JP2018060809A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens body (lens combination) having an integrated appearance extending linearly in a predetermined direction, and to provide a vehicular lighting fixture including the same.SOLUTION: A lens body includes a first lens part 12A1 and a second lens part 12A2, and light from a light source 14 enters from a first incident surface 12a, one part of the light is shielded by a shade of the first lens part 12A1, and then it emits from a first emission surface 12A1a, and then, the light enters from a second incident surface 12A2a of the second lens part 12A2, emits from a second emission surface 12A2b and is radiated frontward. Thus, the lens body forms a predetermined light distribution pattern including a cutoff line defined by the shade at an upper end edge. The second emission surface 12A2b is constituted as a semi-cylindrical surface.SELECTED DRAWING: Figure 16

Description

The present invention relates to a lens body, a lens combination body, and a vehicle lamp, and more particularly, to a lens body, a lens combination body, and a vehicle lamp including the lens body used in combination with a light source.

Conventionally, a vehicular lamp having a structure in which a light source and a lens body are combined has been proposed (for example,
Patent Document 1).

56 is a longitudinal sectional view of the vehicular lamp 200 described in Patent Document 1, and FIG. 57 is a top view showing a state in which a plurality of vehicular lamps 200 (a plurality of lens bodies 220) are arranged in a line.

As shown in FIG. 56, a vehicular lamp 200 described in Patent Document 1 includes a light source 210 having a semiconductor light emitting element and a lens body 220, and the lens body 220 has a surface with a light emitting surface facing upward. A hemispherical incident surface 221 that covers the light source 210 from above, and a first reflecting surface 222 that is disposed in the traveling direction of light from the light source 210 that enters the lens body 220 from the incident surface 221.
(Reflection surface by metal vapor deposition), a second reflection surface 223 (reflection surface by metal vapor deposition) extending forward from the lower end edge of the first reflection surface 222, a convex lens surface 224, and the like are formed.

JP-A-2005-228502

However, in the vehicular lamp 200 configured as described above, the convex lens surface 224 that is the final exit surface of the lens body 220 is configured as a hemispherical lens surface. As a result, as shown in FIG. Even if the lamps 200 (the plurality of lens bodies 220) are arranged in a line, it is possible to form a vehicular lamp (lens combined body) that has an appearance that has a continuous appearance and has a sense of unity that extends in a line shape in a predetermined direction. There is a problem that it cannot be done (design flexibility is poor).

This invention is made | formed in view of such a situation, and provides the lamp | ramp for vehicles provided with the lens body (lens coupling | bonding body) of the unity appearance with a sense of unity extended in the shape of a line in a predetermined direction. Objective.

In order to achieve the above object, the invention according to claim 1 includes a first lens unit and a second lens unit, and light from a light source is transmitted from the first incident surface of the first lens unit to the first lens unit. After entering the inside and partially shielded by the shade of the first lens portion, the light is emitted from the first exit surface of the first lens portion, and further from the second entrance surface of the second lens portion. A predetermined light distribution pattern including a cut-off line defined by the shade is formed at the upper end edge by being incident on the inside of the lens unit and emitted from the second exit surface of the second lens unit and irradiated forward. In the lens body configured as described above, the first emission surface is a surface that condenses light from the light source emitted from the first emission surface in the first direction, and is configured as a semi-cylindrical surface.
The second emission surface is a surface that collects light from the light source emitted from the second emission surface in a second direction orthogonal to the first direction, and is configured as a semi-cylindrical surface. It is comprised as follows.

According to the first aspect of the present invention, firstly, it is possible to provide a lens body having a great sense of unity that extends in a line shape in a predetermined direction. Secondly, a predetermined light distribution pattern (in a horizontal direction and a vertical direction) is collected even though the second emission surface, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refractive surface). For example, it is possible to provide a lens body capable of forming a low beam light distribution pattern including a cut-off line defined by a shade at the upper edge.

The second output surface, which is the final output surface, is configured as a semi-cylindrical surface (a semi-cylindrical refractive surface) that can have a unity appearance extending in a line shape in a predetermined direction. It is because.

A predetermined light distribution pattern (for example, an upper end edge) condensed in the horizontal direction and the vertical direction even though the second emission surface as the final emission surface is a semi-cylindrical surface (a semi-cylindrical refractive surface) The low-beam light distribution pattern including the cut-off line defined by the shade in the first lens portion is mainly formed by focusing the light in the first direction (for example, the horizontal direction or the vertical direction) in the first lens portion. A light exit surface (a semi-cylindrical refracting surface) is in charge, and a second light output that is mainly the final light exit surface of the lens body mainly collects light in a second direction (eg, a vertical direction or a horizontal direction) orthogonal to the first direction. This is because the second emission surface (semi-columnar refractive surface) of the lens unit takes charge. That is, it is due to the decomposition of the light collecting function.

According to a second aspect of the present invention, in the first aspect of the present invention, the lens body is a lens body having a shape extending along a first reference axis extending in a horizontal direction, and the first lens portion is The first entrance surface, the reflection surface, the shade, and the first exit surface are included, and the second lens unit includes the second entrance surface and the second exit surface, and the first entrance surface and the reflection surface. The shade, the first exit surface, the second entrance surface, and the second exit surface are arranged in this order along the first reference axis, and the first entrance surface is the first entrance surface. The light from the light source disposed in the vicinity is refracted and incident on the inside of the first lens unit, and the light from the light source incident on the inside of the first lens unit is at least in the vertical direction. Passing through the center and a point in the vicinity of the shade, and the first reference The light is condensed toward the second reference axis that is inclined obliquely forward and downward, the reflective surface extends forward from the lower edge of the incident surface, and the shade is It is formed in the front-end | tip part of the said reflective surface, It is characterized by the above-mentioned.

According to the second aspect of the present invention, firstly, it is possible to provide a lens body in which a reflection surface by metal vapor deposition that causes a cost increase is omitted. Second, it is possible to provide a lens body capable of suppressing the melting of the lens body and the decrease in the light source output due to the heat generated by the light source.

The reason why the reflective surface by metal vapor deposition, which causes an increase in cost, can be omitted is that light from the light source is controlled not by the reflective surface by metal vapor deposition but by refraction at the incident surface and internal reflection at the reflective surface. It is because.

The lens body can be prevented from melting or the light source output from being reduced due to the heat generated by the light source. The incident surface is formed at the rear end of the lens body and the light source This is because it is arranged outside the lens body (that is, at a position away from the incident surface of the lens body).

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the lens body includes the first lens unit, the second lens unit, and the first lens unit and the second lens unit. The connecting portion forms a space surrounded by the first exit surface, the second entrance surface, and the connecting portion between the first lens portion and the second lens portion. It is characterized by being connected in a connected state.

According to invention of Claim 3, the lens body by which the 1st lens part and the 2nd lens part were connected can be comprised.

The invention according to claim 4 is the lens body according to any one of claims 1 to 3, wherein the lens body is a lens body integrally formed by injection molding using a mold. The space is formed by a mold having a pulling direction opposite to the connecting portion, and in order to smoothly pull out the mold, a pulling angle is set for each of the first emission surface and the second incident surface. The surface shape of the second emission surface is adjusted so that light from the light source emitted from the second emission surface becomes light parallel to the first reference axis. It is characterized by.

According to the fourth aspect of the present invention, the first light exit surface and the second light entrance surface are set with a draft angle, but the light emitted from the light source that is emitted from the second light exit surface that is the final light exit surface. A lens body suitable for a vehicular lamp can be provided in which light is parallel to the first reference axis.

The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the first direction is a horizontal direction, and the first emission surface is a semicircle extending in a vertical direction. It is configured as a columnar surface, the second direction is a vertical direction, and the second emission surface is configured as a semi-cylindrical surface extending in a horizontal direction.

According to the invention described in claim 5, as a result of the final emission surface being the second emission surface (a semi-cylindrical surface extending in the horizontal direction), the unity appearance that extends in a line shape in the horizontal direction is obtained. A lens body can be provided.

The invention according to claim 6 is the invention according to any one of claims 1 to 4, wherein the first direction is a vertical direction, and the first emission surface is a semicircle extending in a horizontal direction. It is configured as a columnar surface, the second direction is a horizontal direction, and the second emission surface is configured as a semi-cylindrical surface extending in a vertical direction.

According to the invention described in claim 6, as a result of the final emission surface becoming the second emission surface (a semi-cylindrical surface extending in the vertical direction), the unity appearance that extends in a line shape in the vertical direction is obtained. A lens body can be provided.

The invention described in claim 7 includes a plurality of lens bodies according to any one of claims 1 to 6, and an integrally molded lens assembly, wherein each of the plurality of lens bodies is the first one. The two exit surfaces are arranged in a row in a state of being adjacent to each other, and are configured as a lens combination constituting a semi-columnar exit surface group extending in a line shape in a predetermined direction.

According to the seventh aspect of the present invention, it is possible to provide a lens assembly that has a sense of unity and extends in a line shape in a predetermined direction (for example, a horizontal direction or a vertical direction).

The invention according to claim 8 includes a light source, a first lens portion, and a second lens portion, and light from the light source enters the first lens portion from a first incident surface of the first lens portion. Then, after being partially shielded by the shade of the first lens unit, the light exits from the first exit surface of the first lens unit, and further enters the second lens unit from the second entrance surface of the second lens unit. Incident and second
A vehicle including a lens body configured to form a predetermined light distribution pattern including a cut-off line defined by the shade at an upper end edge by being emitted from the second emission surface of the lens unit and irradiated forward. In the lamp, the first emission surface is a surface that collects light from the light source emitted from the first emission surface in the first direction, and is configured as a semi-cylindrical surface, and the second emission surface. The surface is a surface that condenses light from the light source emitted from the second emission surface in a second direction orthogonal to the first direction, and is configured as a semi-cylindrical surface.

According to the eighth aspect of the present invention, firstly, it is possible to provide a vehicular lamp that includes a lens body that looks great and has a sense of unity extending in a line in a predetermined direction. Secondly, a predetermined light distribution pattern (in a horizontal direction and a vertical direction) is collected even though the second emission surface, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refractive surface). For example, it is possible to provide a vehicular lamp including a lens body capable of forming a low beam light distribution pattern including a cut-off line defined by a shade at the upper edge.

The second output surface, which is the final output surface, is configured as a semi-cylindrical surface (a semi-cylindrical refractive surface) that can have a unity appearance extending in a line shape in a predetermined direction. It is because.

A predetermined light distribution pattern (for example, an upper end edge) condensed in the horizontal direction and the vertical direction even though the second emission surface as the final emission surface is a semi-cylindrical surface (a semi-cylindrical refractive surface) The low-beam light distribution pattern including the cut-off line defined by the shade in the first lens portion is mainly formed by focusing the light in the first direction (for example, the horizontal direction or the vertical direction) in the first lens portion. A light exit surface (a semi-cylindrical refracting surface) is in charge, and a second light output that is mainly the final light exit surface of the lens body mainly collects light in a second direction (eg, a vertical direction or a horizontal direction) orthogonal to the first direction. This is because the second emission surface (semi-columnar refractive surface) of the lens unit takes charge. That is, it is due to the decomposition of the light collecting function.

The invention according to claim 9 is the lens body according to claim 8, wherein the lens body is a lens body having a shape extending along a first reference axis extending in a horizontal direction, and the first lens portion is The first entrance surface, the reflection surface, the shade, and the first exit surface are included, and the second lens unit includes the second entrance surface and the second exit surface, and the first entrance surface and the reflection surface. The shade, the first exit surface, the second entrance surface, and the second exit surface are arranged in this order along the first reference axis, and the first entrance surface is the first entrance surface. The light from the light source disposed in the vicinity is refracted and incident on the inside of the first lens unit, and the light from the light source incident on the inside of the first lens unit is at least in the vertical direction. Passing through the center and a point in the vicinity of the shade, and the first reference The light is condensed toward the second reference axis that is inclined obliquely forward and downward, the reflective surface extends forward from the lower edge of the incident surface, and the shade is It is formed in the front-end | tip part of the said reflective surface, It is characterized by the above-mentioned.

According to the ninth aspect of the present invention, firstly, it is possible to provide a vehicular lamp including a lens body in which a reflective surface by metal vapor deposition that causes a cost increase is omitted. Secondly, it is possible to provide a vehicular lamp including a lens body that can prevent the lens body from being melted or the light source output from being lowered due to heat generated by the light source.

The reason why the reflective surface by metal vapor deposition, which causes an increase in cost, can be omitted is that light from the light source is controlled not by the reflective surface by metal vapor deposition but by refraction at the incident surface and internal reflection at the reflective surface. It is because.

The lens body can be prevented from melting or the light source output from being reduced due to the heat generated by the light source. The incident surface is formed at the rear end of the lens body and the light source This is because it is arranged outside the lens body (that is, at a position away from the incident surface of the lens body).

The invention according to claim 10 includes a light source, a shade, a first lens portion and a second lens portion,
After the light from the light source is partially blocked by the shade, the first lens unit first
Incident from the incident surface into the first lens unit and emitted from the first exit surface of the first lens unit;
Further, the shade enters the upper end edge by being incident on the inside of the second lens unit from the second incident surface of the second lens unit, emitted from the second exit surface of the second lens unit, and irradiated forward. In the vehicular lamp provided with a lens body configured to form a predetermined light distribution pattern including a cut-off line defined by the first emission surface, the first emission surface is light from the light source that is emitted from the first emission surface. Is a surface that collects light in the first direction, and is configured as a semi-cylindrical surface, and the second emission surface is orthogonal to the first direction from the light source emitted from the second emission surface. It is a surface that condenses light in the second direction and is configured as a semi-cylindrical surface.

According to the tenth aspect of the present invention, first, a vehicular lamp (for example, a so-called direct projection type (also referred to as a direct projection type) provided with a lens body having a sense of unity extending in a line shape in a predetermined direction. Or a projector-type vehicular lamp). Secondly, a predetermined light distribution pattern (in a horizontal direction and a vertical direction) is collected even though the second emission surface, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refractive surface). For example, a vehicular lamp (for example, a so-called direct projection type (also referred to as a direct-light type)) having a lens body capable of forming a low beam light distribution pattern including a cut-off line defined by a shade at the upper end edge, or A projector-type vehicular lamp) can be provided.

The second output surface, which is the final output surface, is configured as a semi-cylindrical surface (a semi-cylindrical refractive surface) that can have a unity appearance extending in a line shape in a predetermined direction. It is because.

A predetermined light distribution pattern (for example, an upper end edge) condensed in the horizontal direction and the vertical direction even though the second emission surface as the final emission surface is a semi-cylindrical surface (a semi-cylindrical refractive surface) The low-beam light distribution pattern including the cut-off line defined by the shade in the first lens portion is mainly formed by focusing the light in the first direction (for example, the horizontal direction or the vertical direction) in the first lens portion. A light exit surface (a semi-cylindrical refracting surface) is in charge, and a second light output that is mainly the final light exit surface of the lens body mainly collects light in a second direction (eg, a vertical direction or a horizontal direction) orthogonal to the first direction. This is because the second emission surface (semi-columnar refractive surface) of the lens unit takes charge. That is, it is due to the decomposition of the light collecting function.

