1311898 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種蓋體固定機構，尤指一種易於操 作組卸該蓋體之蓋體固定機構。 、’' 【先前技術】 按，科技日新月異，電腦處理的速度愈來愈快、價格 亦越低廉，且其應用之範圍亦相當廣泛，舉凡例如企業界 所用之舰ϋ或個人所使用之桌上型電腦料，就其之 飼服器而言，其為可獨立運作、且可抽換之電腦系統，可 料整合於-機架上，以成為—具堆疊並串連之機架飼服 盗’且錢架祠服器之機箱一般皆以金屬材料所製成，立 體積龐大亦顯得較為笨重。以往機架飼服器機箱〇體、， ==體放置於膽服器之機箱上，使蓋體之複 數開孔對準機箱上之複數開孔，再透過複數根螺絲將蓋體 二 =機架伺服器之機箱上’由於機架飼服器之蓋體佔 1二 與重量’因此常使作業人員於進行螺絲之 t"不易將開孔對準，而影響作業效率，㈣複數開孔 與複數根螺絲之設置亦造成成本之增加。 =遂有人提出不需使用螺絲及卫具之蓋體固 構，#參閱第1A圖，該機箱丨上方 機箱1内之-側壁上設有卡鈎12而口二，^ 設於機们上，且開設有貫穿^^=體13係用以蓋 施力之推動部14。 體13之通孔131及用以 請參閱f 1B圖，蓋體13對應於該通孔ΐ3ι設有彈性 19760 5 1311898 ，片132’該彈性片132之一端為固定端132&，固設於蓋體 、13之下緣；另一端為卡合端㈣’用以對應卡合於機箱 • 1内側板上之卡鈎12，且兩端之間形成有按壓部， 該按壓部132c之位置係相對應於蓋體13之軌i3i，並 向上顯露。如圖中所示，一端固設於機箱工内側壁上之卡 鈎12，其另一端係設有大致呈弧形狀之卡扣部m ’並對 、應於上述彈性片132之卡合端132b。 :同時參閱第1A圖及第㈣，實施時，係將蓋體 性；ΓΓ32於^目人1山上’並朝向前蓋11方向推進’則上述彈 "卡〇知132b將接觸到機箱1内側壁之卡扣部 ，。謂著推進之力量持續地作用而使得該彈性片阳 發生彈性變形，而令該卡人 + 部⑵滑動，以同時向下、口:=卿形狀之卡扣 於該卡扣部⑵，而將蓋體13固定設於機箱i上。 請配合參閱第1C圖及第1〇圖，相對 ’則必須自蓋體13之通幻 ^體 令彈屋部！32c向下並帶動彈性片弹以收， 使卡入硿Ha ▼勁抨『生片132產生彈性變形，以 使卡4 _脫離卡扣部12 將蓋體13向外推出，而刀於推動邛14以 π外推出，而將盖體13自機箱ϊ上拆卸 行心相定機構避免了以往需要使用螺絲及工具進 下彈㈣彈性請之—彈覆體】3時，必須-邊向 部Π才能將蓋體13向外^，=二一邊施力於推動 亦有可能由於向下彈壓時 < 極為費力，再者， 料％之％力過度與推ώ之動作配合 19760 6 1311898 -不當而損壞該彈性片132及卡鈎12，實為相當地不方便。 、 因此，如何開發一種蓋體固定機構，以解決上述習知 .技術之各種缺點，實為當今亟待解決之課題。 -【發明内容】 鑒於以上習知技術之缺點，本發明之主要目的在於提 供一種省力、易於操作之蓋體固定機構。 本發明之又—目的在於提供—種可快速拆裝之蓋體 固定機構。 •本，明之復-目的在於提供一種無需使用工具進行 拆裝之蓋體固定機構。 述目的及其他相關之目的’本發明係提供一種 該蓋體係設有—通孔，相之開口的蓋體，且 ^... ^ 口疋枝構包括：擋止部，設於該 ㈣心“ 處’操作件’係位於該通孔中並可 掀啟地轴接至該蓋體， •^該操作端設有用以定位:義二t?端與抵靠端’ -^ 4¾ ,, 擋止。卩之鉤部，並可透過掀 於該蓋_彳面，且I有以及和，係固設 之支p邱、，^_具有犬伸至該通孔中並支撐該抵靠端 之支提供該操作件掀啟後之復位彈性。 孔兩側中巧蓋體係”有對應位於該通 靠端之間可設有該t?/側介於該操作端與抵 該第一結合部及第二=二、，“卜並透過結合件結合至 至該蓋體。該鈎料岐該f作件可掀啟地軸接 、一有面向忒擒止部之引導面及背向 19760 7 1311898 之面。該第-結合部係可設有擋塊，而該操 啟5、、·“部係可具有定位用側邊，以於該操作件掀 =一肢角度時藉較位用侧較位抵靠至該播塊，俾 ㈣件之掀啟角度，較佳地，該掀啟角度係小於 此外。亥操作件之操作端係可設有一便於操作之凹 口，而該蓋體中復可設有一對 翻轉之遮板。於-較佳實施例；^㈣凹口且可向内彈性 I而該蓋體料㈣= 端設有軸接 結合部，並藉由-轴〜 側且對應該轴接部之遮板 ^ 牙11又至該軸接部及該遮板結合部而使 二遮板可向内翻轉地軸接至該蓋體。較佳地，該軸上套嗖 彈f，以提供該遮板保持頂住該蓋體之彈性力。又 在該盍體之蓋合固定操作中 槽之設計於該機箱上朝向機箱V;;推軌㈣ 之鈎部抵靠設於機箱内側面之播止；方向 _、及鈎部之引導面的引導而二:猎由推進力量之 於該播止部，在此同時=传=:之固定面釣止 Λ ， 尔冢抵於刖盍，而將筌鞅m 疋於機箱上。相對地，於拆卸該蓋體時， 使遮板離開操作件而使兩者_成空隙，3板’ 該空隙而撥動該操作件之操作端並施力掀啟該摔乍 向下抵推彈片，同時，該操作 士 牛之抵罪螭 邊係抵接於第一結合1之第一m54的定位用側 施力支點，則使用者二 季工易地精由该操作端施力而將該蓋 19760 8 1311898 -體自該機箱上卸除。 、本創作之盍體固定機構，藉由控制操作件使其鈎呷定 。位或脫離機箱内側面之擔止部，而活動自如地將蓋體^ -且封閉該機箱之開口，利用簡單之機構設計即可達到省2 地組卸蓋體於機箱之功效，除了已克服習知技術中所存在 之缺失外；同時，藉由遮板彈性抵壓於操作件，可遮蔽嗜 -操作件之凹口以防止灰塵或異物掉入，並使蓋體之卸除°需 包竹壓遮板、及操作該操作件二步驟，更可避免因誤觸 遠操作件而使蓋體解除鎖固狀態之情形發生。 【實施方式】 一以下藉由具體實例說明本發明之實施方式，熟悉此技 蟄之人士可由本說明書所揭示之内容輕易地瞭解本發明 之其他優點與功效。 x 請參閱第2A圖，係顯示本發明之蓋體固定機構立體 .分解圖，該機箱2係固設有前蓋21，其位置及大小係對 _應於蓋體3，該蓋體3在蓋合固定於機箱2時，係與前蓋 21相互抵接，而使該機箱2形成封閉狀態。該機箱内側 ••面22設有例如為柱體之擋止部22卜而在蓋體3設有通 .孔31，於該通孔31垂直撞止部221方向之二内側面設有 第一結合部32及遮板結合部33。 上述固定機構係包括··擋止部221、操作件5、以及 彈片4 ’該操作件5係位於該通孔31中並可掀啟地車由接 至該蓋體3，且定義有相對之操作端52與抵靠端54，於 該操作端52設有用以定位至該擋止部221之鉤部，並 9 19760 1311898 可透過掀啟該操作件5而使該㈣5 ，221;該彈片4係固設於 ：相擋止部 .該通孔31中並支撐該抵靠端54之内^面，且具有突伸至 -操作件5掀啟後之復位彈性。|中：牙邛41 ’以提供該 於蓋二T藉由烊接、鉚合或栓鎖等方式固設 體3内側面’另—端為支撐部Μ，係 -方向延伸至該通孔31位置處。 邛 -該操作件5,在相對之二側邊設有 ’第-結合部32之第二結合部5 :::… 具有穿孔。而操作件5之結合部51係 伸有釣部53,該鈎部53#^m端52’並向下延 .略呈曲μ 向前述擋止部221且 另背向擔止部221之固定面哪； 抵⑽54。