JP2006260823A - Vehicular lighting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular lighting tool, compact and with a wide irradiation angle, which can be applied for a headlight such as a bending lamp. <P>SOLUTION: The bending lamp 10 is provided with: a light source bulb 12 equipped with a light source 12a irradiating light in a lamp room 1d formed of a lamp body 3 and a cover 2; a first and a second reflectors 14, 16 reflecting the light irradiated from the light source 12a; a shade 15 partly shielding the light reflected by the first reflector 14; and a projection lens 18 directly projecting the light-source light forward. The first reflector 14 has the light from the light source 12a incident into the projection lens through the shade 15 to irradiate it forward, and the second reflector 16 directly irradiates the light from the light source 12a sideways. A light axis of a light beam group L1 directly projected through the projection lens 18, a light axis of a light beam group L2 irradiated through the first reflector 14, and a light axis of a light beam group L3 irradiated through the second reflector 16 are different from each other. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp that can be used as a headlamp such as a bending lamp.

  In general, vehicles include headlamps such as headlamps and bending lamps that mainly illuminate the traveling direction of the vehicle, and turn signal lamps and stop lamps that indicate the presence of the vehicle and the driver's will to third parties outside the vehicle. A plurality of indicator lights are provided.

  For example, a bending lamp, which is one of headlamps, is a lamp that improves side visibility when the vehicle turns. Bending lamps generally employ many so-called step reflectors, in which a free reflection curved surface is formed on a reflection surface by a plurality of reflection surface elements. The light emitted from the light source bulb enters the step reflector and is irradiated with the light reflected by each reflecting surface element of the step reflector to illuminate the front, rear, side, etc. of the vehicle (see, for example, Patent Document 1). ).

  If a step reflector is used, the cover that covers the front of the lamp chamber does not need to be provided with optical lens elements such as diffusion and refraction, and light may pass therethrough. Accordingly, there is a design advantage that the appearance of the lamp as a whole is made transparent.

On the other hand, in the field of illuminating lamps, a projector-type lighting device may be used in recent years. The projector type is provided with a convex lens, provided with a shade for creating a light distribution pattern of a passing beam near the focal position of the convex lens, and magnified and projected with a convex lens of the light distribution pattern formed by this shade. When the projector type is used, the cut-off line can be clearly and freely formed, and glare can be suppressed even when a light source with a large amount of light is used. In addition, since the projector type can reduce the size of the entire headlamp, it is possible to easily meet various design requirements.
JP-A-10-162606

  In general, a headlamp such as a bending lamp can often be arranged only in a smaller installation space than an illumination lamp such as a headlamp due to design restrictions and the like. Therefore, when a projector type lighting device is used as a headlamp such as a bending lamp, it is necessary to further reduce the size of the small projector type lighting device.

  Further, since the projector-type illumination device emits light forward as substantially parallel light by a lens, the directivity of light rays is high, and the irradiation angle range in the vehicle width direction is narrow due to the structure. Therefore, in order to apply to a headlamp such as a bending lamp, some measure for expanding the irradiation angle range is required.

  An object of the present invention is to provide a vehicular lamp that is small and has a wide irradiation angle range and can be applied to a headlamp such as a bending lamp.