The invention according to claim 11 includes a light source, a first lens unit, and a second lens unit, and light from the light source enters the first lens unit from a first incident surface of the first lens unit. The first
The light is emitted from the first exit surface of the lens unit, and further from the second entrance surface of the second lens unit.
In a vehicular lamp including a lens body configured to form a predetermined light distribution pattern by being incident on a lens portion, emitted from a second emission surface of the second lens portion, and irradiated forward. The first emission surface is a surface that condenses light from the light source emitted from the first emission surface with respect to the first direction, and is configured as a semi-cylindrical surface. Second
A surface for condensing light from the light source emitted from an emission surface in a second direction orthogonal to the first direction, and is configured as a semi-cylindrical surface.

According to the eleventh aspect of the present invention, firstly, a vehicular lamp (for example, a so-called direct projection type (also referred to as a direct projection type) provided with a lens body having a sense of unity extending in a line shape in a predetermined direction. Or a projector-type vehicular lamp). Secondly, a predetermined light distribution pattern (in a horizontal direction and a vertical direction) is collected even though the second emission surface, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refractive surface). For example, it is possible to provide a vehicular lamp (for example, a so-called direct projection type (also referred to as a direct-light type) or a projector type vehicular lamp) provided with a lens body capable of forming a high beam light distribution pattern. it can.

The second output surface, which is the final output surface, is configured as a semi-cylindrical surface (a semi-cylindrical refractive surface) that can have a unity appearance extending in a line shape in a predetermined direction. It is because.

A predetermined light distribution pattern (for example, for a high beam) condensed in the horizontal direction and the vertical direction even though the second emission surface as the final emission surface is a semi-cylindrical surface (a semi-cylindrical refractive surface). The light distribution pattern can be formed mainly by the first light exit surface (semi-columnar refractive surface) of the first lens unit for condensing light in the first direction (for example, horizontal direction or vertical direction). Then, the second exit surface (semi-cylindrical shape) of the second lens portion, which is the final exit surface of the lens body, mainly collects light in a second direction (for example, a vertical direction or a horizontal direction) orthogonal to the first direction. This is because the refractive surface is in charge.
That is, it is due to the decomposition of the light collecting function.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the lens body (lens coupling | bonding body) of the unity appearance with a sense of unity extended in a line shape in a predetermined direction, and a vehicle lamp provided with the same.

It is a longitudinal section of vehicular lamp 10 which is a 1st embodiment of the present invention. (A) The perspective view of the lens body 12 seen from the front, (b) The perspective view of the lens body 12 seen from the back. (A) Top view of lens body 12, (b) Bottom view, (c) Side view. (A) The figure showing a mode that the light from the light source 14 (precisely the reference point F) injects into the entrance plane 12a, (b) The light (direct light RayA) from the light source 14 which injected into the lens body 12 inside. It is a figure showing a mode that it condenses. It is an example (transverse sectional view) of the incident surface 12a. It is another example (transverse cross section) of the entrance plane 12a. (A) (b) It is a figure for demonstrating the distance between the entrance plane 12a and the light source 14. FIG. It is a figure for demonstrating the role of the shade 12c. (A) Schematic diagram of the shade 12c viewed from the position of the light source 14, (b) An enlarged perspective view enlarging the reflecting surface 12b (including the shade 12c) shown in FIG. 2 (a), (c) FIG. 2 (a). It is a top view of the reflective surface 12b (including shade 12c) shown in FIG. (A)-(c) It is the modification (side view) of the shade 12c. (A) An example of a low-beam light distribution pattern P1 formed on a virtual vertical screen (disposed approximately 25 m ahead from the front of the vehicle) by the vehicular lamp 10 according to the first embodiment, (B) An example of the light distribution pattern P2 for low beam, (c) An example of the light distribution pattern P3 for low beam. 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 reflecting surface 12b is arranged in the horizontal direction, a diagram depicting a situation in which reflected light RayB ′ internally reflected by reflecting surface 12b travels in a direction not incident on exit surface 12d, (b) reflecting surface 12b FIG. 6 is a diagram illustrating a state in which the reflected light RayB internally reflected by the reflecting surface 12b travels in a direction to enter the exit surface 12d when it is arranged to be inclined with respect to the first reference axis AX1. (A) When the reflective surface 12b is arranged in the horizontal direction, a diagram depicting a state in which the reflected light RayB ′ traveling in the direction not incident on the exit surface 12d can be captured by extending the reflective surface 12b upward; b) When the reflecting surface 12b is disposed so as to be inclined with respect to the first reference axis AX1, more light (reflected light RayB internally reflected by the reflecting surface 12b) is captured without extending the reflecting surface 12b upward. FIG. (A) The second reference axis AX2 is arranged in the horizontal direction, and the light from the light source 14 incident on the lens body 12 is condensed toward the second reference axis AX2 toward the shade 12c at least in the vertical direction. In this case, a diagram depicting a state in which most of the light from the light source 14 incident on the inside of the lens body 12 is shielded by the shade 12c. When the light from the light source 14 incident on the inside of the lens body 12 is condensed toward the second reference axis AX2 toward the shade 12c at least in the vertical direction, the light captured by the emission surface 12d (the inner surface of the reflection surface 12b) It is the figure which showed a mode that reflected reflected light RayB) increased. It is a perspective view of 10 A of vehicle lamps which are 2nd Embodiment of this invention. (A) The longitudinal cross-sectional view of 10 A of vehicle lamps, (b) It is a figure showing a mode that the light from the light source 14 advances the inside of the lens body 12A. It is a top view showing a mode that a plurality of vehicular lamps 10 (a plurality of lens bodies 12) of a 1st embodiment are arranged in a line. (A) Front view showing a state in which a plurality of vehicular lamps 10A (a plurality of lens bodies 12A) of the second embodiment are arranged in a line in the horizontal direction, (b) a top view. (A) An example of a low beam light distribution pattern P1a formed on a virtual vertical screen (disposed approximately 25 m ahead from the front of the vehicle) facing the front of the vehicle by the vehicle lamp 10A of the second embodiment, (B) An example of the low beam light distribution pattern P1b, (c) an example of the low beam light distribution pattern P1c. (A) Top view of lens body 12A of 2nd Embodiment, (b) Side view, (c) Bottom view. It is an example (cross-sectional view) of the 1st entrance plane 12a. It is a perspective view for demonstrating lens body 12A (1st output surface 12A1a, 2nd entrance surface 12A2a, and 2nd output surface 12A2b) of 2nd Embodiment. It is a figure for demonstrating each normal line of 1st output surface 12A1a, 2nd entrance surface 12A2a, and 2nd output surface 12A2b. It is a figure explaining lens body 12B which is the 1st modification of lens body 12A of a 2nd embodiment. It is a perspective view for demonstrating lens body 12C (1st output surface 12A1a, 2nd entrance surface 12A2a, and 2nd output surface 12A2b) which is the 2nd modification of lens body 12A of 2nd Embodiment. It is a front view showing a mode that a plurality of vehicular lamps 10C (a plurality of lens bodies 12C) are arranged in a line in the vertical direction. It is the schematic of the direct projection type vehicle lamp 20 to which the idea of "disassembling a condensing function" is applied. This is an example of a high beam light distribution pattern P _Hi formed on a virtual vertical screen (disposed approximately 25 m forward from the front of the vehicle) facing the front of the vehicle. It is the schematic of the projector type vehicle lamp 30 to which the idea of "disassembling a condensing function" is applied. (A) Side view (only main optical surface) of vehicular lamp 10D (fifth embodiment) provided with a camber angle, (b) Top view (only main optical surface), (c) Formed by vehicular lamp 10D (D) Side view (only main optical surface) of vehicular lamp 10A of the second embodiment in which no camber angle is given, (e) Top view (only main optical surface) (F) It is an example of the light distribution pattern for low beams formed by 10 A of vehicle lamps of 2nd Embodiment. It is a top view (only main optical surface) for demonstrating the problem at the time of providing the camber angle. It is a figure for demonstrating the problem which appears in the light distribution pattern for low beams when a camber angle is provided. (A) Cross-sectional view at position B shown in FIG. 32 (only main optical surface), (b) Cross-sectional view at position C shown in FIG. 32 (only main optical surface). (A) It is a perspective view (only main optical surface) of vehicular lamp 10D of this embodiment, (b) It is a perspective view (only main optical surface) of vehicular lamp 10A of 2nd Embodiment. It is a front view of vehicle lamp 10E (6th Embodiment) to which the slant angle | corner was provided. (A) The figure for demonstrating the problem which appears in the light distribution pattern for low beams when a slant angle | corner is provided, (b) It is the figure which represented typically Fig.37 (a). (A) The figure for demonstrating that the problem (rotation) which appears in the light distribution pattern for low beams was suppressed, (b) The figure which represented typically Fig.38 (a). (A) Side view (main optical surface only) of vehicular lamp 10F (seventh embodiment) provided with camber angle and slant angle, (b) Top view (only main optical surface), (c) Vehicular lamp It is an example of the light distribution pattern for low beams formed by 10F. (A) Side view (only main optical surface) of vehicular lamp 10G of the first comparative example, (b) Top view (only main optical surface), (c) Example of light distribution pattern formed by vehicular lamp 10G It is. (A) Side view of vehicle lamp 10H of second comparative example (only main optical surface), (b) Top view (only main optical surface), (c) Example of light distribution pattern formed by vehicle lamp 10H It is. (A) An example of a low beam light distribution pattern formed by the vehicular lamp 10D of the fifth embodiment (also the vehicular lamp 10F of the seventh embodiment) when the camber angle θ1 is 30 °, (b) It is an example of the low beam light distribution pattern formed by the vehicular lamp 10D of the fifth embodiment (the same applies to the vehicular lamp 10F of the seventh embodiment) when the camber angle θ1 is 45 °. It is sectional drawing (only main optical surfaces) of 10 A of vehicle lamps of 2nd Embodiment. (A) An example in which, in the second emission surface 12A2b, the lower partial region 12A2b2 from which light upward to the horizontal is emitted is physically cut to leave the upper region 12A2b1, (b) the second emission 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 12A2b becomes parallel or downward with respect to the first reference axis AX. In this example, the second emission surface 12A2b is adjusted and divided into an upper region 12A2b1 and a lower region 12A2b2. The second reference axis AX2 is a top view (only the main optical surface) of the vehicular lamp 10I that is inclined with respect to the first reference axis AX1 when viewed from above. It is a perspective view of vehicle lamp 10J (lens body 12J). (A) Top view of vehicle lamp 10J (lens body 12J), (b) Front view, (c) Side view. (A) Example of low beam light distribution pattern P _LO (synthetic light distribution pattern) formed by the vehicular lamp 10J (lens body 12J), (b) to (d) Each part of the distributed light constituting FIG. 48 (a) This is an example of patterns P _SPOT , P _MID , and P _WIDE . (A) Side view of first optical system (only main optical surface), (b) Top view of second optical system (only main optical surface), (c) Side view of third optical system (only main optical surface) It is. (A) Front view of first rear end portion 12A1aa of first lens portion 12A1, (b) AA sectional view (schematic diagram) in FIG. 50 (a), (c) BB in FIG. 50 (a). It is sectional drawing (schematic diagram). It is a front view (photograph) of the vehicular lamp 10J (lens body 12J) showing a state where multipoint light emission is performed. (A) Side view of the vehicular lamp 10E (lens body 12A) of the sixth embodiment (only main optical surface from which the first emission surface 12A1a is omitted), (b) Top view (main from which the first emission surface 12A1a is omitted) (D) optical surface only), (d) side view (only main optical surface with the first emission surface 12A1a omitted), and (e) top view (only main optical surface with the first emission surface 12A1a omitted). FIG. 52A is a top view in which the first emission surface 12A1a is added to FIG. 52B, and FIG. 52B is a top view in which the first emission surface 12A1a is added to FIG. (A) (b) It is an example of adjustment of the surface shape of a pair of left and right entrance surfaces 42a and 42b and / or a pair of left and right side surfaces 44a and 44b constituting the second optical system. (A) (b) It is an example of adjustment of the surface shape of the upper entrance surface 42c which comprises a 3rd optical system. It is a longitudinal cross-sectional view of the vehicular lamp 200 described in Patent Document 1. It is a top view showing a mode that a plurality of vehicular lamps 200 (a plurality of lens bodies 220) are arranged in a line.

Hereinafter, the vehicle lamp which is 1st Embodiment of this invention is demonstrated, referring drawings.

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

As shown in FIG. 1, the vehicular lamp 10 of the present embodiment includes a lens body 12, a light source 14 disposed in the vicinity of the incident surface 12 a of the lens body 12, and the like, and a virtual vertical screen (vehicle) It is configured as a vehicle headlamp that forms a low beam light distribution pattern P1 including cut-off lines CL1 to CL3 on the upper edge shown in FIG. ing.

2A is a perspective view of the lens body 12 viewed from the front, FIG. 2B is a perspective view of the lens body 12 viewed from the rear, FIG. 3A is a top view of the lens body 12, and FIG. FIG. 3B is a bottom view, and FIG. 3C is a side view.

As shown in FIG. 1, the lens body 12 is a lens body having a shape extending along a first reference axis AX1 extending in the horizontal direction, and includes an entrance surface 12a, a reflection surface 12b, a shade 12c, an exit surface 12d, and an entrance surface 12a. The reference point F in the optical design arranged in the vicinity is included. 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.

A dotted line with an arrow at the tip in FIG. 1 represents an optical path of light from the light source 14 (more precisely, the reference point F) that has entered the lens body 12.

The main functions of the lens body 12 are firstly to capture the light from the light source 14 into the lens body 12, and secondly to proceed toward the exit surface 12d of the light captured into the lens body 12. The outgoing surface 12 is generated by the direct light RayA and the reflected light RayB that is internally reflected by the reflective surface 12b.
The light intensity distribution (light source image) formed in the vicinity of the focal point F _12d of d (lens portion) is reversely projected to form a low beam light distribution pattern including a cutoff line at the upper edge.

4A shows a state in which light from the light source 14 (precisely, the reference point F) enters the incident surface 12a, and FIG. 4B shows light from the light source 14 that has entered the lens body 12. FIG. (Direct light RayA
FIG.

The incident surface 12a is formed at the rear end of the lens body 12, and is light from the light source 14 (precisely, the reference point F in optical design) disposed 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-form curved surface convex toward the light source 14), and light (direct light RayA) incident on the lens body 12 is at least in the vertical direction. , The surface shape is configured so as to converge 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 (precisely, the reference point F) and a point near the shade 12c, and is inclined obliquely forward and downward with respect to the first reference axis AX1 ( (See FIG. 1).

The light source 14 is, for example, a metal substrate (not shown), white L mounted on the surface of the substrate.
A semiconductor light emitting element (not shown) such as an ED light source (or white LD light source) is provided. The number of semiconductor light emitting elements may be one or more. The light source 14 is a white LED light source (or white L
A light source other than a semiconductor light emitting element such as a (D light source) may be used. The light source 14 is in the vicinity of the incident surface 12a of the lens body 12 in a posture in which the light emitting surface (not shown) is directed obliquely 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 AX2. (Near reference point F). The light source 14 is configured so that the optical axis AX ₁₄ of the light source 14 does not coincide with the second reference axis AX 2 (for example, the attitude in which the optical axis AX ₁₄ of the light source 14 is disposed in the horizontal direction). You may arrange | position in the entrance plane 12a vicinity (reference point F vicinity).

When the light source 14 is a semiconductor light emitting element (for example, a white LED light source), the directivity characteristic of light emitted from the light source 14 (light emitting surface) is Lambertian and can be expressed as I (θ) = I0 × cos θ. This represents the spread of 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 shows an example (transverse sectional view) of the incident surface 12a, and FIG. 6 shows another example (transverse sectional view) of the incident surface 12a.
It is.

