JPH1044865A - Automobile door mirror - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress sounds caused by wind blowing against a door mirror while suppressing the expansion thereof. SOLUTION: A door mirror 12 comprises an arm part 14 adapted to be directly fitted to the body of a vehicle, a door-mirror body 16 adapted to be fitted to the vehicle body by way of the arm part 14, and a ventilating hole 18 communicating with the inside of the door-mirror body 16 in the front thereof on the opposed side to the vehicle body. A blast passage 26 is defined between a cover 24 fitted around a mirror body 22 and the inner periphery 16C of the door-mirror body 16 to direct part of draft flowing between the vehicle body and the door-mirror body 16 through the inside of the door-mirror body 16 from the ventilating hole 18 of the door-mirror body 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile door mirror, and more particularly, to an automobile door mirror in which airflow around a door mirror is considered.

[0002]

2. Description of the Related Art When an automobile is running, an airflow flowing between a mirror body of a door mirror and a vehicle body is a so-called rear-closed door mirror in which the flow path between the vehicle body and the mirror body is tapered. , Some of which escape upward. On the other hand, during traveling, the air received by the front window becomes a flow that spreads radially in front view on the front window, and the flow toward the front pillar forms a vortex behind the front pillar. Interference between the vortex and the airflow escaping upward is one of the causes of the generation of wind noise.

[0003] Conventionally, an automobile door mirror for reducing such wind noise has been known.
No. 5542.

As shown in FIG. 7, in a vehicle door mirror 70, a driving unit 74 is driven by a control unit 72, and a mirror body 76 is moved between a position indicated by a solid line and a position indicated by a two-dot chain line in FIG. The mirror body 76 is moved to a predetermined position corresponding to the vehicle speed during this time, and the mirror body 76 is separated from the base 80 attached to the door 78, thereby reducing wind noise.

[0005]

However, in this vehicle door mirror 70, as shown by a solid line in FIG. 7, when the distance between the mirror body 76 and the base 80 is widened, the mirror body 76 extends from the vehicle body. There is a problem that the output amount L becomes large.

The present invention has been made in view of the above circumstances, and has as its object to provide an automobile door mirror capable of reducing wind noise without increasing the overhang of the door mirror.

[0007]

According to a first aspect of the present invention, there is provided an arm portion serving as an attachment portion to a vehicle body, and a mirror body having a mirror body and attached to the vehicle body via the arm portion. In the vehicle door mirror provided, a ventilation hole communicating with the inside of the mirror body and forming a flow path passing through the inside of the mirror body is provided on a side surface of the mirror body facing the vehicle body.

Therefore, when the vehicle is running, a part of the airflow flowing between the vehicle body and the mirror body flows into the ventilation hole provided on the side surface of the mirror body facing the vehicle body, and passes through the flow path passing through the mirror body. Flows. Therefore, the airflow flowing between the vehicle body and the mirror body and escaping upward is reduced. As a result, interference between the airflow and a vortex generated behind the front pillar is reduced, and wind noise is reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an automobile door mirror according to the present invention will be described with reference to FIGS.

In the drawings, an arrow FR indicates a forward direction of the vehicle, an arrow IN indicates an inward direction of the vehicle width, and an arrow UP indicates an upward direction of the vehicle.

As shown in FIG. 5, a door mirror 12 is mounted on the front side door 10 of the vehicle body of the present embodiment, and the door mirror 12 is a rear closed door mirror.

As shown in FIG. 4, the door mirror 12 is
Arm 14 to be attached to vehicle body (front side door)
And a mirror body 16 attached to the vehicle body via the arm 14. A vertically long rectangular ventilation hole 18 communicating with the inside of the mirror body 16 is formed at a front portion of a side surface 16A of the mirror body 16 facing the vehicle body, and a cover 20 is provided in the ventilation hole 18. ing.

