JP4485698B2 - Vehicle signal lights - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicular lamp, and more particularly, to a signal lamp that is provided for notifying other vehicles, pedestrians, and the like of the presence and behavior of the vehicle.
[0002]
[Prior art]
FIG. 5 shows an example of the configuration of a conventional vehicle signal lamp 90 of this type. The vehicle signal lamp 90 has an incandescent bulb 91 and a filament 91a of the incandescent bulb 91 as a focal point, and the filament 91a. A paraboloidal reflecting mirror 92 that reflects light from the irradiation direction, and a lens 93 provided with a lens cut 93a that covers the reflecting mirror 92 from the irradiation direction side.
[0003]
In the vehicular signal lamp 90 configured in this way, the light emitted from the incandescent bulb 91 (filament 91a) becomes parallel light and enters the lens 93, for example, the lens formed as a fish-eye lens. Appropriate diffusion is given by the cut 93a, and lighting of the vehicular signal lamp 90 can be confirmed from a wide angle.
[0004]
In recent years, since there is a tendency that the vehicle signal lamp 90 having a strong sense of transparency in design tends to be preferred in the market, the reflection mirror 92 is combined with a plurality of reflection surfaces having different reflection directions to form a composite reflection surface. Reflected light by the reflecting mirror 92 itself forms a light distribution characteristic, and the lens cut 93a applied to the lens 93 is omitted, or a lighter one with improved transparency is adopted. Yes.
[0005]
[Problems to be solved by the invention]
However, in the vehicle signal lamp 90 having the conventional configuration described above, when the lens cut 93a is applied to the lens 93, the surface of the lens 93 appears to emit light and gives a planar impression. In addition, in the case where the light distribution characteristic is formed by the reflecting mirror 92, the reflecting mirror 92 appears to emit light, and in any case, it is difficult to obtain a novel lighting state with excellent stereoscopic effect. Has a problem that the impression of lighting is uniform.
[0006]
[Means for Solving the Problems]
As a specific means for solving the above-described conventional problems, the present invention receives a light emitted in the optical axis direction of the LED lamp from the front and reflects it in the circumferential direction of the optical axis; and In a vehicular signal lamp that includes an LED light emitting unit that includes a secondary reflection surface that reflects reflected light from a primary reflection surface in the illumination direction of the lamp, the primary reflection surface has a reflection axis with respect to the optical axis. It is a composite reflection surface in which at least two reflection surfaces with different angles are connected to each other, the secondary reflection surface is provided as a position corresponding to the angle of each reflection axis of the primary reflection surface, and the primary reflection surface is A parabolic curved surface in which at least one parabola having a reflection axis intersecting the optical axis is rotated by the optical axis, and a hyperbolic mechanism in which a hyperbola having a second focal point in the optical axis is rotated by the optical axis. Compound reflection consisting of curved surfaces The secondary reflection surface is formed so that a plane appears in a cross section along the optical axis, and is provided corresponding to the parabolic curved surface, and the second focal point is the focal point. A vehicular signal lamp formed as a rotating paraboloid surface and provided corresponding to the hyperbolic curved surface , and an incandescent bulb on the back surface of the LED light emitting unit An incandescent light-emitting unit that generates reflected light in the irradiation direction by a rotating paraboloid is provided to solve the problem by providing a vehicular signal lamp.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Below, this invention is demonstrated in detail based on embodiment shown in a figure. What is indicated by reference numeral 10 in FIG. 1 is a first embodiment of an LED light-emitting unit 10 that is a main part of the vehicle signal lamp 1 according to the present invention. In the present invention, the vehicle signal lamp 1 is an LED light-emitting unit 10. Is required.
[0008]
Therefore, in the description here, first, the configuration of the LED light emitting unit 10 will be described in detail, and then the overall configuration of the vehicular signal lamp 1 will be described. In the first embodiment, the LED light emitting unit 10 includes an LED lamp 11, a primary reflection surface 12, and a secondary reflection surface 13.
[0009]
The LED lamp 11 is installed with the optical axis X directed substantially in the irradiation direction of the vehicular signal lamp 1, and the primary reflecting surface 12 is provided in front of the irradiation direction of the LED lamp 11. Is reflected toward the side or obliquely rearward.
[0010]
Here, in the present invention, the primary reflection surface 12 is formed as a composite reflection surface. In the first embodiment, the primary reflection surface 12 is a parabolic curved surface 12a based on a parabola and a hyperbola based hyperbola. It is formed as two composite reflecting surfaces with the curved surface 12b.
[0011]
The parabolic curved surface 12a is formed on the basis of a parabola P having the LED lamp 11 as a focal point f1. At this time, in the first embodiment, the parabola P has a center line Y as the center of the LED lamp 11. It is assumed to be orthogonal to the optical axis X. In the parabola P, since the center line determines the reflection direction, the center line is referred to as a reflection axis S in the following description.
