201040454 -- 六、發明說明： - 【發明所屬之技術領域】 本發明涉及一種發光二極體燈具，尤係一種提供 較大照明面積之發光二極體燈具。 【先前技術】 發光二極體光源作為一種新興之第三代光源，雖 然現在還不能大規模取代習知之白熾燈，但是其具 Ο 有工作壽命長、節能、環保等優點，而普遍被市場 看好。而且，目前由發光二極體組成之模組能產生 大功率、高亮度之光源，因此將廣泛地、革命性地 取代習知之白熾燈等現有之光源，進而成為符合節 能環保主題之主要光源。 隨者發光二極體或其模組之功率、亮度之增大， 其產生之熱量也越來越大，若不能妥善解決發光二 ^ 極體之發熱問題，則發光二極體燈具之工作壽命將 受到嚴重影響。因此通常都在燈具内設置由與發光 二極體模組接觸之散熱器以對發光二極體模組進行 散熱。然而，燈具之發光二極體模組一般是被水平 貼置於政熱器一侧而形成平面光源，此類平面光源 不僅產生之熱量比較集中同時其照射方向單一、照 射面積也有限，而無法在燈具周圍形成均勻柔和之 照明燈光’進而在很多情況下都難以使用戶滿意。 【發明内容】 4 201040454 有鑒於此’有必要提供一種具有較大照明面積之 * 發光二極體燈具。 一種發光二極體燈具，包括一第一散熱器、固定 在第一散熱ι§底部之第二散熱器、貼設於該第二散 熱器上之複數發光二極體模組及罩設第二散熱器並 與第-散熱器合固定之燈罩，該第二散熱器具有 複數呈層次分佈、大小不同之導熱端面，該發光二 ❹ 極體模組對應貼置於該導熱端面上，該燈罩包括設 有凹透鏡結構之複數台階，該台階對應發光二極體 模組設置，發光二極體模組發出之光線經過燈罩台 階後向外照射以得到一較大之照明區域。 與習知技術相比，本發明中燈罩之台階設有凹透 鏡結構，使發光二極體模組發出之具有固定方向之 光線經台階後發散以得到一較大之照明區域。 【實施方式】 〇 圖1至圖4所示，本發明之發光二極體燈具包括 一定位柱10、與定位柱10配合之第一散熱器20、 貼設並固定在第一散熱器20底部之第二散熱器30、 貼置於第二散熱器30之複數發光二極體模組34及 罩設第二散熱器30並與第一散熱器20配合固定之 燈罩40。定位柱10用來將發光二極體燈具固定在需 要之位置’如房屋之頂部等。 請參閱圖2和圖3，該定位柱10包括一圓形基 5 201040454 板12及由基板12中央垂直向上延伸之中空套筒 • 14。基板12中央設有一穿孔120,基板12之外周緣 處均勻、間隔地開設三個固定孔i 2 2，以便固定件（圖 未示）穿過將定位柱1〇與第一散熱器2〇固定。 該第一散熱器20由導熱性能良好之鋁、銅等金 屬材料一體形成，其包括一底座22、由底座22中央 垂直向上延伸之中空導熱筒24和同時沿導熱筒24 Ο 徑向向外延伸及底座22上表面向上延伸之複數散熱 片26。導熱筒24頂端沿周向均勻設有三個定位^ 240’該定位孔240與第一散熱器之固定孔ι22 一一 對應設置，以便穿過固定孔122之固定件螺鎖固定 在第一散熱器之定位孔240内，從而將定位柱1〇與 第一散熱器20固定一起。該底座22底部設有一圓 形之收容槽220,用來收容第二散熱器3〇之底部， 該收容槽220還可用于容置一夾置在第二散熱器3〇 〇 底端與燈罩40之間之一防水圈（圖未示），以防止 雨水、灰塵等物體滲入發光二極體燈具内。 該第一散熱30包括相互套置之複數散熱單元 32。母一散熱卓元32由導熱性能良好之|呂、銅等金 屬材料一體形成，其包括一圓筒狀之中空導熱部320 及從該導熱部320外周面沿導熱部320徑向垂直向 外延伸之複數鰭片322。該導熱部320之一端形成一 平坦之導熱端面’另一端則貼設並固定於第一散熱 6 201040454 器20之底座22底部。該複數散熱單元32之内徑及 • 外徑沿第一散熱器20到燈罩4〇之方向逐漸縮小。 而其高度沿第一散熱器20到燈罩4()之方向逐漸變 大。從而，這些散熱單元32依次相互套設，形成外 形為一塔狀之第二散熱器3〇。 該發光二極體模組34與該第二散熱器3〇散熱單 凡32之導熱端面一一對應貼置。每一發光二極體模 ❹ 組34包括呈圓環形片體之電路板340及均勻貼設於 電路板340之發光二極體元件342，該發光二極體模 組34之電路板34〇之内徑、外徑大小與其貼設之散 熱單元32導熱部320之内徑、外徑大小對應，即貼 置於散熱單7G 32導熱部320之導熱端面上之發光二 極體模組34之内徑、外徑沿第一散熱器2〇到燈罩 40之方向逐漸縮小。由於發光二極體模組％依次貼 設在高度及大小逐漸變化之散熱單元32上，故由發 〇 光二極體模組34發出之光處於不同層次，可以提^ 強度及照射面積不等之光源。 八 ,該燈罩40由有機玻璃或樹脂等透明或半透明材 料製成，其作用相當於—凹透鏡，呈塔狀外形，其 大小正好將第二散熱器30罩設其内，且其頂端正好 插入第一散熱器底部之收容槽22〇内。燈罩4〇包括 -圓形底蓋42、沿底Μ 42周緣逐漸向外擴展延：之 複數環狀之台階44及相鄰台階44之間之侧壁46。 7 201040454 該台階44直徑大小在遠離底蓋42之方向上逐漸增 加’且與發光二極體模組34之大小一一對應，以便 發光二極體模組34發出之光可以直接照射到相應之 台階44上。每一台階44之表面設有一凹透鏡結構 48，因此，發光二極體模組34發出之光經凹透鏡結 構48後發散以得到一較大之照明區域。 該發光二極體燈具組裝時，第二散熱器30之散201040454 - VI. Description of the Invention: - Technical Field of the Invention The present invention relates to a light-emitting diode lamp, and more particularly to a light-emitting diode lamp which provides a large illumination area. [Prior Art] As a new generation of light source, the light-emitting diode light source can not replace the conventional incandescent lamp on a large scale, but it has the advantages of long working life, energy saving and environmental protection, and is generally favored by the market. . Moreover, the current module consisting of a light-emitting diode can generate a high-power, high-brightness light source, and thus will widely and revolutionarily replace the existing light source such as an incandescent lamp, and thus become the main light source that meets the energy-saving environmental protection theme. The power and brightness of the light-emitting diode or its module increase, and the heat generated by it is also increasing. If the heat problem of the light-emitting diode is not properly solved, the working life of the light-emitting diode lamp Will be seriously affected. Therefore, a heat sink that is in contact with the light emitting diode module is usually disposed in the lamp to dissipate the light emitting diode module. However, the illuminating diode module of the luminaire is generally placed horizontally on the side of the