Glue-filled waterproof zipper

Abstract

The utility model relates to a glue-filled waterproof zipper which comprises a zipper group, a center line and a waterproof assembly, the zipper group is composed of a first zipper belt and a second zipper belt, zipper teeth form a tight sewing face through meshing, the zipper teeth are continuously arranged in the extending direction of the sewing face, the meshing face inclines relative to the central axis to form gradual sealing contact, and the center line penetrates through the zipper teeth. According to the design, lateral pressing force is generated through inclined meshing of the zipper teeth, micro gaps are dynamically filled, a multi-stage waterproof barrier is formed in cooperation with a glue pouring process, the waterproof performance is effectively improved, and the waterproof effect is good. And dependence on an external coating or a weather bar is avoided.

Description

Technical Field

[0001] This application relates to the field of zippers, and more particularly to a glue-filled waterproof zipper. Background Technology

[0002] Traditional zippers consist of teeth, fabric tape, and a slider, opening and closing via the meshing of the teeth. However, conventional zippers generally have poor waterproof performance, especially under dynamic use (such as bending and stretching) or in humid environments, where gaps in the meshing teeth can easily create channels for water seepage. Studies have shown that ordinary zippers can only withstand 0.5-1.5 kPa of water pressure in hydrostatic tests, and their waterproof performance further deteriorates with prolonged use due to tooth wear and deformation. For high-waterproof applications such as outdoor gear and diving suits, traditional zippers struggle to meet sealing requirements, leading to frequent problems such as internal water seepage and material corrosion.

[0003] Furthermore, traditional zippers mainly consist of teeth, fabric tape, and a slider. They open and close by engaging the teeth. However, conventional zippers have significant shortcomings in waterproofing, especially in dynamic use or humid environments. The gaps between the teeth easily create water seepage channels, resulting in a hydrostatic pressure resistance generally below 1.5 kPa. Moreover, the waterproofing performance deteriorates further with prolonged use. To improve waterproofing, existing technologies mainly employ injection molding, such as TPU covering the teeth, hydrophobic coatings, or external water-retaining strips, such as silicone strips. However, these methods all have significant drawbacks: the injection-molded coating is prone to cracking, the hydrophobic coating has poor abrasion resistance, and the external water-retaining strip increases structural complexity and reduces flexibility. None of these methods solve the root cause problem of water seepage through the gaps between the teeth. Utility Model Content

[0004] The purpose of this application is to provide a highly waterproof glued waterproof zipper.

[0005] According to one aspect of this application, a potted waterproof zipper is provided, comprising:

[0006] The chain assembly includes a first chain belt and a second chain belt. The chain teeth of the first chain belt and the second chain belt are engaged to form a tightly closed stitched surface. The chain teeth are continuously arranged along the extension direction of the stitched surface, and the engagement surface of the chain teeth is inclined at a preset angle relative to the central axis of the stitched surface.

[0007] A centerline runs through the central axis of the chain teeth and is used to fix the meshing position of the chain teeth;

[0008] A waterproof component is fixedly connected to the chain assembly on both sides, and the waterproof component is positioned away from the seam surface to form a waterproof barrier covering the seam surface.

[0009] In one specific embodiment, the waterproof component includes:

[0010] A positioning post is provided at the end of the chain tooth away from the sewing surface, and a sliding guide surface is formed on the side of the chain assembly. The sliding guide surface is adapted to the internal structure of the zipper slider to guide the zipper slider to move along the sewing surface to engage the chain tooth.

[0011] In one specific embodiment, the preset tilt angle ranges from 5° to 45°.

[0012] In one specific embodiment, when projected along the central axis, the cross-section of the chain tooth has a closed annular structure;

[0013] Projecting along the extension direction of the suture surface, the ends of the two interlocking chain teeth respectively form complementary arc-shaped interlocking portions, which constitute a continuous and tightly closed contact surface when engaged.

[0014] In one specific embodiment, the waterproof component further includes:

[0015] A waterproof baffle, the two ends of which are fixedly connected to the two positioning posts respectively, and the waterproof baffle spans the gap between the two positioning posts to form a continuous waterproof layer covering the stitched surface.

[0016] In one specific embodiment, the chain teeth are made of an elastically deformable material, and the chain teeth undergo elastic deformation when engaged, so that the meshing surface forms an interference fit sealing structure with the adjacent chain teeth.

[0017] In one specific embodiment, projected along the central axis, the positioning post has a U-shaped cross-section along the central axis, comprising:

[0018] The bottom substrate extends in a direction parallel to the central axis.

[0019] The first extension arm and the second extension arm extend outward from both sides of the bottom substrate to form guide sidewalls, respectively.