The present invention is achieved by the following configurations.
(1) In the lamp chamber formed by the lamp body and cover,
A light source bulb having a light source for emitting light;
A reflector for reflecting light emitted from the light source;
A projection lens that directly projects the light source light forward,
The reflector includes a first reflecting member that irradiates the projection lens with light from the light source and irradiates forward, and a second reflecting member that directly irradiates the light from the light source without entering the projection lens. Have
An optical axis of light directly projected through the projection lens, an optical axis of light irradiated through the first reflecting member, and an optical axis of light irradiated through the second reflecting member A vehicular lamp characterized by being different.
(2) a shielding plate that is provided in the vicinity of the rear focal point of the projection lens and shields part of the light reflected by the reflector;
The vehicular lamp according to (1), further comprising: a shielding member that is disposed on the light source bulb and partially shields light from the light source.
(3) The vehicular lamp according to (1) or (2), wherein the light source bulb is arranged so as to be substantially parallel to a vertical direction of the vehicle.
(4) The angle formed by the optical axis of the light directly projected through the projection lens with respect to the vehicle front-rear direction is determined by the optical axis of the light irradiated through the first reflecting member and the second reflecting member. The vehicular lamp according to any one of (1) to (3), wherein an optical axis of the light emitted is smaller than an angle formed with respect to the vehicle longitudinal direction.
(5) Any one of (1) to (5), wherein an optical axis of light directly projected through the projection lens forms an angle of 10 degrees to 20 degrees with respect to the vehicle longitudinal direction. The vehicle lamp according to Item.

  According to the vehicle lamp of the present invention, the optical axis of the light directly projected through the projection lens, the optical axis of the light irradiated through the first reflecting member, and the irradiation through the second reflecting member. The optical axes of the light beams are different, and light is irradiated over a wide range of angles. Accordingly, it is possible to provide a vehicular lamp that is highly visible both frontward, obliquely forward, and sideways. In addition, according to the present invention, since the light from the light source is directly projected through the projection lens, even in the projector type, the distance between the light source and the projection lens is shortened. It is possible to irradiate the area with intense spot-like light. Therefore, it is possible to provide a bright vehicular lamp although the overall length is short.

  Further, according to the vehicular lamp of the present invention, since the shielding plate and the shielding member are provided in the vicinity of the rear focal point of the projection lens, even when the light source light is irradiated directly forward without passing through the projection lens. Even when the first reflecting member is configured as a reflecting member having a substantially elliptical shape and is irradiated forward, the light is appropriately shielded by the shielding member or the light is appropriately shielded by the shielding plate. By making the light incident on the projection lens, the light emitted from the projection lens is irradiated below, for example, a certain cutoff line, and there is no possibility of causing glare or the like. Therefore, it is possible to provide an appropriate vehicular lamp that complies with the light distribution standard.

  According to the present invention, the light source bulb is arranged so as to be substantially parallel to the vehicle vertical direction. Therefore, it is possible to provide a vehicular lamp having a neat layout without providing a light source bulb mounting member on the side or rear of which there are many size restrictions and without projecting the end of the light source bulb.

In the vehicular lamp of the present invention, the angle formed by the optical axis of the light directly projected through the projection lens with respect to the vehicle longitudinal direction is such that the optical axis of the light irradiated through the first reflecting member is in the vehicle longitudinal direction. The angle to be opposed and the optical axis of the light irradiated through the second reflecting member are smaller than the angle to be made with respect to the vehicle longitudinal direction. As described above, since the three types of optical axes of light are respectively irradiated over different angular directions, it is possible to provide a vehicular lamp that is highly visible in front, obliquely forward, and sideways. The light emitted from the light source and directly projected through the projection lens is irradiated at an angle closest to the vehicle front-rear direction and irradiates a specific spot with a strong spot-like light. In this case, it is possible to irradiate light at an irradiation angle effective for improving forward visibility. Therefore, it is possible to provide a vehicular lamp that further improves forward visibility.
In addition, it is preferable that the optical axis of the light directly projected through the projection lens makes an angle of 10 degrees to 20 degrees with respect to the vehicle longitudinal direction.

  Hereinafter, an embodiment of a vehicular lamp according to the present invention will be described with reference to the accompanying drawings. In the present embodiment, a vending lamp will be described as an example of a vehicular lamp.

  1 is a horizontal sectional view showing a lamp unit attached to the right front side of the vehicle, FIG. 2 is an enlarged horizontal sectional view showing in detail only a bending lamp portion of the lamp unit in FIG. 1, and FIG. 2 is a cross-sectional view taken along line III-III in FIG. 2, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.

