JP2008077890A - Vehicular lamp fixture unit and vehicular lamp fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular lamp fixture unit and a vehicular lamp fixture in which even when part of reflecting light from a reflector is reflected on the upper surface of an additional reflector and a light amount is increased as a whole, part of the cut off line lower side of the oncoming lane side can be dimmed smoothly. <P>SOLUTION: The lamp fixture unit includes the reflector 27 to directly reflect the light forward from an LED 25, the additional reflector 29 in which the front end edge 29c is positioned in the vicinity of a backward side focus of a projector lens, in which the cut off line of a light distribution pattern is formed by shielding one part of the reflecting light from the reflector 27 and in which the upper surface 29a extending backward from the front end edge 29c reflects part of the reflecting light from the reflector 27 to the upward side, and the shielding part 49 which is arranged in the vicinity of the front end edge 29c on the upper surface of the additional reflector 29 and one part of the reflecting light from the reflector 27 and part of the reflecting light from the upper surface 29a are shielded. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a so-called projector-type vehicular lamp unit and vehicular lamp, and in particular, forms a cut-off line of a light distribution pattern, and an upper surface extending rearward from a front end edge is one of reflected light from a reflector. The present invention relates to a vehicular lamp unit and an vehicular lamp that include an additional reflector that reflects the portion upward.

  2. Description of the Related Art Conventionally, as a vehicle lamp such as a headlamp, a so-called projector type is known as one of the lamp types. This projector-type vehicular lamp is configured to project and reflect light from a light source arranged on an optical axis toward the front by a reflector toward the optical axis, and this reflected light is provided in front of the reflector. It is comprised so that it may irradiate to a lamp front via.

  Conventional projector-type vehicular lamps use a discharge light emitting part of a discharge bulb, a filament of a halogen bulb, or the like as a light source, but the light source has a certain size as a line segment light source. Therefore, it is difficult to reduce the size of the lamp unit.

  Therefore, Patent Document 1 and Patent Document 2 described below use an LED that is a small light source in a vehicular lamp. However, a lamp using an LED as a light source has a problem that it is difficult to obtain a light distribution pattern with sufficient luminous intensity as compared with a lamp using the same number of discharge bulbs, halogen bulbs, and the like.

  For example, there is a light source unit (lamp unit) disclosed in Patent Document 3 in order to solve such a problem. In this light source unit, a part of the reflected light from the reflector is formed by forming a reflective surface on the upper surface of the additional reflector provided to shield a part of the reflected light from the reflector and form a light distribution pattern having a cutoff line. The light that has been wasted by being shielded by the additional reflector can be effectively used for beam irradiation. Thus, the luminous flux of the lamp using the LED as a light source is increased so that a light distribution pattern having a sufficient luminous intensity can be obtained.

JP 2002-50214 A JP 2001-332104 A JP 2003-317513 A

  However, when a part of the reflected light from the reflector is reflected upward on the upper surface of the additional reflector, the light that was shielded and wasted can be used effectively for beam irradiation, but the effect of the additional reflecting surface As a result, the overall light intensity increased, the light intensity just below the cutoff line on the opposite lane side became too high, and it was sometimes necessary to take measures to control the maximum light intensity.

  Therefore, an object of the present invention is to solve the above-described problems, and even if a part of the reflected light from the reflector is reflected on the upper surface of the additional reflector and the amount of light is increased as a whole, It is an object to provide a vehicular lamp unit and a vehicular lamp that are capable of smoothly dimming a part of a lane-side lower cut-off line.

The above object of the present invention is to provide a projection lens disposed on an optical axis extending in the vehicle longitudinal direction,
A light source disposed behind the rear focal point of the projection lens;
A reflector that reflects direct light from the light source forward and toward the optical axis;
It is arranged between the projection lens and the light source, and the front end edge thereof is located in the vicinity of the rear focal point of the projection lens so that a part of the reflected light from the reflector is shielded to cut off the light distribution pattern cut-off line. And an additional reflector whose upper surface extending backward from the front edge reflects a part of the reflected light from the reflector upward,
A shielding part that is disposed in the vicinity of the front edge of the upper surface of the additional reflector and shields part of the reflected light from the reflector and part of the reflected light from the upper surface;
It is achieved by a vehicular lamp unit characterized by comprising:

  According to the vehicular lamp unit configured as described above, even if a part of the reflected light from the reflector is reflected on the upper surface of the additional reflector, and the amount of light on the lower side of the cut-off line is increased as a whole, the reflector Since a part of the reflected light from the light and a part of the reflected light from the upper surface are shielded by the shielding part, a light reduction region can be formed in a part below the cutoff line.

