JP2014060040A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in a conventional vehicular lighting fixture that a light emission pattern in which light emission surfaces and non-light emission surfaces are alternately arranged cannot be obtained.SOLUTION: A vehicular lighting fixture includes a lamp housing, a lamp lens, a semiconductor type light source 1, and a lens member 2. The lens member 2 has a first incident surface 201, a second incident surface 202, a first emission surface 211, a second emission surface 212, two third emission surfaces 213, 214, a first reflection surface 221, a second reflection surface 222, two third reflection surfaces 223, 224, a first non-light emission surface, a second non-light emission surface, and a third non-light emission surface. As a result, the vehicular lighting fixture can obtain a light emission pattern in which light emission surfaces of the emission surfaces 211, 212, 213, 214 and non-light emission surfaces are alternately arranged.

Description

  The present invention relates to a vehicular lamp that includes a semiconductor light source and a lens member, and has a wide light emission range. For example, the tail lamp, stop lamp, tail / stop lamp, clearance lamp, turn signal lamp, rear The present invention relates to a vehicular lamp such as a fog lamp and a daytime running lamp.

  This type of vehicular lamp is conventionally known (for example, Patent Document 1). Hereinafter, a conventional vehicle lamp will be described. A conventional vehicular lamp includes a light source and an optical piece, and the optical piece has an incident surface, a reflecting surface, and an exit surface. Light from the central portion of the light source enters the optical piece from the central portion of the incident surface and exits to the outside from the central portion of the emission surface. The light from the side of the light source is incident on the optical piece from the side of the incident surface, reflected by the side of the exit surface, reflected by the reflective surface, and emitted to the outside from the side of the exit surface. . Thereby, a large emission surface, that is, a light emission range is obtained.

JP 2004-134357 A

  However, in the conventional vehicular lamp, since the emission surface emits light over almost the entire surface, the light emission pattern in which the light emission surfaces arranged alternately with the non-light emission surface emit light on the emission surface, that is, the light emission surface. A light emission pattern in which non-light emitting surfaces are alternately arranged cannot be obtained.

  The problem to be solved by the present invention is that a conventional vehicle lamp cannot obtain a light emission pattern in which light emitting surfaces and non-light emitting surfaces are alternately arranged.

  The present invention (the invention according to claim 1) includes a lamp housing and a lamp lens that define a lamp chamber, and a semiconductor-type light source and a lens member disposed in the lamp chamber, and the lens member is a semiconductor-type light source. A first incident surface that makes light emitted from the central portion incident as parallel light, a second incident surface that makes light emitted from a side portion of the semiconductor-type light source incident as parallel light, and a parallel light incident from the first incident surface A first emission surface that emits light as parallel light perpendicular to the measurement screen, a first reflection surface that totally reflects a part of the parallel light incident from the second incident surface as parallel reflected light, and a first reflection surface A second emission surface that emits the parallel reflected light totally reflected in step 1 as parallel light perpendicular to the measurement screen, and a second reflection surface that totally reflects the remainder of the parallel light incident from the second incident surface as parallel reflected light; Second reflection One or a plurality of third reflecting surfaces that totally reflect the parallel reflected light totally reflected as one or a plurality of light fluxes as a parallel reflected light, and one or a plurality of third reflected surfaces that are totally reflected by one or a plurality of third reflecting surfaces One or a plurality of third exit surfaces that emit parallel reflected light of the luminous flux as parallel light perpendicular to the measurement screen, between the first exit surface and the second exit surface, and between the second exit surface and one And a non-light-emitting surface provided between each of the third emission surfaces or between the plurality of third emission surfaces and the third emission surfaces.

  In this invention (the invention according to claim 2), the first incident surface is a refracting surface of a rotating hyperboloid formed by rotating a hyperbola with a semiconductor-type light source as a focal point with the main axis of the hyperbola as a rotation axis. The incident surface is a refracting surface formed by rotating a hyperbola with a semiconductor-type light source as a focal point about the rotation axis of the first incident surface as a rotation axis. The first reflection surface, the second reflection surface, one or a plurality of first reflection surfaces The three reflecting surfaces are reflecting surfaces obtained by rotating a straight line around the rotation axis of the first incident surface, and the first emitting surface is a circular emitting surface centered on the rotation axis of the first incident surface. The second emission surface, the one or more third emission surfaces, and the non-light emitting surface are an annular emission surface and a non-light emitting surface centering on the rotation axis of the first incident surface. .

