JP2007048727A - Light emitting diode unit - Google Patents

Light emitting diode unit Download PDF

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Publication number
JP2007048727A
JP2007048727A JP2005254093A JP2005254093A JP2007048727A JP 2007048727 A JP2007048727 A JP 2007048727A JP 2005254093 A JP2005254093 A JP 2005254093A JP 2005254093 A JP2005254093 A JP 2005254093A JP 2007048727 A JP2007048727 A JP 2007048727A
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Japan
Prior art keywords
heat sink
emitting diode
light emitting
flange
light
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Pending
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JP2005254093A
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Japanese (ja)
Inventor
Toshihide Nakano
俊秀 中野
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3Force:Kk
株式会社スリーフォース
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Priority to JP2005254093A priority Critical patent/JP2007048727A/en
Publication of JP2007048727A publication Critical patent/JP2007048727A/en
Application status is Pending legal-status Critical

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source unit which has a high radiation and has a matching color tone with an HID bulb. <P>SOLUTION: A light emitting diode unit is provided with a light emitting diode 10 with a heat radiating part, a heat sink 20 of a cylindrical metal part on which a plurality of grooves are cut, and a flange 40 having an engaging part which engages with a light housing of a vehicle body and an opening mouth part opened facing the above light housing. One end of the above heat sink 20 is engaged with the above opening mouth of the flange 40 and the radiating part of the above light emitting diode 10 is made to adhere to the upper end surface of the heat sink 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a light-emitting diode unit, and more particularly to a technique related to a light source unit including a high-luminance light-emitting diode.

  Various light sources are used in cars, and a typical example is a headlight that is lit for the purpose of heading when driving at night. Conventionally, halogen bulbs are used as light sources for headlights, but headlights are required to be bright in terms of function, and in recent years, HID bulbs (HIGH INTERNITY DISCHARG) instead of halogen bulbs are often used. It seems to be. HID bulbs have higher brightness and lower power consumption than halogen bulbs, and their price has been decreasing, so in recent years, they have come to be adopted as a standard in a wide range of vehicles.

On the other hand, as a light source of an automobile, there is a fog lamp that is turned on for the purpose of ensuring visibility in bad weather in addition to a headlight. Conventional fog lamps are known in which the light distribution of the traveling beam and the fog lamp is optimized as in the fog lamp described in Patent Document 1, for example. Therefore, a halogen bulb is still used as the light source.
JP 2002-170408 A

  By the way, in recent years, fog lamps are often turned on for the purpose of improving the fashionability of a car or appealing the existence of the own vehicle.

  However, the light color of the halogen bulb used in the fog lamp is yellowish, whereas the HID bulb is very white. Therefore, when the HID bulb is used as a headlight, The difference between the color of the light and the color of the fog lamp has increased, and the appearance balance has become very poor.

  In this regard, it is conceivable to use an HID bulb for the fog lamp itself. However, when the fog lamp is made into HID, it is necessary to mount a very expensive unit such as a ballast or a starter. Since the shapes are completely different, it is not possible to simply change the valve, and its replacement is very time-consuming.

  Further, in order to match the light shade between the fog lamp and the HID headlight, it is conceivable to use a light emitting diode (LED) as a light source of the fog lamp, but a normal LED has a strong whiteness but a very small amount of light. Since the difference in the amount of light from the HID bulb is too large, it is not suitable for use as a light source for a fog lamp. Further, since the amount of heat generated by the LED is very large, the light source unit becomes relatively large.

  The present invention has been made to solve the above-described conventional problems, and provides a light-emitting diode unit that has high brightness, high whiteness, can be easily replaced with an existing light source bulb, and has excellent heat dissipation. With the goal.

