JP2012101607A - Front side direction visual recognition device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front side direction visual recognition device in which the visibility is improved by improving the dead area or the distortion of an image and the shape of a door mirror housing is considered.SOLUTION: The front side direction visual recognition device 11 is provide with: the door mirror housing 42; a door mirror body; a first reflection mirror 16 reflecting a front required area of the vehicle 12 from the lower side of the door mirror body; and a second reflection mirror 21 reflecting the light of the first reflection mirror 16 toward an occupant of the vehicle 12. The first reflection mirror 16 comprises: a constant curvature mirror surface 54 having a constant curvature of a curved surface; and a free curvature mirror surface 55 formed into a free curved surface in which the curvature of at least one section of the curvature of a longitudinal section and the curvature of a cross section is not constant. A boundary mirror surface section 56 between the constant curvature mirror surface 54 and the free curvature mirror surface 55 is tilted (tilt angle α) so that the upper end 58 is closer by a distance W m to a cabin 17 side of the vehicle 12 than the lower end 61.

Description

  The present invention relates to a front side visual recognition device for confirming a left front wheel side of a vehicle that becomes a blind spot of a driver with a mirror.

Some of the front side visual recognition devices have an external mirror facing the front of the vehicle so that they can be seen by the internal mirror in the vehicle interior.
In this apparatus, an outer mirror is provided as a convex mirror in a door mirror housing, and reflected light from the outer mirror is directed to the driver by the inner mirror. The driver can confirm the vicinity of the left front wheel (see, for example, Patent Document 1).

However, in the prior art (Patent Document 1), the distortion of the image of the inner mirror increases depending on the object.
In addition, the door mirror housing is designed to reduce air resistance, while the outer mirror and the inner mirror are designed to have a small blind spot. It has been desired to improve the range of blind spots and image distortion and to consider the shape of the door mirror housing.

JP 2009-173246 A

  It is an object of the present invention to provide a front side visual recognition device that improves visibility by improving the range of blind spots and image distortion, and considering the shape of the door mirror housing.

  In order to solve the above problems, an invention according to claim 1 is directed to a door mirror housing attached to a vehicle body side portion of a vehicle, a door mirror main body housed and held in the door mirror housing, a lower part of the door mirror main body, and a vehicle A front-side visual recognition device comprising: a first reflecting mirror that reflects the side and the front of the vehicle; and a second reflecting mirror that reflects light from the first reflecting mirror toward an occupant seated in the vehicle. The first reflecting mirror is formed in a convex curved surface that is convex forward of the vehicle. The convex curved surface shows the curvature of the surface of the vertical curved surface in the vehicle side view and longitudinal section, and the vehicle planar view and transverse In the surface, the curvature of the surface of the horizontal curved surface shall be indicated, and a constant curvature mirror surface with a constant curvature of the longitudinal section and the transverse section, and a curvature of the longitudinal section and a curvature of the transverse section connected to the constant curvature mirror surface, at least The curvature of one section is not constant Is formed on the free-form surface and the free curvature mirror consists, free curvature mirror is a vehicle width direction, characterized in that it is arranged on the outside of the vehicle than the constant curvature mirror.

  The invention according to claim 2 has a boundary mirror surface portion between the constant curvature mirror surface and the free curvature mirror surface, and the boundary mirror surface portion is inclined so that the upper end is located closer to the vehicle compartment side than the lower end. It is characterized by.

  The invention according to claim 3 is characterized in that the constant curvature mirror surface is formed in a trapezoidal shape in which the lower constant curvature lower edge on the vehicle lower side is longer than the upper constant curvature upper edge on the vehicle upper side.

  In the invention according to claim 4, the constant curvature mirror surface has an inner edge that connects one end of the upper edge of the constant curvature and the lower edge of the constant curvature, and a boundary mirror surface portion that connects the other ends, and the boundary mirror surface portion is vertical. The inner edge is formed at a second angle smaller than the first angle, and the inner edge is formed at a desired first angle.

