Magic cube

Abstract

The utility model discloses a Rubik's cube which comprises a central mechanism, angle block assemblies and edge block assemblies. The center mechanism comprises a center rotating body, a center block assembly arranged at the end of the center rotating body, a connecting piece used for connecting the center rotating body and the center block assembly, a side connecting block connected with the center block assembly in a tight fit mode and a middle edge block connected with the side connecting block in a tight fit mode. The center rotating body, the center block assembly, the side connecting blocks and the middle edge blocks are combined to form a spherical structure, the center rotating body is provided with six center connecting parts and eight center diagonal parts, the center block assembly is connected with the center connecting parts through the connecting pieces, diagonal magnetic pieces are arranged at the ends of the center diagonal parts, and the corner block assembly comprises a corner block body. The end, extending to the center rotating body, of each corner block body is provided with a first corner block magnetic piece, the first corner block magnetic pieces attract the diagonal magnetic pieces, each edge block assembly comprises an edge block body, and each edge block body is connected with a middle edge block. And a large-angle automatic homing function and a positioning function of the magic cube can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of Rubik's cubes, in particular to a fourth-order Rubik's cube. Background Art

[0002] At present, the traditional fourth-order Rubik's cube is a regular hexahedron Rubik's cube made of elastic hard plastic. The core is a shaft and it consists of 56 blocks. Among them, there are 24 center blocks with only one side colored. There are 8 corner blocks that can rotate and 24 edge blocks that can also rotate. When the product is sold, the arrangement of the blocks makes each side of the cube have the same color. When a certain side of the regular hexahedron is translated and rotated, the single color of its adjacent sides is destroyed, and a new pattern cube is formed. When rotated again, it changes again, forming a cube with each side composed of blocks of different colors. The gameplay is to quickly restore the scrambled cube to a single color on all six sides by rotating.

[0003] Since its invention, the Rubik's cube has been popular all over the world for a while because it has a strong educational function for humans. The Rubik's cube is easy to understand and highly flexible with thousands of changes. To play it well, the player must be able to concentrate, think continuously, and be patient. In a sense, the Rubik's cube has become a special toy for intellectual development and a toy for assessing the intelligence level and maturity of players, thus attracting batch after batch of players. In Rubik's cube competitions, relatively complex Rubik's cubes are usually used as competition props. During the competition, the contestants need to rotate quickly to complete the reordering of the Rubik's cube in the shortest time. For traditional Rubik's cubes, the rotation depends on the precise rotation of the player, and each rotation of the Rubik's cube needs to be 90 degrees so that the Rubik's cube is not easily stuck. For Rubik's cubes with magnetic positioning blocks, there will be magnetic suction to make the Rubik's cube be magnetically adsorbed at the 90-degree state, with more precise positioning. However, the existing magnetic Rubik's cubes have the following defects:

[0004] 1. For some existing magnetic Rubik's cubes, the magnetic attraction structure of the Rubik's cube product is top surface positioning. Most of them have a positioning magnet in the middle of each corner block and edge block. The magnetic force of the positioning magnet is relatively large, and the starting resistance of the Rubik's cube from static to rotating is relatively large, which is not conducive to quickly restoring the Rubik's cube.

[0005] 2. For some existing magnetic Rubik's cubes, they are equipped with a magnetic positioning device, which is usually a magnet. The whole Rubik's cube needs to be disassembled, and the magnet is pasted on the inner wall of the magnet groove of the block through chemical substances such as glue. Using glue is not only not environmentally friendly, but also has poor assembly accuracy, and it is not easy to replace the magnet, making it difficult to change the magnetic force of the block, and thus difficult to adjust the magnetic force of the layer where the block is located. Summary of the Utility Model

[0006] Aiming at the defects existing in the above prior art, the utility model provides a fourth-order Rubik's cube to solve the defects mentioned in the background.

