Slider Lock Pin Offset Design for Fastener Interference
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Solution Overview
Problem
Conventional sliders in fastener systems face challenges in achieving optimal locking strength for lock pins while ensuring smooth insertion of separable pins, often resulting in interference issues.
Innovation Solution
The slider design incorporates a slider body with an upper and lower blade, a guide column, and an element channel, featuring a lock pin with a holding portion, a placement portion, and a pin portion. The placement portion is limited by a limiting portion and can move into a void portion above the pedestal, allowing the pin portion to be offset and inserted into element columns for locking, while the separable pin can pass through without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the lock pin is disposed on one side of the slider body to prevent low locking strength, then the locking strength is improved, but the lock pin will interfere with the insertion of the separable pin
Solution Approach 1:
The patent introduces a limiting portion that constrains the lock pin's movement in the width direction, effectively adding a dimensional constraint. This allows the lock pin to maintain strong locking capability while preventing it from interfering with the separable pin's insertion path, resolving the spatial conflict between these two components.
Solution Approach 2:
The limiting portion acts as an intermediary structure between the lock pin and the separable pin. It controls the lock pin's position and movement, serving as a mediator that prevents direct interference between the lock pin and the separable pin during insertion, while still allowing the lock pin to perform its locking function.
2Ease of operation
If the lock pin is disposed at the center of the slider body to prevent interference with the separable pin, then the insertion of separable pin is smooth, but the locking strength becomes low
Solution Approach 1:
The patent makes the lock pin's position dynamic rather than fixed. The lock pin can move within the accommodating space under the control of the limiting portion, allowing it to adjust its position to achieve both smooth separable pin insertion and strong locking strength, rather than being permanently fixed at the center or one side.
3Reliability
If the placement portion is constrained in width direction to ensure locking strength, then the locking reliability is improved, but the lock pin cannot move freely for unlocking
Solution Approach 1:
The patent divides the lock pin into functional segments: the placement portion that is constrained by the limiting portion for reliable locking, and the pin portion that can move freely for unlocking. This segmentation allows different parts of the lock pin to have different degrees of freedom, resolving the contradiction between locking reliability and unlocking ease.
Data Source
AI summary
A slider includes a slider body, a lock pin, and a tab pull. The slider body has a pair of wall portions, a pin hole formed between the pair of wall portions, and a pedestal portion disposed on at least one side of the pin hole and on one of the pair of wall portions. The lock pin has a holding portion, a placement portion placed on the pedestal portion, and a pin portion extending downward and passing through the pin hole. One of the pedestal portion and the placement portion is provided with a limiting portion for limiting the placement portion in a width direction, and in an accommodating space, a void portion for the placement portion to move is disposed above the pedestal portion. The placement portion is spaced apart from an inner wall of one of the pair of wall portions to form the void portion.