axis of the long hole. If the thickness of the wall of the grill between the adjacent slots is thinner than the wall thickness of the grill, the sound escapes in the long axis direction of the slots, and the listener present on the side wall of the door or the rear seat in the long axis direction of the slots. The directional characteristics with respect to the ear of the player can be further improved, and forward localization can be ensured more reliably. This is because the thinner the wall of the grill is, the less the interference between the sound directly transmitted to the listener through the opening and the sound reflected on the wall of the opening of the slot is reduced. This is because the direction of the listener's ear is thinned in the wall of the grill between the adjacent long holes in the longitudinal direction of the long axis of the long hole, that is, in the speaker such as a door, and thus the aperture ratio in this direction is improved.

Further, in this way, the shape of the opening of the grill,
If the front localization is ensured by the arrangement or the like, the sound quality can be improved without requiring an extra space.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described in detail. FIG. 1 and FIG. 2 show an interior of a vehicle 12 equipped with an in-vehicle speaker system 10 of the present invention. In the embodiment shown in FIG. 2, the vehicle 12 is a four-door vehicle,
The in-vehicle speaker system 10 has a plurality of speakers 14 attached to each door 16.

More specifically, the in-vehicle speaker system 10 includes a full-range speaker 14A attached to a front door 16A, as shown in FIGS.
And a full-range speaker 14B attached to the rear door 16B. Note that in FIG. 1 and FIG. 2, reference numeral 14C indicates a tweeter attached to the back side of the door mirror 18.

As shown in FIG. 3, the grills 26 of the plurality of loudspeakers 14 attached to these doors 16 have an opening 30 formed of an elongated hole 28.

The grill 26 is attached to the front surface of the speaker 14 so as to protect a diaphragm (not shown) that constitutes the speaker 14. Also, this grill 26 is ABS
The long hole 2 is made of a resin such as a resin or a material such as a metal.
The opening 30 made of 8 is formed at the time of molding these resins or by punching a metal.

When the opening 30 is formed from the long hole 28 in this manner, sound is easily diffused in the direction of the long axis L ₃ (see FIG. 3) of the long hole 28. This is because the aperture ratio in the direction of the major axis L ₃ (see FIG. 3) of the elongated hole 28 is improved as compared with the case where the shape of the opening 30 is simply a round hole as in the prior art.

The opening 30 composed of the slot 28 is shown in FIG.
As shown in FIG. 3, the grill 26 is formed by being partitioned by the wall 27 of the grill 26 that is continuous in the vertical and horizontal directions. Further, as shown in FIG. 3, the opening 30 composed of a plurality of elongated holes 28 which are divided in this way and are arranged vertically and horizontally on the grill 26 has a long axis L ₃ of the elongated holes 28 (see FIG. 3). Are aligned so that they are all parallel. Thus, by forming so that the long axis L ₃ of the long hole 28 (see FIG. 3) is directed in the same direction, the diffusion of the long axis L ₃ (see FIG. 3) the sound with respect to the direction of the long holes 28 described above Can be adjusted to point in a particular direction.

As shown in FIG. 4, the speaker 14 attached to the door 16 shown in FIGS. 1 and 2, that is, the above-described full-range speakers 14A and 14B, has the grill 26 as shown in FIG.
The long axis L ₃ of the slot 28 (see FIG. 3) is arranged so as to point to the listener's ear 22 corresponding to each door 16 (see arrow A in FIG. 1). It should be noted that the listeners corresponding to the respective doors 16 are the listeners sitting on the front seat 20A shown in FIG. 1 in the case of the full-range speaker 14A attached to the front door 16A, and the full-range speakers attached to the rear door 16B. The speaker 14B refers to a listener seated on the rear seat 20B shown in FIGS. 1 and 2.

More specifically, as shown in FIG. 4, the speaker 14 has the long axis L ₃ of the long hole 28 of the grill 26.
(See FIG. 3 and FIG. 4)
₁ (see FIG. 4) and the listener's ears 2 corresponding to each door 16
A surface P formed by connecting with the axis line L _{2 of 2} (see FIG. 4)
(See FIG. 4). That is, the long axis L ₃ of the long hole 28 described above (see FIGS. 3 and 4).
The sound diffusion direction with respect to the direction is set so as to be directed to the direction of the listener's ear 22 corresponding to each door 16.

