201038810 六、發明說明： 【發明所屬之技術領域】 本發明是關於-種窗簾’特別是涉及一種以拉繩來疊 收及垂放遮光幕，同時在危險發生時該拉繩可以安全鬆脫 的窗簾。 【先前技術】 在已知的技藝中，用來遮擋光線之遮光物的種類及形 式有报多，其中圖1、2所揭露的習知窗簾i基本上包含： 個懸掛在窗戶上緣處的樑座1丨、一個垂放在樑座〗丨下方 的遮光幕12、一個安裝在遮光幕12上的疊收組件13，以 及一個連接所述疊收組件13的拉繩單元14。該遮光幕12 具有一個可以被疊收的遮光部丨21，該遮光部丨2丨具有數個 間隔的組裝槽122。而所述疊收組件13具有數支橫向穿設 在組裝槽122内的橫架桿131，以及數個間隔且左右對稱地 固定在遮光部121上的連接帶132。而該拉繩單元14包括 數個分別穿套在連接帶132上的扣環141，以及一條穿過所 述扣環141的拉繩142。該拉繩142具有一個位在遮光幕 12則方並方便使用者操作的操控段143，以及兩段穿過同 側的扣環141後繫結在最下面的扣環141上的連動段144。 使用時只要拉動該拉繩142的操控段143，就可以同步 牵動最下方的兩個扣環141上移，也就是讓最下方的扣環 141逐漸上移後和上方的扣環141靠在一起，如此一來，位 在相靠近的扣環141間的遮光幕12就會形成疊收狀，借此 達到疊收遮光幕12的目的。 201038810 習知窗簾1為了達到疊收及垂放遮光幕12的目的該 拉繩142通常是由韌性很好的繩子所製成，因此，在使用 時不容易被扯斷，此外，拉繩142也必須牢固地繫結在最 下方的扣環141上，因為兩者如果脫離，拉繩142就無法 順利執行疊收遮光幕12的功能。這種習知窗簾丨的設計固 然可以確保操作的順暢性，但是一般窗簾丨通常是安裝在 幼兒活動的室内，家中的幼兒也經常在窗簾〗附近玩耍， 當幼兒拿著拉繩142玩耍並且將拉繩142套設在脖子上時 ，韌性很好且底端繫結穩固的拉繩142就很可能緊緊的纏 繞在幼兒的脖子上，並且引發致命的危險性，因此，習知 窗簾1在使用時存在不可預期的危險性。 【發明内容】 本發明之目的是提供一種可以提高使用安全性、操作 方便，並可長期反覆使用的可安全鬆脫的窗簾。 本發明的窗簾包含：一個樑座、一個垂掛在樑座下方 並具有一個垂放部的遮光單元、一個用來疊收及垂放遮光 單元的拉繩單元，以及至少一個安裝在拉繩單元上並使遮 光單兀的垂放部可以被往上疊收的磁吸機構。該磁吸機構 包括個上磁吸座，以及一個和上磁吸座相吸附並在承受 外力拉扯且拉扯力大於吸附力時和上磁吸座分離的下磁吸 座。 本發明的有益功效在於：藉磁吸機構及拉繩單元的連 接’可以帶動遮光單元正常的垂放及疊收，而當拉繩單元 又到不正常的外力拉扯，而且拉扯力大於上、下磁吸座的 201038810 吸附力時，前述上磁吸座及下磁吸座就會自動地鬆脫。由 於在危險發生時，本發明之拉繩單元可以自動鬆脫，而在 鬆脫後藉由簡易的操作就可回復相吸附狀態，因此，該窗 簾在使用時不僅具有較佳的安全性，亦具有操作方便以及 可長期反覆使用等功效。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 0 以下配合參考圖式之較佳實施例的詳細說明中，將可清楚 的呈現。 在本發明被詳細描述之前，要注意的是，在以下的說 明内容中，類似的元件是以相同的編號來表示。 . 參閱圖3、4、5，本發明窗簾的第一較佳實施例適合安 裝在窗戶（圖未示）的上緣處，並且包含：一個橫向架設在窗 戶上緣處的樑座2、一個垂掛在該樑座2下方的遮光單元3 、一個用來疊收及垂放該遮光單元3的拉繩單元4,以及兩 Q 個可鬆脫地安裝在拉繩單元4上的磁吸機構5。 該遮光單元3包括一片具有遮光效果的遮光幕31，以 及一個安裝在遮光幕31上的疊收組件32。該遮光幕31的 上方是固定地安裝在樑座2上，底部則是往下垂放，並具 有一個靠近下方的垂放部311，以及數個橫向間隔設置的組 裝槽312。而所述疊收組件32具有數條橫向裝設在組裝槽 312内的橫穿桿321，以及數個上下間隔並且左右對稱地固 . 疋在遮光幕31背面的連接帶322，前述連接帶322的安裝 位置都鄰近組裝槽312。 201038810 本實施例的拉繩單元4包括一條穿經樑座2的拉繩41 、數個安裝在部分連接帶322上的中間扣環42，以及兩個 女農在最底端的連接帶322上的底扣環43。其中該拉繩41 具有一段自樑座2往下垂放並且位在遮光幕31前方的操控 段411，以及兩段自樑座2往下垂放並左右對應地位在遮光 幕31後方的連動段412,每個連動段412都具有一個靠近 同側的底扣環43的繫結端413。而所述中間扣環42可讓拉 繩41上同側的連動段412穿過，底扣環43則是安裝在最 下方的連接帶322上。 本貫施例的每個磁吸機構5都包括一個繫結在拉繩41 的繫結端413下方的上磁吸座51，以及一個和底扣環43釣 合的下磁吸座52。該上磁吸座51具有一個塑膠製成的上組 裝塊511，以及一個嵌埋在上組裝塊511底部的上磁吸件 512，該上組裝塊511具有一個鄰近周圍且朝下的底環面 513、一個從該底環面513内側緣往上並往中央傾斜的内導 環面514、一個自該内導環面514往上凹設的上容置槽515 ，以及一個靠近上方位置並供拉繩41的繫結端413繫結的 上結合孔516，該上磁吸件512可以是例如磁鐵等等本身具 有磁吸力的物件’其是嵌埋在該上容置槽515内，並具有 一個朝下的上磁吸面517。 本實施例之下磁吸座52具有一個塑膠製造的下組裝塊 521，以及一個埋設在該下組裝塊521靠近上方位置的下磁 吸件522,該下組裝塊521具有一環和上組裝塊511的底環 面513對應的外周環面523、一環由該外周環面523内端往 201038810 上並往中央傾斜的外導環面524、一個由上往下凹設的下容 置槽525,以及一個靠近下方位置並供底扣環43鉤掛的下 結合孔526，而該下磁吸件522可以是本身具有磁吸力的磁 鐵形式’也可以是能夠被磁鐵吸附的導磁物件，其是嵌埋 在該下容置槽525内，並具有一個朝上的下磁吸面527。 在本實施例中，該上、下磁吸件512、522的吸附力是 根據需要設定，為了兼顧實用性及使用安全性，該等上、 下磁吸件512、522的吸附力必須能夠承受遮光單元3的重 量，以便於利用磁吸機構5的連接，將遮光幕31的垂放部 311往上疊收或者往下垂放。但是當拉繩單元4受到外力拉 扯，而且拉扯力量大於上、下磁吸件512、522的吸附力時 ，該上、下磁吸座51、52就可以自動的分開。 也就是說，本實施例的窗簾在正常使用狀態下，該磁 吸機構5是連結在拉繩41的繫結端413以及底扣環43之 間。當使用者拉動拉繩41的操控段411時，可以同步帶動 位在後面的兩個連動段412，由於上、下磁吸件512、522 之間的吸附力大於遮光單元3的垂放重量，因此，在拉動 拉繩41 %，可以同步拉動遮光幕31的垂放部311上移借 此達到疊收及垂放遮光幕31順暢的目的。 而當幼兒在玩弄窗簾的拉繩41，且拉繩41不小心纏繞 在幼兒的脖子上時，只要幼兒拉扯拉繩41的力量稍為大於 承載遮光單元3重量之力量’即稍為大於上、下磁吸座51 、52的吸附力時，安裝在拉繩41及底扣環43之間的上、 下磁及座51、52就會自動地鬆脫，如此一來，就可以避免 7 201038810 拉繩41纏繞玩耍的幼兒，故本實施例的窗簾確實具有較佳 的使用安全性。此外，本發明之上、下吸附座51、52在鬆 脫後’只要讓兩者再次接近’就可相互吸附並自動導正， 故該項設計除了具有較佳的安全性外，亦具有操作方便、 可長期反覆使用等功效。 參閱圖6、7,本發明窗簾的第二較佳實施例基本上和 第一實施例類似’不同的地方在於：該拉繩41的連動段 412都具有一段位在上方的上繩部414，以及一段位在下方 並且和底扣環43繫結固定的下繩部415，而該磁吸機構5 包括一個繫結在該上繩部414下端的上磁吸座51 ,以及一 個繫結在下繩部415上端的下磁吸座52。也就是說，本發 明第二較佳實施例的磁吸機構5可以安裝在拉繩41之連動 段412的任何位置，借由改變磁吸機構5的安裝位置，同 樣可以達到增加窗簾使用安全性以及操作方便等目的。 