JP7266473B2 - lighting unit - Google Patents

Description

The present invention relates to a projector-type lamp unit having a movable shade.

2. Description of the Related Art Conventionally, there has been known a projector-type lighting unit configured to emit light from a light-emitting element toward the front of the unit through a projection lens.

In "Patent Document 1", as a configuration of such a lamp unit, a first position for blocking part of the light from the light emitting element toward the projection lens is provided between the light emitting element and the projection lens. A movable shade configured to be able to adopt a second position for releasing is described.

The lamp unit described in this "Patent Document 1" includes a shade supporting member that rotatably supports the movable shade so that the movable shade can selectively assume a first position and a second position. and the shade support member is supported by a heat sink that supports the light emitting element.

JP 2018-49730 A

In a projector-type lighting unit having such a movable shade, it is possible to form a light distribution pattern having a cutoff line at the top by moving the movable shade to the first position. In order to accurately form the off-line at a predetermined height position, it is essential to ensure sufficient positional accuracy of the upper edge of the movable shade when it is moved to the first position.

However, in the lamp unit described in "Patent Document 1" above, the shade supporting member is arranged to extend along a vertical plane perpendicular to the front-rear direction of the unit and is screwed to the heat sink from the front side of the unit. Since it is fixed, it is not easy to ensure sufficient positional accuracy of the upper edge of the movable shade when it is moved to the first position.

The present invention has been made in view of such circumstances, and in a projector-type lamp unit having a movable shade, a lamp unit is provided at a first position for blocking part of the light from the light-emitting element toward the projection lens. It is an object of the present invention to provide a lamp unit capable of sufficiently ensuring the positional accuracy of the upper edge of a movable shade when moved.

The present invention is intended to achieve the above object by devising the support structure of the shade support member.

That is, the lamp unit according to the present invention is
In a lighting unit configured to irradiate light from a light emitting element toward the front of the unit via a projection lens,
a heat sink supporting the light emitting element; a first position disposed between the light emitting element and the projection lens for blocking part of the light from the light emitting element toward the projection lens; and releasing the light blocking. a movable shade configured to take a second position; and rotatably supporting the movable shade so that the movable shade can selectively take the first position and the second position. a shade support member for
The shade supporting member is placed and fixed on the upper surface of the heat sink.

The above-mentioned "lamp unit" may be configured such that the light emitted from the light source is directly incident on the projection lens, or the light emitted from the light source is passed through other optical members (for example, a reflector, a condenser lens, etc.). It may be configured to be incident on a projection lens.

The above-mentioned "upper surface of the heat sink" means an upward surface, which may be a horizontal surface or a surface inclined with respect to the horizontal surface, but within ±30° with respect to the horizontal direction. is preferably a surface extending in the direction of

The above-mentioned "placed and fixed on the upper surface of the heat sink" means that it is fixed to the heat sink while being placed on the upper surface of the heat sink.

As long as the above-mentioned "shade support member" is mounted and fixed on the upper surface of the heat sink, the specific mounting and fixing position and the mounting and fixing means are not particularly limited. For example, fixing by screwing or caulking can be adopted.

The lighting unit according to the present invention has a structure in which the shade supporting member that supports the movable shade is supported by the heat sink that supports the light emitting element. At this time, the shade supporting member is placed and fixed on the upper surface of the heat sink. Therefore, the following effects can be obtained.

That is, in the state of the shade assembly in which the movable shade is assembled to the shade supporting member, if the positional accuracy of the upper edge of the movable shade in the vertical direction is ensured in advance when the movable shade is moved to the first position, then the Also, the positional accuracy of the upper edge of the movable shade can be maintained even when the shade supporting member is placed and fixed on the upper surface of the heat sink.

As described above, according to the present invention, in a projector-type lighting unit having a movable shade, the upper edge of the movable shade when moved to the first position where part of the light from the light-emitting element directed toward the projection lens is blocked. position accuracy can be sufficiently ensured. Accordingly, when forming a light distribution pattern having a cutoff line in the upper portion, the cutoff line can be formed at a predetermined height position with high accuracy.