[0012]
The parabola P is rotated around the optical axis X of the LED lamp 11 to form a parabolic curved surface 12a. At this time, the parabolic curved surface 12a is generated forward and backward with respect to the irradiation direction of the LED lamp 11, but since the LED lamp 11 emits light only forward, the focal point f1. The parabolic curved surface generated behind is omitted.
[0013]
On the other hand, the hyperbola H is composed of one curve to which the first focus belongs and the other curve to which the second focus belongs, and the light from the light source placed at the first focus f1 When reflection is performed with a curved line, the reflected light has the same characteristics as the state in which the light source is placed at the second focal point f2.
[0014]
Therefore, in this first embodiment, the hyperbola H is set as the other hyperbola H with the LED lamp 11 as the first focal point f1, and the LED lamp as in the case of the parabolic curved surface 12a. 11 is rotated around the optical axis X to obtain a hyperbolic curved surface 12b. In forming both curved surfaces 12a and 12b, it is necessary to adjust the focal lengths of both curves P and H so as not to cause an extreme step or the like at the connecting portion between both curved surfaces 12a and 12b. Is preferred.
[0015]
With the above configuration, the primary reflecting surface 12 of the first embodiment is a disc-shaped reflecting member having a thickness radiated from the parabolic curved surface 12a to the entire circumference in the direction orthogonal to the optical axis X. Light is obtained, and reflected light gradually spreading in a substantially donut shape from the second focal point f2 obliquely rearward is obtained from the hyperbolic curved surface 12b.
[0016]
And in this invention, the secondary reflective surface 13 is provided in the position where the reflected light from the said primary reflective surface 12 reaches | attains, and it is made to re-reflect toward the irradiation direction of the signal lamp 1 for vehicles. In the embodiment, since the primary reflecting surface 12 is configured by a combination of a parabolic curved surface 12a and a hyperbolic curved surface 12b, the secondary reflecting surface 13 corresponds to the first secondary reflecting surface 13a and the second second reflecting surface 13a. Two surfaces of the next reflecting surface 13b are provided.
[0017]
First, since the first secondary reflection surface 13a is provided corresponding to the parabolic curved surface 12a, and the light reflected from the parabolic curved surface 12a has a disk shape orthogonal to the optical axis X, A circumferential direction is provided with respect to the primary reflecting surface 12. Since the reflected light from the parabolic curved surface 12a is a parallel light beam in the front-rear direction of the optical axis X, for example, when the light distribution characteristic is formed by the reflected light from the first secondary reflection surface 13a. Except for this, basically, a plane appears in the cross section along the optical axis X.
[0018]
On the other hand, a second secondary reflection surface 13b is provided corresponding to the hyperbolic curved surface 12b, and the reflected light from the hyperbolic curved surface 12b is reflected from the second focal point f2. Since it has a characteristic of radiating at an angle that allows the inner and outer diameters of the hyperbolic curved surface 12b to be expected, it is basically formed as a rotating paraboloid with the second focal point f2 as a focal point. Therefore, the reflected light from the second secondary reflecting surface 13b becomes a substantially donut-shaped parallel light beam. As described in the section of the first secondary reflecting surface 13a, the reflected light from the second secondary reflecting surface 13b. This is not the case when the light distribution characteristic is formed by light itself.
[0019]
FIG. 2 shows a second embodiment of the LED light emitting unit 10 according to the present invention. In this second embodiment also, the primary reflecting surface 12 (parabolic curved surface 12a, hyperbolic curved surface 12b) and secondary reflection are shown. The configuration of the surface 13 (the first secondary reflection surface 13a and the second secondary reflection surface 13b) is exactly the same as that of the first embodiment described above, but the parabolic curved surface 12a and the hyperbolic curved surface. 12b and the 1st secondary reflective surface 13a are integrated and comprised by the light guide 14 by high refractive members, such as transparent resin.
[0020]
If the said structure is demonstrated in detail, the lamp attachment part 14a is provided in the said light guide 14, and the light from the LED lamp 11 can be introduce | transduced in the light guide 14. FIG. The parabolic curved surface 12a and the hyperbolic curved surface 12b are formed on the irradiation direction side of the optical axis X of the LED lamp 11 as a boundary surface between the light guide 14 and the atmosphere.
[0021]
By forming in this way, when the light emitted from the LED lamp 11 into the light guide 14 reaches the parabolic curved surface 12a and the hyperbolic curved surface 12b, the air at the boundary surface and the light guide 14 are formed. The inner surface is reflected by the difference in refractive index between and the parabolic curved surface 12a and the hyperbolic curved surface 12b in the first embodiment.
