JP4823788B2 - Vehicle headlamp - Google Patents

Description

  The present invention relates to a so-called projector-type vehicular headlamp, and in particular, forms a dark part having a lower illuminance than the surroundings by a second shade at a specific position in a light distribution pattern formed by the first shade. The present invention relates to a vehicle headlamp.

  Generally, a projector-type vehicle headlamp reflects light from a light source disposed on an optical axis extending in the vehicle longitudinal direction toward the front by a reflector toward the optical axis, and this reflected light is directed to the front of the reflector. It is configured to irradiate the front of the lamp through the provided projection lens.

  When the projector-type vehicle headlamp is configured for low beam irradiation, a part of the reflected light from the reflector is shielded between the projection lens and the reflector to remove the upward irradiation light. By providing the shade, beam irradiation is performed forward with a low beam light distribution pattern having a predetermined cutoff line.

  By the way, among the irradiation areas below the cut-off line formed by the first shade, the irradiation area toward the oncoming vehicle has a point that causes glare to the oncoming vehicle when the illuminance is too high. Therefore, a second shade that shields part of the reflected light from the reflector is added in front of the rear focal point of the projection lens, and the second shade provides a glare to such an oncoming vehicle. There has been proposed a vehicular headlamp that is formed in a dark part lower than the surroundings (see, for example, Patent Document 1).

JP 2003-178613 A

By the way, normally, in the case of a projector-type vehicle headlamp for low beam irradiation, a part of the light reflected by the lower half of the reflector (the range below the optical axis) is shielded by the first shade. That is, the light reflected by the reflector and incident on the projection lens is more light reflected by the upper half of the reflector than light reflected by the lower half of the reflector.
Therefore, as described in Patent Document 1, in the vehicle headlamp in which the second shade is arranged in front of the rear side focal point of the projection lens, the second shade reflects strong light reflected by the upper half of the reflector. A dark part is formed by shielding, and the dark part formed on the light distribution pattern by the second shade has a possibility that the illuminance is too much lower than the surroundings, causing a sense of incongruity in visual recognition.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problems, and provide a favorable vehicle headlamp that can prevent glare from occurring on an oncoming vehicle and that does not cause a sense of incongruity in visual recognition. That is.

The above object of the present invention is to provide a lamp chamber formed of a lamp body and a cover,
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;
Arranged between the projection lens and the light source, the upper edge of the projection lens is located in the vicinity of the rear focal point of the projection lens to shield part of the reflected light from the reflector and part of the direct light from the light source. A first shade that forms a cut-off line of the light distribution pattern by:
The first shade is disposed between the reflector and the upper edge thereof is located in the vicinity of the optical axis so that a part of the reflected light of the reflector is shielded, so that illuminance is generated at the corresponding position of the light distribution pattern. A second shade forming a lower dark part,
It is achieved by a vehicle headlamp characterized by comprising:

  According to the vehicle headlamp having the above-described configuration, the second shade forms a dark part having lower illuminance than the surroundings in the irradiation area below the cutoff line formed by the first shade. Then, by appropriately selecting the position where the second shade forms the dark part, in the light distribution pattern for low beam irradiation, the point that becomes glare to the oncoming vehicle is formed in the dark part where the illuminance is lower than the surrounding, Generation of glare on the car can be prevented.

Moreover, the second shade is disposed between the first shade and the reflector, and shields light reflected by the lower half of the reflector. Therefore, when compared with a conventional vehicular headlamp in which light reflected by the upper half of the reflector having a large amount of reflected light is shielded by a second shade arranged in front of the rear focus of the projection lens, the second The dark part formed by the shade to prevent glare is not a drastic decrease in illuminance from the surroundings, but a gradual and faint dark part in which the illuminance from the surroundings gradually decreases.
Therefore, the dark part formed by the second shade for preventing glare does not cause a sense of incongruity in visual recognition, and good visibility can be ensured also on the oncoming lane.

In the vehicle headlamp configured as described above, an overhead sign reflecting surface that is provided above the light source and reflects light from the light source;
An overhead sign light receiving surface that is provided in front of the first shade, reflects light from the overhead sign reflecting surface toward the projection lens, and emits upward irradiation light from the projection lens; And
The second shade is formed by a cut-and-raised piece that is cut and raised upward so that the front end portion is located near the upper end edge of the first shade,
The upper surface of the inclined plate portion extending obliquely downward on the front side from the upper end of the connecting plate portion fixed to the front surface side of the first shade so that the overhead sign light-receiving surface covers the opening portion where the cut and raised pieces are cut and raised It is desirable to be formed.

