Zipper puller for single-face double-layer nylon zipper

Abstract

The utility model provides a zipper puller for a single-sided double-layer nylon zipper. The device comprises a top plate, a bottom plate, a zipper dividing guide plate, two upper wing plates, two lower wing plates, an upper base heel, a lower base heel and an upper puller nose bridge, a chain dividing guide plate is arranged between one end of the top plate and one end of the bottom plate, an upper base heel and a lower base heel are arranged on the inner side face of the top plate and the inner side face of the bottom plate respectively and connected with the chain dividing guide plate, and the upper wing protection plate and the lower wing protection plate which are located on the same side correspond to each other and are spaced by a certain distance. And the height of the lower protective wing plate is between 3.4 mm and 6.6 mm. The zipper head for the single-face double-layer nylon zipper solves the problems that due to the fact that a wing protection plate of a traditional anti-explosion zipper head is insufficient in height, chains of the single-face double-layer nylon zipper cannot be meshed better, teeth of the chains of the single-face double-layer nylon zipper are staggered, pulling resistance is increased, and the zipper head is not prone to being damaged. And the anti-explosion effect of the whole chain of the single-sided double-layer nylon zipper is reduced.

Description

Technical Field

[0001] This utility model relates to the field of zipper head technology, and in particular to a zipper head for single-sided double-layer nylon zippers. Background Technology

[0002] Because single-sided double-layer nylon zippers have a structure with two layers of chains and a small middle layer of fabric on one side, traditional explosion-proof zipper heads, when used with single-sided double-layer nylon zippers, suffer from insufficient height of the protective wing plates. As a result, the chains of the single-sided double-layer nylon zipper cannot mesh properly, leading to chain misalignment, increased pulling resistance, and reduced overall explosion-proof performance. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a zipper head for single-sided double-layer nylon zippers, thus resolving the problems existing in the prior art.

[0004] According to a first aspect of the present invention, a zipper head for a single-sided double-layer nylon zipper is provided, comprising: a top plate, a bottom plate, a chain guide plate, two upper protective wing plates, two lower protective wing plates, an upper base heel, a lower base heel, and an upper zipper nose bridge;

[0005] The top plate and bottom plate are arranged in parallel and corresponding to each other. The outer side of the top plate is provided with an upper pull head nose bridge. A chain guide plate is provided between one end of the top plate and one end of the bottom plate. The inner sides of the top plate and the bottom plate are respectively provided with upper base and lower base, and both upper base and lower base are connected to the chain guide plate. Upper guard wing plates extend vertically downward from both sides of the top plate, and lower guard wing plates extend vertically upward from both sides of the bottom plate. The upper guard wing plates and lower guard wing plates on the same side are arranged in parallel and corresponding to each other with a certain distance between them. The height of the lower guard wing plate is between 3.4mm and 6.6mm.

[0006] The inner sides of the top plate, bottom plate, chain guide plate, upper wing plate, lower wing plate, upper base and lower base located on the same side have space to accommodate the chain of a single-sided double-layer nylon zipper passing through.

[0007] Optionally, the chain guide plate includes a first arc surface, a second arc surface, a third arc surface and a fourth arc surface, the first arc surface and the second arc surface are mirror images of each other, the first arc surface and the third arc surface are connected, the third arc surface and the fourth arc surface are mirror images of each other, and the second arc surface and the fourth arc surface are connected.

[0008] The angle formed by the tangent of the first arc surface and the center line segment is 1.5-2.5°, and the angle of the third arc surface is 25.5-26.5°.

[0009] Alternatively, the angle formed by the tangent of the first arc surface and the center line segment is 2.5-3.5°, and the angle of the third arc surface is 24.5-25.5°;

[0010] Alternatively, the angle formed by the tangent of the first arc surface and the center line segment is 3.5-4.5°, and the angle of the third arc surface is 24.5-25.5°.

