JP2001236804A - Vehicle lamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems of a conventional vehicle lamp device, where it is impossible to achieve unique design by changing the appearance, and thus not easy to incite demand, and in addition difficult to improve the performance. SOLUTION: A vehicle lamp device comprises a main barrel-shaped elliptic reflector 3 forming a rotary elliptic reflection surface with the first focus located in a light source 2, an auxiliary half barrel-shaped elliptic reflector 21 which abuts the main barrel-shaped elliptic reflector, an auxiliary barrel-shaped reflector 11 abutting the auxiliary half barrel-shaped elliptic reflector, a first reflector 4 with a focus located in the second focus of the auxiliary barrel-shaped elliptic reflector 11, the second reflector 5 with a focus located in the light source 2, and a lens 6 with the focus located in the first focus of the auxiliary barrel- shaped elliptic reflector 21. This sets light distribution properties of the light distribution surface to be designed freely, the design to have a plurality of light-emitting points by a plurality of reflection surfaces and projection lenses, as and the vehicle lamp device to have a large surface, thus resulting in a unique design.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp, and more particularly to a headlamp for a vehicle such as a headlamp and a fog lamp, and a signal lamp for a vehicular tail lamp and a turn signal lamp. It is intended to be provided.

[0002]

2. Description of the Related Art FIGS. 8 to 10 show examples of the configuration of a conventional lamp of this type. First, in a lamp 90 shown in FIG. 8, a light source 91 is arranged at a focal position as a basic configuration. A parabolic reflector 92, and a lens 93 with a lens cut 93a. The parallel parabolic reflector 92 obtains parallel light reflected by the mirror 93 and converts the reflected light to a lens 93. The light is appropriately diffused by the cut 93a to obtain light distribution characteristics.

In the lamp 80 shown in FIG. 9, a parabola having the light source 81 as a focal point appears in a vertical section when the lamp 80 is mounted, and a straight line appears in a horizontal section (the state shown). It is composed of a composite reflection surface 82 in which a plurality of parabolic column reflection surfaces are composited, and a lens 83 which is not cut and is transparent, and the composite reflection surface 82 itself has a light distribution characteristic. What you get.

Further, in a lamp 70 shown in FIG. 10, an ellipsoidal reflecting surface 72 having a spheroidal reflecting surface, a compound elliptical surface, and an elliptical free-form surface having a light source 71 as a first focal point,
Irradiation light is obtained by enlarging and projecting the light source image generated by focusing on the second focal point with the aspherical lens 73, which is constituted by an aspherical lens 73 and a shade 74 provided as necessary. By covering unnecessary portions with the shade 74, a shape having a required light distribution characteristic is obtained. The lamp 70 of the type employing the elliptical reflection surface 72 is called a projector type.

[0005]

However, in the above-mentioned conventional structure, the structure of the lamp 90 shown in FIG. 8 requires a lens cut 93a having a high optical power, thereby making the lens 93 thick. The change in thickness becomes large, and as a result, the transparency deteriorates, and there is a problem that an appearance excellent in transparency and depth, which is currently preferred in the market, cannot be obtained.

[0006] In the lamp 80 shown in FIG.
Since the lens 83 is transparent without being subjected to lens cutting, an appearance with excellent transparency can be certainly obtained.
2, the light distribution characteristics are formed, so that there is a problem that the formation of the light distribution characteristics is restricted, for example, it is difficult to secure the lateral width of the light distribution characteristics.

Further, in the lamp 70 shown in FIG. 10, the depth becomes deep, which causes a problem of difficulty in installation and the like, and the outer diameter of the aspherical lens 73 becomes small. When adopted as a lamp, since the light emitting area is small, there arises a problem that visibility from an oncoming vehicle is inferior.

[0008] In addition, the lamps 70 to 90 having the above-mentioned conventional configuration.
Are widely adopted, it is difficult to differentiate from others, it is difficult to obtain novelty in terms of design, and in the above-described conventional lamps 70 to 90, the luminous flux Since the utilization rate depends on the depth, there is also a problem that the efficiency is reduced when the thickness is reduced due to the demand of the market or the like.