e Regulator to form a planar light source. Such a planar light source not only generates relatively concentrated heat but also has a single illumination direction and a limited illumination area, and cannot The formation of uniform and soft lighting around the luminaires is in many cases difficult to satisfy the user. SUMMARY OF THE INVENTION 4 201040454 In view of this, it is necessary to provide a light-emitting diode lamp having a large illumination area. A light-emitting diode lamp includes a first heat sink, a second heat sink fixed at a bottom of the first heat dissipation layer, a plurality of light-emitting diode modules attached to the second heat sink, and a second cover The heat sink is fixed to the first heat sink, and the second heat sink has a plurality of heat conducting end faces of different sizes and different sizes. The light emitting diode body module is correspondingly disposed on the heat conducting end face, and the lamp cover comprises The plurality of steps of the concave lens structure are provided, and the step is corresponding to the LED module, and the light emitted by the LED module is irradiated to the outside through the lamp cover step to obtain a larger illumination area. Compared with the prior art, the step of the lampshade of the present invention is provided with a concave lens structure, so that the light having a fixed direction emitted by the light-emitting diode module is diverged through the step to obtain a larger illumination area. [Embodiment] As shown in FIG. 1 to FIG. 4, the LED lamp of the present invention includes a positioning post 10, a first heat sink 20 mated with the positioning post 10, and is attached and fixed to the bottom of the first heat sink 20. The second heat sink 30 , the plurality of light emitting diode modules 34 attached to the second heat sink 30 , and the light cover 40 that covers the second heat sink 30 and are fixed to the first heat sink 20 . The positioning post 10 is used to fix the LED illuminator at a desired location, such as the top of a house. Referring to Figures 2 and 3, the positioning post 10 includes a circular base 5 201040454 plate 12 and a hollow sleeve 14 extending vertically upward from the center of the substrate 12. A through hole 120 is defined in the center of the substrate 12, and three fixing holes i 2 2 are evenly and spacedly disposed at the outer periphery of the substrate 12, so that a fixing member (not shown) passes through the fixing post 1〇 and the first heat sink 2〇. . The first heat sink 20 is integrally formed of a metal material such as aluminum or copper having good thermal conductivity, and includes a base 22, a hollow heat conducting tube 24 extending vertically upward from the center of the base 22, and simultaneously extending radially outward along the heat conducting tube 24 And a plurality of fins 26 extending upward from the upper surface of the base 22. The top end of the heat conducting tube 24 is uniformly provided with three positioning holes 240' in the circumferential direction. The positioning holes 240 are disposed in one-to-one correspondence with the fixing holes ι22 of the first heat sink, so that the fixing member passing through the fixing hole 122 is screwed to the first heat sink. The positioning hole 240 is positioned to fix the positioning post 1〇 with the first heat sink 20. The bottom of the base 22 is provided with a circular receiving slot 220 for receiving the bottom of the second heat sink 3 . The receiving slot 220 can also be used for receiving a clip at the bottom end of the second heat sink 3 and the lamp cover 40 . There is a waterproof ring (not shown) to prevent rain, dust