、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，尤其涉及一 種具有散熱結構之發光二極體燈具。 【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傳統之白熾燈，惟，其 具有工作壽命長、節能、環保等優點，而普遍被市 場所看好。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，完全可以取代現有白 熾燈實現室内外照明，亦將廣泛地、革命性地取代 傳統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。 然而，功率、亮度越大之發光二極體或其模組 產生之熱量越大，且在體積相對較小之發光二極體 燈具内難於散發出去。故，發光二極體尚存在較大 散熱技術瓶頸，這亦係目前大功率、高亮度發光二極 體燈具市場化最難突破之關鍵之處。目前業界通用 之散熱方案係在該燈具内設置一散熱器，通過該散 熱器表面與自然對流空氣接觸之方式將熱量散發到 周圍空氣中。所以要滿足高功率、高亮度之發光二 極體燈散熱需求以使其能正常工作防止光衰，就必 須提供散熱面積很大之散熱器。這樣通常會導致散 1321630 . 熱器在燈具中所占體積大，整體燈具體積亦大，使得 這種燈具結構體積較大而難以在室内照明中推廣應 ' 用。 【發明内容】 有鑒於此，有必要提供一種用在發光二極體燈 具内具有較佳散熱性能之散熱裝置。 一種具有散熱結構之發光二極體燈具，其包括 籲 燈座、與該燈座連接之一散熱器、和與該散熱器 導熱連接之複數發光二極體模組，該散熱器包括一 中空筒體’該筒體一端與周圍空氣連通，該筒體另 一端與該燈座連通，該燈座上設置有與周圍空氣連 通之複數通氣孔。 上述發光二極體燈具之散熱器筒體内與該燈座 形成-内迴圈之氣流通路能有效地加強氣流流通及 φ 加大散熱器與氣流接觸之面積，從而可在有限之體 積内實現燈具之良好散熱’進而解決了高功率發光 二極體燈具之散熱問題。 【實施方式】 圖1-2示出本發明具有散熱結構之發光二極體 燈具之第一實施例，並句括一网虎 /、巴栝燈座忉、與該燈座10 連接之散熱H 20、均自貼設在該散熱器2Q表面上 之複數發光二極體模組3〇和安裝在該燈座1〇内之 氣流產生裝置40 (如圖4所示）。 4 上^燈座10包括-燈帽12、連接於該燈帽12 一 ί一第一蓋體14和與該第一蓋體14對扣之一第 一盖體16。該燈帽12為一標準螺紆蛛Αγ7 並 勹知早螺紋燈帽，適配于 曰通螺合式燈頭。該第一芸濟盔 , , 乐1體14為一由塑膠材料製 成之碗狀體，其包括底端與燈帽12連接之一管形 接部140和與該連接部14〇連接之一第一碗壁⑷。 该碗壁142之口徑由下向上逐漸增大，而形成一向 上開口之碗狀蓋體，該第-碗壁142在開口處之内 壁周緣均勻開設三安裝孔142〇，用於供螺桿件（圖 未示）穿過與第二蓋體16螺合。該第二蓋體16為 由塑夥或金屬材料製成之倒置碗狀體，其包括一 環形結合部160和與該結合部16〇連接之一第二碗 壁162。該結合部160之直徑略小於該連接部14〇 之直徑’其内設置有内螺紋1600，以與散熱器 底部螺合連接，該結合處160之管壁上均勻開設有 三透孔1602。該第二碗壁162與該結合部16〇連接 之上半部分之口徑由上向下逐漸增大，該第二碗壁 162之上半部分均勻開設有與發光二極體模組3〇對 應之複數穿孔164，該等穿孔164大致自下向上穿 透該碗壁162以供連接發光二極體模組3〇之電源線 組（圖未示）穿過；該第二碗壁162下半部分為口 徑均勻之環狀體’其開口大小與第一蓋體14之開口 相適配’該環狀體均勻開設有複數通氣孔166以供 氣 >瓜進入苐一、一盖體14、16形成之空間内，且該 1321630 第二碗壁162在開口之内壁周緣距均設置有三螺孔 (圖未示）’該等螺孔分別與第一蓋體14之安裝孔 蓋體14、16結合在一起。該第 1420對應以與穿過該安裝孔142〇之螺桿件配合將 二蓋 言亥第 一 -—-ii- Ϊ3Α ^ ^ ^ # 1 ' '义-成矛一、一蓋 體14、16結合在一起形成之空間可容置該發光二極 體燈具之電子整流器（圖未示）。 極體燈具内設置有-方向感測器(圖未二St[Technical Field] The present invention relates to a light-emitting diode lamp, and more particularly to a light-emitting diode lamp having a heat dissipation structure. [Prior Art] As a new generation of light source, the light-emitting diode light source can not replace the traditional incandescent lamp on a large scale. However, it has the advantages of long working life, energy saving and environmental protection, and is generally favored by the market. . Moreover, the module composed of the light-emitting diode can generate a high-power, high-brightness light source, which can completely replace the existing incandescent lamp for indoor and outdoor illumination, and will also replace the existing light source such as the traditional incandescent lamp widely and revolutionarily. And become the main light source in line with the theme of energy conservation and environmental protection. However, the greater the power and brightness, the greater the heat generated by the LED or its module, and it is difficult to dissipate in a relatively small volume of a light-emitting diode lamp. Therefore, the light-emitting diode still has a large heat-dissipation technology bottleneck, which is also the most difficult point for the current marketization of high-power, high-brightness light-emitting diode lamps. The current common heat dissipation solution in the industry is to provide a heat sink in the luminaire to dissipate heat into the surrounding air by contacting the surface of the heat sink with natural convective air. Therefore, in order to meet the heat dissipation requirements of high-power, high-brightness LED light to make it work properly to prevent light decay, it is necessary to provide a heat sink with a large heat dissipation area. This usually leads to the dissipation of 1321630. The heat exchanger is large in the luminaire, and the overall luminaire is also bulky, making the luminaire structure bulky and difficult to promote in indoor lighting. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a heat dissipating device having better heat dissipation performance in a light-emitting diode lamp. A light-emitting diode lamp having a heat dissipation structure, comprising: a lamp holder, a heat sink connected to the lamp holder, and a plurality of light-emitting diode modules thermally connected to the heat sink, the heat sink including a hollow tube One end of the barrel communicates with the surrounding air, and the other end of the barrel communicates with the lamp holder. The lamp holder is provided with a plurality of vent holes communicating with the surrounding air. The airflow passage formed in the radiator cylinder of the light-emitting diode lamp and the lamp holder can effectively enhance the airflow and φ increase the contact area between the heat sink and the airflow, thereby realizing in a limited volume. The good heat dissipation of the lamps further solves the heat dissipation problem of the high-power light-emitting diode lamps. [Embodiment] FIG. 1-2 shows a first embodiment of a light-emitting diode lamp having a heat dissipation structure according to the present invention, and includes a net tiger/, a lamp holder, and a heat sink H connected to the lamp holder 10. 20. A plurality of light emitting diode modules 3A mounted on the surface of the heat sink 2Q and an airflow generating device 40 (shown in FIG. 4) mounted in the socket 1b. 4 The upper lamp holder 10 includes a lamp cap 12, a first cover body 14 connected to the lamp cap 12, and a first cover body 16 opposite to the first cover body 14. The lamp cap 12 is a standard screw Α Α 并 并 并 并 并 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The first helmet, the body 14 is a bowl made of plastic material, and includes a tubular connecting portion 140 connected to the lamp cap 12 at the bottom end and one of the connecting portions 14 First bowl wall (4). The diameter of the bowl wall 142 is gradually increased from the bottom to the top to form an upwardly opening bowl-shaped cover. The first bowl wall 142 is evenly provided with three mounting holes 142 周 at the periphery of the inner wall of the opening for the screw member ( The figure is not shown) threaded through the second cover 16 . The second cover 16 is an inverted bowl made of a plastic or metal material and includes an annular joint 160 and a second bowl wall 162 joined to the joint 16B. The joint portion 160 has a diameter slightly smaller than the diameter of the connecting portion 14', and is internally provided with an internal thread 1600 for screwing connection with the bottom of the heat sink. The through hole of the joint portion 160 is uniformly provided with three through holes 1602. The diameter of the upper portion of the second bowl wall 162 and the joint portion 16 is gradually increased from the top to the bottom, and the upper portion of the second bowl wall 162 is evenly opened corresponding to the LED module 3 a plurality of through holes 