1288279 ,. 龜 九、發明說明： 【發明所屬之技術領域】1288279 ,. Turtle Nine, invention description: [Technical field to which the invention belongs]
本發明涉及一種應用於液晶顯示裝置之背光系統和其光學片 定模組。 X 【先前技術】 由於液晶顯示器面板之液晶本身不具發光特性，因而，爲達到顯 示效果，需給液晶顯示器面板提供一面光源裝置，如背光系統，其作 用在於向液晶顯示器面板供應亮度充分並且分佈均勻之面光源。 背光系統一般包括背光源、複數光學片以及用於容納及固定上述 馨元件之固定模組。該複數光學片包括導光板、擴散片、棱鏡片、集光 片等，主要用於調整背光系統之出射均勻性。 請參閱第一圖，先前技術揭示一種用於固定光學片之固定模組 _ 10，其包括一金屬框架12和一收納框14。該框架12爲一矩形之框蓋 結構，其包括一底面122和一端與該底面122相連之四個邊框124。 其中，該框架12之複數邊框124頂部分別設有複數定位銷126。該收 納框14爲一具有一矩形開口之框體結構，其尺寸與該框架12相配， 並可套設於該框架12之邊框124上。該收納框14之框體對應該複數 定位銷126處開設複數定位孔146。 φ 凊一併參閱第一圖和第二圖，該收納框14可配置在該框架12之 四邊框124之頂部’且該收納框14之兩相對邊框之框寬尺寸比該框 架12之相應邊框124之框寬尺寸稍大，其主要作用在於職預固定 光學片16。 請參閲第三圖，該預固定光學片16設置在該收納框14之表面。 該預固定光學片16對應該複數定位銷126處開設複數定位孔166。該 框架12之定位銷126穿過該收納框14和該預固定光學片16之定位 孔146、166,從而固定該預固定光學片16。 、惟’由於該光學片固定模組需要定位銷同時固定收納框和預固定 光予片故組裝較複雜，而且該框架之邊框和收納框需要留有設置定 位銷或粒位置，故，其框寬尺寸_般較大，使湘定_有效尺寸 1288279 之光學片所需之空間增大， 外型尺寸增大。 從而令使用該固定模組之背光系統之額緣 有鑒於此，提供一種組裝簡單， 定模組和背光系統實爲必要。【發明内容】 且具有較小框寬尺寸之光學片固 下面將以實施例說明-種組裝簡單，且具有較小框寬尺寸之光學 片固定模組，以及一種採用該光學片固定模組之背光系統。 予 -種光學片固定裝置，其包括—框架，該框架包括一底面和一端 與該底面減之四個邊框，雜架之至少兩械邊框上端各設有至少 折·弯部，該折彎部包括-自該邊框延伸並向該框納側彎曲之第一 支撐部和-自該第-支撐部延伸並朝該底面相反方向f曲之第二支 撐部；和一收納框，該收納框包括一框體和沿該框體底部延伸之突出 部’且該突出部設有至少一個與該折彎部相對應之凹槽，該凹槽被嵌 入該邊框之折彎部，該收納框之框體被該框架折彎部之第一支撐部所 支擇，該收納框之突出部用於收納預固定光學片。 一種背光系統，其包括一擴散板，複數光源和一光學片固定裝 置’該光學片固定裝置包括一框架，該框架包括一底面和一端與該底 面相連之四個邊框，該框架之至少兩相對邊框上端各設有至少一折彎 部’該折彎部包括一自該邊框延伸並向該框架内側彎曲之第一支撐部 和一自該第一支標部延伸並朝該底面相反方向彎曲之第二支樓部，該 複數光源设置於該框架底面；和一收納框，該收納框包括一框體和沿 該框體底部延伸之突出部，且該突出部設有至少一個與該折彎部相對 應之凹槽，該凹槽被嵌入該框架邊框之折彎部，該收納框之框體被該 框架折彎部之第一支撐部所支撐，該收納框之突出部用於收納預固定 光學片。 與先前技術相比較，該光學片固定裝置之框架和收納框由於採用 折彎部結構互相夾持固定，故無需於該框架之邊框和收納框之框體設 置佔用較大空間之定位銷或定位孔，從而該框架之邊框和收納框之框 體可設計較小框寬尺寸之結構，此設計可滿足採用該光學片固定裝置 1288279 2光rur之外型需求。而且，由於該光學片固定裝置結構 間早，故’縣學㈣絲置和背糕統具核賴便之優點。 【實施方式】 下面將結合附圖和實施例對本發明之光學片固定装置 光學片固定裝置之背衫統作進—步之雜說明。 ’和採用該The present invention relates to a backlight system applied to a liquid crystal display device and an optical sheet fixing module thereof. X [Prior Art] Since the liquid crystal of the liquid crystal display panel itself does not have the illuminating property, in order to achieve the display effect, the liquid crystal display panel needs to provide a light source device, such as a backlight system, which functions to supply the liquid crystal display panel with sufficient brightness and uniform distribution. Surface light source. The backlight system generally includes a backlight, a plurality of optical sheets, and a fixed module for accommodating and fixing the above-mentioned singular elements. The plurality of optical sheets include a light guide plate, a diffusion sheet, a prism sheet, a light collecting sheet and the like, and are mainly used for adjusting the uniformity of emission of the backlight system. Referring to the first figure, the prior art discloses a fixing module 10 for fixing an optical sheet, which comprises a metal frame 12 and a storage frame 14. The frame 12 is a rectangular frame cover structure including a bottom surface 122 and four frames 124 connected at one end to the bottom surface 122. Wherein, the top of the plurality of frames 124 of the frame 12 are respectively provided with a plurality of positioning pins 126. The receiving frame 14 is a frame structure having a rectangular opening, the size of which is matched with the frame 12, and can be sleeved on the frame 124 of the frame 12. The frame of the storage frame 14 defines a plurality of positioning holes 146 corresponding to the plurality of positioning pins 126. Referring to the first and second figures, the storage frame 14 can be disposed at the top of the four frames 124 of the frame 