Therefore, the sound propagated through the opening 30 of the slot 28 has a directional characteristic in the direction of the ear 22 of the listener sitting on the front seat 20A in the full-range speaker 14A attached to the front door 16A. Will be shown. Further, the sound from the full-range speaker 14B attached to the rear door 16B has a directional characteristic in the direction of the ear 22 of the listener sitting on the rear seat 20B. This means that at the same time, the ears 2 of the listener sitting in the front seat 20
2 means that the sound propagated from the full-range speaker 16B attached to the rear door 16B located behind 2 to the ear 22 of the listener in the front seat 20A is reduced.

Therefore, when these speakers 14 are combined, the sound from the corresponding speaker becomes dominant for each listener, and front localization can be secured.
In particular, since the grill 26 itself has a directional characteristic due to the shape and arrangement of the opening 30 of the grill 26, it is not necessary to direct the speaker axis L ₁ (see FIG. 4) to the ear 22 of the listener, which is unnecessary. It is preferable because front localization can be secured without requiring a speaker mounting space.

This is because the listener's ear 22 is the speaker axis L.
₁ (See FIG. 4) Grill 2 of the listener's ear 22 that is not present above
6 has a small inclination angle θ (see FIG. 4 (A)), the opening 30 is the long hole 28, and the long axis L ₃ of the long hole 28 (see FIGS. 3 and 4) is particularly large. This is because, as shown in (B), the direction of the listener's ear 22 is directed, so that the aperture ratio of the opening 30 with respect to the listener's ear 22 is improved, so that directional characteristics can be provided. . This can be understood from the fact that the elongated hole 28 according to the present invention has a larger visible area when the elongated hole 28 and a conventional simple hole are viewed from diagonally above at the same angle.

When the arrangement state of the speaker 14 is specified more specifically, as shown in FIG.
When A is attached to the door 16 so as to be located at the listener's feet, the grill 2 is attached as shown in FIG.
6 has a long axis L ₃ (see FIGS. 3 and 4) inclining with respect to the floor 24 of the passenger compartment, for example, the long axis L ₃ (see FIGS. 3 and 4). The full-range loudspeaker 14A is arranged so that the reference angle) is inclined at about 40 ° with respect to the floor 24 of the passenger compartment. This is the speaker axis L ₁
(See FIG. 4) and the axis L ₂ of the listener's ear 22 (see FIG. 4)
The inclination angle θ ₁ (see FIG. 4B) of the plane P (see FIG. 4) formed by connecting and with the floor 24 of the vehicle interior is usually about 40 °.

Therefore, the long axis L ₃ of the long hole 28 (see FIG. 4B)
By adjusting the inclination angle of the passenger compartment with respect to the floor 24 in this way, the major axis L ₃ of the slot 28 (see FIGS. 3 and 4) can be substantially directed to the ear 22 of the listener. It is possible to increase the aperture ratio of the opening 30 with respect to the listener's ear 22 to give directional characteristics and secure front localization. However, the long axis L ₃ of the long hole 28 (see FIG. 4 (B))
The inclination angle of the passenger compartment with respect to the floor 24 is
The full-range speaker 14 is not limited to 0 °.
It can be dealt with by appropriately adjusting according to the mounting position of A.

Next, another embodiment of the present invention will be described with reference to FIG. 5. In this embodiment, a plurality of doors 16 and a plurality of side walls (inner wall inner surface) 32 of the rear seat 20B of the vehicle are mounted. In the in-vehicle speaker system 10 having the speaker 14, the grill 26 having the opening 30 made of the elongated hole 28 is used.

More specifically, as shown in FIG. 5, the plurality of speakers 14 are two doors 16A of a two-door car.
It is attached to the side surface 32 of the rear seat 20B, or to the side surfaces 32 of the two front doors 16A and the rear seat 20B of a three-door vehicle such as a hatchback vehicle. Ie 2
In the case of a door vehicle or a three-door vehicle, unlike the above-described four-door vehicle, there are only two doors 16 for the passenger to move up and down to the vehicle 12, and the speaker 14 is attached to the rear door of the four-door vehicle. The part corresponding to 16B is the rear seat 2
0B side surface 32, and the embodiment shown in FIG. 5 shows that the vehicle-mounted speaker system 10 of the present invention can be applied to such a case.

