JP3891253B2 - Vehicle lighting - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp, and more specifically, a vehicular lamp configuration that can be formed thinly with a reduced amount of light loss, which can be matched with a recent backward bent body design. It is intended to provide.
[0002]
[Prior art]
2 and 3 show an example of the configuration of this type of conventional vehicular lamp. First, in the vehicular lamp 80 shown in FIG. 2, the entire rear surface of the front lens 81 having a strongly bent back shape is shown. For example, a reflecting mirror 82 having a paraboloid of revolution is provided. By doing so, the depth dimension D1 of the vehicular lamp 80 is inevitably large, and there is a high possibility of interference with other parts arranged in the engine room.
[0003]
Further, the vehicular lamp 90 shown in FIG. 3 is made to solve the above-described interference problem, and by providing a reflecting mirror 92 on a part of the back surface of the front lens 91, the depth dimension D2 is reduced. Is intended. And the decoration plate 93 is provided in the back surface of the front lens 91 used as the part in which the reflecting mirror 92 is not provided, and the inside of the vehicle lamp 90 is prevented from seeing through. In FIG. 2 and FIG. 3, reference numeral 84 denotes a light source such as an incandescent bulb.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional vehicular lamps 80 and 90, first, in the vehicular lamp 80 shown in FIG. 2, as described above, the depth dimension D1 becomes large and greatly protrudes into the engine room. There is a significant interference with other parts, which causes a problem that impairs the effective space of the engine room.
[0005]
Further, in the vehicular lamp 90 shown in FIG. 3, the depth dimension D2 can be surely reduced, but on the other hand, the decorative plate 93 does not emit light when the vehicular lamp 90 is turned on and the appearance of the entire vehicle is impaired. At the same time, the size of the reflecting mirror 92 is reduced, so that the amount of light is reduced and the performance is degraded.
[0006]
[Means for Solving the Problems]
As a specific means for solving the above-described conventional problems, the present invention is provided with a light source, covering substantially the front of the light source, the light source as a first focal point, and a long axis substantially orthogonal to the irradiation axis of the lamp. A first reflecting surface that is elliptical; a second reflecting surface that is a parabolic system with the second focal point of the first reflecting surface as a focal point and an axis substantially parallel to the irradiation axis; the light source and the second A third reflection formed between the reflecting surface and the light source as a focal point, and formed as a shape that shields the incidence of direct light from the light source on the second reflecting surface, and a parabolic system whose axis coincides with the irradiation axis The object is solved by providing a vehicular lamp characterized in that a half of the reflecting surface is formed from the surface.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Below, this invention is demonstrated in detail based on embodiment shown in a figure. 1 is a vehicular lamp according to the present invention. The vehicular lamp 1 is, for example, a front turn signal lamp or the like, and a front lens 2 bent backward (slant) in accordance with the vehicle design is provided. The point adopted is the same as that of the conventional example.
[0008]
Here, in the present invention, the vehicular lamp 1 includes a light source 3, a first reflecting surface 4, a second reflecting surface 5, a third reflecting surface 6, a fourth reflecting surface 7, and a fifth reflecting surface group 8. First, the first reflecting surface 4 is formed as an elliptical system such as a spheroid that covers the light source 3 from the front and has the light source 3 as a first focal point f1. In the description of the present invention, an axis that passes through the light source 3 and faces the irradiation direction of the vehicular lamp 1 will be described as an irradiation axis X.
[0009]
The first reflecting surface 4 is formed such that the major axis Y is substantially perpendicular to the irradiation axis X in the mounting state of the vehicular lamp 1 on the vehicle, and the second focal point f2 is It is assumed to exist below the first focal point f1. In actual implementation, the major axis Y can be appropriately rotated and tilted around the irradiation axis X in accordance with the design of the vehicle.
[0010]
The second reflecting surface 5 is formed as a parabolic reflecting surface such as a rotating paraboloid focusing on the second focal point f2 of the first reflecting surface 4. At this time, the axis Z is It is formed substantially parallel to the irradiation axis X. In forming the second reflecting surface 5, the second reflecting surface 5 is basically provided within the range of the light beam reflected by the first reflecting surface 4.