According to the vehicle headlamp having such a configuration, the light distribution for irradiating the overhead sign (OHS) is added to the light distribution pattern for low beam irradiation by the light emitted from the light receiving surface for overhead sign to the projection lens. The visibility for overhead signs can be improved.
Further, since the second shade is integrally formed with the first shade by cutting and raising a part of the lower portion of the first shade upward, the equipment of the second shade increases the number of parts and the number of assembly steps. Nor.

  And since the opening part formed in the lower part of the 1st shade for cutting up and raising the 2nd shade is closed by the connecting plate part joined to the 1st shade in order to form the light receiving surface for overhead signs, The light reflected by the lower half of the reflector and directed to the opening portion for cutting and raising the second shade is shielded by the connecting plate portion, and is prevented from entering the projection lens as upward light that causes glare.

Further, in the vehicle headlamp configured as described above, an overhead sign reflecting surface that is provided below the light source and reflects light from the light source;
An overhead sign opening provided near the upper edge of the first shade;
A third shade that is provided above the overhead sign opening on the rear surface of the first shade and shields light from other than the overhead sign reflecting surface toward the overhead sign opening;
The second shade is preferably provided on the upper surface of the third shade.

  According to the vehicle headlamp configured as described above, the light reflected by the overhead sign reflecting surface and transmitted through the overhead sign opening formed in the first shade is above the light distribution pattern for low beam irradiation. The light distribution for irradiating the overhead sign is added, and the visibility for the overhead sign can be improved.

In addition, since light traveling from other than the overhead sign reflecting surface to the overhead sign opening is shielded by the third shade, it is emitted as overhead sign irradiation light by appropriately setting the dimensions of the overhead sign reflecting surface. The amount of light to be set can be set appropriately.
In addition, as a countermeasure against glare on the oncoming vehicle, the second shade that forms a dark portion with lower illuminance than the surroundings is provided on the third shade, so that the second shade and the third shade are provided independently. In comparison, an increase in the number of parts and the number of assembly processes can be prevented.

In the vehicle headlamp having the above-described configuration, it is preferable that the second shade is formed by a cut and raised piece cut and raised in the third shade.
According to the vehicle headlamp having such a configuration, the second shade can be formed integrally with the third shade by press molding or the like, and the second shade and the third shade are provided as separate parts. In comparison, the number of parts and the number of assembly processes can be reduced.

In the vehicular headlamp configured as described above, it is desirable that the second shade is disposed obliquely with respect to the optical axis.
According to the vehicle headlamp having such a configuration, the shielding performance at the corner on the light source side at the tip of the second shade is reduced as compared with the case where the second shade is arranged perpendicular to the optical axis. The As a result, it is possible to blur a decrease in illuminance at the contour portion of the dark portion formed by the second shade, and to form a dark portion without further discomfort.

  According to the vehicle headlamp according to the present invention, by appropriately selecting the position where the second shade forms the dark portion, the point that becomes glare to the oncoming vehicle in the light distribution pattern for low beam irradiation is from the surroundings. Can be formed in a dark part where the illuminance is lowered, and glare can be prevented from occurring on the oncoming vehicle.

Moreover, the second shade is disposed between the first shade and the reflector, and shields light reflected by the lower half of the reflector. For this reason, the dark portion formed by the second shade for preventing glare is not a drastic decrease in illuminance from the surroundings, but is a faint dark portion in which the illuminance from the surroundings gradually decreases.
Therefore, the dark part formed by the second shade for preventing glare does not cause a sense of incongruity in visual recognition, and good visibility can be ensured also on the oncoming lane.

Hereinafter, a preferred embodiment of a vehicle headlamp according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a vehicle headlamp according to a first embodiment of the present invention, FIG. 2 is an operation explanatory view of the lamp unit of the vehicle headlamp shown in FIG. 1, and FIG. FIG. 4 is an enlarged view of the driving beam arrangement formed on a virtual vertical screen installed at a position 25 m ahead of the lamp by light irradiated forward from the lamp unit of the vehicle headlamp shown in FIG. It is a figure which shows a light pattern transparently.

