A hair implanting inner lining structure for a stuffed toy and a stuffed toy

Abstract

The utility model discloses a kind of hair transplant inner lining structure and plush toy for plush toy;The lining structure is integrally formed by soft polymer material through glue dropping process, its structure is the sheet gasket or three-dimensional lining cover compatible with the shape of the inner wall of toy scalp part;The sheet gasket thickness is 0.5mm~6mm, its contour extends to the outside of the hair transplant area;The three-dimensional lining cover covers the inner surface of the hair transplant area by 50%, and the thickness is 0.5~6mm and thickness variation rate is less than or equal to 30%;The lining structure is closely attached to the inner wall of plush toy by adhesive layer or suture fixation layer.The utility model solves the problem that wig is not firmly implanted and easily pulled off due to the softness of fabric of plush toy, provides solid base through inner lining structure, makes hair transplant line knot obtain powerful anchoring, improves single cluster wig pull-off force to more than 25N, and supports high-density hair transplantation, while glue dropping process is low in cost, strong in adaptability, especially suitable for the production of complex modeling toys.

Description

Technical Field

[0001] This utility model relates to the field of toy manufacturing technology, specifically to an internal reinforcement structure for the implantation site of a plush toy wig, and more particularly to a hair implantation liner structure made by a dripping process and a plush toy containing the liner structure. Background Technology

[0002] In the manufacture of plush toys, it is a common requirement to implant wigs into the dolls to enhance their appearance and realism.

[0003] Current mainstream processes face significant technical bottlenecks: First, the outer shell of plush toys is usually made of soft, tear-resistant fabric, short plush, and other textile materials. It lacks sufficient rigidity and strength. When the hook of the hair transplant machine pierces the fabric and tries to hook the bottom line, the fabric is very easy to deform rather than be effectively pierced, resulting in a very high slippage rate of the bottom line (more than 90%), which makes it impossible to form a strong knot. Secondly, the wigs implanted using this process have extremely poor stability. Actual measurements show that the pull-out force of a single wig is generally less than 5N, which is far from meeting the internationally accepted toy safety standards (such as ASTM F963, which requires ≥15N). Third, the inability to achieve high-density and uniform hair transplantation on soft fabrics severely limits the product's design space. Therefore, in order to solve the above problems, a hair implantation lining structure for plush toys and a plush toy were developed. Utility Model Content

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: A hair implantation lining structure for plush toys, characterized in that it includes an inner lining body formed by a dripping process. The inner lining body is made of soft material and its shape matches the inner wall contour of the area to be transplanted on the plush toy. The inner lining body is configured as a planar sheet pad or a three-dimensional cover; When the inner lining body is a flat sheet pad, its thickness is 0.5mm to 6mm, and its edge extends beyond the planned boundary of the area to be transplanted. When the inner liner body is a three-dimensional liner, it covers ≥50% of the inner surface area of ​​the area to be transplanted, with a thickness of 0.5mm to 6mm and a thickness variation rate of no more than 30%.

[0005] Preferably, the inner lining body is integrally formed by a dripping process, and the bonding surface that contacts the inner wall of the plush toy has a gradual thickness distribution due to the leveling characteristics of the dripping adhesive.

[0006] Preferably, the material of the inner lining body is one or more of PVC, TPU, silicone, rubber and their modified composite materials.

[0007] Preferably, the Shore hardness range of the inner lining body is 20A to 70A.

[0008] A plush toy includes a shell made of textile fabric and stuffing therein, characterized in that a hair transplant liner structure as described in any one of the above description is fixed inside the area to be transplanted in the shell. The lining structure is tightly bonded to the inner wall of the outer shell through a continuous bonding layer.

[0009] Preferably, the area coverage of the bonding layer is not less than 90%.

[0010] Preferably, the bonding layer is a hot melt adhesive layer, a silicone adhesive layer, a polyurethane adhesive layer, or a stitch layer composed of sutures.

[0011] Preferably, when the inner lining structure is a three-dimensional liner, a buffer gap is maintained between it and the internal filling material.

[0012] Preferably, the thickness of the buffer gap is 0.2mm to 1mm, and the connectivity of the gap is not less than 60%.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The soft inner lining formed by drip-molded resin provides a solid puncture base for the hair transplant machine, ensuring that the bottom line is reliably hooked and forms a strong knot, increasing the pull-out force of a single clump of wig to 25N-35N, far exceeding safety standards.

