JPH0619921B2 - Vehicle lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a lamp mounted on a vehicle such as an automobile, and more specifically, by providing a rotating auxiliary reflecting mirror, it is possible to match the traveling conditions of the automobile. The present invention relates to a variable light distribution characteristic.

<< Prior Art >> As a conventional vehicular lamp having a movable auxiliary reflecting mirror of this type, there is one disclosed in Japanese Patent Application Laid-Open No. 62-115604, in which the auxiliary reflecting mirror is rotated as necessary. Therefore, the function of the cornering lamp is exerted by expanding the beam in either the left or right direction.

<< Problems to be Solved by the Invention >> However, although the above-described conventional vehicle lighting device functions as an auxiliary light such as a cornering lamp, it cannot support all driving conditions of an automobile, and For this reason, this type of vehicle lamp has to be provided as an auxiliary headlight in addition to the original headlight, which causes a problem that the effect is small in proportion to the complexity of the structure. .

<< Means for Solving Problems >> The present invention provides a main reflecting mirror, an auxiliary reflecting mirror, a light source, the main reflecting mirror, and an auxiliary as concrete means for solving the above-mentioned problems that occur in the related art. A vehicular lamp having a reflecting mirror and a lens arranged in front of a light source, wherein the auxiliary reflecting mirror has one reflecting surface divided into two parts by a vertical line passing through an optical axis,
Each optical axis is rotatably supported on the front surface of the main reflecting mirror by a vertical rotation axis so that the optical axis is tilted in the horizontal direction, and the respective focal points of the main reflecting mirror and the auxiliary reflecting mirror are the light source or A vehicle lamp characterized in that a lens cut having a wide diffusion angle is provided at an abutting position of an optical axis which is located in the vicinity thereof and is tilted by rotation of the auxiliary reflecting mirror of the lens. Thus, for example, it is possible to realize a vehicular lamp that can be used as a headlamp having a light distribution characteristic corresponding to high-speed traveling and low-speed traveling, and solve the problems occurring in the conventional ones.

<< Example >> Next, the present invention will be described in detail based on an example shown in the drawings.

Reference numeral 1 in FIG. 1 is a vehicular lamp of the present invention showing a main part in a supine state. The vehicular lamp 1 is a light source 2 such as a halogen lamp and a filament 2 of the light source 2.
There is a main reflecting mirror 3 formed as, for example, a paraboloid of revolution by a known means with a or a vicinity thereof as a focal point, and a lens 4 is provided in front of this main reflecting mirror 3. However, according to the present invention, the pair of auxiliary reflecting mirrors 5 and 6 are provided close to the front surface of the main reflecting mirror 3 in the vehicle lamp 1.

The auxiliary reflecting mirrors 5 and 6 will be described in more detail below. The auxiliary reflecting mirrors 5 and 6 pass through the optical axis of a single paraboloid of revolution whose focal point is the filament 2a of the light source 2 or its vicinity. The auxiliary reflecting mirrors 5 and 6 are provided with rotating shafts 5a and 6a perpendicular to the vehicular lamp 1, respectively.
The gears a and 6a are connected by gears 5b and 6b having the same ratio so that they rotate in opposite directions. By doing so, by rotating the gears 5b and 6b, the auxiliary reflecting mirrors 5 and 6 are turned inward in a substantially C-shape from the reference state in which they form one paraboloid of rotation. It will rotate to the state.

Next, the operation of the present invention will be described. FIG. 2 and FIG. 3 show the state of rotation described above. FIG. 2 shows the position of the reference state and the auxiliary reflecting mirrors 5 and 6 are in close contact with each other. In this state, a single paraboloid of revolution is formed, and at this time, the focus position of the paraboloid of revolution formed by the auxiliary reflecting mirrors 5 and 6 is set to the same position as that of the main reflecting mirror 3. As a result, the reflected light from the filament 2a becomes completely equivalent to that from the main reflecting mirror 3, and the auxiliary reflecting mirrors 5 and 6 are substantially absent, so that the normal reflecting light from the main reflecting mirror 3 alone is present. It is completely equivalent to a vehicle lamp.

FIG. 3 shows a state in which the auxiliary reflecting mirrors 5 and 6 are rotated. As described above, the light reflected from the auxiliary reflecting mirrors 5 and 6 is formed into a substantially V shape by the horizontal rotation. Each of them is directed inward, intersects in front of the vehicular lamp 1, and spreads horizontally to the left and right.

Here, the position where the reflected light from the auxiliary reflecting mirrors 5 and 6 comes into contact with the lens 4 changes between the reference position of the auxiliary reflecting mirrors 5 and 6 and the rotated position. The lens cut 4a applied to the lens 4 by utilizing the change in the position is also changed correspondingly.

