Slider Lock Member Mounting Strength via Protrusion Design
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Solution Overview
Problem
Conventional slide fastener sliders risk detaching the lock member when an excessive pulling force is applied due to inadequate mounting strength, as the gap between side walls can open, causing the lock member to be dislodged from the slider body.
Innovation Solution
The slider design incorporates protrusions on the upper end edges of the side walls of the mounting portions, which incline towards each other, enhancing the coverage and mounting strength of the lock member by pressing it down, preventing detachment even under excessive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the side walls of the receiving grooves are formed with a gap to allow insertion of a positioning member during assembly, then the ease of manufacture is improved, but the mounting strength of the lock member deteriorates, causing risk of detachment under excessive pulling force
Solution Approach 1:
The positioning member is inserted into the gap between side walls before the crimping process to establish proper alignment. This preliminary positioning action ensures that the lock member is correctly positioned before the side walls are deformed to create the secure mounting, allowing both easy assembly and strong mounting strength
Solution Approach 2:
The side walls transition from a static gap configuration during assembly to a dynamic crimped configuration during mounting. The side walls are deformed inward during crimping to close the gap and secure the lock member, providing both ease of assembly and strong mounting strength at different stages
2Strength
If the side walls are crimped to close the gap and enhance mounting strength, then the strength is improved, but the device complexity increases due to additional crimping process
Solution Approach 1:
The positioning member insertion and the crimping operation are combined into a single assembly sequence. The positioning member is inserted first to establish alignment, then the crimping process immediately follows to secure the mounting, merging two functions into one integrated assembly process that enhances strength without significantly increasing complexity
Data Source
AI summary
There is provided a slide fastener slider. A front mounting portion and a rear mounting portion are respectively provided with receiving grooves for receiving a lock member. The receiving grooves have right and left side walls. Protrusions are respectively provided on upper end edges of the side walls of the front mounting portion. When the upper end portions of the side walls of the front mounting portion are inclined in a direction of approaching each other, the protrusions approach each other, and the protrusions cover the lock member more largely relative to portions of the side walls other than the protrusions.