JP2875153B2 - Combination lamp for automobile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination lamp for a motor vehicle in which an outer lens which extends sideways is disposed at the front of a left and right adjacent lamp room defined in a lamp body by a partition wall.

[0002]

2. Description of the Related Art FIGS. 7 and 8 show a combination headlamp which is an example of a conventional lamp of this type. A lamp body 1 has a headlamp unit 2 including a reflector 2a and a bulb 2b. A lamp 5b for a position lamp is provided adjacent to the front lens 3 and a front lens 3 that is inclined in a shape in which a side edge corresponding to the outside in the vehicle width direction is inclined rearward is attached to a front opening of the lamp body 1. Have been. Reference numeral 6 denotes a partition wall extending forward from the lamp body 1 and defining a lamp chamber adjacent to the left and right inside the lamp body 1. The tip of the partition wall 6 has ribs 7 formed on the rear surface of the front lens 3. Light is prevented from being mixed between the head lamp and the position lamp by engaging with the engaging recess. That is, at the boundary between the head lamp and the position lamp, the space between the respective lamp chambers is shielded from light by the partition wall 6 so that the boundary between the light emitting areas of the respective lamps in the front lens 3 becomes clear.

[0003]

In the above-mentioned prior art, light leakage between adjacent lamp rooms is reliably prevented by the partition 6. However, the front lens 3 is provided with the front end of the partition 6. A wide rib 7 for engagement is formed, and there is a problem in that the rib 7 can be seen through the front lens 3 when it is not lit, so that the appearance is poor.

The front lens 3 is provided with an optical axis L _{0 of the} bulb 5b.
Is largely inclined with respect to a direction (see reference numeral L ₁ ) orthogonal to the front lens 3, the light on the position lamp side is guided to the head lamp side by the light guiding action of the front lens 3 when the position lamp is turned on, and There is also a problem that the boundary area between the two lamps is blurred and the appearance is poor. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the related art, and has as its object to provide an automobile in which a boundary area between adjacent lamps having different functions defined by partition walls is inconspicuous when not lit, but is sharp when lit. To provide a combination lamp for a vehicle.

[0005]

According to a first aspect of the present invention, there is provided a combination lamp for an automobile, wherein a side edge of the front side of the lamp body, which is closer to the outside in the vehicle width direction, is turned sideways. The front of each of the lamp chambers defined on the left and right inside the lamp body by the partition is covered with outer lenses that have vertically elongated cylindrical steps continuously formed on the left and right, and the functions inside the lamp chamber are different. In a combination lamp for an automobile in which a light source of a lamp to be accommodated is accommodated, a partition defining the lamp chamber is extended to a position substantially approaching an outer lens, and the outer lens corresponds to a lamp chamber closer to an outer side in a vehicle width direction of the outer lens. The curvature (diffusion angle) of the cylindrical curved surface of the step element in the region near the partition wall in the region where the The curvature of the cylindrical curved surface of the step element position is obtained so as to be larger than (diffusion angle).

[0006]

The distal end of the partition extends to a position near the outer lens, thereby preventing light leakage between adjacent lamp rooms. Also, unlike the conventional structure, the outer lens side does not have an engagement concave portion that engages with the distal end of the partition wall.
At the time of non-lighting, the tip of the narrow partition wall can be slightly seen through the outer lens, but its existence can hardly be discriminated by the cylindrical step formed on the back surface of the outer lens and having a large diffusion angle, and the appearance is not bad.