[0009]

According to the present invention, as a specific means for solving the above-mentioned conventional problems, there is provided a light source, and an inclined axis provided at a predetermined angle with respect to an irradiation axis of a lamp passing through the light source. Having a first and a second focal point on the main cylindrical elliptical reflecting surface, wherein the first focal point is arranged on the light source, a lens having a second focal point of the main cylindrical elliptical reflecting surface, A vehicle, comprising: one reflecting surface; and a second reflecting surface that focuses on the light source and reflects light not covered by the main cylindrical elliptical reflecting surface in the irradiation axis direction, of the light from the light source. The problem is solved by providing a lighting fixture.

Further, by adding a sub-cylindrical elliptical reflecting surface and a sub-half cylindrical elliptical reflecting surface to the above-mentioned vehicle lamp, the number of light emitting points can be increased and the surface area of the vehicle lamp can be increased. Therefore, it can be differentiated from the conventional vehicle lamp.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 shows a first embodiment of the present invention, and the one denoted by reference numeral 1 in the figure is a vehicle lamp according to the present invention. The vehicular lamp 1 basically includes a light source 2 such as an incandescent lamp, a discharge lamp, a light emitting diode, etc., a main cylindrical elliptical reflecting surface 3, a first reflecting surface 4, a second reflecting surface 5, a projection lens 6, and a front surface. And a lens 7.

In the first embodiment, the light source 2 uses an incandescent lamp having a light emitting source 2a in a filament.
In describing the present invention, a straight line passing through the light emitting source 2a of the light source 2 and extending in a direction in which the vehicle lamp 1 according to the present invention emits light is defined as an irradiation axis X, and a direction in which light is emitted is defined as an irradiation axis X direction. And Strictly speaking, arranging the focal point on the light source 2 means arranging the focal point on the light source 2a. When a discharge tube or an incandescent light bulb is selected as the light source 2, a double filament may be used. In this case, the light source 2 may be appropriately adjusted depending on the type of the light source 2, such as with reference to the center of a plurality of filaments. Is what is done.

First, the main cylindrical elliptical reflecting surface 3 basically passes through the light emitting source 2a and assumes an inclined axis Y inclined by 45 ° from the irradiation axis X. A single focal point 3a and a second focal point 3b are provided, and an inner surface of a spheroidal shape obtained by rotating an ellipse formed by the two focal points about the tilt axis Y is formed as a reflection surface. However, since it is impossible to input and output light as it is, substantially both ends are cut by a plane orthogonal to the tilt axis Y on the first and second focal points 3a and 3b of the spheroidal shape. It has a cylindrical shape. In the first embodiment, the inclination of the inclination axis Y from the irradiation axis X is set to 45 °, but any angle close to this may be used.

The main cylindrical ellipsoidal reflecting surface 3 formed in this manner moves the first focal point 3a while keeping the elliptical axis connecting the first focal point 3a and the second focal point 3b with the tilt axis Y. It is arranged by matching with the light emitting source 2a. By arranging the main cylindrical elliptical reflecting surface 3 in this manner, light from the light emitting source 2a is focused again on the second focal point 3b of the main cylindrical elliptical reflecting surface 3, and therefore, It can be considered that the pseudo light source 2b exists at the two focal points 3b.

Next, the first reflecting surface 4 is a parabolic reflecting surface whose focal point is on the second focal point 3b of the main cylindrical elliptical reflecting surface 3, and the light is reflected from the edge of the main cylindrical elliptical reflecting surface 3. Is formed on the side to be irradiated. In the first embodiment, the first reflecting surface 4 is a parabolic reflecting surface whose focal point is the second focal point 3b of the main cylindrical elliptical reflecting surface 3. However, the present invention is not limited thereto. It may be formed by a paraboloid of revolution, a convex reflection surface, a concave reflection surface, a free-form surface reflection surface, or a combination thereof, and the second focal point 3b is used as a focal point. It is only necessary that the light from the second focal point 3b can be reflected in an appropriate direction. The focal position is changed so that the light can be reflected not only in one direction but in a plurality of predetermined directions as necessary. It may be composed of a plurality of reflection surfaces.

