44226 6 A7 經濟部中央標準局員工消費合作社印製 B7五、發明説明（） 枝術範圍 本發明有關一種書桌，尤其有關一種手提式可收摺之 膝上型書桌。 背景技術 手提式桌子、學校課桌與各種桌板，諸如製圖板，特 別爲製圖人員、工程人員、學生等所熟知與廣泛使用。這 些書桌和製圖板的組裝方式，大都是使它們在組裝後包括 一傾斜的工作面，以便於使用。這些書桌或製圖板中，有 些包括某種可附接在桌板的桌腿型式，以使桌板或書桌成 某一斜度放置。配合此類性質桌板使用的桌腿，經常相當 重而體積大，在運搬或儲放桌板或書桌時，不易收藏。 另有些書桌或桌板提供傾斜的工作面，這些傾斜的工 作面於使用時，可承放在另一書桌或其他類似的工作表 面，因此，這些桌板經常須適當地支承於工作表面上時， 才可能有生產性的用途。 這類已知的手提式桌子、書桌與桌板，還有另一相關 的缺點，亦即，它們相當大，而且時常經過精密設計因此 相當昂貴，使得它們不是隨時都易於取得，尤其對淸寒社 區內的人們而言。 發明目的 因此，本發明目的之一是提供一種手提式書桌，其可 克服或至少最小化前述的某些缺點，或至少在現有的手提 式書桌外，提供另一選擇。 發明內容 4 本紙張尺度適用中國國家標準（CNS ) Α4規格（21〇><297公釐） (請先閱讀背面之注意事項再填寫本頁) 、v9 -ϋ . 經濟部智慧財產局員工消費合作社印製 44226 6 A7 A7 __ B7 五、發明説明（） 根據本發明，其中提供一種手提式書桌，此種手提式 書桌包括至少二個平面構件與至少一個支撐構件。該二平 面構件可在一操作位置上彼此接合以形成一平坦工作表 面’或在一收摺位置上相接合以彼此鄰接貼靠；該支撐構 件以可鬆開的方式與至少一個平面構件接合，並於使用時 可將該些平面構件支撐於操作位置，相對水平成一傾斜 度。 支撐構件的尺寸可設計爲可將平面構件支撐在一使用 者的膝上。當平面構件在其收摺位置時，支撐構件亦可作 爲提攜裝置。 每一平面構件可有一外表面與一內表面。平面構件可 有大致相等的尺寸，並可利用鉸鏈或類似之連接裝置，彼 此活動連接。連接裝置較佳是接設在平面構件之內表面。 平面構件在操作位置時，可倂排放置，使相同表面朝向相 同方向，以產生平坦的工作表面。平面構件在收摺位置時， 可彼此鄰接貼靠，讓其內表面彼此相向以利書桌之運搬。 本書桌可包括二個支撐構件。這些支撐構件係以可鬆 開的方式接合二個平面構件，以於平面構件在操作位置 時，將它們倂排支撐在使用者的膝上。平面構件可在其內 表面包括第一定位構造，以可鬆開的方式定位支撐構件。 每一支撐構件可包括至少一個用以配合使用者膝部的周緣 輪廓，以於使用時將平面構件支撐於一斜度上。 二個支擦構件亦可密合作爲提攜手把，於平面構件在 收摺位置時，用於運搬書桌。尤其是，平面構件可包括第 ___ 5 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 訂 線， (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 442266 A7 B7五、發明説明（） 二定位構造，安排在平面構件的兩相反側的周緣’以於運 搬書桌時，以可鬆開的方式定位支撐構件。 根據本發明之一形式，二個支撐構件可包括接合裝 置，以於支撐構件作爲支撐時，將它們以端對端的關係和 可鬆開的方式彼此接合。在本發明另一形式中，支撐構件 可彼此鉸接，並可藉鉸鏈在二位置間活動。支撐構件在其 中一位置時爲端對端關係，在另一位置時爲倂排關係。 支撐構件亦可包括鎖止裝置，以於支撐構件作爲提攜 手把時，以可分離的方式，將它們鎖定在併排關係。 本書桌進而可包括第一扣持裝置，用以扣持文具等， 例如筆記本、尺、筆或鉛筆。第一扣持裝置可用可卸除的 方式，接設在平面構件的內表面，以於平面構件在收摺位 置時，第一扣持裝置與其聯結的文具都被覆罩在平面構件 之間。 本書桌也可包括第二扣持裝置，以於書桌在使用中 時，將文具等扣持在平面構件的傾斜外表面上。第二扣持 裝置可爲多數止擋之形式，設於平面構件外表面的周緣 上。 本書桌亦可包括第三扣持裝置，其以可鬆開的方式安 排而與一平面構件之周緣接合，以於書桌在使用狀態時， 將紙張等扣持在傾斜之平面構件的外表面上。尤其是，該 第三扣持裝置可爲多數具特定輪廓之扣持托架的形式。 根據本發明另一方面，其中提供一種手提式書桌，此 種手提式書桌包括：至少一個平面構件與至少一個支撐構 _________6__ 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ----------------ΐτ------^ , (請先閲讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 ί Α42 2 6 6 Α7 ___Β7_____五、發明説明（） 件。該支撐構件係以可鬆開的方式接合於平面構件，並可 於書桌在使用狀態時，相對使用省膝部成一角度支撐該平 面構件。該支撐構件具有至少一個具特定輪廓之周緣*用 以配合使用者的膝部。 圖式簡要說明 以下參照附圖說明本發明，但其目的不在限制本發明 之範圍。附圖包括： 圖1爲根據本發明一實施例之手提式書桌之立體圖， 其中二平面構件在收摺位置； 圖2爲圖1所示書桌之局部剖示立體圖，顯示將其 支撐構件定位作爲提攜手把之方式： 圖3爲圖1所示書桌於二平面構件在操作位置時的 俯視立體圖； 圖4爲圖1所示書桌於二平面構件在操作位置時的 仰視立體圖； 圖5爲圖4所示書桌之立體剖視圖，顯示支撐構件 被定位在平面構件內表面的方式； 圖6爲根據本發明另一實施例之手提式書桌之立體 回 . 圖， 圖7爲圖6所示書桌之立體圖，顯示支撐構件被定 位作爲提攜手把之方式； 圖8爲圖6所示書桌於二平面構件在操作位置時的 俯視立體圖，並顯示扣持托架之位置； 圖9爲圖6所示書桌於二平面構件在操作位置時的 _^______7_ _ 本紙張尺度適用中國國家標準（CNS：IA4規格（210X297公釐) (請先閲讀背面之注意事項再填寫本頁) 線 44226 6 A7 經濟部智慧財產局員工消費合作杜印製 B7五、發明説明（） 仰視立體圖，其中支撐構件在支撐位置上；以及 圖10爲圖9所示書桌除去支撐構件後之仰視圖，顯 示第一定位構造。 發明特定實施例 首先參照圖1至圖5。根據本發明此一實施例之手提 式書桌，以參考標號1C槪括表示之。書桌10包括二個 平面構件12與二個支撐構件14。每一平面構件包括一 外表面16與一內表面18。二個平面構件12係利用接設 於平面構件12內表面18之鉸鏈20，彼此活動連接。 平面構件12可在圖3及圖4所示的操作位置與圖1 所示的收摺位置間活動。平面構件12在操作位置時，係 倂排設置，其上之相同表面方位相同。平面構件12在收 摺位置時，係彼此鄰接貼靠，其內表面1 8彼此相向。 書桌1 〇包括二個支撐構件1 4，用以將位於操作位 置的平面構件12支撐在使用者的膝上（圖中未示）。每一 支撐構件14包括一外周緣輪廓14.1，用以配合使用者 的膝部，將平面構件12以一角度支撐在使用者膝上。 每一平面構件12包括第一定位構造22，例如溝槽 構造，接設在平面構件12之內表面18,以可鬆開的方 式，將支撐構件14定位於其內。支撐構件14則包括尺 寸與定位構造22互補之舌榫構造30，以與平面構件12 上的溝槽構造22滑動接合。舌榫構造30係位於支撐構 件1 4上與外周緣輪廓1 4 . 1相反之位置。 支撐構件14進而包括接合裝置，係位於支撐構件I4 _^_____8_ 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先聞讀背面之注意事項再填寫本頁) -訂 經濟部智慧財產局員工消費合作社印製 442266 A7 ______B7_五、發明説明（） 上且尺寸互補之舌榫構造14.2與溝槽構造14_3,以使 支撐構件14彼此接合後再與平面構件12接合。 當平面構件12在收摺位置時，支撐構件14可密合 作爲提攜手把，以便於運搬書桌10。爲達此一目的，平 面構件12包括第二定位構造24，例如溝槽構造，安排 在平面構件12之兩相反側上，以於運搬書桌10時，讓 支撐構件14之舌榫構造30以可鬆開的方式定位於該處= 書桌10進而包括第一扣持裝置26·1、26.2及 2 6 · 3，用以扣持文具等，例如筆記本之扣持（2 6 · 1 )、尺 之扣持（26. 2)及一組筆或鉛筆之扣持（26.3)。