M291029 八、新型說明： 【新型所屬之技術領域】 本新型是有關於一種散熱風扇，特別是指一種可以將 電流輸送至轉動的扇輪上的散熱風扇。 【先前技術】 。如圖1所示，習知散熱風扇i包含一外殼u、一扇輪 單凡/2、一電路板13，及四發光二極體14。該外殼11具 有八又體U1、一固定座112、四連接該殼體nl與固定座 112的肋條113，及—設於該固定座112中央的支撐管114 。該扇輪單元12具有—輪轂121、七自該輪轂121外周面 向外延伸且呈透明的扇葉122，及一穿設於該外殼^之支 樓官114内的轉軸123。該四發光二極體14是分設於該電 路板13的外周緣並與該電路板13電連接。當該散熱風扇i 之電路板13輸出電流時，可使該四發光二極體14產生光 線，並可從上述呈透明狀的扇葉122透射出來，來增加該 散熱風扇1的炫麗視感。 從上述況明可知，該散熱風扇丨的四發光二極體14是 相間隔地設置在該電路板13的外周緣上，當然，也有些設 計是設置在該外殼U之四肋條113上（此狀況圖未示），或 是該外殼11之殼體⑴上（此狀況圖未示）。然而，無論那 :種設計，該四發光二極體14所產生的光線都會被該扇輪 單元12的扇葉122所遮擋，因此，所述扇葉122大都會設 計成呈透明狀態，讓大部分的光線可以透射出來，即使如 此，仍存在有部分的光線會被反射回去，而使得整體的亮 M291029 度必然會減弱。 另一方面，由於該四發光二極體14是設置在固定的位 置上其所旎表現出的變化，僅有使用不同光色的發光二 極體14 ’在圖1所揭示的例子中，頂多不會超過四種顏色 的炎化，而且都只是在固定範圍發出光線，可以達到炫光 效果實在彳艮有限。 【新型内容】 因此，本新型之目的，即在提供一種散熱風扇，可以 將包机輸送至轉動的扇輪上，用以驅動如可發光的發光元 件專衣置使侍免度不會被遮播而減弱，同時，也可以讓 光線呈現出多樣性的變化，增加炫麗之美感。 於是’本新型之散熱風扇，包含一外殼、一可相對該 外设旋轉的扇輪單元、一控制單元、一軸承單元，及一導 電單元。 該外殼具有一固定座，及一設置在該固定座上之支撐 官。该扇輪單元包括一輪轂、複數分別自該輪轂外周面向 外延伸之扇葉、一穿設於該外殼之支樓管中並可相對該外 殼旋轉且可導電的轉轴、一貼設於該轉軸外周面上的絕緣 套管，及一貼設於該絕緣套管外周面上的導電套管，該輪 轂上形成有一可供該導電套管穿設的通孔。 該控制單元具有一套設於該外殼之支撐管上的第一控 制電路板，及一設置在該輪轂上並分別與該扇輪單元之轉 軸與導電套管電連接的第二控制電路板。該軸承單元具有 一 5又置於該外殼之支撐管中並貼設於該扇輪單元之轉轴上 M291029 且可導電白勺帛一軸承，及一與該第一車由承相間隔並貼設於 該扇輪單元之導電套管外周面上且可導電的第二軸承。 該導電單元具有一穿設於該外殼之支撐管上而可連接 该第一控制電路板與該第一軸承的第一導電片、一設於該 支撐官上並與該第一控制電路板電連接的第二導電片，及 一套接於該支撐管上並與第二導電片連接的導電環，該導 電環同時與該第二軸承連接。 自該第一控制電路板，經該第一導電片、第一軸承、 轉軸、而連接到該第二控制電路板，以形成一獨立的導電 通路，另外，自該第一控制電路板，經該第二導電片、導 電裱、第二軸承、導電套管，再連接到該第二控制電路板 ’形成另一導電通路，藉由上述的二導電通路而構成一 導電迴路，而使a亥第一控制電路板的電流傳導至該第二控 制電路板。 ' 由於位於該扇輪單元之輪轂上的第二控制電路板能從 該第一控制電路板獲取電流，因此可將待驅動之電子元件（ 例如發光兀件.…等)設於該輪轂或是扇葉上，再將該待驅動 之電子兀件與該二導電通路電連接，可使該待驅動之電子 元件被通電而作動，例如該待驅動之電子元件若是使用發 光兀件’則其發出的光線並不會被所述之扇冑所遮擋，而 能維持原有的亮度，同日夺，亦可利用該扇輪單元的轉動， 再配合該第二控制電路板操控所述之發光元件，令發光元 件可以呈現出多樣性的變D增加炫麗光彩之美感。 【實施方式】 M291029 有關本新型之前述及其他技術内容、特點與功效，在 以下配合參考圖式之二個較佳實施例的詳細說明中，將可 清楚的呈現。在本新型被詳細描述之前，要注意的是，在 以下的說明中，類似的元件是以相同的編號來表示。 如圖2、3所示，本新型散熱風扇之一第一較佳實施例 ，包含一外殼2、一可相對該外殼2旋轉的扇輪單元3、一 控制單元4、一用以支撐該扇輪單元3轉動的軸承單元5、 一導電單元6，及一油封環7。 違外设2具有一固定座21，及一設置在該固定座21上 且呈中空之支撐管22。 该扇輪單元3包括一中空的輪轂31、複數分別自該輪 皸31外周面向外延伸之扇葉32、一穿設於該外殼2之支撐 g 22中並可相對該外殼2旋轉且可導電的轉軸、一貼設 於該轉軸33外周面上的絕緣套管34、一貼設於該絕緣套管 34外周面上的導電套管35、一封蓋％，及一環扣在該轉軸 33近底端處的扣抵環37。該輪轂31的頂部形成有一凹槽 311及與该凹槽311連通並可供該導電套管35穿設的通 孔312。忒轉軸33、絕緣套管34與導電套管35是連同該 輪轂31 —起轉動。該封蓋36是蓋合於該輪轂31之凹槽 3 11 ' 上。在該第一較佳實施例中，該轉軸33與導電套管35 疋為金屬材質製成，以達到導電之需求。 該控制單元4具有一設置在該外殼2之支撐管22上的 第控制電路板41，及一位於該輪轂31之凹槽311内並分 別與该扇輪單元3之轉軸33與導電套管35電連接的第二 M291029 控制電路板42。§亥扇輪單元3之封蓋3 6可用於保護該第二 控制電路板42與防止灰塵落入。在該第一較佳實施例中， 5亥第二控制電路板42是設置在該凹槽311内，但也可以設 置在該輪轂31上，不應以此侷限本新型之申請專利範圍。 該軸承單元5具有一設置於該外殼2之支撐管22中並 貼設於該扇輪單元3之轉軸33上且可導電的第_轴承51， 及—與該第—軸承51相間隔並貼設於該扇輪單元3之導電 套管35外周面上且可導電的第二軸承52。在該第一較 一軸承51、52並不會與該扇輪單元 動，該第 動0 施例中，該第一、二軸承51、52均為銅金屬材質製成的含 油軸承’所謂含油軸承，是以銅粉粒燒結而成並形成有微 :之孔隙的環狀體，再浸泡在油液中，使油液可充滿孔隙 ’可於滾動接觸中達_滑之效果。設計上，該轉轴％ 與導電套管35是在該第一、二軸承5卜52的内周面上轉 起串 該導電單元6具有一穿設於該外殼2之支撐管心 可連接該第-控制電路板41與該第―軸承5i的第一導喝 、ΓΛ㈣支撐f 22上並與該第—㈣電路板w 1 一亥第一導電片61相間隔的第二導電片62，及查 接於該支撐管22卜等冤片62,及一垄 产 _ 、〜…弟一導電片62抵觸連接的導霜 :面’：弟：轴承52的外周面是貼設於該導電環《的内 :導電環63相隔開，因此該導電…二 電片有所接觸，以阻絕該第—導電片η與該導電 M291029 環63電導通。該 電連接，該導片62因頂觸該導電環63而與之 。 …63可供該第二軸承52丧入承坐而固定 該油封環7 Η #六 封設於該扇輪單元3之導電套管35上並 是含油軸承，為確頂部。由於該第-、二軸承51、52 切保其_性，必須能阻止油液慢慢渗漏 該扇= = = 乍法是利賴外殼2之支撐管22與 之功能，而> —_衣37包圍§亥第一軸承51，達到防漏 電環63與該油:/7 =的作法是利用該導電單元6之導 功能。 、衣’來包圍該第二軸承52，達到防漏之 構筚出-:2 W用上述元件設置位置的相互搭配，而可以 =:的導電通路以構成-導電迴路，其中之-導 電自:控制單元4之第-控制電路…接到該導 轴=:I導電“1，接著，該第-導電“"_ 平田不旱凡5之兔一 ; c 1 觸該扇輪單元3之轉軸33 ^亥弟車由承Η的内周面是碰 4之第一㈣之轉轴33，績而該轉軸33再與該控制單元 之弟一控制電路板42電連接。 電輩另:導料路則是自該第-控制電路經由該導 士 . 70之弟—導電片62傳導到該導電環63，接著’該導 電裱63抵觸該第二軸承52 " 附於該扇輪單元3之導電套管二=二的内周面是貼 一』 命电砮吕35,该導電套管35再盥該箆 :第空制42電連接。