1308127 九、發明說明： 【發明所屬之技術領域】 本發明係有關於-種包裝盒、緩衝裝置及板材 【先前技術】 筆記型電腦等電子產品在運送過程中，由於容易受到 外力撞擊而受損，因此對包裝結構的要求較為嚴苛。目前 較為常見的作法係在包裝盒中，提供多個緩衝裝置，例如 隔板、紙類或塑膠類襯料、塑膠填充泡綿、以及泡狀緩衝 =等’以避免電子產品於運送期間產生晃動而撞擊包裝盒 /進而保護包裝盒内之電子產品。然而，此些緩衝裝置 ㊉具有不平整的邊緣，因此容易割傷使用者。並且，塑膠 ^之緩衝裝置對於生態環境將造成不良影響。相對地，紙 類之緩衝裝置不僅可以降低對生態環境的衝擊，減少 所需要的空間，更具有成本上之競爭優勢。 目前，較為常用之紙製緩衝裝置的製作技術為利用模 製級。或者’依設計需求將紙板裁成 式形狀之板材，再折製及糊貼而成型。 農置2包裝盒常包含不同種類，且結構不對稱的的緩衝 因此，1加㈣裝置的生產組裝、運送、物料控管的成本。 何提供—種可以利錢類材料摺製而成，具 企=的外形與對稱的結構之緩衝裝置，是使用者所凝殷 【發明内容】 1308127 中緩之目的就是在提供一種包裝盒及緩衝裝置，其 衝擊：=以支撐與固定包裝倉内之物品，避免外界之 J罕力造成物品的損壞。 本發明之另-目的就是在提供_種緩衝裝置，可以利 用為類材料摺製而成，以符合環境保護之需求。 本發明之另-目的就是在提供一種緩衝裝置及板材， 匕緩衝裝置及板材具有平整的外形與對㈣結構，在運送 ^程、内部物料控管、以及生產組裝方面，均可簡化作業 程序。 根據以上所述之目的，提出一種包裝盒，包括有一盒 體及對稱設置於盒體内之至少二緩衝裝置。每一緩衝裝置 包括有一底板、二長邊側板、二短邊側板及至少二容置結 構。底板呈一矩形，長邊側板分別垂直連接於底板之二長 邊短邊側板分別垂直連接於底板之二短邊。容置結構相 對设置於底板、長邊側板及短邊側板所圍成的區域之間， 每一容置結構具有一凹部，此些凹部相互連接形成_容置 空間。 根據以上所述之目的，更提出一種緩衝裝置，包括有 —底板、二長邊側板、二短邊側板及至少二容置結構。底 板呈一矩形，長邊側板分別垂直連接於底板之二長邊，短 邊側板分別垂直連接於底板之二短邊。容置結構相對設置 於底板、長邊側板及短邊側板所圍成的區域之間，每一容 置結構具有一凹部’此些凹部相互連接形成一容置空間。 根據以上所述之目的，更提出一種板材，用以形成_ 緩衝裝置，板材包括有呈矩形之一底板，此底板具有二長 1308127 邊，一短邊’每_短邊具有一短邊側板連接於其上，底板 之每一長邊包括有—長邊側板及至少一容置結構。容置結 構包括-第一平板、一第二平板、一第三平板、一凹部側 板及凹部底板。第_平板、第二平板及第三平板依序連 接於長邊側板。凹部側板與凹部底板位於第一平板與第二 平板之严曰1 CO 側板與第一平板連接血 板連接，凹部側板與凹部底板連接。 …第 根據本發明—較佳實施例所述之包裝盒，其中緩衝裝 置可以支擇與固定包裝盒内之物品，避免外界之衝擊力造 成物品的損壞。 根據本發明—較佳實施例所述之包裝盒’其中緩衝裝 置之材質為紙類材料，可以符合環境保護之需求。 根據本發明一較佳實施例所述之包裝盒，其中緩衝裝 置具有平整的㈣’可以避免割傷使用者。 =據本發明—較佳實施例所述之包裝盒，其中緩衝裝 /、有至少-緩衝開口’可以獲得更佳的緩衝效果。 【實施方式】 保的要求為塑膠類材f，無法滿足環 包裳盒内常包含不⑽/邊緣，容易割傷使用者。此外， 緩衝裳置之生二::結構不對稱的緩衝裝置，造成 明揭露-種可：利l物料控管等成本提高。本發 w 、頜材料摺製而成，具有平整外型的 域裝置，可㈣免料㈣者。 i的 第1圖為本發明之—較佳實施例之包裝盒之示意圖。 7 1308127 參照第1圖，包裝盒100包括有各 u任啕通·體200及二個緩衝裝詈 300。每一緩衝裝置3〇〇具有一 令罝工間3 02，二個,缓衝奘 置300係對稱設置於盒體細内。包裝盒i⑻可用以容置 一物品柳，例如是筆記型電腦。舉 _之兩端設置於緩衝裝置3〇〇之容置空間3〇2内，接著， 將物品權及二個緩衝裝置3〇〇 一起襄入包裝盒刚内。 值得-提的是，本較佳實施例之包裝± 1〇〇内只需要對稱 地設置二個具有相同結構的緩衝裝置3〇〇於物品彻的兩 端，即可將物品彻穩固地容置於盒體内，以避免物 品400於運送期間產生晃動而撞擊盒體2〇〇。因此，本較佳 實施例之包Μ⑽只需要使用—種緩衝裝置，相較於= 他使用多個不同緩衝裝置的包裝盒，在運送過程、内部物 料控f、以及生產組裝方面，均可簡化作業程序。 第2圖為本發明之一較佳實施例之緩衝装置之結構示 思圖。第3圖為第2圖延A-A’之剖面圖。同時參照第2 圖及第3圖，緩衝裝置300之外型例如是一矩形體，包括 有一底板310、二長邊側板320、二短邊側板33〇及至少二 容置結構341a、341b。底板310例如是呈矩形，長邊側板 320垂直連接於底板310之長邊311，短邊側板33〇垂直連 接於底板310之短邊312。容置結構341a、341b相對設置 於底板310、長邊側板320及短邊側板33〇所圍成的區域之 間，容置結構341a、341b分別具有一凹部343，此些凹部 343相互連接形成容置空間302。值得一提的是，長邊側板 320、短邊側板330及容置結構341 a、341 b之外型可以依 P、?、所谷置物品的外型設計，底板3 10之外型可以是一正方 1308127 形’緩衝裝置300之外型亦可以是一正方體。1308127 IX. Description of the Invention: [Technical Field] The present invention relates to a packaging box, a buffer device and a sheet material [Prior Art] Electronic products such as a notebook computer are damaged by external force during transportation. Therefore, the requirements for the packaging structure are more stringent. At present, the more common method is to provide a plurality of buffering devices, such as separators, paper or plastic linings, plastic-filled foams, and bubble buffers, etc. to avoid sloshing of electronic products during transportation. And hit the box / and then protect the electronic products inside the box. However, such cushioning devices have an uneven edge and are therefore easy to cut the user. Moreover, the plastic buffer device will have an adverse effect on the ecological environment. In contrast, paper buffers not only reduce the impact on the ecological environment, reduce the space required, but also have a cost competitive advantage. At present, the more commonly used paper buffering device is manufactured using a molding stage. Or, according to the design requirements, the board is cut into a shape of the board, and then folded and pasted to form. The farmer 2 box often contains different kinds