201221389 六、發明說明： C 明戶斤屬特，興】 發明領域 本發明係有關於一種車輛用前照燈。 本案係依據於2010年9月17日，於日本提申之日本專剎 申請案2〇10-209502號，主張優先權，於此沿用其内容。 L· ΖΙ 發明背景 車輛用前照燈從行走安全上之觀點而言，係將光投射 於車輛前方之預定照明區域之結構。此照明區威根據車辆 之規格或預定法規訂定，車輛用前照燈之照明光學系統& 計光學為可將光投射於此訂定之照明區域。於Τ述專利& 獻揭示包含有光源、透鏡、反射器等作為照明光學系統之· 車輛用前照燈。 先行技術文獻 專利文獻 專利文獻1日本專利公開公報2007-207528號 專利文獻2日本專利公開公報2010-108637號 t發明内容3 發明概要 發明欲解決之課題 而在習知技術之光學設計中’有耗費許多時間及費用 之問題。具體言之，需進行光源、透鏡、反射器之焦點位 置之對準、及透鏡之聚光、擴散等光學設計。然後’由於 3 201221389 在開發製品前，反覆進行上述光學設計數次至十數次，試 作、實驗也進行如此多次，故有在開發完畢前，耗費許多 時間及費用之問題。 本發明即係鑑於上述問題點而進行。本發明之目的係 提供光學設計容易，而可達成預定之性能，試作、實驗也 可為短期間，且也減少費用負擔之車輛用前照燈。 用以欲解決課題之手段 為解決上述課題，採用以下之結構。本發明一態樣之 車輛用前照燈包含有透明蓋、燈體及照明光學系統，該照 明光學系統係收容於前述燈體内，透過前述透明蓋，將光 投射於車輛前方之預定照明區域者。前述照明光學系統具 有半導體發光元件及光束引導筒，該半導體發光元件係設 定成光軸朝向前述透明蓋者；該光束引導筒係設於前述半 導體發光元件與前述透明蓋間，並且，包圍前述光軸之周 圍而規定前述照明區域者。 藉採用此種結構，從半導體發光元件發出之指向性高 之光以配置於其光軸周圍之光束引導筒引導，透過透明 蓋，投射於車輛前方之預定照明區域。照明區域以光束引 導筒規定。由於此光束引導筒形狀簡單，不需如習知般進 行對焦，故配置之自由度高，設計變更容易。此外，由於 藉將光束引導筒之開口形狀變更設計，可調整照射方向、 照射範圍、光量，故可易達成預定之要求性能。 又，前述車輛用前照燈亦可如以下構成：前述光束引 導筒更具有設於配置前述半導體發光元件之側之光導入 201221389 口、及設於配置前述透明蓋之側之光導出口。又，前述半 導入口之至少一部份及前述光導出口之至少一部份在前述 光軸延伸之方向重疊配置。 藉採用此種結構，由於在光軸延伸之方向，光導入口 之至少一部份與光導出口之至少一部份重疊配置，故從半 導體發光元件發出之光量多之直射光被導引至透明蓋，而 投射於照明區域。 又，前述車輛用前照燈亦可如以下構成：前述光束引 導筒具有開口面積隨著從前述光導入口往前述光導出口， 在上方以外之方向逐漸增大之形狀。 藉採用此種結構，由於從半導體發光元件發出之光雖 然放射、擴散，但光束引導筒之開口面積則隨著從光導入 口往光導出口逐漸增大，故可減低因此放射、擴散，光撞 擊光束引導筒之内面，而可減低因該撞擊引起之光損失。 又，藉使光束引導筒在上方以外之方向逐漸增大，可減少 上方之光量，而對對向車消除刺眼。 又，前述車輛用前照燈亦可如以下構成：前述車輛用 前照燈更包含有調整前述光導出口之位置之位置調整機構。 藉採用此種結構，即使組裝光束引導筒後，藉調整光 導出口之位置，仍可進行照射方向之調整。 又，前述車輛用前照燈亦可如以下構成：於前述光束 引導筒之内面側設光反射面。 藉採用此種結構，由於因放散、擴散撞擊光束引導筒 之内面之光以光反射面反射，最後從光導出口導出，故可 201221389 將發光之光不浪費地投射於照射區域。 又’前述車輛用前照燈亦可如以下構成：前述光反射 面具有曲率。 藉採用此種結構，使光反射面具有曲率，可控制反射 光之擴散範圍。 又’前述車輛用前照燈亦可如以下構成：在前述光束 引導筒之内面側，設於上方之前述光反射面及設於下方之 前述光反射面具相互不同之光反射率。 藉採用此種結構，可避免在上方之光反射面反射之反 射光與在下方之光反射面反射之反射光偏光而互相干擾’ 而可一樣地照明於照明區域。 又，前述車輛用前照燈亦可如以下構成：前述半導體 發光元件之光軸朝向比沿著水平面之方向下方設定。 藉採用此種結構，由於藉將半導體發光元件之光軸朝 比沿著水平面之方向下方設定，可對路面上之照明區域投 射直射光’故可有效利用光量。 又，前述車輛用前照燈亦可如以下構成：前述光束引 導筒之配置前述透明蓋之側之一端部的下部具有朝向配置 前述半導體發光元件之側之另一端部在預定距離缺口之形狀。 藉採用此種結構，由於對光束引導筒之上側，下側相 對較短’故可一面限制朝向上側之光，一面使朝向下側之 光之光量增加。 又’前述車輛用前照燈亦可如以下構成：前述缺口之 形狀係設置成在包夾著前述光軸之左右方向隔著間隔而成 201221389 對。 藉採用此種結構，可一面抑制車輛前方正下方之照明 區域之光量，一面使其左右方向之照明區域之光量增加。 又，前述車輛用前照燈亦可如以下構成：前述光束引 導筒具有設於配置前述半導體發光元件之側之光導入口及 設於配置前述透明蓋之側之光導出口，前述光導入口與前 述半導體發光元件留出間隙而配置。 藉採用此種結構，光從光導入口與半導體發光元件之 間隙漏出，不僅可照射光束引導筒之内部，還可照射外部， 而可使外觀美感提高。 又，前述車輛用前照燈亦可以下構成：前述光束引導 筒具有設於配置前述半導體發光元件之側之光導入口及設 於配置前述透明蓋之側之光導出口，於前述光束引導筒之 本體部形成有將透過前述光導入口導入至内部之光之一部 份導出至外部的第2光導出口。 藉採用此種結構，光積極地從形成於光束引導筒之本 體部之第2光導出口漏出至外部，而可使外觀美感提高。 發明效果 根據本發明，可獲得光學設計容易，而可達成預定之 性能，試作、實驗也可為短期間，且也減少費用負擔之車 輛用前照燈。 圖式簡單說明 第1圖係顯示設有本發明一實施形態之霧燈之轎車的 立體圖。 7 201221389 第2圖係顯示同實施形態之霧燈之安裝構造的截面圖。 第3圖係顯示同實施形態之霧燈之立體圖。 第4圖係顯示同實施形態之霧燈之分解立體圖。 第5圖係顯示同實施形態之霧燈之截面圖。 第6圖係顯示同實施形態之霧燈之分解截面圖。 第7圖係顯示LED之指向特性之圖。 第8A圖係第6圖之A-A截面圖。 第8B圖係第6圖之B-B截面圖。 第9A圖係顯示本發明另一實施形態之光導出口之開口 形狀的圖。 第9B圖係顯示本發明另一實施形態之光導出口之開口 形狀的圖。 第9C圖係顯示本發明另一實施形態之光導出口之開口 形狀的圖。 第9D圖係顯示本發明另一實施形態之光導出口之開口 形狀的圖。 第9E圖係顯示本發明另一實施形態之光導出口之開口 形狀的圖。 第10A圖係顯示本發明另一實施形態之霧燈之截面圖。 第10 B圖係顯示本發明另一實施形態之霧燈之截面圖。 第11圖係顯示本發明另一實施形態之霧燈之截面圖。 第12圖係顯示本發明另一實施形態之透明蓋之正面圖。 第13圖係顯示本發明另一實施形態之透明蓋之截面圖。 第14圖係顯示本發明另一實施形態之透明蓋之截面圖。 201221389 第15A圖係顯示本發明另一實施形態之霧燈之正面圖。 第15 B圖係顯示本發明另一實施形態之霧燈之截面圖。 第16A圖係顯示本發明另一實施形態之霧燈之正面圖。 第16B圖係顯示本發明另一實施形態之霧燈之截面圖。 第17圖係顯示本發明另一實施形態之霧燈之截面圖。 第18圖係顯示本發明另一實施形態之霧燈之截面圖。 第19圖係顯示本發明另一實施形態之光束引導筒之底 面圖。 I：實施方式3 用以實施發明之形態 接著，就本發明實施形態之一態樣，依據圖式作說明。 此外，在以下之說明中，例示將本發明應用於霧燈之情形。 第1圖係顯示設有本發明實施形態之霧燈1之驕車10 0 的立體圖。第2圖係顯示同實施形態之霧燈1之安裝構造的 截面圖。 如第1圖所示，於同實施形態之驕車100設有頭燈(行走 用前照燈、錯車用前照燈）1〇1、霧燈（前方霧燈）1作為車輛 用前照燈。此外，霧燈1亦稱為輔助前照燈。 如第2圖所示，霧燈1插入至設在前保險槓102之凹部 103，凹部103之底部與霧燈1之後部以螺絲構件2鎖固連結 而安裝。此外，霧燈1之組裝構造不限於此構造，可根據車 輛之規格等，適宜變更。 第3圖係顯示同實施形態之霧燈1之立體圖。第4圖係顯 示同實施形態之霧燈1之分解立體圖。第5圖係顯示同實施 ^1221389 形態之霧燈丨之截面圖。 分解截面圖。 圖係顯示同實施形態之霧燈1之 形成霧燈1為於叫_、透明蓋滅後部㈣ 容照明光學系，結構。 自#㈣ 方向態之燈 賵川由擠壓成形材形成。 管材以預定長度切斷，°言之，藉將經擠歷成形之 之燈體體1G。此外，同實施形態 等，按車輛之規格，適„更1㈣㈣狀或四角形管狀 為將從照明光學系統鄉出^計。此燈體10亦可具有作 功能。同眘尬〈熱排放至燈室外之散熱器的 色_極氡化處使散熱性能提高’由業經黑 亦可為進行黑色塗為使散熱性能提高， ^明錢以覆蓋燈體1G之—端部側開口 η之狀態安 、·明錢具有沿著—端部側開口11之内《合之嵌合 °R1。透明蓋20係接著於燈體10，以阻止異物(水、塵埃、 泥等)往燈f内侵人之結構。此透明㈣由玻璃材或樹脂材 等形成’係可使光往車輛前方投射之結構。 後部蓋30以覆蓋燈體10之另一端部側開口 12之狀態安 裝。後部蓋20具有沿著另一端部側開口 12之内面之嵌合部 31。.後盖3 0以接著、填隙或圖中未示之螺絲構件固著於 燈體10。後部蓋3〇係支撐照明光學系統40之結構。又，後 部蓋3 0具有作為將從照明光學系統4 〇發出之熱排放至燈室 外之散熱器的功能。 201221389 後部蓋30由將從照明光學系統40發出之熱之至少-部 份傳導紐體U)之熱傳導構件形成。同實施形態之後部蓋 30由經黑色_極氧化處理，以使散熱特性提高之銘材構 成。於後《30形減用以使燈㈣完全韻之透氣孔 32(參照第4圖）。根據上述結構，LED模組43之熱傳導至後 部蓋30,而散熱至外部。又’後部蓋3()之熱傳導至表面積(散 熱面積）更大之燈體10’再散熱至外部。因此，可防止^^口“ 之發光效率因溫度上升而降低。 此外，於燈體10及後部蓋30之任一者形成有圖中未示 之貫穿孔，以將包含有電性連接於照明光學系統4〇之電源 纜線等之圖中未示之線組導入至燈室内。 照明光學系統40由具有LED(半導體發光元件）41及基 板42之LED模組43、光束引導筒44構成。圖中未示之線組 係藉由基板42與LED41電性連接之結構。LED模組43隔著 散熱滑脂(在同實施形態中為矽樹脂滑脂），對後部蓋3 0以螺 絲構件33固定。又，如第5圖所示，LED41之光軸Αχ朝向透 明蓋20設定。此外，如第4圖所示，同實施形態之LED41具 有4個於左右方向（水平方向、車輛寬度方向）配置成直列之 面發光之矩形發光區域的發光部41 a，在此所指之光軸Αχ 係指將發光部41a視為1個光源時之中心之光軸。 第7圖係顯示LED之指向特性的圖。此外，同圖所示之 LED之指向特性詳細地揭示於非專利文獻（出處：山崎浩 著，省能源LED/EL照明設計入門、日刊工業報社、2010)。 如第7圖所示，LED41相較於習知之燈泡（電燈泡），射 201221389 出光之指向性高，擴散性低。具體言之，當令光軸Αχ(放射 角度0度）之相對照度為1時，至放射角度30度左右為止，可 維持相對照度0.8。又，當超過放射角度30度時，相對照對 急遽地降低。 光束引導筒44係設於LED41與透明蓋20間，並且，包 圍光軸Αχ之周圍而規定霧燈1之照明區域之結構。具體言 之’光束引導筒44係規定霧燈1之照明區域，以滿足預定法 規(保安基準、ECE規則等）之結構。 光束引導筒44具有設於配置LED41之側之光導入口 45、設於配置透明蓋2〇之側之光導出口 46。光導入口 45之 至少一部份與光導出口 46之至少一部份在光軸Αχ延伸之方 向重疊配置。根據此結構，從LED41發出之光由於具有上 述指向特性，故光量多之直射光被導引至透明蓋20，投射 於預定區域。 又’光束引導筒44具有依據LED41之上述指向特性’ 開口面積隨著從光導入口 45往光導出口 46逐漸增大之形狀 (參照第4圖〜第6圖）。此外，在同實施形態中，光束引導筒 44具有在上方以外之方向逐漸增大之形狀，以滿足預定法 規(對對向車消除刺眼）。 具體言之，光束引導筒44宜設計成在左右方向（車輛寬 度方向），對光軸Αχ呈角度士40度之範圍内於兩側增大之形 狀，又，設計成在上下方向（車輛高度方向）對光軸Αχ(水平 面）在下方呈0度〜40度之範圍内增大之形狀。 第8Α圖係第6圖之Α-Α截面圖。第8Β圖係第6圖之Β-Β 8 12 201221389 截面圖。 光導入口 45配置成包圍LED41之發光部41a(參照第4圖） 之周圍。同實施形態之發光部41a於左右方向（水平方向、 車輛寬度方向）4個面發光之矩形發光區域配置成直列。因 此，如第8A圖所示，光導入口45具有約長方形狀。另一方 面，如第8B圖所示’光導出口46具有約梯形形狀，而可以 此梯形形狀將光縮小，訂定霧燈1之照明區域。 光束引導筒44具有調整光導出口 46之位置之位置調整 機構50(參照第4圖〜第6圖）。本實施形態之位置調整機構5〇 係調整光導出口 46之上下方向之位置的結構。於光束引導 筒44之下部設有可彈性變形之金屬製平板彈簧51。此平板 彈簧51以螺絲構件52固定於後部蓋30。螺絲構件52係在左 右方向，隔著間隔，成對固定平板彈簧51，以確保光束引 導筒44之水平度之結構。 力一万面，於光束引導筒44之上部設有藉位置調整用 螺絲構件53之旋轉，於其軸方向進退之陰__。螺絲 構件53以旋轉自如之方式支將貫穿後部蓋30之貫穿孔 34。此外’縣構件53於與其頭部隔著後部蓋歡對側設 有防止脫落之圖中未示之凸緣部。根據上述 =從燈室外部繞轴於任意方向旋轉，可使陰： 之：：件53之轴方向進退。如此-來，按陰細 於上下方^束引導筒44以平板彈簧51之固定位置為支點， 圖中，光藉此’可調整光導出叫之位置。此外， 先束引導心4與LED模組43配置成接觸，實際上， 13 201221389 於兩者間形成有調整位置用之微小間隙。 光束引導筒44由鋁材形成。於光束引導筒44之内面側 設有光反射面47。同實施形態之光反射面47以鍍覆處理形 成。此外，光反射面47可以沉積處理形成，亦可藉塗佈光 反射塗佈劑而形成。光反射塗佈劑可適合使用於矽樹脂加 入南反射填料，光擴散能優異，反射率98%，膜厚為1〇〇 左右之光反射塗佈劑（Okitsumo股份有限公司製）。 此外，宜採用在光束引導筒44之内面側，設於上方之 光反射面47與設於下方之光反射面47具有相互不同之光反 射率之結構。根據此結構，可避免在上方之光反射面47反 射之反射光與在下方之光反射面47反射之反射光偏光，而 互相干擾，使照明區域產生條紋狀之圖樣。可改變上方之 光反射面47與下方之光反射面47之表面處理（例如，使上方 之光反射面47之表面處理粗糙）來因應作為用以使上述反 射率不同之手段。 接著，就上述結構之霧燈1之作用作說明。 當將電供至LED41時，發光部41a面發光。如第7圖所 示，由於從LED41發出之光指向性高，故不致繞入背面側’ 而幾乎全部透過光導入口 45，導入至光束引導筒44内。由 於光導入口 45之至少一部份與光導出口 46之至少一部份在 光軸Αχ延伸之方向重疊配置，故沿著光軸Αχ之光量最多之 直射光從光導出口46導出。