JP2004111180A - Lighting tool for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an appearance from getting worse by an lower surface of a top-side reflector reflected to a lower-side reflector. <P>SOLUTION: With the lighting tool 1 for the vehicle with two reflectors 12, 18 each separately equipped with a light source 16, 21 arranged at top and bottom, the lower-side reflector 18 set in free turning, a surface treatment such as a reflective surface treatment and a diffused reflection surface treatment are applied to the underside 12c' of the top-side reflector 12 . An appearance is never worsened since an underside of the top-side reflector with the surface treatment is reflected on an inside face of a bottom part of the lower-side reflector. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a novel vehicle lamp. More specifically, the present invention relates to a technique for improving the appearance of a vehicular lamp in which two reflectors are arranged vertically and a lower reflector is rotatable.
[0002]
[Prior art]
There is a vehicular lamp including two reflectors arranged vertically and a lower reflector being rotatable. For example, the lower reflector is rotated left and right in conjunction with the steering operation, and the light distribution is swung to the left and right to illuminate the road surface etc. in the traveling direction as soon as possible to ensure traveling safety. Also, there is a type in which lower reflectors are turned outward when entering a garage, for example, to make it easier to confirm surrounding people, obstacles, and the like.
[0003]
[Problems to be solved by the invention]
By the way, in the vehicle lamp having the two reflectors arranged in the upper and lower stages, when the lower reflector is rotated left and right, the lower surface of the upper reflector is reflected on the inner surface of the lower portion of the lower reflector and looks good. There is a problem that it becomes worse.
[0004]
Accordingly, it is an object of the present invention to prevent the lower surface of the upper reflector from being reflected on the lower reflector, thereby preventing the appearance from being deteriorated.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the vehicle lamp of the present invention is one in which a lower surface of an upper reflector is subjected to a surface treatment.
[0006]
Therefore, in the vehicle lighting device of the present invention, the lower treated surface of the upper reflector is reflected on the inner surface of the lower portion of the lower reflector, so that it is not difficult to see.
[0007]
Further, in order to solve the above-mentioned problem, another vehicle lamp of the present invention has a lower inner surface of a lower reflector as a diffuse reflection surface.
[0008]
Therefore, in another vehicle lighting device of the present invention, the lower surface of the upper reflector does not appear in the lower inner surface of the lower reflector in an overt state, and thus the appearance is not impaired.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a vehicular lamp of the present invention will be described with reference to the accompanying drawings. In the illustrated embodiment, the present invention is applied to a headlight for an automobile.
[0010]
1 to 6 show a first embodiment of a vehicular lamp according to the present invention.
[0011]
The automotive headlamp 1 includes a lamp body 3 having a concave portion 2 opened on the front surface. The opening 3a of the lamp body 3 is covered by a transparent front cover 4 (see FIG. 1). Although the front cover 4 is not provided with a lens step, a lens step may be provided according to a required light distribution pattern.
[0012]
Two reflectors are arranged in the concave portion 2 of the lamp body 3 in a state of being vertically arranged via a bracket 5. The bracket 5 is formed in a frame shape having large openings 6 and 7 arranged vertically, and a support piece 8 protrudes forward from a substantially central portion of the upper edge of the lower opening 7 in the left-right direction. In addition, a support plate 9 protrudes forward from the lower edge of the lower opening 7. Screw insertion holes 10, 10,... Are formed in portions located on both sides of the upper opening 6 (see FIG. 2). Two mounting bosses 11, 11 are provided at the lower end of the bracket 5 so as to be separated from each other in the left and right direction (only one is shown in FIG. 2).
[0013]
The main reflector 12 is fixed to substantially the upper half of the bracket 5. The main reflector 12 includes a reflection surface portion 12a having a reflection surface 13 on a front surface, an upper surface portion 12b, and a lower surface portion 12c. The front surface of the reflecting surface portion 12a, that is, the reflecting surface 13 has a shape like a strip that is cut in a long side in the left-right direction when the upper portion from the vicinity of the optical axis of the paraboloid of revolution is viewed from the front. Screw bosses 14, 14,... (Only one of them is shown in FIG. 2) protrude from the rear surface of the reflection surface portion 12a at positions near the left and right ends.
[0014]
The main reflector 12 is formed by screwing mounting screws 15, 15,... Inserted from behind into the screw insertion holes 10, 10,. 5 (see FIG. 2). A substantially rear half of the main reflector 12 is inserted through the opening 6 of the bracket 5 and protrudes to the rear of the bracket 5 (see FIG. 1).