of buffers with asymmetrical structure. Therefore, the cost of production assembly, transportation, and material control of the 1 plus (4) device. What is provided? A kind of cushioning device that can be folded into a money-like material, has a shape and a symmetrical structure, and is a user's condensed body. [Inventive content] 1308127 The purpose of slowing down is to provide a package and a buffer. The device, its impact: = to support and secure the contents of the package, to avoid damage to the goods caused by the external force. Another object of the present invention is to provide a cushioning device which can be folded into a material to meet the requirements of environmental protection. Another object of the present invention is to provide a cushioning device and a sheet material. The buffering device and the sheet material have a flat outer shape and a (four) structure, and the operation procedure can be simplified in terms of conveyance, internal material control, and production assembly. In accordance with the above objects, a package is provided comprising a casing and at least two cushioning devices symmetrically disposed within the casing. Each of the buffering devices includes a bottom plate, two long side plates, two short side plates, and at least two receiving structures. The bottom plate has a rectangular shape, and the long side plates are vertically connected to the two long sides of the bottom plate, and the short side plates are vertically connected to the two short sides of the bottom plate. The accommodating structure is disposed between the bottom plate, the long side plate and the short side plate, and each of the accommodating structures has a recess, and the recesses are connected to each other to form an accommodating space. According to the above object, a buffer device is further provided, comprising: a bottom plate, two long side plates, two short side plates and at least two receiving structures. The bottom plate has a rectangular shape, and the long side plates are vertically connected to the two long sides of the bottom plate, and the short side plates are vertically connected to the two short sides of the bottom plate. The accommodating structure is disposed between the bottom plate, the long side plate and the short side plate, and each of the accommodating structures has a recessed portion. The recesses are connected to each other to form an accommodating space. According to the above object, a plate material is further provided for forming a buffer device, wherein the plate material comprises a bottom plate having a rectangular shape, the bottom plate has a length of 1308127 sides, and a short side has a short side side plate connection per short side. The upper side of the bottom plate includes a long side panel and at least one receiving structure. The accommodating structure includes a first plate, a second plate, a third plate, a recess side plate, and a recess bottom plate. The first plate, the second plate, and the third plate are sequentially connected to the long side plates. The concave side plate and the concave bottom plate are located on the first flat plate and the second flat plate. The severe side CO side plate is connected to the first flat plate connecting blood plate, and the concave side plate is connected to the concave bottom plate. The package according to the preferred embodiment of the present invention, wherein the cushioning device can select and secure the articles in the package to prevent damage from the external impact. According