JP6774470B2 - Vehicle headlights - Google Patents

Description

The present invention relates to a vehicle lamp, and more particularly to a vehicle lamp including a light source and a lens body arranged in front of the light source.

Conventionally, a vehicle lamp having a light source and a lens body arranged in front of the light source has been proposed (see, for example, Patent Document 1).

FIG. 103 is a side view of the vehicle lamp 200 described in Patent Document 1.

The vehicle lamp 200 described in Patent Document 1 is a vehicle lamp that forms a low beam light distribution pattern including a cut-off line at the upper end edge, and as shown in FIG. 103, the front surface is convex and the rear surface is flat. Projection lens 210 (planar convex lens), a light-shielding member 220 arranged at the rear focal position of the projection lens 210, and a light source 23 arranged near the rear of the light-shielding member 220.
It is configured as a vehicle lamp equipped with 0 (light emitting diode) and the like.

Japanese Patent No. 4037337

However, in the vehicle lamp 200 having the above configuration, some of the light from the light source 230 (see, for example, Ray _{OUT in} FIG. 103) does not enter the projection lens 210 and is used for forming the low beam light distribution pattern. Therefore, there is a problem that the light utilization efficiency is lowered.

The present invention has been made in view of such circumstances, and includes a light source and a lens body arranged in front of the light source, and a light distribution pattern including a cut-off line at the upper end edge (for example, a light distribution pattern for a low beam). The purpose is to suppress a decrease in light utilization efficiency in vehicle lamps configured to form).

In order to achieve the above object, one aspect of the present invention is a light source and a lens body arranged in front of the light source, including a rear end portion and a front end portion, and the light source incident on the inside of the lens body. A vehicle lamp provided with a lens body configured to form a first light distribution pattern including a cut-off line at the upper end edge by emitting light from the front end portion and irradiating the front end portion. The present invention is characterized in that the light source includes a reflecting surface that reflects light other than the light directly incident on the inside of the lens body and causes the light to be incident on the inside of the lens body from the rear end portion.

According to this aspect , for a vehicle comprising a light source and a lens body arranged in front of the light source, and configured to form a light distribution pattern including a cut-off line (for example, a low beam light distribution pattern) on the upper edge. It is possible to suppress a decrease in light utilization efficiency in a lamp. This is due to the provision of a reflecting surface that reflects light other than the light directly incident on the inside of the lens body from the light source and causes the light to be incident on the inside of the lens body from the rear end portion of the lens body.

According to the present invention, a vehicle is provided with a light source and a lens body arranged in front of the light source, and is configured to form a light distribution pattern including a cut-off line (for example, a low beam light distribution pattern) at the upper end edge. In a lamp, it is possible to suppress a decrease in light utilization efficiency.

It is a vertical sectional view of the vehicle lamp 10 which is 1st Embodiment of this invention. (A) is a perspective view of the lens body 12 seen from the front, and (b) is a perspective view of the lens body 12 seen from the rear. (A) is a top view of the lens body 12, (b) is a bottom view, and (c) is a side view. (A) A diagram showing how the light from the light source 14 (to be exact, the reference point F) is incident on the incident surface 12a, and (b) the light from the light source 14 (direct light RayA) incident on the inside of the lens body 12. It is a figure which shows the state of condensing light. It is an example (cross-sectional view) of the incident surface 12a. It is another example (cross-sectional view) of the incident surface 12a. (A) (b) It is a figure for demonstrating the distance between the incident surface 12a and the light source 14. It is a figure for demonstrating the role of a shade 12c. (A) A schematic view of the shade 12c seen from the position of the light source 14, (b) an enlarged perspective view of the reflecting surface 12b (including the shade 12c) shown in FIG. 2 (a), (c) FIG. 2 (a). It is a top view of the reflection surface 12b (including the shade 12c) shown in 1. It is a modification (side view) of the shade 12c (a) to (c). (A) An example of a low beam light distribution pattern P1 formed on a virtual vertical screen (arranged about 25 m ahead of the vehicle front) facing the front of the vehicle by the vehicle lighting fixture 10 of the first embodiment. (B) An example of the low beam light distribution pattern P2, and (c) an example of the low beam light distribution pattern P3. It is a diagram for explaining a light source image I _Cs1 ~I _{C s4} by the light from the light source 14 in each section Cs1 to Cs4. (A) When the reflecting surface 12b is arranged in the horizontal direction, a diagram depicting how the reflected light RayB'internally reflected by the reflecting surface 12b travels in a direction not incident on the emitting surface 12d, (b) reflecting surface 12b. It is a figure which depicts how the reflected light RayB which was internally reflected by the reflecting surface 12b travels in the direction which it is incident on the emitting surface 12d when it is arranged at an angle with respect to the 1st reference axis AX1. (A) When the reflecting surface 12b is arranged in the horizontal direction, by extending the reflecting surface 12b upward, the reflected light RayB'traveling in a direction not incident on the emitting surface 12d can be taken in. b) When the reflecting surface 12b is arranged at an angle with respect to the first reference axis AX1, more light (reflected light RayB internally reflected by the reflecting surface 12b) can be taken in without extending the reflecting surface 12b upward. It is a diagram depicting how it can be done. (A) The second reference axis AX2 was arranged in the horizontal direction, and the light from the light source 14 incident on the inside of the lens body 12 was focused toward the shade 12c toward the second reference axis AX2 at least in the vertical direction. In this case, a diagram depicting how most of the light from the light source 14 incident on the inside of the lens body 12 is blocked by the shade 12c, (b) the second reference axis AX2 is arranged at an angle with respect to the first reference axis AX1. When the light from the light source 14 incident on the inside of the lens body 12 is focused toward the shade 12c toward the second reference axis AX2 at least in the vertical direction, the light taken in by the exit surface 12d (the inner surface of the reflection surface 12b). It is a figure which showed how the reflected reflected light RayB) increases. It is a perspective view of the vehicle lamp 10A which is the 2nd Embodiment of this invention. (A) is a vertical cross-sectional view of the vehicle lamp 10A, and (b) is a view showing how the light from the light source 14 travels inside the lens body 12A. It is a top view which shows the appearance that the vehicle lamp 10 (the plurality of lens bodies 12) of the 1st Embodiment are arranged in a row. (A) is a front view showing a state in which a plurality of vehicle lamps 10A (a plurality of lens bodies 12A) of the second embodiment are arranged in a horizontal direction, and (b) a top view. (A) An example of a low beam light distribution pattern P1a formed on a virtual vertical screen (arranged about 25 m ahead of the vehicle front) facing the front surface of the vehicle by the vehicle lighting tool 10A of the second embodiment. (B) An example of the low beam light distribution pattern P1b, and (c) an example of the low beam light distribution pattern P1c. (A) is a top view, (b) a side view, and (c) a bottom view of the lens body 12A of the second embodiment. It is an example (cross-sectional view) of the first incident surface 12a. It is a perspective view for demonstrating the lens body 12A (the first exit surface 12A1a, the second incident surface 12A2a and the second exit surface 12A2b) of the 2nd Embodiment. It is a figure for demonstrating the normal of each of the 1st exit surface 12A1a, the 2nd incident surface 12A2a, and the 2nd exit surface 12A2b. It is a figure explaining the lens body 12B which is the 1st modification of the lens body 12A of 2nd Embodiment. It is a perspective view for demonstrating the lens body 12C (the first exit surface 12A1a, the second incident surface 12A2a and the second exit surface 12A2b) which is the 2nd modification of the lens body 12A of 2nd Embodiment. It is a front view which shows the appearance that a plurality of vehicle lamps 10C (plurality of lens bodies 12C) are arranged in a row in the vertical direction. It is a schematic diagram of the direct projection type vehicle lamp 20 to which the idea of "disassembling the light collecting function" is applied. This is an example of a high beam light distribution pattern P _Hi formed on a virtual vertical screen (located about 25 m ahead of the vehicle front) facing the front of the vehicle. It is the schematic of the projector type vehicle lamp 30 which applied the idea of "disassembling the light condensing function". (A) Side view (main optical surface only), (b) Top view (main optical surface only), (c) Vehicle lighting fixture 10D of vehicle lighting fixture 10D (fifth embodiment) having a camber angle. Examples of low beam light distribution patterns, (d) side view (main optical surface only), (e) top view (main optical surface only) of the vehicle lamp 10A of the second embodiment without camber angle. , (F) is an example of a low beam light distribution pattern formed by the vehicle lamp 10A of the second embodiment. It is a top view (only the main optical surface) for demonstrating the problem when the camber angle is given. It is a figure for demonstrating the problem appearing in the light distribution pattern for a low beam when a camber angle is given. (A) is a cross-sectional view (main optical surface only) at position B shown in FIG. 32, and (b) is a cross-sectional view (only main optical surface) at position C shown in FIG. 32. (A) A perspective view (main optical surface only) of the vehicle lamp 10D of the present embodiment, and (b) a perspective view (main optical surface only) of the vehicle lamp 10A of the second embodiment. It is a front view of the vehicle lamp 10E (sixth embodiment) to which a slant angle is given. (A) A diagram for explaining a problem appearing in a low beam light distribution pattern when a slant angle is added, and (b) a diagram schematically showing FIG. 37 (a). (A) is a diagram for explaining that the problem (rotation) appearing in the low beam light distribution pattern is suppressed, and (b) is a diagram schematically showing FIG. 38 (a). (A) Side view (main optical surface only), (b) Top view (main optical surface only), (c) Vehicle lighting fixture of vehicle lighting fixture 10F (7th embodiment) provided with camber angle and slant angle. This is an example of a low beam light distribution pattern formed by 10F. (A) Side view (main optical surface only) of vehicle lighting fixture 10G of the first comparative example, (b) Top view (main optical surface only), (c) Example of light distribution pattern formed by vehicle lighting fixture 10G Is. (A) Side view (main optical surface only), (b) Top view (main optical surface only), (c) Example of light distribution pattern formed by vehicle lighting equipment 10H of the second comparative example. Is. (A) An example of a low beam light distribution pattern formed by the vehicle lamp 10D of the fifth embodiment (the same applies to the vehicle lamp 10F of the seventh embodiment) when the camber angle θ1 is 30 °, (b). This is an example of a low beam light distribution pattern formed by the vehicle lamp 10D of the fifth embodiment (the same applies to the vehicle lamp 10F of the seventh embodiment) when the camber angle θ1 is 45 °. It is sectional drawing (main optical surface only) of the vehicle lamp 10A of the 2nd Embodiment. (A) Of the second exit surface 12A2b, a part of the lower region 12A2b2 from which light upward is emitted with respect to the horizontal is physically cut to leave the upper region 12A2b1, and (b) the second exit surface. The surface shape (for example, curvature) of the partial region 12A2b2 is set so that the light Ray2 from the light source 14 emitted from the lower partial region 12A2b2 of the 12A2b is light parallel to or downward with respect to the first reference axis AX. This is an example in which the second exit surface 12A2b is adjusted and divided into an upper region 12A2b1 and a lower region 12A2b2. It is a top view (main optical surface only) of the vehicle lamp 10I in which the second reference axis AX2 is inclined with respect to the first reference axis AX1 in the top view. It is a perspective view of a vehicle lamp 10J (lens body 12J). (A) Top view, (b) Front view, and (c) Side view of the vehicle lamp 10J (lens body 12J). (A) An example of a low beam light distribution pattern _PLO (composite light distribution pattern) formed by a vehicle lamp 10J (lens body 12J), (b) to (d) distributed light of each part constituting FIG. 48 (a). This is an example of the patterns P _SPOT , P _MID , and P _WIDE . (A) Side view of the first optical system (main optical surface only), (b) Top view of the second optical system (main optical surface only), (c) Side view of the third optical system (main optical surface only) Is. (A) Front view of the first rear end portion 12A1aa of the first lens portion 12A1, (b) sectional view (schematic view) of AA in FIG. 50 (a), (c) BB in FIG. 50 (a). It is a cross-sectional view (schematic view). It is a front view (photograph) of a vehicle lamp 10J (lens body 12J) showing a state of multipoint light emission. (A) Side view (only the main optical surface omitting the first exit surface 12A1a) and (b) top view (main main optical surface omitting the first exit surface 12A1a) of the vehicle lighting tool 10E (lens body 12A) of the sixth embodiment. (Optical surface only), (d) side view (only the main optical surface omitting the first exit surface 12A1a), (e) top view (only the main optical surface omitting the first exit surface 12A1a). (A) is a top view in which the first exit surface 12A1a is added to FIG. 52 (b), and (b) is a top view in which the first exit surface 12A1a is added to FIG. 52 (d). (A) (b) This is an example of adjusting the surface shapes of the pair of left and right incident surfaces 42a and 42b and / or the pair of left and right side surfaces 44a and 44b constituting the second optical system. (A) (b) This is an example of adjusting the surface shape of the upper incident surface 42c constituting the third optical system. It is a perspective view of the vehicle lamp 10K (lens body 12K) of the eleventh embodiment. (A) Top view, (b) Front view, and (c) Side view of a vehicle lamp 10K (lens body 12K). (A) An example of a low beam light distribution pattern _PLO (composite light distribution pattern) formed by a vehicle lamp 10K (lens body 12K), (b) to (d) distributed light of each part constituting FIG. 58 (a). This is an example of the patterns P _SPOT , P _MID , and P _WIDE . (A) is a side view of the first optical system, and (b) is an enlarged side view. (A) is a top view of the second optical system, and (b) is a side view of the third optical system. (A) Front view of rear end 12Kaa of lens body 12K, (b) A1-A1 cross-sectional view (schematic view) of FIG. 61 (a), (c) B1-B1 cross-sectional view (schematic view) of FIG. 61 (a). Figure). (A) to (c) Incident surfaces 12a, 42a, 42b, 42c form a V-shape (or a part of the V-shape) that opens toward the front end portion 12Kbb side in top view and / or side view. It is a figure which shows that it is doing. (A)-(c) It is a figure which shows the optical path which the outside light RayCC and RayDD (for example, sunlight) which were incident on the inside of a lens body 12K from the exit surface 12Kb follow. It is a figure which arranges the light source 50 which resembles the outside light in front of the lens body 12K, and shows the optical path which the light from the light source 50 which incident into the inside of a lens body 12K from an exit surface 12Kb follows. (A) is a vertical cross-sectional view showing an optical path followed by light from a light source 14 incident on the inside of the lens body 12K of the eleventh embodiment, and (b) is a perspective view of the lens body 12L (a modified example). Figures (a) to (c) showing the measurement results (luminance distribution) of the exit surface 12Kb of the lens body 12L (this modification), (d) to (f) the lens bodies of the comparative examples (lens body of the eleventh embodiment). It is a figure which shows the measurement result (luminance distribution) of the exit surface 12Kb of 12K). (A) is a cross-sectional view showing an optical path followed by light from a light source 14 incident on the inside of the lens body 12K of the eleventh embodiment, and (b) is a perspective view of the lens body 12M (this modification). (A) (b) is a perspective view of a lens coupling body 16L in which a plurality of lens bodies 12L, which is a first modification of the lens body 12K of the eleventh embodiment, are connected. It is a perspective view of the vehicle lamp 10N (lens body 12N). (A) Top view, (b) Front view, and (c) Side view of a vehicle lamp 10N (lens body 12N). (A) Example of low beam light distribution pattern _PLO (composite light distribution pattern) formed by vehicle lighting equipment 10N (lens body 12N), (b) Example of spot light distribution pattern P _SPOT , (c) For mid Examples of the light distribution pattern P _{MID_L} , (d) an example of the mid light distribution pattern P _{MID_R} , and (e) an example of the wide light distribution pattern P _WIDE . (A) is a front view of the first rear end portion 12A1aa of the first lens portion 12A1, and (b) is a sectional view (schematic view) of BB of FIG. 72 (a). It is a cross-sectional view (only the main optical surface) of the 2nd optical system. It is a vertical sectional view (only the main optical surface) of the 2nd optical system. It is an enlarged perspective view near the second lower reflection surface 48a (and shade 48c) arranged on the left side. It is a side view (only the main optical surface) of the 3rd optical system. (A) A diagram showing glare that occurs when the light source 14 (light emitting surface) is 1 mm square and the relative positional relationship of the lens body 12J with respect to the light source 14 deviates by +0.2 mm in the Y direction (vertical direction) from the design value. , (B) is a diagram showing that glare does not occur in the mid light distribution pattern P _MID when the relative positional relationship of the lens body 12J with respect to the light source 14 is as designed. It is a figure which shows that glare occurs when the relative positional relationship of the lens body 12N with respect to a light source 14 deviates from a design value in a Y direction (vertical direction). (A) A vertical sectional view of a vehicle lamp 60 (lens body 62), and (b) a front view. (A) Example of high beam light distribution pattern P _Hi (composite light distribution pattern) formed by vehicle lighting equipment 60 (lens body 62), (b) Example of wide light distribution pattern P _{Hi_WIDE} , (c) For spots _{This is} an example of the light distribution pattern P _{Hi_SPOT} . (A) Front view of the rear end portion 62a of the lens body 62 (near the first incident surface 62a1, the second incident surface 62a2, and the reflecting surface 62a3 for the wide light distribution pattern), and (b) a modified example of the lens body 72. It is a front view of the rear end portion 62a (near the first incident surface 62a1, the second incident surface 62a2, and the reflecting surface 62a3 for the wide light distribution pattern) of a certain lens body 72C. It is a vertical cross-sectional view of a lens body 62 (a modified example). (A) A diagram showing how light from a light source 14 incident on the inside of a lens body 62 from an incident surface A (first incident surface 62a1 and second incident surface 62a2) for a wide light distribution pattern is diffused in the horizontal direction. (B) The light from the light source 14 incident on the inside of the lens body 62 from the incident surface 62a5 for the spot light distribution pattern is internally reflected and collimated by the reflecting surface 62a6 for the spot light distribution pattern. It is a figure. It is a vertical cross-sectional view of the exit surface 62b2 (variant example) for a spot light distribution pattern. It is a vertical cross-sectional view of a lens body 62 (a modified example). It is a vertical cross-sectional view of a lens body 62A (a modification). It is a vertical sectional view of the rear end portion 62a of a lens body 62B (a modified example). (A) A perspective view of the vehicle lighting fixture 70 (lens body 72) viewed from diagonally forward and downward, and (b) a perspective view of the vehicle lighting fixture 70 (lens body 72) viewed from diagonally above and rearward. (A) Top view, (b) Front view, and (c) Side view of the vehicle lamp 70 (lens body 72). It is an exploded perspective view of the vehicle lamp 70 (lens body 72). (A) An example of a wide light distribution pattern P _{Hi_WIDE} formed by a vehicle lamp 70 (lens body 72), and (b) an example of a spot light distribution pattern P _{Hi_SPOT} . It is a perspective view seen from the rear diagonally upper side of the 3rd lens part 62 _Hi . It is a vertical sectional view (schematic view) of a lens body 72. (A) Light from the third light source 14 _Hi incident on the inside of the third lens portion 62 _Hi Ray _{Hi_WIDE} is emitted from the front end portions 12A1bb (semi-cylindrical exit surface 12A2b) of the first and second lens portions 12N _Lo1 and 12N _Lo2. It is a side view and (b) top view which shows the state of emitting light. (A) A side view showing how the light Ray _{Hi_SPOT} from the third light source 14 _Hi incident on the inside of the third lens portion 62 _Hi is emitted from the emission surface 62b2 for the spot light distribution pattern, and (b) top view. .. It is a top view and (b) a front view of a lens body 72A (a modified example). (A) Front view of rear end portion 12A1aa of the lens body 12N constituting the vehicle lamp 10P, (b) sectional view (schematic view) of AA in FIG. 97 (a), (c) in FIG. 97 (a). BB sectional view (schematic diagram). FIG. 5 is a diagram showing a state in which the light Ray _OUT from the light source 14 spreading downward does not enter the inside of the lens body 12N in the vehicle lamp 10N of the twelfth embodiment. It is an example (top view) of the reflection surface RefA (deformation example). It is a figure which _{showed the} region which the reflected light from each reflection region Ref _SPOT , Ref _{MID_L} , and Ref _{MID_R} is distributed. (A) A diagram showing how the light Ray _OUT from the light source 14 spreading in the vertical direction does not enter the inside of the lens body 12N1 in the vehicle lamp 10N1, and (b) reflected by the vehicle lamp 10N1 of FIG. 101 (a). It is the figure which added the surface Ref (RefA). (A) In the vehicle lighting fixture 10 of the first embodiment (vehicle lighting fixture 10A of the second embodiment), a state in which the light Ray _OUT from the light source 14 spreading in the vertical and horizontal directions does not enter the inside of the lens bodies 12 and 12A is shown. FIG. 10B is a diagram in which a reflective surface RefB is added to the vehicle lamps 10 and 10A of FIG. 102A. It is a side view of the vehicle lamp 200 described in Patent Document 1.

Hereinafter, the vehicle lighting fixture according to the first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a vertical sectional view of a vehicle lamp 10 according to a first embodiment of the present invention.

As shown in FIG. 1, the vehicle lighting fixture 10 of the present embodiment includes a lens body 12, a light source 14 arranged in the vicinity of the incident surface 12a of the lens body 12, and a virtual vertical screen (vehicle) facing the front surface of the vehicle. It is configured as a vehicle headlight that forms a low beam light distribution pattern P1 or the like including a cut-off line CL1 to CL3 on the upper end edge shown in FIG. 11A or the like (arranged about 25 m forward from the front surface). ing.

2A is a perspective view of the lens body 12 seen from the front, FIG. 2B is a perspective view of the lens body 12 seen from the rear, and FIG. 3A is a top view of the lens body 12 and FIG. b) is a bottom view, and FIG. 3 (c) is a side view.

As shown in FIG. 1, the lens body 12 is a lens body having a shape extending along the first reference axis AX1 extending in the horizontal direction, and is an incident surface 12a, a reflecting surface 12b, a shade 12c, an emitting surface 12d, and an incident surface 12a. It includes a reference point F for optical design located in the vicinity. The entrance surface 12a, the reflection surface 12b, the shade 12c, and the exit surface 12d are arranged in this order along the first reference axis AX1. The material of the lens body 12 may be polycarbonate, other transparent resin such as acrylic, or glass.

The dotted line with an arrow at the tip in FIG. 1 represents the optical path of light from the light source 14 (more accurately, the reference point F) incident on the inside of the lens body 12.

The main functions of the lens body 12 are, firstly, the light from the light source 14 is taken into the lens body 12, and secondly, the light taken into the lens body 12 travels toward the exit surface 12d. The exit surface 12 is generated by the direct light RayA and the reflected light RayB internally reflected by the reflection surface 12b.
The luminous intensity distribution (light source image) formed in the vicinity of the focal point F _12d of d (lens unit) is inverted and projected to form a low beam light distribution pattern including a cut-off line at the upper end edge.

FIG. 4A is a diagram showing how the light from the light source 14 (to be exact, the reference point F) is incident on the incident surface 12a, and FIG. 4B is the light from the light source 14 incident on the inside of the lens body 12. (Direct light RayA
) Is a diagram showing how the light is condensed.

The incident surface 12a is formed at the rear end of the lens body 12, and is light from a light source 14 (more accurately, a reference point F in optical design) arranged in the vicinity of the incident surface 12a (see FIG. 4A). ) Is refracted and incident on the inside of the lens body 12 (for example, a free curved surface that is convex toward the light source 14), and the light (direct light RayA) from the light source 14 incident on the inside of the lens body 12 is at least in the vertical direction. With respect to the above, the surface shape thereof is configured so as to collect light toward the second reference axis AX2 toward the shade 12c (see FIG. 4B). The second reference axis AX2 passes through the center of the light source 14 (to be exact, the reference point F) and a point near the shade 12c, and is inclined forward and diagonally downward with respect to the first reference axis AX1 (to be exact). (See FIG. 1).

The light source 14 is, for example, a metal substrate (not shown) or a white L mounted on the surface of the substrate.
It is equipped with a semiconductor light emitting element (not shown) such as an ED light source (or a white LD light source). The number of semiconductor light emitting elements may be 1 or more. The light source 14 is a white LED light source (or white L).
It may be a light source other than the semiconductor light emitting device such as D light source). The light source 14 is in a posture in which its light emitting surface (not shown) is directed diagonally forward and downward, that is, in a posture in which the optical axis AX ₁₄ of the light source 14 coincides with the second reference axis AX 2 and is near the incident surface 12a of the lens body 12. It is arranged (near the reference point F). The light source 14, the optical axis AX ₁₄ of the light source 14 does not coincide with the second reference axis AX2 posture (e.g., the optical axis AX ₁₄ of the light source 14 is arranged in a horizontal direction position) with the lens body 12 It may be arranged near the incident surface 12a (near the reference point F).

When the light source 14 is a semiconductor light emitting element (for example, a white LED light source), the directional characteristic of the light emitted from the light source 14 (light emitting surface) is lumbar cyan and can be represented by I (θ) = I0 × cosθ. This represents the spread of the light emitted by the light source 14. However, I (θ) represents the light intensity from the optical axis AX ₁₄ of the angle theta inclined direction of the light source 14, I0 represents the intensity on the optical axis AX _14. In the light source 14, the luminous intensity on the optical axis AX ₁₄ (θ = 0) is maximized.

FIG. 5 is an example of the incident surface 12a (cross-sectional view), and FIG. 6 is another example of the incident surface 12a (cross-sectional view).
Is.

As shown in FIG. 5, in the incident surface 12a, the light (direct light RayA) from the light source 14 incident on the inside of the lens body 12 is focused toward the shade 12c toward the first reference axis AX1 in the horizontal direction. As described above, the surface shape is configured. As shown in FIG. 6, the incident surface 12a is the light (direct light RayA) from the light source 14 incident on the inside of the lens body 12 in the horizontal direction.
) May be configured so that the light is parallel to the reference axis AX1.

The degree of horizontal diffusion of the low beam light distribution pattern can be freely adjusted by adjusting the surface shape of the incident surface 12a (for example, the horizontal curvature of the incident surface 12a).

7 (a) and 7 (b) are diagrams for explaining the distance between the incident surface 12a and the light source 14.

By shortening the distance between the incident surface 12a and the light source 14 (see FIG. 7B), the incident surface 1
Compared with the case where the distance between 2a and the light source 14 is increased (see FIG. 7A), the light source image becomes smaller. As a result, the maximum luminous intensity of the luminous intensity distribution (and the low beam light distribution pattern) formed in the vicinity of the focal point F _{12d of} the exit surface 12d (lens portion) can be further increased.

Further, when the distance between the incident surface 12a and the light source 14 is shortened (see FIG. 7B), the distance between the incident surface 12a and the light source 14 is increased (see FIG. 7A). Compared with this, the light from the light source 14 taken into the lens body 12 increases (β> α). The result is a highly efficient lens body.

The reflecting surface 12b is a planar reflecting surface extending in the horizontal direction from the lower end edge of the incident surface 12a toward the front. The reflecting surface 12b is a reflecting surface that totally reflects the light incident on the reflecting surface 12b among the light from the light source 14 incident on the inside of the lens body 12, and does not use metal vapor deposition. Of the light from the light source 14 incident on the inside of the lens body 12, the light incident on the reflecting surface 12b is internally reflected by the reflecting surface 12b and directed toward the emitting surface 12d, and refracted by the emitting surface 12d and directed toward the road surface. That is, the reflected light RayB internally reflected by the reflecting surface 12b is folded back at the cut-off line as a boundary and superimposed on the light distribution pattern below the cut-off line. This will
A cut-off line is formed at the upper edge of the low beam light distribution pattern.

The reflecting surface 12b may be a planar reflecting surface inclined from the lower end edge of the incident surface 12a toward the front diagonally downward with respect to the first reference axis AX1 (see FIG. 14B). The advantage of arranging the reflecting surface 12b at an angle with respect to the first reference axis AX1 will be described later.

A shade 12c extending in the left-right direction is formed at the tip of the reflecting surface 12b.

FIG. 8 is a diagram for explaining the role of the shade 12c.

As shown in FIG. 8, the main role of the shade 12c is the light source 1 incident inside the lens body 12.
A part of the light from 4 is blocked, and a luminous intensity distribution (light source image) including a side corresponding to the cut-off line defined by the shade 12c is formed on the lower end edge near the focal point F _{12d of the} exit surface 12d (lens portion). It is to be.

9 (a) is a schematic view of the shade 12c seen from the position of the light source 14, and FIG. 9 (b) is FIG. 2 (a).
9 is an enlarged perspective view of the reflective surface 12b (including the shade 12c) shown in FIG. 9 (c), and FIG. 9 (c) is a top view of the reflective surface 12b (including the shade 12c) shown in FIG. 2 (a).

As shown in FIGS. 2 (a) and 9 (a) to 9 (c), the shade 12c has a side e1 corresponding to the left horizontal cut offline, a side e2 corresponding to the right horizontal cut offline, and a left horizontal. The side e3 corresponding to the diagonal cut-off line that connects the cut-off line and the right horizontal cut-off line is included.

The reflection surface 12b is between the first reflection region 12b1 between the lower end edge of the incident surface 12a and the side e1 corresponding to the left horizontal cut-off line, and between the lower end edge of the incident surface 12a and the side e2 corresponding to the right horizontal cut-off line. 2nd reflection area 12b2, 1st reflection area 12b1 and 2nd reflection area 1
It includes a third reflection region 12b3 between 2b2.

The first reflection region 12b1 is gradually curved upward as it approaches the side e1 corresponding to the left horizontal cut-off line from the lower end edge of the incident surface 12a, while the second reflection region 12b2 is
It extends horizontally from the lower edge of the incident surface 12a toward the front.

As a result, the side e1 corresponding to the left horizontal cut offline is arranged at a position one step higher than the side e2 corresponding to the right horizontal cut offline in the vertical direction (in the case of right-hand traffic).
Of course, the side e1 corresponding to the left horizontal cut-off line may be arranged at a position one step lower than the side e2 corresponding to the right horizontal cut-off line in the vertical direction (in the case of left-hand traffic).

The shade 12c has a groove portion corresponding to the left horizontal cut offline, a groove portion corresponding to the right horizontal cut offline, and an oblique cut offline connecting the left horizontal cut offline and the right horizontal cut offline at the tip of the reflective surface 12b. It can also be formed by forming a groove including a groove corresponding to.

10 (a) to 10 (c) show a modified example (side view) of the shade 12c. The shade 12c may extend upward from the tip of the reflective surface 12b (see FIG. 10 (a)) or may extend diagonally forward and upward in lateral view (FIG. 1).
0 (b)), may be curved and extended diagonally forward and upward (see FIG. 10 (c)). The shade 12c is not limited to these, and may have any shape as long as it shields a part of the light incident from the light source 14 incident on the inside of the lens body 12 so as not to travel toward the exit surface 12d. The shielded light may be used for other light distribution or light guides.

As shown in FIG. 1, the exit surface 12d is internally reflected by the direct light RayA and the reflection surface 12b that travel toward the emission surface 12d among the light from the light source 14 incident on the inside of the lens body 12, and then the exit surface 12d. A lens in which the focal point F _12d is set near the shade 12c (for example, near the center of the shade 12c in the left-right direction) on the surface (for example, a convex surface that is convex toward the front) emitted by the reflected light RayB traveling toward 12d. It is organized as a part. The exit surface 12d is formed by the direct light RayA and the reflected light RayB traveling toward the exit surface 12d.
The luminous intensity distribution (light source image) formed near the focal point F _12d of the lens unit) is inverted and projected to form a low beam light distribution pattern including a cut-off line at the upper end edge.

