JP2013054834A - Automotive headlamp - Google Patents

Automotive headlamp Download PDF

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Publication number
JP2013054834A
JP2013054834A JP2011190377A JP2011190377A JP2013054834A JP 2013054834 A JP2013054834 A JP 2013054834A JP 2011190377 A JP2011190377 A JP 2011190377A JP 2011190377 A JP2011190377 A JP 2011190377A JP 2013054834 A JP2013054834 A JP 2013054834A
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Prior art keywords
lamp
light source
bracket
source unit
light emitting
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JP2011190377A
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Japanese (ja)
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JP5806053B2 (en
Inventor
Tatsuhiko Yamamichi
龍彦 山道
Shigeyuki Watanabe
重之 渡邉
Takashi Inoue
貴司 井上
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Koito Mfg Co Ltd
株式会社小糸製作所
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Abstract

An object of the present invention is to easily replace a semiconductor light emitting element 31.
A lamp body 12 having an opening on the front side of a lamp, a cover 13 covering the opening, a bracket 15 disposed in a lamp chamber formed by the lamp body 12 and the cover 13 and attached to the lamp body 12. A light source unit 30 having a semiconductor light emitting element 31 that is a light source, and an optical unit 20 that emits light from the semiconductor light emitting element 31 to the front of a lamp. The light source unit 30 and the optical unit 20 include: Both are arranged in the lamp chamber and are separately fixed to the bracket 15, and the light source unit 30 is detachable through an attachment / detachment opening 18 provided on the rear side of the lamp body 12. This is achieved by the vehicle headlamps 1, 2, and 3.
[Selection] Figure 1