  As shown in FIG. 1, the lamp unit 1 of the present embodiment mainly includes a lamp body 3 and a light-transmitting cover 2 that covers an opening of the lamp body 3. The lamp body 3 and the cover 2 are partitioned by an extension 4 to form four lamp chambers 1a, 1b, 1c, and 1d. Etc. are arranged to constitute a vehicular lamp.

  In this embodiment, the lamp chamber 1a has a fog lamp unit 5, the lamp chamber 1b has a headlamp unit 6 that irradiates a traveling beam, the lamp chamber 1c has a headlamp unit that irradiates a low beam, and the lamp chamber 1d has a bending lamp. 10 are arranged respectively.

Hereinafter, the bending lamp 10 formed in the lamp chamber 1d will be described in detail.
The bending lamp 10 is a headlamp that is attached to the right front side of the vehicle and is lit when turning right according to a driver's operation to illuminate the right turn direction to ensure cornering visibility. As shown in FIG. 2, the bending lamp 10 includes a light source bulb 12, a first reflector 14 (first reflective member) and a second reflector 16 (first reflective member) provided on the rear side of the light source bulb 12, and A shade 15 provided on the left side of the light source bulb 12 and a projection lens 18 provided in front of the light source bulb 12 are provided.

  The light source bulb 12 is a halogen bulb such as H3, and emits light from a light source 12a constituted by a filament inside the bulb tube 12b as shown in FIG. The light source bulb 12 is inserted and fixed along a vehicle vertical direction into a through-hole 22 that opens to an extension 21 that extends from the lower end of the second reflector 16 toward the front side of the vehicle. Thereby, the light source bulb 12 is fixed so that the axial direction of the bulb tube 12b is substantially parallel to the vehicle vertical direction, and the light source 12a is arranged in the vicinity of the point P1 in the rear focal group of the projection lens 18. As shown in FIG. 2, the light source bulb 12 of this embodiment is attached so that the central axis of the filament corresponding to the light source 12a is parallel to the horizontal plane.

  Further, as shown in FIG. 3, a shielding member 12d for shielding a part of the light emitted from the light source 12a is provided on the bulb tube 12b of the light source bulb 12. The shielding member 12d is, for example, a light-shielding coating film that is formed so that the upper end is on a straight line passing through the light source 12a and one point P1 in the rear focal group of the projection lens 18 and substantially positioned near the point P1. Yes, a part of the light is shielded by the shielding member 12d and projected by the projection lens 18, thereby forming a projection image having a cut-off line ahead. The shape of the upper end of the shielding member 12d may have a shape corresponding to the shape of the cut-off line to be formed.

  As shown in FIG. 2, the first reflector 14 is a reflecting member attached so as to cover the left rear side from the left side surface of the light source bulb 12, and the second reflector 16 covers the right rear side from the rear side of the light source bulb 12. It is the reflection member attached so. In FIG. 2, the first reflector 14 and the second reflector 16 are integrally formed, but may be formed separately.

  First, the 1st reflector 14 and the optical member relevant to this 1st reflector 14 are demonstrated.

  As shown in FIGS. 2 and 4, the first reflector 14 includes, for example, a first reflecting surface 14 a having a free-form surface shape in which the vertical cross-sectional shape is elliptical and the horizontal cross-sectional shape is formed based on the elliptical shape. It is provided on the peripheral side. The first focal point of the first reflecting surface 14a is positioned substantially at the light source 12a, and the first reflecting surface 14a reflects the light emitted from the light source 12a and is provided on the front projection lens 18 side. Reflects toward the vicinity of P2. In the first reflector 14, the degree of diffusion of light formed by the light reflected by the first reflector 14 is determined according to the horizontal cross-sectional shape having a free cross-sectional shape.