By increasing the distance (focal length) between the shade 12c and the exit surface 12d, the light source image becomes smaller than when the distance (focal length) between the shade 12c and the exit surface 12d is shortened. .. As a result, the luminous intensity distribution formed near the focal point F _{12d of} the exit surface 12d (lens portion) (
And the light distribution pattern for low beam), the maximum luminous intensity can be made higher.

Further, by shortening the distance between the exit surface 12d and the light source 14 (or shade 12c), the distance between the exit surface 12d and the light source 14 (or shade 12c) is increased as compared with the case where the distance is increased.
The direct light RayA and the reflected light B taken into the exit surface 12d increase. As a result, efficiency increases.

The degree of diffusion of the low beam light distribution pattern in the horizontal and vertical directions is 12d on the exit surface.
It can be freely adjusted by adjusting the surface shape of.

The surface connecting the tip edge of the reflection surface 12b and the lower end edge of the exit surface 12d is an inclined surface extending diagonally forward and downward from the tip edge of the reflection surface 12b. The surface connecting the tip edge of the reflecting surface 12b and the lower end edge of the emitting surface 12d is not limited to this, and any surface that does not block the direct light RayA and the reflected light RayB traveling toward the emitting surface 12d is used. It may be a surface.
Similarly, the surface connecting the upper end edge of the incident surface 12a and the upper end edge of the exit surface 12d is the incident surface 12a.
It is a flat surface extending in the horizontal direction between the upper end edge of the surface and the upper end edge of the exit surface 12d.
The surface connecting the upper end edge of the incident surface 12a and the upper end edge of the exit surface 12d is not limited to this.
Any surface may be used as long as it does not block the direct light RayA and the reflected light RayB traveling toward the exit surface 12d.

In the lens body 12 having the above configuration, the light incident on the inside of the lens body 12 from the incident surface 12a is focused in the vertical direction toward the shade 12c toward the second reference axis AX2 (as shown in FIG. 1). For example, the light is focused on the center of the shade 12c). When the surface shape of the incident surface 12a is configured as shown in FIG. 5, the light incident on the inside of the lens body from the incident surface 12a is directed toward the shade 12c in the horizontal direction as shown in FIG. 1st reference axis AX1
Condensing closer (for example, condensing in the center of shade 12c).

As described above, the direct light RayA that collects light in the vertical direction and the horizontal direction and the reflected light RayB that is internally reflected by the reflecting surface 12b travel toward the emitting surface 12d and are emitted from the emitting surface 12d. At that time, the direct light RayA and the reflected light RayB traveling toward the exit surface 12d provide a side corresponding to the cut-off line defined by the shade 12c at the lower end edge near the focal point F _12d of the exit surface 12d (lens portion). A light intensity distribution (light source image) including is formed. Then, the exit surface 12d reversely projects this luminous intensity distribution on the virtual vertical screen, and FIG. 11 (
A low beam light distribution pattern P1 including a cut-off line is formed on the upper end edge shown in a).

The low beam light distribution pattern P1 has a relatively high central luminous intensity and is excellent in distant visibility. This is because the light source 14 is arranged near the incident surface 12a (near the reference point F) of the lens body 12 in a posture in which the optical axis AX ₁₄ of the light source 14 coincides with the second reference axis AX2, and is relative. This is because the light (direct light) on the optical axis AX ₁₄ having a high intensity (luminous intensity) is focused toward the shade 12c toward the second reference axis AX2 (for example, focused on the center of the shade 12c). is there.

By adjusting the surface shape (for example, curvature) of the incident surface 12a and / or the exit surface 12d, a horizontally diffused low beam light distribution pattern P2 is formed as shown in FIG. 11B. You can also.

Further, by increasing the inclination of the second reference axis AX2 with respect to the first reference axis AX1 (see the angle θ shown in FIG. 1), the lower end edges of the low beam light distribution patterns P1 and P2 can be extended downward.

On the other hand, when the surface shape of the incident surface 12a is configured as shown in FIG. 6, the light incident on the inside of the lens body 12 from the incident surface 12a is the first reference axis in the horizontal direction as shown in FIG. A
The light is parallel to X1.

As described above, the direct light RayA that is focused in the vertical direction and parallel in the horizontal direction and the reflected light RayB that is internally reflected by the reflecting surface 12b travel toward the emitting surface 12d and are emitted from the emitting surface 12d. .. At that time, the direct light RayA and the reflected light RayB traveling toward the exit surface 12d correspond to the cut-off line CL1 to CL3 defined by the shade 12c on the lower end edge near the focal point F _12d of the exit surface 12d (lens portion). A luminosity distribution (light source image) including the side where the light is generated is formed. Then, the exit surface 12d reversely projects this luminous intensity distribution to form a low beam light distribution pattern P3 including cut-off lines CL1 to CL3 at the upper end edge shown in FIG. 11C on a virtual vertical screen. The low-beam light distribution pattern P3 shown in FIG. 11C is diffused in the horizontal direction from the low-beam light distribution pattern P1 shown in FIG. 11A because it is not focused in the horizontal direction.

Next, the relationship between the light source image due to the light from the light source 14 incident inside the lens body 12 and the low beam light distribution pattern will be described.

FIG. 12 is a diagram for explaining a light source image by light from the light source 14 in each cross section Cs1 to Cs3.

As shown in FIG. 12, the external shape of the light source image I _Cs1, I _Cs2 in the cross section Cs1, Cs2 are
It has the same outer shape as the light source (similar to the outer shape of the light source 14 and larger as a light source image).

On the other hand, the light source image I _Cs3 in the cross section Cs3 after passing through the reflecting surface 12b and the shade 12c.
The outer shape of is cut-off line CL1 to C defined by the shade 12c on the lower end edge.
It includes the sides e1, e2, and e3 corresponding to L3. This light source image _ICs3 has an exit surface 12
It is inverted by the action of d (lens unit), and the upper end edge includes the sides e1, e2, and e3 corresponding to the cut-off lines CL1 to CL3 defined by the shade 12c.

The low beam light distribution patterns P1 to P3 shown in FIGS. 11 (a) to 11 (c) have sides e corresponding to the cut-off line CL1 to CL3 defined by the shade 12c on the upper end edge thereof.
Since it is formed based on a light source image including 1, e2, and e3, it includes clear cut-off lines CL1, CL2, and CL3 at the upper end edge.

Next, regarding the advantage of arranging the reflecting surface 12b at an angle with respect to the first reference axis AX1,
This will be described in comparison with the case where the reflecting surface 12b is arranged in the horizontal direction.

The first advantage is that it is possible to reduce stray light and improve efficiency as compared with the case where the reflecting surface 12b is arranged in the horizontal direction.

That is, as shown in FIG. 13A, when the reflecting surface 12b is arranged in the horizontal direction, the reflected light RayB'internally reflected by the reflecting surface 12b travels in a direction not incident on the emitting surface 12d. It becomes. As a result, efficiency is reduced.

On the other hand, as shown in FIG. 13B, when the reflecting surface 12b is arranged at an angle with respect to the first reference axis AX1, the reflection surface 12b reflects the inner surface and the reflection progresses toward the exit surface 12d. The light RayB increases, and the light taken in by the emitting surface 12d (reflected light internally reflected by the reflecting surface 12b) increases. As a result, it is possible to reduce stray light and improve efficiency as compared with the case where the reflecting surface 12b is arranged in the horizontal direction.

In the simulation performed by the inventors of the present application, when the reflecting surface 12b is arranged at an inclination of 5 ° with respect to the first reference axis AX1, the efficiency is increased by 33.8%, and when the reflecting surface 12b is arranged at an inclination of 10 °.
Efficiency increased by 60%.

The second advantage is that the lens body 12 can be downsized as compared with the case where the reflecting surface 12b is arranged in the horizontal direction.

That is, as shown in FIG. 13A, when the reflecting surface 12b is arranged in the horizontal direction, the reflected light RayB'internally reflected by the reflecting surface 12b travels in a direction not incident on the emitting surface 12d. It becomes. The exit surface 12d can take in the stray light RayB'by extending it upward as shown in FIG. 14A, but the exit surface 12d becomes larger by the amount of extending it upward.

On the other hand, as shown in FIG. 14B, when the reflecting surface 12b is arranged at an angle with respect to the first reference axis AX1, the emitting surface 12d does not extend this upward, and more light ( The reflected light RayB) internally reflected by the reflecting surface 12b can be taken in. As a result, the size of the exit surface 12d (and thus the lens body 12) can be reduced as compared with the case where the reflection surface 12b is arranged in the horizontal direction.

In the simulation performed by the inventors of the present application, when the reflecting surface 12b is arranged at an angle of 5 ° with respect to the first reference axis AX1, the height A (light emitted from the emitting surface 12d) shown in FIG. 14B is shown. The height in the vertical direction) is reduced by 8% as compared with the case shown in FIG. 14 (a), and when the height A is tilted by 10 °, the height A shown in FIG. 14 (b) is shown in FIG. 14 (a). It decreased by 18.1% compared to the case shown.

Next, the second reference axis AX2 is arranged at an angle with respect to the first reference axis AX1, and the light from the light source 14 incident on the inside of the lens body 12 is directed toward the shade 12c at least in the vertical direction. Regarding the advantage of condensing light closer to AX2, the second reference axis AX2 is arranged in the horizontal direction, and the light from the light source 14 incident on the inside of the lens body 12 is directed at least in the vertical direction.
This will be described in comparison with the case where the light is focused toward the second reference axis AX2 toward the shade 12c.

This advantage is that the second reference axis AX2 is arranged in the horizontal direction, and the light from the light source 14 incident on the inside of the lens body 12 is directed toward the shade 12c at least in the vertical direction.
Compared to the case where the light is focused closer to 2, the stray light can be reduced and the efficiency can be improved.

That is, as shown in FIG. 15A, the second reference axis AX2 is arranged in the horizontal direction, and the light from the light source 14 incident on the inside of the lens body 12 is directed by the shade 12c at least in the vertical direction.
When the light is focused toward the second reference axis AX2, the light source 1 incident inside the lens body 12
Most of the light from 4 is blocked by the shade 12c. As a result, efficiency is significantly reduced. Further, in FIG. 15A, assuming that the reflecting surface corresponding to the reflecting surface 12b is added, the reflected light internally reflected by the reflecting surface becomes stray light traveling in a direction not incident on the emitting surface 12d.

On the other hand, as shown in FIG. 15B, the second reference axis AX2 is arranged at an angle with respect to the first reference axis AX1, and the light from the light source 14 incident on the inside of the lens body 12 is at least vertical. With respect to the direction, when the light is focused toward the second reference axis AX2 toward the shade 12c, the exit surface 1
The light taken in by 2d (reflected light RayB internally reflected by the reflecting surface 12b) increases. As a result, when the second reference axis AX2 is arranged in the horizontal direction and the light from the light source 14 incident on the inside of the lens body 12 is focused toward the second reference axis AX2 toward the shade 12c at least in the vertical direction. Compared with this, it is possible to reduce stray light and improve efficiency.

As described above, according to the present embodiment, firstly, it is possible to provide a lens body 12 in which a reflective surface due to metal vapor deposition, which causes an increase in cost, is omitted, and a vehicle lamp 10 using the lens body 12. Secondly, the present invention provides a lens body 12 capable of suppressing melting of the lens body 12 and a decrease in the output of the light source 14 due to the heat generated by the light source 14, and a vehicle lamp 10 using the lens body 12. can do.

It is the light source 1 that can omit the reflective surface due to metal vapor deposition, which causes an increase in cost.
The light from 4 is refracted on the incident surface 12a and reflected on the incident surface 12b, not on the reflective surface due to metal deposition.
This is due to being controlled by internal reflection at.

It is possible to prevent the lens body 12 from melting or the output of the light source 14 from decreasing due to the heat generated by the light source 14, because the incident surface 12a is formed at the rear end of the lens body 12. This is because the light source 14 is arranged outside the lens body 12 (that is, at a position separated from the incident surface 12a of the lens body 12).

Next, the vehicle lighting fixture according to the second embodiment of the present invention will be described with reference to the drawings.

16 is a perspective view of a vehicle lamp 10A according to a second embodiment of the present invention, FIG. 17A is a vertical sectional view, and FIG. 17B is a state in which light from a light source 14 travels inside the lens body 12A. It is a figure which shows.

Comparing the vehicle lamp 10A of the present embodiment with the vehicle lamp 10 of the first embodiment,
The two differ mainly in the following points.

First, in the vehicle lamp 10 of the first embodiment, the light emitting surface 12d, which is the final light emitting surface of the lens body 12, is mainly in charge of light collection in the horizontal direction and light collection in the vertical direction. On the other hand, in the vehicle lamp 10A of the present embodiment, the first lens unit 12 mainly collects light in the horizontal direction.
The point that the first exit surface 12A1a of A1 is in charge, and the second exit surface 12A2b of the second lens portion 12A2, which is the final exit surface of the lens body 12A, is mainly in charge of light collection in the vertical direction. That is, the vehicle lamp 10A of the present embodiment adopts the idea of "disassembling the condensing function".

Secondly, in the vehicle lighting equipment 10 of the first embodiment, since it is in charge of light collection in the horizontal direction and light collection in the vertical direction, the emission surface 12d, which is the final emission surface of the lens body 12, is hemispherical. (See FIG. 2 (a)), whereas the vehicle lamp 10A of the present embodiment is in charge of light collection in the horizontal direction, the first surface is formed as a hemispherical refracting surface. Since the first exit surface 12A1a of the lens unit 12A1 is configured as a semi-cylindrical surface (semi-cylindrical refracting surface) extending in the vertical direction (see FIG. 23) and is in charge of light collection in the vertical direction, the lens body. A point in which the second exit surface 12A2b of the second lens portion 12A2, which is the final exit surface of 12A, is configured as a semi-cylindrical surface (semi-cylindrical refracting surface) extending in the horizontal direction (see FIG. 23).

Thirdly, in the vehicle lamp 10 of the first embodiment, the result that the exit surface 12d, which is the final emission surface of the lens body 12, is configured as a hemispherical surface (semi-cylindrical refracting surface). Even if a plurality of vehicle lamps 10 (plural lens bodies 12) are arranged in a row (see FIG. 18), the appearance of the dots is continuous, and the vehicle lamps have a sense of unity extending in a line in a predetermined direction. (Lens coupling) cannot be configured, whereas in the vehicle lamp 10A of the present embodiment, the second emission surface 12A2b, which is the final emission surface of the lens body 12A, extends in the horizontal direction. As a result of being configured as a columnar surface (semi-cylindrical refracting surface), a plurality of vehicle lamps 10A
By arranging (a plurality of lens bodies 12A) in a row (see FIGS. 19 (a) and 19 (b)), a vehicle lamp (lens coupling body 16) having a sense of unity extending horizontally in a line shape has a sense of unity. )
The point that can be configured. Note that FIG. 18 is a top view showing a state in which a plurality of vehicle lamps 10 (plurality of lens bodies 12) of the first embodiment are arranged in a row.

Other than that, it has the same configuration as the vehicle lamp 10 of the first embodiment. Hereinafter, the differences from the vehicle lighting fixture 10 of the first embodiment will be mainly described, and the vehicle lighting fixture 10 of the first embodiment will be described.
The same components as those in the above are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 16 and 17 (b), the vehicle lamp 10A of the present embodiment includes the light source 14, the first lens unit 12A1 and the second lens unit 12A2, and the light from the light source 14 is the first lens. The first lens portion 1 is incident on the inside of the first lens portion 12A1 from the first incident surface 12a of the portion 12A1.
After being partially shielded by the shade 12c of the 2A1, the lens is emitted from the first exit surface 12A1a of the first lens portion 12A1 and further emitted from the second incident surface 12A2a of the second lens portion 12A2.
A virtual vertical screen facing the front of the vehicle (arranged about 25 m ahead of the front of the vehicle) by being incident on the inside of the lens portion 12A2, emitting from the second exit surface 12A2b of the second lens portion 12A2, and irradiating forward. The shade 12c is on the upper edge as shown in FIG. 20 (a) and the like.
Light distribution pattern P for low beam including cut-off line CL1 to CL3 specified by
Lens body 12A configured to form 1a and the like (corresponding to the predetermined light distribution pattern of the present invention).
It is configured as a vehicle headlight equipped with.

21 (a) is a top view of the lens body 12A of the second embodiment, and FIG. 21 (b) is a side view and FIG.
1 (c) is a bottom view. FIG. 22 is an example of the first incident surface 12a (cross-sectional view), and FIG. 23 is the second.
It is a perspective view for demonstrating the lens body 12A (the first exit surface 12A1a, the second incident surface 12A2a and the second exit surface 12A2b) of an embodiment.

As shown in FIGS. 17 (a) and 21 (a) to 21 (c), the lens body 12A is a lens body having a shape extending along the first reference axis AX extending in the horizontal direction, and is a first lens. It includes a portion 12A1, a second lens portion 12A2, and a connecting portion 12A3 that connects the first lens portion 12A1 and the second lens portion 12A2.

The first lens unit 12A1 includes a first incident surface 12a, a reflecting surface 12b, a shade 12c, a first emitting surface 12A1a, and an optical design reference point F arranged in the vicinity of the first incident surface 12a. The second lens unit 12A2 includes a second incident surface 12A2a and a second exit surface 12A2b. First incident surface 12a, reflecting surface 12b, shade 12c, first emitting surface 12A1a, second
The entrance surface 12A2a and the second exit surface 12A2b are arranged in this order along the first reference axis AX1.

The first lens portion 12A1 and the second lens portion 12A2 are connected by a connecting portion 12A3.

In the connecting portion 12A3, the first lens portion 12A1 and the second lens portion 12A2 are surrounded by the first emitting surface 12A1a, the second incident surface 12A2a, and the connecting portion 12A3 at the upper portions thereof (the others are open). The spaces S are connected in a formed state.

The lens body 12A is integrally molded (by injection molding) by injecting a transparent resin such as polycarbonate or acrylic into a mold, cooling and solidifying the lens body 12A.

The space S is formed by a mold whose drawing direction is opposite to that of the connecting portion 12A3 (see the arrow in FIG. 17A). In order to smoothly pull out the mold, the first exit surface 12A1a and the second incident surface 12A2a are set with a draft angle α and β (also referred to as a draft, preferably 2 ° or more), respectively. As a result, it is possible to perform die cutting by punching up and down at the time of molding, and the lens body 12 (and the lens coupling body 16 described later) can be manufactured at low cost by one die cutting (without using a slide). The material of the lens body 12A may be glass other than a transparent resin such as polycarbonate or acrylic.

The first incident surface 12a is formed at the rear end of the first lens portion 12A1, and the first incident surface 12a is formed.
A surface (for example, a free curved surface that is convex toward the light source 14) in which light from a light source 14 (more precisely, a reference point F in optical design) arranged in the vicinity of a is refracted and incident on the inside of the first lens portion 12A1. )so,
The light from the light source 14 incident on the inside of the first lens portion 12A1 is the shade 1 in the vertical direction.
Concentrate toward the second reference axis AX2 toward 2c (see FIG. 17B), and concentrate toward the shade 12c toward the first reference axis AX1 in the horizontal direction (see FIG. 22). The surface shape is configured. The first reference axis AX is a point near the shade 12c (for example,
It passes the focal point F _12A4 ) and extends in the front-rear direction of the vehicle. The second reference axis AX2 passes through the center of the light source 14 (to be exact, the reference point F) and a point near the shade 12c (for example, the focal point F _12A4 ), and is oblique forward with respect to the first reference axis AX1. It slopes downward. The surface of the first incident surface 12a is such that the light from the light source 14 incident on the inside of the first lens unit 12A1 is parallel to the reference axis AX1 in the horizontal direction (see FIG. 6). The shape may be configured.

The first exit surface 12A1a is light from the light source 14 emitted from the first exit surface 12A1a.
That is, of the light from the light source 14 incident on the inside of the first lens unit 12A1, the first exit surface 12
The first exit surface 12 after being internally reflected by the direct light traveling toward A1a and the reflecting surface 12b.
It is a surface that collects the reflected light traveling toward A1a in the horizontal direction (corresponding to the first direction of the present invention). Specifically, as shown in FIG. 23, the columnar axis is configured as a semi-cylindrical surface extending in the vertical direction. The focused line of the first exit surface 12A1a extends in the vertical direction in the vicinity of the shade 12c.

The second incident surface 12A2a is formed at the rear end of the second lens portion 12A2, and the first exit surface 12
A surface on which the light emitted from the light source 14 emitted from A1a is incident on the inside of the second lens portion 12A2, and is configured as, for example, a planar surface. Of course, not limited to this, the second incident surface 12A2
a may be configured as a curved surface.

The second exit surface 12A2b is a surface that collects the light emitted from the light source 14 emitted from the second exit surface 12A2b in the vertical direction (corresponding to the second direction of the present invention). Specifically, as shown in FIG. 23, the columnar axis is configured as a semi-cylindrical surface extending in the horizontal direction. The focused line of the second exit surface 12A2b extends in the horizontal direction in the vicinity of the shade 12c.

The focal point F _{12A4 of the} lens 12A4 composed of the first exit surface 12A1a and the second lens portion 12A2 (second incident surface 12A2a and second exit surface 12A2b) having the above _{configuration} is the focal point F _12d of the exit surface 12d of the first embodiment. Similar to the above, the shade 12c is set near the center (for example, near the center of the shade 12c in the left-right direction). The lens 12A4 is the light from the light source 14 incident on the inside of the first lens portion 12A1, that is, the first lens 12A4, similarly to the exit surface 12d of the first embodiment.
Of the light from the light source 14 incident on the inside of the lens unit 12A1, the direct light traveling toward the first emitting surface 12A1a and the reflected light traveling toward the first emitting surface 12A1a after being internally reflected by the reflecting surface 12b. , The light intensity distribution formed near the focal point F _{12A4 of the} lens 12A4 (
The light source image) is inverted and projected to form a low beam light distribution pattern P1a or the like including cut-off lines CL1 to CL3 on the upper end edge shown in FIG. 20A or the like on a virtual vertical screen.

The basic surface shape of the second exit surface 12A2b is as described above, but the first exit surface 12A
Since the draft angles α and β are set on the 1a and the second incident surface 12A2a, they are actually adjusted as follows.

FIG. 24 is a diagram for explaining the normals of the first exit surface 12A1a, the second entrance surface 12A2a, and the second exit surface 12A2b.

That is, when the first exit surface 12A1a and the second incident surface 12A2a are set with the extraction angles α and β, as shown in FIG. 24, the method of passing through the centers of the first exit surface 12A1a and the second incident surface 12A2a. Lines N _12A1a and N _12A2a are tilted with respect to the horizontal. In this case, the second exit surface 1
When the normal line N _12A2b passing through the center of _2A2b extends in the horizontal direction, the light emitted from the light source 14 emitted from the second exit surface 12A2b becomes light traveling diagonally upward with respect to the horizontal, which causes glare. There is a fear.

In order to suppress this, the surface shape of the second exit surface 12A2b is adjusted so that the light emitted from the light source 14 emitted from the second exit surface 12A2b is parallel to the first reference axis AX1. ing. For example, the second exit surface 12A2b has a normal line N ₁₂ so that the light emitted from the light source 14 emitted from the second exit surface 12A2b is parallel to the first reference axis AX1.
_A2b is adjusted to a surface shape that is inclined diagonally forward and upward. This adjustment is finally an adjustment for aligning the focal point F _{12A4 of the} lens 12A4 including the first exit surface 12A1a and the second lens portion 12A2 (the second incident surface 12A2a and the second exit surface 12A2b) with the vicinity of the shade 12c position. Is. The line with an arrow at the tip in FIG. 24 represents the optical path of light from the light source 14 (more accurately, the reference point F) incident on the inside of the lens body 12A.

The surface connecting the tip edge of the reflection surface 12b and the lower end edge of the first exit surface 12A1a is the reflection surface 12
It is said to be an inclined surface extending diagonally forward and downward from the tip edge of b, but it is not limited to this, and the second
Any surface may be used as long as it does not block the light from the light source 14 traveling toward the exit surface 12A2b. Similarly, the upper surface of the lens body 12A, that is, the surface connecting the upper end edge of the first incident surface 12a and the upper end edge of the second exit surface 12A2b is a surface extending in a substantially horizontal direction. The surface may be any surface as long as it does not block the light from the light source 14 traveling toward the second exit surface 12A2b. Similarly, both sides of the lens body 12A, that is,
The surface connecting the left and right edge edges of the first incident surface 12a and the left and right edge edges of the second exit surface 12A2b is a first surface.
It is an inclined surface that tapers toward the incident surface 12a (see FIG. 21A), but is not limited to this, and is a surface that does not block the light from the light source 14 traveling toward the second exit surface 12A2b. Any aspect may be used as long as it is.

In the vehicle lamp 10A (lens body 12A) having the above configuration, the light from the light source 14 is emitted from the first incident surface 12a to the first lens unit 1 of the first lens unit 12A1 as shown in FIG. 17B.
After entering the inside of 2A1 and being partially shielded by the shade 12c of the first lens portion 12A1, the lens is emitted from the first exit surface 12A1a of the first lens portion 12A1. At that time, the first exit surface 12
The light from the light source 14 emitted from A1a is focused in the horizontal direction by the action of the first exit surface 12A1a (see FIG. 22; is not focused or is hardly focused in the vertical direction). Then, the light emitted from the light source 14 emitted from the first exit surface 12A1a passes through the space S, and further enters the inside of the second lens portion 12A2 from the second incident surface 12A2a of the second lens portion 12A2 to the second. It is emitted from the second exit surface 12A2b of the lens unit 12A2 and is irradiated forward. At that time, the light from the light source 14 emitted from the second exit surface 12A2b is the light emitted from the second exit surface 12A2.
Due to the action of b, it is focused in the vertical direction (see FIG. 17 (b). It is not focused in the horizontal direction or is hardly focused). As a result, FIG. 20 (a) is displayed on the virtual vertical screen.
) Etc., the cut-off line CL1 to CL3 specified by the shade 12c on the upper edge
A low beam light distribution pattern P1a or the like (corresponding to a predetermined light distribution pattern of the present invention) including the above is formed.

The low beam light distribution pattern P1a or the like has a relatively high central luminous intensity and is excellent in distant visibility. This is because the light source 14 is arranged near the incident surface 12a (near the reference point F) of the lens body 12A in a posture in which the optical axis AX ₁₄ of the light source 14 coincides with the second reference axis AX2, and is relative. Light (direct light) on the optical axis AX ₁₄ having a high intensity (luminous intensity) is focused toward the shade 12c toward the second reference axis AX2 (for example, focused on the center of the shade 12c).
It is due to that.

The degree of diffusion of the low beam light distribution pattern in the horizontal direction and / or the vertical direction is determined by adjusting the surface shape (for example, curvature) of the first emission surface 12A1a and / or the second emission surface 12A2b. )-As shown in FIG. 20 (c), it can be freely adjusted. For example, the degree of diffusion of the low beam light distribution pattern in the horizontal direction can be freely adjusted by adjusting the surface shape (for example, curvature) of the first exit surface 12A1a. Similarly, the degree of diffusion of the low beam light distribution pattern in the vertical direction can be freely adjusted by adjusting the surface shape (for example, curvature) of the second exit surface 12A2b.

FIG. 19A is a front view showing a state in which a plurality of vehicle lamps 10A (plurality of lens bodies 12A) of the second embodiment are arranged in a row in the horizontal direction, and FIG. 19B is a top view.

As shown in FIGS. 19A and 19B, the lens coupling body 16 includes a plurality of lens bodies 12A. The lens coupling body 16 (plurality of lens bodies 12A) is integrally molded (injection molding) by injecting a transparent resin such as polycarbonate or acrylic into a mold, cooling and solidifying the mold. The second exit surfaces 12A2b of each of the plurality of lens bodies 12A are arranged in a horizontal row in a state of being adjacent to each other, and form a group of semi-cylindrical exit surfaces having a sense of unity extending in a horizontal line. are doing.

By using the lens coupling 16 having the above configuration, it is possible to construct a vehicle lamp with a sense of unity extending in a line in the horizontal direction. The lens coupling body 16 may be formed by molding a plurality of lens bodies 12 in a physically separated state and connecting (holding) them with a holding member (not shown) such as a lens holder.

As described above, according to the present embodiment, in addition to the effects of the first embodiment, further
The following effects can be achieved.

That is, firstly, the lens body 12A having a sense of unity extending in a horizontal line shape.
(Lens coupling 16) and a vehicle lamp 10A using the same can be provided. 2nd
In addition, although the second exit surface 12A2b, which is the final exit surface, is a semi-cylindrical surface (a semi-cylindrical refracting surface extending in the horizontal direction), the low beam is focused in the horizontal and vertical directions. It is possible to provide a lens body 12A (lens coupling body 16) capable of forming a light distribution pattern P1a and the like, and a vehicle lighting tool 10A using the lens body 12A).

A semi-cylindrical surface (a semi-cylindrical refracting surface extending in the horizontal direction) in which the second exit surface 12A2b, which is the final exit surface, can be made to look like a line extending in the horizontal direction. )
This is due to the fact that it is configured as.

Although the second exit surface 12A2b, which is the final exit surface, is a semi-cylindrical surface (a semi-cylindrical refracting surface extending in the horizontal direction), the low beam arrangement is focused in the horizontal and vertical directions. The light pattern P1a and the like can be formed mainly by focusing in the horizontal direction.
The first exit surface 12A1a (a semi-cylindrical refracting surface extending in the vertical direction) of A1 is in charge, and the second lens portion 12A2 of the second lens portion 12A2, which is the final exit surface of the lens body 12A, mainly collects light in the vertical direction. 2 This is because the exit surface 12A2b (semi-cylindrical refracting surface extending in the horizontal direction) is in charge. That is, it is due to the decomposition of the light collecting function.

Further, according to the present embodiment, although the first exit surface 12A1a and the second incident surface 12A2a are set with the extraction angles α and β, the light is emitted from the second exit surface 12A2b, which is the final exit surface. Provided are a lens body 12A (lens coupling body 16) suitable for a vehicle lamp and a vehicle lamp 10A using the lens body 12A (lens coupling 16) in which the light from the light source 14 is parallel to the first reference axis AX1. Can be done.

Next, a modified example will be described.

FIG. 25 is a diagram illustrating a lens body 12B which is a first modification of the lens body 12A of the second embodiment.

As shown in FIG. 25, the lens body 12B of this modified example is formed in a state where the first lens portion 12A1 and the second lens portion 12A2 are physically separated, and both are connected by a holding member 18 such as a lens holder. It is configured by (holding). The first exit surface 12A1a and the second incident surface 12A2a have no draft angles α and β, and are plane shapes (or curved surface shapes) orthogonal to the reference axis AX1, respectively.

According to this modification, as a result of eliminating the need for the extraction angles α and β, the adjustment of the second exit surface 12A2b can be omitted.

FIG. 26 is a perspective view for explaining the lens body 12C (first exit surface 12A1a, second entrance surface 12A2a, and second exit surface 12A2b) which is a second modification of the lens body 12A of the second embodiment. is there.

The lens body 12C of this modified example corresponds to the one in which the first exit surface 12A1a and the second exit surface 12A2b) of the second embodiment are interchanged.

That is, the first exit surface 12A1a of the lens body 12C of this modified example is the first exit surface 12
This is a surface that collects light from the light source 14 emitted from A1a in the vertical direction (corresponding to the first direction of the present invention). Specifically, as shown in FIG. 26, the columnar axis is configured as a semi-cylindrical surface extending in the horizontal direction. In this case, the focused line of the first exit surface 12A1a is the shade 1.
It extends horizontally in the vicinity of 2c. Further, the second exit surface 12A2b of the lens body 12C of the present modification is a surface that collects the light emitted from the light source 14 emitted from the second emission surface 12A2b in the horizontal direction (corresponding to the second direction of the present invention). is there. Specifically, as shown in FIG.
The columnar axis is configured as a semi-cylindrical surface extending in the vertical direction. In this case, the focused line of the second exit surface 12A2b extends in the vertical direction in the vicinity of the shade 12c.