Description

  The present invention relates to a vehicle headlamp, and more particularly to a vehicle headlamp using a semiconductor light emitting element such as an LED as a light source.
  In recent years, various vehicle headlamps using semiconductor light emitting elements as light sources have been proposed. In general, such a vehicle headlamp uses an LED (Light Emitting Diode) as a semiconductor light emitting element, but the LED may be damaged due to an overcurrent or deteriorate in performance due to use in a high humidity environment. . Therefore, the vehicle headlamp is required to have a structure in which the LED can be easily replaced in such a case. For example, Patent Document 1 discloses an LED light source headlamp in which a unit composed of a base plate, an LED lamp, and a reflecting mirror can be attached and detached from the rear side of the housing.
Japanese Patent No. 4582791
  However, in the LED light source head lamp disclosed in Patent Document 1, when the LED lamp is removed together with the unit, the reflecting mirrors covering the upper side and the side of the LED lamp are also removed. Therefore, in order to replace the LED lamp, it is necessary to further remove the reflecting mirror. Therefore, the replacement operation for exchanging only the LED lamp is complicated.
  Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide a vehicle headlamp that can easily replace only a semiconductor light emitting element that is a light source or only a light source unit that has a semiconductor light emitting element that is a light source. It is.
The above object of the present invention is to provide a lamp body having an opening on the front side of the lamp,
A cover covering the opening;
A bracket disposed in a lamp chamber formed by the lamp body and the cover, and attached to the lamp body;
A light source unit having a semiconductor light emitting element as a light source;
An optical unit that emits light from the semiconductor light emitting element to the front of the lamp;
With
The light source unit and the optical unit are both arranged in the lamp chamber and separately fixed to the bracket, and the light source unit can be attached and detached through an attachment / detachment opening provided on the rear side of the lamp body of the lamp body. This is achieved by a vehicular headlamp characterized by the above.
  According to the vehicle headlamp configured as described above, when the semiconductor light emitting element needs to be replaced, it is possible to remove only the light source unit separately from the optical unit without removing the cover in front of the lamp. As a result, the semiconductor light emitting element can be easily replaced. Further, since both the light source unit and the optical unit are fixed to the bracket, the aiming of the lamp can be performed by adjusting the mounting angle of the bracket with respect to the lamp body.
Further, the bracket in the vehicle headlamp having the above configuration has an opening that penetrates in the lamp front-rear direction,
The light source unit is preferably fixed to the rear side of the lamp of the bracket so that the light from the semiconductor light emitting element passes through the opening through the optical unit and is emitted to the front side of the lamp. .
  According to the vehicle headlamp having such a configuration, since the light source unit is fixed to the rear side of the lamp of the bracket, the bracket is not obstructed in the replacement operation of the light source unit, and the replacement operation can be easily performed. it can.
In place of this, the bracket in the vehicle headlamp having the above configuration has an opening that penetrates in the front-rear direction of the lamp,
In the light source unit, a part of the light source unit including the semiconductor light emitting element may be disposed on the inner side of the opening or on the front side of the lamp than the opening, and may be fixed on the rear side of the lamp of the bracket. Good.
  Even with the vehicle headlamp having such a configuration, since the light source unit is fixed to the rear side of the lamp of the bracket, the bracket is not obstructed in the replacement work of the light source unit, and the replacement work can be easily performed. .
  In the vehicular headlamp configured as described above, the light source unit preferably includes a circuit board on which the semiconductor light emitting element is mounted and a control circuit for the semiconductor light emitting element is provided.
  According to the vehicle headlamp having such a configuration, even when it is necessary to replace not only the semiconductor light emitting element but also the circuit board due to a failure of the control circuit, it is replaced by removing the light source unit from the rear side of the lamp. be able to.
  Moreover, it is preferable that the bracket in the vehicle headlamp having the above-described configuration is provided with a positioning portion that positions the light source unit at a fixed position of the light source unit.
  According to the vehicle headlamp having such a configuration, even when the light source unit is detached from the bracket for replacement of the semiconductor light emitting element or the like, the light source unit is not shifted to the fixed position when the light source unit is attached to the bracket again. Hard to occur.
It is a schematic sectional drawing of the vehicle headlamp which concerns on an example of embodiment of this invention. It is a schematic sectional drawing which shows the state which removed the optical unit from the bracket of the vehicle headlamp shown in FIG. 1, and took out out of the lamp chamber. It is a schematic sectional drawing of the vehicle headlamp which concerns on another example of embodiment of this invention. It is a schematic sectional drawing which shows the state which removed the optical unit from the bracket of the vehicle headlamp shown in FIG. 3, and took out out of the lamp chamber. It is a schematic sectional drawing of the vehicle headlamp which concerns on another example of embodiment of this invention. It is a schematic sectional drawing which shows the state which removed the optical unit from the bracket of the vehicle headlamp shown in FIG. 5, and took out out of the lamp chamber.
  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
  FIG. 1 is a schematic cross-sectional view of a vehicle headlamp 1 according to an example of an embodiment of the present invention. A vehicle headlamp 1 according to the present embodiment is a lamp that is attached to, for example, a front end portion of a vehicle and can turn on and off a low beam, and the lamp body 12 that opens on the front side of the lamp and the above-described opening in the lamp body 12 And a bracket 15 disposed in a lamp chamber formed by the lamp body 12 and the cover 13, an optical unit 20, and a light source unit 30.
