JPH024547Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to an in-vehicle speaker device, and more particularly to an in-vehicle speaker device housed in a half-box type cabinet and installed on the rear tray of an automobile.

BACKGROUND ART Conventionally, in this type of device, as shown in FIG.
A half-box type cabinet 2 housing the speaker 1 is placed on the rear tray board 3 so as to cover a large-diameter hole 4 made in the rear tray board 3, and is protruded from the back of the speaker 1. )5 is fixed to the rear tray frame 5 by a screw 6 passing through the hole 4 and a thumbscrew 7 screwed thereto, and the back pressure of the speaker 1 is transferred to the hole 4 of the rear tray board 3 and the rear tray frame 5.
The rear tray board 3 is discharged into a trunk room (not shown) through a plurality of holes 8 drilled in the rear tray board 3, and the trunk room is used as a back cavity. Since there is no gap between the rear tray frame 5 and the rear tray frame 5, the number of holes 8 in the rear tray frame 5 through which back pressure can pass is limited, which is one reason why the back pressure cannot be sufficiently discharged and has a negative effect on acoustic characteristics. I was getting used to it. Furthermore, in order to eliminate this adverse effect, it was necessary to perform extensive processing on the rear tray frame 5, which is a steel plate, and the installation work was troublesome.

Summary of the invention This invention was created in view of the points mentioned above.
It is an object of the present invention to provide an on-vehicle speaker device that is easy to install, can sufficiently relieve back pressure, and can obtain good acoustic characteristics.

The in-vehicle speaker device according to the present invention is characterized in that a spacer is inserted into the gap between the rear tray board and the rear tray frame, and a communication path is formed in the spacer to allow communication between the inside and outside of the spacer.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a cross-sectional view showing one embodiment of the present invention, in which parts equivalent to those in FIG. 1 are designated by the same reference numerals. In the figure, rear tray board 3
The structure is the same as that shown in FIG. 1 except that a spacer 10 is inserted into the gap between the rear tray frame 5 and the rear tray frame 5. The spacer 10 is formed into a rectangular ring shape with a core material made of molded plastic such as ABS or a plate-like member such as wood, and has a plurality of through holes 11 on each side as communication paths that communicate the inside and outside of the spacer. It is formed. This spacer 10 is clamped and fixed between the cabinet 2 and the rear tray frame 5 by tightening them together with screws 6 and thumbscrews 7. As a result, the speaker 1, cabinet 2, and rear tray board 3 are firmly fixed to the rear tray frame 5.
This means that the occurrence of so-called rattling noise can be reliably prevented. Furthermore, the above-mentioned fixation can be made more solid by pasting a viscoelastic material such as urethane foam, rubber, or felt on the upper and lower surfaces of the spacer 10, that is, the contact area (surface) between the rear tray board 3 and the rear tray frame 5. can do.

According to this configuration, even when the plurality of holes 8 of the rear tray frame 5 are distributed over a wide range, the back pressure of the speaker 1 is applied in the vertical direction as in the conventional case, and the back pressure of the speaker 1 is applied in the horizontal direction by the through holes 11 of the spacer 10. Therefore, the back pressure can be sufficiently relieved without any special processing on the rear tray frame 5, and good acoustic characteristics can be obtained.

In the above embodiment, the through hole 11 is formed in the spacer 10, but a groove may be formed in at least one of the upper surface and the lower surface.
Any material that can communicate between the inside and the outside is sufficient.

Effects As explained above, according to the present invention, a spacer is inserted into the gap between the rear tray board and the rear tray frame, and a communication path is formed in this spacer to communicate between the inside and outside of the spacer. It is possible to obtain an on-vehicle speaker device that can sufficiently release pressure, obtain good acoustic characteristics, and is easy to install because no processing is required on the vehicle body.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional example, FIG. 2 is a sectional view showing an embodiment of the present invention, and FIG. 3 is a perspective view showing the spacer in FIG. 2. Explanation of symbols of main parts, 1...Speaker, 2...
...cabinet, 3...rear tray board, 5...
...Rear tray frame, 10...Spacer, 11
...through hole.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An in-vehicle speaker device housed in a half-box type cabinet and installed on the rear tray of an automobile, comprising a spacer inserted into the gap between the rear tray board and the rear tray frame, The vehicle-mounted speaker device is characterized in that the spacer has a communication path that communicates between the inside and outside of the spacer. (2) The vehicle-mounted speaker device according to claim 1, wherein the spacer is fixed by being sandwiched between the cabinet and the rear tray frame. (3) The spacer has an annular plate member as a core material,
The vehicle-mounted speaker device according to claim 1 or 2, wherein a viscoelastic member is attached to a contact portion between the rear tray board and the rear tray frame.