又，由於光束引導筒44具有隨 著從光導入口 45往光導出口 46，逐漸增大之形狀，故距離 光軸Αχ預定角度内之光量多之光不致撞擊、反射至光束引201221389 VI. Description of the Invention: C. The invention relates to a vehicle headlamp. This case is based on the Japan Special Application No. 2〇10-209502, which was filed in Japan on September 17, 2010. It claims priority and uses its contents here. L· ΖΙ BACKGROUND OF THE INVENTION A vehicle headlamp is a structure that projects light onto a predetermined illumination area in front of a vehicle from the viewpoint of safety. This lighting zone is set according to the specifications of the vehicle or the predetermined regulations. The illumination optical system & metering optics of the vehicle headlamps are used to project light into the defined lighting area. The above-mentioned patent & discloses a vehicle headlamp including a light source, a lens, a reflector, etc. as an illumination optical system. PRIOR ART DOCUMENT PATENT DOCUMENT Patent Document 1 Japanese Patent Laid-Open Publication No. 2007-207528 Patent Document 2 Japanese Patent Laid-Open Publication No. 2010-108637 No. 3 SUMMARY OF THE INVENTION Many time and cost issues. Specifically, an optical design such as alignment of the focus position of the light source, the lens, and the reflector, and concentrating and diffusing of the lens are required. Then, because 3 201221389, the optical design was repeated several times to dozens of times before the development of the product, and the trials and experiments were carried out many times. Therefore, it took a lot of time and cost before the development was completed. The present invention has been made in view of the above problems. SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle headlamp which is easy to optically design and which can achieve a predetermined performance, and which can be used for a short period of time, and which also reduces the cost. Means for Solving the Problem In order to solve the above problems, the following structure is adopted. A vehicle headlamp according to an aspect of the present invention includes a transparent cover, a lamp body, and an illumination optical system. The illumination optical system is housed in the lamp body, and the light is projected through the transparent cover to a predetermined illumination area in front of the vehicle. By. The illumination optical system includes a semiconductor light emitting element and a beam guiding tube, wherein the semiconductor light emitting element is set such that an optical axis faces the transparent cover; the light guiding tube is disposed between the semiconductor light emitting element and the transparent cover, and surrounds the light The illumination area is defined by the circumference of the shaft. According to this configuration, the light having high directivity emitted from the semiconductor light-emitting element is guided by the light guiding cylinder disposed around the optical axis, and is projected through the transparent cover to be projected in a predetermined illumination area in front of the vehicle. The illuminated area is specified by the beam guide. Since the beam guiding cylinder has a simple shape and does not need to be focused as is conventionally known, the degree of freedom of arrangement is high and the design change is easy. Further, since the shape of the opening of the beam guiding cylinder is changed, the irradiation direction, the irradiation range, and the amount of light can be adjusted, so that the predetermined required performance can be easily achieved. Further, the vehicle headlamp may be configured such that the beam guiding cylinder further includes a light introducing hole 201221389 provided on a side where the semiconductor light emitting element is disposed, and a light guiding opening provided on a side where the transparent cover is disposed. Further, at least a portion of the semiconductor inlet and at least a portion of the light guide outlet are arranged to overlap each other in a direction in which the optical axis extends. With such a configuration, since at least a portion of the light introduction port overlaps with at least a portion of the light guide opening in the direction in which the optical axis extends, direct light emitted from the semiconductor light emitting element is directed to the transparent light. Cover and project in the illuminated area. Further, the vehicle headlamp may be configured such that the beam guiding cylinder has a shape in which an opening area gradually increases in a direction other than the upper side from the light introducing port to the light guide opening. According to this configuration, since the light emitted from the semiconductor light-emitting element is radiated and diffused, the opening area of the beam guiding cylinder gradually increases from the light introducing port to the light guiding port, so that the radiation, the diffusion, and the light impact can be reduced. The beam guides the inner surface of the barrel to reduce the loss of light due to the impact. Further, by gradually increasing the beam guiding cylinder in a direction other than the upper direction, the amount of light above can be reduced, and glare can be eliminated for the opposite vehicle. Further, the vehicle headlamp may be configured such that the vehicle headlamp further includes a position adjusting mechanism that adjusts a position of the light guide outlet. With this configuration, even after the beam guiding cylinder is assembled, the adjustment of the irradiation direction can be performed by adjusting the position of the light guiding outlet. Further, the vehicle headlamp may be configured such that a light reflecting surface is provided on the inner surface side of the beam guiding cylinder. According to this configuration, since the light that has collided and diffused against the inner surface of the beam guiding cylinder is reflected by the light reflecting surface and finally led out from the light guiding port, the light of the light can be projected onto the irradiation area without waste. Further, the aforementioned vehicle headlamp may be configured such that the light reflecting surface has a curvature. By adopting such a structure, the light reflecting surface has a curvature, and the diffusion range of the reflected light can be controlled. Further, the vehicle headlamp may be configured such that the light reflecting surface provided on the inner surface side of the beam guiding cylinder and the light reflecting mask provided below are different from each other. By adopting such a configuration, it is possible to prevent the reflected light reflected by the upper light reflecting surface from being polarized by the reflected light reflected from the light reflecting surface below