Articulated building block structure and toy

Abstract

The present invention relates to the technical field of toys. Provided are an articulated building block structure and a toy. The articulated building block structure can switch between fully extended and bent states, and comprises a first articular head, a building block member and a second articular head, wherein one end of the first articular head and one end of the second articular head can be assembled together to form a joint; and the building block member is arranged outside the joint such that the joint cannot be disassembled. By means of designing the first articular head, a limiting plate and the second articular head into a structure that cannot be disassembled, the present invention achieves the joint function; in addition, the limiting function can be achieved, increasing the stability of the joint, and part of the joint can also be concealed, thus improving the aesthetic appeal of a toy, such that the toy exhibits high visual realism and good playability.

Description

Jointed building block structures and toys Technical Field

[0001] This invention relates to the field of toy technology, and more specifically, to an articulated building block structure and toy. Background Technology

[0002] The joints of existing doll-like toys are usually designed as movable structures to increase fun and adjust the toy's posture, thus improving its visual appeal. However, in block-based joint toys, joints are formed by assembling blocks. To increase stability in these joint structures, damping alone is often insufficient, resulting in poor stability. Furthermore, when blocks are assembled to form joints, the mating joint components are exposed during rotation, leading to an unsightly appearance. Therefore, there is an urgent need to design a new structure to address these shortcomings. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the purpose of this invention is to provide an articulated building block structure and toy.

[0004] According to the present invention, a jointed building block structure is capable of switching between fully extended and bent states. It includes a first joint head, building block parts, and a second joint head. One end of the first joint head and one end of the second joint head can be spliced ​​together to form a joint. The building block parts are disposed on the outside of the joint and make the joint non-removable.

[0005] When the first joint head and the second joint head are driven to rotate and extend relative to each other, the joint block structure is in a fully extended state when both sides of the first joint head and the second joint head are interfered with by the building block component; when the first joint head and the second joint head are driven to rotate and approach relative to each other, the joint block structure is in a bent state when the first joint head and the second joint head interfere with each other.

[0006] Preferably, the outer surface of the building block has a textured structure.

[0007] Preferably, the building block covers one side of the joint, thereby partially obscuring the joint.

[0008] Preferably, the building block is injection molded to cover one side of the joint.

[0009] Preferably, the building block has a semi-enclosed structure.

[0010] Preferably, the cross-section of the building block is U-shaped.

[0011] Preferably, the first joint head is provided with a first building block shaft, and the second joint head is provided with a first building block hole that matches the first building block shaft. The two joint heads are formed into the joint by injection molding.

[0012] Preferably, the building block is provided with two spaced-apart building blocks, each of which has a second building block hole arranged concentrically, and the two ends of the first building block shaft extend into the two second building block holes respectively, so that the joint cannot be disassembled.

[0013] Preferably, the two building blocks are connected by an arc-shaped groove.

[0014] Preferably, the building block board has a circular structure.

[0015] Preferably, when the articulated block structure is in its fully extended state, it interferes with the first articulated head and the second articulated head by means of the end slots of the two arc-shaped grooves.

[0016] Preferably, the first joint head is provided with a third block hole, and the second joint head is provided with a second block shaft that matches the third block hole. The two joint heads are formed by injection molding.

[0017] Preferably, the building block is provided with two building blocks arranged at intervals, and each of the two building blocks is provided with a second building block hole and is arranged concentrically, and the end of the second building block shaft extends into the second building block hole.

[0018] Preferably, the end of the second block shaft is provided with a fan-shaped annular groove, and the block board is provided with a limiting edge that extends into the interior of the second block hole. When the second joint head rotates relative to the first joint head, the fan-shaped annular groove rotates relative to the limiting edge.

[0019] Preferably, the rotation is sliding.

[0020] Preferably, when the limiting edge contacts and abuts against the inner wall of one end of the annular groove, it can drive the building block to rotate synchronously until the joint building block structure is in the bent state.

[0021] Preferably, the other end of the first joint head is spliced ​​with a first building block cover, and the other end of the second joint head is spliced ​​with a second building block cover.

[0022] Preferably, when the joint block structure is in a bent state, the joint is completely obscured.

[0023] Preferably, when the articulated block structure is in a bent state, the player is allowed to observe part or all of the outer surface of the block.