The cover 20 is formed in a mesh or honeycomb shape to prevent foreign substances from entering the inside of the mirror body and to reduce noise generation due to turbulence in the air flow near the ventilation hole 18. The mesh or honeycomb-shaped pitch is set so that the airflow passes smoothly and does not deteriorate the inflow resistance of the airflow.

As shown in FIG. 3, a mirror body 22 is provided in the internal space of the mirror body 16. The mirror body 22 is disposed substantially at the center of an opening 16B formed on the rear side of the mirror body 16, and a cover 24 is attached to the rear surface 22A of the mirror body 22. The cover 24 is provided to protect internal devices (not shown) such as a motor for rotating a mirror disposed in the cover 24 from water or the like, and to improve the flow of airflow. Of the mirror body 16 to form a flow passage 26 for blowing air.

Further, as shown in FIGS. 2 and 3, near the opening 16B of the mirror body 16, the inner peripheral edge 16D of the mirror body 16 and the outer peripheral edge 24A of the cover 24 are provided.
Are optimized so that the airflow (arrow S2 in FIG. 3) flows out smoothly, and the separation area generated behind the door mirror 12 is reduced. In this respect, the wind noise of the door mirror 12 is also reduced. It can be reduced.

As shown in FIG. 2, the cover 24 is erected by a leg 25 on a lower wall 16E of the mirror body 16, and the lower wall 16E has the cover 24 and the ventilation hole 1a.
8, a guide plate 28 is provided upright. This guide plate 2
Reference numeral 8 denotes a circular arc shape bulging toward the ventilation hole 18 in a plan view. And a branch (arrow S2 in FIG. 2) passing through another area of the flow path 26, the resistance can be reduced and reduced.

Therefore, as shown in FIG. 1, when the vehicle is running, the airflow flowing between the vehicle body and the mirror body 16 (FIG. 1)
1 (arrows S1 and S2 in FIG. 1) enter the mirror body 16 through the ventilation holes 18 of the mirror body 16 and pass through the flow path 26.

Next, the operation of the embodiment will be described. As shown in FIG. 5, part of the airflow S4 flowing between the vehicle body and the mirror body 16 is such that the mirror body 16 is a rear-closed door mirror, and the flow path between the vehicle body and the mirror body 16 is tapered. Escape upward because it has become. On the other hand, the air received by the front window 30 due to the running of the vehicle becomes a flow that spreads radially on the front window 30 when viewed from the front. The flow toward the front pillar 32 (arrow S5 in FIG. 5) forms a vortex S6 behind the front pillar 32. The vortex S6, the vehicle body and the mirror body 1
6 and the airflow S4 flowing upward and escaping upward interferes with each other to generate wind noise.

For this reason, in the vehicle door mirror 10 of this embodiment, as shown in FIG. 1, a ventilation hole 18 is formed in the front part of the side surface 16A of the mirror body 16 facing the vehicle body. As a result, a part of the airflow (arrow S in FIG. 1) (arrow S in FIG. 1) flowing between the vehicle body and the mirror body 16 during running of the vehicle.
1, S2) enters the mirror body 16 through the ventilation hole 18 of the mirror body 16, and the inner peripheral surface 16 of the mirror body 16
It passes through the inside of the air flow passage 26 formed between C and the cover 24.

Accordingly, the airflow flowing between the vehicle body and the mirror body 16 (arrow S3 in FIG. 1) decreases, and the airflow S4 escaping upward (see FIG. 5) also decreases. Further, a part of the airflow (arrow S2 in FIG. 1) is guided outward in the vehicle width direction. Therefore, wind noise generated by interference with the vortex behind the front pillar 32 can be reduced.

