Slider Cover Member Angled Surfaces for Pull-Tab Insertion
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Solution Overview
Problem
Existing sliders for slide fasteners face difficulties in preventing cover member deformation under load and facilitating the insertion of a pull-tab's shaft portion into the insertion gap.
Innovation Solution
The slider design features a cover member with a first surface parallel to the body and a second surface extending rearward and upward at a predetermined angle, and an opening/closing member with surfaces that overlap and extend at specific angles to prevent deformation and widen the insertion gap for easier pull-tab insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cover member is designed to prevent deformation under load, then the cover member's structural stability is improved, but the insertion gap becomes narrower making pull-tab insertion difficult
Solution Approach 1:
The cover member is divided into two functional surfaces: a first surface that provides structural support to prevent deformation, and a second surface that extends at an angle to create a widened insertion region. This segmentation allows each surface to fulfill its specific function without compromising the other.
Solution Approach 2:
The second surface of the cover member extends rearward and upward at a predetermined angle from the first surface, creating a three-dimensional stepped structure. This dimensional change widens the insertion gap in the vertical direction while maintaining the horizontal stability provided by the first surface.
2Stability of the object's composition
If the opening/closing member is designed to prevent cover member deformation, then the cover member's structural stability is improved, but the insertion gap becomes narrower making pull-tab insertion difficult
Solution Approach 1:
The opening/closing member is divided into a third surface that provides structural support by overlapping with the first surface, and a fourth surface that extends at an angle to widen the insertion region. This segmentation allows each surface to fulfill its specific function independently.
Solution Approach 2:
The fourth surface extends rearward and downward at a certain angle from the third surface, creating an asymmetric configuration that complements the second surface of the cover member. This asymmetric design widens the insertion gap while maintaining structural stability.
3Stability of the object's composition
If the cover member and opening/closing member are engaged to prevent deformation, then the structural stability is improved, but the insertion gap becomes narrower
Solution Approach 1:
The engagement structure is segmented into multiple surfaces at different levels and angles. The first and third surfaces provide stable engagement, while the second and fourth surfaces extend outward to maintain a wide insertion gap area despite the engagement.
Solution Approach 2:
The second surface of the cover member and the fourth surface of the opening/closing member extend in the vertical dimension at predetermined angles, creating a stepped engagement structure. This dimensional approach allows the members to be engaged for stability while maintaining horizontal insertion gap area.
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 effectively prevents cover member deformation and simplifies the insertion of the pull-tab's shaft portion by ensuring contact between the cover member and opening/closing member surfaces, while widening the insertion gap for easier access.
Implementation Method 1
a coil spring which urges the opening/closing member toward position where the gap is closed
Data Source
Figure 1
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Figure 3
AI summary
Provided is a slider for slide fasteners that can prevent deformation of the cover member and can facilitate insertion of the pull into the insertion space. The slider is equipped with: a body (20); a locking member (40) swingably supported on a pillar (31) standing on the upper surface of the body (20); a cover member (50), which is fitted on the upper surface of the body (20) in a cantilevered state with the front end fixed and which covers the pillar (31) and the locking member (40) from above; and an opening-closing member (60), which is formed between the back end of the cover member (50) and the body (20) and opens and closes the space (S) into which the shaft (15a) of the pull (15) is inserted. The cover member (50) comprises a first surface (81) formed on the back end of the cover member (50) and formed to be substantially parallel to the body (20), and a second surface (82) that extends backward and upward from the back end of the first surface (81) at a prescribed angle. The opening-closing member (60) comprises a third surface (83) that lies under the first surface (81) in the vertical direction and is formed to be substantially parallel to the first surface (81), and a fourth surface (84) that extends backward and downward from the back end of the third surface (83) at a prescribed angle.