JP2006260824A - 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 reflector 14 reflecting the light irradiated from the light source 12a; and a projection lens 18 directly projecting the light-source light forward. The reflector 14 irradiates the light from the light source 12a directly outside a vehicle. A light axis of a light beam group L1 directly projected through the projection lens 18, and a light axis of a light beam group L2 irradiated through the reflector 14 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 various signs 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 the light emitted from the light source and irradiating the light to the outside;
A projection lens that directly projects the light source light forward,
The vehicular lamp, wherein the optical axis of light projected through the projection lens and the optical axis of light irradiated through the reflector are in different directions.
(2) The vehicle lamp according to (1), wherein the light source bulb is arranged along a vehicle width direction.
(3) The optical axis of the light projected through the projection lens makes an angle of 10 degrees to 20 degrees with respect to the longitudinal direction of the vehicle. Light fixture.
(4) Any one of (1) to (3), wherein the light irradiated through the reflector is irradiated so as to be diffused light diffused by 4 degrees to 80 degrees with respect to the vehicle longitudinal direction. The vehicle lamp according to one 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, the projector type can be specified with a configuration in which 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.

  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. Thus, since the two types of optical axes of the 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. In addition, 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 a specific spot is irradiated with a strong spot-like light. When traveling, it is possible to irradiate light at an irradiation angle effective for improving the visibility of the vehicular lamp from the front. Therefore, it is possible to provide a vehicular lamp that has high visibility when traveling.

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.
Moreover, it is preferable to irradiate the light irradiated via a reflector so that it may become the diffused light diffused 4 to 80 degree | times with respect to the vehicle front-back 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.

  FIG. 1 is a horizontal sectional view showing a lamp unit attached to the right front side of the vehicle, and FIG. 2 is an enlarged horizontal sectional view showing in detail only a bending lamp portion of the lamp unit 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 7 that irradiates a low beam, and the lamp chamber 1d has a bending. Each of the lamps 10 is arranged.

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 ensure visibility at corner cornering. As shown in FIG. 2, the bending lamp 10 includes a light source bulb 12, a reflector 14 provided so as to cover the light source bulb 12, and a projection lens 18 provided in front of the light source bulb 12.

  The light source bulb 12 is a halogen bulb such as H7, HB4, H11 or the like, or a discharge bulb such as D2R. FIG. 3 illustrates a discharge bulb that emits light from the light source 12a constituted by the discharge portion inside the bulb tube 12b. ing. The light source bulb 12 is inserted into a through hole 22 opened in the vehicle width direction of the reflector 14 from the side surface of the reflector 14 along the vehicle width direction and fixed. As a result, the light source bulb 12 is fixed so that the axial direction of the bulb 12b is substantially parallel to the vehicle width direction, and the light source 12a is arranged in the vicinity of the point P in the rear focal group of the projection lens 18.

  As shown in FIG. 2, the reflector 14 has, for example, a reflecting surface 14a having a free-form surface shape in which the vertical cross-sectional shape is a substantially parabolic shape and the horizontal cross-sectional shape is configured to diffuse light. In preparation. The focal point of the reflecting surface 14a is positioned substantially at the light source 12a, and the reflecting surface 14a reflects the light emitted from the light source 12a and is reflected obliquely forward to the left. The light emitted from the reflector 14 is appropriately diffused and irradiated in the horizontal direction according to the free cross-sectional shape of the reflecting surface 14a.

  The projection lens 18 is a convex lens having an aspherical convex surface on the front side of the vehicle and a flat surface on the rear side of the vehicle. The center axis Lx of the projection lens 18 is parallel to the vehicle front-rear direction Vx and is shifted to the vehicle outer side (left side in FIG. 2) from the straight line passing through the light source 12a and parallel to the vehicle front-rear direction Vx. It is being fixed to the reflector 14 via.

  The projection lens 18 is a lens that directly projects the light emitted from the light source 12 a of the light source bulb 12 provided inside the reflector 14. As shown in FIG. 2, the projection lens 18 is positioned so that the rear focal point P of the projection lens 18 is disposed in the vicinity of the light source 12 a of the light source bulb 12. The projection lens 18 irradiates the light emitted from the light source bulb 12a and projected by the projection lens 18 through the vicinity of the rear focal point P of the projection lens 18 as substantially parallel light. That is, the light source 12a and the projection lens 18 of this embodiment form a projector type lamp that does not use a reflecting mirror.

Next, an optical path and a light distribution pattern of light emitted from the bending lamp 10 of the present embodiment will be described with reference to FIG.
FIG. 3 is an optical path diagram of light emitted from the bending lamp 10 of the present embodiment, and FIG. 4 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 two 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 shown by the solid line arrow in FIG. 3, a part of the light emitted from the light source 12a passes through the vicinity of the rear focal point P of the projection lens 18 and directly enters the projection lens 18, and forwards as a light beam group L1. Irradiated.

