JP2536209Y2 - Rear monitoring device for vehicles - Google Patents

Rear monitoring device for vehicles

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Publication number
JP2536209Y2
JP2536209Y2 JP1990010809U JP1080990U JP2536209Y2 JP 2536209 Y2 JP2536209 Y2 JP 2536209Y2 JP 1990010809 U JP1990010809 U JP 1990010809U JP 1080990 U JP1080990 U JP 1080990U JP 2536209 Y2 JP2536209 Y2 JP 2536209Y2
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Japan
Prior art keywords
vehicle
subject
curvature
radius
rear
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Application number
JP1990010809U
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Japanese (ja)
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JPH03102344U (en
Inventor
雅彦 黒田
Original Assignee
日産車体株式会社
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Priority to JP1990010809U priority Critical patent/JP2536209Y2/en
Publication of JPH03102344U publication Critical patent/JPH03102344U/ja
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Publication of JP2536209Y2 publication Critical patent/JP2536209Y2/en
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Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a vehicular rear monitoring device for monitoring the rear of a vehicle.
The present invention relates to a monitoring device that checks the vicinity of the rear end of a vehicle.

(Prior art) Conventionally, as a vehicle rear monitoring device, for example,
The one described in -34037 is known. The rear view monitoring device for a vehicle secures a rear view that cannot be covered by a rearview mirror by using a video camera provided at the rear of the vehicle and pointing backward, and a monitor display provided at the front of the driver's seat.

(Problem to be Solved by the Invention) However, according to this conventional technique, the subject is directly captured, and the monitoring range is the same in the vehicle width direction and the vehicle front-rear direction. If the monitoring range is set to an appropriate range, the monitoring range in the vehicle front-rear direction becomes unnecessarily wide. Conversely, if the monitoring range is set to an appropriate range in the vehicle front-rear direction, the monitoring range in the vehicle width direction cannot be sufficiently obtained. By the way, when monitoring the rear of the vehicle, when monitoring a distant area behind the vehicle instead of the rearview mirror,
There are two cases in which the vicinity of the rear end of the vehicle is monitored for safety confirmation when the vehicle retreats. In the latter case, the above-described problem occurs.

Therefore, it is desired that the visual field range can be arbitrarily selected in the vehicle width direction and the front-back direction.

It should be noted that the problem to be solved as described above is that the applicant of the present application also proposes the curvature of a reflecting mirror for providing a subject to an imaging device even in the vehicular rear monitoring device of Japanese Patent Application No. 1-14935. Could not be resolved because it was constant.

As means for solving such a problem, there is a means for digitally processing a signal input from the imaging apparatus. In this case, however, the circuit becomes complicated and the cost becomes extremely high.

Also, in the device for monitoring the rear, a wide area image was projected without distortion.
There is one described in Japanese Patent No. 4384.

This device serves as a rearview mirror in the above two types of rear monitoring devices, and includes a concave mirror, a plane mirror, an imaging device, and a monitor display.

Thus, this device is suitable for monitoring a subject far away from the vehicle, and is not suitable for monitoring near the rear of the vehicle, as in the present device.

Further, there is a problem that the structure is complicated because a plurality of reflecting mirrors are used. In addition, since the plane mirror is in the field of view of the concave mirror, the plane mirror is not provided as an image to the image pickup apparatus, but there is a problem that light is blocked by an area of the plane mirror and the image becomes dark. In addition, since the plane mirror and the concave mirror are provided, and the degree of freedom in the positional relationship between the plane mirror, the concave mirror, and the imaging device is small, the device becomes large. Furthermore, since the concave mirror converges the parallel incident light, there is a possibility that the image pickup device of the image pickup device will burn if strong light enters.

In view of the above, the present invention focuses on the above-described problems, and makes it possible to reduce the size of the apparatus by setting the visual field range displayed on the monitor display to an appropriate range by a simple method, and to perform imaging using parallel incident light. It is an object of the present invention to provide a vehicle rear monitoring device in which seizure of an element is less likely to occur.

