Simple pull-tab structure

Abstract

This utility model relates to the field of zipper-related accessories, specifically to a simplified zipper pull structure that solves the problem of insufficient simplicity in zipper pull structures. It includes a pull cord and a zipper pull body. The zipper pull body has a hollow structure with a base and two branching extension ends extending from the base. The two extension ends are symmetrically arranged and separated from each other, and the inner diameter of each extension end gradually decreases from the base end to its free end. This utility model is applicable to zipper components in clothing and related products.

Description

Technical Field

[0001] This utility model relates to the field of zipper-related accessories, specifically to a simple zipper pull structure. Background Technology

[0002] The zipper pull (also known as the zipper tab or zipper tail) is the core operating component of a zipper, part of the zipper head, and is used to control the engagement and disengagement of the zipper teeth. In sportswear on the market, to achieve easy pulling and match the style of the clothing category, some zipper pulls use a structure with a pull cord, such as the structure shown in Chinese Patent CN2415646Y. This cord-type zipper handle consists of a pull cord and a handle body. The handle body is a two-color flat body with a concave center. Raised strips are provided above and below the concave center, and the pull cord is fixed to the upper part of the handle body. This illustrates the basic structure of existing zipper pulls with pull cords.

[0003] This type of pull tab is formed by directly integrating the pull cord into the handle body during the injection molding process. This type of pull tab is not simple in design and has limited functionality. Summary of the Invention

[0004] Therefore, this utility model provides a simple pull tab structure, which solves the problem that the pull tab structure is not simple enough.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A simple pull tab structure includes a pull cord and a pull tab body. The pull tab body is a hollow structure with a base and two branching extension ends extending from the base. The two extension ends are symmetrically arranged and separated from each other. The inner diameter of each extension end gradually decreases from one end of the base to its free end.

[0007] Preferably, the free end of each of the extension ends is provided with an angled opening.

[0008] Preferably, the end of the inner cavity of the base is provided with a protrusion for limiting the pull rope.

[0009] Preferably, the end of the base is arc-shaped.

[0010] Preferably, the pull rope has a first rope end and a second rope end that extend from two extension ends respectively, and an intermediate rope portion connecting the first rope end and the second rope end, the intermediate rope portion being embedded in the base.

[0011] Preferably, the pull cords are a first cord portion and a second cord portion, which are respectively inserted into the base and exited from the extension end and are secured on the pull tab body.

[0012] Preferably, the material of the pull tab body is PP, PA, or TPE.

[0013] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0014] The pull tab structure shown in this technical solution features a very simple design. The pull tab body adopts a hollow structure, with the base and extension end forming an integrated structure. The overall shape is simple, reducing the difficulty of mold design during injection molding, which can significantly reduce production costs and improve production efficiency. The gradually changing inner diameter design of the extension end forms a natural locking structure, achieving the function of fixing the pull cord without additional complex components, thus simplifying the assembly process.

[0015] The structure with a gradually decreasing inner diameter at the extension end creates a gradient constraint force. After the pull cord is inserted, the frictional resistance generated by the cross-sectional contraction effectively prevents the pull cord from slipping or falling off. It is especially suitable for high-frequency pulling scenarios (such as bag zippers). The hollow inner cavity at the base provides ample space for the pull cord to pass through, avoiding compression and deformation, and ensuring smooth movement of the pull cord. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the pull tab body according to Embodiment 1 of this utility model.

[0017] Figure 2 This is a cross-sectional structural diagram showing the connection between the pull tab body and the pull rope in Embodiment 1 of this utility model.

[0018] Figure 3 This is a cross-sectional view of the connection between the pull tab body and the pull rope in Embodiment 2 of this utility model.

[0019] Reference numerals: 1. Pull tab body; 11. Base; 12. Extension end; 13. Bevel; 14. Protrusion; 2. Pull cord; 21. First cord end; 22. Second cord end; 23. Middle cord section; 2a. First cord section; 2b. Second cord section. Detailed Implementation

[0020] The following will describe the implementation of this utility model in detail with reference to specific embodiments, so that the process of how this utility model uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Example 1

[0021] refer to Figure 1 and Figure 2A simple pull tab structure is disclosed, comprising a pull cord 2 and a pull tab body 1. The pull tab body 1 is a hollow structure, having a base 11 and two branching extension ends 12 extending from the base 11. The two extension ends 12 are symmetrically arranged and separated from each other, and the inner diameter of each extension end 12 gradually decreases from one end of the base 11 to its free end. The pull tab structure shown in this technical solution has a very simple design. The pull tab body 1 adopts a hollow structure design, and the base 11 and the extension ends 12 form an integral structure. The overall shape is simple, the mold design is easy during injection molding, and the production cost can be significantly reduced and the production efficiency improved. The gradual change in the inner diameter of the extension ends 12 forms a natural locking structure, which can realize the fixing function of the pull cord 2 without additional complex components, simplifying the assembly process.

[0022] The structure with a gradually decreasing inner diameter of the extension end 12 forms a gradient constraint force. After the pull rope 2 is inserted, the frictional resistance is generated due to the cross-sectional contraction, which effectively prevents the pull rope 2 from sliding or falling off. It is especially suitable for high-frequency pulling scenarios (such as bag zippers). The hollow inner cavity of the base 11 provides sufficient space for the pull rope 2 to pass through, avoids compression and deformation, and ensures smooth movement of the pull rope 2.