If the above is described more concretely by using the vehicle lamp 1 as a headlight, as shown in FIG. 1, the auxiliary reflecting mirrors 5 and 6 are main reflecting mirrors 3 for passing beams.
It is provided in the upper half of the vehicle and is used as the reference position shown in Fig. 2 when traveling at high speeds on highways, suburbs, etc. At this time, for example, in order to irradiate as far away as possible according to relevant regulations, etc. The lens cut 4ai at the position where the reflected light from the auxiliary reflecting mirrors 5 and 6 in the standard position comes into contact has a low degree of diffusion, and the light distribution characteristics of the vehicular lamp 1 at this time are shown in FIG. As shown by the light curve N, it has a spot shape with a relatively narrow width. On the other hand, when traveling at a low speed in an urban area, the auxiliary reflecting mirror 5,
6 is the rotation position shown in FIG. 3, and the auxiliary reflecting mirror 5,
The lens cut 4aii at the position where the reflected light from 6 comes into contact has a high degree of diffusion, and its light distribution characteristic is shown in FIG. 5 in combination with the action of expanding the auxiliary reflecting mirrors 5 and 6 in the horizontal direction as described above. As shown by the light distribution curve W, it becomes easy to confirm a wide shoulder or the like.

The basic characteristics of the vehicular lamp 1 as a headlight, for example, are determined only by the main reflecting mirror 3, and the extent to which the above-described actions and effects occur is the main reflecting mirror 3 and the auxiliary reflecting mirror 5, The size of the auxiliary reflecting mirrors 5 and 6 is determined according to the expected degree of operation or the degree allowed by the relevant laws and regulations because the area ratio of the auxiliary reflecting mirrors 6 and 6 can be freely adjusted. It is preferable.

FIG. 6 shows another embodiment of the present invention. Instead of the gears 5b and 6b, driving means 5c and 6c such as stepping motors are attached, whereby the auxiliary reflecting mirrors 5 and 6 are respectively attached. Are individually rotatable. By doing so, for example, as in the previous embodiment, the vehicle lamp 1 is being used as a headlight, and when measuring a turn, it is on the opposite side of the turning direction, that is, on the right side when turning to the left. By rotating only the auxiliary reflecting mirror 6,
The light distribution characteristic of the vehicular lamp 1 is such that the turning direction is widely radiated as shown by a light distribution curve L in FIG. 7, and the function of a cornering lamp can be obtained without using auxiliary lights. By driving the driving means 5c and 6c in the same manner as described in the previous embodiment, the same operation as in the previous embodiment can be obtained.

Note that this embodiment is exactly the same as the previous embodiment except for the parts described above, and thus detailed description thereof is omitted here.

<< Effects of the Invention >> As described above, according to the present invention, a pair of auxiliary reflecting mirrors, each of which has a reflecting surface divided by a vertical line passing through the optical axis, is rotatably provided on the front surface of the main reflecting mirror. A reference position where the auxiliary reflecting mirror forms one reflecting surface by making a lens cut corresponding to this tilt at the contact position of the reflected light that is tilted and changes along the horizontal direction due to the rotation. In this case, it can be used as an ordinary vehicle lamp, and by rotating both or one of the auxiliary reflecting mirrors as necessary, various light distributions such as for high speed traveling, low speed traveling or turning can be obtained. The characteristics can be obtained without providing an auxiliary light, etc., and the visibility during driving is enhanced, and the safety is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an essential part of an embodiment of a vehicular lamp according to the present invention, FIG. 2 and FIG. 3 are explanatory views for explaining an operation state of the same embodiment, FIG. 4, and FIG. Is a graph showing a light distribution characteristic, FIG. 6 is a perspective view showing another embodiment of the present invention, and FIG. 7 is a graph showing a light distribution characteristic of the embodiment shown in FIG. 1 ... Vehicle lamp 2 ... Light source 2a ... Filament 3 ... Main reflecting mirror 4 ... Lens 4a ... Lens cut 5,6 ... Auxiliary reflecting mirrors 5a, 6a ... Rotating shafts 5b, 6b ... Gears 5c, 6c ... Drive means

Claims (2)

[Claims] 1. A vehicular lamp having a main reflecting mirror, an auxiliary reflecting mirror, a light source, and a lens arranged in front of the main reflecting mirror, the auxiliary reflecting mirror, and the light source, wherein the auxiliary reflecting mirror is one-sided reflection. The surface is divided into two parts by a vertical line passing through the optical axis, and is rotatably supported on the front surface of the main reflecting mirror by a vertical turning axis so that each optical axis is tilted in the horizontal direction. The respective focal points of the auxiliary reflecting mirror are located at the light source or in the vicinity thereof, and a lens cut with a wide diffusion angle is provided at the contact position of the optical axis of the lens tilted by the rotation of the auxiliary reflecting mirror. A vehicular lamp characterized in that 2. The auxiliary reflecting mirrors are supported by rotating shafts connected to each other by gears of equal ratio so as to rotate in reverse, respectively. The vehicle lamp according to item (1).