As shown in FIG. 1, a vehicle headlamp 30 according to this embodiment includes a lamp body 33 and a lamp chamber 33 formed by a transparent transparent cover (cover) 32 attached to the front opening thereof. A projector-type lamp unit 35 is accommodated.
The lamp unit 35 is supported by the lamp body 31 via the aiming mechanism 40. The aiming mechanism 40 is a mechanism for finely adjusting the mounting position and the mounting angle of the lamp unit 35. At the stage of adjusting the aiming, the lens central axis (optical axis) Ax of the lamp unit 35 is 0 with respect to the vehicle longitudinal direction. It extends in the downward direction about 5 to 0.6 degrees.

  As shown in FIGS. 1 and 2, the lamp unit 35 is disposed behind the projection lens 18 disposed on the optical axis Ax extending in the vehicle front-rear direction and the rear focal point F2 of the projection lens 18. The light source 12a, the reflector 34 that reflects the direct light from the light source 12a forward and toward the optical axis Ax, the first shade 41 disposed between the projection lens 18 and the light source 12a, and the first shade 41, the second shade 43 arranged between the reflector 34, the overhead sign reflecting surface 45 provided above the light source 12a by extending the upper end edge side of the reflector 34, and the front of the first shade 41. And an overhead sign light-receiving surface 47 provided.

The light source 12 a is a light emitting part (filament) of the light source bulb 12. The light source bulb 12 is a so-called H7 halogen bulb, and the center of the light source 12a and the center of the reflector 34 are in the vehicle front-rear direction (more precisely, the downward direction is about 0.5 to 0.6 ° with respect to the vehicle front-rear direction). It is attached to the reflector 34 so as to be arranged substantially coaxially with the extending optical axis Ax.
As the light source bulb, a discharge bulb or the like can be used instead of the above-described halogen bulb, and an LED or the like can be adopted as the light source.

The reflector 34 has a substantially ellipsoidal reflecting surface 34a with the optical axis Ax as the central axis. The reflecting surface 34a is a vertical section including the optical axis Ax, and is formed in an elliptical shape in which the position of the light source 12a is the first focal point F1, and the rear focal point F2 of the projection lens 18 is the second focal point.
As a result, the reflecting surface 34a reflects light from the light source 12a toward the front toward the optical axis Ax, and at this time, the second focal point of the ellipse in the vertical section including the optical axis Ax. Is substantially converged to the rear focal point F2.

  The projection lens 18 is coupled to the front end of the reflector 34 via a holder 36. The holder 36 is formed in a cylindrical shape extending forward from the front end opening of the reflector 34, and is screwed and fixed to the reflector 34 at a plurality of locations at the rear end.

The projection lens 18 is fixedly supported at the front end portion of the holder 36. The projection lens 18 is a plano-convex lens having a convex front surface and a flat rear surface, and is disposed so that its rear focal point F2 substantially coincides with the second focal point of the reflecting surface 34a of the reflector 34.
As a result, the projection lens 18 transmits the reflected light from the reflecting surface 34a of the reflector 34 so as to be condensed toward the optical axis Ax.

  As shown in FIG. 2, the first shade 41 is disposed between the projection lens 18 and the light source 12a, and its upper edge 41a is positioned near the rear focal point F2 of the projection lens 18 so as to be from the reflector 34. By shielding a part of the reflected light and a part of the direct light from the light source 12a, the upward irradiation light emitted from the projection lens 18 is removed, and thereby the low beam is irradiated downward with respect to the optical axis Ax. Irradiation light is obtained. By the shielding of the first shade 41, a cut-off line CL of the light distribution pattern P for low beam irradiation shown in FIG. 4 is formed.

In the case of the present embodiment, the first shade 41 is made of a metal plate, and as shown in FIGS. 1 and 2, the outer peripheral edge portion 41 b is sandwiched by the fastening portion between the holder 36 and the reflector 34, and the reflector 34 is positioned and fixed.
As shown in FIG. 2, a plurality of screw insertion holes 41c through which screws 37 for fastening the holder 36 to the reflector 34 are inserted, and positioning pin insertion holes 41d into which the positioning pins 34b of the reflector 34 are inserted, are formed in the outer peripheral edge portion 41b. The first shade 41 and the reflector 34 are aligned with each other by being fixed to the reflector 34 together with the holder 36.