  As shown in FIG. 4, the shade 15 is disposed between the first reflector 14 and the projection lens 18 and on the left side of the light source 12 a, and shields a part of the light emitted from the first reflector 14. It is. When light is partially blocked by the shade 15, an image having a cut-off line corresponding to the shape of the upper end surface 15a of the shade 15 is formed in the vicinity of the second focal point P2.

  The projection lens 18 is a convex lens having a convex surface on the front side of the vehicle and a flat surface on the rear side of the vehicle. The rotation center axis Lx of the projection lens 18 is fixed to the end of the first reflector 14 via the lens holder 19 so as to form an angle in the horizontal plane with respect to the vehicle longitudinal direction Vx. An angle formed by the rotation center axis Lx of the projection lens 18 with respect to the vehicle longitudinal direction Vx is, for example, 20 degrees.

  The projection lens 18 irradiates the front side of the vehicle with light reflected by the first reflector 14 and partially shielded by the shade 15. The image formed by the light reflected by the first reflector 14 and passing through the shade 15 is projected forward as an inverted image by 180 degrees by the projection lens 18.

Next, the second reflector 16 will be described.
As shown in FIGS. 2 and 3, for example, the second reflector 16 has a free-form surface shape in which the vertical cross-sectional shape is a parabolic shape and the horizontal cross-sectional shape is formed based on the parabolic shape. The surface 16a is provided on the inner peripheral surface side. The focal point of the second reflecting surface 16a is positioned substantially at the light source 12a, and the second reflecting surface 16a reflects the light emitted from the light source 12a and reflects it from the right front to the side. The irradiation range of the second reflecting surface 16a is defined by the horizontal cross-sectional shape having the free curved surface shape.

Next, the light distribution pattern formed by the light emitted from the bending lamp 10 of this embodiment will be described with reference to FIGS.
FIG. 5 is an optical path diagram of light emitted from the bending lamp 10 according to the present embodiment, and FIG. 6 is a diagram illustrating a light distribution pattern of light projected by the bending lamp 10.

  In the bending lamp 10 of the present embodiment, light from the light source 12a is roughly divided and irradiated to the outside of the vehicle through three types of optical paths.

  First, the first optical path is a pattern that is directly incident on the projection lens 18 from the light source 12a and projected forward. As indicated by the solid line arrow in FIG. 5, a part of the light emitted from the light source 12 a directly enters the projection lens 18 through the vicinity of one point P <b> 1 in the rear focal group of the projection lens 18. Irradiated forward as group L1. The irradiation direction of the light beam group L1 is determined by the positional relationship between the projection lens 18 and the light source 12a.

  In the present embodiment, since the light source 12a is disposed slightly to the right of the rotation center axis Vx of the projection lens 18, the light transmitted through the projection lens 18 is slightly left of the rotation center axis Vx of the projection lens 18. Projected towards. The angle that the optical axis of the light beam group L1 makes with the vehicle traveling direction in the horizontal plane is, for example, 10 degrees to 20 degrees. In the present embodiment, the optical axis is adjusted to 10 degrees, and as shown in FIG. 6, a light distribution pattern 30 in which light converges in a range of approximately 4 degrees to 16 degrees is formed. At the upper end of the light distribution pattern 30, a cut-off line is formed in which the bright and dark areas are cut by the shielding member 12d.

  Next, the second optical path is a pattern that is emitted from the light source 12 a, reflected by the first reflecting surface 14 a of the first reflector 14, and projected forward through the shade 15 and the projection lens 18. As shown by a rough broken line in FIG. 5, a part of the light emitted from the light source 12 a is irradiated toward the left rear and is reflected by the first reflecting surface 14 a of the first reflector 14. The light reflected by the first reflecting surface 14a travels to the shade 15 side, is partially shielded by the shade 15, and is collected near the second focal point P2. The rear focus group of the projection lens 18 is disposed in the vicinity of the second focus P2.