The focal point F _{12A4 of the} lens 12A4 including the first exit surface 12A1a and the second lens portion 12A2 (second incident surface 12A2a and second exit surface 12A2b) of the lens body 12C of the present modification is the same as in the second embodiment. It is set near the shade 12c (for example, near the center of the shade 12c in the left-right direction).

FIG. 27 is a front view showing a state in which a plurality of vehicle lamps 10C (plurality of lens bodies 12C) are arranged in a row in the vertical direction.

As shown in FIG. 27, the lens coupling body 16C includes a plurality of lens bodies 12C. The lens coupling body 16C (plurality of lens bodies 12C) is integrally molded (injection molding) by injecting a transparent resin such as polycarbonate or acrylic into a mold, cooling and solidifying the mold.
The second exit surfaces 12A2b of each of the plurality of lens bodies 12C are arranged in a row in the vertical direction in a state of being adjacent to each other, and form a group of semi-cylindrical exit surfaces having a sense of unity extending in a line in the vertical direction. are doing.

By using the lens coupling body 16C having the above configuration, it is possible to construct a vehicle lamp 10C having a sense of unity extending in a line in the vertical direction. The lens coupling 16C is
A plurality of lens bodies 12C may be formed in a physically separated state and connected (held) by a holding member (not shown) such as a lens holder.

According to this modification, firstly, it is possible to provide a lens body 12C (lens coupling body 16C) having a sense of unity extending in a line in the vertical direction and a vehicle lamp 10C using the same. Second, although the second exit surface 12A2b, which is the final exit surface, is a semi-cylindrical surface (a semi-cylindrical refracting surface extending in the vertical direction), the light is focused in the horizontal and vertical directions. Lens body 12C (lens coupling body 1) capable of forming the low beam light distribution pattern P1a and the like.
6C) and a vehicle lamp 10C using the same can be provided.

A semi-cylindrical surface (a semi-cylindrical refracting surface extending in the vertical direction) in which the second exit surface 12A2b, which is the final exit surface, can be made to look like a line extending in the vertical direction. )
This is due to the fact that it is configured as.

Despite the fact that the second exit surface 12A2b, which is the final exit surface, is a semi-cylindrical surface (a semi-cylindrical refracting surface extending in the vertical direction), the low beam arrangement is focused in the horizontal and vertical directions. The light pattern P1a and the like can be formed mainly by focusing in the vertical direction.
The first exit surface 12A1a (semi-cylindrical refracting surface extending in the horizontal direction) of A1 is in charge, and the second lens portion 12A2, which is the final exit surface of the lens body 12A, mainly collects light in the horizontal direction. 2 This is because the exit surface 12A2b (semi-cylindrical refracting surface extending in the vertical direction) is in charge. That is, it is due to the decomposition of the light collecting function.

The idea of "decomposing the condensing function" described in the second embodiment is not limited to the vehicle lamp 10 of the first embodiment, and the final emission surface is a hemispherical surface (hemispherical refracting surface). )
It can be applied to any vehicle lighting equipment (for example, the vehicle lighting equipment described in Japanese Patent Application Laid-Open No. 2005-228502 described in the background art). Hereinafter, this point will be described with reference to the third embodiment and the fourth embodiment.

Next, as the third embodiment, the direct projection type vehicle lamp 20 to which the idea of "disassembling the condensing function" described in the second embodiment will be described.
Hereinafter, the same components as those of the vehicle lamp 10A of the second embodiment will be designated by the same reference numerals, and the description thereof will be omitted.

FIG. 28 is a schematic view of a direct projection type vehicle lamp 20 to which the above-mentioned idea of “disassembling the light collecting function” is applied.

As shown in FIG. 28, the direct projection type vehicle lighting tool 20 of the present embodiment includes a light source 14, a shade 22, a first lens unit 12A1 and a second lens unit 12A2, and the light from the light source 14 is the shade 22. After being partially shielded by light, the light is incident on the inside of the first lens unit 12A1 from the first incident surface 12A1b of the first lens unit 12A1 and emitted from the first exit surface 12A1a of the first lens unit 12A1, and further, the second lens. Second incident surface 12A2a of portion 12A2
The second exit surface 12A2b of the second lens portion 12A2 is incident on the inside of the second lens portion 12A2.
A low beam light distribution pattern P1a or the like including the cut-off line CL1 to CL3 defined by the shade 22 at the upper end edge shown in FIG. 20A or the like on the virtual vertical screen by emitting light from the above and irradiating the front. It is configured as a vehicle headlight provided with a lens body configured to form a predetermined light distribution pattern of the present invention).

That is, the direct projection type vehicle lamp 20 of the present embodiment uses a convex lens (a convex lens whose final exit surface is a hemispherical surface) used in a general direct projection type vehicle lamp as a first lens. It corresponds to the one replaced by the part 12A1 and the second lens part 12A2. The focal point F _{12A5 of the} lens 12A5 composed of the first lens portion 12A1 and the second lens portion 12A2 is near the upper end edge of the shade 22 arranged in front of the light source 14 so as to cover a part of the light source 14 (light emitting surface). Is set to. The first incident surface 12A
Unlike the second embodiment, 1b is a plane having a plane shape (or a curved surface shape) orthogonal to the reference axis AX1.

In the vehicle lamp 20 having the above configuration, the light from the light source 14 is partially blocked by the shade 22, and then the first incident surface 12A1b to the first lens portion 12A of the first lens portion 12A1.
It is incident on the inside of 1 and is emitted from the first exit surface 12A1a of the first lens portion 12A1. that time,
The light emitted from the light source 14 emitted from the first exit surface 12A1a is focused in the horizontal direction (not focused or hardly focused in the vertical direction) by the action of the first exit surface 12A1a. Then, the light emitted from the light source 14 emitted from the first exit surface 12A1a passes through the space S, and further enters the inside of the second lens portion 12A2 from the second incident surface 12A2a of the second lens portion 12A2 to the second. It is emitted from the second exit surface 12A2b of the lens unit 12A2 and is irradiated forward. At that time, the light from the light source 14 emitted from the second exit surface 12A2b is the light emitted from the second exit surface 12A.
By the action of 2b, it is focused in the vertical direction (not focused in the horizontal direction or hardly focused). As described above, the low beam light distribution pattern P1a or the like (corresponding to the predetermined light distribution pattern of the present invention) including the cut-off line CL1 to CL3 defined by the shade 22 on the upper end edge shown in FIG. 20A or the like on the virtual vertical screen. ) Is formed.

The shade 22 is omitted from the configuration shown in FIG. 28, and the surfaces 12A1a, 12A1b, 1
By adjusting 2A2a and 12A2b, it is possible to configure a vehicle lighting fixture that forms the high beam light distribution pattern P _Hi shown in FIG. 29 on a virtual vertical screen. In this case, the light from the light source 14 is from the first incident surface 12A1b of the first lens unit 12A1 to the first lens unit 12A.
It is incident on the inside of 1 and is emitted from the first exit surface 12A1a of the first lens portion 12A1. that time,
The light emitted from the light source 14 emitted from the first exit surface 12A1a is focused in the horizontal direction (not focused or hardly focused in the vertical direction) by the action of the first exit surface 12A1a. Then, the light emitted from the light source 14 emitted from the first exit surface 12A1a passes through the space S, and further enters the inside of the second lens portion 12A2 from the second incident surface 12A2a of the second lens portion 12A2 to the second. It is emitted from the second exit surface 12A2b of the lens unit 12A2 and is irradiated forward. At that time, the light from the light source 14 emitted from the second exit surface 12A2b is the light emitted from the second exit surface 12A.
By the action of 2b, it is focused in the vertical direction (not focused in the horizontal direction or hardly focused). As described above, the high beam light distribution pattern P _Hi illustrated in FIG. 29 is formed on the virtual vertical screen. FIG. 29 shows a virtual vertical screen facing the front of the vehicle (
This is an example of the high beam light distribution pattern P _Hi formed on the vehicle (arranged about 25 m ahead of the vehicle front).

Next, as a fourth embodiment, a projector-type vehicle lamp 30 to which the idea of “disassembling the light collecting function” described in the second embodiment will be described. Below, the above second
The same components as those of the vehicle lamp 10A of the embodiment are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 30 is a schematic view of a projector-type vehicle lamp 30 to which the above-mentioned idea of “disassembling the light collecting function” is applied.

As shown in FIG. 30, the projector-type vehicle lamp 30 of the present embodiment includes a light source 14, a reflector 32 (elliptical reflecting surface), a shade 34, a first lens portion 12A1 and a second lens portion 12A2, and is a light source. After the light from 14 is reflected by the reflector 32 and partially shielded by the shade 34, the light from the first incident surface 12A1b of the first lens unit 12A1 to the first lens unit 1
It enters the inside of 2A1 and exits from the first exit surface 12A1a of the first lens portion 12A1, and further enters the inside of the second lens portion 12A2 from the second incident surface 12A2a of the second lens portion 12A2 and enters the second lens portion 12A2. The low beam light distribution pattern P1a and the like (the present invention) including the cut-off line CL1 to CL3 defined by the shade 34 on the upper end edge on the virtual vertical screen by emitting light from the second exit surface 12A2b of the above. It is configured as a vehicle headlight with a lens body configured to form (corresponding to a predetermined light distribution pattern).

That is, the projector-type vehicle lamp 30 of the present embodiment uses the convex lens (convex lens whose final emission surface is a hemispherical surface) used in a general projector-type vehicle lamp, as the first lens unit 12A1. And the one replaced by the second lens unit 12A2. The shade 34 is a lens 12A5 including a first lens portion 12A1 and a second lens portion 12A2.
It is configured as a mirror surface that extends substantially horizontally from the vicinity of the focal point F _12A5 to the rear. The focal point F _{12A5 of the} lens 12A5 including the first lens portion 12A1 and the second lens portion _12A2 is
It is set near the tip edge of the shade 34. Further, the first focal point F1 of the reflector 32 (elliptical reflecting surface) is set in the vicinity of the light source 14, and the second focal point F2 is the focal point F _{12A5 of the} lens 12A5 including the first lens portion 12A1 and the second lens portion 12A2. It is almost the same. In addition, it should be noted
Unlike the second embodiment, the first incident surface 12A1b is a plane having a plane shape (or a curved surface shape) orthogonal to the reference axis AX1.

In the vehicle lamp 30 having the above configuration, the light from the light source 14 is reflected by the reflector 32, partially shielded by the shade 34, and then the first incident surface 12A of the first lens portion 12A1.
The first exit surface 12A of the first lens portion 12A1 is incident on the inside of the first lens portion 12A1 from 1b.
Emit from 1a. At that time, the light from the light source 14 emitted from the first exit surface 12A1a is focused in the horizontal direction (not focused or hardly focused in the vertical direction) due to the action of the first exit surface 12A1a. Then, the light source 14 emitted from the first exit surface 12A1a.
The light from the light passes through the space S, and further, the second incident surface 12A2a of the second lens portion 12A2
The second exit surface 12A2b of the second lens portion 12A2 is incident on the inside of the second lens portion 12A2.
It emits from and is irradiated forward. At that time, the light from the light source 14 emitted from the second exit surface 12A2b is focused in the vertical direction (not or hardly focused in the horizontal direction) due to the action of the second exit surface 12A2b. From the above, on the virtual vertical screen,
Cut-off line CL1 defined by the shade 34 at the upper end edge shown in FIG. 20 (a) and the like.
Light distribution pattern for low beam P1a including CL3 (corresponding to the predetermined light distribution pattern of the present invention)
Is formed.

The shade 34 is omitted from the configuration shown in FIG. 30, and the reflector 32 (elliptical reflecting surface).
By adjusting the above, it is possible to configure a vehicle headlight that forms the high beam light distribution pattern P _Hi shown in FIG. 29 on the virtual vertical screen. In this case, the light from the light source 14 is
It is reflected by the reflector 32, is incident on the inside of the first lens unit 12A1 from the first incident surface 12A1b of the first lens unit 12A1, and is emitted from the first exit surface 12A1a of the first lens unit 12A1. At that time, the light from the light source 14 emitted from the first exit surface 12A1a is the light emitted from the first exit surface 12A1a.
Due to the action of a, it is focused in the horizontal direction (it is not focused in the vertical direction or is hardly focused). Then, the light emitted from the light source 14 emitted from the first exit surface 12A1a passes through the space S, and further enters the inside of the second lens portion 12A2 from the second incident surface 12A2a of the second lens portion 12A2 to the second. It is emitted from the second exit surface 12A2b of the lens unit 12A2 and is irradiated forward. At that time, the light emitted from the light source 14 emitted from the second exit surface 12A2b is focused in the vertical direction (not focused or hardly focused in the horizontal direction) due to the action of the second exit surface 12A2b. As described above, the high beam light distribution pattern P _Hi illustrated in FIG. 29 is formed on the virtual vertical screen.

Next, as a fifth embodiment, the vehicle lamp 10D to which the camber angle is provided will be described with reference to the drawings.

FIG. 31 (a) is a side view (main optical surface only) of the vehicle lamp 10D having a camber angle, FIG. 31 (b) is a top view (main optical surface only), and FIG. 31 (c) is a vehicle lamp. This is an example of a low beam light distribution pattern formed by 10D. 31 (d) to 31 (f) are comparative examples, and FIG. 31 (d) is a side view (main optical surface only) of the vehicle lamp 10A of the second embodiment to which a camber angle is not provided, FIG. 31. (E) is a top view (only the main optical surface), and FIG. 31 (f) is an example of a low beam light distribution pattern formed by the vehicle lamp 10A of the second embodiment. FIG. 32 is a top view (only the main optical surface) for explaining a problem when the camber angle is given.

As shown in FIG. 31B, the vehicle lamp 10D of the present embodiment has the second lens portion 12A2 of the vehicle lamp 10A of the second embodiment with respect to the first reference axis AX1 in a top view. The tilted one, that is, the second exit surface 12A2b of the vehicle lamp 10A of the second embodiment as a semi-cylindrical surface extending in a direction inclined by a predetermined angle with respect to the first reference axis AX1 in top view. It corresponds to the constructed one (that is, the one to which the camber angle θ1 (for example, θ1 = 30 °) is given).

As a result of confirmation by the present inventors by simulation, the distance between the first exit surface 12A1a and the second entrance surface 12A2a is the first reference axis AX1 as shown in FIG. 32 only by adding the camber angle θ1. (See arrows B and C in FIG. 32), and the focal position F _{B of the} light emitted from the B position of the first exit surface 12A1a and the focal position F _{C of the} light emitted from the C position are significantly different from each other. As a result, as shown in FIG. 33, among the low beam light distribution patterns formed on the virtual vertical screen, the side where the distance between the first exit surface 12A1a and the second incident surface 12A2a becomes wider (right side in FIG. 33). ) Was found to be blurred without condensing.

The cause of this blur is as follows when explained with reference to the figure.

FIG. 34 (a) is a cross-sectional view (main optical surface only) at position B shown in FIG. 32, and FIG. 34 (a).
The line with an arrow at the tip in) represents the optical path followed by the light Ray1 _B that is incident at a certain incident angle with respect to the first exit surface 12A1a (position B). 34 (b) is a cross-sectional view (main optical surface only) at the C position shown in FIG. 32, and the line with an arrow at the tip in FIG. 34 (b) is with respect to the first exit surface 12A1a (C position). The light R incident at the same incident angle as shown in FIG. 34 (a).
It represents the optical path followed by ay1 _C. For convenience of explanation, FIGS. 34 (a) and 34 (b).
), The first exit surface 12A1a and the second incident surface 12A2 are in a state where the draft angle is not set.
Although a is drawn, the same applies when a draft angle is set.

As shown in FIG. 34 (b), at position C, the distance between the first exit surface 12A1a and the second incident surface 12A2a is wider than that at position B (see FIG. 34 (a)). Therefore, the incident position of the light Ray 1 _C with respect to the second incident surface 12A2a is lower than the incident position of the light Ray 1 _B with respect to the second incident surface 12A2a shown in FIG. 34 (a), and the light Ray incident from the lower incident position.
1 _C points upward with respect to the horizontal, as shown in FIG. 34 (b). As a result, the above blurring occurs.

As a result of diligent studies to improve this blur, the present inventors improved the blur by adjusting the surface shape of the first exit surface 12A1a, and the low beam light distribution pattern was totally focused. (See FIG. 31 (c)).

Based on this finding, the first exit surface 12A1a of the present embodiment is a semi-cylindrical surface extending in the vertical direction, and the low beam light distribution pattern is totally focused (see FIG. 31 (c)). The surface shape is adjusted so as to. This adjustment shifted focal position F _B, shades F _C etc. 12
This is an adjustment for adjusting to the vicinity of the c position, and is performed using predetermined simulation software. FIG. 35 (a) is a perspective view (main optical surface only) of the vehicle lighting fixture 10D of the fifth embodiment, and FIG. 35 (b) is a comparative example, which is a perspective view (main optical surface) of the vehicle lighting fixture 10A of the second embodiment. Face only). Referring to FIG. 35 (a), the first exit surface 12 of the present embodiment adjusted as described above.
It can be seen that A1a has a shape that is asymmetrical with respect to the reference axis AX1.

The vehicle lamp 10D of the present embodiment is the vehicle lamp 10 of the second embodiment, except for the above points.
It has the same configuration as A.

According to the present embodiment, in addition to the effects of the second embodiment, the following effects can be further achieved.

That is, first, a new-looking lens body (lens coupling body) with a camber angle.
And vehicle lamps using the same can be provided. That is, it is possible to provide a lens body (lens coupling body) having a sense of unity extending in a line shape in a direction inclined by a predetermined angle with respect to the first reference axis AX1 in a top view, and a vehicle lamp using the same. it can. Second, although the second exit surface 12A2b, which is the final emission surface, is a semi-cylindrical surface (semi-cylindrical refracting surface), the light distribution for low beams is focused in the horizontal and vertical directions. It is possible to provide a lens body (lens coupling body) capable of forming a pattern and a vehicle lighting tool using the lens body (lens coupling body).
Thirdly, it is possible to provide a lens body (lens coupling body) in which the low beam light distribution pattern is totally focused even though the camber angle is provided, and a vehicle lamp using the lens body (lens coupling body).

The second exit surface 12A2b, which is the final exit surface, can have a semi-cylindrical surface that extends in a line shape in a direction inclined by a predetermined angle with respect to the first reference axis AX1. This is because it is configured as a semi-cylindrical refracting surface), and the second exit surface 12A2b extends in a direction inclined with respect to the first reference axis AX1 in a top view.

Although the second exit surface 12A2b, which is the final exit surface, is a semi-cylindrical surface (semi-cylindrical refracting surface), it forms a low beam light distribution pattern that is focused in the horizontal and vertical directions. It is possible to mainly focus in the horizontal direction on the first exit surface 12A1 of the first lens unit 12A1.
a (semi-cylindrical refracting surface) is in charge of focusing in the vertical direction, and the second emitting surface 12A2b (semi-cylindrical refracting surface) of the second lens portion 12A2, which is the final emitting surface of the lens body 12A. ) Is in charge. That is, it is due to the decomposition of the light collecting function.

Even though the camber angle is given, the light distribution pattern for low beam generally collects light because the first exit surface 12A1a is a semi-cylindrical surface extending in the vertical direction for low beam. This is because the surface shape of the light distribution pattern is adjusted so as to collect light as a whole.

The idea of "giving a camber angle" and the idea of improving the above-mentioned blurring caused by the addition of the camber angle as described above are described in the present embodiment.
It is not limited to the vehicle lighting equipment 10A (lens body 12A) of the second embodiment, but can also be applied to each modification, the vehicle lighting equipment (lens body) of the third and fourth embodiments, and the like. Similarly, the tenth described later
It can also be applied to the vehicle lamp 10J (lens body 12J) of the embodiment.

Next, as a sixth embodiment, the vehicle lamp 10E to which the slant angle is provided will be described with reference to the drawings.

FIG. 36 is a front view of the vehicle lamp 10E to which the slant angle is provided.

As shown in FIG. 36, the vehicle lamp 10E of the present embodiment has the second lens portion 12A2 of the vehicle lamp 10A of the second embodiment tilted with respect to the horizontal in a front view, that is, the above. The second exit surface 12A2b of the vehicle lamp 10A of the second embodiment is configured as a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the horizontal in a front view (that is, a slant angle θ2 (that is, a slant angle θ2). For example, it corresponds to the one to which θ2 = 12 °) is added. Specifically, the second lens portion 12A2 (second exit surface 12A2b) of the present embodiment centers on the second lens portion 12A2 (second exit surface 12A2b) of the second embodiment with the first reference axis AX1 as the center. Corresponds to the one rotated by a predetermined angle θ2.

As a result of confirmation by the present inventors by simulation, the focused line of the second lens portion 12A2 is tilted with respect to the shade 12c only by applying the slant angle θ2, and as a result, FIGS. 37 (a) and 3
As shown in 7 (b), it was found that the low beam light distribution pattern formed on the virtual vertical screen is in a rotated state (or can be said to be in a blurred state). FIG. 37 (a) is a diagram for explaining a problem appearing in the low beam light distribution pattern when a slant angle is applied, and FIG. 37 (b) is a diagram schematically showing FIG. 37 (a).

As a result of diligent studies in order to suppress this rotation (or a blurred state), the present inventors made the first exit surface 12A1a at a predetermined angle θ2 with respect to the vertical in a front view, as shown in FIG. It is configured as a semi-cylindrical surface extending in an inclined direction, and the reflective surface 12b and the shade 12c are viewed at a predetermined angle in the direction opposite to the second exit surface 12A2b and the first exit surface 12A1a with respect to the horizontal. The rotation is suppressed by arranging it in an inclined posture of θ2 (FIGS. 38 (a) and 38.
(See (b)) was found. FIG. 38 (a) is a diagram for explaining that the problem (rotation) appearing in the low beam light distribution pattern is suppressed, and FIG. 38 (b) is a diagram schematically showing FIG. 38 (a). ..

The reason why the rotation (or the blurred state) is suppressed is as follows when explained with reference to the figure.

52 (a) is a side view (only the main optical surface omitting the first exit surface 12A1a) of the vehicle lamp 10E (lens body 12A) of the present embodiment, and FIG. 52 (b) is a top view (first exit surface). 12A1
(Only the main optical surface omitting a), all of which are from the second exit surface 12A2b to the lens body 12A.
It represents the optical path (that is, the result of back ray tracing) followed by the parallel ray RayAA incident inside.

52 (d) is a side view (only the main optical surface omitting the first exit surface 12A1a) of the vehicle lamp 10E (lens body 12A) of the present embodiment, and FIG. 52 (e) is a top view (first exit surface). 12A1
(Only the main optical surface omitting a), all of which are from the second exit surface 12A2b to the lens body 12A.
It represents the optical path (that is, the result of back ray tracing) followed by the parallel ray RayBB incident inside.

In FIGS. 52 (a) to 52 (d), the slant angle θ2 (=) is attached to the second lens portion 12A2.
10 °) is given, and the focused line of the second lens portion 12A2 is also a slant angle θ2 with respect to the horizontal.
It is tilted for a minute. As a result, the focal point F _BB in FIG. 52 (c) becomes the focal point F _AA in FIG. 52 (a).
It is located higher.

Next, when the optical paths followed by the parallel rays RayAA and RayBB when the first exit surface 12A1a is arranged are examined, the optical paths are as shown in FIGS. 53 (a) and 53 (b).

FIG. 53 (a) is a top view in which the first emission surface 12A1a is added to FIG. 52 (b), and is an optical path (that is, the result of back ray tracking) followed by the parallel ray RayAA incident on the inside of the lens body 12A from the second emission surface 12A2b. ). FIG. 53 (b) shows the first exit surface 12A1 in FIG. 52 (d).
In the top view with a added, the optical path (that is, the result of back light tracking) followed by the parallel light ray RayBB incident on the inside of the lens body 12A from the second exit surface 12A2b is shown.

When the first exit surface 12A1a is provided with a slant angle θ2 (= 10 °) (that is, the first exit surface 12A1a is configured as a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the vertical direction. Indication if), components having a low focal F _AA (i.e., RayAA), as shown in FIG. 53 (a), proceeds to the opposite side is refracted by the action of the first output surface 12A1a, focused. Meanwhile, components with high focus F _BB (i.e., RayBB), as shown in FIG. 53 (b), and proceeds to the opposite side is refracted by the action of the first output surface 12A1a, focused. As a result, the focused line is tilted in the direction opposite to the slant direction.

Therefore, in order to match (substantially match) the shade 12c with the focused line inclined in the direction opposite to the slant direction, the reflecting surface 12b and the shade 12c are viewed from the front and the second exit surface 12A with respect to the horizontal.
It is arranged in a posture inclined by a predetermined angle θ2 in the direction opposite to 2b and the first exit surface 12A1a. As a result, the shade 12c coincides with (substantially coincides with) the focused line inclined in the direction opposite to the slant direction, and the rotation (or the blurred state) is suppressed.

Based on the above findings, the first exit surface 12A1a of the present embodiment is configured as a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the vertical in front view. Specifically, the first exit surface 12A1a of the present embodiment rotates the first exit surface 12A1a of the second embodiment by a predetermined angle θ2 in the same direction as the second exit surface 12A2b about the first reference axis AX1. Corresponds to the one.

Further, the reflective surface 12b and the shade 12c are the second exit surface 12A with respect to the horizontal when viewed from the front.
It is arranged in a posture inclined by a predetermined angle θ2 in the direction opposite to that of 2b and the first exit surface 12A1a.
Specifically, the reflective surface 12b and the shade 12c of the present embodiment are the reflective surface 1 of the second embodiment.
It corresponds to a 2b and a shade 12c rotated by a predetermined angle θ2 in the direction opposite to the second exit surface 12A2b and the first exit surface 12A1a about the first reference axis AX1.

The vehicle lamp 10E of the present embodiment is the vehicle lamp 10 of the second embodiment, except for the above points.
It has the same configuration as A.

According to the present embodiment, in addition to the effects of the second embodiment, the following effects can be further achieved.

That is, firstly, it is possible to provide a newly-looking lens body (lens coupling body) to which a slant angle is imparted and a vehicle lamp using the lens body (lens coupling body). That is, it is possible to provide a lens body (lens coupling body) having a sense of unity extending in a line shape in a direction inclined by a predetermined angle with respect to the horizontal in a front view, and a vehicle lamp using the same. Second, although the second exit surface 12A2b, which is the final emission surface, is a semi-cylindrical surface (semi-cylindrical refracting surface), the light distribution for low beams is focused in the horizontal and vertical directions. It is possible to provide a lens body (lens coupling body) capable of forming a pattern and a vehicle lighting tool using the lens body (lens coupling body). Thirdly, it is possible to provide a lens body (lens coupling body) in which rotation of the low beam light distribution pattern is suppressed even though a slant angle is provided, and a vehicle lamp using the lens body (lens coupling body).

The second exit surface 12A2b, which is the final exit surface, can have a semi-cylindrical surface (semi-cylindrical) that extends in a line in a direction inclined by a predetermined angle with respect to the horizontal. This is because it is configured as a refracting surface), and the second exit surface 12A2b extends in a direction inclined with respect to the horizontal in a front view.

Although the second exit surface 12A2b, which is the final exit surface, is a semi-cylindrical surface (semi-cylindrical refracting surface), it forms a low beam light distribution pattern that is focused in the horizontal and vertical directions. It is possible to mainly focus in the horizontal direction on the first exit surface 12A1 of the first lens unit 12A1.
a (semi-cylindrical refracting surface) is in charge of focusing in the vertical direction, and the second emitting surface 12A2b (semi-cylindrical refracting surface) of the second lens portion 12A2, which is the final emitting surface of the lens body 12A. ) Is in charge. That is, it is due to the decomposition of the light collecting function.

Despite the slant angle, the rotation of the low beam light distribution pattern is suppressed by the semicircle of the first exit surface 12A1a extending in a direction inclined by a predetermined angle with respect to the vertical in front view. It is a columnar surface, and the shade 12c (and the reflective surface 12b) is viewed from the front.
This is because they are arranged in a posture inclined by a predetermined angle in the direction opposite to the second exit surface 12A2b and the first exit surface 12A1a with respect to the horizontal.

The idea of "giving a slant angle" described in the present embodiment and the idea of suppressing the rotation generated by the addition of the slant angle as described above are the second.
It is not limited to the vehicle lighting equipment 10A (lens body 12A) of the embodiment, but can also be applied to each modification, the vehicle lighting equipment (lens body) of the third and fourth embodiments, and the like. Similarly, it can be applied to the vehicle lamp 10J (lens body 12J) of the tenth embodiment described later.

Next, as a seventh embodiment, a vehicle lamp 10 to which a camber angle and a slant angle are provided.
F will be described with reference to the drawings.

FIG. 39A is a side view of the vehicle lamp 10F to which the camber angle and the slant angle are provided (
(Main optical surface only), FIG. 39 (b) is a top view (main optical surface only), and FIG. 39 (c) is an example of a low beam light distribution pattern formed by a vehicle lamp 10F.

As shown in FIGS. 39 (a) and 39 (b), the vehicle lighting fixture 10F of the present embodiment is a first view of the second lens portion 12A2 of the vehicle lighting fixture 10A of the second embodiment. Reference axis AX
1 tilted (that is, given a camber angle θ1) and tilted with respect to horizontal (that is, given a slant angle θ2) in front view, that is, the fifth embodiment and the above-mentioned first. 6 Corresponds to a combination with the embodiment.

That is, the second exit surface 12A2b of the present embodiment extends in a direction inclined by a predetermined angle with respect to the first reference axis AX1 in a top view as in the fifth embodiment, and is the same as in the sixth embodiment. , It is configured as a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the horizontal when viewed from the front.

The first exit surface 12A1a of the present embodiment has a predetermined angle θ2 with respect to the vertical when viewed from the front.
It is a semi-cylindrical surface extending in an inclined direction (see FIG. 36), and its surface shape is adjusted so that the low beam light distribution pattern is totally focused.

Further, the reflective surface 12b and the shade 12c of the present embodiment are the same as those of the sixth embodiment.
When viewed from the front, they are arranged so as to be inclined at a predetermined angle θ2 in the direction opposite to the second exit surface 12A2b and the first exit surface 12A1a with respect to the horizontal.

According to the present embodiment, it is possible to provide a newly-looking lens body (lens coupling body) to which a camber angle and a slant angle are imparted, and a vehicle lamp using the same, and the fifth embodiment and the sixth embodiment described above. The same effect as that of the embodiment can be obtained.

The concept of "giving a camber angle and a slant angle" described in the present embodiment, and the blurring and rotation caused by the addition of the camber angle and the slant angle are improved and suppressed as described above. The idea is not limited to the vehicle lighting equipment 10A (lens body 12A) of the second embodiment, but each modification, the vehicle lighting equipment (lens body) of the third and fourth embodiments.
It can also be applied to. Similarly, it can be applied to the vehicle lamp 10J (lens body 12J) of the tenth embodiment described later.

Next, the vehicle lamp 10G of the first comparative example will be described with reference to the drawings.

FIG. 40A is a side view (main optical surface only) of the vehicle lamp 10G of the first comparative example, FIG. 40 (a).
b) is a top view (main optical surface only), and FIG. 40 (c) is an example of a light distribution pattern formed by the vehicle lamp 10G.

