Puzzle block

Abstract

A puzzle block, comprising: eight sub-blocks each having a plurality of faces, the plurality of sub-blocks being stacked one upon another to constitute a cylinder or prism, a plurality of single-unit prints, each being applied on the predetermined faces of the sub-blocks, a plurality of double-unit prints, each being applied on the predetermined two abreast faces of the two adjacent sub-blocks for connecting the sub-blocks, such that the sub-blocks are foldable to change the puzzle block into different forms; wherein the prints on the predetermined faces of the sub-blocks individually or jointly constitute different patterns when the puzzle block is folded to different forms and wherein magnets of opposite polarities are embedded into surfaces of a plurality of predetermined pairs of the sub-blocks.

1 . A puzzle block, comprising:
 eight sub-blocks each having a plurality of faces, the plurality of sub-blocks being stacked one upon another to constitute a cylinder or prism;   a plurality of single-unit prints, each being applied on predetermined faces of the sub-blocks;   a plurality of double-unit prints, each being applied on predetermined two abreast faces of the two adjacent sub-blocks for connecting the sub-blocks, such that the sub-blocks are foldable to change the puzzle block into different forms;   wherein the prints on the predetermined faces of the sub-blocks individually or jointly constitute different patterns when the puzzle block is folded to different forms;   magnets of opposite polarities are embedded into surfaces of a plurality of predetermined pairs of the sub-blocks and are covered by the single-unit or double-unit prints, such that when the puzzle block is folded to different forms, mutual attraction of the magnets provided in the predetermined pairs of the sub-blocks overcomes tension force at bend of the double-unit prints and causes the respective faces of the sub-blocks to abut against each other so as to maintain the form of the puzzle block.   
     
     
         2 . The puzzle block according to  claim 1 , wherein the puzzle block further comprises an annotation card for indicating the initial open position, which is disposed at the contact position between the single-unit prints or the double-unit prints of the adjacent sub-blocks to be initially opened. 
     
     
         3 . The puzzle block according to  claim 1 , wherein during folding of the sub-blocks of the puzzle block, the respective faces of the predetermined pairs of sub-blocks rapidly abut against each other under the action of magnet force and give out a “Beep” sound. 
     
     
         4 . The puzzle block according to  claim 1 , wherein:
 the puzzle block comprising eight cubic sub-blocks each having six faces, the cubic sub-blocks being stacked one upon another to constitute a regular cube;   sixteen single-unit prints; and   sixteen double-unit prints;   wherein a first face, i.e. the top face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a second face, i.e. the front face of the puzzle block when viewed in the initial regular cube form, is provided with two single-unit prints on the upper side and one lateral double-unit print on the lower side;   a third face, i.e. the bottom face of the puzzle block when viewed in the initial regular cube form, is provided with four single-unit prints;   a fourth face, i.e. the back face of the puzzle block when viewed in the initial regular cube form, is provided with one lateral double-unit print on the upper side and two single-unit prints on the lower side;   a fifth face, i.e. the left side face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a sixth face, i.e. the right side face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a seventh face, i.e. the top face of a first rectangular cuboid formed by the puzzle block after the two vertical double-unit prints of first face being opened away from each other, is provided with four lateral double-unit prints;   a eighth face, i.e. the top face of a second rectangular cuboid formed by the puzzle block after being rotated by 180° and the single-unit prints of third face on the upper and lower sides being opened away from each other, is provided with two single-unit prints on each of the left and right sides, and two lateral double-unit prints in the middle;   a ninth face, i.e. the top face of a third rectangular cuboid formed by the puzzle block after the prints of eighth face being opened away from each other in the horizontal direction, is provided with one vertical double-unit print on each of the left and right sides, and four single-unit prints in the middle;   the surfaces of the cubic sub-blocks corresponding to the single-unit of the eighth-face on the upper left side and upper right side are respectively embedded with magnets of opposite polarities; and   the surfaces of the cubic sub-blocks corresponding to the single-unit prints of the ninth-face on the upper right and lower right sides in the middle are respectively embedded with magnets of opposite polarities.   
     