In the above configuration, if the shade supporting member is made of a sheet metal member, the weight of the shade supporting member can be reduced, thereby reducing the weight of the lamp unit.

In the case where such a configuration is adopted, the configuration of the shade support member includes a main body portion placed and fixed on the upper surface of the heat sink, an upright wall portion formed to extend upward from the main body portion, and the upright wall portion. and a pair of left and right cut-and-raised pieces formed by cutting and raising a part of the shade upward. If the movable shade is supported by the shade support member by being placed on the piece, the movable shade can be supported with a simple structure.

In this case, if the shade supporting member is configured so that the position of the rotating shaft of the movable shade can be finely adjusted in the vertical direction by the cut-and-raised angle of the pair of left and right cut-and-raised pieces, the following effects can be obtained. Obtainable.

That is, when the movable shade is assembled to the shade support member, the position of the rotation shaft can be finely adjusted in the vertical direction. The shade supporting member can be placed and fixed on the upper surface of the heat sink in a sufficiently secured state in advance.

Further, if the main body of the shade support member is provided with a positioning portion for positioning the shade support member with respect to the heat sink in the direction along the upper surface of the heat sink, the movable shade when it is moved to the first position. The positional accuracy of the upper edge of the can also be improved in the horizontal direction.

Furthermore, in the case where the shade support member is made of a sheet metal member, if the placement and fixation of the shade support member is performed by caulking and fixing by burring caulking, the number of parts of the lamp unit can be increased without increasing the number of parts. The shade support member can be reliably fixed to the heat sink.

In the above configuration, the shade supporting member further includes a reinforcing beam portion which is arranged so as to extend in the left-right direction at a position separated from the main body portion in the front-rear direction of the unit and whose both ends are connected to the main body portion. With this configuration, the following effects can be obtained.

In other words, although the shade support member is made of a sheet metal member, the presence of the reinforcing beam ensures sufficient rigidity of the shade support member, thereby supporting the movable shade with high accuracy. can be done.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional side view showing a vehicle lamp including a lamp unit according to an embodiment of the present invention; Plan view showing the lamp unit Detailed view of part III in Fig. 1 A perspective view showing an exploded shade assembly of the lighting unit. Detailed cross-sectional view of the VV line in FIG. FIG. 3 is a perspective view showing a light distribution pattern formed by the light emitted from the lamp unit; FIG. 6 is a diagram similar to FIG. 5 for explaining the operation of the above embodiment; FIG. 4 is a view similar to FIG. 3, showing a modification of the above embodiment;

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view showing a vehicle lamp 100 including a lamp unit 10 according to one embodiment of the present invention. 2 is a plan view showing the lamp unit 10. FIG.

In FIGS. 1 and 2, the direction indicated by X is the "front of the unit", the direction indicated by Y is the "left direction" ("right direction" when viewed from the front of the unit) orthogonal to the "front of the unit", and indicated by Z. The direction is "up". The same applies to figures other than FIGS.

A vehicle lamp 100 is a headlamp provided at the front end of a vehicle. It is housed in a state in which the optical axis has been adjusted so as to match the longitudinal direction of the vehicle.

The lamp unit 10 includes a projection lens 12, a light emitting element 14 arranged behind the rear focal point F of the projection lens 12, and a light emitting element 14 arranged to cover the light emitting element 14 from above. 14 and a movable shade 22 arranged between the light emitting element 14 and the projection lens 12 .

The projection lens 12 is a plano-convex aspheric lens having a convex front surface and a flat rear surface, and has an optical axis Ax extending in the front-rear direction of the unit. The projection lens 12 projects the light source image formed on the rear focal plane, which is the focal plane including the rear focal point F, as an inverted image onto a virtual vertical screen in front of the lamp.

The projection lens 12 is supported by a lens holder 18 at its outer peripheral flange portion. The lens holder 18 has a pair of left and right arm portions 18a extending rearward of the unit, and is supported by the upper surface 30a of the heat sink 30 at these arm portions 18a.