[0022]
At this time, since the parabolic curved surface 12a reflects disk-shaped parallel light orthogonal to the optical axis X, the light guide 14 is formed into a disk shape having a thickness corresponding to the parabolic curved surface 12a. If the formed light guide portion 14b is provided, the total amount of light reflected from the parabolic curved surface 12a passes through the light guide portion 14b and is directed toward the outer periphery.
[0023]
Therefore, if the first secondary reflection surface 13a having an elevation angle of 45 ° or the like is formed on the light guide portion 14b including the outer periphery as a boundary surface with the atmosphere, the reflected light from the parabolic curved surface 12a is reflected to the first secondary surface. The light is emitted from the light guide 14 to the outside as being directed to the irradiation direction by the reflecting surface 13a.
[0024]
Further, the light guide body 14 is configured so that the reflected light from the hyperbolic curved surface 12b has the same configuration as that of the first embodiment, that is, the second secondary reflection surface 13b that is not integrated with the light guide body 14. Is provided with a spherical portion 14c for reaching the reflected light without changing the nature of the reflected light. The spherical portion 14c has a spherical shape centered on the second focal point f2, and is reflected from the hyperbolic curved surface 12b. Is provided in a range through which.
[0025]
By doing so, the reflected light from the hyperbolic curved surface 12b is pseudo-radiated light from the second focal point f2, so in the spherical portion 14c centered on the same second focal point f2, No refraction occurs and the light is radiated into the atmosphere. For example, the second secondary reflection surface 13b that is a rotating paraboloid with the second focal point f2 as a focal point is reflected as parallel rays directed in the irradiation direction. Will be done.
[0026]
FIG. 3 is a third embodiment of the LED light emitting unit 10 according to the present invention. In the third embodiment, the primary reflecting surface 12 is a parabolic curved surface 12a, a hyperbolic curved surface 12b, and a second emitting surface. Constructed as a composite of three curved surfaces of the physical curved surface 12c, the secondary reflecting surface 13 is also associated with the first secondary reflecting surface 13a, the second secondary reflecting surface 13b, and the third secondary reflecting surface 13c. It is provided corresponding to each of the primary reflection surfaces 12.
[0027]
Here, in order to facilitate understanding, the configurations of the parabolic curved surface 12a and the first secondary reflecting surface 13a, and the hyperbolic curved surface 12b and the second secondary reflecting surface 13b are the same as those in the first embodiment. The parabolic curved surface 12a and the first secondary reflecting surface 13a, and the hyperbolic curved surface 12b and the second secondary reflecting surface 13b are substantially the same in configuration and formed by the same means. Only the second parabolic curved surface 12c and the third secondary reflecting surface 13c added in the third embodiment will be described.
[0028]
In the third embodiment, the second parabolic curved surface 12c is provided so as to be sandwiched between the first parabolic curved surface 12a and the hyperbolic curved surface 12b. The parabola P2 for forming the second parabolic curved surface 12c is such that the center line Z is inclined obliquely rearward to generate reflected light that is directed obliquely rearward. Parallel rays.
[0029]
In correspondence with the second parabolic curved surface 12c, a third secondary reflecting surface 13c, which is basically a plane mirror, is provided. The third secondary reflecting surface 13c is the second reflecting surface 13c. Since light parallel to the center line Z of the parabolic curved surface 12c is generated, the light is inclined correspondingly and reflected in the irradiation direction. With this configuration, when the LED light emitting unit 10 in the third embodiment is viewed from the front, the first secondary reflection surface 13a, the second secondary reflection surface 13b, and the third secondary reflection surface 13c However, they exist at different depths and circumferential positions, so that the three-dimensional effect can be further improved.
[0030]
As apparent from the above description, the primary reflecting surface 12 may be a parabolic curved surface or a hyperbolic curved surface as long as the secondary reflecting surface 13 to be combined is appropriate. It becomes. Therefore, even in the first embodiment in which the parabolic curved surface 12a and the hyperbolic curved surface 12b are provided in combination as the primary reflecting surface 12, both can be parabolic curved surfaces.
[0031]
FIG. 4 shows an embodiment of the vehicular signal lamp 1 according to the present invention, and the LED light emitting unit 10 described in the first to third embodiments is one or a plurality of combinations. Although the lamp 1 can be configured, in this embodiment, the lamp 1 is combined with an incandescent light emitting unit 4 including an incandescent bulb 2 and a reflecting surface 3 such as a rotating paraboloid with the incandescent bulb 2 as a focal point. A vehicular signal lamp 1 is configured.
[0032]
The combination of the LED light-emitting unit 10 and the incandescent light-emitting unit 4 is the same as that of the LED light-emitting unit 10 in this embodiment, as described in the second embodiment above, the parabolic curved surface 12a and the first secondary reflecting surface 13a. Are integrated with a light guide body 14 made of a high refractive member, and the incandescent light emitting unit 4 is provided on the back surface thereof, so that the portion of the light guide body 14 of the LED light emitting unit 10 is incandescent. 4 to perform the function of the outer lens.
