201247451 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種車用頭燈，尤指一種具有防散光構 造的車用頭燈。 【先前技術】 目前多數的汽車頭燈仍是採用高強度氣體放電燈（Hm) 作為光源，與鹵素燈相較，相同瓦數的高強度氣體放電燈 可以產生更大的亮度。但由於半導體技術的發達，更省電 、壽命更長的發光二極體也開始被運用在汽車頭燈照明系 統，由於頭燈照明需要更高的亮度需求，因此必須開發大 功率的發光二極體’並透過二次光學設計，以實現汽車頭 燈對於發光二極體的運用，所謂二次光學設計的第一次光 學設計是在發光二極體封裝時進行，以決定發光二極體的 出光角度、光強、光通量大小、光強分佈、色溫的範圍與 分佈；至於二次光學設計，一般大功率發光二極體都有一 久透鏡，其發光角度為120度左右，而二次光學設計是將 經過一次透鏡後的光再通過一個光學透鏡以改變其光學性 能。 與一般照明器材不同的是：汽車頭燈除了考慮照明效 率以外’更需要符合交通法規，亦即汽車頭燈發亮時產生 的光型有一定的規範和限制’舉例來說，汽車行駛過程與 對向來車會車的情況十分頻繁，在夜間行車時勢必要打開 頭燈，此時頭燈的投射角度即被要求不能對來車產生眩光 ，以確保行車安全。該等具有特殊規範的光型，即必須透 201247451 過前述的光學設計來達成·，再者，由於發光二極體的出光 角度大，產生散光現象的機率相對較高，況發光二極體封 裝後’並不像裸晶片的出光明確，經由膠封裝後的發光二 極髋，出光時因為有膠的封裝，因此就有光的折射產生， 此時即容易產生控制不易的狀況，針對上述狀況必須提出 可行的因應及解決方案。 【發明内容】 因此本發明主要目的在提供一種具有防散光構造的車 用頭燈。 為達成前述目的採取的主要技術手段係令前述車用頭 燈主要係於一燈殼内設有一主燈組件，該主燈組件包括： 一燈杯，具有一前端及一後端，其前端形成一内凹的 反射壁’反射壁的底端形成有一通孔，該通孔並貫穿燈杯 後端；該反射壁具有一上反射面與一下反射面； 一燈板’係設於燈杯的後端，該燈板上設有一個以上 的發光二極體，並朝向燈杯的通孔； 一透鏡，係設於燈杯前端，且相對於燈杯内的反射壁 及燈板上的發光二極體； 一散光遮板’係設於前述燈杯内，且位於燈杯上的通 孔與下反射面之間； 前述燈板上的發光二極體、燈杯上的反射壁及透鏡係 位於同一光轴（light axial)，亦即發光二極體的光線除直接 通過透鏡外，亦經由燈杯上的反射壁反射後通過透鏡射出 ’而散光遮板係位於發光二極體與反射壁的下反射面之間 4 201247451 ，亦即散光遮板遮蔽了發光二極體的光線在下反射面上的 反射，藉以可以產生避免影響對方來車視線且符合法規的 光型，且可改善散光問題。 【實施方式】 關於本發明的一較佳實施例，首先請參閱圖彳、圖2 所示，主要係於一燈殼1〇内設有一個主燈組件2〇;其中 « 該燈殼10主要係由一前罩彳彳 '一透明或透光的燈罩 板1 2及一後罩1 3組成，於本實施例中，該後罩13係由 導熱材料構成，其具有一前端及一後端，其前端具有一開 口，又前端的各角落處分別形成有一固定孔131，供與前 述的前罩11相互結合；又後罩13的後端向外形成有複數 鰭片1 32，以增加散熱面積，加強散熱效果；於本實施例 中，該前罩11係呈矩形框狀，其相對結合於後罩]3的前 端處，又燈罩板12係位於後罩13前端和前罩11之間。 請參閱圖3所示，該主燈組件2〇主要係由一燈杯21 、一燈板22、一透鏡23、一個以上的散光遮板24及一背 板25所組成；其中： 於本實施例中，該燈杯21係呈矩形狀，其具有一前 端及一後端’其前端形成一内凹的反射壁211，反射壁 211的底端形成有一通孔212，該通孔212並貫穿燈杯21 後端；該反射壁211係略呈碗狀内凹形成於燈杯21前端 ，其具有一上反射面211A與一下反射面211B及兩側反 射面211C(請配合參閱圖4所示），於本實施例中，該反射 201247451 壁211係在燈杯21上形成有金屬鍍層所構成，採用的金 屬可為鋁（AI)，燈杯21本身係由聚碳酸酯（PC)或聚曱基丙 烯酸曱酯（PMMA,亦稱壓克力）所構成。 仍請參閱圖3所示，燈杯21前端接近兩側邊處分別 形成有一定位柱213及一固定孔214,供固定透鏡23之 用’於本實施例中，該透鏡23係一凸透鏡，其凸側朝向 燈杯21的反射壁211，又透鏡23兩端分別向外延伸形成 一固定部230 ’兩固定部230上分別形成有一定位孔231 及一固定孔232，其分別對應於燈杯21上的定位柱213 及固定孔214，其中定柱孔231與定位柱213相互插楔構 成定位，固定孔232,214則可螺設螺絲以相互固定。 該燈板2 2係設於燈杯21的後端，於本實施例_，該 燈板22係於一電路板上設有一個以上的發光二極體22〇， 該電路板上並形成有複數的楔孔221，供固定散光遮板24 之用，而燈板22上的發光二極體220係朝向燈杯21的通 孔212,並與燈杯21的反射壁211、透鏡23位於同一光 軸上。201247451 VI. Description of the Invention: [Technical Field] The present invention relates to a headlight for a vehicle, and more particularly to a headlight for a vehicle having an anti-astigmatism structure. [Prior Art] At present, most of the automobile headlights still use a high-intensity discharge lamp (Hm) as a light source, and a high-intensity gas discharge lamp of the same wattage can generate greater brightness than a halogen lamp. However, due to the development of semiconductor technology, light-emitting diodes with longer power consumption and longer life have also been used in automotive headlight lighting systems. Since headlamp lighting requires higher brightness requirements, it is necessary to develop high-power LEDs. The body's use of secondary optics to achieve the use of automotive headlamps for light-emitting diodes. The first optical design of the so-called secondary optical design is carried out in the case of a light-emitting diode package to determine the