  In the vehicle lamp unit configured as described above, it is desirable that the shielding portion is formed in a convex shape having a height that does not exceed an imaginary straight line connecting the upper end of the effective reflection surface of the reflector and the front end edge.

  According to the vehicular lamp unit having such a configuration, the height of the shielding portion is set so as not to exceed a virtual straight line connecting the upper end of the effective reflection surface of the reflector and the front end edge of the additional reflector. There is no breakage. Therefore, it is possible to form a dimming region in a portion below the cutoff line while maintaining the cutoff line.

  Further, in the vehicular lamp unit having the above-described configuration, the shielding portion includes a first inclined portion inclined upward from the front end edge side of the upper surface toward the rear, and a side of the upper surface from the optical axis side. It is desirable to form in the convex shape which has the 2nd inclination part which inclines upwards toward it.

  According to the vehicular lamp unit having such a configuration, the reflected light blocked by the shielding portion gradually decreases toward the tip of the shielding portion and the side on the optical axis side. Therefore, it is possible to prevent the dimming region from suddenly darkening, and to darken a part of the dimming region immediately below the cut-off line without any sense of incongruity.

Further, the object of the present invention is to provide a projection lens disposed on an optical axis extending in the vehicle longitudinal direction,
A light source disposed behind the rear focal point of the projection lens;
A reflector that reflects direct light from the light source forward and toward the optical axis;
It is arranged between the projection lens and the light source, and the front end edge thereof is located in the vicinity of the rear focal point of the projection lens so that a part of the reflected light from the reflector is shielded to cut off the light distribution pattern cut-off line. And an additional reflector whose upper surface extending backward from the front edge reflects a part of the reflected light from the reflector upward,
A dimming / reflecting part that is disposed near the front edge of the upper surface of the additional reflector and that attenuates and reflects a portion of the reflected light from the reflector;
It is achieved by a vehicular lamp unit characterized by comprising:

  According to the vehicular lamp unit configured as described above, even if a part of the reflected light from the reflector is reflected on the upper surface of the additional reflector, and the amount of light below the cut-off line is increased overall, Since part of the reflected light from the surface is attenuated by the dimming / reflecting portion, a dimming region can be formed in a part below the cutoff line. In addition, the dimming / reflecting portion can be formed relatively easily by performing a surface treatment or the like as compared with the configuration in which the shielding portion is provided.

  In addition, the object of the present invention is to provide a lamp unit having the highest light concentration in a vehicular lamp in which the vehicular lamp unit configured as described above combines light distribution from a plurality of lamp units to form an entire light distribution pattern. This is achieved by a vehicular lamp characterized by being used.

  According to the vehicular lamp having the above-described configuration, when the light distribution from a plurality of lamp units is combined to form the entire light distribution pattern, the additional reflector of the lamp unit having the highest concentration is shielded or dimmed / reflected. By forming the light-absorbing region, it is possible to efficiently form a dimming region by restricting the maximum luminous intensity at a part below the cutoff line.

  According to the vehicular lamp unit according to the present invention, a part of the reflected light from the reflector is reflected on the upper surface of the additional reflector, and even if the amount of light on the lower side of the cut-off line is increased as a whole, Since a part of the reflected light from the reflector and a part of the reflected light from the upper surface are shielded by the shielding part, a dimming area can be formed in a part below the cutoff line, and the cutoff line on the opposite lane side The lower part can be smoothly dimmed

Hereinafter, preferred embodiments of a vehicle lamp unit and a vehicle lamp according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a horizontal sectional view of a vehicular lamp according to an embodiment of the present invention.
A vehicular lamp 100 according to the present embodiment is a low-beam headlamp, and a lamp unit (for vehicular use) having a high concentration degree is provided in a lamp chamber formed by a transparent light-transmitting cover 11 and a lamp body 13. A configuration in which a plurality of (three in this embodiment) lamp units each including a lamp unit) 20, an intermediate lamp unit 30 having a lower light collection degree, and a diffusion lamp unit 40 having a lower light collection degree are accommodated side by side. It has become.