In this embodiment, as shown in FIG. 4, a plurality of speakers 14 have a long hole 28 of a grill 26 whose long axis L ₃ (see FIG. 3) corresponds to each door 16 or rear seat 20B. Are arranged so as to be directed to the ears 22 of each. In this embodiment, the listener corresponding to each door 16 is a listener seated on the front seat 20A, and the listener corresponding to the rear seat 20B is a listener seated on the rear seat 20. .

As a result, even in the case of a two-door vehicle or a three-door vehicle, similar to the above-described embodiment shown in FIGS. 1 and 2,
It is possible to secure forward localization. The method of directing the long axis L ₃ (see FIGS. 3 and 4) of the elongated hole 28 to the listener's ear 22 is the same as that in the embodiment shown in FIGS. 1 and 2 (see FIG. 4).

As can be seen from the above, the in-vehicle speaker system 10 of the present invention can be used to secure the front localization when the speaker 14 is also arranged behind the listener's ear 22. it can. Therefore, the embodiments shown in FIGS. 1 to 5 show examples of the in-vehicle speaker system 10 of the present invention, respectively, and the present invention needs to secure the front localization regardless of the type of the vehicle 12 to be mounted. If so, the present invention is not limited to the above-described four-door vehicle shown in FIGS. 1 and 2 or the two-door vehicle and three-door vehicle shown in FIG. 5, but can be applied to other types of vehicles 12.

If there is a speaker 14 behind the listener's ear 22 and it is necessary to secure front localization, the number of speakers 14 and the speaker 14 such as tweeter, full range, woofer, etc. The type and the place of the component to be attached are not particularly limited, and other configurations different from the embodiments shown in FIGS. 1 to 5 may be used.

For example, as shown in FIG. 6, the door 1 is placed so that the full-range speaker 14A is located near the listener's waist.
6 or the side surface 22 of the rear seat 20B. In such a case also, as the major axis L ₃ full-range speakers 14A and the long hole 28 (see FIG. 3), 4 in the case of a door vehicles directing the ears of a listener corresponding to each door 16,
In the case of a two-door vehicle or a three-door vehicle, the listener's ear 22 corresponding to the side surface 32 of the door 16 or the rear seat 20B.
It is possible to secure the frontal localization by arranging so as to point.

More specifically, as shown in FIG. 7, in this full-range speaker 14A, the long axis L ₃ (see FIGS. 3 and 7) of the long hole 28 of the grill 26 with respect to the floor 24 of the passenger compartment. And place them vertically. This is the inclination angle θ _{1 of the} plane P (see FIG. 7) formed by connecting the speaker axis L ₁ (see FIG. 7) and the axis of the listener's ear 22 (see FIG. 7) with respect to the floor 24 of the passenger compartment. (See FIG. 7), but is usually about 90 °. Therefore, by adjusting the inclination angle of the long axis L ₃ of the long hole 28 (see FIG. 7) with respect to the floor 24 of the vehicle compartment in this way, the long axis L of the long hole 28 can be adjusted.
₃ (see FIG. 3 and FIG. 7) can be almost directed to the listener's ear 22, and by combining a plurality of speakers 14 arranged in this way, it is possible to secure forward localization.

Furthermore, the in-vehicle speaker system 1 of the present invention.
0, the wall thickness between the long holes 28 is appropriately set so that the strength of the grill 26 is maintained and the long holes 2
It is possible to further improve the directional characteristics of the No. 8 in the direction of the major axis L ₃ (see FIG. 3). That is, the speaker 14 attached to each door 16 or the side surface 32 of the rear seat 20B.
By improving the directional characteristics of each speaker 14 with respect to the corresponding listener's ear 22, the front localization can be more reliably ensured.

That is, regarding the grill 26 shown in FIG.
As shown in FIG. 8 which is a sectional view taken along the line AA and FIG. 9 which is a sectional view taken along the line BB, a long hole H _i arbitrarily selected from the plurality of long holes 28 and the long hole H _i. The wall thickness t ₁ (see FIG. 8) of the wall 27 of the grill 26 between the long hole H _i and the adjacent long hole H _j in the longitudinal direction of the long axis L ₃ (see FIG. 3) of
And long holes H _i, the long holes H _i of the long axis L ₃ and the adjacent long hole H _i in the transverse direction of the (see FIG. 3) long holes H _k thickness of the wall 27 of the grille 26 between t ₂ (See FIGS. 8 and 9) It can be formed thinner.

