JP2014175097A - Lamp unit for vehicle head lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp unit for a vehicle head lamp by which a plurality of lamp specifications can be set by merely changing a shade by making a heat sink and a reflector common.SOLUTION: A lamp unit for a vehicle head lamp comprises: a pair of left and right positioning pins 20 arranged at a heat sink 12; a pair of left and right positioning holes 24 which are formed at a shade 14, and positioned at the respective positioning pins 20 so as to be engaged therewith; a setting hole 26 which is formed at the shade 14, and distinguishes the specification of the shade 14; a pair of left and right slits 29 which are formed at a reflector 15, and engaged with the positioning pins 20 so that the reflector 15 can be moved to a vehicle width direction which substantially intersects with an optical axis O with respect to the shade 14; and a reflector positioning protrusion 30 which is formed at the reflector 15, and positioned at the setting hole 26 so as to be engaged therewith.

Description

  The present invention relates to a vehicle headlamp lamp unit, and more particularly to a projector type vehicle headlamp lamp unit.

  The projector-type headlamp is generally unitized as known in, for example, Patent Document 1 and Patent Document 2, and reflects light from a light source disposed on an optical axis extending in the vehicle front-rear direction. Therefore, the reflected light is irradiated forward of the lamp through a projection lens provided in front of the reflector.

  In addition, an LED light source unit provided with a semiconductor light emitting element such as an LED is used as the light source. In general, the LED light source unit generates heat when it is turned on, but the LED has a defect that it is weak against heat. Therefore, the LED light source unit is disposed on the heat sink so that the heat sink can dissipate heat.

  Furthermore, when a projector-type headlamp is configured for low beam (passing beam) illumination, a portion of the reflected light from the reflector is shielded between the projection lens and the reflector to remove upward illumination light. A shade is provided to irradiate forward with a low beam light distribution pattern having a predetermined cutoff line.

  Therefore, in general, a projector-type lamp unit includes an LED light source unit, a projection lens, a heat sink, a reflector, a shade, and the like, which are unitized and arranged in the vehicle lamp chamber.

  In addition, vehicles such as automobiles have left-hand driving in Japan, left-hand driving and right-hand driving in overseas, and the light distribution pattern varies depending on the country and region. Therefore, a structure for obtaining a light distribution pattern that matches the country and region of the vehicle lamp is also required. For example, the light distribution pattern is different in Japan, Europe, and North America. Therefore, it is necessary to change the lamp structure to obtain a light distribution pattern corresponding to the country and region where the vehicle is used. Conventionally, each component is set for each specification.

JP 2008-34279 A. JP 2010-238605 A.

  As described above, in the conventional projector-type lamp unit, when changing to a structure that matches the specification, each component is set for each specification. For this reason, the number of parts is large, management is troublesome, and the cost is increased.

  Accordingly, the present invention has been made in view of the above-described problems, and at least a vehicle headlamp that can reduce costs by using at least a heat sink and a reflector so that the lamp can be changed to a plurality of lamp specifications by simply replacing the shade. The purpose is to provide a lamp unit for a lamp.

  The present invention has been proposed to achieve the above object, and a vehicle headlamp lamp unit according to the present invention includes a projection lens disposed on an optical axis extending in the vehicle front-rear direction, an LED light source unit, A heat sink for dissipating heat generated in the LED light source unit; a reflector for reflecting light from the LED light source unit toward the front of the vehicle; and the reflector disposed between the projection lens and the LED light source unit. A shade that shields a part of the reflected light from the light to form a cut-off line of the light distribution pattern, a pair of left and right positioning pins provided on the heat sink, and an engagement positioning on the positioning pins provided on the shade, respectively. A pair of left and right positioning holes, provided in the shade, a setting hole for distinguishing specifications of the shade, and provided in the reflector, A pair of left and right slits that are respectively engaged with the positioning pins so as to be movable in the vehicle width direction intersecting the optical axis substantially perpendicular to the optical axis with respect to the shade, and provided in the reflector and engaged with the setting hole And a reflector positioning projection to be positioned.

