JP3331581B2 - Vehicle lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp provided with a concentric prism element group (so-called Fresnel prism) provided in a lens, for example, in a rear combination lamp or the like, together with a vehicular lamp having another function. In particular, a concentric prism element of a lens for a vehicle lamp of another function, which can use reflected light from a reflection surface of a paraboloid of revolution and has a ring pattern of a group of concentric prism elements on the inner surface of the inner lens when the light source bulb is turned on. The present invention relates to a vehicular lamp that looks the same as a ring pattern of a group and can improve the appearance.

[0002]

2. Description of the Related Art A vehicle lamp of this type will be described with reference to FIGS. This example describes an example used for a rear combination lamp composed of a combination of a turn signal lamp, a tail stop lamp, a back lamp, a tail lamp, and the like. In the figure, A is the first function of the rear combination lamp (for example, one of a turn signal lamp, a tail stop lamp, a back lamp, a tail lamp, etc.).
Of the first vehicle. B is a second vehicle lamp having a second function of the rear combination lamp (for example, one function other than the first function among the turn signal lamp, the tail stop lamp, the back lamp, the tail lamp, and the like).

The first vehicle lamp A includes a lamp housing 10, an inner lens 11 and an outer lens 12.
A light source 13 is defined in the light source 13, and a light source bulb 14 and a reflecting surface 15 for reflecting light from the light source bulb 14 toward the inner lens 11 and the outer lens 12 are provided in the light chamber 13. It is attached to the fixed body 16. In the second vehicle lamp B, a lamp chamber 23 is defined by a lamp housing 20, an inner lens 21, and an outer lens 22, and a light source bulb 24 is provided in the lamp chamber 23 to be movable. It is attached to the trunk lid 26 on the side.

When the light source bulb 14 of the first vehicle lamp A is turned on, the light from the light source bulb 14 is reflected by the reflection surface 15.
The reflected light is controlled by a predetermined light distribution pattern in the inner lens 11 and the outer lens 12 and radiated to the outside. When the light source bulb 24 of the second vehicular lamp B is turned on, the light from the light source bulb 24 is controlled to a predetermined light distribution pattern by the inner lens 21 and the outer lens 22 and emitted to the outside.

[0005]

Since the first vehicle lamp A in the rear combination lamp is mounted on the fixed vehicle body 16, the depth of the lamp housing 10 can be increased. Reflective surface 1
As 5, a paraboloid of revolution that is advantageous in light distribution characteristics can be used. On the other hand, the second vehicle lamp B in the rear combination lamp is a movable trunk lid 2.
6, the depth of the lamp housing 20 is limited to a small depth. As a result, the direct light of the light source bulb 24 must be used, so that a concentric prism element group (so-called Fresnel Prism 27 is provided.

Here, in the above-mentioned first vehicle lamp A, as shown in FIG. 10, a paraboloid of revolution is used as the reflecting surface 15 and the second vehicle lamp A is provided when the light source bulbs 14 and 24 are turned on. Inner lens 1 to make it look the same as the annular pattern of concentric prism element group 27 of lamp B
If the same concentric prism element group 17 as the concentric prism element group 27 on the inner surface of the inner lens 21 of the second vehicle lamp B is provided on the inner surface of the first vehicle lamp B, the following problem occurs. That is, the parallel light reflected from the reflecting surface 15 of the paraboloid of revolution forms the concentric prism element group 1 on the inner surface of the inner lens 11.
Since the light is refracted at 7 and enters the inner lens 11, the parallel light from the reflecting surface 15 of the paraboloid of revolution cannot be used as parallel light. Therefore, as shown in FIG. 11, the inner lens 11 is made transparent so that the reflecting surface 15 of a paraboloid of revolution is formed.
When the parallel light is used, the annular pattern of the concentric prism element group of the inner lens 11 cannot be obtained when the light source bulb 14 is turned on, and the concentric prism element group 27 of the inner lens 21 of the second vehicle lamp B attached thereto. No annular pattern of the same concentric prism element group as that of the annular pattern is seen.

An object of the present invention is to provide a vehicle having another function in which the reflected light from the reflecting surface of the paraboloid of revolution can be used, and the ring pattern of the concentric prism element group on the inner surface of the inner lens is provided when the light source bulb is turned on. It is an object of the present invention to provide a vehicular lamp that can look the same as the annular pattern of the concentric prism element group of the lens of the vehicular lamp and improve the appearance.