[0014] 2. The epoxy resin process is particularly suitable for making three-dimensional covers with complex curved surfaces, which can perfectly fit the inner wall of the head of plush toys of various shapes, allowing for a high degree of design freedom.

[0015] 3. Compared with traditional injection molding, epoxy resin molds have significantly reduced costs and shorter production cycles, making them particularly suitable for modern production models with multiple varieties and small batches.

[0016] 4. The stable base support allows the hair transplant density to reach 120 clusters / square centimeter, and the hair transplant density deviation on the entire curved surface is extremely small, resulting in a high aesthetic appearance of the product.

[0017] 5. The high-coverage bonding layer and buffer gap design ensure the long-term stability of the inner lining structure and the toy body, improving the product's durability. Attached Figure Description

[0018] Figure 1 This is a diagram illustrating the principle of traditional fabric-based hair transplantation. Figure 2 This is a schematic diagram of the planar sheet-like liner structure in this utility model: Figure 3 This is a schematic diagram of the inner lining structure of this utility model, which is a three-dimensional cover: Figure 4 This is a cross-sectional view of the inner lining structure of the present invention, which is fixed to the inner wall of the toy by an adhesive layer. Figure 5 This is a cross-sectional view of the inner lining structure of the present invention, which is fixed to the inner wall of the toy through a stitched layer; Figure 6 This is one of the three-dimensional structural diagrams of the inner lining structure of the present invention applied to the head of a plush toy; Figure 7 This is the second three-dimensional structural diagram of the inner lining structure of the present invention applied to the head of a plush toy; The components include: inner lining body 10, outer shell 20, filling material 30, bonding layer 40, hair transplant area 201, and suture layer 401. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," "up," "down," "front," "back," and similar expressions used in this document are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments: like Figure 1-7As shown, a hair implantation lining structure for plush toys includes an lining body 10 formed by a dripping process. The inner lining body 10 is made of soft material and its shape matches the inner wall contour of the hair transplant area 201 of the plush toy. The inner lining body 10 is configured as a planar sheet pad or a three-dimensional cover; When the inner liner body 10 is a flat sheet pad, its thickness is 0.5mm to 6mm, and its edge extends beyond the planned boundary of the hair transplant area 201. When the inner liner body 10 is a three-dimensional liner, it covers ≥50% of the inner surface area of ​​the area to be transplanted 201, with a thickness of 0.5mm to 6mm and a thickness variation rate of no more than 30%.

[0023] In this embodiment, the epoxy resin process is particularly suitable for making three-dimensional liner that matches the contour of the inner wall of the toy. It solves the problem of poor adhesion of injection molded parts on complex curved surfaces, provides uniform support for hair transplantation on curved surfaces, and achieves excellent curvature fit.

[0024] In this embodiment, the thickness range of the inner liner body 10 (0.5-6mm) ensures that the inner liner has sufficient rigidity to resist the puncture of the hair transplant needle and the pulling of the wig, while avoiding excessive hardness and cost waste caused by excessive thickness, thus ensuring effective support strength.

[0025] In this embodiment, since the edge of the planar pad extends to the outside of the area to be transplanted 201, it prevents the hair from falling out due to insufficient support in the edge area, thus ensuring the integrity of the support.

[0026] Furthermore, such as Figure 1-7 As shown, the inner lining body 10 is integrally formed by a dripping adhesive process, and the bonding surface that contacts the inner wall of the plush toy has a gradual thickness distribution due to the leveling characteristics of the dripping adhesive.

[0027] In this embodiment, the process characteristics of the "gradual thickness distribution" avoid stress concentration caused by abrupt changes in thickness, making the bonding interface between the lining and the toy fabric more reliable and less prone to delamination or tearing at the junction.

[0028] Furthermore, such as Figure 1-7 As shown, the material of the inner liner body 10 is set in order to meet the needs of different application parts and different bonding methods; the material of the inner liner body 10 is one or more of PVC, TPU, silicone, rubber and their modified composite materials.

[0029] Furthermore, such as Figure 1-7As shown, in order to meet the needs of different application parts and different bonding methods, the Shore hardness of the inner lining body 10 is set; the Shore hardness range of the inner lining body 10 is 20A to 70A.

