200923260 九、發明說明： 【發明所屬之技術領域】 特別是指一種可快速 本發明是有關於一種LED燈泡 達到散熱效果的LED燈泡。 【先前技術】 參閱圖卜習知有-種LED燈具1G，主要具有一燈罩 η、-設在燈罩η内部的電路控制以12、—設置在燈罩 η上方處的風扇13、複數個設置在燈罩u下方處的咖 一設在燈罩U上方處的頂蓋板&其中，該燈 欠 中空容槽⑴’中空容槽"1内可供電路控制 置12及風扇13作結合，於燈罩11外周緣處穿設有複數 個進風孔112’該頂蓋板15上洞設有複數個出風口⑸，^ 由風扇η作高速運轉’可由燈罩u進風孔ιΐ2將空氣帶二 電路控制裝置12及LED燈14降、、®里八此 Η々山n , 降纟现，再令熱空氣由頂蓋板 5之出風α 151帶出，藉此達到循環散熱的效果。 上述的LED燈具1〇雖然具有_定的散熱效果， 散熱效率並不理想，習知LED燈具1〇的進風孔HU設置 ^罩"外周側邊，然而，一般轴流式風扇13 ^流的吸引力較薄弱’因此無法有效將空氣吸弓丨進入燈 罩内進订降溫’冷卻效率較差。另外，LED燈14 B六 易產生高熱的元件’習知的LED燈具1〇的風I ^僅^ ^引入的方式，使LED燈14周遭空氣作流動，空氣流動速 度太慢，不足以將咖燈14的高熱快速排I因此無法有 效降低LED燈14白勺發熱量，使用壽命較短。 200923260 【發明内容】 因此，本發明之目的在提供一種可快速達到散熱效果 的led燈泡。 、一於是/發明提供-種LED H包含有_燈泡本體 、-電子單元、一連接單元及一照明單元，其中：該燈泡 具有一螺旋接頭及一接設在螺旋接頭下方處的殼罩， “罩内邛凹空形成有一容納空間，殼罩上緣處開設有一 们以上透通至容納空間内的進氣孔，·肖電子單元設置在燈 泡本體容納”具有—電路板及多數個焊接在電路 板上的電子元件，該電路板在預定位置處透通凹設有一個 =上的孔槽；該連接單元接設在殼罩下方處，纟中間處設 有一層搞板’該隔板上伸設有—具預定高度的管柱，該管 日:Γ电路板樓抵以間隔出一供空氣通過的通氣空間；該 設置在連接單元下方處，具有一散熱板、—接設 、板上方處可對通氣空間產生吸力的風扇、以及-接 熱板下方處的LED燈粒，該LED燈粒可接受風扇吸 入的冷卻氣流進行散熱。 之力放疋在殼罩上緣處設有進氣孔，隔板的管 柱擇抵電路祐卩卩 ^ 、 同有通氣空間’利用風扇從進氣孔吸引 Μ ^ ’、二3内，由上而下直接對led燈粒吹送冷卻 t，错此達到快速散熱之優點。 【貫施方式】 有關本發明夕二 . 刖Μ及其他技術内容、特點與功效，在 以下配合參考圖式 數較佳實施例的詳細說明中，將可清 200923260 楚的呈現。 ㈣圍2及圖3，本”_ φ，±亜4人女^ ^ ^季乂佳實施例 主要包，有-燈泡本體2〇、一電子單元3〇、— 凡40及一照明單元5〇，接著，再將上述各構件 及組合空間型態詳述於后。 狀特欲 該燈泡本體20具有_螺旋接頭21及―接設在螺旋接 :、'下方處的殼罩22，該螺旋接頭21具有正、負兩極， 可螺旋套入預定的燈庙「同土- 厓（圖未不）内進行通電，該殼罩22係 呈上小下大的殼體，其内部凹空形成有一容納空間23(見於 圖4)，該殼罩22上缞垃冰碑> & _ 、 ，接k螺紅接頭21的相接處開設有福 數個進氣孔221，該等進氣孔如透通至容納空間23内。 該電子單元30設置在燈泡本體20的容納空間23内部 具有一電路板31及多數個焊接在電路板31上的電子元 :32,該電路板31在預^位置處透通凹設有多數個圓形孔 槽311 ’另外，該電路板31在邊緣處凹設有一可供空氣通 ，的缺口 312,透過孔槽311及缺口 312的設置，可讓進入 奋、.内工間23内的空氣向下流通至電路板3 1下方處。 该連接單元4〇乃套接設在殼罩22下方處的圓盤體， 其中間處設有—層隔板41 ’該隔板41在預定位置處伸設有 夕數根官柱411及孔洞412，管柱411剛好對應於電路板31 孔槽311的位置，讓空氣得以流通至隔板41下方處，而且 。sfe 411向上凸伸有一定的高度，可對電路板3丨底面作 撐抵，藉此在電路板31下方間隔形成一通氣空間42，通氣 工間42内的空氣可由孔洞412流通至隔板41下方處，且 200923260 通氣空間42還可容納電路板31底部的電 屯卞苓件或接腳， 另外’該連接單元40外側設有一圍牆43，該 4 3 在預 定位置處開設有一與通氣空間42相連通的透氣槽々Μ，在 兩側邊處向下凸伸設有二螺接柱432。 40的下方處，主要且 正上方處的風扇52、 該照明單元50設置在連接單元 有一散熱板5 1、一固設在散熱板5 ! 一固接在散熱板51底下中間處的LED燈粒53、一罢 卓盖设 置在LED燈粒53下方處的透鏡54、以及二可對透鏡54作 鎖接的固定螺絲、55。該散熱板51是以鋁合金高導熱材料製 成’其中間處具有-平板部511(見於圖4)，沿著平板部5ιι 外周處朝上彎曲地延伸設有多數個散熱葉片512，散熱板 在兩側處穿設有二料513，二耳孔513騎對應連接 單兀40的二螺接柱432位置。該風扇52是固接在平板部 511頂面處’與電路板31以電線作成連接，通電後風扇52 作1¾速運轉，可對通氣空間42内的空氣產生吸力。該LED 燈粒53黏貼固定在平板部511底面處，與電路板3i以電線 作成連接，可產生明亮度高的LED燈光源，而熱量藉由散 熱板51及風扇52可快速地進行散熱。該透鏡54是略呈半 圓形狀的透明罩體，LED燈粒53的光源透過透鏡54可向 外發散作照明用途，在透鏡54兩側凸伸設有二耳部54 i 再穿入散熱板51 利用一固定螺絲5 5穿過二耳部5 4 1後 的耳孔5 1 3，最後鎖接在連接單元4〇上的螺接柱432，使 散熱板51及透鏡54得以固定在連接單元4〇上。另外，業 者也可對透鏡54内側表面實施噴砂霧化處理，使向外投射 200923260 出的光源可達到視覺柔和化的效果。 心以上即為本發明LED燈泡各構件形狀及組合空間型能 :概述;接著’再說明本發明的進氣動作以及預期 成之功效陳述如后： “匕運 、參閱圖5,當本發明點亮咖燈粒53並啟動風扇w ，轉日守’燈泡本體2〇外部的空氣可從上方進氣孔22ι吸入 内二間23内，此時冷空氣首先會對電子單元30的電子 32進行降溫冷卻’以避免電子元件32使用過久燒毀 損壞’再來，2氣可透過電路板31的孔槽3ιι或缺口 M2 到達通氣空間42内，再經由連接單元4〇的管柱411及孔 洞412而流通至隔板41下方處，最後藉由風扇52運轉吹 达下，空氣形成一冷卻氣流對散熱板51及LED燈粒53冷 部降溫，將熱量透過散熱板5丨外周的散熱葉片5丨2帶出， 如此可得到循環冷卻的效果。 綜上所述’本發明LED燈泡主要是為了解決習知led 長日守間使用溫度容易上昇的問題，本發明的技術手段主 要疋利用§玄燈泡本體2 0設置進氣孔2 2 1供空氣流入，可對 電子元件32作降溫冷卻’延長電子元件32的使用壽命， 另外’該照明單元5 0具有一散熱板51、一風扇5 2及一 LED燈粒53 ’使風扇52運轉後，可直接對散熱板51及 LED燈粒53吹送冷卻氣流，因此LED燈粒53產生的高熱 ，可迅速地被冷卻氣流及散熱板5 1分散帶出，散熱效能極 為顯著，藉此可達到延長使用壽命的效果。 值得一提的是，本發明可衍生不同的實施態樣，參閱 200923260 圖6、圖7，本發明在第二較佳 太髀，Λτ 竿又佳戶、％例中，主要具有一燈泡 本體20 1、一電子單元3〇、一 5〇 , — 遇接早兀40及一照明單元 /、苐一貫施例最大的不同處在 罢τ丄 y、.