JPH0260852A - Front illumination control device for vehicle - Google Patents

Abstract

PURPOSE:To enable to correspond instantaneously to the sudden change of the lightness in the surroundings such as in a tunnel by lighting a front illuminator on when the specific circumferential darkness is detected by means of a second detecting means and the existence of a rider is detected by means of a first detecting means. CONSTITUTION:In a vehicular front illuminator, especially in a front illuminator 3 of a bicycle, when the riding state of a rider is detected by means of a first detecting means (an infrared sensor) 5 and the specific circumferential darkness is detected by means of a second detecting means (CdS component) 6, the light source 4 of the front illuminator 3 is lighted on by a control circuit. When the surroundings are lightened or the rider gets off, the control circuit puts the light source 4 off automatically by the signals of the first and second detecting means 5, 6. The time for lighting on and off can be thus saved as well as the sudden change of the circumferential lightness such as in a tunnel can be instantaneously corresponded to.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a headlight control device for a vehicle.

[Prior art and its issues to be solved] Conventionally, vehicle headlights were turned on and off by the driver or others by operating a switch, but it was troublesome to operate them each time while driving. Met. Especially when riding a bicycle, it is difficult to turn the lights on and off while driving.

In addition, it is easy to forget to turn on or turn off the headlights, and the battery may be wasted if the headlights are left unturned. Therefore, in order to prevent the driver from forgetting to turn off the headlights, devices have been developed that emit a warning sound to alert the driver if the driver gets out of the car with the headlights on. It was pointless and did not provide a fundamental solution.

[Object of the Invention] An object of the present invention is to automatically turn on the headlights when the surroundings become dark and the driver gets into the vehicle, and when the driver gets out of the car or when the surroundings become dark. To provide a headlight control device for a vehicle that automatically turns off headlights when it becomes bright.

[Means for Solving the Problems] The present invention is characterized by a first detection means for detecting the presence or absence of a driver, a second detection means for detecting surrounding brightness, and the first and second detection means for detecting the presence or absence of a driver. when the second detection means detects that the surroundings have become a certain level of darkness and the first detection means detects that a driver is present, the headlights are turned on. It is equipped with a control circuit that turns on the light.

[Operation] When the surrounding area becomes darker than a certain level of illuminance, the second detection means for detecting brightness and darkness senses this and puts the control circuit into an operating state. Furthermore, when the first detection means for detecting the presence or absence of a driver detects the presence of a driver, it acts on the control circuit to automatically turn on the headlights.

When the driver gets off the vehicle, the first detection means operates, and when the surroundings become bright, the second detection means operates, causing the control circuit to automatically turn off the headlights.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, as shown in FIG. 1, a headlamp 3 is installed on a mounting portion 2 provided at the front lower part of a bicycle frame 1. Further, as shown in FIG. 2, an infrared sensor 5 as a first detection means is attached to the rear of the cover 7 of the headlamp 3, and a CdS element 6 as a second detection means is attached above the infrared sensor 5. The sensor 5 detects the infrared rays emitted by the driver, Cd
This allows the S element 6 to sense the surrounding brightness.

Further, a light source 4 is installed in the front part of the headlamp 3.

To explain the structure of the headlamp control device in detail, as shown in FIG. CdS
Element 6 is connected. Note that in this embodiment, the control circuit 8
is composed of a sensor detection circuit 9 and a transistor Tr.

Next, the operation of the headlamp control device in this embodiment will be explained.

First, when the surrounding area becomes darker than a certain illuminance, CdS
Element 6 senses this and activates control circuit 8. When the driver gets in the vehicle, the infrared sensor 5 detects infrared rays emitted from the human body, and the sensor detection circuit 9 of the control circuit 8 is activated, and a bias voltage is applied to the base of the transistor Tr. Then, the transistor Tr is turned on and the light source 4 is turned on.

When the rider gets off the bicycle, the infrared sensor 5 reacts and acts on the control circuit 8, turning off the transistor Tr and turning off the light source 4.

Further, when the surrounding area becomes brighter than a certain illuminance, the CdS element 6 keeps the control circuit 8 in an inactive state, the transistor Tr is kept in an off state, and the light source 4 is turned off.

In this embodiment, the infrared sensor 55 is used as the first detection means, but any means may be used as long as it can detect the presence or absence of the driver.For example, it may detect the weight of the driver. Various methods are possible, such as installing the means on the seat.

Similarly, it is not necessary to use the CdS element 6 for the second detection means, and any device may be used as long as it can detect the surrounding brightness. The reference brightness may be determined depending on the method used.

In addition, as the control circuit 8, one constructed of a sensor detection circuit 9 and a transistor Tr was used;
and the light source 4 from the battery E by the action of the second detection means.
Any circuit may be used as long as it can control the current flowing into the circuit.

The first and second detection means do not need to be attached to the headlight body; for example, in a car, it is possible to attach the first detection means to the instrument panel and the second detection means to the outside of the body. be. The first detection means can be installed anywhere as long as it can detect the presence or absence of a driver, and the second detection means can detect the surrounding brightness.The installation position can be set as appropriate depending on the vehicle. It is.

[Effects] According to the headlamp control device according to the present invention as described below,
When the surroundings become dark and the driver gets on the vehicle, the headlights automatically turn on, and when the surroundings become brighter or the driver gets out of the vehicle, the headlights automatically turn off, which is very convenient as it saves the time and effort of operating a switch. There is no need to worry about headlights while driving.

In addition, since the light always turns on when it is needed and turns off when it is not needed, there is no need to forget to turn it on or turn it off, and you can immediately respond to situations where the brightness of the surrounding area suddenly changes due to a tunnel coming up.

[Brief explanation of the drawing]

FIG. 1 is a side view of an example in which a headlamp control device according to the present invention is attached to a bicycle, FIG. 2 is a perspective view of the headlamp, and FIG. 3 is a wiring diagram thereof. 3. - Headlamp, 4... Light source, - First detection means (infrared sensor), - Second detection means (CdS element), - Control circuit. Applicant Seikosha Co., Ltd.

Claims (4)

[Claims] (1) A first detection means for detecting the presence or absence of a driver, a second detection means for detecting surrounding brightness, and the first and second detection means are connected, and the second detection means is connected to the first detection means for detecting the presence or absence of a driver.
a control circuit that turns on the headlights when the detection means detects that the surroundings have become a certain darkness and the first detection means detects that there is a driver; A vehicle headlight control device characterized by: (2) A headlight control device for a vehicle according to claim 1, wherein the vehicle is a bicycle. (3) The vehicle headlamp control device according to claim 2, wherein the first and second detection means are provided in a headlamp attached to a part of the frame of the bicycle. (4) The headlight control device for a vehicle according to claim 1, wherein the vehicle is an automobile.