[0011] Optionally, the upper base includes a fifth arc surface, a first vertical surface, a sixth arc surface, and a second vertical surface. The two ends of the fifth arc surface are connected to the third arc surface and the first vertical surface, respectively. The two ends of the sixth arc surface are connected to the fourth arc surface and the second vertical surface, respectively. The fifth arc surface and the sixth arc surface are mirror images of each other, and the first vertical surface and the second vertical surface are symmetrically arranged.

[0012] The curvature of the fifth arc is 15 degrees;

[0013] The distance between the first vertical surface and the inner surface of the upper protective wing plate on the same side is 3.2 mm, 3.45 mm, or 4.95 mm.

[0014] Optionally, the height of the upper base is 0.45mm or 0.5mm.

[0015] Optionally, the distance between the inner side of the top plate and the inner side of the bottom plate is 4.8mm, 5.3mm, or 6.9mm.

[0016] Optionally, the distance between the upper and lower wing plates on the same side is 1.2 mm or 1.3 mm.

[0017] Optionally, the lower wingplate is curved, with an arc of R5°, R7°, or R10°.

[0018] Optionally, the thickness of the top plate is 1.6 mm, 1.85 mm or 2.1 mm.

[0019] Optionally, the thickness of the base plate is 1.5mm or 1.8mm.

[0020] Optionally, it also includes a pull-down nose bridge, which is provided on the outer side of the base plate.

[0021] This invention discloses a zipper head for a single-sided double-layer nylon zipper. The zipper head consists of a top plate and a bottom plate arranged in parallel and corresponding configurations. An upper zipper nose is provided on the outer surface of the top plate. A chain guide plate is located between one end of the top plate and one end of the bottom plate. Upper and lower base supports are provided on the inner surfaces of the top and bottom plates, respectively, and both are connected to the chain guide plate. Upper protective wing plates extend vertically downwards from both sides of the top plate, and lower protective wing plates extend vertically upwards from both sides of the bottom plate. The upper and lower protective wing plates on the same side are arranged correspondingly and are spaced apart. The height of the lower protective wing plate is between 3.4mm and 6.6mm.

[0022] The inner sides of the top plate, bottom plate, chain guide plate, upper wing plate, lower wing plate, upper base, and lower base, all located on the same side, are designed to accommodate the chain of a single-sided double-layer nylon zipper on one side. Therefore, the upper and lower wing plates in this application better protect the single-sided double-layer nylon zipper chain from the side, allowing for better meshing of the superimposed double layers on both sides. The increased height of the upper wing plate effectively reduces misalignment and improves the overall explosion-proof performance of the single-sided double-layer nylon zipper. Thus, this invention solves the technical problem that the insufficient height of the wing plates in traditional explosion-proof zipper heads leads to poor chain meshing in single-sided double-layer nylon zippers, resulting in misalignment, increased pulling resistance, and reduced overall explosion-proof performance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a zipper head for a single-sided double-layer nylon zipper according to the present invention;

[0024] Figure 2 This is a front view of a first shape of a zipper head for a single-sided double-layer nylon zipper according to the present invention;

[0025] Figure 3 An internal view of a first shape of a zipper head for a single-sided double-layer nylon zipper according to the present invention;

[0026] Figure 4 A side view of a first shape of a zipper head for a single-sided double-layer nylon zipper according to the present invention;

[0027] Figure 5 This is a front view of a second shape of a zipper head for a single-sided double-layer nylon zipper according to the present invention;

[0028] Figure 6 An internal view of a second shape of a zipper head for a single-sided double-layer nylon zipper according to the present invention;

[0029] Figure 7 A side view of a second shape of a zipper head for a single-sided double-layer nylon zipper according to the present invention;

[0030] Figure 8 This is a front view of a third shape of a zipper head for a single-sided double-layer nylon zipper according to the present invention;

[0031] Figure 9 An internal view of a third shape of a zipper head for a single-sided double-layer nylon zipper according to the present invention;

[0032] Figure 10 This is a side view of a third shape of the zipper head for a single-sided double-layer nylon zipper according to the present invention.