燈泡本體20 I的殼 在側邊處開設有一插入口 221 τ 糾/+ W ’邊插入口 221 I可 七、一感應開關60作插入，該咸庫 必U應開關60乃略呈[形，其 一端設有一可從插入口 221〗 ’、 ^ ^ 展子早兀30相連接的 接碩私61 ’而另一端則朝下右 …… ㈣朝下°又有-可感應人體走近以啟動 ‘、?、月早兀50的感應端62，藉此 j这測人體遠近自動開關達 到便利使用的效果，又兼具有省電的功能。 參閱圖8、目9,本發明在第三較佳實施例中’主要具 :泡本體2〇、-電子單元3〇、-連接單元40及另一 ,¾明單元70，盘第一营絲也I具4* ^ 、弟貫鉍例最大的不同處在於：照明單元 7〇具有-散熱板71、—風扇72、—咖燈粒^及一透鏡 4,該散熱板71外周設有多數個彎折呈錐形狀的散熱葉片 其内部中央處則向上隆起設有—凸面部712,該凸面 4 712的頂底兩面分別可供安裝風扇72及LED燈粒73， 使照明單元7 0内部|右相者官蚪 八有相田見敞的空氣流動空間，具有提 升散熱效率的效果。 I·隹乂上所述者，僅為本發明之數較佳實施例而已，當 不能以此限定本發明實施之範圍，即大凡依本發明申請專 利範圍及發明說明内容所作之簡單的等效變化與修飾，皆 仍屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是習知LED燈具的組合剖視圖； 10 200923260 Θ是本毛明LED燈泡第一較佳實施例的立體圖； 圖3是上述較佳實施例的分解立體圖，說明本發 S —燈泡本體、一雷工_ 冤子早兀、一連接單元及一照明單元； 圖4疋上述較佳實施例的半剖圖； 圖5是上述較佳實施例的動作圖，說明空氣進入燈泡 本體内進行散熱的情形； / 3 6疋本發明第二較佳實施例的分解立體圖，說明本 發明包含—燈泡本體、一電子單元、一連接單元、一照明 單元及—感應開關； 圖7是上述較佳實施例的組合立體圖； 圖8是本發明第三較佳實施例的分解立體圖，說明本 發明包含一燈泡本體、一電子單元、—連接單元及另一照 明單元；及 圖9是上述較佳實施例的組合剖視圖。 11 200923260 【主要元件符號說明】 20......... •燈泡本體 5 12··· •…散熱葉片 21......... •螺旋接頭 513 ··· …·耳孔 22......... •殼罩 52……· ...風扇 221 ....... _進氣？L 53……· ....LED 燈粒 23......... •容納空間 54•…· …·透鏡 3 0......... •電子單元 541 ·· …耳部 31......... _電路板 55 •.… • · · ·固定螺絲 311 ....... .孔槽 20 I · •…燈泡本體 312....... .缺口 22 I ·· •…殼罩 ······· •電子元件 221 I .…插入口 40......... 連接單兀 60··..· •…感應開關 41......... •隔板 61 ·.··· •…接頭端 41 1 ....... •管柱 62••… 感應^而 412....... •孔洞 70··... •…另一照明單元 42......... •通氣空間 71 ••… —散熱板 43......... •圍牆 711 ··· •…散熱葉片 431 ....... •透氣槽 712… • · · ·凸面部 432…… •螺接柱 72 ….風扇 50........ •照明單元 73 …-LED燈粒 5 1........ •散熱板 74••… …·透鏡 5 11…… •平板部 12200923260 IX. Description of the invention: [Technical field to which the invention pertains] In particular, it relates to a quick-discovering LED bulb in which the LED bulb achieves a heat dissipation effect. [Prior Art] Referring to Fig. 2, there is a type of LED lamp 1G, which mainly has a lamp cover η, a circuit control provided inside the lamp cover η, 12, a fan 13 disposed above the lamp cover n, and a plurality of lamps arranged under the lamp cover u The coffee is located at the top of the lampshade U. The lamp is owed to the hollow cavity (1). The hollow cavity "1 can be used for the circuit control 12 and the fan 13 to be combined on the outer periphery of the lamp cover 11. There are a plurality of air inlet holes 112'. The top cover plate 15 is provided with a plurality of air outlets (5), and the fan η is operated at a high speed. The air can be driven by the fan cover u into the air holes ι 2 to control the air circuit 2 The LED lamp 14 is lowered, and the ® is in the middle of the mountain, and the hot air is taken out by the air outlet α 151 of the top cover 5, thereby achieving the effect of circulating heat dissipation. Although the above-mentioned LED lamp 1 has a certain heat dissipation effect, the heat dissipation efficiency is not ideal, and the conventional air inlet hole of the LED lamp 1 is provided with a cover " outer peripheral side, however, the general axial flow fan 13 The attraction is weaker - so it is not effective to suck the air into the lampshade and make the cooling down. The cooling efficiency is poor. In addition, the LED lamp 14 B is easy to produce high-heat components. [The conventional LED lamp 1〇 wind I ^ only ^ ^ introduced in such a way that the LED lamp 14 around the air flow, the air flow rate is too slow, not enough to The high heat and fast discharge of the lamp 14 can not effectively reduce the heat generation of the LED lamp 14, and the service life is short. 