  As shown in FIG. 2, the second shade 43 is disposed between the first shade 41 and the reflector 34, and its upper edge 43 a is positioned in the vicinity of the optical axis Ax so that one of the reflected light of the reflector 34 is By shielding the part, a dark part Py having a lower illuminance than the surroundings is formed at a corresponding position in the light distribution pattern P for low beam irradiation.

The second shade 43 is formed by a cut-and-raised piece 41 f that is cut and raised upward from the first shade 41 so that a tip portion that becomes the upper edge 43 a is positioned in the vicinity of the upper edge of the first shade 41.
Further, the second shade 43 is disposed obliquely with respect to the optical axis Ax (inclination angle θ shown in FIG. 3).

  The overhead sign reflecting surface 45 is provided above the light source 12a by extending the reflecting surface on the upper edge side of the reflector 34. As shown in FIG. 2, the light from the light source 12a is forward of the rear focal point F2. Reflected near the optical axis Ax.

  As shown in FIG. 2, the overhead sign light-receiving surface 47 is provided in front of the first shade 41, reflects the light b <b> 1 from the overhead sign reflection surface 45 toward the projection lens 18, and from the projection lens 18. The upward irradiation light (overhead sign irradiation light) Bo is emitted.

  As shown in FIG. 4, the overhead sign irradiation light Bo emitted from the projection lens 18 illuminates the light distribution pattern for overhead sign irradiation (overhead sign pattern) that illuminates above the horizontal cutoff line CL of the light distribution pattern P for low beam irradiation. ) Form Pohs.

  In the case of this embodiment, the overhead sign light receiving surface 47 covers the front surface of the first shade 41 so as to cover the opening 41g on the first shade 41 where the cut and raised pieces 41f for forming the second shade 43 are cut and raised. It is formed on the upper surface of an inclined plate portion 49 extending obliquely downward on the front side from the upper end of the connecting plate portion 48 fixed to the side.

According to the vehicle headlamp 30 of the first embodiment described above, the second shade 43 is a low beam that is an irradiation area below the cut-off line CL formed by the first shade 41, as shown in FIG. A dark portion Py having lower illuminance than the surroundings is formed in the light distribution pattern P for irradiation.
Then, by appropriately selecting the position where the second shade 43 forms the dark part Py, in the light distribution pattern P for low beam irradiation, a point that becomes glare to the oncoming vehicle is formed in the dark part Py where the illuminance is lower than the surroundings. Thus, the occurrence of glare on the oncoming vehicle can be prevented.

In addition, the second shade 43 is disposed between the first shade 41 and the reflector 34, and shields light reflected by the lower half of the reflector 34. Therefore, when compared with a conventional vehicle headlamp in which the light reflected by the upper half of the reflector having a large amount of reflected light is shielded by the second shade arranged in front of the rear focal point F2 of the projection lens, The dark portion Py formed by the two shades 43 for glare prevention is not a drastic decrease in illuminance from the surroundings, but a dark portion Py in which the illuminance from the surroundings gradually decreases.
Accordingly, the dark portion Py formed by the second shade 43 to prevent glare does not cause a sense of incongruity in visual recognition, and good visibility can be secured even on the opposite lane.

  Further, since the second shade 43 is formed integrally with the first shade 41 by cutting and raising a part of the lower portion of the first shade 41, the equipment of the second shade 43 is equipped with the number of parts and the assembly process. It does not increase the number.

  Further, in the vehicle headlamp 30 according to the present embodiment, the second shade 43 is disposed obliquely with respect to the optical axis Ax, and therefore the optical axis as in the second shade 50 illustrated by an imaginary line in FIG. Compared with the case of being arranged perpendicular to Ax, the position of the corner 43b on the light source 12a side at the tip of the second shade 43 is separated from the optical axis Ax.

Thereby, in the second shade 50 arranged vertically, the light b3 shielded in the vicinity of the corner of the tip can be transmitted without being shielded by the second shade 43 arranged obliquely. The shielding performance near the tip of the shade 43 is relaxed.
As a result, it is possible to blur the decrease in illuminance at the contour portion of the dark portion Py formed by the second shade 43, and to form a dark portion Py with no sense of incongruity.