[0007] The present utility model is realized by the following technical solutions:

[0008] A fourth-order Rubik's Cube includes a central mechanism, corner block components, and edge block components. The edge block components and the corner block components are rotationally connected through the central mechanism. The corner block components and the adjacent edge block components attract each other, and two adjacent edge block components attract each other pairwise. The central mechanism includes a central rotating body, central block components arranged at the ends of the central rotating body, connecting pieces for connecting the central rotating body and the central block components, side connecting blocks closely attached to the central block components, and middle edge blocks closely attached to the side connecting blocks. The central rotating body, central block components, side connecting blocks, and middle edge blocks are combined into a spherical structure. The central rotating body has six central connecting parts and eight central diagonal parts. The central block components are connected to the central connecting parts through the connecting pieces. Diagonal magnetic parts are provided at the ends of the central diagonal parts. The corner block components include corner block bodies. The corner block bodies extend to the ends of the central rotating body and are provided with first corner block magnetic parts. The first corner block magnetic parts attract the diagonal magnetic parts. The edge block components include edge block bodies. The edge block bodies are connected to the middle edge blocks.

[0009] Further, a receiving groove for receiving the diagonal magnetic parts is provided at the end of the central diagonal part.

[0010] Further, the central block components include central shafts. Central blocks are provided at the ends of the central shafts. The side connecting blocks abut against the concave surfaces of the central blocks. Central covers are provided at the ends of two adjacent side connecting blocks. The central covers have support parts for supporting the side connecting blocks. The central shafts are provided with connecting through holes. The connecting pieces pass through the connecting through holes and are then connected to the central connecting parts.

[0011] Further, the connecting pieces are threadedly connected to the central connecting parts.

[0012] Further, the central block components further include springs and gaskets. Annular steps are provided inside the central shafts. The gaskets are arranged on the annular steps. The springs are sleeved outside the connecting pieces and one end of the springs abuts against the gaskets. The other ends of the springs abut against the ends of the connecting pieces.

[0013] Further, the central shafts include integrally structured connecting columns and connecting blocks. One end of the connecting column is connected to the connecting block. The other end of the connecting column is butted against the central connecting part. The central blocks have central grooves and central through holes. The central through holes are located inside the central grooves. The connecting columns of the central shafts pass through the central through holes. The connecting blocks abut against the central grooves. Protrusions are provided on the upper end surfaces of the connecting blocks.

[0014] Furthermore, the side connecting block and the middle edge block are connected in a snap-fit manner.

[0015] Furthermore, the side connecting block has a first sheet part and a first block part, the middle edge block has a second sheet part and a second block part, the first sheet part, the second sheet part and the center block can be located within the same spherical surface, the first block part is provided with a card slot, the second block part is provided with a card part that cooperates with the card slot, and the card part can be snap-fitted into the card slot.

[0016] Furthermore, the corner block assembly further includes a corner cover sheet, a corner block magnetic storage bin and a second corner block magnetic member. The three side walls of the corner block body are all provided with the corner block magnetic storage bins, and the second corner block magnetic members are all installed inside the three corner block magnetic storage bins. The three second corner block magnetic members attract the adjacent edge block assemblies.

[0017] Furthermore, the edge block assembly further includes an edge cover sheet, an edge block magnetic storage bin and an edge block magnetic member. The two side walls of the edge block body are all provided with the edge block magnetic storage bins, and the edge block magnetic members are all installed inside the two edge block magnetic storage bins. The edge block magnetic members attract the adjacent second corner block magnetic members.

