201235771 六、發明說明： 【發明所屬之技術領威】 [0001] 本發明關於/種光圈調整裝置，特別關於一種具有 齒輪環的光圈調整裝置。 【先前技術】 [0002] 請參閱第1圖及第2圖’其為一種習知的光圈調整裝 置9。光圈調整裝置9包含一框體91、一齒輪環92、一葉 片93、一步進馬達94及一蓋板95。 [_3] 齒輪環92利用複數掛轴922分別於蓋板95之複數滑溝 951滑動，可轉動地懸掛於蓋板95上，且具有一個導溝 921。葉片93可擺動地連接於框體91，且部分遮蔽框體 91的光圈孔911。此外，葉片93具有一凸柱931，伸入於 齒輪環92的導溝921中。步進馬達94及蓋板95則是固定 在框體91上，並且步進馬達94的驅動齒輪941跟齒輪環 9 2相誓合。 [0004] [0005] [0006] 當步進馬達94轉動時，可帶動驅動齒輪941及齒輪環 92轉動*輪環92轉動時，位在導溝921的^柱奶會被 齒輪環92推動’進而迫使葉片93相對於框體91擺動。隨 著葉片93的擺動角度増加，光圈孔911被葉片93遮蔽的面 積也曰乓加。光圈孔911被葉片93遮蔽的面積與光圈孔 911的原始面積的比值可稱做『遮蔽率』。 因此’藉由控制步進馬達94的轉動量（轉動步數） ’即可控制光圈孔911的遮蔽率。 由上述可知，習知的光圈調整裝置9可順利實現光圈 100105712 表單編號A0101 第4頁/共26頁 1002009799-0 201235771 調整的目的’但是仍有些缺失’說明如下。 [0007] 1.葉片93的擺動範圍是由導溝921的長度所控制。當 導溝921越長時’葉片93的擺動範圍會越大，而光 圈孔911的遮蔽率也會越大。然而，齒輪環92受限 於必需設置供步進馬達94之驅動齒輪941嗜合之齒 、以及用以將齒輪環92掛在蓋板95上之掛轴922等 其他元件’因而沒有足夠的面積來供導溝92丨延長， 因此光圈孔911的遮蔽率難以提升。 2. 為細微控制遮蔽率’使遮蔽率的變化增量較小，必 需減少步進馬達94每轉一步所造成的齒輪環92轉動 角度之增量。驅動齒輪941與齒輪環92的轉速比越 大時，步進馬達94每轉一步所造成的齒輪環92轉動 角度增量越小’葉片93的擺動角度增量也會越小， 進而使遮蔽率的變化增量較小，此舉有益於進光量 之細微控制。然而，減少驅動齒輪941之齒數以增加 轉速比，有其限制，因此驅動齒輪941與齒輪環“ 的轉速比不易提升。另外，若減小步進馬達94每轉 動一步之角度，以減少步進馬達94每轉—步所造成 的齒輪環92轉動角度之增量，亦受限於步進馬達94 之規格。因此，習知光圈調整裝置9之光圈孔“^遮 蔽率的變化增量較大，不利於進光量之細微控制。 3. 齒輪環92是掛在蓋板95上，因此齒輪環92需要有掛 轴922。然而掛軸922加工不易，且掛轴922需要較 高的加工精度，才能讓齒輪環92順暢地轉動，因此 不利用大量生產。另，掛轴922與蓋板95之間的摩 100105712 表單編號A0101 第5頁/共26頁 1002009799-0 201235771 擦力較大，使得驅動該齒輪環92的扭力需較大。 4. 齒輪環92因為需設置掛轴922和導溝921，齒輪環92 的尺寸會較大，齒輪環92的重量也會較重，造成驅 動齒輪環9 2的扭力必需增加。 [0008] 有鑑於此，提供一種可改善至少一種上述缺失的光 圈調整裝置，乃為此業界亟待解決的問題。 【發明内容】 [0009] 本發明之一目的在於提供一種光圈調整裝置，其具 有較長的導溝，以增加葉片的擺動範圍，進而增加光圈 孔的遮蔽率。 [0010] 本發明一實施例所揭露的光圈調整裝置，包括一支 架、一齒輪環、至少一葉片及一連接件。該支架包— 光圈孔及一第一導溝，並具有一第一側及與該第一側相 對之一第二側。該齒輪環可轉動地設置於該支架之該第 一側，而該至少一葉片可擺動地設置於該支架之該第二 側，用以部分遮蔽該光圈孔。該連接件固定於該齒輪環 並穿過該第一導溝與該至少一葉片連接。該齒輪環適以 轉動該齒輪環而使該連接件沿著該第一導溝移動，以帶 動該至少一葉片擺動。 [0011] 藉此，本發明一實施例的支架可提供較大的面積供 第一導溝延長，因此齒輪環的旋轉範圍及葉片的擺動範 圍均可增加，進而增加光圈孔的遮蔽率。此外，齒輪環 不需要設置導溝，因此齒輪環的尺寸及重量都可減少， 進而減少驅動齒輪環所需的扭力。 100105712 表單編號A0101 第6頁/共26頁 1002009799-0 201235771 [0012] 為讓上述一目的、技術特徵及優點能更明顯易懂， 下文係以較佳之實施例配合所附圖式進行詳細說明。 【實施方式】 [〇〇13] 請參閱第3至第5圖，為本發明的光圈調整裝置1的一 較佳實施例。該光圈調整裝置1可裝設於一投影機（圖未 示）中，以調整投影機所投射出的光線的亮度。該光圈 調整裝置1包括一支架11、一齒輪環12、至少一葉片13、 一連接件14及一驅動模組15。 〇 [〇〇14] 請參閱第5圖及第6圖之一實施例，支架11可為一圓 盤結構，且具有一第一側以及與第一侧栢對之一第二侧 / 。此外’支架11包含一光圈孔111、一第一導溝112、一 環狀凹陷113、一容置空間114、一肋部11:5及多個凸點 116 ° 光圈孔111可位於支架11的中心處，而第一導溝112 位於光圈孔ill的外圍，且沿著光圈孔ill的圓周方向延 伸。光圈孔1 Π及第一導溝112都軸向地貫通支架11。環 狀凹陷113則是設置在支架11的第一側，且環繞光圈孔 111，而第一導溝112位於環狀凹陷113中。容置空間114 位於支架11的周緣處，且軸向地貫通支架11 ^此外，容 置空間114更與環狀凹陷113相連通。肋部115可為一長 條狀結構，且設置在支架11的第二侧，並沿著光圈孔111 的周向延伸。凸點116可為半球狀或半圓柱狀的結構，且 設置於環狀凹陷113中，並沿著光圈孔in的周向等距分 佈0 [0016] 100105712 齒輪環12大致上可呈一圓環形，其外環面具有多個 表單編號A0101 第7頁/共26頁 1002009799-0 201235771 齒121。齒輪環12可轉動地設置於支架丨丨的第一側。齒輪 環12沿著-旋轉軸線122旋轉，並且旋轉軸線122可通過 光圈孔111的軸心，因此齒輪環12實際上可沿著光圈孔 111的軸心旋轉。此外，齒輪環12更設置於環狀凹陷 中’以限制齒輪環12相對光圈孔⑴徑向移動，如第4圖 所示。齒輪環12的内環面與凸點116相接觸，形成點與面 或是線與面的接觸，所以齒輪環12與支架u的接觸面積 較少，因此齒輪環12相對支架丨丨之轉動時，摩擦力較小 [0017] [0018] [0019] 值得一提的是’支架11與齒輪環12的材料無特別限 定。於實際應用上，本發明之支架丨丨可為塑膠射出成形 ，而齒輪環12之材質可為金展（例如銅）^較佳地，支架 11係以有自潤性之材質製成，藉此不需外加潤滑油，齒 輪環12即可順暢地相對支架u旋轉。 至少一葉片13可大致呈一彎月形結構，用以部分地 遮蔽光圈孔111。在一實施例中，葉片13包含相互疊置的 第葉片13A及第二葉;;片、DB;;.、其令’第一葉片13A 與肋部115接觸，以減少與支架丨丨的接觸面積，進而減少 摩擦力而易於擺動。第一葉片13A的第二導溝132至轉軸 131的距離比第二葉片13B的短，且第一葉片13A之轉軸 131相較於第二葉片13B之轉軸131，較為接近齒輪環12 的旋轉軸線122。各葉片13A、13B具有一轉軸131及一第 二導溝132。第二導溝132更是沿一延伸方向延伸，且該 延伸方向可通葉片13的轉軸131。201235771 VI. Description of the Invention: [Technical Leadership of Invention] [0001] The present invention relates to an aperture adjustment apparatus, and more particularly to an aperture adjustment apparatus having a gear ring. [Prior Art] [0002] Please refer to Figs. 1 and 2, which is a conventional aperture adjusting device 9. The aperture adjusting device 9 includes a frame 91, a gear ring 92, a blade 93, a stepping motor 94, and a cover plate 95. [_3] The gear ring 92 is slidably slidably mounted on the cover plate 95 by a plurality of hanging shafts 922 respectively on the plurality of