惟以上所述者，僅為本發明之較佳實施例而已，當不 倉b以此限疋本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一種習知窗簾的後視立體圖； 圖2是圖1之習知窗簾的側視疊收示意圖； 圖3疋本發明窗簾之第一較佳實施例的後視立體圖； 一圖疋該第較佳實施例的局部立體放大圖，主要顯 示該窗簾的一個磁吸機構； 201038810 圖5是該第一較佳實施例的一局部組合剖視圖，主要 顯示該磁吸機構； 圖6是一類似圖3的後視立體圖，顯示本發明窗簾的 第二較佳實施例；及 圖7是該第二較佳實施例的一個局部組合剖視圖。 201038810 【主要元件符號說明】 2 樑座 5 磁吸機構 3 遮光單元 51 上磁吸座 31 遮光幕 511 上組裝塊 311 垂放部 512 上磁吸件 312 組裝槽 513 底環面 32 疊收組件 514 内導環面 321 橫穿桿 515 上容置槽 322 連接帶 516 上結合孔 4 拉繩單元 517 上磁吸面 41 拉繩 52 下磁吸座 411 操控段 521 下組裝塊 412 連動段 522 下磁吸件 413 繫結端 523 外周環面 414 上繩部 524 外導環面 415 下繩部 525 下容置槽 42 中間扣環 526 下結合孔 43 底扣環 527 下磁吸面 10201038810 VI. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a kind of curtains, in particular to a type of curtain that is stacked and placed with a drawstring, and the cord can be safely released when a danger occurs. curtain. [Prior Art] In the known art, there are many types and forms of shades for shielding light, and the conventional curtain i disclosed in Figs. 1 and 2 basically comprises: one hanging at the upper edge of the window. The beam seat 1 丨, a shading screen 12 suspended below the beam sill, a stacking assembly 13 mounted on the shading screen 12, and a drawstring unit 14 connecting the stacking assembly 13. The shade 12 has a light-shielding portion 21 which can be stacked, and the light-shielding portion 丨2 has a plurality of spaced-apart assembly grooves 122. The stacking unit 13 has a plurality of crossbars 131 that are transversely disposed in the assembly groove 122, and a plurality of connecting strips 132 that are spaced apart and symmetrically fixed to the light shielding portion 121. The drawstring unit 14 includes a plurality of buckles 141 that are respectively sleeved on the attachment straps 132, and a drawstring 142 that passes through the buckles 141. The drawstring 142 has a control section 143 which is located on the side of the shade 12 and is convenient for the user to operate, and a link section 144 which is fastened to the lowermost buckle 141 after passing through the same side of the buckle 141. When the lever 142 is pulled by the control section 143, the lowermost two buckles 141 can be moved up and down, that is, the lowermost buckle 141 is gradually moved up and the upper buckle 141 is placed on the upper side. Together, in this way, the shading screen 12 located between the adjacent buckles 141 forms a stacking shape, thereby achieving the purpose of stacking the shading screens 12. 201038810 Conventional Curtain 1 The cord 142 is usually made of a tough rope for the purpose of stacking and placing the shading screen 12, so that it is not easily torn during use, and the cord 142 is also It must be firmly fastened to the lowermost buckle 141, because if the two are disengaged, the drawstring 142 cannot smoothly perform the function of the stacked shade 12. The design of the conventional curtain 丨 can ensure the smooth operation of the operation, but generally the curtain 丨 is usually installed in the indoors of the children's activities, and the children in the home often play near the curtains, when the child plays with the drawstring 142 and will When the drawstring 142 is set on the neck, the drawstring 142 which has good toughness and the bottom end is firmly tied is likely to be tightly wrapped around the neck of the child, and causes a fatal danger. Therefore, the conventional curtain 1 is There is an unpredictable danger when used. SUMMARY OF THE INVENTION An object of the present invention is to provide a safe and detachable curtain which can improve safety in use, is easy to operate, and can be used over a long period of time. The curtain of the present invention comprises: a beam seat, a light shielding unit suspended