12 and the frame width of the two opposite frames of the storage frame 14 is larger than the corresponding frame of the frame 12. The frame width of 124 is slightly larger, and its main function is to pre-fix the optical sheet 16. Referring to the third figure, the pre-fixed optical sheet 16 is disposed on the surface of the storage frame 14. The pre-fixed optical sheet 16 defines a plurality of positioning holes 166 corresponding to the plurality of positioning pins 126. The positioning pin 126 of the frame 12 passes through the receiving frame 14 and the positioning holes 146, 166 of the pre-fixed optical sheet 16, thereby fixing the pre-fixed optical sheet 16. However, since the optical sheet fixing module requires a positioning pin to fix the storage frame and pre-fix the light to the sheet, the assembly is complicated, and the frame and the storage frame of the frame need to have a positioning pin or a granular position, so the frame is The wide size is generally larger, which increases the space required for the optical sheet of Xiangding _ effective size 1288279, and the size of the outer shape increases. Therefore, in the light of the margin of the backlight system using the fixed module, it is necessary to provide a simple assembly, a fixed module and a backlight system. SUMMARY OF THE INVENTION An optical sheet having a small frame width and size will be described below with reference to an optical sheet fixing module having a simple assembly and having a small frame width, and a fixing module using the optical sheet. Backlight system. The optical sheet fixing device comprises a frame, the frame comprises a bottom surface and one end and the bottom surface are reduced by four frames, and at least two upper ends of the frame are respectively provided with at least a bent portion and a bent portion, and the bent portion is provided The first support portion extending from the frame and bent toward the frame side and the second support portion extending from the first support portion and f-direction opposite to the bottom surface; and a storage frame including the storage frame a frame body and a protruding portion extending along a bottom of the frame body; and the protruding portion is provided with at least one groove corresponding to the bent portion, the groove is embedded in the bent portion of the frame, the frame of the storage frame The body is defined by the first support portion of the frame bending portion, and the protruding portion of the storage frame is for accommodating the pre-fixed optical sheet. A backlight system comprising a diffusing plate, a plurality of light sources and an optical sheet fixing device. The optical sheet fixing device comprises a frame, the frame comprising a bottom surface and four frames connected to the bottom surface at one end, at least two opposite sides of the frame The upper end of the frame is provided with at least one bent portion. The bent portion includes a first supporting portion extending from the frame and bent toward the inner side of the frame, and a first extending portion extending from the first supporting portion and bending in the opposite direction to the bottom surface. a second branch portion, the plurality of light sources are disposed on a bottom surface of the frame; and a storage frame, the storage frame includes a frame body and a protruding portion extending along a bottom portion of the frame body, and the protruding portion is provided with at least one bend a corresponding groove, the groove is embedded in the bent portion of the