164, the through holes 164 penetrating from the bottom to the bottom of the bowl wall 162 for connecting the power cord set (not shown) of the LED module 3; the second half of the second bowl wall 162 The annular body having a uniform diameter is partially adapted to the opening of the first cover body 14. The annular body is uniformly provided with a plurality of vent holes 166 for supplying gas, and the melon enters the first cover and the cover body 14. In the space formed by the 161616, the second bowl wall 162 is provided with three screw holes (not shown) at the periphery of the inner wall of the opening. The screw holes are respectively connected with the mounting holes 14 and 16 of the first cover 14. integrate. The 1420 is adapted to cooperate with the screw member passing through the mounting hole 142 to combine the first cover----ii- Ϊ3Α ^ ^ ^ # 1 ' '----------------------- The space formed together can accommodate the electronic rectifier (not shown) of the LED lamp. A directional sensor is provided inside the polar body luminaire (Figure 2
安裝在該燈座1G内，亦可以係在該散熱器 …之同體22内。因為空氣受熱會向上移動，一般 ;:二：對流之方向係向上之，所以該方向感測器 用：偵測該發光二極體燈具之擺放方向以控制 一產生裝置40產生方向向上之強制氣流。 如圖3所示，上述散熱器2〇由導熱性能 材料如叙、銅等全眉 、 有#屬材科一體形成。該散熱器20具 狀筒體22’該筒體22内壁沿該筒體22之 關於兮C數條形内籍片24’該等内鰭片24 片^之同厚Λ2中心轴線均句對稱地分佈，該等内鰭 截面二厚度自筒體内壁開始向内逐漸遞減，故其橫 呈銳角三角形但頂角尖端被 •體22外壁沿其徑向向外延伸有::二狀^ 該等導埶劈w Ba 、呷喇禝数導熱臂20， 分佈，”導中心轴線均句對稱地 30之數量 ^ 之數里對應發光二極體模組 在本實施例Φ泛不同實施例令可為不同之數量，而 1中為對應六發光二極體模組3〇之六導 6 …煮26。該等導熱臂26之延長線將相交於該筒體 22之中心軸線，該導熱臂26向兩側垂直延伸有複 數對外鰭>} 260’每-對外鰭片編均關於對應之 導熱臂26對稱，线科籍片編之長度由裏向外 逐漸遞增。每—導熱臂26之末端均與最外端之外歸 2 26〇内側表面連接，所以每—導熱f 26最外側之 一對外鰭片26G之外侧表面均為—平滑平面。該筒 體22★底端向下延設一螺合筒28，該螺合筒28設置 有”第一蓋體16結合部160之内螺紋1600相適配 j外螺紋（未標號），該螺合筒28之筒體上均勻開 设有與結合部160之透孔16〇2對應之三螺孔28〇。 在該散熱器20螺合筒28與第二蓋體16之結合部 丄6〇螺合元成時，該等結合部16〇之透孔16〇2與該 等螺孔280對應並供螺釘（圖未示）穿過而與該等 螺孔280螺合，從而進一步鎖固散熱器2〇與該第二 蓋體16。在其他實施例中，可以不設置該散熱器2〇 螺合筒28之外螺紋及結合部16〇之内螺紋，該散熱 益20與該第二蓋體16之連接可以係通過螺釘穿過 該結合部160之透孔1602與螺合筒28之螺孔280 螺合來實現。此外，為了該筒體22具有較理想之煙 自效應，以利於筒體22内之氣流流通，該筒體22 之長度與直徑之比例即係長徑比選取為十比一以上 或五比一以上，在本實施例中該筒體22之長徑比優 選為十比一’ 一般來說長徑比太低，其效果不佳能 達到十比一以上較佳。 請一併參閱圖2，該發光二極體模組30包括一 矩形電路板32，該電路板32之形狀大小略小於散 熱為20最外側之外鰭片26〇，其上並排安裝有複數 個發光二極體元件34。 如圖4所示，上述氣流產生裝置40安裝於該燈 座ίο内，其位於該第二蓋體16之第二碗壁162與 、、’° 5部160之連接處，該氣流產生裝置4〇正對該散 熱器20筒體22與該結合部16〇内連通之通道，以 便其產生之氣流直接從該通道内通過。該氣流產生 裝置40可以係超聲波風扇、壓電動力風冷等氣冷裝 置，在本實施例中該氣流產生裝置為馬達驅動之風 扇。 上述發光二極體燈具在組裝時，該氣流產生裝 置4〇通過螺釘或魅貼等方式固定于該第二蓋體16 之第一碗壁162與結合部16〇之連接處再用螺桿 件牙過第-蓋體14之安裝孔i與第二蓋體16之 螺孔螺合’而將第_、二蓋體14、16結合在一起。 該散熱器2G底端之螺合筒28與第二蓋體16上結合 P 160螺°連接。該等發光二極體模組30分別貼置 在該編20¾外側之外韓片遍之外侧面上，且 發光二極體模組3〇與對應外鰭片26〇之間可填充如 導熱膠之類之導熱介質’以增加它們間之導熱能 1321630 力0 上述發光二極體燈具在使用時’為了使其内之 空氣在該散熱器20筒體22之煙囪效應下而受熱由 下向上對流’應該筒體22大致豎直擺放。該發光二 極體模組30將熱量傳導到與其接觸之散熱器2〇之 外鑛片260上，再通過導熱臂26將熱量均勻分佈到 散熱器20導熱筒體22及其内之内鰭片24上。該筒 體22外壁、該導熱臂26和該外鰭片26〇直接與周 圍之空氣接觸將熱量散發到周圍之空氣中去。該筒 體22内與該第一、二蓋體14、16形成之空間連通 並形成一氣流通路，亦就係氣流在該氣流產生裝置 40之驅動下’從該第二蓋體16之通氣孔166進入， 再經筒體22内壁受熱，最後從筒體22頂端出口流 出’或者在該發光二極體燈具與圖1所示之相反位 置放置時，空氣從筒體22底端進入，再經筒體22 内壁熱交換受熱，最後從該第二蓋體16之通氣孔 166出口流出。安裝在該燈座1〇内之氣流產生裝置 4〇順著該散熱器20筒體22内之自然氣流方向產生 強制氣流’極大地促進了該散熱器2〇内外之氣流迴 圈’從而快速將該散熱器2〇之内外鰭片24、260上 之熱量散發到氣流中去並被帶走，進而達到高效散 熱之目之。 如圖5所示’本發明第二實施例中具有散熱結 9 構之發光二極體燈具，與第一實施例相比，該發光 二極體燈具之氣流產生裝置50安裝在該散熱器20 之頂部，完全覆蓋該散熱器20筒體22之頂部。該 氣流產生裝置50具有與該散熱器2〇頂部相匹配之 圓形扇框（未標號），該扇框可通過上螺釘或粘貼等 方式固定在該散熱器20之頂部，從而使其產生之氣 流主要在該散熱器20之筒體22内流通，有小部分 氣流經過散熱器20之外鰭片26〇，對該等外鰭片 及安裝其上之發光二極體模組3〇進行附帶散熱。 在其他實施例中，上述發光二極體燈具亦可以 不设置任何氣流產生裝置，只需在發光二極體燈具 使用時’使其散熱器2〇大致豎直擺放，該發光二極 體燈具内之空氣將在該散熱器2〇筒體22之煙自效 心:由下向上對流而將發光二極體模組30產生之 熱量散發到周圍環境中。 