CN213599291U

CN213599291U - Lamp unit

Info

Publication number: CN213599291U
Application number: CN202021196884.XU
Authority: CN
Inventors: 野村幸生
Original assignee: Koito Manufacturing Co Ltd
Current assignee: Koito Manufacturing Co Ltd
Priority date: 2019-06-26
Filing date: 2020-06-24
Publication date: 2021-07-02
Anticipated expiration: 2030-06-24
Also published as: JP2021005502A; JP7266473B2

Abstract

The present invention can sufficiently ensure the position accuracy of the upper edge of the movable shade when the movable shade is moved to the first position for shielding a part of the light emitted from the light emitting element and directed toward the projection lens, in the projection type lamp unit having the movable shade. A shade support member (28) that supports the movable shade (22) is configured to be supported by a heat sink (30) that supports the light emitting element (14). At this time, the shade support member (28) is configured to be mounted on a shade module support region (30a4) fixed to the upper surface (30a) of the heat sink (30). Thus, in a state where the movable shade is assembled to the shade support member to form the shade assembly (20), if the positional accuracy in the vertical direction of the upper end edge of the movable shade when moved to the first position can be secured in advance, the original positional accuracy of the upper end edge of the movable shade can be maintained even when the shade support member is mounted and fixed.

Description

Lamp unit

Technical Field

The utility model relates to a projection type lamp unit who possesses movable lens hood.

Background

Conventionally, there is known a projection type lamp unit configured to irradiate light from a light emitting element to the front of the unit via a projection lens.

"patent document 1" describes the following structure: in such a lamp unit, a movable shade is disposed between the light emitting element and the projection lens, and the movable shade is capable of being positioned at a first position at which a part of light emitted from the light emitting element and directed toward the projection lens is shielded and a second position at which the shielding is released.

The lamp unit described in the "patent document 1" includes a shade support member that rotatably supports a movable shade so that the movable shade can be selectively positioned at a first position and a second position, and the shade support member is supported by a heat sink that supports a light emitting element.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-49730

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved by the utility model

In the projection-type lamp unit including such a movable shade, the movable shade can be moved to the first position to form a light distribution pattern having a cutoff line at an upper portion thereof, but in order to form the cutoff line at a predetermined height position with high accuracy, it is important to sufficiently ensure the positional accuracy of the upper end edge of the movable shade when moved to the first position.

However, in the lamp unit described in the above-mentioned "patent document 1", the shade support member is screwed and fixed to the heat sink from the unit front side in a state of being disposed so as to extend along a vertical plane orthogonal to the unit front-rear direction, and therefore it is not easy to sufficiently ensure the positional accuracy of the upper end edge of the movable shade when moving to the first position.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lamp unit which can sufficiently ensure the positional accuracy of the upper edge of a movable shade when the lamp unit moves to a first position where a part of light emitted from a light emitting element and directed toward a projection lens is blocked.

Means for solving the problems

The utility model discloses a design lens hood supporting component's supporting structure realizes above-mentioned purpose.

That is, the lamp unit according to the present invention is configured to irradiate light emitted from the light emitting element to the front of the unit via the projection lens,

the disclosed device is provided with: a heat sink supporting the light emitting element; a movable shade which is disposed between the light emitting element and the projection lens and is configured to be capable of being positioned at a first position which blocks a part of light emitted from the light emitting element toward the projection lens and a second position which releases the blocking; and a shade support member that rotatably supports the movable shade so that the movable shade can be selectively positioned at the first position or the second position,

the shade support member is mounted and fixed on an upper surface of the heat sink.

The "lamp unit" may be configured to allow the light emitted from the light source to directly enter the projection lens, or may be configured to allow the light emitted from the light source to enter the projection lens via another optical member (e.g., a mirror, a condenser lens, or the like).

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

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

The "shade support member" is not particularly limited as long as it is mounted and fixed on the upper surface of the heat sink, and in this case, for example, screw fastening or press fastening may be employed as the mounting and fixing means.

Effect of the utility model

The lamp unit according to the present invention has a structure in which the shade support member for supporting the movable shade is supported by the heat sink supporting the light emitting element, and at this time, the shade support member is mounted and fixed on the upper surface of the heat sink, so that the following operational effects can be obtained.

