CN212067700U - Third-order magic cube is with lid and third-order magic cube in going up and down - Google Patents

Abstract

The utility model discloses a lifting middle cover for a three-order magic cube, which is erected by an internal support frame, wherein the support frame is composed of a cylinder sleeved with a screw, and the screw is sleeved with a spring; the lifting middle cover comprises a bottom frame, a top frame and a top cover, wherein an octagonal cylindrical shell is arranged in the bottom frame, a U-shaped block clamped with a rectangular magnet block is arranged between the octagonal cylindrical shell and an edge strip of the bottom frame, a positioning ring and a triangle-like block are arranged in the top frame, the triangle-like block covers an opening of the U-shaped block, a screw penetrates through the positioning ring, clamping columns are arranged on the periphery of the lower surface of the top cover, U-shaped bayonets with downward openings are formed between adjacent clamping columns and the top cover, and the depths of the adjacent U-shaped bayonets are different; the utility model discloses still provide a third-order magic cube, lid, hornblock and arris piece in going up and down. The utility model discloses a U-shaped bayonet socket that the degree of depth differs, the relative height of adjustable top cap and top frame makes the top cap protruding or flush to form the raising and lowering functions of top cap, make magic cube variability and object for appreciation nature abundanter, be favorable to the further popularization of magic cube motion.

Description

Third-order magic cube is with lid and third-order magic cube in going up and down

Technical Field

The utility model relates to a magic cube technical field especially relates to a third-order magic cube is with lid and third-order magic cube in going up and down.

Background

The three-order magic cube comprises center block (6), arris piece (12) and angle piece (8) and center pin (1). The existing main magic cube product is assembled by hard cubes, has poor touch feeling, is easy to damage once being dropped on the ground, but is difficult to disassemble and maintain due to the assembly of the existing magic cube, so that the playing performance is low; and the existing product has lower recognition degree and attractive appearance, and sometimes the product is turned to be one card for one card when rotating, so that the pause feeling is larger, and the hand feeling is seriously influenced.

On the other hand, the three-order magic cube is generally distinguished by colors, the magic cube has six surfaces, and the position of the middle block in the middle of each surface is not changed. Previously, the height of the middle cover on the middle block and the height of the eight blocks beside are basically on a plane, and if the height of the middle cover is higher than the plane, the significance is that fingers can be positioned more clearly when the magic cube is welcomed. As long as the finger touches the raised middle cover, the corresponding position of the finger is known. Therefore, the position relation between the hand and the magic cube is better known, the state is more reasonable, and the reduction method is better completed. However, a magic cube product with the height of the middle cover capable of being adjusted is still lacked in the market at present, the middle cover is protruded to be replaced by a new middle cover with different heights to cover the middle block, so that the magic cube is not beneficial to temporary adjustment and magic cube recovery, and the limit challenges of novice teaching and professionals are not benefited.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art, and providing a lifting middle cover for a three-order magic cube and the three-order magic cube.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a lifting middle cover for a three-order magic cube and the three-order magic cube are erected by an internal support frame, the support frame comprises 6 cylinders which are mutually vertical along a three-dimensional coordinate axis, one end surfaces of the 6 cylinders are intersected at one position, a screw hole is formed in the center of the other end surface of any cylinder, a screw is sleeved inside the screw hole of the cylinder, a nut is arranged at one end, away from the cylinder, of the screw, and a spring is sleeved on the rod wall of the screw;

the lifting middle cover comprises a bottom frame, a top frame and a top cover, wherein the peripheries of the bottom frame and the top frame are both space octagonal edgings, an octagonal cylindrical shell is arranged inside the bottom frame and fixedly connected with the edgings of the bottom frame through four symmetrically distributed U-shaped blocks, the openings of the U-shaped blocks face upwards and are clamped with rectangular magnet blocks, a positioning circular ring is arranged inside the top frame, the upper surface of the positioning circular ring is fixedly connected with the edgings of the top frame through four symmetrically distributed triangle-like blocks, the positioning circular ring is sleeved in the octagonal cylindrical shell of the bottom frame, the lower surface of the edgings of the top frame is provided with four symmetrically arranged supporting arc sheets, the supporting arc sheets are in contact with the upper surfaces of the edgings of the bottom frame, the triangle-like blocks cover the openings of the U-shaped blocks, screws penetrate through the positioning circular rings, springs are positioned above the positioning circular rings, and the bottom frame and the;