[0008]

According to the present invention, in order to achieve the above object, a concentric prism element group is provided on the inner surface of an inner lens, and the concentric prism element group has an optical axis. (Rotation axis of the paraboloid of revolution on the reflection surface)
Characterized in that a plane perpendicular to the plane is provided.

As a result, according to the present invention, the parallel reflected light (reflected light parallel to the optical axis) from the reflecting surface of the paraboloid of revolution is applied to the optical axis of the concentric prism elements on the inner surface of the inner lens. Since the light enters the inner lens without being refracted perpendicularly to the orthogonal plane, parallel reflected light from the reflecting surface of the paraboloid of revolution can be used. Also, a concentric prism element group is provided on the inner surface of the inner lens, so when the light source bulb is turned on, the concentric prism element of the lens of the vehicle lamp of another function is provided with a ring pattern of the concentric prism element group on the inner surface of the inner lens. It looks the same as the ring pattern of the group and can improve the appearance.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Two embodiments of a vehicle lamp according to the present invention will be described below with reference to FIGS. 1 to 5 show a first embodiment of a vehicular lamp according to the present invention. This example describes an example in which the vehicle lamp is a rear combination lamp. In the drawings, the same reference numerals as those in FIGS. 9 to 11 denote the same components. In the drawing, the pitch of the prism element group is shown as a schematic.

In FIG. 1, C is a first vehicle lamp having a first function (for example, one of a turn signal lamp, a tail stop lamp, a back lamp, and a tail lamp) of a rear combination lamp.

In the first vehicle lamp C, a lamp chamber 33 is defined by a lamp housing 30, an inner lens 31, and an outer lens 32 which are separate from the lamp housing 20, the inner lens 21, and the outer lens 22 of the second vehicle lamp B. A light source bulb 34 and a reflecting surface 35 for reflecting light from the light source bulb 34 toward the inner lens 31 and the outer lens 32 are provided in the lamp chamber 33, respectively. Attached to the car body.

A concentric prism element group 37 is provided on the inner surface of the inner lens 31. The concentric prism element group 37 on the inner surface of the inner lens 31 has an optical axis Z
Plane 370 orthogonal to −Z (ie, the optical axis ZZ).
And the plane 370 is 90 °), and the optical axis Z
And a plane 371 parallel to -Z. On the outer surface of the inner lens 31, there is provided a prism element group (a so-called vertical kamaboko prism) 38 which is formed by a part of a vertical axis convex cylindrical surface and diffuses the light incident from the concentric prism element group 37 in the horizontal direction and emits it. A prism element group (a so-called horizontal cylinder) is provided on the inner surface of the outer lens 32 and is formed of a part of a convex cylindrical surface having a horizontal axis to diffuse light from the inner lens 31 in a vertical direction and irradiate the light to the outside. Prism 39) is provided.

On the other hand, a second vehicle lamp separate from the first vehicle lamp C is used.
In the vehicle lamp B, the separate inner lens 21
A concentric prism element group 27 is provided on the inner surface of the light emitting device, and on the outer surface of the separate inner lens 21, there is provided a vertical cylindrical prism 28 substantially the same as the vertical cylindrical prism 38 of the first vehicle lamp C. On the inner surface of the separate outer lens 22, there is provided a horizontal cylindrical prism 29 substantially the same as the horizontal cylindrical prism 39 of the first vehicle lamp C.

Since the vehicle lamp of the present invention in this embodiment has the above configuration, when the light source bulb 34 is turned on, the parallel reflected light (optical axis ZZ) from the reflecting surface 35 of the paraboloid of revolution is turned on. Is reflected by the optical axis Z− of the concentric prism element group 37 on the inner surface of the inner lens 31.
Since the light enters the inner lens 31 without being refracted perpendicularly to the plane 370 orthogonal to Z, parallel reflected light from the reflecting surface 35 having a paraboloid of revolution can be used.

Since the concentric prism element group 37 is provided on the inner surface of the inner lens 31, the light source bulb 3 is provided.
At the time of turning on 4, the annular pattern of the concentric prism element group 37 on the inner surface of the inner lens 31 is visible. On the other hand, when the light source bulb 24 of the second vehicle lamp B of another function provided in addition to the first vehicle lamp C of the present invention is turned on, the ring pattern of the concentric prism element group 27 on the inner surface of the inner lens 21 can be seen. The annular pattern of the concentric prism element group 37 on the inner surface of the inner lens 31 of the first vehicular lamp C of the present invention and the concentric prism element group 27 on the inner surface of the inner lens 21 of the second vehicular lamp B of the present invention. Since the ring pattern looks the same, the appearance can be improved.