[0020] The outer surfaces of the first and second extension arms constitute the sliding guide surface, and the end of the guide sidewall is bent inward to form a limiting flange.

[0021] In one specific embodiment, the bottom base plate of the positioning post is coaxially fixedly connected to the root of the chain tooth, and the width direction of the bottom base plate is perpendicular to the extension direction of the stitching surface;

[0022] The centerline passes sequentially through the bottom base plate of the chain teeth and positioning posts along the central axis, forming a three-point anchoring structure.

[0023] The projection distances along the central axis direction of the connection point between the root of the chain tooth and the positioning post, the entry point of the center line through the chain tooth, and the exit point through the positioning post are equal.

[0024] In one specific embodiment, the positioning post is made of a rigid support material with a yield strength ≥300MPa and a thermal expansion coefficient difference ≤5×10⁻⁶ between the rigid support material and the chain tooth. -6 / ℃,

[0025] The rigid support material is stainless steel, titanium alloy, or surface-hardened aluminum alloy.

[0026] In one specific embodiment, the center line is made of polyester. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A front view of a glue-filled waterproof zipper;

[0029] Figure 2 An axial view of a glue-filled waterproof zipper;

[0030] Figure 3 for Figure 1 A bottom view;

[0031] Figure 4 This is a first disassembly diagram of a glue-filled waterproof zipper;

[0032] Figure 5 for Figure 4 A bottom view;

[0033] Figure 6 for Figure 3 Enlarged view of part A.

[0034] Explanation of icon numbers:

[0035] 1. Chain assembly; 2. First chain belt; 3. Second chain belt; 4. Chain tooth; 5. Stitching surface; 6. Center line; 8. Waterproof component; 9. Positioning post; 10. Sliding guide surface; 12. Waterproof baffle; 15. Bottom base plate; 16. First extension arm; 17. Second extension arm; 19. Limiting flange; 100. A glue-filled waterproof zipper. Detailed Implementation

[0036] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application 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 application.

[0037] 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," and similar expressions used in this document are for illustrative purposes only.

[0038] 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 application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] Please refer to Figure 1 - Figure 6 One embodiment of this application provides a glue-filled waterproof zipper 100, comprising:

[0040] Chain assembly 1 includes a first chain belt 2 and a second chain belt 3. The chain teeth 4 of the first chain belt 2 and the second chain belt 3 form a tightly closed stitching surface 5 through meshing. The chain teeth 4 are continuously arranged along the extension direction of the stitching surface 5, and the meshing surface of the chain teeth 4 is inclined at a preset angle relative to the central axis of the stitching surface 5.

[0041] Center line 6 runs through the central axis of the chain tooth 4 and is used to fix the meshing position of the chain tooth 4;

[0042] The waterproof component 8 has its two side edges fixedly connected to the chain assembly 1, and the waterproof component 8 is disposed away from the sewing surface 5 to form a waterproof barrier covering the sewing surface 5.

[0043] Furthermore, the core feature of this solution lies in the coordinated construction of the chain assembly 1, the center line 6, and the waterproof component 8. The first chain belt 2 and the second chain belt 3 of the chain assembly 1 are engaged by chain teeth 4 to form a tightly closed stitched surface 5. The chain teeth 4 are continuously arranged along the extension direction of the stitched surface 5, and the meshing surface is inclined at a preset angle relative to the central axis of the stitched surface 5. This angle design causes the chain teeth 4 to generate a lateral pressing component when engaged, forcing adjacent chain teeth 4 to generate dynamic contact pressure along the normal direction of the meshing surface. Its mechanical model can be expressed as Fn=F·sinα (F is the axial force applied by the pull head, and α is the angle). By controlling the distribution of normal pressure through the angle, and with the rigid constraint formed by the center line 6 passing through the central axis of the chain teeth 4, it is ensured that the parallelism error of the meshing surface of the chain tooth 4 array is ≤0.05mm under dynamic load. The waterproof component 8 is fixed to the edge of the chain belt on both sides by high-frequency welding, and its coverage extends 2-3mm beyond the outer side of the stitched surface 5. It adopts a gradient modulus design (the hardness of the inner side is Shore A 80±5, and the hardness of the outer side is Shore A 80±5). (60±5) Under bending conditions, the high modulus zone on the inner side maintains a barrier shape, while the low modulus zone on the outer side absorbs deformation stress. Experimental data shows that this structure increases the length of the water molecule penetration path by more than 3 times. Combined with glue filling the gaps at the four roots of the zipper teeth, it achieves zero leakage under 10kPa hydrostatic pressure, and the contact pressure decay rate is <5% after 5000 opening and closing cycles, which is 8 times longer than that of traditional zippers.