the upper surface of the top cover is a regular octagon, 8 trapezoidal pieces are fixedly connected to the periphery of the top cover, the 8 trapezoidal pieces are sequentially connected to form a space octagon, 8 clamping columns with the same length are arranged on the periphery of the lower surface of the top cover, adjacent clamping columns and the top cover form U-shaped bayonets with downward openings, four U-shaped bayonets are clamped on the triangular-like block of the top frame, and the other four U-shaped bayonets are clamped on the U-shaped block of the bottom frame; the depths of the adjacent U-shaped bayonets are different;

the inner tooth side of the U-shaped bayonet is provided with a frosting surface, four U-shaped bayonets are in interference clamping connection with the triangular block of the top frame, and the other four U-shaped bayonets are in interference clamping connection with the U-shaped block of the bottom frame.

Preferably, the nut of the screw is provided with a cross-shaped self-tapping slot.

A three-order magic cube adopts the lifting middle cover for the three-order magic cube to be arranged at the center of the outer surface of the three-order magic cube, and also comprises 8 corner blocks positioned at the vertex angle of the magic cube and 12 corner blocks positioned at the edge position of the outer surface of the magic cube;

the angle block specifically comprises a bottom support, a hexagonal frame, a triangular frame, six-claw connecting arms and three first rhombic pieces, wherein the bottom support comprises a funnel-shaped frame with a downward opening and an inner hexagonal prism connected to the center of the upper surface of the funnel-shaped frame, a screw hole is formed in one end, away from the funnel-shaped frame, of the inner hexagonal prism, T-shaped clamping grooves are formed in three edges of the hexagonal frame, T-shaped magnet blocks are arranged in the T-shaped clamping grooves, triangular notches are formed in the other three edges of the hexagonal frame, and a hexagonal clamping frame structure is formed inside the hexagonal frame; an outer hexagonal prism is arranged inside the triangular frame, the outer wall of the upper end of the outer hexagonal prism is fixedly connected with the central position of the edge of the triangular frame through three symmetrical connecting blocks, the lower end of the outer hexagonal prism is sleeved inside the hexagonal frame, the lower port of the outer hexagonal prism is sleeved on the outer wall of the inner hexagonal prism, and the angular position of the triangular frame is in a downward butterfly sheet shape and is clamped on a triangular notch of the hexagonal frame; the center of the six-claw connecting arm is a hexagonal hollow tube, the three walls of the hexagonal hollow tube are connected with wedge blocks, the other three walls of the hexagonal hollow tube are fixedly connected with a magnet mounting block through a connecting block, a T-shaped clamping groove and a T-shaped magnet block clamped inside the T-shaped clamping groove are also arranged at the bottom end of the magnet mounting block, the bottom end of the hexagonal hollow tube is sleeved inside an outer hexagonal prism, a screw hole is also arranged inside the hexagonal hollow tube, and the hexagonal hollow tube, the outer hexagonal prism, a triangular frame and the inner hexagonal prism are mutually fastened and connected through fastening screws;

the edge block consists of a base, a quadrilateral frame and two second diamond-shaped pieces, the bottom of the base is an arc-shaped piece which is concave upwards, the bottom surface of the arc-shaped piece of the base is fixedly connected with a downward arc-shaped strip, the arc-shaped strip is connected with a straight strip in a cross way, the bottom surface of the base, the arc-shaped strip and the straight strip form a clamping groove structure, the funnel-shaped frame of the bottom support of the corner block is movably clamped in the clamping groove structure and is contacted with the edge strip of the bottom frame of the middle block during assembly, and the edge block, the corner block and the middle block are assembled together;

the top surface of the base is provided with a T-shaped table through a four-side lug frame, the four-side lug is formed by vertically splicing 4 triangular plates, the inner wall of the quadrilateral frame is provided with a rectangular notch correspondingly clamped with the four-side lug, and the outer wall of the quadrilateral frame is provided with four T-shaped clamping grooves which are symmetrically distributed and T-shaped magnet blocks which are clamped inside the four T-shaped clamping grooves; the outer surface of each second diamond piece is also a concave-convex surface spliced in a polygonal manner, a non-magnetic T-shaped groove in interference fit and clamping with the T-shaped table is arranged in the middle of the inner surface of each second diamond piece, a T-shaped clamping groove is respectively formed in each of two sides of each non-magnetic T-shaped groove, a T-shaped magnet block is clamped in the T-shaped clamping grooves of the two second diamond pieces together, a pin column is arranged at one angular position of the inner surface of each second diamond piece, a pin sleeve sleeved with the pin column is arranged at the other angular position of the inner surface of each second diamond piece, and the two second diamond pieces are fastened together through the T-shaped table, the two T-shaped magnets and.