light-emitting diode. Light exit angle, light intensity, luminous flux size, light intensity distribution, color temperature range and distribution; as for secondary optical design, generally high-power light-emitting diodes have a long-lasting lens, the illumination angle is about 120 degrees, and the secondary optical design It is the light that passes through the lens and then passes through an optical lens to change its optical performance. Different from general lighting equipment: in addition to considering lighting efficiency, automotive headlights need to comply with traffic regulations, that is, the light patterns generated when the headlights are illuminated have certain specifications and restrictions. For example, the driving process of automobiles It is very frequent for the car to arrive in the car. It is necessary to turn on the headlight when driving at night. At this time, the projection angle of the headlight is required to be unable to glare the car to ensure safe driving. These light patterns with special specifications must be achieved through the above-mentioned optical design of 201247451. Moreover, due to the large light-emitting angle of the light-emitting diode, the probability of astigmatism is relatively high, and the light-emitting diode package is relatively high. After that, it is not as clear as the bare wafer, and the light-emitting diodes are sealed by the glue. Because of the glue package, there is light refraction. At this time, it is easy to control the situation. Possible solutions and solutions must be proposed. SUMMARY OF THE INVENTION It is therefore a primary object of the present invention to provide a vehicular headlamp having an anti-scattering configuration. The main technical means for achieving the above-mentioned purposes is that the vehicle headlights are mainly provided with a main lamp assembly in a lamp housing. The main lamp assembly comprises: a lamp cup having a front end and a rear end, the front end of which is formed a concave reflecting wall of the reflecting wall is formed with a through hole at a bottom end thereof, and the through hole penetrates through a rear end of the lamp cup; the reflective wall has an upper reflecting surface and a lower reflecting surface; and a light board is disposed on the lamp cup a rear end, the light board is provided with more than one light emitting diode and facing the through hole of the light cup; a lens is disposed at the front end of the light cup, and is opposite to the reflective wall in the light cup and the light on the light board a astigmatism shutter is disposed in the light cup and is located between the through hole and the lower reflecting surface of the lamp cup; the light emitting diode on the light board, the reflective wall on the lamp cup and the lens The light is in the same light axis, that is, the light of the light-emitting diode is directly reflected by the reflective wall on the lamp cup and then emitted through the lens, and the astigmatism is located in the light-emitting diode and the reflection. Between the lower reflecting surfaces of the wall 4 201247451 The