  In the present invention (the invention according to claim 3), the distance from the apex of the hyperbola that forms the first incident surface to the semiconductor-type light source is greater than the distance from the apex of the hyperbola that forms the second incident surface to the semiconductor-type light source. It is small.

  According to the present invention (the invention according to claim 4), diffusion that diffuses parallel light is at least part of one of the first emission surface, the second emission surface, and the one or more third emission surfaces. A portion is provided.

  The vehicular lamp of the present invention includes a first emission surface, a second emission surface, one or a plurality of third emission surfaces, a space between the first emission surface and the second emission surface, and a second emission surface and one first emission surface. A non-light-emitting surface provided between each of the three light-emitting surfaces or between the plurality of third light-emitting surfaces and the third light-emitting surfaces provides a light-emitting pattern in which the light-emitting surfaces and the non-light-emitting surfaces are alternately arranged. In addition, the light emission range can be expanded.

FIG. 1 is a front view of a semiconductor light source and a lens member (a front view seen from the lens member) showing an embodiment of a vehicular lamp according to the present invention. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 shows a first incident surface, a second incident surface, a first output surface, a first reflection surface, a second output surface, a second reflection surface, two third reflection surfaces, and two third output surfaces of the lens member. It is explanatory drawing which shows. FIG. 4 is an explanatory diagram showing an optical path in the lens member. FIG. 5 is an explanatory diagram showing a relative relationship between the distance between the first incident surface of the lens member and the semiconductor light source and the distance between the second incident surface and the semiconductor light source. FIG. 6 illustrates the first and second emission surfaces of the lens member, the light emission surfaces of the two third emission surfaces, the first emission surface and the second emission surface, and the second emission surface and one third emission surface. It is explanatory drawing which shows the light emission pattern by which the non-light-emitting surface each provided between the output surfaces and between the two 3rd output surfaces and the 3rd output surfaces was alternately arranged.

  DESCRIPTION OF EMBODIMENTS Embodiments (examples) of a vehicular lamp according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In the description of the claims, “parallel” defines “parallel or substantially parallel”, and “vertical” defines “vertical or substantially vertical”.

(Description of Configuration of Embodiment)
Hereinafter, the configuration of the vehicular lamp in this embodiment will be described. The vehicular lamp of this embodiment includes a lamp housing (not shown) and a lamp lens (not shown) that define a lamp chamber (not shown), a semiconductor light source 1 and a lens member that are arranged in the lamp chamber. 2 is provided.

  In this example, the semiconductor light source 1 and the lens member 2 constitute a lamp unit of a tail lamp. The semiconductor light source 1 and the lamp unit of the tail lamp of the lens member 2 are arranged in one or more units in the lamp chamber. The lamp units of the tail lamps of the semiconductor-type light source 1 and the lens member 2 constitute a rear combination lamp together with the lamp units of other functions. The rear combination lamps are mounted on both the left and right sides of the rear portion of the vehicle (not shown).

(Description of the semiconductor-type light source 1)
In this example, the semiconductor light source 1 is a self-luminous semiconductor light source such as an LED or an EL (organic EL). The semiconductor-type light source 1 has a package structure in which a light emitting chip (LED chip) 11 is sealed with a sealing resin member. The semiconductor light source 1 is mounted on a substrate 10 as shown in FIG. The substrate 10 is attached to the lamp housing via an attachment member or the like (not shown). The semiconductor light source 1 is supplied with power through the substrate 10. As shown in FIG. 4, the lights L1 and L3 from the light emitting chip 11 of the semiconductor-type light source 1 have a wide hemispherical shape (a solid angle with the light emitting chip 11 as a point (corner apex) is about 180 °). Radiated.