Preferably, the clamping groove on the inner surface of the first diamond-shaped sheet is in interference clamping fit with the wedge-shaped block.

Preferably, any T-shaped magnet block is opposite in magnetism to any rectangular magnet block.

Preferably, the bottom surface of the base, the arc-shaped strips and the contact surfaces of the straight strips and the funnel-shaped frame activity of the bottom support and the edge strips of the bottom frame are all subjected to smoothing treatment.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model provides a magic cube, it is just convenient to dismantle equipment and maintenance mean square, and the surface touch is better, and adopts the concatenation mode in big clearance between each connecting piece, and the colour of one other face of part can be seen through the clearance to the concatenation in this kind of big clearance to promote observation speed, this kind of design is not conform to the rule of certain association, but can promote the speed of observing and restoring, is convenient for novice explain study and the needs of high-hand challenge limit.

2. The utility model adopts the way of magnetic attraction and fastener connection, and simultaneously, under the action of the spring of the middle block, the magic cube has higher smoothness during playing, especially has elastic energy storage and better hand feeling, and forms a soft elastic shell; through the elastic shell, the touch sense has certain buffering and new use experience.

3. The utility model can adjust the relative height of the top cover and the top frame through the U-shaped bayonets with different depths, so that the top cover and the top frame are coplanar (as shown in the left drawing of figure 3) or protrude above the top frame (as shown in the right drawing of figure 3), thereby forming the lifting function of the top cover; the relative height of the lifting middle cover, the corner blocks and the edge blocks can be adjusted through screws, the relative height of the top cover, the corner blocks and the edge blocks around the top cover can be adjusted, an inner concave surface and an outer convex surface are formed, accordingly, the shape change of the three-order magic cube is improved, the lifting function of the middle cover is more complete, the variability and the playability of the magic cube are more abundant, and the further popularization of the movement of the magic cube is facilitated.

Drawings

Fig. 1 is an assembly fitting diagram of a lifting middle cover for a three-order magic cube provided by the utility model;

fig. 2 is a depth comparison diagram of adjacent U-shaped bayonets of the top cover of the lifting middle cover for the three-order magic cube provided by the utility model;

fig. 3 is a schematic view of the lifting principle of the top cover of the lifting middle cover for the three-order magic cube according to the present invention (the left view is a view of the lower position of the top cover, and the right view is a view of the higher position of the top cover);

fig. 4 is an assembly fitting diagram of a corner block of the third-order magic cube provided by the utility model;

fig. 5 is an assembly fitting diagram of a prism block of the third-order magic cube provided by the utility model;

fig. 6 is a partial assembly structure diagram of a third-order magic cube according to the present invention;

fig. 7 is an external view of the assembled magic cube of the present invention.

