JP2003348678A - Structure of speaker box for vehicle door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a speaker box for a vehicle door with a simple configuration and ease of assembling and provided with a speaker box space by preventing production of chattering noise so as to obtain an excellent acoustic characteristic. <P>SOLUTION: A hatch-back door 10 has an enclosed speaker box space formed by a speaker 1, an inner panel 10a, an outer panel 10b, and an adhesive 5 and a wall member at a rear part of the speaker 1. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker box structure provided on the back side of a speaker attached to a vehicle door.

[0002]

2. Description of the Related Art Conventionally, an in-vehicle speaker is attached to a vehicle door for a vehicle such as an automobile to allow a driver to listen to music or the like reproduced by radio broadcasting or audio equipment in the vehicle.

A speaker mounted on such a vehicle door is disclosed in Japanese Patent Application Laid-Open No. Hei 10-278689 (published on Oct. 20, 1998), between an outer panel and an inner panel. A speaker structure is disclosed. In this speaker structure, the speaker device is attached to the back door of the vehicle, and a separately created speaker box is provided on the back side of the speaker, so that the sound radiated in the speaker box can be emitted into the vehicle. .

On the other hand, Japanese Unexamined Patent Publication No. 9-37371 (published on Feb. 7, 1997) discloses that a sound wave of a predetermined frequency among sound waves from the back of a speaker body is absorbed,
A speaker device having a hard porous absorbing sound plate that also serves as a waterproof cover is disclosed. According to this speaker device, it is possible to provide a vehicle speaker mounting structure capable of suppressing generation of chattering sound by reducing sound pressure by absorbing sound waves.

Further, Japanese Patent Application Laid-Open No. 6-1184 (published on Jan. 11, 1994) discloses a plurality of speakers attached between an outer plate and an inner plate constituting the outer periphery of a vehicle. A mounting structure for an in-vehicle speaker separated by separating a back cavity space of the speaker is disclosed.
With this mounting structure, the influence of air vibration on the cone vibration of the speakers can be eliminated, and the sound quality reproduced from the speakers can be improved.

[0006]

However, the conventional speaker box structures disclosed in the above publications have the following problems, respectively.

That is, in the speaker structure disclosed in Japanese Patent Application Laid-Open No. 10-278689, the speaker box must be manufactured separately and attached to the door. The door becomes complicated, and the thickness of the door increases to secure a space for inserting the speaker box.

On the other hand, in the speaker device disclosed in Japanese Patent Application Laid-Open No. 9-37371, since the space of the speaker box located on the back side of the speaker body is not closed, the speaker device may be damaged due to intrusion of rainwater or the like. A separate waterproof cover is required to prevent the occurrence.

Further, the mounting structure of a vehicle-mounted speaker disclosed in Japanese Patent Application Laid-Open No. HEI 6-1184 separates the back cavities of a plurality of loudspeakers from each other and changes the volume of the back cavities according to the level of the reproduction frequency. However, since no consideration is given to sealing each of the back cavities, it is difficult to say that good acoustic characteristics, particularly low-pitched sound characteristics, can be obtained.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object a simple structure, easy to assemble, and prevention of chattering noise to obtain good acoustic characteristics. The object of the present invention is to provide a speaker box structure for a vehicle door.

[0011]

SUMMARY OF THE INVENTION The speaker box structure for a vehicle door according to the present invention has the following objects.
In a vehicle door including an inner panel having a speaker attached thereto and an outer panel joined to the inner panel, the inner panel having the speaker attached thereto and the outer panel are connected to each other to form a rear side of the speaker. A closed speaker box space is formed.

According to the above configuration, as compared with a case where the speaker box is formed separately and provided on the back of the speaker, a speaker box structure having a simple configuration, easy to assemble, and excellent in acoustic characteristics is provided. Obtainable.