藉由此二導電通路的形成，使得 弟—控制電路板41的電流可傳導至位於該扇輪單元3上 10 M291029 的第二控制電路板42。 虽該扇輪單元3之扇葉32上設置有—或—個以上如發 極體之類的發光元件9(圖3中供顯示-個)時，立所需 =源可直接從該第二控制電路板42提供，即可讓該發光 ^ 9產生光亮。由於該發光元件9是位於所述扇葉^的M291029 VIII. New Description: [New Technical Field] The present invention relates to a cooling fan, and more particularly to a cooling fan that can deliver current to a rotating fan wheel. [Prior Art]. As shown in FIG. 1, the conventional cooling fan i includes a casing u, a fan wheel /2, a circuit board 13, and four light-emitting diodes 14. The housing 11 has an octagonal U1, a fixing base 112, four ribs 113 connecting the housing n1 and the fixing base 112, and a supporting tube 114 disposed at the center of the fixing base 112. The fan wheel unit 12 has a hub 121, seven blades 122 extending outward from the outer peripheral surface of the hub 121 and being transparent, and a rotating shaft 123 extending through the support member 114 of the casing. The four LEDs 14 are disposed on the outer periphery of the circuit board 13 and are electrically connected to the circuit board 13. When the circuit board 13 of the heat dissipation fan i outputs a current, the four light-emitting diodes 14 can be made to emit light and can be transmitted from the transparent blade 122 to increase the brightness of the heat-dissipating fan 1. It can be seen from the above that the four light-emitting diodes 14 of the heat dissipation fan are disposed on the outer circumference of the circuit board 13 at intervals. Of course, some designs are disposed on the four ribs 113 of the outer casing U (this The condition diagram is not shown, or on the casing (1) of the casing 11 (this condition is not shown). However, regardless of the design, the light generated by the four light-emitting diodes 14 is blocked by the fan blades 122 of the fan wheel unit 12. Therefore, the blades 122 are generally designed to be transparent and large. Part of the light can be transmitted. Even so, some of the light will be reflected back, so that the overall brightness of M291029 will inevitably weaken. On the other hand, since the four-light-emitting diode 14 is changed in a fixed position, only the light-emitting diodes 14' using different light colors are used in the example disclosed in FIG. It will not exceed the inflammation of the four colors, and it will only emit light in a fixed range, and the glare effect can be achieved. [New content] Therefore, the purpose of the present invention is to provide a heat dissipating fan that can transport the charter to a rotating fan wheel for driving a illuminating component such as a illuminating device so that the accommodating degree is not blocked. The weakening, at the same time, can also make the light show a variety of changes, increasing the beauty of dazzling. Thus, the heat radiating fan of the present invention comprises a casing, a fan wheel unit rotatable relative to the peripheral, a control unit, a bearing unit, and a conducting unit. The housing has a mounting base and a support member disposed on the mounting base. The fan wheel unit includes a hub, a plurality of blades extending outward from the outer circumferential surface of the hub, a rotating shaft that is inserted into the branch pipe of the outer casing and rotatable relative to the outer casing, and is attached to the rotating shaft An insulating sleeve on the outer peripheral surface of the rotating shaft, and a conductive