(Means for Solving the Problems) In order to solve the above problems, the vehicle rear monitoring device of the present invention includes a monitor display arranged in front of the driver and an imaging device for monitoring the rear of the vehicle as a subject. In the rear monitoring device for a vehicle, a reflecting mirror for projecting the subject and providing the subject to the imaging device is provided between the imaging device and the subject, and the reflecting mirror has a convex mirror surface, and has a curvature of the mirror surface. The radius is formed such that the radius of curvature in the vehicle front-rear direction is larger than the radius of curvature in the vehicle width direction of the provided subject, and the radius of curvature of the provided subject in the vehicle width direction is closer to the vehicle. In this case, the radius of curvature of the portion providing the subject farther from the vehicle is formed larger than the radius of curvature of the portion providing the subject.

(Operation) In the vehicular rear monitoring device of the present invention, an object provided from the reflector is displayed on a monitor display by the imaging device.

In this case, in the vehicle rear monitoring device of the present invention, since the radius of curvature of the mirror surface of the reflector is formed to be larger in the vehicle longitudinal direction than in the vehicle width direction of the provided subject, the monitoring is performed. The range is wider on the vehicle width direction side and narrower on the vehicle front-rear direction.

Thus, by changing the curvature of the reflecting mirror,
The monitoring range in the vehicle width direction and the front and rear of the vehicle can be arbitrarily selected independently, and the monitoring range in the vehicle width direction is made wider than the range in the vehicle front and rear direction. Range.

Furthermore, in the present invention, the radius of curvature of the provided subject in the vehicle width direction is smaller than the radius of curvature of the portion providing the subject closer to the vehicle than the radius of curvature of the portion providing the subject closer to the vehicle. Is large, so that the monitoring range in the vehicle width direction of the subject close to the vehicle is widened.

Further, as described above, since the subject is provided to the imaging device only through the reflecting mirror, there is nothing to block the light and the image does not become dark.

The viewing angle of the imaging device can be adjusted by adjusting the curvature of the reflecting mirror without adjusting the lens of the imaging device. For example, the viewing angle can be increased simply by increasing the curvature of the reflecting mirror.

In addition, since the reflecting mirror is a convex mirror, parallel incident light is diffused, and image sticking of the image sensor due to strong incident light hardly occurs.

(Example) Hereinafter, an example of this invention is described based on a drawing.

As shown in FIG. 2, a monitor display 6 is arranged in front of the driver of the vehicle 5, and a rearview mirror 16 is provided above the monitor display. This monitor display 6
May be either a CRT or a liquid crystal type.

A video camera (imaging device) 9 and a television antenna 11 are connected to the monitor display 6 via a switching device 12.

The video camera 9 is for rearward confirmation. As shown in FIG. 2 and FIG. 7, the video camera 9 is disposed on the roof end of the roof panel 7 at the rear position of the vehicle 5 so that its optical axis 9a faces the vehicle front-rear direction. It is provided in. In the video camera 9, reference numeral 13 denotes a lens system, 14 denotes an image sensor, and 15 denotes a circuit.

The television antenna 11 is for broadcasting reception, that is, when the switching device 12 is switched to the television antenna 11 side, the monitor display 6 can be used as a broadcasting television receiver, while the switching device 12 is connected to the video camera 9. When the switch is made to the side, the rear can be confirmed on the monitor display 6.

At the rear position of the video camera 9, a reflecting mirror 10 for providing the video camera 9 with the rear side of the vehicle, which is a subject, is attached at an inclination of about 45 ° with respect to the optical axis 9a with the reflecting surface facing downward. I have.

The video camera 9 is set to project the subject's vehicle 5 side to the lower side of the monitor display 6. That is, the reflecting mirror 10 is provided with an image on the side close to the vehicle 5 above the video camera 9, but the video camera 9 is normally provided so that the image on the side of the vehicle 5 is displayed below the monitor display 6. Is 180 °
It is installed in a rotated and reversed state.

 Next, the reflection mirror 10 will be described in detail.