[0024] Preferably, the other end of the first joint head and the other end of the second joint head are both splicing shafts, and the first block cover and the second block cover are both provided with splicing holes that match the splicing shafts.

[0025] Preferably, the splicing shaft is provided with a flange, and the inside of the splicing hole is provided with a groove that matches the flange.

[0026] Preferably, when switching from a fully extended state to a bent state, the second block cover can drive the block to rotate synchronously.

[0027] Preferably, the outer side of the building block facing the second building block cover is provided with a first outer flange, and the inner side of the second building block cover is provided with a first inner flange. When switching from a fully extended state to a bent state, the second building block cover abuts against the first outer flange through the first inner flange, thereby driving the building block to rotate synchronously.

[0028] Preferably, the outer side of the building block facing the first building block cover is provided with a second outer flange, and the inner side of the first building block cover is provided with a second inner flange. When switching from a fully extended state to a bent state, the joint building block structure is in a bent state when the second inner flange abuts against the second outer flange.

[0029] Preferably, the axis of the first joint head is a first axis, and the axis of the second joint head is a second axis. When the joint rotates such that the first axis is parallel to the second axis, there is an offset distance between the first axis and the second axis.

[0030] Preferably, the end of the first articular head and / or the second articular head away from the joint is a curved structure.

[0031] Preferably, the curved structure includes a skeleton connecting section, an intermediate transition section, and a joint connecting section. The joint connecting section is connected to the joint, one end of the intermediate transition section is connected to the skeleton connecting section, and the other end of the intermediate transition section is connected to the joint connecting section.

[0032] Preferably, the skeleton connecting segment is offset away from the joint connecting segment in a direction away from the joint.

[0033] Preferably, the skeleton connecting segment, intermediate transition segment, and joint connecting segment are all non-bending structures.

[0034] Preferably, a bending structure is formed between the skeleton connecting segment and the intermediate transition segment, and between the intermediate transition segment and the joint connecting segment.

[0035] Preferably, the axis of the skeleton connecting segment is arranged parallel to the axis of the joint connecting segment.

[0036] Preferably, the angles formed by the intermediate transition section and the skeleton connection section, and the angles formed by the intermediate transition section and the joint connection section are both obtuse angles.

[0037] Preferably, the skeleton connecting section, intermediate transition section, and joint connecting section are integrally injection molded.

[0038] Preferably, the outer diameters of the skeleton connecting segment, intermediate transition segment, and joint connecting segment are the same.

[0039] Preferably, the intermediate transition section smoothly transitions to the parts where it connects to the skeleton connection section and the joint connection section.

[0040] Preferably, the cross-sections of the skeleton connecting segment, intermediate transition segment, and joint connecting segment are all cylindrical, regular polygonal, or elliptical.

[0041] Preferably, the first joint head has a first limiting platform, and the second joint head has a second limiting platform. When the joint block structure is in a bent state, the first limiting platform and the second limiting platform come into contact and abut against each other.

[0042] Preferably, the splicing axis of the first joint head and the splicing axis of the second joint head are located in the same plane.

[0043] Preferably, the first joint head has a first positioning platform, and the second joint head has a second positioning platform. When the joint block structure is in a fully extended state, the first positioning platform and the second positioning platform contact and abut each other.

[0044] A toy according to the present invention includes the aforementioned jointed building block structure.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1. The building block component of the present invention is integrally injection molded on the outside of the first joint head and the second joint head, so that the first joint head, the building block component, and the second joint head form a non-removable structure, avoiding the generation of small parts, making the structure simpler, and realizing the joint function. At the same time, the external part of the joint building block structure can be presented through the outer surface of the building block component, simulating the real external state of the toy joint. At the same time, the building block component can cover the part of the joint rotation, realizing the function of concealing ugliness, increasing the visual simulation of the toy, improving the visual aesthetics of the toy, and greatly increasing the fun of the toy.

[0047] 2. The joint block structure of the present invention can achieve a precise limiting function through the cooperation between the block parts and the joint head or through the cooperation between the block parts and the block cover, so that the rotation angle range of the joint is precisely controlled within the set range, increasing the stability and feel of the joint, and increasing the fun of the toy. Attached Figure Description

[0048] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0049] Figure 1 is an exploded view of the structure of the present invention;

[0050] Figure 2 is a schematic cross-sectional view of the structure in Figure 1;

[0051] Figure 3 is a three-dimensional structural diagram of the present invention in its fully extended state;

[0052] Figure 4 is a three-dimensional structural diagram of the present invention when it is in a fully extended state and a bent state.