sliding grooves 951 of the cover plate 95, and has a guide groove 921. The blade 93 is swingably coupled to the frame 91 and partially shields the aperture hole 911 of the frame 91. Further, the vane 93 has a boss 931 which projects into the guide groove 921 of the gear ring 92. The stepping motor 94 and the cover plate 95 are fixed to the frame 91, and the drive gear 941 of the stepping motor 94 is engaged with the gear ring 92. [0006] [0006] When the stepping motor 94 rotates, the driving gear 941 and the gear ring 92 can be rotated. When the wheel ring 92 rotates, the milk in the guide groove 921 will be pushed by the gear ring 92. The blade 93 is then forced to swing relative to the frame 91. As the swing angle of the blade 93 increases, the area of the aperture hole 911 blocked by the blade 93 is also increased. The ratio of the area of the aperture hole 911 blocked by the blade 93 to the original area of the aperture hole 911 can be referred to as the "shadowing rate". Therefore, the shielding rate of the aperture hole 911 can be controlled by controlling the amount of rotation (the number of rotation steps) of the stepping motor 94. As can be seen from the above, the conventional aperture adjusting device 9 can smoothly realize the aperture 100105712 Form No. A0101 Page 4 of 26 1002009799-0 201235771 The purpose of the adjustment 'but still somewhat missing' is explained below. 1. The swing range of the blade 93 is controlled by the length of the guide groove 921. When the guide groove 921 is longer, the swing range of the blade 93 is larger, and the masking rate of the diaphragm hole 911 is also larger. However, the gear ring 92 is limited by the teeth that must be provided for the drive gear 941 of the stepping motor 94, and the other components such as the hanging shaft 922 for hanging the gear ring 92 on the cover plate 95, thus having insufficient area. Since the guide groove 92 is extended, the shielding rate of the aperture hole 911 is difficult to increase. 2. In order to finely control the shielding rate, the increment of the change in the shielding rate is small, and it is necessary to reduce the increment of the rotation angle of the gear ring 92 caused by one step per step of the stepping motor 94. When the ratio of the rotational speed of the drive gear 941 to the gear ring 92 is larger, the smaller the increment of the rotational angle of the gear ring 92 caused by the stepping motor 94 per revolution, the smaller the swing angle increment of the blade 93, and thus the shielding rate. The increment of the change is small, which is beneficial to the fine control of the amount of light entering. However, reducing the number of teeth of the driving gear 941 to increase the speed ratio has a limitation, so that the speed ratio of the driving gear 941 to the gear ring is not easily improved. In addition, if the stepping motor 94 is rotated by one step, the stepping is reduced. The increment of the rotation angle of the gear ring 92 caused by the motor 94 per revolution is also limited by the specification of the stepping motor 94. Therefore, the aperture of the conventional aperture adjustment device 9 has a large increment of the shielding rate. It is not conducive to the fine control of the amount of light entering. 3. The gear ring 92 is attached to the cover plate 95, so the gear ring 92 requires a hanging shaft 922. However, the hanging shaft 922 is not easy to process, and the hanging shaft 922 requires a high machining precision to allow the gear ring 92 to smoothly rotate, so that mass production is not utilized. In addition, the friction between the hanging shaft 922 and the cover plate 100100105712 Form No. A0101 Page 5 of 26 1002009799-0 201235771 The friction force is large, so that the torque for driving the gear ring 92 needs to be large. 