  Further, in the vehicle headlamp 30 according to the present embodiment, the light b1 reflected by the overhead sign reflecting surface 45 is reflected by the overhead sign light receiving surface 47 toward the projection lens 18, whereby the arrangement for low beam irradiation is performed. Since the light distribution pattern Pohs for overhead sign irradiation is added above the horizontal cut-off line CL in the light pattern P, the visibility with respect to the overhead sign can be improved (see FIG. 4).

  Further, in the vehicle headlamp 30 of the present embodiment, the opening 41g formed in the lower portion of the first shade 41 for cutting and raising the second shade 43 is used to form the overhead sign light receiving surface 47. Since it is blocked by the connecting plate portion 48 joined to the first shade 41, the light b2 reflected by the lower half of the reflector 34 and directed to the opening 41g for raising and lowering the second shade 43 as shown in FIG. Is shielded by the connecting plate portion 48 and is prevented from entering the projection lens 18 as upward light that causes glare.

  FIG. 5 is a longitudinal sectional view of a vehicle headlamp according to a second embodiment of the present invention, and FIG. 5 is an operation explanatory view of the lamp unit of the vehicle headlamp shown in FIG. Note that in the vehicle headlamp 51 of the second embodiment, the same reference numerals are given to the same components as those of the vehicle headlamp 30 of the first embodiment, and detailed description thereof is omitted.

As shown in FIG. 5, the vehicle headlamp 51 of the present embodiment has a projector-type in a lamp chamber 33 formed of a lamp body 31 and a transparent transparent cover 32 attached to the front opening thereof. A lamp unit 53 is accommodated.
The lamp unit 53 is supported by the lamp body 31 via the aiming mechanism 40 as in the case of the first embodiment.

  As shown in FIGS. 5 and 6, the lamp unit 53 includes a projection lens 18 disposed on an optical axis Ax extending in the vehicle front-rear direction, and a light source disposed behind the rear focal point F2 of the projection lens 18. 12a, a reflector 54 that reflects the direct light from the light source 12a forward and toward the optical axis Ax, a first shade 55 disposed between the projection lens 18 and the light source 12a, and the first shade 55 A second shade 57 disposed between the first and second reflectors 54, an overhead sign reflecting surface 58 provided below the light source 12a, and an overhead sign opening 59 provided near the upper edge of the first shade 55. It is equipped with.

The reflector 54 has a substantially elliptical spherical reflecting surface 54a with the optical axis Ax as the central axis. The reflecting surface 54a is a vertical section including the optical axis Ax, and is formed in an elliptical shape having the position of the light source 12a as the first focal point F1 and the rear focal point F2 of the projection lens 18 as the second focal point.
As a result, the reflecting surface 54a reflects light from the light source 12a toward the front toward the optical axis Ax. At this time, the second focal point of the ellipse is included in the vertical section including the optical axis Ax. Is substantially converged to the rear focal point F2.

  The projection lens 18 is coupled to the front end of the reflector 54 via the holder 36. The projection lens 18 transmits the reflected light from the reflecting surface 54a of the reflector 54 so as to be condensed near the optical axis Ax.

  As shown in FIG. 6, the first shade 55 is disposed between the projection lens 18 and the light source 12a, and its upper edge 55a is positioned in the vicinity of the rear focal point F2 of the projection lens 18 from the reflector 54. By shielding a part of the reflected light and a part of the direct light from the light source 12a, the upward irradiation light emitted from the projection lens 18 is removed, and thereby the low beam is irradiated downward with respect to the optical axis Ax. Irradiation light is obtained. By the shielding of the first shade 55, a cut-off line CL of the light distribution pattern P for low beam irradiation shown in FIG. 4 is formed.

In the case of this embodiment, the first shade 55 is made of a metal plate, and as shown in FIGS. 5 and 6, the outer peripheral edge portion 55 b is sandwiched between the fastening portions of the holder 36 and the reflector 54, and the reflector is used. 54 is positioned and fixed.
As shown in FIG. 6, a plurality of screw insertion holes 55 c through which screws 37 for fastening the holder 36 to the reflector 54 are inserted, and positioning pin insertion holes 55 d into which the positioning pins 54 b of the reflector 54 are inserted, are formed in the outer peripheral edge 55 b. The first shade 55 and the reflector 34 are aligned with each other by being fixed to the reflector 54 together with the holder 36.