  The invention according to claim 5 is characterized in that the first reflecting mirror is disposed on the front surface of the door mirror housing, and the constant curvature mirror surface forms an inner edge along a vertical line when viewed from the front of the vehicle.

  The invention according to claim 6 is characterized in that, in the first reflecting mirror, the boundary mirror surface portion is formed with the maximum curvature among the curvatures of the vehicle in a plan view and a cross section.

  In the invention according to claim 7, the free-curvature mirror surface is formed in a trapezoidal shape in which the free curvature lower edge on the vehicle lower side is shorter than the free curvature upper edge on the vehicle upper side when viewed from the front of the vehicle. The curvature is smoothly reduced from the curvature of the lower edge toward the curvature of the upper edge of the free curvature.

  In the invention which concerns on Claim 1, It is a front side visual recognition apparatus provided with the door mirror housing, the door mirror main body, the 1st reflective mirror, and the 2nd reflective mirror, Comprising: A 1st reflective mirror is a longitudinal cross-section. And a constant curvature mirror surface with a constant curvature of the cross section and a free curved surface that is connected to the constant curvature mirror surface and is a free curved surface in which the curvature of at least one of the cross section lines is not constant among the curvature of the longitudinal section and the curvature of the cross section Since the free-curvature mirror surface is arranged outside the vehicle in the vehicle width direction from the constant-curvature mirror surface, the constant-curvature mirror surface near the vehicle is located near the vehicle (front body side). The image is projected by reflecting the light of the image of the portion near the side) to the second reflecting mirror as an image with small distortion. Therefore, visibility is improved.

  On the other hand, by making the outside of the vehicle a free-curvature mirror surface from the constant-curvature mirror surface, it can be formed into a mirror surface shape taking into account the shape (design and air resistance) of the door mirror housing.

In the invention which concerns on Claim 2, it has a boundary mirror surface part between a constant curvature mirror surface and a free curvature mirror surface, and since a boundary mirror surface part inclines so that an upper end may be located in the vehicle compartment side rather than a lower end, On the second reflecting mirror facing the occupant, an image is reflected at a perspective distance by a constant curvature mirror surface as in perspective, and the boundary mirror surface portion is projected substantially in a straight line toward the vanishing point (center of perspective).
That is, the boundary mirror surface portion is arranged on the second reflecting mirror along or overlapping with a line parallel to the vehicle or a long object, and the line or the long object is removed from the vanishing point (perspective method). It can be projected to head toward the center.
As a result, a range from the boundary mirror surface portion (for example, line) to the vehicle in the image and a desired range in front of the vehicle can be projected as a small distortion image by the constant curvature mirror surface.

  In the invention according to claim 3, since the constant curvature mirror surface is formed in a trapezoidal shape having a lower constant curvature lower edge than an upper constant curvature edge, a line parallel to the vehicle reflected toward the vanishing point or a long object is formed. The boundary of the constant curvature mirror surface can be provided along the inclination of. As a result, it is possible to project a range in the vicinity of the vehicle body side part from the vehicle body side part reflected on the mirror surface of the constant curvature to a predetermined distance and a desired range in front of the vehicle as an image with small distortion.

  In the invention according to claim 4, the constant curvature mirror surface has an inner edge that connects one end of the upper edge of the constant curvature and the lower edge of the constant curvature, and a boundary mirror surface portion that connects the other ends, and the boundary mirror surface portion is vertical. Since the inner edge is formed at a second angle smaller than the first angle, the first reflector is arranged at a desired distance further away from the vehicle. Even in this case, the inner edge and the boundary mirror surface portion of the constant curvature mirror surface can be arranged with an inclination substantially coincident with the inclination of the line appearing in a straight line toward the vanishing point (relative to the vertical line). As a result, in the image, the range in the vicinity of the vehicle body side that is up to a predetermined distance (for example, in plan view, to the line) from the vehicle body side that is reflected on the constant curvature mirror surface, and the desired range in front of the vehicle is low in distortion. It can be projected as an image.

