Building block joint body, injection molding method thereof, mold and toy

Abstract

The invention relates to the technical field of toys, and provides a building block joint body and an injection molding method thereof, a mold and a toy, the building block joint body can be switched between an upright state and a maximum bending state, and the building block joint body comprises a first building block, a second building block and a third building block; the first building block and the third building block are respectively formed at two ends of the second building block in an injection molding manner and can respectively rotate relative to the second building block, and the front end of the second building block extends out of a cover A; when the building block joint body is in the upright state, the first building block and the third building block are not allowed to rotate forwards, and the axis of the first building block is parallel to the axis of the third building block and is closer to the front than the axis of the third building block. The axis of the first building block is closer to the front than the axis of the third building block, so that the legs better conform to the human body shape, the simulation degree of the joint bodies of the building blocks is improved, and the interestingness of the toy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of toys, and in particular to a building block joint body, an injection molding method thereof, a mold, and a toy. Background Art

[0002] At present, the joint design of human-shaped dolls on the market is gradually developing towards movable and high-simulation directions, which can complete various postures and greatly enhance the fun of the toys.

[0003] However, the design of the upper thigh and lower leg of the knee joint is mostly coaxial, which does not reflect the real human body shape and greatly reduces the toy's realism. In addition, the knee joint is generally complex in structure, and the knee joint with many parts makes it difficult for children to assemble it, which needs further improvement. Summary of the Invention

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a building block joint body and its injection molding method, mold, and toy.

[0005] According to the present invention, a building block joint body is provided, which can switch between an upright state and a maximum bending state, and includes a first building block, a second building block and a third building block;

[0006] The first building block and the third building block are respectively injection-molded at two ends of the second building block and are respectively rotatable relative to the second building block, and a cover is extended from the front end of the second building block;

[0007] When the building block joint is in the upright state, the first building block and the third building block are not allowed to rotate forward, and the axis of the first building block is parallel to the axis of the third building block and is closer to the front than the axis of the third building block.

[0008] Preferably, the second building block further comprises a building block body, and the rear side of the cover armor is connected to the building block body.

[0009] Preferably, the cover is integrally formed with the building block body or is detachably connected to the building block body.

[0010] Preferably, when the building block joint is in the maximum bending state, the rear side surface of the building block body does not allow the first building block and the third building block to rotate rearward.

[0011] Preferably, a first gap and a second gap are formed between the upper end and the lower end of the cover respectively and the building block body. When the building block joint body is in the upright state, part of the first building block extends into the first gap, and part of the third building block extends into the second gap.

[0012] Preferably, the front side of the cover nail is an oval structure.

[0013] Preferably, when the building block joint body is in the upright state, the cover is tilted downward in a direction deviating from the horizontal plane.

[0014] Preferably, the first building block and the third building block respectively adopt a non-detachable structure with shaft holes matching with the second building block.

[0015] Preferably, the shaft hole matching structure between the first building block and the second building block is blocked by the first building block.

[0016] Preferably, the matching structure between the third building block and the shaft hole of the second building block is blocked by the third building block.

[0017] Preferably, the end of the building block body close to the third building block has a first step, and the interior of the third building block has a second step, and when the third building block is rotated relative to the second building block until the first step abuts against the second step, the building block joint body is in the upright state. Preferably, the first building block is provided with a first splicing structure.

[0018] Preferably, the first splicing structure is a male connector or a female connector.

[0019] Preferably, the third building block is provided with a second splicing structure.

[0020] Preferably, the second splicing structure is a male connector or a female connector.

[0021] Preferably, when the building block joint body is in the upright state, along the front-back direction, the distance between the axis of the first building block and the second building block and the axis of the third building block and the second building block is L, and the value of L is 1 to 1.6 mm.

[0022] Preferably, the value of L is 1.1 to 1.5 mm.

[0023] Preferably, the value of L is 1.2 to 1.4 mm.

[0024] Preferably, the value of L is 1.25 to 1.35 mm.

[0025] Preferably, when the building block joint body is in the upright state, the distance between the axis of the first building block and the axis of the third building block in the front-to-back direction is M, and the value of M is 1.5 to 2.5 mm.

[0026] Preferably, the value of M is 1.6 to 2.4 mm.

[0027] Preferably, the value of M is 1.7 to 2.3 mm.

[0028] Preferably, the value of M is 1.8 to 2.2 mm.