(Description of the lens member 2)
As shown in FIG. 1, the lens member 2 has a circular shape when viewed from the front (the shape when the rear part of the vehicle is viewed from the rear of the vehicle), and has a thin cross-sectional shape as shown in FIG. 2. Make a shape. In this example, the lens member 2 is made of a transparent resin material such as PC (polycarbonate) or PMMA (polymethyl methacrylate, methacrylic resin). The lens member 2 is attached to the lamp housing via an attachment member or the like (not shown). That is, the semiconductor-type light source 1 and the lens member 2 are attached to the lamp housing in a state where the relative attachment position is maintained.

  The lens member 2 includes a first entrance surface 201, a second entrance surface 202, a first exit surface 211, a second exit surface 212, two third exit surfaces 213 and 214, and a first reflection surface 221. A second reflective surface 222, two third reflective surfaces 223 and 224, a first non-light emitting surface 231, a second non-light emitting surface 232, and one third non-light emitting surface 233. is there.

  The first incident surface 201 is light emitted from the central portion of the light emitting chip 11 of the semiconductor light source 1 (the central portion having a solid angle of about 80 ° with the light emitting chip 11 as a point (corner apex)). This is a surface on which L1 is incident as parallel light or substantially parallel light (hereinafter simply referred to as “parallel light”) L2. The parallel light L2 is parallel or substantially parallel to the optical axis O of the lens member 2. The first incident surface 201 is provided at the center of the surface of the lens member 2 facing the semiconductor light source 1. That is, the first incident surface 201 is provided corresponding to the central portion of the semiconductor light source 1. The first incident surface 201 rotates a hyperbola having the light emitting chip 11 of the semiconductor-type light source 1 or the vicinity thereof as a focal point F1 with the main axis of the hyperbola (the optical axis O of the lens member 2) as a rotation axis. This is a refracting surface of a rotating hyperboloid.

  The second incident surface 202 is a side of the semiconductor light source 1 on the side of the light emitting chip 11 (a solid angle with the light emitting chip 11 as a point (corner apex) between about 80 ° and about 180 °). This is a surface on which the light L3 radiated from the light is incident as parallel light or substantially parallel light (hereinafter simply referred to as “parallel light”) L4. The second incident surface 202 is provided on the side of the surface of the lens member 2 that faces the semiconductor light source 1. That is, the first incident surface 201 is a side portion of the central first incident surface 201 and is provided corresponding to the side portion of the semiconductor light source 1. The second incident surface 202 is a refracting surface obtained by rotating a hyperbola with the light emitting chip 11 of the semiconductor-type light source 1 or the vicinity thereof as a focal point F2 around the rotation axis of the first incident surface 201 as a rotation axis. .

  As shown in FIG. 5, the distance T1 from the top of the hyperbola that forms the first incident surface 201 to the light emitting chip 11 of the semiconductor light source 1 is the top of the hyperbola that forms the second entrance surface 202. Is smaller than the distance T2 from the semiconductor-type light source 1 to the light-emitting chip 11.

  The first exit surface 211 is configured to cause the parallel light L2 incident from the first entrance surface 201 to be parallel or substantially perpendicular to the measurement screen (not shown) or substantially parallel light (hereinafter simply referred to as “parallel light”). It is a surface to be emitted as L5. The parallel light L5 is parallel or substantially parallel to the optical axis O of the lens member 2. The first exit surface 211 is provided at the center of the surface of the lens member 2 opposite to the surface facing the semiconductor light source 1. That is, the first exit surface 211 is provided corresponding to the first entrance surface 201 and the central portion of the semiconductor light source 1. The first emission surface 211 is basically (basic) a surface that is horizontal or substantially horizontal with respect to the optical axis O of the lens member 2. The first emission surface 211 has a circular shape centered on the optical axis O of the lens member 2.