200923260 SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a LED bulb that can quickly achieve a heat dissipation effect. The LED H includes a bulb body, an electronic unit, a connecting unit and a lighting unit, wherein: the bulb has a screw joint and a cover attached below the screw joint, A recessed space is formed in the recess in the cover, and an air inlet hole is formed in the upper edge of the cover to penetrate into the receiving space, and the electronic unit is disposed in the bulb body to have a circuit board and a plurality of soldering circuits. An electronic component on the board, the circuit board is recessed at a predetermined position and provided with an upper slot; the connecting unit is connected below the cover, and a layer is formed at the middle of the raft. Provided with a predetermined height of the pipe string, the pipe day: the circuit board floor is spaced apart to provide a ventilation space for air to pass through; the arrangement is below the connecting unit, has a heat sink, the connection, the upper part of the board A fan that can generate suction to the venting space, and an LED illuminator below the hot plate, the LED granules can be cooled by the cooling airflow drawn by the fan. The force is placed at the upper edge of the casing with an air inlet hole, and the pipe column of the partition plate is connected to the circuit, and the same ventilation space is used to draw the Μ ^ ', 2, 3 from the air intake hole by the fan. The cooling light is blown directly from the top to the bottom of the LED lamp, which is the advantage of rapid heat dissipation. [Comprehensive Mode] In the following detailed description of the preferred embodiment with reference to the drawings, the present invention will be presented in the detailed description of the preferred embodiments of the present invention. (4) Encircle 2 and Figure 3, this "_ φ, ± 亜 4 female ^ ^ ^ 季乂佳 The main package of the embodiment, there are - bulb body 2 〇, an electronic unit 3 〇, - 40 and a lighting unit 5 〇 Then, the above-mentioned components and the combined spatial patterns are described in detail later. The bulb body 20 has a screw joint 21 and a casing 22 attached to the lower side of the screw connection: 21 has positive and negative poles, which can be spirally inserted into a predetermined lamp temple "electrical power in the same soil - cliff (not shown). The casing 22 is a small and large casing, and the inner hollow is formed with a receiving space. The space 23 (see FIG. 4), the cover 22 is provided with a plurality of air inlet holes 221 at the junction of the k-red red joints 21, and the air inlet holes are transparent. The electronic unit 30 is disposed inside the accommodating space 23 of the bulb body 20 and has a circuit board 31 and a plurality of electronic components 32 soldered on the circuit board 31. The circuit board 31 is at a pre-position. The through hole is provided with a plurality of circular holes 311'. In addition, the circuit board 31 is recessed at the edge with a gap 312 for air passage. The slot 311 and the notch 