Slider Pull Tab Claw Width Gradient for Stable Pivoting
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Solution Overview
Problem
Existing slider fasteners face challenges in ensuring easy attachment and maintaining a stable pivoting posture of the pull tab during its operation.
Innovation Solution
A slider for slide fasteners featuring a resin-made pull tab with an axial portion and paired bars, where the pull-tab attachment portion includes claws that axially support the axial portion, with a decreasing width from the base to the terminal end of each claw, allowing easier attachment and stable pivoting by reducing the power required to pivot the pull tab.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the pull tab is made with a wide base end claw to ensure stable support, then the attachment stability is improved, but the power required to pivot the pull tab increases
Solution Approach 1:
The claw is designed with non-uniform width along its axial direction, being wider at the base end for stable attachment and narrower at the terminal end to reduce pivoting resistance. This local variation in geometry allows different regions of the same component to serve different functional purposes: the base provides stability while the tip facilitates easy pivoting.
Solution Approach 2:
The width parameter of the claw is varied continuously or in steps from the base end to the terminal end. By changing the geometric parameter (width) along the axial direction, the patent achieves both stable attachment (wider base) and low pivoting power requirement (narrower tip), resolving the contradiction between stability and ease of operation.
2Ease of operation
If the claw width is reduced to lower pivoting power requirement, then the ease of operation is improved, but the attachment stability deteriorates
Solution Approach 1:
Different sections of the claw have different widths tailored to their specific functions. The base end maintains sufficient width for stable attachment, while the terminal end tapers to minimize friction and power requirements during pivoting. This localized differentiation allows the claw to simultaneously achieve both stability and ease of operation.
Solution Approach 2:
The claw's width parameter is deliberately changed along its axial length, creating a gradient from wide at the base to narrow at the tip. This parameter variation enables the claw to provide stable attachment where needed (base) and facilitate easy pivoting where needed (tip), thus resolving the contradiction between ease of operation and attachment stability.
3Device complexity
If the pull tab attachment portion uses a simple structure, then the device complexity is reduced, but the ability to maintain stable pivoting posture deteriorates
Solution Approach 1:
The claw is designed with non-uniform width distribution, being wider at the base and narrower at the tip. This local geometric differentiation, achieved within a single component, provides both simple overall structure and stable pivoting posture through the inherent geometry of the claw itself, eliminating the need for complex multi-component mechanisms.
Solution Approach 2:
The claw's width parameter varies along its axial direction, creating a tapered profile. This parameter change within a single component achieves stable pivoting posture without requiring complex structural mechanisms, thus maintaining simplicity while improving performance.
Data Source
AI summary
A slider may include a slider body, a pull-tab attachment portion provided at the slider body, and a resin-made pull tab attached to the pull-tab attachment portion. The pull tab may include an axial portion and a pair of bars extending from respective ends of the axial portion. The pull-tab attachment portion may include a pair of claws that axially support the axial portion of the pull tab. Each claw may be held by and between the respective paired bars while the pull tab pivots. A width of a terminal end of each claw in an axial direction of the axial portion may be less than a width of a base end of each claw in the axial direction.