JP5196314B2 - Vehicle lamp and lens body - Google Patents

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp that is capable of forming a light distribution pattern suitable for a headlamp with almost no illusion light appearing above a horizontal line.

  2. Description of the Related Art Conventionally, a vehicular lamp using a lens body having an incident surface, a first reflecting surface, a second reflecting surface, a lens surface, and the like formed on a surface is known (see, for example, Patent Document 1).

  FIG. 21 is a diagram for explaining the configuration of the vehicular lamp described in Patent Document 1. FIG. 22 is a diagram for explaining a light distribution pattern formed by the vehicular lamp described in Patent Document 1.

As shown in FIG. 21, the vehicular lamp 200 described in Patent Document 1 includes a light source 210 and a lens body 220. The surface of the lens body 220 has an incident surface 221 as a hemispherical recess, and a light source 20. A first reflecting surface 222, a second reflecting surface 223, a convex lens surface 224, and the like that cover the irradiation direction of the light source 20 from the side are formed.
JP 2002-216507 A

  The inventor of the present application observed a light distribution pattern actually formed by the vehicle lamp 200 described in Patent Document 1. As a result, as shown in FIG. 22, dazzling light appears above the horizontal line H in the light distribution pattern, and thus it was found that the vehicular lamp 200 described in Patent Document 1 is not suitable for a headlamp.

  As a result of intensive studies on the cause of the appearance of illusion light above the horizontal line H, the inventor of the present application has found that a convex lens surface is formed in the lens body 220 formed with the convex lens surface 224 having no back surface described in Patent Document 1. When a plurality of parallel light beams having different inclination angles with respect to the optical axis AX of the convex lens surface 224 are incident on the inside of the lens from 224, the parallel light beams are not condensed and the optical axis of the convex lens surface 224 is collected as shown in FIG. 4. It is found that the light spreads in the ranges A1 and A2 surrounded by the four straight lines L1 to L4 in FIG. 4 on the horizontal plane including AX, and that illusion light appears above the horizontal line H due to this. It was.

  Then, as a result of further investigation based on the above knowledge, the inventor of the present application has a range in which the plurality of parallel rays incident from the convex lens surface 224 spread (for example, surrounded by four straight lines L1 to L4 in FIG. 4). If the antireflection ranges are formed in the ranges A1 and A2), it is possible to prevent or reduce the incidence of the reflected light that causes the illusion light on the convex lens surface 214, so that the illusion light hardly appears above the horizontal line H. The idea was that a light distribution pattern suitable for a headlamp could be formed.

  The present invention has been made on the basis of such knowledge and idea, and a vehicular lamp capable of forming a light distribution pattern suitable for a headlamp with almost no illusion light appearing above the horizon. The purpose is to provide.

  In order to solve the above problems, the invention according to claim 1 is directed to a vehicular lamp including a light source and a solid lens body integrally formed with a rear lens portion, a central lens portion, and a front lens portion. An incident surface and a first reflecting surface are formed on the surface of the lens portion, an antireflection range and a second reflecting surface are formed on the surface of the central lens portion, and the surface of the front lens portion is formed. Is formed with a lens surface, the incident surface is an incident surface that makes irradiation light from the light source enter the inside of the lens, and the first reflecting surface is incident on the lens from the incident surface, A light-reflecting surface that condenses irradiation light from the light source that has reached the first reflection surface in the vicinity of the rear edge of the anti-reflection surface and reflects the light toward the lens surface, and the light source from the side of the light source. Formed in a range covering the irradiation direction of the The stop range and the second reflecting surface are formed between the light source and the lens surface, and the antireflection range is configured to receive a plurality of parallel rays having different inclination angles with respect to the optical axis of the lens surface from the lens surface. The second reflection surface is formed in a range where the plurality of parallel rays spread when entering the lens, and the second reflection surface reflects the reflected light from the first reflection surface that has reached the second reflection surface. A reflection surface that reflects toward the light source, and is formed in a predetermined range from the rear end edge of the antireflection range to the rear, and the lens surface includes reflected light from the first reflection surface and the second reflection surface. An exit surface from which reflected light from the surface exits, and is formed as an aspheric lens surface.