於本實施财，復設有板狀之遮1311898 IX. Description of the Invention: [Technical Field] The present invention relates to a cover fixing mechanism, and more particularly to a cover fixing mechanism which is easy to operate to unload the cover. , ''[Previous technology] Press, technology is changing with each passing day, computer processing speed is getting faster and faster, and the price is also lower, and its application range is also quite wide, such as the table used by the ship or the individual used by the business community. The type of computer material, in terms of its feeding device, is a computer system that can be operated independently and can be exchanged, and can be integrated into the rack to become a rack-and-stack rack 'And the chassis of the money frame is generally made of metal materials, and the bulk is also bulky. In the past, the rack feeding device case body, the == body is placed on the chassis of the biliary device, so that the plurality of openings of the cover body are aligned with the plurality of openings on the chassis, and then the cover body is replaced by a plurality of screws. On the chassis of the server, 'the cover of the rack feeder occupies 12 and the weight', so the operator often makes the screw t" it is difficult to align the opening, which affects the work efficiency, (4) the plural opening and The setting of a plurality of screws also causes an increase in cost. =遂 Some people suggested that the cover and the body of the guard should not be used. # Referring to Figure 1A, the chassis is located inside the chassis 1 and has a hook 12 on the side wall and a port 2, which is located on the machine. And a pushing portion 14 for applying a force to the cover is provided. The through hole 131 of the body 13 and the cover for referring to FIG. 1B, the cover 13 is provided with elastic 19760 5 1311898 corresponding to the through hole ΐ3ι, and the piece 132' is one end of the elastic piece 132 being a fixed end 132& The lower end of the body 13 and the other end are the engaging ends (four)' for correspondingly engaging with the hooks 12 of the inner panel of the chassis, and a pressing portion is formed between the two ends, and the position of the pressing portion 132c is Corresponding to the rail i3i of the cover 13 and exposed upward. As shown in the figure, the hook 12 fixed at one end to the inner side wall of the casing is provided with a substantially arc-shaped snap portion m' at the other end and is engaged with the engaging end of the elastic piece 132. 132b. : At the same time, refer to Figure 1A and (4). When implemented, the cover will be covered; ΓΓ32 will be pushed on the mountain 1 'and toward the front cover 11'. Then the above-mentioned bombs will be contacted to the inside of the chassis 1. The buckle of the wall,. It is said that the force of advancement continuously acts to elastically deform the elastic piece of the yam, and the card holder + part (2) is slid to simultaneously buckle down to the buckle portion (2), and The cover 13 is fixedly disposed on the chassis i. Please refer to the 1C and 1st drawings, and the relative ' must be from the cover 13 of the body of the magic body! 32c downwards and drives the elastic piece to receive, so that the card 硿Ha ▼ 抨 抨 "The green piece 132 is elastically deformed, so that the card 4 _ escaping the buckle portion 12 pushes the cover 13 outward, and the knife pushes the 邛14 is pushed out by π, and the cover body 13 is detached from the chassis 行 to avoid the need to use screws and tools to move down. (4) Elasticity - elastic cover 3, must - side to side In order to push the cover 