[0018] Compared with the prior art, the beneficial effects of the present utility model at least include:

[0019] By the diagonal magnetic member attracting the first corner block magnetic member, the magnetic positioning function is realized; the diagonal magnetic member of the central rotating body is placed as close as possible to the position of the first corner block magnetic member at the end of the corner block body, so that the magnetic attraction position moves downward, greatly increasing the torque of rotation and significantly reducing the rotational thrust; compared with the traditional magnetic cube method where the magnetic force position is on the bottom surface, during the high-speed rotation process, the first corner block magnetic member at the end of the corner block body attracts the diagonal magnetic member of the central rotating body. In the case of attraction, it assists the cube to automatically return to its position. Therefore, when the internal rotation angle is not large, it will be attracted by the magnetic force of the other diagonal magnetic member of the central rotating body, reducing the starting thrust of the cube from static to rotation, thereby realizing the large-angle automatic return function and positioning function of the cube. By the side connecting block closely fitting with the central block assembly and the middle edge block closely fitting with the two side connecting blocks, during the high-speed rotation process of the cube, the side connecting block and the middle edge block can rotate smoothly. By providing the central rotating body and the cooperation of the central block assembly provided at the end of the central rotating body, the present utility model has six different positioning systems. Through the above structural design, its magnetic force is constant, the distribution of the central weight is more uniform, the rotation force is lighter, making the entire cube run more smoothly and improving the user experience. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a fourth-order cube according to an embodiment of the present utility model;

[0021] Figure 2 It is a schematic diagram of the internal structure of a fourth-order Rubik's Cube according to an embodiment of the present utility model;

[0022] Figure 3 It is a sectional view of a fourth-order Rubik's Cube according to an embodiment of the present utility model;

[0023] Figure 4 It is an assembly schematic diagram of the central rotating body and the corner block assembly according to an embodiment of the present utility model;

[0024] Figure 5 It is an assembly schematic diagram of the central rotating body and the central axis according to an embodiment of the present utility model;

[0025] Figure 6 For Figure 5 A sectional view of the structure;

[0026] Figure 7 It is a schematic diagram of the structure of the central rotating body according to an embodiment of the present utility model;

[0027] Figure 8 It is a schematic diagram of the structure of the side connecting block according to an embodiment of the present utility model;

[0028] Figure 9 It is a schematic diagram of the structure of the middle edge block according to an embodiment of the present utility model;

[0029] Figure 10 It is an assembly schematic diagram of the middle edge block and the side connecting block according to an embodiment of the present utility model;

[0030] Figure 11 It is a schematic diagram of the corner block assembly according to an embodiment of the present utility model;

[0031] Figure 12 It is a sectional view of the corner block magnetic force bin according to an embodiment of the present utility model;

[0032] Figure 13 It is a schematic diagram of the edge block assembly according to an embodiment of the present utility model;

[0033] Figure 14 It is an assembly schematic diagram of the edge block assembly and the middle edge block according to an embodiment of the present utility model;

[0034] Figure 15 It is a schematic diagram of the attraction between the corner block magnetic force bin and the edge block magnetic force bin according to an embodiment of the present utility model;

[0035] Figure 16 It is an assembly schematic diagram of the side connecting block and the center cover according to an embodiment of the present utility model;

[0036] In the figure: 10, central swivel body; 11, central connecting part; 110, internal threaded hole; 12, central diagonal part; 120, receiving groove; 13, diagonal magnetic part; 21, central shaft; 210, connecting column; 211, connecting block; 212, annular step; 213, protrusion; 214, connecting through hole; 22, central block; 23, central cover; 24, spring; 25, gasket; 30, side connecting block; 31, first sheet part; 32, first block part; 33, clamping groove; 40, middle edge block; 41, second sheet part; 42, second block part; 43, clamping part; 50, corner block assembly; 51, corner block main body; 52, corner cover sheet; 53, corner block magnetic bin; 54, first corner block magnetic part; 55, second corner block magnetic part; 60, edge block assembly; 61, edge block main body; 62, edge cover sheet; 63, edge block magnetic bin; 64, edge block magnetic part; 70, connecting piece. Detailed implementation manners

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this utility model will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote the same or similar structures, and thus their repeated description will be omitted.

