201204935 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明係有關於種風扇結構，特別是有關於^一種使定 子的導磁結構成為框體的一部份而強化框體的風扇結構 〇 [0002] 【先前技術·】 現有的風扇結構的外框多為塑膠框。塑膠框因為結構剛 性較低，遇到外來激震力，很容易激起結構共振。為了 避免此現象，解決的方案有兩種，一種方案是改變框體 材料，改變材質，—加結構剛牲，以抑制振動，一般是 採用鋁擠製框體，但是這樣會提高製造的成本，另一種 方案是將馬達的形態改成三相馬達，以改變頓轉轉矩（ cogging torque)，但這種方式只是移開激震頻率（四 倍頻改成12倍頻），激震頻率並未完全消失，無法有效 地消除振動。 ◎ [0003] 【發明内容】 有鑑於此，本發明提供一種風扇結構，其是以定子中的 導磁結構做為風扇框體的一部份，以強化框體而抑制振 動，並搭配無槽式馬達的繞線，而形成一種定子在外且 轉子在内的無槽式馬達構造，以撤底消除頓轉轉矩，以 達到風扇零振動的目的。 [0004] 本發明的風扇結構的—較佳實施例包括一框體、一導磁 元件、一繞線組以及-轉子總成。框體具有一内表面， 導磁元件係包覆框體的内表面，繞線組侧繞導磁元件 設置，轉子總成係可旋轉地設於框體内。轉子總成包括 099123377 表單編號A0101 第3頁/共21頁 0992041174-0 201204935 [0005] [0006] [0007] [0008] [0009] [0010] [0011] [0012] 複數個扇葉以及一永久磁鐵。該等扇葉係結合於一轉軸 ，永久磁鐵係圍繞並結合於該等扇葉且相向於繞線組， 藉由永久磁鐵與繞線組之間的電磁作用，使轉子總成轉 動而驅動該等扇葉以轉軸為中心旋轉以產生氣流。 在上述的較佳實施例中，繞線組的外周面尺寸係對應於 導磁元件的内周面尺寸。 在上述的較佳實施例中，繞線組形成環狀且導磁元件的 内周面為圓筒狀，繞線組的外徑係配合導磁元件的内徑 〇 在上述的較佳實施例中，繞線組的外周面係抵接於導磁 元件的内周面。 在上述的較佳實施例中，永久磁鐵形成環狀且相向於繞 線組的内侧。 在上述的較佳實施例中，該等扇葉的外邊緣係連接於一 外周環，永久磁鐵係結合於外周環而可繞轉軸旋轉。 在上述的較佳實施例中，轉子總成更包括一鐵環，設於 外周環與永久磁鐵之間。 在上述的較佳實施例中，該等扇葉係連接於一軸套，軸 套套接於一軸承，軸承係結合於轉軸。 在上述的較佳實施例中，外周環、該等扇葉以及軸套係 一體成形。 在上述的較佳實施例中，導磁元件為矽鋼片模組，與框 體一體成形。框體係以射出成形的方式包覆於矽鋼片模 099123377 表單編號A0101 第4頁/共21頁 0992041174-0 [0013] 201204935 組，框體以塑膠材料製成。 [0014] ❹ [0015] [0016] [0017]Ο [0018] 本發明的風扇結構的另—較佳實施例是直接以導磁材料 形成框體，其包括一框體、一繞線組以及一轉子總成。 框體係以導磁材料製成’具有一内表面，繞線組係圍繞 框體的内表面設置’轉子總成係可旋轉地設於框體内， 轉子總成包括複數個扇葉以及一永久磁鐵。該等扇葉係 結合於一轉轴，永久磁鐵係圍繞並結合於該等扇葉且相 向於繞線組’藉由永久磁鐵與繞線組之間的電磁作用， 使轉子總成轉動而驅動該等扇葉以轉軸為中心旋轉以產 生氣流。 在上述的較隹實施例中，繞蜂組的外周面尺寸係對應於 内表面的尺寸。 在上述的較佳實施例中，繞線組形成環狀，繞線組的外 徑係配合框體的内徑。 在上述的較佳實施例中，繞線組的外周面係抵接於框體 的内表面。 ， 在上述的較佳實施例中，永久磁鐵形成環狀且相向於繞 線組的内侧。 [0019] 在上述的較佳實施例中，該等扇葉的外邊緣係連接於一 外周環’永久磁鐵係結合於外周環而可繞轉轴旋轉。 [0020] [0021] 在上述的較佳實施例中，該永久磁鐵係以緊配合的方式 結合於該外周環。 在上述的較佳實施例中，轉子總成更包括一鐵環’設於 099123377 表單煸號Α0101 第5頁/共21頁 0992041174-0 201204935 外周環與永久磁鐵之間。 [0022] 在上述的較佳實施例中，該等扇葉係連接於一軸套，轴 套套接於一軸承，轴承係結合於轉轴。 [0023] 在上述的較佳實施例中，外周環、該等扇葉以及軸套係 一體成形。 [0024] 在上述的較佳實施例中，繞線組以三相無槽式馬達的繞 線方式形成。 [0025] 發明的效果 [0026] 本發明的框體可以用矽鋼片組結合塑膠框體，得到以矽 鋼片組為骨架，塑赛框體為外觀的框架，可同時兼具金 屬框的剛性與塑膠框的韌性，除了強度足以抑制振動之 外，塑膠框體還可以保持美觀與設計感。 [0027] 另外，在框體直接以導磁性材料製成的情況下，由於導 磁性材料多為金屬，因此其強度也足以抑制振動。 [0028] 另外，本發明由於使框體成為定子的一部份，因此形成 定子在外且轉子總成在内的構造，與習知的風扇中，定 子置於轉子總成内部的構造相比，轉子總成内部空間僅 設置轉軸與軸承，轉子總成中心的面積可以減少，扇葉 的寬度變大，如此可加大出風口的面積，增加出風量。 [0029] 由於矽鋼片組或導磁材料形成的框體並無槽齒的構造， 因此繞線組可採用三相無槽式馬達的繞線型態，使繞線 組的外徑配合矽鋼片組的内徑，形成無槽式馬達的構造 ，完全不會產生頓轉轉矩。矽鋼片組的功能除了做為框 099123377 表單編號A0101 第6頁/共21頁 0992041174-0 201204935 [0030] [0031] Ο [0032]Ο [0033] 099123377 體的一部份之外，還可以導磁，使馬達呈現一封閉的磁 路，這與習知的有槽齒的定子構造是具有不同的效果。 為了讓本發明之上述和其他目的、特徵、和優點能更明 顯易懂，下文特舉較佳實施例，並配合所附圖示，作詳 細說明如下。 【實施方式】 第1圖表示本發明的風扇結構的一實施例的立體分解圖。 第2圖為第1圖的風扇結構組合後的平面圖。第3圖為第2 圖的剖視圖。如第1、2、3圖所示，本發明的風扇結構 100包括一框體10、一矽鋼片組（導磁元件）20、一繞線 組30、一永久磁鐵40、一鐵環50以及一風扇60。其中框 體10、矽鋼片組20以及繞線組30構成了風扇結構的定子 ，而永久磁鐵40、鐵環50以及風扇60構成了轉子總成。 以下先對定子的結構進行說明。 矽鋼片組20係以複數個矽鋼片排列而衝壓成形後，置於 一射出成形機的模具中，然後射出成形材料以形成框體 10，同時也使框體10與矽鋼片組20 —體成形，上述成形 材料在本實施例中為塑膠。如此，矽鋼片組20與框體10 結合，增加了框體10的強度，藉由框體10的成形材料也 可以使矽鋼片組20定型。框體10與矽鋼片組20 —體成形 之後，框體10的内表面12 (如第3圖所示）由矽鋼片組20 覆蓋。 繞線組30係以三相無槽式馬達的繞線方式形成，其形成 環狀並圍繞矽鋼片組20的内表面22，繞線組30的外表面 的尺寸可配合矽鋼片組20的内表面22的尺寸，由於矽鋼 表單編號Α0101 第7頁/共21頁 0992041174-0 201204935 外表面 内徨。 片組20的内表面22為圓筒形，因此該繞線組3〇的 的外徑係大體上相等於矽鋼片組20的内表面22的 [0034] 以下說明轉子總成的結構，其包括永久磁鐵4 0、 以及風扇60。 織環5〇 [0035] [0036] [0037] [0038] 風扇60包括一外周環62以及複數個扇葉64，扇葉64的外 邊緣係連接於外周環62，扇葉64的内邊緣連接於〜執套 66，請參照第3圖，軸套66套接於一軸承70，軸承7〇社 合於轉軸80，藉由上述構造，風扇60可繞轉軸80旋轉。 軸套66、扇葉64以及外周環62可以一體成形。 永久磁鐵40形成環狀，並以緊配合的方式結合於風扇 的外周環62，永久磁鐵40的外周面係相向於繞線組3〇。 藉由上述的構造，當供電於繞線組30時，藉由永久磁鐵 40與繞線組30之間的電磁作用，使轉子總成（包括風扇 60與永久磁鐵40)轉動而驅動扇葉64以該轉軸80為中心 旋轉而產生氣流。 