Splicing structure suitable for doll, doll, mold and machining method

Abstract

The invention relates to the technical field of toys, and provides a splicing structure suitable for a doll, the doll, a mold and a machining method. A notch is formed in a part of the opening of the ball socket, and the notch extends in the radial direction of the opening of the ball socket to form a depth; the inner diameter of the opening of the ball socket at the non-notch position is smaller than the maximum diameter of the ball head; and the gap allows the ball socket opening to expand outwards and deform elastically, so that the ball head can be pulled out of and / or pulled out of the ball socket. The requirements for increasing the rotating force and reducing the insertion and extraction force are considered at the same time, the problem of contradiction between the insertion and extraction force and the stability caused by ball socket machining is solved, the structure is simple, and the practicability is high.

Description

Technical Field

[0001] This invention relates to the field of toy technology, specifically to an assembly structure, a doll, a mold, and a processing method suitable for dolls. Background Technology

[0002] In the toy industry, rotating structures with ball heads and sockets are often used to increase realism. In the design of the socket, if the opening is too small, the insertion and extraction forces are too great, making it difficult to assemble and remove the ball head, and hindering assembly. If the opening is too large, the rotational force of the ball head within the socket will be reduced, making it easy to detach, resulting in poor stability. Due to the limitations of socket machining precision in existing technologies, problems with insertion and extraction forces and stability frequently arise. Therefore, resolving the contradiction between insertion and extraction forces and stability has become a major challenge in current socket design. This invention solves these problems by setting a notch in the socket.

[0003] Meanwhile, to mold the ball socket, a matching mold needs to be designed. However, different processing methods in existing technologies result in noticeable processing marks on the ball socket products, affecting product quality. Specifically, the multiple notches in the ball socket require corresponding ball head portions and bosses arranged circumferentially on the ball head portions during mold design, such as... Figure 4 As shown, five-axis machine tools and EDM are typically used for machining. Five-axis machining is relatively time-consuming, and the smallest tool size for corner clearing is R0.3mm. The area connecting the boss and the ball head has a chamfer, making precise machining difficult. Simultaneously, the spherical surface is also difficult to machine precisely, exhibiting a deviation of 0.01-0.02mm, resulting in an ellipse. Assuming EDM is used to machine the spherical surface, there is an accumulation of spark position tolerances during electrical discharge machining, such as... Figure 5 As shown, the two sides have a step difference when hitting each other, which can easily form an ellipse. This affects the feel after being assembled with the ball head. Therefore, a mold needs to be designed to solve the above technical problems. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the purpose of this invention is to provide a suitable assembly structure, doll, mold and processing method for dolls.

[0005] According to the present invention, a building structure suitable for dolls includes a ball socket and a ball head; One or more notches are provided at a portion of the opening of the ball socket, and the notches extend radially along the opening of the ball socket to form a depth; The inner diameter of the fovea opening in the non-notch position is smaller than the maximum diameter of the ball head; The notch allows the socket opening to expand elastically, thereby enabling the ball head to be pulled out and / or pried out of the socket.

[0006] Preferably, the depth of the notch in the radial square of the fovea is 0.5 to 0.6 mm.

[0007] Preferably, the width of the notch is 1.5 to 1.6 mm.

[0008] Preferably, the wall thickness of the fovea at the location of the notch is 1.2 to 2 mm.

[0009] Preferably, the wall thickness of the fovea at the location of the notch is 1.3 to 1.9 mm.

[0010] Preferably, the wall thickness of the fovea at the location of the notch is 1.4 to 1.8 mm.

[0011] Preferably, the wall thickness of the fovea at the location of the notch is 1.5 to 1.7 mm.

[0012] Preferably, the edges of the ball socket opening are chamfered.

[0013] Preferably, the number of notches is two.

[0014] Preferably, the two notches are symmetrically distributed on the opening of the ball socket.

[0015] Preferably, the notch is rectangular or square in shape.

[0016] A mold according to the present invention includes a ball head portion, a connector, and an insert; The root of the ball head portion is connected to the end of the connector, and the edge of the end of the connector extends to the outside of the root of the ball head portion in the radial direction; The ball head portion and the connector form an assembly groove at their connection. The front end of the insert extends into the interior of the assembly groove and the rear end is exposed outside the assembly groove to form a boss. The ball head portion and the boss respectively match the ball socket and notch in the assembly structure suitable for dolls.

[0017] A mold processing method according to the present invention includes the following steps: Step 1: Machin the ball head, connector, and insert; Step 2: Machining an assembly groove at the connection between the ball head and the connector; Step 3: Use EDM to process the part of the insert that connects to the assembly slot; Step 4: Assemble the insert into the mounting slot and fix it in place.