On the irradiation axis X direction side of the second focal point 3b of the main cylindrical elliptical reflecting surface 3, a projection lens 6 which is a convex lens-shaped aspheric lens having the second focal point 3b as a focal point is arranged. Is what is done. By arranging the projection lens 6, this portion is approximated to a configuration called a projector system, and has a function as a lamp. Therefore, similar to the ordinary projector system, the light distribution characteristics can be easily controlled by arranging a light shielding plate (not shown) near the second focal point 3b. In addition, as the projection lens 6, a lens having a prism lens cut, a flute cut, a fish-eye cut, or the like may be used.

On the other hand, since the main cylindrical elliptical reflecting surface 3 has the above-mentioned shape and the elliptical axis is inclined at 45 ° with respect to the irradiation axis X, the light source 2a of the light source 2 is omnidirectional. It is not covered, so of the light of the light emitting source 2a,
A second reflecting surface 5 that reflects light in the direction of the irradiation axis X and has a focal point at the light emitting source 2a is provided at a position where light emitted from a portion not covered by the main cylindrical elliptical reflecting surface 3 is received. In this case, the meaning of the second reflecting surface 5 having the light emitting source 2a as the focal point is the same as that of the first reflecting surface described above, and the same shape of the reflecting surface can be used. .

Then, a prism cut is formed on the front surface of these reflecting surfaces so that desired light distribution characteristics can be obtained at necessary places.
By providing the front lens 7 having a lens cut 7a such as a flute cut and a fish-eye cut, the vehicle lamp 1 is provided.
Will be completed. In addition, as long as the light distribution characteristics are sufficiently provided on each reflecting surface as in the present embodiment, the front lens 7 can be a transparent lens.

According to the first embodiment of the present invention configured as described above, a plurality of light emitting points can be obtained by one light source, and the surface size of the vehicle lamp itself can be increased. As a result, it is possible to obtain a novelly designed vehicle lamp. Further, since a plurality of reflection surfaces are formed, the light distribution characteristics can be varied by changing the shape of each reflection surface.

FIG. 2 shows a second embodiment according to the present invention. In the first embodiment, the main cylindrical elliptical reflecting surface 3 is provided with a sub-cylindrical elliptical reflecting surface 11 connected thereto. The size of the surface of the lamp 1 is further enlarged. Here, the sub-cylindrical elliptical reflecting surface 11 will be described in detail. The main cylindrical elliptical reflecting surface 3 is provided at the second focal point 3b of the main cylindrical elliptical reflecting surface 3 provided similarly to the first embodiment. A first focal point 11a of the sub-cylindrical elliptical reflecting surface 11 having the same shape as that of the sub-cylindrical elliptical reflecting surface 11 is provided so as to coincide with the second focal point 11b of the sub-cylindrical elliptical reflecting surface 11. The first ellipse 11a of the cylindrical elliptical reflecting surface 11 is matched. In the case of the second embodiment, the elliptical axes of the cylindrical elliptical reflecting surfaces 3 and 11 are all made coincident with the tilt axis Y described in the first embodiment, that is, they are linear. .

The sub-cylindrical elliptical reflecting surface 11 may be connected several times as required, and may be one. In the second embodiment, the number of the sub-cylindrical elliptical reflecting surfaces 11 is two,
Each shape is the same as the main cylindrical elliptical reflecting surface 3. However, even if the focal length is changed and the elliptical shape is changed, the positional relationship of the focal point of each cylindrical elliptical reflecting surface is connected as described above. Anything that matches is good.

The focal point of the first reflecting surface 4 and the projection lens 6 coincides with the second focal point of the last end of the sub-cylindrical elliptical reflecting surface 11 opposite to the light source 2 as in the first embodiment. The vehicle lighting device 1 is configured by providing the second reflection surface 5 on the light source 2. The other configuration is the same as that of the first embodiment, and the description is omitted.

In the second embodiment, the non-reflecting surfaces of the main cylindrical elliptical reflecting surface 3 and the sub-cylindrical elliptical reflecting surface 11 which appear in the direction of the irradiation axis X are colored amber to form a colored portion 8.
Is provided. By doing so, the appearance of these reflecting surfaces is made inconspicuous when not lit. On the contrary, the colored portion 8 may be colored by another color or aluminum vapor deposition to emphasize the appearance of the reflecting surface which is rich in the present invention. Of course, the coloring portion 8 may be provided by coloring only one of the main cylindrical elliptical reflecting surface 3 and the sub cylindrical elliptical reflecting surface 11.