and mutually interfere with each other', and the illumination region can be illuminated in the same manner. Further, the vehicle headlamp may be configured such that an optical axis direction of the semiconductor light emitting element is set downward in a direction lower than a horizontal plane. According to this configuration, since the optical axis of the semiconductor light emitting element is set downward in the direction of the horizontal plane, direct light can be emitted to the illumination area on the road surface, so that the amount of light can be effectively utilized. Further, the vehicular headlamp may be configured such that a lower portion of one end of the light guide tube disposed on the side of the transparent cover has a shape that is notched at a predetermined distance toward the other end portion on the side where the semiconductor light emitting element is disposed. According to this configuration, since the upper side of the beam guiding cylinder is relatively short, the light toward the upper side can be restricted while the amount of light toward the lower side is increased. Further, the vehicle headlamp may be configured such that the shape of the notch is set to be a pair of 201221389 at intervals in the left-right direction in which the optical axis is sandwiched. According to this configuration, the amount of light in the illumination area in the left-right direction can be increased while suppressing the amount of light in the illumination area immediately below the front side of the vehicle. Further, the vehicle headlamp may be configured such that the light guide cylinder has a light introduction port provided on a side where the semiconductor light emitting element is disposed, and a light guide opening provided on a side where the transparent cover is disposed, and the light introduction port and the light introduction port are The semiconductor light emitting element is disposed with a gap left. According to this configuration, light leaks from the gap between the light introducing port and the semiconductor light emitting element, and not only the inside of the beam guiding cylinder but also the outside can be irradiated, and the aesthetic appearance can be improved. Further, the vehicle headlamp may have a light guiding port provided on a side of the semiconductor light emitting element and a light guiding port provided on a side where the transparent cover is disposed, and the beam guiding tube may be The main body portion is formed with a second light guide outlet that leads to a part of the light that is introduced into the inside through the light introduction port. According to this configuration, light is actively leaked from the second light guide opening formed in the body portion of the beam guiding cylinder to the outside, and the aesthetic appearance can be improved. Advantageous Effects of Invention According to the present invention, it is possible to obtain a vehicle headlamp which is easy to obtain an optical design and which can achieve a predetermined performance, and which can be used for a short period of time, and which also reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a car provided with a fog lamp according to an embodiment of the present invention. 7 201221389 Fig. 2 is a cross-sectional view showing the mounting structure of the fog lamp of the same embodiment. Fig. 3 is a perspective view showing the fog lamp of the same embodiment. Fig. 4 is an exploded perspective view showing the fog lamp of the same embodiment. Fig. 5 is a cross-sectional view showing the fog lamp of the same embodiment. Fig. 6 is an exploded cross-sectional view showing the fog lamp of the same embodiment. Figure 7 is a diagram showing the directional characteristics of the LED. Fig. 8A is a cross-sectional view taken along line A-A of Fig. 6. Fig. 8B is a cross-sectional view taken along line B-B of Fig. 6. Fig. 9A is a view showing the shape of an opening of a light guide outlet according to another embodiment of the present invention. Fig. 9B is a view showing the shape of the opening of the light guide outlet according to another embodiment of the present invention. Fig. 9C is a view showing the shape of the opening of the light guide outlet according to another embodiment of the present invention. Fig. 9D is a view showing the shape of the opening of the light guide outlet of another embodiment of the present invention. Fig. 9E is a view showing the shape of the opening of the light guide outlet of another embodiment of the present invention. Fig. 10A is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Fig. 10B is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Figure 11 is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Figure 12 is a front elevational view showing a transparent cover according to another embodiment of the present invention. Figure 13 is a cross-sectional view showing a transparent cover according to another embodiment of the present invention. Figure 14 is a cross-sectional view showing a transparent cover according to another embodiment of the present invention. 201221389 Fig. 15A is a front view showing a fog lamp according to another embodiment of the present invention. Fig. 15B is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Fig. 16A is a front view showing a fog lamp according to another embodiment of the present invention. Fig. 16B is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Figure 17 is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Figure 18 is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Fig. 19 is a bottom plan view showing a beam guiding cylinder according to another embodiment of the present invention. I: Embodiment 3 Mode for Carrying Out the Invention Next, an aspect of an embodiment of the present invention will be described with reference to the drawings. Further, in the following description, the case where the present invention is applied to a fog lamp is exemplified. Fig. 1 is a perspective view showing a car 10 in which a fog lamp 1 according to an embodiment of the present invention is provided. Fig. 2 is a cross-sectional view showing the mounting structure of the fog lamp 1 of the embodiment. As shown in Fig. 1, the bicycle 100 of the same embodiment is provided with a headlight (a headlight for traveling, a headlight for a wrong vehicle) 1 and a fog lamp (front fog lamp) 1 as a headlight for a vehicle. . In addition, the fog lamp 1 is also referred to as an auxiliary headlight. As shown in Fig. 2, the fog lamp 1 is inserted into the recess 103 provided in the front bumper 102, and the bottom of the recess 103 is