Building block toy capable of being assembled infinitely

Abstract

The utility model discloses a building block toy capable of being assembled infinitely. The building block toy comprises a plurality of first building blocks. Each first building block is provided with a first top face, a first bottom face and a first rotating face, the axis of each first rotating face is perpendicular to the first top face and the first bottom face, the first top faces and the first bottom faces are provided with inserting structures, and the first building blocks are detachably connected through the inserting structures so that the first building blocks can be assembled infinitely in the axial direction of the first building blocks. The first rotating surface is provided with a first generatrix and a plurality of first weft circles, a first waist circle exists in the plurality of first weft circles, the curvature Kg of the first generatrix and the curvature Kw of the first waist circle meet the condition that Kg is smaller than or equal to Kw, the axial length L1 of the first building block and the radius R1 of the maximum first weft circle meet the condition that L1 is larger than or equal to 2R1, and the radius R1 of the maximum first weft circle and the radius Rw of the first waist circle meet the condition that Rw is smaller than or equal to 2Rw. The first rotating faces form the waists of the first building blocks, and the multiple first building blocks are in cross lap joint through the waists so that the first building blocks can be assembled infinitely in the radial direction of the first building blocks.

Description

Technical Field

[0001] The present invention belongs to the technical field of children's toys, and in particular relates to a building block toy that can be assembled infinitely. Background Art

[0002] With the rapid development of society and the continuous advancement of science and technology, children's educational toys, as important tools for promoting children's intellectual development and improving their practical skills, are increasingly attracting widespread attention for their design innovation and application value. Building blocks, as a representative product of children's educational toys, have always been popular among parents and children due to their strong plasticity, wide creative space, and ability to stimulate children's imagination and creativity.

[0003] However, traditional building block toys have numerous limitations in design and functionality. First, traditional building blocks often adopt fixed shapes and sizes, which significantly restricts children's ability to assemble them and prevents them from fully unleashing their creativity and imagination. Second, traditional building blocks offer a single assembly method, lacking variety and variability, making it difficult to retain children's attention for extended periods of time. Furthermore, some building block toys are overly complex in structure and functionality, making them difficult for children to operate and understand independently, thus hindering their educational benefits.

[0004] To address these issues, while some improved building block toys have emerged on the market, these products either fail to fundamentally address the assembly and creative limitations of traditional building blocks, or are too difficult to operate, failing to simultaneously meet both unlimited creativity and ease of use. Therefore, developing a children's educational building block that is easy to operate and allows for unlimited assembly has important practical significance and application value. Utility Model Content

[0005] The present invention aims to overcome at least one defect in the prior art and provide a building block toy with infinite assembly, so as to solve the problem that it is difficult to simultaneously meet the requirements of unlimited creativity and convenient operation.

[0006] In order to solve the above technical problems, the following technical solutions are adopted:

[0007] A building block toy capable of infinite assembly includes a plurality of first building blocks. The first building block has a first top surface, a first bottom surface, and a first rotation surface. The axis of the first rotation surface is perpendicular to the first top surface and the first bottom surface. The first top surface and the first bottom surface are provided with a plug-in structure. The plurality of first building blocks are detachably connected via the plug-in structure so that the first building blocks can be infinitely assembled in their axial direction. The first rotation surface has a first busbar and a plurality of first weft circles. Among the plurality of first weft circles, there is a first waist circle. The curvature K of the first busbar is g and the curvature K of the first girdle w Satisfaction: K g ≤K wThe axial length L1 of the first building block and the radius R1 of the largest first latitude circle satisfy: L1 ≥ 2R1, the radius R1 of the largest first latitude circle and the radius R1 of the first waist circle w Satisfaction: R w <R1≤2R w Thus, the first rotating surface forms the waist of the first building block, and multiple first building blocks are cross-connected through the waist, so that the first building blocks can be infinitely assembled in their radial direction.