  According to this configuration, the heat sink and the reflector are common regardless of the specification, and if only the shade and the shade for the specification are prepared, it can be changed to a vehicle headlamp lamp unit for a different specification. That is, a shade provided with different setting holes for each specification is arranged on the heat sink, and a positioning hole provided in the shade is arranged to engage with a positioning pin of the heat sink, and then a reflector is provided on the shade on the reflector. When the reflector positioning protrusion is disposed so as to engage with the setting hole of the shade, the reflector is attached at a position corresponding to the specification with respect to the shade. The reflector is displaced in the vehicle width direction according to the position of the setting hole of the shade. However, since the reflector is provided with a slit that allows movement in the vehicle width direction, the vehicle The displacement in the direction is absorbed by the movement in the left-right direction by the slit.

  Further, it is preferable that the heat sink, the reflector, and the shade are provided with attachment holes for attaching and fixing attachment screws in common at positions facing each other.

  According to this configuration, the heat sink, the reflector, and the shade can be fixed and integrated into one by attaching the mounting screw to the mounting hole provided corresponding to the common position.

  According to the present invention, the heat sink and the reflector can be made common regardless of the specifications, and can be changed to a plurality of lamp specifications simply by replacing the shade. Therefore, the number of parts to be managed is reduced, and the cost can be reduced. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a principal part block diagram of the lamp unit for vehicle headlamps which concerns on one Embodiment of this invention, (a) is the top view shown in the state which attached the reflector, (b) is the plane shown in the state which removed the reflector FIG. It is the principal part exploded view of the lamp unit for vehicle headlamps same as the above, and is the figure seen from the front side. It is a principal part disassembled perspective view of the lamp unit for vehicle headlamps shown in FIG. It is a figure explaining the lamp unit for vehicle headlamps using the shade of specifications for Japan, (a) is a top view of the shade, (b) is a figure explaining attachment of the shade, a heat sink, and a reflector. (c) is a figure which shows an example of the low beam light distribution pattern at the time of attaching the shade of specifications for Japan. FIG. 6 is a diagram for explaining a vehicle headlamp lamp unit using a shade for European regions, where (a) is a plan view of the shade, (b) is a diagram explaining attachment of the shade, a heat sink, and a reflector; (c) is a figure which shows an example of the low beam light distribution pattern at the time of attaching the shade. FIG. 2 is a diagram for explaining a vehicle headlamp lamp unit using a shade for North America, (a) is a plan view of the shade, (b) is a diagram for explaining the attachment of the shade, a heat sink, and a reflector; (c) is a figure which shows an example of the low beam light distribution pattern at the time of attaching the shade.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings.

1 to 3 show an embodiment of a lamp unit for a vehicle headlamp according to the present invention. FIG. 1 (a) is a plan view showing the reflector attached, and FIG. 1 (b) is a diagram showing the reflector. FIG. 2 is an exploded view of the main part of the same vehicle headlamp lamp unit as viewed from the front side, and FIG. 3 is an exploded main part of the same vehicle headlamp lamp unit shown in FIG. It is a perspective view. Moreover, in embodiment shown in FIGS. 1-3, the case where it comprises as a vehicle headlamp lamp unit of the specification for domestic use using the shade for Japanese specification is taken as an example. Furthermore, in the following description, the XR direction in FIG. 1 is viewed from the driver side, the right side in the vehicle width direction, the XL direction is also the left side in the vehicle width direction, the YR direction is the rear side (driver side) direction, and the YF direction is the same. Front side of the vehicle
The (traveling direction) direction and the direction perpendicular to the paper surface of FIG.

  1 to 3, a vehicle headlamp lamp unit 11 includes a heat sink 12, an LED light source unit 13 mounted on the heat sink 12, a shade 14, and a reflector 15. These are tapped screws 16. And is configured as one lamp unit.

  The heat sink 12 integrally includes a horizontal fixing part 17 for attaching the LED light source part 13, the shade 14 and the reflector 15 in order, and a plurality of plate-like fins 17b suspended from the lower surface of the horizontal fixing part 17. Have.