As shown in FIGS. 40 (a) and 40 (b), the vehicle lamp 10G of this comparative example has the above-mentioned fifth
This corresponds to a second lens portion 12A2 of the vehicle lighting fixture 10D of the embodiment tilted with respect to the horizontal (that is, a slant angle θ2 is provided) in a front view.

That is, the first exit surface 12A1a of this comparative example is configured as a semi-cylindrical surface extending in the vertical direction in the front view as in the fifth embodiment. That is, the first exit surface 12A of this comparative example.
Unlike the sixth embodiment, 1a is not configured as a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the vertical in a front view.

Further, the reflecting surface 12b and the shade 12c of this comparative example are arranged in a horizontal posture in a front view as in the fifth embodiment. That is, the first exit surface 12A1a of this comparative example is the sixth
Unlike the embodiment, the second exit surface 12A2b and the first exit surface 12 with respect to the horizontal in front view.
It is not arranged in a posture tilted by a predetermined angle θ2 in the direction opposite to A1a.

As shown in FIG. 40 (c), the light distribution pattern formed by the vehicle lamp 10G of this comparative example greatly protrudes upward from the horizon, and it can be seen that the light distribution pattern is not suitable as a low beam light distribution pattern.

Next, the vehicle lamp 10H of the second comparative example will be described with reference to the drawings.

FIG. 41 (a) is a side view (main optical surface only) of the vehicle lamp 10H of the second comparative example, FIG. 41 (
b) is a top view (main optical surface only), and FIG. 41 (c) is an example of a light distribution pattern formed by the vehicle lamp 10H.

As shown in FIGS. 41 (a) and 41 (b), the vehicle lamp 10H of this comparative example is the first
The first exit surface 12A1a of the vehicle lamp 10G of the comparative example is viewed from the front as in the sixth embodiment.
It corresponds to a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the vertical.

That is, the first exit surface 12A1a of this comparative example is configured as a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the vertical in front view, as in the sixth embodiment.

Further, the reflecting surface 12b and the shade 12c of this comparative example are arranged in a horizontal posture in a front view as in the fifth embodiment. That is, the first exit surface 12A1a of this comparative example is the sixth
Unlike the embodiment, the second exit surface 12A2b and the first exit surface 12 with respect to the horizontal in front view.
It is not arranged in a posture tilted by a predetermined angle θ2 in the direction opposite to A1a.

As shown in FIG. 41 (c), the light distribution pattern formed by the vehicle lighting fixture 10H of the present comparative example greatly protrudes upward from the horizon, and it can be seen that the light distribution pattern is not suitable as a low beam light distribution pattern.

Next, as an eighth embodiment, a problem when the camber angle θ1 is increased and a method for solving the problem will be described.

FIG. 42A shows the vehicle lamp 10 of the fifth embodiment when the camber angle θ1 is 30 °.
An example of a low beam light distribution pattern formed by D (the same applies to the vehicle lamp 10F of the seventh embodiment), FIG. 42 (b) shows the vehicle of the fifth embodiment when the camber angle θ1 is 45 °. This is an example of a low beam light distribution pattern formed by the lamp 10D (the same applies to the vehicle lamp 10F of the seventh embodiment). The hatched region in FIG. 42 (b) indicates that the region is brighter than the similar region in FIG. 42 (a).

As a result of confirmation by the present inventors by simulation, the vehicle lamp 10D of the fifth embodiment (
It was found that when the camber angle θ1 was increased (for example, θ1 = 45 °) in the vehicle lamp 10F of the seventh embodiment, the area above the cut-off line became brighter as shown in FIG. 42 (b).

The cause of this is as follows when explained with reference to the figure.

FIG. 43 is a cross-sectional view (main optical surface only) of the vehicle lamp 10D of the fifth embodiment. FIG. 43
The line with an arrow at the tip of the inside represents the optical path followed by the light Ray2 from the light source 14 that is incident at a certain incident angle with respect to the first exit surface 12A1a.

When the camber angle θ1 is increased (for example, θ1 = 45 °) in the vehicle lighting equipment 10D of the fifth embodiment (the same applies to the vehicle lighting equipment 10F of the seventh embodiment), the camber angle θ1 is small (for example, θ1 = 30 °). ), As shown in FIG. 43, the distance between the first exit surface 12A1a and the second incident surface 12A2a is wider. Therefore, the second incident surface 12A of the optical Ray 2
The incident position with respect to 2a is lower than when the camber angle θ1 is small (for example, θ1 = 30 °), and the light Ray2 incident from the lower incident position is obliquely upward with respect to the horizontal as shown in FIG. 43. It becomes a traveling light. As a result, glare occurs and the cut-off line becomes unclear.

Even if the extraction angles α and β set on the first exit surface 12A1a and the second incident surface 12A2a are increased, the light Ray2 becomes light that travels diagonally upward with respect to the horizontal due to the same cause as described above. It turns out.

Next, a method for solving the above problems will be described.

As a result of diligent studies to improve the above problems, the present inventors have found that the light Ray2 heading upward with respect to the horizontal is emitted from a part of the lower region of the second exit surface 12A2b. Light R that physically cuts this partial region or emits from the partial region
The idea is that the above problem can be improved by adjusting the surface shape (for example, curvature) of a part of the region so that ay2 is parallel to or downward in light with respect to the first reference axis AX. Obtained.

FIG. 44A shows a partial region 12 below the second exit surface 12A2b based on the above findings.
This is an example in which A2b2 is physically cut to leave the upper region 12A2b1. in this way,
By cutting a part of the area where the light that originally goes diagonally upward with respect to the horizontal is emitted, the light that travels diagonally upward can be suppressed. As a result, the occurrence of glare can be suppressed and the cut-off line can be made clear.

FIG. 44 (b) shows a part of the lower region 12 of the second exit surface 12A2b based on the above findings.
The surface shape (for example, curvature) of a part of the region 12A2b2 is adjusted so that the light Ray2 emitted from the A2b2 is parallel or downward with respect to the first reference axis AX, and the second exit surface 12A2
This is an example in which b is divided into an upper region 12A2b1 and a lower region 12A2b2. In this way, by adjusting a part of the region where the light originally emitted upward with respect to the horizontal is emitted as described above, it is possible to suppress the light traveling diagonally upward. As a result, the occurrence of glare can be suppressed and the cut-off line can be made clear.

The present inventors have confirmed by simulation that any of the above methods can suppress the above-mentioned problem, that is, brightening above the cut-off line.

Next, as a ninth embodiment, the vehicle lamp 10I in which the second reference axis AX2 is tilted with respect to the first reference axis AX1 in a top view will be described with reference to the drawings.

FIG. 45 is a top view (main optical surface only) of the vehicle lamp 10I in which the second reference axis AX2 is tilted with respect to the first reference axis AX1 in a top view.

As shown in FIG. 45, the vehicle lamp 10I of the present embodiment shades the second reference axis AX2 of the vehicle lamp 10D of the fifth embodiment (or the vehicle lamp 10F of the seventh embodiment). It corresponds to the one tilted with respect to the first reference axis AX1 in top view by rotating the 12c by a predetermined angle with the substantially center in the left-right direction as the rotation center.

According to the present embodiment, in addition to the effect of the fifth embodiment, Fresnel reflection loss (particularly, as shown in FIG. 45, Fresnel reflection loss with respect to the second exit surface 12A2b to which a camber angle is provided) is suppressed. As a result, the effect of improving the light utilization efficiency can be achieved.

The idea of "tilting the second reference axis AX2 with respect to the first reference axis AX1 in a top view" described in the present embodiment is based on the vehicle lamp 10A (lens body 12A) of the fifth embodiment.
The present invention is not limited to the above, and can be applied to each of the modified examples, the vehicle lamp (lens body) of the first to fourth and sixth to eighth embodiments. Similarly, it can be applied to the vehicle lamp 10J (lens body 12J) of the tenth embodiment described later.

Next, the vehicle lamp 10J (lens body 12J) of the tenth embodiment will be described with reference to the drawings.

The vehicle lamp 10J (lens body 12J) of the present embodiment is configured as follows.

FIG. 46 is a perspective view of a vehicle lamp 10J (lens body 12J), FIG. 47 (a) is a top view, and FIG.
7 (b) is a front view, and FIG. 47 (c) is a side view. FIG. 48 (a) is an example of a low beam light distribution pattern _PLO (composite light distribution pattern) formed by a vehicle lamp 10J (lens body 12J), and each part shown in FIGS. 48 (b) to 48 (d). It is formed by superimposing the distributed light patterns P _SPOT , P _MID , and P _WIDE .

The lens body 12J of the present embodiment has a spot light distribution pattern P _SPOT (see FIG. 48 (b)).
In addition to the first optical system (see FIG. 49 (a)) similar to the lens body 12A of the second embodiment, the light distribution pattern P _MI for the mid is further diffused from the light distribution pattern P _SPOT for the spot.
The second optical system (see FIG. 49 (b)) forming _D (see FIG. 48 (c)) and the wide light distribution pattern P _WIDE diffused from the mid light distribution pattern P _MID (FIG. 48d (d)). It includes a third optical system (see FIG. 49 (c)) that forms (see).

Hereinafter, the differences from the vehicle lighting fixture 10A (lens body 12A) of the second embodiment will be mainly described, and the same configuration as that of the vehicle lighting fixture 10A (lens body 12A) of the second embodiment will be the same. A reference numeral is added and the description thereof will be omitted.

As shown in FIGS. 46 and 47, the lens body 12J of the present embodiment has the same configuration as the lens body 12A of the second embodiment, and has a first rear end portion 12A1aa, a front end portion 12A1bb, and a first rear end portion 1.
A pair of left and right side surfaces 44a, 44b arranged between 2A1aa and the first front end portion 12A1bb.
, And the first lens portion 12A1 including the lower reflection surface 12b arranged between the first rear end portion 12A1aa and the first front end portion 12A1bb, and the second rear end arranged in front of the first lens portion 12A1. A second lens portion 12A2 including a portion 12A2aa and a second front end portion 12A2bb, a connecting portion 12A3 connecting the first lens portion 12A1 and the second lens portion 12A2, and a first rear end of the first lens portion 12A1. It is configured as a lens body including an upper surface 44c arranged between the portion 12A1aa and the first front end portion 12A1bb.

The lens body 12J of the present embodiment is integrally molded (by injection molding) by injecting a transparent resin such as polycarbonate or acrylic, cooling and solidifying, as in each of the above-described embodiments.

FIG. 50 (a) is a front view of the first rear end portion 12A1aa of the first lens portion 12A1, and FIG. 50 (b).
) Is a sectional view taken along the line AA (schematic view) of FIG. 50 (a), and FIG. 50 (c) is a sectional view taken along the line BB (schematic view) of FIG. 50 (a).

As shown in FIGS. 50 (a) and 50 (b), the first rear end portion 12A of the first lens portion 12A1.
1aa is a first incident surface 12a and a first incident surface 12a on both the left and right sides of the first incident surface 12a.
It includes a pair of left and right incident surfaces 42a and 42b arranged so as to surround the space between the light source 14 arranged in the vicinity and the first incident surface 12a from both the left and right sides. As shown in FIGS. 50 (a) and 50 (c), the first rear end portion 12A1aa further increases the space between the light source 14 and the first incident surface 12a above the first incident surface 12a. Upper incident surface 42 arranged so as to surround from
c is included.

The tip of the lower reflective surface 12b includes a shade 12c.

As shown in FIG. 46, the first front end portion 12A1bb of the first lens portion 12A1 has a semi-cylindrical first exit surface 12A1a extending in the vertical direction and a pair of left and right sides arranged on the left and right sides of the first exit surface 12A1a. The exit surfaces 46a and 46b of the above are included.

The second rear end portion 12A2aa of the second lens portion 12A2 includes the second incident surface 12A2a, and the second front end portion 12A2bb of the second lens portion 12A2 includes the second exit surface 12A2b.

The second exit surface 12A2b includes a semi-cylindrical region 12A2b3 extending in the horizontal direction and an extension region 12A2b4 extending diagonally upward and backward from the upper edge of the semi-cylindrical region 12A2b3.
Includes.

The connecting portion 12A3 connects the first lens portion 12A1 and the second lens portion 12A2 to the first front end portion 12A1bb of the first lens portion 12A1 and the second rear end portion 12A2aa of the second lens portion 12A2 at the upper portions thereof. The space S surrounded by the portions 12A3 is connected in a formed state.

FIG. 49A is a side view (only the main optical surface) of the first optical system.

As shown in FIG. 49 (a), the first incident surface 12a, the lower reflecting surface 12b (and the shade 12c).
), The first exit surface 12A1a, the second incident surface 12A2a, and the second exit surface 12A2b (semi-cylindrical region 12A2b3) are from the light source 14 incident on the inside of the first lens portion 12A1 from the first incident surface 12a. Light that is partially blocked by the shade 12c of the light Ray _SPOT , and
The light internally reflected by the lower reflecting surface 12b is emitted from the first emitting surface 12A1a, and further, the second
It is incident on the inside of the second lens portion 12A2 from the incident surface 12A2a, exits from a part of the second exit surface 12A2b (semi-cylindrical region 12A2b3), and is irradiated forward from the region A1 (see FIG. 47B). As a result, as shown in FIG. 48 (b), the first light distribution pattern P _SPOT for spots (corresponding to the first light distribution pattern of the present invention) including the cut-off line defined by the shade 12c is formed on the upper end edge. It constitutes an optical system.

FIG. 49B is a top view (only the main optical surface) of the second optical system.

As shown in FIG. 49 (b), a pair of left and right incident surfaces 42a and 42b and a pair of left and right side surfaces 44a.
, 44b, a pair of left and right incident surfaces 46a, 46b, a second incident surface 12A2a, and a second exit surface 12A2b (semi-cylindrical region 12A2b3) are formed from the pair of left and right incident surfaces 42a, 42b to the inside of the first lens portion 12A1. The light Ray _MID from the light source 14 incident on the left and right side surfaces 44a and 44b and reflected on the inner surface is emitted from the pair of left and right exit surfaces 46a and 46b, and further, the second
The incident surface 12A2a is incident on the inside of the second lens portion 12A2 and is mainly incident on the second exit surface 12A2b (
Of the semi-cylindrical regions 12A2b3), regions A2 and A3 on both the left and right sides of a part of the region A1 (FIG. 47).
As shown in FIG. 48 (c), the _mids diffused from the spot light distribution pattern P _SPOT are superimposed on the spot light distribution pattern P _SPOT by emitting from (see (b)) and being irradiated forward. It constitutes a second optical system that forms the light distribution pattern P _MID .

The pair of left and right incident surfaces 42a and 42b are the light from the light source 14 that is not incident on the first incident surface 12a (mainly the light Ray _MID spreading in the left-right direction. See FIG. 50 (b)). As shown in FIG. 50B, the surface incident on the inside of the lens portion 12A1 is configured as a curved surface (for example, a free curved surface) that is convex toward the light source 14.

As shown in FIG. 47 (a), the pair of left and right side surfaces 44a and 44b are a pair of left and right side surfaces in a top view from the first front end portion 12A1bb side of the first lens portion 12A1 toward the first rear end portion 12A1aa side. It is configured as a curved surface (for example, a free curved surface) that is convex toward the outside in which the distance between 44a and 44b is narrowed in a tapered shape. In addition, a pair of left and right side surfaces 44a, 44
As shown in FIG. 47 (c), b is a first front end portion 12A of the first lens portion 12A1 in a side view.
It is configured as a surface having a shape in which the upper edge and the lower edge are tapered in a taper shape from the 1bb side toward the first rear end portion 12A1aa side.

The pair of left and right side surfaces 44a and 44b are formed by pairing the left and right light ray _MIDs from the light source 14 incident on the inside of the first lens portion 12A1 from the pair of left and right incident surfaces 42a and 42b.
It is a reflective surface that reflects internally (total internal reflection) toward 46b, and does not use metal vapor deposition.

The pair of left and right exit surfaces 46a and 46b are configured as planar surfaces. of course,
Not limited to this, it may be configured as a curved surface.

The second optical system having the above configuration forms the mid light distribution pattern P _MID shown in FIG. 48 (c) on the virtual vertical screen.

The vertical dimension of the light distribution pattern P _MID for the mid is about 10 degrees in FIG. 48 (c).
Not limited to this, for example, it can be freely adjusted by adjusting the surface shapes (for example, the curvature in the vertical direction) of the pair of left and right incident surfaces 42a and 42b.

The position of the upper end edge of the mid light distribution pattern P _MID is slightly below the horizontal line in FIG. 48 (c), but is not limited to this, and the surface shapes of the pair of left and right incident surfaces 42a and 42b (for example, left and right). It can be freely adjusted by adjusting the inclination of the pair of incident surfaces 42a and 42b).

Further, the right end and the left end of the mid light distribution pattern P _MID extend to about 30 degrees to the right and about 30 degrees to the left in FIG. 48 (c), but are not limited to this, for example, a pair of left and right incident surfaces 42a. 42
It can be freely adjusted by adjusting b and / or a pair of left and right side surfaces 44a and 44b (for example, the respective horizontal curvatures).

FIG. 49 (c) is a side view (only the main optical surface) of the third optical system.

As shown in FIG. 49 (c), the upper incident surface 42c, the upper surface 44c, the connecting portion 12A3, and the second exit surface 12A2b (extension region 12A2b4) are formed from the upper incident surface 42c to the first lens portion 12.
A light source 14 that is incident on the inside of A1 and is internally reflected by the upper surface 44c and travels inside the connecting portion 12A3.
The light Ray _WIDE from is emitted from the second exit surface 12A2b (region A4 above each region A1 to A3, that is, extension region 12A2b4) and is irradiated forward, whereby FIG. 48 (d)
As shown in), is superimposed on the light distribution pattern P _SPOT and mid light distribution pattern P _MID spot, third optical system for forming a wide light distribution pattern P _WIDE diffused from mid light distribution pattern P _MID Consists of.

The upper incident surface 42c is light from the light source 14 that is not incident on the first incident surface 12a (mainly, light).
Light Ray _WIDE spreading upward. (See FIG. 50 (c)) is a surface that is refracted and incident on the inside of the first lens portion 12A1, and as shown in FIG. 50 (c), a curved surface (for example, a free curved surface) that is convex toward the light source 14. It is configured as.

As shown in FIGS. 46 and 49 (c), the upper surface 44c is the first lens portion 12A1 in a side view.
It is configured as a curved surface shaped surface that is inclined outward from the first front end portion 12A1bb side toward the first rear end portion 12A1aa side. The upper surface 44c is shown in FIG. 47 (
As shown in a), the left edge and the right edge of the first lens portion 12A1 are formed as a surface having a tapered shape toward the first rear end portion 12A1aa side from the first front end portion 12A1bb side in the top view. Has been done. Specifically, on the upper surface 44c, the light Ray _WIDE from the light source 14 (to be exact, the reference point F) incident on the inside of the first lens portion 12A1 from the upper incident surface 42c becomes parallel light in the vertical direction. The surface shape is configured in. Further, the upper surface 44c extends in a direction orthogonal to the paper surface in FIG. 49 (c) with respect to the horizontal direction.

The upper surface 44c is a light source 1 incident on the inside of the first lens portion 12A1 from the upper incident surface 42c.
It is a reflecting surface that reflects the light Ray _WIDE from No. 4 toward the second exit surface 12A2b (extended region 12A2b4) on the inner surface (total reflection), and does not use metal vapor deposition.

The extension region 12A2b4 is configured as a planar surface extending diagonally upward and backward from the upper edge of the second exit surface 12A2b (semi-cylindrical region 12A2b3). Of course, the present invention is not limited to this, and the surface may be configured as a curved surface. The semi-cylindrical region 12A2b3
And the extension region 12A2b4 are smoothly connected without a step.

Top 44c, as shown in FIG. 49 (c), includes a reflecting surface for overhead sign 44c1 for forming a light distribution pattern P _OH for overhead sign irradiating the cutoff line above the road signs and the like. The reflection surface 44c1 for the overhead sign is the upper incident surface 42.
The light RayOH from the light source 14 that is incident on the inside of the first lens portion 12A1 from c, is reflected by the reflection surface 44c1 for overhead sign, and travels inside the connecting portion 12A3 is emitted from the second exit surface 12A.
By emitting from 2b (extension region 12A2b4) and irradiating diagonally forward and upward, FIG. 4
As shown in 8 (d), the light distribution pattern P for the overhead sign is above the cut-off line.
Its surface shape is configured to form _OH . The overhead sign reflective surface 44c1 can be omitted as appropriate.

In addition, as the third optical system, instead of the above, the upper incident surface 42c, the connecting portion 12A3, and
The light Ray _WIDE from the light source 14 that includes the second exit surface 12A2b (extension region 12A2b4) and is incident on the inside of the first lens portion 12A1 from the upper incident surface 42c travels inside the connecting portion 12A3 without being internally reflected. 2 As shown in FIG. 48 (d), the wide light distribution pattern P _{WI is} emitted directly from the exit surface 12A2b (extended region 12A2b4) and irradiated forward.
An optical system that forms _DE may be used.

With the third optical system having the above configuration, the wide light distribution pattern P _WIDE and the overhead sign light distribution pattern P _{OH shown} in FIG. _48D are formed on the virtual vertical screen.

The vertical dimension of the wide light distribution pattern P _WIDE is about 15 degrees in FIG. 48 (d).
Not limited to this, for example, it can be freely adjusted by adjusting the surface shape (for example, the curvature in the vertical direction) of the upper incident surface 42c.

Further, the position of the upper end edge of the wide light distribution pattern P _WIDE is along the horizontal line in FIG. 48 (d), but is not limited to this, and can be freely adjusted by adjusting the inclination of the upper surface 44c. ..

In the present embodiment, as shown in FIG. 46, the upper surface 44c includes an upper left surface 44c2 and a right upper surface 44c3 partitioned left and right by a vertical plane including a reference axis AX1, and each of the upper left surface 44c2 and the right upper surface 44c3. The slopes are different from each other. Specifically, the upper left surface 44c2
Is tilted below the upper right surface 44c3. As a result, as shown in FIG. 48 (d), the wide light distribution pattern P _WIDE includes a cut-off line at the upper end edge, in which the upper left edge is lower than the upper right edge with respect to the vertical line. Can be (in the case of right-hand traffic). Of course, on the contrary, the upper left surface 44c2 may be tilted above the right upper surface 44c3. As a result, the wide light distribution pattern P _WIDE can include a cut-off line in which the upper left edge on the left side of the vertical line is higher than the upper edge on the right side (in the case of left-hand traffic).

Further, the right end and the left end of the wide light distribution pattern P _WIDE extend to about 65 degrees to the right and about 65 degrees to the left in FIG. 48 (d), but the present invention is not limited to this, and for example, the upper incident surface 42c (for example, It can be freely adjusted by adjusting the curvature in the horizontal direction).

According to the present embodiment, in addition to the effects of the second embodiment, the following effects can be further achieved.

That is, first, it is possible to provide a lens body 12J capable of maintaining a line-shaped light emitting appearance even when the viewpoint position is changed, and a vehicle lamp 10J provided with the lens body 12J. Second,
It is possible to provide a lens body 12J capable of achieving uniform light emission (or substantially uniform light emission) appearance and a vehicle lamp 10J provided with the lens body 12J. Thirdly, the efficiency of taking in the light from the light source 14 into the lens body 12J is dramatically improved. Fourth, it is possible to provide a lens body 12J having a sense of unity extending in a line shape in a predetermined direction and a vehicle lamp 10J provided with the lens body 12J. Fifth, the second exit surface 12A2b, which is the final exit surface, is a semi-cylindrical surface 12A2b.
3 (semi-cylindrical refracting surface), a lens body 12J capable of forming a spot light distribution pattern P _SPOT focused in the horizontal and vertical directions, and a vehicle lamp 10J equipped with the lens body 12J. Can be provided.

Even if the viewpoint position is changed, the line-shaped light emission appearance can be maintained because one lens body 12J has a plurality of light distribution patterns having different degrees of diffusion, that is, a spot light distribution pattern P _SPOT (the present invention). Light distribution pattern P _MID for mid (corresponding to the second light distribution pattern of the present invention) and light distribution pattern P _WIDE for wide (corresponding to the third light distribution pattern of the present invention) A plurality of optical systems to be formed, that is, a first optical system (see FIG. 49 (a)), a second
This is due to the provision of an optical system (see FIG. 49 (b)) and a third optical system (see FIG. 49 (c)). In order to achieve this effect, at a minimum, the first optical system (see FIG. 49 (a)).
And a second optical system (see FIG. 49 (b)) may be provided, and the third optical system (see FIG. 49 (c)) may be omitted as appropriate.

It is possible to realize the appearance of uniform light emission (or substantially uniform light emission) from each incident surface, that is, the first incident surface 12a, the pair of left and right incident surfaces 42a and 42b, and the upper incident surface 42c to the first lens portion. As a result of the light from the light source 14 incident on the inside of 12A1 being reflected by each reflecting surface, that is, the lower reflecting surface 12b, the pair of left and right side surfaces 44a and 44b, and the upper surface 44c, the lens body 1
In addition to emitting multiple points inside 2J (see FIG. 51), the reflected light from each reflecting surface, that is, the lower reflecting surface 12b, the pair of left and right side surfaces 44a and 44b, and the upper surface 44c is emitted on the final emitting surface. Emitting uniformly from almost the entire area of a second exit surface 12A2b, that is, the lower reflection surface 1
Second exit surface 12A2b (semi-cylindrical region 12A) where the reflected light from 2b is the final exit surface
2b3), a part of the area A1 (see FIG. 47B), and a pair of left and right side surfaces 44a.
The reflected light from 44b is mainly the final emission surface of the second emission surface 12A2b (semi-cylindrical region 12A2b3), and the regions A2 and A3 on both the left and right sides of a part of the region A1 (see FIG. 47 (b)). )
The light reflected from the upper surface 44c is mainly the final exit surface, the second exit surface 12A2.
This is due to the emission from b (region A4 above each region A1 to A3, that is, extension region 12A2b4). In order to achieve this effect, at least the first optical system (Fig. 49 (Fig. 49)
It suffices to have a second optical system (see FIG. 49 (b)) and a third optical system (see FIG. 4).
9 (c)) can be omitted as appropriate.

The efficiency of taking the light from the light source 14 into the lens body 12J is dramatically improved because each incident surface, that is, the first incident surface 12a, the pair of left and right incident surfaces 42a and 42b, and the upper incident surface 42c are the light sources. It is arranged so as to surround 14 (see FIGS. 50 (a) to 50 (c)).
It is due to that. In order to achieve this effect, at least the first incident surface 12a and a pair of left and right incident surfaces 42a and 42b need be provided, and the upper incident surface 42c can be omitted as appropriate.

The vehicle lamp 10J (lens body 12J) of the present embodiment is based on the above concept of the first exit surface 1.
It corresponds to, but is not limited to, the one applied to the vehicle lamp 10A of the second embodiment including the 2A1a and the second exit surface 12A2b. That is, the above idea is applied to the vehicle lamp 10 of the first embodiment including one exit surface, for example, other than the vehicle lamp 10A of the second embodiment including the first exit surface 12A1a and the second exit surface 12A2b. It can also be applied.

The second exit surface 12A2b, which is the final exit surface, is configured as a semi-cylindrical surface 12A2b3 (semi-cylindrical refracting surface) to give a unified appearance extending in a line in a predetermined direction. It is due to the fact that

Despite the fact that the second exit surface 12A2b, which is the final exit surface, is a semi-cylindrical surface 12A2b3 (semi-cylindrical refracting surface), the spot light distribution pattern P _SPOT is focused in the horizontal and vertical directions. It is possible to form the first lens unit 12A1 that mainly collects light in the horizontal direction.
The exit surface 12A1a (semi-cylindrical refracting surface) is in charge, and the lens body 12J mainly collects light in the vertical direction.
This is because the second exit surface 12A2b (semi-cylindrical refracting surface) of the second lens portion 12A2, which is the final emission surface of the above, is in charge. That is, it is due to the decomposition of the light collecting function.

It should be noted that each concept described in the first to ninth embodiments and each modification thereof, for example, the concept of "giving a camber angle" described in the fifth embodiment, and the occurrence of the camber angle. The idea of improving the above-mentioned blur as described above, the idea of "providing a slant angle" described in the sixth embodiment, and the above-mentioned rotation generated by the addition of the slant angle are performed as described above. The idea of suppressing, the idea of "providing a camber angle and a slant angle" described in the seventh embodiment, and the blurring and rotation generated by the addition of the camber angle and the slant angle are as described above. It goes without saying that the idea of improvement and suppression can be applied to the vehicle lighting tool 10J (lens body 12J) of the present embodiment.

Further, in the tenth embodiment, the second optical system (see FIG. 49 (b)) is configured to form the mid light distribution pattern P _MID , and the third optical system (see FIG. 49 (c)) is formed. Although an example configured to form a wide light distribution pattern P _WIDE has been described, the present invention is not limited thereto.

For example, on the contrary, the second optical system (see FIG. 49 (b)) has a wide light distribution pattern P _WI.
It may be configured to form a _DE , and the third optical system (see FIG. 49 (c)) may be configured to form a mid light distribution pattern P _MID .

For example, the surface shapes (for example, the curvature in the horizontal direction) of the pair of left and right incident surfaces 42a and 42b and / or the pair of left and right side surfaces 44a and 44b constituting the second optical system are adjusted as shown in FIG. 54 (a). As a result, the light distribution pattern can be expanded (for example, in the horizontal direction), and FIG. 54 (b) shows.
The light distribution pattern can be narrowed (for example, in the horizontal direction) by adjusting as shown in. Therefore, by adjusting the surface shapes (for example, the curvature in the horizontal direction) of the pair of left and right incident surfaces 42a and 42b and / or the pair of left and right side surfaces 44a and 44b constituting the second optical system, the light distribution pattern for the mid can be obtained. Not limited to this, a wide light distribution pattern can also be formed.

Similarly, by adjusting the surface shape (for example, the curvature in the horizontal direction) of the upper incident surface 42c constituting the third optical system as shown in FIG. 55 (a), the light distribution pattern can be adjusted (for example, in the horizontal direction). ) Can be expanded, and the light distribution pattern can be narrowed (for example, in the horizontal direction) by adjusting as shown in FIG. 55 (b). Therefore, by adjusting the surface shape (for example, the curvature in the horizontal direction) of the upper incident surface 42b constituting the third optical system, the light distribution pattern for wide is not limited.
It is also possible to form a light distribution pattern for the mid.

Of course, the second optical system (see FIG. 49 (b)) and the third optical system (see FIG. 49 (c))
All of them may be configured to form a wide light distribution pattern P _WIDE . Conversely, the second optical system (see FIG. 49 (b)) and the third optical system (see FIG. 49 (c)) may both be configured to form the mid light distribution pattern P _MID. ..

Next, the vehicle lighting fixture 10K (lens body 12K) of the eleventh embodiment will be described with reference to the drawings.

The vehicle lighting fixture 10K (lens body 12K) of the present embodiment is configured as follows.

FIG. 56 is a perspective view of a vehicle lamp 10K (lens body 12K), FIG. 57 (a) is a top view, and FIG.
7 (b) is a front view, and FIG. 57 (c) is a side view. FIG. 58 (a) is an example of a low beam light distribution pattern _PLO (composite light distribution pattern) formed by a vehicle lamp 10K (lens body 12K), and each part shown in FIGS. 58 (b) to 58 (d). It is formed by superimposing the distributed light patterns P _SPOT , P _MID , and P _WIDE .