[0007] Further, since the side edge of the outer lens wraps around to the side, the light incident on the outer lens at the time of lighting is repeatedly reflected by the outer lens surface (interface with air). A light guiding action occurs in which the light is guided along the light source. Due to this light guiding action, a large curvature (diffusion angle) is formed in the region near the partition wall on the back side of the outer lens for light heading toward the adjacent lamp room in the outer lens. Since the incident angle on the cylindrical curved surface (the incident angle with respect to the interface between the cylindrical curved surface and the air) is equal to or smaller than the critical angle, a part of the light traveling toward the adjacent lamp room passes through the cylindrical step (cylindrical curved surface), Is reflected by the cylindrical curved surface, and the reflected light from the cylindrical curved surface is transmitted to the interface with the air on the front side of the outer lens. Since elevation angle is less than the critical angle, the reflected light is emitted to the outer lens front without being reflected by the interface between the air.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 6 show a first embodiment of the present invention. FIG. 1 is a front view of a combination headlamp for a vehicle (a headlamp on the right side of the vehicle when the front end of the vehicle is viewed from the front). Is a horizontal sectional view of the headlamp (a sectional view along line II-II shown in FIG. 1), and FIGS. 3 and 4 are longitudinal sectional views of the headlamp, respectively, taken along a line III shown in FIG.
5 is an enlarged horizontal sectional view of the front lens showing the curvature of the cylindrical curved surface of the step element of the cylindrical step formed on the lens. FIG. 6 is a sectional view taken along the front lens. FIG. 4 is an explanatory diagram illustrating an operation of a cylindrical step element that emits light out of a lens.

In these figures, reference numeral 10 denotes a container-shaped lamp body that opens forward, and a transparent front lens 11 that is an outer lens is attached to the front opening.
A lamp room space curved from the front side to the side is formed.
The lamp body 10, consists of the parabolic reflector 22 and the valve 24. a head lamp body 20 having an axle that is parallel optical axis L _2, lamp chamber region of the clearance lamp 5
Consists 0a and a valve 34. consists of a clearance lamp body 30 having an optical axis L ₂ parallel to the optical axis L ₃ of the head lamp body 20, a turn signal lamp of the lamp chamber region 50b and the valve 44, the head lamp body and the turn signal lamp main body 40 having an optical axis L ₂ parallel to the optical axis L ₄ are juxtaposed.

A head lamp body 20 housed in a head lamp room S ₂ formed in the lamp body 10 has a bulb 24 having double filaments 24 a and 24 b in a bulb insertion hole of a parabolic reflector 22. Is inserted, and a shade 24c that blocks a part of the light emitted from the bulb around the bulb 24 and contributes to the formation of the passing beam
Is provided, the traveling beam and the passing beam can be formed alternatively. Front lens 1
In the region B corresponding to the first lamp chamber S _2, as shown in FIGS. 2, 3, 5, convex cylindrical steps 12 on the outside is a light distribution control step is formed, a reflector 2
The light of the bulb 24 reflected by 2 is diffused and distributed by the cylindrical step 12 to form a predetermined light distribution pattern.

The reflector 22 is supported by two aiming screws 25 and 26 and one ball joint 27 so as to be tiltable with respect to the lamp body 10. That is, the aiming screw 25 (26) rotatably supported by the rear wall of the lamp body 10 and extending forward and backward is:
The heads are screwed into nuts 25a (nuts to which the screws 26 are screwed are not shown) fitted to brackets extending to the rear side of the reflector 22, and the aiming screws 25 and 26 are rotated. lamp body 20 is horizontal axis Lx, respectively tilted to the vertical axis Ly (see Fig. 1) around which the tilting adjusting the irradiation direction of light from the head lamp body 20 (headlamp optical axis L ₂₎ in the vertical and horizontal be able to. Reference numeral 27a denotes a ball portion fixed to the lamp body 10, and reference numeral 27b denotes a bearing portion fitted to a bracket extending from the reflector 22 to support the ball portion 27a. The ball portion 27a and the support portion 27b
These form a ball joint 27.