shutter shielding the light emitting diode is reflected by the reflecting surface of the lower, it can be produced thereby to avoid the influence to the other car sight and in accordance with regulations of the light type, and may improve the astigmatism problem. [Embodiment] Referring to a preferred embodiment of the present invention, first, as shown in FIG. 2 and FIG. 2, a main lamp assembly 2 is disposed in a lamp housing 1〇; wherein «the lamp housing 10 is mainly The utility model is composed of a front cover 一 a transparent or transparent lamp cover plate 12 and a rear cover 13 . In the embodiment, the rear cover 13 is made of a heat conductive material, and has a front end and a rear end. The front end has an opening, and a fixing hole 131 is formed at each corner of the front end for coupling with the front cover 11; and a plurality of fins 1 32 are formed outwardly at the rear end of the rear cover 13 to increase heat dissipation. In the present embodiment, the front cover 11 has a rectangular frame shape, which is oppositely coupled to the front end of the rear cover 3, and the lamp cover 12 is located between the front end of the rear cover 13 and the front cover 11. . Referring to FIG. 3, the main lamp assembly 2 is mainly composed of a light cup 21, a light board 22, a lens 23, one or more astigmatism shutters 24 and a back sheet 25; wherein: In the example, the lamp cup 21 has a rectangular shape, and has a front end and a rear end. The front end thereof has a concave reflective wall 211. The bottom end of the reflective wall 211 is formed with a through hole 212. a rear end of the lamp cup 21; the reflective wall 211 is formed in a concave shape on the front end of the lamp cup 21, and has an upper reflecting surface 211A and a lower reflecting surface 211B and two side reflecting surfaces 211C (please refer to FIG. 4 In the present embodiment, the reflection 201247451 wall 211 is formed by forming a metal plating on the lamp cup 21, and the metal used may be aluminum (AI), and the lamp cup 21 itself is made of polycarbonate (PC) or poly. It is composed of decyl methacrylate (PMMA, also known as acrylic). Referring to FIG. 3, a front end of the lamp cup 21 is formed with a positioning post 213 and a fixing hole 214 for fixing the lens 23. In the embodiment, the lens 23 is a convex lens. The convex side faces the reflective wall 211 of the lamp cup 21, and the two ends of the lens 23 extend outwardly to form a fixing portion 230. The fixing portion 230 defines a positioning hole 231 and a fixing hole 232 respectively corresponding to the lamp cup 21, respectively. The positioning post 213 and the fixing hole 214, wherein the fixing hole 231 and the positioning post 213 are wedged to form a positioning, and the fixing holes 232, 214 can be screwed to fix each other. The light board 22 is disposed at the rear end of the light cup 21. In the embodiment, the light board 22 is provided on one circuit board with one or more light emitting diodes 22, and the circuit board is formed with The plurality of wedge holes 221 are used for fixing the astigmatism shutter 24, and the light-emitting diode 220 on the lamp board 22 faces the through hole 212 of the lamp cup 21, and is located in the same manner as the reflective wall 211 and the lens 23 of the lamp cup 21. On the optical axis.