The light emitting element 14 is a white light emitting diode and has a horizontally long rectangular light emitting surface 14a. The light-emitting element 14 is arranged below the optical axis Ax of the projection lens 12 with the light-emitting surface 14a directed toward the rear side of the unit with respect to the vertically upward direction. At this time, the light emitting element 14 is supported on the upper surface 30 a of the heat sink 30 while being positioned by the light source holder 32 .

The reflector 16 is arranged so as to cover the light emitting element 14 from above, and is supported by the upper surface 30a of the heat sink 30 at its lower edge.

A reflecting surface 16a of the reflector 16 is formed of a substantially ellipsoidal curved surface with the light emission center of the light emitting element 14 as the first focus. The reflecting surface 16a has an elliptical shape whose second focus is a point slightly forward of the rear focal point F in the vertical cross section along the optical axis Ax. It is set to gradually increase toward As a result, the reflector 16 causes the light from the light emitting element 14 to substantially converge on a point slightly forward of the rear focal point F in the vertical plane, and move the convergence position considerably forward in the horizontal plane. It has become.

The movable shade 22 has a rotating shaft 24 extending in the left-right direction (that is, in the vehicle width direction). The movable shade 22 is supported by the shade support member 28 on the upper surface 30a of the heat sink 30 in the state of the shade assembly 20 supported by the shade support member 28. As shown in FIG.

FIG. 3 is a detailed view of part III in FIG.

As shown in FIGS. 2 and 3, the upper surface 30a of the heat sink 30 has a light source support region 30a1 that supports the light emitting element 14 and the light source holder 32, and a reflector support region 30a2 that supports the reflector 16. On the other hand, a lens holder support region 30a3 for supporting the lens holder 18 and a shade assembly support region 30a4 for supporting the shade assembly 20 are formed on horizontal surfaces.

At this time, the reflector support area 30a2 is displaced above the light source support area 30a1, and the lens holder support area 30a3 is displaced above the shade assembly support area 30a4.

FIG. 4 is an exploded perspective view of the shade assembly 20. As shown in FIG.

As shown in FIG. 4, the movable shade 22 includes a shaft portion 22A for fixing and supporting the rotating shaft 24 with the rotating shaft 24 penetrating therethrough, and a shaft portion 22A extending obliquely upward toward the rear of the unit from the shaft portion 22A. It has an extending slope portion 22B, a rear end wall portion 22C extending vertically upward from the rear edge of the slope portion 22B, and a front end wall portion 22D extending vertically downward from the shaft portion 22A.

The rear end wall surface portion 22C is formed so as to curve and extend toward the front side of the unit from the rear focal point F toward both left and right sides in a plan view, and the upper end edge 22Ca is formed so as to extend in the horizontal direction in a stepwise manner. It is

As shown in FIG. 3, the movable shade 22 is driven by an actuator 40 supported by a heat sink 30 to move between a first position indicated by a solid line in the figure and a first position about a rotation axis Ax1 extending in the left-right direction. A second position (a position indicated by a chain double-dashed line in the figure) obtained by rotating the unit rearward by a predetermined angle from position 1 can be adopted.

The actuator 40 has an output shaft 40a projecting toward the front end wall surface portion 22D of the movable shade 22, and is disposed with the output shaft 40a directed obliquely upward toward the front of the unit. The actuator 40 is driven when a beam switching switch (not shown) is operated to reciprocate its output shaft 40a between the position indicated by the solid line and the position indicated by the two-dot chain line in FIG. It's becoming

When the movable shade 22 is at the first position, the upper edge 22Ca of the rear end wall surface portion 22C passes through the rear focal point F of the projection lens 12, so that the light from the light emitting element 14 reflected by the reflector 16 is projected. While part of the light is blocked, when it is moved to the second position, the upper edge 22Ca of the rear end wall surface portion 22C is displaced below the rear focal point F of the projection lens 12 to some extent. The shielding of the light from the light emitting element 14 is released.

The shade supporting member 28 is a member made of sheet metal, and is formed by subjecting a metal plate (for example, a steel plate) to machining such as press molding.

The shade support member 28 includes a body portion 28A, a pair of left and right standing wall portions 28B, a pair of left and right cut-and-raised pieces 28C, and a reinforcing beam portion 28D.