In the invention according to claim 5, the first reflecting mirror is disposed on the front surface of the door mirror housing, and the constant curvature mirror surface forms the inner edge along the vertical line when viewed from the front of the vehicle.
The contour of a part of the vehicle reflected on the constant curvature mirror surface and the second reflecting mirror becomes a smooth curve along the vertical line, and the inner edge can be along the projected contour. In particular, an image in the vicinity of the vehicle can be visually recognized with an image having a small distortion up to a desired range in front of the vehicle, and visibility is improved.

In the invention according to claim 6, since the first reflecting mirror is formed with the maximum curvature of the boundary mirror surface portion of the curvature of the cross section,
Whether the image reflected on the second reflecting mirror is greatly distorted by the reflected light from the boundary mirror surface, and when the driver views the second reflecting mirror, whether the image is reflected on the constant curvature mirror surface or the free curvature mirror surface. It becomes easy to distinguish.
That is, there is an advantage that the distance from the greatly distorted image to the vehicle can be easily grasped.

  In the invention according to claim 7, the free-curvature mirror surface is formed in a trapezoidal shape in which the free curvature lower edge on the vehicle lower side is shorter than the free curvature upper edge on the vehicle upper side when viewed from the front of the vehicle. Since the curvature is smoothly reduced from the curvature of the lower edge toward the curvature of the free curvature upper edge, it is possible to form a curved surface in consideration of the shape of the door mirror housing.

If the curvature of the upper edge of the free curvature is large (the radius (the radius of curvature is small)) due to the trapezoidal shape of the upper edge of the free curvature, the outer edge on the opposite side of the boundary mirror surface becomes a curved surface that moves to the rear of the vehicle. The housing shape becomes complicated.
That is, the outer ends on the opposite side of the boundary mirror surface portion are substantially at the same position vertically.
Accordingly, the first reflecting mirror can be disposed on the door mirror housing while maintaining the shape of the door mirror housing in consideration of conditions such as air resistance.

It is a perspective view of the front side visual recognition device concerning Example 1 of the present invention. It is a front view of the door mirror of the front side visual recognition apparatus concerning Example 1. FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is a figure explaining the mechanism which projects the front side of a front side visual recognition device. FIG. 8 is a detailed view taken along arrow 8 in FIG. 7. It is a figure explaining the front side visual recognition apparatus which concerns on Example 2 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail in Example 1 and Example 2.

As shown in FIGS. 1 and 8, the front side visual recognition device 11 according to the first embodiment reflects the lower left front of the vehicle 12 and the vicinity of the left front wheel 13.
As shown in FIGS. 1 and 8, the device 11 is provided with a first reflecting mirror 16 in a door mirror 15, a second reflecting mirror 21 in a vehicle compartment 17, and a left front wheel 13 on the second reflecting mirror 21. The one in the nearby blind spot is shown (Fig. 8).

  The vehicle 12 supports a front body 25 shown in FIGS. 1, 2, 7, a passenger compartment 17, a passenger seat 26, a driver seat 27, a left front door 28, a front glass 31, and left and right ends of the front glass 31. The pillar 32, the sub pillar 33 connected to the front pillar 32 and extending downward, the sub window glass 34 supported by the sub pillar 33 and the front pillar 32, the front side visual recognition device 11, and the door mirror 15 provided on the left front door 28. Is provided.

  The door mirror 15 is disposed outside the vehicle compartment 17 and has a support portion 38 attached to the front upper portion 36 of the left front door 28, a door mirror main body 41 that reflects light and projects a rear image (in the direction of arrow a2), and a door mirror. A door mirror housing 42 that supports the main body 41 and a direction indicator lamp 43 are provided.