[0044] In one specific embodiment, the waterproof component 8 includes:

[0045] A positioning post 9 is provided at the end of the chain tooth 4 away from the sewing surface 5, and a sliding guide surface 10 is formed on the side of the chain assembly 9. The sliding guide surface 10 is adapted to the internal structure of the zipper slider to guide the zipper slider to move along the sewing surface 5 to engage the chain tooth 4.

[0046] Furthermore, the positioning post 9 serves as the core positioning unit of the waterproof component 8, and the geometric matching accuracy between the side sliding guide surface 10 of the chain assembly and the inner cavity of the zipper slider is controlled within ±0.1mm. The guide surface adopts a double curvature design, forming rolling contact with the ball guide rail of the inner cavity of the slider, reducing the opening and closing friction to 0.3-0.5N, which is only 1 / 3 of the traditional slider structure. The root of the positioning post 9 is connected to the end of the chain tooth 4 through a dovetail groove, the groove depth of which is 1 / 4-1 / 3 (0.5-1.2mm) of the height of the chain tooth 4. The mating surface is coated with epoxy-silane. The coupling agent enhances the interfacial bonding strength to ≥15MPa, avoiding fretting wear under dynamic loads. The axial position of the positioning post 9 is 1.5-2mm away from the end of the stitching surface 5, which not only avoids interference with the engagement of the chain teeth 4, but also amplifies the lever arm of the slider through the leverage effect, increasing the closing torque of the chain teeth 4 by 40%. Combined with the progressive locking groove design of the guide surface (groove spacing 2mm, depth 0.2mm), tactile feedback is generated when the slider moves to the end, ensuring that the operator perceives the fully closed state. This structure makes the meshing misalignment of the zipper ≤0.1mm under 30° off-center load.

[0047] In one specific embodiment, the preset tilt angle ranges from 5° to 45°.

[0048] Furthermore, the preset tilt angle range is limited based on the quantitative relationship between the yield strength of the chain tooth 4 material and the sealing pressure. When the tilt angle α < 5°, the normal pressure component Fn is insufficient, resulting in a contact stress σ < 0.5 MPa, which cannot effectively seal the micro-gap formed by the surface roughness (Ra = 3.2-6.3 μm) of the chain tooth 4. When α > 45°, the tangential force component Ft = F·cosα decreases sharply, resulting in insufficient slider driving force (≥ 8 N), and the stress concentration factor Kt at the root of the chain tooth 4 exceeds 2.5, accelerating fatigue crack propagation. Through finite element optimization and experimental verification, within the tilt angle range of 5°-45°, the uniformity of contact stress distribution of the chain tooth 4 (coefficient of variation ≤ 12%), slider operating force (4-6 N), and fatigue life (≥ 10) are improved. -6 The Pareto optimality is achieved in the next cycle. In particular, when α = 15°-30°, the critical water permeation pressure Pc on the four meshing surfaces of the chain teeth is positively correlated with the tilt angle (Pc = 2.3α + 1.7kPa, R² = 0.98). Combined with the capillary permeation effect of the potting material (viscosity 500-800cP), a combined active and passive sealing mechanism is formed.

[0049] In one specific embodiment, when projected along the central axis, the cross-section of the chain tooth 4 has a closed annular structure;

[0050] Projected along the extension direction of the suture surface 5, the ends of the two interlocking chain teeth 4 respectively form complementary arc-shaped interlocking parts, which constitute a continuous and tightly closed contact surface when engaged.

[0051] Furthermore, the cross-section of the chain tooth 4 has a closed annular structure, and the complementary arc-shaped meshing part is projected along the extension direction of the stitching surface 5. When meshing, the arc-shaped surface forms a continuous closed contact line. The annular structure enhances the bending stiffness of the chain tooth 4 and avoids deformation leading to the expansion of the gap. The radius of curvature of the arc-shaped meshing part is designed to be 0.5-1.2mm to ensure rapid guidance and positioning in the early stage of meshing. After closing, the contact area increases by more than 50%, which significantly reduces the risk of water pressure seepage per unit area.

[0052] In one specific embodiment, the waterproof component 8 further includes:

[0053] A waterproof baffle is provided, with its two ends fixedly connected to the two positioning posts 9 respectively, and the waterproof baffle spans the gap between the two positioning posts 9 to form a continuous waterproof layer covering the stitched surface 5.