As shown in FIG. 5, in the horizontal direction, the incident surface 12 a condenses light from the light source 14 that has entered the lens body 12 (direct light RayA) toward the first reference axis AX1 toward the shade 12 c. Thus, the surface shape is configured. In addition, as shown in FIG. 6, the incident surface 12a is light (direct light RayA) from the light source 14 that has entered 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 shape of the incident surface 12a (for example, the curvature of the incident surface 12a in the horizontal direction).

FIG. 7A and FIG. 7B are diagrams for explaining the distance between the incident surface 12 a 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
The light source image is smaller than when the distance between 2a and the light source 14 is increased (see FIG. 7A). 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 emission surface 12d (lens portion) can be increased.

Further, by shortening the distance between the incident surface 12a and the light source 14 (see FIG. 7B), the distance between the incident surface 12a and the light source 14 is increased (see FIG. 7A). As compared with the above, light from the light source 14 taken into the lens body 12 increases (β> α). As a result, a highly efficient lens body is obtained.

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 reflective surface 12b is a reflective surface that totally reflects the light incident on the reflective surface 12b out of the light from the light source 14 that has entered the lens body 12, and metal deposition is not used. Of the light from the light source 14 that has entered the lens body 12, the light that has entered the reflecting surface 12 b is internally reflected by the reflecting surface 12 b and travels toward the exit surface 12 d, and is refracted by the exit surface 12 d and travels in the road surface direction. That is, the reflected light RayB internally reflected by the reflecting surface 12b is folded back at the cutoff line and superimposed on the light distribution pattern below the cutoff line. This
A cut-off line is formed at the upper edge of the low beam light distribution pattern.

The reflective surface 12b may be a planar reflective surface that is inclined obliquely forward and downward with respect to the first reference axis AX1 from the lower end edge of the incident surface 12a (see FIG. 14B). The advantage of arranging the reflecting surface 12b so as to be inclined 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 12 c is to make the light source 1 incident inside the lens body 12.
Shields the portion of the light from the 4, formed on the focal F _12d near the exit face 12d (lens unit), luminous intensity distribution including side corresponding to the cut-off line defined in the lower edge by the shade 12c (the light source image) It is to be.

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

As shown in FIGS. 2A and 9A to 9C, the shade 12c includes a side e1 corresponding to the left horizontal cutoff line, a side e2 corresponding to the right horizontal cutoff line, and the left horizontal. An edge e3 corresponding to the oblique cut-off line connecting the cut-off line and the right horizontal cut-off line is included.

The reflective surface 12b is a first reflective region 12b1 between the lower edge of the incident surface 12a and the side e1 corresponding to the left horizontal cutoff line, and between the lower edge of the incident surface 12a and the side e2 corresponding to the right horizontal cutoff line. The second reflection region 12b2, and the first reflection region 12b1 and the second reflection region 1
The third reflection region 12b3 between 2b2 is included.

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 edge of the incident surface 12a, while the second reflection region 12b2 is
It extends in the horizontal direction from the lower end edge of the incident surface 12a toward the front.

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

The shade 12c has a groove corresponding to the left horizontal cut-off line, a groove corresponding to the right horizontal cut-off line, and an oblique cut-off line connecting the left horizontal cut-off line and the right horizontal cut-off line at the tip of the reflecting surface 12b. It can also form by forming the groove part containing the groove part 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 reflecting surface 12b in a side view (see FIG. 10A), or may extend obliquely upward and forward (FIG. 1).
0 (see (b)), and may be curved and extended toward the upper front obliquely (see FIG. 10 (c)). The shade 12c is not limited to these, and may have any shape as long as a part of the light from the light source 14 entering the lens body 12 is shielded so as not to travel toward the exit surface 12d. In addition, you may use the light-shielded light for another light distribution and light guide.

As shown in FIG. 1, the exit surface 12 d is internally reflected by the direct light RayA that travels toward the exit surface 12 d and the reflection surface 12 b of the light from the light source 14 that has entered the lens body 12. A lens in which the focal point F _12d is set in the vicinity of the shade 12c (for example, near the center in the left-right direction of the shade 12c) on the surface from which the reflected light RayB traveling toward 12d is emitted (for example, a convex surface convex forward). It is configured as a part. The exit surface 12d is formed by an exit surface 12d (direct light RayA and reflected light RayB traveling toward the exit surface 12d.
The light intensity distribution (light source image) formed in the vicinity of the focal point F _12d of the lens unit is reversely projected to form a low beam light distribution pattern including a cutoff line at the upper edge.

Note that 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 light intensity distribution (near the focal point F _{12d of} the exit surface 12d (lens portion)) (
And the maximum luminous intensity of the low beam distribution pattern) can be further increased.

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

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

A surface that connects the leading edge of the reflecting surface 12b and the lower edge of the emitting surface 12d is an inclined surface that extends obliquely forward and downward from the leading edge of the reflecting surface 12b. In addition, the surface which connects the front-end edge of the reflective surface 12b and the lower end edge of the output 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 output surface 12d. It may be a surface.
Similarly, the surface connecting the upper end edge of the entrance surface 12a and the upper end edge of the exit surface 12d is the entrance surface 12a.
A planar surface extending in the horizontal direction between the upper edge of the light emitting surface and the upper 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 output 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 configured as described above, the light that has entered the lens body 12 from the incident surface 12a is condensed toward the second reference axis AX2 toward the shade 12c in the vertical direction as shown in FIG. For example, the light is condensed at the center of the shade 12c). And when the surface shape of the incident surface 12a is comprised as shown in FIG. 5, the light which injected into the lens body inside the incident surface 12a is toward the shade 12c regarding a horizontal direction, as shown in FIG. First reference axis AX1
The light is condensed toward the side (for example, the light is condensed at the center of the shade 12c).

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

The low-beam light distribution pattern P1 has a relatively high central luminous intensity and excellent distant visibility. This is because the light source 14 is disposed in the vicinity of the incident surface 12a (in the vicinity of the reference point F) of the lens body 12 in such a posture that the optical axis AX ₁₄ of the light source 14 coincides with the second reference axis AX2. intensity (luminosity) is high light on axis AX ₁₄ of the light (direct light) is condensed on the second reference axis AX2 closer toward the shade 12c (e.g., condensed at the center of the shade 12c) be due to is there.

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

Further, by increasing the inclination of the second reference axis AX2 (see the angle θ shown in FIG. 1) with respect to the first reference axis AX1, the lower edge of the low beam light distribution patterns P1, 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 that has entered the lens body 12 from the incident surface 12a has a 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 collected in the vertical direction and parallel to the horizontal direction and the reflected light RayB internally reflected by the reflection surface 12b travel toward the emission surface 12d and are emitted from the emission surface 12d. . At that time, the direct light RayA and reflected light RayB traveling toward the exit surface 12d, the focal F _12d near the exit face 12d (lens unit), corresponding to the cutoff line CL1~CL3 defined in the lower edge by the shade 12c A luminous intensity distribution (light source image) including a side to be formed is formed. 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 edge shown in FIG. 11C on the virtual vertical screen. The low beam light distribution pattern P3 shown in FIG. 11C is more diffused in the horizontal direction than the low beam light distribution pattern P1 shown in FIG.

Next, the relationship between the light source image by the light from the light source 14 that has entered 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 of the cross sections Cs1 to Cs3.

As shown in FIG. 12, the outer shapes of the light source images I _Cs1 and I _Cs2 in the cross sections Cs1 and Cs2 are as follows:
It is the same as the outer shape of the light source (similar to the outer shape of the light source 14 and large 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 shapes of the cut-off lines CL1 to C1 are defined by the shade 12c at the lower edge.
The sides e1, e2, and e3 corresponding to L3 are included. The light source image I _Cs3 is output from the emission surface 12.
Inverted by the action of d (lens portion), the edges e1, e2, and e3 corresponding to the cut-off lines CL1 to CL3 defined by the shade 12c are included at the upper end edge.

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

Next, regarding the advantage of disposing the reflecting surface 12b with respect to the first reference axis AX1,
The description will be made in comparison with the case where the reflecting surface 12b is arranged in the horizontal direction.

The first advantage is that stray light can be reduced and efficiency can be increased 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 the direction not entering the exit 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 inclined with respect to the first reference axis AX1, the reflection is reflected from the reflecting surface 12b and proceeds toward the emitting surface 12d. The light RayB increases, and the light captured by the emission surface 12d (the reflected light reflected from the inner surface by the reflection surface 12b) increases. As a result, the stray light can be reduced and the efficiency can be increased 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 disposed with an inclination of 5 ° with respect to the first reference axis AX1, the efficiency increases by 33.8%, and when the reflection surface 12b is disposed with an inclination of 10 °,
Efficiency increased by 60%.

The second advantage is that the lens body 12 can be reduced in size 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 the direction not entering the exit surface 12d. It becomes. The exit surface 12d can capture stray light RayB 'by extending it upward as shown in FIG. 14 (a), but the exit surface 12d becomes larger as it extends upward.

On the other hand, as shown in FIG. 14B, when the reflecting surface 12b is inclined with respect to the first reference axis AX1, the exit surface 12d has more light (without extending it upward). The reflected light RayB) internally reflected by the reflecting surface 12b can be taken in. As a result, as compared with the case where the reflecting surface 12b is arranged in the horizontal direction, it is possible to reduce the size of the exit surface 12d (and thus the lens body 12).

In the simulation performed by the inventors of the present application, when the reflecting surface 12b is inclined at 5 ° with respect to the first reference axis AX1, the height A (light emitted from the emitting surface 12d) shown in FIG. 14 (a) is reduced by 8% compared to the case shown in FIG. 14 (a), and the height A shown in FIG. 14 (b) is shown in FIG. Compared to the case shown, it decreased by 18.1%.

Next, the second reference axis AX2 is arranged so as to be inclined with respect to the first reference axis AX1, and the light from the light source 14 incident on the lens body 12 enters the second reference axis toward the shade 12c at least in the vertical direction. Regarding the advantage of condensing near AX2, the second reference axis AX2 is arranged in the horizontal direction, and the light from the light source 14 incident on the lens body 12 is at least in the vertical direction.
A description will be given in comparison with the case where light is condensed 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 lens body 12 is directed toward the shade 12c at least in the vertical direction.
Compared to the case of focusing near 2, it is possible to achieve stray light reduction and higher efficiency.

That is, as shown in FIG. 15 (a), the second reference axis AX2 is arranged in the horizontal direction, and the light from the light source 14 incident on the lens body 12 is at least in the vertical direction with respect to the shade 12c.
The light source 1 incident on the inside of the lens body 12 when being condensed toward the second reference axis AX2
Most of the light from 4 is blocked by the shade 12c. As a result, efficiency is greatly reduced. Further, in FIG. 15A, assuming that a reflecting surface corresponding to the reflecting surface 12b is added, the reflected light that is internally reflected by the reflecting surface becomes stray light that travels in a direction not incident on the exit surface 12d.

On the other hand, as shown in FIG. 15B, the second reference axis AX2 is inclined with respect to the first reference axis AX1, and the light from the light source 14 incident on the lens body 12 is at least vertically. When the light is condensed toward the second reference axis AX2 toward the shade 12c, the exit surface 1
The light taken in by 2d (the reflected light RayB internally reflected by the reflecting surface 12b) increases. As a result, the second reference axis AX2 is arranged in the horizontal direction, and the light from the light source 14 incident on the lens body 12 is condensed toward the second reference axis AX2 toward the shade 12c at least in the vertical direction. Compared to the above, the stray light can be reduced and the efficiency can be increased.

As described above, according to the present embodiment, firstly, it is possible to provide the lens body 12 and the vehicle lamp 10 using the lens body 12 in which the reflective surface by metal vapor deposition that causes a cost increase is omitted. Second, the lens body 12 that can prevent the lens body 12 from melting or the output of the light source 14 from being lowered due to the heat generated in the light source 14 and a vehicle lamp 10 using the lens body 12 are provided. can do.

The light source 1 can omit the reflective surface by metal vapor deposition which causes an increase in cost.
The light from 4 is not a reflection surface by metal vapor deposition, but the refraction and reflection surface 12b at the incident surface 12a.
This is because it is controlled by the internal reflection at.

The reason why the lens body 12 can be prevented from melting or the output of the light source 14 from being lowered due to the heat generated by the light source 14 is that the incident surface 12a is formed at the rear end of the lens body 12. This is because the light source 14 is disposed outside the lens body 12 (that is, at a position separated from the incident surface 12a of the lens body 12).

Next, a vehicular lamp that is a second embodiment of the present invention will be described with reference to the drawings.

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

When comparing the vehicular lamp 10A of the present embodiment with the vehicular lamp 10 of the first embodiment,
The two differ mainly in the following points.

First, in the vehicular lamp 10 according to the first embodiment, the light exit surface 12d, which is the final light exit surface of the lens body 12, is mainly responsible for horizontal light collection and vertical light collection. On the other hand, in the vehicular lamp 10A according to the present embodiment, the first lens unit 12 mainly collects light in the horizontal direction.
The first emission surface 12A1a of A1 is in charge, and the second emission surface 12A2b of the second lens portion 12A2, which is the final emission surface of the lens body 12A, is mainly in charge of condensing in the vertical direction. That is, the vehicle lamp 10A of the present embodiment adopts the concept of “decomposing the light collecting function”.

Secondly, in the vehicular lamp 10 according to the first embodiment, the light exit surface 12d, which is the final light exit surface of the lens body 12, is hemispherical in order to perform horizontal light collection and vertical light collection. (Refer to FIG. 2 (a)), the vehicular lamp 10A according to the present embodiment is in charge of condensing in the horizontal direction. The first light exit surface 12A1a of the lens portion 12A1 is configured as a semi-cylindrical surface (semi-cylindrical refractive surface) extending in the vertical direction (see FIG. 23), and is in charge of condensing light in the vertical direction. 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 refractive surface) extending in the horizontal direction (see FIG. 23).

Third, in the vehicular lamp 10 according to the first embodiment, the exit surface 12d, which is the final exit surface of the lens body 12, is configured as a hemispherical surface (semi-columnar refractive surface). Even if a plurality of vehicle lamps 10 (a plurality of lens bodies 12) are arranged in a line (see FIG. 18), the appearance of the dots is continuous, and the vehicle lamp has a sense of unity that extends in a line in a predetermined direction. On the other hand, in the vehicular lamp 10A of the present embodiment, the second exit surface 12A2b, which is the final exit surface of the lens body 12A, extends in the horizontal direction. As a result of being configured as a columnar surface (a semi-cylindrical refractive surface), a plurality of vehicle lamps 10A
By arranging (a plurality of lens bodies 12A) in a line (see FIGS. 19A and 19B), a vehicular lamp (lens coupling body 16) having a sense of unity extending in a line shape in the horizontal direction can be obtained. )
The point that can be configured. FIG. 18 is a top view showing a state in which a plurality of vehicle lamps 10 (a plurality of lens bodies 12) of the first embodiment are arranged in a line.

Other than that, it is the structure similar to the vehicle lamp 10 of the said 1st Embodiment. Hereinafter, the difference from the vehicular lamp 10 of the first embodiment will be mainly described, and the vehicular lamp 10 of the first embodiment will be described.
The same components as those in FIG.