  In order to solve the above-mentioned problems, a light emitting diode unit according to claim 1 of the present invention relates to a light emitting diode having a heat radiating member, a heat sink in which a plurality of grooves are cut on a side surface of a columnar metal member, and a vehicle body. A flange having at least an engaging portion for stopping, and the heat sink has a flange so that an upper surface of the heat sink projects into a light housing of the vehicle body when the flange is locked to the vehicle body. The light emitting diode is adhered to the upper surface of the heat sink so that the heat radiating member of the light emitting diode and the upper surface of the heat sink are in close contact with each other.

  The light emitting diode unit according to claim 2 of the present invention is the light emitting diode unit according to claim 1, wherein the flange faces the light housing when the flange is locked to the vehicle body. It has an open bottomed opening having a circular cross section, and the heat sink is made of a solid aluminum column having a diameter substantially the same as the diameter of the opening.

  The light-emitting diode unit according to claim 3 of the present invention is the light-emitting diode unit according to claim 2, wherein the heat sink has twelve grooves in the longitudinal direction of the heat sink at an equal width. It is characterized by being cut by

  According to the light emitting diode unit according to claim 1 of the present invention, it is possible to easily mount the light source unit excellent in heat dissipation and in color with the HID bulb without performing special processing on the vehicle body side. It becomes possible.

  Further, according to the light emitting diode unit according to claim 2 of the present invention, it is possible to use the existing flange for the halogen bulb, and the existing light source unit locking member without performing special processing on the vehicle body side. It becomes possible to attach easily using the.

  Further, according to the light emitting diode unit according to claim 3 of the present invention, the heat generated by the LED can be efficiently radiated and cooled, and the safety can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1A to FIG. 1E are diagrams illustrating the entire configuration of an LED unit 100 according to the present invention. FIG. 1A is a right side view of the LED unit 100, and FIG. 1 is a front view, FIG. 1C is a rear view, FIG. 1D is a plan view, and FIG. 1D is a bottom view. In FIG. 1 (a) to FIG. 1 (e), the same components are denoted by the same reference numerals.

  As shown in FIG. 1A, the LED unit 100 according to the first embodiment includes a light emitting diode (LED) 10, a protective cap 20, a heat sink 30, and a flange 40. Hereinafter, a detailed configuration of the LED unit 100 will be described with reference to FIGS. 1 (a) to 1 (e).

  In FIG. 1A, an LED 10 forms a light emitting portion of the LED unit 100, and a high output type with a rated power of 5 W is used. High power type LEDs are usually provided with a heat dissipation measure. In the first embodiment, a high power type LED in which a metal member for heat dissipation is exposed on the bottom surface of the LED is used. Cables 11a and 11b are connected to the LED 10, and power is supplied via the cables 11a and 11b. As shown in FIGS. 1 (a) and 1 (b), in the first embodiment, the cables 11a and 11b are disposed along the side surface of the heat sink 30, and therefore heat resistant ones are used. It is preferable to do this.

  The protective cap 20 prevents the LED 10 from being damaged, and is extracted and formed into a hemispherical dome shape using a polycarbonate resin. A cutout portion (not shown) for wiring the cables 11a and 11b is provided at the end edge portion of the protective cap 20.

  The heat sink 30 diffuses heat generated by the light emission of the LED 10 and is formed by grooving a side surface of a columnar metal material having a flat upper surface and a lower surface. The heat sink 30 may be made of a metal having a high thermal conductivity, and iron, copper, or the like can be used. The shape of the heat sink 30 is at least the LED 10 such as a prismatic or cylindrical member. Any columnar member having a flat surface on its upper surface may be used. In the first embodiment, a columnar aluminum member is used from the viewpoints of workability and thermal conductivity. Details of the heat sink 30 will be described later.

  The flange 40 fixes the LED unit 100 to the vehicle body. The vehicle body is usually provided with a locking mechanism for fixing a light source of a headlight or a fog lamp. Such a locking mechanism takes various forms depending on the vehicle type, year, etc., but the flange 40 only needs to have an engaging portion that can be engaged with any of these locking mechanisms. In the first embodiment, the same shape as the HB4 type flange shown in FIGS. 1A to 1E, which is currently used for a halogen bulb, is used.