Therefore, for example, the long hole 28A shown in FIG.
And the wall thickness t ₁ of the wall 27A of the grill 26 between the elongated hole 28A and the elongated hole 28B adjacent in the longitudinal direction (see FIG. 8).
8 and 9 show the slot 27A and the wall thickness t ₂ (see FIGS. 8 and 9) of the wall 27B of the grill 26 of the slot 28C adjacent to the slot 28B in the transverse direction, rather than the wall thickness t ₂ thereof. like,
It is thinly formed. This also applies to all the other elongated holes 28, as can be seen from FIGS. 8 and 9. Therefore, when viewed from the entire grill 26, all the long holes 2 adjacent to the long axis of the long hole 28 in the longitudinal direction of the long axis L ₃ (see FIG. 3).
The wall 27A of the grill 26 between 8 is thin, and as described above, the wall 27A of the grill 26 existing across the direction in which the sound transmitted through the opening 30 is directed, that is, the major axis L _{3 of the} slot 28 (see FIG. 1). Is thinly formed. The mechanical strength of the grill 26 is maintained by the wall 27B having a wall thickness t ₂ (see FIGS. 8 and 9).

As a result, the sound escape in the direction of the long axis L ₃ (see FIG. 3) of the long hole 28 is improved, and the speaker 14 mounted on the side surface 32 of the door 16 or the rear seat 20B.
In the above, it is possible to further improve the directional characteristics of the long hole 28 in the direction of the long axis L ₃ toward the ear 22 of the listener, and surely secure the front localization. This is the wall 27 of the grill 26
The thinner the wall thickness, the smaller the area of the wall 27, that is, the reflection area. Therefore, the sound transmitted directly to the listener through the opening 30 interferes with the sound reflected on the wall 27 surface of the opening 30 of the slot 28. Is reduced, the long axis direction L of the long hole 28 is reduced.
_This is because the aperture ratio of the opening 30 with respect to the listener's ear 22 existing in ₃ (see FIG. 3) is improved. When setting the wall thickness of the wall 27 of the grill 26 in this way, the grill 2
Since the shape of 6 is complicated, it is preferable to form a thermoplastic resin such as an ABS resin by hot-melting and then cooling, which facilitates production.

In the above-described embodiment, the opening 30 is formed by the long holes 28 which are vertically and horizontally divided on the plane of the grill 26. However, as shown in FIG.
_It may be formed from the long holes 28 formed continuously without being divided in the ₃ (see FIG. 11) direction. When the long hole 28 has such a shape, the aperture ratio of the opening 30 with respect to the ear 22 of the listener can be further improved. However, in this case, it is preferable to give sufficient consideration so as not to reduce the strength of the grill 26.

[0041]

As described above, according to the present invention, in the in-vehicle speaker system in which the speaker is arranged behind the listener's ear as well, the opening of the grill of the speaker is a long hole, and each speaker is The direction of the long axis of the long hole is arranged so that the listener's ears corresponding to the doors or the rear seats at the respective mounting positions are directed, and a plurality of speakers are combined, so that The opening ratio of the grill opening to the ears is improved so that the sound propagated through the opening becomes directional in the direction of each listener's ear existing in the long axis direction of the slot, and at the same time, the listener ( In particular, the sound from the speaker located behind the ear of the front seat listener) also corresponds to the speaker (that is, the back seat listener).
Since the directional characteristics are shown in the direction of, and the influence on the ears of the listener in front is reduced, the sound from the corresponding speaker becomes dominant for each listener, and it is possible to secure the front localization. is there.

Further, according to the present invention, as described above, in these vehicle-mounted speaker systems, the wall thickness of the grill between the long holes adjacent to each other in the longitudinal direction of the long axis of the long holes is made equal to that of the long holes. Since the thickness of the wall of the grill between the adjacent long holes in the lateral direction of the long axis is thin, the sound transmitted directly to the listener through the opening and the opening of the long hole in the long axis direction of the long hole. The interference with the sound reflected on the wall surface of the seat is reduced, the sound escapes in the long axis direction of the long hole, and the listener's ear existing in the long axis direction of the long hole in the speaker on the side of the door or the rear seat. Since the directional characteristic with respect to can be further improved, there is a practical advantage that the forward localization can be more surely secured. The mechanical strength can be maintained by the other wall thickness of the grill.