In particular, in this embodiment, substantially the same vertical cylindrical prism 38 is provided on the outer surface of the inner lens 31 of the first vehicle lamp C and the outer surface of the inner lens 21 of the second vehicle lamp B of the present invention. 28 are provided, and substantially the same horizontal prisms 39 and 29 are provided on the inner surface of the outer lens 32 of the first vehicle lamp C and the inner surface of the outer lens 22 of the second vehicle lamp B of the present invention, respectively. Since it is provided, the appearance of the first vehicular lamp C of the present invention when the light source bulbs 34 and 24 are turned off (the combination of the vertical prismatic pattern on the outer surface of the inner lens 31 and the horizontal prismatic pattern on the inner surface of the outer lens 32 is combined) Of the second vehicle lamp B (vertical vertical prism pattern on the outer surface of the inner lens 21 and the inner side of the inner surface of the outer lens 22) Since the appearance of a combination and the Maboko prism pattern) and is substantially the same, the light source bulb 34,
The appearance when the lights are turned off can also be improved.

In FIG. 1, the inner lens 31 corresponding to an ineffective portion (for example, a portion in which light from the light source bulb 34 is not reflected) 350 of the reflecting surface 35 of the paraboloid of revolution.
The inner surface portion (for example, a portion where the parallel reflected light from the reflecting surface 35 of the paraboloid of revolution does not reach) 372 may be the concentric prism element group 27 of the second vehicle lamp B described above.

The light incident on the outer surface of the inner lens 31 of the first vehicular lamp C and the outer surface of the inner lens 21 of the second vehicular lamp B according to the present invention is diffused in the direction perpendicular to the light incident from the concentric prism element groups 37 and 27. Each of the first and second vehicle lamps C of the present invention is provided with a horizontal or semi-cylindrical prism for emitting light.
Are provided on the inner surface of the outer lens 32 and the inner surface of the outer lens 22 of the second vehicular lamp B, respectively, with vertical prisms for diffusing light from the inner lenses 31 and 21 in the horizontal direction and irradiating the light to the outside. Is also good.

As shown in FIG. 6, the outer surface of the inner lens 310 of the first vehicular lamp C and the outer surface of the inner lens (not shown) of the second vehicular lamp B according to the present invention are partially spherically convex. A prism element group (a so-called fish-eye prism) that diffuses and emits light incident from a concentric prism element group
380 is provided, and the diffused light from the inner lens 310 is radiated to the outside through the outer lens of the first vehicle lamp C and the outer lens of the second vehicle lamp B of the present invention. May be.

FIGS. 7 and 8 show a second embodiment of the vehicle lamp of the present invention.
An embodiment will be described. In the drawing, the same reference numerals as those in FIGS. 1 to 6 and 9 to 11 denote the same components. The vehicle lamp D of the present invention in this embodiment includes a lamp housing 40 in which the first vehicle lamp and the second vehicle lamp of the present invention are the same.
And the same outer lens 41. An inner housing (or inner panel) 42 is provided in a space defined by the same lamp housing 40 and the same outer lens 41, and a light chamber 43 for a first vehicle lamp of the present invention. And a lamp chamber 44 for a second vehicle lamp. The first of the present invention
A light source bulb 34 and a reflecting surface 35 of a paraboloid of revolution are provided in a lamp room 43 for a vehicle lamp, and an inner lens 31 of a concentric prism element group 37 is provided on the inner surface and a vertical or concave prism 38 is provided on the outer surface. Have been. on the other hand,
The light source bulb 24 is provided in the lamp chamber 44 for the second vehicle lamp, and the inner lens 21 of the vertical conical prism 28 is provided on the outer surface of the concentric prism element group 27 on the inner surface. On the inner surface of the same outer lens 41, a horizontal concave prism 45 is provided.

The vehicle lamp of the present invention according to the second embodiment can achieve the same functions and effects as those of the vehicle lamp of the present invention according to the above-described first embodiment. In the vehicle lamp according to the present invention in the second embodiment, the outer surfaces of the inner lenses 31 and 21 may not be horizontal prisms, and the inner surface of the same outer lens 41 may be a vertical prism. Also, the inner lens 3
The outer surfaces of the lenses 1 and 21 may be formed as fish-eye prisms, and the same outer lens 41 may be made transparent. Inner lens 3
A portion of the inner surface corresponding to the ineffective portion of the reflecting surface 35 of the paraboloid of revolution may be used as a conventional concentric prism element group.