The flange 40 is provided with a claw portion indicated by 40a in FIG. 1B, a connector portion indicated by 40b, and a lid portion indicated by 40c in FIG. 1C. The connector portion 40b is a portion that is coupled to a connector connected to a power supply line on the vehicle body side, and is provided with two connection terminals 40d as shown in FIG. The terminal 40d is fitted to the hollow area provided inside the flange 40, and the hollow area is covered by the lid portion 40c. The claw portion 40a engages with a guide groove provided on the vehicle main body side, and fixes the vehicle main body and the LED unit 100 to the vehicle main body.
Further, the flange 40 has an opening (not shown) that opens toward the light housing of the vehicle when the flange 40 is fixed to the vehicle body, and the heat sink 30 is fitted into the opening. ing.

  If the flange 40 is an existing one having an opening for fixing the light source bulb, such as H3 type, HB3 type, HB4 type, etc., currently defined as a flange type for halogen bulbs, It can be used as it is. By using these existing flanges in the present invention, the LED unit 100 can be easily created, and the LED light emitting unit 100 according to the present invention can be easily attached to the vehicle body without any special processing on the vehicle side. It can be fixed.

  Next, the detailed structure of the heat sink 30 is demonstrated using FIG. 2 (a) thru | or (c).

  2A is a right side view of the heat sink 30, FIG. 2B is a plan view, and FIG. 2C is a front view. As described above, the heat sink 30 is formed by cutting an aluminum column material, and as shown in FIG. 1, an LED support base 31, a heat radiating portion 32, and a positioning portion 33 are formed.

  The LED support base 31 is cut into a cylindrical shape concentrically with the parent body of the heat sink 30, and the LED 10 is bonded to the upper surface of the LED support base 31, and the protective cap 20 is placed so as to abut against the extended portion. The LED support base 31 may have a diameter larger than that of the heat sink of the LED 10, and the LED support base 31 may have any height. In the first embodiment, the protective cap 20 is fixed to the LED support base 31 by using an adhesive. However, a concave portion is provided on the outer peripheral face of the LED support base 31 and the inner peripheral face of the protective cap. A convex portion may be provided on the protective cap, and the protective cap may be fitted and fixed using the elasticity of the protective cap.

  The heat radiating portion 32 is subjected to grooving so that a plurality of groove portions 34 as shown in FIG. 2C are formed on the surface of the aluminum columnar material cut out to a desired length. The number, interval, width, and depth of the grooves 34 formed in the heat radiating portion 32 can be arbitrarily determined in consideration of heat radiating properties and strength.

  The cutting direction of the groove 34 is arbitrary, and in the first embodiment, as shown in FIGS. 2A and 2B, the cutting is performed in the longitudinal direction of the heat sink 30, but not limited thereto, A plurality of cuts may be made so that a ring shape is formed in the short direction of the heat sink 30, or a groove may be cut spirally on the side surface of the heat sink 30.

  In order to perform positioning within the flange 40, the positioning portion 33 cuts the lower end of the aluminum member cut out to a desired length into a shape that can be engaged with a positioning convex member provided inside the opening of the flange 40. Take out and form. In the first embodiment, as shown in FIGS. 2A and 2B, the lower end of the aluminum member is cut out so that two planes are formed in parallel.

  In addition, it is preferable that the outer diameter of the heat sink 30 is substantially the same shape as the outer edge shape of the opening of the flange 40 to be used. In the first embodiment, the opening of the flange has a circular cross section, and the outer edge of the opening has a circular shape. Therefore, an aluminum cylindrical member having substantially the same diameter as the circular shape may be used. Further, the length of the heat sink 30 is such that when the LED unit 100 is fixed to the vehicle body, the inner wall surface of the light housing and the LED 10 do not interfere with each other, and the LED 10 can protrude into the light housing. It can be of any length.