That is, if the positional accuracy in the vertical direction of the upper end edge of the movable hood when the movable hood is moved to the first position is secured in advance in a state where the movable hood is assembled to the hood support member to form the hood assembly, the positional accuracy of the upper end edge of the movable hood can be maintained in this state even when the hood support member is mounted and fixed on the upper surface of the heat sink.

As described above, according to the present invention, in the projection type lamp unit including the movable shade, it is possible to sufficiently ensure the positional accuracy of the upper edge of the movable shade when the movable shade is moved to the first position where a part of the light emitted from the light emitting element and directed toward the projection lens is shielded. Thus, when forming a light distribution pattern having a cutoff line at the upper portion, the cutoff line can be formed at a predetermined height position with high accuracy.

In the above configuration, if the shade support member is made of a metal plate member, the weight of the shade support member can be reduced, and thus the weight of the lamp unit can be reduced.

In the case of adopting such a configuration, the mask support member is configured to include: a main body part for placing and fixing the upper surface of the radiator; a standing wall portion formed to extend upward from the main body portion; and a pair of left and right rising pieces formed by cutting and rising a part of the standing wall portion upward, and a structure in which both left and right end portions of the rotation shaft are placed on the pair of left and right rising pieces and supported by the shade support member is adopted as the structure of the movable shade, so that the movable shade can be supported by a simple structure.

In this case, if the shade support member is configured to be able to finely adjust the position of the rotating shaft of the movable shade in the vertical direction by cutting and raising the pair of left and right raising pieces, the following operational effects can be obtained.

That is, since the position of the pivot shaft can be finely adjusted in the vertical direction when the movable hood is assembled to the hood support member, the hood support member can be placed and fixed on the upper surface of the heat sink while sufficiently securing the positional accuracy of the upper edge when the movable hood is moved to the first position.

Further, if the positioning portion for positioning the shade support member with respect to the heat sink in the direction along the upper surface thereof is formed in the main body portion of the shade support member, the positional accuracy of the upper end edge of the movable shade when moved to the first position can be improved in the horizontal direction as well.

Further, in the case where the shade support member is formed of a metal plate member, if the shade support member is placed and fixed by crimping and fixing by crimping, the shade support member can be reliably fixed to the heat sink without increasing the number of components of the lamp unit.

In the above configuration, if a configuration is adopted in which the shade support member includes a reinforcing beam portion that extends in the left-right direction at a position apart from the main body portion of the shade support member in the unit front-rear direction and both end portions are connected to the main body portion, the following operational effects can be obtained.

That is, even if the shade support member is formed of a sheet metal member, the rigidity of the shade support member can be sufficiently ensured by the presence of the reinforcing beam portion, and thus the movable shade can be supported with high accuracy.

Drawings

Fig. 1 is a side sectional view showing a vehicle lamp including a lamp unit according to an embodiment of the present invention.

Fig. 2 is a plan view showing the lamp unit described above.

Fig. 3 is a detailed view of section III of fig. 1.

Fig. 4 is a perspective view of the light shield assembly of the lamp unit shown in a disassembled state.

Fig. 5 is a detailed view of the V-V line of fig. 2.

Fig. 6 is a perspective view showing a light distribution pattern formed by the irradiation light emitted from the lamp unit.

Fig. 7 is a diagram for explaining the operation of the above embodiment, and is the same as fig. 5.

Fig. 8 is a view similar to fig. 3, showing a modification of the above embodiment.

Description of the symbols

10 Lamp unit

12 projection lens

14 light emitting element

14a light emitting surface

16 reflecting mirror

16a reflecting surface

18 lens holder

18a arm part

20. 120 lens hood assembly

22 Movable light shield

22A shaft part

22Aa spring housing part

22B inclined plane part

22C rear end wall face

22Ca upper edge

22D front end wall face

24 rotating shaft

26 torsion spring

28. 128 light shield support member

28A, 128A body

28Aa and 128Aa flanging fixing part

28Ab locating hole (locating part)