     
         5 . The puzzle block according to  claim 1 , wherein:
 the puzzle block comprising eight cubic sub-blocks each having six faces, the cubic sub-blocks being stacked one upon another to constitute a regular cube;   sixteen single-unit prints; and   sixteen double-unit prints;   wherein a first face, i.e. the top face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a second face, i.e. the front face of the puzzle block when viewed in the initial regular cube form, is provided with two single-unit prints on the upper side and one lateral double-unit print on the lower side;   a third face, i.e. the bottom face of the puzzle block when viewed in the initial regular cube form, is provided with four single-unit prints;   a fourth face, i.e. the back face of the puzzle block when viewed in the initial regular cube form, is provided with one lateral double-unit print on the upper side and two single-unit prints on the lower side;   a fifth face, i.e. the left side face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a sixth face, i.e. the right side face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a seventh face, i.e. the top face of a first rectangular cuboid formed by the puzzle block after the two vertical double-unit prints of the first face on the top face being opened away from each other, is provided with four lateral double-unit prints;   a eighth face, i.e. the top face of a second rectangular cuboid formed by the puzzle block after the prints of the seventh face being opened away from each other in the horizontal direction, is provided with one vertical double-unit print on each of the left and right sides, and four single-unit prints in the middle;   a ninth face, i.e. the top face of a third rectangular cuboid formed by the puzzle block after being rotated by 180° and the single-unit prints of the third face on the upper and lower sides being opened away from each other to form the cuboid provided with the prints of eighth face, and the prints of eighth face being opened away from each other in the horizontal direction, is provided with two vertical double-unit prints on each of the left and right sides, and four single-unit prints in the middle;   the surfaces of the cubic sub-blocks corresponding to the single-unit prints of the eighth face on the upper left side and lower left side in the middle are respectively embedded with magnets of opposite polarities; and   the surfaces of the cubic sub-blocks corresponding to the single-unit prints of the ninth face on the upper right side and lower right side in the middle are respectively embedded with magnets of opposite polarities.   
     
     
         6 . The puzzle block according to  claim 1 , wherein:
 the puzzle block comprising eight cubic sub-blocks each having six faces, the cubic sub-blocks being stacked one upon another to constitute a initial regular cube;   sixteen single-unit prints; and   sixteen double-unit prints;   wherein a first face, i.e. the top face of the puzzle block in the initial regular cube form, is provided with two vertical double-unit prints,   a second face, i.e. the front face of the puzzle block in the initial regular cube form, is provided with two single-unit prints on the upper side and one lateral double-unit print on the lower side,   a third face, i.e. the bottom face of the puzzle block in the initial regular cube form, is provided with four single-unit prints,   a fourth face, i.e. the back face of the puzzle block in the initial regular cube form, is provided with one lateral double-unit print on the upper side and two single-unit prints of the fourth face on the lower side,   a fifth face, i.e. the left side face of the puzzle block in the initial regular cube form, is provided with two vertical double-unit prints,   a sixth face, i.e. the right side face of the puzzle block in the initial regular cube form, is provided with two vertical double-unit prints,   wherein the two vertical double-unit prints of the first face are opened away from each other to form a first cuboid, the prints on the upper and lower sides are opened away from each other in the horizontal direction to form a second cuboid, the prints are further opened from the middle in the vertical direction and being rotated by 90° to form a subsequent regular cube showing six interior surfaces of the sub-blocks,   a seventh face, i.e. the top face of the puzzle block in the subsequent regular cube form, is provided with two vertical double-unit prints.   a eighth face, i.e. the front face of the puzzle block in the subsequent regular cube form, is provided with two single-unit prints on the upper side and one lateral double-unit print on the lower side,   a ninth face, i.e. the bottom face of the puzzle block in the subsequent regular cube form, is provided with four single-unit prints,   a tenth face, i.e. the back face of the puzzle block in the subsequent regular cube form, is provided with one lateral double-unit print on the upper side and two double-unit prints on the lower side,   an eleventh face, i.e. the left side face of the puzzle block in the subsequent regular cube form, is provided with two vertical double-unit prints,   a twelfth face, i.e. the right side face of the puzzle block in the subsequent regular cube form, is provided with two vertical double-unit prints.   wherein the two surfaces corresponding to the two single-unit prints of the second face on the upper side are embedded with magnets of opposite polarities,   the two surfaces corresponding to the two single-unit prints of the third face on the right side are embedded with magnets of opposite polarities,   the two surfaces corresponding to the two single-unit prints of the eighth face on the upper side are embedded with magnets of opposite polarities,   the two surfaces corresponding to the two single-unit prints of the ninth face on the left side are embedded with magnets of opposite polarities.   
     