The support part 38 supports the door mirror housing 42 so that it can be folded.
2 to 4, the door mirror housing 42 is made of a resin, is formed in a box shape, and faces the front side 45 of the vehicle 12 (in the direction of the arrow a <b> 3), and an inner side portion 46 that continues to the front side portion 45. The outer portion 47 and the top portion 48. The first reflecting mirror 16 is formed integrally with the lower portion 51 of the front side portion 45. Th is the thickness of the door mirror 15 and the door mirror housing 42.

The first reflecting mirror 16 is a convex mirror, and the radius of the convex surface (the radius of curvature) and the direction of the convex surface are the left front side of the vehicle 12 (where the first object and the second object in FIG. 8 are placed). It is set to be reflected on the second reflecting mirror 21.
The second reflecting mirror 21 is a plane mirror.

Next, a main configuration of the front side visual recognition device 11 according to the first embodiment will be described with reference to FIGS.
The front side visual recognition device 11 includes a door mirror housing 42 attached to a vehicle body side portion (the left front door 28) of the vehicle 12, a door mirror main body 41 stored and held in the door mirror housing 42, and a vehicle 12 side from below the door mirror main body 41. In the direction of the arrow a1 and the front of the vehicle 12 (the direction of the arrow a1), and the second reflection that reflects the light from the first reflector 16 toward the vehicle 12 passengers. And a mirror 21.

The “vehicle body side portion” is from the rear end of the left front door 28 to the front end of the front body 25 (for example, near the headlamp).
Specifically, the “side of the vehicle 12” is a range from the Y1 line 81 to the Y3 line 83 in FIG.
Specifically, “in front of the vehicle 12” is a range from the first object 85 and the X1 line 76 to the third object 87 in FIG.

The first reflecting mirror 16 is formed in a convex curved surface that is convex forward of the vehicle 12.
The convex curved surface shows the curvature of the surface of the vertical curved surface (referred to as a longitudinal sectional line) in the longitudinal section of the vehicle 12 as viewed from the side (viewed in FIG. 4). In the cross section, the curvature of the surface of the horizontal curved surface (referred to as a cross section line) is shown.

The first reflecting mirror 16 has a constant curvature mirror surface in which the curvature (reciprocal of the curvature radius rm1) of the longitudinal section line (vertical curved surface) 51 and the transverse section lines (horizontal curved surface) 52, 53 is constant. 54 and a free curved surface in which the curvature of at least one of the cross section lines is not constant among the curvature of the longitudinal section line (substantially the same as the longitudinal section line 51) and the curvature of the transverse section lines 52 and 53. The free-curvature mirror surface 55 is formed.
Here, the free curvature mirror surface 55 is formed as a free curved surface in which the curvatures of the cross sectional lines 52 and 53 are not constant.

  The constant curvature mirror surface 54 is disposed on the vehicle 12 side, and the free curvature mirror surface 55 is disposed outside the vehicle 12 with respect to the constant curvature mirror surface 54.

  The boundary mirror surface portion 56 between the constant curvature mirror surface 54 and the free curvature mirror surface 55 is inclined such that the upper end 58 of the boundary mirror surface portion 56 is closer to the compartment 17 side of the vehicle 12 than the lower end 61 of the boundary mirror surface portion 56 by the distance Wm. It is inclined (inclination angle α).

  In addition, the constant curvature mirror surface 54 is formed in a trapezoidal shape in which the constant curvature lower edge 64 on the lower side of the vehicle 12 is longer than the upper edge 63 of the constant curvature on the upper side of the vehicle 12 when viewed from the front of the vehicle 12 (viewpoint in FIG. 2). .

  Furthermore, the constant curvature mirror surface 54 has one end of the constant curvature upper edge 63 and one end of the constant curvature lower edge 64, an inner edge 66 close to the vehicle 12, and a boundary mirror surface portion 56 connecting the other ends. The boundary mirror surface portion 56 was formed at a desired first angle (inclination angle α) with respect to the vertical.