below the beam seat and having a vertical portion, a cable unit for stacking and lowering the light shielding unit, and at least one mounted on the cable unit And the vertical portion of the shading unit can be superposed on the magnetic attraction mechanism. The magnetic attraction mechanism includes an upper magnetic chuck, and a lower magnetic housing that is attracted to the upper magnetic pickup and is separated from the upper magnetic housing when the external force is pulled and the pulling force is greater than the adsorption force. The beneficial effect of the invention is that: the connection of the magnetic attraction mechanism and the rope pulling unit can drive the normal hanging and stacking of the light shielding unit, and when the pulling rope unit is pulled to an abnormal external force, the pulling force is greater than the upper and lower sides. When the magnetic suction seat of the 201038810 is adsorbed, the upper magnetic base and the lower magnetic base are automatically released. Since the drawstring unit of the present invention can be automatically released when a danger occurs, and the phase adsorption state can be restored by a simple operation after loosening, the curtain can not only have better safety when used, but also It has the functions of convenient operation and long-term repeated use. 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 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. Referring to Figures 3, 4, and 5, a first preferred embodiment of the window covering of the present invention is adapted to be mounted at the upper edge of a window (not shown) and includes: a beam seat 2 transversely disposed at the upper edge of the window a shading unit 3 hanging below the beam base 2, a pull cord unit 4 for stacking and lowering the shading unit 3, and two Q magnetic attraction mechanisms 5 releasably mounted on the cord unit 4. . The shading unit 3 includes a shading screen 31 having a light blocking effect, and a stacking assembly 32 mounted on the shading screen 31. The upper side of the shading screen 31 is fixedly mounted on the beam base 2, and the bottom portion is suspended downwardly, and has a vertical portion 311 near the lower side, and a plurality of laterally spaced assembly grooves 312. The stacking assembly 32 has a plurality of transverse rods 321 disposed laterally in the assembly groove 312, and a plurality of connecting strips 322 which are vertically spaced apart and symmetrically fixed to the back of the light shielding screen 31. The connecting strips 322 are connected. The mounting locations are all adjacent to the assembly slot 312. 201038810 The drawstring unit 4 of the present embodiment includes a drawstring 41 that passes through the beam mount 2, a plurality of intermediate buckles 42 mounted on the partial attachment straps 322, and two female farmers on the bottommost connecting strap 322. Bottom buckle 43. Wherein the pull cord 41 has a control section 411 which is suspended from the beam seat 2 and is located in front of the light shielding screen 31, and two sections of the interlocking section 412 which are suspended from the beam seat 2 and which are positioned to the left and right behind the light shielding screen 31, each of which The interlocking section 412 has a tying end 413 that is adjacent to the underside snap ring 43. The intermediate buckle 42 allows the interlocking section 412 on the same side of the pull cord 41 to pass therethrough, and the bottom retaining ring 43 is mounted on the lowermost connecting strap 322. Each of the magnetic attraction mechanisms 5 of the present embodiment includes an upper magnetic pickup base 51 which is fastened below the binding end 413 of the pull cord 41, and a lower magnetic suction mount 52 which is caught by the bottom buckle ring 43. The upper magnetic base 51 has a plastic upper assembly block 511 and an upper magnetic member 512 embedded in the bottom of the upper assembly block 511. The upper assembly block 511 has a bottom annular surface adjacent to the periphery and facing downward. 