In the above embodiment, an example of a rear combination lamp as a vehicle lamp has been described. However, the present invention can be used for other vehicle lamps.

The reflecting surface 35 is provided on the lamp housing 30.
The lamp housing 30 is provided integrally with the lamp housing 30.
The reflector may be provided separately from the reflector.

[0025]

As is apparent from the above description, the vehicular lamp according to the present invention can utilize the light reflected from the reflecting surface of the paraboloid of revolution, and when the light source bulb is turned on, the concentric prism element group on the inner surface of the inner lens. The appearance of the ring pattern of the concentric prism element group of the lens of the vehicle lamp of another function provided with the ring pattern can be improved by looking the same.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of an inner lens in which an outer vertical prismatic prism is omitted.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 2;

FIG. 5 is a perspective view of an inner lens illustrating an outer vertical prismatic prism;

FIG. 6 is a perspective view of an inner lens whose outer surface is a fish-eye prism.

FIG. 7 is a front view showing a vehicle lamp according to a second embodiment of the present invention.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7;

FIG. 9 is a front view of a conventional vehicular lamp showing an example used for a rear combination lamp.

FIG. 10 is a sectional view taken along the line XX in FIG. 9 when the inner lens is a Fresnel prism and a vertical kamaboko prism.

FIG. 11 is a sectional view similar to FIG. 10 when the inner lens is transparent.

[Explanation of symbols]

B: Rear combination lamp for the second vehicle,
C: first vehicle lamp of a rear combination lamp (vehicle lamp of the present invention), D: rear combination lamp (first vehicle lamp and second vehicle lamp of the present invention), 20: second vehicle lamp Lamp housing, 21
... Inner lens of second vehicle lamp, 22 ... Outer lens of second vehicle lamp, 23 ... Light room of second vehicle lamp,
Reference numeral 24: light source bulb of the second vehicle lamp, 27: concentric prism element group, 28: vertical cylindrical lamp, 29: horizontal cylindrical prism, 30: lamp housing of the first vehicle lamp, 31: first vehicle lamp Inner lens, 32: outer lens of the first vehicle lamp, 33: light chamber of the first vehicle lamp, 34: light source bulb of the first vehicle lamp, 35: rotation paraboloid of the first vehicle lamp Reflecting surface, 350: invalid portion of the reflecting surface, 37: concentric prism element group, 370: plane perpendicular to the optical axis, 371: plane parallel to the optical axis, 372: reflecting surface of the inner surface of the inner lens , A portion corresponding to the invalid portion of 38, a vertical kamaboko prism, 38
0: fish-eye prism, 39: horizontal or prismatic prism, 40:
Same lamp housing, 41: Same outer lens, 42: Inner housing, 43: Light room of first vehicle lamp, 44: Light room of second vehicle lamp, ZZ: Optical axis.

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Claims (12)

