KR-20260062647-A - Rear-door window air-deflector of vehicle

Abstract

This patent is the result of a project carried out with support from the Phase 3 Leading University Industry-Academic Cooperation (LINC 3.0) project. The rear door window deflector for a vehicle according to the present invention comprises a rotating shaft provided on the front body of the rear door window and arranged in an up-and-down direction, a shaft support provided on the body and supporting the rotating shaft, and a wind guard coupled to the rotating shaft and extended in an up-and-down direction, which rotates toward the body and folds over the body, or rotates toward the outside of the body and unfolds upright from the body.

Inventors

• 손병래

Assignees

• 호남대학교 산학협력단

Dates

Publication Date

20260507

Application Date

20241029

Claims (5)

1. A rotating shaft provided on the front body of the rear door window and arranged in the vertical direction; A shaft support member provided on the vehicle body to support the rotation axis; A rear door window deflector for a vehicle comprising a wind guard coupled to the above-mentioned rotation axis and extended vertically, which rotates toward the vehicle body to be folded in a state overlapping the vehicle body, or rotates toward the outside of the vehicle body to be unfolded in a state upright from the vehicle body.
2. In Article 1, A vehicle rear door window deflector further comprising a step motor provided on the shaft support to rotatably support the rotation shaft so that the rotation shaft can be rotated in predetermined angle units.
3. In Article 1, It further includes an elastically deformable gripper that seals the gap between the vehicle body and the wind guard, The above gripper is A body coupling part fixed to the above body and, A rear door window deflector for a vehicle, comprising a guard coupling portion that extends from the vehicle body coupling portion and is coupled to the wind guard so as to surround the front edge of the wind guard.
4. In Article 1, The above wind guard is a vehicle rear door window deflater having a plurality of through holes.
5. In any one of paragraphs 1 to 4, The above shaft support A vehicle rear door window air deflector comprising a window visor extending in the front-rear direction on the upper body of the rear door window.

Description

Rear-door window air-deflector of vehicle This patent is the result of a project carried out with support from the Phase 3 Leading University Industry-Academic Cooperation (LINC 3.0) project. The present invention relates to a vehicle rear door window air deflector for reducing buffing noise when the rear door of a vehicle is opened. Many drivers frequently open their vehicle windows to enjoy a cool natural breeze instead of the heater or air conditioner while driving, or to circulate the air inside the vehicle. However, as illustrated in Fig. 1, opening the windows while driving causes loud, repetitive noises resembling drumbeats or helicopter sounds—namely, "buffetting noise"—which is painful for the ears of the driver and passengers, leading to significant consumer complaints. Although there are some variations depending on the vehicle, buffetting noise is a low-frequency tone that strongly pressures the ears of occupants within a specific speed range. In particular, SUVs, wagons, and hatchbacks, which have larger interior spaces compared to sedans, are more prone to buffetting noise due to the greater pressure difference between the inside and outside. Regarding this buffetting noise, automakers are not offering active solutions, stating that it is not a vehicle defect and that changing the vehicle design is not an easy task; however, it is emerging as a significant issue for consumers as it causes discomfort, fatigue, and even pain to drivers and passengers. Related prior art includes Korean Registered Patent No. 10-1946553 'Fixing structure of a vehicle deflector', Korean Registered Patent No. 10-2298957 'Support structure of a sunroof deflector for an automobile', and Korean Registered Patent No. 10-2481429 'Wind deflector for an automobile'. However, as disclosed in prior patents, while there is technology related to sunroof deflectors, there is no technology related to the buffetting noise that occurs when the rear window is opened. Furthermore, although the rear window has the same noise generation structure as the sunroof when opened, there is a problem in that it is difficult to install a deflector like that used in sunroof buffetting. In addition, there is a problem in that it is practically difficult to change the door design to solve the buffetting noise when the rear window is opened. Figure 1 is a diagram showing an example of a wind tunnel experiment related to buffetting noise when the rear window is opened while driving a vehicle. FIG. 2 is a drawing showing an example in which a rear door window air deflector for a vehicle according to the present invention is applied. FIG. 3 is an enlarged view of the vehicle rear door window air deflater shown in FIG. 2, showing the wind guard in a folded state. Figure 4 is a drawing of the air deflator shown in Figure 3, with the wind guard extended. Figure 5 is a cross-sectional view along line AA of Figure 3. Figure 6 is a cross-sectional view along line BB of Figure 4. The technical concepts described in the embodiments of the present invention below may be implemented independently or in combination with one another. Furthermore, although the present invention has been described through embodiments described in the drawings and the detailed description of the invention, these are merely illustrative, and various modifications and equivalent alternative embodiments are possible therefrom for those skilled in the art to which the present invention pertains. Accordingly, the technical scope of protection of the present invention should be determined by the appended claims. As illustrated in FIGS. 2 to 6, a vehicle rear door window air deflector according to one embodiment of the present invention is provided with a wind guard (20) that can be folded in the vertical direction as an axis on the front body of the rear door window, i.e., the center pillar (2), and includes the wind guard (20), a rotation axis (22), and an axis support (10). Accordingly, when the rear door window (1) is opened while driving, if the wind guard (20) is unfolded, strong wind blowing from the front is blocked by the wind guard (20) so that it does not blow directly toward the rear door window (1), thereby preventing the unpleasant sensation of strong wind hitting the skin and noise such as buffeting. This wind guard (20) is configured to rotate toward the center pillar (2) so as to be folded over the center pillar (2), or conversely, rotate toward the outside of the center pillar (2) so as to be unfolded upright from the center pillar (2), and may be formed in the shape of a plate. The specific shape of such wind guard (20) can be designed by analyzing the characteristics of internal pressure, noise, and frequency changes depending on whether the rear door window (1) is open or closed while driving for each vehicle type. However, it is preferable that the wind guard (20) be extended vertically in correspondence with the rear door window (1), and that its width in the front-t