[0030] A plush toy includes a shell 20 made of textile fabric and a filling 30 therein, wherein a hair transplant liner structure as described above is fixed inside the hair transplant area 201 of the shell 20. The lining structure is tightly bonded to the inner wall of the outer shell 20 through a continuous bonding layer 40.

[0031] Furthermore, such as Figure 1-7 As shown, the area coverage of the bonding layer 40 is not less than 90%.

[0032] In this embodiment, the high coverage ensures that the liner is almost completely bonded to the inner wall of the toy, avoiding the "bulging" or "lifting" phenomenon caused by local lack of fixation. This allows the support force of the liner to be evenly transmitted to the entire hair transplant area, greatly improving the consistency and reliability of the hair transplant's firmness, thereby achieving reliable fixation throughout the entire area.

[0033] Furthermore, such as Figure 1-7 As shown, in order to meet the needs of different application parts and different bonding methods, the fixing method of the inner liner body 10 and the outer shell 20 is set; the bonding layer 40 is a hot melt adhesive layer, a silicone adhesive layer, a polyurethane adhesive layer, or a stitch layer 401 composed of sutures.

[0034] Furthermore, such as Figure 1-7 As shown, when the inner lining structure is a three-dimensional liner, a buffer gap is maintained between it and the internal filling material 30.

[0035] In this embodiment, the buffer gap can effectively absorb and disperse the impact force during hair transplant needle puncture, as well as the energy generated by pulling the wig during daily play, protecting the inner lining structure from permanent deformation or displacement, and improving the product's durability and service life.

[0036] Furthermore, such as Figure 1-7 As shown, the thickness of the buffer gap is 0.2mm to 1mm, and the connectivity of the gap is not less than 60%.

[0037] In this embodiment, a gap that is too small will not provide sufficient cushioning, while a gap that is too large may affect the appearance of the toy or result in insufficient filling material. Furthermore, with a connectivity rate of ≥60%, the gap can be guaranteed to form an effective cushioning system rather than isolated air bubbles, thereby ensuring the feasibility and consistency of the cushioning effect.

[0038] Example 1: Application of flat sheet pads (for hair transplant areas that are relatively flat or have little curvature) Phase 1: Material and Mold Preparation

[0039] Step S1: Slurry preparation Weigh the following raw materials precisely by weight percentage: 60%-70% PVC paste resin, 25%-35% plasticizer (such as DINP), and 3%-5% calcium-zinc stabilizer.

[0040] Put the above raw materials into a vacuum mixer and stir at high speed in a vacuum environment for 10-15 minutes until they are mixed evenly to form a paste with moderate viscosity and no air bubbles for later use.

[0041] Step S2: Mold Preparation Based on the planar projection shape of the hair transplant area 201 on the plush toy's head, a shallow cavity planar mold with a cavity depth of 1.8mm is made using metal or high-strength engineering materials; the boundary of the mold cavity is the design outline of the padding, and no further cutting of the shape is required.

[0042] The mold cavity surface is polished to a high gloss finish to ensure the smoothness of the molding liner surface.

[0043] Phase Two: Epoxy Resin Molding and Post-processing Step S3: Precision dispensing and automatic leveling The prepared PVC slurry is injected into the storage tank of the precision dispensing equipment.

[0044] The slurry is applied uniformly and quantitatively into the mold cavity through a slit-type coating head. The slurry automatically flows and fills the cavity under its own gravity and surface tension, without the need for external assistance such as a scraper. Step S4: Heat curing Transfer the mold filled with slurry to a curing oven and heat it at 165°C for 15-20 minutes to fully plasticize and completely cure the PVC slurry.

[0045] Step S5: Cooling and demolding After curing, move the mold to the cooling zone and allow it to cool naturally to below 50°C.

[0046] Perform the demolding operation and carefully remove the formed flat sheet-like pad.

[0047] Step S6: Edge Processing After demolding, the liner has its final shape. This step only requires the use of tools (such as tweezers) or light sanding to remove the small amount of burrs or flash generated on the parting surface during demolding, completing the trimming without the need for overall cutting. Phase Three: Installation and Hair Transplantation

[0048] Step S7: Applying adhesive and fixing A layer of PUR (moisture-reactive polyurethane) hot melt adhesive is evenly sprayed onto the entire back side (bonding surface) of the pad.

[0049] Precisely align the glued pad and place it on the corresponding position on the inner wall of the plush toy's head. Apply even pressure and press for 30-60 seconds to ensure the glue layer fully bonds with the fabric.

