JPH087612A - Vehicular lighting fixture - Google Patents

Abstract

PURPOSE:To provide the sideward light distribution in a condition where a quantity of light in the front direction is secured in a vehicular lighting fixture whose light flux irradiating range is expanded. CONSTITUTION:In a vehicular lighting fixture, plural lamp chambers are arranged adjacently to each other. A bulb 10 is arranged so that a filament is situated in an almost focus position F of primary reflecting mirrors 9, and a secondary reflecting mirror 12 is oppositely formed to reflect a light flux from the filament to an opposite side lamp wall 6. Reflected light by this secondary reflecting mirror 12 is reflected in the direction for crossing the optical axis CL of the primary reflecting mirrors 9, and a tertiary reflecting mirror 13 having an almost flat-shaped reflecting mirror surface to further re-reflect a reflected light flux in the direction for crossing the optical axis CL of the primary reflecting mirrors 9 is oppositely formed, and the light distribution is obtained by the light flux sideward diffusing at a large inclination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle lamp having a plurality of lamp chambers adjacent to each other, such as a so-called combination vehicle lamp, which effectively utilizes a lamp wall that divides the lamp chambers to emit a light. Widely spread the diffusion angle of the light flux to the side of the lamp,
The present invention relates to a vehicular lamp with an expanded irradiation range.

[0002]

2. Description of the Related Art In a so-called combination type vehicular lamp 150 having a structure in which a plurality of function lamps such as a tail lamp and a back lamp are arranged in parallel, as shown in FIGS. A plurality of lamp chambers 153, 154 are defined by the extended lamp wall 152, each lamp chamber 153, 154 is covered with a front lens 155, and a reflector 15 formed on the rear surface of each lamp chamber 153, 154.
The bulbs 158 for lighting are arranged at the substantially focal point F positions of 6, 157 to obtain a predetermined light distribution.

By the way, in a vehicle lamp, for example, in a combination lamp having a structure in which a backup lamp is incorporated, it is obliged to ensure a light distribution in the left and right directions. It is set so that the irradiation range is secured at about 45 °, and light diffusion type vehicular lamps having various structures as described below are used.

That is, in the vehicle lamp shown in FIG.
By expanding the lamp chamber 153 that constitutes the backup lamp in the lateral direction (direction of arrow A) with respect to the front lens 155 (the initial position is indicated by a dashed line), the light flux emitted from the bulb 158 enters the front lens 155. It is configured so that a large angle can be formed. That is,
By increasing the lateral opening of the lamp chamber 153, the support position of the bulb 158 can be displaced in the direction of arrow B. Therefore, the maximum tilted outward with respect to the optical axis CL of the reflector 156 can be achieved. The inclined light flux L1 changes to L2,
The emission angle θ1 is expanded to θ2.

Further, as shown in FIG. 6 (a), there is also a vehicular lamp which is configured to expand the diffusion angle of the light flux by changing the size of the curvature of the lens step 159 formed in the front lens 155. . That is, the front lens 15
Diffusion-type lens steps 159, 15 formed on the inner surface of
By changing the curvature of 9 ... From the large one shown by the broken line to the small one shown by the solid line, the light flux L1 from the bulb (not shown) can be largely diffused up to the angle of L2.

Further, FIG. 6B shows a lens step for forming the front lens 155 in the vehicular lamp shown in FIG. 6A, which is a front irradiation lens step 159, 159 ...
And a prism step 160 for irradiating in the direction of about 45 °,
, 160 ... Are separately arranged, and the diffusion angle is enlarged by the light flux transmitted through the prism step 160 for side irradiation. That is, the light flux L3 that has passed through the side illumination prism step 160 is reflected by the front lens 155.
Since the light beam from the bulb (not shown) that has entered the prism step 160 formed in FIG. 6 is designed to be refracted in the direction of 45 °, the refracted light beam L3 irradiates the side. There is.

