JP2005125993A - Led lamp for bicycle - Google Patents

Led lamp for bicycle Download PDF

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Publication number
JP2005125993A
JP2005125993A JP2003365883A JP2003365883A JP2005125993A JP 2005125993 A JP2005125993 A JP 2005125993A JP 2003365883 A JP2003365883 A JP 2003365883A JP 2003365883 A JP2003365883 A JP 2003365883A JP 2005125993 A JP2005125993 A JP 2005125993A
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lamp
led
bicycle
bracket
led light
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JP4235906B2 (en
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Kazumitsu Futami
和光 二見
Tsutomu Sekimoto
力 関本
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Morita Miyata Corp
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Miyata Industry Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
    • B62J6/02—Headlights
    • B62J6/028—Headlights specially adapted for rider-propelled cycles with or without additional source of power
    • B62J6/029—Headlights specially adapted for rider-propelled cycles with or without additional source of power characterised by the structure, e.g. casings

Abstract

<P>PROBLEM TO BE SOLVED: To sufficiently exhibit function inherent to an LED light emission element by efficiently releasing the generation of heat of a high output LED lamp. <P>SOLUTION: The LED lamp for the bicycle comprises a lamp case building-in the LED light emission element as a light source and its light emission control circuit; and a lamp bracket for supporting the lamp case to a bicycle frame. The LED light emission element is directly carried on a tip end of the lamp bracket. Therefore, cooling effect of the LED lamp is large and design property of the lamp case itself is not restricted. Parts such as the bracket for mounting the LED light emission element and a heat release fin are not required, the number of parts is reduced and reduction of cost can be realized. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、自転車のヘッドランプ又はテールランプ、あるいはサイドランプとして用いられるＬＥＤランプ、特に高出力ＬＥＤランプの構造に関し、発光素子から出る熱をランプケース外に効率よく放熱させることにより、発熱に伴うＬＥＤ発光素子の発光輝度および耐久性低下を防止することを目的とする。   The present invention relates to a structure of an LED lamp used as a head lamp or tail lamp of a bicycle, or a side lamp, in particular, a high-power LED lamp, and an LED accompanying heat generation by efficiently dissipating heat emitted from a light-emitting element to the outside of the lamp case. The object is to prevent a decrease in light emission luminance and durability of the light emitting element.

自転車用のランプは、これまでフィラメント電球を光源としたもの（例えば特開２００２−１３３９１２）が多用されてきたが、最近ではＬＥＤ半導体発光ダイオード（例えば特開２００１−２９４１８５）の使用が試みられるようになった。 しかし光源としてフィラメント電球を用いる場合にはフィラメントからの発熱が電球内部のガスを活性化させると共に輝度を増加させるという良好な作用を伴うところから格別問題視されることはなかった。   Bicycle lamps using filament light bulbs as a light source (for example, Japanese Patent Application Laid-Open No. 2002-133912) have been widely used, but recently, LED semiconductor light-emitting diodes (for example, Japanese Patent Application Laid-Open No. 2001-294185) have been tried. Became. However, when a filament light bulb is used as the light source, there has been no particular problem because the heat generated from the filament activates the gas inside the light bulb and increases the brightness.

しかしながら、ＬＥＤランプ、とりわけて１ワット以上の高出力ＬＥＤランプの場合においては、通電発光する際に素子から極端には１００℃を超える高温発熱を伴うことがあり、その結果輝度が５０％以下に低下し、また寿命についてもおよそ１０００分の１以下にまで低下することが実験結果から明らかとなっており、熱に弱い半導体のＬＥＤランプにおける発光輝度の低下、および短寿命化を招く。   However, in the case of LED lamps, especially high-power LED lamps of 1 watt or more, high-temperature heat generation exceeding 100 ° C. may occur from the element when energized and emitted, resulting in a luminance of 50% or less. It is clear from the experimental results that the lifetime is reduced to about 1/1000 or less, resulting in a decrease in light emission luminance and a shortened lifetime in a heat-sensitive semiconductor LED lamp.

またそればかりでなく、高熱によりＬＥＤランプ周辺のＡＢＳ樹脂類をはじめとした部品類を変形させやすいところから、特にランプケースや反射鏡、レンズ等の樹脂関係部品について耐熱性の樹脂を用い、あるいは耐熱アルミ蒸着を施したものを使用する必要があるために著しくコスト高となるのを免れない。   Not only that, but because it is easy to deform parts such as ABS resin around the LED lamp due to high heat, use heat-resistant resin especially for resin-related parts such as lamp cases, reflectors, and lenses, or Since it is necessary to use heat-resistant aluminum vapor-deposited, it is inevitable that the cost will be significantly increased.