另外，鐵環50可設於永久磁鐵4G輿風扇60的外周面62之 間，以增加導磁性，也可以不設置。 [0039] 第4圖表示本發明的另一實施例的平面圖。第5圖為第4圖 的剖視圖。在本實施例中，風扇結構200包括一框體21〇 、一繞線組230、一永久磁鐵240、一鐵環250以及—風 扇260。其中框體210以及繞線組230構成了風扇結構的 定子’而永久磁鐵240、鐵環250以及風扇26〇構成了轉 子總成。以下先對定子的結構進行說明。 099123377 表單編號A0101 第8頁/共21頁 0992041174-0 201204935 [0040] [0041] [0042] Ο [0043] [0044] 〇 [0045] 框體210係直接以導磁性材料製成該等材料的剛性大， 可以確保框體210具有足夠的強度。 繞線組23Q係以三相無槽式馬達的繞線方式形成，其形成 壤狀並圍繞框體210的内表面212，繞線組23〇的外表面 的尺寸可配合框體21〇的内表面212的尺寸，由於框體 210的内表面212為圓筒形，因此繞線組23〇的外表面的 外徑係大體上相等於框體21〇的内表面212的内徑。 以下說明轉子總成的結構，其包括永久磁鐵24()、鐵環 250以及風扇260。 風扇260包括一外周環262以及複數個扇葉264，扇葉264 的外邊緣係連接於外周環262，扇葉264的内邊緣連接於 一轴套266，軸套266套接於一軸承27Q，軸承27〇結合於 轉軸280，藉由上述構造，風扇26〇可繞轉軸28〇旋轉。 軸套266、扇葉264以及外周環262可以一體成形。 永久磁鐵240形成環狀’並以緊配合的方式結合於風扇 2 6 0的外周環2 62，永未磁鐵2 4 〇的外周面係相向於繞線 組230 〇 藉由上述的構造，當供電於繞線組230時，藉由永夂磁鐵 240與繞線組230之間的電磁作用，使轉子總成（包括風 扇260與永久磁鐵240 )轉動而驅動扇葉264以該轉轴280 為中心旋轉而產生氣流。 另外，鐵環250可設於永久磁鐵240與風扇260的外周面 262之間’以增加導磁性，也可以不設置。 099123377 表單編號A0101 第9頁/共21頁 0992041174-0 [0046] 201204935 [0047] 本發明的框體可以用矽鋼片組結合塑膠框體，得到以矽 鋼片組為骨架，塑膠框體為外觀的框架，可同時兼具金 屬框的剛性與塑膠框的韌性，除了強度足以抑制振動之 外，塑膠框體還可以保持美觀與設計感。 [0048] 另外，在框體直接以導磁性材料製成的情況下，由於導 磁性材料多為金屬，因此其強度也足以抑制振動。 [0049] 另外，本發明由於使框體成為定子的一部份，因此形成 定子在外且轉子總成在内的構造，與習知的風扇中，定 子置於轉子總成内部的構造相比，轉子總成内部空間僅 設置轉軸與軸承，轉子總成中心的面積可以減少，扇葉 的寬度變大，如此可加大出風口的面積，增加出風量。 [0050] 由於矽鋼片組或導磁材料形成的框體並無槽齒的構造， 因此繞線組可採用三相無槽式馬達的繞線型態，使繞線 組的外徑配合矽鋼片組的内徑，形成無槽式馬達的構造 ，完全不會產生頓轉轉矩。矽鋼片組的功能除了做為框 體的一部份之外，還可以導磁，使馬達呈現一封閉的磁 路，如附件1所示，這與習知的有槽齒的定子構造是具有 不同的效果。 [0051] 雖然本發明已以較佳實施例揭露如上，然其並非用以限 定本發明，任何熟習此技藝者，在不脫離本發明之精神 和範圍内，當可作些許之更動與潤飾，因此本發明之保 護範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 [0052] 第1圖表示本發明的風扇結構的一實施例的立體分解圖。 099123377 表單編號A0101 第10頁/共21頁 0992041174-0 201204935 - [0053] 第2圖為第1圖的風扇結構組合後的平面圖。 [0054] 第3圖為第2圖的剖視圖。 [0055] 第4圖為本發明的風扇結構的另一實施例的平面圖。 [0056] 第5圖為第4圖的剖視圖。 [0057] 附件1表示第3圖的風扇結構中，矽鋼片的磁場強度的彩 色圖。201204935 VI. Description of the Invention: [Technical Field] [0001] The present invention relates to a fan structure, and more particularly to a fan for reinforcing a frame by making a magnetic conductive structure of a stator a part of a frame Structure 〇 [0002] [Prior Art] The outer frame of the existing fan structure is mostly a plastic frame. Due to the low structural rigidity of the plastic frame, it is easy to provoke structural resonance when it encounters external shock. In order to avoid this phenomenon, there are two solutions. One solution is to change the frame material, change the material, and add the structure to suppress the vibration. Generally, the aluminum extrusion frame is used, but this will increase the manufacturing cost. Another solution is to change the shape of the motor to a three-phase motor to change the cogging torque, but this method only removes the shock frequency (four times the frequency is changed to 12 times the frequency), and the shock frequency is not completely Disappeared, unable to effectively eliminate vibration. ◎ [0003] In view of the above, the present invention provides a fan structure, which is a magnetically permeable structure in the stator as part of the fan frame, to strengthen the frame to suppress vibration, and with no slot The winding of the motor forms a slotless motor structure with the stator outside and the rotor, so as to eliminate the torque of the rotor to achieve zero vibration of the fan. A preferred embodiment of the fan structure of the present invention includes a frame, a magnetically permeable member, a winding assembly, and a rotor