100年08月09日修正替换頁 1352837 I *r 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明是有關於一種隱形眼鏡用載盤，特別是指一種適 用真空成形製造的隱形眼鏡用載盤。 【先前技術】 [0002] 參閱第1圖及第2圖，分別為習知技藝隱形眼鏡之水化載 盤之組合圖及示意圖。水化載盤1用以容置複數隱形眼鏡 ，其包含一底壁11、一由底壁11周緣向上延伸之延伸壁 12及二設置於延伸壁12上之把手13，且延伸壁12上間隔 設置複數之導流孔121。底壁11上間隔設置複數略呈圓枉 形狀之容置槽111，且每一容置槽111兩兩相鄰接，並分 別與相鄰接之容置槽111界定出一孔隙116。容置槽111 具有一底壁112及一由底壁112之周緣向上延伸之圍繞壁 114。底壁11 2由外周緣朝中心向上弧形隆起，用以配合 隱形眼鏡14之形狀，並具有複數相間隔，並成輻射狀排 列之條狀形孔洞113。圍繞壁114具有複數間隔之限位部 115，係設置於圍繞壁114之頂面上。 [0003] 於進行水化時，將載盤1浸入一内含化合水之水化設備（ 圖未示），化合水由導流孔121、孔隙11 6及孔洞113進入 載盤1中，因而浸泡載盤1之隱形眼鏡14，使隱形眼鏡14 與水產生化合反應而形成含水之軟式隱形眼鏡。然而當 載盤1脫離水化設備時，由於孔洞113及限位部115之邊角 並非圓弧形，因此化合水中之雜質或結晶物容易附著於 孔洞113與限位部115之邊角而留置於載盤1中，因而污染 化合水而導致水化品質不穩定。當重複使用載盤1時，需 097120315 表單編號A0101 第3頁/共15頁 1003288692-0 1352837 100年08月09日梭正替換頁 進行複雜之清洗製程，此舉不但費時，且雜質或結晶物 仍可能因載盤1未清洗乾淨而仍附著於容置槽111中。再 者，由於水化載盤1因結構複雜，需以射出成形之方式所 製造，所以價格昂貴，造成生產成本南昂。且水化完成 之隱形眼鏡成品欲包裝出貨時，需重新設計載盤及包裝 盒體，生產成本將因此提高。 【發明内容】 [0004] 因此，本發明之目的，是在提供一種隱形眼鏡用載盤， 可以真空成形製造以降低生產成本，及當重複使用載盤 時，避免雜質及結晶物附著於載盤内而降低水化品質。 [0005] 本發明之另一目的，在於於載盤中設置複數相間隔之排 氣孔，使得位於排氣孔内之氣體得以排出，使隱形眼鏡 可充分浸泡水化。 [0006] 本發明之再一目的，在於利用真空成形之製程來製造載 盤，而得以降低生產成本。 [0007] 根據上述目的，本發明提出一種隱形眼鏡用載盤，其包 含複數容置槽、複數第一導流道及複數第二導流道。容 置槽係間隔設置於該載盤上，且每一容置槽係用以承載 隱形眼鏡。第一導流道係設置於載盤之側緣。第二導流 道係設置於載盤之容置槽間，使容置槽相連通。當載盤 浸入一液體中時，其藉由第一導流道及第二導流道流至 容置槽内，並浸泡隱形眼鏡。 [0008] 其中，本發明之隱形眼鏡用載盤更包含複數排氣孔，係 設置於載盤上容置槽之周圍。 097120315 表單編號A0101 第4頁/共15頁 1003288692-0 1352837 ♦ * [0009] [0010] [0011] [0012] [0013] 100年08月09日修正替换頁 其中，本發明之隱形眼鏡用載盤係為真空成形之方式所 製成。 < 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在以 下配合參考圖式之實施例的詳細說明中，將可清楚的明 白。 參閲第3圖及第4圖，分為本發明隱形眼鏡用載盤之第一 實施例之一立體圖及一組合圖。載盤3包含複數容置槽31 、複數第一導流道32、複數第二導流道33、複數第一突 起部35、複數凹陷部351、複數第二突起部36及複數第一 卡合部37。在此實施例中，載盤3、容置槽31、第一導流 道32、第二導流道33、第一突起部35、凹陷部351、第 二突起部36及第一卡合部37係以真空成形之製程一體成 形製造，且載盤3係以塑料材質所製成。在本實施例中， 塑料材質可為合膠（PET)、聚丙烯（PP)、聚苯乙烯（PS) 或聚氣乙烯（PVC)。 容置槽31略呈一圓滑形設計之中空圓柱體，具有一底壁 311及一由底壁311周緣向上延伸之圍繞壁312，且間隔 設置於之載盤3頂面上，並形成一陣列排列。底壁311為 一與隱形眼鏡4相適配之圓曲面。每一容置槽31承載一隱 形眼鏡4。為避免於水化過程時，經重複使用之載盤3， 因雜質或結晶物附著於容置槽31内，底壁311及圍繞壁 312之接合處為弧形導角，使雜質或結晶物得以順利隨一 液體流出於容置槽31外。 第一導流道32係為一柱狀凹槽，間隔設置於載盤3之側緣 097120315 表單編號A0101 第5頁/共15頁 1003288692-0 1352837 _ 1100年08月09日修正替换頁 ，用以將液體導入載盤3中。在此實施例中，液體係以化 合水30來實施。 ’ [0014] 第二導流道33設置於載盤3之容置槽31間，使容置槽31可 藉由第二導流道33兩兩相連通。 [0015] 第一突起部35略呈一内部中空之圓柱形，係間隔設置於 載盤3之頂面上並形成一陣列排列。 [0016] 凹陷部351略呈一内部中空之圓柱形，係間隔設置於載盤 3之頂面上並形成一陣列排列，且凹陷部351係與第一突 起部35間隔交錯，並於底面開設一排氣孔（圖未示）。 [0017] 第二突起部36略呈一内部中空之長方體形，係間隔設置 於載盤3之側緣，且每兩第二突起部36之間界定出一導流 部321，並與第一導流道32間隔錯置。導流部321係用以 導引化合水30經由第一導流道32進入容置槽31。為了順 利排除容置槽31内之空氣，於承載板3真空成形後，每一 第一突起部35及第二突起部36之頂面經後加工之開孔處 理而選擇性設置一排氣孔34。 [0018] 當隱形眼鏡4進行水化時，將複數載盤3相互交錯疊合， 使位於上方之載盤3先水平旋轉180度後，再疊合至下方 之載盤3 »藉由此交錯疊合之設置，上方載盤3之凹陷部 351之底面將頂抵於下方載盤35之第一突起部35之頂面， 使下方載盤3得以支撐上方載盤3，且凹陷部351之排氣孔 與第一突起部35之排氣孔34相對應。當上下載盤3交錯疊 合時，上方載盤3之第二導流道33將卡抵於在下方載盤3 側緣處及第二突起部36之間。 097120315 表單編號A0101 第6頁/共15頁 1003288692-0 1352837 • · [0019] 1100年08月09日修正替换頁j 當載盤3置於〆水化設備39内時，化合水30依序藉由第一 導流道32、導流部321及第二導流道33流入容置槽31内 ，並浸泡位於容置槽31内之隱形眼鏡4。當化合水30進入 容置槽31後，下方載盤3之容置槽31内之氣體將受化合水 3〇之撥壓，而依序經由下方載盤3第一突起部35之排氣孔 34、上方載盤3凹陷部351之排氣孔排出於上方載盤3外， 因此容置槽31之氣體得以完全排出，而使隱型眼鏡4得以 完全浸入於化合水中30而能充分浸泡水化。 [0020] 當水化完成時，將載盤3之一側傾斜於水平面，此時容置 於容置槽31内之化合水30將依序由第二導流道33 '導流 部321及第一導流道32導離於載盤3。由於底壁311及圍 繞壁312之接合處為弧形導角，因此雜質及結晶物便會隨 化合水30經由第一導流道32及第二導流道33流出而不會 殘留於容置槽31内。 [0021] 參照第5圖及第6圖，分別為本發明隱形眼鏡第二實施例 之一分解圖及一組合圖。由於容置槽31、第一導流道32 與第二導流道33之結構與功能均與第一實施例相同，在 此不予贅述。第二實施例與第一實施例之差異在於由於 第二實施例之載盤3係用於承載經水化完成之隱形眼鏡之 成品，因此第—突起部35及第二突起部36並未開設排氣 孔34 °且第二實施例中，載盤3更包含一蓋體38，其係以 一真空成形之製程所製造。 [0022] 097120315 羞體38具有四間隔設置於周緣處之第二卡合部381及複數 間隔設置於頂面之凸體382。凸體382略呈圓柱體狀，其 直徑略大於第一卡合部37之直徑。第二卡合部381與第 表單編號A0101 第7頁/共15頁 1003288692-0 1352837 — — — r I _ 100年08月09日後正#&頁 卡合部37相對應。藉由套設凸體382於第一卡合部37上， 及卡合第一卡合部381於相對應之第—合部37上，使蓋 體38蓋設於載盤3上。隱形眼鏡之成品於蓋體μ蓋設後， 將不會旋轉或翻動，便可進行後續包裝出貨之流程。 [0023] 歸納上述，本發明隱形眼鏡用載盤之功效在於載盤之結 構較習知技藝之載盤簡易，因此本發明之載盤3可為真空 成形之方式所製造，成本較習知技藝之水化載盤為低， 不但可重複使用，亦可為提升水化品質，得於一次使用 後便予已拋棄而不予重複使用。 [0024] 本發明隱形眼鏡用載盤之另一功效在於藉由具有弧形導 角之容置槽31，避免如習知技藝之載盤，其容置槽之邊 角將造成雜質或結晶物容易附著於載盤3内’而不能隨化 合水30流出，因此將得以減少清洗製程以確保水化品質 [0025] 本發明隱形眼鏡用載盤之再一功效在於載盤3可配合一蓋 設於載盤上方之蓋體38，即可將隱形眼鏡之成品包裝出 貨，而不需另外設計製造承載隱形眼鏡之成品之載盤。 [0026] 惟以上所述者，僅為本發明之較佳實施例而已，當不能 以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明書内容所作之簡單的等效變化與修飾， 皆應仍屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 [0027] 第1圖係說明習知技藝隱形眼鏡用水化載盤之組合圖； 第2圖係說明習知技藝隱形眼鏡用水化載盤之示意圖， 097120315 表單編珑A0101 第8頁/共15頁 1003288692-0 1352837 100年,08月09日修正替换頁 第3圖係說明本發明之隱形眼鏡用載盤之第丨—實施例之立 體圖； ...： 第4圖係說明本發明之隱形眼鏡用載盤之第一實施例之組 合圖； 第5圖係說明本發明之隱形眼鏡用載盤之第二實施例之分 解圖；以及 第6圖係說明本發明之隱形眼鏡用載盤之第二實施例之組 合圖。 [0028] 097120315 【主要元件符號說明】 I、 3 :載盤； II、 112、311 :底壁； III、 31 :容置槽； 113 :孔洞； 114、312 :圍繞壁； 115 :限位部； 116 :孔隙； 12 :延伸壁； 121 :導流孔； 13 .把手； 14、4 :隱形眼鏡； 3 0 :化合水； 31 :容置槽； 3 2 :第一導流道， 321 :導引部 3 3 ··第二導流道， 34 ‘·排氣孔； 表單編敢wnoi 第9頁/兵15頁 100328 驗-0 1352837 35 ： 第一 突起部； 351 :凹陷部； 36 ： 第二 突起部； 37 ： 第一 卡合部； 38 : 蓋體 y 381 :第: 二卡合部 382 :凸體；以及 39 ： 水化設備。 100年08月09日修孟替换頁 097120315 表單編號A0101 第10頁/共15頁 1003288692-0Correction and replacement page 1352837 of August 09, 100 I *r VI. Description of the Invention: [Technical Field] [0001] The present invention relates to a carrier for contact lenses, and more particularly to an invisible vacuum forming process. The carrier plate for glasses. [Prior Art] [0002] Referring to Figures 1 and 2, respectively, a combination diagram and a schematic view of a hydration tray of a conventional art contact lens. The hydration tray 1 is used for accommodating a plurality of contact lenses, and comprises a bottom wall 11, an extending wall 12 extending upward from the periphery of the bottom wall 11, and two handles 13 disposed on the extending wall 12, and the extending wall 12 is spaced apart A plurality of guide holes 121 are provided. The bottom wall 11 is provided with a plurality of accommodating grooves 111 having a substantially circular shape, and each of the accommodating grooves 111 is adjacent to each other, and defines an aperture 116 with the adjacent receiving groove 111, respectively. The receiving groove 111 has a bottom wall 112 and a surrounding wall 114 extending upward from the periphery of the bottom wall 112. The bottom wall 11 2 is curved upwardly from the outer peripheral edge toward the center to fit the shape of the contact lens 14, and has a plurality of spaced-apart intervals and is radially arranged in a strip-shaped hole 113. A limiting portion 115 having a plurality of intervals around the wall 114 is disposed on the top surface of the surrounding wall 114. [0003] In the hydration, the carrier 1 is immersed in a hydration device (not shown) containing the combined water, and the combined water enters the carrier 1 through the diversion hole 121, the apertures 116 and the holes 113, thereby The contact lens 14 of the carrier 1 is immersed to cause the contact lens 14 to react with water to form a water-containing soft contact lens. However, when the carrier 1 is detached from the hydration device, since the