  The constant curvature mirror surface 54 is connected to the upper edge 63 of the constant curvature and the lower edge 64 of the constant curvature so as to face the vehicle 12 and close to the vehicle 12, and the boundary mirror surface portion 56 facing the inner edge 66 and facing the outside of the vehicle 12. The boundary mirror surface portion 56 is formed at a desired first angle (inclination angle α) with respect to the vertical, and the inner edge 66 is formed at a second angle (inclination angle δ) smaller than the first angle. is doing.

  Although the inner edge 66 is formed at the inclination angle δ, the inner edge 66 of the first embodiment may be formed vertically without being inclined.

  The first reflecting mirror 16 is disposed on the front surface of the door mirror housing 42, and the constant curvature mirror surface 54 forms an inner edge 66 along the vertical line when the vehicle 12 is viewed from the front.

  Further, in the first reflecting mirror 16, the boundary mirror surface portion 56 is formed with the maximum curvature (reciprocal of the curvature radius rb) among the curvatures of the vehicle 12 in plan view and the cross sectional lines 52 and 53.

The free curvature mirror surface 55 is a front view of the vehicle 12,

A free curvature lower edge 71 on the vehicle lower side is formed in a trapezoidal shape lower than the free curvature upper edge 68 on the vehicle upper side, and the curvature of the free curvature lower edge 71 in a plan view of the vehicle 12 (viewpoints in FIGS. 5 and 6). The curvature is smoothly reduced (the radius of curvature is smoothly increased) from the (reciprocal of the radius of curvature rm3) toward the curvature of the free curvature upper edge 68 (the inverse of the curvature radius rm2).

Next, the front side visual recognition device 11 will be described in detail.
In the front side visual recognition device 11, the convex first reflecting mirror 16 is provided on the front side portion 45 of the door mirror housing 42 described above.

The front side portion 45 of the door mirror housing 42 is a free-form surface as shown in FIGS. The free-form cross-sectional line of the free-form surface smoothly continues a curve having a mean curvature radius rh1 to rh4 in plan view (FIG. 3).
Further, the longitudinal section line of this free-form surface smoothly and smoothly continues curves of the vehicle 12 as viewed from the side (FIG. 4) and average curvature radii rh6 to rh8.
Note that the curvature of the free-form surface of the front side portion 45 is the reciprocal of the curvature radii rh1 to rh4 and rh6 to rh8.

  The first reflecting mirror 16 is a convex mirror in which the constant curvature mirror surface 54, the boundary mirror surface portion 56, and the free curvature mirror surface 55 described above are smoothly connected.

The constant curvature mirror surface 54 is a spherical surface and is formed with a curvature radius (radius) rm1. The boundary mirror surface portion 56 that is the outer edge of the constant curvature mirror surface 54 is set by the range to be projected and the distance Lw of the constant curvature mirror surface 54 from the vehicle 15.
The distance Lw is a distance from the boundary between the left front door 28 and the support portion 38 to the intersection of the constant curvature upper edge 63 and the inner edge 66 of the constant curvature mirror surface 54.

  Further, the outer edge (boundary mirror surface portion 56) of the constant curvature mirror surface 54 is set to have an inclination overlapping the line 74 (FIG. 7) when the second reflecting mirror 21 is viewed as shown in FIG. A line 74 is a line drawn parallel to the vehicle 12 at a distance Ld from the vehicle 12.

  The constant curvature mirror surface 54 changes smoothly within a tolerance (plus or minus) range of the curvature radius rm1, and more specifically, is substantially spherical.

The curvature radius rm1 of the constant curvature mirror surface 54 substantially matches the curvature radii rh1, rh2, and rh8 of the front side portion 45 of the door mirror housing 42.
That is, the curved surface of the constant curvature mirror surface 54 and the curved surface of the front side portion 45 of the door mirror housing 42 are substantially the same curved surface.
The boundary mirror surface portion 56 is continuous with the constant curvature mirror surface 54.