這些扣持 裝置係接設在平面構件12之內表面18,以於平面構件12 在收摺位置時，第一扣持裝置26.1至26.3及扣合的文 具（圖中未示）都被覆罩在平面構件12之間。 書桌10亦包括第二扣持裝置，爲細長止擋構造28 之形式，大致位於平面構件12外表面16之周緣。當平 面構件12在操作位置時，第二扣持裝置可將文具等（圖 中未示）扣持在書桌10成一傾斜角度的平坦工作表面上。 書桌10亦包括橡膠等材料製成之圍封構件32,以 阻斷平面構件1 2在收摺位置時定義的開口。 現在請參閱圖6至圖1 0。在本發明此一實施例中， 以參考標號40指示手提式書桌。如第一實施例中，書桌 4〇亦包括二個平面構件42與二個有特定輪廓的支撐構 件44。每—平面構件42有一外表面46與一內表面48。 二個平面構件42係利用鉸鏈5C相互鉸接。平面構件42 _______9___ ^紙崁尺度適用中國國家標準（CNS ) Α4規格（210X297公釐) ' {請先閱讀背面之注項再填寫本頁) 線 4 42 26 6 經濟部智慧財產局員工消費合作社印製 A7 B7五、發明説明（） 也可在一操作位置（圖8及圖9)與一收摺位置（圖6)間 活動。 以參考標號44指示的二個支撐構件，每個包括一外 周緣輪廓44.1，適於配合使用者的膝部。它們亦包括一 容許使用者的手突伸穿過的開孔44.2，以用於提攜書桌 4〇。開孔44.2由一適於配合使用者手指提攜書桌40的 內周緣輪廓44 . 3所定義。 在本發明此一實施例中，第一定位構造爲多組特定輪 廓之定位托架52與關聯之限位裝置54，接設於平面構 件42之內表面48，以便將支撐構件44以可鬆開的方式 定位在內表面48中。 每一平面構件42包括二組特定輪廓的定位托架52 與關聯的限位裝置5 4。二組定位托架與限位·裝置係在彼 此相對之位置，並分別大致鄰接內表面48的一周緣。支 撐構件44包括定位溝槽構造44.4，可於平面構件42在 操作位置時，讓支撐構件44與平面構件42上的特定輪 廓托架52以快速扣合（snap fit)的方式接合。溝槽構 造44.4係在支撐構件44上，大致位於外周緣輪廓44.1 的兩相反側。 支撐構件4 4係利用鉸鏈56彼此鉸接，並可在平面 構件42於收摺位置時，密合作爲提攜手把。更明確地說， 支撐構件44可藉鉸鏈在兩個位置間轉動。在其中一位置 時，支撐構件4 4的方位成併排關係以作爲提攜手把，在 另一位置時，它們的方位成端對端關係以作爲支撐構件。 ___10_ 本紙張尺度適用中國國家標準（CNS ) A4規格（2i〇X297/>楚y (請先閲讀背面之注意事項再填寫本頁) ,?τ 線 經濟部智慧財產局員工消費合作社印製 4 4 2 2 6 6 a? _B7__五、發明説明（） 在此實施例中，平面構件42包括舌榫構造58形式 之第二定位構造，沿平面構件42兩相反側的周緣延伸。 其安排方式使支撐構件44作爲提攜手把時’以可鬆開的 方式與平面構件42的舌榫構造58接合，以利於運搬書 桌10。 支撐構件44亦可包括鎖止裝置60,可在支撐構件44 作爲提攜手把時，以可分離的方式，將它們鎖止在倂排的 關係。更明確地說，鎖止裝置60包括一連接於一支撐構 件44 —端的鎖止銷60.1，及至少二個套筒構造60.2 與60.3。其安排方式係使套筒構造60.2與60.3各位 於一個支撐構件44上。更明確地說，當支撐構件44的 方位在倂排關係時，套筒構造60.2與60.3可在同軸位 置，使鎖止銷60.1可突伸穿過套筒構造60.2與套筒構 造60.3，藉此將支撐構件44鎖止在倂排關係。 本書桌40亦可包括第一扣持裝置62，用以扣持一 組鉛筆或筆（圖中未示）。扣持裝置62係接設於平面構件 42之一的內表面48,其安排方式使第一扣持裝置62可 被覆罩在成收摺位置的兩平面構件42之間。 書桌40進而包括形式爲細長止擋構造64的第二扣 持裝置，其大致位於平面構件42外表面46的周緣。書 桌4〇亦可選擇性地包括具有特定輪廓的扣持托架66爲 第三扣持裝置，可用可分離的方式連接於平面構件42的 內表面，並可與平面構件42在周緣部位接合，將使用中 的紙張（圖中未示）扣持在平面構件42上。 _-___ 11 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閱讀背面之注意事項再填寫本頁) 訂 -線 ,Λ42266 A7 B7 _____ "— · — . — ----—-- 五、發明说明（） 吾人可以理解，本發明可有許多其他實施例，均不脫 離申請專利範圍所述本發明範圍之精神。 (請先閲積背面之注意事項再填寫本頁) 圖號元件說明 10.. .手提式書桌 I2...平面構件 1 4 ...支撐構件 14.1. ··外周緣輪廓 14. 2·.·舌榫構造 14.3.. .溝槽構造 16__·外表面 18...內表面 2〇..·鉸鏈 22.·.第一定位構造（溝槽構造） 24 ..第二定位構造（溝槽構造） 26.1、 26.2、26. 3…第一扣持裝置 28.··第二扣持裝置（細長止擋構造） 3Q...舌榫構造 4〇...手提式書桌 42...平面構件 44.. .支撐構件 44.1...外周緣輪廓 44·2·..開孔 44·3..·內周緣輪廓 44.4...溝槽構造 46.··外表面 48...內表面 50...鉸鍵 52·..第一定位構造（定位拖架） 54..·限位裝置 56.·.鉸鏈 58...第二定位構造（舌榫構造） 60.. .鎖止裝置 60.1·..鎖止銷 經濟部智慧財產局員工消費合作社印製 60.2、 60.3···套筒構造 62·.·第一扣持裝置 64.··第二扣持裝置（細長止擋構造） 66· .·第三扣持裝置（扣持拖架） 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐）44226 6 A7 Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economics B7 V. Description of the Invention (1) Scope of the Invention The present invention relates to a desk, and more particularly to a portable, retractable laptop desk. Background Art Portable desks, school desks, and various desks, such as drawing boards, are well known and widely used by cartographers, engineers, students, and the like. Most of these desks and drawing boards are assembled in such a way that they include an inclined working surface after assembly for ease of use. Some of these desks or drawing boards include some type of leg that can be attached to the table board so that the table board or desk is placed at a certain slope. The legs used with this type of board are often quite heavy and bulky, making them difficult to store when moving or storing the board or desk. Other desks or tables provide inclined working surfaces. These inclined working surfaces can be placed on another desk or other similar working surface when in use. Therefore, these tables must often be properly supported on the working surface. It is possible to have productive uses. Such known portable tables, desks, and