M300511 八、新型說明： 【新型所屬之技術領域】 本創作係提供一種雙捲簾結構，尤指一種可適時調 節透光度的捲收式窗簾。 【先前技術】 市面上常見的捲簾係如公告第165270號「制動式捲 簾結構改良」、公告第308851號「捲簾式珠簾結構改良」 等新型案揭示者，包含樞接於兩側架之間的一捲筒、一 端結合在該捲筒上之布簾及安裝在該捲筒内之一捲收裝 置與一制動裝置；當將布簾往下捲放到一位置後，該制 動裝置會使布簾自動形成定位，且當使用者以短促的頓 力進一步將該布簾向下拉動時，該制動裝置會釋放對到 該布簾的定位，而該捲收裝置之彈簧的彈力會使布簾自 動往上捲收，在布簾之放下與收上的使用上相當便利。 上述習用捲簾結構雖然具有操作便利的優點，但是 在透光性上無法做調解。因而，習用也有可調整透光性 的捲簾產生，如新型專利M261152號「捲簾結構」揭示 者，該捲簾包含一樞接於兩托板之間的捲轴，該捲軸可 將一布簾往上捲收或是往下捲放，且該布簾係概呈U形 彎摺地包含一前布簾與一後布簾，並在該布簾上設有複 數相間隔之透光區與遮蔽區，當前布簾上的透光區與後 布簾上的遮蔽區相對時，該布簾就可遮蔽陽光，而當前 M300511 布簾上的透光區與後布簾上的透光區相對時，該布簾就 可透光。 將一布簾設呈u形彎摺地的習用捲簾結構，雖然具 有可調整布簾透光性的優點。但是在使用上並不便利， 亦即，該種結構的布簾不具自動放下定位及自動回彈收 上的操作性，此外，在布簾上設置複數相間隔之透光區 與遮蔽區的製造也較為麻煩。 【新型内容】 本創作者有鑑於此，遂悉心加以研究設計，於今有 本創作產生。緣此，本創作之主要目的在提供一種雙捲 簾結構，其係將兩組捲簾整合地設在一對托架之間，且 可經由同一操控機構來個別控制該二組捲簾之布簾的升 降，達成可任意調節整個捲簾的透光度，並具有操作便 利之效果者。 本創作為達上述目的及其它效果的具體結構及技術 手段，係包含一第一托架、一第二托架、安裝在該第一 托架内的一操控機構及可轉動地安裝在該二托架之間的 第一捲簾組與第二捲簾組；其中，該操控機構包含一第 一輪與一第二輪，該第一輪與第二輪係個別且互成反向 地驅動第一捲簾組之捲筒及第二捲簾組之捲筒轉動，而 第一捲簾組及第二捲簾組的布簾係分別由大致上透光及 大致上較不透光的布料製成，達成使用者可藉由控制該M300511 VIII. New description: [New technical field] The creation system provides a double roller blind structure, especially a retractable curtain that can adjust the transmittance at the right time. [Prior Art] Roller curtains commonly used in the market are disclosed in the new case of Bulletin No. 165270 "Improvement of Brake Roller Structure", Announcement No. 308851 "Improvement of Rolling Curtain Curtain Structure", including pivoting on both sides a reel between the racks, a curtain coupled to the reel at one end, and a retracting device and a braking device mounted in the reel; the brake is applied when the curtain is rolled down to a position The device automatically positions the curtain, and when the user further pulls the curtain downward with a short force, the brake device releases the positioning to the curtain, and the spring force of the winding device It will make the curtain automatically roll up, which is quite convenient for the laying and closing of the curtain. Although the conventional roller blind structure described above has the advantage of being convenient to operate, it cannot be adjusted in terms of light transmittance. Therefore, there is also a roller blind which can be adjusted for light transmission, as disclosed in the novel "Roller Structure" of the patent No. M261152, which comprises a reel pivotally connected between two pallets, the reel can be a cloth The curtain is wound up or down, and the curtain comprises a front curtain and a rear curtain in a U-bend, and a plurality of spaced-apart light-transmitting regions are arranged on the curtain. In the shaded area, when the light transmission area on the current curtain is opposite to the shadow area on the rear curtain, the curtain can shield the sunlight, and the light transmission area on the current M300511 curtain and the light transmission area on the rear curtain In contrast, the curtain can transmit light. A conventional roller blind structure in which a curtain is bent in a u-shape has an advantage of being able to adjust the transparency of the curtain. However, it is not convenient to use, that is, the curtain of the structure does not have the operability of automatically lowering the positioning and automatically rebounding, and further, manufacturing the plurality of spaced-apart