  According to the first aspect of the present invention, when a plurality of parallel rays having different inclination angles with respect to the optical axis of the lens surface are incident on the inside of the lens from the lens surface, the plurality of parallel rays are formed in a range that spreads. Due to the action of the antireflection range, it becomes possible to prevent or reduce the incidence of reflected light that causes dazzling light on the lens surface. Therefore, according to the first aspect of the present invention, it is possible to provide a vehicular lamp capable of forming a light distribution pattern suitable for a headlamp with almost no illusion light appearing above the horizontal line. It becomes.

  According to a second aspect of the present invention, in the first aspect of the present invention, the antireflection range and the second reflection surface are formed on a horizontal plane including the optical axis of the lens surface.

  This is an exemplification of the formation of the antireflection range and the second reflection surface, and the present invention is not limited to this. For example, the antireflection range and the second reflecting surface are formed at a position slightly inclined with respect to a horizontal plane including the optical axis of the lens surface or slightly shifted above and below the horizontal plane including the optical axis of the lens surface. It may be formed on a flat surface.

  According to a third aspect of the present invention, in the first or second aspect of the invention, when a plurality of parallel light beams having different inclination angles with respect to the optical axis of the lens surface are incident on the lens body from the lens surface. An antireflection surface subjected to an antireflection treatment is formed in a range where the plurality of parallel rays spread.

  According to the third aspect of the present invention, when a plurality of parallel rays having different inclination angles with respect to the optical axis of the lens surface are incident on the inside of the lens from the lens surface, the plurality of parallel rays are formed in a wide range. The antireflection range is formed as an antireflection surface that has been subjected to an antireflection treatment, and the action of the antireflection surface prevents or reduces the incidence of reflected light that causes dazzling light on the lens surface. Is possible. For this reason, according to the invention described in claim 3, it is possible to provide a vehicular lamp that can form a light distribution pattern suitable for a headlamp with almost no illusion light appearing above the horizontal line. It becomes.

  According to a fourth aspect of the present invention, in the first or second aspect of the present invention, when a plurality of parallel rays having different inclination angles with respect to the optical axis of the lens surface are incident on the inside of the lens body from the lens surface. A protruding shape extending outside the lens body is formed in a range where the plurality of parallel rays spread.

  According to the fourth aspect of the present invention, when a plurality of parallel rays having different inclination angles with respect to the optical axis of the lens surface are incident on the inside of the lens from the lens surface, the plurality of parallel rays are formed in a range that spreads. The antireflection range is formed as a protrusion shape extending outside the lens body, and the action of the protrusion shape can prevent or reduce the incidence of reflected light that causes dazzling light on the lens surface. Become. For this reason, according to the invention described in claim 4, it is possible to provide a vehicular lamp that can form a light distribution pattern suitable for a headlamp with almost no illusion light appearing above the horizontal line. It becomes.

  According to a fifth aspect of the present invention, the rear lens unit, the central lens unit, and the front lens unit are integrally formed, and in a solid lens body used for a vehicular lamp, the surface of the rear lens unit includes an incident surface and A first reflection surface is formed, an antireflection range and a second reflection surface are formed on the surface of the central lens portion, and a lens surface is formed on the surface of the front lens portion, The incident surface is an incident surface that allows irradiation light from the light source to be incident on the inside of the lens, and the first reflecting surface is incident on the lens from the incident surface and reaches the first reflecting surface from the light source. Is a reflection surface that collects the irradiation light in the vicinity of the rear edge of the antireflection surface and reflects it toward the lens surface, and is formed in a range that covers the irradiation direction of the light source from the side of the light source. And the antireflection range and the second reflecting surface are: The reflection preventing range is formed between the light source and the lens surface, and the plurality of antireflection ranges are obtained when a plurality of parallel rays having different inclination angles with respect to the optical axis of the lens surface are incident on the lens surface from the lens surface. Are formed in a range in which the parallel light rays spread, and the second reflecting surface is a reflecting surface that reflects the reflected light from the first reflecting surface that has reached the second reflecting surface toward the lens surface, The lens surface is an exit surface from which the reflected light from the first reflecting surface and the reflected light from the second reflecting surface are emitted. And is formed as an aspheric lens surface.

  According to the fifth aspect of the present invention, when a plurality of parallel light beams having different inclination angles with respect to the optical axis of the lens surface are incident on the inside of the lens from the lens surface, the plurality of parallel light beams are formed in a range that spreads. Due to the action of the antireflection range, it becomes possible to prevent or reduce the incidence of reflected light that causes dazzling light on the lens surface. Therefore, according to the fifth aspect of the present invention, it is possible to provide a lens body that can form a light distribution pattern suitable for a headlamp with almost no illusion light appearing above the horizontal line. Become.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the vehicle lamp which can form the light distribution pattern suitable for a headlamp, with almost no illusion light appearing above a horizon.