  Then, the light collected at the second focal point P2 of the projection lens 18, that is, the rear focal point of the projection lens 18, is incident on the projection lens 18 and irradiated forward as a light beam group L2 in a state of being converged to some extent. The angle formed by the optical axis of the light beam group L2 irradiated forward by the projection lens 18 with the vehicle traveling direction is larger than the angle formed by the optical axis of the light beam group L1 with the vehicle traveling direction in the horizontal plane, that is, the light beam group L1. It is set so as to irradiate a more lateral range. In the present embodiment, as shown in FIG. 6, a light distribution pattern 31 in which light is diffused to some extent is formed in a range of approximately 4 degrees to 45 degrees. The light distribution pattern 31 is irradiated so as to overlap the light distribution pattern 30 and is configured to irradiate a wide side area including the light distribution pattern 30.

  Next, the third optical path is a pattern that is emitted from the light source 12a, reflected by the second reflecting surface 16a of the second reflector 16, and irradiated as it is. As shown by a fine broken line in FIG. 5, a part of the light emitted from the light source 12a is irradiated backward, reflected by the second reflecting surface 16a, and irradiated forward. The angle formed by the optical axis of the light beam group L3 irradiated forward by the projection lens 18 with respect to the vehicle traveling direction is the angle formed by the optical axis of the light beam group L1 within the horizontal plane and the optical axis of the light beam group L2. It is set so as to irradiate a range larger than the angle formed with the vehicle traveling direction, that is, more lateral than the light ray group L2. In the present embodiment, as shown in FIG. 6, a light distribution pattern 32 in which light is diffused to some extent in a range of about 45 degrees to 80 degrees is formed. The light distribution pattern 32 is configured to be irradiated so as to partially overlap the light distribution pattern 31 and to irradiate a wider side area including the light distribution pattern 31.

  As described above, the bending lamp 10 according to this embodiment includes the light source bulb 12 including the light source 12a for emitting light in the lamp chamber 1d formed by the lamp body 3 and the cover 2, and the light emitted from the light source 12a. First and second reflectors 14 and 16 that reflect the reflected light, a shade 15 that partially shields the light reflected by the first reflector 14, and a projection lens 18 that directly projects the light source light forward. Yes. Here, the 1st reflector 14 injects into the projection lens the light from the light source 12a via the shade 15, and irradiates ahead, and the 2nd reflector 16 irradiates the light from the light source 12a directly to the side. Then, the optical axis of the light beam group L 1 projected directly through the projection lens 18, the optical axis of the light beam group L 2 irradiated through the first reflector 14, and the light beam group irradiated through the second reflector 16. The optical axes of L3 are different from each other.

  Thus, according to the bending lamp 10 of the present embodiment, the optical axis of the light beam group L1 projected directly through the projection lens 18 and the optical axis of the light beam group L2 irradiated through the first reflector 14 The optical axes of the light beam groups L3 irradiated through the second reflector 16 are different from each other, and light is irradiated over a wide angular range. Therefore, it is possible to provide the bending lamp 10 with high visibility in front, diagonally forward, and side.

  Specifically, in the bending lamp 10 of the present embodiment, the angle formed by the optical axis of the light beam group L1 directly projected through the projection lens 18 with respect to the vehicle front-rear direction is the light beam irradiated through the first reflector 14. The optical axis of the group L2 is smaller than the angle formed with respect to the vehicle longitudinal direction. The angle formed by the optical axis of the light beam group L2 irradiated through the first reflector 14 with respect to the vehicle front-rear direction is the angle formed by the light beam group L3 of light irradiated through the second reflector 16 with respect to the vehicle front-rear direction. Smaller than. In this way, since the three types of light groups L1 to L3 are respectively irradiated over different angular directions, it is possible to provide the bending lamp 10 with high visibility in the front, the diagonally forward, and the side.