  The bracket 15 is a plate-like member, and is attached to the lamp body 12 via the aiming mechanism 5 and the leveling mechanism 7 so that the surface direction thereof is substantially orthogonal to the lamp front-rear direction. The bracket 15 is provided with an opening 16 penetrating in the front-rear direction of the lamp.
  The aiming mechanism 5 is a mechanism for finely adjusting the mounting position and the mounting angle of a later-described optical unit 20 and the light source unit 30 attached to the bracket 15 and the bracket 15 by adjusting the tightening by the aiming nut 6. At the stage of aiming adjustment, the lamp optical axis Ax is substantially parallel to the vehicle longitudinal direction. The leveling mechanism 7 is a mechanism for automatically adjusting the irradiation direction of the light source light by the optical unit 20 and the light source unit 30 by driving the leveling motor 8 in accordance with a change in the weight of the number of passengers or cargo mounted on the vehicle. is there.
  The light source unit 30 is a light source of the vehicle headlamp 1 and is a circuit provided with a semiconductor light emitting element 31 disposed on the lamp optical axis Ax and a control circuit for controlling the lighting state of the semiconductor light emitting element 31. The board 32 includes a heat sink 33 disposed below the circuit board 32 to hold and fix the circuit board 32, and a heat radiating fan 34 disposed below the heat sink 33 and held to the heat sink 33. In this example, the semiconductor light emitting element 31 is an LED element whose upper surface is a light emitting surface, and one or a plurality of chips packaged according to the required light amount is preferably used.
  The heat sink 33 is formed of, for example, a metal material having excellent thermal conductivity such as an aluminum alloy, and a plurality of heat radiating fins (not shown) are used to efficiently radiate heat generated from the semiconductor light emitting element 31 and the circuit board 32. ) Is provided. The heat released from the heat sink 33 is diffused by the air flow generated by the heat dissipation fan 34.
  The optical unit 20 is provided to emit the light from the semiconductor light emitting element 31 to the front of the lamp, the reflector 23 for reflecting the light emitted from the semiconductor light emitting element 31 to the front of the lamp, and the semiconductor light emission. The projection lens 21 projects the direct light from the element 31 and the reflected light from the reflector 23 to the front of the lamp, and the lens holder 22 that supports and fixes the projection lens 21.
  The reflector 23 is a substantially dome-like member whose inner surface shape in the vertical cross section is an ellipse. In the cross section shown in FIG. 1, the inner surface shape of the reflector 23 has a first focal point at a position indicated by “Fa”. And a part of an ellipse having a second focal point at the position indicated by “Fb”. The projection lens 21 is a plano-convex lens in which the front surface of the lamp is an elliptical convex surface and the rear surface is a flat surface. The projection lens 21 has a rear focal point that substantially coincides with Fb, which is the second focal point of the inner surface of the reflector 23, and projects the image on the focal plane including the rear focal point forward while enlarging it as a reverse image in the horizontal direction. .
  In the present embodiment, the light source unit 30 and the optical unit 20 are separately fixed to the bracket 15, respectively. In particular, in this example, the light source unit 30 is fixed to the surface 15 b of the bracket 15 on the rear side of the lamp. The optical unit 20 is fixed to the surface 15a of the bracket 15 on the front side of the lamp. The method for fixing the light source unit 30 and the optical unit 20 to the bracket 15 is not particularly limited. Particularly, the light source unit 30 can be attached and detached through the attachment / detachment opening 18 when the attachment / detachment opening 18 described later is opened. It is preferable to be fixed to the bracket 15 by a method such as screwing so that
  In the vehicle headlamp 1 of the present example, the light source unit 30 and the optical unit 20 are fixed to the front and rear surfaces 15a and 15b of the lamp as shown in FIG. The semiconductor light emitting element 31 is disposed so as to cover the upper portion, and is disposed at a position substantially coincident with the first focal point Fa on the inner surface of the reflector 23. Therefore, the light emitted upward from the semiconductor light emitting element 31 is reflected near the lamp optical axis Ax on the inner surface of the reflector 23, passes through the opening 16 provided in the bracket 15, and is also the rear focal point of the projection lens 21. Condensed in the vicinity of the bifocal point Fb.
  The reflected light is projected forward of the lamp by the projection lens 21 together with direct light from the semiconductor light emitting element 31. In this example, the edge 15c on the lower end side of the opening 16 in the bracket 15 serves as a shade that blocks direct light from the semiconductor light emitting element 31 and part of the reflected light in order to form a predetermined light distribution pattern. Function. Therefore, for example, compared with the case where the shade is attached to the bracket 15 as a separate part, the number of parts can be reduced, and the error of the attachment position of the shade with respect to the bracket 15 is eliminated, so that the dimensional error associated with the assembly of the entire lamp is reduced. Can do.
  By the way, in this example, the attachment / detachment opening 18 is provided on the lamp body 12 on the rear side of the lamp. The opening 18 for attachment / detachment is normally closed by a lid 19, but when it is necessary to remove the light source unit 30 from the bracket 15 for replacement work of the semiconductor light emitting element 31, as shown in FIG. 2. The light source unit 30 can be removed from the bracket 15 and taken out of the lamp chamber from the rear side of the lamp by removing the lid 19 from the attachment / detachment opening 18.
  Further, when the light source unit 30 is removed from the bracket 15, the optical unit 20 and the bracket 15 do not get in the way, so that the light source unit 30 can be removed while they are mounted in the lamp chamber. . Therefore, not only can the number of work steps required for the removal work of the light source unit 30 be reduced, but the work is extremely easy as compared with the embodiment in which the cover 13 is removed and the light source unit 30 is attached and detached from the front side of the lamp.
