JPH07306092A - Vehicle-mounted light reception sensor device - Google Patents

Abstract

PURPOSE:To prevent the quantity of light entering a light reception element from decreasing extremely even if a vehicle passes below a land bridge by setting the directional angle of the light reception element to an obtuse angle. CONSTITUTION:A holder 3 is provided on the upper surface of a case 2 for storing a light reception element. The holder 3 causes a plate 4 to be engaged so that the plate 4 can slide freely. The case 2 is provided with a first edge 22 at an opening 21. The plate 4 is provided with a second edge 41. The area of a window W surrounded by the first edge 22 and the second edge 41 corresponds to the slide position of the plate 4. The first edge 22 and the second edge 41 nearly form V shape. The plate 4 is provided with a knob 42 for sliding the plate 4 itself.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted light-receiving sensor device for detecting illuminance outside a vehicle, which is used in a so-called auto light controller for automatically turning on / off the light of the vehicle according to the illuminance outside the vehicle. The present invention relates to an improvement of a light receiving sensor device for a vehicle.

[0002]

2. Description of the Related Art Conventionally, this type of technology has a structure as shown in FIG. That is, the structure is such that the amount of light incident on the light receiving element a can be adjusted by vertically moving the sensitivity adjusting body c fitted in the guide tube b. For example,
This type of technology is disclosed in Japanese Utility Model Laid-Open No. 1-77930.

[0003]

However, in the above-described prior art, since the light beam is incident on the light receiving element a through the elongated pipe-shaped guide tube b, the directivity angle θ1 is relatively acute as shown in FIG. Has become. Therefore, as shown in FIG. 5, when the vehicle d equipped with the light receiving sensor device passes under the overpass e, the amount of light incident on the light receiving element a is extremely reduced. The taillight g may be erroneously turned on. Therefore, an occupant of an oncoming vehicle (not shown) may mistakenly recognize that the heading f has been turned on for the passing operation, or an occupant of a following vehicle (not shown) may see the lighting of the taillight g and brake. There was a possibility of misunderstanding that it was operated. Therefore, it was not preferable for safe driving.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and improves the structure of a vehicle-mounted light-receiving sensor device so that the directivity angle is obtuse, so that the vehicle is under the overpass. It is an object of the present invention to provide a vehicle-mounted light receiving sensor device in which the amount of light incident on the light receiving element does not extremely decrease even when passing through

That is, the present invention comprises a light receiving element, a case for accommodating the light receiving element, a holder provided on the upper surface of the case, and a plate slidably fitted in the holder, and the case Has a first edge in the opening and the plate has a second edge, and the area of the window surrounded by the first edge and the second edge corresponds to the sliding position of the plate. An on-vehicle light receiving sensor device is provided.

Also, in the above invention, there is provided a vehicle-mounted light receiving sensor device in which at least one of the first edge and the second edge has a substantially V shape.

Also, in the above invention, there is provided a vehicle-mounted light receiving sensor device in which the plate has a knob for slidingly operating the plate.

[0008]

[First Embodiment] A preferred embodiment according to the present invention is shown in FIG.
~ It demonstrates based on FIG. In the drawings, 1 is a light receiving element, 2 is a case, 3 is a holder, 4 is a plate, 4 is a filter cover, and 6 is a dashboard. Each of these configurations will be described below.

First, the light receiving element 1 is an element that receives visible light incident from the outside of the vehicle, and is composed of, for example, a phototransistor. The light receiving element 1 includes a case 2
The substrate 23 therein is placed.

The case 2 is made of synthetic resin containing an opaque pigment such as black, and the holder 3 is integrally formed on the upper surface of the case 2. The case 2 has an opening 21 at the position where the holder 3 is formed. The opening 21 has, for example, a pentagonal shape in this embodiment, and has a substantially V-shaped first edge 22.

The plate 4 has a thin plate shape and is made of an opaque material. The plate 4
Is formed of a synthetic resin of the same material as the case 2, but may be formed of, for example, a metal plate. The plate 4 has a substantially V-shaped second edge 41 and a knob 42 for slidingly operating the plate 4, and is slidably fitted to the holder 3.

The area of the window W surrounded by the first edge 22 of the case 2 and the second edge 41 of the plate 4 faces the sliding position of the plate 4. It should be noted that the case 2 and the holder 3 may be provided with fixing means (not shown) for fixing the sliding position of the plate 4.

A light receiving sensor device U having the above-mentioned structure
Is installed under the dashboard 6 of the vehicle. At that time, a dashboard 6 is opened on the front surface of the light receiving element 1 and a filter cover 5 is fitted and arranged therein.

Next, the operation of the above embodiment will be described.
For example, when the plate 4 is moved from the position shown by the solid line in FIG. 2 to the position shown by the phantom line, the area of the window W becomes wider and the amount of light received by the light receiving element 1 increases. As described above, when the plate 4 is moved, the area of the window W is changed and the light receiving amount of the light receiving element 1 is increased or decreased. Therefore, when it is desired to change the illuminance outside the vehicle when the vehicle illuminating lamp is turned on according to the user's preference, the sliding position of the plate 4 is changed as described above.

In the light receiving sensor device U of this embodiment, the directivity angle θ2 of the light receiving element 1 is a relatively obtuse angle. Therefore, as shown in FIG. 3, even if the vehicle 7 equipped with the light-receiving sensor device U passes under the overpass 8, the amount of light incident on the light-receiving element 1 does not extremely decrease, and therefore, the auto light controller is operated by the headlight. 7a and the tail lamp 7b are not erroneously turned on.

In the above-mentioned embodiment, the first edge and the second edge are substantially V-shaped, but they may be appropriately shaped, for example, arcuate or square.

[0017]

Since the present invention has the above-mentioned structure and operation, it has the following effects. That is, since the directivity angle of the on-vehicle light receiving sensor device is relatively obtuse, even when the vehicle passes under the overpass, the amount of light incident on the light receiving element does not extremely decrease, and the auto light controller is The tail light will not be erroneously turned on. Therefore, an occupant of an oncoming vehicle or a following vehicle does not mistakenly recognize a passing operation or a brake operation, and an undesired malfunction in safe driving is reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a preferred embodiment of the present invention.

FIG. 2 is a top view of what is shown in FIG.

FIG. 3 is an explanatory view showing a state in which a vehicle equipped with the one shown in FIG. 1 passes under a viaduct.

FIG. 4 is a cross-sectional view of an essential part showing a conventional technique.

5 is an explanatory view showing a state in which a vehicle equipped with the vehicle shown in FIG. 4 passes under a viaduct.

[Explanation of symbols]

 1 light receiving element 2 case 3 holder 4 plate 5 filter cover 6 dashboard 21 opening 22 first edge 41 second edge 42 knob W window U light receiving sensor device

Claims (3)

[Claims] 1. A light receiving element (1), a case (2) for accommodating the light receiving element (1), a holder (3) provided on the upper surface of the case (2), and a holder (3) mounted on the holder (3). A plate (4) movably fitted, the case (2) having a first edge (22) in the opening (21), and the plate (4) having a second edge (41). An in-vehicle light receiving sensor device which has a window (W) surrounded by the first edge (22) and the second edge (41) and which corresponds to the sliding position of the plate (4). . 2. The vehicle-mounted light receiving sensor device according to claim 1, wherein at least one of the first edge (22) and the second edge (41) is substantially V-shaped. 3. The vehicle-mounted light receiving sensor device according to claim 1 or 2, wherein the plate (4) has a knob (42) for slidingly operating the plate (4).