312 are disposed to allow the air entering the interior of the interior chamber 23 to flow downwardly below the circuit board 3 1. The connecting unit 4 is a sleeve that is sleeved under the cover 22 The middle portion of the body is provided with a layer partition plate 41'. The partition plate 41 is provided with a plurality of official poles 411 and a hole 412 at a predetermined position. The column 411 just corresponds to the position of the hole 311 of the circuit board 31. The air can flow to the lower portion of the partition 41, and the sfe 411 protrudes upward to a certain height to support the bottom surface of the circuit board 3, thereby forming a ventilation space 42 under the circuit board 31, and the ventilation room The air in 42 can be circulated through the hole 412 to the lower portion of the partition 41, and the 200923260 venting space 42 can also accommodate the electric piece or the pin at the bottom of the circuit board 31. In addition, a wall 43 is disposed outside the connecting unit 40. 4 3 is provided at a predetermined position with a venting groove communicating with the venting space 42. Two screwing posts 432 are protruded downward at the two sides. At the lower side of the 40, the fan 52 is mainly at the upper side. The lighting unit 50 is disposed on the connecting unit and has a heat dissipation plate 5 1 One is fixed on the heat dissipation plate 5; an LED lamp particle 53 fixed in the middle of the bottom of the heat dissipation plate 51, a lens 54 disposed at a position below the LED lamp particle 53, and two lenses that can be locked to the lens 54 a fixing screw, 55. The heat dissipating plate 51 is made of an aluminum alloy high heat conductive material, and has a flat portion 511 (see FIG. 4) at the middle thereof, and a plurality of heat radiating upwards along the outer periphery of the flat portion 5 ιι The blade 512 has two strips 513 disposed on both sides of the heat dissipating plate, and the two ear holes 513 ride on the positions of the two screw posts 432 corresponding to the connecting unit 40. The fan 52 is fixed to the top surface of the flat plate portion 511 and is connected to the circuit board 31 by electric wires. After being energized, the fan 52 operates at a speed of 13⁄4, and suction is generated to the air in the ventilation space 42. The LED lamp particles 53 are adhered and fixed to the bottom surface of the flat plate portion 511, and are connected to the circuit board 3i by wires, thereby generating a high-brightness LED light source, and the heat can be quickly dissipated by the heat radiating plate 51 and the fan 52. The lens 54 is a transparent cover having a semi-circular shape. The light source of the LED lamp 53 can be diverge outwardly for illumination. The two sides of the lens 54 are protruded from the ear 54 and then penetrated into the heat sink 51. A fixing screw 5 5 is passed through the ear hole 5 1 3 behind the two ear portions 5 4 1 , and finally the screwing post 432 is locked on the connecting unit 4〇, so that the heat dissipation plate 51 and the lens 54 are fixed to the connecting unit 4〇. on. In addition, the inside of the lens 54 can also be subjected to sandblasting treatment to make the light source of