Reference numeral 50 denotes a clearance lamp lamp room S.
₃ and a lamp chamber forming member that forms the lamp chamber S ₄ of the turn signal lamp. The lamp chamber forming member is housed between the lamp body 10 and the front lens 11 and has a right end provided in the lamp body 10 when viewed from the front. It is inserted and fixed in the groove 10a via a leaf spring-like stopper member 70, and the left end is screwed to the lamp body 10 by a fixing screw 72. The lamp chamber forming member 50, lamp chamber to also open forward are formed with container-like lamp chamber region 50a which opens forward to form a lamp chamber S ₃ of the clearance lamp, the lamp chamber S ₄ of the turn signal lamp The region 50b is provided adjacent to the region 50b. Also, between the two light room areas 50a and 50b,
A partition 50c defining left and right adjacent lamp chambers S ₃ and S ₄ is provided. This partition 50c extends forward to a position approaching the front lens 11 to form the respective lamp chambers S ₃ and S _4.
Light does not leak from each other. In addition, the surface of the lamp chamber forming member 50 is subjected to aluminum vapor deposition and functions as a reflector for a clearance lamp and a turn signal lamp.

Holes 5 are formed in the rear walls of the lamp room areas 50a and 50b.
3, 55 is opened and the bulb on the back wall of the lamp body 10
The valves 34 and 44 inserted in the insertion holes are used for these holes 5.
It protrudes forward from 3,55. Clearance lamp
The rear wall of the lamp body 10 corresponding to the main body 30 is shown in FIG.
Projecting forward as shown by reference numeral 10b, this projecting
A lamp insertion hole is provided in the portion
Sufficient space is provided at the rear of the unit 10. And
The rear wall of the clearance lamp area 50a is flat.
The valve extends almost vertically at the front of the substantially vertical rear wall.
A multiple reflector 51 that reflects the 34 light and converts it into parallel light
Is formed, and the light of the bulb 34 is reflected by this multiple reflection.
The light is reflected by the lens 51 and becomes substantially parallel light.
1 Lighthouse S _ThreeCorresponding area A₆Diffusion step formed in
The light is diffused right and left by the light 13 and distributed forward.

On the other hand, the lamp room area 5 of the turn signal lamp
The back wall of Ob constitutes a parabolic reflector 52, and the light of the bulb 44 is distributed forward by the reflector 52, and is reflected by the surface (aluminum-deposited reflecting surface) of the partition 50c to the side. Is also distributed. Of course, the light that passes through the front lens 11 and travels forward and sideways is
The light is diffused in the left-right direction by the cylindrical steps 14 formed in the areas A _{0 to} A ₅ of the front lens 11 corresponding to the lamp room S ₄ . Reference numeral 45 denotes an amber glove fixed so as to be engaged with the hole 55. Light from the bulb 44 passes through the glove 45 to become amber-colored light.

Since the cylindrical steps 12, 13, and 14 formed on the back surface of the front lens 11 are formed so as to be connected in the left-right direction at substantially the same pitch, the cylindrical steps 12 appearing on the front lens 11 when not lit are turned on. , 13 and 14 have a uniform appearance in the design of the parting lines and look very good. In the area of the front lens 11 corresponding to the lamp chambers S ₃ and S ₄ , an outwardly convex cylindrical step 1 for diffusing outgoing light to the left and right is provided.
3,14 Although are formed continuously in the lateral direction, cylindrical steps 14 formed in a region corresponding to the lamp chamber S ₄ is stronger curvature of the cylindrical curved surface of each step element (diffusion angle) of quantity of light It is set so that the larger the part, the larger. That is, the area A ₀ facing the optical axis L ₄ of the bulb 44 is the most light-emitting surface of the clearance lamp in the front lens 11 due to the direct light from the bulb 44 and the reflected light from the parabolic reflector 52. This is a portion where the strength is increased, and the radius of curvature of the cylindrical curved surface of the step element in the valve facing area A ₀ is 5.6.
is a mm, toward the horizontal direction from the valve confronting region A _0, valve area near the radius of curvature 6.4mm indicated by a symbol A _1, middle region of the curvature radius 6.9mm indicated at A _2, symbol A so on valve farthest region of the curvature radius 9.0mm indicated by valves far region and code a ₄ of the radius of curvature 8.2mm indicated by _3, cylindrical curved surface of the step elements as the distance to the left and right from the optical axis L ₄ of the valve 44 Has a large curvature (small radius of curvature). Light having a high intensity in the vicinity of the valve 44 is diffused widely in the left-right direction, and light having a small intensity at a distance from the valve 44 has a small degree of lateral diffusion. in the region corresponding to the lamp chamber S ₄ of the front lens 11 (whole light-emitting surface of the turn signal lamp) emits light at intensity uniform, i.e., saw the turn signal lamp from any direction So that the look in substantially the same brightness even in the case.