[0029] Preferably, the value of M is 1.9 to 2.1 mm.

[0030] Preferably, the value of M is 2.08 mm.

[0031] Preferably, the maximum rotation angle of the first building block relative to the second building block is A, and A≤80°.

[0032] Preferably, A≤78°, the maximum rotation angle of the third building block relative to the second building block is B, and B≤70°.

[0033] Preferably, B≤68°.

[0034] According to an injection molding method for a building block joint body provided by the present invention, the building block joint body is used to injection mold the second building block in one shot, and the first building block and the third building block in two shots.

[0035] Preferably, a rubber layer extends from the third building block so that the lower end surface of the cover matched with the third building block is thinned.

[0036] Preferably, the surface of the adhesive layer is a smooth surface that matches the lower end surface of the cover armor.

[0037] Preferably, the smooth surface is a curved surface.

[0038] Preferably, the thickness of the thickest part of the nail is less than or equal to 3 times the thickness of the thinnest part.

[0039] Preferably, the thinnest thickness of the second building block is L, the central wall thickness of the cover is M, and 1.5L≥M.

[0040] Preferably, the upper end surface and the lower end surface of the cover are both curved surfaces with smooth transitions.

[0041] According to a mold provided by the present invention, the building block joint body is molded by adopting the injection molding method of the building block joint body.

[0042] A toy provided by the present invention includes the aforementioned building block joint body or is manufactured using the injection molding method of the aforementioned building block joint body.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] 1. The axis of the first building block in the present invention is closer to the front than the axis of the third building block, so that the legs are more in line with the human body shape, the simulation of the building block joints is improved, and the fun of the toy is increased.

[0045] 2. The first building block and the third building block in the present invention are respectively injection-molded at both ends of the second building block, so there is no need to splice them one by one, and the cover armor and the building block body can be designed as an integrated structure, which reduces the complexity of the joints and reduces the difficulty of splicing for players. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0047] Figure 1 This is a schematic diagram of the front structure of the building block joint;

[0048] Figure 2 for Figure 1 Schematic diagram of the structural cross section of AA;

[0049] Figure 3 for Figure 2 Schematic diagram of the disassembled structure;

[0050] Figure 4 Schematic diagram of the eccentric structure size of the building block joint;

[0051] Figure 5 This is a structural diagram of the rotation angles of each part of the building block joint;

[0052] Figure 6 This is a schematic diagram of the structure of the second building block in one shot injection molding;

[0053] Figure 7 This is a schematic diagram of the structure of the first and third building blocks of the two-shot injection molding;

[0054] Figure 8 This is a schematic diagram of the structure of the thinnest thickness of the second building block;

[0055] Figure 9 This is a schematic diagram of the structure of the center wall thickness of the cap nail;

[0056] Figure 10 This is a schematic diagram of the positions of the upper and lower end surfaces of the cover armor;

[0057] Figure 11 This is a schematic diagram of the one-shot and two-shot parts of the building block joint;

[0058] Figure 12 This is a schematic diagram of the positions 1 and 2 on the second building block;

[0059] Figure 13 This is a schematic diagram of the structure of the glue layer when the building block joint is disassembled;

[0060] Figure 14 This is a schematic diagram of the structure of the glue layer after the building block joints are assembled.

[0061] The figure shows:

[0062] First building block 1;

[0063] A first splicing structure 11;

[0064] Second building block 2;

[0065] Gaijia 21;

[0066] first gap 211;

[0067] a second gap 212;

[0068] Building block body 22;

[0069] First step 221;

[0070] Third building block 3;

[0071] Second step 31;

[0072] Second splicing structure 32;

[0073] Lend glue layer 33. DETAILED DESCRIPTION

[0074] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0075] Example 1:

[0076] The present invention provides a building block joint body, such as Figure 1 、 Figure 2 、 Figure 3 As shown, it can switch between an upright state and a maximum bending state, including a first building block 1, a second building block 2 and a third building block 3. The first building block 1 and the third building block 3 are respectively injection-molded at both ends of the second building block 2 and can rotate relative to the second building block 2. The front end of the second building block 2 extends a cover 21, the rear end of the second building block 2 is a building block body 22, and the rear side of the cover 21 is connected to the building block body 22. When the building block joint body is in the upright state, as shown in FIG. Figure 2 As shown, the first building block 1 and the third building block 3 are not allowed to rotate forward, the axis of the first building block 1 is parallel to the axis of the third building block 3, and the axis of the first building block 1 is closer to the front than the axis of the third building block 3, so that the leg is more in line with the human body shape and the simulation of the building block joint is improved.