light-transmitting areas and the shielding area on the curtain It is also more troublesome. [New content] In view of this, the creator has carefully studied and designed the original creation. Therefore, the main purpose of the present invention is to provide a double roller blind structure in which two sets of roller blinds are integrally disposed between a pair of brackets, and the two sets of roller blind fabrics can be individually controlled via the same steering mechanism. The lifting and lowering of the curtain can achieve the effect of arbitrarily adjusting the transmittance of the entire roller blind, and has the effect of being convenient to operate. The specific structure and technical means for achieving the above purpose and other effects include a first bracket, a second bracket, a steering mechanism mounted in the first bracket, and rotatably mounted on the second bracket a first roller blind group and a second roller blind group between the brackets; wherein the steering mechanism includes a first wheel and a second wheel, the first wheel and the second wheel train are individually and oppositely driven The reel of the first roller blind group and the reel of the second roller blind group rotate, and the curtains of the first roller blind group and the second roller blind group respectively are made of cloth substantially transparent and substantially opaque Made, the user can control the
M300511 =簾組之布簾位置以調節整個捲簾的透光度並具有 刼作便利的效果者。 上述第-托料第二域最好聽合在—切 兩端。 關於本創作之其他目的、優點及特徵，將可由以下 較佳實施例的詳細朗並參照所_式來了解。 【實施方式】 本創作可有多種不_結構實_。現將僅為例子 但非用以限制的—具體實施例’並參照所關式就本創 作之較佳結構内容說明如下： 第一圖顯示本創作該雙捲簾結構一實施例的元件分 解圖第—圖顯示第—圖的—組合剖示圖；如圖中所示， 依據本創作構成的雙捲簾結構包含一第一托架丨、一第 托木2 女裝在弟一托架1内的操控機構3及可轉 動地t裝在该二托架之間的一第一捲簾組41(下捲簾組） 與一第二捲簾組42(上捲簾組）；其中，該二捲簾組的 結構大致上相同，並係屬習用技術，概略說明如下（相 同元件將附上同一標號做說明）。 第一捲簾組41與第二捲簾組42係概呈相對隔開地 配置在該二托架1、2之間，並個別包含一捲筒43，各 捲筒43上捲繞一可用以遮蔽陽光的布簾411、421，其 中，該第一布簾411係由大致上透光或半透光的布料或 7 M300511 其它類似性質材料製成，而第二布簾421係由大致上較 不透光的布料或其它類似性質材料製成；配合第三圖所 示，在本實施例中，第一布簾411係逆時鐘方向繞在其 捲筒43上，而第二布簾421係順時鐘方向繞在其捲筒 43上；另在各布簾的自由端（外端）上結合一端桿46。 配合第二圖至第四圖所示，在各捲筒43的兩侧分別 套裝有概呈軸筒狀的第一端蓋44及第二端蓋45用以個 別地樞接在上述托架1、2上（以下說明），各端蓋外表 面與各捲筒43的内部分別設有沿徑向伸出的突條441、 45卜431，使得捲筒43會與所結合的端蓋一起轉動；又 在各捲筒43内部具有一捲收裝置47與一制動裝置48， 在本實施例中，各制動裝置48係安裝在一對應的端蓋 45内部，用以使相關連之布簾往下捲放到達停止的位置 後會自動形成定位，而各捲收裝置47係包含一可相對該 捲筒43旋轉之心軸471及捲繞在該心軸上的彈簧472， 於各心軸471的一端具有概呈方狀的套接部473，當使 用者藉由短促的頓力向下拉動例如珠鏈的操作件時，制 動裝置48就會釋放對到該捲筒的定位，且位在該捲筒内 之捲收裝置47的彈簧472就會藉由儲存的彈力使得布簾 自動往上捲收。 本創作的特徵，係在將該二組捲簾組41、42整合地 設置在第一托架1與第二托架2之間，而且藉由該操控 M300511 機構3的設計使得該二捲簾組41、42之布簾411、421 能夠單獨控制升降以便利調節整個捲簾的透光度。 如第一圖、第二圖所示，該第一托架1與第二托架2 係結合在一支撐架5的兩端，該支撐架5係可固定在牆 壁或天花板上（圖中未示），使得該第一托架1與第二 托架2能相隔開地被固定。 配合第一圖、第五圖所示，第一托架1包含一托板 11及可與該托板11相對結合的殼體12,該殼體12内具 有分隔開的上、下收納室122、121，而在該托板11的 内面延伸出可對應穿入該二收納室的上、下銷桿111， 各銷桿的中央並穿插有一可轉動的調整元件112 (如第 三圖所示），該調整元件之内端具有方形孔113,該孔 113可提供上述心軸的方狀套接部473對應套合，使得 以工具插入該調整元件112外側面的一字槽孔114内轉 動，就能調整彈簧472的扭緊彈力，進而調整各布簾自 動往上捲收的彈力。 第二托架2包含一托板21，該托板21的内面延伸出 分隔開的上、下樞接部211，各樞接部211係可提供上 述一對應的端蓋45套合以形成可做相對轉動的樞接，並 在各柩接部211的中央穿插一可轉動的調整元件212, 該調整元件212係一概呈方狀的桿，其可提供上述一對 應之制動裝置48的軸桿481 —端對應套合，使得以工具 M300511 插入該調整元件212外側面的一字槽孔（圖中未示）内 轉動，將能調整相關連之布簾往上捲收後的位置（習用 技術，不再詳述）。 操控機構3包含可裝入殼體下收納室121的第一輪 31、可裝入上收納室122的第二輪32、嚙合在該二輪之 間的至少一傳動輪33及個別套裝在二輪之中心孔310、 320内的上、下轴筒35 ;其中，該第一輪31周緣具有一 環槽311，該環槽311内套入一珠鏈34 (或繩索），當 拉動該珠鏈34時將能驅動該第一輪31旋轉，又該第一 輪與第二輪的一端面分別具有形成環狀的齒部312、321 用以和傳動輪33形成嚙合，如第六圖所示，使得珠鏈 34拉動第一輪31轉動時，第二輪32也會被帶動。 