In the case of this embodiment, on the rear surface side of the first shade 55, the overhead sign is extended from the upper side of the overhead sign opening 59 obliquely downward to the rear side in a bowl shape, and the overhead sign other than the overhead sign reflection surface 58 of the reflector 54. A third shade 61 that shields light traveling toward the opening 59 is joined.
The third shade 61 is formed by bending a metal plate, and is integrated with the first shade 55 by spot welding or the like.

The second shade 57 is provided on the upper surface of the third shade 61. More specifically, the second shade 57 of the present embodiment is formed of cut-and-raised pieces 61a cut and raised on the third shade 61 as shown in FIG.
As in the case of the first embodiment, the second shade 57 is disposed obliquely (inclination angle θ) with respect to the optical axis Ax, and its upper edge 57a is located in the vicinity of the optical axis Ax. By blocking a part of the reflected light of the reflector 54, a dark portion Py (see FIG. 4) having lower illuminance than the surroundings is formed at a corresponding position in the light distribution pattern P for low beam irradiation.

The overhead sign reflecting surface 58 is formed by molding a part of the reflecting surface in the lower half of the reflector 54 into a predetermined shape so as to be positioned below the light source 12a.
The overhead sign reflecting surface 58 reflects light from the light source 12 a toward the overhead sign opening 59. The light reflected by the overhead sign reflecting surface 58 and passing through the overhead sign opening 59 is emitted from the projection lens 18 as upward irradiation light (overhead sign irradiation light) Bo.

  As shown in FIG. 4, the overhead sign irradiation light Bo emitted from the projection lens 18 illuminates the light distribution pattern for overhead sign irradiation (overhead sign pattern) that illuminates above the horizontal cutoff line CL of the light distribution pattern P for low beam irradiation. ) Form Pohs.

Also in the case of the vehicle headlamp 51 described above, as shown in FIG. 4, the second shade 57 is a light distribution for low beam irradiation that is an irradiation area below the cut-off line CL formed by the first shade 55. A dark portion Py having lower illuminance than the surroundings is formed in the pattern P.
Then, by appropriately selecting the position where the second shade 57 forms the dark part Py, in the light distribution pattern P for low beam irradiation, the point that becomes glare to the oncoming vehicle is changed to the dark part Py where the illuminance is lower than the surroundings. It is possible to prevent the occurrence of glare on the oncoming vehicle.

In addition, the second shade 57 is disposed between the first shade 55 and the reflector 54, and shields the light reflected by the lower half of the reflector 54. Therefore, when compared with a conventional vehicle headlamp in which the light reflected by the upper half of the reflector having a large amount of reflected light is shielded by the second shade arranged in front of the rear focal point F2 of the projection lens, The dark portion Py formed by the two shades 57 to prevent glare is not a drastic decrease in illuminance from the surroundings, but becomes a dark portion Py in which the illuminance from the surroundings gradually decreases.
Therefore, the dark portion Py formed by the second shade 57 to prevent glare does not cause a sense of incongruity in visual recognition, and good visibility can be ensured on the opposite lane.

  Further, since the second shade 57 is formed by the cut and raised piece 61a cut and raised from the third shade 61, it can be formed integrally with the third shade 61 by press molding or the like, and these second shade 57 and third shade 57 can be formed integrally. Compared with the case where 61 is provided as individual parts, the number of parts and the number of assembly processes can be reduced.

  In the vehicle headlamp 51 of the present embodiment, the light distribution pattern for low beam irradiation is reflected by the light reflected by the overhead sign reflecting surface 58 and transmitted through the overhead sign opening 59 formed in the first shade 55. A light distribution for irradiating an overhead sign is added above P, and the visibility of the overhead sign can be improved.

  In addition, since the light traveling from the portion other than the overhead sign reflecting surface 58 toward the overhead sign opening 59 is shielded by the third shade 61 extending in a bowl shape from the upper side of the overhead sign opening 59 to the lower rear side, the overhead sign. By appropriately setting the size and the like of the reflective surface 58 for use, the amount of light emitted as the overhead sign irradiation light can be set appropriately.