[0011]
The third reflecting surface 6 is a parabolic reflecting surface such as a rotating paraboloid with the light source 3 as a focal point, and thus its axis is an irradiation axis X. Here, the third reflecting surface 6 also has a shielding function for preventing direct light from the light source 3 from entering the second reflecting surface 5, that is, preventing light from a direction other than the focus from entering. In order to perform this function, the focal length is set to be short, and is projected above the second reflecting surface 5 to achieve the purpose.
[0012]
In the present invention, in addition, a fourth reflecting surface 7 and a fifth reflecting surface 8 are provided as required. First, the fourth reflecting surface 7 is connected to the outer peripheral side of the second reflecting surface 5. And a parabolic system such as a rotating paraboloid with the light source 3 as a focal point and an irradiation axis X as an axis. The fourth reflecting surface 7 is provided as necessary when the second reflecting surface 5 and the third reflecting surface 6 are not sufficient to fill the back surface of the front lens 2. It is what
[0013]
Here, when examining the form of the vehicular lamp 1 of the present invention described above, the third reflecting surface 6 and the fourth reflecting surface 7 are parabolic systems provided below the light source 3. The first reflecting surface 4 is an elliptical reflecting surface having a second focal point f2 below, and the second reflecting surface 5 is a parabolic system having the second focal point f2 of the first reflecting surface 4 as a focal point. Therefore, when the light source 3 is turned on, the vehicular lamp 1 mainly emits light at a half portion below the irradiation axis X.
[0014]
Therefore, in the present invention, the fifth reflecting surface group 8 is provided in the upper half, and this fifth reflecting surface group 8 is a set of parabolic reflecting surfaces having the light source 3 as a focal point. In this embodiment, in order to make the description concrete and easy to understand, an example will be described in which the above-described reflecting surface is composed of three surfaces 8a, 8b and 8c.
[0015]
Each of the reflecting surfaces constituting the fifth reflecting surface group 8 has a focal length of reflecting surface 8a <reflecting surface 8b <reflecting surface 8c, and each of the reflecting surfaces 8a to 8c has a reflecting surface 8a < The reflecting surface 8b <the reflecting surface 8c is set, and the reflecting surfaces 8a to 8c are connected to each other by the connecting portion 9 in a substantially concentric manner when the vehicular lamp 1 is viewed from the front.
[0016]
Further, the connection portion 9 is provided with an opening 9a so that the light from the light source 3 reaches each of the reflection surfaces 8a to 8c. Accordingly, the fifth reflecting surface group 8 is configured such that the light beam is incident on the reflecting surface having a shorter focal length as the light beam is closer to the right angle with respect to the irradiation axis X of the light from the light source 3.
Here, a preferable configuration when the fifth reflecting surface group 8 or the first reflecting surface 4 and the fifth reflecting surface group 8 are integrally formed will be described. As described above, the fifth reflecting surface group 8 is connected to each other, that is, the connecting portion 9 that connects the reflecting surfaces 8a to 8c must be provided with an opening. In addition, it is necessary to provide an opening 4a in a part of the first reflecting surface 4 in order to make light incident on the reflecting surface 8a.
[0018]
At this time, the fifth reflecting surface group 8 and the connecting portion 9 or the first reflecting surface 4, the fifth reflecting surface group 8 and the connecting portion 9 are integrally formed of a transparent member such as a transparent resin, and the opening portion. Except for the portions 4a and 9a, if the reflective film 10 is formed by aluminum vapor deposition or the like and the reflection treatment is performed, the first reflective surface 4, the fifth reflective surface group 8, and the connecting portion 9 are formed in two steps of molding and vapor deposition. Thus, the openings 4a and 9a are formed, and the process can be simplified.
[0019]
In particular, since the back surface of the first reflecting surface 4 is on the front lens 2 side, for example, if it is formed of a metal member or the like, the back surface of the first reflecting surface 4 that can be seen from the outside through the front lens is also something. Although the decorative treatment is inevitably performed, when the transparent member is formed in this way, the reflective film 10 forming the reflective surface of the first reflective surface 4 can be seen through from the back, and the decorative treatment described above is performed. Is no longer needed.
[0020]
In addition, when the first reflecting surface 4, the fifth reflecting surface group 8, the connection portion 9 and the like are formed of a transparent member, the shape of the surface on which the reflecting film 10 is applied should be set as a required shape. Even when the reflective film 10 directly reflects light, or when the reflective film 10 reflects light through a transparent member, the characteristics of the vehicle lamp 1 are not much. There is no difference.