The body portion 28A is formed to extend in the left-right direction along the horizontal plane. The shade support member 28 is placed and fixed on the upper surface 30a of the heat sink 30 (specifically, the shade assembly support region 30a4) at the body portion 28A.

The pair of left and right standing wall portions 28B extend upward (specifically, vertically upward along a vertical plane parallel to the rotation axis Ax1) at both left and right end portions of the main body portion 28A. to) is formed.

The pair of left and right cut-and-raised pieces 28C are formed by upwardly cutting and raising part of the pair of left and right standing wall portions 28B. As shown in FIG. 4, each cut-and-raised piece 28C is formed so as to extend in a substantially L-shape in a side view when the shade support member 28 is a single piece. That is, each cut-and-raised piece 28C has a lower region extending along a horizontal plane flush with the main body portion 28A, and a front region extending along a vertical plane parallel to each standing wall portion 28B.

The reinforcing beam portion 28D is arranged so as to extend in the left-right direction at a position away from the main body portion 28A to the front of the unit, and both ends thereof are connected to the main body portion 28A. At that time, the reinforcing beam portion 28D is formed so as to be positioned between the pair of left and right standing wall portions 28B, and is displaced slightly downward from the main body portion 28A in parallel with the main body portion 28A. formed to extend.

The rotating shaft 24 is press-fitted into the shaft portion 22A of the movable shade 22 from the side. A spring accommodating portion 22Aa for accommodating the torsion coil spring 26 is formed in the shaft portion 22A of the movable shade 22. As shown in FIG.

One end of the torsion coil spring 26 engages the lower surface of the inclined surface 22B of the movable shade 22, while the other end engages the upper surface of the main body 28A of the shade support member 28 (see FIG. 5). As a result, the movable shade 22 is elastically biased toward the first position.

As shown in FIG. 3, the output shaft 40a of the actuator 40 advances against the elastic biasing force of the torsion coil spring 26 from the position indicated by the solid line in the figure to the position indicated by the two-dot chain line, thereby moving the movable shade. 22 is pivoted to move from the first position to the second position.

The movable shade 22 is rotatable with respect to the shade support member 28 by placing the left and right end portions of the rotary shaft 24 fixedly supported by the movable shade 22 on the pair of left and right cut-and-raised pieces 28C. It is supported. At this time, the movable shade 22 is configured such that the position of the rotating shaft 24 can be finely adjusted in the vertical direction by the cut-and-raise angle of the pair of left and right cut-and-raise pieces 28C (this will be described later).

As a result, when the movable shade 22 moves to the first position in a state where the body portion 28A of the shade support member 28 is placed and fixed on the shade assembly support region 30a4 of the heat sink 30, the rear end of the shade assembly 20 is The height from the lower surface of the main body portion 28A to the upper edge 22Ca of the rear end wall surface portion 22C is adjusted so that the upper edge 22Ca of the wall surface portion 22C passes through the rear focal point F of the projection lens 12.

As shown in FIG. 1, the heat sink 30 is an aluminum die-cast molded product, and includes a block portion 30A formed with a plurality of radiation fins 30Aa, and a flat plate extending from the block portion 30A along the horizontal plane toward the front of the unit. It has a shelf-like portion 30B and side wall portions 30C extending vertically upward on both left and right sides of the shelf-like portion 30B.

As shown in FIGS. 2 and 3, of the upper surface 30a of the heat sink 30, the light source support area 30a1 and the reflector support area 30a2 are formed in the block portion 30A, and the lens holder support area 30a3 is formed in the side wall portion 30C. , the shade assembly support region 30a4 is formed in the shelf-like portion 30B.

FIG. 5 is a detailed cross-sectional view taken along line VV of FIG.

As also shown in FIG. 5, the mounting and fixing of the shade support member 28 to the shade assembly support region 30a4 of the heat sink 30 is performed by burring and fixing.

In order to achieve this, burring fixing portions 28Aa projecting downward in a cylindrical shape are formed at both left and right end portions of the main body portion 28A of the shade support member 28, respectively. A pair of right and left through-holes 30Ba for inserting a pair of right and left burring fixing portions 28Aa are formed in the upper portion.

