200919010 九、發明說明： 【發明所屬之技術領域】 本發明係《於-種背光模組外框，特別係有關於—種便拆卸式背 光模組之外框。 【先前技術】 背光模組之外框通常包括一膠框及一背板，並將背光模組外框之膠 框與背板加工形成可供相互扣合之卡合結構，藉此以固定背光模組内資 材，此背光模組之外框的設計方式是否便於組裝拆卸及其固定方式是 否良好，將會嚴重影響到成品良率及生產速度。 習用之背光模組之外框多設計為外卡勾式定位。第丨圖中顯示出一 習知外卡勾式膠框與背板之卡合結構之立體結構示意圖，其中背板u 上幵/成至^侧邊（未標號），其上設有背板卡勾U、η，而在膠框Μ 之對應位置上卿成有雜方孔鋪16、η。組裝時雜背板卡勾η、 13插置於相應的膠框方孔插槽16、㈣，以達到㈣膠框及背板之目 的。 上述之卡勾式卡合結構無法完全限制膠框沿其平面方向（如第i圖 箭號Y所示之方向）的位移或變形，因此尚需要在背板上設置額外的 結構來使兩者固定。例如在背板u上設置扣合月14，其可插入至膠框 15上相對應設置的開〇 18内，並以其上緣卡扣貼合於開口㈣上緣 侧壁’進而防止背板U與馳15在箭號γ所示之方向上產生相對位 移。 另卜為保也整個卡合結構緊湊及配合到位，該卡勾式卡合結構往 200919010 彺將背板卡勾與膠框方孔之配合尺寸設計得較為緊凑，這將導致操作人 __娜整個卡合結觸，增加了操作複雜度且 #人貝產生疲勞，如操作不慎還會造成顯示器之絲則（㈣） 上下移位或碰撞刮傷畫面等不良後果，進而降低生產線良率及增加製造 成本。 故’有必要提供—種耀框與背板之新卡合結構，以克服習知技術中 存在的缺陷。 【發明内容】 g本發日狀目的在於提供—種便拆帽光模組之外框，可改善傳統 膠框與月板之卡合結構中容易造成膠框位移變形及必須結合其他結構 Μ固疋勝框與背板等問題’進而提高產品品質，並且藉由該種便拆卸 切光模組之外框的便利組裝與拆卸之優點，以降低拆裝難易度及提 馬拆裝速度、減少操作時間。 依據本發明之上述目的’本發明之一實施例提供一種背光模組之外 框，包含有-膠框及-背板。膠框具有一第一折邊及一第一開口，第 ~折邊具有—鱗m第m㈣底緣向第 -折邊的内部凹設’第—卡勾及第二卡勾朝向底緣延伸，並伸入第一 開口中。背板具有-第二折邊及_第二開σ，第二開口設於第二折邊， 第二折邊具有—卡扣部，設於第二開口上方’卡扣部具有-頂壁、-第側壁及-第一側壁，第—側壁及第二側壁相對設置且分別自第二 折邊向上延伸，頂壁連接第—側壁及第二側壁，位於第二開口上方。 且第-卡勾及第二卡⑽分顺第—麵及第二倾械合設置。 200919010 與先前技術相比較，本發明的背光模組外框係將卡合結構之卡勾設 a十為兩根相互平行而稍微分離開之4平狀突出物，並將卡合結構之卡 P又。十為向外側犬出之貫通結構，形成一可供卡勾插置之卡扣 部’卡勾可插置於該卡扣部内，以達成固定之目$。此種新穎卡合機 構可代替傳統雜方孔射板卡自找位。如此設計之賴卸式卡合 、’。構可改善傳統膠框與背板之卡合結構巾容易造成膠框位移變形及必 須結合其他結構關定雜與背板等問題，進而提高產品品f ;並便 於操作人員組裝與拆卸，以降低拆裝難易度及提高拆裝速度，並減少 操作時間。 為了讓本發明之上述目的、特徵、和優點能更明顯，下文特舉本 發明實施例，並配合所附圖示，作詳細說明如下。 【實施方式】 凊參照第2圖 '第3圖與第4圖所示，根據本發明，其提供一種背 光模組之外框，其包含一膠框（第一框架）2〇及一背板（第二框架） 40。膝框20具有至少一第一_^勾21和一第二卡勾22，背板40具有至 少一·^扣部41，第一卡勾21及第二卡勾22與背板的卡扣部41可相互 插置配合，以達成膠框2〇與背板40固定之目的。 膠框20係由塑膠材料製成。膠框2〇具有一第一折邊2〇〇及至少_ 第一開口 25，第一折邊200具有一底緣201，以及上述的第一_^勾21 和第二卡勾22，第一開口 25自底緣201向第一折邊200的内部凹設。 在本實施例中，第一開口 25的數目大於一。第一-^勾21與第二卡勾 200919010 22係相互平行排列的朝向底緣201延伸，並伸入第一開口 25中，且其 結構形狀、大小厚度完全相同，具有對稱的結構。第一卡勾21上設有 第-卡合部23與第-卡扣臂26。相對的，第二卡$ 22上設有第二卡 合部24及第二卡扣臂27,第-卡扣f 26與第二卡扣臂27係互相平行。 第-卡合部23設於第-卡扣臂％的外側緣，第二卡合部Μ設於第二 卡扣臂27的外側緣，第一卡合部23與第二卡合部Μ係沿著相反的方 向自第-卡扣臂26與第二卡扣臂27二者相對的外側緣稍微向外突出。 第-卡勾21與第二卡勾22係由彈性材料製成，具有—定的彈性。 參見第3圖，第-卡勾21與第二卡勾22係相互分離設置，在第一 卡勾2i及相對之第二卡勾η間有一間隙μ，此間隙28可提供第一^^ 扣臂26及第二卡扣臂27相向彈性變形時的$間。換言之，第—卡扣臂 26及第二卡扣臂27勤具有適#彈性之㈣製成，其皆具有彈性並分 離開’當第一卡扣f26及第二卡扣臂27受到相向之力的作用時（如第200919010 IX. Description of the Invention: [Technical Field of the Invention] The present invention is a frame of a backlight module, and particularly relates to a frame for a detachable backlight module. [Previous Art] The outer frame of the backlight module usually includes a plastic frame and a back plate, and the plastic frame and the back plate of the outer frame of the backlight module are processed to form a snap-fit structure for fastening to each other, thereby fixing the backlight. In the module, whether the design of the outer frame of the backlight module is convenient for assembly and disassembly and whether the fixing method is good, will seriously affect the yield of the finished product and the production speed. The outer frame of the conventional backlight module is designed to be externally hooked. In the figure, a three-dimensional structure diagram of a conventional snap-fit plastic frame and a back plate is shown, wherein the back plate u is 幵/成到^ sides (not labeled), and the back plate is provided thereon. The hooks U and η are in the corresponding positions of the plastic frame 卿, and the square holes 16 and η are formed. When assembling, the backplane hooks η and 13 are inserted into the corresponding plastic frame square hole slots 16, (4) to achieve the purpose of (4) plastic