     
         7 . The puzzle block according to  claim 1 , comprising:
 eight triangular-prism sub-blocks, each having five faces including two top faces, two right-angle faces and one inclined face, the triangular-prism sub-blocks being stacked one upon another to constitute a cube;   eight single-unit prints; and   sixteen double-unit prints;   wherein a first face, i.e. the front face of the puzzle block in its initial form, is provided with four double-unit prints,   a second face, i.e. the inclined face of the puzzle block after the two double-unit prints of the first face being rotated relative to the other two double-unit prints of the first face to form a first triangular prism, is provided with two lateral double-unit prints,   a third face, i.e. the front face of the puzzle block in a state after the two lateral double-unit prints of the second face being opened away from each other, is provided with two vertical double-unit prints,   a fourth face, i.e. the inclined face of the puzzle block in a state after the two vertical double-unit prints of the third face being opened to form a second triangular prism, is provided with four lateral double-unit prints,   a fifth face, i.e. the front face of the puzzle block in a state after the lateral double-unit prints of the fourth face on upper and lower sides being opened in the horizontal direction, is provided with one vertical double-unit print on each of the left and right sides, and four single-unit prints in the middle,   a sixth face, i.e. the front face of the puzzle block after a 180° turn of the first face when the puzzle block being reverted to the first face position after being folded in the vertical direction, is provided with two single-unit prints on each of the upper left side and lower right side, and one double-unit print on each of the lower left side and the upper right side,   wherein the pair of surfaces corresponding to the single-unit prints of the fifth face on the upper right side and lower right side in the middle are respectively embedded with magnets of opposite polarities,   the surfaces corresponding to the two double-unit prints of the sixth face on the lower left side and upper right side are embedded with two magnets of opposite polarities.   
     
     
         8 . The puzzle block according to  claim 1 , comprising:
 eight ¼ cylindrical sub-blocks, each having five faces including two top faces, two side faces and one face, the ¼ cylindrical sub-blocks being stacked one upon another to constitute a cylinder;   eight single-unit prints; and   sixteen double-unit prints;   wherein the front face of the lying puzzle block is provided with one double-unit print of a first face on each of the left and right sides, the back face is provided with four single-unit prints of the first face at four corners, the left side face is provided with one double-unit print of a fifth face on each of the upper and lower sides, the right side is provided with one double-unit print of a fourth face on each of the upper and lower sides,   when the puzzle block is in a state after the two double-unit prints of the first face being opened in the vertical direction to form a semi-cylinder, the front face of the puzzle block is provided with four vertical double-unit prints of a second face at four corners,   when the puzzle block is in a state after the four vertical double-unit prints of the second face being opened in the horizontal direction, the front face of the puzzle block is provided with one lateral double-unit print of a third face on each of the left and right sides, and with one vertical double-unit prints of the third face on each the upper and lower sides in the middle,   the puzzle block is formed into two semi-cylinders by folding the vertical double-unit prints of the third face along the horizontal centerline, and is then formed into two cylinders by folding the two vertical double-unit prints of the second face along the horizontal centerline, a top face of the left cylinder is provided with one double-unit print of a sixth face on the left side and two single-unit prints of the sixth face on the right side, a top face of the right cylinder is provided with a double-unit print of a seventh face on the right side and two single-unit prints of the seventh face on the left side,   wherein the surfaces of the ¼ cylinder adjacent to the left and right ends of the vertical double-unit print of the second face on the upper right side is provided with magnets of opposite polarities,   the surfaces of the ¼ cylinder adjacent to the left and right ends of the vertical double-unit print of the second face on the lower left side are provided with magnets of opposite polarities,   the surfaces of the ¼ cylinders adjacent to the left and right ends of the vertical double-unit prints of the third face on the upper and lower sides in the middle are provided with magnets of opposite polarities.   
     