The fact that the curvature of the cylindrical curved surface of the cylindrical step in the clearance facing area A ₀ (B ₀ ) of the clearance lamp and the headlamp is larger than the other area (small radius of curvature) means that the bulb 44 (2).
4) is also effective in preventing see-through. In the area corresponding to the lamp chamber S ₄ of the outer lens 11, the curvature of the cylindrical curved surface of the step element of the partition wall 50c near the region indicated by symbol A ₅ of the cylindrical step, other regions (A ₀ ~A ₄₎ in step elements (The radius of curvature is R = 4.0).
mm), and the light on the turn signal lamp side guided through the front lens 11 to the clearance lamp side by the light guiding action of the curved front lens 11 is positively emitted to the front or back side of the front lens 11. It has become. That is, the region corresponding to the lamp chamber S ₄ of the front lens 11, since the greater inclination with respect to the form that is orthogonal to the optical axis L ₄ of the valve 44 and the reflector 52, the light incident on the front lens 11, FIG. 6 As shown by the solid line,
The total reflection is repeated between the front surface (interface with air) of the front lens 11 and the cylindrical surface (interface with air) of the cylindrical step 14, and the lamp chamber S inside the front lens 11.
A light guiding action occurs in which the light is guided to the _three sides.

However, the interior of the front lens 11 is_Three
The light going to the side, as shown by the broken line in FIG.
Part of the area near the partition (A_FiveArea) curvature
Large (small radius of curvature) cylindrical step
Through the cylindrical surface of
The front lens 11 is reflected by the cylindrical curved surface.
Surface (interface with air) F₀Of incident light to
Since the angle of incidence θ is greatly reduced and becomes less than the angle of view, the light
Front surface (interface with air) F of surface lens 11 ₀Reflected in
The light is emitted outside the front lens 11 without being performed. That is, before
Due to the light guiding action of the surface lens 11, the interior of the front lens
_ThreeLight going to the side is the lighthouse S_ThreeFront guide without being guided to the side
Out of the lens 11 (back or front side of the lens 11)
You.

Therefore, the white of the clearance lamp and the amber color of the turn signal lamp are not mixed in the boundary area between the clearance lamp and the turn signal lamp, and the inside of the front lens 11 is partitioned by the light guiding action of the front lens 11. the light guided to the vicinity area a _5, from being emitted forward by cylindrical steps in this area a _5, and the light emission amount is increased in this region a _5, a boundary zone between the clearance lamp becomes clearer .

[0019] bulkhead neighboring region (A ₅ region) to the curvature radius of the cylindrical curved surface of the cylindrical steps of (a region corresponding to the lamp chamber S ₃₎ A ₆ area adjacent the 15m
In m, curvature compared to the radius of curvature 4mm cylindrically curved surface of the partition wall near the region (A ₅ region) is considerably smaller. This light within the lens is guided to A ₆ region without being emitted to the lens outer In A ₅ area, as shown in FIG. 6 code L _30, positively to the total reflection, i.e. positively guided By performing the action, the amber light of the turn signal lamp is prevented from being emitted forward in the vicinity (A ₆ ) of the vicinity of the clearance lamp partition wall, thereby suppressing an increase in the amount of light emission in the vicinity of the clearance lamp partition wall. The border between the ramp and the turn signal ramp is sharper.