513, an inner guide ring surface 514 which is inclined upward from the inner edge of the bottom ring surface 513 and is inclined toward the center, an upper receiving groove 515 which is recessed upward from the inner guide ring surface 514, and an upper position and a position The binding end 413 of the pull cord 41 is tied to the upper coupling hole 516, and the upper magnetic member 512 may be, for example, a magnet or the like having a magnetic attraction itself, which is embedded in the upper receiving groove 515 and has A downwardly facing upper magnetic surface 517. The magnetic chuck 52 has a lower plastic assembly block 521 and a lower magnetic member 522 embedded in the upper assembly block 521. The lower assembly block 521 has a ring and an upper assembly block 511. The bottom ring surface 513 corresponds to the outer circumferential ring surface 523, a ring outer ring surface 524 which is inclined from the inner end of the outer circumferential ring surface 523 to the 201038810 and is centrally inclined, and a lower receiving groove 525 which is recessed from the top to the bottom, and a lower coupling hole 526 which is close to the lower position and is hooked by the bottom buckle 43, and the lower magnetic member 522 may be in the form of a magnet having a magnetic attraction itself, or may be a magnetically permeable member that can be attracted by the magnet, which is embedded It is buried in the lower receiving groove 525 and has an upwardly facing lower magnetic surface 527. In the present embodiment, the adsorption forces of the upper and lower magnetic members 512, 522 are set as needed, and in order to achieve both practicality and safety of use, the adsorption forces of the upper and lower magnetic members 512, 522 must be able to withstand. The weight of the shading unit 3 is such that the vertical portion 311 of the shading curtain 31 is stacked upward or downward by the connection of the magnetic attraction mechanism 5. However, when the drawstring unit 4 is pulled by an external force and the pulling force is greater than the suction force of the upper and lower magnetic members 512, 522, the upper and lower magnetic holders 51, 52 can be automatically separated. That is, the curtain mechanism of the present embodiment is coupled between the tying end 413 of the pull cord 41 and the bottom buckle ring 43 in the normal use state. When the user pulls the control section 411 of the pull cord 41, the two interlocking sections 412 which are located at the rear can be synchronously driven. Since the adsorption force between the upper and lower magnetic members 512, 522 is greater than the vertical weight of the shading unit 3, Therefore, when the pulling rope 41% is pulled, the hanging portion 311 of the shading curtain 31 can be pulled up to move up to achieve the purpose of smoothing and stacking the shading screen 31. When the child is playing with the drawstring 41 of the curtain, and the drawstring 41 is accidentally wrapped around the neck of the child, as long as the