to the present invention, the packaging box of the preferred embodiment wherein the cushioning device is made of a paper material can meet the requirements of environmental protection. According to a preferred embodiment of the present invention, the cushioning device has a flat (four)' to avoid cutting the user. According to the invention, the package of the preferred embodiment wherein the cushioning/having at least a buffer opening' provides a better cushioning effect. [Embodiment] The requirement for the protection of the plastic material f is that it does not satisfy the ring (10)/edge, which is easy to cut the user. In addition, the buffering of the second generation:: the structural asymmetry of the buffer device, resulting in the disclosure of a kind of - can be: l l material control and other costs increase. The hair w and the jaw material are folded, and the device has a flat external shape, and can be (4) free material (four). BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view of a package of the preferred embodiment of the present invention. 7 1308127 Referring to Fig. 1, the package 100 includes a plurality of buffers 200 and two buffering devices 300. Each of the buffering devices 3 has a cubicle 3 02, and two buffering devices 300 are symmetrically disposed in the casing. The package i (8) can be used to accommodate an item, such as a notebook computer. The two ends of the _ are disposed in the accommodating space 3 〇 2 of the damper device 3, and then the article right and the two buffer devices 3 襄 are put together into the package box. It is worth mentioning that, in the package of the preferred embodiment, only two buffering devices 3 having the same structure are symmetrically disposed at the ends of the article, so that the articles can be firmly accommodated. In the casing, the article 400 is prevented from swaying during transportation and hits the casing 2〇〇. Therefore, the package (10) of the preferred embodiment only needs to use a buffer device, which can be simplified in the transportation process, the internal material control f, and the production assembly compared to the package in which he uses a plurality of different buffer devices. Operating procedures. Fig. 2 is a structural view showing a buffer device according to a preferred embodiment of the present invention. Fig. 3 is a cross-sectional view taken along line A-A' of Fig. 2. Referring to Figs. 2 and 3, the outer shape of the cushioning device 300 is, for example, a rectangular body including a bottom plate 310, two long side plates 320, two short side plates 33A, and at least two receiving structures 341a, 341b. The bottom plate 310 is, for example, rectangular, and the long side plate 320 is vertically connected to the long side 311 of the bottom plate 310, and the short side plate 33 is vertically connected to the short side 312 of the bottom plate 310. The accommodating structures 341a and 341b are disposed between the bottom plate 310, the long side plate 320, and the short side plate 33. The receiving structures 341a and 341b respectively have a recess 343. The recesses 343 are connected to each other to form a cavity. Space 302 is placed. It is worth mentioning that the long side side plate 320, the short side side plate 330 and the accommodating structures 341 a, 341 b can be designed according to the shape of the P, ?, and the contents of the valley, and the outer shape of the bottom plate 3 10 can be A square 1308127 shaped 'buffer device 300 can also be a square.
