Door mirror structure

Abstract

To prevent noise from being generated in a cabin caused by flowing travel wind along a side glass from a door mirror.SOLUTION: A door mirror structure 10 includes a door mirror 12 for a vehicle, and an air flow guide 16 which is provided on the end on a vehicle rear side on the upper surface of the door mirror 12. The air flow guide 16 guides travel wind so that the travel wind generated when the vehicle travels flows to outside a vehicle along the air flow guide 16.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a door mirror structure provided in a vehicle. [Background technology]

[0002] Door mirrors are provided on the sides of vehicles to allow drivers to see what is behind them. Door mirrors protrude from the vehicle exterior. As a result, air resistance created by the door mirrors while the vehicle is moving generates vortices around the door mirrors, generating wind noise. Because door mirrors are installed close to seats such as the driver's seat in the vehicle interior, wind noise can be a disturbance to drivers and other occupants.

[0003] Patent Document 1 describes a door mirror structure that prevents airflow flowing over the door mirror while driving from heading toward the door by forming a raised portion at the end of the door mirror on the base side. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-105977 Summary of the Invention [Problem to be solved by the invention]

[0005] According to the door mirror structure described in Patent Document 1, part of the airflow divided by the rising portion flows along the side glass, and this part can cause noise inside the vehicle cabin.

[0006] An object of the present disclosure is to reduce noise generated inside the vehicle cabin due to wind flowing from the door mirror along the side window. [Means for solving the problem]

[0007] One aspect of the present disclosure is a door mirror for a vehicle,The door mirror is configured as a separate body, and an air flow guide provided on the upper surface of the door mirror at the rear side of the vehicle, the air flow guide is provided so as to protrude from the upper surface and extend from the inside to the outside of the vehicle, the front surface of the air flow guide on the front side of the vehicle becomes higher from the front to the rear based on the upper surface and is a curved surface that is concave toward the bottom of the vehicle, the height of the air flow guide toward the top becomes higher from the inside to the outside of the vehicle based on the upper surface, and the air flow guide guides the wind generated when the vehicle is moving so that the wind flows along the air flow guide to the outside of the vehicle. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to reduce noise generated inside the vehicle cabin due to the wind flowing from the door mirror along the side window. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a front view of a door mirror structure according to an embodiment of the present invention, as viewed from the front side of a vehicle. [Figure 2] 1 is a rear view of the door mirror structure according to the embodiment, as seen from the rear of the vehicle. [Figure 3] 1 is a perspective view of an airflow guide according to an embodiment when viewed from the front of a vehicle. [Figure 4] 4 is a cross-sectional view taken along the line AA in FIG. 3. [Figure 5] 1 is a perspective view of an airflow guide according to an embodiment when viewed from the front of a vehicle. [Figure 6] 1 is a perspective view of an airflow guide according to an embodiment when viewed from the rear of a vehicle. [Figure 7] 1 is a front view of a door mirror structure according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] A door mirror structure 10 according to an embodiment will be described with reference to Figures 1 and 2. Figure 1 is a front view of the door mirror structure 10 as seen from the front side of the vehicle. Figure 2 is a rear view of the door mirror structure 10 as seen from the rear side of the vehicle.

[0011] The door mirror structure 10 includes a door mirror 12 and an airflow guide 16. The door mirror 12 includes a door mirror cover 14 and a mirror body, which is a mirror element, and is fixed to, for example, a side door of the vehicle. The door mirror cover 14 holds the mirror surface of the mirror body exposed to the rear of the vehicle. The mirror body is not shown in Figure 2. The front portion of the door mirror cover 14 (hereinafter referred to as the "front portion 14a") protrudes toward the front of the vehicle, and its upper surface is shaped to slope upward toward the rear.

[0012] The airflow guide 16 is provided on the vehicle rear side of the upper part 14b of the door mirror cover 14. The airflow guide 16 is provided on the upper part 14b from the inside to the outside of the vehicle. The airflow guide 16 guides the wind generated while the vehicle is moving so that it flows along the airflow guide 16 to the outside of the vehicle.

[0013] The airflow guide 16 is shown in Figures 3 to 6. Figures 3 and 5 are perspective views of the airflow guide 16 as seen from the front of the vehicle. Figure 4 is a cross-sectional view taken along line AA in Figure 3. Figure 6 is a perspective view of the airflow guide 16 as seen from the rear of the vehicle.

[0014] 3 to 5, the surface of the airflow guide 16 on the vehicle front side (hereinafter referred to as "front surface 18") is a curved surface having a recess. In other words, the front surface 18 is a concave surface that recesses downward toward the vehicle.

[0015] Furthermore, when the bottom surface 20 of the air flow guide 16 (the surface that contacts the door mirror cover 14) is taken as the reference, the height of the air flow guide 16 increases from the inside of the vehicle toward the outside of the vehicle. As a result, the front surface 18 of the air flow guide 16 becomes wider from the inside of the vehicle toward the outside of the vehicle.