Lens body 12K of the present embodiment, similarly to the tenth embodiment, a light distribution pattern for spot P _SP
First optical system (see FIGS. 59 (a) and 59 (b)) forming an _OT (see FIG. 58 (b)), light distribution pattern for spots P _MID (light distribution pattern for mids diffused from _SPOT ) (see FIG. 59 (b)). The second optical system (see FIG. 60 (a)) forming the 58 (c)) and the wide light distribution pattern P _WIDE (see FIG. 58 (d)) diffused from the mid light distribution pattern P _MID . It includes a third optical system to be formed (see FIG. 60B).

Hereinafter, the differences from the vehicle lighting fixture 10J (lens body 12J) of the tenth embodiment will be mainly described, and the same configuration as the vehicle lighting fixture 10J (lens body 12J) of the tenth embodiment will be the same. A reference numeral is added and the description thereof will be omitted.

As shown in FIGS. 56 and 57, the lens body 12K of the present embodiment is a lens body arranged in front of the light source 14, and is a rear end portion 12Kaa, a front end portion 12Kbb, a rear end portion 12Kaa, and a front end portion 12Kbb. The light from the light source 14 (to be exact, the reference point F) incident on the inside of the lens body 12K including the pair of left and right side surfaces 44a and 44b, the upper surface 44c and the lower surface 44d arranged between the lens body and the front end portion 12Kbb ( It is configured as a lens body that forms the low beam light distribution pattern P _Lo (corresponding to the predetermined light distribution pattern of the present invention) shown in FIG. 58 (a) by emitting light from the exit surface 12 Kb) and irradiating the front. There is. The lens body 12K includes a lower reflective surface 12b arranged between the rear end portion 12Kaa and the front end portion 12Kbb, and the front end portion 12Kbb side to the rear end portion 1
It is configured as a bell-shaped lens body that narrows in a cone shape toward the 2Kaa side.

The lens body 12K of the present embodiment is integrally molded (by injection molding) by injecting a transparent resin such as polycarbonate or acrylic, cooling and solidifying, as in each of the above-described embodiments.

FIG. 61A is a front view of the rear end portion 12Kaa of the lens body 12K, and FIG. 61B is FIG.
A1-A1 cross-sectional view (schematic view) of a), FIG. 61 (c) is a B1-B1 cross-sectional view of FIG. 61 (a).
Schematic diagram).

As shown in FIGS. 61A and 61B, the rear end portion 12Kaa of the lens body 12K has a light source 14 and a first incident surface on both the left and right sides of the first incident surface 12a and the first incident surface 12a. It includes a pair of left and right incident surfaces 42a and 42b arranged so as to surround the space between the surfaces 12a from both the left and right sides. The rear end portion 12Kaa is further provided as shown in FIGS. 61 (a) and 61 (c).
Above the first incident surface 12a, an upper incident surface 42c arranged so as to surround the space between the light source 14 and the first incident surface 12a from above is included.

The tip of the lower reflective surface 12b includes a shade 12c.

The front end portion 12Kbb of the lens body 12K includes an exit surface 12Kb, and the exit surface 12K
As shown in FIG. 56, b is an exit surface 12d (convex surface convex toward the front) similar to that of the first embodiment, and a pair of left and right exit surfaces 46a and 46b arranged on both left and right sides of the exit surface 12d. In addition, the exit surface 46c arranged above the exit surface 12d and the pair of left and right exit surfaces 46a and 46b.
Includes. The exit surface 12d and the pair of left and right exit surfaces 46a, 46b (and the exit surface 46c) are smoothly smooth without a step through a connecting surface 46d (a surface for which an optical function is not intended) surrounding the emission surface 12d. It is connected.

59 (a) is a side view of the first optical system, and FIG. 59 (b) is an enlarged side view.

As shown in FIGS. 59 (a) and 59 (b), the first incident surface 12a, the lower reflecting surface 12b (and the shade 12c), and the emitting surface 12Kb were incident on the inside of the lens body 12K from the first incident surface 12a. Of the light Ray _SPOT from the light source 14, the light partially blocked by the shade 12c and the light internally reflected by the lower reflecting surface 12b are part of the emitting surface 12Kb in the region A1 (exit surface 12d. FIG. 57 (Fig. 57). As shown in FIG. 58 (b), a spot light distribution pattern P _SPOT (in the present invention) including a cut-off line defined by a shade 12c at the upper end edge by emitting light from (see b)) and irradiating forward. It constitutes a first optical system (corresponding to the first light distribution pattern).

FIG. 60A is a top view of the second optical system.

As shown in FIG. 60A, a pair of left and right incident surfaces 42a and 42b and a pair of left and right side surfaces 44a.
, 44b, and the exit surface 12Kb are lens bodies 12 from a pair of left and right incident surfaces 42a, 42b.
Light Ra from the light source 14 incident on the inside of K and internally reflected by a pair of left and right side surfaces 44a and 44b.
y _MID is mainly emitted from the left and right side regions A2 and A3 (a pair of left and right exit surfaces 46a and 46b; see FIG. 57 (b)) of a part of the exit surface 12Kb and is irradiated forward. Accordingly, as shown in FIG. 58 (c), constituting a second optical system for forming is superimposed on the spot light distribution pattern P _sPOT, mid light distribution pattern P _MID diffused from the light distribution pattern P _sPOT spot are doing.

The pair of left and right incident surfaces 42a and 42b are lenses obtained by refracting the light from the light source 14 that does not enter the first incident surface 12a (mainly the light Ray _MID spreading in the left-right direction. See FIG. 61 (b)). A surface incident on the inside of the body 12K, as shown in FIG. 61B, is configured as a curved surface (for example, a free curved surface) that is convex toward the light source 14.

As shown in FIG. 57A, the pair of left and right side surfaces 44a and 44b have a front end portion 12 in a top view.
It is configured as a curved surface (for example, a free curved surface) that is convex toward the outside in which the distance between the pair of left and right side surfaces 44a and 44b narrows in a tapered shape from the Kbb side toward the rear end portion 12Kaa side. Further, as shown in FIG. 57 (c), the pair of left and right side surfaces 44a and 44b have a shape in which the upper edge and the lower edge are tapered in a side view from the front end portion 12Kbb side toward the rear end portion 12Kaa side. It is configured as a surface of.

The pair of left and right side surfaces 44a and 44b are the pair of left and right exit surfaces 46a and 46b that transmit the light Ray _MID from the light source 14 incident on the inside of the lens body 12K from the pair of left and right incident surfaces 42a and 42b.
It is a reflective surface that reflects internally (total internal reflection) toward the surface, and does not use metal vapor deposition.

The pair of left and right exit surfaces 46a and 46b are configured as planar surfaces. of course,
Not limited to this, it may be configured as a curved surface.

The second optical system having the above configuration forms the mid light distribution pattern P _MID shown in FIG. 58 (c) on the virtual vertical screen.

The vertical dimension of the light distribution pattern P _MID for the mid is about 15 degrees in FIG. 58 (c).
Not limited to this, for example, it can be freely adjusted by adjusting the surface shapes (for example, the curvature in the vertical direction) of the pair of left and right incident surfaces 42a and 42b.

The position of the upper end edge of the mid light distribution pattern P _MID is along the horizontal line in FIG. 58 (c), but is not limited to this, and the surface shapes of the pair of left and right incident surfaces 42a and 42b (for example, the pair of left and right surfaces). It can be freely adjusted by adjusting the inclination of the incident surfaces 42a and 42b).

Further, the right end and the left end of the mid light distribution pattern P _MID extend to about 55 degrees to the right and about 55 degrees to the left in FIG. 58 (c), but are not limited to this, for example, a pair of left and right incident surfaces 42a. 42
It can be freely adjusted by adjusting b and / or a pair of left and right side surfaces 44a and 44b (for example, the respective horizontal curvatures).

FIG. 60B is a side view of the third optical system.

As shown in FIG. 60B, the upper entrance surface 42c, the upper surface 44c, and the exit surface 12Kb are
A light source 14 that is incident on the inside of the lens body 12K from the upper incident surface 42c and internally reflected on the upper surface 44c.
The light Ray _{WIDE from} is mainly from the upper regions A4 (exit surface 46c, see FIG. 57 (b)) of each of the left and right side regions A2 and A3 of the partial region A1 and the partial region A1 of the exit surface 12 Kb. by being irradiated forward emitted, as shown in FIG. 58 (d), it is superimposed on the light distribution pattern for spot P _sPOT and mid light distribution pattern P _MID, mid light distribution pattern P _MID
It constitutes a third optical system that forms a more diffused wide light distribution pattern P _WIDE .

The upper incident surface 42c is light from the light source 14 that is not incident on the first incident surface 12a (mainly, light).
Light Ray _WIDE spreading upward. (See FIG. 61 (c)) is a surface that is refracted and incident inside the lens body 12K, and as shown in FIG. 61 (c), a curved surface (for example, a curved surface that is convex toward the light source 14).
It is configured as a free-form surface).

As shown in FIGS. 56 and 57 (c), the upper surface 44c is a curved surface that is inclined outward from the front end portion 12Kbb side of the lens body 12K toward the rear end portion 12Kaa side in a side view. It is configured as a surface of shape. Further, the upper surface 44c has a top surface 44c as shown in FIG. 57 (a).
When viewed from above, the left edge and the right edge of the lens body 12K are configured as a surface having a tapered shape toward the rear end portion 12Kaa side from the front end portion 12Kbb side. In particular,
The upper surface 44c is a light source 14 incident on the inside of the lens body 12K from the upper incident surface 42c (to be exact,
The surface shape of the light Ray _WIDE from the reference point F) is configured to be parallel light in the vertical direction. Further, the upper surface 44c extends in a direction orthogonal to the paper surface in FIG. 57 (c) with respect to the horizontal direction.

The upper surface 44c is a reflecting surface that internally reflects (totally reflects) the light Ray _WIDE from the light source 14 incident on the inside of the lens body 12K from the upper incident surface 42c toward the exit surface 46c, and does not use metal vapor deposition.

The exit surface 46c is configured as a planar surface. Of course, the present invention is not limited to this, and the surface may be configured as a curved surface.

Instead of the above, the third optical system includes the upper incident surface 42c and the exit surface 46c, and the light Ray _WIDE from the light source 14 incident on the inside of the lens body 12K from the upper incident surface 42c is internally reflected. By emitting directly from the exit surface 46c and irradiating forward without any problem, FIG.
As shown in 8 (d), an optical system that forms a wide light distribution pattern P _WIDE may be used.

The wide light distribution pattern P _WIDE shown in FIG. 58 (d) is formed on the virtual vertical screen by the third optical system having the above configuration.

The vertical dimension of the wide light distribution pattern P _WIDE is about 15 degrees in FIG. 58 (d).
Not limited to this, for example, it can be freely adjusted by adjusting the surface shape (for example, the curvature in the vertical direction) of the upper incident surface 42c.

Further, the position of the upper end edge of the wide light distribution pattern P _WIDE is substantially along the horizontal line in FIG. 58 (d), but is not limited to this, and can be freely adjusted by adjusting the inclination of the upper surface 44c. it can.

In the present embodiment, as shown in FIG. 56, the upper surface 44c includes an upper left surface 44c2 and a right upper surface 44c3 partitioned by a vertical plane including a reference axis AX1, respectively, and the upper left surface 44c2 and the right upper surface 44c3 are included. The slopes are different from each other. Specifically, the upper left surface 44c2
Is tilted below the upper right surface 44c3. As a result, as shown in FIG. 58 (d), the wide light distribution pattern P _WIDE includes a cut-off line at the upper end edge, in which the upper left edge is lower than the upper right edge with respect to the vertical line. Can be (in the case of right-hand traffic). Of course, on the contrary, the upper left surface 44c2 may be tilted above the right upper surface 44c3. As a result, the wide light distribution pattern P _WIDE can include a cut-off line in which the upper left edge on the left side of the vertical line is higher than the upper edge on the right side (in the case of left-hand traffic).

Further, the right end and the left end of the wide light distribution pattern P _WIDE extend to about 60 degrees to the right and about 60 degrees to the left in FIG. 58 (d), but are not limited to this, for example, the upper incident surface 42c (for example, for example). It can be freely adjusted by adjusting the curvature in the horizontal direction).

Next, the appearance of the lens body 12K when the light source 14 is not lit will be described.

The lens body 12K of the present embodiment is viewed from multiple directions when the light source 14 is not lit.
It looks as if the inside of the lens body is emitting light, giving it a "glittering feeling".

This is a configuration in which external light (for example, sunlight) incident on the inside of the lens body 12K from the exit surface 12Kb is easily satisfied with the condition of internal reflection (total reflection) inside the lens body 12K. Is configured as a bell-shaped lens body in which the lens body 12K narrows in a pyramidal shape from the front end portion 12Kbb side toward the rear end portion 12Kaa side (see FIGS. 57 (a) and 57 (c)). In addition to the first condition), at least one of the incident surfaces 12a, 42a, 42b, and 42c has a V-shape (or V-shape) that opens toward the front end 12Kbb side in top view and / or side view. This is due to the fact that it constitutes (a part) (see the dotted circle (thick line) indicated by the reference numerals C1 to C4 in FIGS. 62 (a) to 62 (c)) (second condition). It is sufficient that at least one of the first condition and the second condition is satisfied.

For example, the pair of incident surfaces 42a and 42b on the left and right form a V-shape that opens toward the front end portion 12Kbb side in a side view (reference numerals C1 in FIGS. 62A and 62C). Inside the dotted circle (thick line) shown). Further, the pair of incident surfaces 42a and 42b on the left and right are the front end 1 in the top view.
It constitutes a part of the V-shape that opens toward the 2Kbb side (reference numeral C2 in FIG. 62B).
In the dotted circle (thick line) indicated by). Further, the first incident surface 12a is a front end portion 12K in a top view.
It forms a V-shape that opens toward the bb side (see the dotted circle (thick line) indicated by the symbol C3 in FIG. 62 (b)). Further, the upper incident surface 42c constitutes a part of a V-shape that opens toward the front end portion 12Kbb side in a side view (inside the dotted circle (thick line) indicated by the reference numeral C4 in FIG. 62C). )reference).

As described above, in addition to the lens body 12K being configured as a bell-shaped lens body that narrows in a cone shape from the front end portion 12Kbb side toward the rear end portion 12Kaa side, the incident surface 12a
, 42a, 42b, 42c form a V-shape (or a part of the V-shape) that opens toward the front end portion 12Kbb side in top view and / or side view. External light (for example, sunlight) incident on the inside of the lens body 12K from the surface 12Kb repeats internal reflection (total reflection) inside the lens body 12K (the V-shaped portion, etc.), and most of it is emitted again. It emits light from 12 Kb in various directions.

For example, the external light RayCC shown in FIGS. 63 (a) and 63 (b) is incident on the inside of the lens body 12K from the exit surface 12Kb, and is internally reflected on the left side surface 44a and the right side surface 44b in this order (in this order).
After total reflection), the light is emitted from the exit surface 12 Kb again. Further, for example, the external light RayDD shown in FIGS. 63 (a) and 63 (c) is incident on the inside of the lens body 12K from the emission surface 12Kb.
After internal reflection (total reflection) is performed in this order on the lower surface 44d, the upper incident surface 42c, and the upper surface 44c, the light is emitted from the exit surface 12Kb again.

Under the actual driving environment (for example, under the driving environment in the daytime), the above-mentioned external light RayCC, Ray
External light (for example, sunlight) from all directions, not limited to DD, is incident inside the lens body 12K, and internal reflection (total reflection) is repeated inside the lens body 12K (the V-shaped portion, etc.). Most of them are emitted again from the exit surface 12Kb in various directions (see FIG. 64). As a result, when the light source 14 is not lit, the lens body 12K has a "glittering feeling" as if the inside of the lens body is emitting light when viewed from multiple directions. FIG. 64 shows
A light source 50 that looks like external light is arranged in front of the lens body 12K, and represents an optical path (simulation result) that light from the light source 50 that is incident on the inside of the lens body 12K from the emission surface 12Kb follows.

According to the present embodiment, in addition to the effects of the tenth embodiment, the following effects can be further achieved.

That is, a lens body 12K whose appearance is not monotonous and a vehicle lamp 1 equipped with the lens body 12K.
0K, especially when the light source 14 is not lit, the lens body 12K and vehicles equipped with it give a "glittering feeling" as if the inside of the lens body is emitting light when viewed from multiple directions. A lamp 10K can be provided. As a result, the visibility when the light source 14 is not lit (vehicle lamp 10K, and by extension, the visibility of the vehicle on which the light source 14 is mounted) can be improved.

The reason why the appearance is not monotonous is that the lens body 12K is not a conventional simple plano-convex lens, but a pair of left and right side surfaces 44a, 44 arranged between the rear end portion 12Kaa and the front end portion and 12bb.
This is because the cross section surrounded by b, the upper surface 44c and the lower surface 44d is configured as a rectangular lens body.

Further, when the light source 14 is not lit, when viewed from multiple directions, the lens body 12K has a “glittering feeling” as if the inside of the lens body is emitting light from the front end portion 12Kbb side. In addition to being configured to narrow in a cone shape toward the rear end 12Kaa side, at least one of the incident surfaces is top view and / or side view, and the front end 12K.
As a result of forming a V-shape or a part of the V-shape that opens toward the bb side, the exit surface is 12K.
External light (for example, sunlight) incident on the inside of the lens body 12K from b repeats internal reflection (total reflection) inside the lens body 12K (the V-shaped portion, etc.), and most of it is again emitted from the exit surface 12Kb. This is due to the fact that the light is emitted in various directions.

It should be noted that the ideas described in the first to tenth embodiments and their respective modifications, for example, the second.
The idea of "disassembling the condensing function" explained in the embodiment, the idea of "giving a camber angle" explained in the fifth embodiment, and the above-mentioned blurring caused by the addition of the camber angle are as described above. The idea of improving by making a slant angle, the idea of "giving a slant angle" described in the sixth embodiment, and the idea of suppressing the rotation generated by the addition of the slant angle as described above, the seventh. The idea of "providing a camber angle and a slant angle" described in the embodiment, and the idea of improving and suppressing the blurring and rotation caused by the addition of the camber angle and the slant angle are described as described above. Of course, it can be applied to the vehicle lighting tool 10K (lens body 12K) of the present embodiment.

Next, the lens body 12L, which is a first modification of the lens body 12K of the eleventh embodiment, will be described with reference to the drawings.

FIG. 65 (a) is a vertical cross-sectional view showing an optical path followed by light from a light source 14 incident on the inside of the lens body 12K of the eleventh embodiment, and FIG. 65 (b) is a perspective view of the lens body 12L of this modified example. ..

As a result of confirmation by the present inventors by simulation, as shown in FIG. 65 (a), in the lens body 12K of the eleventh embodiment, the incident surfaces 12a, 42a, 42b, 42c are incident on the inside of the lens body 12K. It was found that the light from the light source 14 did not enter the lower surface 44d, that is, the lower surface 44d was a region not used for forming the respective light distribution patterns P _SPOT , P _MID , and P _WIDE .

As shown in FIG. 65 (b), the lens body 12L of this modified example has each light distribution pattern P _SPOT.
, P _MID , P _WIDE Not used to form a plurality of quadrangular pyramid-shaped lens cuts L on the lower surface 44d
It corresponds to the one provided with C (for example, a firing angle of 30 °, a pitch of 5 mm, and a mountain height of 3 mm).
Other than that, it has the same configuration as the lens body 12K of the eleventh embodiment. In addition, each lens cut LC may have the same size and the same shape, or may have a different size and a different shape. Further, they may be arranged in an aligned manner or may be arranged at random.

According to this modification, in addition to the effects of the eleventh embodiment, the following effects can be further obtained.

That is, when the light source 14 is not lit, the lens body 12L and the vehicle lamp 10L equipped with the lens body 12L have a “glittering feeling” as if the inside of the lens body is emitting light when viewed from multiple directions. Can be provided. As a result, the visibility when the light source 14 is not lit (vehicle lamp 10L, and by extension, the visibility of the vehicle on which the light source 14 is mounted) can be improved.

This is because external light (for example, sunlight) incident on the inside of the lens body 12L from the emission surface 12Kb is applied to the inside of the lens body 12L (the lower surface 44d) of a plurality of quadrangular pyramid-shaped lens cuts L.
This is due to internal reflection (total reflection) in various directions in (C, etc.) and re-emission from the exit surface 12Kb in various directions.

In order to confirm this effect, the present inventors actually manufactured the lens body 12L of the present modification and the lens body of the comparative example (lens body 12K of the eleventh embodiment), and each emission surface 12Kb has a brightness. It was measured using a meter (trade name: Prometric).

66 (a) to 66 (c) are diagrams showing the measurement results (luminance distribution) of the exit surface 12 Kb of the lens body 12 L of this modified example, and FIGS. 66 (d) to 66 (f) are comparative examples. It is a figure which shows the measurement result (luminance distribution) of the exit surface 12Kb of the lens body (the lens body 12K of the eleventh embodiment). The numerical value in each figure represents the measurement position. For example, 0 ° left and right and 0 ° up and down in FIG. 66 (a) are
The measurement position of the measurement result (luminance distribution) shown in the figure is 0 ° to the left and right with respect to the center of the exit surface 12Kb.
It indicates that the position is 0 ° up and down (that is, directly in front). The same applies to other figures. Then, in each figure, the black portion indicates that the brightness is relatively low, and the white portion indicates that the brightness is relatively high.

Referring to FIGS. 66 (a) to 66 (f), the lens body 12L of this modified example having a lower surface 44d to which a plurality of quadrangular pyramid-shaped lens cut LCs are provided has a flat lower surface 44d. From the lens body of the example (lens body 12K of the eleventh embodiment), the white part and the black part are clearly separated over the entire output surface 12Kb, that is, the lens body 12L of this modification.
Compared to the lens body of the comparative example (lens body 12K of the eleventh embodiment), when the light source 14 is not lit, there is a "glittering feeling" as if it were emitting light when viewed from multiple directions. You can see that it looks good.

The lower surface 44d is not limited to a surface including a plurality of quadrangular pyramid-shaped lens cut LCs, and external light incident on the inside of the lens body 12L from the exit surface 12Kb and reaching the lower surface 44d is internally reflected in various directions ( It may be configured as a surface that is totally reflected) and is emitted from the exit surface 12Kb again. For example, the lower surface 44d may be configured as a surface including a plurality of lens cuts having a polygonal pyramid shape other than a quadrangular pyramid shape, or a surface including a textured surface or a cut surface including a plurality of other minute irregularities. It may have been.

Next, the lens body 12M, which is a second modification of the lens body 12K of the eleventh embodiment, will be described with reference to the drawings.

FIG. 67A is a cross-sectional view showing an optical path followed by light from a light source 14 incident on the inside of the lens body 12K of the eleventh embodiment, and FIG. 67B is a perspective view of the lens body 12M of the present modification. ..

As a result of confirmation by the present inventors by simulation, as shown in FIG. 67A, in the lens body 12K of the eleventh embodiment, the incident surfaces 12a, 42a, 42b, 42c are incident on the inside of the lens body 12K. The light from the light source 14 does not enter the extension regions 44aa and 44bb extending forward from the front edge of the pair of left and right side surfaces 44a and 44b (for example, extending in a direction parallel to the reference axis AX1), that is, It was found that the extension regions 44aa and 44bb are regions that are not used for forming the respective light distribution patterns P _SPOT , P _MID , and P _WIDE .

As shown in FIG. 67 (b), the lens body 12M of this modified example has each light distribution pattern P _SPOT.
, P _MID , P _WIDE are not used for forming extension regions 44aa and / or 44bb provided with a plurality of quadrangular pyramid-shaped lens cut LCs (for example, a plane angle of 30 °, a pitch of 5 mm, and a mountain height of 3 mm). Equivalent to. Other than that, it has the same configuration as the lens body 12K of the eleventh embodiment. In addition, each lens cut LC may have the same size and the same shape, or may have the same shape.
They may have different sizes and shapes. Further, they may be arranged in an aligned manner or may be arranged at random.

According to this modification, in addition to the effects of the eleventh embodiment, the following effects can be further obtained.

That is, when the light source 14 is not lit, the lens body 12M and the vehicle lamp 10M equipped with the lens body 12M have a “glittering feeling” as if the inside of the lens body is emitting light when viewed from multiple directions. Can be provided. As a result, the visibility when the light source 14 is not lit (vehicle lamp 10M, and by extension, the visibility of the vehicle on which the light source 14 is mounted) can be improved.

This is because the external light (for example, sunlight) incident on the inside of the lens body 12M from the emission surface 12Kb is inside the lens body 12M (a plurality of square cone-shaped lens cut LCs applied to the extension regions 44aa and 44bb). Inwardly reflected (totally reflected) in various directions and again emitted surface 12
This is due to the emission from Kb in various directions.

The extension regions 44aa and 44bb are not limited to the surfaces including a plurality of quadrangular pyramid-shaped lens cut LCs, but are incident on the inside of the lens body 12M from the exit surface 12Kb and the extension regions 44aa and 4bb.
It suffices that the external light reaching 4bb is internally reflected (totally reflected) in various directions and is configured as a surface to be emitted from the exit surface 12Kb again. For example, the extension regions 44aa and 44bb may be configured as a surface including a plurality of lens cuts having a polygonal pyramid shape other than the quadrangular pyramid shape.
It may be configured as a textured surface including a plurality of other minute irregularities or a surface including a cut surface.

FIG. 68A shows a plurality of lens bodies 1 which are first modifications of the lens body 12K of the eleventh embodiment.
It is a perspective view of the lens coupling body 16L which connected 2L.

As shown in FIG. 68A, the lens coupling body 16L includes a plurality of lens bodies 12L. The lens coupling body 16L (plurality of lens bodies 12L) is integrally molded (injection molding) by injecting a transparent resin such as polycarbonate or acrylic into a mold, cooling and solidifying the mold. The exit surfaces 12Kb of each of the plurality of lens bodies 12L are arranged in a horizontal row in a state of being adjacent to each other, and form a group of emission surfaces having a sense of unity extending in a horizontal line.

By using the lens coupling body 16L having the above configuration, it is possible to construct a vehicle lamp with a sense of unity extending in a line in the horizontal direction. The lens coupling body 16L may be formed by molding a plurality of lens bodies 12L in a physically separated state and connecting (holding) them with a holding member (not shown) such as a lens holder.

As shown in FIG. 68B, a padding 16La may be provided in the gap between the respective lens bodies 12L. For example, the lower surface 44d may be extended to close the gap between the respective lens bodies 12L, or the additional lens portion (with the lower surface 44d) physically formed as a separate member in the gap between the respective lens bodies 12L. An additional lens portion) including a similar lower surface may be arranged. In this way, the external light incident from here is also the lower surface 44d (that is, the lower surface 44d) inside the lens body 12L.
As a result of internal reflection (total reflection) in various directions by the action of the plurality of lens cut LCs) and the light emitted from the exit surface 12 Kb again, the above-mentioned "glittering feeling" can be further enhanced.

Next, the vehicle lamp 10N (lens body 12N) of the twelfth embodiment will be described with reference to the drawings.

The vehicle lighting fixture 10N (lens body 12N) of the present embodiment is configured as follows.

FIG. 69 is a perspective view of a vehicle lamp 10N (lens body 12N), and FIG. 70A is a top view and FIG. 7.
0 (b) is a front view, and FIG. 70 (c) is a side view. FIG. 71 (a) is an example of a low beam light distribution pattern _PLO (composite light distribution pattern) formed by a vehicle lamp 10N (lens body 12N), and each part shown in FIGS. 71 (b) to 71 (e). Distributed light pattern P _SPOT , P _{MID_L} , P _{MID_R}
, P _WIDE are superimposed to form.

The vehicle lighting fixture 10N (lens body 12N) of the present embodiment has a pair of left and right second lower reflecting surfaces 48a and 48b with respect to the vehicle lighting fixture 10J (lens body 12J) of the tenth embodiment shown in FIG.
(And shades 48c, 48d) are added. The final exit surface (second exit surface 12A2b) of the lens body 12N of the present embodiment is a semi-cylindrical surface (cylindrical surface) to which a slant angle and / or a camber angle is imparted, unlike the tenth embodiment. It is configured. Further, unlike the tenth embodiment, the upper surface 44Nc of the present embodiment functions as an exit surface from which light from the light source 14 incident on the inside of the lens body 12N is emitted from the upper incident surface 42c. Other than that, it has the same configuration as the vehicle lamp 10J (lens body 12J) of the tenth embodiment.

As a result of confirmation by the present inventor by simulation, the vehicle lamp 10J of the tenth embodiment (
In the lens body 12J), when the relative positional relationship of the lens body 12J with respect to the light source 14 deviates from the design value, glare occurs in the mid light distribution pattern P _MID as shown in FIG. 77 (a). There was found. In FIG. 77 (a), the light source 14 (light emitting surface) is 1 mm square, and the light source 1
The relative positional relationship of the lens body 12J with respect to 4 is +0 in the Y direction (vertical direction) from the design value.
It represents the glare that occurs when the deviation is 2 mm.

When the relative positional relationship of the lens body 12J with respect to the light source 14 is as designed, FIG.
As shown in 7 (b), no glare occurs in the mid light distribution pattern P _MID .

However, when actually manufacturing a vehicle lamp, it is difficult to make the relative positional relationship of the lens body 12J with respect to the light source 14 according to the design value due to the influence of assembly error and the like, and the relative position of the lens body 12J with respect to the light source 14 The positional relationship deviates from the design value.

The present inventor suppresses the occurrence of glare in the mid light distribution pattern P _MID due to the relative positional relationship of the lens body 12J with respect to the light source 14 deviating from the design value as described above. As a result of diligent studies, apart from the first lower reflecting surface 12b (and shade 12c) constituting the first optical system forming the spot light distribution pattern P _SPOT , the mid light distribution pattern P _MI
By adding a pair of left and right second lower reflecting surfaces 48a and 48b (and shades 48c and 48d) to the second optical system forming _D , the light that causes the glare is distributed below the cut-off line. It has been found that glare can be suppressed in the mid light distribution pattern P _MID .

Based on this knowledge, the vehicle lighting fixture 10N (lens body 12N) of the present embodiment has a pair of left and right second lower reflecting surfaces arranged on both left and right sides of the first lower reflecting surface 12b (and shade 12c). It includes 48a, 48b (and shades 48c, 48d).

Hereinafter, the differences from the vehicle lighting fixture 10J (lens body 12J) of the tenth embodiment will be mainly described, and the same reference numerals will be given to the same configurations as the vehicle lighting fixture 10J (lens body 12J) of the tenth embodiment. The explanation will be omitted.

Lens body 12N of the present embodiment, similarly to the tenth embodiment, a light distribution pattern for spot P _{SP
In addition} to the first optical system (see FIG. 49 (a)) forming the _OT (see FIG. 71 (b)),
A second optical system (see FIGS. 73 and 74) that forms a mid light distribution pattern P _{MID_L} and P _{MID_R} (see FIGS. 71 (c) and 71 (d)) diffused from the spot light distribution pattern P _SPOT . as well as,
A third optical system (see FIG. 76) that forms a wide light distribution pattern P _WIDE (see FIG. 71 (e)) diffused from the mid light distribution pattern P _MID is provided.

The lens body 12N of the present embodiment is a lens body arranged in front of the light source 14, and is shown in FIG.
9. As shown in FIG. 70, a light source including a pair of left and right side surfaces 44a and 44b and an upper surface 44Nc arranged between the rear end portion, the front end portion, the rear end portion and the front end portion, and incident on the inside of the lens body 12N. 14
Light from the front end (second exit surface 12A2b) and upper surface 44Nc is emitted forward and is irradiated forward, so that the light distribution for low beam including a cut-off line at the upper end edge is as shown in FIG. 71 (a). It is configured as a lens body that forms a pattern P _Lo .