the 200923260 outward visually soften. Above the heart is the shape and combination space type of each component of the LED bulb of the present invention: an overview; then, the air intake action of the present invention and the expected effect of the invention are described as follows: "匕, see Figure 5, when the present invention is The light coffee light 53 and the fan w are activated, and the external air of the bulb body 2 can be sucked into the inner two chambers 23 from the upper air inlet 22, at which time the cold air first cools the electronic 32 of the electronic unit 30. Cooling 'to avoid the use of the electronic component 32 for a long time to burn and damage', the second gas can pass through the hole 3 or the gap M2 of the circuit board 31 to reach the ventilation space 42, and then pass through the column 411 and the hole 412 of the connection unit 4 Circulating to the lower portion of the partition 41, and finally being blown by the fan 52, the air forms a cooling airflow to cool the cooling plate 51 and the cold portion of the LED lamp grain 53, and the heat is transmitted through the heat dissipating fins 5丨2 of the outer periphery of the heat dissipating plate 5 Bringing out, the effect of circulating cooling can be obtained. In summary, the LED bulb of the present invention is mainly for solving the problem that the temperature of the conventional LED is easy to rise, and the technical means of the present invention mainly utilizes the „玄灯本. 20, the air inlet hole 2 2 1 is provided for air inflow, and the electronic component 32 can be cooled and cooled to extend the service life of the electronic component 32. In addition, the lighting unit 50 has a heat dissipation plate 51, a fan 52 and an LED. After the lamp particles 53' operate the fan 52, the cooling airflow can be directly blown to the heat dissipation plate 51 and the LED lamp particles 53. Therefore, the high heat generated by the LED lamp particles 53 can be quickly dispersed by the cooling airflow and the heat dissipation plate 51, and the heat is dissipated. The performance is extremely significant, thereby achieving the effect of prolonging the service life. It is worth mentioning that the present invention can derive different implementations. Referring to 200923260, FIG. 6, FIG. 7, the present invention is in the second preferred embodiment, Λτ 竿In addition, in the case of a good household, the main one has a bulb body 20 1 , an electronic unit 3 〇 , a 5 〇 , — the encounter with the early 兀 40 and a lighting unit /, the biggest difference in the consistent application of the 施 丄 丄y, the casing of the bulb body 20 I has an insertion port 221 at the side of the side τ 纠 / + W 'side insertion port 221 I can be seven, a sensor switch 60 for insertion, the salt warehouse must U switch 60 is slightly [Shape, one end has one available from the insertion port 221〗 ', ^ ^ The exhibition is connected to the 30-year-old connection of the Shuo private 61' and the other end is facing down to the right... (4) Downward ° and there is - can sense the human body approaching to start the ', ?, month early 50 sensing end 62, borrow This j-measures the human body's near-and-close automatic switch to achieve the effect of convenient