[0008] This solution enables unlimited assembly of the first building blocks in the axial direction by means of plug-in structures provided on both end surfaces (i.e., the first top surface and the first bottom surface). Simultaneously, the waist formed on the side surface (i.e., the first rotational surface) of the first building block enables unlimited assembly of the first building blocks in the radial direction, thereby enabling unlimited assembly of the first building blocks in both the axial and radial directions. This assembly allows for countless possible combinations, allowing children to create a rich variety of works based on their imagination and creativity, breaking the assembly limitations of traditional building blocks and providing children with a broader and freer creative space. This not only stimulates children's creativity and imagination, but also promotes the development of their hands-on ability, coordination, and thinking skills, and is of great significance in promoting children's intellectual development, enhancing their hands-on ability, and cultivating their innovative spirit and creativity. This building block toy can realize countless combination possibilities with only one type of building block, and its structure and functional design are extremely simple. Moreover, both the plug-in structure and the waist for cross-lap connection have simple and effective connection methods, especially the waist, which only requires the waist of a first building block to be cross-lapped on the waist of another first building block. It is easy to assemble and disassemble, with low operating difficulty, which is conducive to children's independent operation and promotes the development of its educational effect.

[0009] The multiple first latitude circles may also include a first top circle and a first bottom circle. The first top circle, first waist circle, and first bottom circle are arranged sequentially, with the radius of the first latitude circle located between the first top circle and the first waist circle gradually decreasing from the first top circle to the first waist circle, and the radius of the first latitude circle located between the first bottom circle and the first waist circle gradually decreasing from the first bottom circle to the first waist circle. This facilitates shaping the first building blocks into the shape of bamboo internodes. The radii of the first top circle and the first bottom circle are equal, which facilitates shaping the multiple first building blocks assembled through the plug-in structure into the shape of bamboo, attracting children's attention.

[0010] If the curvature K of the first generatrix g and the curvature K of the first girdle w Satisfaction: K g =K w , then the waists of the two cross-jointed first building blocks fit together, forming a cross-shaped arc contact between them. If the curvature of the first generatrix K g and the curvature K of the first girdle wSatisfaction: K g <K w , then the two cross-jointed first building blocks form point contact. In contrast, K g >K w The waist of the first building block is more symmetrical.

[0011] If the axial length L1 of the first building block and the radius R1 of the largest first latitude circle satisfy: L1 = 2R1, then the axial length of the first building block is equivalent to its maximum diameter. If the axial length L1 of the first building block and the radius R1 of the largest first latitude circle satisfy: L1 > 2R1, then the axial length of the first building block is greater than its maximum diameter. In comparison, the first building block with L1 > 2R1 is more slender. g >K w Moreover, the first building block with L1>2R1 is more similar to the internode of bamboo. The combination formed after being assembled through the plug-in structure is closer to the shape of real bamboo and can better attract children's attention.

[0012] If the radius of the largest first latitude circle R1 and the radius of the first waist circle R w Satisfies: R1=2R w , then among the three first building blocks that are cross-connected in pairs, the waist of the middle first building block contacts the waists of the first building blocks on both sides, and the largest diameter parts of the first building blocks on both sides just contact, forming a circle around the middle first building block. w Satisfaction: R w <R1<2R w , then in the three first building blocks that are cross-connected in pairs, the waist of the middle first building block contacts the waists of the first building blocks on both sides, while the first building blocks on both sides do not contact each other. w <R1<2R w The first building blocks have fewer contact points when they are cross-jointed, especially at relatively raised parts, which is more conducive to reducing or avoiding wear.

[0013] The building block toy may also include a plurality of second building blocks, and two first building blocks may be connected in series through the second building blocks to increase the fun of the building block toy. The second building block has a second top surface, a second bottom surface, and a second rotating surface, the axis of the second rotating surface being perpendicular to the second top surface and the second bottom surface, and the second top surface and the second bottom surface are also provided with a plug-in structure, and the first building block and the second building block are detachably connected through the plug-in structure. The plug-in structure includes a plug-in hole and a plug-in shaft that detachably cooperates with the plug-in hole. The plug-in hole can be uniformly configured on the first top surface and the first bottom surface, and the plug-in shaft can be uniformly configured on the second top surface and the second bottom surface, which is conducive to ensuring that there are no relatively protruding plug-in shafts at both ends of the assembly formed by plugging, so that the assembly can be placed with the axis perpendicular to the support surface, and the formed assembly is also more beautiful.