child pulls the pull cord 41, the force is slightly larger than the weight of the light-shielding unit 3, which is slightly larger than the upper and lower magnets. When the suction force of the suction seats 51 and 52 is applied, the upper and lower magnets and the seats 51 and 52 installed between the pull cord 41 and the bottom buckle ring 43 are automatically released, so that the 7 201038810 drawstring can be avoided. The curtain of the present embodiment is wound around the play, so the curtain of the present embodiment does have better safety in use. In addition, the upper and lower adsorption seats 51, 52 of the present invention can be mutually adsorbed and automatically guided after being released, as long as the two are brought close to each other, so that the design has operation in addition to better safety. Convenient, long-term use and other functions. Referring to Figures 6 and 7, the second preferred embodiment of the window covering of the present invention is substantially similar to the first embodiment in that the interlocking section 412 of the pull cord 41 has a upper upper thread portion 414. And a lower rope portion 415 which is positioned below and fastened to the bottom buckle ring 43, and the magnetic attraction mechanism 5 includes an upper magnetic suction seat 51 which is fastened to the lower end of the upper rope portion 414, and a lower rope The lower magnetic housing 52 at the upper end of the portion 415. That is, the magnetic attraction mechanism 5 of the second preferred embodiment of the present invention can be mounted at any position of the interlocking section 412 of the pull cord 41. By changing the mounting position of the magnetic attraction mechanism 5, it is also possible to increase the safety of the use of the blind fabric. And the purpose of easy operation. However, the above is only a preferred embodiment of the present invention, and is not limited to the scope of the present invention, that is, the simple equivalent change according to the scope of the invention and the description of the invention. And modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rear perspective view of a conventional window covering; FIG. 2 is a side elevational view of the conventional window covering of FIG. 1; FIG. 3 is a rear view of the first preferred embodiment of the window covering of the present invention. FIG. 5 is a partial sectional view of the first preferred embodiment, mainly showing the magnetic attraction mechanism; Figure 6 is a rear perspective view similar to Figure 3 showing a second preferred embodiment of the window covering of the present invention; and Figure 7 is a partial assembled cross-sectional view of the second preferred embodiment. 201038810 [Description of main components] 2 Beam base 5 Magnetic mechanism 3 Shading unit 51 Upper magnetic housing 31 Shading curtain 511 Upper assembly block 311 Vertical part 512 Upper magnetic part 312 Assembly groove 513 Bottom ring surface 32 Stacking assembly 514 The inner guide ring surface 321 traverses the rod 515. The accommodating groove 322 is connected to the belt 516. The upper joint hole 4 the pull cord unit 517. The magnetic surface 41 the pull cord 52 the lower magnetic base 411 the control section 521 the lower assembly block 412 the linkage section 522 Suction member 413 Tie end 523 Outer peripheral annulus 414 Upper rope portion 524 Outer guide ring surface 415 Lower rope portion 525 Lower accommodation groove 42 Middle buckle 526 Lower coupling hole 43 Bottom buckle ring 527 Lower magnetic surface 10