  These lamp units 20, 30, and 40 are all arranged such that the optical axis Ax extends in the vehicle front-rear direction. The optical axis Ax of each of these lamp units 20, 30, 40 extends in the downward direction by about 0.5 to 0.6 ° with respect to the horizontal direction.

  As will be described later, the lamp unit 20 forms a hot zone forming pattern having horizontal and oblique cut-off lines at the upper end edge. The intermediate lamp unit 30 forms an intermediate zone formation pattern larger than the hot zone formation pattern below the cutoff line. The diffusion lamp unit 40 overlaps the hot zone formation pattern and the intermediate zone formation pattern below the cut-off line, and forms a diffusion zone formation pattern that is wider than the intermediate zone formation pattern.

  That is, the low beam light distribution pattern by the vehicle lamp 100 is formed as a combined light distribution pattern of the hot zone formation pattern, the intermediate zone formation pattern, and the diffusion zone formation pattern by the three lamp units 20, 30, and 40. It has become.

  These lamp units 20, 30, and 40 functioning as a low beam light distribution pattern forming unit are configured as a projector-type lamp unit including a light source and a projection lens provided on the front side thereof, as will be described later. .

Hereinafter, a specific configuration of each lamp unit 20, 30, 40 will be described.
First, the configuration of the lamp unit 20 will be described.
2 is a view taken in the direction of arrows II-II in FIG. 1, and FIG. 3 is a longitudinal sectional view for explaining the basic structure of the lamp unit shown in FIG.
As shown in FIG. 2, the lamp unit 20 of the present embodiment includes an LED (light emitting diode) 25 as a light source, a reflector 27, an additional reflector 29, and an additional reflector 31 for overhead sign (hereinafter abbreviated as OHS). And a projection lens 35. The lamp unit 20 is supported by the lamp body 13 via a frame (not shown), and this frame is supported by the lamp body 13 via an aiming mechanism (not shown).

  The LED 25 is a white light emitting diode having a single light emitting chip 25 a having a size of about 1 mm square, for example, and is disposed behind the rear focal point F of the projection lens 35 and supported by the substrate 33. Thus, it is arranged on the optical axis Ax upward in the vertical direction.

The reflector 27 is a substantially dome-shaped member provided on the upper side of the LED 25, and has a reflection surface 27a that condenses and reflects the light from the LED 25 toward the optical axis Ax toward the front.
The reflecting surface 27a is formed in a substantially elliptical spherical shape with the optical axis Ax as the central axis. Specifically, the reflecting surface 27a is set to have a substantially elliptical cross-sectional shape including the optical axis Ax, and the eccentricity is set to gradually increase from the vertical cross section toward the horizontal cross section. .

  However, the rear apex of the ellipse forming each cross section is set at the same position, and the LED 25 is disposed at the first focal point of the ellipse forming the vertical cross section of the reflecting surface 27a. Thereby, the reflecting surface 27a condenses and reflects the light from the LED 25 toward the optical axis Ax toward the front, and at that time, substantially converges to the second focal point of the ellipse in the vertical section including the optical axis Ax. It is like that.

  The projection lens 35 is a plano-convex lens having a convex front surface and a flat rear surface. As shown in FIG. 3, the projection lens 35 is disposed on the optical axis Ax so that the rear focal point F is positioned at the second focal point of the reflecting surface 27a of the reflector 27, and thereby the rear focal point. An image on the focal plane including F is projected forward as an inverted image.

4 is a plan view of the vehicular lamp unit shown in FIG. 2, and FIG. 5 is a perspective view of the additional reflector shown in FIG.
In the case of this embodiment, the additional reflector 29 has a block (lumb) shape that also serves as a support frame for the projection lens 35 and the reflector 27, and is disposed between the projection lens 35 and the LED 25.
The additional reflector 29 has a front end edge 29c positioned near the rear focal point F of the projection lens 35 to block a part of the reflected light from the reflector 27, thereby forming a cut-off line of the light distribution pattern. An upper surface 29a extending rearward from the edge 29c reflects part of the reflected light from the reflector 27 upward. On the upper surface 29a, a light control surface 36 subjected to a reflection surface treatment is formed.