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

  FIG. 1 is a perspective view of a vehicular lamp (optical unit) according to an embodiment of the present invention. FIG. 2 is a side view of the vehicular lamp shown in FIG. FIG. 3 is a bottom view of the vehicular lamp shown in FIG.

  A vehicular lamp 100 according to the present embodiment is applied to a vehicle headlamp (head lamp or the like) such as an automobile or a motorcycle, and as shown in FIGS. 1 to 3, a lens body 10 and a light source 20. Etc.

  The lens body 10 is a solid lens body in which a rear lens portion 11, a central lens portion 12, and a front lens portion 13 are integrally formed. For example, a transparent or translucent material such as acrylic or polycarbonate is injection-molded. Are formed integrally. The light source 20 is an LED light source such as an LED package in which one or a plurality of LED chips of a single color or a plurality of colors (for example, RGB three colors) is packaged, or a bulb light source such as an incandescent bulb. Hereinafter, an example in which the light source 20 is an LED light source will be described.

  First, the rear lens unit 11 will be described.

  On the surface of the rear lens portion 11, an incident surface 11a, a first reflecting surface 11b, and a lower surface 11c are formed. The incident surface 11a is an incident surface on which the light emitted from the light source 20 is incident on the inside of the lens. For example, the incident surface 11a is formed as a hemispherical concave portion on the lower surface 11c slightly below the optical axis AX of the front lens unit 13. . The light source 20 is disposed in the concave portion with the optical axis facing upward, and is fixed to the lens body 10 with a sealing agent such as a transparent resin, for example.

  As shown in FIGS. 1 to 3, the first reflecting surface 11 b is incident on the inside of the lens from the incident surface 11 a, and the irradiation light from the light source 20 that has reached the first reflecting surface 11 b is reflected by the central lens unit 12. This is a reflecting surface that condenses near the rear edge 12a1, 12a2 of the prevention surface 12a (the vicinity of the intersection of the rear edge 12a1, 12a2 in each figure is illustrated) and reflects toward the lens surface 13a. To the range covering the irradiation direction of the light source 20. Specifically, in the first reflecting surface 11b, the first focal point F1 is set in the vicinity of the light source 20, and the second focal point F2 is in the vicinity of the rear end edges 12a1 and 12a2 of the antireflection surface 12a of the central lens unit 12 (in the respective drawings). For example, an evaporation process using a metal (aluminum or the like) is performed in a range that covers the irradiation direction of the light source 20 from the side of the light source 20, for example, an elliptical reflecting surface set to the intersection of the rear end edges 12 a 1 and 12 a 2. It is formed by.

  Next, the central lens unit 12 will be described.

  An antireflection range 12 a and a second reflection surface 12 b are formed on the surface of the central lens portion 12.

  The antireflection range 12a and the second reflection surface 12b are formed on, for example, a horizontal plane between the light source 20 and the lens surface 13a and including the optical axis AX of the lens surface 13a.

  First, the technical significance of the antireflection range 12a will be described. FIG. 4 is a diagram for explaining the technical significance of the antireflection range 12a.

  The inventor of the present application conducted a ray tracing by entering a plurality of parallel rays having different inclination angles with respect to the optical axis AX of the lens surface 13a from the lens surface 13a into the lens. As a result, as shown in FIG. In the lens body 10 on which the non-existing lens surface 13a is formed, the parallel light rays are not collected and are surrounded by four straight lines L1 to L4 in FIG. 4 on the horizontal plane including the optical axis AX of the lens surface 13a. It has been found that it spreads over the ranges A1 and A2 and that due to this, illusion light appears above the horizontal line H (see FIG. 5, FIG. 6, etc.).

  As a result of further investigation based on the above knowledge, the inventor of the present application has a range in which the plurality of parallel rays incident from the lens surface 13a spread (for example, surrounded by four straight lines L1 to L4 in FIG. 4). If the antireflection area 12a is formed in the areas A1 and A2), it is possible to prevent or reduce the reflected light that causes the dazzling light from entering the lens surface 13a, so that most of the dazzling light appears above the horizontal line H. First, the idea that a light distribution pattern suitable for a headlamp can be formed was obtained, and this was verified as shown in FIGS.