[0053] Figure 5 is a three-dimensional structural diagram of the present invention in a bent state;

[0054] Figure 6 is a side view of the present invention in its fully extended state.

[0055] Figure 7 is a side view of the present invention when it is in a fully extended state and a bent state.

[0056] Figure 8 is a schematic diagram of the side structure of the present invention when it is in a bent state;

[0057] Figure 9 is a schematic cross-sectional view of the structure shown in Figure 6;

[0058] Figure 10 is a schematic cross-sectional view of the structure in Figure 7;

[0059] Figure 11 is a schematic cross-sectional view of the structure in Figure 8;

[0060] Figure 12 is a schematic cross-sectional view of the structure in the fully extended state in Embodiment 2 of the present invention;

[0061] Figure 13 is a schematic cross-sectional view of the structure in Embodiment 2 of the present invention when it is rotated by a first angle from the fully extended state to the bent state.

[0062] Figure 14 is a schematic cross-sectional view of the structure in Embodiment 2 of the present invention when rotating from the fully extended state to the bent state by a second angle, wherein the second angle is greater than the first angle;

[0063] Figure 15 is a schematic cross-sectional view of the structure in a bent state in Embodiment 2 of the present invention;

[0064] Figure 16 is a schematic diagram of the structure in the fully extended state in Example 3;

[0065] Figure 17 is a schematic diagram of the structure in Example 3 when it is in a fully extended state and a bent state;

[0066] Figure 18 is a schematic diagram of the structure in the bent state in Example 3;

[0067] Figure 19 is a schematic diagram of the curved structure;

[0068] Figure 20 is a schematic diagram comparing the positions of the upper and lower skeletons in the prior art. The dotted lines in the figure are vertical lines and serve as references. (1) The lower end of the upper skeleton and the upper end of the lower skeleton are basically vertically aligned. (2) The lower end of the upper skeleton and the upper end of the lower skeleton are staggered. The horizontal distance between the lower end of the upper skeleton and the upper end of the lower skeleton is the distance between the two dotted lines.

[0069] The diagram shows: First joint head 1, splicing shaft 11, flange 111, first block shaft 12, fan-shaped annular groove 121, first limiting platform 13, first positioning platform 14, block component 2, block board 21, second block hole 211, limiting edge 212, arc groove 22, first outer flange 23, second outer flange 24, second joint head 3, first block hole 31, second limiting platform 32, second positioning platform 33, second block shaft 34, fan-shaped annular groove 341, first block outer sleeve 4, splicing hole 41, groove 411, second inner flange 42, second block outer sleeve 5, first inner flange 51, skeleton connecting section 101, intermediate transition section 102, joint connecting section 103. Detailed Implementation

[0070] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0071] Example 1:

[0072] This invention provides a jointed building block structure that can switch between fully extended and bent states, as shown in Figures 1 and 2. It includes a first joint head 1, a building block 2, and a second joint head 3. One end of the first joint head 1 and one end of the second joint head 3 can be joined together to form a joint. The building block 2 is positioned outside the joint so that it cannot be disassembled. The building block 2 covers one side of the joint, partially obscuring it from external view, thus partially or completely hiding the joint's rotational movement and enhancing the toy's aesthetics. Specifically, the building block 2 can be designed as a semi-enclosed structure, for example, with a U-shaped cross-section. Furthermore, the outer surface of the building block 2 can be textured to simulate the real structure of the joint's exterior, increasing the simulation's fidelity. Taking a knee joint as an example, the texture of the outer surface of the building block 2 can be designed to simulate the texture and color of the knee, presenting a realistic knee appearance from the outside, increasing the knee's realism and improving the simulation effect.

[0073] It should be noted that the first joint head 1, the building block 2, and the second joint head 3 in this invention are preferably injection molded in three colors and integrally formed. Specifically, the injection molding of the first joint head 1 is completed first, then the injection molding of the second joint head 3 is completed, and finally the injection molding of the building block 2 is performed, which makes the stability of the entire structure better.