corners of the hole 113 and the limiting portion 115 are not circular arcs, impurities or crystals in the combined water are likely to adhere to the corners of the hole 113 and the limiting portion 115 and remain. In the carrier 1, the contaminated water is contaminated, resulting in unstable hydration quality. When the carrier 1 is reused, it needs 097120315 Form No. A0101 Page 3 / Total 15 Page 1003288692-0 1352837 On August 09, 100, the shuttle is replacing the page for a complicated cleaning process, which is not only time-consuming, but also impurities or crystals. It is still possible that the carrier 1 remains attached to the accommodating groove 111 because it is not cleaned. Further, since the hydration carrier 1 is complicated in structure and needs to be manufactured by injection molding, it is expensive, resulting in a southerly production cost. When the hydrated finished contact lens product is to be packaged and shipped, the carrier and the package body need to be redesigned, and the production cost will be increased. SUMMARY OF THE INVENTION [0004] Accordingly, it is an object of the present invention to provide a contact lens carrier that can be vacuum formed to reduce production costs and to prevent impurities and crystals from adhering to the carrier when the carrier is reused. Internally reduce the quality of hydration. Another object of the present invention is to provide a plurality of spaced-apart vent holes in the carrier so that the gas located in the vent holes can be discharged, so that the contact lenses can be sufficiently immersed in hydration. A further object of the present invention is to reduce the production cost by using a vacuum forming process to manufacture a carrier. In accordance with the above objects, the present invention provides a carrier for a contact lens comprising a plurality of receiving grooves, a plurality of first guiding channels, and a plurality of second guiding channels. The receiving slots are spaced apart from the carrier, and each receiving slot is for carrying a contact lens. The first guide channel is disposed on a side edge of the carrier. The second guiding channel is disposed between the receiving slots of the carrier to connect the receiving slots. When the carrier is immersed in a liquid, it flows into the accommodating groove through the first flow guiding channel and the second guiding flow path, and soaks the contact lens. [0008] The carrier disk for a contact lens of the present invention further includes a plurality of vent holes, which are disposed around the accommodating grooves on the carrier. 097120315 Form No. A0101 Page 4 / Total 15 Page 1003288692-0 1352837 ♦ * [0009] [0011] [0012] [0013] Correction replacement page of August 09, 100, wherein the contact lens of the present invention is loaded The disc system is made by vacuum forming. [Embodiment] The foregoing and other technical contents, features, and advantages of the present invention will be apparent from the following description of the embodiments of the invention. Referring to Figures 3 and 4, there is shown a perspective view and a combination view of a first embodiment of a carrier lens for a contact lens of the present invention. The carrier 3 includes a plurality of accommodating grooves 31, a plurality of first guiding channels 32, a plurality of second guiding channels 33, a plurality