In the figure: the square magnet support comprises a middle block 1, a bottom frame 101, a top frame 102, a top cover 103, a rectangular magnet block 104, a corner block 2, a bottom support 201, a hexagonal frame 202, a triangular frame 203, a six-claw connecting arm 204, a first diamond-shaped piece 205, an inner hexagonal prism 206, a wedge-shaped block 207, a prism block 3, a base 301, a quadrilateral frame 302, a second diamond-shaped piece 303, a T-shaped table 304, a pin 305, a support frame 4, a cylinder 401, a screw 402, a spring 403 and a T-shaped magnet block 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a lifting middle cover for a three-order magic cube is specifically composed of 6 middle blocks 1 located at the center of the outer surface of the magic cube, 8 corner blocks 2 located at the vertex angle of the magic cube and 12 edge blocks 3 located at the edge position of the outer surface of the magic cube, wherein each middle block 1 is formed by erecting an internal support frame 4, each support frame 4 comprises 6 six cylinders 401 which are perpendicular to each other along a three-dimensional coordinate axis, one end surface of each of the 6 cylinders 401 intersects with one position, a screw hole is formed in the center of the other end surface of any cylinder 401, a screw 402 is sleeved inside the screw hole of each cylinder 401, a nut is arranged at one end, far away from each cylinder 401, of each screw 402, and a spring 403 is sleeved on the rod; the middle block 1 comprises a bottom frame 101, a top frame 102 and a top cover 103, wherein the peripheries of the bottom frame 101 and the top frame 102 are both provided with spatial octagonal edgings, an octagonal cylindrical shell is arranged inside the bottom frame 101 and is fixedly connected with the edgings of the bottom frame 101 through four symmetrically distributed U-shaped blocks, openings of the U-shaped blocks face upwards and are clamped with rectangular magnet blocks 104, a positioning ring is arranged inside the top frame 102, the upper surface of the positioning ring is fixedly connected with the edgings of the top frame 102 through four symmetrically distributed triangle-like blocks, the positioning ring is sleeved in the octagonal cylindrical shell of the bottom frame 101, the lower surface of the edgings of the top frame 102 is provided with four symmetrically arranged supporting arc sheets which are in contact with the upper surface of the edgings of the bottom frame 101, the triangle-like blocks cover the openings of the U-shaped blocks, and screws 402 penetrate through the positioning ring, the spring 403 is positioned above the positioning ring, and the bottom frame 101 and the top frame 102 are movably sleeved on the screw 402; the upper surface of top cap 103 is regular octagon, and top cap 103 all around the rigid coupling by 8 trapezoidal pieces, 8 trapezoidal pieces connect gradually and enclose into the space octagon, and top cap 103 lower surface is equipped with 8 card posts that length equals all around, and adjacent card post forms the U-shaped bayonet socket that the opening faces down with top cap 103, and wherein four U-shaped bayonet sockets joint are on the class triangular block of top frame 102, and four other U-shaped bayonet sockets joint are on the U-shaped block of underframe 101.

Referring to fig. 1, the nut of the screw 402 is provided with a cross self-tapping groove, the wall of the screw 402 forms a smooth fixed shaft, so that the middle block 1 can rotate around the screw 402, and the bolt inside the corner block 2 is also provided with a self-tapping groove, so that the magic cube can be detached, installed, maintained and cleaned conveniently.

Referring to fig. 3, when the deeper U-shaped bayonet is buckled on the U-shaped block of the bottom frame 101, the top cover 103 protrudes above the top frame (as shown in the right drawing of fig. 3), and the height of the middle cover is higher than the plane, so that when the magic cube is welcomed, the fingers can be positioned more clearly, and the corresponding positions of the fingers can be known as long as the fingers touch the raised middle cover, so that the position relationship between the hand and the magic cube can be better known, a more reasonable state can be adjusted, and the reduction method can be better completed; when the shallow U-shaped bayonet is buckled on the U-shaped block of the bottom frame 101, the highest positions of the top cover and the top frame are on the same plane (as shown in the left drawing of fig. 3), which is equivalent to being flat, and the positions of fingers touching the magic cube can be slightly different and are not clear, so that the execution of the manipulation is influenced; now, with a raised middle cap, the hand can be adjusted very quickly. Just like two keys of an F key and a J key on a computer keyboard are provided with a small bulge, the positions of hands can be known by touching the two bulges with index fingers of left and right hands without looking at the keyboard. And this is the function of the middle cover protrusion.

Referring to fig. 4, the corner block 2 specifically comprises a bottom support 201, a hexagonal frame 202, a triangular frame 203, a six-claw connecting arm 204 and three first rhombic plates 205, wherein the bottom support 201 comprises a funnel-shaped frame with a downward opening and an inner hexagonal prism 206 connected to the center of the upper surface of the funnel-shaped frame, a screw hole is formed in one end, away from the funnel-shaped frame, of the inner hexagonal prism 206, a T-shaped clamping groove is formed in three sides of the hexagonal frame 202, a T-shaped magnet block 5 is arranged in the T-shaped clamping groove, triangular notches are formed in the other three sides of the hexagonal frame 202, and a hexagonal clamping frame structure is formed inside the; an outer hexagonal prism is arranged inside the triangular frame 203, the outer wall of the upper end of the outer hexagonal prism is fixedly connected with the central position of the side of the triangular frame 203 through three symmetrical connecting blocks, the lower end of the outer hexagonal prism is sleeved inside the hexagonal frame 202, the lower port of the outer hexagonal prism is sleeved on the outer wall of the inner hexagonal prism 206, and the angular position of the triangular frame 203 is in a downward butterfly sheet shape and is clamped on a triangular notch of the hexagonal frame 202; the center of the six-claw connecting arm 204 is a hexagonal hollow tube, the three walls of the hexagonal hollow tube are connected with a wedge-shaped block 207, the other three walls of the hexagonal hollow tube are fixedly connected with a magnet mounting block through a connecting block, a T-shaped clamping groove and a T-shaped magnet block 5 clamped inside the T-shaped clamping groove are also arranged at the bottom end of the magnet mounting block, the bottom end of the hexagonal hollow tube is sleeved inside an outer hexagonal prism, a screw hole is also arranged inside the hexagonal hollow tube, and the hexagonal hollow tube, the outer hexagonal prism, the triangular frame 203 and the inner hexagonal prism 206 are mutually fastened and connected through fastening;