[0015]
A light source bulb 16 is detachably supported by the main reflector 12. In this embodiment, a discharge bulb is used as the light source bulb 16 (see FIG. 1). However, this does not mean that the light source bulb supported by the main reflector 12 is limited to the discharge bulb, and is not limited to a predetermined one. Any type of valve may be used as long as it can obtain luminous intensity. The light-emitting portion (discharge region) 16 a of the light source bulb 16 is located near the focal point of the reflection surface 13, and most of the light emitted from the light source bulb 16 and reflected by the reflection surface 13 is located on the optical axis of the reflection surface 13. The lower side is illuminated. In addition, a shade 17 that covers the front and the lower part of the light source bulb 16 is arranged (see FIGS. 1 and 2), so that direct light is not emitted from the light source bulb 16 to the front.
[0016]
The main reflector 12 and the light source bulb 16 form the basic light distribution of the passing beam.
[0017]
A sub-reflector 18 is supported on the lower half of the bracket 5 so as to be rotatable in the left-right direction.
[0018]
The sub-reflector 18 comprises a paraboloidal reflecting surface 18a and upper and lower surfaces 18b and 18c. The upper surface portion 18b is formed in a shape slightly protruding forward from the center in the left-right direction of the upper edge of the reflection surface portion 18a, and the lower surface portion 18c is formed in a shape protruding forward from the entire lower edge of the reflection surface portion 18a. (See FIG. 2). A supported shaft 19 protrudes upward from a top end of the upper surface of the upper surface portion 18b, and the supported shaft 19 is rotatably supported by a front end of the support piece 8 of the bracket 5. The supported shaft 20 also projects downward from a position near the rear end of the lower surface of the lower surface portion 18c, that is, a position corresponding to the supported shaft 19 formed on the upper surface portion 18b. Has an engagement recess 20a having an engagement groove formed on the inner peripheral surface (see FIG. 1). The supported shaft 20 is rotatably supported at substantially the center of the support plate 9 of the bracket 5, and the lower end of the supported shaft 20 projects downward from the support plate 9. Thus, the sub-reflector 18 is supported between the support piece 8 of the bracket 5 and the support plate 9 so as to be rotatable in the left-right direction.
[0019]
A light source bulb 21 is supported at the center of the rear part of the reflection surface 18a of the sub-reflector 18. In this embodiment, a halogen bulb is used as the light source bulb 21 (see FIG. 1), but this does not mean that the light source bulb supported by the sub-reflector 18 is limited to the halogen bulb, Any type of valve may be used as long as it can obtain luminous intensity. The light emitting portion (filament) 21a (see FIG. 1) of the light source bulb 21 is located near the focal point of the reflection surface portion 18a, and the light emitted from the light source bulb 21 and reflected by the reflection surface portion 18a receives the optical axis of the reflection surface portion 18a. Are emitted as light beams substantially parallel to the light beam.
[0020]
A drive unit 23 for rotating the sub-reflector 18 is supported at the lower end of the bracket 5. The drive unit 23 includes a case body 24 in which a drive source such as a motor and a solenoid and necessary elements are housed, and the rotation shaft 25 protruding upward is rotated by the drive of the drive source. A plurality of engaging projections 25a, 25a,... Extending in the axial direction are provided on the outer peripheral surface of the rotating shaft 25 (see FIGS. 1 and 2). Attachment pieces 26, 26 (only one of them is shown in FIG. 2) protrude from both left and right sides of the case body 24. The attachment pieces 26, 26 have screw insertion holes 26a, 26a are formed.
[0021]
The drive unit 23 is configured such that the mounting screws 27, 27 (only one of which is shown in FIG. 2) inserted through the screw insertion holes 26a, 26a of the mounting pieces 26, 26 from below, the mounting boss 11 of the bracket 5, 11, thereby being attached to the lower end of the bracket 5. At the same time, the rotating shaft 25 of the driving unit 23 is fitted in the engaging recess 20a of the supported shaft 20 below the sub-reflector 18, and the engaging ridges 25a, 25a,. Are engaged with the engagement grooves of the engagement recesses 20a, whereby the rotary shaft 25 and the supported shaft 20 are key-coupled, that is, coupled with each other without slippage in the rotational direction.