  As shown in FIG. 1B, the upper surface of the horizontal fixing portion 17 is provided with a light source mounting portion 17a at the center thereof, and the front portion is shown in FIGS. 1A, 2 and 3. As described above, a lens holder 17c to which the projection lens 18 is attached is integrally provided. Further, the LED light source part 13 is fixedly attached to the light source attaching part 17a by an attaching screw 19. In the LED light source unit 13, an LED element 13a as a light source is provided on an optical axis O (see FIG. 1) extending in the vehicle front-rear direction. The LED element 13a generates heat during lighting, but the heat generated in the LED element 13a is radiated through the horizontal fixing part 17 and the fins 17b to which the LED light source part 13 is attached.

  Further, as shown in FIG. 3, the horizontal fixing portion 17 includes a pair of positioning pins 20 protruding leftward and rightward from the horizontal fixing portion 17 on the left and right sides of the light source mounting portion 17a. A mounting hole 21 is formed behind the pin 20.

  The shade 14 shields a part of the reflected light from the reflector 15, that is, removes the upward irradiation light to form a cut-off line of the low beam light distribution pattern. 17 has a shade fixing portion 14a disposed on the top, and a shade portion 14b provided between the LED light source portion 13 and the projection lens 18 depending on the front end portion of the shade fixing portion 14a.

  Further, as shown in detail in FIGS. 4A and 4B, the shade 14 corresponds to the positioning pins 20 and the mounting holes 21 on the left and right sides of the heat sink 12, respectively. A pair of left and right fixed arm portions 23a and 23b extending in the front-rear direction and an arm connecting portion 23c formed by connecting the distal ends of the fixed arm portions 23a and 23b are integrally formed, and are formed in a substantially U shape. Yes. Further, a positioning hole 24 corresponding to the positioning pin 20 of the heat sink 12 and a mounting hole 25 corresponding to the mounting hole 21 are formed in each of the fixed arm portions 23 a and 23 b. The inner diameter of the positioning hole 24 is substantially equal to the outer diameter of the positioning pin 20, and the mounting hole 25 is formed larger than the mounting hole 21.

  Further, of the fixed arm portions 23 a and 23 b, one fixed arm portion 23 a is formed with a long hole extending in the front-rear direction for positioning the reflector 15 as a setting hole 26. The position where the setting hole 26 is provided differs depending on the country and region in which it is used. For example, in the case of Japanese specifications, as shown in FIG. 4 (a), the position closer to the left side than the center of the fixed arm portion 23a. The position, or in the case of the European regional specification, as shown in FIG. 5 (a), the position moved to the right by the distance L1 from the case of Japan, and in the case of the North American regional specification, as shown in FIG. 6 (a) The position is further moved to the right side by a distance L2 than in the case of regional specifications. These are merely examples, and various specifications exist in addition to these specifications. Further, the setting hole 26 may be either a through hole or a hole that is not penetrated, and this example shows the case of a hole that is removed.

  The reflector 15 is provided so as to cover the light source mounting portion 17a of the heat sink 12, and reflects the irradiation light from the LED light source portion 13 toward the front side of the vehicle and directs it toward the projection lens 18 so that the reflector portion 15a has a dome shape. And mounting piece portions 15b and 15c provided so as to extend horizontally outward from the left and right sides of the reflector portion 15a, respectively. And the attachment piece part 15b is arrange | positioned on the fixed arm part 23a of the shade fixing | fixed part 14a, and the attachment piece part 15c is arrange | positioned on the fixed arm part 23b of the shade fixing | fixed part 14a.

  Each of the attachment pieces 15b, 15c of the reflector 15 is provided with an attachment hole 27 corresponding to the attachment hole 21 of the heat sink 12, and a slit 29 extending in the left-right direction corresponding to the positioning pin 20. Is provided. The width of the slit 29 is substantially equal to the outer diameter of the positioning pin 20 and can move in the left-right direction, that is, the vehicle width direction (XL-XR direction) with respect to the reflector 15, but in the front-rear direction (YF-YR direction). It is restricted so that it cannot move. The slit 29 may be formed as a long hole extending in the left-right direction.

  Further, as shown in FIGS. 2 to 4, a reflector positioning protrusion 30 that can be engaged with the shade 14 in the setting hole 26 is provided on the lower surface of the attachment piece 15 b of the reflector 15.

  Next, an assembly procedure of the vehicle headlamp lamp unit 11 configured as described above will be described with reference to FIG.

