201033064 六、發明說明： 【發明所屬之技術領域】 本發明是關於機車的位置燈及燈光裝置，尤其是關於 ，用來提升從車體前方觀察的辨識性的機車的位置燈及燈 光裝置。 【先前技術】 _ 在機車除了具備有頭燈或方向燈之外，還具備有位置 燈。在專利文獻1所揭示的頭燈裝置，是集中配置有頭燈 、方向燈及位置燈。該頭燈裝置，是在頭燈燈泡前面設置 遮光壁，在該遮光壁的左右配置透鏡，讓從頭燈發出的光 僅通過左右透鏡而照射前方。在專利文獻1，舉例出作爲 該頭燈裝置的效果，是使用單一光源（頭燈燈泡），而能辨 識成具有複數光源。 該習知的頭燈裝置，是鄰接於頭燈部的左右配置位置 • 燈，且在其兩側配置方向燈的構造。 [先其技術文獻] [專利文獻] [專利文獻1] 日本特開2008-9 1 1 78號公報 【發明內容】 [發明欲解決的課題] 藉由專利文獻1所提案的裝置，是將多轉個燈具集中 -5- 201033064 配置’所以優點是能一次完成：將以其他步驟組裝好的頭 燈裝置組裝到車體的作業。 專利文獻1記載的頭燈，是將原本一個燈即可的頭燈 ’利用該設計效果，而能看成有兩個燈的方式。也就是說 ’對於一燈方式的頭燈沒有光源數量的減低效果。另一方 面’具有作爲車寬燈的功能的位置燈，需要至少在車寬方 向左右各配置兩個燈。在專利文獻1也顯示了這種位置燈 的配置。也就是在習知裝置，位置燈燈泡仍然需要兩個， 而被要求要減少位置燈燈泡的數量。而習知的位置燈只有 位置燈燈泡與其附近的反射鏡部分是發光的，而要求要以 簡易的構造更加大發光的範圍。 因此，希望能提高位置燈的辨識性，且將本質上需要 複數個的位置燈的光源作成單一個而能減少成本。 本發明的目的，是對於上述課題，要提供一種位置燈 及包含該位置燈的燈光裝置，能提高辨識性且減少光源數 [用以解決課題的手段] 用以達成上述目的的本發明，是在機車的位置燈，其 第一特徵爲：是具備有：在設置於車體前部的前外殼上， 配置於車寬方向中央部的位置燈燈泡、安裝於上述前外殼 ’從車體前方覆蓋上述位置燈燈泡的光源外殼、將從上述 位置燈燈泡發出的光朝向車寬方向兩側導引的細長形狀的 導光部、以及沿著上述導光部設置於該導光部的前面的透 -6- 201033064 鏡。 本發明，第二特徵爲：上述導光部 燈燈泡的位置對應的中央部朝向車寬方 〇 本發明，第三特徵爲：上述導光部 、與反射鏡所圍繞的空洞所構成，上述 蓋該透鏡，具有：將來自位置燈燈泡的 Φ 車寬方向反射的反射面。 本發明，第四特徵爲：包含有：具 特徵的位置燈，並且在較上述位置燈更 分離於該位置燈配置的頭燈。 本發明，第五特徵爲：上述頭燈， ，該車把外殼位於較上述前外殼更上方 本發明，第六特徵爲：上述位置燈 ，延伸至：相較於通過上述頭燈的車寬 Φ 更靠近車寬方向外側處。 [發明效果] 藉由具有第一〜第六特徵的本發明 自在車寬方向中央部處配置的位置燈燈 光部朝車寬方向兩側（也就是左右）方向 光部配置的透鏡朝前方照射，所以獲得 長的長照射面，而能提升從前方觀察的 本身，是以從外部看不到的方式用光緣 ，從與設置有位置 向朝上升方向延伸 ，是由以上述透鏡 反射鏡，從後方覆 光通過該導光部朝 有上述第一〜第三 上方處，具備有： 是配置在車把外殼 〇 ，其車寬方向端部 方向端部的鉛直線 ，在車體前部，來 泡的光，會通過導 反射，通過沿著導 朝車寬方向左右延 辨識性。而位置燈 外殼覆蓋，所以將 201033064 該光源外殻作在中央而辨識成在車寬方向左右分別具有光 源。也就是說，能夠將位置燈的光源作成單一個，而容易 讓成本降低。 尤其藉由具有第二特徵的本發明，可以配置：相對於 前外殻的車寬方向尺寸較長的導光部。於是，與將導光部 水平配置的情況相比，可以確保更寬廣的照射區域。而藉 由將導光部斜上延伸的特別的V型配置，能夠預期有很好 的辨識性。 藉由具有第四特徵的本發明，藉由使位置燈與頭燈分 離配置，則容易辨識爲：將位置燈從頭燈完全獨立出來的 燈光裝置。 藉由具有第六特徵的本發明，藉由使位置燈朝頭燈更 外側延伸，則能夠更加提升位置燈的辨識性。 【實施方式】 以下參考圖面來說明本發明的一種實施方式。第1圖 是本發明的一種實施方式的包含燈光裝置的機車的正視圖 ，第2圖是同左側視圖。在第1圖、第2圖，跨騎型車輛 也就是機車1，具有車體框架6，該車體框架6是由：頭 管2、從頭管2朝後方延伸的主框架3、從主框架3的後 端部朝車寬方向兩側（也就是左右方向）分別朝斜後上方延 伸的兩支一對的後框架4、以及從主框架3分別橫跨到後 框架4的副框架5所構成。在頭管2，可自由轉動地支承 著轉向軸7，在轉向軸7的下部，設置有：將前輪8可自 -8 - 201033064 由旋轉地支承的前叉9’在轉向軸7的上部結合著車把桿 10° 在車體前部設置有：將車把桿1〇覆蓋的車把外殼n 、將前叉9的上部前方覆蓋的前外殼12、將駕駛者的腳部 的前方覆蓋的腿部護罩13、以及將前輪8的上部覆蓋的前 擋泥板14°在車把外殻安裝有：頭燈15及鄰接於頭燈 15的左右的一對前方向燈16、16、及後照鏡17、17。在 ❹ 前外殼12的前部設置有位置燈18。位置燈18，具備有： 設置於中央的光源（位置燈燈泡）、與設置在該光源前方而 朝車寬方向左右延伸的透鏡。包含有光源與透鏡的位置燈 1 8的詳細情形後面會敘述。 從車體前後方向中央部到後部，設置有：從上方覆蓋 主框架3與引擎31的中央外殼19、與將車體後部覆蓋的 後外殻20，且在較後外殻20更後部處設置有：從上方覆 蓋後輪21的後擋泥板22。在中央外殼19及後外殼20上 φ 設置有座墊23，在座墊23的下方與後框架4之間設置有 :能用來收容安全帽或小東西等的收納盒24及油箱25。 在後框架4，設置有：讓共乘者抓手用的扶手桿26, 在後擋泥板22安裝有：複合燈27與牌照28。 在主框架3的大致中央部，所接合的懸架板29朝下 方延伸，而在後端部所接合著的樞支板30朝下方延伸。 懸架板29用來懸架引擎31。樞支板30，是可上下自由擺 動地支承搖臂32的其中一端的樞支軸（沒有圖示）及側腳架 33的支承部。在搖臂32的另一端軸支承著後輪21，且搖 -9 - 201033064 臂32的另一端藉由後懸吊裝置34所懸吊，而該後懸吊裝 置34其上端支承於後框架4。引擎31的動力，是藉由傳 動裝置而傳動到後輪21，該傳動裝置是由：離合器、變速 機、減速機、及鏈條等（沒有圖示）所構成。動力傳達用的 鏈條是藉由鏈條外殼35所覆蓋。在車體的右側安裝有： 將引擎31的排氣朝後方排出的滅音器36。 第3圖是機車1的前外殼及其週邊的放大圖。在第3 圖，前外殻12是由：以仿照上凸起型的上緣121與仿照 _ 大致V字型的下緣122與左右兩肩123來限定形狀的上部 分124、以仿照下凸的大致U字型的上緣125與大致水平 地延伸的下緣126與左右的兩緣127來限定形狀的中央部 分128、以及從中央部分128分別朝左右延長的下部分 129' 129所構成。下部分129、129是分別接合於上述腿 部護罩13、13。 在具有上述各部分的前外殼12，設置有位置燈18。 位置燈1 8 ’從車寬方向中央部朝外側（也就是左右）朝上延 φ 伸，從車體前方觀察形成爲V字型。位置燈18的左右兩 端是分別連結於前外殼12的中央部分128的上緣125。以 該方式左右延長的位置燈1 8，詳細情形如後述，具有位於 車寬方向中央部的光源37，具有：將從該光源37發出的 光導引至位置燈18的左右端的導光構造。 光源3 7也就是位置燈1 8的中央部，是以光源外殻3 8 覆蓋。光源外殼38是由：以前外殻12的上部分124所支 承的上部分381'以及以前外殼12的中央部分128所支承 -10- 201033064 的下部分382所構成。光源外殼38的下部分382的緣部 ，僅覆蓋位置燈1 8的光源3 7附近，位置燈1 8的左右延 長部，以可從前方觀察的方式’形成爲：隨著朝向下方左 右寬度越減少的下凸的V字型。 來說明位置燈18的構造。第4圖是顯示位置燈的構 造的俯視圖，第5圖是正視圖，第6圖是立體圖，第7圖 是取下透鏡的狀態的位置燈（也就是反射鏡側）的立體圖。 ❿ 如從這些圖面所理解，位置燈18，是由：光源37、反射 鏡39、與透鏡40所構成。光源37，例如是1〇瓦特的白 熱燈泡。反射鏡39，是由樹脂材料所構成，在內面具有蒸 鍍有鋁的反射面，是由：設置在中央的筒狀的燈泡收容部 4 1、以及從燈泡收容部41分別朝車寬方向左右延伸的反 射鏡延長部42所構成。在燈泡收容部41的底部分（靠近 車輛後方的壁部）411，安裝有：將光源37支承於反射鏡 39的燈泡插座50。 透鏡40，是以透明的樹脂形成，具有對應於反射鏡 39的燈泡收容部41的前面的外型，具備有：處理爲非透 明而讓光源37從前方不能透過的中央部401 (參考第4圖） 、以及從該中央部401朝與反射鏡延長部42相同方向延 伸，覆蓋反射鏡延長部42的前面，用來使從反射鏡延長 部42朝前方反射的光（參考在第4圖、第5圖以圖號45 顯示的線）穿透的作爲透明部的透鏡延長部43。