[0018] Preferably, the rear end of the insert is flush with the outer side of the connector and is fixed to the connector by welding.

[0019] Preferably, the welding is laser welding.

[0020] Preferably, the welding position is on the side of the insert away from the ball head portion.

[0021] Preferably, the ball head portion and the connector are integral parts.

[0022] Preferably, the connection between the ball head and the connector is a chamfered structure.

[0023] Preferably, the mold has two assembly slots.

[0024] Preferably, the ball head portion is machined using a lathe, and the insert is machined using wire cutting.

[0025] According to the present invention, a doll is provided, including the aforementioned assembly structure suitable for the doll.

[0026] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention solves the problem of the contradiction between insertion / extraction force and stability caused by poor processing precision of the ball socket by setting a notch at a part of the opening of the ball socket. When the ball head is inserted or pulled out of the ball socket, the notch allows the opening of the ball socket to expand outward elastically, thereby enabling the ball head to be pulled out and / or pried out of the ball socket. At the same time, it takes into account the need for increased rotational force and reduced insertion / extraction force. The structure is simple and highly practical.

[0027] 2. The mold in this invention solves the problem of poor processing quality in the prior art by setting assembly slots and inserts and using lathe machining. This makes the entire processing simpler and more stable, reduces the probability of defective molds, significantly improves processing accuracy and quality, reduces the number of mold repairs, lowers overall costs, and is suitable for the batch production needs of multiple molds. Attached Figure Description

[0028] 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: Figure 1 This is a schematic diagram of the structure of the ball-and-socket joint; Figure 2 This is a schematic diagram of the mold structure, in which the insert is not assembled into the assembly slot; Figure 3 This is a schematic diagram of the mold structure, in which the insert is assembled into the assembly slot; Figure 4 This is a schematic diagram of the mold after five-axis machining. Figure 5 This is a schematic diagram of the mold after EDM processing.

[0029] The diagram shows: 1. Gap 11; Mold 2; Ball head section 21; Assembly slot 211; 2111 protrusion; Connector 22; Inlay 23; Weld 231. Detailed Implementation

[0030] 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.

[0031] Example 1: This invention provides an assembly structure suitable for dolls, including a ball socket 1 and a ball head. One or more notches 11 are provided at a portion of the opening of the ball socket 1. The notches 11 extend radially along the opening of the ball socket 1 to form a depth, denoted as M, which is preferably 0.5–0.6 mm. The notch 11 design facilitates elastic deformation of the opening of the ball socket 1 when the ball head is installed in it. The inner diameter of the opening of the ball socket 1 at non-notch locations is smaller than the maximum diameter of the ball head. The notch 11 allows the opening of the ball socket 1 to expand elastically, thereby enabling the ball head to be pulled out and / or pried out of the ball socket 1. This solves the problem of the contradiction between insertion / extraction force and stability caused by poor machining precision of the ball socket 1. By adding the notch 11, this invention simultaneously addresses the need for increased rotational force and reduced insertion / extraction force, thus resolving the contradiction between insertion / extraction force and stability.

[0032] During strong demolding, the notch 11 is also beneficial for pulling the mold out. At the same time, without the notch 11, the product error has a greater impact on the insertion and extraction force. However, by setting the notch 11, the present invention makes the impact of the product error on the insertion and extraction force smaller, which is beneficial for reducing the processing accuracy of the product.

[0033] The insertion and extraction force mentioned in this invention corresponds to the force of the ball head being pulled out of the ball socket 1, and the rotational force corresponds to the force of the ball head rotating in the ball socket 1. The smaller the opening of the ball socket 1, the greater the degree of enclosure, and the greater the rotational force; the lateral force corresponds to the force of the ball head being pried out of the ball socket 1.

[0034] Specifically, if the wall thickness of the spherical socket 1 at the location of the notch 11 is too thick, the notch 11 will be useless, making it difficult for the opening to expand elastically; if it is too thin, the elastic deformation itself is large, and the notch 11 is not needed. Therefore, the wall thickness of the spherical socket 1 at the location of the notch 11 must be set appropriately. Although there is elastic deformation, the range of elastic deformation is very small, so the range of elastic deformation can be expanded by the notch 11. In this invention, the wall thickness of the spherical socket 1 at the location of the notch 11 is L, and L is preferably 1.2 to 2 mm. Figure 1 As shown, the specific settings can be 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc. By setting the wall thickness of the ball socket 1 where the notch 11 is located, machining errors are allowed in the ball socket 1, which can reduce the machining accuracy of the parts and reduce the machining cost.