[0014] The second rotating surface has a plurality of second latitude circles, the radius R2 of the largest second latitude circle is equal to the radius R w Satisfaction: R w <R2≤2R w , to avoid interference with the cross-lapping of the first building blocks, and ensure that among the three first building blocks that are cross-lapped in pairs, the waist of the middle first building block is in contact with the waists of the first building blocks on both sides, so as to ensure the structural stability of the assembly formed by the overlap. w Satisfies: R2=2R w , when the three first building blocks are overlapped in pairs, the largest diameter parts of the second building blocks respectively inserted into the first building blocks on both sides just touch; if the radius R2 of the largest second latitude circle is the radius R w Satisfaction: R w <R2<2R w , when the three first building blocks are cross-connected in pairs, there is no contact between the second building blocks plugged into the first building blocks on both sides. w <R2<2R w The second building block is more conducive to reducing or avoiding wear.

[0015] If the axial length L2 of the second building block satisfies the axial length L1 of the first building block: L2 < L1, then the first building block is axially longer than the second building block, which facilitates the second building block to exist as a bamboo node between the two axially assembled first building blocks, making the axially assembled assembly more bamboo-like. The multiple second latitude circles include a second top circle, a second waist circle, and a second bottom circle arranged in sequence. The radius of the second latitude circle located between the second top circle and the second waist circle gradually decreases from the second top circle to the second waist circle, and the radius of the second latitude circle located between the second bottom circle and the second waist circle gradually decreases from the second bottom circle to the second waist circle, making the shape of the second building block more similar to a bamboo node.

[0016] Compared with the prior art, this solution has the following advantages: The first building blocks are infinitely assembled in their axial direction by means of plug-in structures provided on both end surfaces (i.e., the first top surface and the first bottom surface). Furthermore, the first building blocks are infinitely assembled in their radial direction by means of waists formed on the side surfaces (i.e., the first rotational surface), thereby enabling infinite assembly of the first building blocks in both axial and radial directions. This assembly allows for countless possible combinations, allowing children to create a rich variety of works based on their imagination and creativity, breaking the assembly limitations of traditional building blocks and providing children with a broader and more flexible creative space. This building block toy achieves countless possible combinations using only one type of building block, with an extremely simple structural and functional design. Furthermore, both the plug-in structure and the waists for cross-joining are simple and effective in their connection methods. In particular, the waists can be assembled by simply cross-joining the waist of one first building block onto the waist of another first building block. This makes assembly and disassembly easy and easy, facilitating independent operation for children and promoting the educational benefits of the toy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the present invention. To better illustrate the present invention, some components in the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of a possible first building block.

[0019] Figure 2 It is a schematic diagram of the axial assembly of the first building block provided with the plug-in shaft and the plug-in hole.

[0020] Figure 3 It is a schematic diagram of the first building block provided with a plug-in shaft or a plug-in hole being assembled in the axial direction.

[0021] Figure 4 This is a schematic diagram of the first building block being assembled in the radial direction.

[0022] Figure 5 It is a schematic diagram of the assembly of the first building block in the axial and radial directions.

[0023] Figure 6 Schematic diagram of a possible structure of the second building block.

[0024] Figure 7 This is a schematic diagram of another possible structure of the second building block.

[0025] Figure 8 It is a schematic diagram of the axial assembly of a first building block and a second building block, both of which are provided with a plug-in shaft and a plug-in hole.

[0026] Figure 9 It is a schematic diagram of axially assembling a first building block provided with a plug-in hole and a second building block provided with a plug-in shaft.

[0027] Figure 10 It is a schematic diagram of assembling the first building block and the second building block in the axial and radial directions.

[0028] Figure 11 It is a possible assembly diagram of an infinitely assembled building block toy.

[0029] Figure 12 This is another possible assembly diagram of an infinitely assembled building block toy.