As shown in FIGS. 5 and 6, the boundary mirror surface portion 56 is formed with transverse section lines 52 and 53 with a curvature radius rb. The radius of curvature rb is the smallest radius of curvature of the first reflecting mirror 16.
A free curvature mirror surface 55 is continuous with the boundary mirror surface portion 56.

The free-curvature mirror surface 55 has a vertical cross section line (not shown in the drawing) that substantially matches the door mirror housing 42. Further, it almost coincides with the curved surface of the constant curvature mirror surface 54.
The vertical cross section line of the free curvature mirror surface 55 is a vertical cross section line as shown in FIG. 4 and substantially coincides with the average curvature radii rh7 and rh8 of the front side portion 45 of the door mirror housing. And it is formed with a curved surface that substantially coincides with the curvature radius rm1 of the constant curvature mirror surface 54.

The free-curvature mirror surface 55 has different cross-sectional lines 52 and 53 (FIGS. 5 and 6).
Since the cross section line 52 is close to the free curvature upper edge 68 (FIG. 1), the curve of the cross section line 52 and the curve of the free curvature upper edge 68 are substantially the same curve.
The curve (curved surface) of the free curvature upper edge 68 is a curve (curved surface) formed with a curvature radius rm2, as shown in FIG.

Further, since the cross sectional line 53 is close to the free curvature lower edge 71 (FIG. 1), the curve of the cross sectional line 53 and the curve of the free curvature lower edge 71 are substantially the same curve.
The curve (curved surface) of the free curvature lower edge 71 is a curve (curved surface) formed with a curvature radius rm3 as shown in FIG.

  The curvature radius rm2 of the free curvature upper edge 68 of the free curvature mirror surface 55 is larger than the curvature radius rm3 of the free curvature lower edge 71. In other words, the curvature of the free curvature upper edge 68 is smaller than the curvature of the free curvature lower edge 71.

Next, the operation of the front side visual recognition device 11 according to the first embodiment will be described with reference to FIGS.
As described above, in the front side visual recognition device 11, the curved surface above the free curvature mirror surface 55 is made smaller in curvature (increase the curvature radius) than the lower curved surface, and is made continuous with the free curvature mirror surface 55 so that the constant curvature mirror surface 54 is mounted on the vehicle. 12, the image reflected on the second reflecting mirror 21 (see FIG. 8) is less distorted in the vicinity of the left front wheel 13 of the vehicle 12 due to the constant curvature mirror surface 54.

  Here, FIG. 7 is a plan view of the vehicle 12 in order to test the front side visual recognition device 11, and the line 74, the X1 line 76, the X2 line 77, and the X3 line 78 are parallel to the center line C of the width of the vehicle 12 on the floor. , Y1 line 81, Y2 line 82, and Y3 line 83 are drawn. Then, the first object 85 is placed near the intersection of the X1 line 76 and the Y2 line 82 and on the Y2 line 82, and the second object 86 is placed near the intersection of the X3 line 78 and the Y2 line 82 and on the Y2 line 82. The third object 87 was placed on the Y2 line 82 and in front of the vehicle 12.

  The front side visual recognition device 11 has an advantage that distortion in the range from the line 74 to the vehicle 12, for example, the line 74, the X2 line 77, and the first object 85 is small.

Further, since the image (line 74) reflected on the second reflecting mirror 21 by the reflection of the constant curvature mirror surface 54 is continued by the free curvature mirror surface 55 (for example, the Y3 line 83, the X1 line 76, etc.), the range reflected is widened. .
If there is no free curvature mirror surface 55, the outside of the line 74, for example, the Y3 line 83 is not reflected on the second reflecting mirror 21.

In order to expand to the range where the Y3 line 83 is reflected without adopting the free curvature mirror surface 55, it is necessary to enlarge the constant curvature mirror surface 54 as shown by a two-dot chain line shown in FIGS.
In the front side visual recognition device 11, the constant curvature mirror surface 54 does not come out of the door mirror housing 42 as shown by the two-dot chain line shown in FIGS. 5 and 6, so the thickness Th of the door mirror housing 42 needs to be increased to the thickness th1. There is no.
As a result, the first reflecting mirror 16 can be disposed on the door mirror housing 42 while maintaining the shape of the door mirror housing 42.