  That is, the additional reflector 29 reflects a part of the reflected light from the reflector 27 upward on the light control surface 36, so that most of the light to be emitted upward from the projection lens 35 is emitted from the projection lens 35. Control is performed to convert light emitted downward, thereby increasing the luminous flux utilization factor of light emitted from the LED 25.

  Specifically, the light control surface 36 includes a horizontal cut-off forming surface 37a extending horizontally from the substantially optical axis Ax to the vehicle right direction (left direction in FIG. 5), and the left direction from the approximately optical axis Ax (in FIG. 5). A diagonal cut-off forming surface 39 extending diagonally upward 15 ° in the right direction) and a horizontal cut-off forming surface 37c extending horizontally from the diagonal cut-off forming surface 39 in the left direction (right direction in FIG. 5). A ridge line 29c (that is, a ridge line between the light control surface 36 and the front end surface 29b of the additional reflector 29) is formed so as to pass through the rear focal point F of the projection lens 35.

  Of the light emitted from the LED 25, a part of the light reflected by the reflecting surface 27 a of the reflector 27 enters the light control surface 36 of the additional reflector 29, and the rest enters the projection lens 35 as it is. At this time, the light incident on the light control surface 36 is reflected upward by the light control surface 36 to enter the projection lens 35, and is emitted from the projection lens 35 as downward light.

  Note that the front end edge 29c of the additional reflector 29 is formed in a curved shape in which both the left and right sides protrude forward in plan view so as to correspond to the curvature of field of the projection lens 35. The curved front end edge 29 c coincides with the focal group of the projection lens 35. That is, the front end edge 29c of the additional reflector 29 is formed along the focal point group of the projection lens 35, and the shape of the front end edge 29c is a cut-off line shape as it is.

Further, as shown in FIG. 5, bosses 43, 43 for attaching the OHS additional reflector 31 are provided on the front portion of the upper surface 29 a of the additional reflector 29 so as to protrude left and right.
The additional reflector 31 for OHS is a strip-shaped plate member that opens a space 45 (see FIG. 2) between the additional reflector 29 and crosses the vicinity of the optical axis Ax in the vehicle width direction, and has an upper surface 31a (see FIG. 4). However, the reflection surface reflects the reflected light from the reflector 27 toward the projection lens 35.

  The additional reflector 31 for OHS is positioned with respect to the additional reflector 29 by fitting mounting holes 31b formed at both ends thereof to the boss 43 of the additional reflector 29. As shown in FIG. 4, the OHS additional reflector 31 according to the present embodiment has a convex outline in a top view curved toward the front end edge 29 c of the additional reflector 29.

  In the lamp unit 20, among the light reflected by the reflector 27 and traveling toward the projection lens 35, the light reflected by the OHS additional reflector 31 enters the projection lens 35 and is emitted as upward irradiation light. Then, the upward irradiation light becomes OHS irradiation light for irradiating OHS, and forms a light distribution pattern for OHS irradiation, which will be described later, above the low beam light distribution pattern. Thereby, the favorable visibility with respect to OHS is ensured.

  By the way, in the lamp unit 20, there may be a demand for forming a dimming region having a lower luminous intensity than the surrounding area in a part of the light distribution pattern by the OHS irradiation light due to anti-glare measures or legal regulations of oncoming vehicles. . In the present embodiment, the illuminance lowering means 47 is provided on the upper surface 31 a that is the reflective surface of the OHS additional reflector 31. Thereby, in the irradiation area reflected by the illuminance lowering means 47, the amount of emitted light is reduced as compared with the surrounding area, and a dark part having lower illuminance than the surrounding area is formed.

  6 is an enlarged view of the vicinity of the shield shown in FIG. 5, FIG. 7 is a front view of the vicinity of the shield, FIG. 8 is a view taken along arrows VIII-VIII of FIG. 7, and FIG. FIG. 10 is a perspective view of a low beam light distribution pattern formed on a virtual vertical screen arranged at a position 25 m ahead of the lamp by light irradiation from the vehicular lamp unit shown in FIG. FIG. 11 is a longitudinal sectional view of the main part of the reflector and the additional reflector showing the positional relationship between the virtual straight line and the height of the shielding part.