28B, 128B standing wall part

28C, 128C cut-and-raised slice

28D, 128D stiffened beam section

30. 130 heat sink

30a, 130a upper surface

30a1, 130a1 light source support region

30a2, 130a2 mirror support region

30a3, 130a3 lens holder support region

30a4, 130a4 light shield assembly support area

30A, 130A block part

30Aa radiating fin

30B, 130B shelf-like part

30Ba plug-in hole

30Bb, 130Bb locating pin

30C, 130C side wall part

32 light source holder

40 actuator

40a output shaft

100 vehicle lamp

102 lamp body

104 light-transmitting cover

Ax optical axis

Ax1 axis of rotation

CL1 lower cutoff line

CL2 upper cutoff

E inflection point

F back side focus

h0, h1, h2 height

HZH, HZL high luminosity zone

Light distribution pattern for PH high beam

Light distribution pattern for PL low beam

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

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

In fig. 1 and 2, the direction indicated by X is the "cell front", the direction indicated by Y is the "left direction" (the "right direction" in the front view of the cell) orthogonal to the "cell front", and the direction indicated by Z is the "upper direction". The same applies to the figures other than fig. 1 and 2.

The vehicle lamp 100 is a headlamp provided at a front end portion of a vehicle, and is configured such that a lamp unit 10 is accommodated in a lamp chamber formed by a lamp body 102 and a translucent cover 104 in a state in which an optical axis is adjusted so that a front-rear direction (i.e., a unit front-rear direction) thereof coincides with a vehicle front-rear direction.

The lamp unit 10 includes: a projection lens 12; a light emitting element 14 disposed on the unit rear side of the rear focal point F of the projection lens 12; a reflector 16 disposed so as to cover the light emitting element 14 from above and reflect the light emitted from the light emitting element 14 toward the projection lens 12; and a movable light shield 22 disposed between the light emitting element 14 and the projection lens 12.

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

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

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

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

The reflecting surface 16a of the reflecting mirror 16 is formed of a curved surface having a substantially elliptical surface shape with the light emission center of the light emitting element 14 as the 1 st focal point. The vertical cross-sectional shape of the reflecting surface 16a along the optical axis Ax is set to an elliptical shape with a point slightly in front of the rear focal point F as the 2 nd focal point, and the eccentricity of the reflecting surface 16a is set to be gradually increased from the vertical cross-section toward the horizontal cross-section. Thus, the reflector 16 converges the light emitted from the light emitting element 14 substantially at a point slightly in front of the rear focal point F in the vertical plane, and largely moves the converging position forward in the horizontal plane.

The movable shade 22 includes a pivot shaft 24 extending in the left-right direction (i.e., the vehicle width direction), and both left and right ends of the pivot shaft 24 are rotatably supported by shade support members 28. In a state where the movable shade 22 is supported by the shade support members 28 to form the shade assembly 20, the shade support members 28 are supported by the upper surface 30a of the heat sink 30.

Fig. 3 is a detailed view of section III of fig. 1.

As shown in fig. 2 and 3, the light source support region 30a1 that supports the light emitting element 14 and the light source holder 32 and the mirror support region 30a2 that supports the mirror 16 on the upper surface 30a of the heat sink 30 are formed by inclined surfaces that are inclined downward toward the rear of the cell, while the lens holder support region 30a3 that supports the lens holder 18 and the mask assembly support region 30a4 that supports the mask assembly 20 are formed by horizontal surfaces.

At this time, the mirror support region 30a2 is displaced to the upper side than the light source support region 30a1, and the lens holder support region 30a3 is displaced to the upper side than the shade module support region 30a 4.

Fig. 4 is a perspective view of the light shield assembly 20 shown disassembled.

As shown in fig. 4, the movable shade 22 includes: a shaft portion 22A that fixedly supports the rotating shaft 24 in a state where the rotating shaft 24 is penetrated; a rear end surface portion 22B extending obliquely upward from the shaft portion 22A toward the unit rear; a rear end wall surface portion 22C extending vertically upward from a rear end edge of the inclined surface portion 22B; and a front end wall surface portion 22D extending vertically downward from the shaft portion 22A.

The rear end wall surface portion 22C is formed to curve and extend toward the unit front side from the rear focal point F toward the left and right sides in a plan view, and the upper end edge 22Ca is formed to have different left and right heights and to extend in the horizontal direction.

As shown in fig. 3, the movable hood 22 can be positioned at a first position shown by a solid line in the drawing and a second position (position shown by a two-dot chain line in the drawing) rotated by a predetermined angle toward the unit rear side from the first position, with the rotation axis Ax1 extending in the left-right direction as the center, by driving of the actuator 40 supported by the radiator 30.