該散光遮板24係位於前述燈杯21内，且位於燈杯 21的通孔212與反射壁211的下反射面211B之間；於本 實施例中，該散光遮板24係呈弦月形，其具有一弧形底 端及一水平頂端，其弧形底端係與通孔212的下孔緣匹配 ，亦即散光遮板24填實了部分的通孔212(請配合圖4、 圖5所示）’且填實的部位係位於發光二極體220的光線 通過通孔212而到達下反射面211B的光路徑上，亦即散 光遮板24限制了發光二極體220的光線從下反射面211 B 201247451 反射到透鏡23。再者，前述散光遮板24的表面色調係為 深色系’而具有吸收散光的作用。 關於該散光遮板24的固定方式，於本實施例中，該 散光遮板24的背面向外突出地形成有一個以上的楔柱24〇 ，該楔柱240的位置及外徑係與燈板22上的楔孔221匹 配並插楔其間。又本實施例中，該燈板22係固定於背板 25上’再透過背板25固定至燈殼1〇的後罩13内。 由上述說明可瞭解本發明一較佳實施例的具體構造， 由於燈板22上的發光二極體220、燈杯21上的反射壁 211及透鏡23是位於同一光軸上，在未設置散光遮板24 的狀況下，發光二極體220的光線除直接通過透鏡23聚 光外，亦經由燈杯21上的反射壁211反射至透鏡23上； 由於本發明在燈杯21内設置了散光遮板24,而散光遮板 24係位於發光二極體220與反射壁211的下反射面211 B 之間’亦即散光遮板24限制了發光二極體220的光線由 下反射面211B上反射到透鏡23上，在此狀況下，將會使 車燈的光型上端縮減高度，以避免車燈照射時直射對向來 車；又由於該等設計’也可以有效改善車燈的散光問題。 又如圖6所示’係本發明又一較佳實施例的剖視圖， 其基本架構與第一較佳實施例大致相同，不同處在於：該 燈杯21内設有兩片散光遮板24,24,，除原來位於燈杯21 下孔緣處的散光遮板24以外，另一散光遮板24,係位於燈 杯21的上孔緣處’其固定方式與散光遮板24相同，形狀 上適為上下對稱’請參閲圖7所示，該散光遮板24,具有 一匹配通孔212上孔緣的弧形頂端及一水平底端，且適位 201247451The astigmatism shutter 24 is located in the lamp cup 21 and is located between the through hole 212 of the lamp cup 21 and the lower reflecting surface 211B of the reflective wall 211. In the embodiment, the astigmatism shutter 24 is a crescent moon shape. The arcuate bottom end and the horizontal top end are matched with the lower hole edge of the through hole 212, that is, the astigmatism shutter 24 fills a part of the through hole 212 (please cooperate with FIG. 4 and FIG. 5)) and the filled portion is the light path of the light-emitting diode 220 passing through the through hole 212 to the light reflecting path of the lower reflecting surface 211B, that is, the astigmatism shutter 24 limits the light of the light-emitting diode 220 from The lower reflecting surface 211 B 201247451 is reflected to the lens 23. Further, the surface hues of the astigmatism shutter 24 are dark-colored and have an effect of absorbing astigmatism. With respect to the fixing manner of the astigmatism shutter 24, in the embodiment, the back surface of the astigmatism shutter 24 is outwardly protruded to form one or more wedge pillars 24, and the position and the outer diameter of the wedge pillars 240 are combined with the light panel. The wedge holes 221 on the 22 are matched and wedged therebetween. In this embodiment, the lamp panel 22 is fixed to the back panel 25 and is fixed to the rear cover 13 of the lamp housing 1 through the back panel 25. The specific configuration of a preferred embodiment of the present invention can be understood from the above description. Since the light-emitting diode 220 on the lamp board 22, the reflective wall 211 on the lamp cup 21, and the lens 23 are on the same optical axis, astigmatism is not disposed. In the state of the shutter 24, the light of the light-emitting diode 220 is reflected by the reflective wall 211 on the lamp cup 21 to the lens 23 in addition to being directly collected by the lens 23; since the present invention provides astigmatism in the lamp