1. Field of the Invention
The present invention relates to a vehicle lamp mounted to a vehicle such as an automobile.
2. Description of the Related Art
Japanese Published Unexamined Patent Appl. No. 2007-250290 discloses a vehicle lamp formed by using a long solid light guide. A long light is radiated from the light guide when the light guide is irradiated by a light source disposed to an end portion in a longer-length direction of the light guide. The vehicle lamp can be used as a direction indicator lamp mounted into a door mirror. Indeed, the direction indicator lamp has been frequently used because legal requirements are satisfied by the emitted long light and the direction indicator lamp is excellent in design properties.
In order to improve design properties of the direction indicator lamp with the light guide, a plurality of light sources are disposed to an end portion of the light guide so that the direction indicator lamp (the light guide) emits a plurality of long lights.
However, the conventional direction indicator lamp needs more components and configurations are complicated because the plurality of light sources are mounted. A large number of components need to be installed into a small space, with a resultant exacting installation and increased cost. The present invention intends to solve the problems.
In view of the circumstances discussed above, the present invention has been made in order to solve the problems, and a first exemplary aspect of the present invention provides a vehicle lamp using a long solid light guide, wherein the light guide forms a long light radiation by irradiation from a light source provided at an end portion in a longer-length direction of the light guide, and a light radiation suppressing portion is provided on a light radiating surface of the light guide.
According to the first exemplary aspect, the vehicle lamp is excellent in visibility and design properties because of the light radiation appearing as if a plurality of lights are divided when the light guide is irradiated by one light source.
A second exemplary aspect of the present invention provides the vehicle lamp according to the first exemplary aspect, wherein the light radiation suppressing portion is a vapor-deposited portion formed on the light radiating surface of the light guide.
According to the second exemplary aspect, the light radiation suppressing portion is excellent in durability.
A third exemplary aspect of the present invention provides the vehicle lamp according to the first or second exemplary aspect, wherein the light radiation suppressing portion is provided on a projection formed on the light guide.
A fourth exemplary aspect of the present invention provides the vehicle lamp according to the first or second exemplary aspect, wherein the light radiation suppressing portion is provided on a recess formed on the light guide.
A fifth exemplary aspect of the present invention provides the vehicle lamp according to the first exemplary aspect, wherein the light radiation suppressing portion is a vapor-deposited portion formed in an interior of the light guide.
A sixth exemplary aspect of the present invention provides the vehicle lamp according to the first exemplary aspect, wherein an outer lens is provided in the light radiating direction of the light guide, and the light radiation suppressing portion is provided on the outer lens.
According to the third to sixth exemplary aspects, the light radiation suppressing portion is easy to form and a light shading is clear at a lower illuminant portion where the light radiation is reduced in suppression.
A seventh exemplary aspect of the present invention provides the vehicle lamp according to any one of the first to sixth exemplary aspects, wherein the light radiation suppressing portion is positioned at an intermediate portion in a shorter-length direction of the light guide and formed in the longer-length direction.
According to the seventh exemplary aspect, a design property is achieved as if the light is emitted from two light guides in appearance when one light guide is irradiated by one light source.
A eighth exemplary aspect of the present invention provides the vehicle lamp according to any one of the first to seventh exemplary aspects, wherein the light radiation suppressing portion is formed of a metal film.
According to the eighth exemplary aspect, the light radiation suppressing portion is further improved in durability.
A ninth exemplary aspect of the present invention provides the vehicle lamp according to any of the first to eighth exemplary aspects, which is a direction indicator lamp installed into a door mirror.
According to the ninth exemplary aspect, the direction indicator lamp is excellent in visibility and design properties.
A tenth exemplary aspect of the present invention provides the vehicle lamp according to the ninth exemplary aspect, wherein the light radiation suppressing portion is formed by a body of the door mirror.
According to the tenth exemplary aspect, the door mirror body doubles as the light radiation suppressing portion, achieving a simplified structure.
Embodiments of the present invention will be discussed with reference to the drawings.
In
The door mirror 1 will be mounted bilaterally and symmetrically to both left and right door bodies of the vehicle. However, the door mirror 1, which is attached to the left side of the vehicle as illustrated in
The turn lamp 2 is an assembly component to be installed into the door mirror 1 at the lower portion of the rearward bulging portion of the body 1a that forms the rear side (the back surface side) of the mirror.