attached to the rear portion of the fog lamp 1 by the screw member 2. Further, the assembly structure of the fog lamp 1 is not limited to this configuration, and can be appropriately changed depending on the specifications of the vehicle or the like. Fig. 3 is a perspective view showing the fog lamp 1 of the same embodiment. Fig. 4 is an exploded perspective view showing the fog lamp 1 of the same embodiment. Fig. 5 is a cross-sectional view showing the fog lamp cymbal in the same manner as in the embodiment ^1221389. Decompose the section view. The figure shows that the fog lamp 1 of the same embodiment is formed as a fog light 1 and a transparent cover and a rear (4) illumination optical system. From #(四) Directional lights 赗川 is formed from extruded materials. The pipe is cut at a predetermined length, in other words, by the body body 1G which is formed by the extrusion. In addition, in the same embodiment, etc., according to the specifications of the vehicle, the 1 (four) (four) shape or the quadrangular shape of the tube is to be taken from the illumination optical system. The lamp body 10 can also function as a function. The color _ 氡 处 散热器 使 使 使 使 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器 散热器The money has a fitting angle R1 along the end-side opening 11 . The transparent cover 20 is attached to the lamp body 10 to prevent foreign matter (water, dust, mud, etc.) from invading the lamp f. This transparent (four) is formed of a glass material, a resin material, or the like, and is configured to project light toward the front of the vehicle. The rear cover 30 is attached in a state of covering the other end side opening 12 of the lamp body 10. The rear cover 20 has another along the other. The fitting portion 31 of the inner surface of the one end side opening 12. The rear cover 30 is fixed to the lamp body 10 by a screw member, not shown, or a screw member (not shown). The rear cover 3 supports the structure of the illumination optical system 40. Further, the rear cover 30 has a function as to be emitted from the illumination optical system 4 The function of discharging the radiator to the outside of the lamp. 201221389 The rear cover 30 is formed of a heat conducting member that at least partially transmits the heat emitted from the illumination optical system 40. In the same embodiment, the rear cover 30 is made of black _ The extreme oxidation treatment is carried out to improve the heat dissipation characteristics of the material. In the following, the 30-shaped reduction is used to make the lamp (4) completely ventilating holes 32 (refer to Fig. 4). According to the above structure, the heat of the LED module 43 is transmitted to the rear. The cover 30 is dissipated to the outside, and the lamp body 10' whose heat conduction to the rear cover 3 () is larger to the surface area (heat dissipation area) is further radiated to the outside. Therefore, the luminous efficiency of the "port" can be prevented from rising due to temperature rise. reduce. In addition, a through hole (not shown) is formed in any one of the lamp body 10 and the rear cover 30 to include a wire group not shown in the figure including a power cable electrically connected to the illumination optical system 4 Import into the lamp room. The illumination optical system 40 is composed of an LED module 43 having an LED (semiconductor light-emitting element) 41 and a substrate 42, and a beam guiding cylinder 44. A line group not shown in the drawing is electrically connected to the LED 41 by the substrate 42. The LED module 43 is fixed to the rear cover 30 by a screw member 33 via a heat-dissipating grease (in the same embodiment, a resin grease). Further, as shown in Fig. 5, the optical axis LED of the LED 41 is set toward the transparent cover 20. Further, as shown in Fig. 4, the LED 41 of the same embodiment has four light-emitting portions 41a which are arranged in a rectangular light-emitting region in which the surface is arranged to emit light in the horizontal direction (horizontal direction and vehicle width direction), and the light referred to here is The axis Αχ refers to the optical axis at the center of the light-emitting portion 41a as one light source. Figure 7 is a diagram showing the directional characteristics of the LED. In addition, the directional characteristics of the LEDs shown in the figure are disclosed in detail in the non-patent literature (Source: Yamazaki Hiroshi, Energy LED/EL Lighting Design Entry, Nikkan Industrial News, 2010). As shown in Fig. 7, LED41 has higher directivity and low diffusivity compared to conventional light bulbs (light bulbs). Specifically, when the relative angle of the optical axis Αχ (radiation angle 0 degrees) is 1, the relative contrast is maintained at 0.8 until the radiation angle is about 30 degrees. Also, when the radiation angle exceeds 30 degrees, the contrast is sharply lowered. The beam guiding cylinder 44 is disposed between the LED 41 and the transparent cover 20, and surrounds the periphery of the optical axis to define the structure of the illumination region of the fog lamp 1. Specifically, the beam guiding cylinder 44 defines the illumination area of the fog lamp 1 to satisfy the predetermined regulations (security standards, ECE rules, etc.). The beam guiding cylinder 44 has a light introducing port 45 provided on the side where the LED 41 is disposed, and a light guiding port 46 provided on the side where the transparent cover 2 is disposed. At least a portion of the light introduction port 45 and at least a portion of the light guide outlet 46 are disposed to overlap each other in the direction in which the optical axis Αχ extends. According to this configuration, since the light emitted from the LED 41 has the above-described directivity characteristic, the direct light of a large amount of light is guided to the transparent cover 20 and projected onto the predetermined area. Further, the beam guiding cylinder 44 has a shape in which the opening area gradually increases from the light introducing port 45 to the light guiding port 46 in accordance with the above-described directivity characteristic of the LED 41 (refer to Figs. 4 to 6). Further, in the same embodiment, the beam guiding cylinder 44 has a shape which gradually increases in directions other than the upper direction to satisfy a predetermined rule (eliminating glare for the opposite vehicle). Specifically, the beam guiding cylinder 44 is preferably designed to have a shape that increases in both directions in the left-right direction (vehicle width direction) in the range of an angle of 40 degrees to the optical axis, and is