Then, as indicated by a two-dot chain line in FIG. 5, the body portion 28A of the shade support member 28 is placed on the shade assembly support region 30a4 of the heat sink 30 so that the burring fixing portions 28Aa are inserted into the insertion holes 30Ba. In this state, the lower ends of the burring fixing portions 28Aa are crimped so that the shade supporting member 28 is crimped and fixed to the shelf-shaped portion 30B of the heat sink 30 as indicated by the solid line in FIG. .

A positioning structure is provided on the shade support member 28 and the heat sink 30 so that the caulking is performed while the shade support member 28 is horizontally positioned with respect to the heat sink 30 .

That is, a pair of left and right positioning holes 28Ab are formed in the body portion 28A of the shade support member 28, and a pair of left and right positioning pins 30Bb projecting vertically upward are formed in the shelf-like portion 30B of the heat sink 30. It is

At that time, as shown in FIG. 2, one positioning hole 28Ab is formed in a circular opening shape having an inner diameter slightly larger than the outer diameter of the positioning pin 30Bb, and the other positioning hole 28Ab is formed by the positioning pin 30Bb. It is formed in an oblong oval opening shape having a front-to-rear width slightly larger than the outer diameter of 30Bb.

When the body portion 28A of the shade support member 28 is placed on the shade assembly support region 30a4 of the heat sink 30, the positioning pins 30Bb are inserted into the positioning holes 28Ab, so that the shade support member 28 moves horizontally. It is adapted to be positioned with respect to the heat sink 30 .

FIG. 6 is a view perspectively showing a light distribution pattern formed on a virtual vertical screen arranged at a position 25 m ahead of the vehicle by light emitted from the vehicle lamp 10 toward the front of the vehicle.

At that time, the light distribution pattern shown in FIG. 6A is the low beam light distribution pattern PL, and the light distribution pattern shown in FIG. 6B is the high beam light distribution pattern PH.

The low-beam light distribution pattern PL shown in FIG. 6A is a light distribution pattern formed when the movable shade 22 is at the first position.

This low-beam light distribution pattern PL is such that the image of the light emitting element 14 formed on the focal plane including the rear focal point F of the projection lens 12 by the light from the light emitting element 14 reflected by the reflector 16 is projected by the projection lens 12 as described above. It is a light distribution pattern formed by projecting an inverted projection image onto a virtual vertical screen.

This low-beam light distribution pattern PL is a left-handed low-beam light distribution pattern, and has cutoff lines CL1 and CL2 that are uneven on the left and right sides at the upper edge thereof. The cut-off lines CL1 and CL2 extend in the horizontal direction on the left and right sides of the line VV, which passes vertically through the vanishing point HV in the front direction of the lamp. The opposite lane side portion is formed as a lower cutoff line CL1, and the own lane side portion on the left side of the VV line is formed as an upper cutoff line CL2 rising from the lower cutoff line CL1 via an inclined portion. formed.

In this low-beam light distribution pattern PL, the elbow point E, which is the intersection of the lower cutoff line CL1 and the line VV, is located approximately 0.5 to 0.6° below HV, and its height The luminous intensity region HZL is located around the elbow point E.

In this low-beam light distribution pattern PL, the positions of the cutoff lines CL1 and CL2 are defined by the height position of the upper edge 22Ca of the movable shade 22 when moved to the first position.

The high-beam light distribution pattern PH shown in FIG. 6B is a light distribution pattern formed when the movable shade 22 is at the second position, and the low-beam light distribution pattern PL is defined by its cutoff lines CL1 and CL2. is formed as a laterally elongated light distribution pattern extending upwards, and the high luminous intensity region HZH also has a shape in which the high luminous intensity region HZL is extended upwards.

Next, the effect of this embodiment is demonstrated.

The lamp unit 10 according to this embodiment has a configuration in which the shade support member 28 that supports the movable shade 22 is supported by the heat sink 30 that supports the light emitting element 14 . Since it is placed and fixed on the shade assembly support region 30a4 on the upper surface 30a, the following effects can be obtained.