As shown in FIGS. 16 and 17B, the vehicular lamp 10A according to the present embodiment includes a light source 14, a first lens unit 12A1, and a second lens unit 12A2, and the light from the light source 14 is converted into the first lens. The first lens unit 1 enters the first lens unit 12A1 from the first incident surface 12a of the unit 12A1.
After being partially shielded by the shade 12c of 2A1, the light exits from the first exit surface 12A1a of the first lens portion 12A1, and further from the second entrance surface 12A2a of the second lens portion 12A2.
A virtual vertical screen facing the front of the vehicle (disposed approximately 25 m forward from the front of the vehicle) by entering the inside of the lens 12A2 and exiting from the second exit surface 12A2b of the second lens 12A2 and irradiating forward. The shade 12c is placed on the upper edge shown in FIG.
Low beam distribution pattern P including cut-off lines CL1 to CL3 defined by
Lens body 12A configured to form 1a and the like (corresponding to the predetermined light distribution pattern of the present invention)
It is comprised as a vehicle headlamp provided with.

21A is a top view of the lens body 12A of the second embodiment, FIG. 21B is a side view, and FIG.
1 (c) is a bottom view. FIG. 22 shows an example (cross-sectional view) of the first incident surface 12a, and FIG.
It is a perspective view for demonstrating lens body 12A (1st output surface 12A1a, 2nd entrance surface 12A2a, and 2nd output surface 12A2b) of embodiment.

As shown in FIGS. 17A and 21A to 21C, the lens body 12A is a lens body having a shape extending along a first reference axis AX extending in the horizontal direction. Part 12A1, second lens part 12A2, and connecting part 12A3 connecting first lens part 12A1 and second lens part 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 a reference point F in optical design disposed in the vicinity of the first incident surface 12a. The second lens portion 12A2 includes a second entrance surface 12A2a and a second exit surface 12A2b. First entrance surface 12a, reflection surface 12b, shade 12c, first exit 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 unit 12A1 and the second lens unit 12A2 are coupled by a coupling unit 12A3.

The connecting portion 12A3 is such that the first lens portion 12A1 and the second lens portion 12A2 are surrounded by the first exit surface 12A1a, the second incident surface 12A2a, and the connecting portion 12A3 (the other portions are opened). The space S is connected in a formed state.

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

The space S is formed by a mold having a pulling direction opposite to the connecting portion 12A3 (see an arrow in FIG. 17A). In order to smoothly remove the mold, the first exit surface 12A1a and the second entrance surface 12A2a are set with draft angles α and β (also referred to as draft angle, preferably 2 ° or more). Accordingly, it is possible to perform die cutting by upper and lower punching at the time of molding, and the lens body 12 (and a lens coupling body 16 described later) can be manufactured at a low cost by one die cutting (without using a slide). The material of the lens body 12A may be a 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.
a surface (for example, a free-form surface convex toward the light source 14) on which light from the light source 14 (precisely, the reference point F in the optical design) is refracted and enters the first lens unit 12A1. )so,
The light from the light source 14 that has entered the first lens unit 12A1 is shade 1 in the vertical direction.
The light is condensed toward the second reference axis AX2 toward 2c (see FIG. 17B), and the light is condensed toward the first reference axis AX1 toward the shade 12c in the horizontal direction (see FIG. 22). Further, the surface shape is configured. The first reference axis AX is a point near the shade 12c (for example,
It passes through the focal point F _12A4 ) and extends in the vehicle longitudinal direction. The second reference axis AX2 passes through the center of the light source 14 (more precisely, the reference point F) and a point in the vicinity of the shade 12c (for example, the focal point F _12A4 ), and obliquely forward with respect to the first reference axis AX1. Inclined downward. Note that the first incident surface 12a is such that the light from the light source 14 that has entered the first lens portion 12A1 is parallel to the reference axis AX1 in the horizontal direction (see FIG. 6). The shape may be configured.

The first emission surface 12A1a is light from the light source 14 that is emitted from the first emission surface 12A1a,
That is, the first emission surface 12 out of the light from the light source 14 that has entered the first lens unit 12A1.
The first light exit surface 12 is reflected by the direct light traveling toward A1a and internally reflected by the reflection surface 12b.
This is a surface for collecting 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 cylindrical axis is configured as a semi-cylindrical surface extending in the vertical direction. The focal line of the first emission 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 portion of the second lens portion 12A2, and the first emission surface 12 is formed.
The surface from which the light from the light source 14 emitted from A1a enters the second lens portion 12A2, for example, is configured as a planar surface. Of course, not limited to this, the second incident surface 12A2
a may be configured as a curved surface.

The second emission surface 12A2b is a surface that condenses light from the light source 14 emitted from the second emission surface 12A2b in the vertical direction (corresponding to the second direction of the present invention). Specifically, as shown in FIG. 23, the cylindrical axis is configured as a semi-cylindrical surface extending in the horizontal direction. The focal 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 emission surface 12A1a and the second lens portion 12A2 (second incidence surface 12A2a and second emission surface 12A2b) having the above _{configuration} is the focal point F _12d of the emission surface 12d of the first embodiment. In the same manner as above, it is set near the shade 12c (for example, near the center in the left-right direction of the shade 12c). This lens 12A4 is similar to the light exit surface 12d of the first embodiment, and the light from the light source 14 incident on the inside of the first lens portion 12A1, ie, the first
Of the light from the light source 14 that has entered the lens unit 12A1, the direct light that travels toward the first exit surface 12A1a and the reflected light that travels toward the first exit surface 12A1a after being internally reflected by the reflection surface 12b. , A luminous intensity distribution (near the focal point F _{12A4 of the} lens 12A4)
A light source image) is reversely projected to form a low beam light distribution pattern P1a including cut-off lines CL1 to CL3 on the upper edge shown in FIG.

The basic surface shape of the second emission surface 12A2b is as described above, but the first emission surface 12A.
Since the draft angles α and β are set in 1a and the second incident surface 12A2a, the following adjustments are actually made.

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

That is, when the extraction angles α and β are set in the first exit surface 12A1a and the second entrance surface 12A2a, as shown in FIG. 24, the method passes through the centers of the first exit surface 12A1a and the second entrance surface 12A2a. The lines N _12A1a and N _12A2a are inclined with respect to the horizontal. In this case, the second exit surface 1
If the normal line N _12A2b passing through the center of _2A2b extends in the horizontal direction, the light from the light source 14 emitted from the second emission surface 12A2b becomes light that travels obliquely upward with respect to the horizontal, causing glare. There is a fear.

In order to suppress this, the surface shape of the second emission surface 12A2b is adjusted so that light from the light source 14 emitted from the second emission surface 12A2b becomes light parallel to the first reference axis AX1. ing. For example, the normal line N _{12 of} the second emission surface 12A2b is such that the light from the light source 14 emitted from the second emission surface 12A2b becomes light parallel to the first reference axis AX1.
_A2b is adjusted to have a surface shape that is inclined forward and obliquely upward. This adjustment is finally adjusted to adjust the focus F _{12A4 of the} lens 12A4 including the first exit surface 12A1a and the second lens portion 12A2 (the second entrance surface 12A2a and the second exit surface 12A2b) near the position of the shade 12c. It is. A line with an arrow at the tip in FIG. 24 represents an optical path of light from the light source 14 (more precisely, the reference point F) incident on the lens body 12A.

The surface connecting the leading edge of the reflecting surface 12b and the lower edge of the first emitting surface 12A1a is the reflecting surface 12.
Although it is set as the inclined surface extended toward the front diagonally downward from the front-end edge of b, it is not restricted to this, 2nd
Any surface may be used as long as it does not block light from the light source 14 traveling toward the emission surface 12A2b. Similarly, the upper surface of the lens body 12A, that is, the surface connecting the upper end edge of the first entrance surface 12a and the upper end edge of the second exit surface 12A2b is a surface extending in a substantially horizontal direction. Not limited to any surface as long as it does not block the light from the light source 14 traveling toward the second emission surface 12A2b. Similarly, both side surfaces of the lens body 12A, that is,
The surface connecting the left and right edges of the first entrance surface 12a and the left and right edges of the second exit surface 12A2b is the first
The inclined surface narrows in a tapered shape toward the incident surface 12a (see FIG. 21A), but is not limited thereto, and the surface does not block the light from the light source 14 traveling toward the second emission surface 12A2b. Any surface may be used.

In the vehicular lamp 10A (lens body 12A) having the above-described configuration, the light from the light source 14 is transmitted from the first incident surface 12a of the first lens unit 12A1 to the first lens unit 1 as shown in FIG.
The light enters the inside of 2A1 and is partially shielded by the shade 12c of the first lens unit 12A1, and then exits from the first exit surface 12A1a of the first lens unit 12A1. In that case, the 1st output surface 12
The light from the light source 14 emitted from A1a is condensed in the horizontal direction by the action of the first emission surface 12A1a (see FIG. 22; it is not collected or hardly collected in the vertical direction). Then, the light from the light source 14 emitted from the first emission surface 12A1a passes through the space S, and further enters the second lens unit 12A2 from the second incident surface 12A2a of the second lens unit 12A2. The light exits from the second exit surface 12A2b of the lens portion 12A2 and is irradiated forward. At that time, the light from the light source 14 emitted from the second emission surface 12A2b is reflected by the second emission surface 12A2.
Due to the action of b, light is condensed in the vertical direction (see FIG. 17B). Thus, FIG. 20 (a) is displayed on the virtual vertical screen.
) Etc., the cut-off lines CL1 to CL3 defined by the shade 12c at the upper end edge shown in FIG.
And the like (corresponding to the predetermined light distribution pattern of the present invention).

The low beam light distribution pattern P1a and the like have a relatively high central luminous intensity and are excellent in distance visibility. This is because the light source 14 is disposed in the vicinity of the incident surface 12a (in the vicinity of the reference point F) of the lens body 12A in an attitude in which the optical axis AX ₁₄ of the light source 14 coincides with the second reference axis AX2. intensity (luminosity) is high light on axis AX ₁₄ of the light (direct light) is condensed on the second reference axis AX2 closer toward the shade 12c (e.g., condensed at the center of the shade 12c)
It is because.

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

FIG. 19A 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 line in the horizontal direction, and FIG. 19B is a top view.

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

By using the lens combined body 16 having the above-described configuration, it is possible to configure a vehicular lamp that looks good with a sense of unity extending in a line shape in the horizontal direction. The lens combination 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,
The following effects can be achieved.

That is, first, the lens body 12A having a sense of unity extending in a line shape in the horizontal direction.
(Lens combined body 16) and vehicle lamp 10A using the same can be provided. Second
In addition, although the final emission surface, the second emission surface 12A2b is a semi-cylindrical surface (a semi-cylindrical refracting surface extending in the horizontal direction), the low beam condensed 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 lamp 10A using the same.

The appearance with a sense of unity extending in a line shape in the horizontal direction is that the second emission surface 12A2b which is the final emission surface is a semi-cylindrical surface (a semi-cylindrical refractive surface extending in the horizontal direction). )
It is because it is comprised as.

Even though the second emission surface 12A2b, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refracting surface extending in the horizontal direction), the arrangement for low beam condensed in the horizontal direction and the vertical direction is used. The light pattern P1a and the like can be formed mainly by focusing the light in the horizontal direction on the first lens unit 12.
The first exit surface 12A1a (a semi-cylindrical refracting surface extending in the vertical direction) of A1 is in charge of the second lens portion 12A2, which is the final exit surface of the lens body 12A, mainly focusing in the vertical direction. This is because the two exit surfaces 12A2b (a semi-cylindrical refracting surface extending in the horizontal direction) are in charge. That is, it is due to the decomposition of the light collecting function.

Further, according to the present embodiment, although the extraction angles α and β are set in the first emission surface 12A1a and the second incidence surface 12A2a, the emission is made from the second emission surface 12A2b that is the final emission surface. Provided is a lens body 12A (lens coupling body 16) suitable for a vehicular lamp, and a vehicular lamp 10A using the same, in which light from the light source 14 is parallel to the first reference axis AX1. Can do.

  Next, a modified example will be described.

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

As shown in FIG. 25, the lens body 12B of this modification is molded in a state where the first lens portion 12A1 and the second lens portion 12A2 are physically separated, and the both are connected by a holding member 18 such as a lens holder. (Holding). The first exit surface 12A1a and the second entrance surface 12A2a are not set with the draft angles α and β, and are plane surfaces (or curved surface shapes) orthogonal to the reference axis AX1, respectively.

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

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

The lens body 12C of this modification corresponds to a lens body obtained by replacing the first emission surface 12A1a and the second emission surface 12A2b) of the second embodiment.

That is, the first exit surface 12A1a of the lens body 12C of the present modification is the first exit surface 12
This is a surface for condensing 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 cylinder axis is configured as a semi-cylindrical surface extending in the horizontal direction. In this case, the focal line of the first emission surface 12A1a is shade 1
It extends in the horizontal direction in the vicinity of 2c. Further, the second emission surface 12A2b of the lens body 12C of the present modification is a surface that condenses light 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 cylinder axis is configured as a semi-cylindrical surface extending in the vertical direction. In this case, the focal 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 composed of the first exit surface 12A1a and the second lens portion 12A2 (the second entrance surface 12A2a and the second exit surface 12A2b) of the lens body 12C of this modification is the same as in the second embodiment. It is set near the shade 12c (for example, near the center in the left-right direction of the shade 12c).

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

As shown in FIG. 27, the lens combination 16C includes a plurality of lens bodies 12C. The lens coupling body 16C (the plurality of lens bodies 12C) is integrally molded (injection molding) by injecting a transparent resin such as polycarbonate or acrylic into a mold, and cooling and solidifying.
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 semi-cylindrical exit surface group having a sense of unity extending in a line shape in the vertical direction. doing.

By using the lens combined body 16C having the above-described configuration, it is possible to configure the vehicular lamp 10C having a sense of unity extending in a line shape in the vertical direction. The lens combination 16C is
The plurality of lens bodies 12C may be molded in a physically separated state and connected (held) by a holding member (not shown) such as a lens holder.

According to this modified example, first, 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 vehicular lamp 10C using the lens body 12C. Second, although the final emission surface, the second emission surface 12A2b, is a semi-cylindrical surface (a semi-cylindrical refracting surface extending in the vertical direction), the light is condensed in the horizontal direction and the vertical direction. The lens body 12C (lens combined body 1) that can form the low beam light distribution pattern P1a and the like.
6C) and a vehicle lamp 10C using the same can be provided.

The appearance with a sense of unity extending in a line shape in the vertical direction is that the second emission surface 12A2b which is the final emission surface is a semi-cylindrical surface (a semi-cylindrical refractive surface extending in the vertical direction). )
It is because it is comprised as.

Even though 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 arrangement for low beams condensed in the horizontal direction and the vertical direction is used. The light pattern P1a and the like can be formed mainly by focusing the light in the vertical direction.
The first exit surface 12A1a of A1 (a semi-cylindrical refracting surface extending in the horizontal direction) takes charge of the second lens portion 12A2, which is the final exit surface of the lens body 12A, mainly focusing in the horizontal direction. This is because the two exit surfaces 12A2b (a semi-cylindrical refracting surface extending in the vertical direction) are in charge. That is, it is due to the decomposition of the light collecting function.

The concept of “decomposing the light collecting function” described in the second embodiment is not limited to the vehicular lamp 10 of the first embodiment, and the final emission surface is a hemispherical surface (a hemispherical refractive surface). )
The present invention can be applied to any vehicular lamp (for example, a vehicular lamp described in JP-A-2005-228502 described in the background art). Hereinafter, this point will be described using the third embodiment and the fourth embodiment.