designed to be in the up and down direction (vehicle height). Direction) The shape in which the optical axis Αχ (horizontal plane) is increased from 0 degrees to 40 degrees below. Figure 8 is a cross-sectional view of Figure 6 - Α. Figure 8 is a diagram of Figure 6 - Β 8 12 201221389 Sectional view. The light introduction port 45 is disposed to surround the periphery of the light-emitting portion 41a (see Fig. 4) of the LED 41. The rectangular light-emitting regions in which the light-emitting portions 41a of the embodiment are illuminated in four directions in the horizontal direction (horizontal direction and vehicle width direction) are arranged in series. Therefore, as shown in Fig. 8A, the light introduction port 45 has a rectangular shape. On the other hand, as shown in Fig. 8B, the light guide outlet 46 has a trapezoidal shape, and the trapezoidal shape can reduce the light to define the illumination area of the fog lamp 1. The beam guiding cylinder 44 has a position adjusting mechanism 50 for adjusting the position of the light guide outlet 46 (see Figs. 4 to 6). The position adjusting mechanism 5 of the present embodiment is configured to adjust the position of the light guide outlet 46 in the vertical direction. An elastically deformable metal flat spring 51 is provided at a lower portion of the beam guiding cylinder 44. This flat spring 51 is fixed to the rear cover 30 by a screw member 52. The screw member 52 is fixed in the left-right direction with the spacers fixed in pairs at intervals to ensure the horizontal structure of the beam guiding cylinder 44. The force is 10,000 Å, and the rotation of the screw member 53 for position adjustment is provided on the upper portion of the beam guiding cylinder 44, and the y__ is advanced and retracted in the axial direction. The screw member 53 is rotatably supported to penetrate the through hole 34 of the rear cover 30. Further, the 'counterfeit member 53 is provided with a flange portion (not shown) on the opposite side of the rear cover from the head. According to the above = rotation from the outside of the lamp shaft in any direction, the axis of the negative:: member 53 can advance and retreat. In this way, the beam guiding guide 44 is supported by the fixed position of the flat spring 51 as a fulcrum, and the light is thereby adjusted to derive the position. In addition, the first beam guiding core 4 and the LED module 43 are disposed in contact with each other. In fact, 13 201221389 forms a small gap for adjusting the position therebetween. The beam guiding cylinder 44 is formed of an aluminum material. A light reflecting surface 47 is provided on the inner surface side of the beam guiding cylinder 44. The light reflecting surface 47 of the same embodiment is formed by a plating process. Further, the light reflecting surface 47 may be formed by a deposition process or may be formed by applying a light reflecting coating agent. The light-reflecting coating agent can be suitably used as a light-reflecting coating agent (manufactured by Okitsum Co., Ltd.) which is excellent in light diffusion energy, has a reflectance of 98%, and has a film thickness of about 1 Å. Further, it is preferable to adopt a configuration in which the light reflecting surface 47 provided above and the light reflecting surface 47 provided below have mutually different light reflectances on the inner surface side of the beam guiding cylinder 44. According to this configuration, it is possible to prevent the reflected light reflected by the upper light reflecting surface 47 from being polarized by the reflected light reflected by the light reflecting surface 47 below, and interfere with each other to cause a streak pattern in the illumination region. The surface treatment of the upper light reflecting surface 47 and the lower light reflecting surface 47 (for example, roughening the surface treatment of the upper light reflecting surface 47) can be changed as a means for making the above-described reflectance different. Next, the action of the fog lamp 1 of the above configuration will be described. When electricity is supplied to the LED 41, the light-emitting portion 41a is illuminated. As shown in Fig. 7, since the light emitted from the LED 41 is highly directional, it is not wound around the back side, and is almost completely transmitted through the light introducing port 45, and is introduced into the beam guiding cylinder 44. Since at least a portion of the light introducing port 45 and at least a portion of the light guiding port 46 are arranged to overlap each other in the direction in which the optical axis Αχ extends, direct light having the largest amount of light along the optical axis 导出 is led out from the light guiding outlet 46. Further, since the beam guiding cylinder 44 has a shape which gradually increases from the light introducing port 45 to the light guiding port 46, the light having a large amount of light within a predetermined angle from the optical axis 不 does not collide and is reflected to the beam guide.
14 201221389 導筒44之内面’而作為直射光從光導出口46導出。又，放 射角度大，撞擊光束引導筒44之内面之光量少的光等也以 光反射面47反射’最後，從光導出口 46導出。 從光導出口 46導出之直射光及反射光透過透明蓋2〇， 投射於車輛前方之預定照明區域。光導出口 46具有規定霧 燈1之照明區域之形狀。具體言之，光導出口 46之開口形狀 依據預定之法規’具有縮小上方’擴大下方之梯形形狀。 因而，根據同實施形態之霧燈1，可在不對對向車造成刺眼 下，以寬幅照明車輛前方，而滿足預定法規。此外，由於 於霧燈1設有調整光導出口 46之位置之位置調整機5〇，故即 使將光束引導筒44組裝於燈室内後，藉從外部使螺絲構件 53旋轉，仍可進行照射方向之微調整。 又，由於同實施形態照明光學系統40因設光束引導管 44，而不具透鏡，故無因通過此透鏡而引起之光損失。又， 由於藉投射直射光，光程長亦縮短，故光量之損失較習知 少。再者，藉光反射面47，可將在LED41發光之光不浪費 地投射於照射區域。因此，可提供能源效率佳之高效率霧 鏡1。 又’由於當能源效率提尚時’即使於低輸出之LED41 變更設計，亦可達成預定之要求性能，故有助於成本低廉。 再者，當能源效率提高時，也有助於霧燈1之小型化。小型 化可擴大設計面之自由度，並且，也對車輛布置之自由度 擴大有貢獻。 在照明光學系統40之光學設計中，由於LED4丨相較於 15 201221389 習知之燈泡式光源，可使發光面積縮小集中，故可易規定 照射方向及照射範圍。 又，由於光束引導筒44形狀簡單，且不需如習知般進 行對焦，故配置之自由度高，設計變更容易。此外，由於 藉將光束引導筒44之光導出口 46之形狀變更設計，可調整 照射方向、照射範圍、光量，故可易達成預定之要求性能。 因而，根據同實施形態，可在無複雜之透鏡之光學設 計下，進行滿足法規之配光特性。因此，在同實施形態中， 可獲得光學設計容易，而可達成預定之性能，且試作、實 驗也為短期間，費用負擔亦可減少之霧燈1。 以上，一面參照圖式，一面就本發明之較佳之實施形 態作了說明，本發明非限於上述實施形態者。在上述實施 形態中所示之各構成構件之諸形狀或組合等為一例，在不 脫離本發明之主旨之範圍，可依據設計要求等，進行各種 變更。 舉例言之，在上述實施形態中，說明了光導出口46之 開口形狀為第8B圖所示之梯形形狀，而本發明非限於此結 構者，只要滿足預定法規，亦可為第9A圖〜第9E圖所示之 結構。 舉例言之，如第9A圖所示，光導出口46亦可為較上述 實施形態縮小上下方向，而於左右方向擴張之形狀。又， 光導出口 46亦可如第9B圖所示，為光導入口 45之相似形 狀。又，光導出口 46亦可如第9C圖所示，為照明車輛前方 前面側，而為將第9B圖之開口形狀於下方擴張之形狀。又， 16 201221389 光導出口 46亦可如第9D圖所示，不欲使光傳達至對向車 時’為截斷對向車側（道路中央侧）之形狀。又，光導出口 46 亦可如第9E圖所示，為於上下方向具有短邊，左右方向具 有長邊之長方形。又，對應於第9E圖’光導入口 45之形狀 亦可為與此長方形相似之長方形。又，亦可為使上述長方 形之角部圓，而使其具有曲率之結構。 又’舉例言之，在上述實施形態中，光束引導筒44之 光反射面47之形狀係就如第5圖所示，為直線狀之結構作了 說明，本發明不限於此結構。 舉例言之’如第10A圖、第10B圖所示，藉於上側之光 反射面47a及下側之光反射面47b附加預定曲率，可控制反 射光之擴散範圍。此在左右側面之光反射面47也可謂相 同。此外’根據第10A圖，上側之光反射面47a具有向上凸 起之形狀’下側之光反射面具有向下凸起之形狀。又，根 據第10B圖’上側之光反射面47a具有向上凸起之形狀，下 侧之光反射面也具有向上凸起之形狀。 