frame frame, the frame of the storage frame is supported by the first support portion of the frame bending portion, and the protruding portion of the storage frame is used for accommodating Fixed optical sheet. Compared with the prior art, the frame and the storage frame of the optical sheet fixing device are mutually clamped and fixed by using the bent portion structure, so that it is not necessary to provide a positioning pin or positioning for occupying a large space in the frame of the frame and the frame of the storage frame. The hole, so that the frame of the frame and the frame of the storage frame can be designed with a small frame width, and the design can meet the requirements of using the optical plate fixing device 1288279 2 light rur. Moreover, since the structure of the optical sheet fixing device is early, the advantages of the county-level (four) wire-set and back-boiled cakes are eliminated. [Embodiment] Hereinafter, the back sheet of the optical sheet fixing device of the optical sheet fixing device of the present invention will be described in detail with reference to the accompanying drawings and embodiments. And adopting
請-併參閱第四圖至第六圖，其係本發明光學片固定裝置之較佳 實施例。該光學片固絲置4G包括_框架41和―收納框43。該框架 41包括-矩形底面411和-端與該底面411相連之四個邊框412，其 中兩相對邊框412上端分別設有間隔之兩折彎部413，該折彎部413 包括-自該邊框412延伸並向該框架41内側彎曲之第一支標部414 和-自該第-支擇部414延伸並朝該底面411相反方向彎曲之第二支 樓部415。該第-支採部414低於該邊框412之頂端，而該第二支擇 部415頂端略高於該邊框Μ?之頂端。 該收納框43包括一框體431和-沿該麵431底部並向内側延 伸之犬出4 433 ’且該突出部433設有至少-個與該折彎部413相對 應之凹槽435。該收納框43之框體431之邊長略小於該框架41之四 個邊框412之長度，並可配置於該四個邊框412之内側。 請一併參閲第七圖至第十圖，當該收納框43從該邊框412上方 =下壓入該框架41時，該收納框43之框體431之凹槽435被嵌入該 ，框412之折彎部413，其中，第一支撲部414支撐該收納框43之框 431。該第一支樓部414向該框架41内側彎曲之長度略等於該收納 框43之框體431之框寬長度，故，該邊框412之第二支撲部415即 可限制該_框43向關飾，又可起顧定該收練43於該框架 ^之邊框412上端内側之作用。該收納框之突出部4泊用於收納預固 定光學片44。 凊一併參閱第四圖和第十一圖，本實施之光學片固定裝置還可進 一步包括一外框架45,用於進一步固定預固定光學片44，收納框“ 和該框架41。該外框架45包括-上底面451和-端與該上底面451 相連之四個邊框452，且該上底面451開設有一開口，並形成四個上 1288279 =邊緣’制Π胳露麟顧絲封。該上底錢緣之寬度略 =該框架41之折彎部413向内姆曲之長度。該外框架45之邊框 452和該框架41之邊框412之分別設置相應之鎖緊 當雛架41和收納框43固定好預固定光學片44 ^該)外框 架45配置於該框架41之上方並部分⑽該框架41之邊框412。該外 =45之邊框452和該框架41之邊框412通過鎖緊裝置（圖未示)使 該框架41和該外框架45相互鎖緊。其中，該框架41之折弯部413 =支:t415頂觸該外框架45之上底面邊緣，該預固定光學板 d之上底面邊緣之間留有—安全間隙用於防止 片受到外框架變形所導致光學片異常壓迫。 本實加例之框架41、收納框43和外框架45均採用金屬材質。本 施之光子片固疋裝置之框架41和收納框43由於採用折彎部結構互 相夾持固定，故無需於該框架41之邊框412和收納框心之框體431 設置佔用較大空間之定位銷或定佩，從而該框架41之邊框4 收納框43之框體431可設計較小框寬尺寸之結構。 可以理解，本實施之麵定光學片44並不限於單個光學片，其 可包括擴散片、棱鏡片、偏光片和集光片等單個或複數組合光學片了 本實施之鎖緊裝置包括卡扣結構或者螺孔螺絲裝配結構等。本發明之 框架也可設計成非矩形之底面和複數邊框結構，相應之至少一相對之 邊框上端可形成至少-折彎部。相應之，收納框及外轉應作適當改 變。 請參閱第十二®，本發㈣光祕之較佳實施例。該背光系統⑼ 包括-擴散板64 ’複數光源62和一光學片固定裝置(未標示）。該光 學片固定裝置與上述較佳實施例之光學片固定裝置4〇相類似。該 子片固定裝置包括-框架51，該框架51包括一底面511和一端與該 底面511相連之四個邊框512，該框架51之兩相對邊框512上端各嘹 有兩折弯部513，該折彎部513包括一自該邊框512延伸並向該框架 内側彎曲之第▲-支撐部514和一自該第一支撐部514延伸並朝該底面 511相反方向弯曲之第二支採部515，該複數光源62設置於該框架μ 1288279 片？所形成之腔體内;和一收納框53，該收納框53包括-=未^和沿雛體底部延伸之突出部(未標示），且該突出部設 f部相對應之凹槽(®未示），該收_ 53配置於 512上端内侧並被該框架51之折彎部513之第一支撐部 ㈣ί實施之背光系統還包括一外框架65，其包括一上底面651和-端與該上底面651相連之四個邊框652，且該上底面651開設有一開 I „四個上底*邊緣，該開σ用於露出該擴散片64。該上底面 邊緣之寬度略大⑽轉51之折f部513向_料之長度。該外Please refer to the fourth to sixth figures, which are preferred embodiments of the optical sheet fixing device of the present invention. The optical sheet fixing wire 4G includes a frame 41 and a storage frame 43. The frame 41 includes a rectangular bottom surface 411 and four ends 412 connected to the bottom surface 411. The upper ends of the two opposite frames 412 are respectively provided with two spaced portions 413, and the bent portion 413 includes - from the frame 412 A first branch portion 414 that extends and is bent toward the inner side of the frame 41 and a second branch