配合第三圖、第七圖所示，上、下轴筒35係個別地 套在上、下銷桿111外部而形成可轉動地樞接，且各軸 筒35具有一伸出殼體12外的外端部351及一位在殼體 内的内端部352，各外端部351係可提供一對應的端蓋 44套合，並利用該外端部351上的凸肋353與該端蓋44 的卡合，使得第一捲簾組41之捲筒43兩端分別樞接在 下軸桿111與下樞接部211上，而第二捲簾組42之捲筒 4 3兩端分別柩接在上轴桿111與上柩接部211處’因而’ 當一軸筒35轉動時，與該轴筒35相套合的端蓋就會帶 動一捲筒43轉動。 10 M300511 參閱第五圖、第六圖所示，在各軸筒35的内端部352 上並裝設一單向傳動裝置36，使得各轴筒只在單向受所 套裝的輪31、32帶動，亦即，當第一輪31與第二輪32 以順時鐘或是逆時鐘轉動時，套裝在各輪上的軸筒35只 會在其中一向受帶動；在本實施例中，該單向傳動裝置 36係一繞呈環圈狀的彈簧，各彈簧具有突出一端361， 並在各輪中心孔310、320的内周緣設有可和各突出一端 361接觸的帶動塊313、322，當各端361被相關連的帶 動塊推往拉緊方向（束緊轴筒35方向）時，轴筒35就 會隨著相穿套的輪轉動，進而帶動相關連的捲筒轉動， 而如果各端361被相關連的帶動塊推往拉開方向時，該 套在轴筒35上的彈簧36就會形成空轉，使得軸筒不會 隨著相穿套的輪轉動，因而，與該軸筒結合的捲筒就不 會轉動。 上述套在各轴筒内端部352的二彈簧36並設成彼此 相反的捲繞方向，亦即，以突出一端361為基準點，其 中一彈簧係呈順時鐘捲繞，而另一彈簧係呈逆時鐘捲繞 (如第五圖所示）；藉此，當珠鏈34拉動第一輪31與 第二輪32做同一方向的轉動時，將只有一軸筒35會受 帶動，因而只有其中一捲筒43會受連動。 依據本創作形成之雙捲簾結構在實施上，如第六 圖、第八圖所示，當以逆時鐘方向向下拉動珠鏈34 —邊 M300511 (圖中左側邊）時，第一輪31與第二輪32將被帶動一 同往逆時鐘方向轉動，而因安裝在第二輪32内的彈簧 36係與位在第一輪31内的彈簧36為反方向的捲繞，所 以，只有第一輪31内的軸筒35會被帶動旋轉（第二輪 32内的轴筒35因套在其上的彈簧35會空轉而不轉動）; 從而，第一組捲簾41的捲筒43會帶動第一布簾411向 下捲放，並在使用者放開拉力後，該第一組捲簾41内的 制動裝置48會將該第一布簾411定位在該想要的位置； 此外，當以短促的頓力且逆時鐘方向向下拉動該珠鏈34 時，該第一組捲簾41内之捲收裝置47的彈簧彈力將會 使該布簾411自動往上捲收。 同樣，當以順時鐘方向向下拉動珠鍵3 4 —邊（圖中 右側邊）時，如第九圖所示，第一輪31與第二輪32將 被帶動一同往順時鐘方向轉動，使得第二輪32内的軸筒 35會被帶動旋轉（第一輪32内的轴筒35因套在其上的 彈簧35會空轉而不轉動）；從而，第二組捲簾42的捲 筒43會帶動第二布簾421向下捲放，並在使用者放開拉 力後，該第二組捲簾42内的制動裝置48會將該第二布 簾421定位在該想要的位置上；此外，當以短促的頓力 且順時鐘方向向下拉動該珠鏈34時，該第二組捲簾41 内之捲收裝置47的彈簧彈力將會使該布簾421自動往上 捲收。 12 M3 00511 依據本創作形成之雙捲簾結構將能提供任意調節整 個捲簾透光度的效果’亦即，使用者可以任意操作珠鍵 34以個別控制該二組捲簾之布簾411、421的升降，例 如，在夜間時可將大致上透光或半透光的第一布簾4ιι 放下，並將較不透光的第二布簾421捲收，而在日間時 將再將該較不透光的第二布簾421放下，並將第一布簾 411捲收（也可不捲收），故本創作已能達成預期的設 計目的與實施效果。 在前述說明書中，本創作僅是就某些特定實施例做 描述，而依本創作的設計特徵將可做多種變化或修改是 可了解的，例如，本創作之第一組捲簾41與第二組捲簾 4 2的結構係可錢用其它f赌構來㈣。故對於熟悉 此項技藝人士可作之明顯替換與修改，仍將併入於本創 作所主張的專利範圍内。 【圖式簡單說明】 卓圖係本創作一實施例的元件分解圖； 第二圖顯示第一圖的一組合剖視圖 第二圖係沿第二圖之3—3位置所取的剖視圖； 第四圖係第二圖之二簾筒的内部結構立體圖； 係H第—托架與操控機構的分解圖； 第六圖係第一圖的一組合示意圖； 第七圖係沿第六圖之7-7位置所取的剖視圖； 13 M300511 第八圖係與第三圖相同的剖視圖，並顯示拉動珠鏈使第 一捲簾的布簾捲放的實施情況；及 第九圖係與第六圖相同的平面圖，並顯示拉動珠鏈使第 二捲簾的布簾捲放的實施情況。 【主要元件符號說明】M300511 = Curtain position of the curtain set to adjust the transparency of the entire roller blind and has a convenient effect. Preferably, the second field of the first-feed material is plucked at both ends. Other objects, advantages and features of the present invention will be apparent from the following detailed description of the preferred embodiments. [Embodiment] This creation can have a variety of non-structural real_. The preferred structural content of the present invention will be described as an example only, but not by way of limitation, with reference to the accompanying drawings. The first figure shows an exploded view of an embodiment of the dual roller blind structure of the present invention. The first figure shows the combination diagram of the first figure; as shown in the figure, the double roller blind structure constructed according to the present invention comprises a first bracket 丨, a first tray 2, a woman in a tray 1 a control mechanism 3 and a first roller blind set 41 (lower roller blind set) and a second roller blind set 42 (upper roller blind set) rotatably mounted between the two brackets; The structure of the two roller blind sets is substantially the same, and is a conventional technique, and the following is a brief description (the same components will be denoted by the same reference