而透鏡40 的中央部也與透鏡延長部43同樣地，作爲透明部也可以 ’而在該情況，光源外殻38的背面是藉由鋁蒸鍍等方式 -11 - 201033064 作成非透明而讓光源37無法從前方穿透。 如從第4圖〜第6圖所示的透鏡40的形狀來了解， 透鏡延長部43，具有：上壁431、前壁432及下壁433、 與後方的開放部。另一方面，如從第4圖〜第7圖所示的 反射鏡的形狀所理解，反射鏡延長部42，具有··上壁421 、後壁42 2'及下壁42 3與前方的開放部。 反射鏡延長部42的開放部與透鏡延長部43的開放部 ，互相相對向形成空洞部。該空洞部構成了：將從光源37 發出，如在第5圖以箭頭45所示，以反射鏡39的燈泡收 容部41的壁面反射的光朝車寬方向左右導引的導光部。 而空洞部（導光部）的剖面形狀則參考第8圖在後面敘述。 如第4圖所示，爲了使從光源3 7發出的光反射到反 射鏡延長部42的內面，所以形成了 ：剖面形狀爲階段狀 的反射面424。從光源37發出的光45，藉由非透明的中 央部401朝後方及朝側方反射，一邊以後壁422的反射面 424朝前方反射，一邊將其從位置燈1 8的中心部導引至涵 蓋車寬方向外側（也就是左右）端部的範圍。 透鏡延長部43的前壁43 2的內面，也可以花紋加工 或滾花加工作成凹凸形狀（在第5圖以縱方向的複數的點 線顯示）。藉由利用該花紋加工或滾花加工所作成的凹凸 形狀的間距’使通過透鏡4 0所看到的光的樣子變化。而 將透鏡40安裝於反射鏡39的構造可以採取習知的構造， 例如如第4圖、第5圖所示，在透鏡40的兩端設置螺栓 固定用的突出部44，可以採取以通過該突出部44的螺栓 -12- 201033064 來固定於反射鏡39的構造。反射鏡39是安裝於前外殼12 的上緣125、或可以一體成形於前外殻12的上緣125。 第8圖是第3圖的A-A線的剖面圖，第9圖是第3圖 的B-B線的剖面圖，與第1圖〜第7圖相同的圖號表示相 同或同等部分。如第8圖、第9圖所示，位置燈18，具有 :以反射鏡39與透鏡40所圍繞的作爲導光部的空洞部46 。光源外殻38位於位置燈18的上方，前外殼12的中央 φ 部分128位於下方。而在第8圖、第9圖，雖然舉例是以 不同構件形成：前外殼12的中央部分I28的下緣126、中 央部分128的上緣125，而如關於第3圖所述，上緣（上緣 構件）125與下緣126作成一體，構成前外殼12的中央部 分1 2 8也可以。 藉由上述構造，從單一光源37發出的光，被導引到 :以反射鏡39與透鏡40所形成的作爲導光部的空洞部46 ，而可以使從位置燈18的中央部到左右兩端部發光。而 Φ 如第1圖、第3圖所說明，位置燈18的中央部以光源外 殼38所覆蓋，所以當從前方觀察時，會隱藏光源37,僅 通過透鏡延長部43來照射光。於是，位置燈1 8能被辨識 爲左右分開的兩個一對的燈。 位置燈18，由於具有從車寬方向中央附近朝車寬方向 左右直線延伸的特徵的形狀，所以能發揮高辨識性。藉由 從設置於車把外殼1 1的頭燈1 5起，在下方隔著間隔配置 位置燈1 8的構造，則能容易地從外部辨識位置燈1 8爲與 頭燈15或方向燈16、16不同的構造。 -13- 201033064 位置燈1 8的透鏡40的車寬方向最外側端部，形成爲 位於較頭燈1 5的兩側端更外側處也可以。也就是說，如 第1圖所示，從通過頭燈15的兩側端的鉛直線51，直到 伸出到車寬方向外側的位置，使透鏡延長部43延長。 第10圖是上述實施方式的第二實施方式的位置燈及 其週邊部的立體圖。在該變形例，是以將前外殼12的中 央部分128的上緣125從前外殼12分離的構件形成。第 10圖的上緣125，與反射鏡39形成爲一體，將透鏡40接 合於該反射鏡39»在上緣125形成有四處托架47，該托 架47用來將該上緣125安裝於前外殼12的中央部分128 ，在各托架47設置有讓螺栓可通過的孔。 收容光源37的燈泡收容部41，不是關於第1圖〜第 9圖所說明的圓筒狀，是具有以底面48與左右壁面49與 沒有圖示的上部壁面所限定的形狀，從前方觀察爲V字型 形狀。將燈泡收容部41的前面覆蓋的透鏡中央部401，形 成於與該V字型燈泡收容部41適合的V字型。光源外殼 38雖然覆蓋該透鏡中央部401，而在第10圖，下方爲了 圖示透鏡中央部401而切斷顯示。 在該第二實施方式，與第一實施方式同樣地，從光源 37發出的光，是在以反射鏡39與透鏡延長部43所形成的 空洞部46內反射，穿透過透鏡40的透鏡延長部43而朝 車體前方放出。 在本說明書，雖然依照實施方式來說明本發明，而本 發明並不限於該實施方式。該業者，能在請求項記載的範 -14- 201033064 圍’是用習知技術等來實施本發明。例如，要將前外殼12 、光源外殼38的外型作成何種形狀、或是以何種結合方 法將位置燈1 8組裝到前外殼1 2都能自由設計。 具有：從配置於前外殼12的車寬方向中央的光源37 朝左右直線且細長地延長的透鏡40，且具有反射鏡39， 該反射鏡39所包含的反射面形成爲：讓來自光源37的光 從該透鏡40的中央部反射至端部，並且設置有外殼（光源 φ 外殼），僅將透鏡40的中央部分隱藏爲從前方無法辨識光 源37 〇 【圖式簡單說明】 第1圖是本發明的一種實施方式的具備有燈光裝置的 機車的正視圖。 第2圖是本發明的一種實施方式的具備有燈光裝置的 機車的左側視圖。 φ 第3圖是顯示前外殼及其週邊構造的機車的位置燈的 主要部分放大圖。 第4圖是本發明的一種實施方式的位置燈的俯視圖。 第5圖是本發明的一種實施方式的位置燈的正視圖。 第6圖是本發明的一種實施方式的位置燈的立體圖。 第7圖是取下透鏡後的狀態的位置燈（也就是反射鏡 側）的立體圖。 第8圖是第3圖的A-A線的剖面圖。 第9圖是第3圖的B-B線的剖面圖。 -15- 201033064 第ίο圖是本發明的第二實施方式的位置燈及其週邊 部的立體圖。 【主要元件符號說明】 1 :機車 1 1 :車把外殼 12 :前外殼 1 5 :頭燈 1 6 :方向燈 1 8 :位置燈 37 :光源（位置燈燈泡） 38 :光源外殼 3 9 :反射鏡 40 :透鏡 41 :燈泡收容部 42 :反射鏡延長部 43 :透鏡延長部 46 :空洞部（導光部）201033064 VI. Description of the Invention: [Technical Field] The present invention relates to a position lamp and a lighting device for a locomotive, and more particularly to a position lamp and a lighting device for enhancing an identifiable locomotive viewed from the front of the vehicle body. [Prior Art] _ In addition to the headlights or direction lights, the locomotive has position lights. In the headlight device disclosed in Patent Document 1, a headlight, a directional light, and a position lamp are collectively arranged. In the headlight device, a light shielding wall is provided in front of the headlight bulb, and a lens is disposed on the left and right sides of the light shielding wall so that the light emitted from the headlight is irradiated to the front only by the left and right lenses. Patent Document 1 exemplifies the effect of using the single light source (headlight bulb) to recognize that it has a plurality of light sources. This conventional headlight device has a