[0074] As shown in Figures 4, 7, and 10, when the first joint head 1 and the second joint head 3 are driven to rotate and extend relative to each other, the joint block structure is in a fully extended state when both sides of the first joint head 1 and the second joint head 3 are interfered with by the block component 2, as shown in Figures 3, 6, and 9; when the first joint head 1 and the second joint head 3 are driven to rotate and move closer to each other, the joint block structure is in a bent state when the first joint head 1 and the second joint head 3 interfere with each other, as shown in Figures 5, 8, and 11.

[0075] As shown in Figures 1 and 2, the building block 2 has two spaced-apart building block boards 21. Each building block board 21 has a second building block hole 211 arranged concentrically. The two ends of the first building block shaft 12 extend into the two second building block holes 211, thus preventing the joint from being disassembled. In practical applications, the building block 2 is preferably injection molded to cover one side of the joint. Specifically, during injection molding, the first joint head 1 is injection molded first, then the second joint head 3 is injection molded, and finally the building block 2 is injection molded, so that the building block 2 partially covers the outside of the joint. The two building block boards 21 are connected by arc-shaped grooves 22. The building block boards 21 have a circular structure. When the joint building block structure is in its fully extended state, the first joint head 1 and the second joint head 3 are interfered with by the end openings of the two arc-shaped grooves 22.

[0076] It should be noted that the first joint head 1 has a first positioning platform 14, and the second joint head 3 has a second positioning platform 33. When the joint block structure is in a fully extended state, the first positioning platform 14 and the second positioning platform 33 are in contact and abut against each other. At the same time, the first joint head 1 has a first limiting platform 13, and the second joint head 3 has a second limiting platform 32. When the joint block structure is in a bent state, the first limiting platform 13 and the second limiting platform 32 are in contact and abut against each other. Therefore, the joint itself can limit the angle when fully extended and bent by relying solely on its own positioning platform and limiting platform, which improves the fun of the toy.

[0077] As shown in Figures 1 and 2, the other end of the first joint head 1 is attached to a first block cover 4, and the other end of the second joint head 3 is attached to a second block cover 5. The design of the first block cover 4 and the second block cover 5 allows the exterior of the skeleton to be altered through the block covers, enabling the toy to be presented in different shapes to meet the needs of playfulness. When the joint block structure is in a bent state, the joint is completely covered by the block covers and the block pieces 2. At this time, players are allowed to observe part or all of the outer surface of the block pieces 2, making the exterior of the joint block structure more realistic and increasing the toy's fun.

[0078] Furthermore, the other end of the first joint head 1 and the other end of the second joint head 3 are both splicing shafts 11. The first block sleeve 4 and the second block sleeve 5 are both provided with splicing holes 41 that match the splicing shaft 11. The first block sleeve 4 is spliced ​​to the outside of the splicing shaft 11 through the splicing hole 41, and the second block sleeve 5 is spliced ​​to the outside of the splicing shaft 11 through the splicing hole 41. The operation is simple and the splicing is convenient.

[0079] To increase structural stability and feel, a flange 111 is provided on the splicing shaft 11, and a groove 411 matching the flange 111 is provided inside the splicing hole 41. During splicing, the outer diameter of the flange 111 is slightly larger than the inner diameter of the splicing hole 41, which provides a certain resistance during splicing. When the flange 111 reaches the groove 411, it makes a crisp click sound, indicating that the flange 111 has entered the groove 411, prompting the player that the splicing is in place.

[0080] The first joint head 1 is provided with a first building block shaft 12, and the second joint head 3 is provided with a first building block hole 31 that matches the first building block shaft 12. The two joint heads are formed into a joint by injection molding. Both ends of the first building block shaft 12 protrude to the outside of the joint on both sides for connecting with the building block part 2.

[0081] To enhance aesthetics, the splicing axis 11 of the first joint head 1 and the splicing axis 11 of the second joint head 3 are located on the same plane. That is, the movement trajectory of the axis when the structure at both ends of the joint bends and extends is on the same plane, which increases the realism of the toy.

[0082] The present invention also provides a toy, including a joint block structure that can be applied to the human knee joint, as shown in Figures 3 to 11, demonstrating different postures of the thigh, calf and knee joint, making the entire structure more realistic and improving the toy's fun and sophistication.