4. Since the gear ring 92 needs to be provided with the hanging shaft 922 and the guide groove 921, the size of the gear ring 92 is large, and the weight of the gear ring 92 is also heavy, so that the torque of the drive gear ring 92 must be increased. In view of the above, it is an urgent problem to be solved in the art to provide a diaphragm adjusting device that can improve at least one of the above-mentioned deficiencies. SUMMARY OF THE INVENTION [0009] An object of the present invention is to provide a diaphragm adjusting device having a long guide groove to increase the swing range of the blade, thereby increasing the shielding rate of the aperture. [0010] The aperture adjusting device disclosed in one embodiment of the present invention includes a rack, a gear ring, at least one blade, and a connecting member. The bracket package - the aperture aperture and a first guide groove, has a first side and a second side opposite the first side. The gear ring is rotatably disposed on the first side of the bracket, and the at least one blade is swingably disposed on the second side of the bracket for partially shielding the aperture. The connector is fixed to the gear ring and connected to the at least one blade through the first guide groove. The gear ring is adapted to rotate the gear ring to move the connector along the first guide groove to drive the at least one blade to swing. [0011] Thereby, the bracket of one embodiment of the present invention can provide a larger area for the first guide groove to be extended, so that the range of rotation of the gear ring and the swing range of the blade can be increased, thereby increasing the shielding rate of the aperture hole. In addition, the gear ring does not need to be provided with a guide groove, so the size and weight of the gear ring can be reduced, thereby reducing the torque required to drive the gear ring. 100105712 Form No. A0101 Page 6 of 26 1002009799-0 201235771 [0012] The above described objects, features and advantages will be more apparent from the following description. [Embodiment] [〇〇13] Please refer to Figs. 3 to 5, which are a preferred embodiment of the aperture adjusting device 1 of the present invention. The aperture adjustment device 1 can be mounted in a projector (not shown) to adjust the brightness of the light projected by the projector. The aperture adjusting device 1 includes a bracket 11, a gear ring 12, at least one blade 13, a connecting member 14, and a driving module 15. 〇 [〇〇14] Referring to an embodiment of Figures 5 and 6, the bracket 11 can be a disk structure and has a first side and a second side with the first side cypress pair. In addition, the bracket 11 includes a diaphragm hole 111, a first guiding groove 112, an annular recess 113, an accommodating space 114, a rib 11:5, and a plurality of bumps 116. The aperture hole 111 can be located in the bracket 11. At the center, the first guide groove 112 is located at the periphery of the aperture hole ill and extends in the circumferential direction of the aperture hole ill. Both the aperture hole 1 and the first guide groove 112 axially penetrate the bracket 11. The annular recess 113 is disposed on the first side of the bracket 11 and surrounds the aperture 111, and the first guide groove 112 is located in the annular recess 113. The accommodating space 114 is located at the periphery of the bracket 11 and penetrates the bracket 11 axially. Further, the accommodating space 114 is further in communication with the annular recess 113. The rib 115 may be an elongated structure and disposed on the second side of the bracket 11 and extending along the circumferential direction of the aperture hole 111. The bump 116 may be a hemispherical or semi-cylindrical structure, and is disposed in the annular recess 113 and