[0021]
Next, the function and effect of the vehicular lamp 1 having the above-described configuration will be described. According to the present invention, light radiated forward from the light source 3 that was not used in the configuration of the conventional vehicle lamp is collected by the first reflecting surface 4 and directed to the irradiation direction by the second reflecting surface 5. As a result, in the vehicular lamp 1 of the present invention, the luminous flux utilization factor for the light source 3 is improved.
[0022]
Therefore, the depth dimension of the vehicular lamp 1 in combination with the reflecting surface 3 and the reflecting surface 4 having a depth dimension that does not cover the entire rear surface of the front lens 2 and the fifth reflecting surface group 8 having an irregular configuration. Even when the length of the front lens 2 is shortened, the amount of light is not reduced, and at the same time, light emission over the entire area of the front lens 2 is enabled.
[0023]
【The invention's effect】
As described above, according to the present invention, the light source and the first reflection that is substantially elliptical with the light source as the first focal point and the long axis substantially orthogonal to the illumination axis of the lamp are covered. Provided between the light source and the second reflecting surface, and a second reflecting surface having a parabolic system whose focal point is the second focal point of the first reflecting surface and whose axis is substantially parallel to the irradiation axis. A half part of the reflecting surface from the third reflecting surface which is formed in a shape that shields the incidence of direct light from the light source on the second reflecting surface with the light source as a focal point and has a parabolic system whose axis coincides with the irradiation axis With the vehicular lamp configured as above, the first reflecting surface that collects light in a range not conventionally used and the second reflecting surface that uses the collected light as irradiation light are used for the vehicle. As a means to reinforce the light intensity of the lamp, a reflective surface with a shallow depth dimension that reduces efficiency, or a light emitting surface It is possible to realize a vehicular lamp that emits light from the entire surface of the front lens so that it does not cause a shortage of light even when combined with the fifth reflecting surface group, etc. This has an extremely excellent effect in improving the aesthetics of the vehicular lamp.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a vehicular lamp according to the present invention.
FIG. 2 is a cross-sectional view showing a conventional example.
FIG. 3 is a cross-sectional view showing another conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp 2 ... Front lens 3 ... Light source 4 ... 1st reflective surface 4a ... Opening part 5 ... 2nd reflective surface 6 ... 3rd reflective surface 7 ... 4th reflective surface 8 ... ... Fifth reflecting surface group 8a to 8c ... reflecting surface 9 ... connecting portion 9a ... opening 10 ... reflecting film

Claims (4)

A light source, a first reflection surface that covers substantially the front of the light source, has the light source as a first focal point, and has a long axis substantially orthogonal to the irradiation axis of the lamp, and an elliptical system; and a first reflection surface of the first reflection surface A second reflecting surface having a parabolic system with a bifocal point as a focal point and an axis substantially parallel to the irradiation axis, and the second reflecting surface provided between the light source and the second reflecting surface. A vehicle is characterized in that a half of the reflecting surface is formed from a third reflecting surface formed as a shape that shields the incidence of direct light from the light source and having a parabolic system whose axis coincides with the irradiation axis. Lamps. The fourth reflecting surface according to claim 1, wherein a parabolic system having the light source as a focal point is provided on the outer side in the circumferential direction of the second reflecting surface, and a fourth reflecting surface having an axis coinciding with the irradiation axis is provided. Vehicle lamp. A parabolic system in which the second half of the first reflecting surface of the reflecting surface is opposite to the half on which the second focal point is provided, and the different axes of the focal length are aligned with the irradiation axis so as not to cause interference. A plurality of fifth reflecting surface groups are provided, and the fifth reflecting surface group is configured such that light is incident on the reflecting surface having a shorter focal length as the light beam is perpendicular to the irradiation axis of the light from the light source. The vehicular lamp according to claim 1 or 2, wherein the vehicular lamp is arranged. 2. The first reflective surface to the fifth reflective surface group, wherein at least the first reflective surface and the fifth reflective surface group are formed of a transparent member, and a reflection process is performed on a necessary portion. The vehicle lamp according to any one of claims 3 to 4.

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