The actuator 40 includes an output shaft 40a protruding toward the front end wall surface portion 22D of the movable shade 22, and the output shaft 40a is disposed in a state of facing obliquely upward toward the unit front. The actuator 40 is driven when a beam switching switch, not shown, is operated, and reciprocates the output shaft 40a between a position indicated by a solid line and a position indicated by a two-dot chain line in fig. 3.

When the movable shade 22 is in the first position, the upper edge 22Ca of the rear end wall surface portion 22C is arranged to pass through the rear focal point F of the projection lens 12, thereby blocking a part of the light emitted from the light emitting element 14 reflected by the reflector 16; on the other hand, when the movable shade 22 moves to the second position, the upper end edge 22Ca of the rear end wall surface portion 22C is displaced downward to a certain extent from the rear focal point F of the projection lens 12, thereby releasing the light blocking of the light emitted from the light emitting element 14 reflected by the reflector 16.

The shade support member 28 is a metal plate member, and is formed by performing machining such as press forming on a metal plate (for example, a steel plate).

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

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

The left and right pair of wall portions 28B are formed to extend upward from the front end edge thereof (specifically, vertically upward along a vertical plane parallel to the rotation axis Ax 1) at both left and right end portions of the main body portion 28A.

The pair of left and right raised pieces 28C is formed by cutting and raising a part of the pair of left and right opposing wall portions 28B upward. As shown in fig. 4, each cut-and-raised piece 28C is formed to extend in a substantially L shape in a side view in a state where the shade support member 28 is single. That is, the lower region of each cut-and-raised piece 28C extends along a horizontal plane coplanar with the body portion 28A, and the front region thereof extends along a vertical plane parallel to each standing wall portion 28B.

The reinforcing beam portion 28D is disposed so as to extend in the left-right direction at a position away from the main body portion 28A toward the unit front, and both ends thereof are connected to the main body portion 28A. In this case, the reinforcing beam portion 28D is formed so as to be positioned between the left and right pair of wall portions 28B and to extend parallel to the main body portion 28A in a state of being displaced slightly downward from the main body portion 28A.

The pivot shaft 24 is pushed into the shaft 22A of the movable shade 22 from the side, and at this time, a torsion spring 26 is attached to the pivot shaft 24. A spring accommodating portion 22Aa for accommodating the torsion spring 26 is formed in the shaft portion 22A of the movable shade 22.

One end of the torsion spring 26 is engaged with the lower surface of the inclined surface portion 22B of the movable shade 22, and the other end thereof is engaged with the upper surface of the main body portion 28A of the shade support member 28 (see fig. 5), thereby elastically biasing the movable shade 22 to the first position.

As shown in fig. 3, the output shaft 40a of the actuator 40 moves forward from the position shown by the solid line to the position shown by the two-dot chain line against the elastic force of the torsion spring 26, and the movable shade 22 rotates and moves from the first position to the second position.

The movable shade 22 is supported so as to be rotatable with respect to the shade support member 28 by being placed on a pair of left and right raised pieces 28C at both left and right end portions of the rotating shaft 24 fixedly supported by the movable shade 22. At this time, the movable shade 22 is configured to be able to finely adjust the position of the rotating shaft 24 in the vertical direction based on the cutting and rising angle of the pair of right and left rising pieces 28C (this will be described later).

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

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

As shown in fig. 2 and 3, the light source support area 30A1 and the mirror support area 30A2 in the upper surface 30A of the heat sink 30 are formed in the block portion 30A, the lens holder support area 30A3 is formed in the side wall portion 30C, and the shade assembly support area 30A4 is formed in the shelf portion 30B.

Fig. 5 is a cross-sectional detail view taken along line V-V of fig. 2.

As shown in fig. 5, the placement and fixation of the shade support member 28 on the shade module support region 30a4 of the heat sink 30 is performed by press-fitting fixation by crimping.

In order to achieve this, flange fixing portions 28Aa protruding in a cylindrical shape downward are formed at both left and right end portions of the body portion 28A of the hood support member 28, and a pair of left and right insertion holes 30Ba for inserting the pair of left and right flange fixing portions 28Aa are formed in the shelf portion 30B of the heat sink 30.