[0016] 4 and 6, the surface of the airflow guide 16 on the vehicle rear side (hereinafter referred to as the "rear surface 22") is a surface that is perpendicular to the bottom surface 20 of the airflow guide 16. Of course, the rear surface 22 may not be completely perpendicular to the bottom surface 20, but may be a surface that is approximately perpendicular to the bottom surface 20. In other words, the rear surface 22 may be inclined by several degrees toward the front or rear of the vehicle from the vertical direction.

[0017] The operation of the door mirror structure 10 will be described with reference to Figures 5 to 7. Figure 7 is a front view of the door mirror structure 10 as seen from the front of the vehicle. In Figure 7, the flow of wind caused by running is indicated by arrows 24. In Figure 5, the flow of airflow is indicated by arrows 26.

[0018] As the vehicle moves, the wind flows over the front portion 14a of the door mirror 12 toward the rear of the vehicle and strikes the airflow guide 16 provided on the upper portion 14b of the door mirror cover 14. The front surface 18 of the airflow guide 16 is concave, and the height of the airflow guide 16 increases from the inside of the vehicle to the outside of the vehicle. Therefore, as shown by arrow 24 in Figure 7, the wind flows from the inside of the vehicle to the outside of the vehicle along the airflow guide 16. More specifically, as shown by arrow 26 in Figure 5, when the wind flowing inside the vehicle strikes the concave front surface 18, the wind is straightened in a spiral by the front surface 18 and flows toward the outside of the vehicle while gradually increasing its flow velocity. The size of arrow 26 corresponds to the magnitude of the flow velocity. Because the flow velocity of the wind flowing outside the vehicle is greater than the flow velocity of the wind flowing inside the vehicle, the pressure outside the vehicle is lower than the pressure inside the vehicle. Therefore, the wind flowing inside the vehicle is sucked out to the outside of the vehicle. In this way, the wind flowing inside the vehicle is discharged to the outside of the vehicle, so the wind moves away from the side window and the amount of wind flowing toward the side window is reduced, thereby reducing noise generated inside the vehicle cabin due to the wind flowing along the side window.

[0019] For example, in a BEV (Battery Electric Vehicle), road noise and wind noise are the main noises. According to this embodiment, noise caused by wind noise can be reduced, so that noise can be effectively reduced even in a BEV.

[0020] Furthermore, because the rear surface 22 of the airflow guide 16 is a surface that is perpendicular or substantially perpendicular to the bottom surface 20, the rear surface 22 functions as a wall surface that suppresses the inflow of traveling wind behind the door mirror 12. This suppresses the generation of wake vortices behind the door mirror 12 and the intrusion of wake vortices into the door mirror cover 14. This suppresses the generation of resonance inside the door mirror cover 14.

[0021] Furthermore, when the traveling wind is rectified and flows from the inside to the outside of the vehicle, a force (downforce) acts on the door mirror cover 14 to press it downward on the vehicle. Explaining this point in more detail, if the airflow guide 16 is not provided and the wind flowing from the front to the rear of the vehicle is constant, according to Bernoulli's principle, the pressure below the vehicle will be higher than the pressure above the vehicle. In other words, buoyancy will occur. In contrast, in this embodiment, the airflow guide 16 is provided on the door mirror 12, so the airflow guide 16 guides the wind to flow toward the upper part of the vehicle. This causes the pressure above the vehicle to be higher than the pressure below the vehicle. As a result, a force (downforce) that presses the vehicle downward acts on the vehicle. This allows the vehicle body to be stabilized while traveling.

[0022] The air flow guide 16 is configured as a separate body from the door mirror 12. This makes it easy to replace the air flow guide 16. Also, the air flow guide 16 can be attached to the door mirror 12 later. Of course, the air flow guide 16 may be configured as an integral part of the door mirror 12. For example, the door mirror cover 14 and the air flow guide 16 may be configured by integral molding. [Explanation of symbols]

[0023] 10 Door mirror structure, 12 Door mirror, 14 Door mirror cover, 16 Air flow guide.

Claims

1. a door mirror for a vehicle; an airflow guide configured separately from the door mirror and provided on a vehicle rear side portion of an upper surface of the door mirror; In a door mirror structure having the airflow guide is provided from the inside to the outside of the vehicle so as to protrude from the upper surface, a front surface of the air flow guide on the vehicle front side is a curved surface that increases in height from the front side to the rear side with respect to the upper surface and is recessed downward of the vehicle, an upward height of the airflow guide increases from the inside to the outside of the vehicle with respect to the upper surface; The airflow guide guides wind generated when the vehicle is running so that the wind flows along the airflow guide to the outside of the vehicle. A door mirror structure characterized by the above.

2. The door mirror structure according to claim 1, The air flow guide includes a vehicle front surface, a bottom surface that contacts an upper surface of the door mirror, and a vehicle rear surface. A door mirror structure characterized by the above.

3. The door mirror structure according to claim 1, The surface of the air flow guide on the vehicle rear side is a surface perpendicular to the bottom surface of the air flow guide. A door mirror structure characterized by the above.

Images