、练上所述，本發明確已符合發明專利之要件， 遂依法提出專财請。惟，以上所述者僅為本發明 ^佳實^方式’自不能以此限制本案之中請專利 ^。舉凡熟悉本案技藝之人士援依本發明之精神 =之等效修飾或變化’皆應涵蓋於以下 圍内。 j 【圖式簡單說明】 圖1係本發明具有散熱結構之發光二極體燈具 1321630 之第一實施例之立體組合圖。 圖2係圖1中具有散熱結構之發光二極體燈具 之立體分解圖。 圖3係圖2中散熱器之立體圖。 圖4係圖1中沿剖線IV-IV之剖示圖。 圖5係本發明具有散熱結構之發光二極體燈具 之第二實施例之立體組合圖。 【主要元件符號說明】 燈座 10 第一蓋體 14 第一碗壁 142 第二蓋體 16 内螺紋 1600 第二碗壁 162 通氣孔 164 筒體 22 導熱臂 26 螺合筒 28 發光二極體模組 30 發光二極體元件 34 燈帽 12 π 1321630 連接部 140 安裝孔 1420 結合部 160 透孔 1602 穿孔 164 散熱器 20 内鰭片 24 外鰭片 260 螺孔 280 電路板 32 氣流產生裝置 40、50It is installed in the lamp holder 1G, and can also be attached to the same body 22 of the heat sink. Because the air is heated upwards, generally; 2: the direction of the convection is upward, so the direction sensor is used to: detect the direction in which the LEDs are placed to control the direction in which the generating device 40 generates the upward direction. . As shown in Fig. 3, the above-mentioned heat sink 2 is integrally formed of a thermal conductive material such as a full eyebrow such as Syrian or copper, and a material belonging to the genus. The heat sink 20 has a tubular body 22'. The inner wall of the tubular body 22 is along the cylindrical body 22, and the inner fins 24' of the inner fins 24' are internally symmetric. In the ground distribution, the thickness of the inner fin section gradually decreases inward from the inner wall of the cylinder, so that the transverse angle is triangular, but the tip end of the apex angle is extended radially outward by the outer wall of the body 22: Guide 埶劈 w Ba, 呷 禝 导热 导热 导热 导热 导热 导热 , , 导热 导热 导热 导热 导热 导热 导热 导热 导热 导热 导热 导热 导热 导热 导热 导热 导热 导热 导热 导热 Ba Ba Ba Ba Ba Ba Ba Ba Ba Ba Ba Ba Ba Ba Ba For a different quantity, and 1 is a six-conductor 6 of the corresponding six-emitting diode module 3, the extension line of the heat-conducting arms 26 will intersect the central axis of the cylinder 22, the heat-conducting arm 26 Vertically extending to both sides, a plurality of outer fins> 260' each of the outer fins are symmetric about the corresponding heat conducting arm 26, and the length of the line art piece is gradually increased from the inside to the outside. Each end of the heat conducting arm 26 Both are connected to the outer surface of the outermost end of the outer surface of the external fin 26G. The surface is a smooth plane. The bottom of the cylinder 22 is extended downwardly with a screwing cylinder 28, and the screwing cylinder 28 is provided with "the internal thread 1600 of the first cover 16 joint portion 160 is adapted to the external thread of the j. (Unlabeled), the cylindrical body of the screwing cylinder 28 is evenly provided with a three screw hole 28〇 corresponding to the through hole 16〇2 of the joint portion 160. When the coupling portion 螺6 of the heat sink 20 and the second cover 16 is screwed, the through holes 16 〇 2 of the joint portions 16 与 correspond to the screw holes 280 and are provided with screws ( The figure is not shown) and is screwed into the screw holes 280 to further lock the heat sink 2 and the second cover 16. In other embodiments, the external thread of the heat sink 2 〇 screwing barrel 28 and the internal thread of the joint portion 16 可以 may not be provided, and the connection between the heat dissipation 20 and the second cover 16 may pass through the screw. The through hole 1602 of the joint portion 160 is screwed with the screw hole 280 of the screwing cylinder 28. In