tables have another related disadvantage, that is, they are quite large and often precision-designed and therefore quite expensive, making them not readily available at all times, especially for chills For people in the community. OBJECTS OF THE INVENTION Accordingly, it is an object of the present invention to provide a portable desk that overcomes or at least minimizes some of the aforementioned disadvantages, or at least provides an alternative to existing portable desks. Disclosure of the Invention 4 This paper size applies Chinese National Standard (CNS) A4 specification (21〇 > < 297 mm) (Please read the precautions on the back before filling out this page), v9 -ϋ. Staff of Intellectual Property Bureau, Ministry of Economic Affairs Printed by the consumer cooperative 44226 6 A7 A7 __ B7 V. Description of the invention () According to the present invention, a portable desk is provided, and the portable desk includes at least two planar members and at least one supporting member. The two planar members can be engaged with each other in an operating position to form a flat working surface 'or in a folded position to abut against each other; the support member is releasably engaged with at least one planar member, When in use, the flat members can be supported at the operating position, and the relative level is inclined. The support member may be sized to support a planar member on a user's lap. When the flat member is in its folded position, the support member can also serve as a carrying device. Each planar member may have an outer surface and an inner surface. The planar members may have approximately equal dimensions and may be articulated to each other using hinges or similar attachment devices. The connecting device is preferably connected to the inner surface of the planar member. When the planar members are in the operating position, they can be placed side by side so that the same surface faces the same direction to produce a flat working surface. When the flat members are in the folded position, they can be abutted against each other so that their inner surfaces face each other to facilitate the transportation of the desk. The desk may include two support members. These support members are releasably joined to the two planar members so that the planar members are supported on the user's lap when the planar members are in the operating position. The planar member may include a first positioning structure on an inner surface thereof to position the support member in a releasable manner. Each support member may include at least one peripheral contour to fit a user's knee, so as to support the planar member at an inclination during use. The two supporting members can also be used as lifting handles in close cooperation, and used to move the desk when the flat member is in the folded position. In particular, the plane member may include the ___ 5th paper size applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm). (Please read the precautions on the back before filling this page) Staff of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the consumer cooperative 442266 A7 B7 V. Description of the invention (2) The positioning structure is arranged on the periphery of two opposite sides of the plane member, so that the supporting member can be releasably positioned when the desk is moved. According to a form of the present invention, the two supporting members may include engaging means for engaging them with each other in an end-to-end relationship and in a releasable manner when the supporting members serve as supports. In another form of