referring to fig. 5, the edge block 3 is composed of a base 301, a quadrilateral frame 302 and two second diamond-shaped sheets 303, the bottom of the base 301 is an arc-shaped sheet which is concave upwards, a downward arc-shaped strip is fixedly connected to the bottom surface of the arc-shaped sheet of the base 301, the arc-shaped strip is connected with a straight strip in a cross mode, the bottom surface of the base 301, the arc-shaped strip and the straight strip form a clamping groove structure, the funnel-shaped frame of the bottom support 201 of the corner block 2 is movably clamped in the clamping groove structure during assembling and is in contact with the edge strip of the bottom frame 101 of the middle block 1, and the edge block 3, the corner block 2 and the middle block; the top surface of the base 301 is provided with a T-shaped table 304 through a four-side lug frame, the four-side lug is formed by vertically splicing 4 triangular plates, the inner wall of the quadrilateral frame 302 is provided with a rectangular notch correspondingly clamped with the four-side lug, and the outer wall of the quadrilateral frame 302 is provided with four T-shaped clamping grooves which are symmetrically distributed and T-shaped magnet blocks 5 clamped inside the four T-shaped clamping grooves; the outer surface of the second diamond-shaped piece 303 is also a concave-convex surface spliced in a polygonal shape, a non-magnetic T-shaped groove which is in interference fit and clamped connection with the T-shaped table 304 is arranged in the middle of the inner surface of the second diamond-shaped piece 303, two T-shaped clamping grooves are respectively formed in two sides of the non-magnetic T-shaped groove, a T-shaped magnet block 5 is clamped in the T-shaped clamping grooves of the two second diamond-shaped pieces 303 together, a pin 305 is arranged at one angular position of the inner surface of the second diamond-shaped piece 303, a pin sleeve sleeved with the pin 305 is arranged at the other angular position of the inner surface of the second diamond-shaped piece 303, and the two second diamond-shaped pieces 303 are fastened together through the T-shaped.

Referring to fig. 6, the clamping groove on the inner surface of the first diamond-shaped sheet 205 is in interference clamping fit with the wedge-shaped block 207, so that the structural stability of the corner block 2 is ensured, and meanwhile, a small interference magnitude needs to be ensured, so that the corner block also has certain detachable maintenance performance.

Referring to fig. 1 and 4-5, any one of the T-shaped magnet blocks 5 is opposite to any one of the rectangular magnet blocks 104 in magnetism, so that the corner blocks 2 and the edge blocks 3 can be conveniently adsorbed around the middle block 1, 9 blocks on any side can be combined together when the toy is played, and the magnet blocks rotate around the screw 402 of the cylinder 401 together, so that the magnet blocks are not separated, and the adjacent corner blocks 2, edge blocks 3 and middle blocks 1 can be ensured to be separated by magnetic connection.

Referring to fig. 6, the bottom surface of the base 301, the contact surfaces of the arc-shaped strip and the straight strip with the funnel-shaped frame of the bottom bracket 201 and the edge strip of the bottom frame 101 are all smoothed. As shown in fig. 4, the bottom support 201 is inserted into the smooth slot structure formed by the base 301, so as to ensure the stable connectivity of the whole magic cube, i.e. when 9 blocks on one surface are connected together, the blocks cannot be separated and can move in the same plane; on the other hand, along with the rotation of the corner block 2 on the other side, the bottom support 201 can rotate out from the adjacent smooth slot structure, and the rotation fluency of the magic cube is not affected.