  As shown in FIGS. 5 and 6, the additional reflector 29 has a shielding portion 49 in the vicinity of the front edge 29c on the upper surface 29a. The shielding part 49 is formed so as to protrude upward from the upper surface 29a, and acts to shield part of the reflected light from the reflector 27 and part of the reflected light from the upper surface 29a, as shown in FIG. .

  In the lamp unit 20, a part of the reflected light from the reflector 27 is reflected by the upper surface 29 a of the additional reflector 29, and the light that should be emitted upward from the projection lens 35 becomes light that is emitted downward from the projection lens 35. The light flux utilization factor of the light emitted from the LED 25 is increased.

  That is, the amount of light below the cut-off line CL is increased overall. Thus, even when the amount of light below the cut-off line CL is increased as a whole, a part of the reflected light from the reflector 27 and a part of the reflected light from the upper surface 29a are shielded by the shielding part 49. As a result, as shown in FIG. 10, a dimming region 51 is formed in a part below the cutoff line CL1 on the opposite lane side.

  The hot zone formation pattern HZ by the lamp unit 20 is a right-hand traffic light distribution pattern having a cut-off line CL1 on the opposite lane side and a cut-off line CL2 on the own lane side, and an oblique cut-off line CL3. The position of the elbow point E, which is the intersection of both cut-off lines CL1, CL3, is set to a position about 0.5 to 0.6 ° below HV, which is the vanishing point in the front direction of the lamp.

  In FIG. 10, MZ represents an intermediate zone formation pattern formed by the lamp unit 30 below the cut-off line CL and larger than the hot zone formation pattern HZ. WZ represents a diffusion zone formation pattern that is formed by the lamp unit 40 so as to overlap with the intermediate zone formation pattern MZ, and is further spread laterally than the intermediate zone formation pattern MZ.

  In FIG. 10, OHSZ represents an OHS light distribution pattern formed above the low beam light distribution pattern PL, and 57 represents an OHS light reduction region. These hot zone formation pattern HZ, intermediate zone formation pattern MZ, and diffusion zone formation pattern WZ are superimposed as shown in the figure to form the low beam light distribution pattern PL of the vehicle lamp 100 as a combined light distribution pattern. ing.

As shown in FIG. 6, the shielding portion 49 of the present embodiment includes a first inclined portion 53 that is inclined upward from the front edge 29c of the upper surface 29a toward the rear, and a side from the optical axis Ax side of the upper surface 29a. It forms in the convex shape which has the 2nd inclination part 55 which inclines upward toward the direction.
In the shielding part 49, the first inclined part 53 and the second inclined part 55 are formed so that the reflected light blocked by the shielding part 49 gradually toward the tip of the shielding part 49 and the side on the optical axis Ax side. Less. Therefore, it is possible to prevent the dimming area 51 from being suddenly darkened, and to smoothly diminish a part from directly below the cutoff line CL1 on the opposite lane without causing the driver to feel uncomfortable.

Here, as shown in FIG. 11, the shielding part 49 is formed in a convex shape having a height H that does not exceed the imaginary straight line 61 connecting the upper end of the effective reflecting surface 59 and the front end edge 29c in the reflecting surface 27a of the reflector 27. Has been.
Thus, since the height of the shielding part 49 is a height H that does not exceed the virtual straight line 61, the reflected light from the upper end of the effective reflecting surface 59 in the reflecting surface 27a of the reflector 27 is not blocked at all. The cut-off line CL1 on the opposite lane side is not destroyed. Therefore, while maintaining the cut-off line CL, the dimming region 51 can be formed in a part below the cut-off line CL1 on the opposite lane side.

Next, the lamp units 30 and 40 will be described.
As shown in FIG. 1, the lamp units 30 and 40 include a light emitting diode (not shown) as a light source, reflectors 61 and 63, and projection lenses 65 and 67. The light emitting diode has the same configuration as that of the LED 25 of the lamp unit 20, and is arranged upward in the vertical direction on the optical axis Ax.