That is, in the state of the shade assembly 20 in which the movable shade 22 is assembled to the shade support member 28, the positional accuracy in the vertical direction of the upper edge 22Ca of the movable shade 22 when moved to the first position should be secured in advance. Then, even when the shade support member 28 is placed and fixed on the shade assembly support region 30a4 on the upper surface 30a of the heat sink 30, the positional accuracy of the upper edge 22Ca of the movable shade 22 can be maintained.

As described above, according to the present embodiment, when the projector-type lamp unit 10 having the movable shade 22 is moved to the first position where part of the light from the light-emitting element 14 directed toward the projection lens 12 is blocked, the The positional accuracy of the upper edge 22Ca of the movable shade 22 can be sufficiently ensured. Accordingly, when forming the low-beam light distribution pattern PL having the cutoff lines CL1 and CL2 in the upper portion, the cutoff lines CL1 and CL2 can be accurately formed at predetermined height positions.

Moreover, in this embodiment, since the shade support member 28 is made of a sheet metal member, the weight of the shade support member 28 can be reduced, so that the weight of the lamp unit 10 can also be reduced.

In this embodiment, the shade support member 28 includes a body portion 28A that is placed and fixed on the shade assembly support region 30a4 on the upper surface 30a of the heat sink 30, and a body portion 28A that extends upward from the body portion 28A. and a pair of left and right standing wall portions 28B, and a pair of left and right cut-and-raised pieces 28C formed by upwardly cutting and raising a part of the pair of left and right standing wall portions 28B. As the movable shade 22, the left and right ends of the rotating shaft 24 are placed on the pair of left and right cut-and-raised pieces 28C and supported by the shade support member 28, so that the structure is simple. The movable shade 22 can be supported.

At this time, the shade supporting member 28 is configured so that the position of the rotating shaft 24 of the movable shade 22 can be finely adjusted in the vertical direction by the cut-and-raised angle of the pair of left and right cut-and-raised pieces 28C. It is possible to obtain effects such as

That is, when the movable shade 22 is assembled to the shade support member 28, the position of the rotary shaft 24 can be finely adjusted in the vertical direction. The shade supporting member 28 can be placed and fixed on the shade assembly supporting region 30a4 on the upper surface 30a of the heat sink 30 in a state in which the positional accuracy of 22Ca is sufficiently secured in advance.

FIG. 7 is a diagram similar to FIG. 5 for explaining the operation of this embodiment.

As shown in FIG. 7A, the cut-and-raised piece 28C of the shade support member 28 is formed so as to extend in a substantially L shape in side view immediately after the rotating shaft 24 of the movable shade 22 is placed. The lower region extends along a horizontal plane flush with the main body portion 28A, and the front region extends along a vertical plane parallel to the standing wall portion 28B.

As shown in FIG. 7(b), when the cut-and-raised piece 28C is pressed in the direction of the arrow in the drawing, it comes into contact with the rotary shaft 24, and the rotary shaft 24 comes into contact with the standing wall portion 28B. As a result, the cut-and-raised piece 28C is plastically deformed, losing its substantially L-shaped shape and changing its cut-and-raise angle. As a result, the rotary shaft 24 is sandwiched between the cut-and-raised piece 28C and the standing wall portion 28B in the front-rear direction of the unit, so that the unit is positioned in the front-rear direction. In addition, since the cut-and-raised piece 28C has a shape that entrains the rotating shaft 24, positioning of the rotating shaft 24 in the vertical direction is also achieved.

At this time, the vertical position of the rotating shaft 24 is slightly displaced upward from the original position. That is, in the state shown in FIG. 7A, the height h0 from the lower surface of the main body portion 28A of the shade support member 28 to the rotation axis Ax1 (that is, the center line of the rotation shaft 24) is equal to the plate thickness of the main body portion 28A. and the radius of the rotary shaft 24, but in the state shown in FIG. 7(b), the height h1 is larger than the height h0 (h1>h0).