Specifically, the lens body 12N has a first rear end portion 12A1aa, a first front end portion 12A1bb, and the like.
A pair of left and right side surfaces 4 arranged between the first rear end portion 12A1aa and the first front end portion 12A1bb.
4a, 44b, and a first lens portion 12A1 including a first lower reflecting surface 12b arranged between the first rear end portion 12A1aa and the first front end portion 12A1bb, and arranged in front of the first lens portion 12A1. , The second lens portion 12A including the second rear end portion 12A2aa and the second front end portion 12A2bb.
2 and a connecting portion 12A3 connecting the first lens portion 12A1 and the second lens portion 12A2, and further, a first rear end portion 12A1aa of the first lens portion 12A1 and a second front end portion 12A2bb of the second lens portion 12A2. The upper surface 44Nc arranged between the lens and the first lens unit 12A1a.
Between the first rear end portion 12A1aa and the first front end portion 12A1bb of a, and the first lower reflecting surface 12
It is configured as a lens body including a pair of left and right second lower reflecting surfaces 48a and 48b arranged on both left and right sides of b.

The lens body 12N of the present embodiment is integrally molded (by injection molding) by injecting a transparent resin such as polycarbonate or acrylic, cooling and solidifying, as in each of the above-described embodiments.

72 (a) is a front view of the first rear end portion 12A1aa of the first lens portion 12A1, FIG. 72 (b).
) Is a sectional view (schematic view) of BB in FIG. 72 (a). The cross-sectional view (schematic view) of AA in FIG. 72 (a) is the same as that in FIG. 50 (b).

As shown in FIGS. 50 and 72 (a), the first rear end portion 12A1aa of the first lens portion 12A1.
Surrounds the space between the light source 14 and the first incident surface 12a arranged in the vicinity of the first incident surface 12a on both the left and right sides of the first incident surface 12a and the first incident surface 12a. It includes a pair of left and right incident surfaces 42a and 42b arranged. The first rear end portion 12A1aa is shown in FIG.
As shown in 2 (a) and FIG. 72 (b), the upper incident surface is further arranged above the first incident surface 12a so as to surround the space between the light source 14 and the first incident surface 12a from above. Includes surface 42c.

The tip of the first lower reflective surface 12b includes a shade 12c.

As shown in FIG. 69, the first front end portion 12A1bb of the first lens portion 12A1 has a semi-cylindrical first exit surface 12A1a (on the first semi-cylindrical surface of the present invention) extending in the vertical direction or the substantially vertical direction. (Equivalent), and a pair of left and right exit surfaces 46a arranged on the left and right sides of the first exit surface 12A1a.
It includes 46b (corresponding to a pair of left and right intermediate exit surfaces of the present invention).

The second rear end portion 12A2aa of the second lens portion 12A2 includes the second incident surface 12A2a (corresponding to the intermediate incident surface of the present invention), and the second front end portion 12A2bb of the second lens portion 12A2 is the second.
It includes an exit surface 12A2b (corresponding to the final exit surface of the present invention).

The final exit surface (second exit surface 12A2b) has a slant angle and /, unlike the tenth embodiment.
Alternatively, it is configured as a semi-cylindrical surface with a camber angle. Along with this, the cylindrical axis (and the _{focused line} F _12A2b ) of the final exit surface (second exit surface _12A2b ) is inclined with respect to the horizontal. The slant angle and / or camber angle are given by the methods described in the fifth to seventh embodiments and the like. The blurring and rotation caused by the addition of the slant angle and / or the camber angle are improved and suppressed by the methods described in the fifth to seventh embodiments and the like.

Of course, not limited to this, the final exit surface (second exit surface 12A2b) has a slant angle and /
Alternatively, it may be configured as a semi-cylindrical surface to which a camber angle is not provided, that is, the columnar axis (and the _{focused line} F _12A2b ) extends in the horizontal direction.

The connecting portion 12A3 connects the first lens portion 12A1 and the second lens portion 12A2 to the first front end portion 12A1bb of the first lens portion 12A1 and the second rear end portion 12A2aa of the second lens portion 12A2 at the upper portions thereof. The space S surrounded by the portions 12A3 is connected in a formed state.

As shown in FIG. 49 (a), the first incident surface 12a, the first lower reflecting surface 12b (and the shade 1).
2c), first semi-cylindrical surface (first exit surface 12A1a), intermediate incident surface (second incident surface 12A)
2a) and the final exit surface (second exit surface 12A2b) are the lens body 12 from the first incident surface 12a.
Of the light from the light source 14 incident on the inside of N, the light partially blocked by the shade 12c of the first lower reflecting surface 12b and the light internally reflected by the first lower reflecting surface 12b are the first semicircular columns. surface(
The first exit surface 12A1a) emits light to the outside of the lens body 12N, and the intermediate incident surface (second incident surface 12A2a) enters the lens body 12N to enter the final exit surface (second exit surface 12A2b).
), And by irradiating forward, the shade 1 of the first lower reflecting surface 12b is attached to the upper end edge.
It constitutes a first optical system that forms a spot light distribution pattern P _SPOT (corresponding to the condensing pattern of the present invention) including a cut-off line defined by 2c.

The spot light distribution pattern P _SPOT shown in FIG. 71 (b) is formed on the virtual vertical screen by the first optical system having the above configuration.

FIG. 73 is a cross-sectional view (main optical surface only) of the second optical system, and FIG. 74 is a vertical cross-sectional view (main optical surface only).

As shown in FIGS. 73 and 74, a pair of left and right incident surfaces 42a and 42b and a pair of left and right side surfaces 44
a, 44b, a pair of left and right second lower reflecting surfaces 48a, 48b (and shades 48c, 48d),
A pair of left and right intermediate exit surfaces (a pair of left and right exit surfaces 46a, 46b), an intermediate incident surface (second incident surface 1)
2A2a) and the final exit surface (second exit surface 12A2b) are a pair of left and right incident surfaces 42a, 42.
Of the light from the light source 14 incident on the inside of the lens body 12N from b and internally reflected by the pair of left and right side surfaces 44a and 44b, the shades 48c and 48d of the pair of left and right second lower reflecting surfaces 48a and 48b.
The light partially blocked by the light and the light internally reflected by the pair of left and right second lower reflecting surfaces 48a and 48b are emitted to the outside of the lens body 12N from the pair of left and right intermediate emitting surfaces (the pair of left and right emitting surfaces 46a and 46b). Further, it is incident on the inside of the lens body 12N from the intermediate incident surface (second incident surface 12A2a), emitted from the final exit surface (second incident surface 12A2b), and is irradiated forward.
As shown in FIGS. 71 (c) and 71 (d), the mid light distribution patterns P _{MID_L} and P _{MID_R} diffused from the spot light distribution pattern P _SPOT superimposed on the spot light distribution pattern P _SPOT (
It constitutes a pair of left and right second optical systems that form (corresponding to the first diffusion pattern of the present invention).

The pair of left and right second lower reflecting surfaces 48a and 48b are planar reflecting surfaces extending forward from the lower end edge (or the vicinity of the lower end edge) of the pair of left and right incident surfaces 42a and 42b. FIG. 75 is an enlarged perspective view of the vicinity of the second lower reflecting surface 48a (and the shade 48c) arranged on the left side. The tip portions of the pair of left and right second lower reflecting surfaces 48a and 48b include shades 48c and 48d.

The pair of left and right second lower reflecting surfaces 48a and 48b are reflective surfaces that totally reflect the light incident on the pair of left and right second lower reflecting surfaces 48a and 48b among the light from the light source 14 incident on the inside of the lens body 12N. , Metal vapor deposition is not used. Of the light from the light source 14 incident on the inside of the lens body 12N, the light incident on the pair of left and right second lower reflecting surfaces 48a and 48b is the left and right pair of second lower reflecting surfaces 4
It is internally reflected by 8a and 48b toward the final exit surface (second exit surface 12A2b), refracted at the final exit surface (second exit surface 12A2b), and heads toward the road surface. That is, the reflected light reflected on the inner surface of the pair of left and right second lower reflecting surfaces 48a and 48b is folded back at the cut-off line and superimposed on the light distribution pattern below the cut-off line. As a result, a cut-off line is formed at the upper end edge of the mid light distribution patterns P _{MID_L} and P _{MID_R} (see FIGS. 71 (c) and 71 (d)).

The positions of the shades 48c and 48d at which the cut-off _lines of the mid light distribution patterns P _{MID_L} and P _{MID_R} are appropriately formed differ depending on the conditions such as the slant angle and / or the camber angle. Have difficulty.

However, for example, using certain simulation software, the final exit surface (
Shades 48c, 48d with respect to the _{focused line} F _12A2b (see FIG. 73) of the second exit surface 12A2b).
Change the position gradually, Mid light distribution pattern P _{MID_L} each time to change, by checking the P _{MID_R,} shade 48c to mid light distribution pattern P _{MID_L,} the cut-off line P _{MID_R} is properly formed, The position of 48d can be found.

The pair of left and right incident surfaces 42a and 42b are the light from the light source 14 that is not incident on the first incident surface 12a (mainly the light Ray _MID spreading in the left-right direction. See FIG. 50 (b)). As shown in FIG. 50B, the surface incident on the inside of the lens portion 12A1 is configured as a curved surface (for example, a free curved surface) that is convex toward the light source 14.

Specifically, the pair of left and right incident surfaces 42a and 42b are mainly the pair of left and right incident surfaces 42a.
The light from the light source 14 incident on the inside of the lens body 12N from 42b and internally reflected by the pair of left and right side surfaces 44a and 44b is the shades 48c and 48d of the pair of left and right second lower reflecting surfaces 48a and 48b in the vertical direction. Condenses in the vicinity (see FIG. 74) and diffuses in the horizontal direction (see FIG. 74).
As shown in FIG. 73), the surface shape is configured.

For example, in FIG. 73, in the left incident surface 42a, the light from the light source 14 that is incident on the inside of the lens body 12N from the left incident surface 42a and is internally reflected by the left surface 44a is reflected in the left second lower direction in the vertical direction. The surface shape is configured so that the surface 48a is focused in the vicinity of the shade 48c (see FIG. 74) and diffuses in the horizontal direction without being condensed (see FIG. 73).

On the other hand, in FIG. 73, on the right incident surface 42b, the light from the light source 14 which is incident on the inside of the lens body 12N from the right incident surface 42b and is internally reflected by the right surface 44b is reflected on the right second lower side in the vertical direction. The light is focused in the vicinity of the shade 48d of the surface 48b (see FIG. 74), and is focused in the vicinity of the final exit surface (second exit surface 12A2b) in the horizontal direction and then diffused (see FIG. 73). The surface shape is configured.

With the second optical system having the above configuration, FIGS. 71 (c) and 71 (d) are displayed on the virtual vertical screen.
The mid light distribution patterns P _{MID_L} and P _{MID_R} shown in the _above are formed.

As described above, the present inventor has a pair of left and right second lower reflecting surfaces 48a, 48b (and shade 48).
By adding c, 48d), the mid light distribution pattern P _MID (P _{MID_L} , P _MI) is used regardless of the direction in which the relative positional relationship of the lens body 12N with respect to the light source 14 deviates from the design value.
It was confirmed by simulation that glare can be suppressed in _{D_R} ).

Incidentally, the light distribution pattern P _{MID_R} for mid shown in mid-light distribution pattern P _{MID_L} and Figure 71 (d) shown in FIG. 71 (c) is not symmetrical to each other, the final output surface (second exit surface 12A
This is because 2b) is configured as a semi-cylindrical surface provided with a slant angle and / or a camber angle. The final exit surface (second exit surface 12A2b) is configured as a semi-cylindrical surface without a slant angle and / or camber angle, that is, a columnar axis (and _{focus line} F _12A2b ) extending in the horizontal direction. If so, the mid light distribution pattern P _{MID_L} and the mid light distribution pattern P _{MID_R} are symmetrical to each other.

FIG. 76 is a side view (main optical surface only) of the third optical system.

As shown in FIG. 76, the upper incident surface 42c and the upper surface 44Nc are obtained by emitting light from the light source 14 incident on the inside of the lens body 12N from the upper incident surface 42c from the upper surface 44Nc and irradiating the upper surface 44Nc forward. As shown in 71 (e), the wide light distribution pattern diffused from the mid light distribution pattern P _{MID_L} and P _{MID_R} superimposed on the spot light distribution pattern P _SPOT and the mid light distribution pattern P _{MID_L} and P _{MID_R.} It constitutes a third optical system that forms P _WIDE (corresponding to the second diffusion pattern of the present invention).

The wide light distribution pattern P _WIDE is a light distribution pattern having a shape in which the vicinity of the center of the upper end edge is recessed downward. The reason is as follows.

As a result of confirmation by the present inventor by simulation, when the relative positional relationship of the lens body 12N with respect to the light source 14 deviates from the design value (for example, when the lens body 12N deviates vertically downward with respect to the light source 14), the figure. As shown by the dotted line in 78, as a result of the wide light distribution pattern P _WIDE moving vertically upward as a whole, glare occurs in the area near the intersection of the H line and the V line (the area where the preceding vehicle and the oncoming vehicle exist). It turned out to occur. FIG. 78 shows the lens body 12 with respect to the light source 14.
It indicates that glare occurs when the relative positional relationship of N deviates from the design value in the Y direction (vertical direction).

When the relative positional relationship of the lens body 12N with respect to the light source 14 is as designed, FIG.
As shown in 1 (e), since the wide light distribution pattern P _WIDE is formed at an appropriate position, glare does not occur.

However, when actually manufacturing a vehicle lamp (lens body), it is difficult to make the relative positional relationship of the lens body 12N with respect to the light source 14 according to the design value due to the influence of assembly error and the like, and the lens body with respect to the light source 14 The relative positional relationship of 12N deviates from the design value.

The present inventor has caused the relative positional relationship of the lens body 12N with respect to the light source 14 to deviate from the design value as described above, and the wide light distribution pattern P _WIDE moves vertically upward as a whole. As a result of diligent studies to prevent glare from occurring in the area near the intersection of the H and V lines (the area where the preceding vehicle and the oncoming vehicle exist), the wide light distribution pattern P _WIDE was _placed in the center of the upper edge. By adopting a light distribution pattern having a shape in which the vicinity is recessed downward, even if the wide light distribution pattern P _WIDE moves vertically upward as a whole, the area near the intersection of the H line and the V line is formed. (
It was found that glare can be suppressed in the area where the preceding vehicle and the oncoming vehicle exist).

Based on this finding, the wide light distribution pattern P _WIDE is a light distribution pattern having a shape in which the vicinity of the center of the upper end edge is recessed downward.

The wide light distribution pattern P _WIDE having a shape including a recess in which the vicinity of the center of the upper end edge is recessed downward can be formed as follows.

The upper incident surface 42c is light from the light source 14 that is not incident on the first incident surface 12a (mainly, light).
Light Ray _WIDE spreading upward. (See FIG. 72 (b)) is a surface that is refracted and incident inside the first lens unit 12A1, and as shown in FIG. 72 (b), a curved surface (for example, a free curved surface) that is convex toward the light source 14. It is configured as.

Unlike the tenth embodiment, the upper surface 44Nc is from the front end portion (second front end portion 12A2bb) side to the rear end portion (first rear end portion 12A1aa) side of the lens body 12N as shown in FIGS. 69 and 76. The lens body 12 is arranged diagonally upward toward the lens body 12 from the upper incident surface 42c.
It functions as an exit surface from which light from the light source 14 incident on the inside of N is emitted. The upper surface 44Nc is
It is configured as a plane-shaped surface. Of course, the present invention is not limited to this, and the upper surface 44c may be configured as a curved surface.

As shown in FIG. 71 (e), the upper incident surface 42c and / or the upper surface 44Nc is formed so that a wide light distribution pattern P _WIDE having a shape including a concave portion in the vicinity of the center of the upper end edge is recessed downward is formed.
The surface shape is configured.

The wide light distribution pattern P _WIDE shown in FIG. 71 (e) is formed on the virtual vertical screen by the third optical system having the above configuration.

According to the present embodiment, in addition to the effects of the tenth embodiment, the following effects can be further achieved.

That is, it is possible to realize an appearance with a sense of unity extending in a line shape in a predetermined direction, and 1
Multiple light distribution patterns (spot light distribution pattern P _SPOT , mid light distribution pattern P _{MID_}
It is possible to provide a lens body 12N capable of forming _L , P _{MID_R,} etc.). In addition, it should be noted
In order to obtain this effect, at least the first optical system and the second optical system need be provided, and the third optical system can be omitted as appropriate.

It is the final exit surface (second) that can achieve a cohesive appearance that extends in a line in a predetermined direction.
This is because the exit surface 12A2b) is configured as a semi-cylindrical surface (semi-cylindrical refracting surface).

Multiple light distribution patterns (spot light distribution pattern P _SPOT , mid light distribution pattern P)
_{MID_L} , P _{MID_R,} etc.) can be formed by one lens body 12N forming a plurality of optical systems, that is, the first optical system in which the spot light distribution pattern P _SPOT is formed, and the mid light distribution pattern P _{MID_L.} , P _{MID_R} is provided because it is provided with a second optical system or the like.

Further, according to the present embodiment, even if the relative positional relationship of the lens body 12N with respect to the light source 14 deviates from the design value due to the influence of the assembly error or the like, the mid light distribution pattern P _MID (
It is possible to suppress the occurrence of glare in P _{MID_L} , P _{MID_R} ). This is because the second optical system forming the mid light distribution pattern P _MID (P _{MID_L} , P _{MID_R} ) _includes a pair of left and right second lower reflecting surfaces 48a and 48b (and shades 48c and 48d). Is.

Further, according to the present embodiment, even if the relative positional relationship of the lens body 12N with respect to the light source 14 deviates from the design value due to the influence of the assembly error or the like, and the wide light distribution pattern P _WIDE moves vertically upward. , Glare can be suppressed. This is because the wide light distribution pattern P _WIDE is formed as a light distribution pattern having a shape in which the vicinity of the center of the upper end edge is recessed downward. In order to obtain this effect, at least a third optical system may be provided, and the first optical system and / or the second optical system can be omitted as appropriate.

Next, a modified example of the lens body 12N will be described. In this modification, the upper surface 44c of the tenth embodiment is used instead of the upper surface 44Nc, and the second exit surface 12A2b of the tenth embodiment is further used.
It corresponds to the lens body 12N to which (extension area 12A2b4) is added.

In this modification, as shown in FIG. 49 (c), the upper incident surface 42c, the upper surface 44c, and the second exit surface 12A2b (extension region 12A2b4) are incident on the inside of the lens body 12N from the upper incident surface 42c and the upper surface 44c. The light Ray _WIDE from the light source 14 reflected on the inner surface of the second exit surface 12A2
As shown in FIG. 71 (e), the spot light distribution pattern P _SPOT and the mid light distribution patterns P _{MID_L} and P _{MID_R} are emitted from b (extended region 12A2b4) and irradiated forward.
It constitutes a third optical system that forms a wide light distribution pattern P _WIDE that is superimposed on the mid light distribution pattern P _{MID_L} and P _{MID_R} .

The surface shape of the upper incident surface 42c and / or the upper surface 44c is configured so that a wide light distribution pattern P _WIDE having a shape including a concave portion in the vicinity of the center of the upper end edge is recessed downward is formed.
For example, the region near the center in the left-right direction is radiated downward from the regions on both the left and right sides of the upper surface 44c so that the reflected light from the region near the center in the left-right direction is irradiated downward. Tilt down (or dent). As a result, as shown in FIG. 71 (e), it is possible to form a wide light distribution pattern P _WIDE having a shape in which the vicinity of the center of the upper end edge is recessed downward.

The same effect as that of the twelfth embodiment can be obtained by this modification as well.

Next, as the thirteenth embodiment, the vehicle lamp 60 (which forms a high beam light distribution pattern) (
The lens body 62) will be described with reference to the drawings.

79 (a) is a vertical sectional view of the vehicle lamp 60 (lens body 62), and FIG. 79 (b) is a front view. FIG. 80 (a) is an example of the high beam light distribution pattern P _Hi (composite light distribution pattern) formed by the vehicle lamp 60 (lens body 62), and is shown in FIGS. 80 (b) and 80 (c). It is formed by superimposing the light distribution patterns P _{Hi_SPOT} and P _{Hi_WIDE on} each part. The spot light distribution pattern P _{Hi_SPOT} corresponds to the light collection pattern of the present invention, and the wide light distribution pattern P _{Hi_WIDE} corresponds to the diffusion pattern of the present invention.

As shown in FIG. 79, the vehicle lighting fixture 60 of the present embodiment includes a light source 14, a lens body 62 arranged in front of the light source 14, and a virtual vertical screen facing the front of the vehicle (about 25 m from the front of the vehicle). The high beam light distribution pattern P shown in FIG. 80 (a) is placed on the front).
Form _Hi .

The light source 14 is arranged near the rear end portion 62a of the lens body 62 (near the reference point F _{62 in the} optical design) with its light emitting surface facing forward. Optical axis AX ₁₄ of the light source 14 may be coincident with the reference axis AX ₆₂ extending in the longitudinal direction of the vehicle, it may be inclined with respect to the reference axis AX _62.

The lens body 62 is a lens body arranged in front of the light source 14, and includes a rear end portion 62a and a front end portion 62b, and light from the light source 14 incident on the inside of the lens body 62 is emitted from the front end portion 62b (for wide). Emission surface 62b1 for light distribution pattern and exit surface 62b2 for spot light distribution pattern)
It is configured as a lens body that forms the high beam light distribution pattern P _Hi shown in FIG. 80 (a) by being emitted from the lens and irradiated forward. The lens body 62 is integrally molded (by injection molding) by injecting a transparent resin such as polycarbonate or acrylic, cooling and solidifying the lens body 62.

Lens body 62, a first optical system for forming a spot light distribution pattern P _{Hi_SPOT} than diffuse wide light distribution pattern P _{Hi_WIDE} (see FIG. 80 (b)), and the spot light distribution pattern P _{Hi_SPOT} (Figure 80 It includes a second optical system that forms (see (c)).

The rear end portion 62a of the lens body 62 internally reflects (totally reflects) the light from the incident surface A for the wide light distribution pattern and the light source 14 incident on the inside of the lens body 62 from the incident surface A for the wide light distribution pattern. ) Light from the reflecting surface 62a3 for the wide light distribution pattern, the incident surface 62a5 for the spot light distribution pattern, and the light source 14 incident on the inside of the lens body 62 from the incident surface 62a5 for the spot light distribution pattern. A reflecting surface 62a6 for a spot light distribution pattern that reflects on the inner surface is included.

As shown in FIG. 79 (a), the incident surface A for the wide light distribution pattern extends rearward from the outer peripheral edge of the first incident surface 62a1 and the first incident surface 62a1 that are convex toward the light source 14. The space between the light source 14 and the first incident surface 62a1 includes a tubular second incident surface 62a2 that surrounds a range other than the notch 62a4 through which the light from the light source 14 passes.

The reflection surface 62a3 for the wide light distribution pattern is arranged outside the second incident surface 62a2.
It is a reflecting surface that internally reflects (totally reflects) the light from the light source 14 incident on the inside of the lens body 62 from the second incident surface 62a2.

FIG. 81A shows the rear end portion 62a of the lens body 62 (first incident surface 62a1, second incident surface 62).
It is a front view of a2 and the reflection surface 62a3 for the wide light distribution pattern).

Of the space between the light source 14 and the first incident surface 62a1, the range of the angle θ1 shown in FIG. 81 (a) is surrounded by the second incident surface 62a2 (and the reflecting surface 62a3 for the wide light distribution pattern). However, the range of the angle θ2 is not surrounded by the second incident surface 62a2 (and the reflecting surface 62a3 for the wide light distribution pattern), and the fan-shaped notch 62a through which the light from the light source 14 passes is not surrounded.
It constitutes 4.

As shown in FIG. 82, the range of the angle θ2 is surrounded by the second incident surface 62a2 (and the reflecting surface 62a3 for the wide light distribution pattern) having a relatively short dimension in the reference axis AX ₆₂ direction. May be good.

As shown in FIG. 79 (a), the incident surface 62a5 for the spot light distribution pattern is concavely incident toward the light source 14 in which the light from the light source 14 that has passed through the notch 62a4 is incident inside the lens body 62. It is a face.

The reflecting surface 62a6 for the spot light distribution pattern is an incident surface 6 for the spot light distribution pattern.
Arranged outside 2a5, from the incident surface 62a5 for the spot light distribution pattern to the lens body 62
It is a reflecting surface that internally reflects (totally reflects) the light from the light source 14 incident inside.

The front end portion 62b of the lens body 62 includes an emission surface 62b1 for a wide light distribution pattern and an emission surface 62b2 for a spot light distribution pattern arranged below the emission surface 62b1.

The first optical system that forms the wide light distribution pattern P _{Hi_WIDE} (see FIG. _80B ) is configured as follows.

As shown in FIG. 79 (a), the incident surface A (first incident surface 62a1) for the wide light distribution pattern.
The second incident surface 62a2), the reflecting surface 62a3 for the wide light distribution pattern, and the exit surface 62b1 for the wide light distribution pattern are the incident surface A (first incident surface 6) for the wide light distribution pattern.
The light from the light source 14 incident on the inside of the lens body 62 from 2a1 and the second incident surface 62a2)
It constitutes a first optical system that _emits light from an exit surface 62b1 for a wide light distribution pattern and is irradiated forward to form a wide light distribution pattern P _{Hi_WIDE} .

Specifically, the first incident surface 62a1, the second incident surface 62a2, the reflecting surface 62a3 for the wide light distribution pattern, and the exit surface 62b1 for the wide light distribution pattern are lens bodies from the first incident surface 62a. Light from the light source 14 incident on the inside of the 62, and light from the light source 14 incident on the inside of the lens body 62 from the second incident surface 62a and internally reflected (totally reflected) by the reflecting surface 62a3 for the wide light distribution pattern. Light is emitted from the exit surface 62b1 for the wide light distribution pattern and is irradiated forward to form the wide light distribution pattern P _{Hi_WIDE} .

The emission surface 62b1 for the wide light distribution pattern is configured as a semi-cylindrical surface (cylindrical surface) in which the cylindrical axis extends in the horizontal direction (direction orthogonal to the inner paper surface in FIG. 79 (a)). The focused line of the emission surface 62b1 for the wide light distribution pattern extends in the horizontal direction (direction orthogonal to the _inner paper surface in FIG. 79 (a)) at the position indicated by reference numeral F _62b1 in FIG. 79 (a). Of course, the present invention is not limited to this, and the exit surface 62b1 for the wide light distribution pattern may be configured as a semi-cylindrical surface (cylindrical surface) provided with a slant angle and / or a camber angle.

The first incident surface 62a1 is a surface on which light from the light source 14 is refracted and incident on the inside of the lens body 62, and is configured as a curved surface (for example, a free curved surface) that is convex toward the light source 14. Specifically, in the first incident surface 62a1, the light from the light source 14 incident on the inside of the lens body 62 from the first incident surface 62a1 is the focused line of the exit surface 62b1 for the wide light distribution pattern in the vertical direction. _{Condenses in the} vicinity of F _62b1 (see FIG. 79 (a)) and diffuses in the horizontal direction (FIG. 8).
The surface shape is configured as (or collimated) as in 3 (a)).

The second incident surface 62a2 is a surface in which light that is not incident on the first incident surface 62a1 among the light from the light source 14 is refracted and incident on the inside of the lens body 62. It is configured as a tubular surface (for example, a free curved surface) that extends and surrounds a range other than the notch 62a4 through which the light from the light source 14 passes in the space between the light source 14 and the first incident surface 62a1. There is.

The reflection surface 62a3 for the wide light distribution pattern is arranged outside the second incident surface 62a2.
It is configured as a surface that internally reflects (totally reflects) the light from the light source 14 incident on the inside of the lens body 62 from the second incident surface 62a2. The reflecting surface 62a3 for the wide light distribution pattern is a reflecting surface that internally reflects (totally reflects) the light from the light source 14 incident on the inside of the lens body 62 from the second incident surface 62a2, and does not use metal vapor deposition. Specifically, the reflective surface 6 for the wide light distribution pattern
In 2a3, the light from the light source 14 which is incident on the inside of the lens body 62 from the second incident surface 62a2 and is internally reflected (totally reflected) by the reflecting surface 62a3 for the wide light distribution pattern is used for wide in the vertical direction. The light is focused (or collimated) in the vicinity of the focused line F _{62b1 on} the exit surface 62b1 for the light distribution pattern (see FIG. 79 (a)) and diffused in the horizontal direction (see FIG. 83 (a)). The surface shape is configured.

The wide light distribution pattern P _{Hi_WIDE} shown in FIG. 80 (b) is formed on the virtual vertical screen by the first optical system having the above configuration.

That is, the light from the light source 14 incident on the inside of the lens body 62 from the first incident surface 62a1 and the light incident on the inside of the lens body 62 from the second incident surface 62a2 are internally reflected by the reflecting surface 62a3 for the wide light distribution pattern. The light from the (total reflection) light source 14 is _{focused in the} vicinity of the _{focused line} F _{62b1 on} the exit surface 62b1 for the wide light distribution pattern in the vertical direction (see FIG. 79 (a)), and then is collected.
The light is emitted from the exit surface 62b1 for the wide light distribution pattern. At that time, the light emitted from the light source 14 emitted from the emission surface 62b1 for the wide light distribution pattern is collected in the vertical direction by the action of the emission surface 62b1 for the wide light distribution pattern, and is focused on the reference axis AX ₆₂ . The wide light distribution pattern P _{Hi_WIDE} shown in FIG. 80 (b) is formed by irradiating the light forward as light that is parallel to the light and diffused in the horizontal direction.

The second optical system that forms the spot light distribution pattern P _{Hi_SPOT} (see FIG. 80 (c)) is configured as follows.

As shown in FIG. 79 (a), the incident surface 62a5 for the spot light distribution pattern, the reflecting surface 62a6 for the spot light distribution pattern, and the exit surface 62b2 for the spot light distribution pattern are spot light distribution. The light from the light source 14 that is incident on the inside of the lens body 62 from the incident surface 62a5 for the pattern and is internally reflected by the reflecting surface 62a6 for the spot light distribution pattern is emitted from the exit surface 62b2 for the spot light distribution pattern. , Light distribution pattern P for spots illuminated forward
_It constitutes the second optical system that forms _{Hi_SPOT} .

Specifically, the incident surface 62a5 for the spot light distribution pattern, the reflecting surface 62a6 for the spot light distribution pattern, and the exit surface 62b2 for the spot light distribution pattern are notched portions 6.
A light source 14 that has passed through 2a4, is incident on the inside of the lens body 62 from the incident surface 62a5 for the spot light distribution pattern, and is internally reflected (totally reflected) by the reflecting surface 62a6 for the spot light distribution pattern.
Light is emitted from the exit surface 62b2 for the spot light distribution pattern and is irradiated forward to form the spot light distribution pattern P _{Hi_SPOT} .

The emission surface 62b2 for the spot light distribution pattern is configured as a planar surface orthogonal to the reference axis AX ₆₂ . Of course, not limited to this, the exit surface 6 for the spot light distribution pattern
2b2 may be configured as a curved surface. Further, as shown in FIG. 84, the exit surface 62b2 for the spot light distribution pattern may be configured as a plane or curved surface continuous with the lower end edge of the exit surface 62b1 for the wide light distribution pattern. Good.