and other objects from penetrating into the LED. The first heat sink 30 includes a plurality of heat sink units 32 that are nested with each other. The heat-dissipating element 32 is integrally formed of a metal material such as Lu, copper, etc., which comprises a cylindrical hollow heat conducting portion 320 and extends radially outward from the outer peripheral surface of the heat conducting portion 320 along the heat conducting portion 320. A plurality of fins 322. One end of the heat conducting portion 320 forms a flat heat conducting end surface. The other end is attached and fixed to the bottom of the base 22 of the first heat sink 6 201040454. The inner diameter and the outer diameter of the plurality of heat dissipating units 32 gradually decrease in the direction from the first heat sink 20 to the shade 4 . The height thereof gradually increases in the direction of the first heat sink 20 to the shade 4 (). Therefore, the heat dissipating units 32 are sequentially sleeved with each other to form a second heat sink 3〇 having a tower shape. The light-emitting diode module 34 is placed in one-to-one correspondence with the heat-dissipating end faces of the heat-dissipating heat sinks 32 of the second heat sink 3 . Each of the light-emitting diode modules 34 includes a circuit board 340 having a circular ring body and a light-emitting diode element 342 uniformly attached to the circuit board 340. The circuit board 34 of the light-emitting diode module 34 The inner diameter and the outer diameter of the radiating unit 32 correspond to the inner diameter and the outer diameter of the heat conducting portion 320 of the heat dissipating unit 32, that is, the light emitting diode module 34 attached to the heat conducting end surface of the heat conducting portion of the heat sink unit 7G 32. The inner diameter and the outer diameter are gradually reduced in the direction from the first heat sink 2 to the globe 40. Since the light-emitting diode modules are sequentially attached to the heat-dissipating unit 32 whose height and size are gradually changed, the light emitted by the light-emitting diode module 34 is at different levels, and the intensity and the irradiation area can be increased. light source. 8. The lampshade 40 is made of a transparent or translucent material such as plexiglass or resin, and functions as a concave lens having a tower-like shape, which is sized to cover the second heat sink 30, and the tip of the cover 30 is inserted. The receiving groove 22 of the bottom of the first heat sink is inside. The lamp cover 4 includes a circular bottom cover 42 extending gradually along the circumference of the bottom cymbal 42: a plurality of annular steps 44 and side walls 46 between adjacent steps 44. 7 201040454 The diameter of the step 44 is gradually increased in the direction away from the bottom cover 42 and corresponds one-to-one with the size of the LED module 34, so that the light emitted by the LED module 34 can be directly irradiated to the corresponding one. On the step 44. A concave lens structure 48 is disposed on the surface of each of the steps 44. Therefore, the light emitted by the LED module 34 is diverged by the concave lens structure 48 to obtain a larger illumination area. When the light-emitting diode lamp is assembled, the second heat sink 30 is scattered