容置結構341 a及容置結構341 b係相對設置。容置結 構34la及容置結構34lb分別具有一第一平板342、一第二 平板344、一凹部側板346及一凹部底板348。第一平板342 與長邊侧板320垂直連接，第二平板344與第一平板342 垂直。凹部側板346與凹部底板348位於第一平板342與 第二平板344之間，凹部側板346與第一平板342垂直連 接，凹部底板348與第二平板344垂直連接◊凹部側板346 與凹部底板348垂直連接且形成凹部343 ^容置結構341& 及容置結構34lb更可包括一第三平板349，位於底板31〇 上，第三平板349與第二平板344垂直連接，用以使容置 結構形成更穩定的結構。 ”為了使緩衝裝置300可以提供更好的緩衝效果，第一 平板342具有-緩衝開σ 363設置於其上。緩衝開口如 例如是是-長條形開口，缓衝開σ 363之長度可以為緩衝 裝置300長度之約三分之二。 第4圖為本發明之一較佳實施例之緩衝裝置之板材示 意圖。參照第4圖，板# 5 〇 〇之材質較佳係選用料， 2如瓦榜紙、銅版紙等，且該材質（例如瓦愣浪 向係!木取賢壓（軸壓）設計’此舉可增強結構並輔助紙箱在 :堆疊之耐壓程度。板材可以是利用模具直接將紙 製成型’或者利用單一紙板裁切成型。板材谓在 免過折疊前，是—平整的紙板，在經過折疊的過程後， ::成緩衝裝置300。板材5〇〇包括有—底板31〇、二長 2〇、二短邊側板330及二容置結構341a、34ib。 9 1308127 更詳細而言，底板3 10例如呈矩形，底板3丨0之長邊 311依序連接長邊側板320、第一平板342、第二平板344 及第二平板349。長邊側板320與底板3 1 〇之間具有一第一 折線3 51 ’第一平板342與長邊側板3 20之間具有一第二折 線352’第二平板344與第一平板342之間具有一第三折線 353，第三平板349與第二平板344之間具有一第四折線 354。在第一平板342及第二平板344上形成有相互平行之 割縫361與割缝362。在第一平板342之上，割縫361與割 • 缝362之間具有一第五折線355,在第二平板344之上，割 縫361與割缝362之間具有一第六折線356及一第七折線 357。第一折線351、第二折線352、第三折線353、第四折 線354、第五折線355、第六折線356及第七折線357相互 平行，割縫361與第一折線351垂直。其中第五折線355、 第六折線356、第七折線357、割縫361及割縫362定義凹 部側板346及凹部底板348。 繼續參照第4圖，短邊側板33〇連接於底板31〇之短 • 邊312,短邊側板330與底板310之間具有一第八折線358。 短邊側板330具有至少一第一固定片332,連接於短邊側板 330 ’第一固定片332與短邊側板33〇間具有一第九折線 359。短邊側板330具有二第二固定片334，連接於短邊側 板330。第二固定片334與短邊側板330間具有一第十折線 360 ° 同時參照第2圖、第3圖及第4圖，板材5〇〇可以依 照以下步驟折疊’以形成緩衝裝置3〇〇。首先，依照第3 圖所示容置結構341 a之剖面結構折疊第三折線353及第四 10 1308127 折線354,並且折疊第五折線355、第六折線356及第七折 線357，以形成容置結構341a，並且以相同方式形成容置 結構341b。接著，折疊第一折線351及第二折線352，使 長邊側板320與底板31〇垂直，並且使容置結構及 341b位於底板310上方。 接著，折疊第八折線358、第九折線359及第十折線 360。使短邊側板33〇與底板31〇垂直，並且使第—固定片 332插入短邊側板33〇與長邊側板32〇之間，使第二固定片 334插入短邊側板33〇與第一平板342之間，以固定緩衝裝 置300的外型，並且使緩衝裝置3〇〇成為外型平整之矩形 體。由於板材500可為—對稱結構，位於底板31〇兩側之 結構可以依照相同的方法折疊形成，因此可以簡化緩衝裝 置300的折疊過程，此外，在運送過程、内部物料控管、 設計成本、以及生產組裝方面，均可簡化作業程序。 由上述本發明較佳實施例可知，本發明具有以下優點： 1·本發明之緩衝裝置可以支撐與固定包裝盒内之物 品，避免外界之衝擊力造成物品的損壞。 本毛月之緩衝裝置可以利用紙類 用料較少’可以符合環境保護之需求。 成 3. 本發明之緩衝垆署 使用者。 、一有平整的外型，可以避免割傷 4. 本發明之緩衝# 且可為一體丨π "及，、板材可為具有對稱的結構 且』马體成型，因此在谨这、a t 生產袓梦方而運一過程、内部物料控管、以及 生產組裝方面’均可簡化作業程序。 雖然本創作已以較佳每 孕乂仏Λ施例揭露如上，然其並非用以 11 1308127 限定本創作， 和範圍内，當 範圍當視後附 任何熟習此技藝者，在不脫離本創作之精神 可作各種之更動與潤飾，因此本創作之保護 之申請專利範圍所界定者為準。 【圖式簡單說明】 為讓本發明之上述和其他目的、特徵、優點與實施例 m明顯易懂’所附圖式之詳細說明如下： 第1圖為本發明之一較佳實施例之包裝盒之示意圖； 第2圖為本發明之一較佳實施例之緩衝裝置之示意圖； 第3圖為第2圖延A-A’之剖部圖；以及 第4圖為本發明之一較佳實施例之緩衝裝置之板材示意圖。 【主要元件符號說明】 100 :包裝盒 348 ： 凹部底板 200 :盒體 349 ： 第三平板 300 :緩衝裝置 351 ： 第一折線 302 :容置空間 352 ： 第二折線 3 10 .底板 353 ： 第’三折線 311 :長邊 354 ： 第四折線 312 :短邊 355 ： 第五折線 320 :長邊側板 356 ： 第六折線 330 :短邊側板 357 ： 第七折線 332 :第一固定片 358 ： 第八折線 334 :第二固定片 359 ： 第九折線 341a、341b :容置結構 360 ： 第十折線 12 1308127 342 ： 第一平板 361、 362 ：害丨j缝 343 ： 凹部 363 ： 缓衝開口 344 ： 第二平板 400 ： 物品 346 ： 凹部側板 500 ： 板材 13The accommodating structure 341 a and the accommodating structure 341 b are oppositely disposed. The accommodating structure 34la and the accommodating structure 34lb respectively have a first flat plate 342, a second flat plate 344, a concave side plate 346 and a concave bottom plate 348. The first flat plate 342 is vertically connected to the long side plate 320, and the second flat plate 344 is perpendicular to the first flat plate 342. The concave side plate 346 and the concave bottom plate 348 are located between the first flat plate 342 and the second flat plate 344, the concave side plate 346 is perpendicularly connected to the first flat plate 342, and the concave bottom plate 348 is perpendicularly connected to the second flat plate 344. The concave side plate 346 is perpendicular to the concave bottom plate 348. Connecting and forming the recess 343 ^ The accommodating structure 341 & and the accommodating structure 34 lb further includes a third flat plate 349 on the bottom