     
         9 . The puzzle block according to  claim 2 , wherein during folding of the sub-blocks of the puzzle block, the respective faces of the predetermined pairs of sub-blocks rapidly abut against each other under the action of magnet force and give out a “Beep” sound. 
     
     
         10 . The puzzle block according to  claim 2 , wherein:
 the puzzle block comprising eight cubic sub-blocks each having six faces, the cubic sub-blocks being stacked one upon another to constitute a regular cube;   sixteen single-unit prints; and   sixteen double-unit prints;   wherein a first face, i.e. the top face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a second face, i.e. the front face of the puzzle block when viewed in the initial regular cube form, is provided with two single-unit prints on the upper side and one lateral double-unit print on the lower side;   a third face, i.e. the bottom face of the puzzle block when viewed in the initial regular cube form, is provided with four single-unit prints;   a fourth face, i.e. the back face of the puzzle block when viewed in the initial regular cube form, is provided with one lateral double-unit print on the upper side and two single-unit prints on the lower side;   a fifth face, i.e. the left side face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a sixth face, i.e. the right side face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a seventh face, i.e. the top face of a first rectangular cuboid formed by the puzzle block after the two vertical double-unit prints of first face being opened away from each other, is provided with four lateral double-unit prints;   a eighth face, i.e. the top face of a second rectangular cuboid formed by the puzzle block after being rotated by 180° and the single-unit prints of third face on the upper and lower sides being opened away from each other, is provided with two single-unit prints on each of the left and right sides, and two lateral double-unit prints in the middle;   a ninth face, i.e. the top face of a third rectangular cuboid formed by the puzzle block after the prints of eighth face being opened away from each other in the horizontal direction, is provided with one vertical double-unit print on each of the left and right sides, and four single-unit prints in the middle;   the surfaces of the cubic sub-blocks corresponding to the single-unit of the eighth-face on the upper left side and upper right side are respectively embedded with magnets of opposite polarities; and   the surfaces of the cubic sub-blocks corresponding to the single-unit prints of the ninth-face on the upper right and lower right sides in the middle are respectively embedded with magnets of opposite polarities.   
     
     
         11 . The puzzle block according to  claim 3 , wherein:
 the puzzle block comprising eight cubic sub-blocks each having six faces, the cubic sub-blocks being stacked one upon another to constitute a regular cube;   sixteen single-unit prints; and   sixteen double-unit prints;   wherein a first face, i.e. the top face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a second face, i.e. the front face of the puzzle block when viewed in the initial regular cube form, is provided with two single-unit prints on the upper side and one lateral double-unit print on the lower side;   a third face, i.e. the bottom face of the puzzle block when viewed in the initial regular cube form, is provided with four single-unit prints;   a fourth face, i.e. the back face of the puzzle block when viewed in the initial regular cube form, is provided with one lateral double-unit print on the upper side and two single-unit prints on the lower side;   a fifth face, i.e. the left side face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a sixth face, i.e. the right side face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a seventh face, i.e. the top face of a first rectangular cuboid formed by the puzzle block after the two vertical double-unit prints of first face being opened away from each other, is provided with four lateral double-unit prints;   a eighth face, i.e. the top face of a second rectangular cuboid formed by the puzzle block after being rotated by 180° and the single-unit prints of third face on the upper and lower sides being opened away from each other, is provided with two single-unit prints on each of the left and right sides, and two lateral double-unit prints in the middle;   a ninth face, i.e. the top face of a third rectangular cuboid formed by the puzzle block after the prints of eighth face being opened away from each other in the horizontal direction, is provided with one vertical double-unit print on each of the left and right sides, and four single-unit prints in the middle;   the surfaces of the cubic sub-blocks corresponding to the single-unit of the eighth-face on the upper left side and upper right side are respectively embedded with magnets of opposite polarities; and   the surfaces of the cubic sub-blocks corresponding to the single-unit prints of the ninth-face on the upper right and lower right sides in the middle are respectively embedded with magnets of opposite polarities.   
     