cup 21 The viscous shutter 24 is located between the light-emitting diode 220 and the lower reflecting surface 211 B of the reflective wall 211. That is, the astigmatism shutter 24 limits the light of the light-emitting diode 220 from the lower reflecting surface 211B. Reflected on the lens 23, in this case, the upper end of the light pattern of the lamp will be reduced in height to avoid direct contact with the vehicle when the lamp is illuminated; and because of the design, the astigmatism problem of the lamp can be effectively improved. FIG. 6 is a cross-sectional view showing another preferred embodiment of the present invention. The basic structure is substantially the same as that of the first preferred embodiment. The difference is that two astigmatism shutters 24 are disposed in the lamp cup 21. 24, in addition to the astigmatism shutter 24 originally located at the edge of the hole of the lamp cup 21, the other astigmatism shutter 24 is located at the upper edge of the lamp cup 21 'the fixing manner is the same as that of the astigmatism shutter 24, and the shape is Suitable for upper and lower symmetry 'Please refer to FIG. 7 , the astigmatism shutter 24 has a curved top end matching the hole edge of the through hole 212 and a horizontal bottom end, and is suitable for 201247451
於發光一極體220光線通過通孔212到達上反射面211A 的光路徑上，亦即利用該散光遮板24,可進一步修整車燈 的光型。 【圖式簡單說明】 圖1係本發明第一較佳實施例的立體圖。 圖2係本發明第一較佳實施例的分解圖。 圖3係本發明第一較佳實施例的主燈組件分解圖。 圖4係本發明第一較佳實施例的前視平面圖。 圖5係本發明第一較佳實施例的剖視圖。 圖6係本發明第二較佳實施例的剖視圖。 圖7係本發明第二較佳實施例的前視平面圖。 【主要元件符號說明】 1〇燈殼 11 前罩 12燈罩板 13 後罩 131固定孔 132 鰭片 20主燈組件 21 燈杯 211反射壁 21 1A上反射面 211B下反射面 211C側反射面 212通孔 213 定位柱 214固定孔 22燈板 220 發光二極體 221楔孔 23透鏡 230 固定部 201247451 231固定孔 232定位孔 24, 24’散光遮板 240楔柱 25背板 9The light of the light-emitting diode 220 reaches the light path of the upper reflecting surface 211A through the through hole 212, that is, the light pattern of the lamp can be further trimmed by the astigmatism shutter 24. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a first preferred embodiment of the present invention. Figure 2 is an exploded view of a first preferred embodiment of the present invention. Figure 3 is an exploded view of the main lamp assembly of the first preferred embodiment of the present invention. Figure 4 is a front plan view of a first preferred embodiment of the present invention. Figure 5 is a cross-sectional view showing a first preferred embodiment of the present invention. Figure 6 is a cross-sectional view showing a second preferred embodiment of the present invention. Figure 7 is a front plan view of a second preferred embodiment of the present invention. [Main component symbol description] 1 lamp housing 11 front cover 12 lamp cover plate 13 rear cover 131 fixing hole 132 fin 20 main lamp assembly 21 lamp cup 211 reflection wall 21 1A upper reflection surface 211B lower reflection surface 211C side reflection surface 212 pass Hole 213 positioning post 214 fixing hole 22 lamp plate 220 light emitting diode 221 wedge hole 23 lens 230 fixing portion 201247451 231 fixing hole 232 positioning hole 24, 24' astigmatism shutter 240 wedge column 25 back plate 9