[0050] Step S8: Hair transplant procedure After the adhesive layer has fully cured, hair transplantation is performed using an industrial hair transplant machine.

[0051] Results: Tests showed that the average pull-out force of the wig bundle reached 30.2N, far exceeding safety standards.

[0052] Example 2: Application of three-dimensional liner (for head shaping with complex curved surfaces) Phase 1: Data and Mold Preparation

[0053] Step S1: 3D Data Acquisition and Mold Design Precise three-dimensional data of the inner wall of the scalp area of ​​a plush dog's head was obtained using a 3D scanner.

[0054] Based on this data, a female mold (mold cavity) that perfectly matches the inner wall contour is manufactured using CNC machining technology.

[0055] Step S2: Slurry preparation Prepare a TPU (thermoplastic polyurethane) epoxy resin with a Shore hardness of approximately 45A.

[0056] Phase Two: Epoxy Resin Molding Step S3: Precision dispensing and automatic leveling The mold is fixed on a horizontal worktable. Through a multi-axis linkage dispensing device, the dispensing head is controlled to move along a three-dimensional path along the complex curved surface of the mold cavity, ensuring that a certain amount of slurry is accurately injected into each part of the cavity.

[0057] After injection, the slurry automatically fills and adheres to the cavity surface based on its own fluidity, completing the coverage. The entire process is static dripping, requiring no mold rotation. Step S4: Curing and Shaping After the slurry is evenly applied, the entire mold is placed in an oven at 170°C and heated for 25 minutes to allow the TPU material to cross-link and cure, thus shaping it into a three-dimensional cover.

[0058] Phase Three: Post-processing and Installation Step S5: Demolding and Trimming After cooling, the formed liner is removed from the mold. This step only requires cleaning and trimming of any small amount of residual material that may remain at the demolding opening, without altering the main shape of the liner. Step S6: Bonding and fixing A layer of room temperature vulcanizing (RTV) silicone rubber adhesive is evenly applied to the bonding surface of the liner, and then it is embedded into the plush dog head shell and fixed with pressure.

[0059] Step S7: Effect This structural design makes the hair transplant extremely secure, and the final product has a soft feel and a realistic shape.

[0060] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model patent.

Claims

1. A hair implantation lining structure for plush toys, characterized in that, This includes the inner lining body formed by the drip molding process; The inner lining body is made of soft material and its shape matches the inner wall contour of the area to be transplanted on the plush toy. The inner lining body is configured as a planar sheet pad or a three-dimensional cover; When the inner lining body is a flat sheet pad, its thickness is 0.5mm to 6mm, and its edge extends beyond the planned boundary of the area to be transplanted. When the inner liner body is a three-dimensional liner, it covers ≥50% of the inner surface area of ​​the area to be transplanted, with a thickness of 0.5mm to 6mm and a thickness variation rate of no more than 30%.

2. The hair implantation lining structure for plush toys according to claim 1, characterized in that, The inner lining body is integrally formed by epoxy resin process, and its bonding surface in contact with the inner wall of the plush toy has a gradual thickness distribution due to the leveling characteristics of epoxy resin.

3. A hair implantation lining structure for plush toys according to claim 1 or 2, characterized in that, The material of the inner lining body is one or more of PVC, TPU, silicone, rubber and their modified composite materials.

4. The hair implantation lining structure for plush toys according to claim 3, characterized in that, The Shore hardness range of the inner lining body is 20A to 70A.

5. A plush toy comprising a shell sewn from textile fabric and stuffing therein, characterized in that, The outer shell is fixed with a hair transplant liner structure as described in any one of claims 1 to 4 on its inner side within the area to be transplanted. The lining structure is tightly bonded to the inner wall of the outer shell through a continuous bonding layer.

6. A plush toy according to claim 5, characterized in that, The area coverage of the bonding layer is not less than 90%.

7. A plush toy according to claim 5, characterized in that, The bonding layer is a hot melt adhesive layer, a silicone adhesive layer, a polyurethane adhesive layer, or a stitch layer composed of sutures.

8. A plush toy according to claim 5, characterized in that, When the inner lining structure is a three-dimensional liner, a buffer gap is maintained between it and the internal filling material.

9. A plush toy according to claim 8, characterized in that, The thickness of the buffer gap is 0.2mm to 1mm, and the connectivity of the gap is not less than 60%.

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