     
         12 . The puzzle block according to  claim 2 , wherein:
 the puzzle block comprising eight cubic sub-blocks each having six faces, the cubic sub-blocks being stacked one upon another to constitute a regular cube;   sixteen single-unit prints; and   sixteen double-unit prints;   wherein a first face, i.e. the top face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a second face, i.e. the front face of the puzzle block when viewed in the initial regular cube form, is provided with two single-unit prints on the upper side and one lateral double-unit print on the lower side;   a third face, i.e. the bottom face of the puzzle block when viewed in the initial regular cube form, is provided with four single-unit prints;   a fourth face, i.e. the back face of the puzzle block when viewed in the initial regular cube form, is provided with one lateral double-unit print on the upper side and two single-unit prints on the lower side;   a fifth face, i.e. the left side face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a sixth face, i.e. the right side face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a seventh face, i.e. the top face of a first rectangular cuboid formed by the puzzle block after the two vertical double-unit prints of the first face on the top face being opened away from each other, is provided with four lateral double-unit prints;   a eighth face, i.e. the top face of a second rectangular cuboid formed by the puzzle block after the prints of the seventh face being opened away from each other in the horizontal direction, is provided with one vertical double-unit print on each of the left and right sides, and four single-unit prints in the middle;   a ninth face, i.e. the top face of a third rectangular cuboid formed by the puzzle block after being rotated by 180° and the single-unit prints of the third face on the upper and lower sides being opened away from each other to form the cuboid provided with the prints of eighth face, and the prints of eighth face being opened away from each other in the horizontal direction, is provided with two vertical double-unit prints on each of the left and right sides, and four single-unit prints in the middle;   the surfaces of the cubic sub-blocks corresponding to the single-unit prints of the eighth face on the upper left side and lower left side in the middle are respectively embedded with magnets of opposite polarities; and   the surfaces of the cubic sub-blocks corresponding to the single-unit prints of the ninth face on the upper right side and lower right side in the middle are respectively embedded with magnets of opposite polarities.   
     
     
         13 . The puzzle block according to  claim 3 , wherein:
 the puzzle block comprising eight cubic sub-blocks each having six faces, the cubic sub-blocks being stacked one upon another to constitute a regular cube;   sixteen single-unit prints; and   sixteen double-unit prints;   wherein a first face, i.e. the top face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a second face, i.e. the front face of the puzzle block when viewed in the initial regular cube form, is provided with two single-unit prints on the upper side and one lateral double-unit print on the lower side;   a third face, i.e. the bottom face of the puzzle block when viewed in the initial regular cube form, is provided with four single-unit prints;   a fourth face, i.e. the back face of the puzzle block when viewed in the initial regular cube form, is provided with one lateral double-unit print on the upper side and two single-unit prints on the lower side;   a fifth face, i.e. the left side face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a sixth face, i.e. the right side face of the puzzle block when viewed in the initial regular cube form, is provided with two vertical double-unit prints;   a seventh face, i.e. the top face of a first rectangular cuboid formed by the puzzle block after the two vertical double-unit prints of the first face on the top face being opened away from each other, is provided with four lateral double-unit prints;   a eighth face, i.e. the top face of a second rectangular cuboid formed by the puzzle block after the prints of the seventh face being opened away from each other in the horizontal direction, is provided with one vertical double-unit print on each of the left and right sides, and four single-unit prints in the middle;   a ninth face, i.e. the top face of a third rectangular cuboid formed by the puzzle block after being rotated by 180° and the single-unit prints of the third face on the upper and lower sides being opened away from each other to form the cuboid provided with the prints of eighth face, and the prints of eighth face being opened away from each other in the horizontal direction, is provided with two vertical double-unit prints on each of the left and right sides, and four single-unit prints in the middle;   the surfaces of the cubic sub-blocks corresponding to the single-unit prints of the eighth face on the upper left side and lower left side in the middle are respectively embedded with magnets of opposite polarities; and   the surfaces of the cubic sub-blocks corresponding to the single-unit prints of the ninth face on the upper right side and lower right side in the middle are respectively embedded with magnets of opposite polarities.   
     