of first protrusions 35, a plurality of recessed portions 351, a plurality of second protrusions 36, and a plurality of first engaging portions Part 37. In this embodiment, the carrier 3, the accommodating groove 31, the first guiding channel 32, the second guiding channel 33, the first protrusion 35, the recess 351, the second protrusion 36, and the first engaging portion The 37 series is integrally formed by a vacuum forming process, and the carrier 3 is made of a plastic material. In this embodiment, the plastic material may be rubber (PET), polypropylene (PP), polystyrene (PS) or polyethylene (PVC). The accommodating groove 31 has a circular cylindrical hollow cylinder, and has a bottom wall 311 and a surrounding wall 312 extending upward from the periphery of the bottom wall 311, and spaced apart from the top surface of the carrier 3 to form an array. arrangement. The bottom wall 311 is a circular curved surface that fits the contact lens 4. Each of the accommodating grooves 31 carries a contact lens 4. In order to avoid the repeated use of the carrier 3 during the hydration process, impurities or crystals adhere to the accommodating groove 31, and the joint between the bottom wall 311 and the surrounding wall 312 is an arc-shaped guide angle, so that impurities or crystals are formed. It is possible to smoothly flow out of the accommodating groove 31 with a liquid. The first flow guiding channel 32 is a columnar groove, and is spaced apart from the side edge of the carrier plate 097120315. Form No. A0101 Page 5 / Total 15 pages 1003288692-0 1352837 _ August 10, 1100 revised replacement page, with The liquid is introduced into the carrier tray 3. In this embodiment, the liquid system is carried out by combining water 30. The second flow guiding channel 33 is disposed between the accommodating grooves 31 of the carrier 3, so that the accommodating grooves 31 can communicate with each other by the second guiding channel 33. [0015] The first protrusions 35 are slightly cylindrical in shape and are spaced apart from each other on the top surface of the carrier 3 to form an array. [0016] The recessed portion 351 is slightly hollow in a hollow shape, and is disposed on the top surface of the carrier 3 and formed in an array. The recessed portion 351 is interlaced with the first protruding portion 35 and is opened on the bottom surface. A venting hole (not shown). [0017] The second protrusions 36 are slightly in the shape of an inner hollow cuboid, are spaced apart from the side edges of the carrier 3, and define a flow guiding portion 321 between each of the two second protrusions 36, and the first The guide channels 32 are spaced apart from each other. The flow guiding portion 321 is for guiding the combined water 30 to enter the accommodating groove 31 via the first guiding channel 32. In order to smoothly remove the air in the accommodating groove 31, after the vacuum forming of the carrier plate 3, the top surface of each of the first protrusions 35 and the second protrusions 36 is selectively provided with a vent hole through the post-processing opening treatment. 