sleeve attached to the outer peripheral surface of the insulating sleeve, and a through hole through which the conductive sleeve is formed is formed on the hub. The control unit has a first control circuit board disposed on the support tube of the outer casing, and a second control circuit board disposed on the hub and electrically connected to the rotating shaft of the fan wheel unit and the conductive sleeve, respectively. The bearing unit has a 5 and is placed in the support tube of the outer casing and is attached to the rotating shaft of the fan wheel unit M291029 and can be electrically conductive, and a bearing is spaced apart from the first vehicle. a second bearing that is disposed on the outer peripheral surface of the conductive sleeve of the fan wheel unit and is electrically conductive. The conductive unit has a first conductive piece that is connected to the support tube of the outer casing to connect the first control circuit board and the first bearing, and is disposed on the support member and electrically connected to the first control circuit board. a second conductive piece connected, and a set of conductive rings connected to the support tube and connected to the second conductive piece, the conductive ring being simultaneously connected to the second bearing. The first control circuit board is connected to the second control circuit board via the first conductive sheet, the first bearing, and the rotating shaft to form a separate conductive path, and further, from the first control circuit board, The second conductive sheet, the conductive raft, the second bearing, and the conductive sleeve are connected to the second control circuit board to form another conductive path, and the conductive path is formed by the two conductive paths, and Current from the first control circuit board is conducted to the second control circuit board. ' Since the second control circuit board located on the hub of the fan wheel unit can draw current from the first control circuit board, the electronic component to be driven (for example, a light-emitting element, etc.) can be placed on the hub or And electrically connecting the electronic component to be driven to the two conductive paths, so that the electronic component to be driven is activated by being energized, for example, if the electronic component to be driven uses the light-emitting component, The light is not blocked by the fan, but the original brightness can be maintained, and the rotation of the fan unit can be utilized, and the second control circuit board is used to control the light-emitting component. The illuminating element can exhibit a variety of changes D to increase the beauty of dazzling brilliance. [Embodiment] The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments. Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals. As shown in FIG. 2 and FIG. 3, a first preferred embodiment of the present invention includes a housing 2, a fan unit 3 rotatable relative to the housing 2, a control unit 4, and a fan unit. The bearing unit 5, which rotates the wheel unit 3, a conductive unit 6, and an oil seal ring 7. The contraband 2 has a fixing base 21 and a hollow support tube 22 which is disposed on the fixing base 21. The fan wheel unit 3 includes a hollow hub 31, a plurality of blades 32 extending outwardly from the outer circumferential surface of the rim 31, a support g 22 extending through the outer