structure in which a lamp is disposed adjacent to the left and right positions of the headlight portion, and a directional lamp is disposed on both sides thereof. [PRIOR ART DOCUMENT] [Patent Document 1] [Patent Document 1] JP-A-2008-9 1 1 78 SUMMARY OF THE INVENTION [Problems to be Solved by the Invention] The device proposed by Patent Document 1 is more Turning on a luminaire set -5 - 201033064 Configuration 'The advantage is that it can be done at one time: the assembly of the headlights assembled in other steps into the car body. The headlight described in Patent Document 1 is a method in which two lamps can be regarded by using the design effect of the headlights of the original one. That is to say, there is no reduction in the number of light sources for a headlight of one lamp mode. The other side has a position lamp functioning as a vehicle width lamp, and it is necessary to arrange two lamps at least in the left and right directions of the vehicle width. The arrangement of such a position lamp is also shown in Patent Document 1. That is, in conventional devices, the position light bulb still requires two, and is required to reduce the number of position light bulbs. However, the conventional position lamp only emits light from the position light bulb and the mirror portion in the vicinity thereof, and requires a larger illumination range in a simple configuration. Therefore, it is desirable to improve the visibility of the position lamp and to reduce the cost by essentially making a single light source of a plurality of position lamps. An object of the present invention is to provide a position lamp and a lighting device including the position lamp, which can improve the visibility and reduce the number of light sources. [The means for solving the problem] The present invention for achieving the above object is In the first position of the locomotive, the first lamp is provided with a position light bulb disposed at a center portion of the vehicle width direction on the front outer casing provided in the front portion of the vehicle body, and is attached to the front outer casing 'from the front of the vehicle body a light source casing covering the position lamp bulb, an elongated light guiding portion that guides light emitted from the position lamp bulb toward both sides in the vehicle width direction, and a light guiding portion disposed along the light guiding portion in front of the light guiding portion透-6- 201033064 Mirror. According to a second aspect of the present invention, in the present invention, the center portion corresponding to the position of the light guide lamp bulb is oriented toward the vehicle width, and the third feature is the light guide portion and the cavity surrounded by the mirror. The lens has a reflecting surface that reflects the Φ vehicle width direction from the position light bulb. According to a fourth aspect of the present invention, there is provided a position lamp having a characteristic, and a headlight disposed in the position lamp is separated from the position lamp. According to a fifth aspect of the present invention, in the headlight, the handlebar outer casing is located above the front outer casing. The sixth feature is that the position light extends to: a vehicle width Φ compared to the headlight passing through the headlight. Closer to the outside of the car width direction. [Effect of the Invention] The lens having the first to sixth features of the present invention is irradiated toward the front by a lens disposed at a position in the center portion of the vehicle width direction toward the light portions on both sides (i.e., left and right) in the vehicle width direction. Therefore, a