[0022]
A drive source (not shown) of the drive unit 23 is driven by the control circuit unit 28. For example, the control circuit unit 28 sends a drive signal corresponding to a steering operation to the drive unit 23, and the rotating shaft 25 is rotated in a predetermined direction by a predetermined angle in accordance with the drive signal. Therefore, the sub-beam emitted by the light source bulb 21 and the sub-reflector 18 is directed to the left or right with respect to the main optical axis coinciding with the optical axis of the main reflector 12, whereby the traveling direction is previously irradiated, It is possible to ensure forward illumination when traveling on a curved road or at a turn at an intersection, thereby ensuring traffic safety. The control circuit unit 28 is placed outside the lamp body 3, and the control circuit unit 28 and the drive unit 23 are connected by cords 29, 29 and connectors 30, 30 (see FIG. 2).
[0023]
Then, the bracket 5 is fixed to the lamp body 3. In order to facilitate the aiming adjustment, the bracket 5 may be supported on the lamp body 3 so as to be tiltable.
[0024]
In the automotive headlamp, the upper surface 18b of the sub-reflector 18 located below the main reflector 12 has only a portion around the supported shaft 19, so that the lower surface 12c 'of the main reflector 12 is The light is reflected on the inner surface 18c 'of the lower surface 18c of the reflector 18.
[0025]
The lower reflector, that is, the inner surface 18c 'of the lower surface portion 18c of the sub-reflector 18, has the lower surface of the upper reflector, that is, the lower surface portion 12c of the main reflector 12 (this is referred to as the "lower surface of the main reflector") 12c. When the lower surface 12c 'is not subjected to any surface treatment, the appearance deteriorates. However, in the case of the automotive headlamp 1, the lower surface 12c' of the main reflector 12 is provided. Has been subjected to the surface treatment, it is not unsightly what is reflected on the inner surface 18c 'of the lower surface portion 18c of the sub-reflector 18. Therefore, the lower surface 12c' of the main reflector 12 is reflected on the lower surface inner surface 18c 'of the sub-reflector 18. Even if it does, it does not look bad.
[0026]
As the surface treatment of the lower surface 12c 'of the main reflector 12, a reflection surface treatment, a diffuse reflection surface treatment, painting, or the like can be considered.
[0027]
When the lower surface 12c 'of the main reflector 12 is subjected to the same reflective surface treatment as the inner surface 18c' of the sub-reflector, what is reflected on the inner surface 18c 'of the lower surface of the sub-reflector 18 is the same reflective surface as the surface of the inner surface 18c'. Therefore, the appearance is not impaired. As a method of treating the lower surface 12c 'of the main reflector 12 with a reflecting surface, for example, a method of forming a metal deposition film of aluminum or the like on the surface 12c' is available.
[0028]
Further, when the lower surface 12c 'of the main reflector 12 is subjected to the diffuse reflection surface treatment, the shape is blurred, so that the appearance is improved. Even if it is reflected by the lower surface of the sub-reflector, the reflected light is diffused, so that the reflected light is secondarily reflected by the inner surface 18c 'of the lower surface of the sub-reflector 18 and directed obliquely upward to drive the own vehicle or the oncoming vehicle. It is prevented that it becomes glare (illusory) light for the person. As a method of using the lower surface 12c 'of the main reflector 12 as a diffuse reflection surface, there are methods such as knurling for forming fine stripes arranged in parallel, graining and frosting for forming fine irregularities.
[0029]
3 and 4 show an example in which the lower surface 12c 'of the main reflector 12 is a diffuse reflection surface. A plurality of semi-cylindrical ridges 31, 31, ... extending in the front-rear direction are arranged on the lower surface 12c 'in the left-right direction, and the surfaces of the ridges 31, 31, ... are reflection surfaces. It is. As a result, the above-described effects can be obtained.
[0030]
As described above, the surface treatment of the lower surface 12c 'of the main reflector 12 improves the appearance, that is, the deterioration of the appearance due to the lower surface of the untreated main reflector being reflected on the lower surface inner surface 18c' of the sub-reflector 18. The same effect can be obtained by performing a diffuse reflection process on the inner surface 18c 'of the lower surface of the sub-reflector 18. That is, by making the lower surface inner surface 18c 'of the sub-reflector 18 a diffuse reflection surface, the shape of what is reflected on the surface 18c' is blurred. Even if the processing is not performed, deterioration of the appearance due to reflection of the surface 12c 'on the inner surface 18c' of the lower surface of the sub-reflector 18 is prevented. In this case, if the lower surface 12c 'of the main reflector 12 is surface-treated, the appearance is further improved. Further, the light impinging therefrom is diffusely reflected by the inner surface 18c 'of the lower surface of the sub-reflector 18 which has been subjected to the diffuse reflection processing, so that the light from the light source bulb 21 and the light reflected by the lower surface 12c' of the main reflector 12 are reflected. The light is reflected mainly by the inner surface 18c 'of the lower surface of the sub-reflector 18 and directed obliquely upward, thereby preventing glare (dazzling) light for the driver of the own vehicle and the oncoming vehicle. As described above, the inner surface 18 c ′ of the lower surface of the sub-reflector 18 may be formed as a diffuse reflection surface by knurling for forming fine stripes arranged in parallel, crimping or frosting for forming fine unevenness. There is a way.
