JPH07304398A - Door speaker device for automobile - Google Patents

Abstract

PURPOSE:To provide the sufficient enclosure capacity for a speaker by utilizing the body, as for a door speaker device for automobile. CONSTITUTION:A speaker body 11 equipped with a speaker box 12 at the back is installed on a door inner panel 1a. An opened port part is formed on the side surface of the door hinge side the speaker box 12, and an opened port part 13a which communicates to the opened port part is formed on a door side surface panel, and an opened port part 21 which communicates to the opened port part 13a in door closure is installed on a cowl side panel 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door speaker device for an automobile, in which a speaker body with a speaker box is housed in a door facing a vehicle interior.

[0002]

2. Description of the Related Art When a speaker body is attached to a door inner panel in a door speaker device of this type, a vinyl cover covering a service hole of the door inner panel resonates due to back pressure of the speaker, and sounds before and after the speaker interfere with each other. There is a problem that the low frequency characteristics are deteriorated and the sound is distorted by resonating the door trim with back pressure.

In order to avoid such a phenomenon, a speaker box may be attached to the speaker body, but it is not possible to secure a sufficient volume in the door, and therefore, in order to supplement the low tone, the upper back of the body is lowered. It is also practiced to provide a dedicated speaker for the area.

[0004]

However, such a separated two-speaker system is not preferable in terms of sound image localization and has a problem in manufacturing cost.

In view of the above points, the present invention has an object to provide an automobile door speaker device of the kind described at the beginning, which can provide a speaker with a substantially sufficient enclosure capacity by utilizing a body. And

[0006]

In order to achieve this object, the present invention provides a door speaker apparatus for an automobile, in which a speaker body having a speaker box behind is attached to a door inner panel and housed in a door. An opening is formed on the side surface of the box on the door hinge side, an opening communicating with the opening of the speaker box is formed on the door side panel, and a cowl side panel facing this opening is formed on the door side panel opening. It is characterized in that an opening communicating with the door is provided.

[0007]

When the door is closed, the space inside the speaker box communicates with the space inside the cowl side through the opening, the door side panel and the cowl side panel opening, and a sufficient enclosure capacity is added. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A door speaker device according to an embodiment of the present invention will be described with reference to FIGS. Reference numeral 10 denotes a door speaker device, which is a door inner panel 1a of a front door 1 of the automobile.
A speaker box 12 is attached to the back of a speaker body 11 whose four corners are screwed to the inside of the vehicle. The size of this speaker box is the door inner panel 1a.
Also, the glass space 2 is set so that the glass 2 can be moved up and down behind in the door space 3 between the door outer panel 1c. On the side surface 12a on the door hinge side of the speaker box 12,
An elliptic cylindrical portion 13 having an opening 13a at its side end and having a cross-sectional area that does not attenuate the low range is provided in a protruding manner.

The door inner side panel 1b of the door inner panel 1a facing the opening 13a is formed with an opening 9 of the same shape communicating with the opening 13a. A grill 14 is fitted in the opening, and a ring-shaped seal ring 15 is attached to the periphery of the grill 14. The cowl side panel 2 facing the opening 9 in the cowl side 20.
An opening 21 of the same shape is formed in 0a, a grill 22 is fitted therein, and a ring-shaped seal ring 23 is attached to the periphery thereof.

When the door is closed, both seal rings 15,
23 (FIG. 3) is in close contact with each other to securely communicate the speaker box 12 with the internal space of the cowl side 20 through the openings 13a, 9, 21. As a result, the volume of the speaker box 12 is increased by the volume of the cowl side 20,
A substantially sufficient enclosure is obtained. Therefore,
The deterioration of the low frequency range is avoided, and the door trim 4 located around the speaker body 11 and the vinyl cover around the speaker body 11 are not exposed to back pressure, and the resonance phenomenon is avoided.

In the embodiment described above, both openings 9,
In order to prevent foreign matter from entering the grille 21,
In addition to 22, a cloth or the like that does not attenuate acoustic waves may be applied. One of the seal rings 15 and 23 can be omitted depending on circumstances.

As yet another embodiment, as shown by the dotted line in FIG. 1, the bottom panel of the cowl side 20 and the upper surface of the rocker 7 are arranged so that the space inside the rocker 7 communicates with the space inside the cowl side 20. It is conceivable to provide the panel with openings 28 of the same shape and overlapping one another. As a result, the internal space of the rocker 7 can also be used as an enclosure for the speaker box 12. In particular, when the partition wall 25 is provided because there is a hole in the upper portion of the cowl side 20, it is possible to compensate for the reduction of the space volume.

[0013]

According to the first aspect of the invention, the space inside the speaker box communicates with the space inside the cowl when the door is closed, without the need to separately prepare a speaker dedicated to the low frequency range. The enclosure capacity of the upper speaker box is expanded, and deterioration of the low-frequency acoustic characteristics of the speaker is prevented. Since the speaker box type is premised, back pressure is not generated in the door, and resonance of peripheral parts such as the door trim and the vinyl cover is eliminated.

According to the second aspect of the present invention, the opening between the door and the cowl side is surely airtight via the seal ring, and the possibility of sound leakage or resonance of the peripheral portion can be eliminated, and the acoustic Deterioration of characteristics is surely prevented.

According to the third aspect of the present invention, the space inside the cowl side can also be used, and the expansion of the volume or compensation when the use of the volume is restricted can be performed.

[Brief description of drawings]

FIG. 1 is a perspective view of a door speaker device portion according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the door speaker device.

FIG. 3 is a cross-sectional view of the speaker box and a cowl side portion facing each other.

[Explanation of symbols]

 1 Door 1a Door Inner Panel 7 Rocker 9, 13a, 21, 28 Opening 11 Speaker Main Body 12 Speaker Box 15, 23 Seal Ring 20 Cowl Side

Claims (3)

[Claims] 1. A door speaker device for an automobile, in which a speaker main body having a speaker box behind is attached to a door inner panel and housed in a door, wherein an opening is formed in a side surface of a speaker box on a door hinge side and a side surface of the door. An automobile is characterized in that an opening communicating with the opening is formed in the panel, and a cowl side panel facing the opening is provided with an opening communicating with the opening of the door side panel when the door is closed. Door speaker device. 2. The door speaker device for an automobile according to claim 1, wherein a seal ring for airtightness is attached to a peripheral edge of at least one of the door side panel and the cowl side panel. 3. The bottom panel of the cowl side and the top panel of the rocker are provided with overlapping openings so that the space in the rocker communicates with the space in the cowl side. The door speaker device for an automobile according to claim 1.