  Further, since the projection lens 21 and the reflector 23 are all configured of the optical unit 20, the semiconductor light emitting element 31 is exposed on the surface of the extracted light source unit 30. Therefore, the replacement work of the semiconductor light emitting element 31 is facilitated as compared with a mode in which a reflector or the like needs to be further removed from the removed light source unit. Although explanation and illustration are omitted, it is desirable that the semiconductor light emitting element 31 is fixed to the light source unit 30 by a method that is easy to attach and detach, such as holding an electrode with an attachment.
  In this example, since the circuit board 32 is attached to the upper surface of the light source unit 30, the light source unit 30 can be removed from the rear side of the lamp in the event of a failure of the control circuit provided on the circuit board 32. The circuit board 32 can be easily replaced. In this example, a positioning projection 15 d that is an example of a positioning portion that indicates a fixing position (attachment position) of the light source unit 30 to the bracket 15 is provided on the surface 15 b of the bracket 15 on the rear side of the lamp. Therefore, for example, even when the attachment and removal of the light source unit 30 are repeated, the attachment position of the light source unit 30 with respect to the bracket 15 is unlikely to occur.
  FIG. 3 is a schematic cross-sectional view of a vehicle headlamp 2 according to another example of the embodiment of the present invention. In the vehicle headlamp 2 of the present example, the same components as those in the vehicle headlamp 1 described above are denoted by the same reference numerals, and the description thereof is omitted as appropriate.
  In the vehicle headlamp 2 of this example, a part of the heat sink 33 in the light source unit 30 extends to the front side of the lamp from the bracket 15 through the opening 16, and the semiconductor light emitting element 31 and A circuit board 32 is arranged. Therefore, in this example, a part of the light source unit 30 is disposed on the front side of the lamp with respect to the bracket 15, but the vehicle described above in that the light source unit 30 is fixed to the surface 15 b on the rear side of the lamp of the bracket 15. This is the same as the headlamp 1 for use.
  Therefore, as shown in FIG. 4, the light source unit 30 can be removed from the bracket 15 and taken out of the lamp chamber without removing the bracket 15 and the optical unit 20 by the same method as that for the vehicle headlamp 1 described above. Therefore, also in the vehicle headlamp 2 of this example, the number of work steps required for the removal work of the light source unit 30 can be reduced, and the removal work itself is extremely easy.
  In the case of this example, as shown in FIG. 3, the lower surface of the extending portion of the heat sink 33 contacts the edge 15 c of the bracket 15 and the upper surface of the lens holder 22, and the front surface of the heat sink 33 is behind the lamp 15 of the bracket 15. Abuts against the side surface 15b. Therefore, the mounting position of the light source unit 30 with respect to the bracket 15 and the optical unit 20 is determined at least in the lamp front-rear direction and the lamp vertical direction. Therefore, unlike the vehicle headlamp 1 described above, there is no need to provide a positioning portion that indicates the mounting position of the light source unit 30 with respect to the bracket 15, and the number of parts and the number of processing steps for parts can be reduced.
  FIG. 5 is a schematic cross-sectional view of a vehicle headlamp 3 according to still another example of the embodiment of the present invention. In the vehicle headlamp 3 of the present example, the same components as those of the vehicle headlamp 1 or the vehicle headlamp 2 described above are denoted by the same reference numerals, and the description thereof is omitted as appropriate.
  In the vehicle headlamp 3 of this example, a flange portion 33 a extending in the vertical direction is provided on the heat sink 33 of the light source unit 30, and this flange portion 33 a is located on the rear side from the lamp rear side surface 15 b of the bracket 15. The light source unit 30 is fixed to the bracket 15 by being screwed to the boss 17 projecting to the bracket 15. In this example, the rear end 33 b of the heat sink 33 is exposed to the outside of the lamp chamber through the opening of the lid 19 provided with an opening having a size substantially equal to the outer diameter of the heat sink 33.
  Therefore, in this example, the heat generated from the semiconductor light emitting element 31 and the circuit board 32 can be efficiently radiated to the outside of the lamp chamber, so that the heat sink as in the vehicle headlamp 1 and the vehicle headlamp 2 described above. In order to improve the heat dissipation efficiency from 33, it is not necessary to provide the heat dissipation fan 34.
  Further, in this example, as shown in FIG. 5, the front surface of the flange portion 33 a of the heat sink 33 abuts on the rear end portion of the boss 17 protruding rearward from the bracket 15, and the outer peripheral surface of the heat sink 33 is the lid 19. It is in contact with the opening surface. Therefore, the mounting position of the light source unit 30 with respect to the bracket 15 is determined at least in the lamp front-rear direction and the lamp vertical direction. Therefore, unlike the vehicle headlamp 1 described above, there is no need to provide a positioning portion that indicates the mounting position of the light source unit 30 with respect to the bracket 15, and the number of parts and the number of processing steps for parts can be reduced.
  Also in this example, as shown in FIG. 6, the light source can be removed without removing the bracket 15 and the optical unit 20 by removing the lid 19 in the same manner as the vehicle headlamp 1 and the vehicle headlamp 2 described above. The unit 30 can be removed from the bracket 15 and taken out of the lamp chamber. Therefore, also in the vehicle headlamp 3 of this example, the number of work steps required for the removal work of the light source unit 30 can be reduced, and the removal work itself is very easy.
  Although the present invention has been described above with reference to preferred embodiments and modifications thereof, the technical scope of the present invention is not limited to the scope described in the above embodiments and modifications thereof. It will be apparent to those skilled in the art that various modifications or improvements can be made to the above-described embodiment and its variations as long as the technical features are not impaired.
1, 2 and 3 Vehicle headlight 5 Aiming mechanism 6 Aiming nut 7 Leveling mechanism 8 Leveling motor 12 Lamp body 13 Cover 14 Light chamber 15 Bracket 16 Opening portion 17 Boss 18 Removable opening 19 Lid 20 Optical unit 21 Projection lens 22 Lens holder 23 Reflector 30 Light source unit 31 Semiconductor light emitting element 32 Circuit board 33 Heat sink 34 Heat dissipation fan 40 Socket cover