assembly. The frame body has an inner surface, the magnetic conductive element covers the inner surface of the frame body, the winding group side is disposed around the magnetic conductive element, and the rotor assembly is rotatably disposed in the frame body. The rotor assembly includes 099123377 Form No. A0101 Page 3 / 21 pages 0992041174-0 201204935 [0005] [0007] [0008] [0009] [0011] [0012] A plurality of blades and a permanent magnet. The fan blade is coupled to a rotating shaft, and the permanent magnet surrounds and is coupled to the blades and faces the winding group. The electromagnetic assembly between the permanent magnet and the winding group causes the rotor assembly to rotate to drive the fan blade. The blades are rotated about the axis of rotation to generate airflow. In the above preferred embodiment, the outer peripheral surface size of the winding group corresponds to the inner peripheral surface size of the magnetic conductive member. In the above preferred embodiment, the winding group is formed in a ring shape and the inner peripheral surface of the magnetic conductive member is cylindrical, and the outer diameter of the winding group is matched with the inner diameter of the magnetic conductive member. In the above preferred embodiment The outer peripheral surface of the winding group abuts against the inner peripheral surface of the magnetic conductive element. In the preferred embodiment described above, the permanent magnets form an annular shape and face the inner side of the winding set. In the preferred embodiment described above, the outer edges of the blades are coupled to a peripheral ring that is coupled to the outer peripheral ring for rotation about the axis of rotation. In the preferred embodiment described above, the rotor assembly further includes an iron ring disposed between the outer peripheral ring and the permanent magnet. In the above preferred embodiment, the fan blades are coupled to a sleeve, the sleeve is sleeved to a bearing, and the bearing is coupled to the shaft. In the preferred embodiment described above, the outer peripheral ring, the blades, and the sleeve are integrally formed. In the preferred embodiment described above, the magnetically permeable element is a silicon steel sheet module integrally formed with the frame. The frame system is coated on the silicon steel sheet mold by injection molding. 099123377 Form No. A0101 Page 4 of 21 0992041174-0 [0013] 201204935 Group, the frame is made of plastic material. [0017] [0017] [0017] Another preferred embodiment of the fan structure of the present invention is to form a frame directly with a magnetically permeable material, which includes a frame, a winding set, and A rotor assembly. The frame system is made of a magnetically permeable material having an inner surface, and the winding assembly is disposed around the inner surface of the frame. The rotor assembly is rotatably disposed in the frame. The rotor assembly includes a plurality of blades and a permanent magnet. The fan blades are coupled to a rotating shaft, and the permanent magnets surround and are coupled to the blades and face the winding group. The electromagnetic assembly between the permanent magnets and the winding group causes the rotor assembly to rotate and drive. The blades are rotated about the axis of rotation to generate an air flow. In the above-described comparative embodiment, the outer