As shown by the two-dot chain lines in fig. 5, the respective burring fixing portions 28Aa are inserted into the respective insertion holes 30Ba, and the lower end portions of the respective burring fixing portions 28Aa are crimped and pressed in a state where the main body portion 28A of the hood support member 28 is placed on the hood assembly support region 30a4 of the heat sink 30, whereby the hood support member 28 is crimped and fixed to the shelf-like portion 30B of the heat sink 30 as shown by the solid lines in fig. 5.

The shade support member 28 and the heat sink 30 are provided with positioning structures for performing the press-fitting fixation in a state where the shade support member 28 is positioned in the horizontal direction with respect to the heat sink 30.

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

At this 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 in a horizontally long oval opening shape having a front-rear width slightly larger than the outer diameter of the positioning pin 30 Bb.

When the main body portion 28A of the hood support member 28 is placed on the hood assembly support region 30a4 of the heat sink 30, the positioning pins 30Bb are inserted into the positioning holes 28Ab, and the hood support member 28 is positioned relative to the heat sink 30 in the horizontal direction.

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

At this time, the light distribution pattern shown in fig. 6 (a) is the low beam light distribution pattern PL, and the light distribution pattern shown in fig. 6 (b) is the high beam light distribution pattern PH.

The low beam light distribution pattern PL shown in fig. 6 (a) is a light distribution pattern formed when the movable shade 22 is at the first position.

The low beam light distribution pattern PL is a light distribution pattern formed by projecting the image of the light emitting element 14 as an inverted projected image onto the virtual vertical screen by the projection lens 12, and the image of the light emitting element 14 is formed on a focal plane including the rear focal point F of the projection lens 12 by the light emitted from the light emitting element 14 reflected by the reflecting mirror 16.

The low-beam light distribution pattern PL is a low-beam light distribution pattern for left light distribution, and has cutoff lines CL1, CL2 having different left and right heights at its upper end edge. The cutoff lines CL1 and CL2 extend in the horizontal direction so as to have different left and right heights with a V-V line passing through a vanishing point in the front direction of the lamp in the vertical direction, i.e., H-V, as a boundary, and a right-side lane side portion of the V-V line is formed as a lower cutoff line CL1, and a left-side lane side portion of the V-V line is formed as an upper cutoff line CL2 rising from the lower cutoff line CL1 via an inclined portion.

In the low-beam light distribution pattern PL, an inflection point E, which is an intersection of the lower cutoff line CL1 and the V-V line, is located below about 0.5 to 0.6 ° of H-V, and the high light intensity region HZL is located around the inflection point E.

In the low-beam light distribution pattern PL, the positions of the cutoff lines CL1, 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. 6 (b) is a light distribution pattern formed when the movable shade 22 is in the second position, and is formed as a horizontally long light distribution pattern in which the low beam light distribution pattern PL is expanded upward of the cut-off lines CL1 and CL2, and the high luminous intensity region HZH is also formed in a shape in which the high luminous intensity region HZL is expanded upward.

The advantageous effects of the present embodiment will be described below.

In the lamp unit 10 according to the present embodiment, the shade support member 28 supporting the movable shade 22 is supported by the heat sink 30 supporting the light emitting element 14, and at this time, the shade support member 28 is placed on the shade unit support region 30a4 fixed to the upper surface 30a of the heat sink 30, so that the following operational effects can be obtained.

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

As described above, according to the present embodiment, in the projection type lamp unit 10 including the movable shade 22, it is possible to sufficiently ensure the positional accuracy of the upper end edge 22Ca of the movable shade 22 when moving to the first position where part of the light emitted from the light emitting element 14 toward the projection lens 12 is blocked. Thus, when forming the low-beam light distribution pattern PL having the cutoff lines CL1 and CL2 at the upper portion, the cutoff lines CL1 and CL2 can be formed at predetermined height positions with high accuracy.

In addition, in the present embodiment, since the shade support member 28 is formed of a metal plate member, the weight of the shade support member 28 can be reduced, and thus the weight of the lamp unit 10 can be reduced.

In this case, the mask support member 28 of the present embodiment includes: a main body 28A on which a hood assembly support region 30a4 fixed to the upper surface 30a of the heat sink 30 is placed; a pair of left and right opposing wall portions 28B formed to extend upward from the main body portion 28A; and a pair of left and right raised pieces 28C formed by cutting and raising a part of the pair of left and right opposing wall portions 28B upward, and the movable shade 22 is configured such that both left and right end portions of the rotating shaft 24 thereof are placed on the pair of left and right raised pieces 28C and supported by the shade support member 28, so that the movable shade 22 can be supported by a simple structure.