  The reflectors 61 and 63 are substantially dome-shaped members provided on the upper side of the light emitting diode. The reflector 61 has a reflection surface that condenses and reflects light from the light-emitting diode forward with a lower light collection degree than the reflection surface 27a of the reflector 27. Further, the reflector 63 has a diffuse reflection surface having a lower light collection degree than the reflection surface of the reflector 61.

  The projection lenses 65 and 67 are plano-convex lenses having a convex front surface and a flat rear surface. These projection lenses 65 and 67 are disposed on the optical axis Ax so that the rear focal points thereof are located at the focal points of the reflecting surfaces of the reflectors 61 and 63, respectively, and thereby on the focal plane including the rear focal point. The image is projected forward as a reverse image.

  As shown in FIG. 10, the intermediate zone formation pattern MZ formed by the lamp unit 30 extends to the left and right sides below the cut-off line CL with respect to the VV line that is a vertical line passing through HV. It is formed. In addition, the diffusion zone formation pattern WZ formed by the lamp unit 40 is formed so as to spread more widely on the left and right sides with respect to the VV line, which is a vertical line passing through HV, below the cut-off line CL. Thus, the road surface in front of the vehicle is irradiated over a wide range.

  Therefore, according to the vehicle lamp unit 20 of the present embodiment, a part of the reflected light from the reflector 27 is reflected by the upper surface 29a of the additional reflector 29, and the light to be emitted upward from the projection lens 35 is projected. Even if the light amount on the lower side of the cut-off line CL is increased by converting the light emitted downward from the lens 35 and increasing the luminous flux utilization factor of the light emitted from the LED 25, the reflector 27. Since a part of the reflected light from the light and a part of the reflected light from the upper surface 29a are shielded by the shielding part 49, the dimming region 51 can be formed in a part below the cutoff line CL1 on the opposite lane side. .

Further, according to the vehicle lamp 100 of the present embodiment, the vehicle lamp unit 20 includes the hot zone formation pattern HZ that is a high luminous intensity region, the intermediate zone formation pattern MZ that is a medium luminous intensity region, and the diffusion that is a diffusion region. Used as the lamp unit 20 having the highest light concentration in the vehicular lamp 100 that combines the light distribution from the plurality of lamp units 20, 30, 40 forming the zone formation pattern WZ to form the entire light distribution pattern PL. ing.
That is, by forming the shielding portion 49 on the additional reflector 29 of the lamp unit 20 having the highest light concentration, the dimming region 51 is efficiently formed by restricting the maximum light intensity at a part below the cutoff line CL1 on the opposite lane side. can do.

Next, a modification of the lamp unit according to the above embodiment will be described.
FIG. 12 is a perspective view of an additional reflector according to a modification in which a dimming reflection part is formed, and FIG. 13 is an enlarged view of a main part of FIG.

In the lamp unit according to this modification, a dimming reflection portion 71 is disposed in the vicinity of the front edge 29 c on the upper surface 29 a of the additional reflector 29.
The dimming / reflecting unit 71 attenuates and reflects part of the reflected light from the reflector 27. The position where the dimming reflection part 71 is provided is the same as the position where the shielding part 49 described above is provided.

  The dimming / reflecting portion 71 of the present embodiment is formed by performing knurling on a corresponding portion of the upper surface 29a. However, the dimming / reflecting part of the present invention may be formed by applying a texture or the like, or may be formed by applying a coating or the like on a mirror-finished surface such as a vapor-deposited surface. Good.

  According to the lamp unit according to this modification, a part of the reflected light from the reflector 27 is reflected by the upper surface 29a of the additional reflector 29, and the amount of light below the cutoff line CL is increased as a whole. However, since a part of the reflected light from the upper surface 29a is attenuated by the dimming / reflecting portion 71, the dimming region 51 can be formed in a part below the cutoff line CL1 on the opposite lane side. Further, the dimming / reflecting portion 71 can be formed relatively easily by performing a surface treatment or the like as compared with the configuration in which the shielding portion 49 is provided.