7 and 8, the vehicular lamp shown in FIGS. 7 and 8 positively utilizes the lamp wall 152 partitioning the plurality of lamp chambers 153 and 154 to reflect the luminous flux emitted from the bulb 158 to the lamp wall 152. In the former, an auxiliary reflecting mirror 161 for reflecting the light flux of the bulb 158 to the side is attached to the inner surface of the lamp wall 152, and the latter is the lamp. Light room 1 on the opposite side of wall 152
The auxiliary reflection surface 162 is formed so as to project into the inside 54.

[0008]

However, in the case of a vehicular lamp constructed as shown in FIG. 5, the lamp wall 15 is used.
Since it is necessary to largely move the position 2 to the side of the adjacent lamp chamber 154 as described above, there is a drawback that the vehicular lamp itself is restricted in design in relation to the size of the lamp mounting space for the vehicle. In the case of a method of enlarging the diffusion angle by changing the curvature of the lens step 159 formed on the front lens 155 as shown in FIG. 6A, since the curvature of the lens step 159 is large, L2 As described above, there is a drawback that the parallel light flux from the ordinary reflecting surface is also largely diffused and the light distribution amount in the central portion is insufficient. FIG. 6 configured to improve this point
In the case of (b), the lens steps of the front lens 155 are changed to the front irradiation lens steps 159, 159 ...
.. The side illumination prism steps 160, 160 ... Are separately arranged, so that the mold structure of the front lens 155 is not only complicated, but the weight of the front lens 155 itself is large, and the appearance is good. There was a problem that it was bad in terms of aspects. Further, like the vehicular lamp shown in FIGS. 7 and 8, the lamp wall 15 that partitions the lamp chambers 153 and 154.
2 has a structure in which an auxiliary reflecting mirror or an auxiliary reflecting surface is formed so as to project into the lamp chambers 153 and 154, and therefore the bulb 1 that reflects and emits at that portion by the reflectors 156 and 157
The front lens 15 that blocks the light flux of 58 and corresponds to that portion
5 has a defect that a dark part is formed and the appearance of the front lens 155 as a whole is deteriorated.

The present invention was devised in view of the above problems, and it is possible to obtain lateral light distribution while securing a light amount in the front direction, and to not affect the appearance of the lamp. An object of the present invention is to provide a vehicular lamp having a new structure and an expanded irradiation range.

[0010]

In order to achieve the above object, a vehicular lamp according to the present invention is a vehicular lamp in which a plurality of lamp chambers are provided adjacent to each other. A bulb is provided so that the filament is positioned on the opposite side, and a secondary reflecting mirror that reflects the light flux from the filament to the lamp wall on the opposite side is formed oppositely. Arrangement of a tertiary reflecting mirror having a substantially flat reflecting mirror surface that reflects in a direction intersecting the optical axis of the reflecting mirror and further reflects the reflected light flux in a direction intersecting the optical axis of the primary reflecting mirror. The idea is to have formed it.

The mirror surface of the secondary reflecting mirror may be a parabolic surface.

[0012]

In the above vehicular lamp, when the bulb is turned on, the light beam reflected by the primary reflecting mirror of the reflector becomes a forward irradiation light beam. Further, the luminous flux incident on the secondary reflecting mirror of the reflector enters the tertiary reflecting mirror configured on the lamp wall opposite to the secondary reflecting mirror, and is irradiated with a predetermined reflection angle. A light flux having a tilt angle is formed laterally so as to intersect with the light on the first reflecting mirror surface.