peripheral surface size of the winding bee group corresponds to the size of the inner surface. In the above preferred embodiment, the winding group is formed in a ring shape, and the outer diameter of the winding group is matched with the inner diameter of the frame. In the above preferred embodiment, the outer peripheral surface of the winding set abuts against the inner surface of the frame. In the preferred embodiment described above, the permanent magnets are formed in a ring shape and face each other toward the inner side of the winding group. [0019] In the preferred embodiment described above, the outer edges of the blades are coupled to a peripheral ring. The permanent magnets are coupled to the outer peripheral ring for rotation about the axis of rotation. [0021] In the preferred embodiment described above, the permanent magnet is coupled to the outer peripheral ring in a tight fit. In the preferred embodiment described above, the rotor assembly further includes an iron ring set at 099123377. Form number Α 0101 Page 5 / Total 21 page 0992041174-0 201204935 Between the outer circumference ring and the permanent magnet. [0022] In the above preferred embodiment, the fan blades are coupled to a sleeve, the sleeve is sleeved to a bearing, and the bearing is coupled to the shaft. [0023] In the preferred embodiment described above, the outer peripheral ring, the blades, and the sleeve are integrally formed. [0024] In the preferred embodiment described above, the winding set is formed in a winding manner of a three-phase, slotless motor. [0025] Effect of the Invention [0026] The frame body of the present invention can be combined with a plastic frame by a silicon steel sheet group, and a frame with a steel sheet group as a skeleton and a plastic game frame body as an appearance can be obtained, which can simultaneously have the rigidity of the metal frame. The toughness of the plastic frame, in addition to the strength enough to suppress vibration, the plastic frame can maintain the aesthetic and design sense. [0027] In addition, in the case where the frame body is directly made of a magnetic conductive material, since the magnetic conductive material is mostly metal, its strength is also sufficient to suppress vibration. [0028] In addition, the present invention forms a structure in which the stator is outside and the rotor assembly is formed by making the frame part of the stator. Compared with the conventional fan, the stator is placed inside the rotor assembly. The inner space of the rotor assembly is only provided with the rotating shaft and the bearing, the area of the center of the rotor assembly can be reduced, and the width of the fan blade is increased, so that the area of the air outlet can be increased, and the air volume can be increased. [0029] Since the frame formed by the silicon steel sheet group or the magnetic conductive material has no groove structure, the winding group can adopt a winding type of a three-phase slotless motor, so that the outer diameter of the winding group is matched with the silicon steel sheet. The inner diameter of the set forms a configuration of the slotless motor and does not generate a torsional torque at all. The function of the silicon steel sheet group is shown as box 099123377 Form No. A0101 Page 6 / 21 pages 0992041174-0 201204935 [0030] [0031] Ο [0032] Ο [0033] 099123377 In addition to a part of the body, it can also be guided