long long-illuminated surface is obtained, and the self-observing from the front can be raised in such a manner that it is not visible from the outside, and the light edge is extended from the position to the rising direction by the lens mirror. The rear light is applied to the first to third upper portions through the light guiding portion, and is provided with a lead line disposed at the end portion of the handlebar outer casing at the end portion in the vehicle width direction, and is provided at the front portion of the vehicle body. The light of the bubble passes through the guide reflection and is distinguished by extending left and right along the direction of the vehicle. Since the position lamp is covered by the outer casing, the light source casing of 201033064 is centrally recognized and has a light source in the left and right directions of the vehicle width. That is to say, it is possible to make the light source of the position lamp single, and it is easy to reduce the cost. In particular, by the present invention having the second feature, it is possible to arrange a light guiding portion having a long dimension with respect to the front outer casing in the vehicle width direction. Therefore, a wider irradiation area can be ensured than in the case where the light guiding portion is horizontally arranged. A special V-shaped configuration in which the light guiding portion is obliquely extended can be expected to have good visibility. According to the present invention having the fourth feature, by disposing the position lamp and the headlight, it is easily recognized as a lighting device that completely separates the position lamp from the headlight. According to the invention having the sixth feature, by making the position lamp extend toward the outside of the headlight, the visibility of the position lamp can be further improved. [Embodiment] An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a front elevational view of a locomotive including a lighting device according to an embodiment of the present invention, and Fig. 2 is a view from the left side. In the first and second figures, the straddle type vehicle, that is, the locomotive 1, has a vehicle body frame 6, which is composed of a head pipe 2, a main frame 3 extending rearward from the head pipe 2, and a main frame. Two pairs of rear frames 4 extending toward the upper rear side in the vehicle width direction (that is, the left and right direction) toward the rear side and the rear side, respectively, and the sub-frame 5 extending from the main frame 3 to the rear frame 4, respectively. Composition. In the head pipe 2, the steering shaft 7 is rotatably supported, and in the lower portion of the steering shaft 7, a front fork 9' that rotatably supports the front wheel 8 from -8 - 201033064 is coupled to the upper portion of the steering shaft 7 The handlebar 10° is provided at the front of the vehicle body: a handlebar housing n that covers the handlebar 1〇, a front outer casing 12 that covers the upper front side of the front fork 9, and a front of the driver's foot. The leg shield 13 and the front fender 14 that covers the upper portion of the front wheel 8 are attached to the handlebar casing: a headlight 15 and a pair of left and right front directional lights 16, 16 adjacent to the headlight 15, and Rear view mirrors 17, 17. A position light 18 is provided at the front of the front outer casing 12. The position lamp 18 includes a light source (position light bulb) provided at the center, and a lens that is disposed in front of the light source and extends left and right in the vehicle width direction. The details of the position lamp 1 8 including the light source and