  Further, the second shade 57 and the third shade 61 are provided on the third shade 61 by providing the second shade 57 that forms a dark portion Py having a lower illuminance than the surroundings as a countermeasure against glare to the oncoming vehicle. Compared with the case where it is provided independently, an increase in the number of parts and the number of assembly processes can be prevented.

  The configurations of the projection lens, the light source, the reflector, the first shade, the second shade, and the like in the vehicle headlamp of the present invention are not limited to the configurations of the above-described embodiments, and are based on the spirit of the present invention. It goes without saying that various forms can be adopted.

It is a longitudinal cross-sectional view of the vehicle headlamp which concerns on 1st Embodiment of this invention. It is operation | movement explanatory drawing of the lamp unit of the vehicle headlamp shown in FIG. It is an enlarged view of the B section of FIG. The figure which shows perspectively the light distribution pattern for traveling beams formed on the virtual vertical screen installed in the position of 25 m ahead of a lamp | ramp by the light irradiated ahead from the lamp unit of the vehicle headlamp shown in FIG. It is. It is a longitudinal cross-sectional view of the vehicle headlamp which concerns on 2nd Embodiment of this invention. It is operation | movement explanatory drawing of the lamp unit of the vehicle headlamp shown in FIG.

Explanation of symbols

30 Vehicle headlamp 31 Lamp body 32 Transparent cover (cover)
33 Lamp chamber 34 Reflector 34a Reflecting surface 35 Lamp unit 36 Holder 41 First shade 41a Upper edge 41b Outer peripheral edge 41f Cut and raised piece 43 Second shade 43a Upper edge 45 Overhead sign reflecting surface 47 Overhead sign light receiving surface 48 Connecting plate Part 49 Inclined plate Ax Optical axis

Claims (4)

In the lamp chamber formed by the lamp body and cover,
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;
Arranged between the projection lens and the light source, the upper edge of the projection lens is located in the vicinity of the rear focal point of the projection lens to shield part of the reflected light from the reflector and part of the direct light from the light source. A first shade that forms a cut-off line of the light distribution pattern by:
The first shade is disposed between the reflector and the upper edge thereof is located in the vicinity of the optical axis so that a part of the reflected light of the reflector is shielded, so that illuminance is generated at the corresponding position of the light distribution pattern. A second shade forming a lower dark part,
An overhead sign reflecting surface that is provided above the light source and reflects light from the light source ;
Provided in front of the first shade, and reflects the light from the reflecting surface for overhead sign before Symbol projection lens, and a overhead sign light receiving surface for emitting the upward directed radiated light from the projection lens Prepared,
The second shade is formed by a cut-and-raised piece that is cut and raised upward so that the front end portion is located near the upper end edge of the first shade ,
The overhead sign light receiving surface, the cut-and-raised piece cut and raised the first shades so as to cover the opening from the upper end of the connecting plate portion fixed to the front side inclined plate portion of Ru extends obliquely downward of the front A vehicle headlamp formed on an upper surface.   In the lamp chamber formed by the lamp body and cover,
  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;
  Arranged between the projection lens and the light source, the upper edge of the projection lens is the rear side focus of the projection lens. A part of the reflected light from the reflector and a part of the direct light from the light source located near the point A first shade that forms a cut-off line of the light distribution pattern by shielding;
  It is disposed between the first shade and the reflector, and its upper edge is positioned near the optical axis. The corresponding position of the light distribution pattern by placing and shielding a part of the reflected light of the reflector A second shade that forms a dark portion with lower illuminance than the surroundings,
  Reflection for overhead sign that is provided below the light source and reflects light from the light source Surface,
  An overhead sign opening provided near the upper edge of the first shade;
  Provided above the overhead sign opening on the rear surface of the first shade; Light traveling from other than the overhead sign reflecting surface toward the overhead sign opening A third shade for shielding
  The vehicle front, wherein the second shade is provided on an upper surface of the third shade. Lighting. The vehicle headlamp according to claim 2 , wherein the second shade is formed by a cut-and-raised piece cut and raised by the third shade. The second shade, the vehicle headlamp according to claim 1 or claim 3, characterized in that it is disposed obliquely to the optical axis.

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