numerals). The first roller blind group 41 and the second roller blind group 42 are disposed between the two brackets 1 and 2 so as to be spaced apart from each other, and individually include a reel 43, and each reel 43 is wound around for use. a shaded curtain 411, 421, wherein the first curtain 411 is made of a substantially light transmissive or semi-transmissive cloth or 7 M300511 other similar material, and the second curtain 421 is substantially An opaque cloth or other similar material; as shown in the third figure, in the present embodiment, the first curtain 411 is wound on the reel 43 in a counterclockwise direction, and the second curtain 421 is attached. It is wound on its reel 43 in a clockwise direction; another end rod 46 is joined to the free end (outer end) of each curtain. As shown in the second to fourth figures, a first end cap 44 and a second end cap 45, which are substantially cylindrical, are respectively disposed on both sides of each reel 43 for individually pivoting on the bracket 1 2 (described below), the outer surface of each end cap and the inner portion of each reel 43 are respectively provided with protrusions 441, 45 431 extending in the radial direction, so that the reel 43 will rotate together with the combined end cover There is also a retracting device 47 and a braking device 48 inside each reel 43. In this embodiment, each braking device 48 is mounted inside a corresponding end cap 45 for the associated curtain to After the lower winding reaches the stopped position, the positioning is automatically formed, and each winding device 47 includes a spindle 471 that is rotatable relative to the spool 43 and a spring 472 wound around the spindle, on each of the spindles 471. One end has a substantially square sleeve portion 473. When the user pulls down the operating member such as the bead chain by a short force, the braking device 48 releases the positioning to the reel and is located at The spring 472 of the retracting device 47 in the reel automatically retracts the curtain by the stored elastic force. The feature of the present invention is that the two sets of roller blind sets 41, 42 are integrally disposed between the first bracket 1 and the second bracket 2, and the two roller blinds are designed by the design of the mechanism M300511 mechanism 3. The curtains 411, 421 of the groups 41, 42 can be individually controlled for lifting to facilitate adjustment of the transparency of the entire roller blind. As shown in the first figure and the second figure, the first bracket 1 and the second bracket 2 are coupled to one end of a support frame 5, and the support frame 5 can be fixed on a wall or a ceiling (not shown) The first bracket 1 and the second bracket 2 are fixed apart from each other. As shown in the first and fifth figures, the first bracket 1 includes a bracket 11 and a housing 12 that can be coupled to the bracket 11 . The housing 12 has spaced upper and lower storage compartments. 