The turn lamp 2 includes a base housing 3 and an inner housing 4; and an outer lens 5. The base housing 3 and the inner housing 4 are housed inside (mirror side) of the body 1a. The outer lens 5 covers a rear portion of the inner housing 4 and is exposed outside together with an outer peripheral surface of the body 1a.
The base housing 3, which is integrally molded from a non-translucent resin material, is formed to be curved and long in a right and left direction as illustrated in
A connecting portion 3c is connected to an external power supply. An attaching piece 3d is for integration with the body 1a of the door mirror 1.
The inner housing 4, which is made of a translucent resin material, is formed to be long in the right and left direction and has a left end portion curved forward to be arched similar to the base housing 3, as illustrated in
The inner member 7 includes a pair of upper and lower flange pieces 7a and 7b; and an integrating piece 7c connected between the flange pieces 7a and 7b, as illustrated in
A light shielding means may be provided to the inner member 7. The light shielding means may be applied overall with graining or a reflective film, for example, or made of a non-transparent or preferably a non-translucent resin material. With the light shielding means provided, the light source unit 8, which is installed to a front side of the inner member 7, cannot be observed visually from the outer lens 5 side. Thus, design properties can be improved, and light leakage from the light source unit 8 can be prevented.
The light guide member 6 is formed to have a curved shape using a transparent member (i.e., translucent resin material; for example, acrylic resin, polycarbonate resin, and the like). The light guide portion 6a, which is formed to be columnar, faces rearward. A semispherical light entering portion 6b is formed at a right end portion of the light guide portion 6a. An inner lens portion 6c is formed toward a left end portion of the light guide portion 6a. The inner lens portion 6c is flat, curved forward to be arched, and faces leftward. The light guide member 6 is installed into the inner member 7 from the rear. The light guide portion 6a is fit and held in the concave groove shape of the integrating piece 7c. Through the hollow portion 7d, the inner lens portion 6c is exposed forward and directly opposed to the base housing 3.
The light guide portion 6a of the light guide member 6 is formed such that a light shielding means is provided to a front surface 6d corresponding to a curve inner side portion of the light guide portion 6a to prevent light leakage. The light shielding means is provided such that the front surface 6d is applied with graining to have a non-smooth surface to shielding light. Further, a diffuse reflection means is provided to the inner lens portion 6c of the light guide member 6 to diffusely reflect light entering a front surface 6e. The diffuse reflection means diffusely reflects the light by a plurality of concave and convex surfaces formed to the front surface 6e. The light guide portion 6a is thus configured such that the light leakage through the front surface 6d is prevented and a rear surface 6f corresponds to a light radiating surface. The inner lens portion 6c is thus configured such that the diffusely reflected light is radiated leftward from the rear.
A projection 6g is formed on the rear surface 6f, positioned at an intermediate portion in an upper and lower direction (intermediate portion in a shorter-length direction of the light guide portion 6a), and has a predetermined width in the upper and lower direction. The projection 6g projects rearward and extends overall in a right and left direction of the rear surface 6f corresponding the light radiating surface of the light guide portion 6a. A light radiation suppressing portion 6h is provided to a projecting end surface (rear end surface) of the projection 6g. The light radiation suppressing portion 6h of the present embodiment is a vapor-deposited portion by vapor deposition. By evaporating a metal (aluminum, for example), a film of the metal is deposited over the projecting end surface of the projection 6g to form the light radiation suppressing portion 6h.
The light radiation suppressing portion 6h, which is the vapor-deposited portion, is excellent in durability. When the light radiation suppressing portion 6h is formed by vapor deposition, a portion other than the vapor-deposited portion of the light guide portion 6a needs to be masked such that only the portion to be vapor-deposited is vapor-deposited. In the present embodiment, the light guide portion 6a includes the projection 6g, the projecting end surface of which is vapor-deposited, thereby accomplishing a resulting easy and reliable masking without misalignment. In short, the light radiation suppressing portion 6h is easy to form and excellent in durability.
A radiation of light entering from the light entering portion 6b is suppressed in the light radiation suppressing portion 6h provided on the rear surface. A lower illuminant portion is thus formed in the intermediate portion in the upper and lower direction when the light is radiated from the rear surface 6f of the light guide portion 6a. This achieves a design property as if two lights are radiated long in the right and left direction in appearance. Further, the light is radiated from a stepped surface 6i of the projection 6g because the light radiation suppressing portion 6h is only on the projecting end surface of the projection 6g. Thus, a shading of the light adjacent to the light radiation suppressing portion 6h is intensified, which achieves a design property as if the light is emitted from two light guides in appearance.