In the above embodiment, the diffusion step formed on the front lens 11 has been described as the cylindrical step 14 having a convex surface, but may be a cylindrical step having a concave surface.

[0021]

As is apparent from the above description, according to the vehicle combination lamp of the present invention, the left and right lamp chambers are defined, and the light leakage between the adjacent lamp chambers is prevented. Since the tip of the partition is located close to the outer lens, the narrow partition tip can be seen slightly through the outer lens when not lit, but the presence of the partition can be determined by the cylindrical step with a large diffusion angle. The appearance is better.

Further, a part of the light traveling toward the lamp room adjacent to the inside of the outer lens due to the light guiding action is part of the cylindrical curved surface of the cylindrical step having a large curvature (diffusion angle) formed in the region near the partition wall on the back side of the outer lens. The reflected light is partially reflected by the same curved surface, and the angle of incidence of this reflected light on the interface with the air layer on the outer lens front side becomes equal to or less than the critical angle, and the light is emitted forward of the outer lens without being totally reflected. In addition, the light emitting portions of two adjacent lamps are sharpened without mixing in the boundary region, and the visibility is improved.

[Brief description of the drawings]

FIG. 1 is a front view of a combination headlamp for an automobile according to an embodiment of the present invention.

FIG. 2 is a horizontal sectional view of the headlamp (the line II shown in FIG. 1).
Sectional view along -II)

FIG. 3 is a vertical sectional view of the headlamp (line III shown in FIG. 1).
Sectional view along -III)

FIG. 4 is a vertical sectional view of the headlamp (a line IV-
Sectional view along IV)

FIG. 5 is an enlarged horizontal sectional view of a front lens showing a curvature of a cylindrical curved surface of a step element of a cylindrical step formed on a lens;

FIG. 6 is an explanatory diagram for explaining the operation of a cylindrical step element for emitting light guided into the front lens to the front of the lens;

FIG. 7 is a horizontal sectional view of a conventional combination lamp.

FIG. 8 is an enlarged horizontal sectional view showing a main part of the lamp.

[Explanation of symbols]

10 lamp body 11 which is the light source of the front lens 34 clearance lamp is outer lens valves 44 turn signal lamp bulb 50 lamp chamber forming member 50a is a light source, defined by 50b lamp chamber region 50c partition wall S _3, S ₄ bulkhead and lamp chamber L ₃ clearance lamp optical axis L ₄ turn signal lamp optical axis a ₅ cylindrical partition wall region near the curvature of the cylindrical curved surface is larger than the curvature of the cylindrical curved surface of the other steps element step element of the valve of the valve a ₀ of the front lens valve and directly opposite region

──────────────────────────────────────────────────続 き Continued on the front page (56) References Japanese Utility Model 1-160603 (JP, U) Japanese Utility Model 1-168906 (JP, U) Japanese Utility Model 6-28914 (JP, U) Japanese Utility Model 4- 8307 (JP, U) Japanese Utility Model 62-176906 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F21Q 1/00 B60Q 1/26 F21M 3/12

Claims (1)

(57) [Claims] An outer lens whose side edge, which is closer to the outside in the vehicle width direction, is turned sideways at the front opening of the lamp body, and each of the lamp chambers defined on the left and right inside the lamp body by a partition wall. A combination lamp for automobiles, the front surface of which is covered with an outer lens having vertically elongated cylindrical steps formed continuously on the left and right, and light sources of lamps having different functions are accommodated in the lamp chamber, wherein a partition wall defining the lamp chamber is provided. Is extended to a position substantially approaching the outer lens, and the curvature (diffusion angle) of the cylindrical curved surface of the step element at a position near the partition wall in a region corresponding to the outer side of the outer lens in the vehicle width direction is equal to that of the lamp chamber. The curvature (diffusion angle) of the cylindrical curved surface of the step element at another position of the corresponding region is made larger. Automotive combination lamp.