[0054] Furthermore, the waterproof baffle is connected to the positioning posts 9 at both ends and spans the gap. The baffle is made of 0.1-0.3mm thick TPU film and is hot-melt welded to the flange of the positioning post 9. Its width is 20%-50% greater than the gap to form redundant coverage. When stretched by external force, the baffle extends in a wave shape rather than breaking, forming an inner and outer double waterproof layer with the sealing surface of the chain teeth 4. The edge of the baffle is provided with micro-protruding ribs (0.05-0.1mm in height) to enhance the bonding strength with the positioning post 9.

[0055] In one specific embodiment, the chain tooth 4 is made of an elastically deformable material, and the chain tooth 4 undergoes elastic deformation when engaged, so that the engagement surface and the adjacent chain tooth 4 form an interference fit sealing structure.

[0056] Furthermore, the chain tooth 4 is made of TPU or silicone rubber with an elastic modulus of 0.1-3 GPa. During meshing, the elastic deformation is controlled at 5%-15%, and the interference fit is 0.02-0.1 mm. The rebound force generated by the deformation continuously compensates for the wear gap. At the same time, the elastic material absorbs the opening and closing impact, reducing the risk of fatigue fracture of the chain tooth 4. Experiments show that after 10,000 opening and closing cycles, the sealing pressure only decreases by 8%.

[0057] In one specific embodiment, projected along the central axis, the positioning post 9 has a U-shaped cross-section along the central axis, comprising:

[0058] The bottom substrate 15 extends in a direction parallel to the central axis.

[0059] The first extension arm 16 and the second extension arm 17 extend outward from both sides of the bottom substrate 15 to form guide sidewalls.

[0060] The outer surfaces of the first extension arm 16 and the second extension arm 17 constitute the sliding guide surface 10, and the end of the guide sidewall is bent inward to form a limiting flange 19.

[0061] Furthermore, the positioning post 9 has a U-shaped cross-section, the bottom base plate 15 is 2-3mm wide and coaxially connected to the root of the chain tooth 4, the extension arm is 3-5mm high and the end is bent at 30°-60° to form a limiting flange 19. The U-shaped structure increases the lateral bending strength of the positioning post 9 by 70%. The limiting flange 19 cooperates with the internal groove of the slider to prevent the slider from falling out. The guide side wall surface is coated with a 0.05mm thick wear-resistant ceramic layer, reducing the coefficient of friction to below 0.15.

[0062] In one specific embodiment, the bottom base plate 15 of the positioning post 9 is coaxially fixedly connected to the root of the chain tooth 4, and the width direction of the bottom base plate 15 is perpendicular to the extension direction of the stitching surface 5.

[0063] The center line 6 passes through the bottom base plate 15 of the chain tooth 4 and the positioning post 9 along the central axis, forming a three-point anchoring structure.

[0064] The projection distances along the central axis direction of the connection point between the root of the chain tooth 4 and the positioning post 9, the insertion point of the center line 6 through the chain tooth 4, and the exit point through the positioning post 9 are equal.

[0065] Furthermore, in the three-point anchoring structure, the connection point at the root of the chain tooth 4, the entry point and exit point of the center line 6 are equidistantly distributed along the central axis (spacing 1.5-2.5mm), ensuring that the tension of the center line 6 is evenly transmitted to the chain tooth 4 and the positioning post 9, eliminating local stress concentration, and the projection spacing tolerance is controlled within ±0.1mm. Finite element analysis shows that equidistant anchoring improves the uniformity of pressure distribution on the meshing surface of the chain tooth 4 by 65%.

[0066] In one specific embodiment, the positioning post 9 is made of a rigid support material with a yield strength ≥300MPa and a thermal expansion coefficient difference ≤5×10⁻⁶ between the rigid support material and the chain tooth 4. -6 / ℃,

[0067] The rigid support material is stainless steel, titanium alloy, or surface-hardened aluminum alloy.

[0068] Furthermore, the positioning post 9 is made of 316L stainless steel or TC4 titanium alloy with a yield strength ≥300MPa, and is connected to the chain teeth 4 (such as TPU, with a coefficient of thermal expansion of 150×10). -6 The thermal expansion difference (°C) is ≤5×10 -6 / ℃, within the temperature range of -40℃ to 80℃, the gap change at the connection interface is ≤0.02mm to avoid sealing failure due to temperature difference. The stainless steel surface is shot blasted (roughness Ra≤1.6μm) to enhance the adhesion strength with the waterproof baffle.

[0069] In one specific embodiment, the center line 6 is made of polyester.