[0077] In this embodiment, the cover armor 21 and the building block body 22 are integrally formed. The integrally formed structure solves the problem that the cover armor 21 is easily lost when the cover armor 21 and the building block body 22 are separated structures.

[0078] Specifically, when the block joint is in the maximum bending state, the rear side of the block body 22 limits the rotation of the first block 1 and the third block 3, and does not allow the first block 1 and the third block 3 to rotate backward.

[0079] The upper and lower ends of the cover 21 form a first gap 211 and a second gap 212 with the building block body 22 respectively. When the building block joint body is in an upright state, part of the first building block 1 extends into the first gap 211, and part of the third building block 3 extends into the second gap 212, making the appearance more compact and more realistic.

[0080] In actual application, the front of the cover armor 21 is preferably an elliptical structure. When the building block joint body is in an upright state, the cover armor 21 tilts downward in a direction deviating from the horizontal plane, so that the knee is more in line with the human body shape, thereby improving the simulation of the building block joint body.

[0081] like Figure 2 As shown, the first building block 1 and the third building block 3 respectively adopt a non-detachable structure with an axis hole matching with the second building block 2. The axis hole matching structure of the first building block 1 and the second building block 2 is blocked by the first building block 1; the axis hole matching structure of the third building block 3 and the second building block 2 is blocked by the third building block 3, making it more beautiful when observed from the outside.

[0082] like Figure 2 As shown, the end of the building block body 22 close to the third building block 3 has a first step 221, and the interior of the third building block 3 has a second step 31. The first step 221 matches the second step 31. When the third building block 3 rotates relative to the second building block 2 until the first step 221 abuts against the second step 31, the first step 221 blocks and limits the second step 31, and the building block joint is in an upright state.

[0083] In order to facilitate connection with other parts of the puppet building blocks, the first building block 1 is provided with a first splicing structure 11, and the third building block 3 is provided with a second splicing structure 32, wherein the first splicing structure 11 is preferably a male head or a female head, and the second splicing structure 32 is preferably a male head or a female head.

[0084] When the building block joint is in an upright state, along the front-to-back direction, the distance between the axis of rotation of the first building block 1 and the second building block 2 and the axis of rotation of the third building block 3 and the second building block 2 is L, and the value of L is 1 to 1.6 mm. For example, the value of L is 1.1 to 1.5 mm. For another example, the value of L is 1.2 to 1.4 mm. For another example, the value of L is 1.25 to 1.35 mm. When the building block joint is in an upright state, the distance between the axis of the first building block 1 and the axis of the third building block 3 in the front-to-back direction is M, and the value of M is 1.5-2.5 mm. For example, the value of M is 1.6-2.4 mm. For another example, the value of M is 1.7-2.3 mm. For another example, the value of M is 1.8-2.2 mm. For another example, the value of M is 1.9-2.1 mm. The value of M is preferably 2.08 mm.

[0085] In practical applications, the maximum bending state of the building block joint can be designed according to different characters of the toy. The maximum rotation angle of the first building block 1 relative to the second building block 2 is A, A≤80°, for example, A≤78°. The maximum rotation angle of the third building block 3 relative to the second building block 2 is B, B≤70°, for example, B≤68°.

[0086] The present invention also provides a method for injection molding a building block joint body, using the building block joint body, specifically during molding, first injection molding the second building block 2, and second injection molding the first building block 1 and the third building block 3, such as Figure 6 、 Figure 7 As shown, POM material is preferably used when the second building block 2 is injection molded, and ABS material is preferably used when the first building block 1 and the third building block 3 are injection molded.