  FIG. 5 is an example in which the second reflection surface 12b is formed in a predetermined range from the straight lines L3 and L4 to the rear without forming the antireflection range, and FIG. 6 is a light distribution pattern formed in the case of FIG. It is an example. Referring to FIGS. 5 and 6, in the case of FIG. 5, the reflected light from the first reflecting surface 11b is reflected in the entire range corresponding to the ranges A1 and A2 surrounded by the straight lines L1 to L4 shown in FIG. It can be seen that, due to this, dazzling light appears above the horizontal line H.

  FIG. 7 is an example in which the antireflection range 12a is formed in the range surrounded by the straight lines L3 to L5, and the second reflection surface 12b is formed in a predetermined range from the straight line L5 to the rear. FIG. It is an example of the light distribution pattern formed in a case. The straight line L5 is a straight line that is orthogonal to the optical axis AX in the horizontal plane including the optical axis AX of the lens surface 13a and passes through the second focal point F2 of the first reflecting surface 11b. Referring to FIGS. 7 and 8, in the case of FIG. 7, the reflected light from the first reflecting surface 11b is part of the range corresponding to the ranges A1 and A2 surrounded by the straight lines L1 to L4 shown in FIG. It can be seen that the light is reflected and that due to this, dazzling light appears above the horizontal line H.

  FIG. 9 is an example in which the antireflection range 12a is formed in the range surrounded by the straight lines L1 to L4, and the second reflecting surface 12b is formed in a predetermined range from the straight lines L1 and L2 to the rear. 9 is an example of a light distribution pattern formed in the case of No. 9; Referring to FIGS. 9 and 10, in the case of FIG. 9, the reflected light from the first reflecting surface 11b is reflected in the entire range corresponding to the ranges A1 and A2 surrounded by the straight lines L1 to L4 shown in FIG. It can be seen that, for this reason, no dazzling light appears above the horizon H. That is, as shown in FIG. 9, if the antireflection range 12a is formed in the range surrounded by the straight lines L1 to L4, and the second reflection surface 12b is formed in the predetermined range from the straight lines L1 and L2, the horizontal line H It can be seen that there is almost no illusion light above, and it is possible to form a light distribution pattern suitable for a headlamp.

  FIG. 11 is an example in which an antireflection range 12a is formed in a range surrounded by straight lines L1, L2, and L5, and a second reflection surface 12b is formed in a predetermined range from the straight lines L1 and L2 to the rear. FIG. 12 is an example of a light distribution pattern formed in the case of FIG. Referring to FIGS. 11 and 12, in the case of FIG. 11, the reflected light from the first reflecting surface 11b is part of the range corresponding to the ranges A1 and A2 surrounded by the straight lines L1 to L4 shown in FIG. It can be seen that the light is reflected and that due to this, dazzling light appears above the horizontal line H.

  FIG. 13 is an example in which the antireflection range 12a is formed in the range surrounded by the straight lines L3 to L5, and the second reflecting surface 12b is formed in a predetermined range from the straight lines L1 and L2 to the rear. 13 is an example of a light distribution pattern formed in the case of 13. Referring to FIGS. 13 and 14, in the case of FIG. 13, the reflected light from the first reflecting surface 11 b is part of the range corresponding to the ranges A1 and A2 surrounded by the straight lines L1 to L4 shown in FIG. It can be seen that the light is reflected and that due to this, dazzling light appears above the horizontal line H.

  FIG. 15 is an example in which the second reflection surface 12b is formed in a predetermined range from the straight line L5 to the rear without forming the antireflection range, and FIG. 16 is an example of a light distribution pattern formed in the case of FIG. is there. Referring to FIGS. 15 and 16, in the case of FIG. 15, the reflected light from the first reflecting surface 11b is part of the range corresponding to the ranges A1 and A2 surrounded by the straight lines L1 to L4 shown in FIG. It can be seen that the light is reflected and that due to this, dazzling light appears above the horizontal line H.

  As described above, as a result of the verification shown in FIGS. 5 to 16, a range in which the plurality of parallel rays incident from the lens surface 13 a spread (for example, the ranges A <b> 1 and A <b> 2 surrounded by the four straight lines L <b> 1 to L <b> 4 in FIG. 4). If the anti-reflection range 12a is formed, the reflection light that causes the illusion light can be prevented or reduced from entering the lens surface 13a. Therefore, the illusion light hardly appears above the horizontal line H, and the head lamp It can be confirmed that a suitable light distribution pattern can be formed.