34. [0018] When the contact lens 4 is hydrated, the plurality of carriers 3 are alternately overlapped with each other, so that the upper tray 3 is first rotated 180 degrees horizontally, and then stacked to the lower tray 3 » by means of this In the overlapping arrangement, the bottom surface of the recessed portion 351 of the upper carrier 3 will abut against the top surface of the first protrusion 35 of the lower carrier 35, so that the lower carrier 3 can support the upper carrier 3, and the recess 351 The vent hole corresponds to the vent hole 34 of the first protrusion 35. When the upper download trays 3 are alternately stacked, the second guide runners 33 of the upper tray 3 are brought into contact between the side edges of the lower tray 3 and the second projections 36. 097120315 Form No. A0101 Page 6 of 15 1003288692-0 1352837 • [0019] Correction replacement page j on August 09, 1100 When the carrier 3 is placed in the dehydration device 39, the compound water 30 is sequentially borrowed The first guide channel 32, the flow guiding portion 321 and the second guiding channel 33 flow into the accommodating groove 31, and the contact lens 4 located in the accommodating groove 31 is immersed. After the compound water 30 enters the accommodating tank 31, the gas in the accommodating tank 31 of the lower tray 3 is pressed by the hydration water 3, and sequentially passes through the vent hole of the first protrusion 35 of the lower tray 3. 34. The venting hole of the recessed portion 351 of the upper loading tray 3 is discharged outside the upper loading tray 3, so that the gas of the accommodating groove 31 is completely discharged, so that the contact lens 4 can be completely immersed in the combined water 30 to fully soak the water. Chemical. [0020] When the hydration is completed, one side of the carrier 3 is inclined to the horizontal plane, and the combined water 30 accommodated in the accommodating groove 31 will be sequentially guided by the second guiding channel 33' and the flow guiding portion 321 and The first flow guide 32 is guided away from the carrier 3 . Since the joint between the bottom wall 311 and the surrounding wall 312 is a curved guide angle, impurities and crystals will flow out along with the combined water 30 through the first guide channel 32 and the second guide channel 33 without remaining in the receiving position. Inside the slot 31. [0021] Referring to Figures 5 and 6, respectively, an exploded view and a combined view of a second embodiment of the contact lens of the present invention. The structure and function of the accommodating groove 31, the first air guiding channel 32 and the second air guiding channel 33 are the same as those of the first embodiment, and will not be described herein. The difference between the second embodiment and the first embodiment is that since the carrier 3 of the second embodiment is used to carry the finished product of the hydrated contact lens, the first protrusion 35 and the second protrusion 36 are not opened. The vent hole 34° and in the second embodiment, the carrier 3 further includes a cover 38 which is manufactured by a vacuum forming process. [0022] 097120315 The shame body 38 has a second engaging portion 381 that is spaced apart from the periphery and a plurality of protrusions 382 that are spaced apart from the top surface. The projection 382 is slightly cylindrical and has a diameter slightly larger than the diameter of the first engaging portion 37. The second engaging portion 381 corresponds to the first form number A0101, page 7 of 15 1003288692-0 1352837 — — r I _ 100 years old, August 9th, and