portion 415 that extends from the first-receiving portion 414 and is curved in the opposite direction to the bottom surface 411. The first support portion 414 is lower than the top end of the frame 412, and the top end of the second support portion 415 is slightly higher than the top end of the frame. The storage frame 43 includes a frame 431 and a dog 4 433 ′ extending along the bottom of the surface 431 and extending inwardly, and the protrusion 433 is provided with at least one groove 435 corresponding to the bent portion 413. The side of the frame 431 of the storage frame 43 is slightly smaller than the length of the four frames 412 of the frame 41, and can be disposed inside the four frames 412. Referring to the seventh to tenth drawings, when the storage frame 43 is pressed into the frame 41 from above the frame 412, the groove 435 of the frame 431 of the storage frame 43 is embedded therein, and the frame 412 is inserted. The bent portion 413, wherein the first flap portion 414 supports the frame 431 of the storage frame 43. The length of the first branch portion 414 bent toward the inner side of the frame 41 is slightly equal to the frame width of the frame 431 of the storage frame 43. Therefore, the second branch portion 415 of the frame 412 can restrict the frame 43 to The garnish can also be used to take care of the inside of the upper end of the frame 412 of the frame. The protruding portion 4 of the storage frame is housed for accommodating the pre-fixed optical sheet 44. Referring to the fourth and eleventh drawings, the optical sheet fixing device of the present embodiment may further include an outer frame 45 for further fixing the pre-fixed optical sheet 44, the housing frame "and the frame 41. The outer frame 45 includes four upper frames 452 connected to the upper bottom surface 451 and the end surface 451, and the upper bottom surface 451 defines an opening, and forms four upper 1288279 = edge 'Π Π 露 麟 顾 顾 。 。 。. The width of the bottom edge is slightly = the length of the bent portion 413 of the frame 41 to the inner koji. The frame 452 of the outer frame 45 and the frame 412 of the frame 41 are respectively set to lock correspondingly when the frame 41 and the storage frame are 43. The pre-fixed optical sheet 44 is fixed. The outer frame 45 is disposed above the frame 41 and partially (10) the frame 412 of the frame 41. The outer frame 45 of the frame 45 and the frame 412 of the frame 41 are passed through a locking device ( The frame 41 and the outer frame 45 are locked to each other, wherein the bent portion 413 of the frame 41 = branch: t415 touches the upper bottom edge of the outer frame 45, above the pre-fixed optical plate d There is a safety gap between the bottom edges to prevent the sheet from being deformed by the outer frame. The optical sheet is abnormally pressed. The frame 41, the storage frame 43, and the outer frame 45 of the present embodiment are made of a metal material. The frame 41 and the storage frame 43 of the photonic sheet fixing device of the present embodiment are mutually clamped and fixed by the bent portion structure. Therefore, the frame 431 of the frame 41 and the frame 431 of the storage frame are not required to be provided with a positioning pin or a fixed space for occupying a large space, so that the frame 431 of the frame 4 of the frame 41 can be designed with a small frame width. The structure of the size. It can be understood that the surface-defining optical sheet 44 of the present embodiment is not limited to a single optical sheet, and may include a