  In the present embodiment, based on the above knowledge and idea, the antireflection range is within the range corresponding to the ranges A1 and A2 surrounded by the straight lines L1 to L4 shown in FIG. 4 in the horizontal plane including the optical axis AX of the lens surface 13a. 12a is formed.

  In the present embodiment, the antireflection range 12a is an antireflection process (for example, a low reflectance such as black, so that the reflected light from the first reflection surface 11b reaching the range 12a is not reflected toward the lens surface 13a. It is formed as an anti-reflective surface that has been subjected to scattering treatment such as coating and embossing. Specifically, in the antireflection range 12a, a plurality of parallel rays having different inclination angles with respect to the optical axis AX of the lens surface 13a from the lens surface 13a in the horizontal plane including the optical axis AX of the lens surface 13a are incident on the inside of the lens. In this case, the plurality of parallel rays are formed in a range (a range corresponding to the ranges A1 and A2 surrounded by the straight lines L1 to L4 shown in FIG. 4).

  The second reflecting surface 12b is a reflecting surface that reflects the reflected light from the first reflecting surface 11b that has reached the second reflecting surface 12b toward the lens surface 13a, and is a horizontal surface that includes the optical axis AX of the lens surface 13a. Among these, it is formed in a predetermined range from the rear end edges 12a1 and 12a2 (corresponding to the straight lines L1 and L2 shown in FIG. 4) to the rear of the antireflection range 12a. Specifically, the second reflecting surface 12b is a metal (aluminum or the like) deposited in a predetermined range from the rear end edges 12a1 and 12a2 of the antireflection range 12a to the rear in the horizontal plane including the optical axis AX of the lens surface 13a. It is formed by processing. In addition, in order to form a cut-off line on the second reflecting surface 12b, it extends along the optical axis AX of the lens surface 13a, and rear end edges 12a1, 12a2 of the antireflection range 12a (rear end edges 12a1, 12a2 in each figure). A step portion 12b1 is formed to reach the intersection point.

  The rear end edges 12a1 and 12a2 of the antireflection range 12a are formed in shapes corresponding to the straight lines L1 and L2 shown in FIG. The front end edges 12a3 and 12a4 of the anti-reflection range 12a are formed in a shape corresponding to the straight lines L3 and L4 shown in FIG. 4, and extend downward from the lens surface 13a and continuously outside the lens surface 13a. It is formed in a convex convex shape 12c. The convex shape 12c is preferably subjected to an antireflection treatment similar to the antireflection range 12a in order to prevent the reflected light from the first reflecting surface 11b from being reflected. The hatched portion in FIG. 2 represents a state where antireflection processing has been performed. In addition, since the convex shape 12c is a convex shape outward, the reflected light reflected toward the lens surface 13a from the first reflective surface 11b is not blocked.

Next, the front lens unit 13 will be described. The front lens unit 13 includes a lens surface 13a. The lens surface 13a is an exit surface from which the reflected light from the first reflecting surface 11b and the reflected light from the second reflecting surface 12b exit, and is formed as an aspheric lens surface.
In the vehicular lamp 100 having the above-described configuration, the irradiation light from the light source 20 enters the lens from the incident surface 11a, is reflected by the first reflecting surface 11b, and is condensed at the second focal point F2, and then the lens surface 13a. Is transmitted forward and forms part of the light distribution pattern P shown in FIG. Further, the irradiated light that has been irradiated from the light source 20, is incident on the inside of the lens body 10 from the incident surface 11 a, is reflected by the first reflecting surface 11 b, and reaches the antireflective range 12 a and the second reflecting surface 12 b, is prevented. And is reflected by the second reflecting surface 12b, is transmitted forward through the lens surface 13a, and forms a light distribution pattern P having a clear cut-off line CL shown in FIG.