The exit surface 62b2 for the spot light distribution pattern is the exit surface 62 for the wide light distribution pattern.
It is located behind b1 (see FIG. 79 (a)). Of course, not limited to this
The exit surface 62b2 for the spot light distribution pattern is the exit surface 62b for the wide light distribution pattern.
It may be arranged at a position ahead of 1 or at the same position as the exit surface 62b1 for the wide light distribution pattern.

The incident surface 62a5 for the spot light distribution pattern is a surface on which the light from the light source 14 is incident inside the lens body 62, and is configured as a curved surface having a concave shape toward the light source 14. Specifically, the incident surface 62a5 for the spot light distribution pattern is the light source 14 (to be exact, the reference point F ₆₂ ).
It is configured as a spherical surface centered on. As a result, the Fresnel reflection loss when the light from the light source 14 is incident on the inside of the lens body 62 from the incident surface 62a5 for the spot light distribution pattern can be suppressed. Of course, the present invention is not limited to this, and the incident surface 62a5 for the spot light distribution pattern may be configured as a surface (for example, a free curved surface) other than the spherical surface centered on the light source 14.

The reflecting surface 62a6 for the spot light distribution pattern is an incident surface 6 for the spot light distribution pattern.
Arranged outside 2a5, from the incident surface 62a5 for the spot light distribution pattern to the lens body 62
It is configured as a surface that internally reflects (totally reflects) the light from the light source 14 incident inside. The reflection surface 62a6 for the spot light distribution pattern is an incident surface 62a for the spot light distribution pattern.
It is a reflecting surface that internally reflects (totally reflects) the light from the light source 14 incident on the inside of the lens body 62 from No. 5, and does not use metal vapor deposition. Specifically, the reflection surface 62a6 for the spot light distribution pattern is incident on the inside of the lens body 62 from the incident surface 62a5 for the spot light distribution pattern and is internally reflected by the reflection surface 62a6 for the spot light distribution pattern. The light from the light source 14 that is (totally reflected) and emitted from the exit surface 62b2 for the spot light distribution pattern is collimated in the vertical direction (see FIG. 79 (a)) and also in the horizontal direction. (Fig. 83 (b)
(See), the surface shape is configured. Reflective surface 62a for spot light distribution pattern
As 6, for example, a reflecting surface of a rotating paraboloid system whose focal point is set near the light source 14 (to be exact, the reference point F ₆₂ ) can be used.

The spot light distribution pattern P _{Hi_SPOT} shown in FIG. _80C is formed on the virtual vertical screen by the second optical system having the above configuration.

That is, the incident surface 62a5 for the spot light distribution pattern passes through the notch 62a4.
The light from the light source 14 that is incident on the inside of the lens body 62 and is internally reflected (totally reflected) by the reflecting surface 62a6 for the spot light distribution pattern is collimated in the vertical and horizontal directions and then arranged for the spot. It emits light from the exit surface 62b2 for the light pattern. At that time, the light emitted from the light source 14 emitted from the emission surface 62b2 for the spot light distribution pattern is configured as a plane having a plane shape in which the emission surface 62b2 for the spot light distribution pattern is orthogonal to the reference axis AX ₆₂ . For,
The spot light distribution pattern P _{Hi_SPOT} shown in FIG. 80 (c) is formed by irradiating the light forward as light parallel to the reference axis AX _{62 in the} vertical direction and the horizontal direction.

The spot light distribution pattern P _{Hi_SPOT} has a higher light intensity than the wide light distribution pattern P _{Hi_WIDE} . As a result, the high beam light distribution pattern P _Hi () formed by superimposing the spot light distribution pattern P _{Hi_SPOT} and the wide light distribution pattern P _{Hi_WIDE.}
The composite light distribution pattern) has a high central luminous intensity and excellent distant visibility.

The becomes light distribution pattern P _{Hi_SPOT} spot is focused from the light distribution pattern P _{Hi_WIDE} for wide is parallel to the reference axis AX ₆₂ wide light distribution pattern P _{Hi_WIDE} is relates vertical direction, the horizontal direction This is because the spot light distribution pattern P _{Hi_SPOT} is formed by light parallel to the reference axis AX _{62 in the} vertical direction and the horizontal direction, whereas it is formed by the diffused light.

The intensity of the light distribution pattern P _{Hi_SPOT} spot is higher than the light distribution pattern P _{Hi_WIDE} for the wide, the light source 14 and the reflective surface 62a6 of the light distribution pattern for spots (and / or the incident surface of the light distribution pattern for spot 62a5 ) Is set longer than the distance between the light source 14 and the reflecting surface 62a3 (and / or the incident surfaces 62a1, 62a2 for the wide light distribution pattern) for the wide light distribution pattern. _Therefore , in the second optical system forming the spot light distribution pattern P _{Hi_SPOT} , the light source image of the light source 14 is relatively smaller than that in the first optical system forming the wide light distribution pattern P _{Hi_WIDE} . This is because the spot light distribution pattern P _{Hi_SPOT} is formed by this relatively small light source image.

That is, as shown in FIG. 79 (a), the light source 14 and the reflecting surface 6 for the wide light distribution pattern
In the first optical system in which the distance W between 2a3 and 2a3 is relatively short, the light source image of the light source 14 becomes large, so that it is suitable for the wide light distribution pattern P _{Hi_WIDE} . On the other hand, in the second optical system in which the distance S between the light source 14 and the reflecting surface 62a6 for the spot light distribution pattern is relatively long,
Since the light source image of the light source 14 becomes small, it is suitable for the spot light distribution pattern P _{Hi_SPOT} .

By adjusting the angles θ1 and θ2 shown in FIG. _81A , the balance between the luminous intensity of the spot light distribution pattern P _{Hi_SPOT and} the luminous intensity of the wide light distribution pattern P _{Hi_WIDE} can be adjusted.

As shown in FIG. 85, the lens body 62 of the present embodiment can be used upside down.

According to this embodiment, the following effects can be achieved.

That is, one spot light distribution pattern P _{Hi_SPOT} and a wide light distribution pattern P _{Hi_WI}
It is possible to provide a lens body 62 capable of forming a high beam light distribution pattern P _Hi (composite light distribution pattern) on which _DE is superimposed.

This is because one lens body 62 _includes a first optical system that forms the wide light distribution pattern P _{Hi_WIDE} and a second optical system that forms the spot light distribution pattern P _{Hi_SPOT} .

Further, according to the present embodiment, as a _{result that} the luminous intensity of the spot light distribution pattern P _{Hi_SPOT} is higher than that of the wide light distribution pattern P _{Hi_WIDE} , the spot light distribution pattern P _{Hi_SPOT} and the wide light distribution pattern P _{Hi_WIDE} are superimposed. The high beam light distribution pattern P _Hi (composite light distribution pattern) formed by this can be made to have a high central luminous intensity and excellent distant visibility.

The intensity of the light distribution pattern P _{Hi_SPOT} spot is higher than the light distribution pattern P _{Hi_WIDE} for the wide, the light source 14 and the reflective surface 62a6 of the light distribution pattern for spots (and / or the incident surface of the light distribution pattern for spot 62a5 ) Is set longer than the distance between the light source 14 and the reflecting surface 62a3 (and / or the incident surfaces 62a1, 62a2 for the wide light distribution pattern) for the wide light distribution pattern. _Therefore , in the second optical system forming the spot light distribution pattern P _{Hi_SPOT} , the light source image of the light source 14 is relatively smaller than that in the first optical system forming the wide light distribution pattern P _{Hi_WIDE} . This is because the spot light distribution pattern P _{Hi_SPOT} is formed by this relatively small light source image.

Next, the lens body 62A, which is a modification of the lens body 62, will be described.

FIG. 86 is a vertical cross-sectional view of the lens body 62A.

In the lens body 62A of this modification, the exit surface 62b1 for the wide light distribution pattern is
It is configured as a plane-shaped surface.

Further, in the first incident surface 62a1, the light from the light source 14 that is incident on the inside of the lens body 62A from the first incident surface 62a1 and emitted from the exit surface 62Ab1 for the wide light distribution pattern is collimated in the vertical direction. Moreover, the surface shape is configured so as to diffuse in the horizontal direction. Further, the reflecting surface 62a3 for the wide light distribution pattern is incident on the inside of the lens body 62A from the second incident surface 62a and internally reflected (totally reflected) by the reflecting surface 62a3 for the wide light distribution pattern, and is used for wide. The surface shape is configured so that the light emitted from the light source 14 emitted from the exit surface 62a1 for the light distribution pattern is collimated in the vertical direction and diffused in the horizontal direction. Other than that, it has the same configuration as the lens body 62 of the thirteenth embodiment.

The lens body 62A of the present modification can also achieve the same effect as that of the thirteenth embodiment.

Next, the lens body 62B, which is a modification of the lens body 62, will be described.

FIG. 87 is a vertical cross-sectional view of the rear end portion 62a of the lens body 62B.

In the lens body 62B of this modification, the first incident surface 62a1 is omitted. That is, the incident surface A for the wide light distribution pattern is composed of only the second incident surface 62a. Other than that, it has the same configuration as the lens body 62 of the thirteenth embodiment.

The lens body 62B of this modification can also achieve the same effect as that of the thirteenth embodiment.

Next, as the 14th embodiment, the vehicle lamp 70 (lens body 72) forming the low beam light distribution pattern or the high beam light distribution pattern will be described with reference to the drawings.

The vehicle lighting fixture 70 (lens body 72) of the present embodiment is configured as follows.

FIG. 88 (a) is a perspective view of the vehicle lamp 70 (lens body 72) viewed from diagonally forward and downward, FIG.
8 (b) is a perspective view of the vehicle lamp 70 (lens body 72) viewed from diagonally above and rearward. FIG. 8
9 (a) is a top view, FIG. 89 (b) is a front view, and FIG. 89 (c) is a side view. FIG. 90 is an exploded perspective view of the vehicle lamp 70 (lens body 72).

As shown in FIGS. 88 to 90, the vehicle lighting fixture 70 (lens body 72) of the present embodiment includes two vehicle lighting fixtures 10N (lens body 12N) of the twelfth embodiment and one vehicle of the thirteenth embodiment. It corresponds to the one provided with the lighting tool 60 (lens body 62).

Hereinafter, one lens body 12N is referred to as the first lens portion 12N _Lo1 (the first lens for the low beam of the present invention).
The other lens body 12N is referred to as a second lens unit 12N _Lo2 (corresponding to the second lens unit for the low beam of the present invention), and the lens body 62 is referred to as a third lens unit 62 _Hi (corresponding to the lens unit). Corresponds to the third lens part for the high beam).

The lens body 72 (12N _Lo1 , 12N _Lo2 , 62 _Hi ) is integrally molded (by injection molding) by injecting a transparent resin such as polycarbonate or acrylic, cooling and solidifying. That is, the respective lens portions 12N _Lo1 , 12N _Lo2 , and 62 _Hi are integrally molded so as to be connected to each other without interposing an interface.

The first and second lens portions 12N _Lo1 and 12N _Lo2 have the same configuration as the lens body 12N shown in FIG. 70. That is, the first and second lens portions 12N _Lo1 and 12N _Lo2 are arranged in front of the first light source 14 _Lo1 for the low beam and the second light source 14 _Lo2 for the low beam, as shown in FIG. _89A and the like. The lens portion, the rear end portion 12A1aa and the front end portion 12A2b, respectively.
Each light source 14 _Lo1 , 1 incident on the inside of each lens unit 12N _Lo1 and 12N _Lo2 including b.
_Light from 4 _Lo2 is emitted from the front end 12A2bb (second exit surface 12A2b) of the respective lens portions 12N _Lo1 and 12N _Lo2 and is irradiated forward, so that the light distribution for low beam including the cut-off line is included in the upper end edge. It is configured as a lens portion that forms a pattern P _Lo (see FIG. 71 (a)).

Region AA1 surrounded by a chain line in FIG. 89 (b), the light from the first light source 14 _Lo1 and the second light source 14 _Lo2 which forms a low beam light distribution pattern P _Lo (see FIG. 71 (a)) is emitted Indicates the area to be used.

The rear end portions 12A1aa of the first and second lens portions 12N _Lo1 and 12N _{Lo2 have} a cone shape from the front end portion 12A2bb side of the respective lens portions 12N _Lo1 and 12N _Lo2 toward the tip end side of the rear end portion 12A1aa, respectively. It includes a cone portion (see the portion including the pair of left and right side surfaces 44a and 44b in FIG. 89 (a)) that narrows in a bell shape).

As shown in FIGS. 89 (b) and 89 (c), the first and second lens portions 12N _Lo1 and 12N _Lo2 are arranged in parallel in a direction inclined with respect to the horizontal, and in FIG. 89 (a). As shown, the first
A space is formed between the cone portion of the lens portion 12N _Lo1 (corresponding to the first cone portion of the present invention) and the cone portion of the second lens body 12N _Lo2 (corresponding to the second cone portion of the present invention). They are connected to each other in the state of being connected. Of course, the present invention is not limited to this, and the first lens unit 12N _Lo1 and the second lens unit 12N _Lo2 may be arranged in parallel in the horizontal direction and connected to each other.

The first and second lens units 12N _Lo1 and 12N _Lo2 have optical functions in the first lens unit 12N _{Lo1 where} the optical function is not intended (for example, the left side) and in the second lens unit 12N _Lo2. An unintended location (eg, the right side) is connected (see FIG. 88 (b)).

The front end portions 12A2bb of the first and second lens portions 12N _Lo1 and 12N _Lo2 include a semi-cylindrical exit surface (second exit surface 12A2b) provided with a slant angle and / or a camber angle. Of course, not limited to this, the front end portion 12 of the first and second lens portions 12N _Lo1 and 12N _Lo2.
A2bb may include a semi-cylindrical exit surface (second exit surface 12A2b) having a cylindrical axis extending in the horizontal direction.

The low beam light distribution pattern is a low beam light distribution pattern P formed by the respective lens portions 12N _Lo1 and 12N _Lo2 by turning on the first light source 14 _Lo1 for the low beam and the second light source 14 _Lo2 for the low beam. _Lo (see FIG. 71 (a)) is formed as a superposed synthetic light distribution pattern.

The third lens portion 62 _Hi has the same configuration as the lens body 62 shown in FIG. 79 (a). However,
The front end of the third lens unit 62 _Hi, unlike the lens body 62 shown in FIG. 79 (a), after the rear end 12A1aa and the second lens unit 12N _Lo2 of the first and second lens portions 12N _Lo1, 12N _Lo2 It is connected to the end 12A1aa (see FIG. 88 (b)). Other than that, the third lens unit 62
_Hi has the same configuration as the lens body 62 shown in FIG. 79 (a).

As shown in FIG. 89A and the like, the third lens unit 62 _Hi is a third light source 14 _Hi for a high beam.
A third light source 14 incident on the inside of the third lens portion 62 _Hi , which is a lens portion arranged in front of the third lens portion 62 _Hi.
The light from _Hi is the front end 12A2bb (second) of the first and second lens portions 12N _Lo1 and 12N _Lo2 .
By emitting from the exit surface 12A2b) and irradiating forward, FIGS. 91 (a) and 91 (Fig. 91)
It is configured as a lens body that forms a high beam light distribution pattern P _Hi (composite light distribution pattern) in which the light distribution patterns P _{Hi_SPOT} and P _{Hi_WIDE} shown in b) are superimposed.

The region AA2 surrounded by the alternate long and _short dash line in FIG. 89 (b) is the region where the light from the third light source 14 _Hi forming the wide light distribution pattern P _{Hi_WIDE} for the high beam (see FIG. 91 (a)) is emitted. Is shown. The region AA3 surrounded by the solid line in FIG. 89 (b) indicates the region where the light emitted from the third light source 14 _Hi forming the spot light distribution pattern P _{Hi_SPOT} (see FIG. 91 (b)) for the high beam is emitted. ing.

As shown in FIG. 88 (b), at least a part of the third lens portion 62 _Hi is in the space between the cone portion of the first lens portion 12N _{Lo1 and} the cone portion of the second lens portion 12N _Lo2. In the arranged state, the rear end portion 12A1aa of the first lens portion 12N _{Lo1 and} the rear end portion 12A1aa of the second lens portion 12N _{Lo2 where} the optical function is not intended (for example, the first lens portion 12N _Lo).
At the connecting portion between the rear end portion 12A1aa of _{1 and} the rear end portion 12A1aa of the second lens portion 12N _Lo2 ),
They are connected to each cone portion (particularly, a pair of left and right side surfaces 44a and 44b) so as not to interfere with each other.

FIG. 92 is a perspective view of the third lens portion 62 _Hi as viewed from diagonally above and rearward. FIG. 93 is a vertical cross-sectional view (schematic view) of the lens body 72.

As shown in FIGS. 92 and 93, the rear end portion 62a of the third lens portion 62 _Hi has the same configuration as the lens body 62 shown in FIG. 79 (a). That is, the rear end portion 62a of the third lens unit 62 _Hi is the third light source which enters incident surface A of the light distribution pattern for wide, from the incident surface A of the light distribution pattern for the wide inside the third lens unit 62 _Hi 14 Reflecting surface 62a3 for wide light distribution pattern that reflects light from _Hi internally, incident surface 62a5 for spot light distribution pattern, and incident surface 62a5 for spot light distribution pattern to third lens unit 62 _Hi It includes a reflecting surface 62a6 for a spot light distribution pattern that internally reflects light from a third light source 14 _Hi incident inside.

The incident surface A for the wide light distribution pattern is the first incident surface 62 that is convex toward the third light source 14 _Hi.
a1, a notch extending rearward from the outer peripheral edge of the first incident surface 62a1 and through which light from the third light source 14 _Hi passes in the space between the third light source 14 _Hi and the first incident surface 62a1. Part 62a
It includes a tubular second incident surface 62a2 that surrounds a range other than 4.

The reflection surface 62a3 for the wide light distribution pattern is arranged outside the second incident surface 62a2.
It is a reflecting surface that internally reflects the light from the third light source 14 _Hi incident on the inside of the third lens portion 62 _Hi from the second incident surface 62a2.

As shown in FIGS. 88 (b) and 92, the incident surface A (first incident surface 62a1 and second incident surface 62a2) for the wide light distribution pattern and the reflecting surface 62a3 for the wide light distribution pattern are 1 _Rear end 12A1aa of lens part 12N _Lo1 and rear end 12A1 of 2nd lens part 12N _Lo2
It is arranged at the tip of the extension portion 62a7 extending rearward from the portion where the aa is connected.

Incidentally, omitted extensions 62A7, the portion near the rear end 12A1aa are connected at the rear end 12A1aa and the second lens unit 12N _Lo2 of the first lens unit 12N _Lo1, incident plane A of the light distribution pattern for the wide (The first incident surface 62a1 and the second incident surface 62a2) and the reflecting surface 62a3 for the wide light distribution pattern can also be arranged (the cone portion of the first lens portion 12N _{Lo1 and} the cone portion of the second lens portion 12N _Lo2 ). When the third light source 14 _Hi and the substrate on which it is mounted can be placed in the space between the body and the body).

Of the space between the third light source 14 _Hi and the first incident surface 62a1, the range of the angle θ1 similar to that shown in FIG. 81 (a) is the reflection of the second incident surface 62a2 (and the wide light distribution pattern). Surface 62a
Although it is surrounded by 3), the range of the angle θ2 is not surrounded by the second incident surface 62a2 (and the reflecting surface 62a3 for the wide light distribution pattern), and the light from the third light source 14 _Hi passes through. It constitutes a fan-shaped notch 62a4. As shown in FIG. 82, the range of the angle θ2 is surrounded by the second incident surface 62a2 (and the reflecting surface 62a3 for the wide light distribution pattern) having a relatively short dimension in the reference axis AX _62Hi direction. You may be.

The incident surface 62a5 for the spot light distribution pattern is an incident surface that is concave toward the third light source 14 _{Hi in} which light from the third light source 14 _Hi that has passed through the notch portion 62a4 is incident inside the third lens portion 62 _Hi. Is.

The reflecting surface 62a6 for the spot light distribution pattern is an incident surface 6 for the spot light distribution pattern.
It is a reflecting surface that is arranged outside 2a5 and internally reflects the light from the third light source 14 _Hi that is incident on the inside of the third lens portion 62 _Hi from the incident surface 62a5 for the spot light distribution pattern.

As shown in FIGS. 89 (b) and 89 (c), the front end portion of the third lens portion 62 _{Hi is} the front end portion 12A2bb (semi-cylindrical exit surface) of the first and second lens portions 12N _Lo1 and 12N _Lo2. 12A2b
) Is included, the exit surface 62b2 for the spot light distribution pattern is included.

The first optical system that forms the wide light distribution pattern P _{Hi_WIDE} (see FIG. 91 (a)) is configured as follows.

As shown in FIGS. 92 to 94, the incident surface A for the wide light distribution pattern (first incident surface 62a).
1 and 2 incident surfaces 62a2), reflective surfaces 62a3 for wide light distribution pattern, 1st and 2nd
The front end portions 12A2bb (semi-cylindrical exit surface 12A2b) of the lens portions 12N _Lo1 and 12N _Lo2 are formed from the incident surface A (first incident surface 62a1 and second incident surface 62a2) for the wide light distribution pattern to the third lens portion. 62 _Hi light Ray _{Hi_WIDE} from the third light source 14 _Hi incident therein, a front end 12A2bb (semicylindrical exit surface of the first and second lens portions 12N _Lo1, 12N _Lo2 12A2
It constitutes a first optical system that emits light from b) and is irradiated forward to form a wide light distribution pattern P _{Hi_WIDE} (see FIG. 91 (a)) for a high beam.

The first incident surface 62a1 is a surface on which light from the third light source 14 _Hi is refracted and incident on the inside of the third lens portion 62 _Hi , and is a curved surface (for example, free) that is convex toward the third light source 14 _Hi. It is configured as a curved surface). Specifically, the first incident surface 62a1 is a third from the first incident surface 62a1.
The light Ray _{Hi_WIDE} from the third light source 14 _Hi incident on the inside of the lens portion 62 _Hi is the front end portion 12A2bb (semi-cylindrical exit surface 12A2b) of the first and second lens portions 12N _Lo1 and 12N _{Lo2 in} the vertical direction. _Focuses near the focused line F _12A2b (see FIGS. 93 and 94 (a)) and diffuses in the horizontal direction (see FIG. 94 (b)) (or collimates).
, Its surface shape is configured.

The second incident surface 62a2 is a surface of the light from the third light source 14 _{Hi that} is refracted by the light Ray _{Hi_WIDE that} is not incident on the first incident surface 62a1 and is incident on the inside of the third lens portion 62 _Hi.
In the space between the third light source 14 _Hi and the first incident surface 62a1 extending rearward from the outer peripheral edge of a1, other than the notch _62a4 through which the light Ray _{Hi_SPOT} from the third light source 14 _Hi passes. It is configured as a tubular surface (eg, a free curved surface) that surrounds the area.

The reflection surface 62a3 for the wide light distribution pattern is arranged outside the second incident surface 62a2.
Light Ra from the third light source 14 _Hi incident on the inside of the third lens portion 62 _Hi from the second incident surface 62a2.
y _{Hi_WIDE} is configured as a surface that reflects internally (total internal reflection). The reflection surface 62a3 for the wide light distribution pattern is a reflection surface that internally reflects (totally reflects) the light Ray _{Hi_WIDE} from the third light source 14 _Hi incident on the inside of the third lens portion 62 _Hi from the second incident surface 62a2. No metal deposition is used. Specifically, the reflecting surface 62a3 for the wide light distribution pattern is the second incident surface 62a2.
The light Ray _{Hi_WIDE} from the third light source 14 _Hi, which is incident on the inside of the third lens portion 62 _{Hi and} internally reflected (totally reflected) by the reflection surface 62a3 for the wide light distribution pattern, is in the vertical direction.
_Front end 12A2bb (semi-cylindrical exit surface 1) of the first and second lens portions 12N _Lo1 and 12N _Lo2
2A2b) _Condensed near the focused line F _12A2b (see FIGS. 93 and 94 (a)) and diffused in the horizontal direction (see FIG. 94 (b)) (or collimated). ), The surface shape is configured.

The wide light distribution pattern P _{Hi_WIDE} shown in FIG. _91A is formed on the virtual vertical screen by the first optical system having the above configuration.

That is, the third light source 14 _Hi incident on the inside of the third lens portion 62 _Hi from the first incident surface 62a1.
Light from Ray _{Hi_WIDE} , and the third light source 14 that is incident on the inside of the third lens portion 62 _Hi from the second incident surface 62a2 and internally reflected (totally reflected) by the reflecting surface 62a3 for the wide light distribution pattern.
The light Ray _{Hi_WIDE} from _Hi is the first and second lens units 12N _Lo1 , 12N in the vertical direction.
_{After condensing} light near the _{focused line} F _12A2b of the front end portion 12A2bb (semi-cylindrical exit surface 12A2b) of _Lo2 (see FIGS. 93 and 94 (a)), as shown in FIG. Lens body 7 from the intermediate exit surfaces (a pair of left and right exit surfaces 46a, 46b) of the second lens portions 12N _Lo1 and 12N _Lo2
2 emitted to the outside, further, the first and second lens portions incident from intermediate the entrance surface of the first and second lens portions 12N _Lo1, 12N _Lo2 (second incident surface 12A2a) inside the lens body 72 12N _Lo1
, _Of the front end portion 12A2bb (semi-cylindrical exit surface 12A2b) of 12N _Lo2 , FIG. 89 (b)
) Emits from the region AA2 surrounded by the alternate long and short dash line. At that time, the first and second lens portions 12N
_{Third Lo1} and 12N _Lo2 are emitted from the front end portion 12A2bb (semi-cylindrical exit surface 12A2b).
The light Ray _{Hi_WIDE} from the light source 14 _Hi is focused in the vertical direction by the action of the front end portions 12A2bb (semi-cylindrical exit surface 12A2b) of the first and second lens portions 12N _Lo1 and 12N _Lo2 , and is focused on the reference axis AX. _The wide light distribution pattern P _{Hi_WIDE} shown in FIG. _91A is formed by irradiating the light forward as light diffused in the horizontal direction and parallel to _62Hi .

The second optical system that forms the spot light distribution pattern P _{Hi_SPOT} (see FIG. 91 (b)) is configured as follows.

As shown in FIGS. 92 to 94, the incident surface 62a5 for the spot light distribution pattern, the reflecting surface 62a6 for the spot light distribution pattern, and the emitting surface 62b2 for the spot light distribution pattern.
Light R from the third light source 14 _Hi, which is incident on the inside of the third lens portion 62 _Hi from the incident surface 62a5 for the spot light distribution pattern and internally reflected by the reflecting surface 62a6 for the spot light distribution pattern.
The ay _{Hi_SPOT} constitutes a second optical system that emits light from the exit surface 62b2 for the spot light distribution pattern and is irradiated forward to form the spot light distribution pattern P _{Hi_SPOT} (see FIG. 91 (b)) for the high beam. are doing.

Specifically, the incident surface 62a5 for the spot light distribution pattern, the reflecting surface 62a6 for the spot light distribution pattern, and the exit surface 62b2 for the spot light distribution pattern are notched portions 6.
The third light source 14 that has passed through 2a4, is incident on the inside of the third lens portion 62 _Hi from the incident surface 62a5 for the spot light distribution pattern, and is internally reflected (totally reflected) by the reflecting surface 62a6 for the spot light distribution pattern. The second optical system in which the light Ray _{Hi_SPOT} from _Hi is emitted from the exit surface 62b2 for the spot light distribution pattern and is irradiated forward to form the spot light distribution pattern P _{Hi_SPOT} (see FIG. 91 (b)). It is configured.

The emission surface 62b2 for the spot light distribution pattern is configured as a planar surface orthogonal to the reference axis AX _62Hi . Of course, the present invention is not limited to this, and the exit surface 62b2 for the spot light distribution pattern may be configured as a curved surface.

The exit surface 62b2 for the spot light distribution pattern is the first and second lens portions 12N _Lo1 , 1
It is arranged at a position rearward from the front end portion 12A2bb (semi-cylindrical exit surface 12A2b) of 2N _Lo2 (see FIG. 93). Of course, not limited to this, the exit surface 62b2 for the spot light distribution pattern is located at a position in front of the front end portions 12A2bb (semi-cylindrical emission surface 12A2b) of the first and second lens portions 12N _Lo1 and 12N _Lo2 , or the first 1st and 2nd lens part 12N _Lo1 , 12N _Lo2
It may be arranged at the same position as the front end portion 12A2bb (semi-cylindrical exit surface 12A2b).

The incident surface 62a5 for the spot light distribution pattern is the light Ray _{Hi_SPO} from the third light source 14 _Hi.
A surface on which _T is incident on the inside of the third lens portion 62 _Hi , and is configured as a curved surface having a concave shape toward the third light source 14 _Hi . Specifically, the incident surface 62a5 for the spot light distribution pattern is
It is configured as a spherical surface centered on the third light source 14 _Hi (to be exact, the reference point F _{62 Hi} ). As a result, Fresnel reflection loss when the light Ray _{Hi_SPOT} from the third light source 14 _Hi is incident on the inside of the third lens portion 62 _Hi from the incident surface 62a5 for the spot light distribution pattern can be suppressed. Of course, not limited to this, the incident surface 62a5 for the spot light distribution pattern
May be configured as a surface (for example, a free curved surface) other than a spherical surface centered on the third light source 14 _Hi .

The reflecting surface 62a6 for the spot light distribution pattern is an incident surface 6 for the spot light distribution pattern.
It is arranged outside 2a5 and is configured as a surface that internally reflects (totally reflects) the light Ray _{Hi_SPOT} from the third light source 14 _Hi that is incident on the inside of the third lens unit 62 _Hi from the incident surface 62a5 for the spot light distribution pattern. ing. The reflection surface 62a6 for the spot light distribution pattern internally reflects the light Ray _{Hi_SPOT} from the third light source 14 _Hi incident on the inside of the third lens portion 62 _Hi from the incident surface 62a5 for the spot light distribution pattern (total reflection). No metal deposition is used on the reflective surface. Specifically, the reflection surface 62a6 for the spot light distribution pattern is incident on the inside of the third lens portion 62 _Hi from the incident surface 62a5 for the spot light distribution pattern, and the reflection surface 62a6 for the spot light distribution pattern. Internal reflection (total reflection) is performed at, and the exit surface 62b2 for the spot light distribution pattern
The light Ray _{Hi_SPOT} from the third light source 14 _Hi emitted from the light source is collimated in the vertical direction (see FIGS. 93 and 95 (a)) and also in the horizontal direction (FIG. 9).
5 (b)), the surface shape is configured. As the reflection surface 62a6 for the spot light distribution pattern, for example, a reflection surface of a rotating parabolic system in which the _focal point is set near the third light source 14 _Hi (to be exact, the reference point F _62Hi ) can be used. ..

The spot light distribution pattern P _{Hi_SPOT} shown in FIG. 91 (b) is formed on the virtual vertical screen by the second optical system having the above configuration.

That is, the incident surface 62a5 for the spot light distribution pattern passes through the notch 62a4.
The light from the third light source 14 _Hi, which is incident on the inside of the third lens portion 62 _{Hi and is} internally reflected (totally reflected) by the reflection surface 62a6 for the spot light distribution pattern, is the light Ray _{Hi_SPOT} in the vertical direction and the horizontal direction. After being collimated, the light is emitted from the exit surface 62b2 for the spot light distribution pattern. At that time, in the light Ray _{Hi_SPOT} from the third light source 14 _Hi emitted from the exit surface 62b2 for the spot light distribution pattern, the emission surface 62b2 for the spot light distribution pattern is the reference axis AX _62Hi.
Since it is configured as a plane having a planar shape orthogonal to the above, it is irradiated forward as light parallel to the reference axis AX _{62Hi in the} vertical direction and the horizontal direction, so that the spot arrangement shown in FIG. Light pattern P _{Hi_SPOT} is formed.