the invention, the support members can be hinged to each other and can be moved between the two positions by a hinge. The support member has an end-to-end relationship in one of the positions and a row relationship in the other. The support member may also include a locking device to lock them in a side-by-side relationship in a detachable manner when the support member is used as a carrying handle. The desk may further include a first holding device for holding stationery and the like, such as a notebook, ruler, pen or pencil. The first holding device can be detachably attached to the inner surface of the flat member, so that when the flat member is in the folded position, the first holding device and the stationery connected to it are covered between the flat members. The desk may also include a second retaining device for retaining stationery and the like on the inclined outer surface of the planar member when the desk is in use. The second holding device may be in the form of a plurality of stops, and is provided on the periphery of the outer surface of the planar member. The desk may also include a third retaining device arranged in a releasable manner to engage the periphery of a planar member, so that when the desk is in use, paper or the like is retained on the outer surface of the inclined planar member . In particular, the third retaining device may be in the form of a plurality of retaining brackets having a specific profile. According to another aspect of the present invention, a portable desk is provided. The portable desk includes: at least one flat member and at least one supporting structure _________6__ This paper size is applicable to China National Standard (CNS) A4 (210X297 mm)- --------------- ΐτ ------ ^, (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs Α42 2 6 6 Α7 ___ Β7 _____ 5. Description of the invention (). The support member is releasably connected to the planar member, and can support the planar member at an angle relative to the knee-saving part when the desk is in use. The support member has at least one contoured periphery * to fit a user's knee. Brief Description of the Drawings The present invention is described below with reference to the drawings, but its purpose is not to limit the scope of the present invention. The drawings include: FIG. 1 is a perspective view of a portable desk according to an embodiment of the present invention, in which two plane members are in a folded position; FIG. 2 is a partial sectional perspective view of the desk shown in FIG. The way of holding hands: Fig. 3 is a top perspective view of the desk shown in Fig. 1 when the two plane members are in the operating position; Fig. 4 is a bottom perspective view of the desk shown in Fig. 1 when the two plane members are in the operating position; 4 is a perspective sectional view of the desk shown in FIG. 4, showing the manner in which the supporting member is positioned on the inner surface of the planar member; FIG. 6 is a three-dimensional back view of a portable desk according to another embodiment of the present invention. A perspective view showing that the support member is positioned as a way of lifting the handle; FIG. 8 is a top perspective view of the desk shown in FIG. 6 when the two plane members are in the operating position, and shows the position of the holding bracket; FIG. 9 is shown in FIG. 6 _ ^ ______ 7_ _ When the desk is in the operation position of the second plane member This paper size applies to Chinese national standards (CNS: IA4 specification (210X297 mm) (Please read the precautions on the back before filling