そのために、ランプケース内においてＬＥＤ発光素子の裏側にアルミ製の放熱フィンを取り付けて半導体ＬＥＤ発光素子の発熱を抑制することも考えられているが、密閉されたランプケース内での放熱にとどまるため放熱量が少なく、またランプケース自体の容積を大型化するにも限界があるために、ケース内での雰囲気温度が上昇してしまい、冷却効率を上昇させることは困難である。   For this reason, it is also considered that an aluminum radiating fin is attached to the back side of the LED light emitting element in the lamp case to suppress heat generation of the semiconductor LED light emitting element. Since the amount of heat radiation is small and there is a limit to increasing the volume of the lamp case itself, the ambient temperature in the case increases and it is difficult to increase the cooling efficiency.

また、この場合小型の放熱フィンではフィンそのものも温度が８０℃〜９０°程度に上昇してしまうところからあまり効果が期待できないため、必然的にフィンを大型化することになるが、その結果デザインの自由度が著しく損なわれ易い。
特開２００２−１３３９１２ 特開２００１−２９４１８５ In this case, a small heat radiating fin cannot be expected to be very effective because the temperature of the fin itself rises to about 80 ° C to 90 ° C. The degree of freedom is easily impaired.
JP 2002-133912 A JP 2001-294185 A

本発明は、上記した従来技術における課題を解決し、ＬＥＤ発光素子の温度を常時５０℃以下に維持し、ＬＥＤ発光素子が本来的に有する性能を十分に発揮でき、また場合によっては定格以上の性能を発揮させることを目的とする。   The present invention solves the above-described problems in the prior art, maintains the temperature of the LED light-emitting element at 50 ° C. or lower at all times, can fully exhibit the performance inherent in the LED light-emitting element, and in some cases exceeds the rating The purpose is to demonstrate performance.

すなわち本発明は、請求項１の発明は、光源としてＬＥＤ発光素子およびその発光制御回路を内臓したランプケースと、該ランプケースを自転車フレームに支承させるランプブラケットとからなり、ＬＥＤ発光素子は、ランプブラケットの先端部に直接担持させてなることを特徴とした自転車用ＬＥＤランプに関する。   That is, the present invention comprises a lamp case incorporating an LED light emitting element and its light emission control circuit as a light source, and a lamp bracket for supporting the lamp case on a bicycle frame. The present invention relates to a bicycle LED lamp characterized in that it is directly supported on the tip of a bracket.

また請求項２の発明は、ランプブラケットの先端部が、ランプケース内に入り込んでＬＥＤ発光素子を直接担持するものであるところの請求項１に記載の自転車用ＬＥＤランプに関する。 さらに請求項３の発明は、ランプブラケットが金属製である請求項１又は請求項２に記載の自転車用ＬＥＤランプに関する。   The invention according to claim 2 relates to the bicycle LED lamp according to claim 1, wherein the tip end portion of the lamp bracket enters the lamp case and directly supports the LED light emitting element. Further, the invention of claim 3 relates to the bicycle LED lamp according to claim 1 or claim 2, wherein the lamp bracket is made of metal.

さらに請求項４の発明は、ＬＥＤ発光素子が１Ｗ以上の高出力ＬＥＤである請求項１又は請求項２に記載の自転車用ＬＥＤランプに関する。 さらに請求項５の発明は、ＬＥＤランプがヘッドランプ又はテールランプ、あるいはサイドランプの何れかであるところの請求項１又は請求項２に記載の自転車用ＬＥＤランプに関する。   The invention according to claim 4 relates to the bicycle LED lamp according to claim 1 or 2, wherein the LED light emitting element is a high-power LED of 1 W or more. Further, the invention of claim 5 relates to the bicycle LED lamp according to claim 1 or 2, wherein the LED lamp is either a head lamp, a tail lamp, or a side lamp.

さらに請求項６の発明は、ランプブラケットが、ＬＥＤ発光素子を直接担持する先端部に至るまで継目なしの一体物であるところの請求項１又は請求項２に記載の自転車用ＬＥＤランプに関する。   Furthermore, the invention of claim 6 relates to the bicycle LED lamp according to claim 1 or claim 2, wherein the lamp bracket is a one-piece integrated body up to the tip portion directly supporting the LED light emitting element.