plate 31 , and the third flat plate 349 is perpendicularly connected to the second flat plate 344 for forming the receiving structure More stable structure. In order for the buffer device 300 to provide a better cushioning effect, the first flat plate 342 has a buffer opening σ 363 disposed thereon. The buffer opening is, for example, an elongated strip opening, and the length of the buffer opening σ 363 may be The buffer device 300 is about two-thirds of the length. Figure 4 is a schematic view of a plate of a cushioning device according to a preferred embodiment of the present invention. Referring to Figure 4, the material of the plate #5 is preferably a material, 2 Such as Wabang paper, coated paper, etc., and the material (such as corrugated wave! Wood picking pressure (axial pressure) design') can enhance the structure and assist the carton in: stacking pressure resistance. The board can be utilized The mold is directly formed into a paper' or cut with a single piece of cardboard. The sheet is said to be a flat paperboard before being folded, and after being folded, :: is a buffering device 300. There are a bottom plate 31〇, a second length 2〇, two short side plates 330 and two accommodating structures 341a, 34ib. 9 1308127 In more detail, the bottom plate 3 10 is, for example, rectangular, and the long sides 311 of the bottom plate 3丨0 are sequentially connected. a long side panel 320, a first flat panel 342, a second flat panel 344, and The second flat plate 349. The long side plate 320 and the bottom plate 3 1 具有 have a first fold line 3 51 ' between the first flat plate 342 and the long side plate 3 20 has a second fold line 352', the second flat plate 344 and the first flat plate There is a third fold line 353 between 342, and a fourth fold line 354 is formed between the third flat plate 349 and the second flat plate 344. The first flat plate 342 and the second flat plate 344 are formed with parallel slits 361 and slits. 362. Above the first flat plate 342, a slit line 355 is formed between the slit 361 and the slit 362. Above the second flat plate 344, a sixth fold line 356 is formed between the slit 361 and the slit 362. And a seventh fold line 357. The first fold line 351, the second fold line 352, the third fold line 353, the fourth fold line 354, the fifth fold line 355, the sixth fold line 356, and the seventh fold line 357 are parallel to each other, and the slit 361 and the first The fold line 351 is vertical. The fifth fold line 355, the sixth fold line 356, the seventh fold line 357, the slit 361, and the slit 362 define the recess side plate 346 and the recess bottom plate 348. Referring to Fig. 4, the short side plate 33 is connected to the bottom plate. 31 〇 short • edge 312, between the short side panel 330 and the bottom plate 310 has an eighth fold line 358 The short side panel 330 has at least one first fixing piece 332 connected to the short side side plate 330. The first fixing piece 332 and the short side side plate 33 have a ninth folding line 359. The short side side plate 330 has two second fixing pieces 334. , the second fixing piece 334 and the short side side plate 330 have a tenth fold line 360 °. Referring to FIGS. 2, 3 and 4, the plate 5 can be folded according to the following steps. To form a buffer device 3〇〇. First, the third fold line 353 and the fourth 10 1308127 fold line 354 are folded according to the sectional structure of the receiving structure 341 a shown in FIG. 3 , and the fifth fold line 355 , the sixth fold line 356 and the seventh fold line 357 are