single or a plurality of combined optical sheets such as a diffusion sheet, a prism sheet, a polarizing sheet, and a light collecting sheet. The device comprises a snap structure or a screw hole screw assembly structure, etc. The frame of the present invention can also be designed as a non-rectangular bottom surface and a plurality of frame structures, and at least one of the opposite frame upper ends can form at least a bent portion. The frame and the external rotation should be appropriately changed. Please refer to the twelfth, the fourth embodiment of the present invention. The backlight system (9) includes a diffuser plate 64' complex light source 62 and an optical sheet fixing device (not The optical sheet fixing device is similar to the optical sheet fixing device 4 of the above preferred embodiment. The sub-sheet fixing device includes a frame 51 including a bottom surface 511 and a fourth end connected to the bottom surface 511 The frame 512 has two bent portions 513 at the upper ends of the two opposite frames 512 of the frame 51. The bent portion 513 includes a first ▲-support portion 514 extending from the frame 512 and bent toward the inner side of the frame. The first support portion 514 extends and is bent toward the bottom surface 511 in a direction opposite to the bottom surface 511. The plurality of light sources 62 are disposed in the cavity formed by the frame μ 1288279; and a storage frame 53 for receiving The frame 53 includes a protrusion (not shown) extending along the bottom of the body, and the protrusion is provided with a corresponding groove (not shown) of the f portion, and the receiving portion 53 is disposed on the inner side of the upper end of 512 and is The backlight system implemented by the first support portion (4) of the bent portion 513 of the frame 51 further includes an outer frame 65 including an upper bottom surface 651 and four ends 652 connected to the upper bottom surface 651, and the upper bottom surface 651 opens with an opening I „ four upper bottoms*, the opening σ is used for dew The diffusion sheet 64. The width of the upper bottom edge is slightly larger (10) and the turn f portion 513 of the turn 51 is the length of the material. The outside
Hi之邊框652和該框架51之邊框512之分別設置相應之鎖緊裝 =(圖未示卜該外框架65之邊框652和該框架51之邊框512通過鎖 =裝置使該« 51和該外姉65相互鮮。其巾，該框架51之折 =部513之第二支推部515頂觸該外框架65之上底面邊緣該擴散 片64與該外轉65之上絲邊緣之卿有—安全_，用於防止擴 散片64受到外框架65變形所導致擴散片異常壓迫。 本實施例之光源62可採用複數冷陰極螢光燈管或複數發光二極 體:本實施例之背光系統6〇還可進—步包括—棱鏡片和—集光片依 次設於該擴散片64表面，並被該光學片固定裝置5〇所固定。 本發明之光學片固定裝置之框架和收納框由於採用折彎部結構 互相夾持固疋，故無需於該框架之邊框和收納框之框體設置佔用較大 二間之疋位銷或定位孔，從而該框架之邊框和收納框之框體可設計較 小框寬尺寸之結構，此設計可滿足採用該光學片固定裝置之背光系統 狹窄額緣之外型需求。由於該光學片固定裝置結構簡單，故，該光學 片固定裝置和背光系統具有組裝簡便之優點。該光學片固定裝置可提 供光學板與外框之安全間隙，可有效防止光學板受到外框變形所導致 之光學片異常壓迫。 綜上所述，本發明確已符合發明專利要件，爰依法提出專利申 請。惟，以上所述者僅為本發明之較佳實施例，舉凡熟悉本案技藝之 人士，於援依本案發明精神所作之等效修飾或變化，皆應包含於以下 1288279 之申請專利範圍内。 【圖式簡單說明】 第-圖係先前技術之光學片固定模組與預固定光學片之分解示 意圖。 第=圖係先紐術之絲#固定模組之組裝俯視圖。 第二圖係先前技術之光學片固定模組固定預固定光學片之組裝 俯視圖。 第四圖係本發明較佳實施例之光學片固定模組與預固定光學片 之分解示意圖。 • 第五圖係第四圖局部v之放大示意圖。 第六圖係第四圖局部¥1之放大示意圖。 第七圖係第四圖之光學片固定模組去除外框後之組裝俯視圖。 第八圖係第七圖沿VIII線之截面示意圖。 - 第九圖係第七圖沿IX線之截面示意圖。 第十圖係第七圖局部X之放大示意圖。 第十一圖係第四圖之光學片固定模組組裝後之局部截面示意圖。 第十二圖係本發明較佳實施例之背光系統之截面示意圖。 