According to the second embodiment, the light source 2
A light emitting point exists at a distance without wasting light, and a completely new design of the vehicular lamp 1 can be achieved, and the size of the surface of the vehicular lamp 1 can be increased. Become. Further, since each reflecting surface in the vehicular lamp 1 is unique, it is possible to obtain a high design with a three-dimensional change even when it is not lit by coloring it or the like. .

FIGS. 3 to 5 show a third embodiment of the present invention. Also in this third embodiment, the configuration and arrangement of the light source 2, the main cylindrical elliptical reflecting surface 3 and the second reflecting surface 5 are the same. The description is omitted because it is the same as the first and second embodiments.
The third embodiment is characterized in that the reflecting surface connected to the main cylindrical elliptical reflecting surface 3 is a semi-cylindrical sub-half cylindrical elliptical reflecting surface 21.

First, the sub-half-cylindrical elliptical reflecting surface 21 will be described. The sub-half-cylindrical elliptical reflecting surface 21 has a shape obtained by cutting the cylindrical elliptical reflecting surface of the embodiment by a plane on an elliptical axis. That is, the cylindrical elliptical reflecting surface is divided into two along the elliptical axis and is formed into one. Then, the surface on which the inner semi-cylindrical elliptical reflecting surface 21 is formed is oriented in the irradiation axis direction X, and one (first) focal point 21 a is shifted to the second focal point of the main cylindrical elliptical reflecting surface 3. 3b.

A projection lens 6 similar to that of the above-described embodiment is placed on the irradiation axis X side of the sub-half cylindrical elliptical reflecting surface 21 so that its focal point matches the second focal point 3b of the main cylindrical elliptical reflecting surface 3. To be provided. Further, the sub-half cylindrical elliptical reflecting surface 2
One or more sub-cylindrical elliptical reflecting surfaces 11 similar to those of the above-described embodiment are connected to the other (second) focal point 21b of the first embodiment, and the parabolic mirror has a focal point at the second focal point 11b at the final end. The first reflection surface 4 such as a surface is formed. In the third embodiment, the auxiliary semi-cylindrical elliptical reflecting surface 21 is provided so as to be connected to the main cylindrical elliptical reflecting surface 3, but the sub-cylindrical elliptical reflecting surface 11 is provided therebetween. Is also good.

FIG. 4 is a front view showing only the reflecting surfaces and the projection lens 6 of the vehicular lamp 1 of the present embodiment. By configuring each of the reflecting surfaces of the vehicular lamp 1 and the projection lens 6 as described above, light is emitted from a position indicated by oblique lines in the drawing. A light-emitting portion is obtained, and the vehicle lamp 1 having a different design from before can be obtained. FIG. 5 is a perspective view showing only the reflection surface and the projection lens 6 of the vehicle lamp 1 of the present embodiment. As shown in the figure, according to the vehicular lamp 1 of the present invention, each reflecting surface and the convex surface and the concave surface of the projection lens 6 are sequentially combined to provide a three-dimensional three-dimensional design when not lit. It is completely different from the vehicle lamp.

FIGS. 6 and 7 show a fourth embodiment according to the present invention. Basic components are the same as those of the third embodiment. In the fourth embodiment, the connection state of the sub-cylindrical elliptical reflecting surface 11 or the sub-half cylindrical elliptical reflecting surface 21 of the third embodiment is changed. The elliptical axis of the elliptical reflecting surface 3 and the elliptical axis of the sub-half cylindrical elliptical reflecting surface 11 or the sub semi-cylindrical elliptical reflecting surface 21 and the sub-cylindrical elliptical reflecting surface 11
Although the elliptical axis is formed substantially in a straight line, in the present embodiment, the elliptical axis is inclined in a predetermined direction.