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 1 in which the reflecting mirror 10 is cut in a vehicle width direction on a side closer to the vehicle, and FIG. VV sectional view of FIG.
The figure shows a first view in which the reflector 10 is cut in the vehicle longitudinal direction at the center position.
VI-VI sectional view of the figure, as shown in these figures,
The reflecting mirror 10 has a curvature radius r1 of a section IV-IV (a curvature radius in a vehicle width direction of a portion providing a side closer to the vehicle) of 40 mm, and a curvature radius r2 of a section V-V (a side farther from the vehicle). Radius of curvature in the vehicle width direction of the part providing the
-VI has a radius of curvature r3 (radius of curvature in the longitudinal direction of the vehicle) of 120 mm
Is formed. That is, the radius of curvature r3 of the provided subject in the vehicle longitudinal direction (equal to the vehicle 5 longitudinal direction in this embodiment)
Are formed to be larger than the radii of curvature r1 and r2 in the vehicle width direction (equal to the vehicle width direction of the vehicle 5 in this embodiment) of the object to be provided. The radius of curvature r2 of the portion providing the far side is formed larger than the radius of curvature r1 of the portion providing the side close to.

Accordingly, the viewing angle of the image provided from the reflecting mirror 10 to the video camera 9 is about 100 ° on the side closer to the subject vehicle in the vehicle width direction, and the viewing angle on the far side of the subject vehicle in the vehicle width direction. θ2 becomes even it near about 90 °, the monitoring range l 2 is about 4m by it. On the other hand, the vehicle next viewing angle θ3 of about 50 ° in the longitudinal direction, the monitoring range l 1 by it is about 2m.

 Next, the operation of the embodiment will be described.

When the switching device 12 is switched to the video camera 9, the monitor display 6 shows a state behind the vehicle provided through the reflecting mirror 10.

In this case, since the video camera 9 is installed upside down from the normal position, the monitor display 6 displays the right side of the vehicle in the same manner as the rear view mirror 16 even though the video camera 9 faces rearward. Is projected on the right side of the monitor display 6, the subject on the left side of the vehicle is projected on the left side of the monitor display 6, and the subject closer to the vehicle 5 is projected on the lower side of the monitor display 6, and vice versa. The more distant the subject is from the vehicle, the more the image is displayed on the upper side of the monitor display 6.

As described above, in the monitor display 6, the rearview mirror
Since the subject is displayed in the same positional relationship as that shown in FIG. 16 (the left and right sides are not reversed, and the vertical relationship between the near side and the far side of the vehicle is not reversed), the driver feels strange on the monitor display 6. You can see without.

Then, as described above, the curvature radii r1 and r2 are made different, and the viewing angle in the vehicle width direction is increased from the viewing angle θ1 closer to the vehicle to the viewing angle θ2 farther away as shown in FIG. The rear portion of the vehicle can be displayed on the monitor display 6 to a higher position.

In addition, the radius of curvature r3 of the side providing the vehicle front-rear direction is made larger than the radius of curvature r1 and r2 of the side providing the vehicle width direction, so that the viewing angles θ1 and θ2 in the vehicle width direction are larger in the vehicle front-rear direction. Because the viewing angle θ3 is made smaller,
The monitor display 6 displays an optimum range for monitoring the rear part of the vehicle.

As described above, in the present embodiment, an extremely simple configuration in which a subject is provided to the video camera 9 via one convex reflecting mirror 10 without having a complicated circuit for performing digital signal processing is provided. The monitoring range of the subject behind the vehicle can be arbitrarily adjusted independently in the vehicle width direction and the vehicle front-rear direction, and further arbitrarily adjusted in the vehicle width direction between the near side and the far side of the vehicle. The effect is obtained.

Further, since there is no obstacle between the reflector 10 and the video camera 9, an effect that a small and bright image can be displayed can be obtained, and the use of a wide-angle lens for the video camera 9 becomes unnecessary, and the cost is reduced. In addition, the effect that a simple lens can be used is obtained, and since the convex reflecting mirror 10 does not converge parallel rays, it is difficult for image pickup elements such as the image sensor 14 to burn in due to strong light entering. The effect is obtained.