Next, as a third embodiment, a direct projection type vehicular lamp 20 to which the concept of “decomposing the light collecting function” described in the second embodiment is applied will be described.
Hereinafter, the same components as those of the vehicle lamp 10A of the second embodiment are denoted by the same reference numerals, and the description thereof is omitted.

FIG. 28 is a schematic view of a direct projection type vehicular lamp 20 to which the concept of “disassembling the light collecting function” is applied.

As shown in FIG. 28, the direct projection type vehicular lamp 20 of the present embodiment includes a light source 14, a shade 22, a first lens unit 12 </ b> A <b> 1, and a second lens unit 12 </ b> A <b> 2, and light from the light source 14 is shaded 22. After being partially shielded by the first lens portion 12A1, the first lens portion 12A1 enters the first lens portion 12A1 from the first incident surface 12A1b, exits from the first exit surface 12A1a of the first lens portion 12A1, and further the second lens. Part 12A2 second incident surface 12A2a
Enters the second lens portion 12A2 and enters the second lens portion 12A2 and the second exit surface 12A2b of the second lens portion 12A2.
The light beam distribution pattern P1a for the low beam including the cut-off lines CL1 to CL3 defined by the shade 22 at the upper end edge shown in FIG. The vehicle headlamp includes a lens body configured to form a predetermined light distribution pattern according to the present invention.

That is, the direct projection type vehicular lamp 20 of the present embodiment uses a convex lens (a convex lens whose final emission surface is a hemispherical surface) used in a general direct projection type vehicular lamp as a first lens. This corresponds to the part replaced with the part 12A1 and the second lens part 12A2. The focal point F _{12A5 of the} lens 12A5 including the first lens portion 12A1 and the second lens portion 12A2 is in the vicinity of the upper edge of the shade 22 disposed 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 surface (or curved surface shape) orthogonal to the reference axis AX1.

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

In addition, the shade 22 is abbreviate | omitted from the structure shown in FIG. 28, and each surface 12A1a, 12A1b, 1
By adjusting 2A2a and 12A2b, a vehicular lamp that forms the high beam light distribution pattern P _Hi shown in FIG. 29 on the virtual vertical screen can be configured. In this case, the light from the light source 14 is transmitted from the first incident surface 12A1b of the first lens unit 12A1 to the first lens unit 12A.
1 enters and exits from the first exit surface 12A1a of the first lens portion 12A1. that time,
The light from the light source 14 emitted from the first emission surface 12A1a is condensed in the horizontal direction by the action of the first emission surface 12A1a (not collected or hardly collected in the vertical direction). Then, the light from the light source 14 emitted from the first emission surface 12A1a passes through the space S, and further enters the second lens unit 12A2 from the second incident surface 12A2a of the second lens unit 12A2. The light exits from the second exit surface 12A2b of the lens portion 12A2 and is irradiated forward. At that time, the light from the light source 14 emitted from the second emission surface 12A2b is reflected on the second emission surface 12A.
By the action of 2b, the light is collected in the vertical direction (the light is not collected or hardly collected in the horizontal direction). Thus, 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 (
This is an example of a high beam light distribution pattern P _Hi formed on the front side of the vehicle (approximately 25 m ahead).

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

FIG. 30 is a schematic diagram of a projector-type vehicular lamp 30 to which the above-described concept of “decomposing the light collecting function” is applied.

As shown in FIG. 30, the projector-type vehicular lamp 30 according to the present embodiment includes a light source 14, a reflector 32 (elliptic reflecting surface), a shade 34, a first lens unit 12A1, and a second lens unit 12A2. After the light from 14 is reflected by the reflector 32 and partially shielded by the shade 34, the first lens unit 1 passes through the first incident surface 12A1b of the first lens unit 12A1.
2A1 enters the first lens portion 12A1, exits from the first exit surface 12A1a, and further enters the second lens portion 12A2 from the second entrance surface 12A2a of the second lens portion 12A2, and enters the second lens portion 12A2. Is emitted from the second emission surface 12A2b and irradiated forward, so that the low beam light distribution pattern P1a including the cut-off lines CL1 to CL3 defined by the shade 34 at the upper edge on the virtual vertical screen (the present invention) This is a vehicular headlamp including a lens body configured to form a predetermined light distribution pattern.

That is, the projector-type vehicular lamp 30 of the present embodiment includes a convex lens (a convex lens whose final emission surface is a hemispherical surface) used in a general projector-type vehicular lamp, and the first lens portion 12A1. This corresponds to the replacement with the second lens portion 12A2. The shade 32 is a lens 12A5 including a first lens unit 12A1 and a second lens unit 12A2.
The mirror surface extends substantially horizontally from the vicinity of the focal point F _12A5 toward the rear. The focal point F _{12A5 of the} lens 12A5 composed of the first lens unit 12A1 and the second lens unit _12A2 is:
It is set near the tip edge of the shade 34. The first focal point F1 of the reflector 32 (elliptic reflecting surface) is set near the light source 14, and the second focal point F2 is the focal point F _{12A5 of the} lens 12A5 including the first lens unit 12A1 and the second lens unit 12A2. It is almost coincident. In addition,
Unlike the second embodiment, the first incident surface 12A1b has a plane shape (or curved surface shape) orthogonal to the reference axis AX1.

In the vehicular lamp 30 configured as described above, the light from the light source 14 is reflected by the reflector 32 and partially blocked by the shade 34, and then the first incident surface 12A of the first lens portion 12A1.
The first light exit surface 12A of the first lens unit 12A1 enters the first lens unit 12A1 from 1b.
It exits from 1a. At that time, the light from the light source 14 emitted from the first emission surface 12A1a is condensed in the horizontal direction by the action of the first emission surface 12A1a (not condensed or hardly collected in the vertical direction). Then, the light source 14 emitted from the first emission 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.
Enters the second lens portion 12A2 and enters the second lens portion 12A2 and the second exit surface 12A2b of the second lens portion 12A2.
It is emitted from and irradiated forward. At that time, the light from the light source 14 emitted from the second emission surface 12A2b is condensed in the vertical direction (not condensed or hardly collected in the horizontal direction) by the action of the second emission surface 12A2b. With the above, on the virtual vertical screen,
Cut-off line CL1 defined by the shade 34 at the upper edge shown in FIG.
-Light distribution pattern P1a for low beam including CL3, etc. (corresponding to the predetermined light distribution pattern of the present invention)
Is formed.

In addition, the shade 34 is abbreviate | omitted from the structure shown in FIG. 30, and the reflector 32 (elliptic-type reflective surface)
By adjusting the above, it is possible to configure the vehicle headlamp 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
The light is reflected by the reflector 32, enters the first lens unit 12A1 from the first incident surface 12A1b of the first lens unit 12A1, and exits from the first output surface 12A1a of the first lens unit 12A1. At that time, the light from the light source 14 emitted from the first emission surface 12A1a is the first emission surface 12A1.
Due to the action of a, the light is condensed in the horizontal direction (not condensed or hardly condensed in the vertical direction). Then, the light from the light source 14 emitted from the first emission surface 12A1a passes through the space S, and further enters the second lens unit 12A2 from the second incident surface 12A2a of the second lens unit 12A2. The light exits from the second exit surface 12A2b of the lens portion 12A2 and is irradiated forward. At that time, the light from the light source 14 emitted from the second emission surface 12A2b is condensed in the vertical direction by the action of the second emission surface 12A2b (not collected or hardly collected in the horizontal direction). Thus, the high beam light distribution pattern P _Hi illustrated in FIG. 29 is formed on the virtual vertical screen.

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

FIG. 31 (a) is a side view of the vehicular lamp 10D with a camber angle (only the main optical surface), FIG. 31 (b) is a top view (only the main optical surface), and FIG. 31 (c) is a vehicular lamp. It is an example of the light distribution pattern for low beams formed by 10D. 31 (d) to 31 (f) are comparative examples, and FIG. 31 (d) is a side view of the vehicular lamp 10A according to the second embodiment in which a camber angle is not given (only the main optical surface), FIG. (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. 31 (b), the vehicular lamp 10D of the present embodiment is configured so that the second lens portion 12A2 of the vehicular lamp 10A of the second embodiment is in a top view with respect to the first reference axis AX1. The inclined surface, that is, the second emission surface 12A2b of the vehicle lamp 10A of the second embodiment is a semi-cylindrical surface extending in a direction inclined by a predetermined angle with respect to the first reference axis AX1 when viewed from above. This corresponds to a configuration (that is, a camber angle θ1 (for example, θ1 = 30 °)).

As a result of a simulation confirmed by the present inventors, when only the camber angle θ1 is given, as shown in FIG. 32, the distance between the first exit surface 12A1a and the second entrance surface 12A2a is set to the first reference axis AX1. On both sides (see arrows B and C in FIG. 32), the focal position F _{B of the} light emitted from the B position of the first emission surface 12A1a and the focal position F _{C of the} light emitted from the C position are greatly shifted. As a result, as shown in FIG. 33, the side where the distance between the first exit surface 12A1a and the second entrance surface 12A2a is widened in the low beam distribution pattern formed on the virtual vertical screen (the right side in FIG. 33). ) Was found to be out of focus without condensing.

  The cause of this blurring will be described as follows with reference to the drawings.

FIG. 34A is a cross-sectional view (only the main optical surface) at the position B shown in FIG.
) Tip arrows with lines in represents the optical path followed by the light RAY1 _B at an incident angle with respect to the first exit surface 12A1a (B position). FIG. 34B is a cross-sectional view at the position C shown in FIG. 32 (only the main optical surface). A line with an arrow at the tip in FIG. 34B is relative to the first emission surface 12A1a (position C). The light R incident at the same incident angle as shown in FIG.
It represents the optical path followed by ay1 _C. For convenience of explanation, FIG. 34 (a) and FIG. 34 (b
), The first exit surface 12A1a and the second entrance surface 12A2 with no draft angle set.
Although a is drawn, the same applies when a draft angle is set.

As shown in FIG. 34 (b), at the position C, the distance between the first exit surface 12A1a and the second entrance surface 12A2a is wider than at the position B (see FIG. 34 (a)). Therefore, the incident position on the second incident face 12A2a light RAY1 _C becomes lower than the incident position on the second incident face 12A2a light RAY1 _B shown in FIG. 34 (a), the light Ray incident from the incident position of the lower
1 _C is directed upward with respect to the horizontal as shown in FIG. As a result, the blur occurs.

As a result of diligent studies to improve the blur, the present inventors have improved the blur by adjusting the surface shape of the first emission surface 12A1a, and the light distribution pattern for low beam is totally condensed. (See FIG. 31 (c)).

Based on this knowledge, the first emission surface 12A1a of the present embodiment is a semi-cylindrical surface extending in the vertical direction, and the low beam light distribution pattern is entirely condensed (see FIG. 31C). The surface shape is adjusted as follows. In this adjustment, the shifted focal positions F _B , F _{C and the} like are shaded 12.
The adjustment is performed to match the vicinity of the position c, and is performed using predetermined simulation software. 35A is a perspective view of the vehicular lamp 10D of the fifth embodiment (only the main optical surface), and FIG. 35B is a comparative example, and is a perspective view of the vehicular lamp 10A of the second embodiment (main optical). Surface only). Referring to FIG. 35 (a), the first emission surface 12 of the present embodiment adjusted as described above.
It can be seen that A1a has an asymmetric shape 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.
The configuration is the same as A.

According to this 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 combined body) provided with a camber angle
And the vehicle lamp using the same can be provided. That is, it is possible to provide an excellent-looking lens body (lens combined body) that extends 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 lens body. it can. Second, the light distribution for low beam condensed in the horizontal direction and the vertical direction even though the second emission surface 12A2b which is the final emission surface is a semi-cylindrical surface (a semi-cylindrical refractive surface). A lens body (lens combined body) capable of forming a pattern and a vehicular lamp using the lens body can be provided.
Thirdly, it is possible to provide a lens body (lens combined body) in which the low-beam light distribution pattern is entirely collected despite the camber angle being provided, and a vehicular lamp using the lens body.

The second output surface 12A2b, which is the final output surface, has a semi-cylindrical surface (line shape) extending in a line shape in a direction inclined by a predetermined angle with respect to the first reference axis AX1. This is because the second exit surface 12A2b extends in a direction inclined with respect to the first reference axis AX1 when viewed from above.

Even though the second emission surface 12A2b, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refractive surface), a light distribution pattern for low beam condensed in the horizontal direction and the vertical direction is formed. The first light exit surface 12A1 of the first lens portion 12A1 can mainly condense in the horizontal direction.
a (semi-cylindrical refracting surface) takes charge of 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, mainly focusing in the vertical direction. ) Is in charge. That is, it is due to the decomposition of the light collecting function.

Although the camber angle is given, the light distribution pattern for the low beam is totally collected by the first emission surface 12A1a having a semi-cylindrical surface extending in the vertical direction. This is because the surface shape is adjusted so that the light distribution pattern is totally condensed.

Note that the idea of “giving a camber angle” described in the present embodiment and the idea of improving the above-described blur caused by the provision of the camber angle as described above are as follows.
The present invention is not limited to the vehicular lamp 10A (lens body 12A) of the second embodiment, but can be applied to the respective modifications, the vehicular lamp (lens body) of the third and fourth embodiments, and the like. Similarly, the tenth described later.
The present invention can also be applied to the vehicular lamp 10J (lens body 12J) of the embodiment.

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

  FIG. 36 is a front view of the vehicular lamp 10E with a slant angle.

As shown in FIG. 36, the vehicular lamp 10E of the present embodiment is obtained by tilting the second lens portion 12A2 of the vehicular lamp 10A of the second embodiment with respect to the horizontal in a front view, that is, the above-described The second emission surface 12A2b of the vehicular 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 (ie, a slant angle θ2 ( For example, it is equivalent to that given θ2 = 12 °). Specifically, the second lens portion 12A2 (second emission surface 12A2b) of the present embodiment is centered on the first reference axis AX1 with the second lens portion 12A2 (second emission surface 12A2b) of the second embodiment. Corresponds to a rotation of a predetermined angle θ2.

As a result of a simulation confirmed by the present inventors, only by providing the slant angle θ2, the focal line of the second lens portion 12A2 is inclined with respect to the shade 12c. As a result, FIG.
As shown in FIG. 7B, it was found that the light distribution pattern for low beam formed on the virtual vertical screen is in a rotated state (or a blurred state). FIG. 37A is a diagram for explaining problems that appear in the low beam light distribution pattern when a slant angle is given, and FIG. 37B is a diagram schematically showing FIG. 37A.

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

The reason why the rotation (or blurred state) is suppressed will be described as follows with reference to the drawings.

52A is a side view of the vehicular lamp 10E (lens body 12A) of the present embodiment (only the main optical surface from which the first emission surface 12A1a is omitted), and FIG. 52B is a top view (first emission surface). 12A1
only the main optical surface from which a is omitted), and in both cases, the lens body 12A from the second exit surface 12A2b.
The optical path (namely, the result of reverse ray tracing) followed by the parallel ray RayAA incident on the inside is shown.

FIG. 52 (d) is a side view of the vehicular lamp 10E (lens body 12A) of the present embodiment (only the main optical surface from which the first emission surface 12A1a is omitted), and FIG. 52 (e) is a top view (first emission surface). 12A1
only the main optical surface from which a is omitted), and in both cases, the lens body 12A from the second exit surface 12A2b.
The optical path (namely, the result of reverse ray tracing) followed by the parallel ray RayBB incident on the inside is shown.

52A to 52D, the slant angle θ2 (=
10 °), and the focal line of the second lens portion 12A2 is slant angle θ2 with respect to the horizontal.
Inclined for minutes. As a result, the focal point F _BB in FIG. _52C is the focal point F _AA in FIG.
Located higher.