addition, in order to facilitate the airflow of the cylinder 22 to facilitate the airflow in the cylinder 22, the ratio of the length to the diameter of the cylinder 22, that is, the aspect ratio is selected to be more than ten to one or five to one. In the present embodiment, the aspect ratio of the cylinder 22 is preferably ten to one. Generally, the aspect ratio is too low, and the effect is not good, and it is preferably more than ten to one. Referring to FIG. 2 together, the LED module 30 includes a rectangular circuit board 32. The shape of the circuit board 32 is slightly smaller than the outermost fins 26 of the heat dissipation surface 20, and a plurality of them are mounted side by side. Light-emitting diode element 34. As shown in FIG. 4, the airflow generating device 40 is installed in the socket ω, which is located at the junction of the second bowl wall 162 of the second cover 16 and the '° 5 portion 160. The airflow generating device 4 The channel in which the tube 20 of the heat sink 20 communicates with the inside of the joint portion 16 is being passed so that the airflow generated therefrom passes directly through the passage. The airflow generating device 40 may be an air cooling device such as an ultrasonic fan or a piezoelectric power air-cooling device. In the present embodiment, the airflow generating device is a motor-driven fan. When the LED device is assembled, the airflow generating device 4 is fixed to the joint of the first bowl wall 162 and the joint portion 16 of the second cover 16 by screws or charms, and then the screw teeth are used. The first and second covers 14, 16 are joined together by the mounting hole i of the first cover 14 and the screw hole of the second cover 16. The screwing cylinder 28 at the bottom end of the heat sink 2G is connected to the second cover 16 by a coupling P 160 . The light-emitting diode modules 30 are respectively placed on the outer side of the outer side of the outer layer of the 205⁄4, and the light-emitting diode module 3 〇 and the corresponding outer fin 26 可 can be filled with a thermal adhesive. Such as the heat-conducting medium 'to increase the thermal conductivity between them 1321630 force 0 The above-mentioned light-emitting diode lamp is used in the 'in order to heat the inside of the radiator 20 under the chimney effect of the radiator 20 from the bottom to the upper convection 'The barrel 22 should be placed substantially vertically. The light-emitting diode module 30 conducts heat to the outer piece 260 of the heat sink 2 that is in contact therewith, and then distributes heat evenly through the heat conducting arm 26 to the heat-conducting barrel 22 of the heat sink 20 and the inner fins thereof. 24 on. The outer wall of the barrel 22, the heat conducting arm 26 and the outer fin 26 are directly in contact with the surrounding air to dissipate heat to the surrounding air. The inside of the cylinder 22 communicates with the space formed by the first and second covers 14, 16 to form an air flow path, and the air flow is driven by the air flow generating device 40 to 'from the vent hole of the second cover 16 166 enters, and then passes through the inner wall of the cylinder 22 to be heated, and finally flows out from the top end outlet of the cylinder 22' or when the light-emitting diode lamp is placed opposite to the position shown in FIG. 1, the air enters from