  As described above, according to the vehicular lamp 100 of the present embodiment, among the horizontal surfaces including the optical axis AX of the lens surface 13a, a plurality of inclination angles from the lens surface 13a to the optical axis AX of the lens surface 13a are different. When the parallel rays are incident on the inside of the lens, the reflection preventing range 12a formed in the range in which the plurality of parallel rays spread (the range corresponding to the range surrounded by the four straight lines L1 to L4 shown in FIG. 4). By the action, it becomes possible to prevent or reduce the reflected light that causes the illusion light from entering the lens surface 13a. For this reason, according to the vehicular lamp 100 of the present embodiment, there is provided a vehicular lamp that is capable of forming a light distribution pattern suitable for a headlamp with almost no illusion light appearing above the horizon H. Is possible.

  Next, a modified example will be described.

  In the above embodiment, by forming the antireflection range 12a in the range corresponding to the ranges A1 and A2 surrounded by the straight lines L1 to L4 shown in FIG. 4 in the horizontal plane including the optical axis AX of the lens surface 13a, Although the example which prevented the reflected light which causes a dazzling light injecting into the lens surface 13a was demonstrated, this invention is not limited to this.

  For example, as shown in FIGS. 18 to 20, a range corresponding to the antireflection range 12 a may be formed in a protruding shape 12 d extending outside the lens body 10 (downward in each figure). If the protrusion shape 12d is formed in an appropriate shape, it is possible to prevent or reduce the incidence of the reflected light that causes the illusion light on the lens surface 13a, as in the above embodiment, so that the illusion light is above the horizontal line H. Almost no light appears, and a light distribution pattern suitable for a headlamp can be formed. The protrusion shape 12d is preferably subjected to an antireflection treatment similar to that of the antireflection range 12a in order to prevent the reflected light from the first reflecting surface 11b from being reflected. The hatched portion in FIG. 19 represents a state where antireflection processing has been performed.

  In the above embodiment, the rear end edges 12a1 and 12a2 of the antireflection range 12a have been described as two straight lines (corresponding to the straight lines L1 and L2 shown in FIG. 4). It is not limited. For example, the rear end edges 12a1 and 12a2 of the antireflection range 12a may be a single straight line or a curved line. Similarly, the front end edges 12a3 and 12a4 of the antireflection range 12a may be a single straight line or a curved line.

  Moreover, in the said embodiment, although the reflection prevention range 12a and the 2nd reflective surface 12b demonstrated as having been formed in the horizontal surface containing the optical axis AX of the lens surface 13a, this invention is not limited to this. For example, the antireflection range 12a and the second reflection surface 12b are slightly inclined above and below the horizontal plane including the optical axis AX of the lens surface 13a or the plane slightly inclined with respect to the horizontal plane including the optical axis AX of the lens surface 13a. You may form in the plane formed in the shifted position.

  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.

It is a perspective view of the vehicular lamp which is one embodiment of the present invention. It is a side view of the vehicle lamp shown in FIG. It is a bottom view of the vehicle lamp shown in FIG. It is a figure for demonstrating the technical significance of the reflection preventing range 12a. In this example, the second reflection surface 12b is formed in a predetermined range from the straight lines L3 and L4 to the rear without forming the antireflection range. It is an example of the light distribution pattern formed in the case of FIG. This is an example in which an antireflection range 12a is formed in a range surrounded by straight lines L3 to L5, and a second reflection surface 12b is formed in a predetermined range from the straight line L5 to the rear. It is an example of the light distribution pattern formed in the case of FIG. In this example, an antireflection range 12a is formed in a range surrounded by straight lines L1 to L4, and a second reflection surface 12b is formed in a predetermined range from the straight lines L1 and L2 to the rear. It is an example of the light distribution pattern formed in the case of FIG. In this example, the antireflection range 12a is formed in a range surrounded by the straight lines L1, L2, and L5, and the second reflecting surface 12b is formed in a predetermined range from the straight lines L1 and L2 to the rear. It is an example of the light distribution pattern formed in the case of FIG. In this example, an antireflection range 12a is formed in a range surrounded by straight lines L3 to L5, and a second reflection surface 12b is formed in a predetermined range from the straight lines L1 and L2 to the rear. It is an example of the light distribution pattern formed in the case of FIG. In this example, the second reflection surface 12b is formed in a predetermined range from the straight line L5 to the rear without forming the antireflection range. It is an example of the light distribution pattern formed in the case of FIG. It is an example of the light distribution pattern formed with the vehicle lamp shown in FIGS. It is a perspective view of the vehicular lamp (modification) which is one embodiment of the present invention. It is a side view of the vehicle lamp (modification example) shown in FIG. It is a bottom view of the vehicle lamp (modification) shown in FIG. It is a figure for demonstrating the structure of the conventional vehicle lamp. It is a figure for demonstrating the light distribution pattern formed with the conventional vehicle lamp.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Optical unit, 10 ... Lens body, 11 ... Rear lens part, 11a ... Incident surface, 11b ... 1st reflective surface, 11c ... Lower surface, 12 ... Central lens part, 12a ... Lower surface, 12a ... Antireflection range, 12b ... Second reflecting surface, 12a1 ... rear end edge, 12a2 ... rear end edge, 12a3 ... front end edge, 12a4, front end edge, 12b1 ... stepped portion, 12c ... convex surface shape, 12d ... projection shape, 13 ... front lens portion, 13a ... Lens surface, AX ... optical axis, CL ... cut-off line, F1 ... first focus, F2 ... second focus, H ... horizontal line, L1-L4 ... straight line, P ... light distribution pattern 1