Claims (5)

  1. A lamp body whose front side is open,
    A cover covering the opening;
    A bracket disposed in a lamp chamber formed by the lamp body and the cover, and attached to the lamp body;
    A light source unit having a semiconductor light emitting element as a light source;
    An optical unit that emits light from the semiconductor light emitting element to the front of the lamp;
    With
    The light source unit and the optical unit are both arranged in the lamp chamber and separately fixed to the bracket, and the light source unit can be attached and detached through an attachment / detachment opening provided on the rear side of the lamp body of the lamp body. A vehicle headlamp characterized by the above.
  2. The bracket has an opening penetrating in the front-rear direction of the lamp,
    The light source unit is fixed to the rear side of the lamp of the bracket so that light from the semiconductor light emitting element passes through the opening through the optical unit and is emitted to the front side of the lamp. The vehicle headlamp according to claim 1.
  3. The bracket has an opening penetrating in the front-rear direction of the lamp,
    In the light source unit, a part of the light source unit including the semiconductor light emitting element is disposed on the inner side of the opening or on the front side of the lamp with respect to the opening, and is fixed on the rear side of the lamp of the bracket. The vehicle headlamp according to claim 1.
  4.   The vehicle light source according to any one of claims 1 to 3, wherein the light source unit includes a circuit board on which the semiconductor light emitting element is mounted and a control circuit for the semiconductor light emitting element is provided. Lighting.
  5. The vehicle headlamp according to any one of claims 1 to 4, wherein the bracket is provided with a positioning portion for positioning the light source unit at a fixed position of the light source unit.
JP2011190377A 2011-09-01 2011-09-01 Vehicle headlamp Active JP5806053B2 (en)