[0038] The words expressing positions and directions described in this utility model are all illustrated by taking the accompanying drawings as examples, but can be changed as needed, and all the changes made are included in the protection scope of this utility model.

[0039] As Figures 1-16As shown in the figure, a four - order Rubik's Cube provided by the utility model includes a central mechanism, a corner block assembly 50 and an edge block assembly 60. The edge block assembly 60 and the corner block assembly 50 are rotationally connected through the central mechanism. The corner block assembly 50 and the adjacent edge block assembly 60 attract each other, and two adjacent edge block assemblies 60 attract each other pairwise. The central mechanism includes a central rotating body 10, a central block assembly arranged at the end of the central rotating body 10, a connecting piece 70 for connecting the central rotating body 10 and the central block assembly, a side connecting block 30 closely attached to the central block assembly, and a middle edge block 40 closely attached to the side connecting block 30. The central rotating body 10, the central block assembly, the side connecting block 30 and the middle edge block 40 are combined into a spherical structure. The central rotating body 10 has six central connecting parts 11 and eight central diagonal parts 12. The central block assembly is connected to the central connecting part 11 through the connecting piece 70. Diagonal magnetic parts 13 are arranged at the ends of the central diagonal parts 12. The corner block assembly 50 includes a corner block main body 51. The corner block main body 51 extends to the end of the central rotating body 10 and is provided with a first corner - block magnetic part 54. The first corner - block magnetic part 54 attracts the diagonal magnetic part 13. The edge block assembly 60 includes an edge block main body 61. The edge block main body 61 is connected to the middle edge block 40.

[0040] In this embodiment, the magnetic force positioning function is realized by the attraction between the diagonal magnetic part 13 and the first corner - block magnetic part 54. The diagonal magnetic part 13 of the central rotating body 10 is placed as close as possible to the position of the first corner - block magnetic part 54 at the end of the corner block main body 51, so that the magnetic attraction position moves downward, greatly increasing the torque of rotation and significantly reducing the rotation thrust. Compared with the traditional magnetic Rubik's Cube, in which the magnetic force position is on the bottom surface, during the high - speed rotation process, the first corner - block magnetic part 54 at the end of the corner block main body 51 attracts the diagonal magnetic part 13 of the central rotating body 10. In the case of attraction, it assists the Rubik's Cube to automatically return to its position. Therefore, when the internal rotation angle is not large, it will be attracted by the magnetic force of another diagonal magnetic part 13 of the central rotating body 10, reducing the starting thrust of the Rubik's Cube from rest to rotation, thus realizing the large - angle automatic return function and positioning function of the Rubik's Cube. By the close fit between the side connecting block 30 and the central block assembly, and the close fit between the middle edge block 40 and the two side connecting blocks 30, the side connecting block 30 and the middle edge block 40 can rotate smoothly during the high - speed rotation process of the Rubik's Cube. Through the cooperation of setting the central rotating body 10 and the central block assembly arranged at the end of the central rotating body 10, the utility model has six different positioning systems. Through the above - mentioned structural design, its magnetic force is constant, the distribution of the central weight is more uniform, the rotation force is lighter, making the whole Rubik's Cube run more smoothly and improving the user experience.

[0041] As a preferred embodiment, an accommodation groove 120 for accommodating the diagonal magnetic member 13 is provided at the end of the central diagonal part 12. Fixing the diagonal magnetic member 13 through the accommodation groove 120 is beneficial to reducing the internal structure, making the whole Rubik's Cube lighter, more stable and reliable.

[0042] As a preferred embodiment, the central block assembly includes a central shaft 21. At the end of each central shaft 21, a central block 22 is provided. The side connecting block 30 abuts against the concave surface of the central block 22. At the end of two adjacent side connecting blocks 30, a central cover 23 is provided. The central cover 23 has a supporting part for supporting the side connecting block 30. The central shaft 21 is provided with a connecting through hole 214. After the connecting member 70 passes through the connecting through hole 214, it is connected to the central connecting part 11.

