Slider Blocking Member Prevents Tab Pinching
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Solution Overview
Problem
Conventional sliders for slide fasteners face issues where external members, such as thin patches, can accidentally enter and get pinched in the insertion gap, leading to obstruction and unintended disconnection of the tab, especially when used in clothing or bags.
Innovation Solution
A slider design with a cantilevered tab attaching rod and an immovably fixed blocking member that retains the insertion gap's blocked state, preventing external members from intruding and ensuring secure attachment of the tab to the slider body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blocking member is mounted to the slider body to block the insertion gap, then external members are prevented from entering the insertion gap, but the blocking member may accidentally disengage allowing external members to enter and get pinched
Solution Approach 1:
The occlusion retaining structure is pre-configured on the blocking member to automatically engage with the tab attaching rod, ensuring the insertion gap remains blocked before any external member can accidentally enter. This preliminary engagement prevents the blocking member from disengaging and allows workers to attach tabs without manually holding the blocking member engaged.
Solution Approach 2:
The blocking member is designed with differentiated local structures: an occlusion portion that blocks the insertion gap, a resilient piece portion that provides elastic engagement, and an occlusion retaining structure with a regulation portion that specifically interacts with the tab attaching rod. Each local structure performs a specific function to collectively prevent accidental disengagement.
2Ease of operation
If the blocking member is made resiliently deformable to facilitate tab attachment, then the insertion gap can be opened for tab insertion, but the blocking member may not reliably retain the blocked state preventing external member intrusion
Solution Approach 1:
The blocking member incorporates a resilient piece portion that can dynamically deform elastically. This allows the blocking member to flexibly open the insertion gap when a tab is being attached, then automatically return to its blocked state, providing both ease of operation and reliable retention of the blocked state.
Solution Approach 2:
The occlusion retaining structure creates a mechanical feedback system where the regulation portion on the blocking member interacts with the tab attaching rod to provide tactile and mechanical confirmation of engagement. This feedback ensures the blocking member remains reliably engaged in the blocked state while allowing controlled deformation for tab attachment.
Data Source
AI summary
A slider is structured such that a tab attaching rod is integrally formed in a cantilevered state in an upper blade of a slider body, and a blocking member blocking an insertion gap which is formed between the upper blade and a free end portion of the tab attaching rod is engaged with a mounting portion of the slider body so as to be immovably fixed, and is provided with an occlusion retaining structure which retains a blocked state of the insertion gap at a time of fixing the blocking member and can prevent the other member from intruding into the insertion gap. Accordingly, the slider can easily attach a tab afterward to the tab attaching rod. Further, it is possible to securely prevent the other member from intruding between the upper blade and the free end portion of the tab attaching rod.