13 outward, the second side is forced to push, and it may be due to the downward pressure. <Extremely laborious, and the %% of the material is excessively combined with the push action 19760 6 1311898 - Improper Damage to the elastic piece 132 and the hook 12 is quite inconvenient. Therefore, how to develop a cover fixing mechanism to solve the above-mentioned various shortcomings of the prior art is an urgent problem to be solved today. - SUMMARY OF THE INVENTION In view of the above disadvantages of the prior art, the main object of the present invention is to provide a labor-saving and easy-to-operate cover fixing mechanism. Still another object of the present invention is to provide a cover fixing mechanism that can be quickly assembled and disassembled. • Ben, Ming Fu - The purpose is to provide a cover fixing mechanism that does not require the use of tools for disassembly. The purpose of the present invention and other related purposes are as follows: The present invention provides a cover body having a through hole, an open cover of the phase, and the 疋 疋 构 includes: a stop portion disposed at the (four) heart “The 'operational part' is located in the through hole and can be pivotally connected to the cover body. • The operation end is provided for positioning: the two ends and the abutting end '-^ 43⁄4 , , the stop The hook of the cymbal can be attached to the cover _ 彳 surface, and I have and and the fixed branch p qi, ^ _ has a dog extending into the through hole and supporting the abutment end Providing the resetting elasticity of the operating member after opening. The cover system on both sides of the hole is correspondingly located between the through ends, and the t?/side is located between the operating end and the first joint portion and the first Two = two, "B is coupled to the cover through the joint. The hook material can be pivotally connected, a guide surface facing the stop portion and a face facing back to 19760 7 1311898 The first joint portion may be provided with a stopper, and the operation portion 5, "" may have a side for positioning, so that when the operation member 掀=one limb angle, the position is better by Up to the broadcast block, the angle of the opening of the (four) piece is preferably smaller than the angle of the opening. The operating end of the Hai operating member may be provided with a recess for easy operation, and the cover may be provided with a pair of inverted shutters. In the preferred embodiment; ^ (4) notch and inwardly elastic I and the cover body (4) = end is provided with a shaft joint, and by the - shaft ~ side and corresponding to the shield of the shaft 11 and the joint portion and the shutter joint portion, so that the two shutters can be pivoted inwardly to the lid body. Preferably, the shaft is sleeved with a spring f to provide an elastic force for the shutter to retain the cover. In the cover and fixed operation of the body, the slot is designed to face the chassis V on the chassis; the hook portion of the push rail (4) abuts against the inner side of the chassis; the direction _, and the guiding surface of the hook Guided by two: Hunting by the propulsion power to the broadcast section, at the same time = pass =: the fixed surface fishing stop, the 冢 冢 冢 刖盍 刖盍 刖盍 刖盍 刖盍 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。. In