That is, according to the speaker box structure of the vehicle door of the present invention, when the inner panel provided with the speaker and the outer panel are joined together by using an adhesive or the like or by welding, the inner panel, the outer panel, Speaker,
An enclosed space surrounded by the adhesive is formed. By using this enclosed space as a speaker box, it is not necessary to form the speaker box as a separate body and attach it to the rear part of the speaker. This facilitates assembly of the vehicle door and makes the vehicle door thinner. can do.

Further, since the speaker box obtained by the vehicle door speaker box structure of the present invention is a closed space, the acoustic characteristics, particularly the bass characteristics, can be improved.

Further, it is more preferable that at least one of the inner panel and the outer panel has a speaker box wall for partitioning the speaker box space on a surface of the sealed speaker box space side.

Thus, by providing the speaker box wall, the volume of the speaker box space formed on the back of the speaker can be freely changed. Therefore, the speaker box can be made to have an optimum volume for each speaker that emits sound waves in different frequency ranges,
Good acoustic characteristics can be obtained.

A rib formed in a direction substantially perpendicular to the rear surface of the speaker is provided around at least one of the inner panel and the outer panel around the speaker on the surface of the sealed speaker box space side. More preferably, a member is provided.

Thus, a rib member extending in a direction substantially perpendicular to the rear surface of the speaker, that is, in a direction substantially perpendicular to the direction in which sound waves emitted from the rear surface of the speaker travel, is formed on the surface of the internal panel or the external panel. Therefore, the internal panel or the external panel can be prevented from vibrating under the influence of sound waves. Therefore, since vibrations generated in both panels forming the speaker box are suppressed, generation of noise such as chattering sound can be prevented, and good acoustic characteristics can be obtained.

It is more preferable that the inner panel and the outer panel are connected via the rib member.

Thus, since the rib member is formed up to the surface of the opposing panel, the rigidity of the vehicle door can be increased, and the vibration caused by the sound wave emitted from the speaker can be more effectively suppressed. And excellent acoustic characteristics.

Further, it is more preferable that the rib member and / or the speaker box wall are integrally formed on at least one surface of the inner panel and the outer panel.

This eliminates the need to form the rib member and the speaker box wall into a plate shape and then attach the rib member and the speaker box to the internal panel or the external panel, thereby simplifying the production process of the vehicle door.

Further, it is more preferable that both the inner panel and the outer panel are formed of resin.

[0024] Thereby, it is possible to mold at a lower cost than when using a metal such as iron or aluminum as a raw material, and it is possible to improve the degree of freedom in shape design.

Further, it is more preferable to use a bonding agent for bonding the inner panel and the outer panel.

Thus, the inner panel and the outer panel can be firmly joined together, and the bonding agent absorbs the dimensional error between the molded panels, thereby expanding the allowable range of the molded dimensions of the panels. The yield can be improved.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a speaker box structure of a vehicle door according to the present invention will be described below with reference to FIGS.

The vehicle door having the speaker box structure of the present embodiment is a rear hatchback door 10 that is often used in small private automobiles. The hatchback door 10 includes an inner panel (inner panel) 10a shown in FIG. 2 and an outer panel (outer panel) 10b shown in FIG. 3, and these are joined using a urethane-based adhesive (joining agent). Formed by

By bonding using an adhesive as described above, the inner panel 10a and the outer panel 10b
Can be expanded, and the inner panel 10a and the outer panel 10b can be firmly joined. Further, even if a dimensional error occurs between both molded panels, the dimensional error can be dealt with within a certain range, so that the allowable range of the molded dimensions of both panels can be expanded, and the product yield can be improved.

The inner panel 10a is used on the inner surface of the vehicle body, and is molded from PP (polypropylene) mixed with 30 to 40% of glass fiber as a main raw material so as to have a certain degree of rigidity.

The outer panel 10b has its surface mirror-finished and then painted to form an outer wall of the vehicle body. From the viewpoint of surface characteristics, suitability for painting, collision safety, etc.
Molded using C / ABS (polycarbonate / acrylonitrile butadiene styrene) as a raw material.