[0030] Figure 13 yes Figure 12 A partial cross-sectional view of the infinite assembly building block toy shown.

[0031] Explanation of the accompanying drawings: first building block 100, first top surface 110, first bottom surface 120, first rotating surface 130, first busbar 131, first axis 132, first latitude circle 133, first waist circle 1331, first top circle 1332, first bottom circle 1333, second building block 200, second top surface 210, second bottom surface 220, second rotating surface 230, second busbar 231, second axis 232, second latitude circle 233, second waist circle 2331, second top circle 2332, second bottom circle 2333, plug-in hole 001, plug-in shaft 002. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the present solution, the present solution is further described in detail below with reference to specific embodiments.

[0033] Figures 1 to 13 The figure shows a possible infinite assembly building block toy, which includes at least a plurality of first building blocks 100 and may even include a second building block 200. Figure 1 As shown, the first building block 100 has a first top surface 110 , a first bottom surface 120 and a first rotation surface 130 .

[0034] The first rotating surface 130 is located between the first top surface 110 and the first bottom surface 120. It is a curved surface formed by rotating a curve around a fixed straight line. The curve is the generatrix of the first rotating surface 130, referred to as the first generatrix 131; the fixed straight line is the axis of the first rotating surface 130, referred to as the first axis 132. The first axis 132 is perpendicular to the first top surface 110 and the first bottom surface 120. The first top surface 110 and the first bottom surface 120 are provided with a plug-in structure. The plurality of first building blocks 100 are detachably connected through the plug-in structure so that the first building blocks 100 can be infinitely assembled in their axial direction. Figures 2 and 3 .

[0035] The trajectory of any point on the first busbar 131 when rotating around the first axis 132 is a circle perpendicular to the first axis 132, which can be called a first latitude circle 133. There are multiple first latitude circles 133 on the first rotating surface 130, at least one of which is a first waist circle 1331. The first waist circle 1331 is smaller than the first latitude circles 133 adjacent to each other on both sides, so that the first rotating surface 130 is concave at the first waist circle 1331 and its vicinity, forming the waist of the first building block 100. Multiple first building blocks 100 are cross-connected through the waist, so that the first building blocks 100 can be infinitely assembled in their radial direction, such as Figure 4 .

[0036] The above-mentioned building block toy is designed to have a structure of the first building block 100, so that the first building block 100 can be infinitely assembled in its axial direction and in its radial direction, forming countless possibilities of combination, such as Figures 11-13 , allowing children to assemble and combine unlimited pieces based on their imagination and creativity, creating a rich variety of works. This breaks the limitations of traditional building blocks and provides children with a broader and freer creative space. It not only stimulates children's creativity and imagination, but also promotes the development of their hands-on ability, coordination, and thinking skills. It is of great significance in promoting children's intellectual development, improving their hands-on ability, and cultivating their innovative spirit and creativity. This building block toy can achieve countless possible combinations with only one type of building block, and its structural and functional design is extremely simple. Moreover, both the plug-in structure and the cross-over waist are simple and effective in connection. In particular, the waist can be connected by simply cross-over the waist of a first building block 100 with the waist of another first building block 100. It is easy to assemble and disassemble, and has low operational difficulty, which is conducive to children's independent operation and promotes its educational effect.

[0037] Among the multiple first latitude circles 133, there is only one first top circle 1332 and one first bottom circle 1333. The first top circle 1332 is the circumference formed by rotating one endpoint of the first generatrix 131 around the first axis 132, and the first bottom circle 1333 is the circumference formed by rotating the other endpoint of the first generatrix 131 around the first axis 132. The first waist circle 1331 is located between the first top circle 1332 and the first bottom circle 1333, that is, the first top circle 1332, the first waist circle 1331, and the first bottom circle 1333 are arranged in this order. The radius of the first latitude circle 133 located between the first top circle 1332 and the first waist circle 1331 gradually decreases from the first top circle 1332 to the first waist circle 1331, and the radius of the first latitude circle 133 located between the first bottom circle 1333 and the first waist circle 1331 gradually decreases from the first bottom circle 1333 to the first waist circle 1331, which helps to make the first building block 100 resemble the internode of a bamboo. The radii of the first top circle 1332 and the first bottom circle 1333 are equal, which helps to make the multiple first building blocks 100 assembled through the plug-in structure look like bamboo, thereby attracting children's attention.