When the magic cube is assembled, the middle block 1 is firstly installed on the support frame 4 through the screw 402, and the spring 403 is positioned between the top frame 102 and the top cover 103; the angle blocks 2 and the edge blocks 3 are installed independently in sequence, then the bottom surface of the base 301, the arc-shaped strips and the straight strips are attracted with the bottom frame 101 in a magnetic mode together with the funnel-shaped frame of the bottom support 201, finally the 6 middle blocks 1, 8 angle blocks 2 and 12 edge blocks 3 form a vertical body, and smooth contact is achieved between the blocks through surface rotation, six cubic three-order magic cubes with two vertical sides are formed, and the cubic magic cube is shown in figure 5.

Referring to fig. 7, the utility model provides a magic cube, it is just to dismantle equipment and maintenance square, and the surperficial sense of touch is better, and adopts the concatenation mode in big clearance between each connecting piece, and the colour of one other face of part can be seen through the clearance to the concatenation in this kind of big clearance. Thereby increasing the observation speed. Although the design does not conform to the rules of a certain association, the observation and reduction speed can be improved, and the requirements of learning and high-hand challenge limits can be conveniently explained by novices. More importantly, the magic cube is higher in smoothness during playing through the mode of magnetic attraction and clamping piece connection, and particularly has elastic energy storage, better hand feeling and soft elastic shell formation under the action of the spring 403 of the middle block 1; through the elastic shell, the touch sense has certain buffering and new use experience.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (6)

1. A lifting middle cover for a three-order magic cube is erected by an internal support frame (4), and is characterized in that the support frame (4) comprises six cylinders (401) which are vertical to each other along a three-dimensional coordinate axis, one end faces of the 6 cylinders (401) are intersected at one position, a screw hole is formed in the center of the other end face of any cylinder (401), a screw (402) is sleeved inside the screw hole of the cylinder (401), a nut is arranged at one end, far away from the cylinder (401), of the screw (402), and a spring (403) is sleeved on the rod wall of the screw (402);

the lifting middle cover comprises a bottom frame (101), a top frame (102) and a top cover (103), wherein the peripheries of the bottom frame (101) and the top frame (102) are both side strips which are in a space octagon shape, an octagon cylindrical shell is arranged in the bottom frame (101), the octagon cylindrical shell is fixedly connected with the side strips of the bottom frame (101) through four symmetrically distributed U-shaped blocks, the U-shaped blocks are upward in opening and are connected with rectangular magnet blocks (104) in a clamping manner, a positioning circular ring is arranged in the top frame (102), the upper surface of the positioning circular ring is fixedly connected with the side strips of the top frame (102) through four symmetrically distributed triangle-like blocks, the positioning circular ring is sleeved in the octagon cylindrical shell of the bottom frame (101), four symmetrically arranged supporting arc-shaped pieces are arranged on the lower surface of the side strips of the top frame (102), the supporting arc-shaped pieces are in contact with the upper surface of the side strips of the bottom frame (101), and the triangle-like blocks cover the, the screw (402) penetrates through the positioning circular ring, the spring (403) is positioned above the positioning circular ring, and the bottom frame (101) and the top frame (102) are movably sleeved on the screw (402);

the upper surface of the top cover (103) is a regular octagon, 8 trapezoidal pieces are fixedly connected to the periphery of the top cover (103), the 8 trapezoidal pieces are sequentially connected to form a space octagon, 8 clamping columns with the same length are arranged on the periphery of the lower surface of the top cover (103), adjacent clamping columns and the top cover (103) form U-shaped bayonets with downward openings, four U-shaped bayonets are clamped on a triangular-like block of the top frame (102), and the other four U-shaped bayonets are clamped on a U-shaped block of the bottom frame (101); the depths of the adjacent U-shaped bayonets are different;

the inner tooth side of the U-shaped bayonet is provided with a frosting surface, four of the U-shaped bayonets are in interference clamping connection with the triangular block of the top frame (102), and the other four of the U-shaped bayonets are in interference clamping connection with the U-shaped block of the bottom frame (101).

2. A lifting cover for a third-order magic cube, as claimed in claim 1, wherein the screw (402) has a cross-shaped self-tapping slot.