casing 2, and rotatable relative to the outer casing 2 and electrically conductive a rotating sleeve 34, an insulating sleeve 34 attached to the outer peripheral surface of the rotating shaft 33, a conductive sleeve 35 attached to the outer peripheral surface of the insulating sleeve 34, a cover cover%, and a buckle on the rotating shaft 33 The buckle at the bottom end is abutted against the ring 37. The top of the hub 31 is formed with a recess 311 and a through hole 312 communicating with the recess 311 for the conductive sleeve 35 to pass through. The boring shaft 33, the insulating sleeve 34 and the conductive sleeve 35 are rotated together with the hub 31. The cover 36 is attached to the recess 3 11 ' of the hub 31. In the first preferred embodiment, the rotating shaft 33 and the conductive sleeve 35 are made of a metal material to meet the requirements of electrical conduction. The control unit 4 has a first control circuit board 41 disposed on the support tube 22 of the outer casing 2, and a shaft 311 located in the hub 31 and respectively coupled to the shaft 33 and the conductive sleeve 35 of the fan unit 3. The second M291029 is electrically connected to the control circuit board 42. § The cover 3 6 of the marine fan unit 3 can be used to protect the second control circuit board 42 from dust. In the first preferred embodiment, the second control circuit board 42 is disposed in the recess 311, but may be disposed on the hub 31, and should not be limited to the scope of the present invention. The bearing unit 5 has a first bearing 51 disposed in the support tube 22 of the outer casing 2 and attached to the rotating shaft 33 of the fan unit 3, and is electrically spaced from the first bearing 51. A second bearing 52 is provided on the outer peripheral surface of the conductive sleeve 35 of the fan wheel unit 3 and is electrically conductive. The first one bearing 51, 52 does not move with the fan wheel unit. In the first embodiment, the first and second bearings 51 and 52 are oil-impregnated bearings made of copper metal material. The bearing is an annular body sintered with copper powder and formed with micro: pores, and then immersed in the oil, so that the oil can fill the pores, which can achieve the effect of sliding in rolling contact. In the design, the rotating shaft % and the conductive sleeve 35 are turned on the inner peripheral surface of the first and second bearings 5 52. The conductive unit 6 has a support tube extending through the outer casing 2 to be connected. a second conductive sheet 62 of the first control circuit board 41 and the first conductive portion of the first bearing 5i, the fourth (four) support f 22 and spaced apart from the first (four) circuit board w 1 a first conductive sheet 61, and Checking the support tube 22 and the cymbal 62, and a ridge, _, ~... a conductive sheet 62 against the connected frost: surface ': brother: the outer peripheral surface of the bearing 52 is attached to the conductive ring The conductive rings 63 are spaced apart, so that the conductive sheets are in contact with each other to prevent the first conductive sheet η from being electrically connected to the conductive M291029 ring 63. In the electrical connection, the guide piece 62 is contacted by the conductive ring 63. The 63 can be used for the second bearing 52 to be seated and fixed. The oil seal ring 7 Η #6 is sealed on the conductive sleeve 35 of the fan