In the so-called combination type lamp which constitutes the backup lamp, the light beam inclined to the side forms a light distribution pattern which is widely irradiated in the backward direction of the vehicle. By designing the tertiary reflecting mirror, it becomes possible to easily design the size of the diffusion angle.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicular lamp according to the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the basic structure of a vehicular lamp according to the present invention.
Reference numeral 1 denotes a lamp body that constitutes two lamp chambers 2 and 3 that are adjacent to each other horizontally. The front lens 4 is covered in the front opening of both lamp chambers 2 and 3, and the sealing leg 4a is attached to the lamp body. Fitted in the seal groove 1a formed on the 1 side with an adhesive 5 or the like,
This is a so-called combination type in which the front shape is substantially horizontally long, and the lamp chamber 2 on one side is configured as, for example, a backup lamp and the lamp chamber 3 on the other side is configured as a turn signal lamp. It is a lamp.

The two lamp chambers 2 and 3 are partitioned by a lamp wall 6, and reflectors 7 and 8 are formed at the rear portions of the lamp chambers 2 and 3, respectively. In the illustrated embodiment, the reflector 7 on the lamp chamber 2 side has a primary reflecting mirror 9 formed in the rear part thereof around the optical axis CL of the reflector 7 and a bulb socket in which the bulb 10 is replaceably attached to the rear part. 11 is fixed. Further, a secondary reflecting mirror 12 having a parabolic surface having a filament position of the bulb 10 as a focal point F is formed in a portion extending laterally of the lamp body 1 facing the inside of the lamp chamber 2 and the adjacent lamp chambers are formed. A substantially flat tertiary reflecting mirror 13 that optically corresponds to the secondary reflecting mirror 12 is formed inside the lamp wall 6 that divides the lamp 3, and the luminous flux from the secondary reflecting mirror 12 is first The reflecting mirror 9 is constructed so that it can be reflected at an angle of approximately 45 ° laterally inclined with respect to the optical axis CL. Each of the secondary reflecting mirrors 9, 12 and 13 has a metal reflection film formed by aluminum vapor deposition on the surfaces of the reflector portions 7 and 8 and the lamp chambers 2 and 3, respectively. In addition, it goes without saying that an inner lens made of synthetic resin such as red or amber can be provided in the desired lamp chamber 2 or 3 in order to obtain illumination light of a predetermined functional color as a vehicle lamp. Nor. Further, it goes without saying that a light diffusing structure such as a diffusing step can be formed at a predetermined portion of the front lens 4 in order to appropriately diffuse and emit the direct light flux from the bulb 10.

The reflector 8 formed in the rear part of the other adjacent lamp chamber 3 is also provided with a reflecting mirror 14 having a parabolic surface at the rear part thereof, and the parabolic reflecting mirror 14 has a bulb at a substantially focal position F. A valve socket 1 which carries a replaceable valve 15 at the rear of the reflector 8 so that 15 is located.
It has a structure in which 6 is fixed.

In the vehicular lamp having the above structure,
When the bulb 10 is turned on, the light flux of the bulb 10 is reflected by the primary reflection mirror 9 of the reflector 7 and passes through the front lens 4 to become a front irradiation light flux L1.

Further, the light flux incident on the secondary reflecting mirror 12 of the reflector 7 is a parallel light flux because the secondary reflecting mirror 12 forms a parabolic surface having the position of the bulb 10 as a substantially focal point F. And enters the third reflecting mirror 13 formed on the lamp wall 6 that forms a boundary with the adjacent lamp chamber 3. Since the tertiary reflecting mirror 13 forms a substantially flat mirror surface, the light flux incident on the tertiary reflecting mirror 13 is reflected at the same reflection angle as the incident angle and transmitted through the front lens 4. Thus, a parallel light beam L2 having an inclination angle of about 45 ° with respect to the optical axis CL of the primary reflecting mirror 9 is formed.

A parallel light beam L2 inclined at approximately 45 degrees to the side
Is a rear combination type vehicular lamp that illuminates the sides behind the vehicle, improves visibility of obstacles and the like behind the vehicle, and improves alertness to pedestrians passing near the vehicle. To form a light distribution pattern. In the above embodiment, the secondary reflecting mirror 12 is constituted by a paraboloid whose focal point F is at the position of the bulb 10. However, by designing the secondary reflecting mirror 12 in various ways, the light flux L2 radiated laterally The light distribution pattern can be controlled in a preferred direction.