frame and back plate. The above-mentioned hook-type engaging structure cannot completely limit the displacement or deformation of the plastic frame in the plane direction thereof (such as the direction indicated by the arrow Y in FIG. i), so it is necessary to provide an additional structure on the backboard to make both fixed. For example, a fastening month 14 is arranged on the back plate u, which can be inserted into the corresponding opening 18 of the plastic frame 15 and snapped to the upper edge of the opening (4) with the upper edge thereof to prevent the back plate. U and Chi 15 produce a relative displacement in the direction indicated by the arrow γ. In addition, the overall locking structure of the Bao is also compact and fits in place. The hook-type snap-fit structure is designed to be more compact in the size of the backplane hook and the plastic frame square hole in 200919010, which will result in the operator __ Na's entire snap-in contact increases the complexity of the operation and #人贝 fatigue, such as the accidental operation will cause the display silk ((4)) up and down shift or collision scratch screen and other adverse consequences, thereby reducing the production line yield And increase manufacturing costs. Therefore, it is necessary to provide a new structure of the frame and the back plate to overcome the defects in the prior art. SUMMARY OF THE INVENTION The purpose of the present invention is to provide a frame for removing the cap light module, which can improve the deformation of the plastic frame and the structure of the traditional plastic frame and the moon plate. The problem of the frame and the backboard is further improved, and the product quality is improved, and the advantages of convenient assembly and disassembly of the outer frame of the light-cutting module are removed, thereby reducing the ease of assembly and disassembly and the speed of disassembly and assembly. Operating time. According to an embodiment of the present invention, an embodiment of the present invention provides a backlight module outer frame including a plastic frame and a back plate. The plastic frame has a first folded edge and a first opening, and the first folded edge has a scale m, and the m (four) bottom edge extends toward the inner portion of the first folded edge, and the first hook and the second hook extend toward the bottom edge. And reach into the first opening. The back plate has a second flange and a second opening σ, the second opening is disposed on the second flange, and the second flange has a buckle portion disposed above the second opening, the buckle portion has a top wall, - a first side wall and a first side wall, the first side wall and the second side wall are oppositely disposed and extend upward from the second side, the top wall connecting the first side wall and the second side wall, above the second opening. And the first hook and the second card (10) are separated from the first surface and the second tilting mechanism. 