又’舉例言之，在上述實施形態中，就光軸Αχ為設定 於沿著水平面之方向之結構作了說明，但本發明非限於此 結構者。 舉例言之，如第11圖所示，將LED41之光軸Αχ朝比沿 著水平面之方向下方而設定。根據此結構，由於藉將光軸 Ax朝向比沿著水平面之方向下方設定，光軸八乂可朝向路 面，投射直射光，故可有效利用光量。光軸Αχ因第7圖所示 之LED之指向特性，以對水平面在下方呈〇度〜40度之範圍 17 201221389 内之角度設定為有效。此外，將本發明一態樣應用於霧燈 時，要滿足預定法規，將光軸Αχ以下方2.5度之角度設定最 適合。 又，舉例言之，在上述實施形態中，就透明蓋20正面 觀看為圓形之結構作了說明，本發明不限於此結構。透明 蓋20因僅為單純之防水及防塵埃，故藉形成為以下所示之 結構，可易進行外觀美感之提高、差別化。 舉例言之，如第12圖所示，亦可令透明蓋20之形狀大 於燈體10，正面觀看為橢圓形。又，亦可如第13圖所示， 於透明蓋20加上角度，而作為傾斜蓋，使之對應於保險槓 之曲部等。又，亦可如第14圖所示，為於透明蓋20之内側 形成沉積層22，發出光澤之結構。此外，此沉積層22係金 屬（例如銦）粒以海島狀配置於透明蓋20之内側而構成，而形 成為可從此金屬粒之間隙投射LED41之光之結構。又，亦 可為使透明蓋20之外徑配合圓形管狀燈體10之外徑之形狀。 又，舉例言之，在上述實施形態中，就以光束引導筒 44將來自LED41之幾乎所有光導引至前方之結構作了說 明，本發明不限於此結構。當為以光束引導筒44將來自 LED41之幾乎所有光導引至前方之結構時，在正面觀看， 在與光導出口46對向之區域以外之區域（光束引導筒44之 外部）形成為幾乎未發光之狀態。 是故，如第15Β圖所示，藉將光導入口 45與LED41隔著 間隙配置，從此間隙漏出適量光，不僅照射光束引導筒44 之内部，亦照射外部，而如第15Α圖所示，可使正面觀看之 18 201221389 外觀美感及被目視辨認性提高。 此外，在第15A圖中，以點之濃淡顯示光之強度。 又，如第16B圖所示，藉於光束引導筒44之本體部形成 將透過光導入口乜導入至内部之光之一部份導出至外部之 第2光導出口 48，積極地將光漏出至外部，亦可使正面觀看 之外觀美感及被目視辨認性提高。再者，若於透明蓋2〇設 環狀螢光體23，可簡單地作出環狀照明效果。又，亦可為 藉調整第2光導出口 48之形成位置，將光積極地導引至螢光 體23之結構。 此外，亦可如第17圖所示，進一步設將漏出至光束引 導筒44之外部之光朝螢光體23積極地反射之光反射面24。 又，舉例言之，如第18圖所示，亦可為鑽研光束引導 筒44之形狀，而使朝向下側之光之光量增加之結構。具體 言之，光束引導筒44之配置透明蓋20之側（光導出口 46側） 之一端部的下部60為具有朝配置LED41之側（光導入口 45側) 之另一端部在預定距離缺口之形狀61之結構。根據此結 構，由於對光束引導筒44之上側，下側相對地縮短，故可 一面限制朝向上側之光’一面使朝向下側之光之光量增 加，而可更易因應預定之法規。 又，舉例言之，亦可如第19圖所示，為鑽研設缺口之 形狀61之位置，而使之滿足預定法規之結構。第19圖係光 束引導筒44之底面圖。具體言之，缺口之形狀61設置成在 包夾著光軸Αχ之左右方向隔著間隔而成對。此外，缺口之 形狀61之間隔設定為對光軸Αχ於左右方向呈±1〇度之角度 19 201221389 以上。此係因在法規中，車輛前方正下方之士10度之角度之 範圍内之照明區域的光量限制在某一定光量之故。因而， 根據此結構，藉一面抑制車輛前方正下方之照明區域之光 量，一面使其左右方向之照明區域之光量增加，可滿足預 定法規。 又，舉例言之，在上述實施形態中，就將本發明應用 於霧燈1之結構作了說明，本發明亦可應用於其他車輛用前 照燈，例如頭燈。 產業上之可利用性 根據本發明，可獲得光學設計容易，而可達成預定性 能，試作、實驗也為短期間，費用負擔也少之車輛用前照 燈。具體言之，根據本發明之一態樣，從半導體發光元件 發出之指向性高之光以配置於其光軸周圍之光束引導筒引 導，透過透明蓋，投射於車輛前方之預定照明區域。照明 區域以光束引導筒規定。由於此光束引導筒形狀簡單，而 不需如習知般進行對焦，故配置之自由度高，設計變更容 易。此外，由於藉將光束引導筒之開口形狀變更設計，可 調整照射方向、照射範圍、光量，故可易達成預定之要求 性能。 【圖式簡單說明】 第1圖係顯示設有本發明一實施形態之霧燈之轎車的 立體圖。 第2圖係顯示同實施形態之霧燈之安裝構造的截面圖。 第3圖係顯示同實施形態之霧燈之立體圖。14 201221389 The inner face of the guide bush 44 is taken out as direct light from the light guide outlet 46. Further, when the radiation angle is large, light having a small amount of light hitting the inner surface of the beam guiding cylinder 44 is also reflected by the light reflecting surface 47. Finally, it is led out from the light guiding outlet 46. The direct light and the reflected light that are led out from the light guide outlet 46 pass through the transparent cover 2 and are projected onto a predetermined illumination area in front of the vehicle. The light guide outlet 46 has a shape that defines the illumination area of the fog lamp 1. Specifically, the shape of the opening of the light guide outlet 46 has a trapezoidal shape that expands downward according to a predetermined rule 'has reduced the upper side'. Therefore, according to the fog lamp 1 of the embodiment, it is possible to illuminate the front of the vehicle with a wide width without causing glare to the opposite vehicle, and the predetermined regulations can be satisfied. Further, since the position adjusting machine 5A for adjusting the position of the light guide outlet 46 is provided in the fog lamp 1, even if the beam guiding cylinder 44 is assembled in the lamp chamber, the screw member 53 can be rotated from the outside to perform the irradiation direction. Micro adjustment. Further, since the illumination optical system 40 of the embodiment is provided with the light guide tube 44 and does not have a lens, there is no light loss caused by the lens. Moreover, since the optical path length is also shortened by projecting direct light, the loss of the amount of light is less than conventionally known. Further, by the light reflecting surface 47, the light emitted by the LED 41 can be projected onto the irradiation area without waste. Therefore, an energy efficient high efficiency fog mirror 1 can be provided. In addition, when the energy efficiency is increased, even if the LED 41 of the low output is changed in design, the predetermined required performance can be achieved, which contributes to low cost. Furthermore, when the energy efficiency is improved, the miniaturization of the fog lamp 1 is also facilitated. Miniaturization increases the freedom of the design surface and contributes to the expansion of the freedom of vehicle layout. In the optical design of the illumination optical system 40, since the LEDs are smaller than the conventional bulb-type light source of the Japanese Patent Publication No. 201221389, the illumination area can be reduced and concentrated, so that the illumination direction and the illumination range can be easily specified. Further, since the beam guiding cylinder 44 has a simple shape and does not need to be focused as is conventional, the degree of freedom of arrangement is high and the design change is easy. Further, since the shape of the light guide opening 46 of the beam guiding cylinder 44 is changed, the irradiation direction, the irradiation range, and the amount of light can be adjusted, so that the predetermined required performance can be easily achieved. Therefore, according to the same embodiment, the light distribution characteristics satisfying the regulations can be performed without the optical design of the complicated lens. Therefore, in the same embodiment, it is possible to obtain a fog lamp 1 in which the optical design is easy, and the predetermined performance can be achieved, and the trial and the experiment are also short-term and the cost burden can be reduced. The preferred embodiments of the present invention have been described above with reference to the drawings, and the present invention is not limited to the embodiments described above. The shapes and combinations of the constituent members shown in the above-described embodiments are merely examples, and various modifications can be made depending on the design requirements and the like without departing from the scope of the invention. For example, in the above embodiment, the shape of the opening of the light guide outlet 46 is a trapezoidal shape as shown in FIG. 8B, and the present invention is not limited to this configuration, and may be the 9A to the The structure shown in Figure 9E. For example, as shown in Fig. 9A, the light guide outlet 46 may have a shape that is reduced in the vertical direction as compared with the above embodiment and expanded in the left and right direction. Further, the light guide outlet 46 may have a similar shape to the light introduction port 45 as shown in Fig. 9B. Further, as shown in Fig. 9C, the light guide outlet 46 may have a shape in which the opening shape of Fig. 9B is expanded