[0033] List of reference numerals in the attached diagram:

[0034] 1. Top plate; 2. Bottom plate; 3. Chain guide plate; 3-1. First arc surface; 3-2. Second arc surface; 3-3. Third arc surface; 3-4. Fourth arc surface; 4. Upper wing plate; 5. Lower wing plate; 6. Upper base; 6-1. Fifth arc surface; 6-2. First vertical surface; 6-3. Sixth arc surface; 6-4. Second vertical surface; 7. Lower base; 8. Upper pull head nose bridge; 9. Lower pull head nose bridge. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0036] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "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 utility model 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 utility model.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] Reference Figures 1 to 10 The present invention provides a zipper head for a single-sided double-layer nylon zipper, comprising: a top plate 1, a bottom plate 2, a chain guide plate 3, two upper protective wing plates 4, two lower protective wing plates 5, an upper base heel 6, a lower base heel 7, and an upper zipper nose bridge 8.

[0039] The top plate 1 and the bottom plate 2 are arranged in parallel and corresponding to each other. The outer side of the top plate 1 is provided with an upper pull head nose bridge 8. A chain guide plate 3 is provided between one end of the top plate 1 and one end of the bottom plate 2. The inner sides of the top plate 1 and the bottom plate 2 are respectively provided with an upper base 6 and a lower base 7, and both the upper base 6 and the lower base 7 are connected to the chain guide plate 3. The two sides of the top plate 1 extend vertically downward with upper protective wing plates 4, and the two sides of the bottom plate 2 extend vertically upward with lower protective wing plates 5. The upper protective wing plates 4 and the lower protective wing plates 5 on the same side are arranged in parallel and corresponding to each other with a certain distance between them. The height of the lower protective wing plate 5 is between 3.4mm and 6.6mm.

[0040] The inner sides of the top plate 1, the bottom plate 2, the side of the chain guide plate 3, the inner sides of the upper guard plate 4, the lower guard plate 5, the inner sides of the upper base 6 and the lower base 7, located on the same side, have space to accommodate the chain of a single-sided double-layer nylon zipper passing through.

[0041] The height limitation of the lower guard plate 5 allows for better interlocking of the overlapping double layers on both sides. With the increased height of the upper guard plate, misalignment is effectively reduced, improving the overall explosion-proof effect of the single-sided double-layer nylon zipper. If the height of the lower guard plate 5 is not within this range, there is a risk of the zipper bursting.

[0042] This utility model provides a zipper head for a single-sided double-layer nylon zipper. A top plate 1 and a bottom plate 2 are arranged in parallel and corresponding configurations. An upper zipper nose bridge 8 is provided on the outer surface of the top plate 1. A chain guide plate 3 is provided between one end of the top plate 1 and one end of the bottom plate 2. Upper base heels 6 and lower base heels 7 are provided on the inner surfaces of the top plate 1 and the bottom plate 2, respectively, and both upper base heels 6 and lower base heels 7 are connected to the chain guide plate 3. Upper protective wing plates 4 extend vertically downwards from both sides of the top plate 1, and lower protective wing plates 5 extend vertically upwards from both sides of the bottom plate 2. The upper protective wing plates 4 and lower protective wing plates 5 on the same side are arranged correspondingly and have a certain distance between them. The height of the lower protective wing plate 5 is between 3.4mm and 6.6mm. Therefore, the upper protective wing plate 4 and the lower protective wing plate 5 in this application better protect the single-sided double-layer nylon zipper chain from the side, allowing the overlapping double layers to mesh better on both sides. The increased height of the upper protective wing plate 4 effectively reduces misalignment and improves the overall explosion-proof effect of the single-sided double-layer nylon zipper. Thus, this utility model solves the technical problem that the traditional explosion-proof zipper head's protective wing plate is too low, resulting in poor chain meshing, misalignment, increased pulling resistance, and reduced overall explosion-proof effect of the single-sided double-layer nylon zipper chain.