200919010 Compared with the prior art, the outer frame of the backlight module of the present invention is provided with a card-shaped hook of the engaging structure, and four flat protrusions which are separated from each other and are slightly separated, and the card of the engaging structure P also. Ten is a through structure to the outer dog, forming a snap portion into which the hook can be inserted. The hook can be inserted into the buckle portion to achieve a fixed target of $. This novel clamping mechanism can replace the traditional miscellaneous hole plate card to find the position. So designed to be snapped, '. The structure can improve the traditional plastic frame and the back plate of the structure structure towel, which is easy to cause deformation of the plastic frame displacement and must be combined with other structures to determine the miscellaneous and backboard problems, thereby improving the product product f; and facilitating assembly and disassembly by the operator to reduce Easy to assemble and disassemble, increase disassembly speed, and reduce operating time. The above described objects, features and advantages of the present invention will become more apparent from the description of the appended claims. [Embodiment] Referring to FIG. 2, FIG. 3 and FIG. 4, according to the present invention, there is provided a backlight module outer frame including a plastic frame (first frame) 2〇 and a back plate. (second frame) 40. The knee frame 20 has at least one first hook 21 and a second hook 22, and the back panel 40 has at least one button portion 41, a first hook 21 and a second hook 22 and a buckle portion of the back panel 41 can be inserted into each other to achieve the purpose of fixing the plastic frame 2〇 and the back plate 40. The plastic frame 20 is made of a plastic material. The plastic frame 2 has a first flange 2 〇〇 and at least _ a first opening 25, the first flange 200 has a bottom edge 201, and the first _^ hook 21 and the second hook 22, first The opening 25 is recessed from the bottom edge 201 toward the inside of the first flange 200. In the present embodiment, the number of the first openings 25 is greater than one. The first -^ hook 21 and the second hook 200919010 22 extend parallel to each other toward the bottom edge 201 and extend into the first opening 25, and have the same structural shape, size and thickness, and have a symmetrical structure. The first hook 21 is provided with a first engaging portion 23 and a first engaging arm 26. In contrast, the second card $22 is provided with a second engaging portion 24 and a second latching arm 27, and the first buckle f26 and the second latching arm 27 are parallel to each other. The first engaging portion 23 is disposed on the outer edge of the first latching arm %, the second engaging portion is disposed on the outer edge of the second latching arm 27, and the first engaging portion 23 and the second engaging portion are tied The outer edge from the opposite side of the first-snapped arm 26 and the second snap arm 27 protrudes slightly outward in the opposite direction. The first hook 21 and the second hook 22 are made of an elastic material and have a constant elasticity. Referring to FIG. 3, the first hook 21 and the second hook 22 are separated from each other, and a gap μ is provided between the first hook 2i and the opposite second hook n. The gap 28 can provide the first button. The arm 26 and the second latching arm 27 face each other in the direction of elastic deformation. In other words, the first latching arm 26 and the second latching arm 27 are made of (elastic) (4), which are all elastic and separated apart when the first buckle f26 and the second latching arm 27 are opposed to each other. Time (such as
J A -Jr i±> » » l 背板40係由具有適當強度的適當材料贺傲而占J A -Jr i±> » » l The back plate 40 is made up of appropriate materials with appropriate strength.
