JPS6234824A - Extreme point position indicating device for vehicle - Google Patents

Abstract

PURPOSE:To enable a driver to make sure of an extreme point position with ease only when required in a simple manner by configurating a device in such a manner that a point indicating unit is provided in a cabin, and an image of a point mark is formed and indicated in the vicinity of front ends of a vehicle by an optical indicating means. CONSTITUTION:A point mark indicating unit 2 is composed of an indicating plate 21 which has a point mark 22a of a semitransparent pattern, a lamp 23, and of a case 24. In addition, following items are also provided: a switch 3 for turning on or off the lamp 23, and a front glass 4 which functions as a combiner. And each of plane mirrors 1a through 1c is arranged in such a way that a light reflected from a point D on the front glass 4 comes into a driver's eye E after the light emitted from the indicating unit 2 has been reflectedby each of points A through C on the plural number of plane mirrors 1a through 1c. And the position and direction of the plane mirrors 1c is set so that the point D on the front glass 4 lies on a straight line which connects the above said point E with a front side point of the vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle tip position display device that allows a driver to visually confirm the tip position of a vehicle using a head-up display device.

(Prior Art) When parking a vehicle in a garage or driving through a narrow passage, the front end of the vehicle may accidentally come into contact with a wall, utility pole, or other obstacle. For this reason, traditionally, a pole was set up at the front end of the vehicle (or left front end in the case of a right-hand drive vehicle), and the distance between this pole and a wall or other obstacle was visually measured to determine whether or not contact would occur. , the distance to the wall is measured by projecting two beams onto the wall and visually checking the changes in the irradiation pattern (Japanese Patent Laid-Open No. 50-21762).
No. and Utsukko No. 56-35771).

However, in such conventional methods, since poles and other protrusions are attached to bumpers etc., there is a risk of contact with pedestrians, and since force is applied to the pole attachment point, the vehicle body, There was a problem in that bumpers and other parts were damaged, further detracting from the design of the vehicle. The latter also has the problem that if the lens becomes dirty with mud or the like, beam irradiation becomes incomplete and distance cannot be measured.

On the other hand, conventionally, driving information such as vehicle speed, mileage, fuel level, time, and various warnings were displayed using meters, clocks, or warning lamps installed on the instrument panel, but recently drivers have been able to display these information while driving. In order to view driving information without having to take one's eyes away from the front field of view, a display device has been devised in which the driving information is imaged on the outside of the windshield. ), it is called a heads-up display device.

Therefore, it would be convenient if this head-up display device could be used to confirm the position of the front end of the vehicle.

(Object and Structure of the Invention) An object of the present invention is to use a head-up display device to solve the above-mentioned problems while making it possible to visually recognize the position of the leading edge of a vehicle. A mark display body is installed, and the tip mark is imaged and displayed near the tip of the vehicle using optical display means.

(Example) The present invention will be explained below based on the drawings.

FIG. 1 is a diagram showing an embodiment of a vehicle tip position display device according to the present invention. In the figure, 1a.

1b and 1c are plane mirrors, and 2 is a tip mark indicator.
Tip mark 22a of a semi-transparent pattern as shown in FIG.
It consists of a display board 21, a lamp 23, and a case 24. 3 is a switch for turning on and off the lamp 23, and 4 is a freon 1 glass that functions as a combiner. plane mirror 1
a, 1b, 1c, the light emitted from the display body 2 is a plane 111a,
It is installed so that the light is reflected at points A, B, and C on 1b and lc, and then reflected by the dots on the windshield and enters the driver's eyes E. In addition, the foul dots on the windshield are E
Plane mirror 1C so that it is on the straight line connecting the
Set the position and direction.

With the above configuration, when the driver turns on the switch 3 in a parking lot, etc., the lamp 23 inside the tip mark display body 2 lights up, and the light exiting the tip mark display body 2 is directed to points A, B, C, and D. and reaches the driver's eyes E. The distance this light travels,
In other words, since the optical path length and the distance from the driver to the left front edge of the vehicle are the same, the driver is at the same distance as the front left edge of the vehicle.
Since the tip mark display image 22b is viewed in the same direction, by superimposing the tip mark display image 22b and the obstacle in that direction, it is possible to easily compare the distance and determine whether or not there will be contact. Can make accurate judgments.

Next, FIG. 3 shows a second embodiment of the vehicle tip position display device according to the present invention. Components in the figure that are the same as those in FIG. 1 are given the same reference numerals.

This embodiment uses a lens 5 to shorten the optical path length and downsize the device. The focal length of the lens 5 and the distance between the lens 5 and the tip mark display body 2 are set so that the tip mark display image 22b is formed at the front end position of the vehicle.

Note that instead of providing the lens 5, it is also possible to install a concave mirror 6 at the zero point as shown in FIG. 4, or to use a lens and a concave mirror together.

Next, FIG. 5 shows a third embodiment of the vehicle tip position display device according to the present invention. Components in the figure that are the same as those in FIG. 1 are given the same reference numerals. In this embodiment, a combiner 7 is provided separately from the windshield 4, and the tip mark display image 22b is projected onto the combiner 7, so that the mirror 1c,
Lens 5. The degree of freedom in removing the tip mark display body 2 is increased. In other words, if the windshield 4 is used as a combiner, the installation location is restricted because the optical system of the device interferes with the air conditioner duct inside the dash board, but if the combiner 7 is used, the optical path can be changed and the installation position of the optical system can be changed. can be determined freely to some extent. Further, by using colored glass or the like, the light transmittance of the combiner 7 can be lowered to increase the contrast between the background and the displayed image, thereby making it possible to make the tip mark displayed image 22b more visible.

In the above three embodiments, the tip mark display image 22b is displayed on the left front end of the vehicle, but the configuration is not limited to this.
As shown in the figure, it is also possible to display the front end mark display 122b in front of the driver for convenience when parking facing a wall, and this is done using the plane mirror 1c, lens 5. This can be easily achieved by adjusting the position or direction of the tip mark display body 2 and changing the display direction or distance. Furthermore, the position of the rear end of the vehicle can also be displayed using a similar configuration.

(Effects of the Invention) As explained above, in the present invention, the tip mark display body is installed in the vehicle interior, and the tip mark is imaged and displayed near the tip of the vehicle by optical display means. Therefore, it is possible to easily see the end position of the vehicle only when necessary, without providing a protrusion such as a pole or a beam lamp for distance measurement.

In addition, in the second embodiment, the device can be made smaller by using a lens, and in the third embodiment, the degree of freedom in installing the device is increased by providing a separate combiner, and the tip mark display image '4JA recognition can be improved by increasing the contrast.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the vehicle tip position display device according to the present invention, FIG. 2 is an enlarged view of the tip mark display body in FIG. 1, and FIGS. 3 to 6 are according to the present invention. FIG. 3 is a schematic diagram showing another embodiment of the vehicle tip position display device.

Claims (1)

[Claims] A tip position display device for a vehicle, comprising a tip mark display body provided in a vehicle interior, and an optical display means for displaying an image of the tip mark near the tip of the vehicle.