the lens will be described later. From the central portion to the rear portion of the vehicle body in the front-rear direction, a central casing 19 covering the main frame 3 and the engine 31 from above, a rear casing 20 covering the rear portion of the vehicle body, and a rear portion of the rear casing 20 are provided. There is: a rear fender 22 covering the rear wheel 21 from above. A seat cushion 23 is provided on the center casing 19 and the rear casing 20, and a storage box 24 and a tank 25 for accommodating a helmet or a small thing are provided between the seat cushion 23 and the rear frame 4. In the rear frame 4, there is provided a handrail lever 26 for the rider to grip the hand, and a composite lamp 27 and a license plate 28 are attached to the rear fender 22. At a substantially central portion of the main frame 3, the joined suspension plate 29 extends downward, and the pivotal plate 30 joined at the rear end portion extends downward. Suspension plate 29 is used to suspend engine 31. The pivotal plate 30 is a pivotal shaft (not shown) that supports one end of the rocker arm 32 so as to be swingable up and down, and a support portion of the side stand 33. The rear wheel 21 is axially supported at the other end of the rocker arm 32, and the other end of the arm -9 - 201033064 is suspended by the rear suspension device 34, and the rear end of the rear suspension device 34 is supported by the rear frame 4 . The power of the engine 31 is transmitted to the rear wheel 21 by means of a transmission device composed of a clutch, a speed changer, a speed reducer, a chain, and the like (not shown). The chain for power transmission is covered by the chain housing 35. On the right side of the vehicle body, a silencer 36 that discharges the exhaust of the engine 31 toward the rear is attached. Fig. 3 is an enlarged view of the front outer casing of the locomotive 1 and its periphery. In Fig. 3, the front outer casing 12 is defined by the upper portion 121 of the upper convex type and the lower edge 122 and the left and right shoulders 123 of the substantially V-shaped shape to define the upper portion 124. The substantially U-shaped upper edge 125 and the substantially horizontally extending lower edge 126 and the left and right edges 127 define a central portion 128 that is shaped and a lower portion 129' 129 that extends from the central portion 128 to the left and right, respectively. The lower portions 129, 129 are joined to the leg shields 13, 13 described above, respectively. A position lamp 18 is provided in the front outer casing 12 having the above-described respective portions. The position lamp 1 8 ' extends upward from the center portion in the vehicle width direction toward the outside (that is, left and right), and is formed in a V shape as viewed from the front of the vehicle body. The left and right ends of the position lamp 18 are respectively coupled to the upper edge 125 of the central portion 128 of the front outer casing 12. The position lamp 1 which is extended left and right in this manner, as will be described later, has a light source 37 located at the center portion in the vehicle width direction, and has a light guiding structure for guiding the light emitted from the light source 37 to the left and right ends of the position lamp 18. The light source 3 7 is also the central portion of the position lamp 18 and is covered by the light source housing 38. The light source housing 38 is constructed by an upper portion 381' supported by the upper portion 124 of the previous housing 12 and a lower portion 382 supported by the central portion 128 of the previous housing 12 -10-201033064. The edge of the lower portion 382 of the