[0043] Reference Figures 2 to 10 Optionally, the chain guide plate 3 includes a first arc surface 3-1, a second arc surface 3-2, a third arc surface 3-3 and a fourth arc surface 3-4. The first arc surface 3-1 and the second arc surface 3-2 are mirror images of each other. The first arc surface 3-1 and the third arc surface 3-3 are connected. The third arc surface 3-3 and the fourth arc surface 3-4 are mirror images of each other. The second arc surface 3-2 and the fourth arc surface 3-4 are connected.

[0044] The angle formed by the tangent of the first arc surface 3-1 and the center line segment is 1.5-2.5°, and the angle of the third arc surface 3-3 is 25.5-26.5°.

[0045] Alternatively, the angle formed by the tangent of the first arc surface 3-1 and the center line segment is 2.5-3.5°, and the angle of the third arc surface 3-3 is 24.5-25.5°;

[0046] Alternatively, the angle formed by the tangent of the first arc surface 3-1 and the center line segment is 3.5-4.5°, and the angle of the third arc surface 3-3 is 24.5-25.5°.

[0047] Wherein, when the angle formed by the tangent of the first arc surface 3-1 and the center line segment is 1.5-2.5°, and the angle of the third arc surface 3-3 is 25.5-26.5°, this application is a single-sided double-layer explosion-proof No. 7 zipper head. The limitation of the angle formed by the tangent of the first arc surface 3-1 and the third arc surface 3-3 in the above-mentioned chain guide plate 3 and the center line segment can make the splitting and joining of the single-sided double-layer nylon zipper reach the ideal angle, making the splitting and joining of the chain smoother and the pulling feel more comfortable;

[0048] When the angle formed by the tangent of the first arc surface 3-1 and the center line segment is 2.5-3.5°, and the angle of the third arc surface 3-3 is 24.5-25.5°, this application is a single-sided double-layer explosion-proof No. 8 zipper head. The limitation of the angle formed by the tangent of the first arc surface 3-1 and the third arc surface 3-3 in the above-mentioned chain guide plate 3 and the center line segment can make the splitting and joining of the single-sided double-layer nylon zipper reach the ideal angle, making the splitting and joining of the chain smoother and the pulling feel more comfortable.

[0049] When the angle formed by the tangent of the first arc surface 3-1 and the center line segment is 3.5-4.5°, and the angle of the third arc surface 3-3 is 24.5-25.5°, this application is a single-sided double-layer explosion-proof No. 10 zipper head (with lock hole). The limitation of the angle formed by the tangent of the first arc surface 3-1 and the third arc surface 3-3 in the above-mentioned chain guide plate 3 and the center line segment can make the splitting and joining of the single-sided double-layer nylon zipper reach the ideal angle, making the splitting and joining of the chain smoother and the pulling feel more comfortable.

[0050] Reference Figures 2 to 10 Optionally, the upper base 6 includes a fifth arc surface 6-1, a first vertical surface 6-2, a sixth arc surface 6-3, and a second vertical surface 6-4. The two ends of the fifth arc surface 6-1 are connected to the third arc surface 3-3 and the first vertical surface 6-2, respectively. The two ends of the sixth arc surface 6-3 are connected to the fourth arc surface 3-4 and the second vertical surface 6-4, respectively. The fifth arc surface 6-1 and the sixth arc surface 6-3 are mirror images of each other, and the first vertical surface 6-2 and the second vertical surface 6-4 are symmetrically arranged.

[0051] The radius of the fifth arc surface 6-1 is 15 degrees;

[0052] The distance between the first vertical surface 6-2 and the inner surface of the upper protective wing plate 4 located on the same side is 3.2mm, 3.45mm, or 4.95mm.

[0053] Among them, the fifth arc surface 6-1 has an arc of 15 degrees, which allows the single-sided double-layer nylon zipper to split smoothly while preventing the zipper from bursting.

[0054] When the distance between a vertical surface 6-2 and the inner side of the upper protective wing plate 4 located on the same side is 3.2mm, this application is a single-sided double-layer explosion-proof No. 7 zipper head. The above limitation can make the single-sided double-layer nylon zipper chain split smoothly, while preventing the chain from bursting.