[0083] Example 2:

[0084] This embodiment differs from Embodiment 1 in that, as shown in Figures 12, 13, 14, and 15, when switching from a fully extended state to a bent state, the second block sleeve 5 can drive the block 2 to rotate synchronously. Specifically, the outer side of the block 2 facing the second block sleeve 5 is provided with a first outer flange 23, the outer side of the block 2 facing the first block sleeve 4 is provided with a second outer flange 24, the inner side of one end of the second block sleeve 5 is provided with a first inner flange 51, and the inner side of one end of the first block sleeve 4 is provided with a second inner flange 42. When switching from a fully extended state to a bent state, the second block sleeve 5 can drive the block 2 to rotate synchronously by abutting the first outer flange 23 through the first inner flange 51. When the second inner flange 42 abuts the second outer flange 24, the articulated block structure is in a bent state. Therefore, throughout the entire process of switching between the fully extended and bent states of the joint block structure, the block 2 fits seamlessly with the first block cover 4 and the second block cover 5, allowing the entire structure to display the outer side of the joint through the three structures of the block 2, the first block cover 4, and the second block cover 5. This effectively conceals any imperfections and showcases the outer surface of the block 2, greatly enhancing the toy's appeal.

[0085] Example 3:

[0086] This embodiment differs from Embodiment 1 in that, as shown in Figures 16, 17, and 18, the first joint head 1 is provided with a third block hole, and the second joint head 3 is provided with a second block shaft 34 that matches the third block hole. The first joint head 1 and the second joint head 3 are formed into a joint by sequential injection molding. The block component 2 is provided with two spaced-apart block boards 21, each of which is provided with a second block hole 211 and is concentrically arranged. The end of the second block shaft 34 extends into the second block hole 211, so that the block component 2 is positioned outside the joint via the second block shaft 34.

[0087] Furthermore, the end of the second block shaft 34 is provided with a fan-shaped annular groove 341, and the block board 21 is provided with a limiting edge 212. The limiting edge 212 extends into the interior of the second block hole 211. When the second joint head 3 rotates relative to the first joint head 1, the fan-shaped annular groove 341 rotates relative to the limiting edge 212. When the end of the limiting edge 212 contacts and abuts against the inner wall of the fan-shaped annular groove 341, the limiting edge 212 is driven to rotate synchronously by the fan-shaped annular groove 341, thereby achieving the effect of driving the block 2 to rotate synchronously until the joint block structure is in a bent state.

[0088] Example 4:

[0089] The difference between this embodiment and embodiment 1 is that the axis of the first joint head 1 is the first axis L1, and the axis of the second joint head 3 is the second axis L2. When the joint rotates so that the first axis is parallel to the second axis, there is an offset distance d between the first axis and the second axis. The offset distance design makes the ends of the first joint head 1 and the second joint head 3 opposite to each other, offsetting each other, so that the thigh and the lower leg are offset from front to back, and the female body beauty formed by the lower leg bending backward can be fully displayed, greatly enhancing the fun of the toy. By designing the offset distance, the problem of the joints not being easy to connect caused by the misalignment design of the upper and lower skeletons can be solved. Specifically, as shown in Figure 20 (2), this is a design to increase the beauty of the legs. The lower leg bends backward so that the entire lower leg structure is back compared to the original design. This structure is more beautiful than the existing design in Figure 20 (1) when posing the legs, increasing the visual beauty. However, for the misaligned design of the upper and lower skeletons in Figure 20 (2), although it can show the beauty of the leg body, the existing joint connection method cannot achieve splicing due to the misalignment when connecting the blocks. In this embodiment, the offset distance of the axis of the two joint heads can solve the problem of skeleton connection difficulties caused by the above misalignment design, and the structure is simple and easy to implement.

[0090] In this embodiment, the ends of the first joint head 1 and / or the second joint head 3 away from the joint are curved structures. The curved structure includes a skeleton connecting section 101, an intermediate transition section 102, and a joint connecting section 103, as shown in Figures 16 and 19. The joint connecting section 103 is connected to the joint. One end of the intermediate transition section 102 is connected to the skeleton connecting section 101, and the other end of the intermediate transition section 102 is connected to the joint connecting section 103. The skeleton connecting section 101 is offset away from the joint connecting section 103. The curved structure design also causes the end of the joint head to be offset. The overall structure of the joint part, combined with the offset distance between the first axis and the second axis, can perfectly present the beauty of the lower leg bending backward, increasing the fun of the toy.

