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A portable standing desk device has a top board, four block assemblies each having a groove, a first base panel, and a second base panel. The first base panel has an open ended slot extending upwardly from a bottom surface of the base panel. The second base panel has an open ended slot extending dow

A portable standing desk device has a top board, four block assemblies each having a groove, a first base panel, and a second base panel. The first base panel has an open ended slot extending upwardly from a bottom surface of the base panel. The second base panel has an open ended slot extending downwardly from a top surface of the base panel. The open ended slots may be strengthened by U-shaped reinforcing elements. In an assembled condition, the first base panel and the second base panel form a base having a letter X shape. The first base panel and the second base panel may be coupled with angle adjusters to be assembled with different top boards having different sets of block assemblies. In a storage condition, the portable standing desk device is compactly packed.

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1. A portable standing desk device comprising: a first top board having a top surface and a bottom surface opposite the top surface;a first set of four separated block assemblies attached to the bottom surface of the first top board, the first set of the four separated block assemblies including a f

1. A portable standing desk device comprising: a first top board having a top surface and a bottom surface opposite the top surface;a first set of four separated block assemblies attached to the bottom surface of the first top board, the first set of the four separated block assemblies including a first block assembly having a first groove;a second block assembly having a second groove;a third block assembly having a third groove; anda fourth block assembly having a fourth groove;a center of the first groove, a center of the second groove, a center of the third groove, and a center of the fourth groove being located at four corners of a first imaginary rectangle,the first groove and the third groove being diagonally opposed,the second groove and the fourth groove being diagonally opposed;a first base panel having a first open ended slot extending upwardly from a bottom surface of the first base panel; anda second base panel having a second open ended slot extending downwardly from a top surface of the second base panel;wherein the portable standing desk device is characterized by a first assembled condition in which the first and second base panels are interlocked so as to form a base having a letter X shape;a top surface of the first base panel and the top surface of the second base panel contact the bottom surface of the first top board;portions of the top surface of the first base panel are in the first and third grooves respectively; andportions of the top surface of the second base panel are in the second and fourth grooves respectively; anda storage condition in which a first side surface of the first base panel contacts a second side surface of the second base panel so as to form a base panel stack; andwherein a first acute angle in degrees between a normal direction of the first side surface of the first base panel and a first side wall of the first open ended slot is determined by a mathematical expression {2×[arctangent(L/W)×180/π]−90};wherein L is a length of the first imaginary rectangle; W is a width of the first imaginary rectangle;L/W is a slenderness ratio of the first imaginary rectangle;L is larger than W;π is a mathematical constant, a ratio of a circle's circumference to a diameter of the circle; andarctangent is an inverse trigonometric function. 2. The portable standing desk device of claim 1, wherein a length of the first open ended slot is longer than a half of a height of the first base panel and a length of the second open ended slot is longer than a half of a height of the second base panel. 3. The portable standing desk device of claim 1 further comprising a second top board having a top surface and a bottom surface opposite the top surface;a second set of four separated block assemblies attached to the bottom surface of the second top board, the second set of the four separated block assemblies including a fifth, sixth, seventh, and eighth block assemblies having a fifth, sixth, seventh, and eighth grooves respectively, centers of the fifth, sixth, seventh, and eighth grooves being located at four corners of a second imaginary rectangle respectively;a first, second, third, and fourth angle adjusters;wherein the portable standing desk device is further characterized by a second assembled condition in which the first and second angle adjusters are attached to the first and a second side walls of the first open ended slot;the third and fourth angle adjusters are attached to a third and fourth side walls of the second open ended slot;the first and second base panels are interlocked so as to form a base having a letter X shape;portions of the top surface of the first base panel are in the fifth and seventh grooves respectively; andportions of the top surface of the second base panel are in the sixth and eighth grooves respectively. 4. The portable standing desk device of claim 3, wherein a second acute angle between the normal direction of the first side surface of the first base panel and a first side wall of the first angle adjuster is determined by substitution of a slenderness ratio of the second imaginary rectangle into the mathematical expression. 5. The portable standing desk device of claim 4, wherein the second acute angle is larger than the first acute angle. 6. The portable standing desk device of claim 1 further comprising a first and second angle adjusters attached to a first and second side walls of the first open ended slot and a third and fourth angle adjusters attached to a third and fourth side walls of the second open ended slot. 7. The portable standing desk device of claim 1, wherein the portable standing desk device is further characterized by the first assembled condition in which the portions of the top surface of the first base panel are press-fitted into the first and third grooves respectively; andthe portions of the top surface of the second base panel are press-fitted into the second and fourth grooves respectively. 