contrast, when the cover body is disassembled, the shutter is separated from the operating member to make the two gaps, and the three plates are used to move the operating end of the operating member and force the wrestling to push down. The shrapnel, at the same time, the sin of the manipulator is abutting on the positioning side force fulcrum of the first m54 of the first joint 1, and the user applies the force to the manipulator and the cover 19760 8 1311898 - The body is removed from the chassis. The body fixing mechanism of the present invention is determined by controlling the operating member. Or the detachment of the inner side of the chassis, and the cover body can be freely moved and the opening of the chassis can be closed, and the utility model can realize the effect of saving the cover body of the 2 sets of the cover body in the chassis, in addition to having overcome At the same time, by the elastic deformation of the shutter to the operating member, the recess of the touch-operating member can be shielded to prevent dust or foreign matter from falling in, and the cover is removed. The bamboo pressure shutter and the two steps of operating the operation member can prevent the cover body from being unlocked due to the accidental touch of the remote operation member. [Embodiment] The embodiments of the present invention are described below by way of specific examples, and those skilled in the art can readily understand other advantages and effects of the present invention from the disclosure of the present disclosure. x Referring to FIG. 2A, a perspective exploded view of the cover fixing mechanism of the present invention is shown. The chassis 2 is fixed with a front cover 21, and its position and size are aligned with the cover 3, and the cover 3 is When the cover is fixed to the chassis 2, the front cover 21 abuts against each other, and the chassis 2 is closed. The inner surface of the casing • the surface 22 is provided with, for example, a stopper portion 22 of the column body, and the through hole 31 is provided in the cover body 3, and the first inner side surface of the through hole 31 is vertically disposed at the inner side of the collision portion 221 The joint portion 32 and the shutter joint portion 33. The fixing mechanism includes a stopping portion 221, an operating member 5, and a spring piece 4'. The operating member 5 is located in the through hole 31 and can be connected to the cover body 3, and is defined by the opposite side. The operating end 52 and the abutting end 54 are provided at the operating end 52 for positioning the hook portion 221, and 9 19760 1311898 can be used to open the operating member 5 to make the (4) 5, 221; the elastic piece 4 It is fixed in the phase stop portion. The through hole 31 supports the inner surface of the abutting end 54 and has a return elasticity protruding to the operating member 5. The middle portion of the body 3 is fixed to the inner side of the body 3 by means of splicing, riveting or latching, and the other end is a support portion, and the line-direction extends to the through hole 31. Location.邛 - The operating member 5 is provided with a second joint portion 5 of the first joint portion 32 on the opposite side edges: ::: has a perforation. The joint portion 51 of the operating member 5 has a fishing portion 53 extending downwardly. The hook portion 53 is downwardly extended. Face to face; to (10) 54. In this implementation, a slab-like cover is added.