Next, considering the optical path followed by the parallel rays RayAA and RayBB when the first emission surface 12A1a is disposed, this optical path is as shown in FIGS. 53 (a) and 53 (b).

FIG. 53A is a top view in which the first emission surface 12A1a is added to FIG. 52B, and the optical path followed by the parallel ray RayAA incident on the lens body 12A from the second emission surface 12A2b (that is, the result of the reverse ray tracing). ). FIG. 53B shows the first output surface 12A1 in FIG.
In the top view to which a is added, the optical path (namely, the result of reverse ray tracing) followed by the parallel ray RayBB incident on the inside of the lens body 12A from the second emission surface 12A2b is shown.

When the slant angle θ2 (= 10 °) is given to the first emission surface 12A1a (that is, the first emission surface 12A1a is configured as a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the vertical. The component having a low focal point F _AA (that is, RayAA) is refracted by the action of the first emission surface 12A1a and travels to the opposite side to form a focal point, as shown in FIG. 53 (a). On the other hand, the component having a high focal point F _BB (that is, RayBB) is refracted by the action of the first emission surface 12A1a and travels to the opposite side, as shown in FIG. As a result, the focal line is inclined in the direction opposite to the slant direction.

Therefore, in order to make the shade 12c coincide (substantially coincide) with the focal line inclined in the direction opposite to the slant direction, the reflection surface 12b and the shade 12c are seen from the second emission surface 12A with respect to the horizontal in front view.
2b and the first emission surface 12A1a are arranged in a posture inclined at a predetermined angle θ2 in the opposite direction. As a result, the shade 12c coincides (substantially coincides) with the focal line inclined opposite to the slant direction, and the rotation (or blurred state) is suppressed.

Based on the above knowledge, the first emission 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 a front view. Specifically, the first emission surface 12A1a of the present embodiment rotates the first emission surface 12A1a of the second embodiment by a predetermined angle θ2 around the first reference axis AX1 in the same direction as the second emission surface 12A2b. It corresponds to that.

Further, the reflection surface 12b and the shade 12c are, when viewed from the front, the second emission surface 12A with respect to the horizontal.
2b and the first exit surface 12A1a are arranged in a posture inclined at a predetermined angle θ2 in the opposite direction.
Specifically, the reflecting surface 12b and the shade 12c of the present embodiment are the reflecting surface 1 of the second embodiment.
2b and the shade 12c correspond to those rotated by a predetermined angle θ2 in the opposite direction to the second emission surface 12A2b and the first emission surface 12A1a with the first reference axis AX1 as the center.

The vehicular lamp 10E of the present embodiment is the vehicular lamp 10 of the second embodiment except for the above points.
The configuration is the same as A.

According to this 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 new-looking lens body (lens combined body) having a slant angle and a vehicle lamp using the lens body. That is, it is possible to provide an attractive lens body (lens combined 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 vehicular lamp using the lens body. Second, the light distribution for low beam condensed in the horizontal direction and the vertical direction even though the second emission surface 12A2b which is the final emission surface is a semi-cylindrical surface (a semi-cylindrical refractive surface). A lens body (lens combined body) capable of forming a pattern and a vehicular lamp using the lens body can be provided. 3rdly, although the slant angle | corner is provided, the lens body (lens coupling body) by which rotation of the light distribution pattern for low beams is suppressed, and a vehicle lamp using the same can be provided.

The appearance with a sense of unity extending in a line shape in a direction tilted by a predetermined angle with respect to the horizontal is that the second emission surface 12A2b, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical shape). This is because the second emission surface 12A2b extends in a direction inclined with respect to the horizontal in a front view.

Even though the second emission surface 12A2b, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refractive surface), a light distribution pattern for low beam condensed in the horizontal direction and the vertical direction is formed. The first light exit surface 12A1 of the first lens portion 12A1 can mainly condense in the horizontal direction.
a (semi-cylindrical refracting surface) takes charge of 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, mainly focusing in the vertical direction. ) Is in charge. That is, it is due to the decomposition of the light collecting function.

Although the slant angle is given, the rotation of the light distribution pattern for the low beam is suppressed because the first emission surface 12A1a extends in a direction inclined by a predetermined angle with respect to the vertical in front view. It is a cylindrical surface and the shade 12c (and the reflection surface 12b) is a front view.
This is because they are arranged in a posture inclined at a predetermined angle in the opposite direction to the second emission surface 12A2b and the first emission surface 12A1a with respect to the horizontal.

Note that the concept of “giving a slant angle” described in the present embodiment and the idea of suppressing the rotation generated with the grant of the slant angle as described above are the second.
The present invention is not limited to the vehicular lamp 10A (lens body 12A) of the embodiment, and can also be applied to the respective modifications, the vehicular lamp (lens body) of the third and fourth embodiments, and the like. Similarly, the present invention can be applied to a vehicular lamp 10J (lens body 12J) of a tenth embodiment described later.

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

FIG. 39 (a) is a side view of a vehicular lamp 10F with a camber angle and a slant angle (
39 (b) is a top view (only the main optical surface), and FIG. 39 (c) is an example of a low beam light distribution pattern formed by the vehicular lamp 10F.

As shown in FIGS. 39 (a) and 39 (b), the vehicular lamp 10F according to the present embodiment is a first view of the second lens portion 12A2 of the vehicular lamp 10A according to the second embodiment as viewed from above. Reference axis AX
1 (that is, the camber angle θ1 is given) and that is inclined with respect to the horizontal (that is, the slant angle θ2 is given) in a front view, that is, the fifth embodiment and the first. This corresponds to a combination of the sixth embodiment.

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

And 1st output surface 12A1a of this embodiment is predetermined angle (theta) 2 with respect to perpendicular | vertical by front view.
The surface is a semi-cylindrical surface extending in an inclined direction (see FIG. 36), and the surface shape is adjusted so that the low beam light distribution pattern is totally condensed.

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

According to the present embodiment, it is possible to provide a new-looking lens body (lens combined body) provided with a camber angle and a slant angle, and a vehicular lamp using the lens body. In addition, the fifth and sixth embodiments described above can be provided. The same effect as the embodiment can be obtained.

It should be noted that the idea of “giving camber angle and slant angle” explained in the present embodiment, and the above-described blurring and rotation generated due to the provision of the camber angle and slant angle are improved and suppressed as described above. The idea is not limited to the vehicular lamp 10A (lens body 12A) of the second embodiment, but each of its modifications, the vehicular lamp (lens body) of the third and fourth embodiments.
It can also be applied. Similarly, the present invention can be applied to a vehicular lamp 10J (lens body 12J) of a tenth embodiment described later.

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

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

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

That is, the first emission surface 12A1a of the present comparative example is configured as a semi-cylindrical surface extending in the vertical direction when viewed from the front as in the fifth embodiment. That is, the first emission 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.

Moreover, the reflective surface 12b and the shade 12c of this comparative example are arrange | positioned with the attitude | position which becomes horizontal by front view similarly to 5th Embodiment. That is, the first emission surface 12A1a of this comparative example is the sixth
Unlike the embodiment, the second emission surface 12A2b and the first emission surface 12 with respect to the horizontal in a front view.
It is not arranged in a posture inclined by a predetermined angle θ2 in the opposite direction to A1a.

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

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

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

As shown in FIGS. 41 (a) and 41 (b), the vehicular lamp 10H of the present comparative example has the first
The first emission surface 12A1a of the vehicular lamp 10G of the comparative example is the same as in the sixth embodiment when viewed from the front.
This 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 emission 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 as seen from the front, similarly to the sixth embodiment.

Moreover, the reflective surface 12b and the shade 12c of this comparative example are arrange | positioned with the attitude | position which becomes horizontal by front view similarly to 5th Embodiment. That is, the first emission surface 12A1a of this comparative example is the sixth
Unlike the embodiment, the second emission surface 12A2b and the first emission surface 12 with respect to the horizontal in a front view.
It is not arranged in a posture inclined by a predetermined angle θ2 in the opposite direction to A1a.

As shown in FIG. 41 (c), the light distribution pattern formed by the vehicular lamp 10H of this comparative example greatly protrudes upward from the horizontal line, and it can be seen that it 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 vehicular lamp 10 of the fifth embodiment when the camber angle θ1 is 30 °.
FIG. 42B shows an example of a low beam light distribution pattern formed by D (the same applies to the vehicular lamp 10F of the seventh embodiment). FIG. 42B shows the vehicular fifth embodiment when the camber angle θ1 is 45 °. It is an example of the light distribution pattern for low beams formed by the lamp 10D (the same applies to the vehicular lamp 10F of the seventh embodiment). The hatched area in FIG. 42 (b) indicates that the area is brighter than the similar area in FIG. 42 (a).

When the present inventors confirmed by simulation, the vehicular lamp 10D of the fifth embodiment (
When the camber angle θ1 is increased (for example, θ1 = 45 °) in the vehicular lamp 10F of the seventh embodiment (for example, θ1 = 45 °), it has been found that the area above the cut-off line becomes brighter as shown in FIG.

  The reason for this will be described below with reference to the drawings.

FIG. 43 is a sectional view of the vehicular lamp 10D of the fifth embodiment (only the main optical surface). FIG.
A line with an arrow at the tip in the middle represents an optical path followed by the light Ray2 from the light source 14 incident at a certain incident angle with respect to the first emission surface 12A1a.

When the camber angle θ1 is increased (for example, θ1 = 45 °) in the vehicle lamp 10D of the fifth embodiment (the same applies to the vehicle lamp 10F of the seventh embodiment), the camber angle θ1 is decreased (for example, θ1 = 30 °). ) As compared with the case, as shown in FIG. 43, the distance between the first exit surface 12A1a and the second entrance surface 12A2a is increased. Therefore, the second incident surface 12A of the light Ray2
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. It will be 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 entrance surface 12A2a are increased, the light Ray2 becomes light traveling obliquely upward with respect to the horizontal for the same reason as described above. It has been found.

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

As a result of intensive studies to improve the above problems, the present inventors have found that the light Ray2 directed upward with respect to the horizontal is emitted from a partial region below the second emission surface 12A2b, This partial region is physically cut or light R emitted from the partial region
The idea that the above-mentioned problem can be improved by adjusting the surface shape (for example, curvature) of the partial region so that ay2 becomes parallel or downward light with respect to the first reference axis AX. Obtained.

FIG. 44A shows a partial region 12 below the second emission surface 12A2b based on the above knowledge.
In this example, A2b2 is physically cut to leave the upper region 12A2b1. in this way,
By cutting a partial region from which light that is originally directed obliquely upward with respect to the horizontal is cut, it is possible to suppress light traveling obliquely upward. As a result, the occurrence of glare can be suppressed and the cut-off line can be made clear.

FIG. 44B shows a partial region 12 below the second emission surface 12A2b based on the above knowledge.
The surface shape (for example, curvature) of the partial region 12A2b2 is adjusted so that the light Ray2 emitted from A2b2 becomes parallel or downward with respect to the first reference axis AX, and the second emission surface 12A2
In this example, b is divided into an upper region 12A2b1 and a lower region 12A2b2. As described above, light that travels obliquely upward can also be suppressed by adjusting the partial region from which light that is originally directed upward with respect to the horizontal is emitted as described above. 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, that the area above the cut-off line can become brighter.

Next, as a ninth embodiment, a vehicle lamp 10I in which a second reference axis AX2 is inclined 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 (only the main optical surface) of the vehicular lamp 10I in which the second reference axis AX2 is inclined with respect to the first reference axis AX1 in a top view.

As shown in FIG. 45, the vehicular lamp 10I of the present embodiment shades the second reference axis AX2 of the vehicular lamp 10D of the fifth embodiment (or the vehicular lamp 10F of the seventh embodiment). This is equivalent to an axis that is rotated by a predetermined angle about the center in the left-right direction of 12c and tilted with respect to the first reference axis AX1 in a top view.

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

The concept of “inclining the second reference axis AX2 with respect to the first reference axis AX1 in a top view” described in the present embodiment is the vehicle lamp 10A (lens body 12A) of the fifth embodiment.
However, the present invention is not limited to this, and can also be applied to the vehicle lamps (lens bodies) of the first to fourth and sixth to eighth embodiments. Similarly, the present invention can be applied to a vehicular lamp 10J (lens body 12J) of a tenth embodiment described later.

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

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

46 is a perspective view of the vehicular 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. 48A shows an example of a low beam light distribution pattern P _LO (synthetic light distribution pattern) formed by the vehicular lamp 10J (lens body 12J), and each part shown in FIGS. 48B to 48D. It is formed by superimposing the distribution 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. _48B ).
Forming a lens body 12A similar to the first optical system of the second embodiment in addition to (FIG. 49 (a) see), further, a light distribution pattern for mid-diffused from the light distribution pattern P _SPOT spot P _MI
The second optical system (see FIG. 49B) forming _D (see FIG. 48C) and the wide light distribution pattern P _WIDE diffused from the mid light distribution pattern P _MID (FIG. 48D (D)) A third optical system (see FIG. 49C).

Hereinafter, differences from the vehicular lamp 10A (lens body 12A) of the second embodiment will be mainly described, and the same configuration as the vehicular lamp 10A (lens body 12A) of the second embodiment will be the same. Reference numerals are assigned and explanations thereof are 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 includes 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 and 44b disposed between 2A1aa and the first front end 12A1bb
And a first lens portion 12A1 including a lower reflective surface 12b disposed between the first rear end portion 12A1aa and the first front end portion 12A1bb, and a second rear end disposed in front of the first lens portion 12A1. Part 12A2aa, a second lens part 12A2 including a second front end part 12A2bb, a connecting part 12A3 connecting the first lens part 12A1 and the second lens part 12A2, and a first rear end of the first lens part 12A1 The lens body includes an upper surface 44c disposed between the portion 12A1aa and the first front end portion 12A1bb.

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

FIG. 50A is a front view of the first rear end portion 12A1aa of the first lens portion 12A1, and FIG.
) Is an AA sectional view (schematic diagram) in FIG. 50A, and FIG. 50C is a BB sectional diagram (schematic diagram) in FIG. 50A.

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

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

As shown in FIG. 46, the first front end portion 12A1bb of the first lens portion 12A1 includes a semicircular columnar first emission surface 12A1a extending in the vertical direction and a pair of left and right arranged on the left and right sides of the first emission surface 12A1a. Output surfaces 46a and 46b.

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

The second exit surface 12A2b includes a semi-cylindrical region 12A2b3 extending in the horizontal direction, an extension region 12A2b4 extending obliquely upward and rearward from the upper edge of the semi-cylindrical region 12A2b3,
Is included.

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

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

As shown in FIG. 49A, the first incident surface 12a, the lower reflecting surface 12b (and the shade 12c).
), The first exit surface 12A1a, the second entrance surface 12A2a, and the second exit surface 12A2b (semi-cylindrical region 12A2b3) are from the light source 14 that has entered the first lens portion 12A1 from the first entrance surface 12a. Of the light Ray _SPOT , light partially blocked by the shade 12c, and
The light internally reflected by the lower reflection surface 12b is emitted from the first emission surface 12A1a, and further the second
The light enters the second lens portion 12A2 from the entrance surface 12A2a, exits from a partial region A1 (see FIG. 47B) of the second exit surface 12A2b (semi-columnar region 12A2b3), and is irradiated forward. Thus, as shown in FIG. 48 (b), the first light distribution pattern P _SPOT (corresponding to the first light distribution pattern of the present invention) including the cut-off line defined by the shade 12c at the upper edge is formed. An optical system is configured.

