JPS607931Y2 - Deflector in vehicle sunroof - Google Patents

Description

[Detailed Description of the Invention] The disclosed technology is intended to prevent air vibrations called windslop that occur when a vehicle is driven with its sunroof open.

Therefore, this invention relates to a deflector in which an airflow separation plate is provided upright at the front end of a roof window that is opened and closed by a sunroof door to separate airflow from the vehicle body. This invention relates to a deflector in a sunroof of a vehicle that is folded into a dogleg shape in front of the vehicle due to wind force when the vehicle is traveling at high speed.

It is generally known that air vibrations called windslop occur in automobiles in which the roof window is opened by opening the sunroof door.

The wind slop phenomenon occurs when the vehicle body 1 as shown in FIG.
The air flow a flowing along the top surface generates a Karman vortex at the roof window 2 of the sunroof, and the frequency N of this Karman vortex resonates with the natural frequency f0 of the air inside the vehicle body 1. is the cause.

As shown in the graph of Fig. 7, resonance between the re-vibration frequency N and chito usually occurs when the vehicle speed is 50 to 80 krlt/h.
The above windslop occurs within this vehicle speed range.

In order to deal with this, conventional measures have been taken to prevent the occurrence of Karman vortices by installing an airflow separation plate 3 upright at the front end of the roof window 2 to separate the airflow a from the vehicle body 1. If such an airflow separation plate 3 is provided, it must be stored inside the sunroof door when the roof window 2 is closed by the sunroof door, and a large separation plate has disadvantages such as a large storage space.

Furthermore, the presence of this separation plate causes new problems such as increased air resistance and generation of wind noise during high-speed running.

The purpose of this invention was to eliminate the above-mentioned problems with conventional vehicle sunroofs by making the airflow separation plate installed at the front end of the roof window foldable forward into a dogleg shape. It is an object of the present invention to provide a deflector for a sunroof of a vehicle that is easy to install and can prevent the generation of wind noise during high-speed driving.

The structure of this invention is to prevent the generation of Karman vortices at the roof window by separating the airflow flowing along the upper part of the vehicle body from the vehicle body by an airflow separation plate installed upright at the front end of the roof window when the vehicle is running. The separator plate is folded into a dogleg shape by the wind force when the vehicle speed is high, preventing an increase in air resistance, and the airflow separator plate also prevents wind slop from occurring when the sunroof door is closed. The gist of this is that it can be stored efficiently in a square shape.

Next, an embodiment of this invention will be described below based on FIGS. 1 to 5.

Figure 1 shows a vertical cross-section of the deflector according to this invention in a slanted view, Figure 2 shows the end face of the cut part in Figure 1, and Figure 3 shows a vertical cross-section with the sunroof door closed. It is.

Reference numeral 11 in the figure is a sunroof, and a roof window 12 is opened in the center, and the roof window 12 has a sunroof door 13.
It can be opened and closed by.

Both sides of the sunroof door 13 are guided by grooves 15 of a guide member 14 disposed around the roof window 12, and the sunroof door 13 is moved along the roof window 12 by a drive device (not shown) provided at the rear of the roof window 12. It is designed to slide forward from the rear of the vehicle.

An airflow separation plate 16 is provided at the front end of the roof window 12.
The airflow separation plate 16 is divided in the center and connected by a pin 17, so that it can be folded into a dogleg shape that bends backwards toward the front of the vehicle.
Further, its lower end is supported by a front end 19 of an inner frame 18 formed in a concave shape at the front end of the roof window 12.

The tip of a support rod 20 is connected to the upper end of the air flow separation plate 16 via a pin 21, and the base end of the support rod 20 is pivotally supported inside the guide member 14 by a pin 22.

A leaf spring 23 is fixed inside the guide member 14, and the tip of the leaf spring 23 is in contact with the lower surface of the support rod 20, so that the airflow separation plate 16 is always open as shown in FIG. The support rod 20 is urged upward so as to maintain this.

Incidentally, the urging force by the leaf spring 23 is applied when the vehicle speed is 80krr.
It is set so that the force is such that the airflow separation plate 16 is folded by wind pressure when the airflow is at a high speed of 1/h or more.

In the above configuration, when the sunroof door 13 is slid to open the roof window 12, the airflow separation plate 16 is brought into an open and upright state by the urging force of the leaf spring 23, as shown in FIG.

When the vehicle travels in this state, the air flow a flowing along the vehicle body is separated from the vehicle body by the air flow separation plate 16, thereby preventing the generation of Karman vortices at the roof window 12, thereby preventing the occurrence of windslop.

Therefore, when the vehicle speed increases to 80 m/h or more and exceeds the windslop generation area (see the graph in Figure 7), the fifth
As shown in the figure, the airflow separation plate 16 is subjected to a large wind pressure, which overcomes the force of the leaf spring 23 and folds the airflow separation plate 16 into a dogleg shape.

Therefore, the air resistance due to the air flow separating plate 16 is reduced, and the generation of wind noise is also prevented.

Next, when the roof window 12 is closed by the sunroof door 13, the support rod 20 is pushed down by the sliding sunroof door 13, thereby folding the airflow separating plate 16 into a dogleg shape, and opening the sunroof door as shown in FIG. It is stored at the bottom of 13.

It should be noted that the aspect of this invention is not limited to the above-described embodiment, and it goes without saying that the spring is not limited to the plate spring 23, but may be a wound spring.

As described above, according to this invention, the airflow separation plate is foldable into a dogleg shape that bends backward from the front of the vehicle, and the airflow separation plate is biased in the direction of expansion by the spring, so that the windshield At vehicle speeds where slop is likely to occur, the airflow separation plate is in an upright state, and when the vehicle speed is high, the airflow separation plate is folded into a dogleg shape, effectively preventing increases in air resistance and generation of wind noise. This has the effect of making people feel more comfortable.

Since the airflow separation plate is folded into a dogleg shape and stored inside the sunroof door, even if the airflow separation plate is large, the storage space is small and the storage mechanism can also be simplified. There are benefits.

[Brief explanation of the drawing]

Figures 1 to 5 show examples of this invention.
Fig. 1 is a perspective view showing a longitudinal section of a deflector in a sunroof door of a vehicle, Fig. 2 is an end view of the longitudinal section of Fig. 1,
Figure 3 is a vertical cross-sectional view showing the sunroof door closed;
Fig. 4 is a structural schematic diagram showing the state during medium and low speed running, Fig. 5 is a structural schematic diagram showing the high speed running state, Fig. 6 is an action diagram showing the phenomenon of wind slop, and Fig. 7 is a structural diagram showing the state of wind slop. It is a graph showing the outbreak area. 13... Sunroof door, 12... Roof window, 16... Air flow separation plate, 23...
・Spring, a... Airflow, b... Karman vortex, N... Frequency of Karman vortex, Chi...
...Natural frequency of the air inside the car.

Claims (1)

[Scope of utility model registration request] In a sunroof deflector for a vehicle in which an airflow separation plate is provided upright at the front end of a roof window that is opened and closed by a sunroof door, the airflow separation plate is foldable into a dogleg shape that bends forward and backward of the vehicle. A deflector for a sunroof of a vehicle, characterized in that the deflector is biased by a spring in the direction of expanding the folding portion, and the biasing force of the spring is set to such an extent that the separating plate is folded by wind force when the vehicle is running at high speed. .