The light source unit 8 is incorporated between the base housing 3 and the inner housing 4. In the present embodiment, the first emitting diode 9, a second emitting diode 10, and a third light emitting diode 11 are properly connected and integrated to a bus bar 12 for light sources of the turn lamp 2. The bus bar 12 of the light source unit 8 is formed to be curved. A substrate 13 is provided to a curved inner surface of the bus bar 12, the curved inner surface corresponding to an anterior surface of the bus bar 12. Properly wired and mounted to the substrate 13 are the first to third light emitting diodes 9 to 11 and other necessary electronic components. The light source unit 8 is held by the inner housing 4 (inner member 7). The inner housing 4 and the light source unit 8 are incorporated as a unit forming an inner assembly. The inner assembly is incorporated between the base housing 3 and the outer lens portion 5. The light source unit 8 includes an intermediate member 14 integrated with the substrate 13. A front end edge portion of the intermediate member 14 is sandwiched between contacting portions of the base housing 3 and the outer lens 5 so as to be integrated all together. The inner housing 4 and the light source unit 8 are thus held without backlash by the base housing 3 and the outer lens portion 5. In addition, terminals 14a penetrate through the intermediate member 14 in the upper and lower direction to be placed into the connecting portion 3c of the base housing 3. The terminals 14a connect the substrate 13 to an external power supply.
All of the light emitting diodes 9, 10, and 11 are general-purpose light emitting diodes. The first light emitting diode 9, which is supported by the support piece 7e of the inner member 7, is positioned at an end (right end) in a longer-length direction of the light guide member 6, corresponding to an end portion (right end portion) of the light entering portion 6b, to emit light to the light entering portion 6b. The second and third light emitting diodes 10 and 11 are positioned in front of the inner lens portion 6c of the light guide member 6, in which the inner lens portion 6c is exposed toward the base housing 3 through the hollow portion 7d, to emit light to the inner lens portion 6c diagonally backward left and leftward. The light guide member 6 is thus configured such that a turn on of the first light emitting diode 9, which is disposed at the right end of the light entering portion 6b forms a long light extending from the light entering portion 6b to the inner lens portion 6c through the light guide portion 6a with the lower illuminant portion at the intermediate portion by the light radiation suppressing portion 6h, and the light is radiated through the light guide member 6 rearward as if the light is divided up and down in appearance. The light guide member 6 is also configured such that a turn on of the second and third light emitting diodes 10 and 11 forms a backward and leftward light radiation diffusely reflected by the inner lens portion 6c.
The emitted light from the first light emitting diode 9 is guided to the light guide portion 6a and the inner lens portion 6c in a scattered manner because of the semispherical shape of the light entering portion 6b of the light guide member 6. An intensity of the emitted light is prevented from being reduced and the light radiation is excellent in design properties. Further, in the present embodiment, the second and third light emitting diodes 10 and 11 are provided at the left end portion, corresponding to an outer portion in the right and left direction of the vehicle body. The light entering a region of the inner lens portion 6c is radiated in the diffused manner through the inner lens portion 6c to the outside. The light radiation thus securely meets legally required illuminance for the turn lamp 2.
The outer lens 5 is arranged to cover the rear of the inner housing 4. Outer peripheral edges of the base housing 3 and the outer lens 5 are abutted and integrated with each other to form the turn lamp 2. The outer lens 5 is integrally formed by a translucent resin material. A light source opposed portion 5a is opposed to the portion at which the first light emitting diode 9 is arranged, the first light emitting diode 9 being supported by the support piece 7e of the inner member 7 of the inner housing 4. The light source opposed portion 5a is arranged adjacent to the first light emitting diode 9 through a stepped portion 5b of the outer lens 5. A light shielding means is provided to the light source opposed portion 5a, and the light guide member 6 is efficiently irradiated by the emitted light from the first light emitting diode 9 because the emitted light from the first light emitting diode 9 is prevented from being radiated (leaking) outside through the light source opposed portion 5a.
In the present embodiment, the light source opposed portion 5a is applied with graining to form the light shielding mean. However, another light shielding means can be applicable by adhesion of a non-translucent seal, or formation of a non-translucent film such as a reflective film.