[0043] As a preferred embodiment, the connecting member 70 is in threaded connection with the central connecting part 11. In this embodiment, the connecting member 70 is preferably a screw. The central connecting part 11 has an internal threaded hole 110 that is in threaded cooperation with the screw. By adopting the threaded connection method to connect the central shaft 21 and the central rotating body 10, the assembly is simple and it is also convenient to adjust the rotation feel of the Rubik's Cube.

[0044] As a preferred embodiment, the central block assembly further includes a spring 24 and a gasket 25. An annular step 212 is provided inside the central shaft 21. The gasket 25 is arranged on the annular step 212. The spring 24 is sleeved outside the connecting member 70 and one end thereof abuts against the gasket 25, and the other end of the spring 24 abuts against the end of the connecting member 70.

[0045] In this embodiment, the connecting member 70 locks and compresses the spring 24, and the spring 24 provides elastic force to the connecting member 70, and then presses the Rubik's Cube tightly to improve the rotation feel. The gasket 25 separates the spring 24 from the central shaft 21 to prevent the two from rubbing and increase the service life of the Rubik's Cube.

[0046] As a preferred embodiment, the central shaft 21 includes an integrally structured connecting column 210 and a connecting block 211. One end of the connecting column 210 is connected to the connecting block 211, and the other end of the connecting column 210 is butted against the central connecting part 11. The central block 22 has a central groove and a central through hole. The central through hole is located inside the central groove. The connecting column 210 of the central shaft 21 passes through the central through hole, and the connecting block 211 abuts in the central groove. A protrusion 213 is provided on the upper end surface of the connecting block 211.

[0047] In this embodiment, the central axis 21 is an integral structure composed of a connecting column 210 and a connecting block 211, which solves the problem of easy jamming during central rotation and makes the rotation more flexible and easier to operate. At the same time, by setting the protrusion 213, the problem of misalignment of the spherical structure is effectively solved.

[0048] As a preferred implementation manner, the side connecting block 30 and the middle edge block 40 are connected by a snap connection method.

[0049] Specifically, the side connecting block 30 has a first piece part 31 and a first block part 32, the middle edge block 40 has a second piece part 41 and a second block part 42, the first piece part 31, the second piece part 41 and the central block 22 can be located within the same spherical surface, a slot 33 is provided on the first block part 32, a clamping part 43 that cooperates with the slot 33 is provided on the second block part 42, and the clamping part 43 can be clamped in the slot 33.

[0050] In this embodiment, the side connecting block 30 and the middle edge block 40 are connected by a snap connection method through the slot 33 and the clamping part 43, making the inside of the Rubik's Cube compact and preventing the internal structure from being loose. At the same time, there is no need to rely on other structures for connection, reducing the internal structure and making the entire Rubik's Cube lighter, more stable and reliable.

[0051] As a preferred implementation manner, the corner block assembly 50 further includes a corner cover piece 52, a corner block magnetic force bin 53 and a second corner block magnetic part 55. The corner block magnetic force bins 53 are installed on the three side walls of the corner block body 51, the second corner block magnetic parts 55 are installed inside the three corner block magnetic force bins 53, and the three second corner block magnetic parts 55 attract the adjacent edge block assemblies 60.

[0052] In this embodiment, the corner block body 51 adopts three symmetric cylindrical structures, and a second corner block magnetic part 55 is used for auxiliary automatic alignment design on the three side surfaces; the second corner block magnetic part 55 is installed in the corner block magnetic force bin 53, which is convenient for replacing the magnetic part, so as to facilitate adjusting the magnetic force of the layer where it is located. Compared with the traditional method of pasting the magnetic part on the side wall of the corner block body 51 with chemical substances such as glue, the corner block magnetic force bin 53 of the present utility model fixes the magnetic part, which is not only environmentally friendly, but also has good assembly accuracy and is easy to replace the magnetic part.

