JP2827420B2 - Vehicle lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a multi-stage annular reflecting surface element having a reflecting surface having the same or common focal point at or near a filament of a light source bulb and having different focal lengths. More particularly, the present invention relates to a vehicle lamp that can more effectively use a reflection surface.

[Prior Art] A conventional vehicle lamp of this type will be described below with reference to FIGS. 6 to 10. FIG.

In the figure, reference numeral 1 denotes a housing, and the housing 1 has an opening on a front surface and a vertically long rectangular shape when viewed from the front surface. A front lens (not shown) is provided in a front opening of the housing 1. This front lens and the housing 1
A light room is defined by the above.

2 is a light source bulb. The light source bulb 2 is removably attached to the center of the bottom of the housing 1 so that the light source bulb 2 is disposed in the lamp chamber, and the filament 20 of the light source bulb 2 has a multi-stage annular rotary release described later. It is located near the same and common focal point F of the reflecting surface element 31 composed of the object surface.

Reference numeral 3 denotes a reflecting surface provided on the front side of the bottom of the housing 1. The reflecting surface 3 is a filament 20 of the light source bulb 2.
The center or the vicinity thereof is the same and common focal point F,
And multistage annular reflecting surface elements having different focal lengths
It consists of 31. In this example, an optical axis Z-
Reflective surface element 31 composed of an annular paraboloid of revolution repelling Z
Are provided in multiple stages.

FIG. 7 is a schematic diagram showing the configuration of the above-mentioned reflecting surface 3 in a conventional vehicular lamp.

In the drawing, reference numeral 30 denotes a parabolic base line of the reflecting surface 3 (hereinafter simply referred to as a parabolic base line) set for convenience, ZZ denotes an optical axis of the light source bulb 2 (that is, a vehicle lamp), and O denotes an optical axis. It is the origin of the parabolic base line 30 with the optical axis ZZ as the vertical axis. D is a radius from the optical axis ZZ of one of the multi-stage reflecting surface elements 31 from the optical axis ZZ. In this example, the parabolic base line 30 of the one reflecting surface element 31 from the optical axis ZZ. Indicates the distance to the rising point of. θ is the one reflecting surface element
At an inclination angle of 31, in this example, a parallel line passing through the rising point of the parabolic base line 30 of the one reflecting surface element 31 and parallel to the optical axis Z-Z is formed by the one reflecting surface element 31. Angle. H is the height of the one reflective surface element 31, which in this example is the distance from the vertex of the one reflective surface element 31 to the horizontal axis passing through the origin O and orthogonal to the optical axis ZZ.

FIG. 8 is a partial front view showing the reflection surface and the light source bulb, FIG. 9 is a development view taken along the line IX-IX in FIG. 8, and FIG. 10 is a sectional view taken along the line XX in FIG.

In the figure, A, B and C are the same annular paraboloidal reflective surface elements 3
The vertices at 0, 270, and 315 of 1 are shown. As is clear from FIGS. 8 to 10, the inclination angle θ and the height H of the same reflecting surface element 31 are constant. Therefore, all the inclination angles and heights of the multi-stage reflecting surface elements 31 constituting the reflecting surface 3 are constant.

In such a conventional vehicle lamp, when the light source bulb 2 is turned on, light L1 from the light source bulb 2 is reflected by the reflection surface 3
And the reflected light L2 travels toward the front lens side in parallel with the optical axis Z-Z. As described above, the vehicular lamp in which the reflecting surface 3 is constituted by the multistage annular paraboloidal reflecting surface element 31 can reduce the thickness of the entire lamp.

[Problems to be Solved by the Invention] However, in the above-described vehicle lamp, all the inclination angles θ and the heights H of the multi-stage annular paraboloidal reflecting surface element 31 constituting the reflecting surface 3 are constant. is there. For this reason, the reflecting surface 3
There is a problem that the range in which the amount of light from the light source bulb 2 is effectively used is constant, as shown by a in FIG.

An object of the present invention is to provide a vehicular lamp capable of increasing the effective use range of a reflection surface more widely.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention is directed to changing the height and angle of a multi-stage annular reflecting surface element constituting a reflecting surface by setting light from a light source bulb in a predetermined direction. It is characterized by being continuously and continuously changed to be reflected.

[Operation] The present invention has the above-described configuration, and has a portion that does not affect the thickness of the entire lamp, for example, a substantially central portion of four sides of a vertically long vehicle lamp as viewed from the front, and a height of the reflecting surface element in this portion. When the height is raised, the range in which the amount of light from the light source bulb on the reflection surface is effectively used is increased by the rise. Therefore, the effective use range of the reflection surface can be increased more widely. In addition, when the height of the reflecting surface element at the corners of a vehicle lamp that is vertically long when viewed from the front, which affects the thickness of the entire lamp, is reduced, the thickness of the entire lamp is reduced by the reduced amount. can do. further,
Since the angle of the reflecting surface element is continuously and continuously changed so as to advance the reflected light in a predetermined direction, even if the height of the reflecting surface element is also continuously and continuously changed, the vehicular lamp is used. There is no possibility that the original function of the reflecting surface is impaired.

[Embodiment] Hereinafter, an embodiment of a vehicular lamp of the present invention will be described with reference to FIGS. 1 to 5.

In the drawings, the same reference numerals as those in FIGS. 6 to 10 denote the same components.