  First, the shade 14 is made to face the heat sink 12 to which the LED light source unit 13 is attached with the shade portion 14b facing forward, and the positioning hole 24 of the shade fixing portion 14a is engaged with the positioning pin 20 to The positioning of the shade 14 is attempted. As a result, the shade 14 is positioned left / right / front / rear with respect to the heat sink 12, and the shade portion 14b is projected from the reflector 15 between the front side of the shade fixing portion 14a, that is, between the projection lens 18 and the LED light source portion 13. A part of the reflected light directed toward the lens 18 is shielded and disposed at a position where the cut-off line 100 is formed in the low-beam light distribution pattern of Japanese specification shown in FIG. 4C, for example.

  Subsequently, when the reflector 15 faces the shade 14 and the positioning pin 20 of the heat sink 12 is engaged with the slit 29 and the reflector positioning projection 30 is engaged with the setting hole 26 of the shade 14, the reflector 15 is moved to the shade 14. The mounting holes 27 correspond to the mounting holes 21 and 25, respectively. Thereby, positioning of the reflector 15 with respect to the heat sink 12 and the shade 14 is complete | finished.

  Next, when the tapping screw 16 is screwed into the mounting hole 21 from the reflector 15 side through the mounting hole 27 and the mounting hole 25, and the reflector 15 and the shade 14 are fixed to the heat sink 12 by the tapping screw 16, the reflector 15 and the shade are fixed. The vehicle headlamp lamp unit 11 in which the heat sink 12 and the heat sink 12 are integrated is assembled. FIG. 4B shows a state where the reflector 15, the shade 14, and the heat sink 12 are positioned and assembled with each other in this way. Further, the vehicle headlamp lamp unit 11 assembled in this way blocks a part of the reflected light from the reflector 15 toward the projection lens 18 when the LED element 13a is turned on, for example, FIG. As shown in FIG. 5, a low beam light distribution pattern 101 having a cut-off line 100 with the right half lowered downward is specified for Japan.

  The above is the case of the headlamp lamp unit 11 for domestic specifications. In the case of the European region specification, the setting hole 26 is moved to the right by the distance L1 as compared with the case of the shade 14 for domestic specifications. A shade 14 shown in FIG. 5A is used. Then, the positioning hole 24 of the shade fixing portion 14 a is engaged with the positioning pin 20 of the heat sink 12 to position the shade 14 with respect to the heat sink 12.

  Next, when the reflector 15 faces the shade 14 and the positioning pin 20 of the heat sink 12 is engaged with the slit 29 and the reflector positioning projection 30 is engaged with the setting hole 26, the reflector 15 is fixed to the fixed arm portion of the shade 14. The mounting holes 27 correspond to the mounting holes 21 and 25, and the positioning of the reflector 15 with respect to the heat sink 12 and the shade 14 is completed.

  Next, when the tapping screw 16 is screwed into the mounting hole 21 from the reflector 15 side through the mounting hole 27 and the mounting hole 25, and the reflector 15 and the shade 14 are fixed to the heat sink 12 by the tapping screw 16, the reflector 15 and the shade are fixed. The vehicle headlamp lamp unit 11 in which the heat sink 12 and the heat sink 12 are integrated is assembled. FIG. 5B shows a state in which the reflector 15, the shade 14, and the heat sink 12 are positioned and assembled with each other in this way. In addition, the vehicle headlamp lamp unit 11 assembled in this way blocks a part of the reflected light from the reflector 15 toward the projection lens 18 when the LED element 13a is lit, for example, FIG. As shown in FIG. 4, a low beam light distribution pattern 201 having a cut-off line 200 with the left half lowered downward is specified for the European region.

  In the case of North American region specifications, the shade 14 shown in FIG. In the case of the North American region specification, the shade 14 shown in FIG. 6A is used in which a setting hole 26 is provided at a position moved further to the right side by the distance L2 than in the case of the shade 14 for North America region specification. To do. And the positioning hole 24 of the shade fixing | fixed part 14a is engaged with the positioning pin 20 of the heat sink 12, and the positioning of the shade 14 with respect to the heat sink 12 is aimed at.