equidistantly distributed along the circumferential direction of the aperture hole in. [0016] 100105712 The gear ring 12 may substantially be a ring. Shape, the outer torus has a plurality of form numbers A0101, page 7 / total 26 pages 1002009799-0 201235771 teeth 121. The gear ring 12 is rotatably disposed on a first side of the bracket 。. The gear ring 12 rotates along the -rotation axis 122, and the axis of rotation 122 can pass through the axis of the aperture opening 111, so that the gear ring 12 can actually rotate along the axis of the aperture opening 111. Further, the gear ring 12 is further disposed in the annular recess to restrict the radial movement of the gear ring 12 relative to the aperture (1) as shown in Fig. 4. The inner annular surface of the gear ring 12 is in contact with the bump 116 to form a point-to-face or line-to-surface contact, so that the contact area of the gear ring 12 with the bracket u is small, so that the gear ring 12 rotates relative to the bracket 丨丨The friction is small [0017] [0019] It is worth mentioning that the material of the bracket 11 and the gear ring 12 is not particularly limited. In practical applications, the bracket 本 of the present invention can be plastic injection molding, and the material of the gear ring 12 can be a gold exhibition (for example, copper). Preferably, the bracket 11 is made of a self-lubricating material. This eliminates the need for additional lubricant and the gear ring 12 can smoothly rotate relative to the bracket u. At least one of the vanes 13 may have a generally meniscus structure to partially shield the aperture opening 111. In one embodiment, the blade 13 includes a first blade 13A and a second blade that are superposed on each other; a sheet, DB;; which causes the first blade 13A to contact the rib 115 to reduce contact with the bracket The area, which in turn reduces friction, is easy to swing. The distance from the second guide groove 132 of the first blade 13A to the rotating shaft 131 is shorter than that of the second blade 13B, and the rotating shaft 131 of the first blade 13A is closer to the rotating shaft 131 of the second blade 13B, and is closer to the rotating axis of the gear ring 12. 122. Each of the blades 13A, 13B has a rotating shaft 131 and a second guiding groove 132. The second guiding groove 132 extends in an extending direction, and the extending direction can pass through the rotating shaft 131 of the blade 13.
凊配合參閱第7圖及第8圖之一實施例，第一葉片13A 100105712 表單編號A0101 第8頁/共26頁 1002009799-0 201235771凊With reference to an embodiment of Figures 7 and 8, the first blade 13A 100105712 Form No. A0101 Page 8 of 26 1002009799-0 201235771
及第二葉片13Β可擺動地設置於支架11的第二側，轉軸 131及第二導溝13 2則大致分別位在光圈孔111徑向的兩 侧。第一葉片13Α及一第二葉片13Β分別沿著轉軸131相 對於支架11擺動’而第二導溝132之延伸方向通過齒輪環 12的旋轉轴線122 (或是光圈孔ill的軸心），以避免連 接件14在帶動第一葉片13 Α及第二葉片13Β時發生干涉。 此外’由光圈孔111的軸向觀之，第二導溝132與第一導 溝112部分地重疊；且隨著第一葉片is a及第二葉片13B ❹ [0020] 的擺動角度改變，光圈孔111被遮蔽的面積（遮蔽率）會 隨著改變。 葉片13 (第一葉片13A及第二葉片13B)可由金屬（ 例如銅）所製成’因為支架丨丨較佳地係以有自潤性之材質 製成’所以不需外加潤滑油，亦可順暢地相對支架丨j旋 轉。 [0021] Ο 連接件14可為一圓柱體，且固定於齒輪環12上，以 隨著齒輪環12—起轉動,連接件η穿過第一導溝丨12，當 齒輪環12轉動時，連接件14沿著第一導溝112移動。如第 7圖及第8圖所示，當連接件14移動到第一導溝112的末端 時，齒輪環12將無法繼續旋轉。由此可知，第一導溝Η? 的長度可限制齒輪環12的旋轉範圍，第一導溝112的長度 (二末端間的距離）越大，齒輪環丨2的旋轉範圍越大。而 本發明便是將第一導溝112設置在支架11上，使第一導溝 Π2有充足的空間延伸，以增加齒輪環12的旋轉範圍。在 —實施例中，齒輪環12之旋轉範圍實質上為1〇〇度。 100105712 連接件14穿過第一導溝π2後，進一步與至少一葉片 表單編號A0101 第9頁/共26頁 1002009799- [0022] 201235771 13(第一葉片13A及第二葉片13B)連接。如此，當連接件 14沿著第一導溝112移動時，可帶動第一葉片13A及第二 葉片1 3B擺動。詳細地說，連接件^ 4透過伸入第一葉片 13A之第二導溝132及第二葉片13B之第二導溝132中，來 跟第一葉片13A及第二葉片13B連接。連接件14可同時在 第一葉片13A及第二葉片13B之第二導溝132中移動，並 迫使第一葉片13A及第二葉片13B擺動。 [0023] [0024] [0025] 第7圖及第8圖所示，由於連接件14至第一葉片13八的 轉軸131及至第二葉片13B的轉軸131的距離不同，第― 葉片13A與第二葉片13B的旋轉（擺動）範圍也會不一樣。 在一實施例中，齒輪環12的旋轉範圍約為100度時，第一 葉片13A之旋轉範圍實質上為52度，第二葉片13B之旋轉 耗圍實質上為40. 5度。由於第一葉片13 A及第二葉片13B 之擺動範圍及尺寸均不同，第一葉片13A與第二葉片13β 擺動時，可分別遮蔽光圈孔111的不同部分，藉此提高光 圈孔111的遮蔽率。