JPH0133389Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is a rear parcel shelf structure for vehicles.
In particular, the present invention relates to a rear parcel shelf structure for a vehicle that has the functions of placing objects, a speaker, and an air duct for ventilation.

Rear parcel shelves were originally intended for storing small items, but with the spread of car stereos, sound devices are often installed on rear parcel shelves. An example of a conventional rear parcel shelf equipped with a sound device is shown in Figure 1 (1977).
A normal speaker unit 1 equipped with a diaphragm made of cone paper or the like (see Publication No. 117836) is used as a single full-range type, or in combination as a multi-way type. It is either buried in a predetermined position in the rear parcel shelf 2 or housed in a speaker box 3 placed on the rear parcel shelf 2 as shown in FIG. However, in order to sufficiently reproduce low frequencies with the structure shown in Fig. 1, in which a normal speaker unit 1 made of paper cone or the like is buried in the rear parcel shelf 2, it is necessary to use a speaker unit 1 with a somewhat large diameter. Therefore, there are restrictions on the mounting position, etc., and at the same time, there is an inconvenience that a space for storing small items cannot be effectively secured. Furthermore, in the case of FIG. 2 (see Utility Model Application Publication No. 1983-2034), in which the large speaker box 3 housing the speaker unit 1 is placed on the rear parcel shelf 2, there is the inconvenience that the rear view is obstructed. arise. In order to eliminate this inconvenience, the applicant first applied acoustic vibration to various interior panel members such as plywood and foamed resin panels used in various parts of the vehicle, such as the rear parcel trim 4 of the rear parcel shelf 2. We proposed a vehicle acoustic device in which the driver is held and the interior plate member itself is used directly as a diaphragm (Japanese Patent Application No. 135114/1982, Japanese Patent Application Laid-Open No. 1983-1999).
(Refer to Publication No. 60191) According to this, a sufficient vibration area can be secured without occupying space in the vehicle interior, so sound reproduction comparable to that of a large-diameter speaker is possible.

However, if the rear parcel trim 4 itself is used as a diaphragm, if a parcel is placed on top of it, the acoustic effect may be obstructed by the parcel, or the parcel may resonate and emit abnormal noise, or the parcel may cause physical discomfort. When you touch it, you may feel vibrations and feel uncomfortable.

On the other hand, conventionally, for example, the third
As shown in the enlarged view in the figure, it is generally adopted to take in cabin air through an opening 5 formed in the rear parcel trim 4 and guide it to a drafter (not shown). An air duct 6 was used. This inevitably increases costs and the number of installation steps.

This idea was devised by focusing on the drawbacks of the conventional method, and was developed by leaving some space on the back side of the rear parcel trim placed on the shelf panel in the vehicle width direction. In addition, a flat plate whose front and rear edges are sealed with a sealing material is integrally provided, and an acoustic vibration driver is held on this flat plate to form an acoustic unit, and an opening formed on the rear parcel trim is connected to the rear parcel trim through the above-mentioned space. By communicating with the drafter, in addition to the function of placing objects as a rear parcel shelf, the function of a speaker is added, and furthermore, the function of an air duct for ventilation is added, and these functions are efficiently exerted. is its purpose.

This invention will be explained below based on the illustrated embodiments.

4 to 6 are diagrams showing an embodiment of this invention. First, to explain the structure, 10 in the figure is a rear parcel shelf, and 11 is a shelf panel. The shelf panel 11 forms a part of a so-called vehicle body panel, and serves as the basis for forming the rear parcel shelf 10. This shelf panel 11
A rear parcel trim 12 is arranged on top. The rear parcel trim 12 is made of a common synthetic resin material and is provided with suitable ventilation openings 15. And the back side 1 of this rear parcel trim 12
A flat plate 14 is provided over the entire width of the vehicle 2a with a slight space 16 left behind the back surface 12a. The front and rear edges 14a and 14b of the flat plate 14 are sealed with a sealing material 17, and the rear parcel trim 1
Together with 2, an air duct 18 is formed through which vehicle interior air flows from the opening 115 of the rear parcel trim 12 to a drafter (not shown) via the space 16. On the other hand, the flat plate 14 holds an acoustic vibration driver 13, and the flat plate 14 itself serves as a diaphragm and is formed as an acoustic unit that generates sound. For this reason, the elasticity, size, thickness, weight, etc. of the flat plate 14 are set in consideration of the acoustic frequency band to be reproduced. space 1
The width W of 6 is preferably as wide as possible from the viewpoint of ensuring the cross-sectional area of the air duct 18 or from the viewpoint of smoothing the vibration caused by the vibration driver 13 of the flat plate 14. This will be determined in consideration of securing other spaces (for example, a trunk room).
In this embodiment, the flat plate 14 and the vibration driver 1
An acoustic unit consisting of three parts is used as a woofer for both the left and right sides, and separate left and right tweeters 19 are provided separately to reproduce sound in a so-called 3D stereo system. When resonance or muffledness occurs during design and manufacturing, it is effective to provide appropriate pores 20 in the rear parcel trim 12.
Note that 21 is a rear glass and 22 is a rear seat.

Next, the action will be explained.

By supplying power to the vibration driver 13, the flat plate 14
The sound generated by the vibration is the rear parcel trim 12.
It is sent out into the vehicle interior through the opening 15 of. Even during such sound reproduction, the rear parcel trim 12 does not vibrate, and the parcels placed on it do not vibrate.Furthermore, the air inside the vehicle is drained through the opening 15 of the rear parcel trim 12. It flows through the space 16 formed by the flat plate 14, is reliably guided to the drafter from both ends in the vehicle width direction, and is discharged to the outside. Incidentally, when the rear parcel trim 12 is provided with the pores 20, sound is also transmitted through the pores 20, and air inside the vehicle is taken in.

As explained above, according to this invention, since the above structure is adopted, almost the entire rear parcel trim can be used as a shelf for placing small items. Although it has a built-in acoustic unit, the diaphragm does not protrude from the surface, so small objects placed on it will not resonate or cause discomfort when touched, and the area of the diaphragm is large enough to be used as an acoustic unit. This makes it easy to design especially low frequency range reproduction, and furthermore, there is no need to separately provide a dedicated ventilation air duct, which has the effect of simplifying the structure and reducing costs.

[Brief explanation of the drawing]

1 and 2 are schematic perspective views showing a conventional example of a rear parcel shelf structure for a vehicle, FIG. 3 is a sectional view taken along the line shown in FIG. 1, and FIG. 4 shows an embodiment of this invention. The schematic perspective views shown in FIGS. 5 and 6 are sectional views taken along lines - and - in FIG. 4, respectively. 10...Rear parcel shelf, 11...Shelf panel, 12...Rear parcel trim, 12
a...back surface, 13...excitation driver, 14...flat plate, 14a...front edge, 14b...rear edge, 15...
Opening, 16...space, 17...sealing material.

Claims (1)

[Scope of utility model registration request] A flat plate is integrally provided on the entire back side of the rear parcel trim placed on the shelf panel in the vehicle width direction, leaving a slight space between the back side and the front and rear edges sealed with a sealing material. A rear parcel shelf structure for a vehicle, characterized in that an acoustic unit is formed by holding a driver, and an opening formed on a rear parcel trim and a drafter are communicated through the space.