downward as shown in the front side of the vehicle. Further, 16 201221389 The light guide outlet 46 can also be in the shape of the cut-off opposite vehicle side (the center of the road) when the light is not transmitted to the opposite vehicle as shown in Fig. 9D. Further, as shown in Fig. 9E, the light guide outlet 46 may have a short side in the up and down direction and a rectangular shape having a long side in the left and right direction. Further, the shape corresponding to the light introduction port 45 of Fig. 9E may be a rectangle similar to the rectangle. Further, it is also possible to have a structure in which the corner portion of the rectangular shape has a curvature. Further, in the above-described embodiment, the shape of the light reflecting surface 47 of the light guiding barrel 44 is as shown in Fig. 5, and is a linear structure. The present invention is not limited to this configuration. For example, as shown in Figs. 10A and 10B, the diffusion range of the reflected light can be controlled by adding a predetermined curvature to the upper light reflecting surface 47a and the lower light reflecting surface 47b. The light reflecting surface 47 on the left and right sides can also be said to be the same. Further, according to Fig. 10A, the light reflecting surface 47a of the upper side has the shape of the upward convex shape, and the light reflecting surface of the lower side has a downward convex shape. Further, the light reflecting surface 47a on the upper side of Fig. 10B has a shape convex upward, and the light reflecting surface on the lower side also has an upward convex shape. Further, in the above embodiment, the configuration in which the optical axis 设定 is set in the direction along the horizontal plane has been described, but the present invention is not limited to this configuration. For example, as shown in Fig. 11, the optical axis of the LED 41 is set to be lower than the direction along the horizontal plane. According to this configuration, since the optical axis Ax is set to be lower than the direction along the horizontal plane, the optical axis gossip can be directed toward the road surface, and direct light is projected, so that the amount of light can be effectively utilized. The optical axis is set to be effective for the angle of the LED in the range of ~40 degrees below the horizontal plane due to the directional characteristics of the LED shown in Fig. 7. Further, when an aspect of the present invention is applied to a fog lamp, it is preferable to set the angle of 2.5 degrees below the optical axis to satisfy the predetermined regulations. Further, by way of example, in the above embodiment, the structure in which the front surface of the transparent cover 20 is circular is described, and the present invention is not limited to this configuration. Since the transparent cover 20 is only simple in waterproofing and dustproof, it can be easily formed and improved in appearance by the structure shown below. For example, as shown in Fig. 12, the shape of the transparent cover 20 may be made larger than that of the lamp body 10, and the front view is elliptical. Further, as shown in Fig. 13, the transparent cover 20 may be angled to be used as an inclined cover to correspond to a curved portion of the bumper or the like. Further, as shown in Fig. 14, a deposited layer 22 may be formed on the inner side of the transparent cover 20 to give a glossy structure. Further, the deposited layer 22 is formed by arranging metal (e.g., indium) particles on the inner side of the transparent cover 20 in an island shape, and is formed into a structure in which light of the LED 41 can be projected from the gap of the metal particles. Further, the outer diameter of the transparent cover 20 may be matched to the outer diameter of the circular tubular lamp body 10. Further, by way of example, in the above embodiment, the configuration in which the light guiding cylinder 44 guides almost all of the light from the LED 41 to the front is explained, and the present invention is not limited to this configuration. When the light guide cylinder 44 guides almost all of the light from the LED 41 to the front, it is formed in a region other than the region opposed to the light guide outlet 46 (the outside of the light guiding cylinder 44) when viewed from the front. The state of illumination. Therefore, as shown in Fig. 15, by arranging the light introducing port 45 and the LED 41 with a gap therebetween, an appropriate amount of light is leaked from the gap, and not only the inside of the beam guiding cylinder 44 but also the outside is irradiated, as shown in Fig. 15 It can make the front view 18 201221389 look beautiful and be visually recognized. Further, in Fig. 15A, the intensity of light is indicated by the shade of dots. Further, as shown in Fig. 16B, the main portion of the beam guiding cylinder 44 forms a second light guiding outlet 48 which is led out to a part of the light which is introduced into the inside through the light introducing port, and actively leaks light to Externally, it also allows the front view to be aesthetically pleasing and visually enhanced. Further, if the annular phosphor 23 is provided on the transparent cover 2, the annular illumination effect can be easily made. Further, it is also possible to actively guide the light to the structure of the phosphor 23 by adjusting the position at which the second light guide outlet 48 is formed. Further, as shown in Fig. 17, a light reflecting surface 24 for actively reflecting light leaking out of the beam guiding cylinder 44 toward the phosphor 23 may be further provided. Further, as an example, as shown in Fig. 18, the shape of the beam guiding cylinder 44 may be drilled, and the amount of light toward the lower side may be increased. Specifically, the lower portion 60 of one end of the beam guiding cylinder 44 on the side of the transparent cover 20 (on the side of the light guide outlet 46) has the other end portion facing the side on which the LED 41 is disposed (on the side of the light introducing port 45) at a predetermined distance. The structure of the shape 61. According to this configuration, since the lower side is relatively shortened on the upper side of the beam guiding cylinder 44, the amount of light toward the lower side can be increased while restricting the light toward the upper side, and the predetermined regulation can be more easily handled. Further, as an example, as shown in Fig. 19, the position of the shape of the notch 61 may be drilled to satisfy the structure of the predetermined regulations. Fig. 19 is a bottom view of the beam