[0091] In this embodiment, the skeleton connecting segment 101, the intermediate transition segment 102, and the joint connecting segment 103 are all non-bending structures. Bending structures are formed between the skeleton connecting segment 101 and the intermediate transition segment 102, and between the intermediate transition segment 102 and the joint connecting segment 103. The combination of the two bending structures presents the overall offset of the bending structure.

[0092] In practical applications, the outer diameters of the skeleton connecting segment 101, the intermediate transition segment 102, and the joint connecting segment 103 are the same, and the intermediate transition segment 102 smoothly transitions to the skeleton connecting segment 101 and the joint connecting segment 103. It should be noted that the cross-sections of the skeleton connecting segment 101, the intermediate transition segment 102, and the joint connecting segment 103 can be designed in various shapes, such as cylindrical, regular polygonal, or elliptical, etc., and can be flexibly selected according to the actual application scenario.

[0093] In this embodiment, the angle θ1 formed by the intermediate transition section 102 and the skeleton connecting section 101, and the angle θ2 formed by the intermediate transition section 102 and the joint connecting section 103 are shown in Figure 19. Both θ1 and θ2 can be designed as right angles or obtuse angles, preferably obtuse angles. The axis of the skeleton connecting section 101 and the axis of the joint connecting section 103 are preferably arranged in parallel.

[0094] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0095] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A jointed building block structure, characterized in that, It can switch between fully extended and bent states, including a first joint head (1), a block (2) and a second joint head (3). One end of the first joint head (1) and one end of the second joint head (3) can be spliced ​​together to form a joint. The block (2) is disposed outside the joint and makes the joint non-removable. When the first joint head (1) and the second joint head (3) are driven to rotate and extend relative to each other, the joint block structure is in a fully extended state when both sides of the first joint head (1) and the second joint head (3) are interfered with by the block component (2); when the first joint head (1) and the second joint head (3) are driven to bend, the joint block structure is in a bent state when the first joint head (1) and the second joint head (3) interfere with each other.

2. The articulated building block structure according to claim 1, characterized in that, The outer surface of the building block (2) has a textured structure. Preferably, the building block (2) covers one side of the joint, thereby partially obscuring the joint. Preferably, the building block (2) is injection molded to cover one side of the joint. Preferably, the building block (2) has a semi-enclosed structure. Preferably, the cross-section of the building block (2) is U-shaped.

3. The articulated modular structure according to claim 1, characterized in that, The first joint head (1) is provided with a first building block shaft (12), and the second joint head (3) is provided with a first building block hole (31) matching the first building block shaft (12). The two joint heads are formed by injection molding. Preferably, the building block part (2) is provided with two building block boards (21) arranged at intervals. Each of the two building block boards (21) is provided with a second building block hole (211) and is arranged concentrically. The two ends of the first building block shaft (12) extend into the two second building block holes (211) respectively, so that the joint cannot be disassembled. Preferably, the two building block boards (21) are connected by arc grooves (22). Preferably, the building block boards (21) are circular. Preferably, when the joint building block structure is in a fully extended state, the first joint head (1) and the second joint head (3) are interfered with by the end slots of the two arc grooves (22). Preferably, the first joint head (1) is provided with a third block hole, and the second joint head (3) is provided with a second block shaft (34) matching the third block hole. The two joint heads are formed by injection molding. Preferably, the block part (2) is provided with two block boards (21) arranged at intervals. Both block boards (21) are provided with second block holes (211) and are arranged concentrically. The end of the second block shaft (34) extends into the second block hole (211). Preferably, the end of the second block shaft (34) is provided with a fan-shaped annular groove (341). The block board (21) is provided with a limiting edge (212) and the limiting edge (212) extends into the interior of the second block hole (211). When the second joint head (3) rotates relative to the first joint head (1), the fan-shaped annular groove (341) rotates relative to the limiting edge (212). Preferably, the rotation is sliding. Preferably, when the limiting edge (212) contacts and abuts against the inner wall of one end of the fan-shaped groove (341), it can drive the building block (2) to rotate synchronously until the joint building block structure is in the bent state.