Magnetic, the motor presents a closed magnetic circuit, which has a different effect than the conventional slotted stator construction. The above and other objects, features, and advantages of the present invention will become more <RTIgt; [Embodiment] Fig. 1 is an exploded perspective view showing an embodiment of a fan structure of the present invention. Fig. 2 is a plan view showing the combination of the fan structures of Fig. 1. Figure 3 is a cross-sectional view of Figure 2. As shown in the first, second, and third figures, the fan structure 100 of the present invention includes a frame 10, a silicon steel sheet set (magnetic conductive element) 20, a winding set 30, a permanent magnet 40, an iron ring 50, and A fan 60. The frame 10, the silicon steel sheet set 20 and the winding set 30 constitute a stator of a fan structure, and the permanent magnet 40, the iron ring 50 and the fan 60 constitute a rotor assembly. The structure of the stator will be described below first. The steel sheet group 20 is formed by a plurality of silicon steel sheets and formed by press forming, and then placed in a mold of an injection molding machine, and then the molding material is injected to form the frame body 10, and the frame body 10 and the silicon steel sheet group 20 are also integrally formed. The above shaped material is a plastic in this embodiment. Thus, the combination of the silicon steel sheet group 20 and the frame body 10 increases the strength of the frame body 10, and the silicon carbide sheet group 20 can also be shaped by the molding material of the frame body 10. After the frame 10 and the silicon steel sheet set 20 are integrally formed, the inner surface 12 of the frame 10 (as shown in Fig. 3) is covered by the silicon steel sheet group 20. The winding group 30 is formed by winding a three-phase slotless motor, which is formed in a ring shape and surrounds the inner surface 22 of the silicon steel sheet set 20. The outer surface of the winding group 30 is sized to fit within the steel sheet group 20. The size of the surface 22, due to the 矽 表单 表单 表单 101 0101 page 7 / 21 pages 0992041174-0 201204935 outer surface 徨. The inner surface 22 of the sheet set 20 is cylindrical, such that the outer diameter of the winding set 3〇 is substantially equal to the inner surface 22 of the silicon steel sheet set 20 [0034] The structure of the rotor assembly is described below, including Permanent magnet 40 and fan 60. [0038] The fan 60 includes a peripheral ring 62 and a plurality of blades 64. The outer edges of the blades 64 are coupled to the outer peripheral ring 62, and the inner edges of the blades 64 are connected. Referring to FIG. 3, the sleeve 66 is sleeved on a bearing 70, and the bearing 7 is coupled to the rotating shaft 80. With the above configuration, the fan 60 is rotatable about the rotating shaft 80. The sleeve 66, the fan blades 64, and the outer peripheral ring 62 may be integrally formed. The permanent magnet 40 is formed in a ring shape and is coupled to the outer peripheral ring 62 of the fan in a tight fit manner, and the outer peripheral surface of the permanent magnet 40 faces the winding group 3〇. With the above configuration, when the power is supplied to the winding group 30, the rotor assembly (including the fan 60 and the permanent magnet 40) is rotated by the electromagnetic action between the permanent magnet 40 and the winding group 30 to