Further, as shown in FIG. 8, an image with a small distortion is reflected on the second reflecting mirror 21 at a perspective distance (perspective) by the constant curvature mirror surface 54 and is located on the boundary mirror surface portion 56 (for example, a line) 74) appears almost in a straight line toward the vanishing point 91 (the center of perspective).
“What is located on the boundary mirror surface part 56” is reflected on the second reflecting mirror 21 when the boundary mirror surface part 56 reflects light from the target object.

In other words, the boundary mirror surface portion 56 is provided so as to be along or overlap with a long object (for example, the edge of a curbstone or a drainage groove) at a position of a line 74 parallel to the vehicle 12.
As a result, in the image reflected on the second reflecting mirror 21, a range from the boundary mirror surface portion 56 (for example, the edge of the drainage groove) to the vehicle 12 and a desired range in front of the vehicle 12 (for example, the third target) The place where the object 87 is placed can be projected as a small distortion image by the constant curvature mirror surface 54.

Next, the front side visual recognition device 11B according to the second embodiment will be described with reference to FIG.
FIG. 9 corresponds to FIG. The same components as those in the first embodiment shown in FIGS. 1 to 8 are designated by the same reference numerals and description thereof is omitted.

The front side visual recognition device 11B according to the second embodiment includes a first reflecting mirror 16B.
In the first reflecting mirror 16B, the distance (mirror distance) Lw1 from the first reflecting mirror 16B to the vehicle 12 is larger than Lw in the first embodiment.

The distance Lw1 is a distance from the boundary between the left front door 28 and the support portion 38B to the intersection of the constant curvature upper edge 63 and the inner edge 66 of the constant curvature mirror surface 54.
The support portion 38B is attached at the same position as the support portion 38 (FIG. 1), and extends longer than the support portion 38 to the outside of the vehicle 12.

  In the first reflecting mirror 16B, the boundary mirror surface portion 56 between the constant curvature mirror surface 54 and the free curvature mirror surface 55 has an upper end 58 closer to the vehicle compartment 17 side of the vehicle 12 than the lower end 61 of the boundary mirror surface portion 56 by a distance Wm1. It is inclined (inclination angle α1) with the inclination. The inclination angle α1 is larger than the inclination angle α of the first embodiment.

  The constant curvature mirror surface 54 is connected to the upper edge 63 of the constant curvature and the lower edge 64 of the constant curvature so as to face the vehicle 12 and close to the vehicle 12, and the boundary mirror surface portion 56 facing the inner edge 66 and facing the outside of the vehicle 12. , And the boundary mirror surface portion 56 is formed at a desired first angle (inclination angle α1) with respect to the vertical, and the inner edge 66 is formed at a second angle (inclination angle δ1) smaller than the first angle. is doing.

  Further, the upper end 102 of the inner edge 66 is inclined from the lower end 101 of the inner edge 66 facing and close to the vehicle 12 by a distance Wm2 toward the vehicle compartment 17 side of the vehicle 12 (inclination angle δ1).

  The front side visual recognition device 11B according to the second embodiment exhibits the same functions and effects as the front side visual recognition device 11 according to the first embodiment.

Further, in the front side visual recognition device 11B according to the second embodiment, the inner edge 66 and the outer edge of the constant curvature mirror surface 54 even when the first reflecting mirror 16B is disposed at a desired distance Lw1 away from the distance Lw from the vehicle 12. The (boundary mirror surface portion 56) can be arranged with an inclination that substantially matches the inclination (relative to the vertical line) of the line (line 74) that appears in a straight line toward the vanishing point 91.
As a result, even if the first reflecting mirror 16B is further away from the vehicle 12, it can be projected as an image with little distortion.