[0031]
FIGS. 5 and 6 show an example in which the inner surface 18c 'of the lower surface portion 18c of the sub-reflector 18 is a diffuse reflection surface. On the inner surface 18c 'of the lower surface portion 18c of the sub-reflector 18, a large number of semi-cylindrical projections 32, 32, ... extending in the front-rear direction are arranged in the left-right direction, and the projections 32, 32, ... The upper surface is a reflection surface. As a result, the above-described effects can be obtained.
[0032]
FIG. 7 shows a vehicle lamp according to a second embodiment of the present invention.
[0033]
The vehicle headlamp according to the second embodiment differs from the vehicle headlamp 1 according to the first embodiment in the shape of the sub-reflector, and other parts are the same as those of the vehicle headlamp 1 according to the first embodiment. It is the same as each part. Therefore, the different parts will be described in detail, and the same parts as those in the first embodiment will be denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted. . In addition, the illustration of the lamp body and the front cover constituting the envelope of the automotive headlamp is omitted.
[0034]
The sub-reflector 40 includes a reflective surface portion 40a formed by cutting off the upper and lower sides of the paraboloid of revolution and having a horizontally long front shape, and an upper surface portion 40b and a lower surface portion 40c which cover both upper and lower surfaces of the reflective surface portion 40a. The lower surface portion 40c is formed with a protruding portion 40d that protrudes farther forward than the position of the front edge of the upper surface portion 40b. The supported shaft 41 protrudes upward at the center of the upper surface of the upper surface 40b in the left-right direction and near the front end, and the supported shaft 41 is turned to the distal end of the support piece 8 of the bracket 5. It is movably supported. The supported shaft 42 protrudes downward also from the center of the lower surface of the lower surface 40c in the left-right direction and closer to the front end, that is, from the position corresponding to the supported shaft 41 formed on the upper surface 40b. On the lower surface of the supported shaft 42, an engagement recess (not shown) having an engagement groove formed on the inner peripheral surface is formed. The supported shaft 42 is rotatably supported at substantially the center of the support plate 9 of the bracket 5, and the lower end of the supported shaft 42 projects downward from the support plate 9. Thus, the sub-reflector 40 is supported between the support piece 8 of the bracket 5 and the support plate 9 so as to be rotatable in the left-right direction.
[0035]
A light source bulb 43 is supported at the center of the rear part of the reflection surface 40a of the sub-reflector 40. In this embodiment, a halogen bulb is used as the light source bulb 43. However, this does not mean that the light source bulb supported by the sub-reflector 40 is limited to the halogen bulb, and that a predetermined luminous intensity can be obtained. Any type of valve may be used. An unillustrated light emitting portion (filament) of the light source bulb 43 is located near the focal point of the reflection surface portion 40a, and light emitted from the light source bulb 43 and reflected by the reflection surface portion 40a is substantially parallel to the optical axis of the reflection surface portion 40a. It is emitted as a light beam.
[0036]
Then, as in the first embodiment, the rotation shaft 25 of the drive unit 23 fixed to the lower end of the bracket 5 is fitted into an engagement recess (not shown) of the supported shaft 42 below the sub-reflector 40. It is the same as the sub-reflector 18 in the first embodiment in that the sub-reflector 40 is rotated left and right by the drive unit 23 by engaging and non-rotatable state.
[0037]
Since the above-mentioned sub-reflector 40 has a protruding portion 40d which is larger than the front edge of the upper surface portion 40b and protrudes forward from the lower surface portion 40c, when the sub-reflector 40 rotates left and right, the lower surface 12c 'of the main reflector 12 is There is a possibility that the light may be reflected on the inner surfaces 40c 'and 40d' of the lower surfaces 40c and 40d of the reflector 40, particularly 40d '. However, since the lower surface 12c 'of the main reflector 12 has been subjected to the surface treatment, what is reflected on the inner surfaces 40c' and 40d 'of the lower surfaces 40c and 40d of the sub-reflector 40 is not unsightly. Is reflected on the inner surfaces 40c 'and 40d' of the lower surface of the sub-reflector 40.