在一實施例中，光圈孔丨丨i的遮蔽率 可達80% 〇 ：： ：';· ：!:: 由上述可知，葉片13的數量增加時，光圈孔111的遮 蔽率可提尚。所以若光圈孔1Π的遮蔽率需增加時，一第 三葉片（圖未示）可疊置在第二葉片13Β上；或者若光圈孔 111的遮蔽率需減少時，第二葉片13Β可移除，只保留第 一葉片13Α。 驅動模組15可產生旋轉運動，且其旋轉運動量可控 制驅動模組15連接齒輪環12，以驅動齒輪環1 2旋轉而 100105712 表單編號Α0101 使連接件14沿第一導溝丨丨2移動 第10頁/共26頁 以帶動葉片13(第一葉 1002009799-0 201235771 片13A及第二葉片13B)擺動。驅動模組15可控制齒輪環 12的旋轉角度，以控制葉片13的擺動角度，進而調整光 圈扎111的遮蔽率。 [0026] 在一實施例中，驅動模組15可包含一馬達151、—驅 動齒輪152及一雙層齒輪153。馬達151可為可控制馬達 轉軸的旋轉角度的馬達，例如步進馬達或是伺服馬達。 ❹ 驅動齒輪152固定於馬達151 ’以為馬達151驅動而沿馬 達轉軸旋轉。驅動齒輪152及雙層齒輪153均位於支架u 的容置空間114中。雙層齒輪153具有一第一級（齒輪 )1531及一第二級（齒輪）1532，第一綠1531之齒數小於 第二級1 532之齒數。第一級1531伸入支架Π之環狀凹陷 113中，且與齒輪環12的齒121相齧合；第二級1 532則與 驅動齒輪152相齧合。 [0027] ❹ 藉此’馬達151的旋轉動能可透過驅動齒輪152及雙 層齒輪153傳遞至齒輪環12，以使得齒輪環12旋轉，再者 ，由於雙層齒輪153的關係丨:，齒輪環_與驅動齒輪152的 轉速比於一實施例中可達到。因此，於一實施例中 ，當馬達151的最小旋轉角度增量為2〇度時，齒輪環12的 最小旋轉角度增量為1. 82度。將齒輪環12的旋轉範圍 100度除以1.82度，可得知齒輪環12的旋轉範圍可分成 約55段，意味著第一葉片13A及第二葉片13B的擺動範圍 也可分成約55段。換句話說，光圈孔U1的遮蔽率可分成 約55段來調整，遮蔽率的變化增量小，利於細微控制通 過光圈孔111之光量。 [0028] 100105712 值得一提的是，雙層齒輪153的第一級1531及第二級 表單編號A0101 第U頁/共26頁 1002009799-0 201235771 1 532的齒數可以調整，以改變齒輪環12與驅動齒輪152 的轉速比，以因應不同的需求。因此，不會為了增大轉 速比，使驅動齒輪152齒數太少，或使齒輪環12齒型太小 而不易製造。 [0029] [0030] [0031] [0032] 光圈調整裝置1更可包括—蓋板16及一罩體17。蓋板 16固定在支架11的第一側，而齒輪環12位於蓋板16及支 架11之間，且齒輪環12並不需如習知光圈調整裝置9吊掛 在蓋板16上，而是直接容置於具有自潤性之支架丨丨之環 狀凹陷113中。蓋板16可限制齒輪環12的軸向移動，以防 止齒輪環12脫離支架11。 罩體1 7固定於支架11的第二側，而該至少一葉片j 3 、驅動齒輪152及雙層齒輪153都位於罩體17及支架丨丨之 間，馬達1 51則固定於罩體1 7的外緣面上。罩體1 7可限制 葉片13的轴向移動’以防止葉片13脫離支架u。 上述為該光圈調整裝置1的說明，該光圈調整裝置^ 具有至少一下述特點： 1. 齒輪環12上無導溝及掛軸，因此齒輪環12的尺寸較 小、重量較輕，使得齒輪環12的驅動扭力減少。此 外齒輪環12易於加工製造，所以生產成本較低。 2. 支架11可提供較大的面積供第一導溝112延伸，以 增加齒輪環12及葉片13的旋轉範圍，進而增加光圈 孔111的遮蔽率。 3. 支架11可為塑膠，因此可藉由射出成形等方式來製 作出’以降低生產成本。此外，支架1 1可具有自潤 100105712 表單編號A0101 第12頁/共26頁 1002009799-0 201235771 [0033] Ο [0034] [0035] [0036] G [0037] [0038] [0039] [0040] 100105712 性，無需外加潤滑油即可讓齒輪環12及葉片ΐ3易於 旋轉，以降低驅動扭力。 •雙層齒輪153可大幅增加驅動齒輪π〗與齒輪環I〗的 轉速比，以增加調整光圈孔111遮蔽率的段數。 5·第—葉片13Α及第二葉片13Β (或更多葉片13)分別 遮蔽光圈孔111的不同部分，以增加光圈孔lu的遮 蔽率。 上述之實施例僅用來例舉本發明之實施態樣，以及 闡釋本發明之技術特徵，並非用來限制本發明之保護範 嘴。任何熟悉此技術者可輕易完成之改變或均等性之安 排均屬於本發明所主張之範圍，本發明之權利保護範圍 應以申請專利範圍為準。 【圖式簡單說明】 第1圖為習知的光圈調整裝置的組合圖。 第2圖為習知的光圈調整裝置的分解圖。 第3圖為本發明的光圈調整裝置的較佳實施例的組合圖。 第4圖為本發明的光圈調整裝置的較佳實施例的分解圖》 第5圖為本發明的光圈調整裝置的較佳實施例的另一分解 圖。 第6圖為本發明的光圈調整裝置的較佳實施例的部分元件 的組合圖。 第7圖為本發明的光圈調整裝置的較佳實施例的光圈最小 的示意圖。 表單編號A0101 第13頁/共26頁 1002009799-0 201235771 [0041] 第8圖為本發明的光圈調整裝置的較佳實施例的光圈最大 的示意圖。 【主要元件符號說明】 [0042] [本發明] [0043] 1光圈調整裝置 [0044] 11 支架 [0045] 111 光圈孔 [0046] 112 第一導溝 [0047] 113 環狀凹陷 [0048] 114 容置空間 [0049] 115 肋部 [0050] 116 凸點 [0051] 12 齒輪環 [0052] 121 齒 [0053] 122 旋轉軸線 [0054] 13 葉片 [0055] 13A 第一葉片 [0056] 13B 第二葉片 [0057] 131 轉軸 [0058] 132 第二導溝 表單編號A0101 100105712 第14頁/共26頁 1002009799-0 201235771 Ο ❹ [0059] 14 連接件 [0060] 15 驅動模組 [0061] 151 馬達 [0062] 152 驅動齒輪 [0063] 153 雙層齒輪 [0064] 1531第一級 [0065] 1532第二級 [0066] 16 蓋板 [0067] 17 罩體 [0068] [習知] [0069] 9光圈調整裝置 [0070] 91 框體 [0071] 911 光圈孔 [0072] 92 齒輪環 [0073] 921 導溝 [0074] 922 掛軸 [0075] 93 葉片 [0076] 931 凸柱 [0077] 94 步進馬達 100105712 表單編號Α0101 第15頁/共26頁 1002009799-0 201235771 [0078] 941驅動齒輪 [0079 ] 9 5 蓋板 [0080 ] 951 滑溝 100105712 表單編號 A0101 第 16 頁/共 26 頁 1002009799-0The second blade 13 is swingably disposed on the second side of the bracket 11, and the rotating shaft 131 and the second guiding groove 13 are disposed substantially on both sides of the diaphragm hole 111 in the radial direction. The first blade 13 Α and the second blade 13 摆动 are respectively swung relative to the bracket 11 along the rotating shaft 131 and the extending direction of the second guiding groove 132 passes through the rotation axis 122 of the gear ring 12 (or the axis of the aperture ill). It is avoided that the connecting member 14 interferes when the first blade 13 and the second blade 13 are driven. Further, 'the second guide groove 132 partially overlaps the first guide groove 112 from the axial direction of the aperture hole 111; and as the swing angle of the