In the figure, reference numeral 4 denotes a reflecting surface provided on the front side of the bottom of the housing 1. The reflecting surface 4 has the same or a common focal point F at or near the center of the filament 20 of the light source bulb 2, and each has a focal length. It comprises a plurality of different annular reflecting surface elements 41. In this example, the reflection surface element 41 composed of an annular paraboloid of revolution is provided in multiple stages. The height and angle of the reflecting surface element 41 composed of the multistage annular paraboloid of revolution are continuously and continuously changed so that the light L1 from the light source bulb 2 is to be reflected in a predetermined direction. In other words, in the same annular paraboloidal reflecting surface element 41, four angles of 0 °, 90 ° 180 °, and 270 ° corresponding to the center of four sides of the vertically long lamp (housing 1) when viewed from the front. 45 ゜, 135 ゜, 225 corresponding to the four corners of the lamp by increasing the height H1 of the location
The height H2 at four locations of {, 315} is reduced. In addition, in the same annular paraboloidal reflecting surface element 41, the reflecting surface element 41 is configured to reflect the light L1 from the light source bulb 2 in a predetermined direction, that is, in parallel with the optical axis ZZ. The tilt angle,
The inclination angle θ1 (small) of the reflective surface element 41 in the portion where the height H1 is high
From the inclination angle θ2 of the reflection surface element 41 in the portion where the height H2 is low.
It is continuously and continuously changed to (large).

Since the vehicle lamp of the present invention in this embodiment has the above-described configuration, when the light source bulb 2 is turned on, the light L1 from the light source bulb 2 is reflected by the multi-stage reflecting surface element 41 constituting the reflecting surface 4. Reflected light parallel to the optical axis Z-Z direction
L2 advances to the front lens side.

Thus, of the multi-stage reflecting surface element 41 constituting the reflecting surface 4, a portion which does not affect the thickness of the entire lamp, in this example, the height of the center of the four sides of the vertically elongated housing 1 as viewed from the front Since H1 is increased, as shown in FIG. 2, the range in which the amount of light from the light source bulb 2 on the reflecting surface 4 is effectively used is based on the reflecting surface (indicated by a two-dot chain line) 3 of the conventional vehicle lamp. With respect to the range A, the height H1 of the reflection surface element 41 is further increased, and the range shown by B is expanded.

Further, of the multi-stage reflecting surface element 41 constituting the reflecting surface 4, a portion that affects the thickness of the entire lamp, in this example, the height H2 of the four corners of the vertically long housing 1 as viewed from the front.
As shown in FIG. 1, the rise of the reflection surface 4 of the present invention is a conventional reflection surface (shown by a two-dot chain line) as shown in FIG.
3 can be made equal to or smaller than the rise of the lamp 3, and the thickness of the entire lamp can be further reduced accordingly.

Further, since the heights of the multi-stage reflecting surface elements 41 constituting the reflecting surface 4 are continuously changed in a stepless manner, there is no possibility that a shadow is generated due to the step.

In addition, the inclination angle of the multi-stage reflecting surface element 41 constituting the reflecting surface 4 is continuously changed stepwise so that the reflected light L2 travels in a predetermined direction. Even if the height of the surface element 41 is continuously and continuously changed, there is no possibility that the original function of the reflecting surface 4 of the vehicular lamp is impaired.

In the above-described embodiment, the vehicle lamp that is vertically long when viewed from the front is described, but the invention is not particularly limited to this example.

[Effects of the Invention] As is clear from the above, the vehicle lamp of the present invention reflects the height and angle of the multi-stage annular reflecting surface element constituting the reflecting surface by reflecting the light from the light source bulb in a predetermined direction. Since the height of the reflective surface element at a location that does not affect the overall thickness of the lamp is raised, the light source bulb on the reflective surface is proportional to the rise. Thus, the range in which the amount of light from the light source is effectively used is increased.
Therefore, the effective use range of the reflection surface can be increased more widely. In addition, when the height of the reflection surface element at a location that affects the thickness of the entire lamp is reduced, the thickness of the entire lamp can be reduced by the reduced amount. Further, since the angle of the reflecting surface element is changed so that the reflected light is advanced in a predetermined direction, even if the height of the reflecting surface element is changed, there is no possibility that the original function of the reflecting surface is impaired. .

[Brief description of the drawings]

1 to 5 show an embodiment of a vehicular lamp according to the present invention. FIG. 1 is a perspective view showing a state in which a front lens is removed.
FIG. 3 is an explanatory view showing the effective use of the amount of light from the light source bulb on the reflection surface, FIG. 3 is a partial front view showing the reflection surface and the light source bulb, and FIG. 4 is an IV-IV line development in FIG. FIG. 5 is a sectional view taken along line V1-V1 in FIG.
It is explanatory drawing which combined the cross section of the line. 6 to 10 show a conventional vehicular lamp, FIG. 6 is a perspective view showing a state in which a front lens is removed, FIG. 7 is a schematic diagram showing the structure, and FIG. 8 is a reflection surface and a light source bulb. FIG. 9 is a development view taken along the line IX-IX in FIG. 8,
FIG. 10 is a sectional view taken along line XX in FIG. 1 ... housing, 2 ... light source bulb, 20 ... filament, 4 ... reflection surface, 41 ... reflection surface element, F ... focus.

Claims (1)

(57) [Claims] 1. A vehicular lamp in which a reflecting surface has a filament of a light source bulb or a vicinity thereof at the same focal point and is constituted by a multi-stage annular reflecting surface element having different focal lengths, wherein the multi-stage annular reflection is provided. A vehicular lamp wherein the height and angle of a surface element are continuously and continuously changed so that light from the light source bulb is to be reflected in a predetermined direction.