[0038] like Figure 5 As shown, the curvature K of the first busbar 131 is g and the curvature K of the first girdle 1331 w Satisfaction: K g ≤K w , so that when two first building blocks 100 are cross-jointed, the first waist circle 1331 of one first building block 100 can contact the first waist circle 1331 of the other first building block 100. The axial length L1 of the first building block 100 and the radius R1 of the maximum first latitude circle 133 satisfy: L1 ≥ 2R1, so that the two first building blocks 100 plugged together can cross-join with the other two first building blocks 100 on the same side without interfering with each other. The radius R1 of the maximum first latitude circle 133 and the radius R1 of the first waist circle 1331 w Satisfaction: R w <R1≤2R w , so that when the three first building blocks 100 are cross-connected in pairs, the waists of the first building blocks 100 on both sides can contact the waist of the middle first building block 100. In this way, the structural stability of the combined body formed by the connection can be ensured.

[0039] If the curvature K of the first busbar 131 g and the curvature K of the first girdle 1331 w Satisfaction: K g =K w , then the waists of the two cross-jointed first building blocks 100 fit together, forming a cross-shaped arc contact between the two. g and the curvature K of the first girdle 1331 wSatisfaction: K g <K w , then the two cross-lapped first building blocks 100 form point contact. g >K w The waist of the first building block 100 is more symmetrical.

[0040] If the axial length L1 of the first building block 100 and the radius R1 of the maximum first latitude circle 133 satisfy: L1 = 2R1, then the axial length of the first building block 100 is equivalent to its maximum diameter. If the axial length L1 of the first building block 100 and the radius R1 of the maximum first latitude circle 133 satisfy: L1 > 2R1, then the axial length of the first building block 100 is greater than its maximum diameter. In comparison, the first building block 100 with L1 > 2R1 is more slender. g >K w Moreover, the first building block 100 with L1>2R1 is more similar to the internode of a bamboo. The assembly formed by assembling through the plug-in structure is closer to the shape of a real bamboo and can better attract children's attention.

[0041] If the radius R1 of the largest first latitude circle 133 and the radius R w Satisfies: R1=2R w , then among the three first building blocks 100 that are cross-connected in pairs, the waist of the middle first building block 100 contacts the waists of the first building blocks 100 on both sides, and the largest diameter parts of the first building blocks 100 on both sides just contact, thus surrounding the middle first building block 100. w Satisfaction: R w <R1<2R w , then in the three first building blocks 100 that are cross-connected in pairs, the waist of the middle first building block 100 contacts the waists of the first building blocks 100 on both sides, while the first building blocks 100 on both sides do not contact each other. w <R1<2R w The first building blocks 100 have fewer contact points when cross-jointed, especially at the relatively raised parts, which is more conducive to reducing or avoiding wear.

[0042] The plug-in structure includes a plug-in hole 001 and a plug-in shaft 002 that can be detachably matched therewith. The plug-in hole 001 and the plug-in shaft 002 can be respectively arranged on the first top surface 110 and the second bottom surface 220 of the same first building block 100. Figure 2 , the plug holes 001 may be configured on the first top surface 110 and the first bottom surface 120 of some first building blocks 100, and the plug shafts 002 may be configured on the first top surface 110 and the first bottom surface 120 of other first building blocks 100, such as Figure 3The latter is conducive to ensuring that both ends of the assembly formed by plugging do not have relatively protruding plug-in shafts 002, so that the assembly can be placed in a form in which the axis is perpendicular to the supporting surface, and the formed assembly is also more beautiful.