With the above configurations, the emitted light from the first light emitting diode 9 is prevented from being attenuated at the left end of the light guide portion 6a and uniformly radiated throughout the right and left direction of the light guide portion 6a. Visibility is improved, and the light radiation is excellent in design properties by the light radiation suppressing portion 6h. Further, the light source opposed portion 5a is installed to be covered by the body 1a of the door mirror 1. The light radiation is thus further prevented from leaking outside through the light source opposed portion 5a.
In the above-discussed present embodiment, the turn lamp 2, which is installed into the door mirror 1, is configured such that the emitted light from the first light emitting diode 9 enters the light guide portion 6a of the light guide member 6; the emitted light from the second and third light emitting diodes 10 and 11 enters the inner lens portion 6c; the long light is radiated from the light guide portion 6a rearward to improve design properties; and the light is radiated from the inner lens 6c outward in the right and left direction to satisfy legal requirements. In this case, the light radiation long in the right and left direction appears as if the light is divided up and down when the emitted light from the first light emitting diode 9 enters the light guide portion 6a through the light entering portion 6b because the light guide portion 6a includes the light radiation suppressing portion 6h long in the right and left direction at the intermediate portion in the upper and lower direction. The turn lamp 2 is thus provided to be excellent in visibility and design properties without increasing components by irradiating only the one light guide member 6 (light guide portion 6a) with the one first light emitting diode 9 as if a plurality of long lights are radiated with a plurality of light guides being mounted in appearance.
Further, the design property is achieved as if the light from the light guide portion 6a appears divided because of the light radiation suppressing portion 6h provided to the light guide portion 6a. In this case, the light radiation suppressing portion 6h is excellent in durability and formed without increasing components because the rear surface of the light guide portion 6a is vapor-deposited to form the light radiation suppressing portion 6h.
Further, the light radiation suppressing portion 6h is provide to the projecting end surface of the projection 6g formed and integrated with the light guide portion 6a. The light radiation suppressing portion 6h is easy to form. The light radiation from the one light guide portion 6a appears as if two long lights are radiated because of the clear light shading.
Further, the light radiation suppressing portion 6h is formed by a vapor-deposited metal film. The light radiation suppressing portion 6h is thus further improved in durability.
Of course, the present invention shall not be limited to the above-discussed embodiment. A material (target) of a portion to be vapor-deposited is not limited to a metal in order to form a light radiation suppressing portion by the vapor-deposited portion. Any material will do as long as it can suppress a light radiation, such as a non-translucent resin material. However, aluminum, stainless steel, or the like is also applicable if a material of a vapor-deposited portion is a metal. Further, a impression of a light radiation varies with a light radiation suppressing portion being appropriately arranged to be orthogonal to a longer-length direction or wavy instead of being long in a longer-length direction.
Second and third embodiments are also feasible as illustrated in
The light guide 16 of the third embodiment as illustrated in
A turn lamp 18 of a fourth embodiment uses a light guide 17 with a non-columnar shape as illustrated in
A light guide 20 of a fifth embodiment is columnar as illustrated in
A turn lamp 21 of a sixth embodiment uses a light guide 22 with a non-columnar shape as illustrated in
Similar to the sixth embodiment, a turn lamp 24 of a seventh embodiment is configured such that an outer lens 26 is positioned in a light radiating direction of a light radiating surface 25a of a light guide 25 with a non-columnar shape, and a recess 25b is formed at an intermediate portion in an upper and lower direction of the light radiating surface 25a, as illustrated in
However, the light guides 22 and 25 may not necessarily include the recesses 22b and 25b in the sixth and seventh embodiments. The light radiating surfaces 22a and 25a may overall be attached closely to the outer lenses 23 or 26, respectively. Alternatively, a predetermined interspace may be formed between the outer lens 23 and the light guide 22, the outer lens 24 and the light guide 25.
A door mirror 27 of an eighth embodiment as illustrated in
The present invention belongs to the technical field of a vehicle lamp provided in a vehicle such as an automobile. With the configurations of the present invention, the vehicle lamp is provided excellent in visibility and design properties without increasing components. Further, there is industrial applicability in that the structure can be simplified such that a door mirror body can double as a light radiation suppressing portion.
Number | Date | Country | Kind |
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2008-281142 | Oct 2008 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/JP2009/005433 | 10/19/2009 | WO | 00 | 6/20/2011 |
Publishing Document | Publishing Date | Country | Kind |
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WO2010/050137 | 5/6/2010 | WO | A |
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