Although the embodiment has been described with reference to the drawings, the present invention is not limited to this embodiment. For example, in the embodiment, the optical axis 9a of the video camera 9 is disposed so as to be in the vehicle front-rear direction. 9a may be arranged so as to face the vehicle width direction. In this case, the reflecting mirror 10 is disposed obliquely at an angle of, for example, 45 ° with respect to the vehicle longitudinal direction, the vehicle width direction, and the vertical direction.

(Effects of the Invention) As described above, in the vehicular rear monitoring device of the present invention, the subject is provided to the photographing device via the reflecting mirror, and the reflecting mirror has a mirror surface formed in a convex shape, and also has a mirror surface in the vehicle width direction. The radius of curvature in the longitudinal direction of the vehicle is formed larger than the radius of curvature,
And, in the radius of curvature in the vehicle width direction, the radius of curvature on the side farther from the vehicle is formed larger than the radius of curvature on the side closer to the vehicle, so that a desired monitoring range can be obtained without changing the lens configuration of the imaging device. The effect of being able to obtain is obtained.

Further, since only one convex mirror is used as the reflecting mirror, an effect that a small and bright image can be displayed can be obtained, and the image pickup element is hardly burned in due to the intense light. The effect is obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a configuration of a rearward monitoring device according to an embodiment of the present invention, FIG. 2 is an overall view showing a vehicle equipped with the embodiment device, FIG. 3 is an explanatory diagram showing a viewing angle of the embodiment device, FIG. Fig. 4 is the first
FIG. 5 is a cross-sectional view taken along line IV-IV of FIG. 5, FIG. 5 is a cross-sectional view of VV of FIG. 1, FIG. 6 is a cross-sectional view of VI-VI of FIG. 1, and FIG. FIG. 6: Monitor display 9: Video camera (imaging device) 10: Reflector r3: Curvature radius in the vehicle longitudinal direction r1 ... Curvature radius in the vehicle width direction closer to the vehicle r2 ... Farther from the vehicle Curvature radius in the vehicle width direction

Claims (1)

(57) [Scope of request for utility model registration]
1. A rearward monitoring device for a vehicle, comprising: a monitor display arranged in front of a driver; and an imaging device for monitoring the rear of the vehicle as a subject, wherein a subject is projected between the imaging device and the subject. The imaging device is provided with a reflecting mirror for providing a subject, and the reflecting mirror has a mirror surface formed into a convex surface, and the radius of curvature of the mirror surface is smaller than the radius of curvature of the providing subject in the vehicle width direction in the vehicle longitudinal direction. Is larger, and the radius of curvature of the providing subject in the vehicle width direction is the curvature of the portion providing the subject farther to the vehicle than the radius of curvature of the portion providing the subject closer to the vehicle. A rearward monitoring device for a vehicle, wherein the radius is formed to be larger.
JP1990010809U 1990-02-05 1990-02-05 Rear monitoring device for vehicles Active JP2536209Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990010809U JP2536209Y2 (en) 1990-02-05 1990-02-05 Rear monitoring device for vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990010809U JP2536209Y2 (en) 1990-02-05 1990-02-05 Rear monitoring device for vehicles

Publications (2)

Publication Number Publication Date
JPH03102344U JPH03102344U (en) 1991-10-24
JP2536209Y2 true JP2536209Y2 (en) 1997-05-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990010809U Active JP2536209Y2 (en) 1990-02-05 1990-02-05 Rear monitoring device for vehicles

Country Status (1)

Country Link
JP (1) JP2536209Y2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003054316A (en) * 2001-08-21 2003-02-26 Tokai Rika Co Ltd Vehicle image pick-up device, vehicle monitoring device, and door mirror
JP4659640B2 (en) * 2006-02-24 2011-03-30 オスラム・メルコ株式会社 Lighting equipment using light-emitting diodes
JP5052687B2 (en) * 2011-06-20 2012-10-17 株式会社Ayaコーポレーション Lamp
JP5948753B2 (en) * 2011-07-27 2016-07-06 市光工業株式会社 Mirror for vehicle and vehicle equipped with this vehicle mirror

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60119178U (en) * 1984-01-19 1985-08-12
JPH0247666Y2 (en) * 1984-02-20 1990-12-14

Also Published As

Publication number Publication date
JPH03102344U (en) 1991-10-24

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