開口 401的上方。卡扣部41具有一頂壁45、一 〆 不一丨歼」u 4〇1，第二 ί 一卡扣部41，設於第二 —第一側壁43及—第二 侧壁44，第-侧壁43及第二側壁44相對設置，且分別自第二折邊· 8 200919010 向上延伸’頂壁45連接第-側壁43和第二側壁44，位於第二開口 4〇ι 上方。在本實侧巾，第-嫩43及第二健44分職第二折邊4〇〇 形成-銳角而向第二開口 401内部延伸，且頂壁45與第一側壁43和第 二側壁44的連接處，以及第-_ 43和第二側壁私與第二折邊· 的連接處都設錢將過渡部分（未標號）。頂壁&輿第二折邊4〇〇係 相互平行且分離設置，卡扣部41之碰45、第―_ 43及第二側壁Above the opening 401. The latching portion 41 has a top wall 45, a 丨歼 丨歼 u u u , , , , , , , , u u u u u u u u u 设 设 设 设 设 第二 设 设 设 设 第二 设 第二 第二 第二The side wall 43 and the second side wall 44 are oppositely disposed, and extend upward from the second hem 8 200919010, respectively. The top wall 45 connects the first side wall 43 and the second side wall 44 above the second opening 4 〇 . In the actual side scarf, the first side 43 and the second side 44 are divided into second corners 4 to form an acute angle extending toward the inside of the second opening 401, and the top wall 45 and the first side wall 43 and the second side wall 44 The connection, as well as the junction of the -_43 and the second side wall and the second side edge, are set to the transition part (not numbered). The top wall & 舆 second hem 4 〇〇 is parallel and separated from each other, and the buckle portion 41 touches the 45, the _ 43 and the second side wall
44界定出—貫通的卡扣槽42，可供膠框2G的第-卡勾21及第二卡勾 22插置其内。 在此實施例中，膠框20係套設於背板4〇之外側，而雜2〇的第 -卡勾21肖第二卡勾22則插置於背板4〇的卡扣部41内侧之卡扣槽 42内。透過第一卡勾2卜第二卡g 22之彈性，在第—卡勾η及第二 卡勾22的彈性變形下’第一卡勾21及第二卡勾22可插入至卡扣槽π 内’同時亦透過其彈性回復，在膠框2〇完全套設至背板4〇上後，第一 卡勾21的第一卡扣部23及第二卡勾22的第二卡合部24可卡扣於卡扣 槽42的第—側邊43和第二側邊44，使得第一卡勾21及第二卡勾22 與卡扣部41相互扣合，達联位膠框2Q與背板4Q之目的。惟在此須 說明的是’第一卡㈣、第二卡勾22、第—開口 25、第二開口彻與 卡扣部41等元件之結構、形狀、大小、厚度及設置位置並無任何限制， 只要其滿足第-卡勾2卜第二卡勾22與卡扣部41相互扣合時能夠完 全配合且能起到定位作用及便於拆裝即可。 明參照第2圖與第3圖，在進行組裝時，由於第一_^勾21及第二 200919010 卡勾22係分別與第一側壁43及第二側壁44相配合設置，按照圖中箭 號c所示之組裝方向，將膠框2〇及背板4〇互相靠近，並將第一卡勾 21、第二卡勾22相對於卡扣部41移近並大致上互相對齊，使得第一 卡勾21、第—卡勾22可插入至卡扣槽42内。膠框的第一_^_勾21 及第二卡勾22在第一卡合部23及第二卡合部％的互相背離的外側緣 上分別設有斜面230、240，形狀係設置成朝向第一卡勾21及第二卡勾 22的自由末端處逐漸縮減，因此在插入的過程中，漸縮狀的斜面230、 240會分別抵觸到卡扣槽41的第一側壁43及第二侧壁私而造成斜面 推壓作用，對於第—卡勾21及第二卡勾22的第—卡扣臂％及第二卡 扣臂27分別產生相向的推壓力量，使得卡扣臂26、27產生相向彈性 變形，進而使得第-卡扣臂26及第二卡扣f 27《外側緣間的距離縮 小至足以插入至卡扣槽42内。在膠框2〇完全套設至背板4〇之外側後， 基於第一卡扣臂26及第二卡扣臂27的彈性，第一~^勾21及第二卡勾 的第卡s。卩23及第一卡合部24會由受壓變形的狀態回復至原有 狀態。第一卡扣臂23及第二卡扣臂24穿過頂壁45之下方，即穿過前 述的卡扣槽42 ’且第一卡合部Μ及第二卡合部Μ分別勾住第一側壁 43及第二側壁44,完成膠框2〇與背板4〇之卡合，即完成組裝作業。 第4圖中顯示出本發明之外框組合完成後的情形。 在本實施例中，膠框20之第一開口 25係呈向下開口狀，可供容納 背板40的卡扣部41於其内，因此得以在膠框2〇的第—卡勾、第二 卡勾22嵌入背板40的卡扣槽42内，以及膠框20相應套設於背板4〇 10 200919010 之外側時，使膠框2〇的第一卡勾21及第二卡勾22與背板4〇的卡扣 部41間可相互插置與拔出（如圖中箭號〇與〇所示），進而達成膠框 20與背板40間的定位功能。44 defines a through-groove slot 42 for the first hook 210 and the second hook 22 of the plastic frame 2G to be inserted therein. In this embodiment, the plastic frame 20 is sleeved on the outer side of the back plate 4〇, and the second and second hooks 21 are inserted into the inner side of the buckle portion 41 of the back plate 4〇. Inside the snap groove 42. Through the elasticity of the first hook 2 and the second card g 22, under the elastic deformation of the first hook η and the second hook 22, the first hook 21 and the second hook 22 can be inserted into the buckle slot π The first buckle portion 23 of the first hook 21 and the second engagement portion 24 of the second hook 22 are also detached from the back frame 4 by the elastic frame. The first side hooks 43 and the second side hooks 42 and the second side edges 44 of the latching slots 42 are fastened to each other, so as to reach the joint plastic frame 2Q and the back. The purpose of the board 4Q. However, it