  Further, the LED support base 31 and the positioning portion 33 are not necessarily provided on the heat sink 30. For example, the heat dissipation part 32 may be formed by grooving a surface other than the upper and lower surfaces of a cylindrical aluminum material, and the LED 10 may be directly bonded to the upper surface.

Next, a method for creating the LED unit 100 according to the first embodiment will be described.
First, a solid aluminum material having a diameter of 14 mm is cut into a length of 28 mm to obtain a cylindrical aluminum piece. Next, a region 3 mm high from one end of the aluminum piece is cut, and a column shape of 3 mm in height and 9 mm in diameter and concentric with the aluminum piece is cut out to form the LED support base 31. Next, the end portion of the aluminum piece opposite to the end portion on which the LED support base 31 is formed is cut to form the positioning portion 33.

  Then, using a laser, twelve groove portions having a width of 2 mm and a depth of 2 mm are cut at equal widths in the longitudinal direction of the surface of the LED support base 31 of the aluminum piece and the region other than the LED support base 31. Thus, the heat sink 30 is obtained.

  Next, heat-resistant cables 11a and 11b made of Teflon were soldered to the terminals of the LED 10, and the LED 10 and the LED support base 31 were provided on the bottom surface of the LED 10 using a heat-dissipating adhesive, for example, heat-dissipating silicon. The heat sink (not shown) is bonded to the upper surface of the LED support 31 so as to be in close contact with each other. The cables 11 a and 11 b are wired to the positioning portion 33 of the heat sink 30 along the groove 34 of the heat sink 30 as shown in FIG. 1A and FIG. The cables 11a and 11b may be routed by forming a hollow portion having an opening surface on the positioning portion 33 side inside the heat sink 30, and introducing the cables 11a and 11b into the hollow portion.

  Next, the cables 11a and 11b are respectively inserted into the narrow holes provided in the bottom surface of the opening of the flange 40, and the heat sink 30 is connected to the heat sink while applying tension so that there is no play of the cables 11a and 11b in the opening. It press-fits in the opening part of the flange 40 so that the positioning part 30 and the positioning member provided in the opening part of the flange may contact | abut. The outer diameter of the heat sink 30 is substantially the same as the outer diameter of the opening portion of the flange 40, and the heat sink 30 is press-fitted and fixed to the opening portion of the flange 40. In order to securely fix the heat sink 30 and the flange 40, they may be bonded to each other with a heat-resistant seal.

  Next, the lid portion 40c of the flange 40 is removed, and the terminals 40d and the cables 11a and 11b protruding into the hollow area in the flange 40 are soldered, and then the lid portion 40c is fitted again.

  Finally, the protective cap 20 is bonded to the outer peripheral surface of the LED support base 31 of the heat sink 30.

Next, a system when the LED unit 100 according to Embodiment 1 is mounted on a vehicle will be described.
FIG. 3 is a diagram schematically showing a system configuration when the LED unit 100 is mounted on a vehicle. In FIG. 3, reference numeral 301 denotes a power supply unit, which is a 12V battery used for ordinary automobiles. Reference numeral 302 denotes a switch for controlling the lighting of the LED unit 100, and a fog lamp lighting switch normally disposed near the driver's seat in the vehicle is used. Reference numeral 303 denotes a resistor. As described above, the LED unit 100 according to the first embodiment has a rated power of 5 W and a voltage to be used is 12 V. Therefore, a 20 W, 15 Ω cement resistor is used as the resistor 303.

  Reference numeral 304 denotes a connector on the vehicle body side that connects the power cable and the LED unit 100. Reference numeral 305 denotes a light housing of a fog lamp of the vehicle main body. The light housing 305 or the vehicle body around the light housing 305 is provided with a flange fixing member having a shape corresponding to the vehicle type and the specification of the lamp. An HB4 type flange is fixed to the light housing 305 in FIG. For this purpose, a groove is provided.