drive the blade 64. The airflow is generated by rotating about the rotating shaft 80. Further, the iron ring 50 may be provided between the outer peripheral faces 62 of the permanent magnets 4G and the fan 60 to increase the magnetic permeability or not. 4 is a plan view showing another embodiment of the present invention. Figure 5 is a cross-sectional view of Figure 4. In the present embodiment, the fan structure 200 includes a frame 21〇, a winding set 230, a permanent magnet 240, an iron ring 250, and a fan 260. The frame 210 and the winding set 230 constitute a stator ′ of the fan structure, and the permanent magnet 240, the iron ring 250 and the fan 26 〇 constitute a rotor assembly. The structure of the stator will be described below first. 099123377 Form No. A0101 Page 8 of 21 0992041174-0 201204935 [0041] [0044] [0044] [0045] The frame 210 is made directly of a magnetically permeable material. The rigidity is large, and it is ensured that the frame 210 has sufficient strength. The winding group 23Q is formed by winding a three-phase slotless motor, which is formed in a soil shape and surrounds the inner surface 212 of the frame 210. The outer surface of the winding group 23〇 is sized to fit within the frame 21〇. The size of the surface 212, since the inner surface 212 of the frame 210 is cylindrical, the outer diameter of the outer surface of the winding set 23A is substantially equal to the inner diameter of the inner surface 212 of the frame 21〇. The structure of the rotor assembly will be described below, which includes a permanent magnet 24 (), a hoop 250, and a fan 260. The fan 260 includes a peripheral ring 262 and a plurality of blades 264. The outer edge of the blade 264 is connected to the outer peripheral ring 262. The inner edge of the blade 264 is connected to a sleeve 266. The sleeve 266 is sleeved on a bearing 27Q. The bearing 27 is coupled to the rotating shaft 280. With the above configuration, the fan 26 is rotatable about the rotating shaft 28〇. The sleeve 266, the fan blade 264, and the outer peripheral ring 262 may be integrally formed. The permanent magnet 240 is formed in an annular shape and is coupled to the outer peripheral ring 2 62 of the fan 260 in a tight fit manner, and the outer peripheral surface of the permanent magnet 24 〇 is opposed to the winding group 230 〇 by the above configuration, when the power is supplied When the winding group 230 is rotated, the rotor assembly (including the fan 260 and the permanent magnet 240) is rotated by the electromagnetic action between the permanent magnet 240 and the winding group 230 to drive the fan blade 264 around the rotating shaft 280. Rotate to create airflow. Further, the iron ring 250 may be provided between the permanent magnet 240 and the outer peripheral surface 262 of the fan 260 to increase the magnetic permeability or may not be provided. 099123377 Form No. A0101 Page 9/Total 21 Page 0992041174-0 [0046] [0047] The frame of the present invention can be combined with a plastic frame by a silicon steel sheet set, and a steel frame is used as a skeleton, and the plastic frame is an appearance. The frame can simultaneously have the rigidity of the metal frame and the toughness of the plastic frame. In addition to being strong enough to suppress vibration, the plastic frame can maintain the aesthetic and design sense. Further, in the case where the frame body is directly made of a magnetic