     
         14 . The puzzle block according to  claim 2 , wherein:
 the puzzle block comprising eight cubic sub-blocks each having six faces, the cubic sub-blocks being stacked one upon another to constitute a initial regular cube;   sixteen single-unit prints; and   sixteen double-unit prints;   wherein a first face, i.e. the top face of the puzzle block in the initial regular cube form, is provided with two vertical double-unit prints,   a second face, i.e. the front face of the puzzle block in the initial regular cube form, is provided with two single-unit prints on the upper side and one lateral double-unit print on the lower side,   a third face, i.e. the bottom face of the puzzle block in the initial regular cube form, is provided with four single-unit prints,   a fourth face, i.e. the back face of the puzzle block in the initial regular cube form, is provided with one lateral double-unit print on the upper side and two single-unit prints of the fourth face on the lower side,   a fifth face, i.e. the left side face of the puzzle block in the initial regular cube form, is provided with two vertical double-unit prints,   a sixth face, i.e. the right side face of the puzzle block in the initial regular cube form, is provided with two vertical double-unit prints,   wherein the two vertical double-unit prints of the first face are opened away from each other to form a first cuboid, the prints on the upper and lower sides are opened away from each other in the horizontal direction to form a second cuboid, the prints are further opened from the middle in the vertical direction and being rotated by 90° to form a subsequent regular cube showing six interior surfaces of the sub-blocks,   a seventh face, i.e. the top face of the puzzle block in the subsequent regular cube form, is provided with two vertical double-unit prints.   a eighth face, i.e. the front face of the puzzle block in the subsequent regular cube form, is provided with two single-unit prints on the upper side and one lateral double-unit print on the lower side,   a ninth face, i.e. the bottom face of the puzzle block in the subsequent regular cube form, is provided with four single-unit prints,   a tenth face, i.e. the back face of the puzzle block in the subsequent regular cube form, is provided with one lateral double-unit print on the upper side and two double-unit prints on the lower side,   an eleventh face, i.e. the left side face of the puzzle block in the subsequent regular cube form, is provided with two vertical double-unit prints,   a twelfth face, i.e. the right side face of the puzzle block in the subsequent regular cube form, is provided with two vertical double-unit prints.   wherein the two surfaces corresponding to the two single-unit prints of the second face on the upper side are embedded with magnets of opposite polarities,   the two surfaces corresponding to the two single-unit prints of the third face on the right side are embedded with magnets of opposite polarities,   the two surfaces corresponding to the two single-unit prints of the eighth face on the upper side are embedded with magnets of opposite polarities,   the two surfaces corresponding to the two single-unit prints of the ninth face on the left side are embedded with magnets of opposite polarities.   
     
     
         15 . The puzzle block according to  claim 3 , wherein:
 the puzzle block comprising eight cubic sub-blocks each having six faces, the cubic sub-blocks being stacked one upon another to constitute a initial regular cube;   sixteen single-unit prints; and   sixteen double-unit prints;   wherein a first face, i.e. the top face of the puzzle block in the initial regular cube form, is provided with two vertical double-unit prints,   a second face, i.e. the front face of the puzzle block in the initial regular cube form, is provided with two single-unit prints on the upper side and one lateral double-unit print on the lower side,   a third face, i.e. the bottom face of the puzzle block in the initial regular cube form, is provided with four single-unit prints,   a fourth face, i.e. the back face of the puzzle block in the initial regular cube form, is provided with one lateral double-unit print on the upper side and two single-unit prints or the fourth face on the lower side,   a fifth face, i.e. the left side face of the puzzle block in the initial regular cube form, is provided with two vertical double-unit prints,   a sixth face, i.e. the right side face of the puzzle block in the initial regular cube form, is provided with two vertical double-unit prints,   wherein the two vertical double-unit prints of the first face are opened away from each other to form a first cuboid, the prints on the upper and lower sides are opened away from each other in the horizontal direction to form a second cuboid, the prints are further opened from the middle in the vertical direction and being rotated by 90° to form a subsequent regular cube showing six interior surfaces of the sub-blocks,   a seventh face, i.e. the top face of the puzzle block in the subsequent regular cube form, is provided with two vertical double-unit prints.   a eighth face, i.e. the front face of the puzzle block in the subsequent regular cube form, is provided with two single-unit prints on the upper side and one lateral double-unit print on the lower side,   a ninth face, i.e. the bottom face of the puzzle block in the subsequent regular cube form, is provided with four single-unit prints,   a tenth face, i.e. the back face of the puzzle block in the subsequent regular cube form, is provided with one lateral double-unit print on the upper side and two double-unit prints on the lower side,   an eleventh face, i.e. the left side face of the puzzle block in the subsequent regular cube form, is provided with two vertical double-unit prints,   a twelfth face, i.e. the right side face of the puzzle block in the subsequent regular cube form, is provided with two vertical double-unit prints.   wherein the two surfaces corresponding to the two single-unit prints of the second face on the upper side are embedded with magnets of opposite polarities,   the two surfaces corresponding to the two single-unit prints of the third face on the right side are embedded with magnets of opposite polarities,   the two surfaces corresponding to the two single-unit prints of the eighth face on the upper side are embedded with magnets of opposite polarities,   the two surfaces corresponding to the two single-unit prints of the ninth face on the left side are embedded with magnets of opposite polarities.   
     