  In the present embodiment, the light source 12a is disposed slightly to the left of the lens center axis Lx of the projection lens 18, and light transmitted through the projection lens 18 is slightly to the right of the lens center axis Lx of the projection lens 18. Projected toward. 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 this embodiment, the optical axis is adjusted to 10 degrees, and as shown in FIG. 4, the light distribution pattern 30 having a high luminous intensity in which light converges in a range of approximately 4 degrees to 16 degrees is formed.

  Next, the second optical path is a pattern that is emitted from the light source 12a, reflected by the reflecting surface 14a of the reflector 14, and projected forward. As indicated by a broken line in FIG. 3, a part of the light emitted from the light source 12 a is irradiated toward the rear side and reflected by the reflecting surface 14 a of the reflector 14. The light reflected by the reflecting surface 14a is irradiated as a light beam group L2 in the diagonally forward left direction of the vehicle. 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. 4, a light distribution pattern 31 in which light is diffused to some extent in a range of approximately 4 degrees to 80 degrees is formed. 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.

  In summary, as shown in FIG. 4, in the bending lamp 10 of the present embodiment, light having a high luminous intensity is irradiated by the light distribution pattern 30 in a range of approximately 4 degrees to 16 degrees, and the light distribution pattern 31 is approximately 4 degrees to approximately 4 degrees. Light is irradiated in the range of 80 degrees. The light distribution pattern 30 is an irradiation angle effective for enhancing forward visibility by the bending lamp 10 when the vehicle is traveling in a medium speed range (for example, 20 to 40 km). Therefore, further forward visibility is ensured when the vehicle decelerates to some extent for turning and turns on the bending lamp 10. On the other hand, the light distribution pattern 31 is an irradiation angle effective for improving the visibility of the bending lamp 10 when the vehicle is traveling at a low speed (for example, 20 km or less). Therefore, even when the vehicle is sufficiently slow, side visibility is improved when the bending lamp 10 is turned on. Thus, it can be said that the bending lamp 10 of this embodiment is a lamp with high visibility from the low speed range to the medium speed range where the bending lamp is easily used.

  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. And a projection lens 18 that projects the light source light directly forward. Here, the reflector 14 irradiates the light from the light source 12a directly outside the vehicle. Then, 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 reflector 14 are different from each other.

  As described above, 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 reflector 14 are each. It is different and emits light over a wide range of angles. Therefore, it is possible to provide the bending lamp 10 with high visibility in front, diagonally forward, and side.

  In the bending lamp 10 of the present embodiment, the angle formed by the optical axis of the light beam L1 directly projected through the projection lens 18 with respect to the vehicle front-rear direction is the optical axis of the light beam L2 irradiated through the reflector 14. Is smaller than the angle the vehicle makes with respect to the vehicle longitudinal direction. In this way, since the two types of light groups L1 and L2 are respectively irradiated over different angular directions, it is possible to provide the bending lamp 10 with high visibility in front, obliquely forward, and 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 bending lamp 10 from the front. Therefore, it is possible to provide the bending lamp 10 with improved forward visibility 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 inserted from the side so as to be substantially parallel to the vehicle width direction. Therefore, it is possible to provide the bending lamp 10 with a neat layout without providing a light source bulb mounting member behind the size-restricted portion and without projecting the end of the light source bulb 12 or the like.

  Further, although the bending lamp 10 of the present embodiment is a projector type that projects forward through the projection lens 18, the light from the light source 12 a is directly incident on the projection lens 18. Therefore, a reflector for making light incident on the projection lens 18 is unnecessary, and projector-type light projection can be performed with a compact configuration.

  In the above description, the light distribution pattern 31 is irradiated over a range of approximately 4 ° to 80 °. However, the present invention is not limited to this, and the light distribution pattern 31 is appropriately irradiated so as to cover the light distribution pattern 30 and has a wide range. You may comprise so that light may spread through.

  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 cornering and fog 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. It is an optical path figure of the light radiate | 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.

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 Reflector 18 Projection lens

Claims (4)

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 the light emitted from the light source and irradiating the light to the outside;
A projection lens that directly projects the light source light forward,
The vehicular lamp, wherein the optical axis of light projected through the projection lens and the optical axis of light irradiated through the reflector are in different directions.   The vehicular lamp according to claim 1, wherein the light source bulb is disposed along a vehicle width direction.   3. The vehicular lamp according to claim 1, wherein an optical axis of light projected through the projection lens forms an angle of 10 degrees to 20 degrees with respect to a vehicle longitudinal direction.   The light irradiated through the reflector is irradiated so as to be diffused light that is diffused by 4 degrees to 80 degrees with respect to the vehicle front-rear direction. Vehicle lamp.

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