Further, in the present embodiment, the lamp wall 6 forming the tertiary reflecting mirror 13 facing the secondary reflecting mirror 12 is inclined slightly outward with respect to the optical axis CL of the primary reflecting mirror 9. Is designed so that the mold from the reflector 7 formed on the lamp body 1 can be easily pulled out, and the inclination angle of the third reflecting mirror 13 formed on the lamp wall 6 to the outside can be controlled. By changing the angle, the angle of the inclined light beam L2 emitted from the front lens 4 can be changed and adjusted according to the function of the lamp (the irradiation angle of the light beam 12 is twice as large as the change angle of the lamp wall 6). It is possible to increase the diffusion angle of the light flux. The vehicular lamp according to the present invention can also be implemented as a structure for illuminating a road shoulder direction or the like in a headlight or the like to improve visibility for a pedestrian.

FIGS. 2 to 4 show a second embodiment in which the vehicular lamp according to the present invention is applied to a rear combination type vehicular lamp in which a plurality of function lamps are arranged in two layers. 2 is a front view, FIG. 3 is a sectional view taken along the line C-C in FIG. 2, and FIG. 4 is a sectional view taken along the line D-D in FIG. The vehicular lamp according to the present embodiment has a lamp chamber 22 (see FIG. 3) forming a so-called tail-and-stop lamp in the upper part of a lamp body 21 having a single structure, and a so-called turn signal lamp and a backup lamp in the lower part. The lamp body 23 has a structure in which the constituent lamp chambers 23, 24 (see FIG. 4) are arranged side by side. The lamp body 21 forms the lamp chambers 22, 23, 24.
A front lens 25 covering the entire surface is attached to the front opening of each of the lamp chambers 22 inside the front lens 25.
Corresponding to 23 and 24, the inner lens 26, 27 and 28 of predetermined color for emitting light as a functional lamp is interposed.

The reflector 29 formed at the rear portion of the upper lamp chamber 22 side has an optical axis C directed to the rear of the vehicle on its inner surface.
A primary reflecting mirror 30a is formed around L, and a secondary reflecting mirror 30b is formed so as to be continuous with the primary reflecting mirror 30a so as to incline the optical axis CL toward the outer rear portion of the vehicle, and the secondary reflecting mirror 30b. A multi-reflecting mirror 30 composed of a third reflecting mirror 30c formed on the inner wall extending inclining forward to the front of the lamp body 21 in succession to the secondary reflecting mirror 30b constitutes a multi-reflecting mirror 30, and a rear portion of the primary reflecting mirror 30a. Is fixed to a valve socket 32 which is replaceably attached so that the filament of the bulb 31 is located at a substantially focal point F position on the optical axis CL, and the auxiliary is located outside the vehicle rear portion of the multiple reflection mirror 30. A partition wall 34 that constitutes the lamp chamber 33 and partitions the auxiliary lamp chamber 33 from the lamp chamber 22.
An auxiliary reflecting mirror 35 is formed on the inner surface of the
A bulb 36 for illuminating the inside of the auxiliary lamp chamber 33 is attached to the rear portion of the vehicle so that the optical axis L of the bulb 36 can be tilted toward the outside of the rear portion of the vehicle. A rear reflex reflector 37 is fixed inside the inner lens 26 on the front surface of the secondary reflecting mirror 30b on the side of the lamp chamber 22, and a rear side reflector 38 is attached on the inner surface of the inner lens 26 on the side of the auxiliary lamp chamber 33. And valve 3 each
It has a structure that internally illuminates when 1 and 36 are lit. In addition, a standing wall 25a is provided upright inside the front lens 25 where the side portion of the rear reflex reflector 37 is located, so that it is possible to clearly show the section of the illuminated portion when the bulb 31 is turned on. is there.