122, 121, on the inner surface of the pallet 11 extending corresponding to the upper and lower pins 111 of the two storage chambers, the center of each pin is inserted with a rotatable adjusting element 112 (such as the third figure The inner end of the adjusting component has a square hole 113, and the hole 113 can provide a corresponding sleeve of the square sleeve 473 of the mandrel so as to be inserted into the slot 114 of the outer side of the adjusting component 112 by a tool. By rotating, the torsional spring force of the spring 472 can be adjusted, and the elastic force of each of the curtains automatically being rolled up can be adjusted. The second bracket 2 includes a supporting plate 21, and the inner surface of the supporting plate 21 extends from the upper and lower pivoting portions 211. The pivoting portions 211 can provide the corresponding end caps 45 to form the same. A pivoting relative rotation is possible, and a rotatable adjusting component 212 is inserted in the center of each of the splicing portions 211. The adjusting component 212 is a substantially square rod which can provide the shaft of the corresponding braking device 48. The end of the rod 481 is correspondingly engaged, so that the tool M300511 is inserted into the slot of the outer side of the adjusting component 212 (not shown), and the position of the associated curtain can be adjusted to be retracted. Technology, no longer detailed). The steering mechanism 3 includes a first wheel 31 that can be inserted into the lower housing compartment 121, a second wheel 32 that can be loaded into the upper storage compartment 122, at least one transmission wheel 33 that is engaged between the two wheels, and an individual set in the second wheel. The upper and lower shaft cylinders 35 of the central hole 310, 320; wherein the circumference of the first wheel 31 has a ring groove 311, and a ring chain 34 (or rope) is nested in the ring groove 311, when the bead chain 34 is pulled. The first wheel 31 can be driven to rotate, and the end faces of the first wheel and the second wheel respectively have annular teeth 312, 321 formed to engage with the transmission wheel 33, as shown in the sixth figure, When the bead chain 34 pulls the first wheel 31 to rotate, the second wheel 32 is also driven. As shown in the third and seventh figures, the upper and lower shaft cylinders 35 are individually sleeved on the outside of the upper and lower pins 111 to be rotatably pivoted, and each of the shaft cylinders 35 has an outer portion of the housing 12 The outer end portion 351 and one inner end portion 352 in the housing, each outer end portion 351 can provide a corresponding end cap 44, and the rib 353 on the outer end portion 351 and the end cap The two ends of the reel 43 of the first roller blind group 41 are respectively pivotally connected to the lower shaft 111 and the lower pivoting portion 211, and the two ends of the reel 4 3 of the second roller blind group 42 are respectively connected. At the upper shaft 111 and the upper splicing portion 211, when the shaft cylinder 35 is rotated, the end cap that is engaged with the shaft cylinder 35 drives a reel 43 to rotate. 