JP2014148241A - Rear under mirror of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear under mirror of a vehicle, which can properly restrain a rear part of a vehicle body from seeming to be in a greatly curved state and which can be prevented from providing a user with a feeling of strangeness.SOLUTION: A rear under mirror A of a vehicle has a mirror finished surface 3 that is a convex surface in a horizontal width direction and a concave surface in a vertical height direction. The mirror finished surface 3 assumes a shape that gradually decreases a curvature radius of the concave surface toward both horizontal-width-direction ends from a horizontal-width-direction central part.

Description

  The present invention relates to a rear under mirror of a vehicle that is disposed above or above a rear window of a vehicle and used for visually recognizing a lower rear periphery of the vehicle.

As an example of a rear under mirror of a vehicle, there is one in which a mirror surface for projecting a lower rear periphery of the vehicle is convex in the left-right width direction and concave in the vertical height direction (see, for example, Patent Document 1). .
According to such a configuration, since the mirror surface is convex in the left-right width direction, a wide range in the vehicle width direction can be reflected on the mirror surface. On the other hand, since the mirror surface is concave in the vertical height direction, the mirror image can be an upright image and visibility can be improved.

However, in the prior art, there is room for improvement as follows.
That is, FIG. 6 shows an example in which an image Ib (cross-hatched portion) of the rear part of the vehicle body such as a rear bumper is projected in a region near the lower part of the mirror surface 3E. Conventionally, the image reflected in the lower region of the mirror surface 3E appears to be in a state in which the central side portion in the left-right width direction is displaced considerably above the both end sides (the details will be described later in the present invention). (See explanation of relative to). For this reason, although the outer shape of the rear part of the vehicle body is actually close to a straight shape, the image Ib of the rear part of the vehicle body is a greatly curved image. However, when the rear part of the vehicle body appears to be greatly curved as described above, the user feels uncomfortable.

International publication WO2011 / 136206

  The present invention has been conceived under the circumstances as described above, and is a vehicle capable of appropriately preventing the rear part of the vehicle body from appearing to be largely curved and preventing the user from feeling uncomfortable. The challenge is to provide a rear under mirror.

  In order to solve the above problems, the present invention takes the following technical means.

  A rear under mirror for a vehicle provided by the present invention is a rear under mirror for a vehicle having a convex mirror surface in the left-right width direction and a concave mirror surface in the vertical height direction. It is characterized in that the radius of curvature of the concave surface gradually decreases from the central portion in the left-right width direction toward both ends.

  According to such a configuration, as will be understood from the embodiment described later, the image reflected in the lower region of the mirror surface is greatly displaced in the vertical direction between the center side and both end sides in the left-right width direction. It is possible to prevent the rear part of the vehicle body from appearing in a greatly curved state. As a result, it is possible to prevent the user from feeling uncomfortable.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

It is a schematic explanatory drawing which shows an example of the rear under mirror of the vehicle which concerns on this invention. It is action | operation explanatory drawing of the rear under mirror shown in FIG. 1 shows a mirror surface of the rear undermirror shown in FIG. 1, wherein (a) is a sectional view taken along line IIIa-IIIa in (b), (b) is a front view, and (c) is a sectional view taken along IIIc- in (b). It is IIIc sectional drawing, (d) is the IIId-IIId sectional view of (b). It is explanatory drawing of the shape of the mirror surface of the rear under mirror shown in FIG. It is a schematic front view which shows typically an example of the image reflected on the mirror surface of the rear under mirror shown in FIG. It is a schematic front view which shows typically an example of the image reflected on the mirror surface of the conventional rear under mirror.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  A rear under mirror A of the vehicle shown in FIG. 1 is used for visually recognizing the lower rear periphery of the vehicle 1 and is attached to the upper or upper portion of the rear window of the vehicle 1 using a bracket 2. Preferably, the rear under mirror A is disposed at a substantially central position in the vehicle width direction in the vehicle interior. In the case where the vehicle-mounted high-mount stop lamp is attached to the vehicle 1, it is disposed on the front side of the housing so as not to impair the visibility of the stop lamp from the outside.

  The rear under mirror A has a mirror surface 3. As shown in FIG. 3B, the mirror surface 3 has a substantially rectangular shape in which the left and right side edges are arc-shaped. Further, as shown in FIG. 3A, the mirror surface 3 is a convex surface having an appropriate curvature radius Ra in the left-right width direction. In FIG. 3 (excluding FIG. 3B), the mirror surface 3 is schematically shown by only one line, but in reality, the rear under mirror A is used for forming the mirror surface 3. It has a base (not shown). The curvature radius Ra described above is slightly larger on the upper side and the lower side than the central part of the mirror surface 3 in the vertical height direction. However, the present invention is not limited to this, and the curvature radii Ra at various locations in the vertical height direction of the mirror surface 3 may be the same.