4. The articulated building block structure according to claim 1, characterized in that, The first joint head (1) is connected to a first block sleeve (4) at one end, and the second joint head (3) is connected to a second block sleeve (5) at one end. Preferably, when the joint block structure is in a bent state, the joint is completely covered. Preferably, when the joint block structure is in a bent state, the player is allowed to observe part or all of the outer surface of the block (2). Preferably, the other end of the first joint head (1) and the other end of the second joint head (3) are both splicing shafts (11), and the first block sleeve (4) and the second block sleeve (5) are both provided with splicing holes (41) that match the splicing shaft (11). Preferably, the splicing shaft (11) is provided with a flange (111), and the splicing hole (41) is provided with a groove (411) that matches the flange (111) inside. Preferably, when switching from a fully extended state to a bent state, the second block sleeve (5) can drive the block (2) to rotate synchronously. Preferably, the outer side of the building block (2) facing the second building block cover (5) is provided with a first outer flange (23), and the inner side of the second building block cover (5) is provided with a first inner flange (51). When switching from a fully extended state to a bent state, the second building block cover (5) abuts against the first outer flange (23) through the first inner flange (51), thereby driving the building block (2) to rotate synchronously. Preferably, the outer side of the building block (2) facing the first building block cover (4) is provided with a second outer flange (24), and the inner side of the first building block cover (4) is provided with a second inner flange (42). When switching from a fully extended state to a bent state, when the second inner flange (42) abuts against the second outer flange (24), the joint building block structure is in a bent state.

5. The articulated modular structure according to claim 1, characterized in that, The axis of the first joint head (1) is a first axis, and the axis of the second joint head (3) is a second axis. When the joint rotates such that the first axis is parallel to the second axis, there is an offset distance between the first axis and the second axis. Preferably, the end of the first joint head (1) and / or the second joint head (3) away from the joint is a curved structure. Preferably, the curved structure includes a skeleton connecting section (101), an intermediate transition section (102), and a joint connecting section (103). The joint connecting section (103) is connected to the joint. One end of the intermediate transition section (102) is connected to the skeleton connecting section (101), and the other end of the intermediate transition section (102) is connected to the joint connecting section (103). Preferably, the skeleton connecting section (101) is offset away from the joint connecting section (103) relative to the joint connecting section (103). Preferably, the skeleton connecting section (101), the intermediate transition section (102), and the joint connecting section (103) are all non-curved structures. Preferably, a bending structure is formed between the skeleton connecting segment (101) and the intermediate transition segment (102), and between the intermediate transition segment (102) and the joint connecting segment (103). Preferably, the axis of the skeleton connecting segment (101) is arranged parallel to the axis of the joint connecting segment (103). Preferably, the angle formed by the intermediate transition segment (102) and the skeleton connecting segment (101), and the angle formed by the intermediate transition segment (102) and the joint connecting segment (103) are both obtuse angles.

6. The articulated modular structure according to claim 5, characterized in that, The skeleton connecting section (101), intermediate transition section (102), and joint connecting section (103) are integrally injection molded. Preferably, the outer diameters of the skeleton connecting section (101), intermediate transition section (102), and joint connecting section (103) are the same. Preferably, the intermediate transition section (102) smoothly transitions to the skeleton connecting section (101) and the joint connecting section (103) respectively. Preferably, the cross-sections of the skeleton connecting section (101), intermediate transition section (102), and joint connecting section (103) are all cylindrical, regular polygonal, or elliptical.

7. The articulated modular structure according to claim 1, characterized in that, The first joint head (1) has a first limiting platform (13), and the second joint head (3) has a second limiting platform (32). When the joint block structure is in a bent state, the first limiting platform (13) and the second limiting platform (32) come into contact and abut against each other.

8. The articulated modular structure according to claim 1, characterized in that, The splicing axis (11) of the first joint head (1) and the splicing axis (11) of the second joint head (3) are located in the same plane.

9. The articulated modular structure according to claim 1, characterized in that, The first joint head (1) has a first positioning platform (14), and the second joint head (3) has a second positioning platform (33). When the joint block structure is in a fully extended state, the first positioning platform (14) and the second positioning platform (33) come into contact and abut against each other.

10. A toy, characterized in that, Includes the articulated building block structure as described in any one of claims 1 to 9.

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