At this time, since the shade support member 28 is configured to be able to finely adjust the position of the rotating shaft 24 of the movable shade 22 in the vertical direction based on the cut-and-rise angle of the pair of left and right raised pieces 28C, the following operational effects can be obtained.

That is, since the position of the pivot shaft 24 can be finely adjusted in the vertical direction at the stage of assembling the movable shade 22 to the shade support member 28, the shade support member 28 can be placed and fixed on the shade assembly support region 30a4 of the upper surface 30a of the heat sink 30 while sufficiently securing the positional accuracy of the upper edge 22Ca when the movable shade 22 is moved to the first position in advance.

Fig. 7 is a diagram for explaining the operation of the present embodiment as described above, and is the same as fig. 5.

As shown in fig. 7 (a), the cut-and-raised piece 28C of the shade support member 28 is formed to extend in a substantially L-shape in side view immediately after the pivot shaft 24 of the movable shade 22 is placed thereon, and has a lower region extending along a horizontal plane coplanar with the main body portion 28A and a front region extending 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 shown, the cut-and-raised piece abuts against the rotating shaft 24, and the rotating shaft 24 abuts against the standing wall portion 28B. As a result, the cut-and-raised piece 28C is plastically deformed, the substantially L-shaped shape thereof is changed, and the cut-and-rise angle thereof is also changed. Thus, the pivot shaft 24 is positioned in the unit front-rear direction because it is sandwiched between the cut-and-raised piece 28C and the standing wall portion 28B. The cut-and-raised piece 28C has a shape that winds the rotating shaft 24, and thereby also realizes the vertical positioning of the rotating shaft 24.

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. 7 (a), the height h0 from the lower surface of the main body portion 28A of the shade support member 28 to the rotation axis Ax1 (i.e., the center line of the rotation shaft 24) is the same as the sum of the plate thickness of the main body portion 28A and the radius of the rotation shaft 24, but in the state shown in fig. 7 (b), the height h1 is a value greater than the height h0 (h1 > h 0).

As shown in fig. 7 (C), when the cut-and-raised piece 28C is pressed further in the direction of the arrow shown in the figure, the cut-and-raised piece 28C is further largely plastically deformed, the substantially L-shaped shape thereof is further largely changed, and the cut-and-raised angle is also further largely changed. 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 greater than the height h1 (h2 > h 1).

In the present embodiment, the rotary shaft 24 is positioned at the height h1 shown in fig. 7 (b), thereby ensuring the positional accuracy of the upper end edge 22Ca of the movable shade 22 when moving to the first position, but the height of the rotary shaft 24 may be made larger or smaller than the height h1 shown in fig. 7 (b) by finely adjusting the cut-and-raised angle position of the cut-and-raised piece 28C in accordance with the variation in the dimensions of each of the movable shade 22 and the shade support member 28.

In the present embodiment, the pair of left and right positioning holes 28Ab that engage with the pair of left and right positioning pins 30Bb formed on the heat sink 30 are formed in the body portion 28A of the hood support member 28 as positioning portions that position the hood support member 28 in the horizontal direction (i.e., in the direction along the lens holder support region 30a3 of the upper surface 30a of the heat sink 30) with respect to the heat sink 30, so that the positional accuracy of the upper end edge 22Ca of the movable hood 22 when moving to the first position can be improved in the horizontal direction as well.

In the present embodiment, since the placement and fixation of the shade support member 28 are performed by the crimping fixation by the crimping, the shade support member 28 can be reliably fixed to the heat sink 30 without increasing the number of components of the lamp unit 10.

In the present embodiment, the hood support member 28 is configured to include the reinforcing beam portion 28D, and the reinforcing beam portion 28D is disposed so as to extend in the left-right direction at a position apart from the main body portion 28A of the hood support member 28 in the unit front-rear direction, and both end portions are connected to the main body portion 28A, so that the following operational effects can be obtained.

That is, even if the shade support member 28 is formed of a sheet metal member, the rigidity of the shade support member 28 can be sufficiently ensured by the presence of the reinforcing beam portion 28D, and thus the movable shade 22 can be supported with high accuracy.