[0055] When the distance between a vertical surface 6-2 and the inner side of the upper protective wing plate 4 located on the same side is 3.45mm, this application is a single-sided double-layer explosion-proof No. 8 zipper head. The above limitation can make the single-sided double-layer nylon zipper split smoothly, while preventing the chain from bursting.

[0056] When the distance between a vertical surface 6-2 and the inner side of the upper protective wing plate 4 located on the same side is 4.95mm, this application is a single-sided double-layer explosion-proof No. 10 zipper head (with lock hole). The above limitation can make the single-sided double-layer nylon zipper split smoothly, while preventing the chain from bursting.

[0057] Reference Figures 2 to 10 Optionally, the height of the upper base and 6 is 0.45mm or 0.5mm.

[0058] When the height of the upper base 6 is 0.45mm, this application is a single-sided double-layer explosion-proof No. 7 zipper head. The above limitation increases the tightness of the single-sided double-layer nylon zipper and the zipper head of this application, preventing the chain from bursting.

[0059] When the height of the upper base and 6 is 0.5mm, this application has a single-sided double-layer explosion-proof No. 8 zipper head and a single-sided double-layer explosion-proof No. 10 zipper head (with lock hole). The above limitation increases the tightness of the single-sided double-layer nylon zipper and the zipper head of this application, preventing the chain from bursting.

[0060] Reference Figures 2 to 10 Optionally, the distance between the inner side of the top plate 1 and the inner side of the bottom plate 2 is 4.8mm, 5.3mm, or 6.9mm.

[0061] When the distance between the inner side of the top plate 1 and the inner side of the bottom plate 2 is 4.8mm, this application is a single-sided double-layer explosion-proof No. 7 zipper head. The above-mentioned distance limit can make the zipper press within this distance so that it does not burst and the opening and closing is smoother.

[0062] When the distance between the inner side of the top plate 1 and the inner side of the bottom plate 2 is 5.3mm, this application is a single-sided double-layer explosion-proof No. 8 zipper head. The above-mentioned distance limit can make the zipper press within this distance so that it does not burst and the opening and closing is smoother.

[0063] When the distance between the inner side of the top plate 1 and the inner side of the bottom plate 2 is 6.9mm, this application is a single-sided double-layer explosion-proof No. 10 zipper head (with lock hole). The above-mentioned distance limit can make the zipper press within this distance so that it does not burst and the opening and closing is smoother.

[0064] Reference Figures 2 to 10 Optionally, the distance between the upper wing plate 4 and the lower wing plate 5 located on the same side is 1.2 mm or 1.3 mm.

[0065] When the distance between the upper wing plate 4 and the lower wing plate 5 located on the same side is 1.2mm, this application is a single-sided double-layer explosion-proof No. 7 zipper head. The limitation of the distance between the upper wing plate 4 and the lower wing plate 5 can form a passage between the upper wing plate 4 and the lower wing plate 5, allowing the single tooth fabric seam of the single-sided double-layer nylon zipper to pass through the chain guide plate 3 and then close the chain, making the zipper bite tighter and preventing the chain from bursting.

[0066] When the distance between the upper wing plate 4 and the lower wing plate 5 located on the same side is 1.3mm, this application is a single-sided double-layer explosion-proof No. 8 zipper head and a single-sided double-layer explosion-proof No. 10 zipper head (with lock hole). The limitation of the distance between the upper wing plate 4 and the lower wing plate 5 can form a passage between the upper wing plate 4 and the lower wing plate 5, allowing the single tooth fabric seam of the single-sided double-layer nylon zipper to pass through the chain guide plate 3 and then close the chain, making the zipper bite more tightly and preventing the chain from bursting.

[0067] Reference Figures 2 to 10 Optionally, the lower wing plate 5 is arc-shaped, and the arc of the lower wing plate 5 is R5°, R7° or R10°.

[0068] When the curvature of the lower wing plate 5 is R5°, this application is a single-sided double-layer explosion-proof No. 7 zipper head. The limitation of the curvature of the lower wing plate 5 can make the split and join chains reach the ideal angle, making the split and join chains smoother and the pulling feel more comfortable.

