JP3010039U - Car mirror - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a mirror for a vehicle, which has a simple structure and which can expand the visual field of view to the rear and the surroundings to ensure safety when driving a vehicle. Providing automobile mirrors that allow you to accurately check and confirm the object to be confirmed with little distortion. Providing a mirror for automobiles that makes it possible to obtain a correct sense of distance by projecting an object to be checked in a ratio of vertical and horizontal. [Structure] A mirror is provided on an automobile through a supporting portion and a holding portion so as to be positionally adjustable. At least one of the upper and lower edges and side edges of the main body mirror portion of the mirror is formed by the following mathematical formula in the extending direction, and is formed into a curved surface passing through each arc whose radius of curvature gradually decreases toward the end. A gradually changing mirror portion formed on a curved surface of a hyperbola assumed in relation to each position with respect to a direction orthogonal to the extending direction is integrally provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automobile mirror (in the present invention, an automobile includes both a four-wheeled vehicle and a two-wheeled vehicle).

[0002]

[Prior art]

 Outside mirrors, inside mirrors, side under mirrors, etc. are generally known as automobile mirrors for confirming the rear and surroundings of automobiles. As shown in Japanese Patent Application Laid-Open No. 4-20818, a rectangular rear-view mirror body having a curved body and having a longitudinal direction in the up-and-down direction is provided with an intersection point located on the upper side of one side and a line connecting the intersection points is formed. A diagonal line is set orthogonal to the intermediate point, the center is located on the diagonal line, and an arc is drawn with a predetermined radius that passes through the intersection point to provide a boundary, and a radius larger than the radius from the central point is set. A boundary is created by drawing an arc that intersects with the lower side of the side and intersects with the other side of the lower side, and is unevenly distributed on the upper side of the rear-view mirror body and occupies approximately half the area. The rear visible area of the spherical surface, the downward visible area consisting of the spherical surface located on the lower side of the rearview mirror body, and the joint area of the spherical surface that connects both areas are defined, and the midpoint is passed vertically. Set the line to be set, and set the radius of curvature of the spherical surface of the rear visual recognition area where the center point is located on that line to the specified standard value, and the radius of curvature of the spherical surface of the lower visual area where the center point is located on the same line to the rear visual area. Not less than the curvature of the area, and the radius of curvature of the spherical surface of the joining area where the center point is located on the same line is smaller than the curvature radius of the rear visual recognition area and larger than the radius of curvature of the lower visual recognition area. An automobile mirror has been proposed in which the radius of curvature of a part is inscribed in a large radius of curvature and a small radius of curvature is inscribed in order to sequentially shift and continue.

[0003]

[Problems to be solved by the device]

 However, although the mirror for automobiles disclosed in the above publication is a concave mirror, the confirmation field of view is expanded based on the principle of a convex mirror that images gather on the same optical axis. Cannot be expanded.

Even if the above principle is correct, the automobile mirror described in the publication is a mirror of large curvature provided with a joining area on a mirror of small curvature, which is integrated with the mirror of large curvature. It was not possible to get an accurate sense of distance to the object to be confirmed because the size of the image reflected on the mirror of curvature was very different. In addition, when the image of the object is projected across a mirror with a large curvature and a joining area and a mirror with a small curvature, the aspect ratio of the image in each area is greatly different and the image of the joining area is distorted. Therefore, the target could not be confirmed accurately.

The present invention has been devised to solve the above-mentioned conventional drawbacks, and an object thereof is to expand a visual field for confirming the rear and the surroundings with a simple structure to improve safety when driving a vehicle. An object of the present invention is to provide an automobile mirror that can improve the property.

Another object of the present invention is to provide an automobile mirror that enables an object to be confirmed to be imaged in a state with little distortion and to be accurately confirmed.

Still another object of the present invention is to provide a mirror for an automobile, which makes it possible to obtain a proper sense of distance by projecting an object to be confirmed at a substantially constant ratio in length and width.

[0008]

[Means for solving problems]

 Therefore, the present invention relates to an automobile mirror in which the position of the mirror is adjustable through a supporting portion and a holding portion in the automobile, and the mirror body main body of the mirror is extended to at least one side edge of the upper and lower edges and side edges. The radius of curvature calculated by the following formula gradually decreases with respect to the direction, and it is formed into a curved surface that passes through each arc, and a hyperbolic curved surface that is assumed in relation to each position in the direction orthogonal to the extension direction is formed. The feature is that the formed gradually changing mirror part is integrated.

[0009]

[Equation 1]

[0010]

[Function of the device]

 According to the present invention configured as described above, the gradually changing mirror portion formed continuously and integrally with the main body mirror portion of the mirror has arcs whose radius of curvature becomes gradually smaller in the extending direction. Since it is formed on a curved surface that passes through and is formed on a hyperbolic curved surface that is assumed to be in relation to each position in the direction orthogonal to the extension direction, it is necessary to project an image with a substantially constant vertical and horizontal ratio. You can For this reason, it is possible to improve the safety of vehicle driving by enlarging the view field for confirming the rear, and it is possible to accurately grasp the sense of distance to the target object when confirming the rear.