first blade is a and the second blade 13B ❹ [0020] changes, the aperture The area (shadowing rate) at which the holes 111 are shielded may vary. The blade 13 (the first blade 13A and the second blade 13B) may be made of metal (for example, copper) because the bracket 丨丨 is preferably made of a self-lubricating material, so that no lubricating oil is needed, Smoothly rotate relative to the bracket 丨j. [0021] The connecting member 14 can be a cylinder and fixed to the gear ring 12 to rotate with the gear ring 12, the connecting member n passes through the first guiding groove 12, when the gear ring 12 rotates, The connector 14 moves along the first guide groove 112. As shown in Figures 7 and 8, when the connector 14 is moved to the end of the first guide groove 112, the gear ring 12 will not continue to rotate. It can be seen that the length of the first guide groove 可 can limit the range of rotation of the gear ring 12, and the length of the first guide groove 112 (the distance between the two ends) is larger, and the range of rotation of the gear ring 丨 2 is larger. In the present invention, the first guide groove 112 is disposed on the bracket 11 so that the first guide groove 有2 has sufficient space to extend to increase the range of rotation of the gear ring 12. In the embodiment, the range of rotation of the gear ring 12 is substantially 1 degree. 100105712 After the connecting member 14 passes through the first guiding groove π2, it is further connected with at least one blade form number A0101, page 9 / page 26, 1002009799 - [0022] 201235771 13 (first blade 13A and second blade 13B). Thus, when the connecting member 14 moves along the first guiding groove 112, the first blade 13A and the second blade 13B can be swung. In detail, the connecting member 4 is connected to the first vane 13A and the second vane 13B through the second guide groove 132 of the first vane 13A and the second guide groove 132 of the second vane 13B. The connecting member 14 is simultaneously movable in the second guide grooves 132 of the first vane 13A and the second vane 13B, and forces the first vane 13A and the second vane 13B to swing. [0025] [0025] As shown in FIGS. 7 and 8, the distance between the connecting member 14 to the first shaft 13 and the rotating shaft 131 of the second blade 13B is different, and the first blade 13A and the first The range of rotation (swing) of the two blades 13B will also be different. 5度。 In one embodiment, the rotation of the first ring 13A is substantially 52 degrees, the rotation of the second blade 13B is substantially 40.5 degrees. Since the swing range and size of the first blade 13 A and the second blade 13B are different, when the first blade 13A and the second blade 13β are swung, different portions of the aperture hole 111 can be shielded, thereby increasing the shielding rate of the aperture 111. . In an embodiment, the aperture ratio of the aperture aperture 丨丨i can be up to 80% 〇 :: : '; · ::: From the above, it can be seen that when the number of the blades 13 is increased, the shielding rate of the aperture hole 111 can be improved. Therefore, if the shielding rate of the aperture hole 1Π needs to be increased, a third blade (not shown) may be stacked on the second blade 13Β; or if the shielding rate of the aperture hole 111 needs to be reduced, the second blade 13Β may be removed. Only the first blade 13Α is retained. The driving module 15 can generate a rotating motion, and the amount of the rotating motion can control the driving module 15 to connect the gear ring 12 to drive the gear ring 12 to rotate and the 100105712 form number Α 0101 to move the connecting member 14 along the first guiding groove 丨丨 2 10 pages/26 pages are used to drive the blades 13 (the first leaf 1002009799-0 201235771 piece 13A and the second blade 