As described above, in the present embodiment, the mirror body 1
6, a ventilation hole 18 communicating with the inside of the mirror body 16 is formed in a side surface 16A facing the vehicle body, and a part of the airflow flowing between the vehicle body and the mirror body 16 is partially transferred to the inner peripheral surface 16C of the mirror body 16 and the cover 24. By reducing the airflow flowing between the vehicle body and the mirror body 16 by reducing the airflow flowing between the vehicle body and the mirror body 16 by reducing the airflow flowing through the airflow passage 26 formed between the front pillar 32 and the 7, the wind noise can be reduced without increasing the overhang of the door mirror as in the prior art shown in FIG.

Further, the vehicle door mirror 1 according to the present embodiment.
0, as shown in FIGS. 2 and 3, the mirror body 1
In the vicinity of the opening 16B of FIG. 6, the respective shapes of the inner peripheral edge 16D of the mirror body 16 and the outer peripheral edge 24A of the cover 24 are optimized so that the air flows smoothly, and is shown in FIG. As shown in FIG.
6, S7) flows along the mirror surface 22B of the mirror body 22. For this reason, the peeling area generated behind the door mirror 12 can be reduced, and the wind noise generated behind the door mirror 12 can also be reduced.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to such an embodiment, and various other embodiments are within the scope of the present invention. It is clear to a person skilled in the art that is possible.

For example, the shape of the ventilation hole 18 is not limited to the vertically long rectangular shape shown in the present embodiment, but may be any other shape such as a circle or an ellipse. Also, the position of the ventilation hole 18
The mirror body 16 according to the present embodiment is not limited to the front portion of the side surface 16A facing the vehicle body, but may be formed near the center in the front-rear direction of the side surface 16A. Further, in the present embodiment, the air flow passage 26 is formed in the entire area between the cover 24 and the inner peripheral surface 16C of the mirror body 16, but instead, the cover 24 and the inner peripheral surface 16C of the mirror body 16 are replaced. , For example, an area 26A on the vehicle body side of the flow path 26 is closed.
A configuration may be adopted in which a flow path for air blowing is formed only in an area other than A. Further, in the present embodiment, the guide plate 28 is provided, but instead of the guide plate 28,
8 into a main flow (arrow S1 in FIG. 2) passing through a region 26A on the vehicle body side of the flow path 26 and a tributary flow (arrow S2 in FIG. 2) passing through another region of the flow path 26. A configuration in which the resistance is reduced and dispersed may be adopted.

[0025]

According to a first aspect of the present invention, there is provided an automobile door mirror including an arm serving as a mounting portion to a vehicle body, and a mirror body having a mirror body and mounted to the vehicle body via the arm. The side surface of the mirror body facing the vehicle body is provided with ventilation holes that communicate with the inside of the mirror body and form a flow path that passes through the inside of the mirror body, so that the wind noise can be reduced without increasing the overhang of the door mirror. Has an excellent effect that can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an automobile door mirror according to an embodiment of the present invention.

FIG. 2 is a plan sectional view showing an automobile door mirror according to an embodiment of the present invention.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a perspective view showing the automobile door mirror according to the embodiment of the present invention, as viewed from the front inside of the vehicle.

FIG. 5 is a perspective view showing a part of a vehicle body to which the automobile door mirror according to the embodiment of the present invention is applied, as viewed from outside the front of the vehicle.

FIG. 6 is a schematic plan view showing an airflow of an automobile door mirror according to an embodiment of the present invention.

FIG. 7 is a schematic plan view showing a vehicle door mirror according to a conventional embodiment.

[Description of Signs] 10 Front side door 12 Door mirror 14 Arm 16 Mirror body 16A Side face of mirror body facing the body 18 Ventilation hole 22 Mirror main body 26 Ventilation passage

Claims (1)

[Claims] 1. An automobile door mirror comprising: an arm serving as an attachment portion to a vehicle body; and a mirror body having a mirror body and attached to the vehicle body via the arm, wherein the mirror body facing the vehicle body is provided. A door mirror for an automobile, wherein a ventilation hole is provided in a side surface portion of the mirror body so as to communicate with the inside of the mirror body and form a flow path passing through the inside of the mirror body.