the bottom end of the cylinder 22, and then passes through The heat exchange on the inner wall of the cylinder 22 is heated, and finally flows out from the outlet of the vent hole 166 of the second cover 16. The airflow generating device 4 installed in the socket 1 generates a forced airflow along the direction of the natural airflow in the casing 22 of the radiator 20, which greatly promotes the airflow loop inside and outside the radiator 2, thereby rapidly The heat on the inner and outer fins 24, 260 of the heat sink 2 is radiated into the airflow and taken away, thereby achieving efficient heat dissipation. As shown in FIG. 5, in a second embodiment of the present invention, a light-emitting diode lamp having a heat-dissipating junction structure is mounted on the heat sink 20 in comparison with the first embodiment. At the top, it completely covers the top of the barrel 22 of the heat sink 20. The airflow generating device 50 has a circular fan frame (not labeled) matching the top of the heat sink 2, and the fan frame can be fixed on the top of the heat sink 20 by screwing or pasting, thereby causing it to be generated. The airflow mainly flows through the cylinder 22 of the heat sink 20, and a small portion of the airflow passes through the fins 26 of the heat sink 20, and the outer fins and the light-emitting diode modules mounted thereon are attached. Cooling. In other embodiments, the above-mentioned light-emitting diode lamp may not be provided with any airflow generating device, and only needs to be placed vertically in the light-emitting diode lamp when the light-emitting diode lamp is used. The air inside will self-activate the smoke of the radiator 2 of the radiator 2: the heat generated by the LED module 30 is radiated into the surrounding environment by convection from the bottom to the top. As stated in the training, the present invention has indeed met the requirements of the invention patent, and the special fund is requested according to law. However, the above-mentioned ones are only the invention. The best way to do this is to limit the patents in this case. Anyone who is familiar with the skill of the present invention will be able to cover the following aspects within the spirit of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective assembled view of a first embodiment of a light-emitting diode lamp 1321630 having a heat dissipation structure according to the present invention. 2 is an exploded perspective view of the light-emitting diode lamp having the heat dissipation structure of FIG. 1. Figure 3 is a perspective view of the heat sink of Figure 2. Figure 4 is a cross-sectional view taken along line IV-IV of Figure 1. Figure 5 is a perspective assembled view of a second embodiment of a light-emitting diode lamp having a heat dissipation structure of the present invention. [Main component symbol description] Lamp holder 10 First cover body 14 First bowl wall 142 Second cover body 16 Internal thread 1600 Second bowl wall 162 Vent hole 164 Tube 22 Heat transfer arm 26 Screw barrel 28 Light-emitting diode mold Group 30 Light-emitting diode element 34 Lamp cap 12 π 1321630 Connection part 140 Mounting hole 1420 Joint part 160 Through hole 1602 Perforation 164 Heat sink 20 Inner fin 24 External fin 260 Screw hole 280 Circuit board 32 Airflow generating device 40, 50
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