this page) Line 44226 6 A7 Consumer Cooperation of Intellectual Property Bureau of the Ministry of Economic Affairs Du printed B7 V. Description of the invention () Bottom perspective view, with the supporting member in the supporting position; and FIG. 10 is a bottom view of the desk shown in FIG. 9 after the supporting member is removed, A first positioning structure is shown. A specific embodiment of the invention first refers to FIGS. 1 to 5. A portable desk according to this embodiment of the present invention is indicated by the reference numeral 1C. The desk 10 includes two planar members 12 and two Support member 14. Each plane member includes an outer surface 16 and an inner surface 18. The two plane members 12 are movably connected to each other by a hinge 20 connected to the inner surface 18 of the plane member 12. The plane members 12 can be seen in FIG. And the operating position shown in Fig. 4 and the folded position shown in Fig. 1 are movable. When the planar member 12 is in the operating position, it is arranged in a row, and the same surface orientation thereon is the same. It is adjacent to each other, and its inner surfaces 18 face each other. The desk 10 includes two supporting members 14 for supporting the planar member 12 in the operating position on the user's lap (in the figure) (Shown). Each support member 14 includes an outer peripheral contour 14.1 for supporting the user's knee to support the planar member 12 on the user's knee at an angle. Each planar member 12 includes a first positioning structure 22, For example, a groove structure is provided on the inner surface 18 of the planar member 12 to releasably position the support member 14 therein. The support member 14 includes a tongue and groove structure 30 having a size complementary to the positioning structure 22 to It is in sliding engagement with the groove structure 22 on the planar member 12. The tongue-and-groove structure 30 is located on the support member 14 at a position opposite to the outer peripheral contour 14. 1. The support member 14 further includes a joint device and is located on the support member I4 _ ^ _____ 8_ This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) (please read the notes on the back before filling out this page)-Order printed by the Intellectual Property Bureau Employee Consumer Cooperative of the Ministry of Economic Affairs 442266 A7 ______B7_F 2. Description of the invention: The tongue-and-groove structure 14.2 and the groove structure 14_3 on complementary dimensions are used to make the supporting members 14 join to each other and then to the planar member 12. When the flat member 12 is in the folded position, the support member 14 can be closely attached as a handle to facilitate the transportation of the desk 10. To achieve this, the planar member 12 includes a second positioning structure 24, such as a groove structure, arranged on two opposite sides of the planar member 12, so that when the desk 10 is moved, the tongue-and-groove structure 30 of the support member 14 can be The way of releasing is located here = desk 10 and further includes a first holding device 26 · 1, 26.2, and 2 6 · 3 for holding stationery and the like, such as a notebook holding (2 6 · 1), a ruler Deduction (26. 