The vehicle lamp unit and the vehicle lamp of the present invention are not limited to the configuration of the above-described embodiment, and it goes without saying that various forms can be taken based on the gist thereof. .
For example, the vehicular lamp 100 of the above embodiment has a configuration in which a plurality of lamp units are accommodated side by side in the lamp chamber, but the present invention is not limited to this, and is configured by a single lamp unit. Also good. Further, the light source is not limited to the light emitting diode, and a discharge bulb such as a metal halide bulb or a halogen bulb may be used.

It is a horizontal sectional view of the vehicular lamp concerning one embodiment of the present invention. It is an II-II arrow line view of FIG. It is a longitudinal cross-sectional view explaining the basic composition of the lamp unit shown in FIG. It is a top view of the vehicle lamp unit shown in FIG. It is a perspective view of the additional reflector shown in FIG. FIG. 6 is an enlarged view of the vicinity of the shielding unit illustrated in FIG. 5. It is a front view of the shielding part vicinity. It is a VIII-VIII arrow line view of FIG. It is a longitudinal cross-sectional view explaining the effect | action of the vehicle lamp unit which concerns on this invention. FIG. 10 is a view perspectively showing a low beam light distribution pattern formed on a virtual vertical screen arranged at a position 25 m ahead of the lamp by light irradiation from the vehicle lamp unit shown in FIG. 9. It is the principal part longitudinal cross-sectional view of the reflector and additional reflector showing the positional relationship of a virtual straight line and the height of a shielding part. It is a perspective view of the addition reflector by the modification in which the light reduction reflection part was formed. FIG. 13 is an enlarged view of the vicinity of the light reduction reflecting portion shown in FIG. 12.

Explanation of symbols

20. Lamp unit (vehicle lamp unit)
25 ... LED (light source)
DESCRIPTION OF SYMBOLS 27 ... Reflector 29 ... Additional reflector 29a ... Upper surface 29c ... Front end edge 35 ... Projection lens 36 ... Light control surface 49 ... Light-shielding part 53 ... 1st inclination part 55 ... 2nd inclination part 59 ... Effective reflection surface 61 ... Virtual straight line 100 ... Vehicle lamp Ax ... Optical axis CL ... Cut-off line CL1 ... Cut-off line on opposite lane F: Rear focus

Claims (5)

A projection lens disposed on an optical axis extending in the vehicle longitudinal direction;
A light source disposed behind the rear focal point of the projection lens;
A reflector that reflects direct light from the light source forward and toward the optical axis;
It is arranged between the projection lens and the light source, and the front end edge thereof is located in the vicinity of the rear focal point of the projection lens so that a part of the reflected light from the reflector is shielded to cut off the light distribution pattern cut-off line. And an additional reflector whose upper surface extending backward from the front edge reflects a part of the reflected light from the reflector upward,
A shielding part that is disposed in the vicinity of the front edge of the upper surface of the additional reflector and shields part of the reflected light from the reflector and part of the reflected light from the upper surface;
A vehicular lamp unit comprising:   2. The vehicular lamp unit according to claim 1, wherein the shielding portion is formed in a convex shape having a height not exceeding a virtual straight line connecting an upper end of an effective reflection surface of the reflector and the front end edge. .   A first inclined portion that inclines upward from the front edge side of the upper surface toward the rear, and a second inclined portion that inclines upward from the optical axis side to the side of the upper surface; The vehicular lamp unit according to claim 1, wherein the vehicular lamp unit is formed in a convex shape. A projection lens disposed on an optical axis extending in the vehicle longitudinal direction;
A light source disposed behind the rear focal point of the projection lens;
A reflector that reflects direct light from the light source forward and toward the optical axis;
It is arranged between the projection lens and the light source, and the front end edge thereof is located in the vicinity of the rear focal point of the projection lens so that a part of the reflected light from the reflector is shielded to cut off the light distribution pattern cut-off line. And an additional reflector whose upper surface extending backward from the front edge reflects a part of the reflected light from the reflector upward,
A dimming / reflecting part that is disposed near the front edge of the upper surface of the additional reflector and that attenuates and reflects a portion of the reflected light from the reflector;
A vehicular lamp unit comprising:   The lamp unit for a vehicle according to any one of claims 1 to 4, wherein the vehicular lamp unit has the highest light concentration in a vehicular lamp in which light distribution from a plurality of lamp units is combined to form an entire light distribution pattern. A vehicular lamp characterized by being used as a unit.

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