  The first reflecting surface 221 is a portion of the parallel light L4 incident from the second incident surface 202 that is parallel or substantially parallel to the optical axis O of the lens member 2 or substantially parallel reflected light (hereinafter, referred to as “parallel reflected light”). This surface is totally reflected as L6 (simply referred to as “parallel reflected light”). The first reflecting surface 221 is provided on the outer side of the second incident surface 202 of the surface of the lens member 2 facing the semiconductor light source 1. That is, the first reflection surface 221 is a reflection surface obtained by rotating a straight line about the rotation axis of the first incident surface 201 as a rotation axis. The straight line forming the first reflecting surface 221 is inclined from the central portion to the side portion of the lens member 2 from the second incident surface 202 side (lower side) to the second emission surface 212 side (upper side). ing. An angle formed by the straight line forming the first reflecting surface 221 and the hyperbola forming the second incident surface 202 is close to about 90 °.

  The second emission surface 212 converts the parallel reflected light L6 totally reflected by the first reflecting surface 221 into parallel light or substantially parallel light (hereinafter simply referred to as “parallel light”) with respect to the measurement screen. This is a surface to be emitted as L7. The parallel light L7 is parallel or substantially parallel to the optical axis O of the lens member 2. The second emission surface 212 is provided on the outer side of the first emission surface 211 on the surface of the lens member 2 opposite to the surface facing the semiconductor light source 1. The second emission surface 212 is basically a surface that is inclined from the center to the side of the lens member 2 from the first reflection surface 221 side (lower side) to the first emission surface 211 side (upper side). (Keynote). The second exit surface 212 has an annular shape centered on the optical axis O of the lens member 2.

  The second reflecting surface 222 uses the second parallel light L4 incident from the second incident surface 202 as the parallel reflected light or substantially parallel reflected light (hereinafter simply referred to as “parallel reflected light”) L8. 3 is a surface for total reflection on the reflecting surfaces 223 and 224 side, that is, on the side of the lens member 2. The second reflection surface 222 is provided on the outer side of the second emission surface 212 on the surface opposite to the surface of the lens member 2 facing the semiconductor light source 1. The second reflecting surface 222 is a reflecting surface formed by rotating a straight line about the rotation axis of the first incident surface 201 as a rotation axis. The straight line forming the second reflecting surface 222 is inclined from the center portion to the side portion of the lens member 2 from the first reflecting surface 221 side (lower side) to the second emitting surface 212 side (upper side). ing.

  The two third reflecting surfaces 223 and 224 divide the parallel reflected light L8 totally reflected by the second reflecting surface 222 into two light beams, and are parallel or substantially parallel to the optical axis O of the lens member 2. These are surfaces that are totally reflected as parallel reflected light or almost parallel reflected light (hereinafter simply referred to as “parallel reflected light”) L9 and L10 of two light beams. The two third reflection surfaces 223 and 224 are provided on the outer side of the first reflection surface 221 on the surface of the lens member 2 facing the semiconductor light source 1. That is, the two third reflection surfaces 223 and 224 are reflection surfaces obtained by rotating a straight line around the rotation axis of the first incident surface 201 as a rotation axis. The straight line forming the two third reflection surfaces 223 and 224 is a side from the center of the lens member 2 from the first reflection surface 221 side (lower side) to the second reflection surface 222 side (upper side). It is inclined to the part.

  The two third exit surfaces 213 and 214 are parallel or substantially parallel to the parallel reflected light L9 and L10 that are totally reflected by the two third reflective surfaces 223 and 224 with respect to the measurement screen. It is a surface that emits light (hereinafter simply referred to as “parallel light”) L11 and L12. The parallel lights L11 and L12 are parallel or substantially parallel to the optical axis O of the lens member 2. The two third emission surfaces 213 and 214 are provided on the outer side of the second reflection surface 222 on the surface opposite to the surface of the lens member 2 facing the semiconductor light source 1. The two third emission surfaces 213 and 214 are formed from the center portion to the side portion of the lens member 2 from the second anti-slope 222 side (upper side) to the two third reflection surfaces 223 and 224 side (lower side). The surface that is inclined to the base (basic tone). The two third emission surfaces 213 and 214 have an annular shape centered on the optical axis O of the lens member 2.