light source housing 38 covers only the vicinity of the light source 37 of the position lamp 18, and the left and right extensions of the position lamp 18 are formed in a manner viewable from the front as follows: Reduced convex V-shape. The configuration of the position lamp 18 will be explained. Fig. 4 is a plan view showing the configuration of the position lamp, Fig. 5 is a front view, Fig. 6 is a perspective view, and Fig. 7 is a perspective view of the position lamp (i.e., the mirror side) in a state where the lens is removed. As understood from these drawings, the position lamp 18 is composed of a light source 37, a mirror 39, and a lens 40. The light source 37 is, for example, a 1 watt white heat bulb. The reflecting mirror 39 is made of a resin material and has a reflecting surface on which aluminum is vapor-deposited on the inner surface, and is provided in a cylindrical bulb accommodating portion 41 provided at the center and in the vehicle width direction from the bulb accommodating portion 41. The mirror extension portion 42 extends left and right. A bulb socket 50 for supporting the light source 37 to the mirror 39 is attached to the bottom portion (the wall portion near the rear of the vehicle) 411 of the bulb housing portion 41. The lens 40 is formed of a transparent resin and has an outer shape corresponding to the front surface of the bulb accommodating portion 41 of the mirror 39. The lens 40 is provided with a central portion 401 that is opaque and prevents the light source 37 from being transmitted from the front (refer to the fourth And extending from the central portion 401 in the same direction as the mirror extension portion 42 to cover the front surface of the mirror extension portion 42 for reflecting light forward from the mirror extension portion 42 (refer to Fig. 4, Fig. 5 is a lens extension portion 43 as a transparent portion penetrated by a line shown by Fig. 45. Similarly, the central portion of the lens 40 may be a transparent portion as in the case of the lens extension portion 43. In this case, the back surface of the light source housing 38 is made opaque by means of aluminum vapor deposition or the like -11 - 201033064 to make the light source 37 can't penetrate from the front. As is apparent from the shapes of the lenses 40 shown in FIGS. 4 to 6 , the lens extension portion 43 has an upper wall 431 , a front wall 432 and a lower wall 433 , and an open portion at the rear. On the other hand, as understood from the shapes of the mirrors shown in FIGS. 4 to 7, the mirror extension portion 42 has the upper wall 421, the rear wall 42 2', and the lower wall 42 3 open to the front. unit. The open portion of the mirror extension portion 42 and the open portion of the lens extension portion 43 face each other to form a cavity portion. The cavity portion is a light guiding portion that is emitted from the light source 37 and that is guided by the wall surface of the bulb housing portion 41 of the mirror 39 to the left and right in the vehicle width direction as indicated by an arrow 45 in Fig. 5. The cross-sectional shape of the cavity portion (light guiding portion) will be described later with reference to Fig. 8. As shown in Fig. 4, in order to reflect the light emitted from the light source 37 to the inner surface of the mirror extension portion 42, a reflection surface 424 having a stepped shape is formed. The light 45 emitted from the light source 37 is reflected rearward and laterally by the opaque central portion 401, and is reflected from the center portion of the position lamp 18 while the reflecting surface 424 of the rear wall 422 is reflected forward. Covers the range of the outer (ie, left and right) ends