guiding cylinder 44. Specifically, the shape of the notch 61 is set to be opposed to each other at intervals in the left-right direction in which the optical axis 包 is sandwiched. Further, the interval of the shape of the notch 61 is set to an angle of ±1 对 to the left and right direction of the optical axis 19 201221389 or more. This is because in the regulation, the amount of light in the illumination area within a range of 10 degrees from the front of the vehicle is limited to a certain amount of light. Therefore, according to this configuration, by suppressing the amount of light in the illumination area immediately below the front side of the vehicle, the amount of light in the illumination area in the left-right direction is increased, and the predetermined regulations can be satisfied. Further, by way of example, in the above embodiment, the structure in which the present invention is applied to the fog lamp 1 has been described, and the present invention is also applicable to other vehicle headlamps such as a headlight. Industrial Applicability According to the present invention, it is possible to obtain a vehicle headlamp which is easy to obtain an optical design and which can achieve a predetermined performance, and which has a short trial period and a low cost. Specifically, according to an aspect of the present invention, light having high directivity emitted from the semiconductor light-emitting element is guided by a beam guiding cylinder disposed around the optical axis thereof, and is projected through a transparent cover to a predetermined illumination region in front of the vehicle. The illumination area is specified by the beam guiding cylinder. Since the beam guiding cylinder has a simple shape and does not need to be focused as is conventionally known, the degree of freedom of arrangement is high and the design change is easy. Further, since the shape of the opening of the beam guiding cylinder is changed, the irradiation direction, the irradiation range, and the amount of light can be adjusted, so that the predetermined required performance can be easily achieved. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a car provided with a fog lamp according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing a mounting structure of a fog lamp of the same embodiment. Fig. 3 is a perspective view showing the fog lamp of the same embodiment.
20 201221389 第4圖係顯示同實施形態之霧燈之分解立體圖。 第5圖係顯示同實施形態之霧燈之截面圖。 第6圖係顯示同實施形態之霧燈之分解截面圖。 第7圖係顯示LED之指向特性之圖。 第8A圖係第6圖之A-A截面圖。 第8B圖係第6圖之B-B截面圖。 第9A圖係顯示本發明另一實施形態之光導出口之開口 形狀的圖。 第9B圖係顯示本發明另一實施形態之光導出口之開口 形狀的圖。 第9C圖係顯示本發明另一實施形態之光導出口之開口 形狀的圖。 第9D圖係顯示本發明另一實施形態之光導出口之開口 形狀的圖。 第9E圖係顯示本發明另一實施形態之光導出口之開口 形狀的圖。 第10A圖係顯示本發明另一實施形態之霧燈之截面圖。 第10 B圖係顯示本發明另一實施形態之霧燈之截面圖。 第11圖係顯示本發明另一實施形態之霧燈之截面圖。 第12圖係顯示本發明另一實施形態之透明蓋之正面圖。 第13圖係顯示本發明另一實施形態之透明蓋之截面圖。 第14圖係顯示本發明另一實施形態之透明蓋之截面圖。 第15A圖係顯示本發明另一實施形態之霧燈之正面圖。 第15B圖係顯示本發明另一實施形態之霧燈之截面圖。 21 201221389 第16A圖係顯示本發明另- 一實施形態之霧燈之正面圖。 第16B圖係顯示本發明另- -實施形態之霧燈之截面圖。 第17圖係顯示本發明另一 實施形態之霧燈之截面圖。 第18圖係顯示本發明另一 實施形態之霧燈之截面圖。 第19圖係顯示本發明另一 實施形態之光束引導筒之底 面圖。 【主要元件符號說明】 1...霧燈 44...光束引導筒 2，52...螺絲構件 45...光導入口 10...燈體 46...光導出口 11...一端部側開口 47...光反射面 12...另一端部側開口 47a...上側之光反射面 20...透明蓋 47b...下側之光反射面 21，31...嵌合部 48...第2光導出口 22...沉積層 50...位置調整機構 23...螢光體 51...平板彈簧 24...光反射面 53...位置調整用螺絲構件 30...後部蓋 54...陰螺旋部 32...透氣孔 60...下部 34...貫穿孔 61...缺口之形狀 40...照明光學系統 100...騎車 41 …LED 101...頭燈 41a...發光部 102…前保險槓 42...基板 103...凹部 43…LED模組 Αχ...光車由 2220 201221389 Fig. 4 is an exploded perspective view showing the fog lamp of the same embodiment. Fig. 5 is a cross-sectional view showing the fog lamp of the same embodiment. Fig. 6 is an exploded cross-sectional view showing the fog lamp of the same embodiment. Figure 7 is a diagram showing the directional characteristics of the LED. Fig. 8A is a cross-sectional view taken along line A-A of Fig. 6. Fig. 8B is a cross-sectional view taken along line B-B of Fig. 6. Fig. 9A is a view showing the shape of an opening of a light guide outlet according to another embodiment of the present invention. Fig. 9B is a view showing the shape of the opening of the light guide outlet according to another embodiment of the present invention. Fig. 9C is a view showing the shape of the opening of the light guide outlet according to another embodiment of the present invention. Fig. 9D is a view showing the shape of the opening of the light guide outlet of another embodiment of the present invention. Fig. 9E is a view showing the shape of the opening of the light guide outlet of another embodiment of the present invention. Fig. 10A is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Fig. 10B is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Figure 11 is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Figure 12 is a front elevational view showing a transparent cover according to another embodiment of the present invention. Figure 13 is a cross-sectional view showing a transparent cover according to another embodiment of the present invention. Figure 14 is a cross-sectional view showing a transparent cover according to another embodiment of the present invention. Fig. 15A is a front view showing a fog lamp according to another embodiment of the present invention. Fig. 15B is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. 21 201221389 Fig. 16A is a front view showing a fog lamp according to another embodiment of the present invention. Fig. 16B is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Figure 17 is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Figure 18 is a cross-sectional view showing a fog lamp according to another embodiment of the present invention. Fig. 19 is a bottom plan view showing a beam guiding cylinder according to another embodiment of the present invention. [Description of main component symbols] 1...Fog light 44...beam guiding cylinder 2,52...screw member 45...light introducing port 10...light body 46...light guide outlet 11... One end side opening 47...light reflecting surface 12...the other end side opening 47a...the upper side light reflecting surface 20...the transparent cover 47b...the lower side light reflecting surface 21,31.. The fitting portion 48...the second light guide outlet 22...the deposition layer 50...the position adjustment mechanism 23...the phosphor 51...the flat spring 24...the light reflecting surface 53...the position Adjusting screw member 30... Rear cover 54... Female spiral portion 32... Ventilation hole 60... Lower portion 34... Through hole 61... Notch shape 40... Illumination optical system 100. ..Bicycle 41 ...LED 101...Headlight 41a...Lighting part 102...Front bumper 42...Substrate 103...Recess 43...LED moduleΑχ...Lighting by 22