  As shown in FIGS. 3C and 3D, the mirror surface 3 is concave in the vertical height direction. However, the radius of curvature Rb of the concave surface is not the same everywhere, and gradually decreases from the center portion in the left-right width direction of the mirror surface 3 toward both ends thereof. Therefore, the radii of curvature Rb1 and Rb2 shown in FIGS. 3C and 3D respectively have a relationship of Rb1> Rb2.

  The solid SB shown in FIG. 4 is a solid rod or curved tube having a circular cross section that is curved in an arc shape, and the diameter gradually decreases as the distance from a predetermined center position increases. The mirror surface 3 is the same as a part of the surface F of the solid SB.

As shown in FIG. 1, the rear under mirror A of the vehicle is set and used so that the ground behind the vehicle 1 and a part of the rear part of the vehicle 1 are reflected on the mirror surface 3 and can be visually recognized by the user.
The operation at that time will be described below with reference to FIG.

  FIG. 2 shows a state in which the contour L at the rear end of the rear bumper 10 of the vehicle 1 shown in FIG. The contour line L is assumed to be a straight line extending in the vehicle width direction of the vehicle 1. In FIG. 2, a total of three sections S1 to S3 of the mirror surface 3 are indicated by solid lines. These sections S1 to S3 are positions indicated by phantom lines in FIG. 3B, and sections S1 and S3 are the portions shown in FIGS. 3C and 3D. Section S2 is located approximately at the center between sections S1 and S3.

  FIG. 2 also shows the sections Sa to Sc of the conventional mirror surface 3E shown in FIG. The proportional mirror surface 3E is a convex surface in the left-right width direction and a concave mirror surface in the vertical height direction, but the curvature radius of the concave surface is constant, which is different from the mirror surface 3 of the present embodiment. To do. The section Sa is a central portion in the left-right width direction of the mirror surface 3E, and the radius of curvature and the position thereof are matched with the section S1 of the mirror surface 3 of the present embodiment. The positions in the horizontal width direction of the sections Sb and Sc on the mirror surface 3E correspond to the sections S1 and S2 of the mirror surface 3 of this embodiment.

  First, in contrast, rays Ra to Rc from the contour line L of the rear bumper 10 reach the user's eyes after being reflected at the respective positions Pa to Pc of the sections Sa to Sc. Here, the positions Pb and Pc are lower than the position Pa, and the height difference H1 between the positions Pa and Pc is considerably large. Therefore, the mirror image of the contour line L is a line that is greatly curved so that the central portion in the left and right lateral width direction protrudes upward from both end sides. Due to such a principle, as shown in FIG. 6, the image Ib of the rear part of the vehicle body becomes a greatly curved image.

  On the other hand, in this embodiment, the light rays R1 to R3 (the light rays R1 and Ra are the same) from the contour line L of the rear bumper 10 are the positions P1 to P3 (the positions P1 and Pa are the same) of the sections S1 to S3. ) Before reaching the user's eyes. Although the positions P2 and P3 are slightly higher than the position P1, the height difference H2 between the positions P1 and P3 is considerably small. For this reason, the mirror image of the contour line L is a straight line with almost no curvature. In the present embodiment, as shown in FIG. 5, the image Ia of the rear part of the vehicle body (rear bumper 10) on the mirror surface 3 is not greatly curved. As a result, it is possible to prevent the user from feeling uncomfortable, and the visibility is also improved.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the rear under mirror of the vehicle according to the present invention can be variously modified within the range intended by the present invention.

  In the present invention, the specific curvature radius of each part of the mirror surface is not limited. In the present invention, the radius of curvature of the concave surface gradually decreases from the central portion of the mirror surface in the left-right width direction, but the degree of change in the radius of curvature of the concave surface is not limited. The vertical and horizontal sizes of the mirror surface and the overall shape are not limited. For example, other shapes such as a trapezoidal shape can be used. The rear under mirror of the vehicle according to the present invention only needs to have a mirror surface having a configuration intended by the present invention, and a specific material, a method of attaching to the vehicle, and the like are not limited.

A Vehicle rear under mirror 3 Mirror surface

Claims (1)

A rear under mirror for a vehicle that is convex in the left-right width direction and has a concave mirror surface in the vertical height direction,
The vehicle rear mirror according to claim 1, wherein the mirror surface has a shape in which the radius of curvature of the concave surface gradually decreases as it goes from the central portion in the left-right width direction to both ends.

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