should be noted that there is no restriction on the structure, shape, size, thickness and setting position of the first card (four), the second hook 22, the first opening 25, the second opening and the locking portion 41. As long as it satisfies the first-hook 2b, the second hook 22 and the buckle portion 41 can be fully engaged and can be positioned and easily disassembled. Referring to FIG. 2 and FIG. 3, when assembling, the first _^ hook 21 and the second 200919010 hook 22 are respectively arranged in cooperation with the first side wall 43 and the second side wall 44, according to the arrows in the figure. In the assembly direction shown by c, the plastic frame 2〇 and the back plate 4〇 are brought close to each other, and the first hook 21 and the second hook 22 are moved closer to each other with respect to the buckle portion 41 and substantially aligned with each other, so that the first The hook 21 and the first hook 22 can be inserted into the snap groove 42. The first _^_hook 21 and the second hook 22 of the plastic frame are respectively provided with inclined surfaces 230 and 240 on the outer edges of the first engaging portion 23 and the second engaging portion % which are away from each other, and the shape is set to face The free ends of the first hook 21 and the second hook 22 are gradually reduced, so that during the insertion process, the tapered slopes 230, 240 respectively abut the first side wall 43 and the second side of the snap groove 41. The wall is privately caused to cause the inclined surface pushing action, and the first clamping arm % and the second locking arm 27 of the first hook 21 and the second hook 22 respectively generate opposing pressing amounts, so that the latching arms 26, 27 The opposite elastic deformation is generated, so that the distance between the outer side edges of the first and second snap arms 26 and 27 is reduced enough to be inserted into the snap groove 42. After the plastic frame 2〇 is completely sleeved to the outer side of the back plate 4〇, based on the elasticity of the first and second latching arms 26 and 27, the first and second hooks 21 and the second card are s. The crucible 23 and the first engaging portion 24 are returned to the original state by the state of being compressed and deformed. The first latching arm 23 and the second latching arm 24 pass under the top wall 45, that is, pass through the aforementioned latching groove 42', and the first engaging portion Μ and the second engaging portion 勾 respectively hook the first The side wall 43 and the second side wall 44 complete the assembly work by completing the engagement between the plastic frame 2 and the back plate 4 . Fig. 4 shows the situation after the completion of the outer frame combination of the present invention. In this embodiment, the first opening 25 of the plastic frame 20 is downwardly open, and the buckle portion 41 of the back plate 40 is received therein, so that the first hook of the plastic frame 2 is When the two hooks 22 are embedded in the latching slots 42 of the backboard 40 and the plastic frame 20 is sleeved on the outer side of the backplane 4〇10 200919010, the first hook 21 and the second hook 22 of the plastic frame 2 are folded. The locking portion 41 of the back plate 4 can be inserted and removed from each other (as indicated by arrows 〇 and 如图 in the figure), thereby achieving the positioning function between the plastic frame 20 and the back plate 40.