wheel unit 3 and is an oil-impregnated bearing. Since the first and second bearings 51, 52 are insured, it is necessary to prevent the oil from slowly leaking the fan == = The method is to support the support tube 22 of the outer casing 2, and >_ The garment 37 surrounds the first bearing 51 of the hai, and the leakage preventing ring 63 and the oil: /7 = are used to utilize the guiding function of the conductive unit 6. , the clothing 'to surround the second bearing 52, to achieve a leak-proof configuration - 2 W with the above-mentioned components set the position of the mutual match, and can = = conductive path to constitute - conductive loop, which - conduction from: The first control circuit of the control unit 4 is connected to the guide shaft =: I is electrically conductive "1, and then, the first - conductive ""_ Pingtian is not a rabbit 5; c 1 touches the shaft of the fan wheel unit 3 33 ^Hai's car from the inner peripheral surface of the bearing is the first (four) of the shaft 33 of the touch, and the shaft 33 is electrically connected to the control circuit board 42 of the control unit. The electric source is another: the guiding material is conducted from the first control circuit to the conductive ring 63 via the conductive film 62 of the guide. The conductive film 63 is in contact with the second bearing 52 " The inner circumferential surface of the conductive sleeve 2=2 of the fan wheel unit 3 is attached to the power supply 砮35, and the conductive sleeve 35 is further connected to the 箆: the first air system 42 is electrically connected. By the formation of the two conductive paths, the current of the control circuit board 41 can be conducted to the second control circuit board 42 located at 10 M291029 of the fan unit 3. Although the fan blade 32 of the fan wheel unit 3 is provided with - or more than one light-emitting element 9 such as an emitter body (for display one in FIG. 3), the required source = source can be directly from the second The control circuit board 42 provides for the illumination to be illuminated. Since the light-emitting element 9 is located in the fan blade
、-面’因此不會遮擋該發光元# 9所發出的光線，而得 二？持原有的亮度。當然’該發光元# 9亦可設置在該扇 :早兀3之輪殼31上。配合該扇輪單元3的轉動，以及該 弟二控制電路板42的操控，可以使整個散熱風扇呈現出多 樣性的變化，達到增加炫麗光彩之美感。 如圖5所示，本新型散熱風扇之第二較佳實施例，大 致上是該第—較佳實施例相同，纟中不同之處在於：該散 熱風扇之第-、二軸承51、52是使用滾珠軸承，由於無油 液洩漏的問題，因此將該油封環7(見圖3)更換成一穿套在 δ亥扇輪單元3之導電套管35上且位於該輪轂31與第二軸 承52之間的彈性元件8，該彈性元件8的功用是在於抵壓 該第二軸承52，以防止其移位。在該第二較佳實施例中， 該彈性元件8是壓縮彈簧。 歸納上述，本新型之散熱風扇，是可將該第一控制電 路板41的電流連通至位於該扇輪單元3上的第二控制電路 板42,其中之一導電通路是經過該第一導電片η、第一軸 承51、轉軸33，而與該第二控制電路板42電連接，另一 導電通路則是經過該第二導電片62、導電環63、第二軸承 52、導電套管35，而連接到該第二控制電路板42，藉由該 11 M291029 : 二獨立的導電通路以椹Λi千 扇輪單元3上的戈 迴路，而可啟動設置在該 發光元件9 、彳驅動之電子凡件，如本實施例所揭露的 掩π、 其所發出的光線並不會被任何的扇葉32所遮 二：以維持原有的亮度，同時，當該扇輪單元3轉動時 :：°亥第-控制電路板42操控該發光元件9的光亮 =m光凡件9呈現出多樣性的變化，達到增加炫 、形之吴感，故確實能達到本新型之目的。 # At 、所述者，僅為本新型之較佳實施例而已，當不 2以此限定本新型實施之範圍，即大凡依本新型中請專利 ★圍及新型况明内容所作之簡單的等效變化與修_，皆仍 屬本新型專利涵蓋之範圍内。 【圖式簡單說明】 圖1是習知散熱風扇之一立體分解圖； 圖2疋立體分解圖，說明本新型散熱風扇之第一較 佳實施例； # 圖3疋该第一較佳實施例之剖面側視圖； 圖4是圖3之局部放大圖；及 s疋本新型散熱風扇之第二較佳實施例之剖面側視 12 M291029 ： 【主要元件符號說明】 2… 外殼 4 ， *控制單元 21 固定座 41， <第一控制電路板 22… 支撐管 42， •第二控制電路板 3… 扇輪單元 5々 ，軸承單元 31 輪轂 51 * *第一軸承 31卜 凹槽 52 * •第二軸承 312 * 通孔 6 •導電單元 32… 扇葉 61 * •第一導電片 33… 轉軸 62 · •第二導電片 34… 絕緣套管 63 · •導電環 35… 導電套管 7 ， *油封環 36 . 