of the vehicle width direction. The inner surface of the front wall 43 2 of the lens extension portion 43 may be patterned or knurled to work as a concavo-convex shape (indicated by a plurality of dotted lines in the longitudinal direction in Fig. 5). The pattern seen by the lens 40 is changed by the pitch of the uneven shape formed by the patterning or knurling. The structure in which the lens 40 is attached to the mirror 39 can adopt a conventional configuration. For example, as shown in FIGS. 4 and 5, a protruding portion 44 for fixing a bolt is provided at both ends of the lens 40, and can be adopted to pass the The bolts -12-201033064 of the projections 44 are fixed to the configuration of the mirror 39. The mirror 39 is attached to the upper edge 125 of the front outer casing 12 or may be integrally formed to the upper edge 125 of the front outer casing 12. Fig. 8 is a cross-sectional view taken along line A-A of Fig. 3, and Fig. 9 is a cross-sectional view taken along line B-B of Fig. 3, and the same reference numerals as those of Figs. 1 to 7 denote the same or equivalent parts. As shown in Figs. 8 and 9, the position lamp 18 has a hollow portion 46 as a light guiding portion surrounded by the mirror 39 and the lens 40. The light source housing 38 is located above the position light 18, and the central φ portion 128 of the front housing 12 is located below. 8 and 9, although the example is formed by different members: the lower edge 126 of the central portion I28 of the front outer casing 12, the upper edge 125 of the central portion 128, and as described in relation to Fig. 3, the upper edge (as described in Fig. 3) The upper edge member 125 is integrally formed with the lower edge 126, and may constitute the central portion 1 2 8 of the front outer casing 12. With the above configuration, the light emitted from the single light source 37 is guided to the hollow portion 46 as the light guiding portion formed by the mirror 39 and the lens 40, and can be made from the central portion of the position lamp 18 to the left and right. The end is illuminated. Further, as described in Figs. 1 and 3, the central portion of the position lamp 18 is covered by the light source casing 38. Therefore, when viewed from the front, the light source 37 is hidden and the light is irradiated only by the lens extension portion 43. Thus, the position lamp 18 can be recognized as two pairs of lamps separated left and right. Since the position lamp 18 has a feature of linearly extending from the vicinity of the center in the vehicle width direction to the right and left in the vehicle width direction, it is possible to exhibit high visibility. By arranging the position lamp 18 from the headlights 15 provided on the handlebar housing 1 1 at intervals, the position lamp 18 can be easily recognized from the outside as the headlight 15 or the directional light 16 , 16 different structures. -13- 201033064 The outermost end portion of the lens 40 of the position lamp 18 in the vehicle width direction may be formed to be located further outward than the both side ends of the headlights 15. That is, as shown in Fig. 1, the lens extension portion 43 is extended from the lead straight line 51 passing through both side ends of the headlight 15 to the position extending outward in the vehicle width direction. Fig. 10 is a perspective view of a position lamp and a peripheral portion thereof according to a second embodiment of the above embodiment. In this modification, a member that separates the upper edge 125 of the central portion 128 of the front outer casing 12 from the front outer casing 12 is formed. The upper edge 125 of Fig. 10 is formed integrally with the mirror 39, and