在拆卸時，係按照圖中所示組裝之相反方向實施，首先借助膠框 20之第一卡勾21及第二卡勾22的彈性，按照圖中箭號a、b所示之 方向將第-卡勾21與第二卡勾22向内按壓，使得第—卡勾η與第二 卡勾22的第-卡合部23及第二卡合部24分別脫離卡扣部y的第一 側壁43及第側壁44的底緣上， 如此即可沿圖中箭號D所示之方向When disassembling, it is implemented in the opposite direction of the assembly shown in the figure. First, by the elasticity of the first hook 21 and the second hook 22 of the plastic frame 20, the direction is indicated by the arrows a and b in the figure. - the hook 21 and the second hook 22 are pressed inwardly, so that the first hook portion η and the second engaging portion 23 of the second hook 22 are separated from the first side wall of the latch portion y 43 and the bottom edge of the side wall 44, so that it can be along the direction indicated by the arrow D in the figure
框 2_板—41W 背光模組的外框的膠框2〇和背板4〇藉由彈性卡扣而定位，可改善 習知技彳㈣雜射板之卡合結射料造成軸雜_及必紐 合其他結構關定膠框與隸等問題，進而提高產品品質；並且本發 明的背光模料㈣麵料倾⑽較之習_紐於操作人員又 組裝與拆卸’降低拆裝《度及提騎錢度，並減傾作時間。 綜上所述，本發明確已符合發物之要件，爰依法提出專利申 請。惟’以上所述者僅爲本發明之較佳實施方式，舉凡熟習本案技術之 人士援依本發明之精神所作之等效軸變化，歸於後 利範圍内。 寻 【圖式簡單說明】 第1圖㈣知之卡勾式背光外框之勝框與背板卡合結構之部 分立體結構示意圖。 11 200919010 第2圖係本發明之實施例的背光模組外框之立體結構示意圖。 第3圖係本發明之實施例的背光模組外框之分解示意圖。 第4圖係本發明之實施例的背光模組外框組合完成之整體外觀圖。 【主要元件符號說明】 背板 11 卡勾 12 卡勾 13 扣合片 14 膠框 15 方孔插槽 16 方孔插槽 17 開口 18 膠框 20 第一卡勾 21 弟二卡勾 22 第—^合部 23 第二卡合部 24 第一開口 25 第一卡扣臂 26 第二卡扣臂 27 背板 40 卡扣部 41 卡扣槽 42 第一侧壁 43 第二侧壁 44 頂壁 45 第一折邊 200 底緣 201 第二折邊 400 第二開口 401 12Box 2_板—The outer frame of the 41M backlight module is positioned by the elastic snaps, which can improve the conventional technique. (4) The card of the miscellaneous plate is caused by the combination of the injection material. The other structures are related to the problem of the plastic frame and the ligament, thereby improving the product quality; and the backlight molding material (4) of the present invention is more suitable for the assembly and disassembly of the backlight. Raise your money and reduce your time. In summary, the present invention has indeed met the requirements of the hair, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the equivalent axis variation made by those skilled in the art in light of the spirit of the present invention is within the scope of the following. Looking for a simple description of the figure. Fig. 1 (4) Schematic diagram of the three-dimensional structure of the winning frame and the back plate engaging structure of the card-back type backlight frame. 11 200919010 FIG. 2 is a schematic perspective view showing the outer structure of a backlight module according to an embodiment of the present invention. FIG. 3 is an exploded perspective view of the outer frame of the backlight module according to the embodiment of the present invention. Fig. 4 is a view showing the overall appearance of the combination of the outer frame of the backlight module of the embodiment of the present invention. [Main component symbol description] Back panel 11 Card hook 12 Card hook 13 Button piece 14 Plastic frame 15 Square hole slot 16 Square hole slot 17 Opening 18 Plastic frame 20 First card hook 21 Brother two card hook 22 First -^ Fitting portion 23 second engaging portion 24 first opening 25 first snap arm 26 second snap arm 27 back plate 40 snap portion 41 snap groove 42 first side wall 43 second side wall 44 top wall 45 a hem 200 bottom edge 201 second hem 400 second opening 401 12