[0069] When the curvature of the lower wing plate 5 is R7°, this application is a single-sided double-layer explosion-proof No. 8 zipper head. The limitation of the curvature of the lower wing plate 5 can make the split and join chains reach the ideal angle, making the split and join chains smoother and the pulling feel more comfortable.

[0070] When the curvature of the lower guard plate 5 is R10°, this application is a single-sided double-layer explosion-proof No. 10 zipper head (with lock hole). The limitation of the curvature of the lower guard plate 5 can make the split and join chains reach the ideal angle, making the split and join chains smoother and the pulling feel more comfortable.

[0071] Reference Figures 2 to 10 Optionally, the thickness of the top plate 1 is 1.6 mm, 1.85 mm or 2.1 mm.

[0072] When the thickness of the top plate 1 is 1.6mm, this application is a single-sided double-layer explosion-proof No. 7 zipper pull. The limitation on the thickness of the top plate 1 increases the tensile and explosion-proof strength of the zipper pull.

[0073] When the thickness of the top plate 1 is 1.85mm, this application is a single-sided double-layer explosion-proof No. 8 zipper head. The above-mentioned limitation on the thickness of the top plate 1 increases the tensile and explosion-proof strength of the zipper head.

[0074] When the thickness of the top plate 1 is 2.1mm, this application is a single-sided double-layer explosion-proof No. 10 zipper head (with lock hole). The above-mentioned limitation on the thickness of the top plate 1 increases the tensile and explosion-proof strength of the zipper head.

[0075] Reference Figures 2 to 10 Optionally, the thickness of the base plate 2 is 1.5mm or 1.8mm.

[0076] When the thickness of the base plate 2 is 1.5mm, this application is a single-sided double-layer explosion-proof No. 7 zipper head. The limitation on the thickness of the base plate 2 increases the tensile and explosion-proof strength of the zipper head.

[0077] When the thickness of the base plate 2 is 1.8mm, this application provides a single-sided double-layer explosion-proof No. 8 zipper head and a single-sided double-layer explosion-proof No. 10 zipper head (with lock hole). The aforementioned limitation on the thickness of the base plate 2 increases the tensile and explosion-proof strength of the zipper head.

[0078] Reference Figures 2 to 10 Optionally, it also includes a pull-down nose bridge 9, which is provided on the outer side of the base plate 2.

[0079] This application can be applied to zipper heads that are reversed, in which case the nose bridge 9 of the pull tab can be facing upwards.

[0080] It should be noted that not all steps and modules in the above processes and system structure diagrams are mandatory; some steps or modules can be omitted as needed. The execution order of each step is not fixed and can be adjusted as required. The system structure described in the above embodiments can be a physical structure or a logical structure. That is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or they may be jointly implemented by certain components in multiple independent devices.

[0081] In the above embodiments, the hardware modules can be implemented mechanically or electrically. The present invention has been described and illustrated in detail above with reference to the accompanying drawings and preferred embodiments. However, the present invention is not limited to these disclosed embodiments. Based on the above embodiments, those skilled in the art will understand that more embodiments of the present invention can be obtained by combining the code review methods in the different embodiments described above, and these embodiments are also within the protection scope of the present invention.

Claims

1. A slider for a single-sided double-layer nylon zipper, characterized by, The utility model relates to a kind of double-layer nylon zipper chain guiding plate, including: Top plate (1), bottom plate (2), split chain guide plate (3), two upper wing plates (4), two lower wing plates (5), upper base (6), lower base (7) and upper pull nose bridge (8); The top plate (1) and the bottom plate (2) are correspondingly and parallelly arranged, the outer side of the top plate (1) is provided with the upper pull nose bridge (8), the one end of the top plate (1) and the one end of the bottom plate (2) are provided with the split chain guide plate (3), the inner side of the top plate (1) and the bottom plate (2) are respectively provided with the upper base (6) and the lower base (7), and the upper base (6) and the lower base (7) are connected with the split chain guide plate (3), the two sides of the top plate (1) are respectively vertically extended downward to have the upper wing plate (4), the two sides of the bottom plate (2) are respectively vertically extended upward to have the lower wing plate (5), the upper wing plate (4) and the lower wing plate (5) on the same side are correspondingly arranged and have a spacing therebetween, and the height of the lower wing plate (5) is between 3.4mm and 6.6mm. The inner side of the top plate (1), the inner side of the bottom plate (2), the side of the split chain guide plate (3), the inner side of the upper wing plate (4), the inner side of the lower wing plate (5), the inner side of the upper base (6) and the inner side of the lower base (7) on the same side have a space for accommodating the passing of one side chain of the single-face double-layer nylon zipper.