     
         16 . The puzzle block according to  claim 2 , comprising:
 eight triangular-prism sub-blocks, each having five faces including two top faces, two right-angle faces and one inclined face, the triangular-prism sub-blocks being stacked one upon another to constitute a cube;   eight single-unit prints; and   sixteen double-unit prints;   wherein a first face, i.e. the front face of the puzzle block in its initial form, is provided with four double-unit prints,   a second face, i.e. the inclined face of the puzzle block after the two double-unit prints of the first face being rotated relative to the other two double-unit prints of the first face to form a first triangular prism, is provided with two lateral double-unit prints,   a third face, i.e. the front face of the puzzle block in a state after the two lateral double-unit prints of the second face being opened away from each other, is provided with two vertical double-unit prints,   a fourth face, i.e. the inclined face of the puzzle block in a state after the two vertical double-unit prints of the third face being opened to form a second triangular prism, is provided with four lateral double-unit prints,   a fifth face, i.e. the front face of the puzzle block in a state after the lateral double-unit prints of the fourth face on upper and lower sides being opened in the horizontal direction, is provided with one vertical double-unit print on each of the left and right sides, and four single-unit prints in the middle,   a sixth face, i.e. the front face of the puzzle block after a 180° turn of the first face when the puzzle block being reverted to the first face position after being folded in the vertical direction, is provided with two single-unit prints on each of the upper left side and lower right side, and one double-unit print on each of the lower left side and the upper right side,   wherein the pair of surfaces corresponding to the single-unit prints of the fifth face on the upper right side and lower right side in the middle are respectively embedded with magnets of opposite polarities,   the surfaces corresponding to the two double-unit prints of the sixth face on the lower left side and upper right side are embedded with two magnets of opposite polarities.   
     
     
         17 . The puzzle block according to  claim 3 , comprising:
 eight triangular-prism sub-blocks, each having five faces including two top faces, two right-angle faces and one inclined face, the triangular-prism sub-blocks being stacked one upon another to constitute a cube;   eight single-unit prints; and   sixteen double-unit prints;   wherein a first face, i.e. the front face of the puzzle block in its initial form, is provided with four double-unit prints,   a second face, i.e. the inclined face of the puzzle block after the two double-unit prints of the first face being rotated relative to the other two double-unit prints of the first face to form a first triangular prism, is provided with two lateral double-unit prints,   a third face, i.e. the front face of the puzzle block in a state after the two lateral double-unit prints of the second face being opened away from each other, is provided with two vertical double-unit prints,   a fourth face, i.e. the inclined face of the puzzle block in a state after the two vertical double-unit prints of the third face being opened to form a second triangular prism, is provided with four lateral double-unit prints,   a fifth face, i.e. the front face of the puzzle block in a state after the lateral double-unit prints of the fourth face on upper and lower sides being opened in the horizontal direction, is provided with one vertical double-unit print on each of the left and right sides, and four single-unit prints in the middle,   a sixth face, i.e. the front face of the puzzle block after a 180° turn of the first face when the puzzle block being reverted to the first face position after being folded in the vertical direction, is provided with two single-unit prints on each of the upper left side and lower right side, and one double-unit print on each of the lower left side and the upper right side,   wherein the pair of surfaces corresponding to the single-unit prints of the fifth face on the upper right side and lower right side in the middle are respectively embedded with magnets of opposite polarities,   the surfaces corresponding to the two double-unit prints of the sixth face on the lower left side and upper right side are embedded with two magnets of opposite polarities.   
     