FIG. 6 shows only the reflecting surface and the projection lens 6 for the sake of explanation, and the other components are omitted. Here, when the elliptical axis of the main cylindrical elliptical reflecting surface 3 is A, the elliptical axis of the sub-half cylindrical elliptical reflecting surface 21 is B, and the elliptical axis of the sub-cylindrical elliptical reflecting surface 11 is C, If the angle is 180 °, the angle θ1 between the elliptical axes A and B is about 150 ° in the direction on a plane orthogonal to the irradiation axis X, and the angle θ2 between the elliptical axes B and C is also 150 °. , And in a direction orthogonal to this, each has an angle of 165 °. At this time, the angle and direction of the tilt can be freely set. However, if the angle is less than 60 °, the cylindrical elliptical reflecting surface is not effectively formed and the function of the reflecting surface is weakened. It is necessary. FIG. 7 shows the reflection surface of the lamp 1 and the projection lens 6.
In this manner, each reflecting surface can be changed three-dimensionally, and these reflecting surfaces visually recognized through the front lens 7 at the time of non-lighting can be novel. .

In any of the embodiments described above, a structure in which a light shielding plate is provided for a projection lens, a structure in which a front lens is provided and a lens cut is provided at a predetermined location, and a non-reflection surface of a cylindrical elliptical reflection surface is on the irradiation axis side. To the surface appearing in, and the first reflection surface and the second reflection surface, the free-form surface reflection surface, convex or concave reflection surface, the configuration to form a plane reflection surface or a composite reflection surface thereof, other, It is obvious that the present invention also includes embodiments in which these are combined.

[0032]

According to the present invention, since the lamp 1 has the above-described structure, it is possible to obtain a lighting state in which a plurality of light sources exist even though only one light source emits light. It will be a novel design. In addition, when not lit, the convexity expressed by the cylindrical elliptical reflecting surface and the concave feeling of the semi-cylindrical elliptical reflecting surface and the first and second reflecting surfaces are sequentially combined, so that the three-dimensional modeling is emphasized. Thus, an unprecedented lamp shape can be provided. Furthermore, since the light source is covered with the main cylindrical elliptical reflection surface, it is not directly visible, so that it is possible to improve the merchantability, and it is possible to use the light of the light source over substantially the entire area, and to obtain a bright lamp. It can be.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a lamp according to the present invention.

FIG. 2 is a sectional view showing a second embodiment of the lamp according to the present invention.

FIG. 3 is a sectional view showing a third embodiment of the lamp according to the present invention.

FIG. 4 is a front view showing a reflecting surface of the lamp shown in FIG. 3;

FIG. 5 is a perspective view showing a reflecting surface of the lamp shown in FIG. 3;

FIG. 6 is a front view showing a fourth embodiment of the lamp according to the present invention.

FIG. 7 is a perspective view showing a reflection surface of the lamp shown in FIG.

FIG. 8 is a sectional view showing a conventional example.

FIG. 9 is a sectional view showing another conventional example.

FIG. 10 is a sectional view showing still another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Lamp 2 ... Light source 2a ... Light emission source 2b ... Pseudo light source 3 ... Main cylindrical elliptical reflection surface 3a ... First focus 3b ... Second focus 4 ... First reflection surface 5 ... Second Bireflecting surface 6 Projection lens 7 Front lens 7a Lens cut 8 Colored section 11 Sub-cylindrical elliptical reflecting surface 11a First focus 11b Second focus 21 Sub-half cylinder Elliptical reflecting surface 21a: First focus 21b: Second focus

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Claims (10)