[0033]
The hyperbolic curved surface 12b is provided with a second secondary reflection surface 13b such as a paraboloid of revolution. In this embodiment, the second secondary reflection surface 13b is The outer periphery of the reflecting surface 3 of the incandescent light emitting unit 4 is provided.
[0034]
Since the LED lamp 11 is placed on the optical axis X of the incandescent light bulb 2 and close to the LED lamp 11 due to the above arrangement, it is strongly affected by the heat from the incandescent light bulb 2. It is preferable to provide a heat insulating plate 5 between the LED lamp 11 and the incandescent bulb 2 which are considered to be sensitive to heat.
[0035]
With this configuration, in the vehicular signal lamp 1 according to this embodiment, the LED light emitting unit 10 is provided in front of the reflecting surface 3 of the incandescent light emitting unit 4 where it is easy to obtain a wide light emitting area with high brightness. Since the first secondary reflection surface 13a and the second secondary reflection surface 13b are present, a further three-dimensional effect is given to the viewer. At this time, the first secondary reflection surface 13a and the second secondary reflection surface 13b may be improved, for example, by disposing them intermittently on the circumference. .
[0036]
【The invention's effect】
As described above, according to the present invention, a primary reflection surface that receives light emitted in the optical axis direction of the LED lamp from the front and reflects it in the circumferential direction of the optical axis, and reflected light from the primary reflection surface. In a vehicular signal lamp provided with an LED light emitting unit comprising a secondary reflection surface that reflects in the irradiation direction of the lamp, at least two reflection surfaces in which the angle of the reflection axis of the primary reflection surface differs from the optical axis The secondary reflection surface is a vehicle signal lamp provided as a position corresponding to the angle of the respective reflection axes of the primary reflection surface. By using multiple, it is possible to arrange the secondary reflection surface at different positions such as the front and rear direction, and it is possible to produce a further sense of depth and stereoscopic effect, and a signal light for vehicles with a novel appearance that is not conventional It is possible to provide That is intended to achieve an extremely excellent effect.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of a vehicular signal lamp according to the present invention as an LED light emitting unit as a main part.
FIG. 2 is a cross-sectional view showing a second embodiment of the vehicular signal lamp according to the present invention as an LED light emitting unit as a main part.
FIG. 3 is a cross-sectional view showing a third embodiment of the vehicular signal lamp according to the present invention as an LED light emitting unit as a main part.
4 is a cross-sectional view showing an embodiment of a vehicular signal lamp according to the present invention. FIG.
FIG. 5 is a cross-sectional view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Vehicle signal lamp 2 ... Incandescent light bulb 3 ... Reflective surface 4 ... Incandescent light emitting unit 5 ... Insulation board 10 ... LED light emitting unit 11 ... LED lamp 12 ... Primary reflective surface 12a ... Parabolic System curved surface 12b ... Hyperbolic curved surface 12c ... Second parabolic curved surface 13 ... Secondary reflecting surface 13a ... First secondary reflecting surface 13b ... Second secondary reflecting surface 13c ... Third secondary Reflective surface 14 ... Light guide 14a ... Lamp mounting part 14b ... Light guide part 14c ... Spherical surface part

Claims (2)

A primary reflection surface that receives light emitted in the optical axis direction of the LED lamp from the front and reflects it in the circumferential direction of the optical axis, and a secondary reflection that reflects the reflected light from the primary reflection surface in the illumination direction of the lamp In a vehicle signal lamp comprising an LED light emitting unit comprising a surface,
The primary reflection surface is a composite reflection surface in which at least two reflection surfaces having different reflection axis angles with respect to the optical axis are joined together, and the secondary reflection surface is an angle of each reflection axis of the primary reflection surface. is provided as a position corresponding to,
The primary reflecting surface is
A parabolic curved surface in which at least one parabola having a reflection axis intersecting the optical axis is rotated by the optical axis, and a hyperbolic mechanism in which a hyperbola having a second focal point in the optical axis is rotated by the optical axis. A compound reflecting surface consisting of a curved surface,
The secondary reflection surface is formed so that a plane appears in a cross section along the optical axis, and is provided corresponding to the parabolic curved surface, and a rotary beam focusing on the second focus. A vehicular signal lamp comprising a second secondary reflecting surface formed as an object surface and provided corresponding to the hyperbolic curved surface . The vehicle signal lamp according to claim 1, characterized in that incandescent light emitting unit to produce a reflected light irradiation direction is provided by the paraboloid incandescent bulbs on the rear surface of the LED light emission unit.

Images