10 M300511 Referring to the fifth and sixth figures, a one-way transmission 36 is mounted on the inner end portion 352 of each of the shaft cylinders 35 so that the shaft cylinders receive the wheels 31, 32 only in one direction. Driven, that is, when the first wheel 31 and the second wheel 32 are rotated clockwise or counterclockwise, the barrel 35 sleeved on each wheel is only driven in one direction; in this embodiment, the single The transmission device 36 is wound around a ring-shaped spring, each spring has a protruding end 361, and at the inner circumference of each of the wheel center holes 310, 320 is provided a driving block 313, 322 which can contact each protruding end 361, when When the end 361 is pushed by the associated driving block to the tightening direction (the direction of the tightening barrel 35), the barrel 35 rotates with the wheel of the passing sleeve, thereby driving the associated reel to rotate, and if When the end 361 is pushed into the pulling direction by the associated driving block, the spring 36 of the sleeve on the barrel 35 will be idling, so that the shaft does not rotate with the wheel of the penetrating sleeve, and thus the shaft barrel The combined reel does not rotate. The two springs 36 which are sleeved on the inner ends 352 of the respective barrels are arranged in opposite winding directions, that is, with the protruding end 361 as a reference point, wherein one spring is wound clockwise and the other spring is Compressed in an inverse clock (as shown in the fifth figure); thereby, when the bead chain 34 pulls the first wheel 31 and the second wheel 32 to rotate in the same direction, only one of the shaft cylinders 35 will be driven, and thus only A reel 43 will be linked. According to the creation of the double roller blind structure, as shown in the sixth and eighth figures, when the bead chain 34 is pulled downward in the counterclockwise direction M300511 (the left side in the figure), the first wheel 31 The second wheel 32 will be driven to rotate in the counterclockwise direction, and since the spring 36 mounted in the second wheel 32 is wound in the opposite direction from the spring 36 located in the first wheel 31, only the first The shaft cylinder 35 in one wheel 31 is driven to rotate (the shaft cylinder 35 in the second wheel 32 is idling without being rotated by the spring 35 placed thereon); thus, the reel 43 of the first group of roller blinds 41 will The first curtain 411 is driven to be wound downward, and after the user releases the pulling force, the braking device 48 in the first group of roller blinds 41 positions the first curtain 411 at the desired position; When the bead chain 34 is pulled downward in a short counterforce and counterclockwise, the spring force of the retracting device 47 in the first set of roller blinds 41 will cause the curtain 411 to automatically retract upward. Similarly, when the bead key 3 4 side (the right side in the figure) is pulled downward in the clockwise direction, as shown in the ninth figure, the first wheel 31 and the second wheel 32 will be driven to rotate in the clockwise direction. The shaft cylinder 35 in the second wheel 32 is caused to rotate (the shaft cylinder 35 in the first wheel 32 is idling without rotating due to the spring 35 placed thereon); thus, the reel of the second group of roller blinds 42 43 will drive the second curtain 421 downwardly, and after the user releases the pulling force, the braking device 48 in the second group of roller blinds 42 will position the second curtain 421 at the desired position. In addition, when the bead chain 34 is pulled downward in a clockwise direction with a short counterforce, the spring force of the retracting device 47 in the second group of roller blinds 41 will cause the curtain 421 to automatically roll up. . 