In the above embodiment, the structure in which the left and right pair of wall portions 28B extend upward from the main body portion 28A has been described as the shade support member 28, but the structure may be as follows: the single standing wall portion 28B extends upward from the main body portion 28A, and a pair of left and right raised pieces 28C are formed by cutting and raising a part of the standing wall portion 28B upward at two left and right positions.

In the above embodiment, the structure in which each standing wall portion 28B extends vertically upward from the main body portion 28A has been described as the shade support member 28, but a structure in which each standing wall portion extends in a direction inclined with respect to the vertical upward direction may be employed.

In the above embodiment, the case where the shade support member 28 is formed of a metal plate member has been described, but may be formed of a die cast product or the like.

Next, a modified example of the above embodiment will be explained.

Fig. 8 is a view similar to fig. 3, showing a main part of the lamp unit according to the modification.

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 module 120 are partially different from those of the above embodiment.

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

The hood assembly support region 130a4 formed by the shelf portion 130B on the upper surface 130a of the heat sink 130 is formed to extend at the same inclination angle (specifically, at an angle of about 15 ° with respect to the horizontal direction, for example) as the light source support region 130a1 and the mirror support region 130a 2.

In the present modification, the lens holder support region 130a3 formed in the side wall 130C of the heat sink 130 is also formed to extend along the horizontal plane.

In the hood assembly 120 of the present modification, the main body portion 128A and the reinforcing beam portions 128D of the hood support member 128 extend at the same inclination angle as the hood assembly support region 130a4 of the heat sink 130.

In the shade assembly 120 of the present modification, the movable shade 22 is also configured in the same manner as in the above-described embodiment, and the standing wall portions 128B and the cut-and-raised pieces 128C of the shade support member 128 are also configured in the same manner as in the above-described embodiment.

That is, in the present modification, the standing wall portions 128B are also formed to extend vertically upward from the front end edge of the body portion 128A, and the cut-and-raised pieces 128C are formed in a shape to wind the rotation shaft 24.

In the present modification, the flange fixing portion 128Aa is formed in the main body portion 128A of the hood support member 128, and the positioning pin 130Bb is formed in the shelf-like portion 130B of the heat sink 130.

In the case of the configuration of the present modification, since the main body portion 128A of the hood support member 128 is configured to be mounted on the hood assembly support region 130a4 fixed to the upper surface 130a of the heat sink 130, the same operational effects as those of the above-described embodiment can be obtained.

In the above-described embodiment and the modifications thereof, the numerical values shown as various data are merely examples, and it is needless to say that values other than these may be set as appropriate.

The present invention is not limited to the configurations described in the above embodiments and modifications thereof, and other configurations may be adopted with various modifications.

Claims

1. A lamp unit configured to irradiate light emitted from a light emitting element to the front of the unit via a projection lens,

the disclosed device is provided with: a heat sink supporting the light emitting element; a movable shade which is disposed between the light emitting element and the projection lens and is configured to be capable of being positioned at a first position that blocks a part of light emitted from the light emitting element and directed toward the projection lens and a second position that releases the blocking; and a shade support member that rotatably supports the movable shade so that the movable shade can be selectively positioned at the first position or the second position,

2. The luminaire unit of claim 1,

the shade support member is formed of a metal plate member.

3. The luminaire unit of claim 2,

the movable shade is provided with a rotating shaft extending along the left-right direction,

the shade support member includes: a main body portion mounted and fixed on an upper surface of the heat sink; a standing wall portion formed to extend in an upward direction from the main body portion; and a pair of left and right raised pieces formed by cutting and raising a part of the rising wall portion upward,

the movable shade is supported by the shade support member by being placed on the pair of left and right lift tabs through both left and right end portions of the pivot shaft.

4. The luminaire unit of claim 3,

the movable shade is configured to be capable of fine adjustment of the position of the rotating shaft in the vertical direction based on the cut-and-raised angle of the pair of left and right raised pieces.

5. Lamp unit according to claim 3 or 4,

a positioning portion that positions the shade support member with respect to the heat sink in a direction along an upper surface of the heat sink is formed in the main body portion of the shade support member.

6. The luminaire unit of claim 1,

the mounting and fixing are performed by crimping and fixing by crimping.

7. The luminaire unit of claim 3,

the shade support member includes a reinforcing beam portion that is disposed so as to extend in the left-right direction at a position apart from the main body portion in the unit front-rear direction, and both end portions of which are connected to the main body portion.