本発明によれば、ランプケース内のＬＥＤランプが発熱すると、これを担持しているランプブラケットの先端からランプケース外の、フロントフォーク等の自転車フレームに熱伝導されるほか、走行に伴ってランプケース外に露出するランプブラケットが空冷され、ランプケースの内容積が小さくても効果的に放熱される結果、ＬＥＤランプの冷却効果が大きく、またランプケース自体のデザイン性を制限することがない。   According to the present invention, when the LED lamp in the lamp case generates heat, heat is conducted from the front end of the lamp bracket carrying the lamp to a bicycle frame such as a front fork outside the lamp case, and the lamp is accompanied with traveling. The lamp bracket exposed outside the case is air-cooled, and heat is effectively dissipated even if the inner volume of the lamp case is small. As a result, the cooling effect of the LED lamp is great, and the design of the lamp case itself is not limited.

また、ＬＥＤ発光素子をランプブラケットの先端に直接に取り付けるために、在来品のようにＬＥＤ発光素子を取り付けるためのブラケットや放熱フィン等の部品が不要となり、部品点数が減少してコストの低減をはかることができる。 さらに冷却効果が大きいために、ＬＥＤランプを、その電気的定格を越えたレベルでの輝度での点灯使用も可能となる。   In addition, since the LED light emitting element is directly attached to the tip of the lamp bracket, there is no need for parts such as brackets and heat radiating fins for attaching the LED light emitting element like conventional products, reducing the number of parts and reducing the cost. Can be measured. Further, since the cooling effect is great, the LED lamp can be used for lighting at a luminance exceeding the electrical rating.

以下において本発明の具体的な内容を図１〜２の実施例をもとに説明すると、１はランプケース、９は該ランプケース１を自転車フレームに取り付けて支承させるためのランプブラケットを示す。 さらにランプケース１は、内部に開口面に向けた反射鏡２、ランプ制御回路基板４を備えるとともに、反射鏡２を有する開口面を覆うべくレンズ３が嵌め込まれて内部を密封状態に構成している。 なお図において５はハブダイナモ（図示省略）その他の電源（例えばブロックダイナモや一次電池又は二次電池など）に接続するためのリード線をあらわしている。   The specific contents of the present invention will be described below with reference to the embodiment shown in FIGS. 1 and 2. Reference numeral 1 denotes a lamp case, and 9 denotes a lamp bracket for attaching the lamp case 1 to a bicycle frame for support. Further, the lamp case 1 includes a reflecting mirror 2 and a lamp control circuit board 4 facing the opening surface inside, and a lens 3 is fitted to cover the opening surface having the reflecting mirror 2 so that the inside is sealed. Yes. In the figure, reference numeral 5 denotes a lead wire for connection to a hub dynamo (not shown) or other power source (for example, a block dynamo, a primary battery or a secondary battery).

さらにランプブラケット９は、基部９ａと、ランプケース保持部９ｂと、該ランプケース保持部９ｂの前端を上方に直角に折り曲げるとともに、ランプケース１内に入り込ませた先端部９ｃとからなり、材質としては熱伝導性を確保する必要から通常は普通鋼やステンレス材、アルミ材などの金属製のものであって、基部９ａからＬＥＤ発光素子を直接担持する先端部９ｃに至るまで継目なしの一体物の使用が好ましい。   Further, the lamp bracket 9 includes a base portion 9a, a lamp case holding portion 9b, a front end portion of the lamp case holding portion 9b that is bent upward at a right angle, and a front end portion 9c that is inserted into the lamp case 1 as a material. Is usually made of metal such as ordinary steel, stainless steel, aluminum material, etc. because of the need to ensure thermal conductivity, and is a seamless unit from the base portion 9a to the tip portion 9c that directly supports the LED light emitting element. Is preferred.

しかし、ランプブラケット９として複数の部材を溶接やビス止め等により一体的に結合させたものであっても、全体としてある程度の強度があり、しかも熱伝導が可能なものであれば、このほかの材料であってもよい。   However, even if the lamp bracket 9 is formed by integrally joining a plurality of members by welding, screwing, or the like, as long as it has some strength as a whole and can conduct heat, other lamp brackets 9 may be used. It may be a material.

またランプブラケット９の形状や構造についても、上記した条件を満たすものであれば格別形状や加工方法、あるいは表面処理その他について問われない。 なおこの場合におけるランプブラケット９を構成する材料の寸法については、材質如何によっても多少異なるものの、ある程度の強度と熱伝導が得られるものであればよく、具体例を挙げれば、概ね板厚：０．８〜３．５ｍｍ、板幅：５．０ｍｍ以上であって、断面積が４．０ｍｍ２以上であれば好ましい。 Further, the shape and structure of the lamp bracket 9 may be any special shape, processing method, surface treatment, or the like as long as the above conditions are satisfied. In this case, the dimensions of the material constituting the lamp bracket 9 are slightly different depending on the material, but may be any material that can obtain a certain degree of strength and heat conduction. 0.8 to 3.5 mm, plate width: 5.0 mm or more, and a cross-sectional area of 4.0 mm 2 or more is preferable.