[0035] If the notch 11 in this invention is too large, it will cause a sharp decrease in insertion and extraction force, resulting in the ball head coming out of the socket 1 with just a touch. To avoid this situation, the width of the notch 11 corresponding to the opening of the socket 1 is denoted as N. Figure 1 As shown, N is preferably 1.5 to 1.6 mm.

[0036] In practical applications, the number of notches should be designed reasonably. Too many notches will reduce the number of non-notch positions, increasing the risk of wear failure.

[0037] In this embodiment, the shape of the notch 11 as a square when viewed from above can be set to a rectangle or a square.

[0038] To increase the smoothness of assembly, the edges of the opening of the ball socket 1 are chamfered, which helps to improve assembly efficiency.

[0039] To solve the problem of processing the ball socket 1, the present invention also provides a mold 2, including a ball head portion 21, a connecting body 22, and an insert 23, as shown below. Figure 2 , Figure 3 As shown, the root of the ball head portion 21 is connected to the end of the connector 22, and the edge of the end of the connector 22 extends to the outside of the root of the ball head portion 21 in the radial direction, that is, a step is formed at the connection between the end of the connector 22 and the root of the ball head portion 21; an assembly groove 211 is formed at the connection between the ball head portion 21 and the connector 22, the front end of the insert 23 extends into the interior of the assembly groove 211, and the rear end of the insert 23 is exposed outside the assembly groove 211 to form a boss 2111, wherein the ball head portion 21 matches the ball socket 1, and the boss 2111 matches the notch 11, so that the ball socket 1 with the notch 11 in the present invention can be molded during injection molding.

[0040] It should be noted that, due to the size of the mold, the number of assembly slots 211 on the mold is preferably designed to be 2.

[0041] To address the issue of mold processing quality, this invention also provides a mold processing method, comprising the following steps: Step 1: Machining the ball head 21, the connector 22, and the insert 23. The ball head 21 is machined using a lathe, which has high machining accuracy and can produce a complete spherical surface. The insert 23 is machined using wire cutting. Step 2: A mounting groove 211 is machined at the connection between the ball head portion 21 and the connector 22. A part of the mounting groove 211 extends into the ball head portion 21, and another part extends into the connector 22. Step 3: Use EDM to process the part where the insert 23 connects to the opening of the mounting groove 211, such as... Figure 2 Area A shown is the area processed using EDM, which helps improve the processing accuracy of insert 23; Step 4: Assemble the insert 23 into the assembly groove 211 and fix it. To ensure the accuracy of the mold, after the insert 23 is assembled into the assembly groove 211, the outer side of the part where the insert 23 connects with the opening of the assembly groove 211 should be flush, and the insert 23 is fixed to the connector 22 by welding.

[0042] In this invention, the mold first uses a CNC lathe to machine a complete spherical surface for the ball head portion 21, ensuring surface accuracy. Then, an assembly groove 211 is machined at the connection between the ball head portion 21 and the connecting body 22, and a boss 2111 is created using an insert 23, making the entire machining process simpler and more stable. This reduces the probability of defective molds, significantly improves machining accuracy and quality, reduces the number of mold repairs, lowers overall costs, and is suitable for batch production of multiple mold sets.

[0043] It should be noted that the welding position is on the side of the insert 23 away from the ball head portion 21, such as... Figure 3 As shown, a weld 231 is formed on the side of the insert 23 furthest from the ball head portion 21, which can reduce the impact of welding on the mold accuracy. Laser spot welding is preferred for welding.

[0044] Furthermore, the ball head portion 21 and the connector 22 are preferably an integral piece, and the connection between the ball head portion 21 and the connector 22 is a chamfered structure. The opening edge of the ball socket 1 molded by the mold in this invention has no sharp edges, which improves the splicing efficiency.

[0045] The molded product produced by this invention has a spherical surface without lines or invisible depressions. It also has no steps, resulting in high surface integrity. The spherical surface fits perfectly against the inner wall of the socket, with no suspended areas. The socket 1 and the ball head achieve a seamless fit, resulting in uniform friction and stable enveloping force. This ensures that the enveloping frictional rotational force between the socket 1 and the ball head is not reduced, providing a smooth feel. The insertion and extraction force is moderate, approximately 3-6N. When applied to joints, hands, feet, and the waist, the assembly effect is greatly optimized, significantly improving the user experience and ensuring smooth assembly.

[0046] The mold in this invention exhibits good spherical flatness and uniform assembly gaps. Experimental data shows that the tolerance range has been reduced from ±0.05mm to ±0.01mm, and the force deviation has been reduced from 5 Newtons to less than 1 Newton. When the molded ball socket 1 is applied to a four-legged scenario, the insertion and extraction forces are consistent, solving the problem of inconsistent insertion and extraction forces at different joints. It also addresses the issue of significant differences between different molds.

