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A protection casing of an electronic device with a function of supporting includes a lower casing having an approximately rectangular shape; a periphery of the lower casing being formed with a frame for enclosing a tablet computer; a supporting sheet including at least one kind of foldable traces; t

A protection casing of an electronic device with a function of supporting includes a lower casing having an approximately rectangular shape; a periphery of the lower casing being formed with a frame for enclosing a tablet computer; a supporting sheet including at least one kind of foldable traces; the supporting sheet being foldable along the foldable traces so as to present a three dimensional structure; a combining band (201) formed at an upper side of the supporting sheet adhering the supporting sheet to the lower casing; and wherein after assembly the supporting sheet to the lower casing, the supporting sheet can be folded along the foldable traces to form as a seat for standing the lower casing; and an electronic device can be placed on the lower casing for supporting the casing thereon.

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1. A protection casing of an electronic device with a function of supporting, comprising: a lower casing (10) having an approximately rectangular shape; a periphery of the lower casing being formed with a frame for enclosing a tablet computer;a supporting sheet (20) including at least one kind of fo

1. A protection casing of an electronic device with a function of supporting, comprising: a lower casing (10) having an approximately rectangular shape; a periphery of the lower casing being formed with a frame for enclosing a tablet computer;a supporting sheet (20) including at least one kind of foldable traces; the supporting sheet being foldable along the foldable traces so as to present a three dimensional structure;a combining band (201) formed at an upper side of the supporting sheet adhering the supporting sheet to the lower casing; andwherein after assembly the supporting sheet to the lower casing, the supporting sheet can be folded along the foldable traces to form as a seat for standing the lower casing; and an electronic device can be placed on the lower casing for being supporting thereon; andwherein the foldable traces divide the supporting sheet into three triangular sections and two oblong sections, which are formed by locating a point (P) near a lower side of the supporting sheet (20); a foldable line (H) approximately parallel to the lower side of the supporting sheet (20) passing through the point (P); then two foldable lines (Q and R) extending from the point (P) to two upper corners of an upper side of the supporting sheet (20) so that to divide the supporting sheet (20) into three triangular sections (A, B and C); another foldable lines (S) extend downwards from the point (P) to the lower side of the supporting sheet (20) so as to divide the lower portion of the supporting sheet (20) into two oblong sections (D and E); and these sections being connected flexibly so that the adjacent sections are foldable with respective to one another. 2. The protection casing as claimed in claim 1, wherein the three triangular sections (A, B and C) include two approximately right triangles (A and C) clamping an approximately isosceles triangle (B); the longest sides of the approximately right triangles (A and C) are adjacent to the approximately isosceles triangle (B); and a bottom side of each right triangle (A and C) is adjacent to a corresponding oblong sections (D and E); the foldable traces between the different sections of the support plate (20) have weak structures so that they are folded to one another. 3. The protection casing as claimed in claim 1, wherein the electronic device is one of a tablet computer, computer displays, electronic game machines, and personal digital assistants. 4. The protection casing as claimed in claim 1, wherein the lower casing are formed with a plurality of holes, one hole serves for exposing a USB slot, one hole for sound transmission, and other holes for heat dissipation and other functions. 5. A protection casing of an electronic device with a function of supporting, comprising: a lower casing (10) having an approximately rectangular shape; a periphery of the lower casing being formed with a frame for enclosing a tablet computer;a supporting sheet (20) including at least one kind of foldable traces; the supporting sheet being foldable along the foldable traces so as to present a three dimensional structure;a combining band (201) formed at an upper side of the supporting sheet adhering the supporting sheet to the lower casing; andwherein after assembly the supporting sheet to the lower casing, the supporting sheet can be folded along the foldable traces to form as a seat for standing the lower casing; and an electronic device can be placed on the lower casing for being supporting thereon;wherein the lower casing (10) is formed with a hollow hole (101) in a middle portion thereof for receiving the supporting sheet (20);wherein the foldable traces divide the supporting sheet into three triangular sections and two oblong sections, which are formed by locating a point (P) near a lower side of the supporting sheet (20); a foldable line (H) approximately parallel to the lower side of the supporting sheet (20) passing through the point (P); then two foldable lines (Q and R) extending from the point (P) to two upper corners of an upper side of the supporting sheet (20) so that to divide the supporting sheet (20) into three triangular sections (A, B and C); another foldable lines (S) extend downwards from the point (P) to the lower side of the supporting sheet (20) so as to divide the lower portion of the supporting sheet (20) into two oblong sections (D and E); these sections being connected flexibly so that the adjacent sections are foldable with respective to one another. 6. The protection casing as claimed in claim 5, wherein the three triangular sections (A, B and C) include two approximately right triangles (A and C) clamping an approximately isosceles triangle (B); the longest sides of the approximately right triangles (A and C) are adjacent to the approximately isosceles triangle (B); and a bottom side of each right triangle (A and C) is adjacent to a corresponding oblong sections (D and E); the foldable traces between the different sections of the support plate (20) have weak structures so that they are folded to one another. 7. A protection casing of an electronic device with a function of supporting, comprising: a lower casing (10) having an approximately rectangular shape; a periphery of the lower casing being formed with a frame for enclosing a tablet computer;a supporting sheet (20) including at least one kind of foldable traces; the supporting sheet being foldable along the foldable traces so as to present a three dimensional structure;a combining band (201) formed at an upper side of the supporting sheet adhering the supporting sheet to the lower casing; andwherein after assembly the supporting sheet to the lower casing, the supporting sheet can be folded along the foldable traces to form as a seat for standing the lower casing; and an electronic device can be placed on the lower casing for being supporting thereon; andwherein the foldable traces divide the supporting sheet into five triangular sections, which are formed by locating a point (P) near a lower side of the supporting sheet (20); four foldable lines (Q, R, S and T) extending from the point (P) to the four corners of the supporting sheet (20) to divide the upper portion of the supporting sheet (20) into three triangular sections (I, J and K); another foldable lines (U) extend downwards from the point (P) to the lower side of the supporting sheet (20) so as to divide the lower portion of the supporting sheet (20) into two triangular sections (M and N); and these sections are connected flexibly so that the adjacent sections are foldable with respective to one another.