As shown in FIG. 7(c), when the cut-and-raised piece 28C is further pressed in the direction of the illustrated arrow, the cut-and-raised piece 28C is further plastically deformed to further collapse its substantially L-shaped shape, and the cut-and-raised piece 28C loses its shape. also change significantly. As a result, the vertical position of the rotating shaft 24 is displaced further upward from the position shown in FIG. 7(b). That is, the height h2 from the lower surface of the main body portion 28A of the shade support member 28 to the rotation axis Ax1 is a value that is even greater than the height h1 (h2>h1).

In the present embodiment, the rotation shaft 24 is positioned at the height h1 shown in FIG. 7(b), thereby ensuring the positional accuracy of the upper edge 22Ca of the movable shade 22 when it is moved to the first position. However, the height of the rotary shaft 24 can be adjusted by finely adjusting the cut-and-raised angular position of the cut-and-raised piece 28C according to the dimensional variations of the movable shade 22 and the shade support member 28. It is possible to set the height to a value larger or smaller than the height h1 shown in FIG. 7(b).

In this embodiment, the shade support member 28 is positioned on the body portion 28A of the shade support member 28 in the horizontal direction with respect to the heat sink 30 (that is, in the direction along the lens holder support area 30a3 on the upper surface 30a of the heat sink 30). As a positioning portion, a pair of left and right positioning holes 28Ab that engage with a pair of left and right positioning pins 30Bb formed on the heat sink 30 are formed. The positional accuracy of the edge 22Ca can also be improved in the horizontal direction.

Furthermore, in the present embodiment, the shade support member 28 is mounted and fixed by burring rivet, so that the shade support member 28 can be securely attached to the heat sink 30 without increasing the number of parts of the lamp unit 10. can be fixed to

Further, in this embodiment, as the shade supporting member 28, a reinforcing beam portion 28D is arranged so as to extend in the left-right direction at a position separated from the main body portion 28A in the unit front-rear direction, and both ends thereof are connected to the main body portion 28A. , the following effects can be obtained.

That is, although the shade support member 28 is made of a sheet metal member, the existence of the reinforcing beam portion 28D ensures sufficient rigidity of the shade support member 28, thereby supporting the movable shade 22. It can be done with high accuracy.

In the above-described embodiment, the shade supporting member 28 has been described as having a pair of left and right vertical wall portions 28B extending upward from the main body portion 28A. It is also possible to form a pair of left and right cut-and-raised pieces 28C by cutting and raising a part of the standing wall portion 28B upward at two locations on the left and right sides. be.

In the above-described embodiment, the shade support member 28 has been described as having each vertical wall portion 28B extending vertically upward from the main body portion 28A. It is also possible to

In the above embodiment, the shade supporting member 28 is described as being composed of a sheet metal member, but it is also possible to be composed of a die-cast molded product or the like.

Next, a modification of the above embodiment will be described.

FIG. 8 is a view, similar to FIG. 3, showing the essential parts of the lamp unit according to this modified example.

As shown in FIG. 8, the basic configuration of this modification is the same as that of the above embodiment, but the shapes of the heat sink 130 and the shade assembly 120 are partly different from those of the above embodiment.

That is, in this modification, the shelf-like portion 130B of the heat sink 130 extends obliquely upward from the block portion 130A toward the front of the unit.

The shade assembly support region 130a4 formed on the shelf 130B of the upper surface 130a of the heat sink 130 has the same inclination angle (specifically, for example, 15 degrees with respect to the horizontal direction) as the light source support region 130a1 and the reflector support region 130a2. °).

Also in this modified example, the lens holder support area 130a3 formed in the side wall portion 130C of the heat sink 130 is formed so as to extend along the horizontal plane.

Further, the shade assembly 120 of this modification is formed such that the main body portion 128A and the reinforcing beam portion 128D of the shade support member 128 extend at the same angle of inclination as the shade assembly support region 130a4 of the heat sink 130. As shown in FIG.

In the shade assembly 120 of this modified example, the structure of the movable shade 22 is the same as that of the above-described embodiment, and the structures of the vertical wall portions 128B and the cut-and-raised pieces 128C of the shade support member 128 are also the same as those of the above-described embodiment. It is almost the same as the case.