  The first emission surface 211, the second emission surface 212, and the two third emission surfaces 213, 214 are provided with diffusing portions 24 for diffusing the parallel lights L5, L7, L11, L12, respectively. The diffusion unit 24 is composed of, for example, a fisheye prism.

  The first non-light-emitting surface 231, the second non-light-emitting surface 232, and the one third non-light-emitting surface 233 are the surfaces of the lens member 2 opposite to the surface facing the semiconductor light source 1, Between one reflective surface 211 and the second reflective surface 212, between the second reflective surface 212 and one third reflective surface 213, and between two third reflective surfaces 213 and 214, respectively. It is provided in an annular shape. The second non-light-emitting surface 232 and the third non-light-emitting surface 233 and the surface of the lens member 2 facing the semiconductor light source 1, the second non-light-emitting surface 232 and the third non-light-emitting surface 233. Is a plane parallel to or substantially parallel to the optical path of the parallel reflected light L8. As a result, the thickness of the outer portion of the lens member 2, that is, the portion where the second non-light emitting surface 232 and the third non-light emitting surface 233 are provided can be reduced. As a result, the material for the lens member 2 can be reduced, and the manufacturing cost can be reduced.

  Here, the light (the parallel lights L5, L7, L11, and L12) emitted from the first emission surface 211, the second emission surface 222, and the third emission surfaces 213 and 214 of the lens member 2 is Light distribution control and light distribution design are facilitated when the light is parallel or substantially parallel to the measurement screen.

(Description of the operation of the embodiment)
The vehicular lamp in this embodiment is configured as described above, and the operation thereof will be described below.

  The light emitting chip 11 of the semiconductor light source 1 is turned on. Then, the light L1 emitted from the central portion of the light emitting chip 11 of the semiconductor light source 1 is converted into parallel light L2 parallel to the optical axis O of the lens member 2 from the first incident surface 201 of the lens member 2 into the lens member 2. Incident. On the other hand, the light L3 emitted from the side of the light emitting chip 11 of the semiconductor light source 1 enters the lens member 2 from the second incident surface 202 of the lens member 2 as parallel light L4.

  The parallel light L2 incident on the lens member 2 from the first incident surface 201 is parallel to the first emission surface 211 of the lens member 2 and perpendicular to the measurement screen and parallel to the optical axis O of the lens member 2. The light is emitted to the outside as light L5.

  On the other hand, a part of the parallel light L4 incident on the lens member 2 from the second incident surface 202 is entirely reflected as the parallel reflected light L6 parallel to the optical axis O of the lens member 2 on the first reflecting surface 221 of the lens member 2. reflect. The parallel reflected light L6 is emitted to the outside from the second emission surface 212 of the lens member 2 as parallel light L7 that is perpendicular to the measurement screen and parallel to the optical axis O of the lens member 2.

  Further, the remainder of the parallel light L4 incident on the lens member 2 from the second incident surface 202 is totally reflected on the second reflecting surface 222 of the lens member 2 as parallel reflected light L8. The parallel reflected light L8 is divided into two light beams by the two third reflecting surfaces 223 and 224 of the lens member 2, and the parallel reflected lights L9 and L10 of the two light beams parallel to the optical axis O of the lens member 2. As a total reflection. The parallel reflected lights L9 and L10 of the two light beams are parallel light L11 that is perpendicular to the measurement screen and parallel to the optical axis O of the lens member 2 from the two third emission surfaces 213 and 214, respectively. The light is emitted to the outside as L12.

  As shown in FIG. 6, the parallel lights L5, L7, L11, and L12 are emitted from the first emission surface 211, the second emission surface 212, and the two third reflection surfaces 213 and 214 of the lens member 2 to the outside. The first emission surface 211 emits light in a circular shape, while the second emission surface 212 and the two third reflection surfaces 213 and 214 emit light in an annular shape. The first non-light emitting surface 231 between the first reflecting surface 211 and the second reflecting surface 212, the second non-light emitting surface 232 between the second reflecting surface 212 and one third reflecting surface 213, The third non-light-emitting surface 233 between the third reflecting surfaces 213 and 214 is in a non-light-emitting (non-light-emitting) state in an annular shape.