As described above, since the inner panel 10a and the outer panel 10b are formed of a thermoplastic resin such as PP or PC / ABS, the weight can be reduced as compared with the case where a metal is used, and the cost can be reduced. The degree of freedom in design can be improved.

The type of resin used to mold the inner panel 10a and the outer panel 10b is not limited to PP or PC / ABS.

As shown in FIG. 4, the inner panel 10a is formed on the surface facing the outer panel, and is formed around the speaker 1 installed toward the interior of the vehicle. Vibration prevention ribs (rib members)
2 and a wall member (speaker box wall) 3.

The vibration preventing rib 2 is a rib-shaped plate having a width of about 1 cm in a direction substantially perpendicular to the back of the speaker 1 and formed radially around the speaker 1. The vibration preventing ribs 2 can prevent the vibration of the inner panel 10a caused by the sound waves output from the speaker 1, and as a result, can suppress the generation of noise such as chattering sound. Further, a rib member 2 'is formed substantially along the opening shape on the back side of the opening for mounting the speaker.
In the case where the speaker box is provided, the rigidity of the speaker box structure is further increased, and vibration can be prevented. Also,
When the ribs 2 for preventing vibration are connected to the rib member 2 'and the side wall of the inner panel 10a, the effect of preventing vibration can be more exerted.

The wall member 3 is formed so as to partition a speaker box space formed between the inner panel 10a and the outer panel 10b. Thus, the volume of the speaker box space can be freely changed according to the level of the frequency range of the sound wave emitted from the speaker 1, and good acoustic characteristics can be obtained.

As shown in FIG. 1, the hatchback door 10 of the present embodiment has a speaker 1, an inner panel 10a, an outer panel 10b, an adhesive 5, and a wall shown in FIG. It has a closed space formed by the member 3.

Thus, a sealed space can be easily provided on the rear surface of the speaker 1 simply by joining the inner panel 10a to which the speaker 1 is mounted and the outer panel 10b using an adhesive or the like. Further, the wall member 3 and the outer panel 10b are attached to each other so as to sandwich an elastic body such as independent foamed urethane, for example, and can be sealed. Therefore, the sealed space can be used as a substitute for the speaker box, thereby improving the acoustic performance, particularly the bass sound quality. Further, it is possible to obtain a speaker box structure with a simpler configuration and easier to assemble than a speaker box structure in which a separately provided speaker box, duct, and the like are incorporated in a vehicle door to form a speaker box space.

It is to be noted that such an improvement in low-tone sound quality is caused by the fact that the closed-type speaker box structure does not cause interference of opposite-phase sound generated from the rear of the unit as compared with the open-back type speaker box, so that the characteristic is disturbed. This is an effect obtained from the fact that no occurrence occurs.

As shown in FIG. 5, the ribs 2b for preventing vibration may be formed on the outer panel 10b. Thereby, not only the vibration of the inner panel 10a caused by the sound generated from the speaker 1 but also the outer panel 10a
The vibration of b can also be suppressed, and the acoustic characteristics can be further improved.

Further, as shown in FIG. 6, the inner panel 10a and the outer panel 10b are integrally formed with the inner panel 10a so as to be connected to each other through the vibration preventing ribs 2. Large anti-vibration rib 2a such that one end of the anti-vibration rib 2a is connected along the inner surface of the opposing outer panel 10b.
a may be formed. Thereby, the inner panel 10
Since a and the outer panel 10b are integrated, the generation of vibration can be more effectively suppressed, and the rigidity of the door panel can be increased. Further, since the vibration preventing ribs 2a are integrally formed when the inner panel 10a is formed, the step of separately forming the vibration preventing ribs 2a and connecting to the inner panel 10a can be omitted.

In the present embodiment, the hatchback door 10 as an example of the present invention has been described, but the present invention is not limited to this.

For example, although the hatchback door 10 has been described as an example of a vehicle door, the present invention is not limited to this, and can be applied to doors on both sides. However, application to the hatchback door 10 having no elevating glass, as in the present embodiment, is particularly preferable because it is easy to create a sealed space that can replace a speaker box.

