Zipper Slider Rebound Mechanism via Cam and Rivet Interaction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing zipper heads fail to automatically rebound after the zipper is closed, leading to loosening and inconvenience, particularly in sports scenarios.
Innovation Solution
A zipper head design featuring a pull tab with a horizontal portion and side post, where the front rivet body group contacts the side post to block rotation and exert force, allowing the pull tab to rebound and lock the zipper, ensuring it remains fixed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a return blocker is provided on the pull tab to enable rebound, then the pull tab can rebound back after being pulled, but the pull tab gets stuck when right perpendicular to the pull body and does not rebound back
Solution Approach 1:
The return blocker is segmented into two distinct structures: a first return blocker and a second return blocker positioned at different locations. The first return blocker prevents the pull tab from rotating beyond the upright position, while the second return blocker prevents the pull tab from rotating to the opposite side. This segmentation allows the pull tab to rebound smoothly without getting stuck, as each blocker handles a specific rotation stage independently.
Solution Approach 2:
The cam structure acts as an intermediary mechanism between the pull tab and the return blockers. When the pull tab is pulled to an almost perpendicular position, the cam contacts the first return blocker, converting the linear pulling motion into rotational motion that triggers the rebound. The cam smoothly transitions the pull tab through the upright position to the opposite side, preventing sticking while enabling controlled rebound.
2Reliability
If the pull tab is designed to be rotatable for locking, then the zipper can be locked in place, but the pull tab cannot automatically rebound after closure causing the zipper to loosen
Solution Approach 1:
The cam structure is pre-configured to automatically engage with the first return blocker when the pull tab reaches the upright position during closure. This preliminary arrangement ensures that as the pull tab rotates to lock the zipper, the cam simultaneously triggers the rebound mechanism, causing the pull tab to automatically return to the closed position without requiring manual intervention.
Solution Approach 2:
The system incorporates a feedback mechanism where the position of the pull tab is continuously monitored through the cam's interaction with the return blockers. When the pull tab reaches the upright position (indicating closure), the cam detects this position and automatically initiates the rebound action. This feedback loop ensures the pull tab automatically returns to the closed position, maintaining the locked state without manual operation.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A slider and a zipper comprising the slider. The slider comprises a pull tab (2), a slider body (1), and a safety catch (9); the slider body (1) is provided with an upper base plate (5) and a lower base plate (6); the upper base plate (5) is provided with a rear rivet body set (4) and a front rivet body set (3) which are arranged in a corresponding manner; when the pull tab (2) is rotated and contacts the front rivet body set (3), the front rivet body set (3) contacts a side column of the pull tab (2) to block the overturn of the pull tab (2). The front rivet body set (3) applies a force on the rotated pull tab (2), such that the pull tab (2) is rebounded to the rear end of the slider by taking a horizontal part as a rotating axis, and the safety catch (9) is locked downwards to lock the zipper so that the zipper is fixed at a corresponding position, thereby achieving rebounding of the pull tab (2).