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

As shown in FIG. 49B, a pair of left and right entrance surfaces 42a and 42b and a pair of left and right side surfaces 44a.
44b, a pair of left and right exit surfaces 46a, 46b, a second entrance surface 12A2a, and a second exit surface 12A2b (semi-cylindrical region 12A2b3) are formed inside the first lens portion 12A1 from the pair of left and right entrance surfaces 42a, 42b. The light Ray _MID from the light source 14 that is incident on the light source and is internally reflected by the pair of left and right side surfaces 44a and 44b is emitted from the pair of left and right emission surfaces 46a and 46b.
The light enters the second lens portion 12A2 from the entrance surface 12A2a and mainly enters the second exit surface 12A2b (
Of the semi-cylindrical region 12A2b3), the regions A2 and A3 on the left and right sides of the partial region A1 (FIG. 47).
(B) by being irradiated forward emitted from the reference), as shown in FIG. 48 (c), is superimposed on the spot light distribution pattern P _SPOT, mid diffused from the light distribution pattern P _SPOT spot A second optical system for forming the light distribution pattern P _MID is configured.

The pair of left and right entrance surfaces 42a and 42b is refracted by light (mainly light Ray _MID spreading in the left and right direction, see FIG. _50B ) that does not enter the first entrance surface 12a among the light from the light source 14. As shown in FIG. 50 (b), the surface incident on the inside of one lens portion 12 </ b> A <b> 1 is configured as a curved surface (for example, a free curved surface) convex toward the light source 14.

As shown in FIG. 47A, the pair of left and right side surfaces 44a and 44b are a pair of left and right side surfaces as viewed from the top, from the first front end portion 12A1bb side of the first lens portion 12A1 toward the first rear end portion 12A1aa side. The space | interval between 44a, 44b is comprised as a curved surface (for example, free-form surface) convex toward the outer side which narrows in a taper shape. Also, 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.
The upper edge and the lower edge of the first rear end portion 12A1aa from the 1bb side toward the first rear end portion 12A1aa side are configured as surfaces having a tapered shape.

Note that the pair of left and right side surfaces 44a and 44b are configured to transmit the light Ray _MID from the light source 14 incident on the inside of the first lens unit 12A1 from the pair of left and right incident surfaces 42a and 42b to the pair of left and right emission surfaces 46a,
No metal vapor deposition is used on the reflection surface that reflects the inner surface (total reflection) toward 46b.

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

With the second optical system having the above-described configuration, the mid light distribution pattern P _MID shown in FIG. _48C is formed on the virtual vertical screen.

The vertical dimension of the mid light distribution pattern P _MID is about 10 degrees in FIG.
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 pair of left and right entrance surfaces 42a and 42b.

In addition, the position of the upper edge of the mid light distribution pattern P _MID is slightly below the horizontal line in FIG. 48C, but is not limited to this, and the surface shape of the pair of left and right entrance 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, in FIG. _48C , 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, but the present invention is not limited to this. For example, a pair of left and right entrance surfaces 42a, 42
b and / or a pair of left and right side surfaces 44a and 44b (for example, respective curvatures in the horizontal direction) can be freely adjusted.

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

As shown in FIG. 49C, the upper incident surface 42c, the upper surface 44c, the coupling portion 12A3, and the second emission surface 12A2b (extended region 12A2b4) are arranged from the upper incident surface 42c to the first lens portion 12.
The light source 14 that has entered the inside of A1 and is internally reflected by the upper surface 44c and travels inside the connecting portion 12A3.
As shown in FIG. 48D, the light Ray _WIDE from the light exits from the second emission surface 12A2b (region A4 above each of the regions A1 to A3, that is, the extension region 12A2b4) and is irradiated forward.
As shown in), it 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 Is configured.

The upper incident surface 42c is light that is not incident on the first incident surface 12a among the light from the light source 14 (mainly,
Light Ray _Wide spreading upward. 50 (c)) 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-form surface) convex toward the light source 14. It is configured as.

As shown in FIGS. 46 and 49 (c), the upper surface 44c has a first lens portion 12A1 in a side view.
The first front end portion 12A1bb side of the first rear end portion 12A1aa side is configured as a curved surface that protrudes obliquely downward. Further, the upper surface 44c is formed as shown in FIG.
As shown in a), when viewed from above, the left and right edges of the first lens portion 12A1 are tapered so as to be tapered from the first front end portion 12A1bb side toward the first rear end portion 12A1aa side. Has been. Specifically, the upper surface 44c is such that the light Ray _WIDE from the light source 14 (more precisely, the reference point F) incident on the first lens portion 12A1 from the upper incident surface 42c becomes parallel light in the vertical direction. The surface shape is configured. Further, the upper surface 44c extends in a direction perpendicular to the paper surface in FIG. 49C with respect to the horizontal direction.

The upper surface 44c is the light source 1 that has entered the first lens unit 12A1 from the upper incident surface 42c.
4 is a reflective surface that internally reflects (totally reflects) the light Ray _WIDE from 4 toward the second emission surface 12A2b (extended region 12A2b4), and does not use metal deposition.

The extension region 12A2b4 is configured as a planar surface extending obliquely upward and rearward from the upper edge of the second emission surface 12A2b (semi-columnar region 12A2b3). Of course, not limited to this, it 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 overhead sign reflecting surface 44c1 is formed by the upper incident surface 42.
The light Ray _OH from the light source 14 incident on the inside of the first lens portion 12A1 from c, reflected by the overhead sign reflecting surface 44c1, and traveling inside the connecting portion 12A3 is reflected on the second emitting surface 12A.
4b (extended region 12A2b4) and irradiated obliquely upward and forward, FIG.
As shown in FIG. 8 (d), the overhead sign light distribution pattern P is located above the cut-off line.
The surface shape is configured to form _OH . The overhead sign reflecting surface 44c1 can be omitted as appropriate.

As the third optical system, instead of the above, the upper incident surface 42c, the connecting portion 12A3, and
The second output surface 12A2b (extended region 12A2b4) includes the light ray _WIDE from the light source 14 that has entered the first lens unit 12A1 from the upper incident surface 42c and travels inside the coupling unit 12A3 without being internally reflected. As shown in FIG. 48 (d), the light is emitted directly from the two exit surfaces 12A2b (extension regions 12A2b4) and irradiated forward, thereby providing a wide light distribution pattern P _WI.
An optical system for forming _DE may be used.

With the third optical system configured as described above, 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.
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 edge of the wide light distribution pattern P _WIDE is along the horizontal line in FIG. 48D, 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 a left upper surface 44c2 and a right upper surface 44c3 that are divided into left and right by a vertical surface including the reference axis AX1, and each of the left upper surface 44c2 and the right upper surface 44c3. The slopes are different from each other. Specifically, the upper left surface 44c2
Is inclined below the right upper surface 44c3. As a result, as shown in FIG. 48D, the wide light distribution pattern P _WIDE includes a cut-off line having a left-right step difference with the upper end edge on the left side lower than the upper end edge on the right side with respect to the vertical line. (If you are driving on the right side) Of course, conversely, the left upper 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 having a left-right step difference in which the upper end edge on the left side is higher than the upper end edge on the right side with respect to the vertical line (in the case of left-hand traffic).

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

According to this 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 that can maintain a line-like light emission appearance even when the viewpoint position changes, and a vehicle lamp 10J including the lens body 12J. Second,
It is possible to provide a lens body 12J capable of realizing the appearance of uniform light emission (or substantially uniform light emission) and a vehicle lamp 10J including the lens body 12J. Third, the efficiency of taking light from the light source 14 into the lens body 12J is dramatically improved. Fourthly, 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 vehicular lamp 10J including the lens body 12J. Fifth, the second emission surface 12A2b, which is the final emission surface, is a semi-cylindrical surface 12A2b.
3 (a semi-cylindrical refracting surface), a lens body 12J capable of forming a spot light distribution pattern P _SPOT condensed in the horizontal direction and the vertical direction, and a vehicle lamp 10J provided with the lens body 12J Can be provided.

One lens body 12J can maintain a line-like light emission appearance even if the viewpoint position changes, that is, 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 (corresponding to the second light distribution pattern of the present invention) and wide light distribution pattern P _WIDE (corresponding to the third light distribution pattern of the present invention). A plurality of optical systems to be formed, that is, the first optical system (see FIG. 49A), the second
This is because the optical system (see FIG. 49B) and the third optical system (see FIG. 49C) are provided. In order to achieve this effect, at least the first optical system (see FIG. 49A).
And the second optical system (see FIG. 49B) may be provided, and the third optical system (see FIG. 49C) can be omitted as appropriate.

Appearance of uniform light emission (or substantially uniform light emission) can be realized by the first lens portion 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. The light from the light source 14 incident on the inside of 12A1 is reflected by the respective reflecting surfaces, that is, the lower reflecting surface 12b, the pair of left and right side surfaces 44a and 44b, and the upper surface 44c.
In addition to the multi-point light emission inside 2J (see FIG. 51), the reflected light from the respective reflecting surfaces, that is, the lower reflecting surface 12b, the pair of left and right side surfaces 44a and 44b, and the upper surface 44c is the final emitting surface. Uniform emission from almost the entire area of the second emission surface 12A2b, that is, the lower reflection surface 1
The second light exit surface 12A2b (semi-cylindrical region 12A) from which the reflected light from 2b is the final light exit surface
2b3) is emitted from a partial area A1 (see FIG. 47B), and a pair of left and right side surfaces 44a,
Reflected light from 44b is mainly the final emission surface of the second emission surface 12A2b (semi-cylindrical region 12A2b3), and the left and right regions A2, A3 of the partial region A1 (see FIG. 47B). )
And the reflected light from the upper surface 44c is mainly the second emission surface 12A2 that is the final emission surface.
This is due to emission from b (region A4 above each region A1 to A3, ie, extension region 12A2b4). In order to achieve this effect, at least the first optical system (FIG. 49 (
a) and a second optical system (see FIG. 49B), 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 greatly improved because the respective incident surfaces, 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 light sources. 14 (see FIGS. 50A to 50C).
It is because. In order to achieve this effect, at least the first incident surface 12a and the pair of left and right incident surfaces 42a and 42b may be provided, and the upper incident surface 42c can be omitted as appropriate.

The vehicular lamp 10J (lens body 12J) of the present embodiment is based on the above-described concept of the first emission surface 1.
Although it corresponds to what is applied to the vehicular lamp 10A of the second embodiment including 2A1a and the second emission surface 12A2b, it is not limited thereto. That is, the above concept is applied to the vehicular lamp 10 according to the first embodiment including one emission surface, for example, other than the vehicular lamp 10A according to the second embodiment including the first emission surface 12A1a and the second emission surface 12A2b. It can also be applied.

The second output surface 12A2b, which is the final output surface, can be configured as a semi-cylindrical surface 12A2b3 (a semi-cylindrical refracting surface). It is because it is.

The spot light distribution pattern P _SPOT condensed in the horizontal direction and the vertical direction even though the second emission surface 12A2b, which is the final emission surface, is a semi-cylindrical surface 12A2b3 (a semi-cylindrical refractive surface). Can be formed mainly by focusing the light in the horizontal direction on the first lens portion 12A1.
The first exit surface 12A1a (semi-cylindrical refracting surface) of the second lens portion 12A2, which is the final exit surface of the lens body 12J, mainly collects light in the vertical direction. This is because the cylindrical refractive surface is in charge. That is, it is due to the decomposition of the light collecting function.

In addition, each idea explained in the first to ninth embodiments and the modifications thereof, for example, the idea of “giving camber angle” explained in the fifth embodiment, and the occurrence of this camber angle. The concept of improving the blur as described above, the concept of “giving a slant angle” explained in the sixth embodiment, and the rotation generated with the grant of the slant angle as described above The idea of suppressing, the idea of “giving camber angle and slant angle” explained in the seventh embodiment, and the blur and rotation generated by the provision of the camber angle and slant angle are as described above. Of course, the idea of improvement and suppression can be applied to the vehicular lamp 10J (lens body 12J) of the present embodiment.

In the tenth embodiment, the second optical system (see FIG. 49B) is configured to form the mid light distribution pattern P _MID , and the third optical system (see FIG. 49C) is configured. Although the example configured to form the wide light distribution pattern P _WIDE has been described, the present invention is not limited to this.

For example, on the contrary, the second optical system (see FIG. 49 (b)) has a wide light distribution pattern P _{WI.
The DE} may be formed, and the third optical system (see FIG. 49C) may be configured to form the mid light distribution pattern P _MID .

For example, the surface shape (for example, the curvature in the horizontal direction) of the pair of left and right entrance surfaces 42a and 42b and / or the pair of left and right side surfaces 44a and 44b constituting the second optical system is adjusted as shown in FIG. Thus, the light distribution pattern can be expanded (for example, in the horizontal direction), as shown in FIG.
The light distribution pattern can be narrowed (for example, in the horizontal direction) by adjusting as shown in FIG. Accordingly, by adjusting the surface shape (for example, the curvature in the horizontal direction) of the pair of left and right entrance surfaces 42a and 42b and / or the pair of left and right side surfaces 44a and 44b constituting the second optical system, the mid light distribution pattern 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. 55A, the light distribution pattern (for example, in the horizontal direction) is adjusted. ) And the light distribution pattern can be narrowed (for example, in the horizontal direction) by adjusting as shown in FIG. 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, not only the wide light distribution pattern,
A mid light distribution pattern can also be formed.

Of course, the second optical system (see FIG. 49B) and the third optical system (see FIG. 49C)
In either case, the wide light distribution pattern P _WIDE may be formed. Conversely, the second optical system (see FIG. 49B) and the third optical system (see FIG. 49C) may both be configured to form the mid light distribution pattern P _MID. .

Each numerical value shown in the above embodiment and each modified example is an exemplification, and any appropriate numerical value different from this can be used.

The above embodiment is merely an example in all respects. The present invention is not construed as being limited to these descriptions. The present invention can be implemented in various other forms without departing from the spirit or main features thereof.

DESCRIPTION OF SYMBOLS 10, 10A-10J ... Vehicle lamp, 12, 12A, 12J ... Lens body, 12A1 ... 1st lens part, 12A1a ... 1st output surface, 12A1aa ... 1st rear end part, 12A1bb ... 1st
Front end portion, 12A2 ... second lens portion, 12A2a ... second entrance surface, 12A2aa ... second rear end portion, 12A2b ... second exit surface, 12A3 ... connecting portion, 12a ... first entrance surface, 12b ... reflection surface (
Lower reflection surface), 12c ... shade, 12d ... emission surface, 14 ... light source, 16, 16C ... lens assembly, 18 ... holding member, 42a, 42b ... pair of left and right entrance surfaces, 42c ... upper entrance surface, 44a
44b ... a pair of left and right side surfaces, 44c ... an upper surface, 44c1 ... an overhead sign reflecting surface,
44c2 ... Left upper surface, 44c3 ... Right upper surface, 46a, 46b ... A pair of left and right emission surfaces

In order to achieve the above object, one aspect of the present invention includes a first lens unit and a second lens unit, and light from a light source is transmitted from a first incident surface of the first lens unit to the inside of the first lens unit. And is partially shielded by the shade of the first lens unit, then exits from the first exit surface of the first lens unit, and further from the second entrance surface of the second lens unit. A predetermined light distribution pattern including a cut-off line defined by the shade is formed at the upper end edge by being incident on the inside of the unit and emitted from the second exit surface of the second lens unit and irradiated forward. In the configured lens body, the first emission surface is a surface that collects light from the light source emitted from the first emission surface in the first direction, and is configured as a semi-cylindrical surface, The second exit surface is the second exit surface A plane condensing relates a second direction perpendicular to the light from the light source that emits in the first direction from, characterized in that it is configured as a lens body that is configured as a surface of a semi-cylindrical.