【主要元件符號說明】 光學片固定裝置4〇 框架 4卜51 收納框 43，53 預固定光學片 44 外框架 45，65 光源 62 底面 411 ， 511 邊框 412 ， 512 折彎部 413 ， 513 第一支撑部 414 ， 514 第二支撐部 415 ， 515 框體 431 突出部 433 凹槽 435 上底面 45卜 651 外框架邊樞 452 ， 652 擴散板 64The frame 512 of Hi and the frame 512 of the frame 51 are respectively provided with corresponding locking devices = (the frame 652 of the outer frame 65 and the frame 512 of the frame 51 are not shown by the lock = device to make the « 51 and the outer The 姊65 is fresh to each other. The towel, the second pushing portion 515 of the folding portion 513 of the frame 51 touches the upper bottom edge of the outer frame 65, and the diffusing piece 64 and the edge of the wire on the outer turn 65 are- The safety_ is used to prevent the diffusion sheet 64 from being abnormally pressed by the deformation of the outer frame 65. The light source 62 of the embodiment may be a plurality of cold cathode fluorescent tubes or a plurality of light emitting diodes: the backlight system 6 of the embodiment Further, the step further includes: the prism sheet and the light collecting sheet are sequentially disposed on the surface of the diffusion sheet 64, and are fixed by the optical sheet fixing device 5〇. The frame and the storage frame of the optical sheet fixing device of the present invention are adopted The structure of the bent portion is clamped to each other, so that it is not necessary to set a frame pin or a positioning hole occupying a large space between the frame of the frame and the frame of the storage frame, so that the frame of the frame and the frame of the storage frame can be designed. Small frame width structure, this design can meet the needs of this The backlight system of the film fixing device has a narrow frontal shape requirement. Since the optical sheet fixing device has a simple structure, the optical sheet fixing device and the backlight system have the advantages of simple assembly. The optical sheet fixing device can provide an optical plate and The safety gap of the outer frame can effectively prevent the optical plate from being abnormally pressed by the deformation of the outer frame. In summary, the invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. For the preferred embodiment of the present invention, equivalent modifications or variations made by those skilled in the art of the present invention should be included in the scope of the following claims 1288279. [Simplified Description] - The figure is an exploded view of the prior art optical sheet fixing module and the pre-fixed optical sheet. The first picture is the assembled top view of the fixed module. The second picture is the prior art optical sheet fixing module fixed pre- The assembled top view of the fixed optical sheet. The fourth figure is the decomposition of the optical sheet fixing module and the pre-fixed optical sheet according to the preferred embodiment of the present invention. The fifth figure is an enlarged view of the part v of the fourth figure. The sixth figure is an enlarged view of the part of the fourth figure, which is the first part of Fig. 1. The seventh picture is the assembled top view of the optical sheet fixing module of the fourth figure after removing the outer frame. The eighth figure is a schematic cross-sectional view of the seventh figure along line VIII. - The ninth figure is a cross-sectional view of the seventh figure along line IX. The tenth figure is an enlarged view of the part X of the seventh figure. FIG. 12 is a schematic cross-sectional view showing the backlight system of the preferred embodiment of the present invention. [Main element symbol description] Optical sheet fixing device 4 frame 4 4 51 storage frame 43,53 pre-fixed optical sheet 44 outer frame 45, 65 light source 62 bottom surface 411, 511 frame 412, 512 bent portion 413, 513 first support portion 414, 514 second support portion 415, 515 frame 431 protrusion portion 433 concave Slot 435 upper bottom surface 45 651 outer frame side pivot 452, 652 diffuser 64