端係為軸接部6卜以供該轴⑽穿設其中而樞 〇又於通孔3 1之遮板結合邱q η 士^_A 瓣係套設有扭力彈著^叫於該袖接部61之兩 請參閱第2B圖，係顯示將上述各部件組設於蓋體3 之部分剖面立體圖。如圖中所示’前述通孔31之第一結 合部32係具有穿孔並朝通孔31内延伸有播塊咖，而言; 第~結合部32可藉由螺栓321之穿設而與操作件$之第 二結合部51樞接在—起，以使操作件5樞擺於通孔31 中’其中’該第二結合部51具有定位用側邊5U，係面 向於前述擋塊322並背向於擋止部221。該操作件5之抵 靠端54係抵接於彈片4之支撐部41，並受到該支撐部41 19760 1311898 ^支撐。前述之遮板4係樞設於通孔31之遮板結合部 •33 ’而套砂軸接部61兩端之扭力彈簧㈡，其—端係抵 ‘接於遮板6下表面’另—端係抵接於相對側之蓋體3内側 面’以使該遮板31保持彈壓於該操作件5之狀態。 請參閱第2G圖至f 2EW，_示該蓋體3進行鎖固 操作之侧視剖面圖。首先，將蓋體3朝前蓋21方向推進 至钩部53之引導面531接觸到設於機箱内側面22之擔止 ^ 22卜則隨著推動之力量持續地作用，該鈎部μ可藉 」丨導面531之引導而向上滑動，進而帶動操作件5之抵 罪端54向下彈麗該彈片4之支撐部41，待蓋體3推動至 使鈎部53之固定面532鈎止於該播止部221時，則操作 件5之抵㈣54係受到該支撐部41則單之力量作用而回 復至原始位置，在此同時，該蓋體3亦抵接於 進而完成蓋體3之鎖固。 風 β請參閱第3圖，相對地，於拆卸該蓋體3時，僅需下 該遮板6 ’使遮板6離開操作件5而使兩者間形成1 隙，此時，即可藉由該空隙而撥動該操作件5之操作= 52並施力使該操作件5作樞擺運動，則該鈎部53之固定 面532得以離開該擋止部221，且令操作件5之抵靠端^ 向下抵推彈片4之支撲部41，並使操作件5之第_纟士人 部51的定位用側邊511抵接於第一結合部32之擋塊1 σ 322 ’而於二者接觸之位置形成施力支點，則使用者可麵 易地藉由該操作端52施力而將該蓋體3卸除於機箱上二 上述實施例僅為例示性說明本發明之原理及其功 19760 11 1311898 效’而非用於限制本發明。任何 知 仕何热自此項技藝之人士均可 ‘在不逆月本發明之精神及範蜂 •冑繳儿 仞砰汉靶可下，對上述實施例進行修飾 又化。因此，本發明之權利 表，應以後述之申請 專利祀圍為依據。 【圖式簡單說明】 第1A圖係顯示習知蓋體固定機構之立體圖； 第1B圖至第1D圖係顯示習 卸除狀態之部份剖面立體圖；白盍體固疋機構之組裝/ ^ ;第2A圖係顯示本發明之蓋體固定機構之立體分解 第2B圖係顯示本發明之蓋體固 體圖； 賊稱之。卩分剖面立 第2C圖至第2E圖係顯示本發明之蓋體固 鎖固操作之剖視圖；以及 起構進行 第3圖係顯示本發明之蓋體固定機構 之剖視圖。 卸除操作 .【主要元件符號說明】 I、 2 機箱 II、 21前蓋 12 卡鈎 121 卡扣部 13、3 蓋體 131、31通孔 132 彈性片 l32a 固定端 19760 12 1311898 132b 卡合端 ，132c 彈壓部 ‘14 推動部 22 機箱内側面 221 擋止部 3 蓋體 31 通孑L 32 第一結合部 ^21 螺栓 322 擋塊 33 遮板結合部 4 彈片 41 支撐部 5 操作件 51 第二結合部 511 定位用侧邊 52 操作端 •53 鈎部 531 引導面 532 固定面 54 抵靠端 6 遮板 61 軸接部 62 轴 63 扭力彈簧The end is the shaft joint portion 6 for the shaft (10) to be inserted therein, and the pivoting plate and the shutter plate of the through hole 3 1 are combined with the Qiu q η 士 ^ _ A VALVE sleeve is provided with a torsion bombing ^ is called the sleeve portion Referring to Fig. 2B, a partial cross-sectional perspective view in which the above-described respective components are assembled to the lid body 3 is shown. As shown in the figure, the first joint portion 32 of the through hole 31 has a through hole and extends into the through hole 31, and the first joint portion 32 can be operated by the bolt 321 The second joint portion 51 of the member $ is pivotally connected to pivot the operating member 5 in the through hole 31. The second joint portion 51 has a positioning side 5U facing the aforementioned stopper 322. It faces away from the stopper 221 . The abutting end 54 of the operating member 5 abuts against the supporting portion 41 of the elastic piece 4 and is supported by the supporting portion 41 19760 1311898. The aforementioned shielding plate 4 is pivotally disposed on the shielding plate joint portion 33 of the through hole 31 and the torsion spring (2) at both ends of the sand receiving shaft connecting portion 61, the end portion of which is connected to the lower surface of the shielding plate 6 The end portion abuts against the inner side surface ' of the cover 3 on the opposite side to keep the shutter 31 in a state of being pressed against the operating member 5. Referring to Figures 2G through f 2EW, a side cross-sectional view of the cover 3 for locking operation is shown. First, the cover body 3 is advanced in