[0011]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings showing an embodiment in which an outside mirror is implemented.

1 to 7, an outside mirror 1 as an automobile mirror (FIGS. 1 to 4 show the right outside mirror, but the left outside mirror has a symmetrical structure and has the same structure. An illustration and a detailed description thereof are omitted) is foldably attached to a door (not shown) of an automobile through a support portion 3. A mirror 7 is supported on the holding portion 5 of the outside mirror 1 so that its position can be adjusted.

The mirror 7 is made of glass or synthetic resin and is surface-plated or back-plated and includes a main body mirror section 9 and a gradually changing mirror section 11 located on the right side of the main body mirror section 9. The main body mirror unit 9 is substantially formed as a plane mirror, and the boundary between the main body mirror unit 9 and the gradually changing mirror unit 11 is set at the gradually changing start position. According to the relationship shown, the radius of curvature is set to gradually decrease toward the right. Further, the gradually changing mirror portion 11 is formed so that the upper and lower surfaces thereof are hyperbolic curved surfaces at respective points from the middle in the vertical direction to the right.

[0014]

[Equation 1]

In Equation 1, A1, A2, ... An-1, An are aspherical coefficients indicating the degree of aspherical surface at each position (x1, x2 ... Xn-1, xn) in the lateral direction, and n is arbitrary. Is an integer, K = 0, C = 1 / 400.000.

Next, a curved surface state of the gradually changing mirror unit 11 will be described.

As shown in FIG. 5, a straight line L 1 extending rightward from the vertical middle point (x 0) of the gradual change start position, which is the boundary between the main body mirror section 9 and the gradual change mirror section 11, is Assume positions x1, x2 ... Xn-1 and xn on L1 which are spaced a predetermined distance from the gradual change start position. Then, after calculating the radius of curvature of each position by including the numerical values of each position x1, x2 ... Xn-1, xn in Formula 1, the non-spherical surface coefficient A1 at each position x1, x2 ... xn-1, xn is calculated. , A2 ... An-1, An arc is set around the position corresponding to An, and an aspherical curve C1 passing through these arcs in common is set. The radius of curvature of this aspherical curve gradually decreases from the gradual change start position to the right, and the radius of curvature at the right end is set to, for example, 500 mm.

Further, the orthogonal axes at the respective positions x1, x2 ... Xn-1, xn on the straight line L1 are Lx1, Lx2 ... Lxn-1, Lxn.Ly1, Ly2 ... Lyn-1, Lyn, Let the intersections of the straight lines Lx1, Lx2 ... Lxn-1, Lxn and the aspherical curve C1 be a1, a2 ... An-1, an.

Then, a hyperbola passing through the intersection points a1, a2 ... An-1, an with the aspherical curve C1 is determined to form a curved surface.

That is, the respective curves C2 in the upper half of the straight line L1 are determined as hyperbolas shown in FIG. In FIG. 7, reference symbol tk is the height of the upper half of the straight line L1 in the gradual change mirror unit 11, dk is the depth of the upper end of the gradual change mirror unit 11, and the reference symbol A in the figure is the intersection aα (α is 1 ≤α ≤n), and the symbol B is the upper end of the gradually changing mirror unit 11 at the intersection aα. Then, a hyperbola Ck passing through diagonal positions Aα and Bα in a rectangle having a height tk and a depth dk is determined.

This hyperbola is expressed by the equation of x2 / a2-y2 / b2 = 1. Then, if the positions Ak = P (θ) and Bk = P0 on the hyperbola passing through the diagonals of the rectangle with P (θ) and P0 as the diagonals, then the relationship shown in Equation 2 and FIG. 8 is established.

[0022]

[Equation 2]

[0023] In addition, if the curvature of the point P0 and R0, in the hyperbolic, the relationship of a + R0 · b ² = 0 is established.

In the above equation, a is in relation to the aspherical curve C1 at the positions a1, a2 ... An-1, an, and the curvatures R1, R2 at the positions a1, a2n ... An-1, an ... Since Rn-1 and Rn are set to desired values, respectively, the values of these positions a1, a2n ... An-1, an and curvatures R1, R2 ... Rn-1, Rn are set. Calculate b to determine the hyperbolic equation.

Next, the lattice pattern projected on the mirror body having the gradually changing portion formed as described above will be described.

Now, when a mirror pattern is drawn on the mirror 7 at intervals of, for example, 10 mm and the mirror 7 is irradiated with light, a gradual change mirror is displayed on the screen arranged facing the mirror 7 as shown in FIG. Since the horizontal direction of the portion 11 is formed by the above-mentioned mathematical expression 1 and the vertical direction is formed by the curved surface obtained by the hyperbola, the horizontal and vertical ratios are almost constant from the gradual change start position to the right end and the upper and lower ends. A magnified image is projected. At this time, in contrast to the image projected on the screen, the gradual change mirror portion 11 of the mirror 7 has a horizontal and vertical ratio that is gradually the same from the gradual change start position to the right and up and down directions. A reduced image is projected.

Next, an enlarged state of the rear confirmation visual field will be described.