use, and also has the function of saving electricity. Referring to Fig. 8 and Fig. 9, in the third preferred embodiment, the present invention mainly includes: the bubble body 2〇, - The electronic unit 3〇, the connection unit 40 and the other, the unit 70, the first camp wire also has 4*^, the biggest difference is that the lighting unit 7 has a heat sink 71, a fan 72, a coffee light granule, and a lens 4, wherein the outer surface of the heat dissipation plate 71 is provided with a plurality of heat-dissipating fins which are bent in a tapered shape, and a central portion thereof is raised upwardly with a convex portion 712, the convex surface 712 Fans 72 and LED lamp particles 73 can be installed on both sides of the top and bottom, so that the interior of the lighting unit 70 | the right side of the official residence has an air flow space that is open to the field, which has the effect of improving heat dissipation efficiency. The above description is only for the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent of the scope of the invention and the description of the invention. Variations and modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional LED lamp; 10 200923260 is a perspective view of a first preferred embodiment of the present invention; FIG. 3 is an exploded perspective view of the preferred embodiment of the present invention S - bulb body, a laser _ 冤 兀 兀, a connecting unit and a lighting unit; Figure 4 is a half cross-sectional view of the above preferred embodiment; Figure 5 is an action diagram of the above preferred embodiment, illustrating air ingress The heat dissipation of the light bulb body; / 3 6 is an exploded perspective view of the second preferred embodiment of the present invention, illustrating that the present invention comprises a bulb body, an electronic unit, a connecting unit, a lighting unit and an inductive switch; 8 is an exploded perspective view of the preferred embodiment of the present invention; FIG. 8 is an exploded perspective view of a third preferred embodiment of the present invention, illustrating a light bulb body, an electronic unit, a connecting unit, and another lighting unit; A combined cross-sectional view of the above preferred embodiment. 11 200923260 [Description of main component symbols] 20......... • Bulb body 5 12··· •...heating fins 21......... •Spiral joint 513 ·····ear hole 22......... • Shell 52...·...fan 221 ....... _ intake? L 53......·..LED lamp grain 23......... • accommodation space 54•...·... lens 3 0......electronic unit 541 ·· ... Ear 31......... _Circuit board 55 •.. • · · · Fixing screw 311 ....... . Hole 20 I · •... Lamp body 312... . Notch 22 I ·· •...Shell ·······•Electronic component 221 I ....Insert port 40......... Connection unit 60··..·... 41......... • Partition 61 ····· •... Connector end 41 1 ....... • Column 62••... Induction^ and 412....... • Hole 70··... •...Another lighting unit 42......... • Ventilation space 71 ••... — Heat sink 43......... • Wall 711 ··· •...heat-dissipating vane 431 ....... • Breathable groove 712... • · · · convex surface 432... • screw post 72 .... fan 50........ • lighting unit 73 ...-LED Lamp grain 5 1........ • Heat sink 74••... Lens 5 11... • Flat section 12