the corresponding page, the engaging portion 37. The cover 38 is placed on the carrier 3 by arranging the projection 382 on the first engaging portion 37 and engaging the first engaging portion 381 on the corresponding first portion 37. After the cover of the contact lens is covered, it will not rotate or flip, and the subsequent packaging and shipping process can be carried out. [0023] In summary, the effect of the carrier for the contact lens of the present invention is that the structure of the carrier is simpler than that of the prior art, so that the carrier 3 of the present invention can be manufactured by vacuum forming, and the cost is better than the conventional art. The hydration tray is low, not only can be reused, but also can improve the hydration quality, and it can be discarded after one use without being reused. [0024] Another function of the carrier lens for contact lens of the present invention is to avoid the carrier disk as in the prior art by the accommodating groove 31 having the curved lead angle, and the corner of the accommodating groove will cause impurities or crystals. It is easy to adhere to the inside of the carrier 3 and cannot flow out with the combined water 30, so that the cleaning process can be reduced to ensure the hydration quality. [0025] Another function of the carrier for the contact lens of the present invention is that the carrier 3 can be fitted with a cover. The cover 38 above the carrier can be packaged for the finished product of the contact lens without the need to separately design and manufacture a carrier carrying the finished product of the contact lens. The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes made according to the scope of the invention and the contents of the description of the invention. And modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS [0027] FIG. 1 is a combination diagram of a conventional technical contact lens hydration carrier; FIG. 2 is a schematic view showing a conventional technical contact lens hydration carrier, 097120315 Form Compilation A0101 8 pages/total 15 pages 1003288692-0 1352837 100 years, August 09, revised replacement page, Fig. 3 is a perspective view showing the third embodiment of the carrier lens for a contact lens of the present invention; ...: Fig. 4 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 5 is an exploded view showing a second embodiment of a carrier for a contact lens of the present invention; and FIG. 6 is an invisible view of the second embodiment of the present invention; A combination view of a second embodiment of a carrier disk for glasses. [0028] 097120315 [Description of main component symbols] I, 3: carrier disk; II, 112, 311: bottom wall; III, 31: accommodating groove; 113: hole; 114, 312: surrounding wall; 115: limiting part 116: pore; 12: extension wall; 121: diversion hole; 13. handle; 14, 4: contact lens; 3 0: compound water; 31: accommodating groove; 3 2: first guide channel, 321 : Guide part 3 3 ··Second flow guide, 34 '·Exhaust hole; Form braided wnoi Page 9/Bing 15 page 100328 Test-0 1352837 35 : First protrusion; 351: Depression; 36 : Second protrusion portion; 37: first engagement portion; 38: cover body y 381: first: two engagement portions 382: convex body; and 39: hydration device. October 09, 2010 Xiu Meng replacement page 097120315 Form No. A0101 Page 10 of 15 1003288692-0