Slider Tab Holder Attachment Strength via Inclined Surfaces
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Solution Overview
Problem
Existing sliders for slide fasteners face issues with attachment strength, durability, and external appearance due to defects caused by barrel polishing, which affects the engagement mechanism and visibility of bleached areas.
Innovation Solution
The design includes inclined surfaces and support walls on column portions with recessions and protrusions, allowing for secure engagement and attachment of the tab holder without increasing thickness, preventing damage during polishing and enhancing the external appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cover body is made of relatively hard resin and elastically deformed for engagement, then attachment strength is improved, but the gap may not return to previous state causing slip and reduced durability
Solution Approach 1:
The patent changes the material parameter from hard resin to soft resin for the cover body, allowing elastic deformation during engagement while ensuring the gap returns to its original state, preventing slip and improving durability
2Reliability
If support walls are installed at the sides of column portions to prevent slip, then reliability is improved, but the edges protrude and are damaged or bleached during barrel polishing
Solution Approach 1:
The patent removes the protruding support walls that caused damage during polishing, instead forming recessions directly on the inclined surfaces of the column portions to prevent slip, eliminating the harmful protruding edges
3Productivity
If the cover body is forcibly pressed during automatic assembly, then assembly speed is improved, but the cover body may be broken
Solution Approach 1:
The patent changes the material parameter to soft resin that allows elastic deformation, enabling the cover body to withstand forced pressing during automatic assembly without breaking, thus improving assembly speed while maintaining integrity
4Ease of operation
If engaging portions are made to slide along inclined surfaces, then ease of operation is improved, but the engaging portions may contact plane portions first causing assembly failure
Solution Approach 1:
The patent designs the engaging portions to contact the inclined surfaces first before reaching the plane portions, ensuring smooth sliding engagement occurs preliminary to any potential contact with the plane portions, preventing assembly failure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances attachment strength, prevents damage during barrel polishing, and improves the external appearance by ensuring smooth engagement and attachment, while maintaining durability and assembly performance.
Implementation Method 1
by elastically deforming a cover body configured as the tab holder 69
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Engaged portions (41a, 41b) formed on the inner sides at both front and rear ends of a tab holder (40) are elastically engaged and attached to engaging portions (22, 32) formed on the front side of a first column portion (20) and the rear side of a second column portion (30) on an upper blade (11), and a pair of protrusions (42, 42) formed on the inner side of the tab holder (40) are fitted in a recession (23) formed on an inclined surface (21a) of the first column portion (20) and a recession (33) formed on an inclined surface (31a) of the second column portion (30). Further, stepped portions formed at both edge portions of both front and rear ends of the tab holder (40) are brought in contact with end surfaces and inner sides of support walls (24, 24, 34, 34) installed at both edge portions of inclined surfaces (21a, 31a). Holding force in the front-rear direction, left-right direction, or an inclined direction or up-down direction of the tab holder (40) is increased against very large operation force based on operation of the tab (18). Therefore, it is possible to provide a slider for a slide fastener that can improve attachment strength of the tab holder, implement excellent durability for a long period of time, excellent external appearance, and excellent assembly performance.