The spot light distribution pattern P _{Hi_SPOT} has a higher light intensity than the wide light distribution pattern P _{Hi_WIDE} . As a result, the high beam light distribution pattern P _Hi () formed by superimposing the spot light distribution pattern P _{Hi_SPOT} and the wide light distribution pattern P _{Hi_WIDE.}
The composite light distribution pattern) has a high central luminous intensity and excellent distant visibility.

The becomes light distribution pattern P _{Hi_SPOT} spot is focused from the light distribution pattern P _{Hi_WIDE} for wide is parallel to the reference axis AX _62Hi wide light distribution pattern P _{Hi_WIDE} is relates vertical direction, the horizontal direction whereas formed by diffused light Ray _{Hi_WIDE} relates relates vertical and horizontal light distribution pattern P _{Hi_SPOT} spot, due to the fact that is formed by parallel light Ray _{Hi_SPOT} respect to the reference axis AX _62Hi Is.

The intensity of the light distribution pattern P _{Hi_SPOT} spot is higher than the light distribution pattern P _{Hi_WIDE} for wide is the third light source 14 _Hi and reflective surface 62a6 of the light distribution pattern for spots (and / or the light distribution pattern for spot The distance between the incident surface 62a5) is the third light source 14 _Hi and the reflecting surface 62a3 for the wide light distribution pattern (and / or the incident surface 62a1 for the wide light distribution pattern,
Since the distance is set longer than the distance between 62a2), the spot light distribution pattern P _Hi
In the second optical system that forms _{_SPOT} , the first optical system that forms the wide light distribution pattern P _{Hi_WIDE} .
This is because the light source image of the third light source 14 _Hi is relatively small as compared with the optical system, and the spot light distribution pattern P _{Hi_SPOT} is formed by this relatively small light source image.

That is, as shown in FIG. 93, the third light source 14 _Hi and the reflecting surface 6 for the wide light distribution pattern 6
In the first optical system in which the distance W between 2a3 and 2a3 is relatively short, the light source image of the third light source 14 _Hi becomes large, so that it is suitable for the wide light distribution pattern P _{Hi_WIDE} . On the other hand, the third light source 14 _Hi
In the second optical system in which the distance S between the light distribution pattern for the spot and the reflection surface 62a6 for the spot light distribution pattern is relatively long, the light source image of the third light source 14 _Hi becomes small, so that the light distribution pattern P _{Hi_S} for the spot
Suitable for _POT .

By adjusting the angles θ1 and θ2 shown in FIG. _81A , the balance between the luminous intensity of the spot light distribution pattern P _{Hi_SPOT and} the luminous intensity of the wide light distribution pattern P _{Hi_WIDE} can be adjusted.

The high beam light distribution pattern P _Hi is a spot light distribution pattern for high beams by lighting the first light source 14 _Lo1 for low _beams , the second light source 14 _Lo2 for low beams, and the third light source 14 _Hi for high beams. P _{Hi_SPOT} (see FIG. 91 (b)), wide light distribution pattern P _{Hi_WIDE} for high beam (see FIG. 91 (a)) and low beam light distribution pattern P _Lo (see FIG. 71).
(See)) is formed as a superposed synthetic light distribution pattern. Of course, not limited to this, the high beam light distribution pattern P _Hi includes the high beam spot light distribution pattern P _{Hi_SPOT} (see FIG. 91 (b)) when the third light source 14 _Hi for the high beam is turned on. The wide light distribution pattern P _{Hi_WIDE} for high beams (see FIG. 91 (a)) may be formed as a superposed composite light distribution pattern.

According to this embodiment, the following effects can be achieved.

That is, it is possible to reduce the size of the lens body 72 in which the first and second lens portions 12N _Lo1 and 12N _Lo2 for the low beam and the third lens portion 62 _Hi for the high beam are integrally molded. This is because, firstly, the third lens portion 62 _Hi has at least a part of the first lens portion 12N.
In a first cone portion _Lo1 state of being positioned in the space between the second cone portion of the second lens unit 12N _Lo2, the rear end portion of the first lens unit 12N _Lo1 and the second lens unit 12N _Lo2 It is connected to the rear end (not in parallel, but in series), and _secondly , the front _ends of the first and second lens units 12N _Lo1 and 12N _Lo2 for low beam (emission). The surface 12A2b) and the front end (exit surface) of the third lens portion 62 _Hi for the high beam are not configured as physically separated front ends (exit surface), but the first for the low beam. And the second lens unit 1
A part of the front end (exit surface 12A2b) of 2N _Lo1 and 12N _Lo2 (see the area AA2 surrounded by the alternate long and short dash line in FIG. 89 (b)) is the front end (exit surface) of the third lens portion 62 _Hi for high beam. ) (That is, a part of the emission surface 12A2b for the low beam also serves as the emission surface for the high beam).

Further, to provide a lens body 72 capable of forming a high beam light distribution pattern P _Hi (composite light distribution pattern) on which a spot light distribution pattern P _{Hi_SPOT} and a wide light distribution pattern P _{Hi_WIDE} are superimposed. Can be done.

This is because one lens body 72 _includes a first optical system that forms the wide light distribution pattern P _{Hi_WIDE} and a second optical system that forms the spot light distribution pattern P _{Hi_SPOT} .

Further, as a _{result that} the luminous intensity of the spot light distribution pattern P _{Hi_SPOT} is higher than that of the wide light distribution pattern P _{Hi_WIDE} , the spot light distribution pattern P _{Hi_SPOT} and the wide light distribution pattern P _{Hi_WIDE} are superimposed to form a high beam. The light distribution pattern P _Hi (composite light distribution pattern) can have a high central luminous intensity and excellent distant visibility.

The intensity of the light distribution pattern P _{Hi_SPOT} spot is higher than the light distribution pattern P _{Hi_WIDE} for wide is the third light source 14 _Hi and reflective surface 62a6 of the light distribution pattern for spots (and / or the light distribution pattern for spot The distance between the incident surface 62a5) is the third light source 14 _Hi and the reflecting surface 62a3 for the wide light distribution pattern (and / or the incident surface 62a1 for the wide light distribution pattern,
Since the distance is set longer than the distance between 62a2), the spot light distribution pattern P _Hi
In the second optical system that forms _{_SPOT} , the first optical system that forms the wide light distribution pattern P _{Hi_WIDE} .
This is because the light source image of the third light source 14 _Hi is relatively small as compared with the optical system, and the spot light distribution pattern P _{Hi_SPOT} is formed by this relatively small light source image.

As described above, "the first lens part for the low beam, the second lens part for the low beam, and
The idea of "integrally molding the third lens portion for the high beam" is that the vehicle lighting fixture 10N (lens body 12N) of the twelfth embodiment shown in FIG. 69 and the vehicle lighting fixture 64 (lens) of the thirteenth embodiment shown in FIG. 79. Not limited to the body 66), it can be applied to the vehicle lighting equipment (lens body) described in each of the above embodiments and various other vehicle lighting equipment (lens body).

For example, as the first and second lens portions, the lens body 12N of the twelfth embodiment shown in FIG. 69
Instead, the lens body 12 of the first embodiment shown in FIG. 1, the lens body 12A of the second embodiment shown in FIG. 16, the lens body 12J of the tenth embodiment shown in FIG. 46, or the lens body 12J shown in FIG. 56. The lens body 12K of the 11th embodiment can be used. This is because all of these lens bodies are lens portions for low beams.

Here, as the first and second lens portions, the lens body 12N of the twelfth embodiment shown in FIG. 69
Instead, the lens body 72A using the lens body 12K of the eleventh embodiment shown in FIG. 56 will be described.

FIG. 96A is a top view of the lens body 72A, and FIG. 96B is a front view.

The lens body 72A of this modification is the two twelfth lenses constituting the lens body 72 of the 14th embodiment.
This corresponds to replacing the vehicle lighting fixture 10N (lens body 12N) of the embodiment with the vehicle lighting fixture 10K (lens body 12K) of the eleventh embodiment. Other than that, the lens body 72A of the present modification has the same configuration as the lens body 72 of the 14th embodiment.

As shown in FIG. 96 (a), the rear end portions 12 of the first and second lens portions 12K _Lo1 and 12K _Lo2.
A1aa is a cone portion (or a bell shape) that narrows in a cone shape (or bell shape) from the front end portion 12A2bb side of each lens portion 12K _Lo1 and 12K _Lo2 toward the tip end side of the rear end portion 12A1aa, respectively.
In FIG. 96A, the portion including the pair of left and right side surfaces 44a and 44b) is included.

The first and second lens portions 12K _Lo1 and 12K _Lo2 are arranged in parallel in the horizontal direction as shown in FIG. 96 (b), and as shown in FIG. 96 (a), the cones of the first lens portion 12K _Lo1 . Part (corresponding to the first cone part of the present invention) and the cone part of the second lens body 12K _Lo2 (corresponding to the second cone part of the present invention)
They are connected to each other with a space formed between them. Of course, not limited to this
The first lens unit 12K _Lo1 and the second lens unit 12K _Lo2 may be arranged in parallel in a direction inclined with respect to the horizontal and connected to each other.

The front end portions 12A2bb of the first and second lens portions 12K _Lo1 and 12K _Lo2 include a horizontally extending flat exit surface 12Kb (see 46a, 46b, 46c in FIG. 56).
Of course, not limited to this, the front end portion of the first and second lens portions 12N _Lo1, 12N _Lo2 12A2
The bb may include a planar exit surface 12 Kb provided with a slant angle and / or a camber angle.

The first incident surface 62a1 is the exit surface of the front end 12A2bb (planar shape from the first incident surface 62a1 third lens unit 62 first and second lens portions 12K are incident on the internal _{Hi Lo1,} 12K _Lo2 12Kb The surface shape of the light from the third light source 14 _Hi emitted from) is configured so as to be collimated in the vertical direction and diffused in the horizontal direction. Further, the reflecting surface 62a3 for the wide light distribution pattern is incident on the inside of the third lens portion 62 _Hi from the second incident surface 62a and internally reflected (totally reflected) by the reflecting surface 62a3 for the wide light distribution pattern. ,
_Front end portion 12A2bb of the first and second lens portions 12K _Lo1 and 12K Lo2 (planar exit surface 1)
The surface shape is configured so that the light from the third light source 14 _Hi emitted from 2Kb) is collimated in the vertical direction and diffused in the horizontal direction. Other than that, the 14th
It has the same configuration as the lens body 72 of the embodiment.

The lens body 72A of the present modification can also achieve the same effect as that of the 14th embodiment.

Next, the lens body 72B, which is a modification of the lens body 72, will be described.

In the lens body 72B of this modification, the first incident surface 62a1 is omitted as in the rear end portion 62a of the lens body 62B shown in FIG. 87. That is, the incident surface A for the wide light distribution pattern is composed of only the second incident surface 62a2. Other than that, it has the same configuration as the lens body 72 of the 14th embodiment.

The lens body 72B of the present modification can also achieve the same effect as that of the 14th embodiment.

Next, the lens body 72C (third lens unit 62C _Hi ), which is a modification of the lens body 72 (third lens unit 62 _Hi ), will be described.

The lens body 72C (third lens unit 62C _Hi ) of this modified example has an incident surface 62a5 for a spot light distribution pattern and a reflecting surface 62a6 for a spot light distribution pattern from the third lens unit 62 _Hi shown in FIG. 92 and the like. , And the exit surface 62b2 for the spot light distribution pattern, that is, the one in which the second optical system forming the spot light distribution pattern P _{Hi_SPOT} for the high beam (see FIG. 91 (b)) is omitted.

FIG. 81 (b) shows the front surface of the rear end portion 62a (near the first incident surface 62a1, the second incident surface 62a2, and the reflecting surface 62a3 for the wide light distribution pattern) of the lens body 72C (third lens portion 62C _Hi ). It is a figure.

In the lens body 72C (third lens portion 62C _Hi ) of this modified example, as shown in FIG. 81 (b), the space between the third light source 14 _Hi and the first incident surface 62a1 is the second incident surface 62a2. (And the reflective surface 62a3 for the wide light distribution pattern). That is, in the lens body 72C (third lens portion 62C _Hi ) of this modified example, the fan-shaped notch portion 62a4 through which the light from the third light source 14 _Hi passes is omitted.

According to this modification, only the diffusion pattern P _{Hi_WIDE} for the high beam can be formed. Further, by adjusting the surface shapes of the first incident surface 62a1 and / or the second incident surface 62a2, it is possible to form only the spot light distribution pattern for the high beam.

Next, the vehicle lamp 10P of the fifteenth embodiment will be described with reference to the drawings.

The vehicle lamp 10P of the present embodiment is configured as follows.

FIG. 97A shows the rear end portion 12 of the lens body 12N constituting the vehicle lamp 10P of the present embodiment.
A front view of A1aa, FIG. 97 (b) is a sectional view (schematic view) of AA of FIG. 97 (a), FIG. 97 (c).
) Is a sectional view (schematic view) of BB in FIG. 97 (a).

As shown in FIGS. 97 (a) to 97 (c), the vehicle lamp 10P of the present embodiment is shown in FIG. 69.
It corresponds to the one in which the reflection surface Ref is added to the vehicle lamp 10N of the twelfth embodiment shown in the above.

In the vehicle lighting fixture 10N of the twelfth embodiment, the left and right sides of the space between the light source 14 and the first incident surface 12a are surrounded by a pair of left and right incident surfaces 42a and 42b (see FIG. 50B). Therefore, the light Ray _MID from the light source 14 that spreads in the left-right direction directly enters the inside of the lens body 12N from the pair of right and left incident surfaces 42a and 42b, and the low beam light distribution pattern _PLO (
It is used to form the mid light distribution pattern P _{MID_L} , P _{MID_R} ). Further, the upper side of the space between the light source 14 and the first incident surface 12a is surrounded by the upper incident surface 42c (see FIG. 72 (b)).
Therefore, the light Ray _WIDE from the light source 14 that spreads upward directly enters the inside of the lens body 12N from the upper incident surface 42c, and forms a low beam light distribution pattern P _LO (wide light distribution pattern P _WIDE ). Used for.

However, in the vehicle lamp 10N of the twelfth embodiment, as shown in FIG. 98, as shown in FIG.
The light Ray _OUT from the light source 14 spreading downward does not enter the inside of the lens body 12N and is not used for forming the low beam light distribution pattern P _LO .

In the vehicle lamp 10N of the present embodiment, the light Ray _OUT from the light source 14 that does not enter the inside of the lens body 12N and spreads downward is lensed from the rear end portion 12A1aa (that is, the incident surfaces 12a, 42a, 42b) of the lens body 12N. It is made incident inside the body 12N, for use in forming the light distribution pattern P _LO for low beam, and a reflecting surface Ref.

The reflecting surface Ref reflects light Ray _OUT other than the light directly incident on the inside of the lens body 12N from the rear end portion 12A1aa of the lens body 12N among the light from the light source 14, and the rear end portion 12A1aa (
That is, it is a reflecting surface that is incident on the inside of the lens body 12N from the incident surfaces 12a, 42a, 42b).

As shown in FIGS. 97 (a) to 97 (c), the reflecting surface Ref is the light source 14 and the first incident surface 1.
It is arranged below the space between 2a so as to surround the space from below. The reflection surface Ref is fixed to the substrate K on which the light source 14 is mounted. Of course, the present invention is not limited to this, and the reflective surface Ref may be fixed to a housing (not shown) or the like constituting a lighting chamber in which the vehicle lighting equipment 10P is housed.

The reflective surface Ref may be a reflector subjected to metal vapor deposition such as aluminum vapor deposition, a metal plate subjected to mirror surface treatment, a mirror member, or any other. It may be a reflective member.

The reflecting surface Ref may be a plane-shaped reflecting surface or a curved surface-shaped reflecting surface.

In the vehicle lamp 10P having the above configuration, as shown in FIG. 97 (c), the light from the light source 14 spreading downward is arranged below the space between the light source 14 and the first incident surface 12a. Reflected by the reflecting surface Ref, the rear end portion 12A1aa of the lens body 12N (that is, the incident surface 12a,
It is incident on the inside of the lens body 12N from 42a and 42b) and is used to form a low beam light distribution pattern P _LO (spot light distribution pattern P _SPOT , mid light distribution pattern P _{MID_L} , P _{MID_R} ).

At that time, the reflected light from the reflecting surface Ref incident on the inside of the lens body 12N from the first incident surface 12a forms the spot light distribution pattern P _SPOT (see FIG. 71 (b)) of the first optical system (FIG. 4).
It is controlled below the cut-off line by the first lower reflecting surface 12b (and shade 12c) constituting (see 9 (a)). Therefore, glare occurs in the spot light distribution pattern P _SPOT for the low beam (see FIG. 71B) due to the reflected light from the reflecting surface Ref incident on the inside of the lens body 12N from the first incident surface 12a. Can be suppressed.

Further, the reflective surfaces Re incident on the inside of the lens body 12N from the pair of left and right incident surfaces 42a and 42b.
The reflected light from f is the mid light distribution pattern P _{MID_L} , P _{MID_R} (FIG. 71 (c), FIG. 71 (d).
) Is formed by a pair of left and right second lower reflecting surfaces 48a and 48b (and shades 48c and 48d) constituting the second optical system (see FIGS. 73 and 74), which are controlled below the cut-off line. Therefore, due to the reflected light from the reflecting surface Ref incident on the inside of the lens body 12N from the pair of left and right incident surfaces 42a and 42b, the mid light distribution pattern P _{MID_} for the low beam
It is possible to suppress the occurrence of glare in _L and P _{MID_R} .

According to the present embodiment, in addition to the effects of the twelfth embodiment, the following effects can be further achieved.

That is, a light source 14 and a lens body 12N arranged in front of the light source 14 are provided, and a light distribution pattern including a cut-off line at the upper end edge (spot light distribution pattern P _SPOT , mid light distribution pattern P _{MID_L} , P _{MID_R} ). In the vehicle lighting equipment 10P configured to form the above, it is possible to suppress a decrease in light utilization efficiency. This reflects light other than the light directly incident on the inside of the lens body 12N (light Ray _OUT from the light source 14 spreading downward, see FIG. 98) among the light from the light source 14, and the rear end portion of the lens body 12N. 12A1aa (ie, incident surface 12a, 4
This is due to the provision of a reflecting surface Ref that is incident on the inside of the lens body 12N from 2a and 42b).

Next, the reflective surface RefA, which is a modification of the reflective surface Ref, will be described.

FIG. 99 is an example (top view) of the reflection surface RefA of this modified example.

The reflection surface RefA of this modification is a reflection surface including a first reflection region Ref _SPOT , a second reflection region Ref _{MID_L} , and a third reflection region Ref _{MID_R,} which are divided into three parts corresponding to the incident surfaces 12a, 42a, and 42b. It is configured as. Specifically, the reflection surface RefA of this modification is from the first reflection region Ref _SPOT , the light source 14, which reflects a part of the light from the light source 14 and causes the light from the first incident surface 12a to enter the inside of the lens body 12N. The second reflection region Ref _{MID_L} that reflects the other part of the light and causes it to _enter the inside of the lens body 12N from one of the two incident surfaces on the left and right, and the other part of the light from the light source 14. It is configured as a reflecting surface including a third reflecting region Ref _{MID_R} that reflects and is incident on the inside of the lens body 12N from the other incident surface 42b of the pair of left and right incident surfaces. The tip edges of the respective reflection regions Ref _SPOT , Ref _{MID_L} , and Ref _{MID_R} are shaped along the incident surfaces 12a, 42a, and 42b in a top view.

In the first reflection region Ref _SPOT , the reflected light from the first reflection region Ref _SPOT incident on the inside of the lens body 12N from the first incident surface 12a is, for example, in the region indicated by the reference numeral P _{SPOT (Ref)} in FIG. Its surface shape is configured so that light is distributed. The second reflection region Ref _{MID_L} is
The surface of the second reflection region Ref _{MID_L} incident on the lens body 12N from the left incident surface 42a so that the reflected light is distributed to, for example, the region indicated by the reference numeral P _{MID_L (Ref)} in FIG. The shape is configured. The third reflection region Ref _{MID_R} is the lens body 1 from the right incident surface 42b.
The surface shape is configured so that the reflected light from the third reflection region Ref _{MID_R} incident on the inside of 2N is distributed to, for example, the region indicated by the reference numeral P _{MID_R (Ref)} in FIG. Of course, the present invention is not limited to this, and the surface shapes of the respective reflection regions Ref _SPOT , Ref _{MID_L} , and Ref _{MID_R} may be configured so that the reflected light is distributed to other regions.

According to the reflection surface RefA of this modification, the respective reflection regions Ref _SPOT , Ref _{MID_L} , and Re.
f _By adjusting _{MID_R} individually, the lens body 1 can be seen from the incident surfaces 12a, 42a, and 42b, respectively.
The reflected light from each reflected region Ref _SPOT , Ref _{MID_L} , and Ref _{MID_R} incident on the inside of 2N can be individually controlled.

As described above, the idea of "improving the utilization efficiency of light from the light source 14 by adding a reflective surface" is not limited to the vehicle lamp 10N of the twelfth embodiment, and is described in each of the above embodiments. It can be applied to vehicle lamps and various other vehicle lamps.

This point will be described below.

For example, as shown in FIG. 101 (a), the upper incident surface 42c, that is, the wide light distribution pattern P _WIDE (see FIG. 71 (e)) is seen from the vehicle lamp 10N (lens body 12N) of the twelfth embodiment. Vehicle lighting fixture 10N1 (lens body 12) omitting the formed third optical system (see FIG. 76)
N1) is assumed.

In the vehicle lamp 10N1, as shown in FIG. 101A, the light Ray _OUT from the light source 14 spreading upward and downward does not enter the inside of the lens body 12N1 and the low beam light distribution pattern P _LO. Not used to form.

Therefore, based on the idea of "improving the utilization efficiency of the light from the light source 14 by adding the reflecting surface", the reflecting surface Ref (or RefA) is arranged as shown in FIG. 101 (b).

The reflecting surface Ref (or RefA) is arranged on the upper side and the lower side of the space between the light source 14 and the first incident surface 12a so as to surround the space from the upper side and the lower side, respectively.

In the vehicle lamp 10N1 to which the reflecting surface Ref (or RefA) is added as described above, as shown in FIG. 101 (b), the rear end portion of the lens body 12N1 (that is, the incident surfaces 12a and 4)
Light other than the light directly incident on the inside of the lens body 12N1 from 2a, 42b), that is, the light from the light source 14 spreading in the vertical direction is the upper side and the lower side of the space between the light source 14 and the first incident surface 12a. is reflected by the arranged reflecting surface Ref (or RefA), the rear end portion of the lens body 12N1 (i.e. the incident surface 12a, 42a, 42b) incident from inside the lens body 12N1, low-beam distribution pattern P _LO ( Light distribution pattern for spots P _SPOT , light distribution pattern for mids P
_It is used to form _{MID_L} , P _{MID_R} ).

At that time, the reflecting surface Ref (or R) incident on the inside of the lens body 12N1 from the first incident surface 12a
The first lower reflecting surface 12b (and shade) in which the reflected light from the efA) constitutes the first optical system (see FIG. 49 (a)) forming the spot light distribution pattern P _SPOT (see FIG. 71 (b)). 12c
) Controls below the cut-off line. Therefore, due to the reflected light from the reflecting surface Ref (or RefA) incident on the inside of the lens body 12N1 from the first incident surface 12a,
It is possible to suppress the occurrence of glare in the spot light distribution pattern P _SPOT for the low beam (see FIG. 71 (b)).

Further, the reflective surfaces R incident on the inside of the lens body 12N1 from the pair of left and right incident surfaces 42a and 42b.
The reflected light from ef (or RefA) is the mid light distribution pattern P _{MID_L} , P _{MID_R} (Fig. 71).
(C), cut by a pair of left and right second lower reflecting surfaces 48a, 48b (and shades 48c, 48d) constituting the second optical system (see FIGS. 73, 74) forming (see FIGS. 71 (d)). Controlled below offline. Therefore, glare _occurs in the mid light distribution patterns P _{MID_L} and P _{MID_R} for the low beam due to the reflected light from the reflecting surface Ref (or RefA) incident on the inside of the lens body 12N1 from the pair of left and right incident surfaces 42a and 42b. It can be suppressed from occurring.

According to this modification, the following effects can be obtained as in the fifteenth embodiment.

That is, a light source 14 and a lens body 12N1 arranged in front of the light source 14 are provided, and a light distribution pattern including a cut-off line at the upper end edge (spot light distribution pattern P _SPOT , mid light distribution pattern P _{MID_L} , P _{MID_R} ). In the vehicle lighting fixture 10N1 configured to form
It is possible to suppress a decrease in light utilization efficiency. This is the light from the light source 14 other than the light directly incident on the inside of the lens body 12N1 (the light Ray from the light source 14 spreading in the vertical direction).
_OUT . Reflection surface Ref that reflects (see FIG. 101A) and is incident on the inside of the lens body 12N1 from the rear end portion 12A1aa (that is, the incident surfaces 12a, 42a, 42b) of the lens body 12N1.
(Or RefA) is provided.

Further, for example, in the vehicle lamp 10 of the first embodiment shown in FIG. 1 (the same applies to the vehicle lamp 10A of the second embodiment shown in FIG. 16), as shown in FIG. 102 (a), in the vertical and horizontal directions. light Ray from spreading light source 14 _OUT is not incident on the inner lens body 12, 12A, is not used in formation of the light distribution pattern P _LO for low beam.

Therefore, based on the idea of "improving the utilization efficiency of the light from the light source 14 by adding the reflecting surface", the reflecting surface RefB is arranged as shown in FIG. 102 (b).

The reflecting surface RefB is configured as a tubular reflecting surface extending from the incident surface 12a side toward the rear (light source 14 side), and is arranged so as to surround the space between the light source 14 and the incident surface 12a. ..

In the vehicle lamp 10N of the first embodiment to which the reflecting surface RefB is added as described above (the same applies to the vehicle lamp 10A of the second embodiment), as shown in FIG. 102 (b), the lens body 12
, Light other than the light directly incident on the inside of the lens body 12 and 12A from the rear end portion (that is, the incident surface 12a) of 12A, that is, the light from the light source 14 spreading in the vertical and horizontal directions is the light source 14 and the incident surface 12a. It is reflected by the tubular reflecting surface RefB arranged so as to surround the space between the two, and is incident on the inside of the lens bodies 12 and 12A from the rear end portion (that is, the incident surface 12a) of the lens bodies 12 and 12A for low beam. It is used to form a light distribution pattern.

At that time, the reflected light from the reflecting surface RefB incident on the inside of the lens bodies 12 and 12A from the first incident surface 12a forms an optical system for a low beam light distribution pattern (FIGS. 2A and 17A).
It is controlled below the cut-off line by the lower reflective surface 12b (and shade 12c) that constitutes (see). Therefore, it is possible to suppress the occurrence of glare in the low beam light distribution pattern due to the reflected light from the reflecting surface RefB incident on the inside of the lens bodies 12 and 12A from the incident surface 12a.

According to this modification, the following effects can be obtained as in the fifteenth embodiment.

That is, a vehicle lamp having a light source 14 and lens bodies 12 and 12A arranged in front of the light source 14 and configured to form a light distribution pattern (low beam light distribution pattern) including a cut-off line at the upper end edge. At 10 and 10A, it is possible to suppress a decrease in light utilization efficiency. This is light other than the light directly incident on the inside of the lens bodies 12 and 12A among the light from the light source 14 (light Ray _OUT from the light source 14 spreading in the vertical and horizontal directions. See FIG. 102 (a)).
This is due to the fact that the reflecting surface RefB is provided so that the lens body 12, 12A is incident on the inside of the lens body 12, 12A from the rear end portion 12A1aa (that is, the incident surface 12a).

Each numerical value shown in the above-described embodiment and each modification is an example, and an appropriate numerical value different from this can be used.

The above embodiments are merely exemplary in all respects. These descriptions do not limit the present invention. The present invention can be practiced in various other forms without departing from its spirit or key features.

10, 10A-10N ... Vehicle lighting fixtures, 12, 12A, 12J, 12N ... Lens body, 12
A1 ... 1st lens portion, 12A1a ... 1st exit surface, 12A1aa ... 1st rear end portion, 12A1b
b ... 1st front end, 12A2 ... 2nd lens, 12A2a ... 2nd incident surface, 12A2aa ... 2nd rear end, 12A2b ... 2nd exit surface, 12A3 ... connecting, 12a ... 1st incident surface, 12b ...
Reflective surface (lower reflective surface), 12c ... shade, 12d ... exit surface, 14 ... light source, 16, 16C ...
Lens coupling, 18 ... holding member, 42a, 42b ... pair of left and right incident surfaces, 42c ... upper incident surface, 44a, 44b ... pair of left and right side surfaces, 44c ... upper surface, 44c1 ... overhead sign reflective surface, 44c2 ... upper left surface , 44c3 ... upper right surface, 46a, 46b ... pair of left and right exit surfaces

Claims (6)

At least in vehicle headlights with low beam optics
The low-beam optical module includes a light source and a lens body configured to control light from the light source to form a low-beam light distribution pattern including a cut-off line at the upper end edge.
The lens body includes an incident surface, an exit surface, a shade arranged between the incident surface and the exit surface, and a lower reflection surface arranged between the shade and the incident surface. ,
The incident surface, the shade, the lower reflecting surface, and the emitting surface are the light from the light source incident on the inside of the lens body from the incident surface, which is partially shielded by the shade and the lower reflecting surface. The light reflected from the inner surface is emitted from the exit surface and is irradiated forward to form an optical system for forming the low beam light distribution pattern including a cut-off line defined by the shade on the upper end edge. Ori,
The low beam optical module further includes a reflecting surface that reflects light from the light source toward the outside of the incident surface and causes the incident surface to enter the inside of the lens body.
The reflecting surface is a vehicle headlight arranged between the light source and the incident surface. The lens body further includes an intermediate emitting surface and an intermediate incident surface on which the intermediate emitting surface faces each other with a space in between.
The incident surface, the shade, the lower reflecting surface, the intermediate emitting surface, the intermediate incident surface, and the emitting surface are partially formed by the shade among the light from the light source incident on the inside of the lens body from the incident surface. The shielded light and the light internally reflected by the lower reflecting surface are emitted from the intermediate emitting surface, pass through the space, are incident on the lens body from the intermediate incident surface, and further from the emitting surface. The vehicle headlight according to claim 1, wherein an optical system is formed which forms the low beam light distribution pattern including a cut-off line defined by the shade on the upper end edge by emitting light and irradiating the light forward. light. The lens body includes a first lens portion, a second lens portion, and a connecting portion connecting the first lens portion and the second lens portion.
The first lens unit includes the incident surface, the shade, the lower reflecting surface, and the intermediate emitting surface.
The vehicle headlight according to claim 2 , wherein the second lens unit includes the intermediate entrance surface and the emission surface. The lens body includes a first lens portion and a second lens portion.
Further, a connecting member for connecting the first lens portion and the second lens portion is provided.
The first lens unit includes the incident surface, the shade, the lower reflecting surface, and the intermediate emitting surface.
The vehicle headlight according to claim 2 , wherein the second lens unit includes the intermediate entrance surface and the emission surface. The vehicle headlight according to any one of claims 1 to 4, wherein the reflecting surface is a tubular reflecting surface extending from the incident surface side toward the light source side. The vehicle headlight according to any one of claims 1 to 5, wherein the light from the light source incident on the inside of the lens body is focused toward the shade.