[0053] As a preferred implementation manner, the edge block assembly 60 further includes an edge cover piece 62, an edge block magnetic force bin 63 and an edge block magnetic part 64. The edge block magnetic force bins 63 are installed on the two side walls of the edge block body 61, the edge block magnetic parts 64 are installed inside the two edge block magnetic force bins 63, and the edge block magnetic parts 64 attract the adjacent second corner block magnetic parts 55.

[0054] In this embodiment, the edge block assembly 60 adopts two cylindrical structures that are symmetric left and right. On both sides, one edge block magnetic part 64 is used to attract the second corner block magnetic part 55 on the side of the corner block assembly 50, and two edge block magnetic parts 64 are used to attract the edge block magnetic part 64 on the side of another edge block. This design structure reduces the internal structure, making the whole Rubik's Cube lighter, more stable and reliable.

[0055] Of course, by designing multiple slots for magnetic parts on the side of the corner block body 51 and also designing multiple slots for magnetic parts on the corresponding edge block body 61, and directly fixing the magnetic parts on the outer walls of the corner block body 51 or the edge block body 61, the same function can also be achieved.

[0056] In summary, the Rubik's Cube of the present utility model includes 8 corner block assemblies 50 and 24 edge block assemblies 60. Each assembly is assembled together through a central mechanism. The steps are as follows:

[0057] First: Assembly of the corner block assembly 50. First, the second corner block magnetic part 55 and the corner block magnetic force bin 53 are installed into the three slots of the corner block body 51; finally, the corner cover piece 52 is matched with the corner block body 51 to form the corner block assembly 50.

[0058] Second: Assembly of the edge block assembly 60. First, the edge block magnetic force bin 63 and the edge block magnetic part 64 are installed into the three slots of the edge block body 61; finally, the edge cover piece 62 is matched with the edge block body 61 to form the edge block assembly 60.

[0059] Third: Assembly of the central rotating body 10. The first corner block magnetic part 54 is installed into the four receiving slots 120 of the central rotating body 10 to complete the assembly of the central rotating body 10.

[0060] Fourth: Assembly of the center block assembly. First, align the notch of the center shaft 21 and the center connecting part 11, then put one spring 24, one gasket 25 and one screw into the hole of the center connecting part 11, tighten the screw, and finally install the four center covers 23 and the four side connecting blocks 30 on the center block 22. The side connecting blocks 30 are closely attached to the center block 22 to complete the assembly of the entire center block assembly.

[0061] Fifth: Assembly of the middle edge block 40. First, assemble two middle edge blocks 40 into a middle edge block assembly, and then install the middle edge block assembly into the slot opening of the edge block body 61. The middle edge block 40 is closely attached to the two side connecting blocks 3022 to complete the assembly of the entire edge block assembly 60.

[0062] Sixth: Assemble the center block assembly, the corner block assembly 50, and the edge block assembly 60 through the central rotating body 10 to complete the assembly of the entire Rubik's Cube.

[0063] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Without departing from the principles and spirit of the present invention, those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A fourth-order Rubik's Cube, characterized in that: The invention comprises a central mechanism, a corner block assembly (50) and an edge block assembly (60), wherein the edge block assembly (60) is rotatably connected to the corner block assembly (50) through the central mechanism, the corner block assembly (50) and the adjacent edge block assembly (60) are mutually attracted, and two adjacent edge block assemblies (60) are mutually attracted; the central mechanism comprises a central rotating body (10), a central block assembly arranged at the end of the central rotating body (10), a connecting piece (70) for connecting the central rotating body (10) and the central block assembly, a side connecting block (30) tightly connected to the central block assembly and a middle edge block (40) tightly connected to the side connecting block (30), wherein the central rotating body (10), the central block assembly, the side connecting block (30) and the middle edge block (40) are combined into a spherical structure, the central rotating body (10) has six central connecting parts (11) and eight central diagonal parts (12), the central block assembly is connected to the central connecting part (11) through the connecting member (70), and the end of each of the central diagonal parts (12) is provided with a diagonal magnetic part (13), the corner block assembly (50) includes a corner block body (51), the corner block body (51) extends to the end of the central rotating body (10) and is provided with a first corner block magnetic part (54), the first corner block magnetic part (54) and the diagonal magnetic part (13) are attracted to each other, and the edge block assembly (60) includes an edge block body (61), and the edge block body (61) is connected to the middle edge block (40).