In FIGS. 10 and 11, the rear confirmation visual field of the conventional outside mirror 21 is determined by the line-of-sight angle of the driver with respect to the right end of the mirror 23. In this case, as shown in FIG. 10, it is possible to confirm the rear of the angle substantially matching the angle c of the line of sight with respect to the vertical line assumed at the right end of the mirror 23. On the other hand, in the out side mirror 1 according to the present invention, as shown in FIG. 11, the angle of the line of sight with respect to the vertical line which is assumed at an arbitrary position of the gradually changing mirror portion 11 provided at the right end portion of the mirror 7 is conventionally set. Since the angle α can be made larger than the angle c, the rear can be confirmed in a wide range. In this case, as described above, since the gradual-change mirror unit 11 can project the image in each position with the vertical and horizontal ratios kept substantially constant, the image projected in each position becomes vertically or horizontally long. It is possible to prevent the occurrence of distance and secure a sense of distance to the object to be projected. Further, for the same reason, it is possible to prevent the image projected on the gradually changing mirror unit 11 from being greatly distorted, and it is possible to accurately confirm the object.

In the above description, the automobile mirror is the outside mirror 1 and the gradually changing mirror section 11 is provided at the outer end (right end and left end) of the main body mirror section 9 of the plane mirror in the mirror 7. The variable mirror portion 11 may be provided at either or both of the upper edge portion and the lower edge portion in addition to the outer end portion. Further, the main body mirror portion 9 of the mirror 7 may be a convex mirror having a larger radius of curvature. Further, as the automobile mirror, an inside mirror may be used, and in the case of implementing the inside mirror, a gradually changing portion may be provided at each outer end portion of the main body portion made of a plane mirror or a convex mirror.

[0030]

[Effect of device]

 Therefore, according to the present invention, it is possible to secure the safety while driving the vehicle by expanding the visual field for confirming the rear and the surroundings with a simple structure.

The present invention also makes it possible to accurately confirm an object to be confirmed by displaying it in a state with little distortion.

Further, the present invention makes it possible to obtain a correct sense of distance by projecting the confirmation object at a substantially constant ratio in the vertical and horizontal directions.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a curved surface state of a gradually changing mirror portion.

FIG. 2 is a perspective view showing the outline of an outside mirror.

FIG. 3 is a vertical sectional view taken along the line III-III in FIG.

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.

FIG. 5 is an explanatory view showing a lateral curved surface formation state in the gradually changing mirror portion.

FIG. 6 is an explanatory diagram showing a vertical curved surface formation state in the gradually changing mirror portion.

FIG. 7 is an explanatory diagram showing a principle of forming a vertical curved surface of the gradually changing mirror portion.

FIG. 8 is an explanatory diagram showing a principle of forming a vertical curved surface of the gradually changing mirror portion.

FIG. 9 is an explanatory diagram showing a lattice pattern projected on a screen.

FIG. 10 is an explanatory diagram showing a rear confirmation visual field of a conventional outside mirror.

FIG. 11 is an explanatory view showing a rear confirmation visual field of the outside mirror according to the present invention.

[Explanation of symbols]

 1 Outside mirror as an automobile mirror 3 Support part 5 Holding part 7 Mirror 9 Main body mirror part 11 Gradual change mirror part

 ─────────────────────────────────────────────────── ─── Continuation of front page (73) Utility model holder 594090779 Harumasa Ota 72-1, Yushima Oshima-cho, Toyota-shi, Aichi (73) Holder of utility model 594183417 Hiromasa Kondo 40 Kaminogo, Igaya-cho, Kariya-shi, Aichi (72) Inventor Hiroshi Kondo 29, Hachigaike, Miyoshi, Miyoshi-cho, Nishikamo-gun, Aichi Prefecture 173 (72) Inventor Shinji Ota 2-20-16 Hirako, Minami-ku, Nagoya (72) Inventor Tomooka Misato-cho, Owariasahi-shi, Aichi Prefecture 69 out of 1, 70 out of 2 (72) Inventor Harumasa Ota 72-1 Yutaka Oshima-cho, Toyota City, Aichi Prefecture 72-1 (72) Inventor Hiromasa Kondo 40 Uenogo, Inagaya-cho, Kariya City, Aichi Prefecture

Claims (3)

[Scope of utility model registration request] 1. A mirror for an automobile, the position of which is adjustable in a vehicle through a supporting portion and a holding portion, wherein at least one of the upper and lower edges of the main body mirror portion of the mirror and the side edge of the mirror with respect to the extending direction. The hyperbolic surface that is calculated by the following formula and is formed on the curved surface that passes through each arc whose radius of curvature gradually decreases toward the end and is assumed in relation to each position in the direction orthogonal to the extending direction. An automotive mirror that is integrally provided with the gradually changing mirror portion formed on. [Equation 1] (However, A1.A2 .......... An-1.An is an aspherical surface coefficient that indicates the degree of aspherical surface between positions in the extension direction, n is an arbitrary integer,
K = 0, C = 1 / 400.000) 2. A mirror for an automobile according to claim 1, wherein the main body mirror portion of the mirror is a plane mirror. 3. A mirror for an automobile according to claim 1, wherein a main body mirror portion of the mirror is a convex mirror having a large diameter curvature.