According to this aspect , first, it is possible to provide a lens body that looks good and has a sense of unity extending in a line shape in a predetermined direction. Secondly, a predetermined light distribution pattern (in a horizontal direction and a vertical direction) is collected even though the second emission surface, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refractive surface). For example, it is possible to provide a lens body capable of forming a low beam light distribution pattern including a cut-off line defined by a shade at the upper edge.

In the above invention, a preferable aspect is that the lens body is a lens body having a shape extending along a first reference axis extending in a horizontal direction, and the first lens portion includes the first incident surface and the reflecting surface. , The shade and the first exit surface, and the second lens unit includes the second entrance surface and the second exit surface, the first entrance surface, the reflection surface, the shade, and the first exit surface. A surface, the second entrance surface, and the second exit surface are arranged in this order along the first reference axis, the first entrance surface from the light source disposed in the vicinity of the first entrance surface The light from the light source that is refracted and incident on the inside of the first lens unit is incident on the center of the light source and a point near the shade at least in the vertical direction. And forward with respect to the first reference axis Therefore, the reflection surface extends toward the front from the lower end edge of the incident surface, and the shade includes the reflection surface. It is formed in the front-end | tip part.

According to this aspect , firstly, it is possible to provide a lens body in which a reflection surface by metal vapor deposition that causes a cost increase is omitted. Second, it is possible to provide a lens body capable of suppressing the melting of the lens body and the decrease in the light source output due to the heat generated by the light source.

In the above invention, the lens body preferably includes the first lens unit, the second lens unit, and a connecting unit that connects the first lens unit and the second lens unit, The connecting portion connects the first lens portion and the second lens portion in a state where a space surrounded by the first exit surface, the second entrance surface, and the connecting portion is formed. To do.

According to this aspect , it is possible to configure a lens body in which the first lens unit and the second lens unit are coupled.

In the above invention, a preferable aspect is that the lens body is a lens body that is integrally formed by injection molding using a mold, and the space has a pulling direction opposite to the connecting portion. In order to smoothly remove the mold, the first exit surface and the second entrance surface are each provided with a draft angle, and the second exit surface is configured with the second exit surface. The surface shape is adjusted so that light from the light source emitted from a surface becomes light parallel to the first reference axis.

According to this aspect , the light from the light source that is emitted from the second emission surface, which is the final emission surface, is emitted from the first emission surface and the second incident surface, even though the draft angle is set. It is possible to provide a lens body suitable for a vehicle lamp that emits light parallel to a reference axis.

In the above invention, a preferable aspect is that the first direction is a horizontal direction, the first emission surface is configured as a semi-cylindrical surface extending in a vertical direction, and the second direction is: The second emission surface is a vertical direction, and is configured as a semi-cylindrical surface extending in the horizontal direction.

According to this aspect , as a result of the final emission surface being the second emission surface (a semi-cylindrical surface extending in the horizontal direction), a lens body having a sense of unity extending in a line shape in the horizontal direction is provided. be able to.

In the above invention, a preferable aspect is that the first direction is a vertical direction, the first emission surface is configured as a semi-cylindrical surface extending in a horizontal direction, and the second direction is The second emission surface is a horizontal direction and is configured as a semi-cylindrical surface extending in the vertical direction.

According to this aspect , as a result of the final exit surface being the second exit surface (a semi-cylindrical surface extending in the vertical direction), a lens body having a sense of unity extending in a line shape in the vertical direction is provided. be able to.

In the invention described above, a preferable aspect is that the lens assembly includes a plurality of lens bodies and is integrally molded, and the second emission surfaces of the plurality of lens bodies are arranged in a row in a state of being adjacent to each other. It is arranged as a lens combined body that constitutes a semi-cylindrical emission surface group that is arranged and extends in a line shape in a predetermined direction.

According to this aspect , it is possible to provide a lens assembly that looks great and has a sense of unity extending in a line shape in a predetermined direction (for example, a horizontal direction or a vertical direction).

Another aspect of the present invention includes a light source, a first lens unit, and a second lens unit, and light from the light source enters the first lens unit from a first incident surface of the first lens unit. After being partially shielded by the shade of the first lens unit, the light exits from the first exit surface of the first lens unit and further enters the second lens unit from the second entrance surface of the second lens unit. Then, a lens configured to form a predetermined light distribution pattern including a cut-off line defined by the shade at the upper end edge by being emitted from the second emission surface of the second lens unit and irradiated forward. In the vehicular lamp provided with the body, the first emission surface is a surface that condenses light from the light source emitted from the first emission surface in the first direction, and is configured as a semi-cylindrical surface. The second exit surface is the second exit surface. A plane condensing relates a second direction perpendicular to the light in the first direction from the light source for emitting from the surface, characterized in that it is configured as a surface of a semi-cylindrical.

According to this aspect , firstly, it is possible to provide a vehicular lamp that includes a lens body having a sense of unity extending in a line shape in a predetermined direction. Secondly, a predetermined light distribution pattern (in a horizontal direction and a vertical direction) is collected even though the second emission surface, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refractive surface). For example, it is possible to provide a vehicular lamp including a lens body capable of forming a low beam light distribution pattern including a cut-off line defined by a shade at the upper edge.

In the above invention, a preferable aspect is that the lens body is a lens body having a shape extending along a first reference axis extending in a horizontal direction, and the first lens portion includes the first incident surface and the reflecting surface. , The shade and the first exit surface, and the second lens unit includes the second entrance surface and the second exit surface, the first entrance surface, the reflection surface, the shade, and the first exit surface. A surface, the second entrance surface, and the second exit surface are arranged in this order along the first reference axis, the first entrance surface from the light source disposed in the vicinity of the first entrance surface The light from the light source that is refracted and incident on the inside of the first lens unit is incident on the center of the light source and a point near the shade at least in the vertical direction. And forward with respect to the first reference axis Therefore, the reflection surface extends toward the front from the lower end edge of the incident surface, and the shade includes the reflection surface. It is formed in the front-end | tip part.

According to this aspect , firstly, it is possible to provide a vehicular lamp including a lens body in which a reflection surface by metal vapor deposition that causes a cost increase is omitted. Secondly, it is possible to provide a vehicular lamp including a lens body that can prevent the lens body from being melted or the light source output from being lowered due to heat generated by the light source.

Another aspect of the present invention includes a light source, a shade, a first lens unit, and a second lens unit, and after the light from the light source is partially blocked by the shade, the first incident of the first lens unit The light enters the inside of the first lens part from the surface and exits from the first exit surface of the first lens part, and further enters the inside of the second lens part from the second entrance surface of the second lens part. A lens body configured to form a predetermined light distribution pattern including a cut-off line defined by the shade at the upper edge by being emitted from the second emission surface of the second lens unit and irradiated forward. In the vehicle lamp, the first emission surface is a surface that collects light from the light source emitted from the first emission surface in the first direction, and is configured as a semi-cylindrical surface. 2 exit surface is the second exit surface A plane condensing relates a second direction perpendicular to the light from the light source to al emitted in the first direction, characterized in that it is configured as a surface of a semi-cylindrical.

According to this aspect , firstly, a vehicular lamp (for example, a so-called direct projection type (also referred to as a direct projection type) or a projector type having a lens body having a unity appearance that extends in a line shape in a predetermined direction. Vehicle lamps) can be provided. Secondly, a predetermined light distribution pattern (in a horizontal direction and a vertical direction) is collected even though the second emission surface, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refractive surface). For example, a vehicular lamp (for example, a so-called direct projection type (also referred to as a direct-light type)) having a lens body capable of forming a low beam light distribution pattern including a cut-off line defined by a shade at the upper end edge, or A projector-type vehicular lamp) can be provided.

Another aspect of the present invention includes a light source, a first lens unit, and a second lens unit, and light from the light source enters the first lens unit from a first incident surface of the first lens unit. The light exits from the first exit surface of the first lens unit, and further enters the second lens unit from the second entrance surface of the second lens unit and exits from the second exit surface of the second lens unit. In the vehicular lamp provided with the lens body configured to form a predetermined light distribution pattern by being irradiated forward, the first emission surface is emitted from the light source emitted from the first emission surface. The surface that collects light in the first direction is configured as a semi-cylindrical surface, and the second emission surface is orthogonal to the first direction from the light source that is emitted from the second emission surface. It is a surface that collects light in the second direction, and is configured as a semi-cylindrical surface. And said that you are.

According to this aspect , firstly, a vehicular lamp (for example, a so-called direct projection type (also referred to as a direct projection type) or a projector type having a lens body having a unity appearance that extends in a line shape in a predetermined direction. Vehicle lamps) can be provided. Secondly, a predetermined light distribution pattern (in a horizontal direction and a vertical direction) is collected even though the second emission surface, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refractive surface). For example, it is possible to provide a vehicular lamp (for example, a so-called direct projection type (also referred to as a direct-light type) or a projector type vehicular lamp) provided with a lens body capable of forming a high beam light distribution pattern. it can.

Claims (11)

Including a first lens unit and a second lens unit, light from a light source enters the first lens unit from a first incident surface of the first lens unit and is partially shielded by the shade of the first lens unit. Then, the light exits from the first exit surface of the first lens unit, and further enters the second lens unit from the second entrance surface of the second lens unit, and the second exit of the second lens unit. In the lens body configured to form a predetermined light distribution pattern including a cut-off line defined by the shade at the upper edge by being emitted from the surface and irradiated forward,
The first emission surface is a surface that condenses light from the light source emitted from the first emission surface in the first direction, and is configured as a semi-cylindrical surface,
The second emission surface is a surface that collects light from the light source emitted from the second emission surface in a second direction orthogonal to the first direction, and is configured as a semi-cylindrical surface. . The lens body is a lens body having a shape extending along a first reference axis extending in a horizontal direction,
The first lens unit includes the first incident surface, the reflective surface, the shade, and the first emission surface,
The second lens unit includes the second entrance surface and the second exit surface,
The first incident surface, the reflecting surface, the shade, the first exit surface, the second entrance surface, and the second exit surface are arranged in this order along the first reference axis,
The first incident surface is a surface on which light from the light source disposed in the vicinity of the first incident surface is refracted and is incident on the inside of the first lens unit, and is from the light source incident on the inside of the first lens unit. At least in the vertical direction passes through the center of the light source and a point in the vicinity of the shade, and converges toward a second reference axis inclined forward and downward with respect to the first reference axis. Is configured to
The reflective surface extends forward from the lower end edge of the incident surface,
The lens body according to claim 1, wherein the shade is formed at a tip portion of the reflecting surface. The lens body includes the first lens unit, the second lens unit, and a connecting unit that connects the first lens unit and the second lens unit,
The connecting portion connects the first lens portion and the second lens portion to the first exit surface and the second lens.
The lens body according to claim 1, wherein the lens body is connected in a state where a space surrounded by an incident surface and the connecting portion is formed. The lens body is a lens body molded integrally by injection molding using a mold,
The space is formed by a mold having a pulling direction opposite to the connecting portion,
In order to smoothly remove the mold, the first exit surface and the second entrance surface are respectively
A draft angle is set,
The surface shape of the second emission surface is adjusted so that light from the light source emitted from the second emission surface becomes light parallel to the first reference axis. Any one of
The lens body according to the item. The first direction is a horizontal direction;
The first emission surface is configured as a semi-cylindrical surface extending in the vertical direction,
The second direction is a vertical direction,
The lens body according to any one of claims 1 to 4, wherein the second emission surface is configured as a semi-cylindrical surface extending in a horizontal direction. The first direction is a vertical direction;
The first emission surface is configured as a semi-cylindrical surface extending in the horizontal direction,
The second direction is a horizontal direction;
The lens body according to any one of claims 1 to 4, wherein the second emission surface is configured as a semi-cylindrical surface extending in a vertical direction. A lens assembly including a plurality of the lens bodies according to any one of claims 1 to 6 and integrally molded,
The second combined surfaces of the plurality of lens bodies are arranged in a row in a state of being adjacent to each other, and constitute a semi-columnar output surface group extending in a line shape in a predetermined direction. A light source, a first lens unit, and a second lens unit, wherein light from the light source enters the first lens unit from a first incident surface of the first lens unit and is shaded by the shade of the first lens unit; After being partially shielded from light, the light exits from the first exit surface of the first lens unit, and further enters the second lens unit from the second entrance surface of the second lens unit. In a vehicular lamp provided with a lens body configured to form a predetermined light distribution pattern including a cut-off line defined by the shade at the upper edge by being emitted from the second emission surface and irradiated forward ,
The first emission surface is a surface that condenses light from the light source emitted from the first emission surface in the first direction, and is configured as a semi-cylindrical surface,
The second emission surface is a surface that condenses light from the light source emitted from the second emission surface in a second direction orthogonal to the first direction, and is configured as a semi-cylindrical surface. Light fixture. The lens body is a lens body having a shape extending along a first reference axis extending in a horizontal direction,
The first lens unit includes the first incident surface, the reflective surface, the shade, and the first emission surface,
The second lens unit includes the second entrance surface and the second exit surface,
The first incident surface, the reflecting surface, the shade, the first exit surface, the second entrance surface, and the second exit surface are arranged in this order along the first reference axis,
The first incident surface is a surface on which light from the light source disposed in the vicinity of the first incident surface is refracted and is incident on the inside of the first lens unit, and is from the light source incident on the inside of the first lens unit. At least in the vertical direction passes through the center of the light source and a point in the vicinity of the shade, and converges toward a second reference axis inclined forward and downward with respect to the first reference axis. Is configured to
The reflective surface extends forward from the lower end edge of the incident surface,
The vehicular lamp according to claim 8, wherein the shade is formed at a tip portion of the reflecting surface. A light source, a shade, a first lens portion, and a second lens portion, and after the light from the light source is partially shielded by the shade, the first lens portion from the first incident surface to the inside of the first lens portion Is incident on the first lens unit and exits from the first exit surface of the first lens unit, and further enters the second lens unit from the second entrance surface of the second lens unit and exits from the second lens unit. In a vehicular lamp provided with a lens body configured to form a predetermined light distribution pattern including a cut-off line defined by the shade at the upper edge by being emitted from the surface and irradiated forward,
The first emission surface is a surface that condenses light from the light source emitted from the first emission surface in the first direction, and is configured as a semi-cylindrical surface,
The second emission surface is a surface that condenses light from the light source emitted from the second emission surface in a second direction orthogonal to the first direction, and is configured as a semi-cylindrical surface. Light fixture. A light source, a first lens part, and a second lens part, and light from the light source enters the first lens part from a first incident surface of the first lens part and enters the first of the first lens part. By exiting from the exit surface, and further entering the inside of the second lens unit from the second entrance surface of the second lens unit and exiting from the second exit surface of the second lens unit and being irradiated forward In a vehicular lamp provided with a lens body configured to form a predetermined light distribution pattern,
The first emission surface is a surface that condenses light from the light source emitted from the first emission surface in the first direction, and is configured as a semi-cylindrical surface,
The second emission surface is a surface that condenses light from the light source emitted from the second emission surface in a second direction orthogonal to the first direction, and is configured as a semi-cylindrical surface. Light fixture.