Therefore, when the bulb 31 is turned on, the light reflected by the primary reflecting mirror 30a is emitted as a substantially parallel light flux L1 which is directed toward the front of the lamp chamber 22, and the secondary reflecting mirror 3 is also provided.
0b and the reflected light L2 from the third-order reflecting mirror 30c are refracted in the direction of the rear reflex reflector 37 and uniformly illuminate the rear reflex reflector 37. At this time, the light beam L3 reflected by the inner surface of the lamp wall 34 that defines the auxiliary lamp chamber 33 on the lamp chamber 22 side is refracted and reflected toward the rear reflex reflector 37, and has the effect of supplementing the illumination light of that portion. Further, a part of the illumination light of the bulb 36 that is turned on at the same time is reflected toward the rear side reflex reflector 38 side by the auxiliary reflecting mirror 35 formed on the inner wall of the auxiliary lamp chamber 33, and the reflected light L1 and the illumination light of the bulb 36 cause the rear side. The reflex reflector 38 is internally illuminated.

The structure of the lower side 23, 24 shown in FIG.
The structure is substantially the same as the lamp structure described in detail as the first embodiment.
Therefore, only the parts different from the first embodiment will be described. The two lamp chambers 23 and 24 are located below the lamp body 21,
That is, the lamp chamber 2 forming the tail and stop lamp
2 are arranged side by side in a row side by side in the lower part of the lamp 2. The front openings of both lamp chambers 23 and 24 are covered with a front lens 25 common to the lamp chamber 22, and inner lenses are respectively provided inside thereof. 27 and 28 are interposed, and the one lamp chamber 23 functions as a backup lamp and the other lamp chamber 24 functions as a turn signal lamp. Therefore, the inner lens 27 interposed on the side of the lamp chamber 23
Is basically made of uncolored synthetic resin material, and the inner surface is subjected to a diffusion step.
The inner lens 28 provided on the fourth side is formed of a synthetic resin material colored in amber or the like, and the inner surface is similarly subjected to a diffusion step.

The two lamp chambers 23 and 24 are partitioned by a lamp wall 39, and reflectors 40 and 41 are formed at the rear portions of the lamp chambers 23 and 24, respectively. In the present embodiment, a primary reflecting mirror 42 is formed around the optical axis CL of the reflector 40 at the rear portion of the reflector 40 on the lamp chamber 23 side, and the primary reflecting mirror 42 is substantially above the optical axis CL. A valve socket 44 is fixedly installed so that the filament of the bulb 43 is located at the focal point F. Further, a secondary reflecting mirror 45 having a parabolic surface with the bulb 43 at a substantially focal point F is formed in a portion extending laterally of the lamp body 21 facing the inside of the lamp chamber 23, and the adjacent lamp chamber 24 is formed.
A substantially flat tertiary reflecting mirror 46 that optically corresponds to the secondary reflecting mirror 45 is formed on the inside of the lamp wall 39 that divides the The reflecting mirror 42 is constructed so that it can be reflected at an angle of approximately 45 ° laterally inclined with respect to the optical axis CL. In this embodiment, the bulb 43 is mounted so that the mounting direction of the optical axis L thereof is slightly outside the optical axis CL of the primary reflecting mirror surface 43, that is, toward the rear outside of the vehicle. The lamp wall 39 forming the reflecting mirror 46 is formed so as to widen the opening width toward the opening side of the lamp body 21, and facilitates the detachment of the mold when molding the lamp body 21, and
The light L2 reflected by the secondary reflecting mirror 45 can be effectively emitted to the outside of the lamp chamber 23.