  Next, when the reflector 15 faces the shade 14, the positioning pin 20 is engaged with the slit 29, and the reflector positioning projection 30 is engaged with the setting hole 26, the reflector 15 is fixed to the fixed arm portions 23a and 23b of the shade 14. The mounting hole 27 corresponds to the mounting hole 21 and the mounting hole 25. Thereby, positioning of the reflector 15 with respect to the heat sink 12 and the shade 14 is complete | finished.

  Next, when the tapping screw 16 is screwed into the mounting hole 21 from the reflector 15 side through the mounting hole 27 and the mounting hole 25, and the reflector 15 and the shade 14 are fixed to the heat sink 12 by the tapping screw 16, the reflector 15 and the shade are fixed. The vehicle headlamp lamp unit 11 in which the heat sink 12 and the heat sink 12 are integrated is assembled. FIG. 6B shows a state where the reflector 15, the shade 14, and the heat sink 12 are positioned and assembled with each other in this way. In addition, the vehicle headlamp lamp unit 11 assembled in this way shields part of the reflected light from the reflector 15 toward the projection lens 18 when the LED element 13a is lit, for example, as shown in FIG. As shown in FIG. 5A, the low beam light distribution pattern 301 of the North American region specification having the cut-off line 300 whose left half is lowered downward is obtained as in the European region specification. The difference between the low beam light distribution pattern 201 for the European region and the low beam distribution pattern 301 for the North American region is that the position where the cut-off line 300 of the low beam light distribution pattern 301 for the North American region falls is the European region specification. The position is shifted to the right by a distance L2 from the position where the cut-off line 200 is lowered.

  Accordingly, in the vehicle headlamp lamp unit 11 configured as described above, the heat sink 12 and the reflector 15 are common regardless of the specifications. If only the shade 14 and the shade 14 for the specifications are prepared, the vehicle for the different specifications is provided. It can be modified to a headlamp unit. That is, the shade 14 provided with different setting holes 26 for each specification is positioned on the heat sink 12 by engaging the positioning holes 24 with the positioning pins 20 of the heat sink 12, and then the reflector positioning protrusions 30 are set in the setting holes 26. When the reflector 15 is arranged on the shade 14 by being engaged, the reflector 15 is attached at a position according to the specification with the shade 14 as a reference, and the vehicle headlamp lamp unit 11 according to the specification is formed. Therefore, the heat sink 12 and the reflector 15 can be used in common, and the lamp specifications can be easily modified by simply replacing the shade. As a result, the number of components to be managed is reduced and the cost can be reduced.

  Note that the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within a scope in which the object of the present invention can be achieved are included in the present invention.

DESCRIPTION OF SYMBOLS 11 Vehicle headlamp lamp unit 12 Heat sink 13 LED light source part 13a LED element 14 Shade 14a Shade fixing part 14b Shade part 15 Reflector 16 Tapping screw 17 Horizontal fixing part 17a Light source mounting part 17b Fin 17c Lens holder 18 Projection lens 19 Mounting screw 20 Positioning pin 21 Mounting hole 23a, 23b Fixed arm portion 23c Arm connecting portion 24 Positioning hole 25 Mounting hole 26 Setting hole 27 Mounting hole 29 Slit 30 Reflector positioning protrusion

Claims (2)

A projection lens disposed on an optical axis extending in the vehicle longitudinal direction;
An LED light source,
A heat sink for dissipating heat generated in the LED light source unit;
A reflector that reflects light from the LED light source unit toward the front of the vehicle;
A shade that is arranged between the projection lens and the LED light source unit and shields part of the reflected light from the reflector to form a cut-off line of a light distribution pattern;
A pair of left and right positioning pins provided on the heat sink;
A pair of left and right positioning holes provided in the shade and respectively engaged and positioned by the positioning pins;
A setting hole provided in the shade for distinguishing specifications of the shade;
A pair of left and right slits provided on the reflector and respectively engaged with the positioning pins so as to be movable in a vehicle width direction intersecting the optical axis substantially perpendicular to the optical axis with respect to the shade;
A reflector positioning protrusion provided on the reflector and engaged and positioned in the setting hole;
A vehicle headlamp lamp unit comprising:   2. The vehicle front according to claim 1, wherein the heat sink, the reflector, and the shade are provided with attachment holes for attaching and fixing attachment screws in common at positions facing each other. Lamp unit for lighting.

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