  Further, in the bending lamp 10 of the present embodiment, the light group L1 is emitted from the light source 12a and directly projected through the projection lens 18, so that the distance between the light source 12a and the projection lens 18 is also a projector type. With a configuration in which the length is shortened, it is possible to irradiate a specific area with intense spot-like light. In the present embodiment, the light beam L1 is irradiated in a direction of 4 degrees to 16 degrees with respect to the vehicle traveling direction. In this direction, the vehicle is traveling in a medium speed range (for example, 20 to 40 km). In this case, the irradiation angle is effective for improving the visibility of the front bending lamp 10. Therefore, it is possible to provide the bending lamp 10 that can be easily seen by a third party ahead when the vehicle decelerates to some extent for turning and lights up the bending lamp 10.

  Further, in the bending lamp 10 of the present embodiment, the light source bulb 12 is arranged from the bottom to the top so as to be substantially parallel to the vehicle vertical direction. Therefore, it is possible to provide the bending lamp 10 having a neat layout without providing a light source bulb mounting member on the side or rear where the size is limited and without projecting the end of the light source bulb.

  In this embodiment, the central axis of the filament constituting the light source 12a of the light source bulb 12 is attached so as to be parallel to the horizontal plane. However, the present invention is not limited to this, and the central axis of the filament is aligned with the horizontal plane. You may attach so that a part angle may be made. FIG. 7 is an example of a light distribution pattern when the filament is attached so that the central axis of the filament forms a part of the horizontal plane. In FIG. 7, the light distribution pattern 30 </ b> A formed by the light beam group L <b> 1 is tilted and tilted downward from the vehicle front-rear direction toward the side. Thus, by configuring the inclined light distribution pattern 30A, the visibility of the road surface can be enhanced from the medium speed range to the low speed range.

  In the embodiment described above, the bending lamp attached to the front right side has been described as an example, but it may be applied to a bending lamp attached to another part. Further, the present invention is not limited to bending lamps, and may be applied to other headlamps such as stop lamps.

It is a horizontal sectional view which shows the lamp unit attached to the right front of a vehicle. FIG. 2 is an enlarged horizontal sectional view showing in detail only a bending lamp portion of the lamp unit in FIG. 1. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is an optical path diagram of light emitted from the bending lamp of this embodiment. It is a figure which shows the light distribution pattern of the light projected by a bending lamp. It is a figure which shows another light distribution pattern of the light projected by a bending lamp.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lamp unit 2 Cover 3 Lamp body 4 Extension 1a, 1b, 1c, 1d Lamp chamber 10 Bending lamp 12 Light source bulb 14 1st reflector (1st reflection member)
15 Shade 16 Second reflector 18 Projection lens

Claims (5)

In the lamp chamber formed by the lamp body and cover,
A light source bulb having a light source for emitting light;
A reflector for reflecting light emitted from the light source;
A projection lens that directly projects the light source light forward,
The reflector includes a first reflecting member that irradiates the projection lens with light from the light source and irradiates forward, and a second reflecting member that directly irradiates the light from the light source without entering the projection lens. Have
An optical axis of light directly projected through the projection lens, an optical axis of light irradiated through the first reflecting member, and an optical axis of light irradiated through the second reflecting member A vehicular lamp characterized by being different. A shielding plate that is provided in the vicinity of the rear focal point of the projection lens and shields part of the light reflected by the reflector;
The vehicular lamp according to claim 1, further comprising: a shielding member that is disposed on the light source bulb and partially shields light from the light source.   The vehicular lamp according to claim 1, wherein the light source bulb is disposed so as to be substantially parallel to a vehicle vertical direction.   The angle formed by the optical axis of the light directly projected through the projection lens with respect to the vehicle longitudinal direction is irradiated through the optical axis of the light irradiated through the first reflecting member and the second reflecting member. The vehicular lamp according to any one of claims 1 to 3, wherein an optical axis of light is smaller than an angle formed with respect to a vehicle longitudinal direction.   6. The vehicle according to claim 1, wherein an optical axis of light directly projected through the projection lens forms an angle of 10 degrees to 20 degrees with respect to a vehicle longitudinal direction. Lamps.

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