  The parallel lights L5, L7, L11, and L13 are emitted from the first emission surface 211 when emitted from the first emission surface 211, the second emission surface 212, and the two third reflection surfaces 213 and 214 of the lens member 2. The light is diffused in the diffusion portion 24 and the diffusion portion 24 of the second emission surface 212 and in the diffusion portions 24 of the two third emission surfaces 213 and 214.

(Explanation of effect of embodiment)
The vehicular lamp in this embodiment has the configuration and operation as described above, and the effects thereof will be described below.

  The vehicular lamp in this embodiment includes a first emission surface 211, a second emission surface 212, two third emission surfaces 213, 214, a space between the first emission surface 211 and the second emission surface 212, and a second emission surface. The first non-light-emitting surface 231 and the second non-light-emitting surface 232 and one first light-emitting surface 231 provided between the surface 212 and one third light-emitting surface 213 and between the two third light-emitting surfaces 213 and 214, respectively. As shown in FIG. 6, the non-light emitting surface 233 and the non-light emitting surface (blank surface in FIG. 6) and the non-light emitting surface (the blank paper surface in FIG. 6) are alternately arranged. A light emission pattern can be obtained, and the light emission range can be expanded.

  In particular, as shown in FIG. 6, the vehicular lamp in this embodiment includes a circular first emission surface 211, an annular second emission surface 212, and two annular third emission surfaces 213 and 214. A light emission pattern in which the first non-light emitting surface 231 having an annular shape, the second non-light emitting surface 232 having an annular shape, and the third non-light emitting surface 233 having an annular shape are alternately arranged can be obtained. .

  In addition, the vehicular lamp according to the present embodiment has a predetermined width (for example, within 15 mm) for the width of the first non-light-emitting surface 231, the width of the second non-light-emitting surface 232, and the width of one third non-light-emitting surface 233. By doing so, it is possible to obtain a light emission pattern that satisfies the regulations.

  In the vehicle lamp in this embodiment, the first reflecting surface 221, the second reflecting surface 222, and the two third reflecting surfaces 223 and 224 are reflected by rotating a straight line about the rotation axis of the first incident surface 201 as a rotation axis. Since it is a surface, it is easier to manufacture, manage production, etc., compared to a reflecting surface made of a concave curved surface.

  In the vehicle lamp in this embodiment, the distance T1 from the top of the hyperbola that forms the first incident surface 201 to the semiconductor-type light source 1 is the distance T2 from the top of the hyperbola that forms the second entrance surface 202 to the semiconductor-type light source 1. Smaller than. As a result, in the vehicular lamp in this embodiment, the hyperbola that forms the second incident surface 202 protrudes closer to the center of the lens member 2 than the hyperbola that forms the first incident surface 201, resulting in an undercut. There is nothing. Thereby, the vehicular lamp in this embodiment does not complicate the molding die of the lens member 2 and can reduce the manufacturing cost accordingly.

  In the vehicle lamp in this embodiment, the diffusing unit 24 emits parallel light L5, L7, L11, and L12 emitted from the first emission surface 211, the second emission surface 212, and the two third emission surfaces 213 and 214 to the outside. Light distribution can be arbitrarily controlled.

(Description of example other than embodiment)
In the above embodiment, the tail lamp of the rear combination lamp will be described. However, in the present invention, a vehicle lamp other than the rear combination lamp tail lamp, for example, a rear combination lamp stop lamp, tail stop lamp, turn signal lamp, clearance lamp, or front combination lamp clearance lamp, turn signal. It can also be applied to lamps and daytime running lamps.

  In the above-described embodiment, the diffusing portion 24 is provided on the first emission surface 211, the second emission surface 212, and the two third emission surfaces 213 and 214. However, in the present invention, the diffusing portion 24 may be provided on one of the first emission surface 211, the second emission surface 212, or the two third emission surfaces 213, 214.