3. A magic cube, adopt a magic cube of claim 1 to use the lift middle cover to set up in the outer surface central position of the magic cube, characterized by that, also include 8 corner cubes (2) located in vertex angle position of the magic cube and 12 arris pieces (3) located in outer surface edge position of the magic cube make up;

the corner block (2) is specifically composed of a bottom support (201), a hexagonal frame (202), a triangular frame (203), six-claw connecting arms (204) and three first diamond-shaped sheets (205), the bottom support (201) is composed of a funnel-shaped frame with a downward opening and an inner hexagonal prism (206) connected to the center of the upper surface of the funnel-shaped frame, one end, away from the funnel-shaped frame, of the inner hexagonal prism (206) is provided with a screw hole, three sides of the hexagonal frame (202) are provided with T-shaped clamping grooves, T-shaped magnet blocks (5) are arranged in the T-shaped clamping grooves, the other three sides of the hexagonal frame (202) are provided with triangular notches, and a hexagonal clamping frame structure is formed inside the hexagonal frame (202); an outer hexagonal prism is arranged inside the triangular frame (203), the outer wall of the upper end of the outer hexagonal prism is fixedly connected with the center position of the side of the triangular frame (203) through three symmetrical connecting blocks, the lower end of the outer hexagonal prism is sleeved inside the hexagonal frame (202), the lower port of the outer hexagonal prism is sleeved on the outer wall of the inner hexagonal prism (206), and the angular position of the triangular frame (203) is in a downward butterfly sheet shape and is clamped on a triangular notch of the hexagonal frame (202); the center of the six-claw connecting arm (204) is a hexagonal hollow tube, a wedge-shaped block (207) is connected to three walls of the hexagonal hollow tube, a magnet mounting block is fixedly connected to the other three walls of the hexagonal hollow tube through a connecting block, a T-shaped clamping groove and a T-shaped magnet block (5) clamped inside the T-shaped clamping groove are also arranged at the bottom end of the magnet mounting block, the bottom end of the hexagonal hollow tube is sleeved inside an outer hexagonal prism, a screw hole is also arranged inside the hexagonal hollow tube, and the hexagonal hollow tube, the outer hexagonal prism, a triangular frame (203) and the inner hexagonal prism (206) are mutually fastened and connected through fastening screws;

the edge block (3) comprises a base (301), a quadrilateral frame (302) and two second rhombic pieces (303), the bottom of the base (301) is in an inward concave upward arc-shaped sheet shape, the bottom surface of the arc-shaped piece of the base (301) is fixedly connected with a downward arc-shaped strip, the arc-shaped strip is connected with a straight strip in a cross mode, the bottom surface of the base (301), the arc-shaped strip and the straight strip form a clamping groove structure, during assembly, a funnel-shaped frame of a bottom support (201) of the edge block (2) is movably clamped in the clamping groove structure and is in contact with an edge strip of a bottom frame (101) of the middle block (1), and the edge block (3), the edge block (2) and the middle block (1) are assembled together;

the top surface of the base (301) is provided with a T-shaped table (304) through a four-side lug frame, the four-side lug is formed by vertically splicing 4 triangular plates, the inner wall of the quadrilateral frame (302) is provided with a rectangular notch correspondingly clamped with the four-side lug, and the outer wall of the quadrilateral frame (302) is provided with four T-shaped clamping grooves which are symmetrically distributed and T-shaped magnet blocks (5) clamped inside the four-side clamping grooves; the surface of second rhombus piece (303) also is the concave-convex face of polygon concatenation, the middle part of second rhombus piece (303) internal surface is equipped with the non-magnetism nature T type groove with T type platform (304) interference fit joint, the both sides in non-magnetism nature T type groove are equipped with a T type draw-in groove respectively, two joint has a T shape magnet piece (5) in the T type draw-in groove of second rhombus piece (303), an angular position of second rhombus piece (303) internal surface is equipped with round pin post (305), another angular position of second rhombus piece (303) internal surface is equipped with the round pin cover that cup joints with round pin post (305), two second rhombus piece (303) are in the same place through T type platform (304), two T shape magnets and two round pin posts (305) fastening.

4. A third order cube according to claim 3 wherein the engagement recess in the inner surface of the first diamond-shaped segment (205) is an interference snap fit with the wedge-shaped block (207).

5. A puzzle cube according to claim 3, wherein any one of the T-shaped magnet pieces (5) is opposite in polarity to any one of the rectangular magnet pieces (104).

6. A magic cube according to claim 3, wherein the bottom surface of the base (301), the curved and straight strips, and the funnel-shaped frame of the bottom support (201) and the contact surface of the side strips of the bottom frame (101) are smoothed.

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