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Application Number Priority Date Filing Date Title
JP2011190377A JP5806053B2 (en) 2011-09-01 2011-09-01 Vehicle headlamp
CN201210320728.3A CN102966898B (en) 2011-09-01 2012-08-31 Headlight for automobile

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JP5806053B2 JP5806053B2 (en) 2015-11-10

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014229361A (en) * 2013-05-17 2014-12-08 株式会社小糸製作所 Vehicular lighting fixture
JP2015002021A (en) * 2013-06-13 2015-01-05 株式会社小糸製作所 Lighting device and spare component
JP2015099656A (en) * 2013-11-18 2015-05-28 市光工業株式会社 Vehicle lamp
WO2021010270A1 (en) * 2019-07-12 2021-01-21 株式会社小糸製作所 Aircraft lamp

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6345052B2 (en) * 2013-12-20 2018-06-20 株式会社小糸製作所 Vehicle headlamp
KR102029062B1 (en) * 2018-04-27 2019-11-08 주식회사 에이엠에스 Head lamp for vehicle using liquid crystal on silicon panel

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JP2007207528A (en) * 2006-01-31 2007-08-16 Koito Mfg Co Ltd Vehicular headlight
JP2010238604A (en) * 2009-03-31 2010-10-21 Koito Mfg Co Ltd Light-emitting element modularization member and lighting fixture unit
JP4582791B2 (en) * 2005-08-24 2010-11-17 スタンレー電気株式会社 LED light source headlamp
JP2011081967A (en) * 2009-10-05 2011-04-21 Koito Mfg Co Ltd Vehicle headlamp
JP2011108382A (en) * 2009-11-13 2011-06-02 Koito Mfg Co Ltd Lamp tool for vehicle

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Publication number Priority date Publication date Assignee Title
JP4053489B2 (en) * 2003-11-04 2008-02-27 株式会社小糸製作所 Vehicle headlamp
JP2008123856A (en) * 2006-11-13 2008-05-29 Koito Mfg Co Ltd Vehicular lamp
JP5160992B2 (en) * 2008-07-24 2013-03-13 株式会社小糸製作所 Vehicle lighting

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Publication number Priority date Publication date Assignee Title
JP4582791B2 (en) * 2005-08-24 2010-11-17 スタンレー電気株式会社 LED light source headlamp
JP2007207528A (en) * 2006-01-31 2007-08-16 Koito Mfg Co Ltd Vehicular headlight
JP2010238604A (en) * 2009-03-31 2010-10-21 Koito Mfg Co Ltd Light-emitting element modularization member and lighting fixture unit
JP2011081967A (en) * 2009-10-05 2011-04-21 Koito Mfg Co Ltd Vehicle headlamp
JP2011108382A (en) * 2009-11-13 2011-06-02 Koito Mfg Co Ltd Lamp tool for vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014229361A (en) * 2013-05-17 2014-12-08 株式会社小糸製作所 Vehicular lighting fixture
US9664350B2 (en) 2013-05-17 2017-05-30 Koito Manufacturing Co., Ltd. Vehicle lamp
JP2015002021A (en) * 2013-06-13 2015-01-05 株式会社小糸製作所 Lighting device and spare component
JP2015099656A (en) * 2013-11-18 2015-05-28 市光工業株式会社 Vehicle lamp
WO2021010270A1 (en) * 2019-07-12 2021-01-21 株式会社小糸製作所 Aircraft lamp

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CN102966898A (en) 2013-03-13
JP5806053B2 (en) 2015-11-10

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