熱單元32豎立在第一散熱器20底座22之收容槽内 220内並直接貼設固定在第一散熱器2〇之底座22 上，也可通過螺釘分別將散熱單元32固定在第一散 熱器20底座22之底部。燈罩5〇之頂端插入第一散 熱器20之底座22内而與第一散熱器2〇之底座22 配合固定，從而將第二散熱器30罩設于發光二極體 燈具内。 發光二極體模組34產生之熱量部分直接通過第 一散熱器30之散熱單元32散熱，而另一部分埶量 通過散熱單元32傳遞到第—散熱器20底座22 I， 此部分熱量再通過第一散熱器2〇之散熱片％將孰 量散發到空氣中去。由於散熱片26直接與料 空亂接觸’而能更有效地將熱量散發出去。同時， 貼设於第二散熱器3〇之散 z 双熟早儿32之發光二極體 模、.且34與燈罩40之台階44 一 _ 體模組30發出之具有一定 、’以 又“ 一極 疋方向之較強光線經燈罩4〇 8 一寬廣之The heat unit 32 is erected in the receiving slot 220 of the base 22 of the first heat sink 20 and directly attached to the base 22 of the first heat sink 2, and the heat sink unit 32 can be fixed to the first heat sink by screws. 20 the bottom of the base 22. The top end of the lamp cover 5 is inserted into the base 22 of the first heat sink 20 to be fixedly coupled with the base 22 of the first heat sink 2, so that the second heat sink 30 is housed in the light-emitting diode lamp. The heat generated by the LED module 34 is directly radiated through the heat dissipation unit 32 of the first heat sink 30, and the other portion is transferred to the base 22I of the first heat sink 20 through the heat dissipation unit 32. A heat sink 2% of the heat sink will release the amount of air into the air. Since the fins 26 are directly in contact with the material, the heat can be dissipated more efficiently. At the same time, the light-emitting diode model attached to the second heat sink 3, and the step 44 of the lampshade 40, the body module 30 emits a certain, 'to again' A strong light in the direction of the pole passes through the lampshade 4〇8
201040454 台階44之凹透鏡結構48後向外發散形成 照射區域。 與習知技術相比，該發光二極體燈具之燈罩4〇 台階4 4表面設有凹透鏡結構4 8，使發光二極體模組 發出之具有固定方向之光線經台階44向外折射後得 到一較大之照明區域。 f 可以理解地’該第二散熱器3G可由金屬材料_ 體成型呈塔形，其一端形成複數具有呈層次分佈、 幻不同之導熱端面，發光二極體模組對應貼置 於導熱端面上。 綜上所述，本發明確已符合發明專利之要件，遂 依法提出專利申請。惟’以上所述者僅為本發明之 較佳實施方式’自不能以此限制本案之申請專利範 圍。舉凡減本案技藝之人士援依本發明之精神所 作之等效修飾或變化，皆應涵蓋於以下申請專利範 圍内。 【圖式簡單說明】 圖1係本發明發光二極體燈具之立體組合圖。 圖2係圖1中發光二極體燈具之立體分解圖。 圖3係圖1中發光二極體燈具之倒置分解圖。 圖4係圖2中燈罩之剖面圖。 9 201040454 【主要元件符號說明】 定位柱 10 第一散熱器 20 第二散熱器 30 發光二極體模組 34 燈罩 40 基板 12 中空套筒 14 穿孔 120 固定孔 122 底座 22 中空導熱筒 24 散熱片 26 定位孔 240 收容槽 220 散熱單元 32 中空導熱部 320 鰭片 322 電路板 340 發光二極體元件342 底蓋 42 台階 44 侧壁 46 凹透鏡結構 48 燈罩 50 10The concave lens structure 48 of the step 40 of 201040454 is diverged outwardly to form an illuminated area. Compared with the prior art, the surface of the lampshade 4 〇 step 44 of the illuminating diode lamp is provided with a concave lens structure 4 8 , so that the light with a fixed direction emitted by the illuminating diode module is outwardly refracted by the step 44 to obtain A larger illuminated area. f. It can be understood that the second heat sink 3G can be formed into a tower shape by a metal material, and one end of the second heat sink 3G is formed with a plurality of thermally conductive end faces which are hierarchically distributed and different in illusion, and the light emitting diode module is correspondingly disposed on the heat conducting end surface. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the patent application of the present invention is not limited thereto. Equivalent modifications or variations in accordance with the spirit of the invention should be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective assembled view of a light-emitting diode lamp of the present invention. 2 is an exploded perspective view of the light-emitting diode lamp of FIG. 1. 3 is an inverted exploded view of the light-emitting diode lamp of FIG. 1. Figure 4 is a cross-sectional view of the lamp cover of Figure 2. 9 201040454 [Main component symbol description] Positioning post 10 First heat sink 20 Second heat sink 30 Light-emitting diode module 34 Lamp housing 40 Substrate 12 Hollow sleeve 14 Perforation 120 Fixing hole 122 Base 22 Hollow heat-conducting tube 24 Heat sink 26 Positioning hole 240 receiving groove 220 heat dissipating unit 32 hollow heat conducting portion 320 fin 322 circuit board 340 light emitting diode element 342 bottom cover 42 step 44 side wall 46 concave lens structure 48 lamp cover 50 10