13B) to swing. The driving module 15 can control the rotation angle of the gear ring 12 to control the swinging angle of the blade 13, thereby adjusting the shielding rate of the diaphragm 111. In an embodiment, the drive module 15 can include a motor 151, a drive gear 152, and a double gear 153. The motor 151 can be a motor that can control the angle of rotation of the motor shaft, such as a stepper motor or a servo motor. ❹ The drive gear 152 is fixed to the motor 151' to drive the motor 151 to rotate along the motor shaft. The drive gear 152 and the double-layer gear 153 are both located in the accommodating space 114 of the bracket u. The double-layer gear 153 has a first stage (gear) 1531 and a second stage (gear) 1532, and the number of teeth of the first green 1531 is smaller than the number of teeth of the second stage 1 532. The first stage 1531 extends into the annular recess 113 of the bracket and engages the teeth 121 of the gear ring 12; the second stage 1 532 engages the drive gear 152. [0027] Thereby, the rotational kinetic energy of the 'motor 151' can be transmitted to the gear ring 12 through the drive gear 152 and the double-layer gear 153 to rotate the gear ring 12, and further, due to the relationship of the double-layer gear 153, the gear ring The ratio of the rotational speed of the drive gear 152 to that of the drive gear 152 is achievable in one embodiment. Therefore, in an embodiment, when the minimum rotation angle increment of the motor 151 is 2 degrees, the minimum rotation angle increment of the gear ring 12 is 1.82 degrees. By dividing the range of rotation of the gear ring 12 by 100 degrees by 1.82 degrees, it is understood that the range of rotation of the gear ring 12 can be divided into about 55 segments, meaning that the swing range of the first blade 13A and the second blade 13B can also be divided into about 55 segments. In other words, the shielding rate of the aperture hole U1 can be adjusted by dividing into about 55 segments, and the variation of the shielding rate is small, which is advantageous for finely controlling the amount of light passing through the aperture hole 111. [0028] 100105712 It is worth mentioning that the number of teeth of the first stage 1531 and the second stage form number A0101 of the double-layer gear 153 can be adjusted to change the gear ring 12 and the number of teeth of the first stage 1531 and the second stage form number A0101 The speed ratio of the drive gear 152 is adapted to different needs. Therefore, in order to increase the speed ratio, the number of teeth of the drive gear 152 is too small, or the gear ring 12 is too small in size to be easily manufactured. [0032] [0032] The aperture adjusting device 1 may further include a cover plate 16 and a cover body 17. The cover plate 16 is fixed on the first side of the bracket 11, and the gear ring 12 is located between the cover plate 16 and the bracket 11, and the gear ring 12 does not need to be hung on the cover plate 16 as in the conventional aperture adjustment device 9, but It is directly placed in the annular recess 113 of the self-lubricating stent. The cover plate 16 limits the axial movement of the gear ring 12 to prevent the gear ring 12 from disengaging from the bracket 11. The cover body 17 is fixed to the second side of the bracket 11, and the at least one blade j 3 , the drive gear 152 and the double-layer gear 153 are located between the cover body 17 and the bracket ,, and the motor 1 51 is fixed to the cover body 1 7 on the outer edge. The cover 1 7 can limit the axial movement of the blade 13 to prevent the blade 13 from coming off the bracket u. The above is the description of the aperture adjusting device 1. The aperture adjusting device has at least one of the following features: 1. The gear ring 12 has no guide groove and a hanging shaft, so the gear ring 12 has a small size and a light weight, so that the gear ring 12 The drive torque is reduced. The outer gear ring 12 is easy to manufacture and therefore has a low production cost. 2. The bracket 11 can provide a larger area for the first guide groove 112 to extend to increase the range of rotation of the gear ring 12 and the blade 13, thereby increasing the shielding rate of the aperture 111. 