Also, with respect to the reflector 41 formed in the rear part of the other adjacent lamp chamber 24, a reflecting mirror 47 having a parabolic surface is formed in the rear part thereof, and the optical axis CL of the reflecting mirror 47 is formed.
The filament of the bulb 48 is located at a substantially focal position F above, and a bulb socket 49 is fixedly mounted so that the mounting direction of the optical axis L of the bulb 48 is slightly inclined to the optical axis CL of the reflecting mirror 47. It is made up of structures. Regarding the lamp wall 50 formed on the side of the vehicle in the lamp chamber 24,
In order that the illumination light of the bulb 48 can be effectively emitted, the tip of the lamp wall 50 is cut off along the emission direction of the light flux so that a dark portion is not formed on the front lens.

[0027]

Since the vehicular lamp according to the present invention is configured as described above, the lamp wall that divides the lamp chamber, which is not used in light distribution in the ordinary vehicular lamp, is used as the reflecting mirror surface, and Since it is possible to obtain the light flux diffused toward one side, it is possible to properly and easily design the light distribution pattern required for the functional lamp. Also, since the structure uses the light flux reflected by the lamp wall, it becomes possible to increase the diffusion (tilt) angle of the light flux, and it is not necessary to increase the diffusion angle by the lens step of the inner lens or the front lens, The light distribution in the central part of the lamp can also be handled with a relatively small light flux reflecting surface. Further, since it is possible to greatly control the inclination of the light flux, it is not necessary to laterally expand the lamp chamber, so that there is no restriction on the design of the lamp, and the appearance at the time of lighting is not adversely affected. The advantages obtained by implementing the present invention are extremely large.

[Brief description of drawings]

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

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

FIG. 3 is a sectional view taken along line CC in FIG.

FIG. 4 is a sectional view taken along line DD in FIG.

FIG. 5 is a plan sectional view of an essential part showing the structure of a conventional vehicle lamp.

FIG. 6 is an enlarged sectional view of an essential part showing the shape of a lens step of a front lens that is also configured in a conventional vehicle lamp,
(A) shows an example in which the curvature of the lens step is changed, and (b) shows an example in which a lens step for front illumination and a prism step for side illumination are used together.

FIG. 7 is a plan sectional view of an essential part showing the structure of a conventional vehicle lamp.

FIG. 8 is a cross-sectional plan view of relevant parts showing the structure of a conventional vehicle lamp.

[Explanation of symbols]

 1 Lamp Body 2 Lamp Room 3 Lamp Room 4 Front Lens 6 Lamp Wall 7 Reflector 8 Reflector 9 Primary Reflector 10 Valve 12 Secondary Reflector 13 Third Reflector 15 Valve 21 Lamp Body 22 Lamp Room 23 Lamp Room 24 Lamp Room 25 Front Lens 26 Inner Lens 27 Inner Lens 28 Inner Lens 30 Multiple Reflector 31 Bulb 39 Light Wall 40 Reflector 41 Reflector 42 Primary Reflector 43 Valve 45 Secondary Reflector 46 Third Reflector 47 Free Object reflector 48 bulb L optical axis of bulb CL optical axis of reflector L1 forward irradiation light flux L2 side irradiation light flux

Claims (3)

[Claims] 1. A vehicular lamp having a plurality of lamp chambers adjacent to each other, wherein a bulb is provided so that a filament is located at a focal position of a primary reflecting mirror, and a light beam from the filament is provided on the opposite side. A secondary reflecting mirror that reflects the light on the lamp wall is formed oppositely,
The reflected light from the secondary reflecting mirror is reflected in a direction intersecting the optical axis of the primary reflecting mirror, and the reflected light flux is further reflected again in a direction intersecting the optical axis of the primary reflecting mirror. A vehicle lamp characterized in that a third reflecting mirror having a flat reflecting mirror surface is arranged and formed. 2. The vehicular lamp according to claim 1, wherein the mirror surface of the secondary reflecting mirror forms a parabolic surface, and the secondary reflecting mirror constitutes a part of the lamp body. . 3. The vehicular lamp according to claim 2, wherein the mirror surfaces of the primary reflecting mirror and the tertiary reflecting mirror are metal reflecting surfaces.