Claims (5)

In a vehicle lamp comprising a light source and a solid lens body in which a rear lens unit, a central lens unit, and a front lens unit are integrally formed,
An incident surface and a first reflecting surface are formed on the surface of the rear lens portion,
An antireflection range and a second reflection surface are formed on the surface of the central lens portion,
A lens surface is formed on the surface of the front lens portion,
The incident surface is an incident surface that allows irradiation light from the light source to enter the inside of the lens,
The first reflective surface is incident on the inside of the lens from the incident surface, and irradiates the light from the light source that has reached the first reflective surface in the vicinity of the rear edge of the antireflection surface, and the lens surface Is a reflection surface that reflects toward the light source, is formed in a range that covers the irradiation direction of the light source from the side of the light source,
The antireflection range and the second reflection surface are formed between the light source and the lens surface,
The antireflection range is formed in a range in which the plurality of parallel rays spread from the lens surface when a plurality of parallel rays having different inclination angles with respect to the optical axis of the lens surface are incident on the inside of the lens,
The second reflecting surface is a reflecting surface that reflects reflected light from the first reflecting surface that has reached the second reflecting surface toward the lens surface, and extends from the rear edge of the antireflection range to the rear. It is formed in a predetermined range,
The vehicular lamp, wherein the lens surface is an exit surface from which reflected light from the first reflecting surface and reflected light from the second reflecting surface are emitted, and is formed as an aspheric lens surface. .   The vehicular lamp according to claim 1, wherein the antireflection range and the second reflection surface are formed on a horizontal plane including an optical axis of the lens surface.   When a plurality of parallel rays having different inclination angles from the lens surface with respect to the optical axis of the lens surface are incident on the inside of the lens body, an antireflection treatment is applied to a range where the plurality of parallel rays spread. The vehicular lamp according to claim 1, wherein a surface is formed.   When a plurality of parallel rays having different inclination angles with respect to the optical axis of the lens surface from the lens surface are incident on the inside of the lens body, a protrusion shape extending outside the lens body is within a range in which the plurality of parallel rays spread The vehicular lamp according to claim 1, wherein the vehicular lamp is formed. In the solid lens body used in the vehicular lamp, the rear lens portion, the central lens portion and the front lens portion are integrally formed.
An incident surface and a first reflecting surface are formed on the surface of the rear lens portion,
An antireflection range and a second reflection surface are formed on the surface of the central lens portion,
A lens surface is formed on the surface of the front lens portion,
The incident surface is an incident surface that allows irradiation light from the light source to enter the inside of the lens,
The first reflective surface is incident on the inside of the lens from the incident surface, and irradiates the light from the light source that has reached the first reflective surface in the vicinity of the rear edge of the antireflection surface, and the lens surface Is a reflection surface that reflects toward the light source, is formed in a range that covers the irradiation direction of the light source from the side of the light source,
The antireflection range and the second reflection surface are formed between the light source and the lens surface,
The antireflection range is formed in a range in which the plurality of parallel rays spread from the lens surface when a plurality of parallel rays having different inclination angles with respect to the optical axis of the lens surface are incident on the inside of the lens,
The second reflecting surface is a reflecting surface that reflects reflected light from the first reflecting surface that has reached the second reflecting surface toward the lens surface, and extends from the rear edge of the antireflection range to the rear. It is formed in a predetermined range,
The lens body is an exit surface from which reflected light from the first reflecting surface and reflected light from the second reflecting surface are emitted, and is formed as an aspheric lens surface.

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