さらにランプブラケット９の先端部９ｃには電気的絶縁材７およびアルミ基板８を介してＬＥＤ発光素子６が直接に担持される。 なおこの場合に使用されるＬＥＤ発光素子６は、自転車の夜間走行における安全性を十分に確保するために高い輝度による発光を可能とする目的で、少なくとも１Ｗ（ワット）以上の高出力ＬＥＤが用いられるが、この他にも汎用のＬＥＤ発光素子に対しても有効である。   Further, the LED light emitting element 6 is directly supported on the tip end portion 9 c of the lamp bracket 9 via the electrical insulating material 7 and the aluminum substrate 8. The LED light-emitting element 6 used in this case is a high-power LED of at least 1 W (watts) or more for the purpose of enabling light emission with high luminance in order to sufficiently ensure safety during bicycle night driving. However, it is also effective for general-purpose LED light emitting elements.

さらにランプブラケット９のランプケース保持部９ｂにはランプケース１がネジ１０により固定一体化されており、また基部９ａは自転車フレーム１１におけるフロントフォーク１２の取り付けステー１３に、ネジ１４により締め付け固定されている。   Further, the lamp case 1 is fixedly integrated with the lamp case holding portion 9b of the lamp bracket 9 by screws 10, and the base portion 9a is fastened and fixed to the mounting stay 13 of the front fork 12 in the bicycle frame 11 by screws 14. Yes.

なお、上記の実施例においては本発明の適用例としてヘッドランプについて説明したが、このほかにもテールランプ、あるいはサイドランプその他のランプについても適用が可能である。 この場合にはランプブラケットによりフロントフォーク取り付けに限らず、ハンドルやカゴ、あるいはフレーム等、自転車を構成する金属部分に対して取り付けられる。   In the above embodiment, the headlamp has been described as an application example of the present invention. However, the present invention can also be applied to a tail lamp, a side lamp, and other lamps. In this case, the lamp bracket is used not only for front fork attachment but also for metal parts constituting the bicycle, such as a handle, a basket, or a frame.

上記の構成において、本発明のＬＥＤランプをヘッドランプとして備えた自転車を走行させた場合、図２に実線矢印であらわしたようにＬＥＤ発光素子６の発熱がランプブラケットの先端部９ｃからランプケース保持部９ｂおよび基部９ａ、ならびに取り付けステー１３を介してフロントフォーク１２へと伝導されて放熱されるばかりでなく、さらに走行風（鎖線矢印）がランプケース（図示省略）から外部に露出しているランプブラケット９の基部９ａやランプケース保持部９ｂに接して空冷するために十分な放熱効果が得られる。   In the above configuration, when a bicycle equipped with the LED lamp of the present invention as a headlamp is run, the heat generated by the LED light-emitting element 6 is retained from the tip end portion 9c of the lamp bracket as shown by the solid line arrow in FIG. A lamp in which not only is heat transmitted to the front fork 12 via the portion 9b and the base portion 9a, and the mounting stay 13, but heat is also emitted from the lamp case (not shown) to the outside. A sufficient heat radiation effect is obtained because the bracket 9 is in air contact with the base portion 9a and the lamp case holding portion 9b for air cooling.

本発明者らが実験した結果によれば、本発明に係るＬＥＤランプをヘッドランプとして備えた自転車を、夜間に通常一般的な走行モードによりランプを点灯させながら走行・停止を繰り返しつつＬＥＤランプの温度上昇を測定したところ、走行時においてはランプケース外に露出したランプブラケットが走行風により強制冷却されて十分に放熱されるばかりでなく、自転車の停止時においてもせいぜい４１℃までにしか上昇しなかった。   According to the results of experiments conducted by the present inventors, a bicycle equipped with the LED lamp according to the present invention as a headlamp is repeatedly operated and stopped at night while the lamp is turned on in a general driving mode. When the temperature rise was measured, the lamp bracket exposed outside the lamp case was not only forcibly cooled by the driving wind and sufficiently dissipated heat during driving, but also increased to 41 ° C at best even when the bicycle was stopped. There wasn't.

本発明に係る自転車用ＬＥＤランプの要部を断面であらわした概略側面図。The schematic side view showing the principal part of the LED lamp for bicycles concerning the present invention in the section. 図１の自転車用ＬＥＤランプを装着した自転車の、走行時における放熱の状態をあらわした側面図。The side view showing the state of the heat dissipation at the time of driving | running | working of the bicycle which mounted | wore with the LED lamp for bicycles of FIG.