the lens 40 is joined to the mirror 39». The upper edge 125 is formed with four brackets 47 for mounting the upper edge 125 to The central portion 128 of the front outer casing 12 is provided with a hole through which each bolt 47 can pass. The bulb accommodating portion 41 accommodating the light source 37 is not limited to the cylindrical shape described in the first to ninth drawings, and has a shape defined by the bottom surface 48 and the left and right wall surfaces 49 and an upper wall surface (not shown), as viewed from the front. V shape. The lens center portion 401 which covers the front surface of the bulb housing portion 41 is formed in a V shape suitable for the V-shaped bulb housing portion 41. The light source case 38 covers the lens center portion 401, and in Fig. 10, the display is cut off in order to show the lens center portion 401. In the second embodiment, as in the first embodiment, the light emitted from the light source 37 is reflected in the cavity portion 46 formed by the mirror 39 and the lens extension portion 43 and penetrates the lens extension portion of the lens 40. 43 and released to the front of the car body. In the present specification, the present invention has been described in terms of embodiments, and the present invention is not limited to the embodiments. The present invention can be implemented by a conventional technique or the like in the context of the specification of the present invention. For example, the shape of the front outer casing 12, the light source outer casing 38, or the combination of the positional lamp 18 to the front outer casing 12 can be freely designed. The lens 40 has a lens 40 that is linearly elongated from the light source 37 disposed at the center of the front outer casing 12 in the vehicle width direction, and has a reflecting mirror 39. The reflecting surface included in the reflecting mirror 39 is formed such that the light source 37 is provided. Light is reflected from the central portion of the lens 40 to the end portion, and is provided with a casing (light source φ casing), and only the central portion of the lens 40 is concealed from the front side from which the light source 37 cannot be recognized. [Illustration of the drawing] FIG. 1 is A front view of a locomotive equipped with a lighting device according to an embodiment of the invention. Fig. 2 is a left side view of a locomotive equipped with a lighting device according to an embodiment of the present invention. φ Fig. 3 is an enlarged view of the main part of the position lamp of the locomotive showing the front outer casing and its peripheral structure. Fig. 4 is a plan view of a position lamp according to an embodiment of the present invention. Fig. 5 is a front elevational view of a position lamp according to an embodiment of the present invention. Fig. 6 is a perspective view of a position lamp according to an embodiment of the present invention. Fig. 7 is a perspective view of the position lamp (i.e., the mirror side) in a state in which the lens is removed. Fig. 8 is a cross-sectional view taken along line A-A of Fig. 3. Fig. 9 is a cross-sectional view taken along line B-B of Fig. 3. -15- 201033064 Fig. ui is a perspective view of a position lamp and its peripheral portion according to a second embodiment of the present invention. [Main component symbol description] 1 : Locomotive 1 1 : Handlebar housing 12 : Front housing 1 5 : Headlight 1 6 : Directional lamp 1 8 : Position lamp 37 : Light source (position lamp bulb) 38 : Light source housing 3 9 : Reflection Mirror 40: lens 41: bulb accommodating portion 42: mirror extension portion 43: lens extension portion 46: cavity portion (light guiding portion)