[0038]
As described above, the surface treatment of the lower surface 12c 'of the main reflector 12 improves the appearance, that is, the lower surface of the untreated main reflector is reflected on the lower surface inner surfaces 40c' and 40d 'of the sub reflector 40. Although the appearance can be prevented from being deteriorated, the first embodiment can also provide the same effect by performing diffuse reflection processing on the inner surfaces 40c 'and 40d' of the lower surface of the sub-reflector 40. The same as in.
[0039]
In the above-described embodiment, the present invention is applied to a headlight for an automobile. The present invention can be widely applied to vehicle lighting devices.
[0040]
In addition, the shapes and structures of the respective parts described in the above-described embodiments are merely examples of specific examples performed in practicing the present invention, and the technical and technical aspects of the present invention are not limited thereto. The scope should not be construed as limiting.
[0041]
【The invention's effect】
As is apparent from the above description, the vehicle lamp of the present invention is a vehicle lamp in which two reflectors each having a light source are arranged vertically and a lower reflector is rotatable. Wherein the lower surface of the upper reflector is subjected to a surface treatment.
[0042]
Therefore, in the vehicle lamp of the present invention, the lower surface of the upper reflector that has been subjected to the surface treatment is reflected on the inner surface of the lower portion of the lower reflector. Become.
[0043]
In the invention described in claim 2, since the surface treatment is a reflection surface treatment, there is no difference in the properties of the surface between the inner surface of the lower part of the lower reflector and the one reflected in the lower surface. Therefore, the appearance is good.
[0044]
According to the third aspect of the present invention, since the surface treatment is a diffuse reflection surface treatment, the appearance can be improved and the generation of glare light can be prevented.
[0045]
According to the invention described in claim 4, since the lower inner surface of the lower reflector is formed as a diffuse reflection surface, the appearance can be further improved and glare light can be prevented from being generated. .
[0046]
Another vehicle lighting device of the present invention is a vehicle lighting device in which two reflectors each having a light source are arranged vertically and a lower reflector is rotatable, and the lower reflector is The lower inner surface is a diffuse reflection surface.
[0047]
Therefore, in another vehicle lighting device of the present invention, the lower surface of the upper reflector does not appear in the lower inner surface of the lower reflector in an overt state, and thus the appearance is not impaired. Further, generation of glare light can be prevented.
[Brief description of the drawings]
FIG. 1 shows a first embodiment of a vehicular lamp according to the present invention together with FIGS. 2 to 6, and is a longitudinal sectional view.
FIG. 2 is an exploded perspective view of a main part.
FIG. 3 shows a modification of the main reflector together with FIG. 4, and this figure is a bottom view.
FIG. 4 is a front view.
FIG. 5 shows a modification of the sub-reflector together with FIG. 6, and FIG. 5 is a perspective view.
FIG. 6 is a front view.
FIG. 7 is an exploded perspective view showing a main part of a vehicle lamp according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Automotive headlamp (vehicle lamp), 12 ... Main reflector (upper reflector), 12c '... Lower surface, 16 ... Light source bulb (light source), 18 ... Sub reflector (lower reflector), 18c ... Lower surface Part (lower part), 18c '... inner surface, 40 ... sub-reflector, 40c ... lower surface part (lower part), 40s' ... inner surface, 40d ... lower part part (lower part), 40d' ... inner surface

Claims (5)

A vehicle lamp in which two reflectors each having a light source are arranged vertically, and the lower reflector is rotatable,
A vehicular lamp characterized in that a surface treatment is performed on a lower surface of an upper reflector. The vehicular lamp according to claim 1, wherein the surface treatment is a reflection surface treatment. The vehicular lamp according to claim 1, wherein the surface treatment is a diffuse reflection surface treatment. 4. The vehicular lamp according to claim 1, wherein the lower inner surface of the lower reflector is a diffuse reflection surface. A vehicle lamp in which two reflectors each having a light source are arranged vertically, and the lower reflector is rotatable,
A vehicular lamp characterized in that a lower inner surface of a lower reflector is a diffuse reflection surface.

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