[Claims] 1. A light source having a first focus and a second focus on an inclined axis that passes through the light source and is inclined at a predetermined angle with respect to an irradiation axis of a lamp, and the first focus is disposed on the light source. The main cylindrical elliptical reflecting surface, the lens and the first reflecting surface having a second focal point of the main cylindrical elliptical reflecting surface as the focal point, and the light source as the focal point; A vehicular lamp comprising: a second reflection surface that reflects light not covered by the elliptical reflection surface in an irradiation axis direction. 2. A light source having a first focus and a second focus on an inclined axis that passes through the light source and is inclined at a predetermined angle with respect to an irradiation axis of a lamp, and the first focus is disposed on the light source. The main cylindrical elliptical reflecting surface, the sub cylindrical elliptical reflecting surface having the first focal point at the second focal point of the main cylindrical elliptical reflecting surface, and the second focal point of the sub cylindrical elliptical reflecting surface as the focal point. A lens and a first reflecting surface, and the light source as a focus, of the light of the light source,
A vehicular lamp comprising: a second reflecting surface that reflects light not covered by the main cylindrical elliptical reflecting surface in an irradiation axis direction. 3. The sub-cylindrical elliptical reflecting surface is formed by connecting a plurality of cylindrical elliptical reflecting surfaces such that one of the focal points coincides with each other. The vehicular lamp according to claim 2, wherein a second focal point at an end portion of the reflecting surface opposite to the light source is a focal point. 4. A light source having a first focus and a second focus on an inclined axis passing through the light source and inclined at a predetermined angle with respect to an irradiation axis of a lamp, wherein the first focus is disposed on the light source. A main cylindrical elliptical reflecting surface, and a semi-cylindrical sub-half cylindrical elliptical reflecting surface having a first focal point at a second focal point of the main cylindrical elliptical reflecting surface,
A lens having a focal point at a first focal point of the sub-half cylindrical elliptical reflecting surface, a first reflecting surface having a focal point at a second focal point of the sub semi-cylindrical elliptical reflecting surface, and the light source being a focal point, And v. A second reflection surface for reflecting light not covered by the main cylindrical elliptical reflection surface in the irradiation axis direction. 5. A light source having a first focus and a second focus on an inclined axis passing through the light source and inclined at a predetermined angle with respect to an irradiation axis of a lamp, wherein the first focus is disposed on the light source. The main cylindrical elliptical reflecting surface, and a plurality of cylindrical elliptical reflecting surfaces are connected so that one focal point coincides with the other, and the cylindrical elliptical reflecting surface at one end is connected to the second focal point of the main cylindrical elliptical reflecting surface. A sub-cylindrical elliptical reflecting surface provided so that the first focal point matches, a first reflecting surface having a focus at a second focal point at the other end of the sub-cylindrical elliptical reflecting surface, and the light source as a focus, Of the light of the light source, a second reflecting surface that reflects light not covered by the main cylindrical elliptical reflecting surface in the irradiation axis direction, and one cylindrical elliptical reflecting surface of the sub-cylindrical elliptical reflecting surface is further irradiated. An auxiliary semi-cylindrical elliptical reflecting surface formed of only a reflecting surface that reflects light in the axial direction, And a lens having a focal point at a second focal point at the first focal point, the second focal point being coincident with the cylindrical elliptical reflecting surface on the light source side connected to the sub-half cylindrical elliptical reflecting surface. 6. The elliptical reflecting surface of the main cylindrical elliptical reflecting surface, the sub-cylindrical elliptical reflecting surface, or the sub-hemi-cylindrical elliptical reflecting surface, the elliptical axis of which is linear with respect to the elliptical axis of the adjacent elliptical reflecting surface. When the overlapping time is 180 °, it is 60 ° to 18 in a predetermined direction.
The vehicle lighting device according to any one of claims 2 to 5, wherein the vehicle lighting device is shifted by 0 °. 7. A light-shielding plate near one of the focal points of the main cylindrical elliptical reflecting surface, the sub-cylindrical elliptical reflecting surface, and the sub-cylindrical elliptical reflecting surface that coincides with the focal point of the lens. The vehicle lighting device according to any one of claims 1 to 6, further comprising: 8. The vehicle lamp according to claim 1, wherein the vehicle lamp is provided with a front lens having a lens cut at a predetermined position. 9. The non-reflective surface of the main cylindrical elliptical reflecting surface or the sub-cylindrical elliptical reflecting surface, which appears in the direction of the irradiation axis, is colored in a predetermined manner. 8
The vehicle lighting device according to any one of the above. 10. The apparatus according to claim 1, wherein the first reflecting surface and the second reflecting surface are any one of a parabolic reflecting surface, a free-form reflecting surface, a convex or concave reflecting surface, a plane reflecting surface, and a composite reflecting surface thereof. The vehicular lamp according to any one of claims 1 to 9.