  The front side visual recognition device of the present invention is suitable for an automobile.

  DESCRIPTION OF SYMBOLS 11 ... Front side visual recognition apparatus, 12 ... Vehicle, 16 ... 1st reflective mirror, 21 ... 2nd reflective mirror, 28 ... Car body side part (left front door), 41 ... Door mirror main body, 42 ... Door mirror housing, 51 ... Longitudinal section Surface of vertical curved surface (vertical cross section line), 52, 53... Surface of horizontal curved surface (cross sectional line) of cross section, 54... Specular curvature mirror surface, 55... Free curvature mirror surface, 56. ... upper end of boundary mirror surface part, 61 ... lower end of boundary mirror surface part, 63 ... upper edge of constant curvature, 64 ... lower edge of constant curvature, 66 ... inner edge of constant curvature mirror surface, 68 ... upper edge of free curvature, 71 ... lower free curvature Edge, rb ... radius of curvature of boundary mirror surface, rm1 ... radius of curvature of constant curvature mirror surface, α, α1 ... first angle (inclination angle) of boundary mirror surface portion, δ, δ1 ... second angle of inner edge (inclination) Corner).

Claims (7)

A door mirror housing attached to a vehicle body side portion of a vehicle, a door mirror main body housed and held in the door mirror housing, a first reflecting mirror below the door mirror main body and on the side of the vehicle and the front of the vehicle And a second reflecting mirror that reflects the light of the first reflecting mirror toward an occupant seated in the vehicle,
The first reflecting mirror is formed in a convex curved surface that is convex forward of the vehicle,
The convex curved surface indicates the curvature of the surface of the vertical curved surface in the vehicle side view and the longitudinal section, and indicates the curvature of the surface of the horizontal curved surface in the vehicle plan view and the transverse section,
A constant curvature mirror surface with a constant curvature of the longitudinal section and the transverse section, and a free curved surface that is continuous with the constant curvature mirror surface and has a curvature of at least one of the curvature of the longitudinal section and the curvature of the transverse section. A free-curvature mirror surface,
The front-side visual recognition device, wherein the free-curvature mirror surface is disposed outside the vehicle in the vehicle width direction from the constant-curvature mirror surface. A boundary mirror surface portion between the constant curvature mirror surface and the free curvature mirror surface;
The front side visual recognition device according to claim 1, wherein the boundary mirror surface portion is inclined such that an upper end thereof is positioned closer to a passenger compartment side of the vehicle than a lower end.   3. The front side view according to claim 2, wherein the constant curvature mirror surface is formed in a trapezoidal shape in which the lower constant curvature edge on the lower side of the vehicle is longer than the upper curvature edge on the upper side of the vehicle when viewed from the front of the vehicle. apparatus. The constant curvature mirror surface has an inner edge that connects one end of the constant curvature upper edge and the lower edge of the constant curvature, and the boundary mirror surface portion that connects the other ends,
Forming the boundary mirror surface at a desired first angle with respect to vertical;
The front side visual recognition device according to claim 3, wherein the inner edge is formed at a second angle smaller than the first angle. The first reflecting mirror is disposed in front of the door mirror housing;
5. The front side view device according to claim 4, wherein the constant curvature mirror surface forms the inner edge along a vertical line in a vehicle front view.   The front side according to any one of claims 2 to 5, wherein the first reflecting mirror is formed such that the boundary mirror surface portion has a maximum curvature among the curvatures of the vehicle in a plan view and a cross section. Direction visual recognition device.   The free-curvature mirror surface is formed in a trapezoidal shape in which the lower edge of the free curvature on the vehicle lower side is shorter than the upper edge of the free curvature on the vehicle upper side when viewed from the front of the vehicle, and from the curvature of the lower edge of the free curvature in the vehicle plan view. The front side visual recognition device according to any one of claims 1 to 6, wherein the curvature is smoothly reduced toward the curvature of the upper edge of the free curvature.

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