  When the LED unit 100 is mounted on the vehicle body, first, the heat sink 30 of the LED unit 100 is inserted into an opening provided in the light housing 305 and protrudes into the light housing 305. Next, the claw portion 40a provided on the flange 40 is slid into the light housing 305 or a guide groove provided on the vehicle body, and the LED unit 100 is fixed to the vehicle body.

  Next, the resistor 303 is interrupted on the positive power line of the power supply unit 301. At this time, the resistor 303 is disposed in the vicinity of the LED unit 100 in consideration of workability. Then, the vehicle-side connector 304 is fitted into the connector portion 4b of the flange 40. When the existing fog lamp switch is not used, the switch 302 is inserted on the positive power line of the power supply unit 301 and arranged near the driver's seat of the vehicle, like the resistor 303.

  According to the above system, it is possible to drive the LED unit 100 at 700 mA and 3 V using a 12 V battery used for ordinary automobiles, and the heat generated by the lighting of the LED 10 diffuses from the heat radiating part 32 of the heat sink 30. The LED unit 100 is efficiently cooled.

  As described above, according to the LED unit 100 according to the first embodiment, the heat sink 30 made of the aluminum member that has been subjected to grooving on the flange 40 having the opening and the claw portion 40a that is engaged with the vehicle body is provided. Since the high power type LED 10 is bonded to the upper part of the heat sink 30 by press-fitting and fixing, the light source unit having a high color temperature and high brightness and excellent heat dissipation is subjected to special processing on the vehicle body. This makes it possible to synchronize the light shade of the fog lamp with the headlight without reducing the amount of light, and to improve the fashionability when the fog lamp is lit.

  The LED unit 100 according to the first embodiment may be used for a vehicle daylight, a flashlight, and the like in addition to the fog lamp.

  The LED unit according to the present invention is useful in that the light color of the fog lamp and the white color of the HID headlight can be coordinated, and a next-generation light source bulb excellent in function can be provided. .

It is a right view of the LED unit by Embodiment 1 of this invention. It is a front view of the LED unit by Embodiment 1 of this invention. It is a rear view of the LED unit by Embodiment 1 of this invention. It is a top view of the LED unit by Embodiment 1 of this invention. It is a bottom view of the LED unit by Embodiment 1 of this invention. It is a right view of the heat sink by Embodiment 1 of this invention. It is a top view of the heat sink by Embodiment 1 of this invention. It is a front view of the heat sink by Embodiment 1 of this invention. It is a schematic diagram showing the system configuration | structure in case the LED unit by Embodiment 1 of this invention is mounted | worn with a vehicle.

Explanation of symbols

10 LED
11a, 11b Cable 20 Protective cap 30 Heat sink 31 LED support base 32 Heat radiation part 33 Positioning part 34 Groove part 40 Flange 40a Claw part 40b Connector part 40c Cover part 301 Power supply unit 302 Switch 303 Resistance 304 Vehicle side connector 305 Light housing

Claims (3)

  1. A light emitting diode having a heat dissipation member;
    A heat sink in which a plurality of grooves are cut on the side surface of the columnar metal member;
    A flange having at least an engaging portion for locking to the vehicle body,
    The heat sink is fixed to the flange such that when the flange is locked to the vehicle body, the upper surface of the heat sink projects into the light housing of the vehicle body,
    The light emitting diode is bonded to the upper surface of the heat sink so that the heat radiating member of the light emitting diode and the upper surface of the heat sink are in close contact with each other.
    A light emitting diode unit characterized by that.
  2. The light emitting diode unit according to claim 1,
    The flange has a bottomed opening having a circular cross section that opens toward the light housing when the flange is locked to the vehicle body.
    The heat sink is made of a solid aluminum columnar material having substantially the same diameter as the opening.
    A light emitting diode unit characterized by that.
  3. The light emitting diode unit according to claim 2,
    The heat sink is formed by cutting, on its side surface, twelve grooves facing the longitudinal direction of the heat sink with an equal width.
    A light emitting diode unit characterized by that.
JP2005254093A 2005-08-07 2005-08-07 Light emitting diode unit Pending JP2007048727A (en)