[0023] In this embodiment, a single pull cord 2 is designed. The pull cord 2 has a first cord end 21 and a second cord end 22 extending from two extension ends 12, respectively, and a middle cord portion 23 connecting the first cord end 21 and the second cord end 22. The middle cord portion 23 is embedded in the base 11. The single pull cord 2 passes through the base 11 and the two extension ends 12, which is suitable for scenarios requiring symmetrical pulling force (such as double-ended zippers). The middle cord portion 23 being embedded in the base 11 avoids the pull cord 2 being exposed, forming a complete pull tab structure with an aesthetically pleasing appearance.

[0024] Structurally, the end of the base 11 is arc-shaped. This is an ergonomically optimized design; the arc-shaped transition at the end of the base 11 eliminates right-angled edges, eliminating any stinging sensation when held by the user, making it particularly suitable for scenarios requiring frequent skin contact (such as clothing zippers). The arc-shaped structure also disperses stress concentration, improving the fatigue resistance of the pull tab body 1 under repeated bending conditions.

[0025] Structurally, the free ends of each extension end 12 are provided with bevels 13. Here, the bevel 13 refers to the fact that the end of the extension end 12 is not straight, giving the center of the entire pull tab body 1 a certain protruding shape. This design improves the ease of threading the rope; the bevel 13 design at the free end of the extension end 12 reduces the angular resistance when threading the rope 2, lowering the difficulty for operators, and is especially suitable for automated assembly processes. The bevel 13 structure also prevents fiber breakage at the end of the rope 2 due to sharp edge cutting, extending the service life of the rope 2.

[0026] In this embodiment, the end of the inner cavity of the base 11 is provided with a protrusion 14 for limiting the pull rope 2. The protrusion 14 is provided on both sides of the end of the inner cavity of the base 11. The protruding structure at the end of the inner cavity of the base 11 is a strip-shaped protrusion (or a ring-shaped boss or a hemispherical protrusion), which can mechanically interlock with the surface of the pull rope 2 to prevent the pull rope 2 from dislodging from the base 11 when pulled violently. The protrusion 14 also serves as a guide, ensuring that the pull rope 2 travels along a preset path and avoiding jamming or wear caused by deviation.

[0027] The pull tab body 1 is made of commonly used engineering plastics such as PP, PA, or TPE, balancing performance and cost.

[0028] Polypropylene (PP) is chosen because of its low density and light weight; strong chemical resistance, making it suitable for humid or acidic environments; low injection shrinkage and excellent dimensional stability, making it suitable for pull tabs that require frequent bending, such as clothing zippers, and it is not prone to cracking after long-term use.

[0029] When polyamide (PA, nylon) is selected, it has excellent wear resistance and high tensile strength; its self-lubricating properties can reduce friction loss of the pull rope, making it suitable for high-load scenarios and able to withstand large tensile forces without deformation;

[0030] When thermoplastic elastomers (TPEs) are selected, the Shore hardness is adjustable (60A-90A), combining the elasticity of rubber with the rigidity of plastic; it has good low-temperature toughness (remains flexible even at -40℃), making it suitable for consumer products that require a soft touch (such as handbag pull tabs), thus improving the user experience. Example 2

[0031] refer to Figure 3 Compared to Embodiment 1, the pull ropes 2 are divided into a first rope portion 2a and a second rope portion 2b. The first rope portion 2a and the second rope portion 2b are respectively inserted into the base 11 and exited from the extension end 12 and are locked onto the pull tab body 1. This design is another application of the pull tab in this technical solution. The two independent pull ropes 2 are respectively inserted into the two extension ends 12, and the pull tab body 1 acts as a limiting relay, which can be applied to scenarios that require force distribution control (such as tent adjustment straps). In this case, the pull tab has both guiding and fixing functions, breaking through the single purpose of traditional pull tabs.

[0032] This technical solution features a simplified structure, achieving a balance between functionality, cost, and user experience in the pull tab design. Functionally, the extension end 12 with locking mechanism, the protrusion 14 with limiting mechanism, and the arc transition ensure reliable fixation and smooth operation of the pull cord 2. In terms of production, the hollow integrated structure reduces injection molding difficulty, and the high fluidity of materials such as PP / PA further improves the yield rate. In terms of user experience, details such as the beveled opening 13 for threading the cord, the arc grip, and the skin-friendly material enhance the product's added value, expanding its application scenarios from traditional zippers to multiple fields such as industry and outdoor applications.

[0033] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A simple pull tab structure, characterized by: It includes a pull cord (2) and a pull tab body (1). The pull tab body (1) is a hollow structure with a base (11) and two branch extension ends (12) extending from the base (11). The two extension ends (12) are symmetrically arranged and separated from each other. The inner diameter of each extension end (12) gradually decreases from one end of the base (11) to its free end.

2. The simplified pull-tab structure according to claim 1, characterized in that: The free end of each of the extension ends (12) is provided with a bevel (13).

3. The simplified pull-tab structure according to claim 1, characterized in that: The end of the inner cavity of the base (11) is provided with a protrusion (14) for limiting the pull rope (2).

4. The simplified pull-tab structure according to claim 1, characterized in that: The end of the base (11) is arc-shaped.

5. A simplified pull-tab structure according to any one of claims 1-4, characterized in that: The pull rope (2) has a first rope end (21) and a second rope end (22) that are respectively extended from two extension ends (12), and an intermediate rope portion (23) connecting the first rope end (21) and the second rope end (22), the intermediate rope portion (23) being embedded in the base (11).

6. A simplified pull-tab structure according to any one of claims 1-4, characterized in that: The pull rope (2) consists of a first rope portion (2a) and a second rope portion (2b), which are inserted through the base portion (11) and exited through the extension end (12) and are locked onto the pull tab body (1).

7. A simplified pull-tab structure according to any one of claims 1-4, characterized in that: The pull tab body (1) is made of PP, PA or TPE material.

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