  Further, in the above-described embodiment, the diffusing portion 24 is provided on the entire surface of the first emission surface 211, the entire surface of the second emission surface 212, and the two third emission surfaces 213 and 214. However, in the present invention, the diffusing portion 24 is provided on a part of the first exit surface 211, a part of the second exit surface 212, and a part of the two third exit surfaces 213 and 214. It may be.

  Furthermore, in the said embodiment, it has two 3rd output surfaces 213 and 214 and two 3rd reflective surfaces 223 and 224. FIG. However, in the present invention, even one having a third exit surface, one third reflecting surface, or having three or more third exit surfaces and three or more third reflecting surfaces. good.

DESCRIPTION OF SYMBOLS 1 Semiconductor type light source 10 Substrate 11 Light emitting chip 2 Lens member 201 1st entrance surface 202 2nd entrance surface 211 1st exit surface 212 2nd exit surface 213, 214 3rd exit surface 221 1st reflective surface 222 2nd reflective surface 223 224 Third reflection surface 231 First non-light-emitting surface 232 Second non-light-emitting surface 233 Third non-light-emitting surface 24 Diffuser F1 Hyperbolic focal point of first incident surface F2 Hyperbolic focal point of second incident surface L1, L3 Semiconductor type Light from light source L2, L4 Parallel light incident on lens member L5, L7, L11, L12 Parallel light emitted from lens member L6, L8, L9, L10 Parallel reflected light O Optical axis of lens member T1 of first incident surface Distance from the top of the hyperbola to the semiconductor light source T2 Distance from the top of the hyperbola on the second incident surface to the semiconductor light source

Claims (4)

A lamp housing and a lamp lens that partition the lamp chamber;
A semiconductor-type light source and a lens member disposed in the lamp chamber;
With
The lens member is
A first incident surface on which light emitted from a central portion of the semiconductor-type light source is incident as parallel light;
A second incident surface on which light emitted from a side portion of the semiconductor-type light source is incident as parallel light;
A first exit surface for emitting the parallel light incident from the first entrance surface as parallel light perpendicular to the measurement screen;
A first reflecting surface that totally reflects a part of the parallel light incident from the second incident surface as parallel reflected light;
A second emission surface for emitting the parallel reflected light totally reflected by the first reflection surface as parallel light perpendicular to the measurement screen;
A second reflection surface that totally reflects the remainder of the parallel light incident from the second incident surface as parallel reflected light;
One or more third reflecting surfaces that totally reflect the parallel reflected light totally reflected by the second reflecting surface as parallel reflected light of one or a plurality of light fluxes;
One or more third exit surfaces for emitting the parallel reflected light of one or more light fluxes totally reflected by the one or more third reflecting surfaces as parallel light perpendicular to the measurement screen;
Between the first emission surface and the second emission surface, between the second emission surface and one third emission surface, or between the plurality of third emission surfaces and the third emission surface. A non-light emitting surface provided respectively in
Having
A vehicular lamp characterized by the above. The first incident surface is a refracting surface of a rotating hyperboloid formed by rotating a hyperbola focusing on the semiconductor-type light source about the main axis of the hyperbola as a rotation axis;
The second incident surface is a refracting surface obtained by rotating a hyperbola with the semiconductor-type light source as a focal point about a rotation axis of the first incident surface,
The first reflecting surface, the second reflecting surface, and the one or more third reflecting surfaces are reflecting surfaces obtained by rotating a straight line about the rotation axis of the first incident surface,
The first exit surface is a circular exit surface centered on the rotation axis of the first entrance surface;
The second emission surface, the one or more third emission surfaces, and the non-light-emitting surface are an annular emission surface and a non-light-emitting surface around the rotation axis of the first incident surface,
The vehicular lamp according to claim 1. The distance from the apex of the hyperbola that forms the first incident surface to the semiconductor-type light source is smaller than the distance from the apex of the hyperbola that forms the second incident surface to the semiconductor-type light source,
The vehicular lamp according to claim 2. A diffusion part for diffusing the parallel light is provided in at least a part of at least one of the first emission surface, the second emission surface, and the one or more third emission surfaces.
The vehicular lamp according to any one of claims 1 to 3.

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