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JP2005254093A JP2007048727A (en) 2005-08-07 2005-08-07 Light emitting diode unit

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Application Number Priority Date Filing Date Title
JP2005254093A JP2007048727A (en) 2005-08-07 2005-08-07 Light emitting diode unit

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JP2007048727A true JP2007048727A (en) 2007-02-22

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009010081A (en) * 2007-06-27 2009-01-15 Mac Eight Co Ltd Socket for light emitting diode
JP2010176925A (en) * 2009-01-27 2010-08-12 Ichikoh Ind Ltd Vehicle lighting fixture
CN103162207A (en) * 2011-12-15 2013-06-19 欧司朗股份有限公司 Light-emitting diode (LED) unit installing module and manufacturing method thereof and LED lighting device and automobile headlamp
WO2014015484A1 (en) * 2012-07-25 2014-01-30 深圳市益科光电技术有限公司 Led automobile headlamp
JP2015022887A (en) * 2013-07-18 2015-02-02 株式会社Day in Day out Lighting bulb
JP2019029266A (en) * 2017-08-01 2019-02-21 株式会社日本コーティング Led headlight replacing waterproof cylindrical cover

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002334604A (en) * 2001-03-06 2002-11-22 Yoshimitsu Suda Bulb for headlight or the like
JP2004063084A (en) * 2002-07-24 2004-02-26 Stanley Electric Co Ltd Led light source for vehicular lighting fixture
WO2004034748A1 (en) * 2002-10-03 2004-04-22 Gelcore Llc Led-based modular lamp
JP2005513815A (en) * 2001-12-29 2005-05-12 杭州富陽新穎電子有限公司 Light-emitting diodes and light-emitting diode lamp

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002334604A (en) * 2001-03-06 2002-11-22 Yoshimitsu Suda Bulb for headlight or the like
JP2005513815A (en) * 2001-12-29 2005-05-12 杭州富陽新穎電子有限公司 Light-emitting diodes and light-emitting diode lamp
JP2004063084A (en) * 2002-07-24 2004-02-26 Stanley Electric Co Ltd Led light source for vehicular lighting fixture
WO2004034748A1 (en) * 2002-10-03 2004-04-22 Gelcore Llc Led-based modular lamp
JP2006502551A (en) * 2002-10-03 2006-01-19 ゲルコアー リミテッド ライアビリティ カンパニー LED-based modular lamp

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009010081A (en) * 2007-06-27 2009-01-15 Mac Eight Co Ltd Socket for light emitting diode
JP2010176925A (en) * 2009-01-27 2010-08-12 Ichikoh Ind Ltd Vehicle lighting fixture
CN103162207A (en) * 2011-12-15 2013-06-19 欧司朗股份有限公司 Light-emitting diode (LED) unit installing module and manufacturing method thereof and LED lighting device and automobile headlamp
WO2014015484A1 (en) * 2012-07-25 2014-01-30 深圳市益科光电技术有限公司 Led automobile headlamp
JP2015526854A (en) * 2012-07-25 2015-09-10 シェンツェン イーク エレクトロオプティカル テクノロジー カンパニー リミテッド LED headlamps for automobiles
US9476564B2 (en) 2012-07-25 2016-10-25 Shenzhen Yike Electrooptical Technology Co., Ltd. LED automobile headlamp
JP2015022887A (en) * 2013-07-18 2015-02-02 株式会社Day in Day out Lighting bulb
JP2019029266A (en) * 2017-08-01 2019-02-21 株式会社日本コーティング Led headlight replacing waterproof cylindrical cover

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