12 M3 00511 The double roller blind structure formed according to the present invention can provide the effect of arbitrarily adjusting the transmittance of the entire roller blind. That is, the user can arbitrarily operate the bead key 34 to individually control the two sets of roller blind curtains 411, Lifting and lowering of 421, for example, at the night, the first curtain 4 ιι, which is substantially transparent or semi-transparent, can be lowered, and the second 421, which is less opaque, can be taken up, and will be The second 424, which is less opaque, is lowered, and the first drapes 411 are taken up (or not), so the original design has achieved the intended design and implementation effects. In the foregoing specification, the present invention has been described only in terms of specific embodiments, and various changes or modifications can be made in the design features of the present invention. For example, the first group of shutters 41 and The structure of the two sets of roller blinds 4 2 can be constructed with other f gambling (4). Therefore, obvious substitutions and modifications to those skilled in the art will still be incorporated within the scope of the patent claimed by this creation. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 2 is a cross-sectional view showing an embodiment of the first embodiment; the second drawing is a cross-sectional view taken along line 3-3 of the second figure; Figure 2 is a perspective view of the internal structure of the second curtain; the exploded view of the H-bracket and the steering mechanism; the sixth diagram is a combined schematic view of the first figure; Sectional view taken at position 7; 13 M300511 The eighth diagram is the same cross-sectional view as the third diagram, and shows the implementation of pulling the bead chain to wind the curtain of the first roller blind; and the ninth diagram is the same as the sixth diagram The plan view and the implementation of pulling the bead chain to unwind the curtain of the second roller blind. [Main component symbol description]
1.第一托架 11. 21.托板 111.銷桿 112. 212.調整元件 113·孔 114.槽孔 12.殼體 121. 122.收納室 2.第二托架 211.樞接部 3.操控機構 31.第一輪 310·320·孔 311.環槽 312.齒部 313、322.帶動塊 32.第二輪 321、齒部 33.傳動輪 34.珠鏈 35.軸筒 351.外端部 352.内端部 353.凸肋 36.彈簧 361.端 41. 42.捲簾組 411. 421.布簾 43.捲筒 431.441、45L 突條 44. 45.端蓋 46.端桿 47.捲收裝置 471·心軸 14 M300511 472.彈簧 473·套接部 48.制動裝置 481·軸桿 5.支撐架1. The first bracket 11. 21. The pallet 111. The pin 112. 212. The adjusting element 113 · the hole 114. The slot 12. The housing 121. 122. The storage chamber 2. The second bracket 211. The pivoting portion 3. Control mechanism 31. First wheel 310·320· hole 311. Ring groove 312. Tooth portion 313, 322. Drive block 32. Second wheel 321, tooth portion 33. Transmission wheel 34. Bead chain 35. The outer end portion 352. the inner end portion 353. the rib 36. the spring 361. the end 41. 42. the roller blind group 411. 421. the curtain 43. the reel 431.441, 45L the bulge 44. 45. the end cap 46. Rod 47. Retracting device 471. Mandrel 14 M300511 472. Spring 473 · Socket portion 48. Brake device 481 · Shaft 5. Support frame
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