In particular, the shape of the opening of the grill,
Since the front localization is ensured by the arrangement and the like, there is a practical advantage that the sound quality can be improved without requiring an extra space.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a vehicle interior of a vehicle equipped with a vehicle-mounted speaker system of the present invention.

FIG. 2 is a schematic plan view of the interior of a vehicle equipped with the vehicle-mounted speaker system of the present invention shown in FIG.

FIG. 3 is a plan view of a grill used in the present invention.

FIG. 4 is a diagram showing a mounting state of a grill when a speaker used in the present invention is mounted on a side surface of a door or a rear seat so as to be located near a foot of a listener.

FIG. 5 is a diagram showing a vehicle equipped with a speaker system of the present invention;
It is a schematic perspective view of the vehicle interior of a door or a three-door vehicle.

FIG. 6 is a schematic perspective view of the interior of a vehicle equipped with a vehicle-mounted speaker system in which a speaker used in the present invention is attached near the waist of a listener.

FIG. 7 is a diagram showing a mounting state of a grill when a speaker used in the present invention is mounted on a side surface of a door or a rear seat so as to be located near a waist of a listener.

8 is a cross-sectional view taken along line AA of the grill shown in FIG.

9 is a cross-sectional view of the grill shown in FIG. 3 taken along the line BB.

FIG. 10 is a plan view of a grill used in another embodiment of the present invention.

[Explanation of symbols]

10 vehicle-mounted speaker system 12 vehicle 14 speaker 14A full-range speaker 14B full-range speaker 14C tweeter 16 door 16A front door 16B rear door 18 door mirror 20 seat 20A front seat 20B rear seat 22 listener's ear 24 vehicle compartment floor 26 grill 27 grill Wall 28 Slot 30 Opening 32 Side of rear seat L ₁ Speaker axis L ₂ Listener's ear axis L ₃ Slot's long axis P Surface formed by connecting speaker axis and listener's ear axis

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical indication location H04R 5/02 F (72) Inventor Minoru Kobayashi 1 Toyota-cho, Toyota-shi, Aichi Toyota Motor Co., Ltd. ( 72) Inventor Yoshiaki Kato 1 Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Corporation (72) Inventor Goro Takahashi, 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation

Claims (6)

[Claims] 1. A vehicle-mounted speaker system having a plurality of speakers attached to each door of a vehicle, wherein a grill of the speaker attached to each door has an opening formed of an elongated hole, and the speaker is An in-vehicle speaker system, characterized in that the long axis of the long hole of the grill is arranged so as to be directed to a listener's ear corresponding to each door. 2. The in-vehicle speaker system according to claim 1, wherein the plurality of speakers are attached to four doors of a four-door vehicle, respectively. 3. A vehicle-mounted speaker system having a plurality of speakers mounted on the side surfaces of each door and a rear seat of a vehicle, wherein grills of the speakers mounted on the side surfaces of each door and the rear seat are formed from long holes. The speaker is arranged so that the direction of the long axis of the long hole of the grill is directed to the listener's ear corresponding to each of the doors or the rear seats. In-vehicle speaker system. 4. The in-vehicle speaker system according to claim 3, wherein the plurality of speakers are attached to two doors of a two-door vehicle and side surfaces of a rear seat. . 5. The in-vehicle speaker system according to claim 3, wherein the plurality of speakers are two in front of a three-door vehicle.
An in-vehicle speaker system, characterized in that the speaker system is mounted on the side surfaces of two doors and a rear seat. 6. The in-vehicle speaker system according to claim 1, wherein an elongated hole H _i arbitrarily selected from the plurality of elongated holes and the elongated hole H _i . The wall thickness of the grill between the long hole H _i and the adjacent long hole H _j in the long axis direction is the long hole H _i and the long hole H _{i in} the lateral direction of the long hole H _i . vehicle-mounted speaker system characterized in that it is thinner than the thickness of the wall of the grill between the adjacent long hole H _k.