[0043] In addition, the two first building blocks 100 can also be connected in series through the second building block 200 to increase the fun of the building block toy. Figures 6 and 7 As shown, the second building block 200 has a second top surface 210, a second bottom surface 220, and a second rotation surface 230. The second rotation surface 230 is located between the second top surface 210 and the second bottom surface 220 and is a curved surface formed by rotating a curve around a fixed straight line. The curve is the generatrix of the second rotation surface 230, referred to as the second generatrix 231; the fixed straight line is the axis of the second rotation surface 230, referred to as the second axis 232. The second axis 232 is perpendicular to the second top surface 210 and the second bottom surface 220. The second top surface 210 and the second bottom surface 220 are also provided with a plug-in structure, and the first building block 100 and the second building block 200 are detachably connected via the plug-in structure. For this purpose, the plug-in shaft 002 and the plug-in hole 001 can be respectively arranged on the first top surface 110 and the first bottom surface 120 of the same first building block 100, and the plug-in shaft 002 and the plug-in hole 001 can be respectively arranged on the second top surface 210 and the second bottom surface 220 of the same second building block 200, as shown in FIG. Figure 8 Alternatively, the plug holes 001 may be uniformly arranged on the first top surface 110 and the first bottom surface 120, and the plug shafts 002 may be uniformly arranged on the second top surface 210 and the second bottom surface 220. Figure 9 The latter is conducive to ensuring that both ends of the assembly formed by plugging do not have relatively protruding plug-in shafts 002, so that the assembly can be placed in a form in which the axis is perpendicular to the supporting surface, and the formed assembly is also more beautiful.

[0044] The trajectory of any point on the second generatrix 231 when rotating around the second axis 232 is a circle perpendicular to the second axis 232, which can be called a second latitude circle 233. There are multiple second latitude circles 233 on the second rotation surface 230, such as Figure 10 As shown, the radius R2 of the largest second latitude circle 233 and the radius R w Satisfaction: R w <R2≤2R w , to avoid interference with the cross-lapping of the first building blocks 100, and to ensure that the waist of the middle first building block 100 in the three first building blocks 100 that are cross-lapped with each other is in contact with the waists of the first building blocks 100 on both sides, so as to ensure the structural stability of the assembly formed by the overlap. w Satisfies: R2=2R w, when the three first building blocks 100 are cross-connected in pairs, the largest diameter parts of the second building blocks 200 respectively inserted into the first building blocks 100 on both sides just touch; if the radius R2 of the largest second latitude circle 233 is the same as the radius R of the first waist circle 1331 w Satisfaction: R w <R2<2R w , when the three first building blocks 100 are cross-connected in pairs, there is no contact between the second building blocks 200 respectively plugged into the first building blocks 100 on both sides. w <R2<2R w The second building block 200 is more conducive to reducing or avoiding wear.

[0045] If the axial length L2 of the second building block 200 and the axial length L1 of the first building block 100 satisfy: L2 < L1, the first building block 100 is axially longer than the second building block 200, which facilitates the second building block 200 to exist as a bamboo node between the two axially assembled first building blocks 100, making the axially assembled assembly more bamboo-like.

[0046] There is one and only one second top circle 2332 and one second bottom circle 2333 in the plurality of second latitude circles 233. The second top circle 2332 is a circle formed by rotating one end point of the second generatrix 231 around the second axis 232. The second bottom circle 2333 is a circle formed by rotating the other end point of the second generatrix 231 around the second axis 232. There is also a second waist circle 2331 in the plurality of second latitude circles 233. Figure 7 As shown, the second waist circle 2331 is smaller than the adjacent second latitudinal circles 233 on both sides, causing the second rotating surface 230 to be concave in the second waist circle 2331 and its vicinity. The second waist circle 2331 is located between the second top circle 2332 and the second bottom circle 2333, i.e., the second top circle 2332, the second waist circle 2331, and the second bottom circle 2333 are arranged in this order. The radius of the second latitudinal circle 233 located between the second top circle 2332 and the second waist circle 2331 gradually decreases from the second top circle 2332 to the second waist circle 2331, and the radius of the second latitudinal circle 233 located between the second bottom circle 2333 and the second waist circle 2331 gradually decreases from the second bottom circle 2333 to the second waist circle 2331, making the shape of the second building block 200 more similar to a bamboo knot.