2. The fourth-order magic cube according to claim 1, characterized in that: An end portion of the central diagonal portion (12) is provided with a receiving groove (120) for accommodating the diagonal magnetic member (13).

3. The fourth-order magic cube according to claim 1, characterized in that: The center block assembly comprises a center shaft (21), each end of the center shaft (21) is provided with a center block (22), the side connection block (30) is pressed against the concave surface of the center block (22), the ends of two adjacent side connection blocks (30) are provided with a center cover (23), the center cover (23) has a supporting portion for supporting the side connection block (30), the center shaft (21) is provided with a connecting through hole (214), and the connecting piece (70) is connected to the center connection portion (11) after passing through the connecting through hole (214).

4. The fourth-order magic cube according to claim 3, characterized in that: The connecting piece (70) is threadedly connected to the central connecting portion (11).

5. The fourth-order magic cube according to claim 3, characterized in that: The center block assembly also includes a spring (24) and a gasket (25). An annular step (212) is provided inside the center shaft (21). The gasket (25) is arranged on the annular step (212). The spring (24) is sleeved on the outside of the connecting member (70) and one end of the spring (24) abuts against the gasket (25). The other end of the spring (24) abuts against the end of the connecting member (70).

6. The fourth-order magic cube according to claim 3, characterized in that: The central axis (21) comprises a connecting column (210) and a connecting block (211) of an integral structure, one end of the connecting column (210) is connected to the connecting block (211), and the other end of the connecting column (210) is butted against the central connecting portion (11), the central block (22) has a central groove and a central through hole, the central through hole is located inside the central groove, the connecting column (210) of the central axis (21) passes through the central through hole, the connecting block (211) is held in the central groove, and a protrusion (213) is provided on the upper end surface of the connecting block (211).

7. The fourth-order magic cube according to claim 2, characterized in that: The side connection block (30) and the middle edge block (40) are connected in a snap-fit ​​manner.

8. The fourth-order magic cube according to claim 7, characterized in that: The side connecting block (30) comprises a first sheet portion (31) and a first block portion (32); the middle edge block (40) comprises a second sheet portion (41) and a second block portion (42); the first sheet portion (31), the second sheet portion (41) and the center block (22) can be located in the same spherical surface; the first block portion (32) is provided with a clamping groove (33); the second block portion (42) is provided with a clamping portion (43) that cooperates with the clamping groove (33); and the clamping portion (43) can be clamped in the clamping groove (33).

9. The fourth-order magic cube according to claim 1, characterized in that: The corner block assembly (50) further comprises a corner cover sheet (52), a corner block magnetic bin (53) and a second corner block magnetic component (55); the three side walls of the corner block body (51) are all equipped with the corner block magnetic bin (53); the three corner block magnetic bins (53) are all equipped with the second corner block magnetic component (55); the three second corner block magnetic components (55) attract each other with the adjacent edge block assemblies (60).

10. The fourth-order magic cube according to claim 9, characterized in that: The edge block assembly (60) further comprises an edge cover sheet (62), an edge block magnetic chamber (63) and an edge block magnetic part (64). The edge block magnetic chamber (63) is installed on both side walls of the edge block body (61). The edge block magnetic parts (64) are installed inside the two edge block magnetic chambers (63). The edge block magnetic parts (64) attract each other with the adjacent second corner block magnetic parts (55).

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