2) and deduction of a group of pens or pencils (26.3). These retaining devices are connected to the inner surface 18 of the planar member 12, so that when the planar member 12 is in the folded position, the first retaining devices 26.1 to 26.3 and the fastened stationery (not shown) are covered in Between the plane members 12. The desk 10 also includes a second retaining device, which is in the form of an elongated stop structure 28, and is located substantially on the periphery of the outer surface 16 of the planar member 12. When the flat member 12 is in the operating position, the second holding device can hold stationery and the like (not shown) on a flat work surface of the desk 10 at an inclined angle. The desk 10 also includes an enclosure member 32 made of a material such as rubber to block the opening defined by the planar member 12 in the folded position. Please refer to FIGS. 6 to 10 now. In this embodiment of the present invention, the portable desk is designated by reference numeral 40. As in the first embodiment, the desk 40 also includes two planar members 42 and two supporting members 44 having a specific contour. Each planar member 42 has an outer surface 46 and an inner surface 48. The two planar members 42 are hinged to each other by a hinge 5C. Flat member 42 _______9___ ^ Paper size is applicable to Chinese National Standard (CNS) Α4 specification (210X297mm) '{Please read the note on the back before filling out this page) Line 4 42 26 6 Printed by the Consumers ’Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs System A7 B7 V. Description of the invention () It can also be moved between an operating position (Figure 8 and Figure 9) and a folding position (Figure 6). Two support members, designated by reference numeral 44, each including an outer peripheral contour 44.1, are adapted to fit a user's knee. They also include an opening 44.2. Allowing the user's hand to protrude through for carrying the desk 40. The opening 44.2 is defined by an inner peripheral contour 44.3. Suitable for carrying the desk 40 with a finger of a user. In this embodiment of the present invention, the first positioning structure is a plurality of sets of positioning brackets 52 with specific contours and associated limiting devices 54 connected to the inner surface 48 of the planar member 42 so that the supporting member 44 can be loosened. The open manner is positioned in the inner surface 48. Each plane member 42 includes two sets of positioning brackets 52 with specific contours and associated limiting devices 54. The two sets of positioning brackets and the position-limiting devices are located opposite to each other, and each substantially adjoins a peripheral edge of the inner surface 48. The supporting member 44 includes a positioning groove structure 44.4. When the planar member 42 is in the operating position, the supporting member 44 and a specific contour bracket 52 on the planar member 42 can be engaged in a snap fit manner. The groove structure 44.4 is attached to the support member 44 and is located substantially on two opposite sides of the outer peripheral contour 44.1. The support members 4 and 4 are hinged to each other by a hinge 56 and can be closely cooperated with each other when the planar member 42 is in the folded position. More specifically, the support member 44 can be pivoted between two positions by a hinge. In one of the positions, the orientations of the support members 44 are in a side-by-side relationship as a handle, and in the other position, their orientations are in an end-to-end relationship as a support member. ___10_ This paper size applies the Chinese National Standard (CNS) A4 specification (2iOX297 / > Chuy (Please read the precautions on the back before filling this page), printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 4 4 2 2 6 6 a? _B7__ V. Description of the invention () In this embodiment, the planar member 42 includes a second