(57) [Claims] 1. A vehicular lamp provided with a vehicular lamp having another function in which a lens is provided with a concentric prism element group, wherein a lamp chamber is defined by a lamp housing, an inner lens and an outer lens. A vehicular lamp in which a light source bulb and a reflection surface of a paraboloid of revolution for reflecting light from the light source bulb toward the inner lens and the outer lens are provided, respectively, wherein the inner surface of the inner lens A vehicle lighting device comprising: a concentric prism element group; and a surface orthogonal to the optical axis, the concentric prism element group. 2. The vehicle according to claim 1, wherein the concentric prism element group is provided at least in a portion of the inner surface of the inner lens through which parallel reflected light from the reflecting surface is transmitted. Lighting fixtures. 3. The concentric prism element group on the inner surface of the inner lens includes a plane orthogonal to an optical axis and a plane parallel to the optical axis. Vehicle lighting fixtures. 4. An outer surface of the inner lens is provided with a prism element group formed of a part of a convex cylindrical surface of a vertical axis and diffusing light incident from the concentric prism element group in a horizontal direction and emitting the light, A prism element group comprising a part of a convex cylindrical surface of a horizontal axis is provided on an inner surface of the outer lens to diffuse light from the inner lens in a vertical direction and irradiate the light to the outside. 4. The vehicular lamp according to 1 or 2 or 3. 5. An outer surface of the inner lens is provided with a prism element group which is composed of a part of a convex cylindrical surface of a horizontal axis and which diffuses light incident from the concentric prism element group in a vertical direction and emits the light, The inner surface of the outer lens is provided with a prism element group which is formed of a part of a convex cylindrical surface having a vertical axis and diffuses light from the inner lens in a horizontal direction and irradiates the light to the outside. 4. The vehicular lamp according to 1 or 2 or 3. 6. A prism element group formed of a part of a spherical convex surface for diffusing and emitting light incident from the concentric prism element group is provided on an outer surface of the inner lens, and the outer lens is transparent. 4. The vehicular lamp according to claim 1, wherein the diffused light from the inner lens is radiated to the outside. 7. The vehicular lamp of another function includes a lamp housing, an inner lens, and an outer lens which are separate from the lamp housing, the inner lens, and the outer lens. The inner surface is provided with a concentric prism element group, and the outer surface of the separate inner lens is formed of a part of a vertical cylindrical convex cylindrical surface, and diffuses light incident from the concentric prism element group in the horizontal direction. A prism element group for emitting light from the inner lens is provided, and the inner surface of the separate outer lens is formed of a part of a convex cylindrical surface having a horizontal axis. The vehicle lighting device according to claim 4, further comprising a prism element group that irradiates the vehicle lamp. 8. The vehicular lamp of another function includes a lamp housing, an inner lens, and an outer lens which are separate from the lamp housing, the inner lens, and the outer lens. The inner surface is provided with a concentric prism element group, and the outer surface of the separate inner lens is formed of a part of a convex cylindrical surface having a horizontal axis, and diffuses light incident from the concentric prism element group in the vertical direction. A prism element group for emitting light from the inner lens is provided, and the inner surface of the separate outer lens is formed of a part of a convex cylindrical surface having a vertical axis. The vehicular lamp according to claim 5, further comprising a prism element group for irradiating the vehicle lamp. 9. The vehicular lamp of another function includes a lamp housing, an inner lens, and an outer lens which are separate from the lamp housing, the inner lens, and the outer lens. A concentric prism element group is provided on the inner surface, and a prism element group which is formed of a part of a spherical convex surface and diffuses and emits light incident from the concentric prism element group is provided on the outer surface of the separate inner lens. 7. The vehicular lamp according to claim 6, wherein the separate outer lens is provided, and the diffused light from the separate inner lens is radiated to the outside. 10. The vehicular lamp of the other function includes a lamp housing and an outer lens integrated with the lamp housing and the outer lens, and also includes an inner lens separate from the inner lens. On the inner surface of the separate inner lens, a concentric prism element group is provided, and on the outer surface of the separate inner lens, a part of a vertical axis convex cylindrical surface is formed, and light is incident from the concentric prism element group. A prism element group for diffusing light in the horizontal direction and emitting the light is provided, and the inner surface of the integral outer lens is formed of a part of a convex cylindrical surface of a horizontal axis and vertically transmits light from the separate inner lens. The vehicular lamp according to claim 4, further comprising a prism element group that scatters light in a direction and irradiates the light to the outside. 11. The vehicular lamp of another function includes a lamp housing and an outer lens integrated with the lamp housing and the outer lens, and also includes an inner lens separate from the inner lens. On the inner surface of the separate inner lens, a concentric prism element group is provided, and on the outer surface of the separate inner lens, a part of a convex cylindrical surface having a horizontal axis is incident on the concentric prism element group. A prism element group that diffuses light in the vertical direction and emits the light is provided, and the inner surface of the integral outer lens is formed of a part of a vertical axis convex cylindrical surface and horizontally transmits light from the separate inner lens. The vehicular lamp according to claim 5, further comprising a prism element group that diffuses light in the direction and irradiates the light to the outside. 12. The vehicular lamp of another function comprises a lamp housing and an outer lens integral with the lamp housing and the outer lens, and also comprises an inner lens separate from the inner lens. The inner lens of the separate inner lens is provided with a concentric prism element group, and the outer surface of the separate inner lens is formed of a part of a spherical convex surface and diffuses light incident from the concentric prism element group. 7. A vehicle according to claim 6, further comprising a prism element group that emits light through the outer lens, wherein the integral outer lens is transparent and irradiates diffused light from the separate inner lens to the outside. Lights.