[0047] Obviously, the above embodiments of this solution are merely examples for the purpose of clarifying this solution and are not intended to limit the implementation of this solution. Those skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this solution shall be included within the scope of protection of the claims of this solution.

Claims

1. A building block toy with unlimited assembly, comprising a plurality of first building blocks, characterized in that: The first building block has a first top surface, a first bottom surface and a first rotating surface, and the axis of the first rotating surface is perpendicular to the first top surface and the first bottom surface; the first top surface and the first bottom surface are provided with a plug-in structure, and a plurality of the first building blocks are detachably connected through the plug-in structure, so that the first building blocks can be infinitely assembled in the axial direction thereof; The first rotation surface has a first generatrix and a plurality of first latitude circles, a first waist circle exists among the plurality of first latitude circles, and a curvature K of the first generatrix g The curvature K of the first girdle w Satisfaction: K g ≤K w , the axial length L1 of the first building block and the radius R1 of the maximum first latitude circle satisfy: L1≥2R1, the radius R1 of the maximum first latitude circle and the radius R1 of the first waist circle w Satisfaction: R w <R1≤2R w The first rotating surface forms the waist of the first building block, and a plurality of the first building blocks are cross-connected through the waist so that the first building blocks can be infinitely assembled in the radial direction.

2. The infinitely assembled building block toy according to claim 1, characterized in that: The second building block also includes a plurality of second building blocks; the second building block has a second top surface, a second bottom surface, and a second rotating surface, the axis of the second rotating surface is perpendicular to the second top surface and the second bottom surface, the second top surface and the second bottom surface are also provided with a plug-in structure, and the first building block and the second building block are detachably connected through the plug-in structure; the second rotating surface has a plurality of second latitude circles, the radius R2 of the largest second latitude circle is equal to the radius R w Satisfaction: R w <R2≤2R w .

3. The infinitely assembled building block toy according to claim 2, characterized in that: The plug-in structure comprises a plug-in hole and a plug-in shaft detachably matched therewith, the plug-in hole is arranged on the first top surface and the first bottom surface, and the plug-in shaft is arranged on the second top surface and the second bottom surface.

4. The infinitely assembled building block toy according to claim 2, characterized in that: The radius R2 of the second largest latitude circle and the radius R w Satisfaction: R w <R2<2R w .

5. The infinitely assembled building block toy according to claim 2, characterized in that: An axial length L2 of the second building block and an axial length L1 of the first building block satisfy: L2<L1.

6. The infinitely assembled building block toy according to claim 2, characterized in that: Among the multiple second latitude circles, there are a second top circle, a second waist circle and a second bottom circle arranged in sequence. The radius of the second latitude circle located between the second top circle and the second waist circle gradually decreases from the second top circle to the second waist circle, and the radius of the second latitude circle located between the second bottom circle and the second waist circle gradually decreases from the second bottom circle to the second waist circle.

7. The infinitely assembled building block toy according to any one of claims 1 to 6, characterized in that: The multiple first latitude circles also have a first top circle and a first bottom circle. The first top circle, the first waist circle and the first bottom circle are arranged in sequence. The radius of the first latitude circle located between the first top circle and the first waist circle gradually decreases from the first top circle to the first waist circle, and the radius of the first latitude circle located between the first bottom circle and the first waist circle gradually decreases from the first bottom circle to the first waist circle.

8. The infinitely assembled building block toy according to claim 7, characterized in that: The radii of the first top circle and the first bottom circle are equal.

9. The infinitely assembled building block toy according to claim 8, characterized in that: The curvature K of the first generatrix g The curvature K of the first girdle w Satisfaction: K g <K w ; and / or The axial length L1 of the first building block and the radius R1 of the maximum first latitude circle satisfy: L1>2R1.

10. The infinitely assembled building block toy according to claim 8, characterized in that: The radius R1 of the maximum first latitude circle and the radius R w Satisfaction: R w <R1<2R w .

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