[0087] It should be noted that the thickness of the thickest part of the cover armor 21 (i.e., the center wall thickness M) is preferably less than or equal to 3 times the thinnest thickness (L). If the thickness of the thickest part of the cover armor 21 is greater than 3 times the thinnest thickness, the internal stress will be severe when filling the rubber material, which will cause shrinkage. Figure 8 、 Figure 9 、 Figure 12 As shown, the thinnest thickness of the second building block 2 is L, the center wall thickness of the cover armor 21 is M, 1.5L≥M, for example, L is 2mm, M is 2.95mm, the thickness of the thickest part of the cover armor 21 should be selected between 1 and 1.5 times the thinnest thickness of the cover armor 21, the stress of the filling rubber is reduced, and shrinkage can be effectively avoided. This design greatly reduces the risk of shrinkage of the cover armor 21. It should be noted that, if Figure 12 As shown, a portion 1 on the cover armor 21 shows the gap of the second-shot sealing. Compared with the prior art, the gap of the second-shot sealing is smaller, and the shape of the second-shot is more rounded after optimization. The center wall thickness of the cover armor 21 is thinned in the first shot, which avoids or reduces the risk of shrinkage.

[0088] like Figure 2 、 Figure 10As shown, the upper and lower end surfaces of the cover 21 are both smoothly transitioned curved surfaces. When the first building block 1 and the third building block 3 are injection-molded in two shots, the smoothly transitioned curved surfaces on the upper and lower end surfaces of the cover 21 can seal the boundaries of the two shots, preventing glue overflow and burrs after the two shots, thereby greatly improving the aesthetics of the toy.

[0089] like Figure 13 、 Figure 14 As shown, a rubber layer 33 extends from the third building block 3, so that the lower end surface of the cover armor 21 that matches the third building block 3 can be thinned during injection molding, which can reduce the risk of shrinkage of the cover armor 21 during injection molding. The rubber layer 33 has a shape similar to a boss, and the surface of the rubber layer 33 is a smooth surface that matches the lower end surface of the cover armor 21, which is conducive to the smoothness of the rotation of the third building block 3 relative to the cover armor 21.

[0090] Furthermore, since the trajectory of the third building block 3 rotating relative to the cover 21 is an arc trajectory, the smooth surface is preferably a curved surface.

[0091] The present invention also provides a mold, which adopts the injection molding method of building block joint bodies to mold the building block joint bodies.

[0092] The present invention also provides a toy, which includes a building block joint body or is manufactured using the injection molding method of the building block joint body. The toy is preferably a doll toy.

[0093] Example 2:

[0094] This embodiment is a preferred example of embodiment 1. The joint body of the building block in this embodiment is the knee joint of the doll.

[0095] Specifically, when the block joint is in an upright position, the distance between the axis of the first block 1 and the second block 2 and the axis of the third block 3 and the second block 2 in the front-to-back direction is L, with a value of L being 1.35 mm. When the block joint is in an upright position, the distance between the axis of the first block 1 and the axis of the third block 3 in the front-to-back direction is M, with a value of M being 2.08 mm. The first block 1 and the third block 3 each utilize a shaft-hole structure with the second block 2, and the outer diameter of the shafts on the first block 1 and the third block 3 is 1.5 mm.

[0096] Example 3:

[0097] This embodiment is a variation of the embodiment 1. The cover 21 and the building block body 22 are detachably connected. Specifically, the cover 21 is spliced ​​onto the building block body 22 by matching male and female connectors.

[0098] The working principle of the present invention is as follows:

[0099] When the joint body of the building block is in an upright position, Figure 2As shown, the first step 221 blocks and limits the second step 31, preventing the first building block 1 and the third building block 3 from rotating forward. The axis of the first building block 1 is parallel to the axis of the third building block 3, and the axis of the first building block 1 is closer to the front than the axis of the third building block 3. That is, the two holes on the second building block 2 are eccentrically arranged, making the leg more in line with the human body shape and improving the simulation of the building block joints.

[0100] When the joint of the building block is in the maximum bending state, Figure 5 As shown, the rear side of the building block body 22 limits the rotation of the first building block 1 and the third building block 3, and does not allow the first building block 1 and the third building block 3 to rotate backward. The building block joint body reaches the maximum knee flexion state.

[0101] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0102] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A building block joint, characterized in that: Able to switch between an upright state and a maximum bending state, comprising a first building block (1), a second building block (2) and a third building block (3); The first building block (1) and the third building block (3) are respectively injection-molded at the two ends of the second building block (2) and are respectively rotatable relative to the second building block (2); a cover (21) extends from the front end of the second building block (2); When the building block joint is in the upright state, the first building block (1) and the third building block (3) are not allowed to rotate forward, and the axis of the first building block (1) is parallel to the axis of the third building block (3) and is closer to the front than the axis of the third building block (3).