folded to form the accommodation. Structure 341a, and accommodating structure 341b is formed in the same manner. Next, the first fold line 351 and the second fold line 352 are folded such that the long side panel 320 is perpendicular to the bottom plate 31, and the receiving structure and the 341b are positioned above the bottom plate 310. Next, the eighth fold line 358, the ninth fold line 359, and the tenth fold line 360 are folded. The short side plate 33 is perpendicular to the bottom plate 31, and the first fixing piece 332 is inserted between the short side plate 33〇 and the long side plate 32〇, so that the second fixing piece 334 is inserted into the short side plate 33〇 and the first plate. Between 342, the outer shape of the cushioning device 300 is fixed, and the cushioning device 3 is made into a rectangular body having a flat shape. Since the plate 500 can be a symmetrical structure, the structures on both sides of the bottom plate 31 can be folded in the same manner, thereby simplifying the folding process of the cushioning device 300, in addition, during the conveyance process, internal material control, design cost, and In terms of production assembly, the operating procedures can be simplified. It can be seen from the above preferred embodiments of the present invention that the present invention has the following advantages: 1. The cushioning device of the present invention can support and secure the contents of the package to avoid damage to the article caused by external impact. This Maoyue buffer can use less paper material to meet environmental protection needs. 3. The user of the buffer of the present invention. A smooth appearance can avoid cuts. 4. The buffer of the present invention # can be an integral 丨 π " and, the plate can have a symmetrical structure and the horse body is formed, so in this, at production The operation of the nightmare process, internal material control, and production assembly can simplify the operation process. Although this creation has been disclosed above in the preferred embodiment of pregnancy, it is not intended to limit the creation of this creation, and within the scope, when the scope is attached to any person familiar with the art, without departing from the creation The spirit can be used for various changes and refinements, so the scope of the patent application for protection of this creation shall prevail. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, advantages and embodiments of the present invention will become more apparent. 2 is a schematic view of a buffer device according to a preferred embodiment of the present invention; FIG. 3 is a cross-sectional view taken along line A-A' of FIG. 2; and FIG. 4 is a preferred embodiment of the present invention. Schematic diagram of the plate of the buffer device of the embodiment. [Description of main component symbols] 100: package 348: recessed bottom plate 200: case 349: third flat plate 300: buffer device 351: first fold line 302: accommodation space 352: second fold line 3 10 . bottom plate 353: Tri-fold line 311: long side 354: fourth fold line 312: short side 355: fifth fold line 320: long side panel 356: sixth fold line 330: short side panel 357: seventh fold line 332: first fixing piece 358: eighth Folding line 334: second fixing piece 359: ninth folding line 341a, 341b: accommodating structure 360: tenth folding line 12 1308127 342: first flat plate 361, 362: 丨 j slit 343 : concave portion 363 : buffer opening 344 : Two plates 400 : Item 346 : Recessed side panels 500 : Sheet 13