[0047] The present invention also provides a doll, which adopts an assembly structure suitable for dolls.

[0048] Example 2: This embodiment is a preferred example of Embodiment 1.

[0049] In this embodiment, there are two notches 11, and the two notches 11 are symmetrically distributed on the opening of the spherical socket 1, such as... Figure 1 As shown, the depth of notch 11 does not penetrate the wall thickness of the spherical socket 1.

[0050] Taking Example 2 as an example, the working principle of the present invention is as follows: There are two notches 11 at the opening of the ball socket 1. When the ball head is pulled out of the ball socket 1, the opening of the ball socket 1 is subjected to compressive force. Due to the setting of the notches 11, the notches 11 allow the opening of the ball socket 1 to expand and deform elastically, thereby making the deformation of the opening of the ball socket 1 larger, so that the ball head can be pulled out of the ball socket 1. After the ball head leaves the ball socket 1, the opening of the ball socket 1 recovers due to its own elastic deformation.

[0051] 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.

[0052] 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 building structure for dolls, characterized in that, The ball socket (1) and the ball head are included. One or more notches (11) are arranged at the position of the opening of the ball socket (1), and the notches (11) extend along the radial direction of the opening of the ball socket (1) to form a depth. The inner diameter of the opening of the ball socket (1) at the position other than the notches is smaller than the maximum diameter of the ball head. The notches (11) allow the elastic deformation of the opening of the ball socket (1) to enable the ball head to be pulled out and / or pried out of the ball socket (1).

2. The construction kit suitable for dolls according to claim 1, characterized in that, The depth of the notches (11) in the radial direction of the ball socket (1) is 0.5-0.6 mm.

3. The construction kit suitable for dolls according to claim 1, characterized in that, The width of the notches (11) is 1.5-1.6 mm.

4. The construction kit suitable for dolls according to claim 1, characterized in that, The wall thickness of the ball socket (1) at the position of the notches (11) is 1.2-2 mm. Preferably, the wall thickness of the ball socket (1) at the position of the notches (11) is 1.3-1.9 mm. Preferably, the wall thickness of the ball socket (1) at the position of the notches (11) is 1.4-1.8 mm. Preferably, the wall thickness of the ball socket (1) at the position of the notches (11) is 1.5-1.7 mm. Preferably, the edge of the opening of the ball socket (1) is chamfered.

5. The construction kit suitable for dolls according to claim 1, characterized in that, The number of the notches (11) is 2. Preferably, the two notches (11) are symmetrically distributed on the opening of the ball socket (1). Preferably, the shape of the notches (11) is rectangular or square.

6. A mold characterized by, The ball head portion (21), the connecting body (22), and the inlay (23) are included. The root of the ball head portion (21) is connected to the end of the connecting body (22), and the edge of the end of the connecting body (22) extends to the outside of the root of the ball head portion (21) in the radial direction. The connection between the ball head portion (21) and the connecting body (22) forms an assembly groove (211), the front end of the inlay (23) extends to the inside of the assembly groove (211), and the rear end is exposed to the outside of the assembly groove (211) to form a boss (2111), wherein the ball head portion (21) and the boss (2111) respectively match the ball socket (1) and the notch (11) in the doll assembling structure according to any one of claims 1 to 5.

7. A method of processing a mold characterized by, The steps include: Step 1: processing the ball head portion (21), the connecting body (22), and the inlay (23); Step 2: processing the assembly groove (211) at the connection between the ball head portion (21) and the connecting body (22); Step 3: using EDM to process the part of the inlay (23) connected to the mouth of the assembly groove (211); Step 4: assembling the inlay (23) into the assembly groove (211) to fix it.

8. The mold of claim 6 or the method of processing the mold of claim 7, wherein, The rear end of the insert (23) is flush with the outer side of the connecting body (22) and is fixed on the connecting body (22) by welding. Preferably, the welding is laser welding. Preferably, the welding position is on the side of the insert (23) away from the ball head portion (21). Preferably, the ball head portion (21) and the connecting body (22) are an integral piece. Preferably, the connecting position of the ball head portion (21) and the connecting body (22) is a chamfer structure. Preferably, the number of assembly grooves (211) on the mold is 2.

9. The mold of claim 6 or the method of processing the mold of claim 7, wherein, The ball head portion (21) is processed by a lathe, and the insert (23) is processed by wire cutting.

10. A doll characterized in that, A doll suitable for the assembling structure according to any one of claims 1 to 5.

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