封蓋 8 ， •彈性元件 37… 扣抵環 9 ， *發光元件The - face" therefore does not block the light emitted by the illuminator #9, but two? Hold the original brightness. Of course, the illuminating element #9 can also be disposed on the wheel housing 31 of the early 兀3. In conjunction with the rotation of the fan wheel unit 3 and the control of the second control circuit board 42, the entire cooling fan can exhibit a variety of variations, thereby increasing the beauty of the dazzling brilliance. As shown in FIG. 5, the second preferred embodiment of the novel heat dissipating fan is substantially the same as the first preferred embodiment. The difference is that the first and second bearings 51 and 52 of the cooling fan are With the ball bearing, the oil seal ring 7 (see FIG. 3) is replaced with a bushing sleeve 7 on the conductive bushing 35 of the delta-side fan wheel unit 3 and located at the hub 31 and the second bearing 52 due to the problem of no oil leakage. Between the elastic members 8, the function of the elastic members 8 is to press the second bearing 52 to prevent displacement thereof. In the second preferred embodiment, the resilient member 8 is a compression spring. In summary, the heat dissipation fan of the present invention can communicate the current of the first control circuit board 41 to the second control circuit board 42 located on the fan wheel unit 3, wherein one of the conductive paths passes through the first conductive sheet. The first bearing 51 and the rotating shaft 33 are electrically connected to the second control circuit board 42. The other conductive path passes through the second conductive sheet 62, the conductive ring 63, the second bearing 52, and the conductive sleeve 35. And connected to the second control circuit board 42, by the 11 M291029: two independent conductive paths to the earth circuit on the 扇i thousand fan wheel unit 3, and can be activated in the light-emitting element 9 The mask π, as disclosed in the embodiment, is not covered by any of the blades 32 to maintain the original brightness, and at the same time, when the fan unit 3 rotates::° The illumination control element board 42 controls the light of the light-emitting element 9 to change the diversity of the light-emitting element 9 to increase the sense of glare and shape, so that the purpose of the novel can be achieved. #At, the above is only a preferred embodiment of the present invention, and does not limit the scope of the present invention to the extent that it is simple, etc., which is based on the patent and the new content of the present invention. The effect changes and repairs are still within the scope of this new patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a conventional heat dissipation fan; FIG. 2 is an exploded perspective view showing a first preferred embodiment of the novel heat dissipation fan; FIG. 3 is a first preferred embodiment. Figure 4 is a partial enlarged view of Figure 3; and a cross-sectional side view of the second preferred embodiment of the novel cooling fan 12 M291029: [Main component symbol description] 2... Housing 4, * Control unit 21 fixing base 41, <first control circuit board 22... support tube 42, • second control circuit board 3... fan unit 5々, bearing unit 31 hub 51 * * first bearing 31 groove 52 * • Two bearings 312 * Through holes 6 • Conductive units 32... Fan blades 61 * • First conductive sheets 33... Rotary shaft 62 • • Second conductive sheet 34... Insulating sleeve 63 • Conductive ring 35... Conductive bushing 7, * Oil seal Ring 36. Cover 8 , • Elastic element 37... Buckle ring 9 , * Light-emitting element
1313