That is, also in this modification, each vertical wall portion 128B is formed to extend vertically upward from the front edge of the main body portion 128A, and each cut-and-raised piece 128C is shaped so as to involve the rotating shaft 24 therein.

Also in this modification, the main body portion 128A of the shade support member 128 is formed with a burring fixing portion 128Aa, and the shelf portion 130B of the heat sink 130 is formed with a positioning pin 130Bb.

Even when the configuration of this modified example is adopted, the main body portion 128A of the shade support member 128 is placed and fixed on the shade assembly support region 130a4 on the upper surface 130a of the heat sink 130, so that in the case of the above-described embodiment. It is possible to obtain the same effect as

The numerical values shown as the specifications in the above embodiment and its modification are merely examples, and it goes without saying that these values may be set to different values as appropriate.

Moreover, the present invention is not limited to the configurations described in the above embodiments and modifications thereof, and configurations with various other modifications can be employed.

REFERENCE SIGNS LIST 10 lamp unit 12 projection lens 14 light emitting element 14a light emitting surface 16 reflector 16a reflecting surface 18 lens holder 18a arm portion 20, 120 shade assembly 22 movable shade 22A shaft portion 22Aa spring accommodating portion 22B slope portion 22C rear end wall portion 22Ca upper end edge 22D Front end wall surface portion 24 Rotating shaft 26 Torsion coil spring 28, 128 Shade support member 28A, 128A Body portion 28Aa, 128Aa Burring fixing portion 28Ab Positioning hole (positioning portion)
28B, 128B, 28C, 128C cut -up, 28D, 128D reinforced beam 30A, 130A, 130A, 30A1, 130A1 Reflector support area 30A2, 130A2 Reflector support area 30A3, 130A3 Lens holder support area 30A4, 1 30A4 Shade Assei support Regions 30A, 130A Block portion 30Aa Radiation fins 30B, 130B Shelf portion 30Ba Insertion hole 30Bb, 130Bb Positioning pin 30C, 130C Side wall portion 32 Light source holder 40 Actuator 40a Output shaft 100 Vehicle lamp 102 Lamp body 104 Translucent cover Ax Optical axis Ax1 Rotation axis CL1 Lower cutoff line CL2 Upper cutoff line E Elbow point F Rear focus h0, h1, h2 Height HZH, HZL High light intensity area PH Light distribution pattern for high beam PL Light distribution pattern for low beam

Claims (7)

In a lighting unit configured to irradiate light from a light emitting element toward the front of the unit via a projection lens,
a heat sink supporting the light emitting element; a first position disposed between the light emitting element and the projection lens for blocking part of the light from the light emitting element toward the projection lens; and releasing the light blocking. a movable shade configured to take a second position; and rotatably supporting the movable shade so that the movable shade can selectively take the first position and the second position. a shade support member for
The lighting unit, wherein the shade supporting member is placed and fixed on the upper surface of the heat sink. 2. The lamp unit according to claim 1, wherein said shade supporting member is made of sheet metal. The movable shade has a rotating shaft extending in the left-right direction,
The shade support member includes a main body portion placed and fixed on the upper surface of the heat sink, an upright wall portion formed to extend upward from the main body portion, and a part of the upright wall portion cut upward. and a pair of left and right cut-and-raised pieces formed,
3. The lamp according to claim 2, wherein the movable shade is supported by the shade supporting member by placing left and right ends of the rotary shaft on the pair of left and right cut-and-raised pieces. unit. 4. The lamp according to claim 3, wherein the movable shade is configured such that the position of the rotating shaft can be finely adjusted in the vertical direction by the cut-and-raise angle of the pair of left and right cut-and-raise pieces. unit. 5. The body portion of the shade support member is formed with a positioning portion for positioning the shade support member with respect to the heat sink in a direction along the upper surface of the heat sink. lighting unit. The lamp unit according to any one of claims 2 to 5, wherein said mounting and fixing is performed by crimping and fixing by burring crimping. The shade supporting member is arranged to extend in the left-right direction at a position separated from the main body in the unit front-rear direction, and has reinforcing beams having both ends connected to the main body. The lamp unit according to any one of claims 3 to 6.

Images