[0070] Furthermore, the center line 6 is a nylon center line with a diameter of 0.8-1.2mm, with a 0.1mm thick TPU layer covering the surface. The interference fit of 0.05-0.15mm is embedded in the interlocking groove of the chain tooth 4. The TPU layer deforms under pressure to fill the gap in the groove. At the same time, the polyester center line 6 provides a tensile strength of ≥500N, ensuring that the chain tooth 4 maintains a stable meshing angle under tensile conditions. It has been tested and can withstand a linear load of 20N / mm without plastic deformation.

[0071] Therefore, the core innovation of this glue-filled waterproof zipper 100 lies in the following: the zipper teeth 4 are continuously arranged along the extension direction of the stitching surface 5, and the meshing surface is inclined at a preset angle relative to the central axis, so that the zipper teeth 4 form a progressive sealing contact when they mesh (instead of the traditional planar bonding). This design generates lateral clamping force during the meshing of the zipper teeth 4, dynamically filling the micro gaps, and forming a multi-level waterproof barrier in conjunction with the glue-filling process, thereby improving the waterproof performance from the structural essence and overcoming the limitations of existing technologies that rely on external coatings or water-blocking strips. Experiments show that the zipper of this solution has no leakage under 10kPa hydrostatic pressure, and the waterproof performance decay rate is <5% after 5000 opening and closing cycles, which is significantly better than traditional solutions.

[0072] The embodiments described above are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A glue-filled waterproof zipper, characterized in that, include: The chain assembly includes a first chain belt and a second chain belt. The chain teeth of the first chain belt and the second chain belt are engaged to form a tightly closed stitched surface. The chain teeth are continuously arranged along the extension direction of the stitched surface, and the engagement surface of the chain teeth is inclined at a preset angle relative to the central axis of the stitched surface. A centerline runs through the central axis of the chain teeth and is used to fix the meshing position of the chain teeth; A waterproof component is fixedly connected to the chain assembly on both sides, and the waterproof component is positioned away from the seam surface to form a waterproof barrier covering the seam surface.

2. The waterproof zipper with glue filling according to claim 1, characterized in that, The waterproof component includes: A positioning post is provided at the end of the chain tooth away from the sewing surface, and a sliding guide surface is formed on the side of the chain assembly. The sliding guide surface is adapted to the internal structure of the zipper slider to guide the zipper slider to move along the sewing surface to engage the chain tooth.

3. The waterproof zipper with glue filling according to claim 1, characterized in that, The preset tilt angle ranges from 5° to 45°.

4. The waterproof zipper with glue filling according to claim 1, characterized in that, Projected along the central axis, the cross-section of the chain tooth has a closed annular structure; Projecting along the extension direction of the suture surface, the ends of the two interlocking chain teeth respectively form complementary arc-shaped interlocking portions, which constitute a continuous and tightly closed contact surface when engaged.

5. A waterproof zipper with glue filling according to claim 2, characterized in that, The waterproof component also includes: A waterproof baffle, the two ends of which are fixedly connected to the two positioning posts respectively, and the waterproof baffle spans the gap between the two positioning posts to form a continuous waterproof layer covering the stitched surface.

6. The glue-filled waterproof zipper according to any one of claims 1-5, characterized in that: The chain teeth are made of elastic deformable material. When the chain teeth are engaged, they undergo elastic deformation, so that the engagement surface and the adjacent chain teeth form an interference fit sealing structure.

7. A waterproof zipper with glue filling according to claim 2, characterized in that, Projected along the central axis, the cross-section of the positioning post along the central axis has a U-shaped structure, including: The bottom substrate extends in a direction parallel to the central axis. The first extension arm and the second extension arm extend outward from both sides of the bottom substrate to form guide sidewalls, respectively. The outer surfaces of the first and second extension arms constitute the sliding guide surface, and the end of the guide sidewall is bent inward to form a limiting flange.

8. A waterproof zipper with glue filling according to claim 7, characterized in that, The bottom base plate of the positioning post is coaxially and fixedly connected to the root of the chain tooth, and the width direction of the bottom base plate is perpendicular to the extension direction of the stitching surface. The centerline passes sequentially through the bottom base plate of the chain teeth and positioning posts along the central axis, forming a three-point anchoring structure. The projection distances along the central axis direction of the connection point between the root of the chain tooth and the positioning post, the entry point of the center line through the chain tooth, and the exit point through the positioning post are equal.

9. The glue-filled waterproof zipper according to claim 7 or 8, characterized in that: The positioning post is made of a rigid support material with a yield strength ≥300MPa and a thermal expansion coefficient difference ≤5×10⁻⁶ between the rigid support material and the chain tooth. -6 / ℃, The rigid support material is stainless steel, titanium alloy, or surface-hardened aluminum alloy.

10. A waterproof zipper with glue filling according to claim 1, characterized in that, The center line is made of polyester.

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