8. The portable standing desk device of claim 1, wherein each of the first, second, third and fourth block assemblies is a two-piece constructed assembly having a first and second pieces and wherein the first and second pieces of each of the first, second, third and fourth block assemblies are separated by a corresponding groove of the first, second, third and fourth grooves. 9. The portable standing desk device of claim 1, wherein each of the first, second, third and fourth block assemblies is a one-piece constructed assembly having a single piece; wherein the single piece of each of the first, second, third and fourth block assemblies has a corresponding groove of the first, second, third and fourth grooves in a middle region thereof; andwherein the corresponding groove faces downwardly. 10. A portable standing desk device comprising: a first top board having a top surface and a bottom surface opposite the top surface;a first set of four separated block assemblies attached to the bottom surface of the first top board, the first set of the four separated block assemblies including a first block assembly having a first groove;a second block assembly having a second groove;a third block assembly having a third groove; anda fourth block assembly having a fourth groove;a center of the first groove, a center of the second groove, a center of the third groove, and a center of the fourth groove being located at four corners of a first imaginary rectangle,the first groove and the third groove being diagonally opposed,the second groove and the fourth groove being diagonally opposed;a first base panel having a first open ended slot extending upwardly from a bottom surface of the first base panel; anda second base panel having a second open ended slot extending downwardly from a top surface of the second base panel;wherein the portable standing desk device is characterized by a first assembled condition in which the first and second base panels are interlocked so as to form a base having a letter X shape;a top surface of the first base panel and the top surface of the second base panel contact the bottom surface of the first top board;portions of the top surface of the first base panel are in the first and third grooves respectively; andportions of the top surface of the second base panel are in the second and fourth grooves respectively; anda storage condition in which a first side surface of the first base panel contacts a second side surface of the second base panel so as to form a base panel stack;wherein a height of the first set of four separated block assemblies is twice of a thickness of the first or second base panel; andwherein the portable standing desk device is further characterized by the storage condition in which a first surface of the base panel stack contacts the bottom surface of the first top board;a second surface of the base panel stack and bottom surfaces of the first set of four separated block assemblies are co-planar;the second surface of the base panel stack is opposing the first surface of the base panel stack;a third surface of the base panel stack contacts a side surface of the first block assembly and a side surface of the second block assembly;a fourth surface of the base panel stack contacts a side surface of the third block assembly and a side surface of the fourth block assembly; andthe fourth surface of the base panel stack is opposing the second surface of the base panel stack. 11. The portable standing desk device of claim 10, wherein the portable standing desk device is further characterized by the storage condition in which a fifth surface of the base panel stack and a first side surface of the first top board are co-planar;a sixth surface of the base panel stack and a second side surface of the first top board are co-planar;the sixth surface of the base panel stack is opposing the fifth surface of the base panel stack; andthe second side surface of the first top board is opposing the first side surface of the first top board. 12. A portable standing desk device comprising: a first top board having a top surface and a bottom surface opposite the top surface;a first set of four separated block assemblies attached to the bottom surface of the first top board, the first set of the four separated block assemblies including a first block assembly having a first groove;a second block assembly having a second groove;a third block assembly having a third groove; anda fourth block assembly having a fourth groove;a center of the first groove, a center of the second groove, a center of the third groove, and a center of the fourth groove being located at four corners of a first imaginary rectangle,the first groove and the third groove being diagonally opposed,the second groove and the fourth groove being diagonally opposed;a first base panel having a first open ended slot extending upwardly from a bottom surface of the first base panel; anda second base panel having a second open ended slot extending downwardly from a top surface of the second base panel;wherein the portable standing desk device is characterized by a first assembled condition in which the first and second base panels are interlocked so as to form a base having a letter X shape;a top surface of the first base panel and the top surface of the second base panel contact the bottom surface of the first top board;portions of the top surface of the first base panel are in the first and third grooves respectively; andportions of the top surface of the second base panel are in the second and fourth grooves respectively; anda storage condition in which a first side surface of the first base panel contacts a second side surface of the second base panel so as to form a base panel stack; andwherein a first U-shaped reinforcing element is attached to an end of the first open ended slot and a second U-shaped reinforcing element is attached to an end of the second open ended slot. 13. The portable standing desk device of claim 12, wherein the portable standing desk device is further characterized by the first assembled condition in which a bottom surface of the first U-shaped reinforcing element contacts a top surface of the second U-shaped reinforcing element.