Further, the example in which the vibration preventing rib 2 is formed only on the inner panel 10a or on both the inner panel 10a and the outer panel 10b has been described, but the present invention is not limited to this. Needless to say, it may be formed only on the outer panel 10b. However, when the vibration preventing rib 2 is formed on the side of the outer panel 10b, sink is likely to occur on the surface opposite to the surface on which the vibration preventing rib 2 is formed, which is the exterior painted surface of the vehicle body. Care must be taken to make the thickness as thin as possible.

The large-size vibration preventing rib 2a has been described with reference to an example in which it is integrally formed with the inner panel 10a and bonded to the outer panel 10b with an adhesive as shown in FIG. The present invention is not limited to this. For example, integrally formed vibration prevention ribs 2 may be formed on both the inner panel 10a and the outer panel 10b, and the vibration prevention ribs 2 may be joined with an adhesive or the like.

The joint between the vibration preventing rib 2 and the outer panel 10b and the joint between the vibration preventing ribs 2 are as follows.
In addition to joining with an adhesive, another joining method such as joining by applying heat to the inner panel 10a and the outer panel 10b made of a thermoplastic resin and melting them may be adopted.

Further, in this embodiment, an example has been described in which the wall member 3 is provided as a partition plate in order to form a closed speaker box space, but the present invention is not limited to this. is not. Even when the wall member 3 is not formed, the speaker 1, the inner panel 10a,
If the space formed by the outer panel 10b is sealed, a loudspeaker structure having high acoustic characteristics can be obtained as described above.

The speaker box structure of the vehicle door according to the present invention comprises an inner panel 10 a and an outer panel 1.
0b is integrally molded, and the speaker 1 may be attached to the inner panel side.

Even when the inner panel 10a and the outer panel 10b are integrally molded as described above, if the closed space is arranged at the back of the speaker 1 when the speaker 1 is mounted, the closed space is provided. By using as an alternative to the speaker box, the same effect as described above can be obtained.

[0050]

As described above, the speaker box structure of the vehicle door according to the present invention is a speaker box sealed on the back side of the speaker by connecting the inner panel with the speaker attached thereto and the outer panel. In this configuration, a space is formed.

Therefore, as compared with the case where the speaker box is formed separately and provided on the back of the speaker, the speaker box structure which has a simple configuration, is easy to assemble, and has excellent acoustic characteristics, particularly excellent bass characteristics. This has the effect that it can be obtained.

Further, it is more preferable that at least one of the inner panel and the outer panel has a speaker box wall for partitioning the speaker box space on a surface of the sealed speaker box space side.

Therefore, by providing the speaker box wall, the volume of the speaker box space formed on the back of the speaker can be freely changed. Therefore,
For each speaker that emits sound waves in different frequency ranges,
The speaker box can be made to have an optimum volume, and an advantageous effect of obtaining good acoustic characteristics can be obtained.

A rib formed in a direction substantially perpendicular to the rear surface of the speaker is provided around at least one of the inner panel and the outer panel on the surface of the closed speaker box space side. More preferably, a member is provided.

Therefore, a rib member extending in a direction substantially perpendicular to the rear surface of the speaker, that is, in a direction substantially perpendicular to the direction in which sound waves emitted from the rear surface of the speaker travel, is formed on the surface of the internal panel or the external panel. Has been
Vibration of the internal panel or the external panel due to the influence of sound waves can be suppressed. Therefore, since vibrations generated in both panels forming the speaker box are suppressed, it is possible to prevent generation of noise such as chattering sound and to obtain an effect of obtaining good acoustic characteristics.

It is more preferable that the internal panel and the external panel are connected via the rib member.

Therefore, since the rib member is formed up to the surface of the opposing panel, the rigidity of the vehicle door can be increased, and the vibration due to the sound wave emitted from the speaker can be more effectively suppressed. This has the effect of obtaining excellent acoustic characteristics.