positioning structure in the form of a tongue-and-groove structure 58 that extends along the periphery of two opposite sides of the planar member 42. Arrangement When the supporting member 44 is used as a lifting handle, it can be releasably engaged with the tongue-and-groove structure 58 of the planar member 42 to facilitate the transportation of the desk 10. The supporting member 44 may also include a locking device 60. When the handles are lifted, they are detachably locked in a row relationship. More specifically, the locking device 60 includes a locking pin 60.1 connected to the end of a supporting member 44 and at least two sleeves Tube structures 60.2 and 60.3. The arrangement is such that the sleeve structures 60.2 and 60.3 are located on a support member 44. More specifically, when the orientation of the support members 44 is in a row relationship, the sleeve structures 60.2 and 60.3 can be Coaxial position, The locking pin 60.1 can protrude through the sleeve structure 60.2 and the sleeve structure 60.3, thereby locking the support member 44 in a row relationship. The desk 40 may also include a first retaining device 62 for retaining a Set of pencils or pens (not shown). The holding device 62 is connected to the inner surface 48 of one of the planar members 42 and is arranged in such a manner that the first holding device 62 can be covered on two planes in a folded position. Between the members 42. The desk 40 further includes a second fastening device in the form of an elongated stop structure 64, which is located approximately on the periphery of the outer surface 46 of the planar member 42. The desk 40 may optionally include a buckle having a specific contour. The bracket 66 is a third fastening device, which can be detachably connected to the inner surface of the planar member 42 and can be engaged with the planar member 42 at the peripheral portion, and clamps the paper in use (not shown) on the plane. Component 42. _-___ 11 This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page) Order-line, Λ42266 A7 B7 _____ " —- —. — ----—-- 5. Description of the invention () I can understand that there are many other embodiments of the present invention, all of which do not depart from the spirit of the scope of the present invention described in the scope of patent application. (Please read the notes on the back of the product before filling out this page.) Desk I2 ... planar member 1 4 ... support member 14.1 .. · outer peripheral contour 14.2 .. · tongue structure 14.3 ... groove structure 16__ · outer surface 18 ... inner surface 2〇 .. · Hinge 22 ... First positioning structure (groove structure) 24 .. Second positioning structure (groove structure) 26.1, 26.2, 26. 3 ... First holding device 28 .. · Second holding Device (slender stop structure) 3Q ... tongue and tongue structure 4〇 ... portable desk 42 ... plane member 44 ... support member 44.1 ... outer peripheral contour 44 · 2 · .. opening 44 · 3 ··· Inner perimeter profile 44.4 ... Groove structure 46 .. · Outer surface 48 ... Inner surface 50 ... Hinge 52 ·. · First positioning structure (positioning carriage) 54 .. · Limiting device 56 .. Hinge 58 ... Second positioning structure (tongue and tongue structure) 60 .. Locking device 60.1 ... Locking pin Printed by employees' cooperatives of the Intellectual Property Bureau of the Ministry of Economy 60.2, 60.3 ... · Sleeve structure 62 ... One holding device 64. ·· Second holding device (slim stop structure) 66 ··· Third holding device (holding carriage) This paper size applies to China National Standard (CNS) Α4 specification (210X297 mm) )