符号の説明Explanation of symbols

１ ランプケース
２ 反射鏡
３ レンズ
４ ランプ制御回路基板
５ リード線
６ ＬＥＤ発光素子
７ 電気的絶縁材
８ アルミ基板
９ ランプブラケット
９ａ 基部
９ｂ ランプケース保持部
９ｃ 先端部
１０ ネジ
１１ 自転車フレーム
１２ フロントフォーク
１３ 取り付けステー DESCRIPTION OF SYMBOLS 1 Lamp case 2 Reflector 3 Lens 4 Lamp control circuit board 5 Lead wire 6 LED light emitting element 7 Electrical insulating material 8 Aluminum substrate 9 Lamp bracket 9a Base part 9b Lamp case holding part 9c Tip part 10 Screw 11 Bicycle frame 12 Front fork 13 Mounting stay

Claims (6)

光源としてＬＥＤ発光素子およびその発光制御回路を内臓したランプケースと、該ランプケースを自転車フレームに支承させるランプブラケットとからなり、ＬＥＤ発光素子は、ランプブラケットの先端部に直接担持させてなることを特徴とした自転車用ＬＥＤランプ。   It comprises a lamp case incorporating an LED light emitting element and its light emission control circuit as a light source, and a lamp bracket for supporting the lamp case on a bicycle frame, and the LED light emitting element is directly supported on the tip of the lamp bracket. Characteristic LED lamp for bicycles. ランプブラケットの先端部が、ランプケース内に入り込んでＬＥＤ発光素子を直接担持するものであるところの請求項１に記載の自転車用ＬＥＤランプ。   The bicycle LED lamp according to claim 1, wherein the tip of the lamp bracket enters the lamp case and directly supports the LED light emitting element. ランプブラケットが金属製である請求項１又は請求項２に記載の自転車用ＬＥＤランプ。   The bicycle LED lamp according to claim 1 or 2, wherein the lamp bracket is made of metal. ＬＥＤ発光素子が１Ｗ以上の高出力ＬＥＤである請求項１又は請求項２に記載の自転車用ＬＥＤランプ。   The bicycle LED lamp according to claim 1 or 2, wherein the LED light emitting element is a high power LED of 1 W or more. ＬＥＤランプがヘッドランプ又はテールランプ、あるいはサイドランプの何れかであるところの請求項１又は請求項２に記載の自転車用ＬＥＤランプ。   The bicycle LED lamp according to claim 1 or 2, wherein the LED lamp is a head lamp, a tail lamp, or a side lamp. ランプブラケットが、ＬＥＤ発光素子を直接担持する先端部に至るまで継目なしの一体物であるところの請求項１又は請求項２に記載の自転車用ＬＥＤランプ。   The bicycle LED lamp according to claim 1 or 2, wherein the lamp bracket is a seamless integral part extending to a tip portion directly supporting the LED light emitting element.
JP2003365883A 2003-10-27 2003-10-27 LED lamp for bicycle Expired - Fee Related JP4235906B2 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100914833B1 (en) * 2009-04-16 2009-09-02 방원식 Light for bicycle
JP2010006150A (en) * 2008-06-25 2010-01-14 Panasonic Corp Lamp for bicycle
JP2010125897A (en) * 2008-11-25 2010-06-10 Yamaha Motor Co Ltd Motorcycle
JP2010146817A (en) * 2008-12-17 2010-07-01 Koito Mfg Co Ltd Vehicle lamp
JP2013067339A (en) * 2011-09-26 2013-04-18 Honda Motor Co Ltd Vehicular cooling structure mounting led light
WO2020122295A1 (en) * 2018-12-14 2020-06-18 이재용 Structure and method for downsizing light and bicycle light to which same is applied

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010006150A (en) * 2008-06-25 2010-01-14 Panasonic Corp Lamp for bicycle
JP2010125897A (en) * 2008-11-25 2010-06-10 Yamaha Motor Co Ltd Motorcycle
JP2010146817A (en) * 2008-12-17 2010-07-01 Koito Mfg Co Ltd Vehicle lamp
KR100914833B1 (en) * 2009-04-16 2009-09-02 방원식 Light for bicycle
JP2013067339A (en) * 2011-09-26 2013-04-18 Honda Motor Co Ltd Vehicular cooling structure mounting led light
WO2020122295A1 (en) * 2018-12-14 2020-06-18 이재용 Structure and method for downsizing light and bicycle light to which same is applied

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