It is more preferable that the rib member and / or the speaker box wall are integrally formed on at least one surface of the inner panel and the outer panel.

Therefore, it is not necessary to mount the rib member and the speaker box wall portion on the internal panel or the external panel after molding the same into a plate shape, and the production process of the vehicle door can be simplified.

It is more preferable that both the inner panel and the outer panel are formed of resin.

Therefore, it is possible to form at a lower cost than when using a metal such as iron or aluminum as a raw material, and it is possible to improve the degree of freedom in shape design.

Further, it is more preferable to use a bonding agent for bonding the inner panel and the outer panel.

Therefore, the inner panel and the outer panel can be firmly joined together, and the bonding agent absorbs the dimensional error between the molded panels, thereby expanding the allowable range of the molded dimensions of the panels. There is an effect that the yield can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a schematic structure of a speaker box provided in a vehicle door according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an internal configuration of an inner panel side of the vehicle door of FIG. 1;

FIG. 3 is a perspective view showing an appearance of an outer panel side of the vehicle door of FIG. 1;

FIG. 4 is an enlarged view showing a configuration of a speaker rear part of the vehicle door of FIG. 2;

FIG. 5 is a sectional view showing another example of the speaker box structure of the vehicle door of the present invention.

FIG. 6 is a sectional view showing still another example of the speaker box structure of the vehicle door according to the present invention.

[Explanation of symbols]

1 speaker 2 Rib for preventing vibration (rib member) 2a Rib for preventing vibration (rib member) 2b Vibration prevention rib (rib member) 3 wall member (speaker box wall) 5 Adhesive (bonding agent) 6 Rear glass 10 Hatchback door (vehicle door) 10a Inner panel (inner panel) 10b Outer panel (outer panel)

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Naoyuki Ikemizu             Higashihiroshima City, Hiroshima Prefecture             1. Inside GP Daikyo Co., Ltd. (72) Inventor Ii Kura ▼ Takeshi             Higashihiroshima City, Hiroshima Prefecture             1. Inside GP Daikyo Co., Ltd. (72) Inventor Toshihiro Hara             Mazda 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima             Inside the company (72) Inventor Tsukasa Harada             Mazda 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima             Inside the company (72) Inventor Koichiro Yamaguchi             Mazda 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima             Inside the company (72) Inventor Akihiro Akihiro             Matsushita Electric, 1006 Kadoma, Kazuma, Osaka             Sangyo Co., Ltd. F term (reference) 5D017 AD36 AE14

Claims (7)

[Claims] 1. An internal panel to which a speaker is attached,
A speaker box structure for a vehicle door including an outer panel joined to the inner panel, wherein the inner panel to which the speaker is attached is connected to the outer panel, whereby the speaker is sealed on the rear side of the speaker. A speaker box structure for a vehicle door, wherein a box space is formed. 2. The method according to claim 2, wherein the inner panel and the outer panel are:
2. A speaker box wall portion that partitions the speaker box space on at least one of the surfaces on the side of the sealed speaker box space.
4. The speaker box structure for a vehicle door according to claim 1. 3. The internal panel and the external panel,
2. The device according to claim 1, further comprising a rib member formed in a direction substantially perpendicular to a rear surface of the speaker, in a vicinity of the speaker on at least one surface of the sealed speaker box space side. 3. The speaker box structure of the vehicle door according to 2. 4. The speaker box structure for a vehicle door according to claim 3, wherein the inner panel and the outer panel are connected via the rib member. 5. The vehicle door according to claim 3, wherein the rib member and / or the speaker box wall are integrally formed on at least one surface of the inner panel and the outer panel. Speaker box structure. 6. An apparatus according to claim 1, wherein said inner panel and said outer panel are both formed of resin.
A speaker box structure for a vehicle door according to any one of the preceding claims. 7. A bonding agent for bonding the inner panel and the outer panel.
A speaker box structure for a vehicle door according to any one of the preceding claims.