2. The slider for a single-face double-layer nylon zipper according to claim 1, wherein The split chain guide plate (3) includes a first arc surface (3-1), a second arc surface (3-2), a third arc surface (3-3) and a fourth arc surface (3-4), the first arc surface (3-1) and the second arc surface (3-2) are mirror image arranged, the first arc surface (3-1) is connected with the third arc surface (3-3), the third arc surface (3-3) and the fourth arc surface (3-4) are mirror image arranged, and the second arc surface (3-2) is connected with the fourth arc surface (3-4). The angle formed by the tangent of the first arc surface (3-1) and the center line segment is 1.5-2.5°, and the angle of the third arc surface (3-3) is 25.5-26.5°. Or, the angle formed by the tangent of the first arc surface (3-1) and the center line segment is 2.5-3.5°, and the angle of the third arc surface (3-3) is 24.5-25.5°. Or, the angle formed by the tangent of the first arc surface (3-1) and the center line segment is 3.5-4.5°, and the angle of the third arc surface (3-3) is 24.5-25.5°.

3. The fastener chain for a single-sided double-layer nylon fastener according to claim 2, wherein The upper heel (6) comprises a fifth arc surface (6-1), a first vertical surface (6-2), a sixth arc surface (6-3) and a second vertical surface (6-4), two ends of the fifth arc surface (6-1) are connected with the third arc surface (3-3) and the first vertical surface (6-2) respectively, two ends of the sixth arc surface (6-3) are connected with the fourth arc surface (3-4) and the second vertical surface (6-4) respectively, the fifth arc surface (6-1) and the sixth arc surface (6-3) are mirror image arranged with each other, and the first vertical surface (6-2) and the second vertical surface (6-4) are symmetrically arranged with each other. The fifth arc surface (6-1) has an arc of 15 degrees. The distance between the first vertical surface (6-2) and the inner side surface of the upper wing plate (4) on the same side is 3.2mm or 3.45mm or 4.95mm.

4. The fastener chain for a single-sided double-layer nylon fastener according to claim 3, wherein The height of the upper heel (6) is 0.45mm or 0.5mm.

5. The fastener chain for a single-sided double-layer nylon fastener according to claim 4, wherein The distance between the inner side surface of the top plate (1) and the inner side surface of the bottom plate (2) is 4.8mm or 5.3mm or 6.9mm.

6. The fastener chain for a single-sided double-layer nylon fastener according to claim 5, wherein The distance between the upper wing plate (4) and the lower wing plate (5) on the same side is 1.2mm or 1.3mm.

7. The fastener chain for a single-sided double-layer nylon fastener according to claim 6, wherein The lower wing plate (5) is arc-shaped, and the lower wing plate (5) has an arc of R5°, R7° or R10°.

8. The fastener chain for a single-sided double-layer nylon fastener according to claim 7, wherein The thickness of the top plate (1) is 1.6mm, 1.85mm or 2.1mm.

9. The slider for a single-face double-layer nylon zipper according to claim 8, wherein The thickness of the bottom plate (2) is 1.5mm or 1.8mm.

10. The slider for a single-face double-layer nylon zipper according to claim 1, wherein The outer side surface of the bottom plate (2) is provided with a lower pull nose bridge (9). The outer side surface of the bottom plate (2) is provided with a lower pull nose bridge (9).

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