     
         18 . The puzzle block according to  claim 2 , comprising:
 eight ¼ cylindrical sub-blocks, each having five faces including two top faces, two side faces and one face, the ¼ cylindrical sub-blocks being stacked one upon another to constitute a cylinder;   eight single-unit prints; and   sixteen double-unit prints;   wherein the front face of the lying puzzle block is provided with one double-unit print of a first face on each of the left and right sides, the back face is provided with four single-unit prints of the first face at four corners, the left side face is provided with one double-unit print of a fifth face on each of the upper and lower sides, the right side is provided with one double-unit print of a fourth face on each of the upper and lower sides,   when the puzzle block is in a state after the two double-unit prints of the first face being opened in the vertical direction to form a semi-cylinder, the front face of the puzzle block is provided with four vertical double-unit prints of a second face at four corners,   when the puzzle block is in a state after the four vertical double-unit prints of the second face being opened in the horizontal direction, the front face of the puzzle block is provided with one lateral double-unit print of a third face on each of the left and right sides, and with one vertical double-unit prints of the third face on each the upper and lower sides in the middle,   the puzzle block is formed into two semi-cylinders by folding the vertical double-unit prints of the third face along the horizontal centerline, and is then formed into two cylinders by folding the two vertical double-unit prints of the second face along the horizontal centerline, a top face of the left cylinder is provided with one double-unit print of a sixth face on the left side and two single-unit prints of the sixth face on the right side, a top face of the right cylinder is provided with a double-unit print of a seventh face on the right side and two single-unit prints of the seventh face on the left side,   wherein the surfaces of the ¼ cylinder adjacent to the left and right ends of the vertical double-unit print of the second face on the upper right side is provided with magnets of opposite polarities,   the surfaces of the ¼ cylinder adjacent to the left and right ends of the vertical double-unit print of the second face on the lower left side are provided with magnets of opposite polarities,   the surfaces of the ¼ cylinders adjacent to the left and right ends of the vertical double-unit prints of the third face on the upper and lower sides in the middle are provided with magnets of opposite polarities.   
     
     
         19 . The puzzle block according to  claim 3 , comprising:
 eight ¼ cylindrical sub-blocks, each having five faces including two top faces, two side faces and one face, the ¼ cylindrical sub-blocks being stacked one upon another to constitute a cylinder;   eight single-unit prints; and   sixteen double-unit prints:   wherein the front face of the lying puzzle block is provided with one double-unit print of a first face on each of the left and right sides, the back face is provided with four single-unit prints of the first face at four corners, the left side face is provided with one double-unit print of a fifth face on each of the upper and lower sides, the right side is provided with one double-unit print of a fourth face on each of the upper and lower sides,   when the puzzle block is in a state after the two double-unit prints of the first face being opened in the vertical direction to form a semi-cylinder, the front face of the puzzle block is provided with four vertical double-unit prints of a second face at four corners,   when the puzzle block is in a state after the four vertical double-unit prints of the second face being opened in the horizontal direction, the front face of the puzzle block is provided with one lateral double-unit print of a third face on each of the left and right sides, and with one vertical double-unit prints of the third face on each the upper and lower sides in the middle,   the puzzle block is formed into two semi-cylinders by folding the vertical double-unit prints of the third face along the horizontal centerline, and is then formed into two cylinders by folding the two vertical double-unit prints of the second face along the horizontal centerline, a top face of the left cylinder is provided with one double-unit print of a sixth face on the left side and two single-unit prints of the sixth face on the right side, a top face of the right cylinder is provided with a double-unit print of a seventh face on the right side and two single-unit prints of the seventh face on the left side,   wherein the surfaces of the ¼ cylinder adjacent to the left and right ends of the vertical double-unit print of the second face on the upper right side is provided with magnets of opposite polarities,   the surfaces of the ¼ cylinder adjacent to the left and right ends of the vertical double-unit print of the second face on the lower left side are provided with magnets of opposite polarities,   the surfaces of the ¼ cylinders adjacent to the left and right ends of the vertical double-unit prints of the third face on the upper and lower sides in the middle are provided with magnets of opposite polarities.