2. The building block joint according to claim 1, characterized in that: The second building block (2) further comprises a building block body (22), and the rear side of the cover armor (21) is connected to the building block body (22). Preferably, the cover armor (21) is integrally formed with the building block body (22) or is detachably connected to the building block body (22). Preferably, when the building block joint body is in the maximum bending state, the rear side surface of the building block body (22) does not allow the first building block (1) and the third building block (3) to rotate toward the rear side. Preferably, the upper end and the lower end of the cover armor (21) respectively form a first gap (211) and a second gap (212) with the building block body (22), and when the building block joint body is in the upright state, part of the first building block (1) extends into the first gap (211), and part of the third building block (3) extends into the second gap (212). Preferably, the front side of the cover armor (21) is an elliptical structure. Preferably, when the building block joint body is in the upright state, the cover armor (21) is tilted downward in a direction deviating from the horizontal plane.

3. The building block joint according to claim 1, characterized in that: The first building block (1) and the third building block (3) are respectively arranged with the second building block (2) in a non-detachable structure with an axis hole. Preferably, the axis hole matching structure of the first building block (1) and the second building block (2) is blocked by the first building block (1). Preferably, the axis hole matching structure of the third building block (3) and the second building block (2) is blocked by the third building block (3). Preferably, the building block body (22) has a first step (221) at one end close to the third building block (3), and the interior of the third building block (3) has a second step (31). When the third building block (3) rotates relative to the second building block (2) until the first step (221) abuts against the second step (31), the building block joint body is in the upright state. Preferably, the first building block (1) is provided with a first splicing structure (11). Preferably, the first splicing structure (11) is a male head or a female head. Preferably, the third building block (3) is provided with a second splicing structure (32). Preferably, the second splicing structure (32) is a male head or a female head.

4. The building block joint according to claim 1, characterized in that: When the block joint body is in the upright state, along the front-back direction, the distance between the axis of the first block (1) and the second block (2) and the axis of the third block (3) and the second block (2) is L, and the value of L is 1 to 1.6 mm. Preferably, the value of L is 1.1 to 1.5 mm. Preferably, the value of L is 1.2 to 1.4 mm. Preferably, the value of L is 1.25 to 1.35 mm. When the block joint body is in the upright state, along the front-back direction, the distance between the axis of the first block (1) and the axis of the third block (3) is M, and the value of M is 1.5 to 2.5 mm. Preferably, the value of M is 1.6 to 2.4 mm. Preferably, the value of M is 1.7 to 2.3 mm. Preferably, the value of M is 1.8 to 2.2 mm. Preferably, the value of M is 1.9 to 2.1 mm. Preferably, the value of M is 2.08 mm.

5. The building block joint according to claim 1, characterized in that: The maximum rotation angle of the first building block (1) relative to the second building block (2) is A, A≤80°. Preferably, A≤78°. The maximum rotation angle of the third building block (3) relative to the second building block (2) is B, B≤70°. Preferably, B≤68°.

6. A method for injection molding a building block joint body, characterized in that: The building block joint body according to any one of claims 1 to 5 is used, wherein the second building block (2) is firstly injection-molded in one shot, and the first building block (1) and the third building block (3) are injection-molded in two shots.

7. The injection molding method of the building block joint body according to claim 6, characterized in that: A rubber layer (33) extends from the third building block (3) so that the lower end surface of the cover armor (21) matched with the third building block (3) is thinned. Preferably, the surface of the rubber layer (33) is a smooth surface that matches the lower end surface of the cover armor (21). Preferably, the smooth surface is a curved surface. Preferably, the thickness of the thickest part of the cover armor (21) is less than or equal to 3 times the thickness of the thinnest part.

8. The injection molding method of the building block joint body according to claim 6, characterized in that: The thinnest thickness of the second building block (2) is L, and the central wall thickness of the cover armor (21) is M, then 1.5L≥M. Preferably, the upper end surface and the lower end surface of the cover armor (21) are both smoothly transitioned curved surfaces.

9. A mold, characterized in that: The building block joint body according to any one of claims 1 to 5 is molded by using the injection molding method of the building block joint body according to any one of claims 6 to 8.

10. A toy, characterized in that: The building block joint body comprises the building block joint body according to any one of claims 1 to 5 or is manufactured by the injection molding method of the building block joint body according to any one of claims 6 to 8.

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