Lower Zipper Stop Hook Assembly for Guided Self-Locking
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Solution Overview
Problem
Conventional zippers require precise control for the depth of pin insertion into the box to ensure proper interlocking of zipper teeth, which is inconvenient for users.
Innovation Solution
A zipper lower stop design featuring a hook-shaped structure on the plane member and a guide channel in the bottom member, allowing for axial alignment and rotation to secure the stop components without manual adjustment during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional lower stop with pin and box is used, then the zipper teeth can be joined, but precise manual control of pin insertion depth is required which is inconvenient for users
Solution Approach 1:
The lower stop structure performs self-alignment and self-locking through its geometric design. The plane member cylinder automatically aligns with the main groove, and the hook structure automatically locks into the guide channel when the plane member rotates, eliminating the need for manual precision control during assembly
Solution Approach 2:
The asymmetric hook structure with its specific geometric shape creates a unidirectional locking mechanism that naturally guides the assembly process. The hook can only engage properly when the plane member rotates to the correct orientation, providing automatic positioning without manual intervention
2Reliability
If the lower stop requires precise manual alignment, then proper interlocking can be achieved, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The lower stop components are pre-designed with built-in guiding features (main groove, guide channel, oblique surfaces) that automatically perform the alignment function during assembly. This preliminary structural preparation eliminates the need for complex manual alignment procedures
Solution Approach 2:
The guide channel acts as an intermediary element between the hook and the main groove, facilitating smooth engagement and rotation. The oblique guiding surfaces serve as mediators that convert axial movement into rotational motion, simplifying the assembly process
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A lower zipper stopper and a zipper. The lower zipper stopper comprises a lower stopper surface member (4) and a lower stopper bottom member (5). The lower stopper surface member (4) comprises a surface member cylinder (4.3), a hook (4.4) protrudes from an outer peripheral surface of the surface member cylinder (4.3), the hook (4.4) comprises a hook-shaped structure formed by a butt-joint between a guide rod portion (4.4b) and a hook protrusion (4.4a), and the hook protrusion (4.4a) is positioned at the bottom of the hook (4.4) in the axial direction. A main groove (5.3) is provided in the middle of the lower stopper bottom member (5), a bottom member guide protrusion (5.4) and a bottom member limiting protrusion (5.9) are arranged on an inner peripheral surface of the main groove (5.3), the bottom member guide protrusion (5.4) and the bottom member limiting protrusion (5.9) are sequentially arranged in the peripheral direction, and a guide channel (5.11) is formed between the bottom member guide protrusion and the bottom member limiting protrusion. During assembly, firstly, the lower stopper surface member (4) and the lower stopper bottom member (5) are axially aligned; then, the lower stopper surface member (4) and the lower stopper bottom member (5) rotate while axially moving until the lower stopper surface member and the lower stopper bottom member axially abut against each other; and finally, the lower stopper surface member (4) rotates, such that the hook (4.4) is snap-fitted with the bottom member limiting protrusion (5.9), thereby realizing axial limiting. The step of manually determining whether the lower stopper surface member (4) and the lower stopper bottom member (5) are connected in place can be omitted, and use is facilitated.