conductive material, since the magnetic conductive material is mostly metal, its strength is also sufficient to suppress vibration. [0049] In addition, the present invention forms a structure in which the stator is external and the rotor assembly is formed by making the frame part of the stator. Compared with the conventional fan, the stator is placed inside the rotor assembly. The inner space of the rotor assembly is only provided with the rotating shaft and the bearing, the area of the center of the rotor assembly can be reduced, and the width of the fan blade is increased, so that the area of the air outlet can be increased, and the air volume can be increased. [0050] Since the frame formed by the silicon steel sheet group or the magnetic conductive material has no groove structure, the winding group can adopt a winding type of a three-phase slotless motor, so that the outer diameter of the winding group is matched with the silicon steel sheet. The inner diameter of the set forms a configuration of the slotless motor and does not generate a torsional torque at all. In addition to being part of the frame, the function of the silicon steel sheet group can also be magnetically guided to cause the motor to present a closed magnetic circuit, as shown in Annex 1, which has the structure of a conventional slotted stator. Different effects. [0051] While the invention has been described above in terms of a preferred embodiment, it is not intended to limit the invention, and those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS [0052] Fig. 1 is an exploded perspective view showing an embodiment of a fan structure of the present invention. 099123377 Form No. A0101 Page 10 of 21 0992041174-0 201204935 - [0053] Fig. 2 is a plan view showing the combination of the fan structures of Fig. 1. 3 is a cross-sectional view of FIG. 2 . 4 is a plan view showing another embodiment of the fan structure of the present invention. [0056] FIG. 5 is a cross-sectional view of FIG. 4. [0057] Annex 1 shows a color diagram of the magnetic field strength of the silicon steel sheet in the fan structure of Fig. 3.
【主要元件符號說明】 [0058] 10〜 框體 [0059] 12〜 内表面 [0060] 2 0〜 矽鋼片組（導磁元件） [0061] 22〜 内表面 [0062] 30〜 繞線組 [0063] 40〜 永久磁鐵 [0064] 50〜 鐵環 [0065] 60〜 風扇 [0066] 62〜 外周環 [0067] 64〜 扇葉 [0068] 6 6〜 軸套 [0069] 70〜 軸承 [0070] 8 0〜 轉軸 表單編號A0101 第11頁/共21頁 099123377 0992041174-0 201204935 [0071] 100〜 風扇結構 [0072] 210〜 框體 [0073] 212〜 内表面 [0074] 230〜 繞線組 [0075] 240〜 永久磁鐵 [0076] 250〜 鐵環 [0077] 260〜 風扇 [0078] 262〜 外周環 [0079] 264〜 •扇葉 [0080] 266 - •軸套 [0081] 270〜 /軸承 [0082] 280〜 /轉轴 [0083] 200 - /風扇結構 099123377 表單編號A0101 第12頁/共21頁 0992041174-0[Main component symbol description] [0058] 10~ Frame [0059] 12~ Inner surface [0060] 2 0~ 矽Steel sheet group (magnetic conductive element) [0061] 22~ Inner surface [0062] 30~ Winding group [ 0063] 40~ permanent magnet [0064] 50~ iron ring [0065] 60~ fan [0066] 62~ outer ring [0067] 64~ fan blade [0068] 6 6~ bushing [0069] 70~ bearing [0070] 8 0~ Shaft form number A0101 Page 11 / 21 pages 099123377 0992041174-0 201204935 [0071] 100~ Fan structure [0072] 210~ Frame [0073] 212~ Inner surface [0074] 230~ Winding group [0075 ] 240~ permanent magnet [0076] 250~ iron ring [0077] 260~ fan [0078] 262~ outer ring [0079] 264~ • fan blade [0080] 266 - • bushing [0081] 270~ / bearing [0082 ] 280~ / Shaft [0083] 200 - / Fan Structure 099123377 Form No. A0101 Page 12 / Total 21 Page 0992041174-0