the direction of the front cover 21 until the guide surface 531 of the hook portion 53 contacts the support surface 22 provided on the inner side surface 22 of the casing, and the hook portion μ can be borrowed continuously with the force of the push. The guide surface 531 is guided to slide upward, and the sinus end 54 of the operating member 5 is driven downward to slide the support portion 41 of the elastic piece 4, and the cover body 3 is pushed until the fixing surface 532 of the hook portion 53 is hooked thereon. In the case of the splicing portion 221, the abutting (four) 54 of the operating member 5 is returned to the original position by the force of the supporting portion 41, and at the same time, the cover 3 is also abutted to complete the locking of the cover 3. . For the wind β, please refer to FIG. 3 . In contrast, when the cover 3 is removed, the shutter 6 ′ is only required to move the shutter 6 away from the operating member 5 to form a gap between the two. When the operation of the operating member 5 is performed by the gap and the force is applied to pivot the operating member 5, the fixing surface 532 of the hook portion 53 is separated from the stopping portion 221, and the operating member 5 is The abutting end ^ is pressed downward against the baffle portion 41 of the elastic piece 4, and the positioning side 511 of the first gentleman portion 51 of the operating member 5 abuts against the stopper 1 σ 322 ' of the first joint portion 32. When the fulcrum is formed at the position where the two contacts, the user can easily remove the cover 3 from the chassis by applying the force from the operating terminal 52. The above embodiment is merely illustrative of the present invention. The principle and its function 19760 11 1311898 are not intended to limit the invention. Anyone who knows how to excel from this skill can ‘reform and modify the above embodiment under the spirit of the invention and the target of the bee. Therefore, the scope of the present invention should be based on the patent application scope described later. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a perspective view showing a conventional cover fixing mechanism; FIGS. 1B to 1D are partial sectional perspective views showing a disassembled state; assembly of a white body fixing mechanism / ^ ; Fig. 2A is a perspective view showing the solid body of the cover fixing mechanism of the present invention. Fig. 2B is a view showing the solid state of the cover of the present invention; Sections 2C to 2E are cross-sectional views showing the lid body fixing operation of the present invention; and Fig. 3 is a cross-sectional view showing the lid fixing mechanism of the present invention. Dismounting operation. [Description of main components] I, 2 Chassis II, 21 front cover 12 Hooks 121 Retaining parts 13, 3 Covers 131, 31 Through holes 132 Elastic piece l32a Fixed end 19760 12 1311898 132b Engagement end, 132c Elastic part '14 Pushing part 22 Chassis inner side 221 Stop part 3 Cover body 31 Pass L 32 First joint part ^21 Bolt 322 Stop 33 Shutter joint 4 Spring piece 41 Support part 5 Operation piece 51 Second combination Portion 511 Positioning side 52 Operating end • 53 Hook 531 Guide surface 532 Fixing surface 54 Abutment end 6 Shutter 61 Shaft connection 62 Shaft 63 Torsion spring