3. The bracket 11 can be made of plastic, so it can be made by injection molding or the like to reduce the production cost. In addition, the bracket 1 1 may have a self-lubricating 100105712 Form No. A0101 Page 12 / Total 26 Page 1002009799-0 201235771 [0033] [0036] [0036] [0038] [0040] [0040] 100105712 Sex, the gear ring 12 and the blade ΐ3 can be easily rotated without the need for external lubrication to reduce the driving torque. • The double-layer gear 153 can greatly increase the rotational speed ratio of the drive gear π 〗 and the gear ring I to increase the number of segments for adjusting the shielding rate of the aperture hole 111. 5. The first blade 13Α and the second blade 13Β (or more blades 13) respectively shield different portions of the aperture hole 111 to increase the shielding rate of the aperture hole lu. The embodiments described above are only intended to illustrate the embodiments of the present invention, and to explain the technical features of the present invention, and are not intended to limit the protection of the present invention. Any changes or equalities that can be easily accomplished by those skilled in the art are intended to be within the scope of the invention. The scope of the invention should be determined by the scope of the claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a combination diagram of a conventional aperture adjustment device. Fig. 2 is an exploded view of a conventional aperture adjustment device. Figure 3 is a combination view of a preferred embodiment of the aperture adjusting device of the present invention. Fig. 4 is an exploded view of a preferred embodiment of the aperture adjusting device of the present invention. Fig. 5 is another exploded view of the preferred embodiment of the aperture adjusting device of the present invention. Fig. 6 is a combination view showing a part of elements of a preferred embodiment of the aperture adjusting device of the present invention. Fig. 7 is a view showing the minimum aperture of the preferred embodiment of the aperture adjusting device of the present invention. Form No. A0101 Page 13 of 26 1002009799-0 201235771 [0041] Fig. 8 is a schematic view showing the largest aperture of the preferred embodiment of the aperture adjusting device of the present invention. [Main component symbol description] [0042] [Invention] [0043] 1 aperture adjustment device [0044] 11 bracket [0045] 111 aperture aperture [0046] 112 first guide groove [0047] 113 annular recess [0048] 114 Accommodating space [0049] 115 rib [0050] 116 bump [0051] 12 gear ring [0052] 121 tooth [0053] 122 axis of rotation [0054] 13 blade [0055] 13A first blade [0056] 13B second Blade [0057] 131 Spindle [0058] 132 Second Guide Groove Form No. A0101 100105712 Page 14 of 26 1002009799-0 201235771 Ο ❹ [0059] 14 Connector [0060] 15 Drive Module [0061] 151 Motor [ 0062] 152 Drive gear [0063] 153 Double-layer gear [0064] 1531 First stage [0065] 1532 Second stage [0066] 16 Cover [0067] 17 Cover [0068] [Practical] [0069] 9 aperture Adjustment device [0070] 91 frame [0071] 911 aperture hole [0072] 92 gear ring [0073] 921 guide groove [0074] 922 hanging shaft [0075] 93 blade [0076] 931 boss [0077] 94 stepper motor 100105712 Form No. 1010101 Page 15 of 26 1002009799-0 201235771 [0078] 941 drive gear [0079] 9 5 Cover [0080] 9 51 Chute 100105712 Form No. A0101 Page 16 of 26 1002009799-0